Biodiesel, a nontoxic,cleaning, renewable and biodegradable fuel, is expected as a substitute for conventional fossil diesel. There are three main approaches to produce biodiesel, alkali-catalysis processing, enzymatic-catalysis processing and supercritical processing. With the unique property of energy-saving and environment-friendly, enzymatic-catalysis appears a great potential for industrial application. The main bottleneck of this technology is high cost and low stability of the lipase, as well as the inactivation of lipase by methanol and so on. To settle the problem, several methods have been used including the fixed-bed bioreactor, enzyme immobilized processing, whole-cell biocatalyst, changing addition method of methanol, developing of novel acyl acceptor, enhancing methanol resistance of lipase. The main problems and the relative strategy research of the enzymatic-catalysis technology were sum up.

The ralationship between traditional Chinese medicine (TCM) and intestinal microecology is increasingly being given more and more attention. Combined with the devolopment of intestinal microecology disciplines, effects of TCM on regulation of intestinal microecology have been gradually explained. Both clinical studies and animal experiments have confirmed that TCM can maintain the balance of intestinal microecology and regulate the intestinal flora. The author arrangemented the documents related to Chinese herbal compound adjusting intestinal flora in the recent ten years, summarized that the Chinese herbal compound which can strength spleen and replenish Qi, relax bowels and regulate Qi, dissipate dampness and check diarrhea, clear away heat and toxic materials, promote digestion and relieve stasis had certain regulation effects on intestinal microecology, providing basis for revealing the TCM essence of intestinal microecology.
Animals ; Digestion ; Drugs, Chinese Herbal ; pharmacology ; Gastrointestinal Microbiome ; drug effects ; Humans ; Intestines ; drug effects ; microbiology ; physiology ; Spleen ; drug effects ; physiology

Lipase gene from Penicillium expansum(lip07) was cloned and over-expressed in Pichia pastoris.a random mutant named ep8,which contained a single amino acid substitution,was obtained by using the lip07 as an error-prone PCR template in previous study.ep8 shows higher thermostability than that of lip07,To further improve the thermostability of the lipase,the Lys of wild-type(lip07) and mutant(ep8) in 202 were substituted by Ala using the Overlap extension PCR technique respectively.The mutant genes(lip07-K202A and ep8-K202A) were subcloned into pAO815,and then transformed into the Pichia pastoris GS115 for extracelluar expression,respectively.15% SDS-PAGE analysis indicated that the molecular mass of PEL-ep8-K202A and PEL-lip07-K202A are both about 28kDa,which is same with the wild-type lipase.The Tm of PEL-ep8-K202A is 41.66℃,2.63℃ higher than that of the wild-type(39.03℃) and 1.21℃ higher than the random mutant(PEL-ep8:40.45℃);the Tm of single mutant(PEL-lip07-K202A) is 37.08℃,2℃ lower than that of the wild-type lipase.

Objective To explore the relationship between Wuyishan cliff tea and esophageal cancer,and make integrated measures to prevent and control esophageal cancer.Methods A case-control study was conducted with a ratio of 1 to 1 and a health survey was conducted on objects which included 92 cases with histologically confirmed diagnoses of squamous-cell carcinoma of the esophagus and 92 controls matched by age,sex and resident.The analysis method of conditional logistic regression was used to analyze the influence of cliff tea on the development of esophageal cancer. Results The frequency of cliff tea drinking was 73.91% in cases with esophageal cancer compared with 84.78% in controls. As compared with subjects without tea drinking,subjects with cliff tea drinking significantly decreased the risk for developing esophageal cancer (P<0.05),and its OR were 0.60.The risk of esophageal cancer significantly reduced with increasing frequency of cliff tea drinking per week. Furthermore, we also found that the risk of esophageal cancer significantly reduced with the duration of cliff tea drinking and the early of beginning to drink cliff tea.Conclusion Wuyishan cliff tea drinking may protect against the risk of esophageal cancer.

This paper introduces the preamplifier for the microcomputer-detecting system of 3-Channel ECG signals and its technical specifications. The practical experiments and clinical applications show that its performances conforms with all the requirements of the system.
Amplifiers, Electronic ; Electrocardiography ; instrumentation ; Equipment Design ; Heart Diseases ; diagnosis ; Humans ; Image Enhancement ; instrumentation ; Microcomputers ; Signal Processing, Computer-Assisted

OBJECTIVETo observe the effect of nourishing Yin, strengthening Qi and activating blood decoction on Fas/FasL in salivary glands of NOD mice with Sjogren's syndrome and their mRNA expression.

METHODThirty-two NOD mice were randomly divided into the model group, the traditional Chinese medicine group (TCM group, orally given 0.4 mL nourishing Yin, strengthening Qi and activating blood decoction as per 100 g x kg(-1) everyday), the hydroxychloroquine group (given 0.4 mL hydroxychloroquine as per 60 mg x kg(-1) everyday), the traditional Chinese medicine and western medicine group (TCM WM group, given nourishing Yin, Strengthening Qi and activating blood decoction 50 g x kg(-1) and hydroxychloroquine 60 mg x kg(-1), 0.4 mL everyday), with eight mice in each group. Eight Balb/C mice were selected as the normal control group (normal group). All of mice were killed after eight weeks, and their submaxillary glands were dissected. The expression levels of Fas/FasL were examined by immunohistochemical method, and the FasL mRNA was detected by RT-PCR.

RESULTThe expression levels of Fas/FasL in salivary glands of the model group were higher than that of other groups (P < 0.05). The expression level of FasL of the normal group was much lower than that in the hydroxychloroquine group (P < 0.05). The relative expression level of Fas mRNA in salivary glands of the model group was higher than that in other groups, but the control group was notably lower than other groups (P < 0.05). The expression level of FasL mRNA in salivary glands of the model group was higher than that in TCM and TCM WM groups (P < 0.05). But the expression level in TCM WM group was notably lower than the hydroxychloroquine group (P < 0.05).

CONCLUSIONThe nourishing Yin, strengthening Qi and activating blood decoction could down-regulate the expression level of Fas/FasL in salivary glands of NOD mice with Sjogren's syndrome and their mRNA expression, and had a better efficacy after being combined with hydroxychloroquine. The nourishing Yin, strengthening Qi and activating blood decoction might treat the Sjogren's Syndrome by reducing apoptosis which is regulated by Fas/FasL

Animals ; Fas Ligand Protein ; genetics ; Female ; Gene Expression Regulation ; Medicine, Chinese Traditional ; methods ; Mice ; Mice, Inbred NOD ; Qi ; RNA, Messenger ; genetics ; metabolism ; Salivary Glands ; metabolism ; Sjogren's Syndrome ; blood ; genetics ; therapy ; Yin-Yang ; fas Receptor ; genetics

Humans ; Liver Diseases ; Practice Guidelines as Topic ; Prognosis

In order to make the experimental teaching adapt to the development of modern teaching idea and to meet the needs of the pharmaceutical industry for high quality talents, pharma-cology experiment teaching method has been reformed. Single teaching method has turned to diversi-fied teaching method according to the experimental contents, difficulty and characteristics of teaching situation, such as leading method of using theory after experiment in validation experiments and single blind method in multidrug efficacy experiment in the early stage, case-based teaching in comprehensive experiments in the middle stage , and student teaching method in designing experiments in the later stage. The study results show that students' interest in learning has been inspired,their experimental enthusiasm has been mobilized,and their operation, analysis and problem-solving ability has been improved, which is advantageous to the comprehensive quality education.

Objective To analyze the correlation of hypersensitive C-reactive protein(hs-CRP),homocysteine(Hcy) and D-dimer(D-D) with pathological change degree of coronary heart disease(CHD),and to investigate the diagnostic specificity and sensitivity of joint detection in CHD.Methods A total of 100 cases of CHD patients(experimental group) and 100 healthy subjects(control group) were enrolled,.Patients of the experimental group were divided into four groups on the basis of complications,including simple CHD group(32 cases),amalgamating hypertension group(46 cases),amalgamating diabetes group(9 cases),amalgamating hypertension diabetes group(13cases).The levels of hs-CRP,Hcy and D-D in the five groups were detected and analyzed.Results The levels of hs-CRP,Hcy and D-D in the experimental group were all higher than the control group(P<0.05).Logistic regression confirmed that three indexes were the independent risk factors for CHD.Each indicator has a certain clinical significance to the diagnosis and treatment of CHD but the value of Hcy could be better.Joint detection of hs-CRP and Hcy could be an ideal combination of detection,and the three joint detection might not be suitable for early diagnosis and treatment of CHD.The levels of hs-CRP and D-D in simple CHD group,amalgamating hypertension group,amalgamating hypertension diabetes group were all higher than amalgamating diabetes group(P<0.05).Conclusion hs-CRP,Hcy and D-D could be the independent risk factors of CHD,and joint detection might be with important clinical value for diagnosis of CHD.

Objective To explore the prevention and treatment of lymphorrhagia due to lymph node dissection in gastric carcinoma. MethodsClinical data of 743 patients undergoing radical gastrectomy plus lymphadenectomy from January 1997 to March 2004 were analyzed retrospectively. ResultsThe patients in D3 or D4 lymphadenectomy suffered from a higher lymphorrhagia rate than those in D2 lymphadenectomy(P