[Objective] This study was to realize high-density culture of Chlorella sp. as well as the culture with high lipid yield. [Method] Through analyzing the growth curve of Chlorella sp. cells, dextrose consumption curve,...[Objective] This study was to realize high-density culture of Chlorella sp. as well as the culture with high lipid yield. [Method] Through analyzing the growth curve of Chlorella sp. cells, dextrose consumption curve, change curves of pH and dissolved oxygen, a fed-batch culture was conducted, followed by a nitrogen-deficient culture aiming at accumulating the lipids in Chlorella sp. cells when a high density of Chlorella sp. cells was obtained. [Result] After four batches of feeding were pro- vided, the biomass of Chlorella sp. reached up to 65.25 g/L, and the lipid content increased from 42.75% to 63.82% in Chlorella sp. cells, with the yield of 43.37 g/L in the following 12 hours of nitrogen-deficient culture. [Conclusion] Reasonable fed- batch can significantly improve the biomass of Chlorella sp., and the nitrogen-defi- cient culture further raises the lipid yield of Chlorella sp.展开更多
We characterized humic acids （HAs） and glycerol-extractable organic fractions （GEOFs） extracted from four Andisols, taken from comparable soil-climate conditions on the east side of Mount Etna. The soils were form...We characterized humic acids （HAs） and glycerol-extractable organic fractions （GEOFs） extracted from four Andisols, taken from comparable soil-climate conditions on the east side of Mount Etna. The soils were formed on old lava （about 9000 years ago）, old tephra （about 8 700 years ago）, recent lava （about 2 600 years ago） and recent tephra （about 3600 years ago）. A part of the organic matter of the soils, deprived of HAs and fulvic acids （FAs）, was isolated by glycerol extraction. The GEOF can not be extracted with alkaline solutions, probably because it is closely bound to the mineral component of the soil. The characterization of the extracted organic fraction was carried out using elementary and functional group analysis and Fourier transform infrared （FT-IR） spectroscopy. About 20 extractions were necessary to extract the HA and FA from the older soils and about 10 extractions to extract them from the younger soils. Data showed that the CEOFs had a greater ash content and a smaller N content, as well as a greater presence of aliphatic compounds and carboxylic groups as compared to the HA extracted from the same soil. The GEOFs extracted from younger soils also had a lower yield, ash and COOH-group content, and were more aliphatic than the GEOF extracted from older soils. Finally, the GEOFs were more closely bound to the amorphous component of the soil （＇short-range＇ minerals） and consequently less subject to biodegradation.展开更多
In the present study, we investigated of the ethanol （Eth）, 2-phenylethanol （2-PE） and ethanol/2-phenylethanol （Eth/2-PE） stress tolerance and established relationship between stress tolerance and fatty acid com...In the present study, we investigated of the ethanol （Eth）, 2-phenylethanol （2-PE） and ethanol/2-phenylethanol （Eth/2-PE） stress tolerance and established relationship between stress tolerance and fatty acid compositions of wine yeast strain S. cerevisiae UCM Y-524 in relation to different cultivation factors. Changes in cell membrane fatty acid profiles studied under different temperature and media. The active oxygenation, semi-aerobic cultivation supplemented Tween 80 conditions were used in different combinations. The concentrations of 2-PE and Eth, the fatty acids methyl esters （FAMES） in the media were measured by GC-MS analyses. 2-PE, Eth, FAMES were identified by NIST02 MS database at the 2-PE and Eth standard solution （Merck, Germany）, bacterial FAMES standard （Supelco）. Palmitoleic and oleic acid were dominated for S. cerevisiae UCM Y-524. The unsaturated/saturated fatty acid （UFA/SFA） ratio was higher than five for S. cerevisiae UCM Y-524 at 14 ~C in simple medium and about more than three for other conditions. It has been found that yeast cells grown in the presence of the 2-PE, Eth and Eth/2-PE appear to increase the amount of unsaturated fatty acids, especially oleic acid, in cellular lipids especially under active oxygenation supplemented with Tween 80. S. cerevisiae UCM Y-524 has a higher tolerance under 2-PE, Eth and Eth/2-PE stress at 28 ~C in a simple medium under aerobic conditions. A higher concentration of unsaturated fatty acids in the membrane S. cerevisiae UCM Y-524 and a lower temperature under aerobic conditions, has been considered to have a positive influence on the excretion of 2-phenylethanol.展开更多
Objective To compare and rank the clinical effects of different acupuncture and related therapies on hyperlipidemia patients.Methods We used network meta-analysis(NMA)to evaluate direct and indirect effects in studies...Objective To compare and rank the clinical effects of different acupuncture and related therapies on hyperlipidemia patients.Methods We used network meta-analysis(NMA)to evaluate direct and indirect effects in studies of acupuncture and related therapies for hyperlipidemia.Databases PubMed,EMBASE,Cochrane Library,the China Biology Medicine(CBM),the China National Knowledge Infrastructure(CNKI),Wanfang Data and the Chinese Scientific Journal Database(VIP)were searched to collect randomized controlled trials(RCTs)of acupuncture and related therapies in the treatment of hyperlipidemia.The data were analyzed using Stata 15.0 and WinBUGS 1.4.3 software after two researchers independently screened the literature,extracted the data,and assessed the risk of bias in the included studies.Results We analyzed a total of 36 eligible studies that included 3124 patients,involving 12 types of acupuncture and related therapies and comprehensive therapies.The results of the NMA showed that:for the total cholesterol(TC),acupoint catgut embedding(ACE),simple acupuncture(ACU),acupoint injection(AI),electroacupuncture(EA),western medicine of statins(WM),and combination of acupuncture and related therapies(combined therapies)were all more effective than placebo(P<0.05).For triacylglycerol(TG),ACU,EA,warming acupuncture(WA),WM and combined therapies were better than placebo(P<0.05),while WA was better than Chinese herb(CH)(P<0.05).For low-density lipoprotein cholesterol(LDL-C),combined therapies were more effective than lifestyle modification(LM)(P<0.05).For high-density lipoprotein cholesterol(HDL-C),auricular acupoint stimulation(AAS),ACE,ACU,AI,CH,EA,LM,moxibustion(MOX),WM,combined therapies and placebo were all worse than WA(P<0.05),while WM and combined therapies were better than ACU(P<0.05).Combined ranking results suggest that ACU and combined therapies may be the optimal intervention.Conclusions The efficacy of all kinds of acupuncture-related therapies in patients with hyperlipidemia is better than lifestyle changes.However,for different outcome indicators,all kinds of acupuncture-related therapies have their advantages and disadvantages,and comprehensive ranking results suggest that ACU and combined therapies may be the optimal intervention.展开更多
Previous study has shown that 10-hydroxycamptothecin（HCPT） has well-established pharmacological effects in vitro.However,its in vivo bioavailability is very poor due to various problems,which severely restricts its ...Previous study has shown that 10-hydroxycamptothecin（HCPT） has well-established pharmacological effects in vitro.However,its in vivo bioavailability is very poor due to various problems,which severely restricts its clinical applications.In the present study,phospholipid complex（PC） technology was employed to improve the solubility and bioavailability of HCPT.XRD data confirmed the formation of HCPT-PC.However,our previously prepared HCPT-PC is too sticky,which may result in the slow dissolution rate and negative effects on its absorption.Therefore,we prepared HCPT-PC-solid dispersion（HCPT-PC-SD）and lipid-based formulations of HCPT-PC through simple preparation process.The results showed that the dissolution rate of HCPT-PC was effectively improved by solid dispersion technology,which reached 91.73%in 45 min.Pharmacokinetic study revealed that the AUC_（0-t） of HCPT-PC-SD and HCPT-PC lipid-based formulations was effectively further increased compared with HCPT-PC.Moreover,we found that the combination of SD technology and lipid-base formulations could be a promising drug-delivery system to improve the oral bioavailability of HCPT-PC.In addition,we showed that the bioavailability of HCPT-PC lipid-base formulations was even greater than that of HCPT-PC-SD.In particular,lipid-base formulations could be prepared just by a simple method,suggesting its feasibility of industrialization.展开更多
Objective： Studies have demonstrated that Tai Chi exercise improves blood lipid level with inconsistent results. A meta-analysis was conducted to quantify the effects of Tai Chi on blood lipid profiles in humans. Met...Objective： Studies have demonstrated that Tai Chi exercise improves blood lipid level with inconsistent results. A meta-analysis was conducted to quantify the effects of Tai Chi on blood lipid profiles in humans. Methods： We screened the databases of PubMed, EMBASE, Cochrane Library （Central）, Web of Science, China National Knowledge Infrastructure （CNKI）, Wanfang data, and Clinicaltrials.gov for randomized controlled trials with Physio- therapy Evidence Database （PEDro） score more than 3 points up to June 2015. Six studies involving 445 subjects were included. Most trials applied 12-week Tai Chi intervention courses. Results： In comparison with the control group, blood triglyceride （TG） level difference between follow-up and baseline was statistically significantly lower in the Tai Chi practicing group （weighted mean difference （WMD） -16.81 mg/dl; 95% confidence intervals （CI） -31.27 to -2.35 mg/dl; P=-0.02）. A trend to improving total cholesterol （TC） reduction was found with Tai Chi （WMD -7.96 mg/dl; 95% CI -17.30 to 1.39 mg/dl; P=-0.10）. However, no difference was found in blood low-density lipoprotein cholesterol （LDL-C） or high-density lipoprotein cholesterol （HDL-C）. Conclusions： Tai Chi exercise lowered blood TG level with a trend to decrease blood TC level. Our data suggest that Tai Chi has the potential to implement meaningful blood lipid modification and serve as an adjunctive exercise modality. The relationship between Tai Chi exercise regimen and lipid profile change might have a scientific priority for future investigation.展开更多
文摘[Objective] This study was to realize high-density culture of Chlorella sp. as well as the culture with high lipid yield. [Method] Through analyzing the growth curve of Chlorella sp. cells, dextrose consumption curve, change curves of pH and dissolved oxygen, a fed-batch culture was conducted, followed by a nitrogen-deficient culture aiming at accumulating the lipids in Chlorella sp. cells when a high density of Chlorella sp. cells was obtained. [Result] After four batches of feeding were pro- vided, the biomass of Chlorella sp. reached up to 65.25 g/L, and the lipid content increased from 42.75% to 63.82% in Chlorella sp. cells, with the yield of 43.37 g/L in the following 12 hours of nitrogen-deficient culture. [Conclusion] Reasonable fed- batch can significantly improve the biomass of Chlorella sp., and the nitrogen-defi- cient culture further raises the lipid yield of Chlorella sp.
基金Project supported by the Research Foundation of University of Catania, Italy (No. ORCT067410/2006)
文摘We characterized humic acids （HAs） and glycerol-extractable organic fractions （GEOFs） extracted from four Andisols, taken from comparable soil-climate conditions on the east side of Mount Etna. The soils were formed on old lava （about 9000 years ago）, old tephra （about 8 700 years ago）, recent lava （about 2 600 years ago） and recent tephra （about 3600 years ago）. A part of the organic matter of the soils, deprived of HAs and fulvic acids （FAs）, was isolated by glycerol extraction. The GEOF can not be extracted with alkaline solutions, probably because it is closely bound to the mineral component of the soil. The characterization of the extracted organic fraction was carried out using elementary and functional group analysis and Fourier transform infrared （FT-IR） spectroscopy. About 20 extractions were necessary to extract the HA and FA from the older soils and about 10 extractions to extract them from the younger soils. Data showed that the CEOFs had a greater ash content and a smaller N content, as well as a greater presence of aliphatic compounds and carboxylic groups as compared to the HA extracted from the same soil. The GEOFs extracted from younger soils also had a lower yield, ash and COOH-group content, and were more aliphatic than the GEOF extracted from older soils. Finally, the GEOFs were more closely bound to the amorphous component of the soil （＇short-range＇ minerals） and consequently less subject to biodegradation.
文摘In the present study, we investigated of the ethanol （Eth）, 2-phenylethanol （2-PE） and ethanol/2-phenylethanol （Eth/2-PE） stress tolerance and established relationship between stress tolerance and fatty acid compositions of wine yeast strain S. cerevisiae UCM Y-524 in relation to different cultivation factors. Changes in cell membrane fatty acid profiles studied under different temperature and media. The active oxygenation, semi-aerobic cultivation supplemented Tween 80 conditions were used in different combinations. The concentrations of 2-PE and Eth, the fatty acids methyl esters （FAMES） in the media were measured by GC-MS analyses. 2-PE, Eth, FAMES were identified by NIST02 MS database at the 2-PE and Eth standard solution （Merck, Germany）, bacterial FAMES standard （Supelco）. Palmitoleic and oleic acid were dominated for S. cerevisiae UCM Y-524. The unsaturated/saturated fatty acid （UFA/SFA） ratio was higher than five for S. cerevisiae UCM Y-524 at 14 ~C in simple medium and about more than three for other conditions. It has been found that yeast cells grown in the presence of the 2-PE, Eth and Eth/2-PE appear to increase the amount of unsaturated fatty acids, especially oleic acid, in cellular lipids especially under active oxygenation supplemented with Tween 80. S. cerevisiae UCM Y-524 has a higher tolerance under 2-PE, Eth and Eth/2-PE stress at 28 ~C in a simple medium under aerobic conditions. A higher concentration of unsaturated fatty acids in the membrane S. cerevisiae UCM Y-524 and a lower temperature under aerobic conditions, has been considered to have a positive influence on the excretion of 2-phenylethanol.
基金We thank for the funding support from the“Qihuang”Project on the Inheritance and Innovation of Traditional Chinese Medicine funded by National Administration of Traditional Chinese Medicine(No.284,2018).
文摘Objective To compare and rank the clinical effects of different acupuncture and related therapies on hyperlipidemia patients.Methods We used network meta-analysis(NMA)to evaluate direct and indirect effects in studies of acupuncture and related therapies for hyperlipidemia.Databases PubMed,EMBASE,Cochrane Library,the China Biology Medicine(CBM),the China National Knowledge Infrastructure(CNKI),Wanfang Data and the Chinese Scientific Journal Database(VIP)were searched to collect randomized controlled trials(RCTs)of acupuncture and related therapies in the treatment of hyperlipidemia.The data were analyzed using Stata 15.0 and WinBUGS 1.4.3 software after two researchers independently screened the literature,extracted the data,and assessed the risk of bias in the included studies.Results We analyzed a total of 36 eligible studies that included 3124 patients,involving 12 types of acupuncture and related therapies and comprehensive therapies.The results of the NMA showed that:for the total cholesterol(TC),acupoint catgut embedding(ACE),simple acupuncture(ACU),acupoint injection(AI),electroacupuncture(EA),western medicine of statins(WM),and combination of acupuncture and related therapies(combined therapies)were all more effective than placebo(P<0.05).For triacylglycerol(TG),ACU,EA,warming acupuncture(WA),WM and combined therapies were better than placebo(P<0.05),while WA was better than Chinese herb(CH)(P<0.05).For low-density lipoprotein cholesterol(LDL-C),combined therapies were more effective than lifestyle modification(LM)(P<0.05).For high-density lipoprotein cholesterol(HDL-C),auricular acupoint stimulation(AAS),ACE,ACU,AI,CH,EA,LM,moxibustion(MOX),WM,combined therapies and placebo were all worse than WA(P<0.05),while WM and combined therapies were better than ACU(P<0.05).Combined ranking results suggest that ACU and combined therapies may be the optimal intervention.Conclusions The efficacy of all kinds of acupuncture-related therapies in patients with hyperlipidemia is better than lifestyle changes.However,for different outcome indicators,all kinds of acupuncture-related therapies have their advantages and disadvantages,and comprehensive ranking results suggest that ACU and combined therapies may be the optimal intervention.
基金Science and Technology Department of Henan province Fund Project(Grant No.144300510019)
文摘Previous study has shown that 10-hydroxycamptothecin（HCPT） has well-established pharmacological effects in vitro.However,its in vivo bioavailability is very poor due to various problems,which severely restricts its clinical applications.In the present study,phospholipid complex（PC） technology was employed to improve the solubility and bioavailability of HCPT.XRD data confirmed the formation of HCPT-PC.However,our previously prepared HCPT-PC is too sticky,which may result in the slow dissolution rate and negative effects on its absorption.Therefore,we prepared HCPT-PC-solid dispersion（HCPT-PC-SD）and lipid-based formulations of HCPT-PC through simple preparation process.The results showed that the dissolution rate of HCPT-PC was effectively improved by solid dispersion technology,which reached 91.73%in 45 min.Pharmacokinetic study revealed that the AUC_（0-t） of HCPT-PC-SD and HCPT-PC lipid-based formulations was effectively further increased compared with HCPT-PC.Moreover,we found that the combination of SD technology and lipid-base formulations could be a promising drug-delivery system to improve the oral bioavailability of HCPT-PC.In addition,we showed that the bioavailability of HCPT-PC lipid-base formulations was even greater than that of HCPT-PC-SD.In particular,lipid-base formulations could be prepared just by a simple method,suggesting its feasibility of industrialization.
文摘Objective： Studies have demonstrated that Tai Chi exercise improves blood lipid level with inconsistent results. A meta-analysis was conducted to quantify the effects of Tai Chi on blood lipid profiles in humans. Methods： We screened the databases of PubMed, EMBASE, Cochrane Library （Central）, Web of Science, China National Knowledge Infrastructure （CNKI）, Wanfang data, and Clinicaltrials.gov for randomized controlled trials with Physio- therapy Evidence Database （PEDro） score more than 3 points up to June 2015. Six studies involving 445 subjects were included. Most trials applied 12-week Tai Chi intervention courses. Results： In comparison with the control group, blood triglyceride （TG） level difference between follow-up and baseline was statistically significantly lower in the Tai Chi practicing group （weighted mean difference （WMD） -16.81 mg/dl; 95% confidence intervals （CI） -31.27 to -2.35 mg/dl; P=-0.02）. A trend to improving total cholesterol （TC） reduction was found with Tai Chi （WMD -7.96 mg/dl; 95% CI -17.30 to 1.39 mg/dl; P=-0.10）. However, no difference was found in blood low-density lipoprotein cholesterol （LDL-C） or high-density lipoprotein cholesterol （HDL-C）. Conclusions： Tai Chi exercise lowered blood TG level with a trend to decrease blood TC level. Our data suggest that Tai Chi has the potential to implement meaningful blood lipid modification and serve as an adjunctive exercise modality. The relationship between Tai Chi exercise regimen and lipid profile change might have a scientific priority for future investigation.
