酸性皂体系对皮肤脱脂力和刺激性研究

制备酸性皂基质,并测定了脂肪酸对酸性皂脱脂力的影响,结果表明,随着脂肪酸加入量增加,其皮肤脱脂力随之下降;将酸性皂分别与氨基酸表面活性剂和烷基糖苷复配,其皮肤脱脂力变化趋势与酸性皂相同,为酸性皂氨基酸洁面膏的开发提供理论依据。由酸性皂配制的洁面膏产品,斑贴实验结果显示,其安全性与市售纯皂基洁面乳和纯氨基酸洁面乳相同,对皮肤均无刺激性,清洁能力优于纯氨基酸洁面,是一款性能较好的洁面膏产品。     

超微细沉淀法白炭黑制备研究

本文叙述酸性硅溶胶两步法制白炭黑工艺,产品物化性能及橡胶补强性能与VN_3样品相当。     

印制电路板电镀铜添加剂的研究进展

简述了高密度印制板的关键技术——酸性镀铜,列举了目前运用较广的印制电路板酸性镀铜添加剂产品,介绍了酸性镀铜添加剂的常规组成及其电化学行为。通过对运用于印制电路板电镀的酸性镀铜添加剂的研究进展的综述,认为寻求更新的添加剂复配技术以及开发单体性能更为优秀的中间体是满足目前印制电路板酸性镀铜要求的重要途径。     

酸性助剂对催化剂及RFCC原料油裂化性能影响的研究

本文考察了酸性助剂对催化剂及RFCC裂化原料裂化性能、汽油和柴油主要性质的影响。试验结果表明，RFCC原料加入适量的酸性助剂后，催化剂微反活性提高3～4个单位，轻质油收率提高3%～4%(wt)，产品分布得到改善,所加入的酸性助剂不会进入产品中。酸性助剂用量最佳值在0.25%～0.35%(wt)间，其用量与所处理的原料和使用的催化剂有关。同时发现，酸性助剂不仅适用于国产催化剂，也适用于进口催化剂，具有广泛的适用性。     

强酸性树脂催化合成正丁酸烯丙酯的工艺研究

利用强酸性阳离子交换树脂催化合成了正丁酸烯丙酯,由实验可知:反应的酸醇量比为3:2,树脂催化剂用量为1.0g时,反应效果最佳,产品收率可达67%.同时,对树脂的重复使用性能进行了测试,结果表明:树脂在使用7次后,其催化性能保持不变.通过与其他催化剂的催化效果进行比较,说明了强酸性树脂在合成正丁酸烯丙酯的独特优越性。     

中华人民共和国国家标准 染料产品命名原则(毛用染料部份)

本标准适用于毛用染料产品的命名 1 染料产品名称的组成染料产品的名称,采用三段命名法命名,由冠称、色称和尾称组成。 1.1 冠称按染料的应用和性能分为酸性、弱酸性、酸性媒介、酸性络合、中性和活性等。 1.2 色称表示染料色泽所在的色区。     

马来酸酐改性蔗糖酯的制备及性能

为了克服蔗糖酯的水溶性差和有盐与酸性条件下乳化性能差的缺陷,该文采用马来酸酐对硬脂酸蔗糖酯进行改性,在硬脂酸蔗糖酯分子中引入羧基,设计合成了阴离子-非离子两性表面活性剂马来酸硬脂酸蔗糖酯(Sucrose stearate-maleate,MSS)。通过1HNMR和ESI-MS确证了产品结构。与硬脂酸蔗糖酯相比,MSS具有优良的水溶性。在酸性和有盐条件下,MSS的乳化性能较硬脂酸蔗糖酯得到了显著提高。同时发现,MSS还具有优异的硬水稳定性(5级)。     

三羟甲基丙烷油酸酯的合成及其抗乳化性能研究

以三羟甲基丙烷和油酸为原料,合成了三羟甲基丙烷油酸酯。研究了催化剂种类、催化剂用量、反应温度及反应时间对产品酯化率的影响,并考察了后处理方法对产品抗乳化性能的影响。研究结果表明,采用固体超强酸为催化剂,酯化率可达92%以上;采用酸性白土处理产品,能有效改善产品的抗乳化性能。     

新型EPM无酸性玻璃密封胶产品在武汉研究成功

近日由武汉现代工业技术研究院研究成功了一种新型ＥＰＭ无酸性玻璃密封胶。虽然目前常用的酸性硅酮密封胶产品综合性能较好 ,但生产工艺较复杂 ,在生产过程中和成品包装时都需抽真空 ,所以造成设备投资大 ,生产周期长 ,综合成本高。另外 ,还存在使用中酸味很大、对人体有一定的毒性及此胶的存放期短等缺点。新型ＥＰＭ无酸性玻璃密封胶的研究成功 ,解决了酸性硅酮密封胶产品所存在的问题 ,该新型密封胶是采用多种高分子材料经改性制成 ,产品生产工艺简单 ,设备投资少 ,生产成本比酸性硅酮胶低 5 0 %左右 ,并在使用中无酸味 ,存放期可长达 2…     

成都开华化工研究所

正作为表面处理产品的研发、生产和销售的专业公司,开华拥有高素质的专业人才,为客户提供完善的技术服务,同时建立了严格的质量管理与保证体系,通过了ISO9001认证。开华以全新的服务带动优质的产品,以优质的产品促进与客户的共同发展。开华—您值得信赖的品牌!重点产品介绍:ZF302/ZF303酸性光亮镀锡添加剂光亮度好,光亮范围宽,深镀能力与整平性能优良,出光速率快。可焊性能、防变色性能好,特别适宜于电子元器件或五金装饰件光亮电镀纯锡。镀液稳定,能满足高强度连续运转,镀液不会浑浊,勿须再用稳定剂。     

Sapindaceae,cyanolipids, and bugs

Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA.     

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.     

2008～2009年世界塑料工业进展

收集了2008年7月～2009年6月世界塑料工业的相关资料,介绍了2008～2009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、环氧树脂、不饱和聚酯树脂)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。     

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.     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.