1.Advances in Solid-state Fermentation of Microbial Lipase
Xiao-Feng WANG ; Yun-Jun YAN ;
China Biotechnology 2006;0(01):-
Lipases have catalytic active in both aqueous phase and the non-aqueous phase and have a wide range of application in various industrial areas.However,the high cost of lipase production has restricted its extensive use in industry.Solid state fermentation possesses many advantages,such as low requirement for devices,low energy consumption,low production cost,little pollution to environment and easily being popularized,which have made it an important means in microbial production of lipases.Owing to the rapidly increased energy cost and the people's awareness of environmental protection,the solid state fermentation technique,which was regarded as low-tech in the past,has regained attention and developed rapidly since the 1990s.The production of lipase by SSF technique was reviewed.Mainly contents describe its characteristics,including physical and chemical factors and bioreactors.
2.Comparison of Feeding Tolerance in Very Low Birth Weight Infants with Transpyloric Feeding and Intragastric Feeding
yun, FENG ; jun, CHEN ; xiao-yu, ZHOU
Journal of Applied Clinical Pediatrics 2006;0(19):-
0.05).Duodenal perforation did not occur in 2 groups.Conclusions TP may significantly reduce the frequency of apnoea and vomiting and improve feeding tolerance in VLBWI,it can be used in VLBWI with suspected gastroesophageal reflux.
3.Thinking of study on secondary development of major traditional Chinese medicine varieties based on system theory.
Xu-Dong CHENG ; Xiao-Bin JIA ; Liang FENG ; Jun JIANG
China Journal of Chinese Materia Medica 2013;38(24):4369-4374
The secondary development of traditional Chinese medicines (TCMs) is an important content of TCM modernization process, as well as an important path for developing new TCM drugs. Under the guidance of the system theory, in response to the lack of the overall guideline and practical methods for the secondary development of TCMs at present, we introduced the overall thought of the secondary development of major TCM varieties, as well as the roles and contents of clinical research, pharmacology and pharmaceutics in the process of the secondary development of major TCM varieties, so as to provide systematic strategies and methods for the development of major TCM varieties.
Biomedical Research
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Drug Discovery
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methods
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Humans
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Medicine, Chinese Traditional
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methods
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Pharmacology
4.Study thought of material basis of secondary development of major traditional Chinese medicine varieties on basis of combination of in vivo and in vitro experiments.
Xu-Dong CHENG ; Xiao-Bin JIA ; Liang FENG ; Jun JIANG
China Journal of Chinese Materia Medica 2013;38(23):4174-4180
The secondary development of major traditional Chinese medicine varieties is one of important links during the modernization, scientification and standardization of traditional Chinese medicines. How to accurately and effectively identify the pharmacodynamic material basis of original formulae becomes the primary problem in the secondary development, as well as the bottleneck in the modernization development of traditional Chinese medicines. On the basis of the existing experimental methods, and according to the study thought that the multi-component and complex effects of traditional Chinese medicine components need to combine multi-disciplinary methods and technologies, we propose the study thought of the material basis of secondary development of major traditional Chinese medicine varieties based on the combination of in vivo and in vitro experiments. It is believed that studies on material basis needs three links, namely identification, screening and verification, and in vivo and in vitro study method corresponding to each link is mutually complemented and verified. Finally, the accurate and reliable material basis is selected. This thought provides reference for the secondary development of major traditional Chinese medicine varieties and studies on compound material basis.
Absorption
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Animals
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Drug Discovery
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methods
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Humans
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Medicine, Chinese Traditional
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methods
6.Optimization of Fermentation Conditions of Lipase Produced by Pseudomonas cepacia PCL-3
Xiao-Feng WANG ; Jiang-Ke YANG ; Yun-Jun YAN ;
China Biotechnology 2006;0(10):-
The fermentation conditions of alkaline lipase producing by Pseudomonas cepacia PCL-3 were optimized.Based on the analysis of single factorial experiments,dextrin was the most suitable carbon source,peptone and urea were the suitable compound nitrogen sources among the examined materials.Three significant factors(urea,inoculum and initial pH) were selected from the eight factors related to lipase production by Plaekett-Burman method,and were further optimized with response surface analysis.And then,steepest ascent procedures were applied to define the optimal response region of the three factors.The obtained optimal conditions were urea 0.15%,inoculum 3.05% and initial pH 8.38,under which conditions,the enzyme activity was improved from 25.37 U/ml to 48.88 U/ml,enhanced 1.93 folds.Starting from the flask conditions,the highest lipase activity of 47.69U/ml was achieved by batch fermentation in a 10 L fermentor after 52 h of the cultivation.
7.Functional neuroimagings' investigation based on clinical neuropsychology
Xiao-Ping, WANG ; M LASSONDE ; Jun-feng, WANG
Journal of Shanghai Jiaotong University(Medical Science) 2009;29(6):747-750
Neuropsychology, as well as cognitive neuroscience investigates the process of human cognition using several in vivo systemic approaches in order to explore neural mechanism. Besides the routine clinical neuropsychological assessments, up to date the latest neuroimaging techniques based on acoustics, optics, electricity and magnetism, have been applied to construct three-dimensional neuroimaging representations through mathematic models, and to identify functional areas or lesions in the brain. Presently, the combined use of functional MRI (fMRI) and event related potential (ERP) techniques is pioneering, especially when integrated synchronously.
8.Comparison of two methods of tonometry in glaucoma patients:Goldmann applanation tonometer and non-contact tonometer
Hong-Feng, LI ; Jun, OUYANG ; Xiao-Yong, QU
International Eye Science 2015;(1):144-145
? AlM: To compare the two methods for the measurement of glaucoma patients' intraocular pressure ( lOP) between Goldmann applanation tonometer ( GAT) and non-contact tonometer ( NCT) and find the laws of the two methods.?METHODS: The lOP of 108 glaucoma patients ( 206 eyes) were measured by GAT and NCT respectively.?RESULTS: ln 108 glaucoma patients, the average lOP of 206 eyes was 29. 77 ± 10. 27mmHg by GAT and 24. 59 ± 8. 58mmHg by NCT. There was significant difference between GAT and NCT (P<0. 01). The higher of lOP, the difference between GAT and NCT was greater.?CONCLUSlON: The measurement results with NCT were lower than that of GAT. The higher of lOP, the difference between GAT and NCT was greater. lt's better to measure lOP by GAT for the glaucoma patients, in order to avoid the misdiagnosis and mistreatment of glaucoma.
9.Efficacy of protein-free calf blood extract ophthalmic gel for children dry eye
Jun, OUYANG ; Xiao-Yong, QU ; Hong-Feng, LI
International Eye Science 2014;(12):2289-2291
AlM:To evaluate the clinic efficacy of protein-free calf blood extract ophthalmic gel on healing children dry eye.METHODS: One hundred patients ( 50 patients each group) with children dry eye were divided into two groups randomly: control group was dropped 1g/L sodium hyaluronate eye drop four times per day and experimental group was dropped protein-free calf blood extract ophthalmic gel four times per day. Both groups received the depathogeny treatment at the same time. Symptom scores, Schirmer l test values, tear break-up time ( BUT ) , cornea fluorescein staining scores were recorded on the prior treatment and 30d post-treatment, then they were analyzed.
RESULTS:There were statistically significant difference (P<0. 05) for the comparison in the symptom scores, Schirmer l test values, BUT, cornea fluorescein staining scores of prior treatment and post-treatment in each groups. And there were statistically significant difference (P<0. 05) in the same items of post-treatment between the two groups.
CONCLUSlON: There is a clearly beneficial effect of protein-free calf blood extract ophthalmic gel on healing children dry eye.
10.Mechanisms of Calcineurin Signaling Pathway Mediating Myocardium Apoptosis of Right Heart in Rats with Chronic Hypoxia
xiao-hong, XU ; jian-xin, TAN ; hua-jun, FENG
Journal of Applied Clinical Pediatrics 1986;0(01):-
Objective To investigate calcineurin signaling pathway which mediates myocardium apoptosis of right heart in rats with chronic hypoxia and the potential mechanisms of it.Methods A rat model of right ventricular hypertrophy(RVH) was established induced by chronic hypoxia(95-105 mL?L-1 O2).Used randomized block design based on different brood,30 rats were divided into 3 groups:treatment group with cyclosporine A(CsA,10 mg?kg-1?d-1,intraperitoneal injection),chronic hypoxia group,normal control group(with normal oxygen).The rats in CsA treatment group and chronic hypoxia group were exposed to normobaric chronic hypoxia(95-105 mL?L-1 O2,21 days).Apoptotic index(AI),calcineurin A?(CnA?) mRNA levels,Bcl-2 mRNA levels and the protein expression levels of CnA?,nuclear factor 3 of activated T cells(NFAT3) and Bcl-2 in right ventricle were investigated.Results 1.The AI of treatment group with CsA was higher than that in chronic hypoxia group(P