Investigation and optimization on ability of enzymatic hydrolysis of Mori Cortex residue / 中国中药杂志

Residue of Mori Cortex was studied to optimize its enzymatic hydrolysis process, and explore its potential as a carbon source for biochemistry and biofuel production. The cellulose content of diluted acid pretreated (DAP) and non-pretreated from Mori Cortex were measured in this study, and the results showed that the cellulose content of DAP and non-pretreated from Mori Cortex were 52.5% and 47%, respectively. This higher cellulose content indicated that residue of Mori Cortex had the potential to act as a carbon source for biochemistry and biofuel production. Enzymatic hydrolysis of pretreated and non-pretreated from Mori Cortex was conducted under different enzyme loading amount. 40 FPU·(g DW）⁻¹ enzyme loading was determined as the optimal amount by comparing the yield of sugar and the rate of enzymolysis. Under this condition, the concentrations of glucose, xylose, arabinose sugar were 23.82, 4.84, 3.6 g·L⁻¹, and the corresponding enzymatic hydrolysis rate was 45.33% which was 2.3 times higher than that of non-pretreated from Morus alba residues. Fed-batch enzymatic hydrolysis was conducted finally to get higher sugar yield, and the final glucose concentration reached up to 38 g·L⁻¹ with the enzymatic hydrolysis rate of 36.19%. The results indicated that Mori Cortex residue had higher cellulose and hemicellulose contents, so it had the potential to become a carbon source to produce the bio-chemicals and biofuels. Through enzymatic hydrolysis, it can be converted into microbial available monosaccharides; and through fermentation, it can be converted into high value-added chemicals, biofuels, etc., to solve the problem of residue pollution, and achieve the sustainable development and greening of Chinese pharmaceutical production process.

Influence of light on gene expression of key synthesis enzyme genes FtANR and FtLAR about proanthocyanidin in seeds of homologous plant of food and medicine Fagopyrum tataricum / 中国中药杂志

Tartary buckwheat Fagopyrum tataricum is an important medicinal and functional herb due to its rich content of flavonoids in the seeds. F.tataricum exhibited good functions for free radicals scavenging， anti-oxidation， anti-aging activities. Although much genetic knowledge of the synthesis， regulation， accumulation of rutin， the genetic basis of proanthocyanidins(PAs) in tartary buckwheat and their related gene expression changes under different lights(blue， red， far red， ultraviolet light) remain largely unexplored. In this study， we cloned one anthocyanidin reductase gene(ANR) and two leucocyanidin reductase gene(LAR) named FtANR，FtLAR1，FtLAR3 involved in formation of(+)-catechin and(-)-epicatechin precusor proanthocyanidin by digging out F. tataricum seed transcriptome data. The expression data showed that the opposite influence of red light on these gene transcript level compared to others lights. The expression levels of FtANR and FtLAR1 decreased and FtLAR3 appeared increment after exposed in the red light， while the expression levels of those genes appeared opposite result after exposed in the blue and far red light.

Identification of bear bile powder and its adulterants by using DNA barcoding technology / 中国中药杂志

To identify the precious bile powder and its adulterants by DNA barcoding, and establish its standard experimental process to ensure the safe and effective utilization. Total twelve sequences from samples of bear bile powder which come from Ursus thibetanus for DNA extraction, PCR(polymerase chain reaction) and sequence, then using CodonCode Aligner V 7.0.1 shear primer region to obtain COI sequence. The COI sequences of U. arctos and their adulterants were obtained from GenBank. MEGA7.0 software was applied for analyzing mutation, calculating intraspecific and interspecific K2P(Kimura 2-Parameter) genetic distance and constructing the Neighbor-joining tree(NJ). The results showed that the maximum K2P genetic distance of bear bile powder of U. thibetanus and U. arctos are far less than minimum K2P genetic distance within its adulterants species, and the results of NJ tree demonstrated that each species could be distinguished from the counterfeits obviously. DNA barcoding is a safe, convenient and reliable technique for species identification, and it is important to establish the standard sequence of COI sequences for animal medicines.

Surgical treatment of posttraumatic foreign bodies in the heart or great vessels / 中华医学杂志(英文版)

Posttraumatic foreign bodies in the heart or great vessels is rare, which may cause cardiac tamponade, bleeding, shock, infection, embolism, arrhythmia, valve dysfunction, etc. The foreign bodies can be removed by surgery or percutaneous intervention. In this report we reviewed our experience in managing posttraumatic foreign bodies in 13 patients at our institution from 1992 to 2002.

Diagnosis and treatment of traumatic tricuspid valve insufficiency / 中华创伤杂志(英文版)

Traumatic tricuspid valve insufficiency (TTVI) is a relatively uncommon disease. To summarize the experience in the diagnosis and treatment of TTVI, we have analyzed the clinical data of 3 patients with TTVI who were admitted to the department of cardiac surgery of our hospital between April 1997 to April 2002. Relevant literatures have also been reviewed.