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Search Results: 1 - 10 of 21950 matches for " 杜小弟 "
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小兴安岭东南部晚二叠世地层新认识
金建华,小弟
煤田地质与勘探 , 1993,
Abstract:
二步水解法制备凝胶渗透色谱用聚甲基丙烯酸标样
Preparation of Monodispersed PMAA for GPC Calibration Standards by Two-Step Hydrolysis
 [PDF]

郭丽萍, 徐丹, 小弟, 张安富, 雷家珩
Advances in Analytical Chemistry (AAC) , 2012, DOI: 10.12677/aac.2012.21001
Abstract: 采用二步水解法水解单分散GPC用聚甲基丙烯酸甲酯标样,核磁共振测得其水解率达99%,制得的聚甲基丙烯酸钠经酸化析出后得到聚甲基丙烯酸标样。该聚甲基丙烯酸标样以磷酸盐缓冲水溶液为流动相,采用PLaquagel-OH mixed-H柱串联测得的GPC色谱峰峰形对称,半峰宽窄,分散系数均小于1.3,具有很好的单分散性。粘度法测得其Mη与通过聚甲基丙烯酸甲酯标样参数计算得到的Mη'平均相对误差小于10%,表明水解对聚甲基丙烯酸甲酯主链的聚合度无明显影响。因此,可以用聚甲基丙烯酸甲酯标样的分子量计算得到相应聚甲基丙烯酸标样的分子量。
Hydrolyzed monodisperse polymethyl methacrylate for GPC calibration standards by two-step hydrolysis, the degree of hydrolysis reached 99% measured by nuclear magnetic resonance analysis (NMR).The obtained monodisperse polymethylacrylic acid-Na transformed to polymethylacrylic acid by acidification. The polymethylacrylic acid with phosphate buffer solution as mobile phase, used PL aquagel-OH mixed-H columns in series, GPC figures had symmetrical peak shape, narrow half-peak, dispersity were all less than 1.3. Viscosity average molecular weight (Mη') of polymethylacrylic acid calculated by hydrolysis formula compared to the actual results measured by viscosity meas-uring method (Mη), the average relative error were less than 10%, which indicated the hydrolysis did not effect on the degree of polymerization of the main chain. Therefore, we can calculate molecular weight of polymethylacrylic acid from the corresponding molecular weight of polymethyl methacrylate.
塔里木盆地震旦—泥盆纪古海平面变化再造及形成机理分析
小弟,王璞君,匡立春,王东坡
沉积学报 , 1997,
Abstract: 根据对塔里木盆地露头剖面的层序地层学研究,建立了震旦—泥盆纪古海平面变化曲线。详细分析了氧同位素记录与海平面变化之间的关系,得出了氧同位素值的增大、减小反映着古海平面的下降、上升的变化的结论。用氧同位素分析结果验证了根据层序地层分析所建立的海平面变化曲线的正确性。并利用氧同位素分析结果定量计算了古海平面的变化幅度。最后阐述了古海平面变化的形成机理。
重铬酸钾测铁的方法比较及其环境经济效应
刘丹,小弟,鲁茜,马丹,雷家珩
武汉理工大学学报 , 2012,
Abstract: ?对k2cr2o7测定水泥生料中铁的还原剂sncl2-hgcl-2、sncl2-ticl3、锌粉以及铝片进行了分析和比较。结果表明,采用铝片作还原剂没有汞盐等重金属的污染,且该方法操作简单,结果可靠,成本低廉,适用于生产部门的常规检测和量大面广的实验,是一种绿色的化学检测方法。
ANALYSIS AND MODELING OF HYDROCARBON ACCUMULATION
油气成藏分析与数值模拟――以乌尔逊凹陷北部为例

SHANG Er-jie,
尚尔杰[
,],姜正龙[],小弟[]

天然气地球科学 , 2004,
Abstract: In order to study hydrocarbon accumulation, the studying object, the train of thought and the technique of modeling are discussed. As an example, the hydrocarbon accumulation of north of Wuerxun depression is modeled after the geological model is established. The result is that the source rocks suffered three main periods of hydrocarbon generation and accumulation, but the second is the key of hydrocarbon generation and accumulation. After the hydrocarbon accumulation modeling, the process is reconstructed and it is easier for the key to be ascertained. We can go deep into discussing the hydrocarbon accumulation.
元素地化-数理统计法在松南陆相沉积盆地分析中的应用
王璞珺,刘招君,刘万洙,小弟
沉积学报 , 1991,
Abstract: 对松辽盆地南部的W3井和SN—15井的三百余块泥岩样品的11种常量元素及16种微量元素进行了分析。对测得结果进行数理统计处理,用以划分地层、分析沉积旋回和研究沉积相。分层结果与岩屑录井及电测曲线分层结果相互验证,互为补充。结论认为泉四段顶部的绿色泥岩实应归属青-段,并确定姚家组中段-套红绿互层的泥质岩为浅湖泥坪环境沉积产物。
新疆卡特巴阿苏金铜矿床成矿构造环境
亚龙,李智明,王立社,姜寒冰,小弟
地质论评 , 2015,
Abstract:
内蒙古乌兰赤海铁矿矿床地质特征及成因
张洲远,李智明,全守村,杨建国,亚龙,小弟
地质论评 , 2015,
Abstract:
新疆新源县卡特巴阿苏金铜矿床地质特征及成矿期次初探
小弟,亚龙,张洲远,李智明,王立社,姜寒冰
地质论评 , 2015,
Abstract:
游离硅酸对离子交换法测水泥中so3的干扰及误差分析
张磊,郭丽萍,小弟,张绪清,陈刚,雷家珩
武汉理工大学学报 , 2013,
Abstract: ?针对离子交换法测水泥中so3的误差问题,采用icp-es测定和比较了gb/t176―2008和gb/t176―1976新旧两版标准中离子交换体系游离硅酸的溶出量,通过电位滴定和理论计算讨论了硅酸产生干扰的机理和消除干扰的措施。新版国标(gb/t176―2008)离子交换法提取so3时,体系中游离硅酸含量增加到约15mg(以sio2计),使得体系酸碱滴定化学计量点的ph降低至7.0以下,且终点的突跃范围缩小。变色域为8.0~9.6,显著高于化学计量点和突跃范围,从而导致滴定结果偏高,系统误差可达+0.65mg(以so3质量计),且终点变色不明显,不确定度增大。若选用变色点为ph=4.3~7.5范围的酸碱指示剂,可避免硅酸的干扰,so3测定结果的误差可控制在±0.1%以内。
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