日本陶瓷砖标准解析

本文介绍了日本陶瓷砖标准在分类、技术要求和试验方法等方面的要求,分析了日本标准与我国标准的主要差异性,指出了日本标准中值得借鉴之处。     

美国陶瓷砖标准解析

主要介绍了陶瓷砖美国国家标准ANSIA137.1-08在分类、技术要求、试验方法以及包装标识等方面的主要要求,分析了美国标准与我国标准的主要差异性,指出对美出口产品应注意的一些问题。     

世界贸易组织贸易技术壁垒协定与食用化学品标准化

介绍了世界贸易组织及贸易技术壁垒协定的主要内容、相关的法规和标准。指出我国食用化学品标准要适应市场经济 ,与国际惯例接轨。主要体现在 :①食用化学品技术法规要适应国际惯例要求 ;②要采用国际标准和国外先进标准 ;③加强质量管理 ,提高产品质量 ;④食用化学品标准要求更加透明性。对我国食用化学品企业提出了建议。     

我国压力容器标准和ASME规范的比较分析

主要从标准技术要求方面对我国压力容器标准和ASME规范进行了对比分析 ,详细描述和分析了两个标准体系相关标准的主要差别和相互对应关系 ,旨在探讨如何深入理解和使用ASME规范     

浅析国内外对于"仿瓷餐具"技术要求的差异

介绍了我国标准和欧盟、美国和日本食品接触材料法规对于密胺、脲醛模塑制品的技术要求,对其主要差异进行了对比分析.     

我国植保无人飞机相关标准制定与规范内容分析

随着植保无人飞机施药技术在我国病虫草害防治中的广泛应用,我国植保无人飞机行业主管部门、社会团体和科研院所积极推动了各类标准制定。截至2022年,我国共有植保无人飞机相关标准80项,包括行业标准5项、地方标准34项和团体标准41项。标准内容主要涉及植保无人飞机质量和安全施药技术,植保无人飞机施药防治不同作物病虫害施药技术规程或施药技术指南。本文总结、分析了我国植保无人飞机现行标准中植保无人飞机相关术语和定义、植保无人飞机作业前、作业时、作业后工作要求等方面的主要内容,对明确我国植保无人飞机相关标准的发展方向与趋势,促进植保无人飞机在我国的健康、快速发展和应用提供理论指导。     

《中空玻璃密封胶》团体标准解析

详细阐述了中国建筑玻璃与工业玻璃协会团体标准T/ZBH 004—2018《中空玻璃密封胶》的编制目的、依据及主要内容,该标准技术要求、指标和试验方法在参照国内外先进标准的基础上,提出更加科学、合理、全面的要求,有助于提升我国中空玻璃密封胶产品质量,为建筑安全节能提供技术支持。     

英、美等国最新水泥标准简介

随着我国水泥出口的增加,不少单位要求了解世界上主要国家的最新水泥标准。我们结合五大水泥标准GB175和GB1344的修订编译了英、美等六国的最近标准供有关方面参考。     

浅谈轻工企业如何提高产品标准水平

随着我国经济发展水平的不断提高,我国轻工业取得了显著的发展,并随着产品生产水平的提高,对企业产品标准也有了更高的要求。企业的产品质量标准和产品质量密切相关,提高产品标准水平也是企业发展的重要内容。本文主要分析了轻工产品企业的产品标准,并提出了提高产品标准水平的几点建议。     

《磷肥工业水污染物排放标准》修订浅析

针对我国磷肥工业污染物防治技术的进步和国家对环境保护的严格要求,国家环境保护部科技标准司提出了修订《磷肥工业水污染物排放标准》。介绍了新标准的适用范围、体系结构、主要修订内容和水污染物排放控制要求,并与国外相关标准对比,认为修订后的新标准指标值宽严得当、便于实施,推动了磷肥行业可持续发展。     

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。