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Effects of 1-methylcyclopropene and modified atmosphere packaging on fruit quality and superficial scald in Yali pears during storage 被引量:11
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作者 FENG Yun-xiao CHENG Yu-dou +2 位作者 HE Jin-gang LI Li-mei GUAN Jun-feng 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第7期1667-1675,共9页
The Yali pear(Pyrus bretschneideri Rehd.) is susceptible to superficial scald during prolonged cold storage and at shelf life. This study investigated the effects of 1-methylcyclopropene(1-MCP) and modified atmosp... The Yali pear(Pyrus bretschneideri Rehd.) is susceptible to superficial scald during prolonged cold storage and at shelf life. This study investigated the effects of 1-methylcyclopropene(1-MCP) and modified atmosphere packaging(MAP) on changes of fruit quality and superficial scald during cold storage and at shelf life in Yali pear. Compared with MAP, the combination of MAP and 1-MCP(MAP+1-MCP) treatment reduced the carbon dioxide and ethylene content inside the packaging bag. The 1-MCP, MAP, and MAP+1-MCP treatments reduced the superficial scald index, malondialdehyde content, O2^-· production rate and relative conductivity and inhibited the accumulation of α-farnesene and conjugated trienes in the peel. 1-MCP and MAP+1-MCP treatments maintained a higher phenolic content and enhanced the catalase and superoxide dismutase activities in the fruit, while reduced activities of lipoxygenase and polyphenol oxidase in the peel preceding the onset of superficial scald. Comprehensive analysis indicated that the MAP+1-MCP treatment is the most effective method tested for improving the quality of Yali pears during cold storage and at shelf life. 展开更多
关键词 PEAR 1-methycyclopropene modified atmosphere packaging superficial scald BROWNING
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Inhibitory Effects of 1-MCP and DPA on Superficial Scald of Dangshansuli Pear 被引量:4
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作者 HUI Wei NIU Rui-xue +1 位作者 SONG Yao-qiang LI De-ying 《Agricultural Sciences in China》 CAS CSCD 2011年第10期1638-1645,共8页
Dangshansuli pear is one of crisp pears and has a non-climacteric respiratory pattern. Dangshansuli pear fruits were treated with 1 000 or 2 000 μL L-1 diphenylamine (DPA) for 1 min, or with 0.5 μL L-1 1-methylcyc... Dangshansuli pear is one of crisp pears and has a non-climacteric respiratory pattern. Dangshansuli pear fruits were treated with 1 000 or 2 000 μL L-1 diphenylamine (DPA) for 1 min, or with 0.5 μL L-1 1-methylcyclopropene (l-MCP) for 12 h before cold storage at (2±0.5)℃ for up to 210 d. Incidences of superficial scald and related physiological indexes were investigated during storage. The results showed that superficial scald occurred in control fruit with a rate of over 90% after 210 d at cold storage plus 10 d at room temperature. Treatments with 1 000 and 2 000 μL L-1 DPA and 0.5 μL L-1 l-MCP inhibited the accumulation of a-farnesene, conjugated trienes, total phenolic contents, and malondialdehyde (MDA) during storage. The treatments also decreased leakage of cell membrane and the activity of polyphenol oxidase (PPO) in the peel. These results indicate that 1-MCP and DPA treatments inhibit and postpone the occurrence of superficial scald of Dangshansuli pears remarkably in cold storage and post-storage shelf life, respectively, while the mechanisms were different. The results above may provide a theoretical evidence for the agriculture production. 展开更多
关键词 1-MCP DIPHENYLAMINE PEAR superficial scald
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Review of the initial treatment and avoidance of scald injuries 被引量:1
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作者 Ryan T Bourdon Brittany B Nelson-Cheeseman John P Abraham 《World Journal of Dermatology》 2017年第2期17-26,共10页
Scald injuries,which describe burns to living tissue from hot liquids,are a very common injury that occur across geographical,social,economic,and national boundaries.Despite their ubiquitous nature,a complete understa... Scald injuries,which describe burns to living tissue from hot liquids,are a very common injury that occur across geographical,social,economic,and national boundaries.Despite their ubiquitous nature,a complete understanding of the conditions which are required to cause scald burns is not yet available.In addition,clear guidance to medical practitioners is available through various guidelines however in actual situations,the extent of the burn is not fully known and this lack of knowledge complicates care.Here,a comprehensive review is made of the available knowledge of temperatures and scald durations which lead to skin-burn injuries.The range of volumes and liquid temperatures are typical of those found in heated consumer beverages.This review can help medical practitioners design initial treatment protocols and can be used by manufacturers of hot-liquid products to avoid the most severe burns.Next,within the context of this ability to quantify burn depths,a review of current burn treatment guidelines is given.Included in this review is a visual recognition of the extent of burns into the dermal layer as well as decision guidelines for selection of patients which would benefit from referral to a dedicated burn center.It is hoped that by bringing together both the quantified burn-depth information and current treatment guidelines,this review can be used as a resource for persons in the medical,manufacturing,beverage service,and other industries to reduce the human impact of scald injuries. 展开更多
关键词 scald injury SKIN BURNS Biological heating Hot beverages BURN depth
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Effect of nonpeptide NK1 receptor antagonist L-703,606 on the edema formation in rats at early stage after deep partial-thickness skin scalding
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作者 Ke Tao Hong-Tao Wang +5 位作者 Bi Chen Bo-Tao Wang Zhi-Yuan Li Xiong-Xiang Zhu Chao-Wu Tang Da-Hai Hu 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2013年第5期387-394,共8页
Objective:To investigate the effect and the relevant potential mechanism of nonpeptide neurokinin 1(NK1) receptor antagonist L-703,606 in the edema formation after burn injury. Method:1.-703,606 treatment was performe... Objective:To investigate the effect and the relevant potential mechanism of nonpeptide neurokinin 1(NK1) receptor antagonist L-703,606 in the edema formation after burn injury. Method:1.-703,606 treatment was performed in Sprague-Dawley(SD) rats at early stage after deep partial-thickness skin scalding.One hundred and fifty two adult male SI) rats were used in the study and randomly divided into sham scald(SS,n=8),scald control(SC,n=48),and L-703,606 treatment(IT,n=48) groups.The rats in SC and LT groups were subjected to 20%total body surface area(TBSA) deep partial-thickness skin scalding.Modified Evans blue extravasation, tracing electron microscopy by lanthanum nitrate and mean water content assay were employed to observe and detect the changes of vascular permeability,ultrastructure and edema formation in adjacent tissue to the wounds and in the jejuna of rats at early stage(72 h) after scald.Results: The pathological increase of vascular permeability in the periwound tissue and jejunum of rats in LT group were significantly lower than that in SC group(P【0.01),and recuperated earlier. Meanwhile,the changes of water contents of corresponding tissues in LT group were lighter than those in SC group(P【0.01).The ultrastructural changes of the microvessels in the peri-wound tissue of LT group showed that the junctions between microvascular endothelium cells were more narrow than those of SC group,moreover,and the number of opening and the engorgement and cavitation of the vascular endothelium cells decreased,the areosis and edema in perivascular tissue lightened,and the precipitation of the high eletron density lanthanum tracing agent in the interspace of the tissue decreased significantly in LT group.Conclusions:It is concluded that nonpeptide NK1-receptor antagonist L-703,606 could lighten the vascular permeability and edema formation in the periwound tissue and jejunum,and accelerate the normalization process of pathological changes in the tissues of rats after scald. 展开更多
关键词 Nonpeptide NK1-receptor ANTAGONIST L-703 606 scald EDEMA Vascular permeability ULTRASTRUCTURE Substance P
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Changes of Selenium Metabolism Glutathione Peroxidase Activity and Lipid Peroxides Content in Severely Scalding-injured Rats
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作者 刘泽军 董燕麟 《Journal of Medical Colleges of PLA(China)》 CAS 1989年第3期213-216,共4页
The changes of sclenium metabolism, glutathione peroxidase activity and lipid peroxidescontent in the tissues of rats suffering from 30% TBSA full thickness scalding were observed in thefirst 7 days after injury. It w... The changes of sclenium metabolism, glutathione peroxidase activity and lipid peroxidescontent in the tissues of rats suffering from 30% TBSA full thickness scalding were observed in thefirst 7 days after injury. It was found that selenium content in the rat tissues decreased remarkably af-ter injury, which in turn resulted in serious reduction of glutathione peroxidasc activity and significantincrease of lipid peroxides in the scrum, crythrocytcs and liver. However the muscular tissue showedno significant changes. These facts imply that after burn injury, the body is in a state of selenium deficiency, the lossof selenium might be responsible for the reduction of anti - peroxidation ability of glutathioneperoxidase, and conscqucntly there is an increase of lipid peroxides in the tissues. Only the musculartissue is insensitive to lipid peroxidation. It is believed that the reduction of anti-peroxidation abilityof glutathione peroxidasc after bum injury might be one of the main causes to intensify, the injury re-suiting from free radicals. 展开更多
关键词 SELENIUM METABOLISM GLUTATHIONE PEROXIDASE lipid peroxide scaldING injury rat
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Changes of Liver Microsomal Drug-metabolizing System and Lipoperoxidation Activity in Scalded Rats and the Effects of Silybin
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作者 谢京儿 廖锡麟 《Journal of Medical Colleges of PLA(China)》 CAS 1989年第3期243-247,共5页
The dynamic changes of liver microsomal drug-metabolizing system (MDMS) andlipoperoxidation were studied in scalded rats. The effects of treatment with vitamin E and silybinwere also evaluated. The results showeed tha... The dynamic changes of liver microsomal drug-metabolizing system (MDMS) andlipoperoxidation were studied in scalded rats. The effects of treatment with vitamin E and silybinwere also evaluated. The results showeed that liver microsomal cytochrome P-450 content, and p-nitroanisole demethylase (P-NOD) and aniline hydroxylase (AH) activity decreased markedlypostburn. On the contrary, liver lipoperoxide and mierosomal lipoperoxidation increased significantlyafter scalding. Both the increase of liver lipoperoxide and mierosomal lipoperoxidation and the de-crease of MDMS activity were prevented by vitamin E and silybin treatments. 展开更多
关键词 LIVER microsome DRUG metabolizing system LIPOPEROXIDATION scaldING RATS
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STAPHYLOCOCCAL SCALDED SKIN SYNDROME: RETROSPECTIVE ANALYSIS OF 82 CASES 被引量:1
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作者 姜嫒芳 张定国 《Journal of Shanghai Second Medical University(Foreign Language Edition)》 2006年第1期51-54,共4页
Objective To explore distinctive clinical manifestations and appropriate treatment, and assess prognosis of staphylococcal scalded skin syndrome (SSSS). Methods A retrospective analysis was conducted of the data of ... Objective To explore distinctive clinical manifestations and appropriate treatment, and assess prognosis of staphylococcal scalded skin syndrome (SSSS). Methods A retrospective analysis was conducted of the data of 82 cases of SSSS hospitalized at Xinhua Hospital during the period from May 1993 to September 2003. Results The disease in all the 82 patients occurred in their first decade (mean 2.5 years). Possible predisposing factors were found in 48 (58. 5% ). Fever was present in 78 (95. 1% ). Radial spokes of crusting around mouth were present in 80 ( 97. 6% ). Erythema began on the face, especially around the mouth and eye in 63 ( 76. 8% ). The course was acute in all cases and the eruptions quickly spread to the whole body within one day to two days. Of the 82 cases of SSSS, 47 were complete form of SSSS, 27 were abortive form of SSSS, and 8 were between the two forms. Staphylococcus aureus with positive staphylocoagulase was isolated from the possible primary infection sites including pharynx, eyelid, conjunctiva, nose, ear, and skin in 18 of 31 patients. Microbiological cultures of bullae and little pustulae developed after the onset were negative in 16 cases. All the 82 patients completely recovered after receiving antibiotic therapy ( ceftriaxone, oxacillin) alone or in combination with human immunoglobulin (IVIG) therapy. Additional IVIG therapy was used in those patients who had systemic involvements such as pneumonia, fever higher than 38. 5℃ or leukocytosis. Conclusion SSSS is a spectrum disease. Besides abortive and complete forms, presenting between the two forms a new form might be appeared in 8 cases who developed both scarlatiniform rash and flaccid bullae. The abortive form and complete form are usually misdiagnosed clinically. Radial spokes of crusting around mouth seem to be characteristic manifestation of SSSS. All the patients in this study had favorable prognosis after receiving prompt diagnosis and appropriate treatment. 展开更多
关键词 staphylococcal scalded skin syndrome diagnosis treatment prognosis
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The role of interleukin-6 in protein degradation of skeletal musclesearly after severe scalding in mice
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作者 李书武 董燕麟 《Journal of Medical Colleges of PLA(China)》 CAS 1999年第1期48-51,共4页
Objective:To observe the dynamic changes of interleukin--6(IL--6) and its effects on catabolism ofthe skeletal muscle protein in the early stage after scalding. Methods: After a model of Balb/C mice inflictedwith 18%-... Objective:To observe the dynamic changes of interleukin--6(IL--6) and its effects on catabolism ofthe skeletal muscle protein in the early stage after scalding. Methods: After a model of Balb/C mice inflictedwith 18%-- 20% TBSA full--thickness skin scald on the back and one hindleg was established, the proteincatabolic rate (TNR) and the level of 11.M6 in soleus muscle and serum were determined and the effects of IL6 on TNR of normal mice and those of 11.--6 antiserurn on TNR of the scalded mice wee observed during thefirst week after scalding. Results: The level of IL--6 was significantly increased and maintained during thefirst three days. TNR of the scalded leg was elevated to the peak on the 3rd day and then decreased graduallywhile that of the unscalded leg was increased only on the 2nd day after scalding. TNR was significantlyincreased when IL--6 was injected to the normal mice and IL--6 antiserum could significantly inhibit the. increased TNR of the scalded mice when it was injected intraperitoneally. Conclusion: The increase of IL--6 isrelated with local inflammatory response in the early stage after scalding and the high level of IL--6 canincrease the catabolic rate of muscle protein. 展开更多
关键词 Interleukin--6 (IL--6 ) TYROSINE release scaldING SOLEUS MUSCLE mouse
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Effects of insulin receptor tyrosine protein kinase on insulin resistance after scalding in rats
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作者 毛旭虎 许霖水 《Journal of Medical Colleges of PLA(China)》 CAS 1996年第4期290-293,共4页
After the rats were inflicted with 30% TBSA full thickness scalding on their back, the changes of insulin receptor tyrosine protein kinase (IRTPK) were studied on the 4th day postscalding with the phosphorylation of ... After the rats were inflicted with 30% TBSA full thickness scalding on their back, the changes of insulin receptor tyrosine protein kinase (IRTPK) were studied on the 4th day postscalding with the phosphorylation of exogenous substrates stimulated with hepatic and muscular plasma membrane in order to explore the possible molecular mechanism of insulin resistance after thermal injury. It was found that insulin resistance appeared in the early stage postscalding while the basic value of phosphorylation of exogenous substrates stimulated with hepatic and muscular plasma membrane was increased and the activity of IPTPK to insulin stimulation was greatly suppressed as compared with the control. These facts suggest that the impaired responses of IRTPK to insulin stimulation may affect the down-stream signal transmission of the insulin receptors and then the signal coupling pathwayfor glucose transmembranous transportation and glycogen synthesis mediated by IRTPK is obstructed and insulinresistance develops. 展开更多
关键词 scaldING INSULIN RECEPTOR TYROSINE PROTEIN KINASE INSULIN resistance rats
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Changes of the binding capacity of insulin receptors and activities of adenylate cyclase in hepatocytes after scalding in rats
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作者 徐爱民 许霖水 《Journal of Medical Colleges of PLA(China)》 CAS 1994年第1期13-16,共4页
In order to investigate the effects of transmembranous conduction of signals on insulin resistance after scalding,the changes of the binding capacity of insulin receptors in the cell membrane of hepatocytes and the ac... In order to investigate the effects of transmembranous conduction of signals on insulin resistance after scalding,the changes of the binding capacity of insulin receptors in the cell membrane of hepatocytes and the activities of adenylate cyclase were observed in rats after they were inflicted with 30% TBSA full thickness scalding. It was found that the maximum binding capacity of insulin receptors was significantly decreased after scalding but the average affinity increased. The sensitivity of insulin inhibition on the activity of adenylate cyclase was significantly reduced but there was no apparent difference of the maximum inhibition activity. These findings suggest that the impairment of transmembranous conduction of insulin signals across the cell membrane of hepatocytes after scalding can result in abnormal metabolism of glucose and consequently insulin resistance. 展开更多
关键词 scaldING INSULIN receptor ADENYLATE CYCLASE INSULIN resistance RATS
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Scald Burns in Children. An Analysis with Special Attention to the Roma Ethnic Group in East Slovakia
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作者 Eugen Frisman Oliver Rácz +2 位作者 Jozefina Petrovicová Ján Slávik Iveta Cimboláková 《International Journal of Clinical Medicine》 2015年第1期44-49,共6页
Objectives: A retrospective analysis of scald burns in children in a region with a significant prevalence of Roma ethnicity living in poor socioeconomic situation. Patients: During 3 year period 273 children were admi... Objectives: A retrospective analysis of scald burns in children in a region with a significant prevalence of Roma ethnicity living in poor socioeconomic situation. Patients: During 3 year period 273 children were admitted to the Clinic of Burns and Reconstructive Surgery of our hospital;201 of them were with scald burns accounting for 73.6% of all pediatric burn admissions. More than half (58.7%) of the 201 children with scald burns were of Roma ethnicity. Results: The average BSAB of the children with scald burns was 10.8%;mean length of hospital stay 11.5 days. 58.7% of the children with scald burns was of Roma ethnicity. The non-scald admissions of children had a similar pattern but these children were older and with an even higher prevalence of Roma patients (75%), a slightly lower average BSAB (9.8%) and a significantly longer need of hospital treatment (average 15.7 days). Conclusion: The frequency of scald burn injuries in very young Roma children in our region is very high. Prevention of scald burns is possible only through targeted and well-organized education of this vulnerable population. 展开更多
关键词 scald BURNS PEDIATRIC BURNS ROMA ETHNICITY
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The Quarantine Disease Sugarcane Leaf Scald Found in Xinping Sugarcane Area in Yunnan Province
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作者 Jiarong PU Changmi WANG +6 位作者 Jinan PU Rongyue ZHANG Zhaogui YANG Xiaoyan WANG Hongli SHAN Xiaoyan CANG Yingkun HUANG 《Agricultural Biotechnology》 CAS 2021年第3期87-88,93,共3页
[Objectives]This study was conducted to clarify the pathogens causing suspected sugarcane leaf scald symptoms in sugarcane plants found in the Xinping sugarcane area of Yunnan in 2019.[Methods]The XAF1/XAR1 specific p... [Objectives]This study was conducted to clarify the pathogens causing suspected sugarcane leaf scald symptoms in sugarcane plants found in the Xinping sugarcane area of Yunnan in 2019.[Methods]The XAF1/XAR1 specific primers of Xanthomonas albilineans were used to detect 8 suspected samples from Xinping County,Yunnan Province.[Results]The specific band 600 bp in size was detected.The sequencing results showed that the sequences detected were all 608 bp,and were 100%identical.The BLAST search results showed that the obtained sequence was 100%identical to the nucleotide sequence of X.albilineans GPE PC73 strain(GenBank accession number:FP565176)from France,and they were located in the same branch of the phylogenetic tree.According to the field symptom diagnosis and molecular identification results,the sugarcane disease in Xinping,Yunnan was confirmed to be the quarantine disease sugarcane leaf scald caused by X.allbilineasn.[Conclusions]The pathogens were identified by molecular biological identification methods,providing a scientific basis for the prevention and control of leaf scald disease in the future. 展开更多
关键词 Yunnan Province Xinping County Sugarcane leaf scald BLAST comparison Phylogeny
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Measurement of β-1,3 Glucanase Activity in Permeabilized Discs of Leaves of Healthy and Scald-Diseased Plants
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作者 Rocio Santiago Ana-Maria Millanes +1 位作者 Maria-Estrella Legaz Carlos Vicente 《Journal of Life Sciences》 2012年第2期175-181,共7页
Leaf discs of five cultivars of sugarcane exhibiting different degree of susceptibility to leaf scald were used to measure β-1,3 glucanase activity before and after experimental infection with Xanthomonas albilineans... Leaf discs of five cultivars of sugarcane exhibiting different degree of susceptibility to leaf scald were used to measure β-1,3 glucanase activity before and after experimental infection with Xanthomonas albilineans. Leaf discs were permeabilized with iso-propanol to facilitate the uptake of the enzyme substrate by intact tissues and to improve the enzyme assay. Bacterial infection significantly enhances β-1,3 glucanase activity of sensitive cultivars whereas significantly decreased that of the resistant one. Low concentrations of salicylate increase the hydrolase activity whereas jasmonic acid do not act as an elicitor of the enzyme and β-1,3 glucanase, such as laminarin, significantly inhibits the production of β-1,3 glucanase. Thus, the enzyme must be considered as a sensitivity factor induced by the pathogen. 展开更多
关键词 ELICITORS β-1 3 glucanase leaf scald SALICYLATE jasmonic sugarcane.
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Neonatal Staphylococcal Scalded Skin Syndrome:A Case Report
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作者 Yuan-Xia Zou Jia-Yu Zhang +3 位作者 Xiao-Xiu Ye Hui Zhou Run Li Gui-Ping Li 《TMR Integrative Nursing》 2021年第3期115-119,共5页
Objective:To summarize the clinical features,diagnosis,and treatment of neonatal staphylococcal scalded skin syndrome(SSSS).Methods:The clinical data with SSSS was analyzed,and the related literature was reviewed.Resu... Objective:To summarize the clinical features,diagnosis,and treatment of neonatal staphylococcal scalded skin syndrome(SSSS).Methods:The clinical data with SSSS was analyzed,and the related literature was reviewed.Results:The acute onset of the disease was characterized by generalized erythema,epidermis exfoliation,skin non-touch,radial chapping around the mouth,and positive Nissl sign.The culture of binocular secretions and neck exudates showed Staphylococcus aureus and was diagnosed as SSSS.According to the results of drug sensitivity of secretions and exudates,vancomycin was selected for anti-infective treatment,and skincare and symptomatic support were given simultaneously.The child was cured and discharged after ten days of treatment.Conclusion:SSSS belongs to neonatal acute and critical illness.Improving etiological examination and timely targeted anti-infective treatment is the key to correct diagnosis and recovery. 展开更多
关键词 NEWBORN Staphylococcal scalded skin syndrome Staphylococcus aureus MASTITIS
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烫疗药提取工艺及质量标准提升研究
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作者 陈锋 黄蓓 +3 位作者 韦金彩 莫海涛 覃翔 梁国成 《中医药导报》 2024年第1期42-45,54,共5页
目的:优选烫疗药浸渍提取工艺,提升烫疗药质量标准。方法:以浸渍溶剂浓度、浸渍时间、浸渍温度、原料粉碎度为考察因素,以川续断皂苷Ⅵ含量和醇溶性浸出物为评价指标,通过L9(34)正交试验优选烫疗药最佳浸渍提取工艺;采用薄层色谱法(TLC... 目的:优选烫疗药浸渍提取工艺,提升烫疗药质量标准。方法:以浸渍溶剂浓度、浸渍时间、浸渍温度、原料粉碎度为考察因素,以川续断皂苷Ⅵ含量和醇溶性浸出物为评价指标,通过L9(34)正交试验优选烫疗药最佳浸渍提取工艺;采用薄层色谱法(TLC)对烫疗药中防风、大黄、姜黄进行定性鉴别;采用高效液相色谱(HPLC)法对川续断皂苷Ⅵ进行定量测定。结果:筛选的最佳浸提工艺为将烫疗药处方饮片粉碎成细粉碎度,以50%的乙醇为溶剂,室温下浸渍5 d;川续断皂苷Ⅵ在19.30715~154.45720μg/mL范围内呈良好的线性关系(r=0.9999),平均加样回收率为102.37%,RSD=1.48%(n=6);定性鉴别中防风、大黄、姜黄斑点清晰,分离效果较好,具有鉴别特征。结论:优选的浸提工艺稳定可行;所建立的质量控制方法稳定性及重现性良好,专属性较强,可作为烫疗药的质量控制依据。 展开更多
关键词 烫疗药 正交试验 高效液相色谱 薄层色谱
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Obstruction of the formation of granulation tissue leads to delayed wound healing after scald burn injury in mice 被引量:1
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作者 Yunxia Chen Xiaorong Zhang +9 位作者 Zhihui Liu Jiacai Yang Cheng Chen Jue Wang Zengjun Yang Lei He Pengcheng Xu Xiaohong Hu Gaoxing Luo Weifeng He 《Burns & Trauma》 SCIE 2021年第1期523-539,共17页
Background:Delayed wound healing remains a common but challenging problem in patients with acute or chronic wound following accidental scald burn injury.However,the systematic and detailed evaluation of the scald burn... Background:Delayed wound healing remains a common but challenging problem in patients with acute or chronic wound following accidental scald burn injury.However,the systematic and detailed evaluation of the scald burn injury,including second-degree deep scald(SDDS)and thirddegree scald(TDS),is still unclear.The present study aims to analyze the wound-healing speed,the formation of granulation tissue,and the healing quality after cutaneous damage.Methods:In order to assess SDDS and TDS,the models of SDDS and TDS were established using a scald instrument in C57BL/6 mice.Furthermore,an excisional wound was administered on the dorsal surface in mice(Cut group).The wound-healing rate was first analyzed at days 0,3,5,7,15 and 27,with the Cut group as a control.Then,on the full-thickness wounds,hematoxylin and eosin(H&E)staining,Masson staining,Sirius red staining,Victoria blue staining and immunohistochemistry were performed to examine re-epithelialization,the formation of granulation tissue,vascularization,inflammatory infiltration and the healing quality at different time points in the Cut,SDDS and TDS groups.Results:The presented data revealed that the wound-healing rate was higher in the Cut group,when compared with the SDDS and TDS groups.H&E staining showed that re-epithelialization,formation of granulation tissue and inflammatory infiltration were greater in the Cut group,when compared with the SDDS and TDS groups.Immunohistochemistry revealed that the number of CD31,vascular endothelial growth factor A,transforming growth factor-βandα-smooth muscle actin reached preferential peak in the Cut group,when compared with other groups.In addition,Masson staining,Sirius red staining,Victoria blue staining,Gordon-Sweets staining and stress analysis indicated that the ratio of collagen I to III,reticular fibers,failure stress,Young’s modulus and failure length in the SDDS group were similar to those in the normal group,suggesting that healing quality was better in the SDDS group,when compared with the Cut and TDS groups.Conclusion:Overall,the investigators first administered a comprehensive analysis in the Cut,SDDS and TDS groups through in vivo experiments,which further proved that the obstacle of the formation of granulation tissue leads to delayed wound healing after scald burn injury in mice. 展开更多
关键词 Burn wound healing Second-degree deep scald Third-degree scald RE-EPITHELIALIZATION Granulation tissue Healing quality
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Effects of shenmai injection on expression of TNF-α mRNA in peritoneal macrophages of scald mice
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作者 王润田 高潮 刘殿武 《Chinese Medical Journal》 SCIE CAS CSCD 2002年第2期293-295,共3页
Objective To explore the effect of shenmai injection (SI) on expression of TNF-α mRNA in peritoneal macrophages (pMΦs) of scald mice.Methods BALB/c mice were inflicted with 11% of body surface area Ⅲ degree scald... Objective To explore the effect of shenmai injection (SI) on expression of TNF-α mRNA in peritoneal macrophages (pMΦs) of scald mice.Methods BALB/c mice were inflicted with 11% of body surface area Ⅲ degree scald and injected intraperitoneally (ip) with SI daily for 5 days, and expression of TNF-α mRNA in pMΦs was determined by semi-quantitative RT-PCR.Results In scald mice, the expression of TNF-α mRNA in pMΦs increased significantly, but it was reduced obviously (P<0.01) after SI administration, while the livability was increased markedly (P<0.05).Conclusions For scald mice, the cause of death at early stage might be related to the high expression of TNF-α mRNA in pMΦs and the use of SI can decrease the death rate. 展开更多
关键词 scald · peritoneal macrophages · tumor necrosis factor-α · shenmai injection
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低密度聚乙烯内衬袋对‘富士’苹果贮藏品质及虎皮病的影响
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作者 李岑 李瑞 +2 位作者 赵琦琦 任小林 刘翠华 《保鲜与加工》 CAS 北大核心 2024年第11期1-11,21,共12页
为研究新型低密度聚乙烯(LDPE)内衬袋对‘富士’苹果贮藏品质和虎皮病发病情况的影响,以生产上常用的聚乙烯(PE)打孔内衬袋为对照,对比新型LDPE微孔内衬袋在(0±0.5)℃冷藏条件下对‘富士’苹果的影响。定期监测内衬袋微环境中的CO_... 为研究新型低密度聚乙烯(LDPE)内衬袋对‘富士’苹果贮藏品质和虎皮病发病情况的影响,以生产上常用的聚乙烯(PE)打孔内衬袋为对照,对比新型LDPE微孔内衬袋在(0±0.5)℃冷藏条件下对‘富士’苹果的影响。定期监测内衬袋微环境中的CO_(2)、O_(2)体积分数和乙烯含量,同时对果实品质指标及挥发性物质、酚类物质含量进行测定,并调查贮藏期间虎皮病发病情况。结果表明:与PE打孔内衬袋相比,LDPE内衬袋可以形成低氧高二氧化碳的微环境;苹果最早在冷藏150 d时出现虎皮病,LDPE组果实虎皮病发病指数低于PE组,货架7 d时LDPE组果实虎皮病发病率和发病指数均小于PE组;贮藏150 d时LDPE组果实失重率比PE组降低了0.48个百分点;LDPE内衬袋包装可提高果实的呼吸速率和乙烯释放速率,且对果实的质地、内在品质无不良影响;其还可促进苹果水杨酸、根皮苷等酚类物质积累;促进贮藏后期果皮挥发性物质中醇类含量的上升,延缓酯类尤其是丁酸戊酯、2-甲基丙酸丁酯和2-甲基乙酸丁酯含量的降低。综上,LDPE微孔内衬袋保鲜效果优于传统的PE打孔内衬袋,适合作为传统内衬袋的升级替换产品。研究结果可为企业规模化应用LDPE微孔内衬袋提供理论依据。 展开更多
关键词 ‘富士’苹果 LDPE微孔内衬袋 贮藏品质 虎皮病
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低温慢烫对淘汰蛋鸡去羽效果及胸肉过熟的影响
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作者 史家浩 徐幸莲 +6 位作者 朱纯 刘岳龙 李建超 黄祖芬 徐梦泽 刘磊 王鹏 《食品工业科技》 CAS 北大核心 2024年第17期40-47,共8页
本研究目的在于通过调整浸烫参数的方式减少淘汰蛋鸡在屠宰加工中的损失。以饲养日龄为400 d的淘汰蛋鸡作为研究对象,探究不同浸烫方式对其羽毛去除效果及皮下肌肉过熟程度的影响。分别设置三种温度和时间的浸烫组合:65℃-3 min(高温浸... 本研究目的在于通过调整浸烫参数的方式减少淘汰蛋鸡在屠宰加工中的损失。以饲养日龄为400 d的淘汰蛋鸡作为研究对象,探究不同浸烫方式对其羽毛去除效果及皮下肌肉过熟程度的影响。分别设置三种温度和时间的浸烫组合:65℃-3 min(高温浸烫,High Temperature Scald,HS)、60℃-4 min 20 s(中温慢烫,Middle Temperature Slow Scald,MSS)、58℃-4 min 20 s(低温慢烫,Low Temperature Slow Scald,LSS),并以未经浸烫的淘汰蛋鸡作为对照组。通过测定浸烫后去羽力(Feather Retention Force,FRF)及计数残留羽毛数量表征浸烫脱毛效果。通过测定肉色、测量过熟区域深度、DSC扫描、拉曼光谱扫描表征不同浸烫处理对皮下肌肉过熟程度。浸烫后淘汰蛋鸡HS组与LSS组羽毛去除效果无显著差异,MSS组去羽力与残留羽毛数量显著低于另外两处理组(P<0.05),两种残留羽毛计数结果显示采用长时间浸烫能够使毛根数量减少。浸烫后鸡胸肉L*值显著高于对照组(P<0.05),其中HS组L*值比LSS、MSS组分别显著高出5.33与4.75(P<0.05)。沿肌纤维方向切割鸡胸肉发现截面出现明显分层(白色肉与正常肉),HS组白色肉厚度相比LSS组与MSS显著增加。DSC结果显示虽然三种浸烫处理均会使淘汰蛋鸡胸肉肌球蛋白变性,但是HS组胸肉中肌浆蛋白或胶原蛋白以及肌动蛋白的变性程度均高于其他两处理组。蛋白质二级结构相对含量显示HS组胸肉蛋白质变性程度最高。综合羽毛去除效果结果与胸肉过熟结果,得到淘汰蛋鸡最适浸烫参数为:60℃-4 min 20 s。本研究在抑制浸烫中皮下肌肉过熟程度的同时提升了浸烫脱毛效果,为企业屠宰淘汰蛋鸡提供技术参考。 展开更多
关键词 淘汰蛋鸡 低温慢烫 去羽效果 肌肉过熟 蛋白变性
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中药抗休克合剂对严重烫伤大鼠早期肠损伤的影响
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作者 高欣 王沁澄 +4 位作者 赵杰 胡万萱 李兴照 胡德林 孙业祥 《中国烧伤创疡杂志》 2024年第3期190-195,共6页
目的观察在高渗盐溶液(HS)补液基础上应用中药抗休克合剂对严重烫伤大鼠早期肠损伤的影响。方法选取32只8周龄SD大鼠,按照随机数表法将其随机分为假伤组、LR组、HS600组、HS600+中药组,每组8只。假伤组大鼠建立假伤模型以及LR组、HS600... 目的观察在高渗盐溶液(HS)补液基础上应用中药抗休克合剂对严重烫伤大鼠早期肠损伤的影响。方法选取32只8周龄SD大鼠,按照随机数表法将其随机分为假伤组、LR组、HS600组、HS600+中药组,每组8只。假伤组大鼠建立假伤模型以及LR组、HS600组、HS600+中药组大鼠建立烫伤模型后,LR组大鼠采用乳酸钠林格注射液(LR)补液,HS600组大鼠采用600 mmol/L HS补液,HS600+中药组大鼠采用600 mmol/L HS补液+中药抗休克合剂灌胃。对比观察模型建立24 h后各组大鼠血Na^(+)浓度,血清炎症因子水平以及小肠组织氧化应激水平与p38丝裂原活化蛋白激酶(p38MAPK)通路活化程度。结果LR组大鼠血Na^(+)浓度明显低于假伤组、HS600组及HS600+中药组(q=14910、32211、30010,P均<0001),且HS600组与HS600+中药组无明显差异(q=2198,P=0130)。LR组、HS600组及HS600+中药组大鼠血清肿瘤坏死因子-α、白细胞介素-10、白细胞介素-18水平以及小肠组织中丙二醛水平和磷酸化p38MAPK与p38MAPK比值均明显高于假伤组(肿瘤坏死因子-α:q=16070、10810、7579,P均<0001;白细胞介素-10:q=15920、20210、23850,P均<0001;白细胞介素-18:q=12750、7562、3897,P<0001、P<0001、P=0049;丙二醛:q=28450、20320、10160,P均<0001;磷酸化p38MAPK与p38MAPK比值:q=54310、15090、9196,P均<0001),且HS600+中药组大鼠血清肿瘤坏死因子-α与白细胞介素-18水平以及小肠组织中丙二醛水平和磷酸化p38MAPK与p38MAPK比值均明显低于LR组与HS600组、白细胞介素-10水平明显高于LR组与HS600组(肿瘤坏死因子-α:q=8494、3932,P<0001、P=0048;白细胞介素-18:q=9357、4165,P<0001、P=0031;丙二醛:q=18290、10160,P均<0001;磷酸化p38MAPK与p38MAPK比值:q=45110、5899,P<0001、P=0001;白细胞介素-10:q=7929、3939,P<0001、P=0047)。LR组、HS600组及HS600+中药组大鼠小肠组织中超氧化物歧化酶水平均明显低于假伤组(q=20880、14120、11110,P均<0001),且HS600+中药组明显高于LR组与HS600组(q=9772、4008,P<0001、P=0043)。结论与单独应用LR或HS补液相比,在HS补液基础上加用中药抗休克合剂可有效降低严重烫伤大鼠机体炎症反应及氧化应激反应程度、抑制p38MAPK通路过度活化,从而减轻早期肠损伤。 展开更多
关键词 烧伤 烫伤 休克 液体复苏 肠损伤 中药抗休克合剂 作用机制
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