8月份30城市乘用车轮胎热销型号市场价格

注：按品牌中文首字母排序;30城市为：北京、上海、广州、深圳、杭州、成都、沈阳、西安、武汉、青岛、哈尔滨、合肥、呼和浩特、兰州、连云港、洛阳、南昌、南宁、攀枝花、秦皇岛、曲靖、厦门、太原、泰安、重庆、乌海、乌鲁木齐、泰州、大庆、运城     

湖南矿必兴科技有限公司

<正>矿兴磨矿业兴旺矿兴磨必不可少新型节能、环保高科技粉磨机矿兴磨应用范围矿兴磨广泛应用于建材、冶金、化工、矿山、能源、电力、耐火材料等行业中莫氏硬度8级以下,成品细度不高于-400目的各种物料的粉磨。如水泥(生、熟料)、石灰石、石灰、双飞粉、石膏、玻璃、砂岩、页岩、煤、焦碳、煤矸石、蛇纹石、矿渣、高炉渣、滑石、方解石、白云石、大理石、莹石、麦饭石、铁合金(硅铁、锰铁、铬铁等)、高岭土、凹凸棒土、钡盐、氧化铁红、明矾、钾盐、重晶石、铁矿、、铜矿、锰矿、镁矿、金属锰、硫磺、长石、石英、电石、烧结矿、铝钒土、磷矿石、钙镁磷肥、磷铵、尿素、偏硅酸钠、磷石膏、硫石膏、球团散矿等。     

第七届中国广州国际泵阀门管道与流体技术展览会

展出时间2013年8月21～23日展出地点中国进出口商品交易会展览馆展出内容水泵、化工泵、气动隔膜泵、计量泵、螺杆泵、离心泵、流程泵、油泵、污泵、排污泵、泥浆泵、渣浆泵、井泵、真空泵、磁力泵、压力泵、叶片式泵、容积式泵等;球阀、蝶阀、闸阀、柱塞阀、电磁阀、真空阀、电站阀、温控阀、疏水阀、排污阀、止回阀、截止阀、排气阀、密封阀等;节流阀、旋塞阀、隔膜阀、调压阀、     

资讯

中国陶瓷设计艺术大师名单（按姓氏笔画排序） 方文贤、王一君、王怀治、王采、王爱红、王绪远、冯林华、冯绍华、叶建新、关涛、刘少平、刘少倩、刘志钧、刘畅、刘鹏润、孙建兴、朱辉球、许国胜、邬书远、何炳钦、吴少雄、张肃、张金伟、李戈程、李廷怀、李竹玲、李伯书、李林、李新一、杨希文、杨英才、杨晓锋、汪洋、陈华、陈新华、周志远、周晓冰、岳振、易武、     

第十四届国际干燥学术会议（IDS 2004）简介

会议规模：共有48个国家和地区参加，有波兰、美国、巴西、法国、澳大利亚、加拿大、古巴、捷克、丹麦、芬兰、德国、希腊、匈牙利、印度、以色列、意大利、日本、挪威、罗马尼亚、俄罗斯、西班牙、瑞典、泰国、北爱尔兰、西印度群岛、南斯拉夫、乌克兰、白俄罗斯、智利、突尼斯、摩洛哥、苏丹等。     

市场动态

1994年化工排产会上60种化工产品市场情况畅销:15种,占25％。有尿素、合成复合肥、钾肥、氰化钠、辛醇、苯胺、甲苯、二甲苯、精甲醇、聚氯乙烯、苯酐、四氯化碳、邻甲苯胺、黄磷。平销:32种,占53.3％。有硫铁矿、磷矿、纯碱、烧碱、农药、油漆、染料、轮胎、硼砂、硼酸、氰化钾、电石、氧化锌、钛白粉、氯磺酸、纯苯、冰醋酸、苯酚、丙酮、粗苯、硝基苯、丁醇、硫酸二甲酯、环己酮、己内酰胺、炭黑、防老剂(RD、4010、4010NA、H)、促进剂(D、TETD、NA—22)、邻苯二甲酸二丁酯、邻苯二甲酸二辛酯、农药乳化剂、工程塑料。滞销:13     

4月份27城市乘用车轮胎热销型号市场价格

按品牌中文首字母排序;27城市为：北京、上海、广州、深圳、杭州、成都、沈阳、西安、武汉、青岛、哈尔滨、合肥、呼和浩特、兰州、连云港、洛阳、南昌、南宁、攀枝花、秦皇岛、曲靖、厦门、太原、泰安、重庆、乌海、乌鲁木齐     

上海林帕实业有限公司

<正>本公司专业分销国际国内多家公司香料产品,原产地:西班牙、印度、印尼、摩洛哥、马达加斯加、伊朗、埃及、巴西、德国、英国、墨西哥、阿根廷、法国、美国、俄罗斯、日本等天然类:甜橙油、柠檬油、丁香油、桂皮油、白柠檬油、桂叶油、薰衣草油、茉莉花净油、玫瑰净油、桦焦油、香荚兰豆、黑香豆、山苍子油、姜油(冷,热)、香根油、藿香油、薄荷素油、椒样薄荷油、茴油、桉叶油、留兰香油、香茅油、松油系列、柏木油系列、芹菜籽油、芫荽籽油、依兰油、卡南加油、红桔油、浸膏系列等     

殷国光陶瓷艺术迎春展在南昌举行

2011年12月29日上午,"学书画"殷国光陶瓷艺术作品迎春展在省政协隆重开幕。省领导傅克诚、刘上洋、朱张才、陈清华、李华栋、汤建人、郑小燕、胡幼桃、肖光明出席。出席开幕式的老同志有:朱治宏、彭宏松、卢秀珍、马世昌、蒋如铭、孙用和、全文甫、万学文、张逢雨、华桐、钱梓弘、胡东太、王林森、刘运来、金异、黄懋衡、梅亦龙、罗明、厉志成、叶学龄、黄立     

近期国内化工产品价格行情

产品名称1、盐酸3、硝酸5、氢氟酸7、草酸9、磷酸11、硬脂酸13、苯甲酸巧、氯乙酸17、氨基磺酸19、烧碱21、小苏打23、氢氧化钾25、氢氧化镁27、液氯29、氧化铝31、氧化镁33、钦白粉35、硝酸钠37、原盐39、过磷酸钙41、焦炭43、氯化钱45、氯化钾47、氯酸钠49、硼砂51、双氧水53     

Enzymes-Assisted Extraction of Plants for Sustainable and Functional Applications

The scientific community and industrial companies have discovered significant enzyme applications to plant material. This rise imparts to changing consumers’ demands while searching for ‘clean label’ food products, boosting the immune system, uprising resistance to bacterial and fungal diseases, and climate change challenges. First, enzymes were used for enhancing production yield with mild and not hazardous applications. However, enzyme specificity, activity, plant origin and characteristics, ratio, and extraction conditions differ depending on the goal. As a result, researchers have gained interest in enzymes’ ability to cleave specific bonds of macroelements and release bioactive compounds by enhancing value and creating novel derivatives in plant extracts. The extract is enriched with reducing sugars, phenolic content, and peptides by disrupting lignocellulose and releasing compounds from the cell wall and cytosolic. Nonetheless, depolymerizing carbohydrates and using specific enzymes form and release various saccharides lengths. The latest studies show that oligosaccharides released and formed by enzymes have a high potential to be slowly digestible starches (SDS) and possibly be labeled as prebiotics. Additionally, they excel in new technological, organoleptic, and physicochemical properties. Released novel derivatives and phenolic compounds have a significant role in human and animal health and gut-microbiota interactions, affecting many metabolic pathways. The latest studies have contributed to enzyme-modified extracts and products used for functional, fermented products development and sustainable processes: in particular, nanocellulose, nanocrystals, nanoparticles green synthesis with drug delivery, wound healing, and antimicrobial properties. Even so, enzymes’ incorporation into processes has limitations and is regulated by national and international levels.     

Mechanisms Governing Anaphylaxis: Inflammatory Cells,Mediators, Endothelial Gap Junctions and Beyond

Anaphylaxis is a severe, acute, life-threatening multisystem allergic reaction resulting from the release of a plethora of mediators from mast cells culminating in serious respiratory, cardiovascular and mucocutaneous manifestations that can be fatal. Medications, foods, latex, exercise, hormones (progesterone), and clonal mast cell disorders may be responsible. More recently, novel syndromes such as delayed reactions to red meat and hereditary alpha tryptasemia have been described. Anaphylaxis manifests as sudden onset urticaria, pruritus, flushing, erythema, angioedema (lips, tongue, airways, periphery), myocardial dysfunction (hypovolemia, distributive or mixed shock and arrhythmias), rhinitis, wheezing and stridor. Vomiting, diarrhea, scrotal edema, uterine cramps, vaginal bleeding, urinary incontinence, dizziness, seizures, confusion, and syncope may occur. The traditional (or classical) pathway is mediated via T cells, Th2 cytokines (such as IL-4 and 5), B cell production of IgE and subsequent crosslinking of the high affinity IgE receptor (FcεRI) on mast cells and basophils by IgE-antigen complexes, culminating in mast cell and basophil degranulation. Degranulation results in the release of preformed mediators (histamine, heparin, tryptase, chymase, carboxypeptidase, cathepsin G and tumor necrosis factor alpha (TNF-α), and of de novo synthesized ones such as lipid mediators (cysteinyl leukotrienes), platelet activating factor (PAF), cytokines and growth factors such as vascular endothelial growth factor (VEGF). Of these, histamine, tryptase, cathepsin G, TNF-α, LTC₄, PAF and VEGF can increase vascular permeability. Recent data suggest that mast cell-derived histamine and PAF can activate nitric oxide production from endothelium and set into motion a signaling cascade that leads to dilatation of blood vessels and dysfunction of the endothelial barrier. The latter, characterized by the opening of adherens junctions, leads to increased capillary permeability and fluid extravasation. These changes contribute to airway edema, hypovolemia, and distributive shock, with potentially fatal consequences. In this review, besides mechanisms (endotypes) underlying IgE-mediated anaphylaxis, we also provide a brief overview of IgG-, complement-, contact system-, cytokine- and mast cell-mediated reactions that can result in phenotypes resembling IgE-mediated anaphylaxis. Such classifications can lead the way to precision medicine approaches to the management of this complex disease.     

中低温煤焦油蒸馏过程中金属元素的迁移规律

以中低温煤焦油轻油和重油为实验原料,采用常压蒸馏获得170~200℃、200~240℃、240~270℃、270~300℃、300~320℃、320~340℃、340~360℃和360~390℃煤焦油馏分油;利用配有油品加氧制冷进样系统的ICP-OES测定了21种微量元素在馏分油中的含量,考察了不同馏分油中元素的分布情况。研究表明：在原煤焦油中,未发现Ag、Mg、Mo、Na、Ni、Fe、Mn、Cr及Ti元素,含量较高的元素有Sn、P、Al、Pb、Si,其中Sn元素在轻油和重油中的含量分别为11.78μg/g和14.04μg/g;在所有馏分油中,未发现Al、Mo、Fe、Mn、Cr及Ti元素,含量比较高的元素有Si、Sn、Na、Zn、Pb,特别是Si、Na、Sn、Zn、Ni、Pb及B元素可以有效富集于馏分油中。可能的原因是Ca、Fe、Mg、Al等金属以不同的盐类形态存在,在煤焦油脱水及<170℃蒸馏过程中,这些金属盐类会被部分带出,导致其在馏分油中的含量未富集或未检出;通过关联金属元素在馏分油中的分布与其组成的关系,馏分油中元素的分布可能与酚类化合物、杂环化合物和蒸馏温度等相关。酚类化合物及杂环化合物可能与Ag、B、Cu、Mo、Sn、Na、Zn、Ca、Pb等金属形成络合物或卟啉配合物,蒸馏温度一方面可以破坏Sn、Cd、Pb、Zn、Cu、Ca、Pb等元素在馏分油中的结合力,另一方面也可以促进这些元素与馏分油中的含氧、含氮等化合物更好地发生化合反应,进而影响金属元素在馏分油中的含量分布。     

松香基表面活性剂研究进展

松香是一类产量丰富、价格低廉的可再生林产资源,被广泛地应用于食品、农业、橡胶、油墨、涂料等领域。松香的三环二萜结构具有超强的疏水性,通过催化异构、Diels-Alder加成等手段引入亲水基团可制备高附加值、易生物降解的绿色表面活性剂。本文从阴离子、阳离子、非离子和两性离子表面活性剂4个大类对松香基表面活性剂应用的文献及专利进行综述,重点分析了羧酸盐、磺酸盐、硫酸盐和磷酸盐4种阴离子型表面活性剂和季铵盐阳离子型表面活性剂,多元醇型和聚氧乙烯型非离子表面活性剂,以及甜菜碱型和氧化胺型两性离子表面活性剂。剖析松香基表面活性剂产业化开发的新技术及新产品概况,提出松香基表面活性剂替代传统表面活性剂的潜在应用领域。同时,对松香基表面活性剂的研究发展与产业化发展进行了评价与展望。     

Recent advances in synthesis, physical properties and applications of conducting polymer nanotubes and nanofibers

This article summarizes and reviews the various preparation methods, physical properties, and potential applications of one-dimensional nanostructures of conjugated polyaniline (PANI), polypyrrole (PPY) and poly(3,4-ethylenedioxythiophene) (PEDOT). The synthesis approaches include hard physical template method, soft chemical template method, electrospinning, and lithography techniques. Particularly, the electronic transport (e.g., electrical conductivity, current-voltage (I-V) characteristics, magnetoresistance, and nanocontact resistance) and mechanical properties of individual nanowires/tubes, and specific heat capacity, magnetic susceptibility, and optical properties of the polymer nanostructures are presented with emphasis on size-dependent behaviors. Several potential applications and corresponding challenges of these nanofibers and nanotubes in chemical, optical and bio-sensors, nano-diodes, field effect transistors, field emission and electrochromic displays, super-capacitors and energy storage, actuators, drug delivery, neural interfaces, and protein purification are also discussed.     

High-Performance Polymers for Separation and Purification Processes: An Overview

Separation and purification techniques are applied in many important fields, such as in the medical, chemical, metallurgical, environmental, and pharmaceutical industries. Recent advances in separation science and the urgent need for highly selective purification have necessitated a rapid progress with respect to the reagents, chemicals, and surfactants used in separation processes to attain a high efficiency and selectivity. Polymeric materials have attracted considerable interest, and they have been widely used as extractants, catalysts, and modifiers, in separation and purification processes. This review outlines the recent advances in the use of novel polymers, natural and synthetic, in different separation and purification techniques. Various separation techniques such as chromatography, crystallization, precipitation, distillation, electrophoresis, filtration, and mineral processing methods are discussed, and the polymers used in each method are described in terms of their properties, structure, and function. The application of polymers shows great promise in achieving a highly efficient separation, especially in the areas of membrane separation and water purification. The rational design of new multifunctional polymers with triggered functions presumably presents new opportunities for the development of advanced separation methods.     

Petrography and geochemistry of the Middle Devonian coal from Luquan, Yunnan Province, China

Coals from Luquan, Yunnan Province, China, have high contents of cutinite and microsporinite, with an average of 55 and 33.5 vol%, respectively, (on a mineral-free basis). The coals are classified as cutinitic liptobiolith, sporinite-rich durain, cutinite-rich durain, and sporinitic liptobiolith. These four liptinite-rich coals are often interlayered within the coal bed section and vary transversely within the coal bed. The vitrinite content varies from as low as 1.6-20.5% (mineral-free basis), and it is dominated by collodetrinite, collotelinite, and corpogelinite. The maceral composition may be attributed to the type of the peat-forming plant communities. Moreover, the Luquan coals are characterized by high contents of volatile matter, hydrogen, and oxygen, and the high values of the atomic hydrogen to carbon ratio as a result of the maceral composition. As compared with the common Chinese coals and the upper continental crust, the Luquan coals are enriched in Li, B, Cu, Ga, Se, Rb, Mo, Ba, Pb, Bi, and U, with averages of 99.9, 250, 111, 24.4, 4.55, 130, 58.8, 1276, 162, 3.85, and 34.1 μg/g, respectively. The SEM-EDX results show that V, Cr, Ga, and Rb occur mainly in clay minerals, and Cu and Pb are associated with clay minerals and pyrite, and Mo and U are mainly in clay minerals and organic matter. Barite and clay minerals are the main carrier of barium. The high B and U contents are probably resulted from deep seawater influence during coal formation.     

Effects of Extraction Temperature and Preservation Method on Functionality of Soy Protein

The effects of extraction temperature and preservation method on the functional properties of soy protein isolate (SPI) were determined. Four extraction temperatures (25, 40, 60, and 80 °C) were used to produce SPI and yields of solids and protein contents were determined. Three preservation methods were also tested (spray-drying, freeze-drying, and freezing–thawing) and compared to fresh (undried) samples for each extraction temperature. No differences in yields of solids and protein were observed among SPIs extracted at 25, 40, and 60 °C; however, SPI extracted at 80 °C yielded significantly less solids and protein. Extraction temperature significantly affected SPI functionality. As extraction temperature increased, solubility and emulsification capacity decreased; surface hydrophobicities, emulsification activities and stabilities, and dynamic viscosities increased; and foaming properties improved. Preservation method also significantly affected SPI functionality. Drying method did not affect the denaturation enthalpies of SPIs, but spray-dried SPIs had higher solubilities, surface hydrophobicities, and emulsification stabilities, and lower viscosities, emulsification activities and rates of foaming than freeze-dried SPI exhibited. Emulsification and foaming capacities and foaming stabilities were similar for both methods of drying. There was significant interaction between extraction temperature and preservation method for all functional properties except emulsification capacity.     

加快推进绿色生物制造 助力实现“碳中和”

首先分别从全球新一轮科技革命和产业变革战略、我国化工制造模式变革、实现“碳中和”、实现农业工业化的角度,阐述了绿色生物制造的涵义与意义;其次,对我国生物制造产业发展现状、战略需求进行了分析,文章指出我国生物制造产业虽然起步较晚,但近年来发展迅速,在生物发酵、生物基产品和生物质能等领域形成了一定基础,但是核心层仍然存在短板,表现为关键核心技术和前瞻技术储备不足、核心装备研发落后、市场化程度低、竞争力不足;最后,文章对未来生物制造发展的重点方向与路径提出了相关建议,具体包括推进原料体系多元化战略、建立先进生物制造技术体系。文章指出加快从基因组到工业合成技术、装备突破,支撑生物基化学品、生物基材料、生物能源等重大产品的绿色生产,以生物制造推动“农业工业化、工业绿色化、产业国际化”,对于我国走新型工业化道路,实现财富绿色增长和社会经济可持续发展具有重大战略意义。