A high Streptolydigin-producing strain Streptomyces lydicus AS 4.2501-L8 with genetic stability was obtained from the original strain S. lydicus AS 4.2501-P28 by mutagenesis with UV and acridine orange, followed by resistance selection. Its yield of Streptolydigin was 177.0 ?g/mL, 96.2% higher than the original strain.

Objective: To learn the influencing factors for self-violent thoughts and behaviors among the ninth-grade students in Jiangbei District of Ningbo, so as to provide the basis for carrying out psychological intervention. Methods: The ninth-grade students in a junior high school each of the six streets ( towns ) in Jiangbei District were recruited by multi-stage cluster sampling method from October to November 2018. A self-designed questionnaire was used to investigate the general information, life style, psychological condition, self-violent thoughts and behaviors in the latest year. Multivariate logistic regression model was used to analyze the influencing factors for self-violent thoughts and behaviors. Results: A total of 1 300 questionnaires were issued and 1 238 valid ones were recovered, with an effective rate of 95.23%. The prevalence rates of self-violent thoughts and behaviors among the ninth-grade students were 16.88% and 8.48%. TheResults of the multivariate logistic regression analysis showed that abnormal marital status of parents ( OR=2.074, 95%CI: 1.139-3.775 ) , no moderate physical activity ( OR=1.764, 95%CI: 1.101-2.826 ) , sleeping less than 8 hours ( OR=1.858, 95%CI: 1.273-2.712 ) , alcohol consumption ( OR=2.108, 95%CI: 1.448-3.070 ) , sense of despair ( OR=6.397, 95%CI: 4.195-9.757 ) , sense of anxiety ( OR=4.094, 95%CI: 2.725-6.151 ) , sense of loneliness ( OR=1.879, 95%CI: 1.241-2.854 ) , and cyber-bullying ( OR=5.155, 95%CI: 2.780-9.556 ) were risk factors for self-violent thoughts; not living with parents ( OR=2.057, 95%CI: 1.021-4.145 ) , alcohol consumption ( OR=1.756, 95%CI: 1.074-2.872 ) , sense of despair ( OR=7.197, 95%CI: 4.365-11.864 ) , sense of anxiety ( OR=5.832, 95%CI: 3.276-10.382 ) , fighting ( OR=2.272, 95%CI: 1.219-4.232 ) and physical bullying ( OR=3.462, 95%CI: 1.135-10.558 ) were risk factors for self-violent behaviors. Conclusion Drinking, family relationship, bullying, and mental health problems such as sense of despair and anxiety were associated with the self-violent thoughts and behaviors of ninth-grade students.

Objective To compare the difference in the effects on liver function between transjugular intrahepatic portosystemic shunt (TIPS) alone and the combination of TIPS and left gastric vein embolization (LGVE) in patients with liver cirrhosis.Methods This research was a retrospective study.From September 2014 to September 2015,31 patients with liver cirrhosis underwent TIPS (TIPS group) and 29 patients with liver cirrhosis underwent TIPS combined with LGVE (TIPS+LGVE group) were enrolled.The data of the liver function of patients before and after operation were collected and the Child-Pugh score and model for end-stage liver disease (MELD) were also calculated.Student's t test and chi-squared test were performed for statistical analysis.Results The preoperative portal vein pressures of TIPS group and TIPS+LGVE group were (28.48±2.77) mmHg (1 mmHg=0.133 kPa) and (28.38± 2.92) mmHg,respectively.And after operation,the portal vein pressures decreased to (17.81 ± 1.47) mmHg and (17.97 ± 2.04) mmHg,respectively,and the differences were both statistically significant (t=18.908 and 11.648,both P＜0.01).At 12 months after operation,Child-Pugh score of TIPS+ LGVE group was 5.69 ± 1.19,which was significantly lower than that before operation (7.03±1.76),and the difference was statistically significant (t=3.398,P=0.001),which was also lower than that of TIPS group at the same time point (6.52 ± 1.54),and the difference was statistically significant (t =2.303,P=0.025).At 12 months after operation,the component ratio of patients with Child-Pugh grade A of TIPS±LGVE group was 89.7％ (26/29),which was higher than that before operation (44.8％,13/29),and the difference was statistically significant (x2=13.228,P＜0.01).The component ratio of patients with Child-Pugh grade B was 6.9 ％ (2/29),which was lower than that before operation (41.4 ％,12/29),and the difference was statistically significant (x2 =9.416,P＜ 0.01).Conclusions TIPS significantly reduces portal vein pressure in patients with liver cirrhosis and it does not deteriorate liver function of patients in the long term.The combination of TIPS and LGVE is better than TIPS alone in improving liver function in patients with liver cirrhosis,especially in improvig long-term liver function in patients of Child-Pugh A and B grade.

Objective To explore the changes of the plasma motilin(MTL)and serum gastrin(GAS)levels and their relationship with course of disease,the severity,the complication of digestive system in neonates with intracranial haemorrhage(ICH).Methods The objects were 26 cases of term newborns with ICH,the healthy control group contained 30 cases of healthy term newborns.Plasma motilin and serum gastrin concentration were measured by radioimmmunoassay in 26 cases of newborns with ICH in the 2 d,3-5 d,7-10 d,and 12-15 d after birth,and compared with the healthy control group.Results Compared with healthy control group,the blood GAS and MTL levels of neonatal ICH group increased dramatically(Pa

Volatile oil components and the contents and types of amino acid in spica of Prunella vulgaris were analysed by GC-MS and amino acid analyzer. Esters, fatty acids, aromatic hydrocarbon, ketone and several alcohol compounds were identified by mass spectrum comparison. In these ingredients, beta-ionone smelled aroma of cedar, raspberry, nerolidol showed weak sweet soft orange blossom flavor, neroli tasted sweet and fresh, nerolidol tasted sweet with light aroma of wood, hexadecanal showed a weak aroma of flowers and wax, alpha-sinensal had rich and fresh sweet orange flavor. To some extent, these types of aromatic substances can affect the taste of herbal tea or decoction made of Spica Prunellae. Among amino acids detected, natural amino acids accounted for a larger proportion, and those natural amino acids showed bitterness, slight bitterness, sourness (freshness), sweetness, slight sweetness, sourness (slight freshness). The results indicated that bitter and slightly bitter amino acids have the greatest impacts on the sense of Spica Prunellae.
Amino Acids ; analysis ; Gas Chromatography-Mass Spectrometry ; Oils, Volatile ; analysis ; Prunella ; chemistry ; Taste

Objective To control residual DNA by optimizing methodology during the production of rabies vaccine using Vero cells as a vector .Methods The antigen recovery rate was assessed by linked immunosorbent assay-sandwich technique while the residual DNA was detected by DNA probe hybridization method .Antigen recovery and removal of DNA were the main indexes for evaluateing ultrafiltration , the vital part of rabies vaccine production .Three key factors in ultrafiltration were assessed: selection of membrane packages , ultrafiltration pressure and the concentration ratio .Then protamine was used to pretreat ultrafiltrates .Based on the two indicators mentioned above , the effect of protamine pretreat-ment on the ultrafiltrate was evaluated .Results and Conclusion The optimum condition of ultrafiltration was obtained on the basis of the general antigen recovery rate , DNA removal rate and actual production .The primary parameters of ultrafil-tration were as follows:7.5 ×105 ultrafiltration membrane packages, 20 times concentrated, 15 psi ultrafiltration pressure. After pretreatment with protamine , ultrafiltration has proved to be a molecular sieve in intercepting DNA ,while protamine can tangle the fragmented DNA and form a larger molecular segment , which is believed to be more conducive to ultrafiltra-tion interception .

Objective To study emptying of gallbladder in children with functional dyspepsia(FD),and to investigate correlation of their helicobacter pylori(Hp) status and gallbladder emptying rate.Methods Sixty children with FD were studied,including 30 Hp-ne-(gative) and 30 Hp-positive children.Thirty Hp-positive children received triple eradication therapy 1 week.After 4 weeks,the Hp tests were taken again,27 children became Hp-negative,and the others were still positive eliminated from the study.The difference between the above groups in gallbladder volumes before breakfast and postprandial gallbladder emptying rate were compared.Results The gallbladder volumes before breakfast were bigger and the emptying rate of postprandial gallbladder of children with FD were lower than those of normal controls(P0.05).Conclusions Delayed emptying of gallbladder may cause FD in children.Hp infection isn′t associated with the gallbladder emptying rate.

Data mining, as known as knowledge discovery in databases, is a non-trivial process of revealing the implied, previously unknown and potentially useful information from the massive data. In recently years, the applications of data mining in the field of pharmaceutical research of traditional Chinese medicine have widespread. Especially in the field of the heritage of experiences of na-tional medical masters, data mining plays an important role. In this study, we would expound of the use of methods of data mining in the heritage of experiences of national medical masters, and analyze their advantages and disadvantages, such as association rules, Bayesian networks, neural networks, and decision trees.
Data Mining ; Databases, Pharmaceutical ; Medicine, Chinese Traditional ; Neural Networks (Computer)

Objective:To evaluate the relationship between the mechanism of promoting wound healing by modified autologous blood transfusion and metastasis-associated lung adenocarcinoma transcript 1 ( MALAT1) in diabetic mice. Methods:Twenty SPF ICR mice, weighing 21-25 g, in which the diabetic model was successfully established, were divided into 2 groups ( n=10 each) using a random number table method: modified preservation group (group I) and ordinary preservation group (group O). Peripheral venous blood samples were collected and stored in the corresponding preservation solution for 7 days.The platelet aggregation rate, blood glucose, serum glycosylated hemoglobin (GHB) and phosphodiesterase (DPG) concentrations and WBC were measured.Autologous blood was transfused back immediately after the wound model was established.The percentage of wound healing area was calculated at 7, 10 and 14 days after autologous blood transfusion.The expression of hypoxia-inducible factor-1α, vascular endothelial growth factor, matrix metalloproteinase-9, β-actin, type Ⅰ collagen (Col Ⅰ), Col Ⅲ protein and mRNA and MALAT1 was determined by Western blot, immunohistochemistry and quantitative real-time polymerase chain reaction respectively, at 14 days after transfusion. Results:Compared with group O, the blood glucose, serum concentrations of GHB and DPG, and WBC were significantly decreased, platelet aggregation rate was increased, the percentage of wound healing area was increased, the positive staining rate of Col Ⅰ and Col Ⅲ was increased, and the expression of hypoxia-inducible factor-1α, vascular endothelial growth factor, matrix metalloproteinase-9, ColⅠ, Col Ⅲ and β-actin protein and mRNA and MALAT1 was up-regulated in group I ( P<0.05). Conclusion:The mechanism by which modified autologous blood transfusion promotes wound healing may be related to up-regulating MALAT1 expression in diabetic mice.

Objective To understand the epidemicological condition of human brucellosis in Zhengzhou city to provide scientific evidence for future preventive and control measures. Methods Surveillance on high risk populations were done in the designated monitoring Gongyi City and other randomized monitoring cities or counties (4 or 5 towns or farms were selected in each city or county) during the year from 2002 to 2007. The intradermic allergy test with brucellin were carried out among high risk populations who had been in close touch of domestic animals or their products in those cities, and standard tube agglutination test(SAT) were used for those who had suspected clinic symptom or positive result of intradermie allergy test during 2002 to 2005. The SAT investigations for enterprises of livestock breeding were performed in non-designated monitoring cities. All manipulation methods and judging standards were according to the manual of prevention and treatment for human brucellosis. Results In the designated monitoring city Gongyi from 2002 to 2007, a total of 13 831 people were investigated, among whom 3744 peoples were tested by intradermic allergy test and the positive rate was 1.01%(38/3744). Fifty-four cases were positive in SAT among 2693, and the positive rate of SAT was 2.01%(54/2693). Forty-four new cases were diagnosed. In the 11 non-designated monitoring city from 2002 to 2005, 13 136 persons were treated by intradermic allergy test, the positive rate was 0.62% (82/13 136), among these 1316 persons were treated by SAT and 66 patients were positive. The positive rate was 5.02% (66/1316) from 2002 to 2007. Fifty one new cases were diagnosed. In the enterprises of domestic animals breeding, among 242 and 688 employees were treated by SAT, 17 and 16 patients were positive, the positive rate were 7.02%(17/242) and 5.02%(16/688) in 2006 and 2007, respectively. Conclusions The infection of human brucellosis in Zhengzhou is rising up. The governments at all levels must put large amounts of funds for the monitoring, investigating and disinfecting to prevent the disease from increasing and outspreading.