百蕊草药材与标准汤剂量值传递规律研究及分析

目的 建立百蕊草Thesii Herba标准汤剂的UPLC特征图谱及其指标成分的含量测定方法;研究百蕊草药材与标准汤剂特征图谱的变化,并分析指标成分百蕊草素I在药材-标准汤剂的量值传递规律。方法 采用Waters Acquity UPLC BEH Shield RP18色谱柱（150 mm×2.1 mm,1.7μm）,流动相为乙腈-0.2%甲酸水溶液,梯度洗脱,体积流量0.4 mL/min,检测波长330、270 nm,柱温30℃,建立特征图谱与含量测定方法。以出膏率、含量及转移率、特征图谱共有峰传递数为主要评价指标,分析百蕊草标准汤剂的量值传递规律。结果 19批百蕊草药材、标准汤剂与各自的对照特征图谱相似度分别为0.986～1.000、0.989～1.000。百蕊草标准汤剂特征图谱标定6个共有峰,药材中的5个共有峰全部转移至标准汤剂并被指认,其中4个共有峰采用对照品比对确认,分别为5-O-阿魏酰奎宁酸（峰2）、4-O-阿魏酰奎宁酸（峰3）、百蕊草素I（峰5）、山柰酚-3-O-(2″-O-α-鼠李糖基-6″-O-丙二酰基)-β-葡萄糖苷（峰6）。19批标准汤剂的平均出膏率为27.45%...     

Methylenetetrahydrofolate Reductase Genotypes, Dietary Habits and Susceptibility to Stomach Cancer

OBJECTIVE To study the relation among methylenetetrahydrofolate reductase (MTHFR) C677T genotypes, dietary habits and the risk of stomach cancer (SC).METHODS A case-control study was conducted with 107 cases of SC and 200 population-based controls in Chuzhou district, Huaian, Jiangsu province, China. The epidemiological data were collected, and DNA of peripheral blood leukocytes was obtained from all of the subjects..MTHFR genotypes were detected by PCR-RFLP. RESULTS (1) The prevalence of the MTHFR C/T or T/T genotypes was found to be significantly different between controls (68.5%) and SC cases (79.4%,P=0.0416), the increased risk had an adjusted OR of 1.79 (95?:1.01-3.19). (2) Among subjects who had a low intake of garlic or Chinese onion, MTHFR C/T or T/T genotypes significantly increased the risk of developing SC. Among non-tea drinkers or among subjects who had a frequent intakeof meat, the carriers of the MTHFR C/T or T/T genotypes had a higher risk of SC than individuals with the C/C type MTHFR. CONCLUSION The polymorphism of MTHFR C677T was associated with increased risk of developing SC, and that individuals with differing genotypes may have different susceptibilities to SC, based on their exposure level to environmental factors.     

Intermediary metabolism of the mature rat following 2,3,7,8-tetrachlorodibenzo-p-dioxin treatment

Changes in body weight, feed intake, hepatic cellularity, and intermediary metabolism were assessed in the mature male (450 g) rat following 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) administration. All animals were schedule-fed (8-hr feeding period/24 hr) and treated with a single oral dose of either TCDD (75 micrograms/kg) or vehicle. Blood and tissues were sampled 16 to 18 hr following the end of the feeding period on 2, 4, 6, and 8 days post-treatment. Mature rats treated with TCDD exhibited a slight but progressive reduction in both body weight and feed intake throughout the 8-day experimental period. An increase in liver mass that was apparent at 2 days and plateaued by 4 days after TCDD treatment was associated with a decrease in the concentration of DNA per gram of wet liver. However, the total liver content of DNA in TCDD-treated rats remained similar to pair-fed animals. Thus, TCDD treatment produced liver enlargement in the mature rat that was the result of hepatocellular hypertrophy and not an increase in cell number. Hepatic glycogen content in TCDD-treated rats was threefold higher than their pair-fed counterparts at 2 to 6 days post-treatment, and this augmentation would account, in part, for the hypertrophy of the liver cell found after administration of TCDD. Plasma glucose and lactate concentrations were similar in TCDD-treated and pair-fed rats, suggesting that the Cori cycle remained unaltered following TCDD administration. Likewise, heart and gastrocnemius glycogen concentrations were similar in all experimental groups. Urinary excretion of urea, ammonia, and creatinine was comparable in TCDD-treated rats and their pair-fed counterparts, indicative of a nitrogen balance that was not disturbed by TCDD. Plasma glutamine concentrations in TCDD-treated rats tended to be reduced and were significantly lower at Day 6 post-treatment when compared to those of pair-fed counterparts, suggestive that amino acid release from muscle was not enhanced in TCDD-treated rats. Likewise, plasma concentrations of branched-chain amino acids, which are metabolized to a large extent in muscle, tended to be lower on Day 6 following TCDD treatment. Yet at Day 6 post-treatment, the circulating concentrations of amino acids that are metabolized by the liver were elevated in TCDD-treated animals. TCDD administration also resulted in an increase in total hepatic protein concentration which was evident at 4 days and increased progressively at 6 and 8 days post-treatment. Liver content of phospholipids also increased gradually following administration of TCDD.(ABSTRACT TRUNCATED AT 400 WORDS)     

冬梅饮对早期糖尿病肾病肾组织基质金属蛋白降解酶-9作用的实验研究

目的:评价中药冬梅饮对早期糖尿病肾病(DN)大鼠肾组织基质金属蛋白酶-9(MMP-9)的影响,探讨其防治早期DN的作用机制。方法:用链尿佐菌素建立早期DN模型,观察冬梅饮对早期DN大鼠血糖、尿β2-MG、肾组织MMP-9的影响。结果:冬梅饮治疗组可升高模型大鼠肾组织MMP-9含量增加(P0.05);降低24h尿β2-MG排泄率(P0.05)。结论:冬梅饮对肾脏具有保护作用,可延缓DN的发展。     

大学男生形态学指标比较和优选

目的 优选科学合理的大学男生形态学指标。方法 选取3 577名安徽省大学男生2013年健康体质测试数据,利用数理统计和密切值法研究8种人体形态学指标的差异。结果 男大学生8项形态学指标间相关程度较高,均能反映出大学生体质发育状况,但指标间差异有统计学意义(P<0.01),此差异来源于指标的不同算法;结果显示最优的指标为克托莱指数,其次是人体体积和体表面积体重指数,体质指数排在第4位。结论 男大学生体质发育评价最优指标为克托莱指数。     

真武汤治疗糖尿病肾病的临床效果

目的 探析真武汤治疗糖尿病肾病的临床效果.方法 选取该院于2018年3月—2020年3月收治的100例糖尿病肾病患者,按照数字表法随机分为两组,对照组采用常规西药治疗,在此基础上观察组加用真武汤治疗,比较两组患者的临床疗效和治疗前后的相关指标变化.结果 观察组的总有效率88.0％高于对照组64.0％,差异有统计学意义(...     

富硼菊花栽培技术研究

本文通过对菊花施用不同处理的速乐TM和持力硼TM，比较硼肥对菊花中重要的指标绿原酸、槲皮素、木犀草素及总黄酮含量的影响。结果表明：喷施1200倍浓度的速乐硼TM对菊花的中各组分的含量影响与对照（喷清水）相比有显著提高。     

MMED 6000M监护仪开关电源原理及维修

本文介绍了开关电源的组成和工作原理，结合监护仪开关电源的故障实例，分析了故障原因，并最终解决故障。     

毛细管气相色谱法测定化妆品中对羟基苯甲酸酯的含量

目的建立毛细管气相色谱法测定化妆品中的对羟基苯甲酸甲酯和对羟基苯甲酸乙酯。方法采用溶液直接进样法测定,DB-17毛细管柱,FID检测器,分流比10∶1。结果两种防腐剂在10～200μg·mL-1浓度范围内呈良好线性关系,相关系数分别为0.9992、0.9993,两种化合物的加标回收率为95%～98%。结论本法耗时少,分离度高,用标准曲线法测定,方法简单可靠。     

Different effects of soil bacterial communities affected by biocontrol agent YH-07 on tomato Fusarium wilt inhibition

Bio-organic fertilizers based on biocontrol microorganisms have been widely applied to suppress soilborne diseases and improve crop yields. Studies on beneficial biocontrol agents have promoted the development of the bio-organic fertilizers in China. Our previous study demonstrated that a biocontrol agent, Erythrobacter sp. YH-07, can inhibit the growth of the plant pathogen Fusarium oxysporum. In the present study, we investigated the effects of this biocontrol agent on tomato wilt and used the illumina-based sequencing approach to characterize the variations in soil bacterial communities in a potted experiment. The aim of our study was to explore the potential correlation among bacterial communities, Fusarium wilt suppression, and soil properties after application of the biocontrol agent YH-07. The results showed that application of Erythrobacter sp. YH-07 effectively controlled outbreaks of tomato Fusarium wilt. The illumina MiSeq sequencing showed that Proteobacteria was the predominant phylum in the soil samples. Bacterial community composition and structure varied under different soil treatments, e.g., the relative abundance of Erythrobacter and Salinimicrobium was significantly increased in the YH treatment, and Acidobacteria were decreased in the YH treatment compared with the CK treatment. Additionally, the correlation results showed that the soil organic matter and available phosphorus and potassium were higher after YH-07 application, and they were positively correlated with bacterial community. The redundancy analysis showed Erythrobacter and Acidobacteria were the dominant genera after YH and CK treatments, respectively, and correlations with tomato Fusarium wilt incidence were negative and positive, respectively.

The model plant tomato was used to verify the effect and mechanism of a novel discovered strain YH-07 which is a potential agent for biological control of soil borne disease named tomato Fusarium wilt.