铁磷熔体的氧化还原态和导电性能

用电导率电池测量了含钠铁磷模拟放射性核废料（HLW）熔体的电阻率,并分析了相应玻璃的Moessbauer谱,计算了铁离子的价态和氧化还原比,分析了温度、时间和氧化钠含量对熔体电阻率和玻璃氧化还原比的影响。结果发现：在Na2O含量低的熔体中,升温和降温过程的电阻率的变化是不可逆的：随着Na2O含量增加,不可逆性消失,熔体的电阻率随时间轻微下降。同时发现：Na2O3含量低的铁磷熔体的导电机理是电子性的,并且氧化还原比解释了其电阻率－温度曲线的不可逆性。铁磷模拟HLW熔体的电阻率类似于相近Na2O含量的钠铁磷系统熔体的电阻率。     

测定磷铁中钛的方法研究

探讨用二氨替比林甲烷不镀法测定磷铁中钛的分析方法，结果表明该方法能满足磷铁中钛含量在０．０５％－４％的测定。     

酸碱中和滴定法测定磷铁中磷的方法讨论

本文对酸碱中和滴定法测定磷铁中的磷的主要条件及效果进行试验,采用酸溶-碱回收的方法溶解试料,磷钼酸铵沉淀后酸碱滴定法测定磷含量。对试样分解条件、沉淀条件、过滤条件等进行了分析和讨论,并进行了实际样品的验证试验,试验结果表明该方法测定的灵敏度、准确度、精密度均能满足磷铁中磷的日常检验分析的要求。     

分光光度法测定Zn—Fe—P合金中的磷

采用磷钒钼黄分光光度法测定Ｚｎ－Ｆｅ－Ｐ合金镀层中的五价磷和低价磷含量。镀层中Ｐ＾５＋加标回收率９０％－１０５％之间，表明该方法准确可靠。     

磷化工副产磷铁的利用研究进展

磷铁是一种热法制磷及钙镁磷肥等生产过程中的副产物。磷矿资源愈加枯竭,因此合理回收利用磷化工产生的大量磷铁副产物便日渐重要。在简述磷铁的理化性质及磷铁利用现状的基础上,详细阐述了利用副产磷铁生产磷酸盐和氧化铁红、利用副产磷铁开发能源材料以及从磷铁副产中提取高价值金属3个方面的最新研究进展。最后,重点分析了磷铁综合利用的技术难点和限制因素,针对磷铁利用工艺所存在的问题提出了相应的思路和建议。     

Zn-Fe-P合金镀层中磷、铁含量影响因素的研究

采用自制的析磷助剂ＥＡ－Ｐ作为Ｚｎ－Ｆｅ－Ｐ合金镀层中的磷源,研究了Ｚｎ－Ｆｅ－Ｐ合金镀液组成及工艺条件对镀层中磷、铁含量的影响。在最佳工艺条件下,可得到磷、铁含量分另为０．６％左右和０．４％Ｚｎ－Ｆｅ－Ｐ合金镀层。腐蚀试验证明,经银白色钝化后的Ｚｎ－Ｆｅ－Ｐ合金镀层的耐蚀性能是Ｚｎ－Ｆｅ合金镀层的２倍以上。     

化学/生物联合工艺处理城市污水研究

采用聚合硅酸铁混凝剂，直接投加到反应器中(即投加混凝剂活性污泥法)，考察其对COD、氮、磷的去除效果，并与对生物反应器出水再进行混凝沉淀(即后混凝法)进行对比。结果表明：投加混凝剂活性污泥法,COD和TN的去除率略有提高，但两种工艺没有明显的区别；后混凝法对TP的去除率略高于投加混凝剂活性污泥法,但其出水中铁离子的含量远高于投加混凝剂活性污泥法，且需要增加一套混凝、沉淀设备，因此直接将混凝剂投加到生物反应器中比较适合于辅助除磷。     

综合回收利用磷铁的新工艺研究

提出一种回收利用磷铁的新工艺,并通过实验证明了该工艺的可行性.将磷铁和碳酸钠的混合粉末进行低温和高温两段氧化焙烧使磷和铁分离,然后浸取、过滤,滤液经浓缩、结晶、干燥制得磷酸三钠产品,滤饼经两次逆流洗涤、烘干制得氧化铁红产品.通过正交实验研究了物料配比、焙烧温度、焙烧时间对五氧化二磷转化率和氧化铁红产品中三氧化二铁含量的影响,并回归出模型方程.在最优工艺条件下,五氧化二磷转化率为97.10%,制得的磷酸三钠中十二水磷酸钠质量分数为98.43%,氧化铁红中三氧化二铁质量分数为96.67%.制得符合国家标准的氧化铁红(GB/T 1683-1989氧化铁红颜料)和磷酸三钠产品(HG/T 2517-1993工业磷酸三钠).     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.     

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.     

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。