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青花瓷以其釉色晶莹,发色青翠,青白相间,幽静典雅、清新质朴的特色,成为陶瓷装饰艺术中最具民族特色的一个门类,其绘画以平涂为主方法,结合勾、皴、点、染技法,线条苍劲有力,笔法细腻传神,线条活泼流畅,粗细兼备,料色浓淡兼施,极富中国传统水墨画韵味,深受人们的喜爱。 相似文献
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化工生产原料、中间体和产品是在生产装置内加热、混合、反应、分离、冷却和储存的,物料不能离开装置而独立存在,因此,化工火灾中装置与设备是燃烧的主体。化工生产装置具有处理物料易燃、易爆、有毒,设备种类多,压力容器多,工艺管线多、阀门多,物料处理量大,操作控制难,设备高低不同,设备材质多样的特点,危险性大,一旦着火扑救困难,而且容易发生二次着火、爆炸,容易造成人员窒息和中毒,所以必须引起高度的重视。研究石油化工装置火灾扑救对策,有效控制和扑救化工生产装置火灾,有着十分重要的意义。 相似文献
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我公司成立于1973年,位于广州市西北郊,紧靠珠江支流石门河畔,是自立项目、自筹资金、自负盈亏的集体所有制企业,公司属下有两个生产厂,年生产能力为180万吨。我公司视产品质量为企业的生命,不断吸收、消化国内外先进的生产技术,采用现代化的生产工艺和设备,配以严格、高效的管理体制,使产品质量始终维持在优质的水平,多次荣获市优、省优、部优产品称号,是国家免检产品、广东省名牌产品以及广东省著名商标。我公司一贯重视企业形象塑造和企业文化建设,投入大量资金进行园林式厂区建设, 相似文献
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发展煤炭循环经济产业,延长煤炭产业链,煤炭、化工、电力、建材行业有机结合,深加工成高附加值产品,缓减石油紧张的压力,同时减少燃煤在一次能源中的消耗量。积极发展新型煤气化工业,做到高效率、低污染、新技术、大型化。保护生态环境,实现能源的可持续发展,创造和谐生态工业基地。 相似文献
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陶瓷是中国的特色文化,亦称之为国粹。进入80年代,陶瓷艺术的发展已经发生了巨大变化,已经由相对单一的传统创作。进入了全新的综合装饰艺术领域,时至今日,称的上是百花争艳,各领风骚,名家倍出,推陈出新,其优秀的表现手法主要为——青花釉里红、青花斗彩、青花影青、珐琅彩、新彩、高温色彩,珊瑚描金,堆花加彩以及色彩堆花等等。 相似文献
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遇到了这么一群人,他们质朴、热情、平易近人;结识了这么一群人,他们勤奋、进取、勇于奉献。是怎样的经历让他们走到了一起,是怎样的信念让他们奉献于他们共同为之奋斗的事业。走近了他们,熟识了他们,才知,是共同的追求——“树民族品牌,做百年企业”,是对企业核心文化——“创新、和谐、共同成长”的认同和对事业的孜孜以求,使他们同呼吸,共命运,组成了和睦、团结、进取的大家庭,共同谱写着展辰达的辉煌篇章…… 相似文献
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乙二醇,别名甘醇,英文名Ethylene Glycol,简称EG,是最简单的脂肪族二元醇,外观为无色透明粘稠液体,作为一种重要的基础石油化工原料,乙二醇可以衍生出100多种化工产品和化学品,主要用于生产聚酯纤维、防冻剂、不饱和聚酯树脂、润滑剂、增塑剂、非离子表面活性剂等,以及用于炸药、涂料、油墨等行业,此外,还可用于生产特种溶剂乙二醇醚等,用途十分广泛。目前全世界乙二醇总产量已超过2000万t,三分之一的市场需求在中国。 相似文献
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M. S. J. Simmonds W. M. Blaney F. Delle Monache M. Marquina Mac-Quhae G. B. Marini Bettolo 《Journal of chemical ecology》1985,11(12):1593-1599
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. 相似文献
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Cheng-Le Zhao Shane Porzio Alan Smith Haiyan Ge H. T. Davis L. E. Scriven 《Journal of Coatings Technology and Research》2006,3(2):109-115
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. 相似文献
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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. 相似文献
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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. 相似文献
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中蓝晨光化工研究院有限公司《塑料工业》编辑部 《塑料工业》2009,37(3)
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. 相似文献
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中蓝晨光化工研究院《塑料工业》编辑部 《塑料工业》2007,35(3):1-25,67
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。 相似文献