BACKGROUND:Liver ischemia reperfusion(IR)injury triggers a systemic inflammatory response and is the main cause of organ dysfunction and adverse postoperative outcomes after liver surgery.Pentoxifylline(PTX)and h...BACKGROUND:Liver ischemia reperfusion(IR)injury triggers a systemic inflammatory response and is the main cause of organ dysfunction and adverse postoperative outcomes after liver surgery.Pentoxifylline(PTX)and hypertonic saline solution(HTS)have been identified to have beneficial effects against IR injury.This study aimed to investigate if the addition of PTX to HTS is superior to HTS alone for the prevention of liver IR injury.METHODS: Male Wistar rats were allocated into three groups. Control rats underwent 60 minutes of partial liver ischemia, HTS rats were treated with 0.4 mL/kg of intravenous 7.5% NaCl 15 minutes before reperfusion, and HPTX group were treated with 7.5% NaC1 plus 25 mg/kg of PTX 15 minutes before reperfusion. Samples were collected after reperfusion for determination of ALT, AST, TNF-α, IL-6, IL-10, mitochondrial respiration, lipid peroxidation, pulmonary permeability and myeloperoxidase. RESULTS: HPTX significantly decreased TNF-α 30 minutes after reperfusion. HPTX and HTS significantly decreased ALT,AST, IL-6, mitochondrial dysfunction and pulmonary myelo- peroxidase 4 hours after reperfusion. Compared with HTS only, HPTX significantly decreased hepatic oxidative stress 4 hours after reperfusion and pulmonary permeability 4 and 12 hours after reperfusion. CONCLUSION: This study showed that PTX added the beneficial effects of HTS on liver IR injury through decreases of hepatic oxidative stress and pulmonary permeability.展开更多
Objective To determine whether radiofrequency ablation using hypertonic saline solution instillation can increase the extent of thermally mediated coagulation in ex vivo pig liver tissue. Methods Fifty-six radiofreque...Objective To determine whether radiofrequency ablation using hypertonic saline solution instillation can increase the extent of thermally mediated coagulation in ex vivo pig liver tissue. Methods Fifty-six radiofrequency ablation lesions were produced in fresh ex vivo pig’s liver. According to different saline solutions, the lesions were divided into six groups: 25% acetic acid, 18% NaCl, 10% NaCl, 5% NaCl, 0.9% NaCl, and distilled water. After radiofrequency ablation, the lesions size and morphology were measured and compared.Results Using different instillation, the volume of coagulation necrosis was different: 25% acetic acid >18% NaCl >10% NaCl >5% NaCl >0.9% NaCl>distilled water. Conclusion Radiofrequency ablation using hypertonic saline solution instillation can increase the volume of radiofrequency ablation induced necrosis.展开更多
AIM To test the safety and effectiveness of hypertonic saline solution(HSS + F) as a strategy for weight loss andprevention of further deterioration of renal function.METHODS Patients admitted with acute decompensated...AIM To test the safety and effectiveness of hypertonic saline solution(HSS + F) as a strategy for weight loss andprevention of further deterioration of renal function.METHODS Patients admitted with acute decompensated heart failure(ADHF) who received HSS + F were included in the study. After a period of a standard ADHF treatment, our patients received an intravenous infusion of furosemide(250 mg) combined with HSS(150 mL of 3% NaCl) twice a day for a mean duration of 2.3 d. Our primary outcomes were weight loss and a change in serum creatinine per day of treatment. The parameters of the period prior to treatment with HSS + F were compared with those of the period with HSS + F. RESULTS A total of 47 patients were included. The mean creatinine on admission was 155 μmol/L ± 65 μmol/L, the ejection fraction was 40% ± 17%. The experimental treatment(HSS + F) resulted in greater weight loss per day of treatment than the standard treatment(-1.4 kg/d ± 1.4 kg/d vs-0.4 kg/d ± 1.0 kg/d, P = 0.0168). Importantly, the change in creatinine was not significantly different.CONCLUSION This study supports the effectiveness of HSS + F on weight loss in patients with ADHF. The safety profile, particularly with regard to renal function, leads us to believe that HSS + F may be a valuable option for those patients presenting with ADHF who do not respond to conventional treatment with intravenous furosemide alone.展开更多
Objective: To study the effect of hypertonic saline solution on the left ventricular functions of isolated hearts from burned rats. Methods: Thirty six Wistar rats were used and divided into 4 groups: (1) normal heart...Objective: To study the effect of hypertonic saline solution on the left ventricular functions of isolated hearts from burned rats. Methods: Thirty six Wistar rats were used and divided into 4 groups: (1) normal hearts perfused with isotonic Krebs Henseleit solution; (2) normal hearts perfused with Krebs Henseleit solution which contained 215 mmol/L Na +; (3) hearts of rats suffered from 25% TBSA third degree burn and perfused with isotonic Krebs Henseleit solution; (4) hearts of the burned rats perfused with Krebs Henseleit solution which contained 215 mmol/L Na +. The systolic and diastolic functions of the left ventricle were observed.Results: During perfusion, there were very short periods of decrease in heart systolic and diastolic functions at first, but they recovered very soon and even became stronger than normal both in the normal and burned rats. The systolic and diastolic functions of the hearts increased very significantly when the perfusion solution was changed to isotonic solution from the hypertonic solutions. The effect of the hypertonic saline solution on the ventricular systolic and diastolic improvements was stronger in the hearts of the burned rats than that in the normal hearts. Conclusions: Hypertonic saline solution can directly affect myocardium and significantly improve the ventricular systolic and diastolic functions, especially in the hearts of the burned rats.展开更多
To compare the early effects of hypertonic and isotonic saline resuscitation on heme oxygenase-1 (HO-1) expression in organs of rats with hemorrhagic shock. Rats were randomly divided into hypertonic saline resuscit...To compare the early effects of hypertonic and isotonic saline resuscitation on heme oxygenase-1 (HO-1) expression in organs of rats with hemorrhagic shock. Rats were randomly divided into hypertonic saline resuscitation (HTS), normal saline resuscitation (NS) and sham groups. HO-1 mRNA, protein expression and apoptosis were evaluated in organs. In the HTS group, significant difference was noted in HO-1 protein in small intestinal mucosa and liver compared with the NS and sham groups, and in HO-1 mRNA in liver and kidney compared with the sham group. The apoptosis of small intestinal mucosa, liver, heart, and lung was significantly lower in the HTS group than that in the NS group. In this study, small volume resuscitation with HTS can efficiently up-regulate the expression level of HO-1 in small intestinal mucosa and liver, which may be one of the mechanisms alleviating organ damage.展开更多
A new simulation system for the laboratory investigation of fretting wear is developed. It consist of a mechanism device, a electrochemical cell and a datum acqulsition and process software. Fretting of surgical 316L ...A new simulation system for the laboratory investigation of fretting wear is developed. It consist of a mechanism device, a electrochemical cell and a datum acqulsition and process software. Fretting of surgical 316L stainlesssteel in saline is studied. The results show that electrochemical corrosion is enhanced by fretting and anodic currentdensity under fretting is 100 times than static condition. Fretting corrosion is a mechanic -elec trochemical al Process.展开更多
AIM:To investigate the effect of local intestinal perfusion with hypertonic saline(HTS) on intestinal ischemia-reperfusion injury(IRI) in bothex vivo andin vivo rat models.METHODS:All experiments were performed on mal...AIM:To investigate the effect of local intestinal perfusion with hypertonic saline(HTS) on intestinal ischemia-reperfusion injury(IRI) in bothex vivo andin vivo rat models.METHODS:All experiments were performed on male Wistar rats anesthetized with pentobarbital sodium given intraperitoneally at a dose of 60 mg/kg.Ex vivo vascularly perfused rat intestine was subjected to 60-min ischemia and either 30-min reperfusion with isotonic buffer(controls),or 5 min with HTS of 365 or 415 mOsm/L osmolarity(HTS 365mOsm or HTS 415mOsm,respectively) followed by 25-min reperfusion with isotonic buffer.The vascular intestinal perfusate flow(IPF) rate was determined by collection of the effluent from the portal vein in a calibrated tube.Spontaneous intestinal contraction rate was monitored throughout.Irreversible intestinal injury or area of necrosis(AN) was evaluated histochemically using 2.3.5-triphenyltetrazolium chloride staining.In vivo,30-min ischemia was followed by either 30-min blood perfusion or 5-min reperfusion with HTS 365mOsm through the superior mesenteric artery(SMA) followed by 25-min blood perfusion.Arterial blood pressure(BP) was measured in the common carotid artery using a miniature pressure transducer.Histological injury was evaluated in both preparations using the Chui score.RESULTS:Ex vivo,intestinal IRI resulted in a reduction in the IPF rate during reperfusion(P < 0.05 vs sham).The postischemic recovery of the IPF rate did not differ between the controls and the HTS 365mOsm group.In the HTS 415mOsm group,postischemic IPF rates were lower than in the controls and the HTS 365mOsm group(P < 0.05).The intestinal contraction rate was similar at baseline in all groups.An increase in this parameter was observed during the first 10 min of reperfusion in the control group as compared to the sham-treated group,but no such increase was seen in the HTS 365mOsm group.In controls,AN averaged 14.8% ± 5.07% of the total tissue volume.Administration of HTS 365mOsm for 5 min after 60-min ischemia resulted in decrease in AN(5.1% ± 1.20% vs controls,P < 0.01).However,perfusion of the intestine with the HTS of greater osmolarity(HTS 415mOsm) failed to protect the intestine from irreversible injury.The Chiu score was lower in the HTS 365mOsm group in comparison with controls(2.4 ± 0.54 vs 3.2 ± 0.44,P = 0.042),while intestinal perfusion with HTS 415mOsm failed to improve the Chiu score.Intestinal reperfusion with HTS 365mOsm in the in vivo series secured rapid recovery of BP after its transient fall,whereas in the controls no recovery was seen.The Chiu score was lower in the HTS 365mOsm group vs controls(3.1 ± 0.26 and 3.8 ± 0.22,P = 0.0079 respectively,),although the magnitude of the effect was lower than in the ex vivo series.CONCLUSION:Brief intestinal postischemic perfusion with HTS 365mOsm through the SMA followed by blood flow restoration is a protective procedure that could be used for the prevention of intestinal IRI.展开更多
AIM: To investigate the effects of 7.5% hypertonic saline on positive fluid balance and negative fluid balance, after radical surgery for gastrointestinal carcinoma. METHODS: Fifty-two patients with gastrointestinal c...AIM: To investigate the effects of 7.5% hypertonic saline on positive fluid balance and negative fluid balance, after radical surgery for gastrointestinal carcinoma. METHODS: Fifty-two patients with gastrointestinal carcinoma undergoing radical surgery were studied. The patients were assigned to receive either Ringer lactate solution following 4 mL/kg of 7.5% hypertonic saline (the experimental group, n = 26) or Ringer lactate solution (the control group, n = 26) during the early postoperative period in SICU. Fluid infusion volumes, urine outputs, fluid balance, body weight change, PaO2/FiO2 ratio, anal exhaust time as well as the incidence of complication and mortality were compared between the two groups. RESULTS: Urine outputs on the operative day and the first postoperative day in experimental group were significantly more than in control group (P<0.000001, P=0.000114). Fluid infusion volumes on the operative day and the first postoperative day were significantly less in experimental group than in control group (P= 0.000042, P= 0.000415). The volumes of the positive fluid balance on the operative day and during the first 48 h after surgery, in experimental group, were significantly less than in control group (P<0.000001). Body weight gain post-surgery was significantly lower in experimental group than in control group (P<0.000001). The body weight fall in experimental group occurred earlier than in control group (P<0.000001). PaO2/FiO2 ratio after surgery was higher in experimental group than in control group (P= 0.000111). The postoperative anal exhaust time in experimental group was earlier than in control group (P= 0.000006). The overall incidence of complications and the incidence of pulmonary infection were lower in experimental group than in control group (P= 0.0175, P= 0.0374). CONCLUSION: 7.5% hypertonic saline has an intense diuretic effect and causes mobilization of the retained fluid, which could reduce fluid infusion volumes and positive fluid balance after radical surgery for gastrointestinal carcinoma, as well as, accelerate the early appearance of negative fluid balance after the surgery, improve the oxygen diffusing capacity of the patients' alveoli, and lower the overall incidence of complications and pulmonary infection after the surgery.展开更多
AIM: To investigate the effects of hypertonic saline in the neurocritical care population.METHODS: We retrospectively reviewed our hospital's use of hypertonic saline(HS) since March of 2005, and prospectively sin...AIM: To investigate the effects of hypertonic saline in the neurocritical care population.METHODS: We retrospectively reviewed our hospital's use of hypertonic saline(HS) since March of 2005, and prospectively since October 2010. Comparisons were made between admission diagnoses, creatinine change(Cr), and HS formulation(3% Na Cl, 3% Na Cl/sodium acetate mix, and 23.4% Na Cl) to patients receiving normal saline or lactated ringers. The patients(n = 1329) of the retrospective portion were identified. The data presented represents the first 230 patients with data. RESULTS: Significant differences in Acute Physiology and Chronic Health Evaluation Ⅱ scores and GlasgowComa Scale scores occurred between different saline formulations. No significant correlation of Cl- or Na+ with Cr, nor with saline types, occurred. When dichotomized by diagnosis, significant correlations appear. Traumatic brain injury(TBI) patients demonstrated moderate correlation between Na+ and Cr of 0.45. Stroke patients demonstrated weak correlations between Na+ and Cr, and Cl- and Cr(0.19 for both). Patients receiving HS and not diagnosed with intracerebral hemorrhage, stroke, subarachnoid hemorrhage, or TBI demonstrated a weak but significant correlation between Cl- and Cr at 0.29.CONCLUSION: Cr directly correlates with Na+ or Cl- in stroke, Na+ in TBI, and Cl- in other populations. Prospective comparison of HS and renal function is needed.展开更多
Cystic fibrosis(CF) is a multisystem disorder with significantly shortened life expectancy. The major cause of mortality and morbidity is lung disease with increasing pulmonary exacerbations and decline in lung functi...Cystic fibrosis(CF) is a multisystem disorder with significantly shortened life expectancy. The major cause of mortality and morbidity is lung disease with increasing pulmonary exacerbations and decline in lung function predicting significantly poorer outcomes. The pathogenesis of lung disease in CF is characterised in part by decreased airway surface liquid volume and subsequent failure of normal mucociliary clearance. This leads to accumulation of viscous mucus in the CF airway, providing an ideal environment for bacterial pathogens to grow and colonise, propagating airway inflammation in CF. The use of nebulised hypertonic saline(HTS) treatments has been shown to improve mucus clearance in CF and impact positively upon exacerbations, quality of life, and lung function. Several mechanisms of HTS likely improve outcome, resulting in clinically relevant enhancement in disease parameters related to increase in mucociliary clearance. There is increasing evidence to suggest that HTS is also beneficial through its anti-inflammatory properties and its ability to reduce bacterial activity and biofilm formation. This review will first describe the use of HTS in treatment of CF focusing on its efficacy and tolerability. The emphasis will then change to the potential benefits of aerosolized HTS for the attenuation of receptor mediated neutrophil functions, including down-regulation of oxidative burst activity, adhesion molecule expression, and the suppression of neutrophil degranulation of proteolytic enzymes.展开更多
This study aimed to investigate whether a small volume of 7.2% hypertonic saline solution with 6% dextran 70 (HSD) is superior to mannitol in vasodilatation of encephalic vessels in the dogs using magnetic resonance i...This study aimed to investigate whether a small volume of 7.2% hypertonic saline solution with 6% dextran 70 (HSD) is superior to mannitol in vasodilatation of encephalic vessels in the dogs using magnetic resonance imaging (MRI). Fifteen healthy 2.4 ± 0.9 year-old purpose-bred male Beagle dogs were assigned to receive 5 mL/kg of isotonic saline solution (ISS) as control, 20% mannitol or HSD infusion at a flow rate of 20 mL/kg/hours via right cephalic vein.Venous blood samples were collected immediately before fluid infusion (pre) and every 15 minutes until 120 minutes after the initiation of fluid infusion. Immediately after collection of each blood sample, T1 and T2-weighted magnetic resonance imaging recordings were undergone. Immediately after HSD infusion, the area of the cross-section of superior sagittal sinus was significantly greater than that of beagles in the other groups (p p < 0.001). Our results indicate that HSD induced a rapid and strong reduction in the area of the cross-section of CSF more than mannitol did. Therefore, it is suggested that 5 mL/kg of HSD might be superior to isovolume of mannitol in inducing vasodilatation in the dog.展开更多
Electrical discharges in or in contact with liquid can produce H2O2effectively.However,wound treatment requires not only high energy yield,but also low temperature,stability,safety and reproducibility in H2O2generatio...Electrical discharges in or in contact with liquid can produce H2O2effectively.However,wound treatment requires not only high energy yield,but also low temperature,stability,safety and reproducibility in H2O2generation.Thus a method of producing H2O2in saline solution reacting with He/H2O plasma jet is described in this paper.Two working modes(bullet and arc modes)are stable while keeping at low temperature in the H2O2production.The production is much faster under the arc mode,but has rather high production rate and energy efficiency under the bullet mode.Plus,the energy efficiency increases with treatment time and higher moist helium flow rate under both modes,but especially the bullet mode.Moreover,55 min after the plasma treatment,there is only 6%degradation of H2O2concentration in the saline solution,and this indicates the potential of He/H2O plasma jet in plasma pharmacy.展开更多
Introduction: Chronic sinusitis affects all age groups and is a cause for significant morbidity. Recent realization that noninfectious inflammatory causes can predispose to infectious sinusitis has evoked renewed inte...Introduction: Chronic sinusitis affects all age groups and is a cause for significant morbidity. Recent realization that noninfectious inflammatory causes can predispose to infectious sinusitis has evoked renewed interest in developing and documenting efficacious ancillary therapies that could supplement antibiotic use. Hypertonic saline solution has been shown to increase mucociliary clearance and ciliary beat frequency. Objectives: A double blinded randomized comparative study was undertaken to evaluate the effect of hypertonic saline (3.5%) nasal drops and normal saline (0.9%) nasal drops, to assess the tolerance of hypertonic saline nasal drops and to know if hypertonic nasal drops improve the “quality of life” in patients with chronic sinusitis. Methods: Fifty patients diagnosed as chronic sinusitis in the age group of 18-45 years were randomized into two groups;Group A was treated with normal saline and Group B with 3.5% hypertonic saline for a period of 4 weeks. Pre and Post treatment x-rays of the paranasal sinuses (Water’s view) were graded and radiological scores were given accordingly. The symptoms were evaluated before and after treatment using visual analogue score. Patients were queried about tolerance to the nasal solution and scores were given. Conclusion: Hypertonic saline nasal solution is more efficacious than normal saline solution in the treatment of patients with chronic sinusitis. Hypertonic saline nasal solution was well tolerated and it improved quality of life in these patients.展开更多
To investigate the effect of hypertonic saline / dextran 70 (HSD) on cardiac function in delayed resuscitation of burn shock. Methods: HSD was used for resuscitation 6 h postburn in dogs and its effect on cardiac func...To investigate the effect of hypertonic saline / dextran 70 (HSD) on cardiac function in delayed resuscitation of burn shock. Methods: HSD was used for resuscitation 6 h postburn in dogs and its effect on cardiac function was evaluated byvolume load,MAP, LVSP,LVEDP, + dp/dtmax, -dp/dtmax, CO and SVR. Results: The volume of HSD was 30.50% less duringfirst 24 h postburn and 59.50% less during 4 h after resuscitation than that of lactated Ringer’s solution (LR’s). MAP, LVSP,LVEDP, + dp/dtmax, -dp/dtmax and CO increased and SVR reduced in HSD resuscitation. Conclnsion: Smaller volume of HSD canexpand plasma volume significantly and improve cardiac function in delayed resuscitation of burn shock.展开更多
cyanoacrylate and a mixture of 72% chromated glycerinwith hypertonic glucose solution in management ofgastric varices.METHODS: Ninety patients with gastric varicespresented to Endoscopy Unit of Ain Shams UniversityHo...cyanoacrylate and a mixture of 72% chromated glycerinwith hypertonic glucose solution in management ofgastric varices.METHODS: Ninety patients with gastric varicespresented to Endoscopy Unit of Ain Shams UniversityHospital were included. They were randomly allocatedinto three groups; each group included 30 patients treatedwith intravariceal sclerosant injections in biweeklysessions till complete obturation of gastric varices;Group I (n-butyl-2-cyanoacrylate; Histoacryl?), GroupII (iso-amyl-2-cyanoacrylate; Amcrylate?) and GroupIII (mixture of 72% chromated glycerin; Scleremo?with glucose solution 25%). All the procedures wereperformed electively without active bleeding. Recruitedpatients were followed up for 3 mo.RESULTS: 26% of Scleremo group had bleeding duringpuncture vs 3.3% in each of the other two groups withsignificant difference, (P 〈 0.05). None of Scleremogroup had needle obstruction vs 13.3% in each of theother two groups with no significant difference, (P 〉0.05). Rebleeding occurred in 13.3% of Histoacryl andAmcrylate groups vs 0% in Scleremo group with nosignificant difference. The in hospital mortality was 6.6%in both Histoacryl and Amcrylate groups, while it was0% in Scleremo group with no significant difference. Inthe first and second sessions, the amount of Scleremoneeded for obturation was significantly high, while the amount of Histoacryl was significantly low. Scleremo was the less costly of the two treatments. CONCLUSION: All used sclerosant substances showed efficacy and success in management of gastric varices with no significant differences except in total amount,cost and bleeding during puncture.展开更多
Objective: To find out the optimal concentration, infusion rate and dosage of saline for resuscitation.Methods: Forty five dogs were used to establish hypovolemic shock models. The dogs were resuscitated with saline o...Objective: To find out the optimal concentration, infusion rate and dosage of saline for resuscitation.Methods: Forty five dogs were used to establish hypovolemic shock models. The dogs were resuscitated with saline of different concentrations and different dosages under different infusion rates, and the resuscitation results were compared. Results: The best concentration was 7.5 %, the best rate of infusion 20 ml/min (a volume equivalent to 15% of the shed blood) and the best dosage 5.71 ml/kg. The method was effective for resuscitation, the mean arterial pressure (MAP) could be elevated to 89% of the baseline, and this MAP could be kept for more than one hour. Conclusions: Using 7.5 % sodium chloride solution equivalent to 15% of the shed blood at an infusion rate of 20 ml/min can achieve a best resuscitation result.展开更多
Background Massive blood loss due to trauma is the leading cause of death in trauma patients and military combatants. The fluid category of resuscitation for hypotensive trauma patients is open to debate. This study w...Background Massive blood loss due to trauma is the leading cause of death in trauma patients and military combatants. The fluid category of resuscitation for hypotensive trauma patients is open to debate. This study was conducted to investigate the early effects of hypertonic and isotonic saline solutions on heme oxygenase-1 (HO-1) mRNA expression and apoptosis in the intestinal mucosa of rats with hemorrhagic shock. Methods A model of severe hemorrhagic shock was established in 21 Sprague-Dawley rats. The rats were randomly divided into sham, normal saline resuscitation (NS), and hypertonic saline resuscitation (HTS) groups, with 7 in each group. We assessed and compared the HO-1 mRNA expression and apoptosis in the small intestinal mucosa of rats after hemorrhagic shock and resuscitation using the SYBR Green I fluorescence quantitative reverse transcriptase polymerase chain reaction, fluorescein-iso-thiocyanate-annexin V/propidium iodide double staining, and flow cytometry. Results In the early stage of hemorrhagic shock and resuscitation, marked apoptosis occurred in the small intestinal mucosa from both the NS and HTS groups. The apoptotic rate in the NS group was higher than that in the HTS group (P 〈0.01). Among the three groups, HO-1 mRNA mucosa from the HTS group had the highest level of expression; however, the differences were not significant. There was a significant negative correlation between HO-1 mRNA expression and apoptosis in the small intestinal mucosa from the NS and HTS groups after hemorrhagic shock and resuscitation. Conclusions In this rat model of severe hemorrhagic shock, HTS resuscitation with a small volume is more effective than NS resuscitation in reducing apoptosis of the intestinal mucosa. Further, HO-1 mRNA over-expression in the intestinal mucosa may be one of the molecular mechanisms of HTS in the resuscitation of hemorrhagic shock.展开更多
Fenton oxidation is generally inhibited in the presence of a high concentration of chloride ions.This study investigated the feasibility of using benzoquinone(BQ) and hydroxylamine hydrochloride(HA) as Fenton enha...Fenton oxidation is generally inhibited in the presence of a high concentration of chloride ions.This study investigated the feasibility of using benzoquinone(BQ) and hydroxylamine hydrochloride(HA) as Fenton enhancers for the removal of glycerin from saline water under ambient temperature by accelerating the ferric system.It was found that organics removal was not obviously affected by chloride ions of low concentration(less than 0.1 mol/L),while the mineralization rate was strongly inhibited in the presence of a large amount of chloride ions.In addition,ferric hydrolysis-precipitation was significantly alleviated in the presence of HA and BQ,and HA was more effective in reducing ferric ions into ferrous ions than HA,while the H_2O_2 decomposition rate was higher in the BQ-Fenton system.Electron spin resonance analysis revealed that OH production was reduced in high salinity conditions,while it was enhanced after the addition of HA and BQ(especially HA).This study provided a possible solution to control and alleviate the inhibitory effect of chloride ions on the Fenton process for organics removal.展开更多
Compton scattering saline solution was researched. Firstly according to the Compton scattering theory the linear relationship between the concentration and the scattered photon counts was obtained. And then it was pro...Compton scattering saline solution was researched. Firstly according to the Compton scattering theory the linear relationship between the concentration and the scattered photon counts was obtained. And then it was proved by Compton scattering experiments for some solutions. According to those experiments, it was found that the slope was decreased when the atomic number of the cation was increased for alkali metal chloride solutions and alkaline-earth metal chloride solutions. Based on those relationships, a new method was promoted with which to measure the concentration of saline solution untouched the measured solution.展开更多
Abstract Objective To investigate the therapeutic effect of hypertonic saline (HS) and hypertonic saline with taurine (HST) hemorrhagic shock and hemorrhagic shock with hypernatremia rats. Methods Hypern...Abstract Objective To investigate the therapeutic effect of hypertonic saline (HS) and hypertonic saline with taurine (HST) hemorrhagic shock and hemorrhagic shock with hypernatremia rats. Methods Hypernatremic dehydration and hemorrhagic shock models were produced by Trachtma's and Krausz's methods in Sprague Dawley rats. Hemorrhagic changes of mean arterial blood pressure (MABP), left ventricular end diastolic pressure (LVEDP), ±dp/dtmax and heart rate (HR) were registered on polygraph. Plasma Na +, urea lactate and taurine content were assayed. Results After treatment with HS, the hemodynamic changes of hemorrhagic shock rats were significantly alleviated, and tissue fluid redistributed. When the hemorrhagic shock animals were treated with HS containing taurine (HST), in comparison with HS treatment, the hemodynamic improvement and hemodilution were more obvious. When the hemorrhagic animals complicated with hypernatremia were treated with HS, the symptoms of dehydration and shock further deteriorated, when the hemorrhage with hypernatremia animals were treated with an infusion of HST, the symptoms of dehydration and shock were significantly ameliorated. Conclusion The therapeutic effect of HS with taurine is obviously better than HS alone. So when hemorrhagic shock was complicated with hypernatremia, HS with taurine is recommended in stead of HS alone.展开更多
基金supported by a grant from Sao Paulo Foundation Research FAPESP 2011/05214-3
文摘BACKGROUND:Liver ischemia reperfusion(IR)injury triggers a systemic inflammatory response and is the main cause of organ dysfunction and adverse postoperative outcomes after liver surgery.Pentoxifylline(PTX)and hypertonic saline solution(HTS)have been identified to have beneficial effects against IR injury.This study aimed to investigate if the addition of PTX to HTS is superior to HTS alone for the prevention of liver IR injury.METHODS: Male Wistar rats were allocated into three groups. Control rats underwent 60 minutes of partial liver ischemia, HTS rats were treated with 0.4 mL/kg of intravenous 7.5% NaCl 15 minutes before reperfusion, and HPTX group were treated with 7.5% NaC1 plus 25 mg/kg of PTX 15 minutes before reperfusion. Samples were collected after reperfusion for determination of ALT, AST, TNF-α, IL-6, IL-10, mitochondrial respiration, lipid peroxidation, pulmonary permeability and myeloperoxidase. RESULTS: HPTX significantly decreased TNF-α 30 minutes after reperfusion. HPTX and HTS significantly decreased ALT,AST, IL-6, mitochondrial dysfunction and pulmonary myelo- peroxidase 4 hours after reperfusion. Compared with HTS only, HPTX significantly decreased hepatic oxidative stress 4 hours after reperfusion and pulmonary permeability 4 and 12 hours after reperfusion. CONCLUSION: This study showed that PTX added the beneficial effects of HTS on liver IR injury through decreases of hepatic oxidative stress and pulmonary permeability.
文摘Objective To determine whether radiofrequency ablation using hypertonic saline solution instillation can increase the extent of thermally mediated coagulation in ex vivo pig liver tissue. Methods Fifty-six radiofrequency ablation lesions were produced in fresh ex vivo pig’s liver. According to different saline solutions, the lesions were divided into six groups: 25% acetic acid, 18% NaCl, 10% NaCl, 5% NaCl, 0.9% NaCl, and distilled water. After radiofrequency ablation, the lesions size and morphology were measured and compared.Results Using different instillation, the volume of coagulation necrosis was different: 25% acetic acid >18% NaCl >10% NaCl >5% NaCl >0.9% NaCl>distilled water. Conclusion Radiofrequency ablation using hypertonic saline solution instillation can increase the volume of radiofrequency ablation induced necrosis.
文摘AIM To test the safety and effectiveness of hypertonic saline solution(HSS + F) as a strategy for weight loss andprevention of further deterioration of renal function.METHODS Patients admitted with acute decompensated heart failure(ADHF) who received HSS + F were included in the study. After a period of a standard ADHF treatment, our patients received an intravenous infusion of furosemide(250 mg) combined with HSS(150 mL of 3% NaCl) twice a day for a mean duration of 2.3 d. Our primary outcomes were weight loss and a change in serum creatinine per day of treatment. The parameters of the period prior to treatment with HSS + F were compared with those of the period with HSS + F. RESULTS A total of 47 patients were included. The mean creatinine on admission was 155 μmol/L ± 65 μmol/L, the ejection fraction was 40% ± 17%. The experimental treatment(HSS + F) resulted in greater weight loss per day of treatment than the standard treatment(-1.4 kg/d ± 1.4 kg/d vs-0.4 kg/d ± 1.0 kg/d, P = 0.0168). Importantly, the change in creatinine was not significantly different.CONCLUSION This study supports the effectiveness of HSS + F on weight loss in patients with ADHF. The safety profile, particularly with regard to renal function, leads us to believe that HSS + F may be a valuable option for those patients presenting with ADHF who do not respond to conventional treatment with intravenous furosemide alone.
文摘Objective: To study the effect of hypertonic saline solution on the left ventricular functions of isolated hearts from burned rats. Methods: Thirty six Wistar rats were used and divided into 4 groups: (1) normal hearts perfused with isotonic Krebs Henseleit solution; (2) normal hearts perfused with Krebs Henseleit solution which contained 215 mmol/L Na +; (3) hearts of rats suffered from 25% TBSA third degree burn and perfused with isotonic Krebs Henseleit solution; (4) hearts of the burned rats perfused with Krebs Henseleit solution which contained 215 mmol/L Na +. The systolic and diastolic functions of the left ventricle were observed.Results: During perfusion, there were very short periods of decrease in heart systolic and diastolic functions at first, but they recovered very soon and even became stronger than normal both in the normal and burned rats. The systolic and diastolic functions of the hearts increased very significantly when the perfusion solution was changed to isotonic solution from the hypertonic solutions. The effect of the hypertonic saline solution on the ventricular systolic and diastolic improvements was stronger in the hearts of the burned rats than that in the normal hearts. Conclusions: Hypertonic saline solution can directly affect myocardium and significantly improve the ventricular systolic and diastolic functions, especially in the hearts of the burned rats.
基金supported by the Zhejiang Provincial Natural Science Foundation of China (No.Y2100430)the Zhejiang Provincial Education and Research Foundation of China (No. Y201019154)
文摘To compare the early effects of hypertonic and isotonic saline resuscitation on heme oxygenase-1 (HO-1) expression in organs of rats with hemorrhagic shock. Rats were randomly divided into hypertonic saline resuscitation (HTS), normal saline resuscitation (NS) and sham groups. HO-1 mRNA, protein expression and apoptosis were evaluated in organs. In the HTS group, significant difference was noted in HO-1 protein in small intestinal mucosa and liver compared with the NS and sham groups, and in HO-1 mRNA in liver and kidney compared with the sham group. The apoptosis of small intestinal mucosa, liver, heart, and lung was significantly lower in the HTS group than that in the NS group. In this study, small volume resuscitation with HTS can efficiently up-regulate the expression level of HO-1 in small intestinal mucosa and liver, which may be one of the mechanisms alleviating organ damage.
文摘A new simulation system for the laboratory investigation of fretting wear is developed. It consist of a mechanism device, a electrochemical cell and a datum acqulsition and process software. Fretting of surgical 316L stainlesssteel in saline is studied. The results show that electrochemical corrosion is enhanced by fretting and anodic currentdensity under fretting is 100 times than static condition. Fretting corrosion is a mechanic -elec trochemical al Process.
基金Supported by Grant 2359.2012.7 of the President of the Russian Federation for the Support of Leading Scientific Groups
文摘AIM:To investigate the effect of local intestinal perfusion with hypertonic saline(HTS) on intestinal ischemia-reperfusion injury(IRI) in bothex vivo andin vivo rat models.METHODS:All experiments were performed on male Wistar rats anesthetized with pentobarbital sodium given intraperitoneally at a dose of 60 mg/kg.Ex vivo vascularly perfused rat intestine was subjected to 60-min ischemia and either 30-min reperfusion with isotonic buffer(controls),or 5 min with HTS of 365 or 415 mOsm/L osmolarity(HTS 365mOsm or HTS 415mOsm,respectively) followed by 25-min reperfusion with isotonic buffer.The vascular intestinal perfusate flow(IPF) rate was determined by collection of the effluent from the portal vein in a calibrated tube.Spontaneous intestinal contraction rate was monitored throughout.Irreversible intestinal injury or area of necrosis(AN) was evaluated histochemically using 2.3.5-triphenyltetrazolium chloride staining.In vivo,30-min ischemia was followed by either 30-min blood perfusion or 5-min reperfusion with HTS 365mOsm through the superior mesenteric artery(SMA) followed by 25-min blood perfusion.Arterial blood pressure(BP) was measured in the common carotid artery using a miniature pressure transducer.Histological injury was evaluated in both preparations using the Chui score.RESULTS:Ex vivo,intestinal IRI resulted in a reduction in the IPF rate during reperfusion(P < 0.05 vs sham).The postischemic recovery of the IPF rate did not differ between the controls and the HTS 365mOsm group.In the HTS 415mOsm group,postischemic IPF rates were lower than in the controls and the HTS 365mOsm group(P < 0.05).The intestinal contraction rate was similar at baseline in all groups.An increase in this parameter was observed during the first 10 min of reperfusion in the control group as compared to the sham-treated group,but no such increase was seen in the HTS 365mOsm group.In controls,AN averaged 14.8% ± 5.07% of the total tissue volume.Administration of HTS 365mOsm for 5 min after 60-min ischemia resulted in decrease in AN(5.1% ± 1.20% vs controls,P < 0.01).However,perfusion of the intestine with the HTS of greater osmolarity(HTS 415mOsm) failed to protect the intestine from irreversible injury.The Chiu score was lower in the HTS 365mOsm group in comparison with controls(2.4 ± 0.54 vs 3.2 ± 0.44,P = 0.042),while intestinal perfusion with HTS 415mOsm failed to improve the Chiu score.Intestinal reperfusion with HTS 365mOsm in the in vivo series secured rapid recovery of BP after its transient fall,whereas in the controls no recovery was seen.The Chiu score was lower in the HTS 365mOsm group vs controls(3.1 ± 0.26 and 3.8 ± 0.22,P = 0.0079 respectively,),although the magnitude of the effect was lower than in the ex vivo series.CONCLUSION:Brief intestinal postischemic perfusion with HTS 365mOsm through the SMA followed by blood flow restoration is a protective procedure that could be used for the prevention of intestinal IRI.
文摘AIM: To investigate the effects of 7.5% hypertonic saline on positive fluid balance and negative fluid balance, after radical surgery for gastrointestinal carcinoma. METHODS: Fifty-two patients with gastrointestinal carcinoma undergoing radical surgery were studied. The patients were assigned to receive either Ringer lactate solution following 4 mL/kg of 7.5% hypertonic saline (the experimental group, n = 26) or Ringer lactate solution (the control group, n = 26) during the early postoperative period in SICU. Fluid infusion volumes, urine outputs, fluid balance, body weight change, PaO2/FiO2 ratio, anal exhaust time as well as the incidence of complication and mortality were compared between the two groups. RESULTS: Urine outputs on the operative day and the first postoperative day in experimental group were significantly more than in control group (P<0.000001, P=0.000114). Fluid infusion volumes on the operative day and the first postoperative day were significantly less in experimental group than in control group (P= 0.000042, P= 0.000415). The volumes of the positive fluid balance on the operative day and during the first 48 h after surgery, in experimental group, were significantly less than in control group (P<0.000001). Body weight gain post-surgery was significantly lower in experimental group than in control group (P<0.000001). The body weight fall in experimental group occurred earlier than in control group (P<0.000001). PaO2/FiO2 ratio after surgery was higher in experimental group than in control group (P= 0.000111). The postoperative anal exhaust time in experimental group was earlier than in control group (P= 0.000006). The overall incidence of complications and the incidence of pulmonary infection were lower in experimental group than in control group (P= 0.0175, P= 0.0374). CONCLUSION: 7.5% hypertonic saline has an intense diuretic effect and causes mobilization of the retained fluid, which could reduce fluid infusion volumes and positive fluid balance after radical surgery for gastrointestinal carcinoma, as well as, accelerate the early appearance of negative fluid balance after the surgery, improve the oxygen diffusing capacity of the patients' alveoli, and lower the overall incidence of complications and pulmonary infection after the surgery.
文摘AIM: To investigate the effects of hypertonic saline in the neurocritical care population.METHODS: We retrospectively reviewed our hospital's use of hypertonic saline(HS) since March of 2005, and prospectively since October 2010. Comparisons were made between admission diagnoses, creatinine change(Cr), and HS formulation(3% Na Cl, 3% Na Cl/sodium acetate mix, and 23.4% Na Cl) to patients receiving normal saline or lactated ringers. The patients(n = 1329) of the retrospective portion were identified. The data presented represents the first 230 patients with data. RESULTS: Significant differences in Acute Physiology and Chronic Health Evaluation Ⅱ scores and GlasgowComa Scale scores occurred between different saline formulations. No significant correlation of Cl- or Na+ with Cr, nor with saline types, occurred. When dichotomized by diagnosis, significant correlations appear. Traumatic brain injury(TBI) patients demonstrated moderate correlation between Na+ and Cr of 0.45. Stroke patients demonstrated weak correlations between Na+ and Cr, and Cl- and Cr(0.19 for both). Patients receiving HS and not diagnosed with intracerebral hemorrhage, stroke, subarachnoid hemorrhage, or TBI demonstrated a weak but significant correlation between Cl- and Cr at 0.29.CONCLUSION: Cr directly correlates with Na+ or Cl- in stroke, Na+ in TBI, and Cl- in other populations. Prospective comparison of HS and renal function is needed.
基金Supported by The United States Cystic Fibrosis Foundation and Science Foundation Ireland under the Research Frontiers Programme(11/RFP/BMT/3094)
文摘Cystic fibrosis(CF) is a multisystem disorder with significantly shortened life expectancy. The major cause of mortality and morbidity is lung disease with increasing pulmonary exacerbations and decline in lung function predicting significantly poorer outcomes. The pathogenesis of lung disease in CF is characterised in part by decreased airway surface liquid volume and subsequent failure of normal mucociliary clearance. This leads to accumulation of viscous mucus in the CF airway, providing an ideal environment for bacterial pathogens to grow and colonise, propagating airway inflammation in CF. The use of nebulised hypertonic saline(HTS) treatments has been shown to improve mucus clearance in CF and impact positively upon exacerbations, quality of life, and lung function. Several mechanisms of HTS likely improve outcome, resulting in clinically relevant enhancement in disease parameters related to increase in mucociliary clearance. There is increasing evidence to suggest that HTS is also beneficial through its anti-inflammatory properties and its ability to reduce bacterial activity and biofilm formation. This review will first describe the use of HTS in treatment of CF focusing on its efficacy and tolerability. The emphasis will then change to the potential benefits of aerosolized HTS for the attenuation of receptor mediated neutrophil functions, including down-regulation of oxidative burst activity, adhesion molecule expression, and the suppression of neutrophil degranulation of proteolytic enzymes.
文摘This study aimed to investigate whether a small volume of 7.2% hypertonic saline solution with 6% dextran 70 (HSD) is superior to mannitol in vasodilatation of encephalic vessels in the dogs using magnetic resonance imaging (MRI). Fifteen healthy 2.4 ± 0.9 year-old purpose-bred male Beagle dogs were assigned to receive 5 mL/kg of isotonic saline solution (ISS) as control, 20% mannitol or HSD infusion at a flow rate of 20 mL/kg/hours via right cephalic vein.Venous blood samples were collected immediately before fluid infusion (pre) and every 15 minutes until 120 minutes after the initiation of fluid infusion. Immediately after collection of each blood sample, T1 and T2-weighted magnetic resonance imaging recordings were undergone. Immediately after HSD infusion, the area of the cross-section of superior sagittal sinus was significantly greater than that of beagles in the other groups (p p < 0.001). Our results indicate that HSD induced a rapid and strong reduction in the area of the cross-section of CSF more than mannitol did. Therefore, it is suggested that 5 mL/kg of HSD might be superior to isovolume of mannitol in inducing vasodilatation in the dog.
基金Project supported by National Natural Science Foundation of China (51207027), Scien- tific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry of China.
文摘Electrical discharges in or in contact with liquid can produce H2O2effectively.However,wound treatment requires not only high energy yield,but also low temperature,stability,safety and reproducibility in H2O2generation.Thus a method of producing H2O2in saline solution reacting with He/H2O plasma jet is described in this paper.Two working modes(bullet and arc modes)are stable while keeping at low temperature in the H2O2production.The production is much faster under the arc mode,but has rather high production rate and energy efficiency under the bullet mode.Plus,the energy efficiency increases with treatment time and higher moist helium flow rate under both modes,but especially the bullet mode.Moreover,55 min after the plasma treatment,there is only 6%degradation of H2O2concentration in the saline solution,and this indicates the potential of He/H2O plasma jet in plasma pharmacy.
文摘Introduction: Chronic sinusitis affects all age groups and is a cause for significant morbidity. Recent realization that noninfectious inflammatory causes can predispose to infectious sinusitis has evoked renewed interest in developing and documenting efficacious ancillary therapies that could supplement antibiotic use. Hypertonic saline solution has been shown to increase mucociliary clearance and ciliary beat frequency. Objectives: A double blinded randomized comparative study was undertaken to evaluate the effect of hypertonic saline (3.5%) nasal drops and normal saline (0.9%) nasal drops, to assess the tolerance of hypertonic saline nasal drops and to know if hypertonic nasal drops improve the “quality of life” in patients with chronic sinusitis. Methods: Fifty patients diagnosed as chronic sinusitis in the age group of 18-45 years were randomized into two groups;Group A was treated with normal saline and Group B with 3.5% hypertonic saline for a period of 4 weeks. Pre and Post treatment x-rays of the paranasal sinuses (Water’s view) were graded and radiological scores were given accordingly. The symptoms were evaluated before and after treatment using visual analogue score. Patients were queried about tolerance to the nasal solution and scores were given. Conclusion: Hypertonic saline nasal solution is more efficacious than normal saline solution in the treatment of patients with chronic sinusitis. Hypertonic saline nasal solution was well tolerated and it improved quality of life in these patients.
文摘To investigate the effect of hypertonic saline / dextran 70 (HSD) on cardiac function in delayed resuscitation of burn shock. Methods: HSD was used for resuscitation 6 h postburn in dogs and its effect on cardiac function was evaluated byvolume load,MAP, LVSP,LVEDP, + dp/dtmax, -dp/dtmax, CO and SVR. Results: The volume of HSD was 30.50% less duringfirst 24 h postburn and 59.50% less during 4 h after resuscitation than that of lactated Ringer’s solution (LR’s). MAP, LVSP,LVEDP, + dp/dtmax, -dp/dtmax and CO increased and SVR reduced in HSD resuscitation. Conclnsion: Smaller volume of HSD canexpand plasma volume significantly and improve cardiac function in delayed resuscitation of burn shock.
文摘cyanoacrylate and a mixture of 72% chromated glycerinwith hypertonic glucose solution in management ofgastric varices.METHODS: Ninety patients with gastric varicespresented to Endoscopy Unit of Ain Shams UniversityHospital were included. They were randomly allocatedinto three groups; each group included 30 patients treatedwith intravariceal sclerosant injections in biweeklysessions till complete obturation of gastric varices;Group I (n-butyl-2-cyanoacrylate; Histoacryl?), GroupII (iso-amyl-2-cyanoacrylate; Amcrylate?) and GroupIII (mixture of 72% chromated glycerin; Scleremo?with glucose solution 25%). All the procedures wereperformed electively without active bleeding. Recruitedpatients were followed up for 3 mo.RESULTS: 26% of Scleremo group had bleeding duringpuncture vs 3.3% in each of the other two groups withsignificant difference, (P 〈 0.05). None of Scleremogroup had needle obstruction vs 13.3% in each of theother two groups with no significant difference, (P 〉0.05). Rebleeding occurred in 13.3% of Histoacryl andAmcrylate groups vs 0% in Scleremo group with nosignificant difference. The in hospital mortality was 6.6%in both Histoacryl and Amcrylate groups, while it was0% in Scleremo group with no significant difference. Inthe first and second sessions, the amount of Scleremoneeded for obturation was significantly high, while the amount of Histoacryl was significantly low. Scleremo was the less costly of the two treatments. CONCLUSION: All used sclerosant substances showed efficacy and success in management of gastric varices with no significant differences except in total amount,cost and bleeding during puncture.
文摘Objective: To find out the optimal concentration, infusion rate and dosage of saline for resuscitation.Methods: Forty five dogs were used to establish hypovolemic shock models. The dogs were resuscitated with saline of different concentrations and different dosages under different infusion rates, and the resuscitation results were compared. Results: The best concentration was 7.5 %, the best rate of infusion 20 ml/min (a volume equivalent to 15% of the shed blood) and the best dosage 5.71 ml/kg. The method was effective for resuscitation, the mean arterial pressure (MAP) could be elevated to 89% of the baseline, and this MAP could be kept for more than one hour. Conclusions: Using 7.5 % sodium chloride solution equivalent to 15% of the shed blood at an infusion rate of 20 ml/min can achieve a best resuscitation result.
文摘Background Massive blood loss due to trauma is the leading cause of death in trauma patients and military combatants. The fluid category of resuscitation for hypotensive trauma patients is open to debate. This study was conducted to investigate the early effects of hypertonic and isotonic saline solutions on heme oxygenase-1 (HO-1) mRNA expression and apoptosis in the intestinal mucosa of rats with hemorrhagic shock. Methods A model of severe hemorrhagic shock was established in 21 Sprague-Dawley rats. The rats were randomly divided into sham, normal saline resuscitation (NS), and hypertonic saline resuscitation (HTS) groups, with 7 in each group. We assessed and compared the HO-1 mRNA expression and apoptosis in the small intestinal mucosa of rats after hemorrhagic shock and resuscitation using the SYBR Green I fluorescence quantitative reverse transcriptase polymerase chain reaction, fluorescein-iso-thiocyanate-annexin V/propidium iodide double staining, and flow cytometry. Results In the early stage of hemorrhagic shock and resuscitation, marked apoptosis occurred in the small intestinal mucosa from both the NS and HTS groups. The apoptotic rate in the NS group was higher than that in the HTS group (P 〈0.01). Among the three groups, HO-1 mRNA mucosa from the HTS group had the highest level of expression; however, the differences were not significant. There was a significant negative correlation between HO-1 mRNA expression and apoptosis in the small intestinal mucosa from the NS and HTS groups after hemorrhagic shock and resuscitation. Conclusions In this rat model of severe hemorrhagic shock, HTS resuscitation with a small volume is more effective than NS resuscitation in reducing apoptosis of the intestinal mucosa. Further, HO-1 mRNA over-expression in the intestinal mucosa may be one of the molecular mechanisms of HTS in the resuscitation of hemorrhagic shock.
基金supported by the National Natural Science Foundation of China(Nos.51025830,41201498 and 51178360)
文摘Fenton oxidation is generally inhibited in the presence of a high concentration of chloride ions.This study investigated the feasibility of using benzoquinone(BQ) and hydroxylamine hydrochloride(HA) as Fenton enhancers for the removal of glycerin from saline water under ambient temperature by accelerating the ferric system.It was found that organics removal was not obviously affected by chloride ions of low concentration(less than 0.1 mol/L),while the mineralization rate was strongly inhibited in the presence of a large amount of chloride ions.In addition,ferric hydrolysis-precipitation was significantly alleviated in the presence of HA and BQ,and HA was more effective in reducing ferric ions into ferrous ions than HA,while the H_2O_2 decomposition rate was higher in the BQ-Fenton system.Electron spin resonance analysis revealed that OH production was reduced in high salinity conditions,while it was enhanced after the addition of HA and BQ(especially HA).This study provided a possible solution to control and alleviate the inhibitory effect of chloride ions on the Fenton process for organics removal.
文摘Compton scattering saline solution was researched. Firstly according to the Compton scattering theory the linear relationship between the concentration and the scattered photon counts was obtained. And then it was proved by Compton scattering experiments for some solutions. According to those experiments, it was found that the slope was decreased when the atomic number of the cation was increased for alkali metal chloride solutions and alkaline-earth metal chloride solutions. Based on those relationships, a new method was promoted with which to measure the concentration of saline solution untouched the measured solution.
文摘Abstract Objective To investigate the therapeutic effect of hypertonic saline (HS) and hypertonic saline with taurine (HST) hemorrhagic shock and hemorrhagic shock with hypernatremia rats. Methods Hypernatremic dehydration and hemorrhagic shock models were produced by Trachtma's and Krausz's methods in Sprague Dawley rats. Hemorrhagic changes of mean arterial blood pressure (MABP), left ventricular end diastolic pressure (LVEDP), ±dp/dtmax and heart rate (HR) were registered on polygraph. Plasma Na +, urea lactate and taurine content were assayed. Results After treatment with HS, the hemodynamic changes of hemorrhagic shock rats were significantly alleviated, and tissue fluid redistributed. When the hemorrhagic shock animals were treated with HS containing taurine (HST), in comparison with HS treatment, the hemodynamic improvement and hemodilution were more obvious. When the hemorrhagic animals complicated with hypernatremia were treated with HS, the symptoms of dehydration and shock further deteriorated, when the hemorrhage with hypernatremia animals were treated with an infusion of HST, the symptoms of dehydration and shock were significantly ameliorated. Conclusion The therapeutic effect of HS with taurine is obviously better than HS alone. So when hemorrhagic shock was complicated with hypernatremia, HS with taurine is recommended in stead of HS alone.