2003年世界化学工业

2003年上半年,伊拉克战争、SARS等非市场因素和高原料成本、高能源价格,使刚刚出现复苏迹象的世界化学工业遭受巨大打击,直至下半年全球化学工业才开始恢复。尽管2003年全球经济复苏的预期没有实现,但美国已经起跑,欧洲正在热身,日本回升进程加速。尤其值得注意的是,在中国经济快速增长的带动下,亚洲正引领世界经济的发展,全球各国家和地区的化学工业出现了不同程度的增长。     

新一年,新十年

<正>2009年已悄然离去,过去一年,各行各业可谓是喜忧参半。受经济危机影响,上半年,行业和企业遭遇经济寒冬,经营惨淡;下半年,世界经济开始缓慢回暖,我国经济率先复苏,企业经营状况逐渐好转。塑料行业,在全体从业者齐心协力、艰苦奋斗下,很快就走出发展低谷。虽然尚未完全摆脱困难,但     

2021年国内外宏观经济形势回顾与2022年展望

2021年,世界经济从疫情重创后的深度衰退中缓慢复苏;我国率先走出疫情对经济社会的巨大冲击,经济恢复领先于世界主要国家.展望2022年,全球疫情总体趋于可控,预计世界经济继续复苏;我国将继续统筹疫情防控和经济社会发展,兼顾短期经济平稳增长和中长期高质量发展,实现发展新跨越.     

新一年，新十年

2009年已悄然离去,过去一年,各行各业可谓是喜忧参半。受经济危机影响,上半年,行业和企业遭遇经济寒冬,经营惨淡;下半年,世界经济开始缓慢回暖,我国经济率先复苏,企业经营状况逐渐好转。塑料行业,在全体从业者齐心协力、艰苦奋斗下,很快就走出发展低谷。虽然尚未完全摆脱困难,但是整体经济的景气指数向好。     

需求恢复，主要指标大幅增长——2023年上半年橡胶行业运行状况分析

<正>2023年上半年，我国经济社会全面恢复常态化运行，生产稳步恢复，市场需求逐步扩大，经济循环畅通，供求关系逐步改善，经济恢复向好。但世界经济复苏乏力，主要经济体为抑制高通胀，采取收紧货币政策，加剧了全球需求的收缩。上半年，橡胶行业经济运行呈现恢复向好态势，主要经济指标现价工业总产值、销售收入、出口交货值实现较大幅度的增长，行业整体效益持续好转。     

2013年国内天然橡胶市场回顾与2014年展望

2013年，世界经济继续呈现缓慢复苏态势，增长乏力。货币宽松政策盛行，发达国家经济缓慢复苏，新兴市场国家与发展中国家经济增速普遍放缓。国内经济运行虽然稳中向好，但仍旧面临诸多难题，经济运行存在一定的下行压力，受复杂多变的国内外经济环境影响，我国天然橡胶市场价格延续上年的回落走势，大幅震荡下行，屡创历史新低。     

高油价促升石化原料价位石化市场持续强势--世界石化品市场2004年上半年评述及三、四季度展望

持续强劲的世界经济复苏极大地提升了石化产品的需求增长。世界石化市场持续复苏和国际油价高涨,使2004年上半年主要石化产品价格大幅度上升后,始终稳定在上升通道内波动。石脑油、苯乙烯、纯苯、聚苯乙烯、丙烯及聚丙烯的价格走势令人瞩目。加上石化新增生产能力有限,世界石化市场持续强势局面已经形成。     

2022年大宗商品价格走势和2023年展望

2022年，国际主要大宗商品价格市场经历了先涨后跌走势。上半年，地缘冲突导致供给端不确定性激增，主要大宗商品价格迅速上扬；下半年，随着主要经济体相继收紧货币政策，世界经济复苏趋缓，大宗商品整体供求关系偏向于宽松，价格主要影响因素从上半年的供给冲击转向需求下降，大宗商品价格逐步回调。2023年，极端气候、乌克兰危机仍将给大宗商品供给带来不确定性影响，且由于产能限制、前期投资不足，能源供给增速仍受限制。在需求端，主要经济体韧性超出预期，中国经济复苏可望提振全球原油需求，尤其是中国经济企稳向好将有利于带动工业金属等大宗商品需求回升。     

夯实基础,把握机会谋求发展

<正>2011年上半年我国和世界经济环境面临诸多不确定性、不稳定性因素。日本大地震引发日本经济受挫、美债和欧债危机拖后世界经济复苏、国内经济结构调整和抑制通货膨胀的系列政策出台、GDP增速     

2009年5月份塑料市场点评

目前世界经济复苏沿未有明朗的迹象,经济复苏道路上还存在着很多障碍,美欧一些发达国家消费收缩、失业率上升以及金融系统的不容乐观等因素仍困扰着经济复苏的步伐,油价的攀高也给经济复苏发出了警报.     

Reactions in Stabilizer and Between Stabilizer and Nitrocellulose in Propellants

HPLC analysis of the stabilizer is one of the major methods in use for surveillance testing of diphenylamine (DPA) stabilized propellants. Often 0.2% DPA is used as a minimum content for safe propellants. In most cases the propellant can be stored much longer after this limit has been reached without any risk for self‐ignition. We report here about a reaction where DPA bonds to nitrocellulose, leaving a non extractable aromatic stabilizing compound left in the propellant, resulting in a longer time to autocatalysis than predicted. Diphenylnitramine is discussed as a possible intermediary compound occurring from the reaction between DPA and nitrocellulose. This should add to a better understanding of the degradation processes in propellants.     

中国台湾的催化和催化剂的研究开发

本文重点介绍了台湾省各大学和研究院所对催化及催化剂的教学。研究与开发方面动向,相关催化方面学科带头人的研究领域和主要成果,并给出大量参考文献。     

Designer enzyme and cell applications in industry and in environmental monitoring

Renewed world interest in enzyme biotechnological industries now derives from the expectation that many new biocatalysts will be created by genetic engineering associated with protein engineering designer techniques, or by chemical modification of existing enzymes by use of protein tailoring methods. The biocatalysts produced are mainly enzymes, abzymes (catalytic antibodies) and synthesis (synthetic analogues or mimics), and these will be used in industry, synthesis, therapy: and in bioanalysis of components of foodstuffs, and the environment including water, air and soil. The biocatalysts, including whole cells, are firstly incorporated into a particular bioreactor form by use of enzyme engineering techniques such as immobilization, and are then used, as appropriate, to modify their substrates. Improved processing or enhanced products are thereby achieved in the case of manufacturing industry: or monitoring signals are generated, often in the form of a measurable change in current flow, in the case of environmental biosensors. Designer enzymes and cells can be made now for identified applications where the presently available biocatalysts are inadequate, incompatible or uncompetitive.     

Differences in color naming and color salience in Vietnamese and English

The accepted model of color naming postulates that 11 “basic” color terms representing 11 common perceptual experiences show increased processing salience due to a theorized linkage between perception, visual neurophysiology, and cognition. We tested this theory, originally proposed by Berlin and Kay in 1969. Experiment 1 tested salience by comparing unconstrained color naming across two languages, English and Vietnamese. Results were compared with previous research by Berlin and Kay, Boynton and Olson, and colleagues. Experiment 2 validated our stimuli by comparing OSA, Munsell, and newly rendered “basic” exemplars using colorimetry and behavioral measures. Our results show that the relationship between the visual and verbal domains is more complex than current theory acknowledges. An interpoint distance model of color‐naming behavior is proposed as an alternative perspective on color‐naming universality and color‐category structure. © 2003 Wiley Periodicals, Inc. Col Res Appl, 28, 113–138, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.10131     

EZH2 Down-Regulation Exacerbates Lipid Accumulation and Inflammation in in Vitro and in Vivo NAFLD

Non-alcoholic fatty liver disease (NAFLD) is one of the most prevalent, chronic liver diseases, worldwide. It is a multifactorial disease caused by complex interactions between genetic, epigenetic and environmental factors. Recently, several microRNAs, some of which epigenetically regulated, have been found to be up- and/or down-regulated during NAFLD development. However, in NAFLD, the essential role of the Polycomb Group protein Enhancer of Zeste Homolog 2 (EZH2), which controls the epigenetic silencing of specific genes and/or microRNAs by trimethylating Lys27 on histone H3, still remains unknown. In this study, we demonstrate that the nuclear expression/activity of the EZH2 protein is down-regulated both in livers from NAFLD rats and in the free fatty acid-treated HepG2. The drop in EZH2 is inversely correlated with: (i) lipid accumulation; (ii) the expression of pro-inflammatory markers including TNF-α and TGF-β; and (iii) the expression of miR-200b and miR-155. Consistently, the pharmacological inhibition of EZH2 by 3-Deazaneplanocin A (DZNep) significantly reduces EZH2 expression/activity, while it increases lipid accumulation, inflammatory molecules and microRNAs. In conclusion, the results of this study suggest that the defective activity of EZH2 can enhance the NAFLD development by favouring steatosis and the de-repression of the inflammatory genes and that of specific microRNAs.     

HALS研发进展及其在PVC中的应用

介绍了近年来受阻胺类光稳定剂(HALS)新产品的研究开发情况,高分子量化受阻胺、多功能化受阻胺、低碱性化受阻胺和反应型受阻胺等不断出现;应用研究取得新进展,对PVC体系中有较好稳定的作用。     

咪鲜胺在粤浙两地水稻和土壤中残留动态

为了评价咪鲜胺在水稻上使用后的残留动态及环境安全性，在广东、浙江两地同时进行了咪鲜胺在水稻上的残留动态试验。结果表明：在广东地区，咪鲜胺在植株中的半衰期为2．59d，在土壤中的半衰期为2．46d，在稻田水的半衰期为0．46d；在浙江地区，咪鲜胺在植株中的半衰期为3．08d，在土壤中的半衰期为1．89d，在稻田水的半衰期为1．52d。收获的水稻糙米中咪鲜胺最终残留量均低于0．5mg／kg。