Effect of Cl- on photosynthetic bicarbonate uptake in two cyanobacteria Microcystis aeruginosa and Synechocystis PCC6803

Photosynthetic inorganic carbon utilization was investigated in two cyanobacteria Microcystis aeruginosa and Synechocystis PCC6803 grown in standing culture. Photosynthetic rates for the two algae reached about 10 times the theoretical CO₂ supply rate at low dissolved inorganic carbon (DIC) of 100 μmol/L, and the rates were unaffected by the addition of 20 mmol/L Na⁺, indicating that the two algae possessed Na+-independent HCO^-₃ utilization for photosynthesis under low DIC. Their photo- synthetic rates at low DIC were inhibited by higher Cl^- and the degrees of inhibition were increased with the rise of CI^- concentration, and in the presence of Diphenylamine-2-carboxylate (DPC), a reported Cl^- channel inhibitor, the rates decreased by 74%－82%, implying that putative DPC-sensitive Cl^- channels participate in Na+-independent HCO₃^- uptake for photosynthesis. The experiment of intracellular 14C-DIC accumulation for photosynthesis showed that internal DIC pools decreased by about 80% with 200 μmol/L DPC and by 64%－70% with 100 mmol/L Cl^-. The experiment of chlorophyll a fluorescence quenching showed that initial rates and extents of fluorescence quenching obviously decreased with 200 μmol/L DPC or 100 mmol/L Cl^-. The two experiments gave further evidence that putative DPC-sen- sitive Cl^- channels participate in Na+-independent HCO^-₃ uptake for photosynthesis in the two algae grown in standing culture.     

建立刑事和解不捕制度的构想——以检察业务为视角

为推动刑事和解制度的建立和取得实际成效，有必要运用现代法治理念对逮捕程序进行改造。受害人与加害人达成和解的轻罪案件，对加害人可以不采取逮捕措施，即使是重罪案件也应当从宽处理。和解不捕制度具有理论和现实依据，又易于实际操作，可作为我国构建刑事和解制度的突破口。     

碳酸氢铵防治轮虫及其对螺旋藻生长的影响

在螺旋藻大规模、开放式养殖过程中,利用碳酸氢铵对受轮虫污染危害的螺旋藻培养液进行杀虫处理。结果表明：当碳酸氢铵剂量〉150 mg/L时,螺旋藻轮虫的防治效果在24 h内可达90%以上,剂量越大杀虫效果越好,耗时越少;当碳酸氢铵剂量〉250 mg/L时,杀虫效果提高的同时对螺旋藻群体的生长也会产生不同程度的抑制和危害;当碳酸氢铵剂量〈100mg/L时,轮虫防治效果不到50%,生产实践中无应用价值。正常情况下利用碳酸氢铵进行大规模防治螺旋藻培养液轮虫时的剂量推荐为200 mg/L左右,并在条件许可时于傍晚前后施用为佳。     

嵌入式机场助航灯具污染胶层去除机理

通常称助航灯光是飞机的眼睛,清晰明亮的灯光标志既有利于飞行安全,又能为机场安全运营提供保障。本文利用刚性压头作用于弹性半空间上引起的压痕理论(Boussinesq模型)与Southern和Thomas处理疲劳裂纹扩展的理论相结合,研究碳酸氢钠颗粒每次冲击去除助航灯具污染胶层质量的数学模型,然后将其转换成冲蚀率,最后并进行实验分析。从该模型中可以看出污染胶层冲蚀率与胶层性能,碳酸氢钠粒子的尺寸、冲击速度、冲击角度等参数的关系,通过已有实验结果分析,并得出当喷射压力为0.62MP,喷射角度为73°时,除胶效果最佳。     

测量下油管实际长度的新方法

文章提出用电子经纬仪和微处理机相结合来测量下油管实际长度的新方法。该方法测量精度高,使用方便,并能实时显示、打印下油管的实际长度。     

五元交互体系N_a~＋，NH_4~＋‖SO_4~(2－)，Cl~－，HCO_3~－－H_2O在35℃时的溶解度相图

研究了Ｎａ＿２ＳＯ＿４－Ｎａｃｌ－ＮａＨＣＯ＿３（ＮＨ＿４）＿２ＳＯ＿４－ＮＨ＿４Ｃｌ－ＮＨ＿４ＨＣＯ＿３－Ｈ＿２Ｏ体系在指定温度下的溶解度关系。结果表明该五元交互体系的相图是由７个结晶区组成。在Ａ＿４、Ｂ＿４、Ｃ＿４、Ｄ＿４四个五元零变量点中，Ａ＿４和Ｄ＿４为相应体系的干涸点。     

Bicarbonate and chloride transport across rat ileal basolateral membrane

The mechanisms of HCO ₃ ^– and Cl^– transport across basolateral membranes from rat ileum were investigated in isolated vesicles by means of uptake experiments. Neither Cl^–/HCO ₃ ^– exchanger nor Na⁺–(HCO ₃ ^– )_n cotransport seem to be present in ileal basolateral membranes. Moreover Cl^– uptake is unaffected bycis Na⁺ and/or K⁺ gradients, indicating the absence of Na⁺–Cl^–, K⁺–Cl^– and Na⁺–K⁺–2Cl^– symport activity. An electrically conductive pathway seems to be responsible for both HCO ₃ ^– and Cl^– fluxes. Evidence is also given for the presence of a Na⁺/H⁺ exchanger at the basolateral pole of ileal enterocytes.     

新升本科高校机关效能建设实效性的探讨

加强机关效能建设,是切实转变机关作风,落实学校发展战略决策的有效保证。对于新升本科高校,为确保顺利通过教育部本科教学工作水平评估,机关效能建设的实效性更显重要。     

实际问题是马克思主义中国化的切入点

从正反两方面论证实际问题为什么能成为马克思主义中国化的切入点,以及对实际问题的认识和解决在应用和发展马克思主义理论中的地位。     

足球机器人仿真系统的结构与设计分析

以拓扑结构为线索，以同步问题为例分析了足球机器人仿真系统的设计要点，对问题进行了较详细的分析的同时，提出了相应的解决方法，文章还从设计的角度分析了足球机器人仿真系统的结构，应用目的和技术环境这三者之间的一些必然联系。