摘要：北卡罗来纳州立大学的研究人员发现,利用一种新研发的布过滤器(棉布和碳酸酐酶复合而成),在理想的速率下可将空气或气体混合物中的二氧化碳分离出来。该研究小组设计的织物化学过滤器,其核心是自然环境存在的碳酸酐酶,可快速地将二氧化碳和水转化为碳酸氢盐。这种酶在人体中起着重要作用,利于二氧化碳呼出体外。

摘要：在像挪威等原水碱度低的地区运行高补充水冲洗率的循环水系统（RAS）时，碱浓度方面的知识很重要。采用低碱度补充水冲洗RAS，冲洗掉了给RAS带来价值的基础性物质（如碳酸氢盐、氢氧化物或碳酸盐），这为维持高碱浓度增加了运行成本。不管怎样，碱度不能太低以免影响到硝化作用或pH的稳定。因此设计了一项研究，以评价在多级曝气期间，两个运行移动床生物滤器的完全相同规模大西洋二龄鲑养殖系统中碱度对生物滤器性能和二氧化碳气提的影响。

摘要：在苏教版必修Ⅰ《碳酸钠和碳酸氢钠的应用》的实际教学中,笔者曾在该课中提出三个问题让学生思考、讨论、比较:①请设计尽可能多的实验方案,鉴别两瓶失去标签的碳酸钠、碳酸氢钠固体;②请设计一个最优化的实验方案,判断某包白色固体是碳酸钠、还是碳酸氢钠(并按学生设计的方案进行演示实验);③将碳酸氢钠固体加热一段时间后,剩余的固体成分可能是什么?

摘要：背景为改善血小板(PLT)质量,比较加入T-Sol和PAS-27a两种不同保存液的超浓缩血小板(hcPCs)和标准的浓缩血小板(stdPCs)的血小板活性,PAS-27a与T-So的差别在于前者含有葡萄糖,磷酸盐、钾、镁、碳酸氢盐。研究设计与方案从每名献血者进行2次机器单采血小板(n=14),每单位分成两份。这样从每名供者获得4份hcPCs:每份含有2000×10^9血小板,保存于T-Sol或PAS-27a,stdPCs每份含l400×10^9血小板,保存于65%T-Sol或PAS-27a和35%酸性柠檬酸盐葡萄糖血浆中。[第一段]

摘要：Objectives: To determine incidence, outcomes, and risk factors for pediatric c erebral edema with diabetic ketoacidosis (CEDKA) in Canada. Study design: This w as a case-control study nested within a population-based active surveillance s tudy of CEDK A in Canada from July 1999 to June 2001. Cases are patients with DK A <16 years of age with cerebral edema. Two unmatched control subjects per case are patients with DKA without cerebral edema. Results: Thirteen cases of CEDKA w ere identified over the surveillance period for an incidence rate of 0.51%; 23 %died and 15%survived with neurologic sequelae. CEDKA was present at initial p resentation of DKA in 19%of cases. CEDKA was associated with lower initial bica rbonate (P =. 001), higher initial urea (P =. 001), and higher glucose at presen tation (P =. 014). Although there was a trend to association with higher fluid r ates and treatment with bicarbonate, these were not independent predictors. Conc lusions: CEDKA remains a significant problem with a high mortality rate. No asso ciation was found between the occurrence of CEDKA and treatment factors. The pre sence of cerebral edema before treatment of DKA and the association with severit y of illness suggest that prevention of DKA is the key to avoiding this devastat ing complication.