几种国产FCC催化剂动态活性的研究

对几种国产 FCC 催化剂动态活性进行了研究,试验是在常规微活装置上进行的。原料油用大港轻柴油;反应温度460℃,剂油比3.2,重量空速16h^(-1)。试验结果为:各催化剂的动态活性大小顺序是 ZCM-7>ZCD-5>CRC-2>CRC->偏 y15,将偏u15与 ZCM-7(二者微反活性均为 MA.70(混合,随 ZCM-7含量的增加,焦炭产率逐渐降低,动态活性呈线性增加将动态活性与固定流化床催化裂化实验装置工艺评价的结果进行了关联。结果为,动态活性高的催化剂,蜡油解裂焦炭产率低;动态活性低者、焦炭产率高。二者具有一定的对应关系。因而,将微反活性 MA 与动态活性 DA 结合起来,更能确切地表征 FCC 催化剂的使用性能。

斑须按蚊唾液腺中疟原虫配子体激活因子的活性动态

目的 探讨斑须按蚊生长、发育过程唾液腺中疟原虫配子体激活因子的活性动态。方法 应用体外雄配子体出丝分析方法 ,检测雌性斑须按蚊羽化后、吸血及产卵前后唾液腺中疟原虫配子体激活因子对柏氏疟原虫雄配子体出丝诱导活性的变化。结果 羽化后未吸血组斑须按蚊唾液腺配子体激活因子活性与按蚊生长、发育呈同步变化 ;吸血后未产卵组按蚊唾液腺抽提物的配子体激活因子活性在吸血后显著下降 ,吸血后第 8天恢复到吸血前水平 ;而吸血后产卵组按蚊唾液腺抽提物的配子体激活因子活性在吸血后第 4天恢复到吸血前水平。结论 吸血后斑须按蚊唾液腺配子体激活因子的消长与按蚊产卵相关。

IL-2、IFN-γ在弓形虫感染小鼠脾细胞的活性动态

目的 研究小鼠感染RH株弓形虫后脾细胞的IFN -γ、IL - 2活性动态变化。方法 用 2× 10 3 个RH株弓形虫速殖子腹腔接种昆明小鼠 ,分别在感染前、感染后直至小鼠死亡每天随机取 5只鼠脾脏 ,用生物学检测法测定感染前、感染后鼠脾细胞IFN -γ、IL - 2的活性 ,结果用F检验进行统计学分析。结果 感染后第 2d、第 5d、第 7d小鼠脾细胞IFN -γ活性虽有升高 ,但各组均值与感染前比较均无显著性升高 (P >0 0 5 ) ,感染与未感染小鼠的IFN -γ活性无显著性改变 (P >0 0 5 )。鼠脾细胞IL - 2活性在感染前、后有显著性变化 (P <0 0 5 )。感染后第 3d、4d较第 2d、第 5d、第 7d显著性下降 (P <0 0 5 ) ,至感染后第 9d感染鼠全部死亡。结论 RH株弓形虫感染宿主后剌激宿主产生的内源性IFN -γ和高活性的IL - 2不能引起有效的保护性免疫 ,致使虫体大量繁殖 ,小鼠死亡。

GSS471/TX-100复配体系动态表面活性研究

用最大泡压法测定磺酸盐型双子表面活性剂1,4-丁二醇双子琥珀酸二仲辛酯磺酸钠（GSS471）与TX-100复配溶液的动态表面张力（DST）,详细表征了DST随时间的变化过程,研究了配比和浓度对其DST的影响,利用Rosen模型得出DST的n、t^＊、ti、tm和R（1/2）。结果表明,复配溶液浓度越高,吸附到界面的速率越快,介平衡表面张力值越小且越接近平衡值,DST曲线越低,且扩散势垒越小,吸附势垒越大,动态表面活性越高。当复配溶液形成大量胶束、n（GSS471）∶n（TX-100）=0.4∶0.6时,动态表面活性最好,且较两个单一表面活性剂的动态表面活性显著;当复配溶液形成微量或未形成胶束、n（GSS471）∶n（TX-100）=0.2∶0.8时,动态表面活性最好。

连接基长度对琥珀酸酯磺酸盐型双子表面活性剂水溶液动态表面张力及吸附动力学的影响

用最大泡压法测定了磺酸盐型双子表面活性剂乙二醇双子琥珀酸二仲辛酯磺酸钠(GSS271)、1,3-丙二醇双子琥珀酸二仲辛酯磺酸钠(GSS371)与1,4-丁二醇双子琥珀酸二仲辛酯磺酸钠(GSS471)在不同浓度下的动态表面张力(DST),详细表征了DST随时间的变化过程,研究了连接基对DST的影响,利用Rosen模型得出DST的n、t*、ti、tm和R1/2,用Ward-Tordai方程对吸附机理进行探讨。结果表明,连接基越短,GSS表面活性剂的动态表面活性越好;当浓度c<cmc时,GSS表面活性剂在吸附初期为纯扩散控制,吸附后期为混合动力扩散控制。

沙棘超氧化物歧化酶活性动态分析及热稳定性研究简报

SOD(超氧化物歧化酶)自1969年Mccord报道其作用活性以来,已证明它是生物界普遍存在的能消除过多超氧化物阴离子自由基的一种酶。有关这方面的研究利用的广泛迅速开展,使人们关心的热点集中在:(1)SOD在人体及动物体内的存在及其抗衰老、抗病毒、抗炎等药效酶的作用;(2)植物SOD的抗逆性及对人体的可利用性。我国靳月华等首先报道了沙棘SOD的存在及活性,指出沙棘果的SOD活性是人参叶的4倍。这引起了沙棘研究工作者的广泛重视。本研究在这方面开展了两项工作。

机器人操作器的动态灵活性测度

本文在加速度水平上讨论了机器人操作器的位姿灵活性,推导出操作器端部执行器的加速度和铰力关系方程;从此关系方程出发,并根据向量的广义相关性理论及 Moors-Penrose逆,文中提出了操作器位姿动态灵活性的两个度量指标——绝对动态灵活性及相对动态灵活性指标.

活性炭动态吸附ICP-AES法测定粗铅中的金

该文建立活性炭动态吸附-电感耦合等离子发射光谱测定粗铅中金的方法。通过实验确定粗铅样品的取样方法,采用硝酸-王水溶样-活性炭动态吸附富集金,这一过程可实现共存干扰元素的分离;灼烧灰化,以王水溶解金定容。在选定的仪器工作条件下采用电感耦合等离子体发射光谱(ICP-AES)测定其中的金含量。结果表明,方法检出限为0.066μg/g,标准加入回收率为96.0%～104.0%,相对标准偏差(RSD)为1.03%～4.01%,具有良好的准确度和精密度,测定结果与火试金测定结果吻合。该方法高效、环保,结果可靠,适用于大批量粗铅样品的测定。

急性颅脑损伤CPK活性动态变化及心电图临床分析

目的：探讨急性颅脑损伤CPK（血清肌酸磷酸酶）变化及心电图改变。方法：对78例急性颅脑外伤患者血清CPK含量在伤后10天内作动态观察及心电图改变，来判断损伤严重程度及预后。结果：脑外伤早期即出现CPK含量升高，1天达到高峰，且重型组血清酶含量明显高于轻中型组。三组间心电图均有改变，且重型组心电图发觉的发生率远高于轻中型组。结论：脑外伤后有一定程度的心肌损害，表现为血清CPK含量的活性改变，也可诱发交感神经递质释放增多引起心电图改变，通过观察CPK变化及心电图改变可判断损伤的程度及预后指标估计，为临床提供治疗依据。

计及线路-源-储灵活性的电力系统分层优化调度方法

当前关于系统灵活性提升的优化调度研究主要聚焦于量化灵活性需求或挖掘源-荷-储灵活资源供给,而未考虑通过线路提供传输支撑能力满足灵活性需求,提出计及线路-源-储灵活性的电力系统分层优化调度方法。基于线路动态增容技术计算线路动态传输容量,提出线路灵活性动态传输裕量,以量化线路传输灵活性;对火电、抽水蓄能和电化学储能的灵活性及调峰特性进行分析;构建以线路灵活性动态传输裕量及源-储灵活供给为机会约束条件的分层优化调度模型,优化机组出力并选择需要配置动态增容装置的线路。改进的IEEE39节点系统仿真结果表明,所提方法能够提高线路传输能力以及系统灵活性。

贵州东部低产田脲酶活性及其影响因素的研究

对黔东不同类型的稻田脲酶活性特征及其影响因素的研究结果表明:不同类型水稻土的脲酶激发容量和激发速率差别很大。高产田与低产田具有各自的脲酶活性动态曲线。影响脲酶活性的主要因素有土壤活性还原物质、全氮、有机质、全磷、物理性砂粒、pH、温度、基础铵量、基质浓度(尿素施用量)、有机肥料等,土壤活性还原物质高时,其对土壤脲酶活性的影响大大超过pH和有机质。这为生产上合理施肥提供了一定的科学依据。

活性炭吸附原子吸收光度法测定铅锑精矿中金的含量

通过在铅锑精矿焙烧时加入一定量的氧化锌或氧化钙,使铅锑精矿在灼烧过程中的单质硫、有机质、硫化物、碳充分焙烧,然后采用王水分解矿样,活性炭动态吸附富集金,灰化除碳,王水溶解,原子吸收光度法测定铅锑精矿中金含量,方法快速、准确,同时适用于含碳、硫较高焙烧时易结块的精矿样品。

Competitive Strategies of Two Species of Co-occuring Tadpoles

We examined the competitive ability of larval toads （Bufo gargarizans ） and frogs （Rana kukunoris ） which co-occur in natural pools in the Jiuzhaigou Nature Reserve. We measured the activity level, growth rate, mass at metamorphosis and larval period in a laboratory experiment. Tadpoles of B. gargarizans were significantly more active when food was abundant than scarce, while there was no significant difference in the activity of R. kukunoris tadpoles at different food levels. At low food availability, mass at metamorphosis and growth rate of R. kukunoris were significantly increased in the presence of B. gargarizans, whereas the presence of R. kukunoris had no significant effect on the mass and growth rate of B. gargarizans. In all treatments, the larval period of B. gargarizans at low food availability was the shortest. These results suggest that B. gargarizans can adapt to different food levels by changing their activity rate. At high food level, B. gargarizans increased activity to gain more food. At low food level, B. gargarizans decreased activity and achieved early metamorphosis. However, when food resources were limited, R. kukunoris could gain more food than B.gargarizans .

Environmental availability and ecological risk assessment of heavy metals in zinc leaching residue

Four different methods,namely mineralogical analysis,three-stage BCR sequential extraction procedure,dynamic leaching test and Hakanson Potential Ecological Risk Index Method were used to access the environmental activity and potential ecological risks of heavy metals in zinc leaching residue.The results demonstrate that the environmental activity of heavy metals declines in the following order：CdZnCuAsPb.Potential ecological risk indices for single heavy metal are CdZnCuAsPb.Cd has serious potential ecological risk to the ecological environment and contributes most to the potential toxicity response indices for various heavy metals in the residue.

大庆石油炼化厂废水深加工回用工程研究

为实现十一五大庆炼化石油节能减排,扩大再生产需要的高质量循环水和锅炉用水需要,用二次生化后排放污水经碟式过滤器——超滤—高级氧化——动态活性炭——动态生物膜沙滤+反渗透组合工艺处理废水回用生产。该工程规模600t/h,设计循环补充水量280t/h,锅炉用水补充量250t/h,是典型污水工厂管道化处理工程。工艺先进,设备板块简单,适应石油炼化、煤化工、钢铁、铜业电厂和城市污水深加工项目。

Effect of Combined Application of Manure and Chemical Fertilizer on the Dynamic Changes of Purple Soil Nutrient and Soil Enzyme Activities

[Objective] The aim was to study the effects of combined of manure and fertilizer on the content of nutrients in purplish soil as well as release dynamics of enzyme activities.[Method] The effects of manure and fertilizer application on the content of AOM,NH＋4-N and NO-3-N in soil as well as release dynamics of enzyme activities were studied by means of simulation culturing.[Result] In the treatments of combined application of simulation culture experiment,the content of active organic matters,NH＋4-N,NO-3-N and soil enzyme activities changed dynamically,which showed a shape of inverted ＂S＂ with two or more peaks.Compared with the treatment of fertilization,their peaks were relatively flat and occurred relatively late,while the treatment of fertilization had only one but the highest peak.The content of active organic matter came to top around 10 d in the order of cow5fertilizer5pig5fertilizer5cow manurepig manurefertilizer Ⅰfertilizer Ⅱ;the activity of urease came to top around 10 d in all treatments and in the order of pig manurecow5fertilizer5cow manurefertilizer Ⅰfertilizer Ⅱpig5fertilizer5.The activity of saccharase was in the order of pig5fertilizer5pig manurecow5fertilizer5cow manureCKfertilizer Ⅱfertilizer Ⅰ.[Conclusion] The study could provide the theoretical basis for reasonable application of manure and fertilizer.

Exo-glycosidases Activities in Artemisia sphaerocephala Mucilaginous Achene Germination Process

白沙蒿 (ArtemisiasphaerocephalaKrasch .)是中国西北沙区分布的多年生植物。瘦果遇湿后其粘液层开始膨胀。对其种子萌发不同阶段的种胚提取物中几种可能降解果皮外层粘液物质的外切糖苷酶进行了检测。结果表明 :β 吡喃半乳糖苷酶在干种子中的活性很高 ,但是随着种子的吸涨而逐渐降低 ,在已萌发的种子中无法探测到。α和 β 吡喃阿拉伯糖苷酶、β 吡喃葡萄糖苷酶以及 β 吡喃甘露糖苷酶在种子萌发过程的胚提取物中也显示出了一些活性 ,但是这些活性在种胚外却无法探测到。所有胚提取物中的外切糖苷酶都无法降解果皮粘液物质。所有的证据都表明果皮外层的粘液物质无法在种子萌发的早期被水解。因此果皮粘液物质在干旱沙质条件下的生态功能被限制在吸收水分以及延长胚吸水的时间。

Dynamic Changes of Nitrate Reductase Activity within 24 Hours

[Objective] The research aimed to study the circadian rhythm of nitrate re- ductase activity （NRA） in plant. [Method] The wheat plants at heading stage were used as the materials for the measurement of dynamic changes of nitrate reductase activity （NRA） within 24 h under the conditions of constant high temperature. [Resulti The fluctuation of NRA in wheat changed greatly from 20：00 pm to 11：00 am. The enzyme activity remained constant, but at 14：00 the enzyme activity was the high- est, higher than all the other time points except the enzyme activity measured at11：00. The enzyme activity was the lowest of 17：00, which was lower than all the other time points except the enzyme activity measured at 2：00. [Conclusion] There were autonomous rhythm changes of NRA in wheat in a certain degree.

新型碳基材料脱硫吸附剂的制备及研究

文章对椰壳活性炭吸附剂进行研究并对其吸附性能进行了评价,采用等体积浸渍法和混酸硝化对吸附剂进行改性,探究了其不同条件下的吸附效果,确定最佳操作工艺条件。

The Effect of Active Tectonic to Morphology of Alluvial Fan of Shahdad in Kerman-lran

The alluvial fan of the Shahdad in Derakt-Tangan River is one of the biggest alleviation in total dry area in the north eastern Kerman. This alluvial fan is formed effected by different materials erosion in drainage basin of Derakt-Tangan River and laying these materials in the final part of this drainage basin called Lut. Tectonics activate with efficacy in the place of the settlement of the alluvial fan. The region, which is being studied, is one of the active tectonic regions. The severe tectonic activities in the studying region have been proved by several observations. One of the most important evidences in the region is the various faults in the area and implies to fan alluvium （from head to end）, study line profile in past and present. The most important fault of the region is the great fault of ＂Nay band＂, the southern fault of Shahdad and the series of faults having the direction of north-western to south-eastern and northern and southern. The drainage basin of alluvial fan of the Derakt-Tangan River leads from east to Kavir-lut, from west to the Baghe-Bala Mountains and Kalisaky from The aim of this article is the morphology of Derakt-Tangan north to the altitutes of Dahran and from south to the mountains of Jeffan river fan indicative on neotectonics in the region.