智能型pH在线监控仪在废水处理工程中的应用

本文介绍以微型计算机为核心的中文智能型ｐＨ在线监控仪及其在废水处理工程中的典型应用。重点介绍仪器设计特色、软硬件结构、系统配置模式,详述多个废水处理工程ｐＨ监控系统并给出设计思路     

中文智能型pH在线监控仪及其在SBR工程中的应用

本文介绍了以单片微机为核心的中文智能型ＰＨ在线监控仪的结构，软硬件配置及其在污水处理中的应用，本仪器为工业，农业和环保行业进行ＰＨ在线监控提供有效的技术手段。     

镀液pH值在线自动控制器的研究

介绍了镀液ｐＨ值在线自动控制器的基本原理和构成，使用该控制器可以实现镀液ｐＨ值的在线自动检测与自动控制。该控制器具有结构合理，控制精度高，价格低，使用方便等特点，具有很好的社会经济效益。     

水质中钙,镁和硬度的在线监测

对水质中钙、镁和硬度的在线监测方法进行了研究。利用稳定性好、灵敏度高的偶氮氯膦Ⅲ作显色剂,在ｐＨ７０时,加入ＥＧＴＡ掩蔽钙,测定镁;在ｐＨ为２５,掩蔽镁的干扰,测定钙,在线分析时,采用混合分析流程,加三通分流消除气泡干扰,测定数据稳定可靠,镁的测试范围１×１０－３～４８×１０－３ｍｍｏｌ／Ｌ,钙的测试范围１×１０－３～５０×１０－３ｍｍｏｌ／Ｌ,钙镁的检测限０５×１０－３ｍｍｏｌ／Ｌ,该方法开发成在线仪器,可单独测定钙、镁,又可根据水样得到水质硬度,具有较好的实用性。     

在线监控技术在循环水系统的应用

针对循环冷却水高浓缩倍数节水运行时存在的问题,从循环水结垢腐蚀在线检测、微生物在线监控、自动化管理等方面,把在线监控技术与传统化学方法有机结合,达到循环水高倍率安全运行,节水效果明显.     

风机机组群的在线状态监测与控制系统

介绍了风机机线群的在线状态监测与控制系统，论述了监控原理，并详细讨论了系统的构成和硬件，软件的设计方法。     

风机机组群的在线状态监测与控制系统

介绍了风机机组群的在线状态监测与控制系统，论述了监控原理，并详细讨论了系统的构成和硬件、软件的设计方法。     

工业污水水质及排放总量在线实时监控系统

介绍一种实用的工业污水水质及排放总量在线实时监控系统，论述系统的结构、功能及软件设计方法。     

基于感应线技术的废物填埋场在线渗漏定位监测系统

为实现填埋场防渗层的完整性检测,开发了基于渗漏感应线技术的填埋场在线渗漏定位监测系统。系统由渗漏检测层、通风系统、检测系统和监控平台组成,具有渗漏孔自动定位、自动报警、 24 h连续监控、数据管理等功能。     

制药废水处理中pH值的测量

就制药废水处理ｐＨ值测量的重要性，困难性进行分析，并针对我厂的实际测量经验，对ｐＨ值的测量与控制进行介绍。     

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。