串级萃取稀土工艺中流量测控系统的开发

介绍根据生产稀土的串级萃取工艺要求所设计的一套完整的、能够对流量进行自动检测、调节、显示及参数修改的测控系统。     

Non-alcoholic steatohepatitis (NASH): a disease of emerging identity and importance

The agar dilution MIC method was used to test the activity of cefminox, a beta-lactamase-stable cephamycin, compared with those of cefoxitin, cefotetan, moxalactam, ceftizoxime, cefotiam, cefamandole, cefoperazone, clindamycin, and metronidazole against 357 anaerobes. Overall, cefminox was the most active beta-lactam, with an MIC at which 50% of isolates are inhibited (MIC50) of 1.0 microg/ml and an MIC90 of 16.0 microg/ml. Other beta-lactams were less active, with respective MIC50s and MIC90s of 2.0 and 64.0 microg/ml for cefoxitin, 2.0 and 128.0 microg/ml for cefotetan, 2.0 and 64.0 microg/ml for moxalactam, 4.0 and > 128.0 microg/ml for ceftizoxime, 16.0 and > 128.0 microg/ml for cefotiam, 8.0 and >128.0 microg/ml for cefamandole, and 4.0 and 128.0 microg/ml for cefoperazone. The clindamycin MIC50 and MIC90 were 0.5 and 8.0 microg/ml, respectively, and the metronidazole MIC50 and MIC90 were 1.0 and 4.0 microg/ml, respectively. Cefminox was especially active against Bacteroides fragilis (MIC90, 2.0 microg/ml), Bacteroides thetaiotaomicron (MIC90, 4.0 microg/ml), fusobacteria (MIC90, 1.0 microg/ml), peptostreptococci (MIC90, 2.0 microg/ml), and clostridia, including Clostridium difficile (MIC90, 2.0 microg/ml). Time-kill studies performed with six representative anaerobic species revealed that at the MIC all compounds except ceftizoxime were bactericidal (99.9% killing) against all strains after 48 h. At 24 h, only cefminox and cefoxitin at 4x the MIC and cefoperazone at 8x the MIC were bactericidal against all strains. After 12 h, at the MIC all compounds except moxalactam, ceftizoxime, cefotiam, cefamandole, clindamycin, and metronidazole gave 90% killing of all strains. After 3 h, cefminox at 2 x the MIC produced the most rapid effect, with 90% killing of all strains.     

The effect of an H2-receptor antagonist on small-bowel colonization and bacterial translocation in newborn rats

Bacterial translocation (BT) is defined as the passage of enteric bacteria from the gastrointestinal tract to extraintestinal tissues. Bacterial overgrowth is one of the main promoting factors of BT, which is thought to play an important role in the pathogenesis of sepsis and necrotizing enterocolitis. It is believed that small-bowel colonization is established by bacterial spread through the rectum. Gastric acid is also involved in this process. An experimental study was designed for investigating the effect of gastric acid inhibition with the use of an H2-receptor antagonist on intestinal colonization and BT in newborn rats. Animals were divided into two groups: the ranitidine group (n = 20) received ranitidine 10 mg/kg per day intramuscularly for 5 days; the control group (n = 30) received saline solution. Mesenteric lymph node, spleen, liver, stomach, small bowel/cecum, and large bowel specimens were obtained from each rat 5 days later and gram-negative and -positive aerobic bacteria identified by the use of chocolate and Endo agar. It is concluded that: (1) there was a strong correlation between gastric and small-bowel bacterial colonization in the ranitidine group; (2) no correlation between large-and small-bowel colonization could be demonstrated; and (3) BT occurred only in the ranitidine group.     

陈同海总经理在中国石化集团公司暨股份公司2006年安全环保工作电视电话会议上的讲话(摘要)

党组决定今天召开集团公司暨股份公司2006年安全环保工作会议。在新年伊始就召开安全环保工作会议，是我们多年来坚持的好传统、好做法。这次会议的主要任务是，贯彻党的十六届四中、五中全会和中央经济工作会议精神，按照科学发展观和构建和谐社会的要求，落实集团公司暨股份公司2005年度工作会议的部署，把2006年安全环保工作安排好、落实好，为完成全年各项目标任务打下坚实的基础。     

四轮独立转向汽车高速时操纵稳定性的研究

讨论四轮独立转向底盘转向时前后轮迅速、连续响应问题，建立相应的数学模型，并采用比例控制法简化分析过程，提出控制策略。     

坡屋面轻钢龙骨挂瓦体系

坡屋面轻钢龙骨挂瓦体系许宁１设计意图及体系的基本构造１．１设计意图轻钢龙骨挂瓦体系用Ｕ形轻钢龙骨取代通常坡屋面采用的木制顺水条及挂瓦条，并配置必要的连接件，用金属膨胀螺栓与结构混凝土连接，从而克服了木制结构耐久性差的弱点和其它挂瓦体系存在的质量问题。...     

江门森汇广场深基坑锚杆支护施工技术

介绍了江门市森汇广场深基坑工程支护方案和采用跟管钻进法实施３８ｍ长预应力锚杆的施工技术。