高纯粉石英产品全分析方法的研究

本文研究了发射光谱法测定Fe2O3、Al2O3、CaO、MgO、MnO、NiO、TiO2和火焰光度法测定K2O、Na2O，然后以差减法得出SiO2含量。实验结果与氢氟酸挥发法测定结果及外检结果相符。     

ICP-AES快速测量长石的化学成分

为了快速测定长石的化学成分,对一些操作参数进行了实验分析,通过分析结果,认为采用ICP-AES仪器可准确快速测定出长石中Al2O3、CaO、Fe2O3、K2O、MgO、Na2O、TiO2的含量.     

不同氧化物对磷酸盐玻璃结构与性能的影响

在化学组成为40Na 2O·60P2 O 5的基础上,用CaO、MgO取代Na 2O或用Al2 O 3、B 2 O 3和SiO2取代P2 O 5制备5种磷酸盐玻璃体系,用X射线衍射(XRD)和傅立叶变换红外光谱(FTIR)对玻璃结构进行了表征,并测定了该玻璃体系样品的密度、化学稳定性等基本性质。研究发现,用CaO取代Na 2O和Al2 O 3取代P2 O5可以显著改善玻璃的化学稳定性;用SiO2取代P 2 O 5时,玻璃的化学稳定性下降;由于配位问题,B 2O 3和MgO对磷酸盐玻璃结构与性能的影响出现转折点。     

白云岩中Fe_2O_3、CaO、MgO的连续测定

白云岩中通常测定Fe2O3、CaO、MgO,传统的方法溶矿和测定都较繁琐冗长,不适合例行测试,笔者通过在对碱熔溶液进行理论研究和大量的实验的基础上,对白云岩标准物质同一溶液中用EDTA标准溶液连续测定Fe2O3、CaO、MgO方法进行了探索和偿试,同一溶液中以控制酸度的方法来实现EDTA连续测定Fe2O3、CaO、MgO的含量,其结果与分测值相符,精密度和重现性都较好。     

脱硫剂组分的分析

介绍了常用脱硫剂中的Fe2 O3、ZnO、MgO、Cr2 O3 及CaO等组分的化学分析方法和某些市售脱硫剂的分析结果     

CaO/MgO摩尔比对太阳能电池封装玻璃性能的影响

利用普通Na2O-CaO-SiO2玻璃体系,通过调整CaO/MgO摩尔比,针对太阳能电池用封装玻璃组分的性能,研究了不同CaO/MgO摩尔比对玻璃软化温度、转变温度、膨胀系数及高低温黏度的影响规律,探讨了不同CaO/MgO摩尔比值对玻璃力学性能的影响。     

电感耦合等离子体原子发射光谱法测定—高铝质、粘土质熟料中主次成分、微量成分

采用电感耦合等离子体原子发射光谱法(ICP-AES)同时测定高铝质、粘土质熟料中Al2O3、SiO2、Fe2O3、TiO2、CaO、MgO、K2O、Na2O等主量及微量成分。通过实验确定了熔样方法,仪器最佳参数,ICP分析条件、分析谱线等。结果表明该方法的相对标准偏差<3%,测定值与标准值一致。     

X射线荧光光谱法测定铁矿石中主次量组分

建立用X-射线荧光光谱法同时测定铁矿石中主次量组分(TFe、SiO2、Al2O3、MgO、CaO、Na2O、K2O、TiO2、MnO、P)的快速分析方法,在优化条件下,采用国家标准样品建立的标准工作曲线和基体校准一体回归方程进行谱线重叠干扰和基体效应校正,对国家标准物质及样品进行重复测定,分析结果与标准值吻合,相对误差RE不超过5％,相对标准偏差RSD不超过5％.该方法具有较好的准确度和精密度,能满足快速分析的需要.     

ICP-OES法分析高铝质耐火材料中次量及微量成分

采用电感耦合等离子体发射光谱(ICP-OES)法同时测定高铝质(w(Al2O3)>75%)耐火材料中SiO2、Fe2O3、TiO2、CaO、MgO、K2O、Na2O等次量及微量成分.通过试验确定了熔样方法、仪器最佳工作参数、ICP分析条件、分析谱线等.结果表明,该方法的相对标准偏差<3%,测定值与标准值一致.     

用X荧光分析仪熔片法来控制水泥混合材掺量

水泥粉磨厂家控制混合材掺加量一般用水泥组分测定仪,但由于此方法操作复杂、时间长,不能及时地掌握混合材掺量的变化。本文利用X-荧光仪制定水泥成分测定程序,采用熔片法测定水泥中的CaO、SiO2、Al2O3、Fe2O3、MgO、K2O、Na2O含量来计算混合材掺量。本文讨论了标准样品的选取,确定了最佳制样条件和分析条件,建立水泥测定程序。通过精密度、准确度实验和两种实验方法的比较,表明X-荧光分析法方便快速、准确可靠,可正确指导水泥配料生产。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.