米其林C3M的特点

米其林Ｃ３Ｍ的特点ＤａｖｉｄＳｈａｗ著萧仪摘译Ｃ３Ｍ完全背离了现有的生产工艺。这种工艺的每一部分，从混炼到最后硫化，都与以往根本不同。不可能将Ｃ３Ｍ系统与普通生产系统混合，必须做出全部取或舍的决定。这种工艺是流水线系统，它按照各种部件精确的最终形状来...     

数理统计方法在轮胎硫化试验中的应用

使用计算机对胶料的硫化特性和力学性能试验数据及轮胎硫化测温数据进行回归分析，求得胶料为达到最佳硫化程度所需的硫化温度与时间，胶料的硫化程度与力学性能及轮胎硫化时的时间与温度之间的相关关系，以便进行轮胎硫化模拟计算和预测轮胎的硫化程度，为制订合理的轮胎硫化条件提供依据。     

C3轮胎通过噪声测试的有关问题探讨

对C3轮胎通过噪声的测试流程和有关问题进行了探讨。在执行测试标准的基础上,拆除车辆货箱和挡泥板,关闭窗户、空调;待测轮胎安装在试验车辆后轴时,采用噪声较低的轮胎作为前轴轮胎;车辆运行速度采用均匀分布设置;选择统一的配重标准,充气压力一致,并在夏季进行测试;保证路面的时效性,尽可能选择测试车辆较少的试验场或时段等都有利于噪声测试的通过。     

3C认证将使行业变局

自 2 0 0 3年 8月 1日起 ,中国政府将正式执行新的强制性产品认证 (简称 3C认证 )制度。根据该制度的规定 ,从这一天起 ,凡是没有通过强制性认证的产品将不得出厂、销售和进口。第一批要求强制认证的产品包括 1 9大类 1 32个品种 ,化工行业的机动车辆轮胎和乳胶制品中的避孕套也在其中。1　 3C认证实施的目的3C认证也称为CCC认证 ,是中国强制认证(ChinaCompulsoryCertification)的英文缩写。强制性产品认证是政府的强制性行为 ,要求某些产品必须符合国家标准和技术法规的规定 ,目的是保护人类健康和人身安全 ,保护动植物的生命安全 ,保…     

三项全新概念轮胎制造工艺技术初析

简要介绍了三家世界知名轮胎制造商的全新概念技术，包括大陆MMP技术，倍耐力MIRS技术，米其林C3M技术。具体介绍了这些技术的精髓和大体工序。     

贵州轮胎股份有限公司顺利通过2003年3C认证监督的现场审核

20 0 3年 9月 1 0日 ,贵州轮胎股份有限公司顺利通过中化联合质量认证公司 (HQC) 2 0 0 3年3C认证监督审查的现场审核。2 0 0 3年 9月 9～ 1 0日 ,HQC审核组分 2个小组按计划对该公司进行了认真审核。审核小组最终认为 :贵州轮胎股份有限公司具备持续满足强制性认证所需的生产能力和检验能力 ,产品实物质量持续实施了有效控制 ,产品一致性检查符合规定要求 ,公司能够持续满足质量保证能力要求 ,此次审查前 1 2个月内满足国家法律法规 (省部级以上监督抽查、环保合格 )的要求 ,可以继续使用3C认证证书和认证标志 ,但应在规定时间内对本次…     

VMI和马朗贡尼推出灵活轮胎成型系统

英国《欧洲橡胶杂志》2005年187卷2期23页报道：VMI和马朗贡尼工程技术人员合作研制了一种自动轮胎成型系统,它具有米其林C3M和倍耐力MIRS的所有优点,没有任何技术风险.     

3－C8-10烷氧基丙腈催化加氢制3－C8-10烷氧基丙胺

以3－C8-10烷氧基丙腈为原料,骨架镍为催化剂,制备了3－C8-10烷氧基丙胺。同时探讨了反应温度、反应时间、H2压力、NH3压力、骨架镍用量、H2O用量等因素对加氢反应的影响,确定了优化的工艺条件：在130℃、H2压力2．0MPa、NH3压力1．0MPa、骨架镍用量2．0％和H2O用量2．0％（相对于3－C8-10烷氧基丙腈的质量）下反应3h,在此条件下,产品收率为93．56％。     

40.5^〃A型硫化机中心机构C型化的改造

介绍了对４０．５＾〃Ａ型双模定型硫化机实施中心机械Ｃ经技术改造的成功经验,并指出改造后的硫化机特别适合于硫化台体层数少、胎侧厚度小、可以进行高温短时间热模硫化的轿车子午线轮胎,具有广泛的推广应用价值。     

The M3C Process: A New Multicolumn Chromatographic Process Integrating a Concentration Step. I—The Equilibrium Model

Abstract

A new Multicolumn Chromatographic process, called M3C, is introduced. The originality of this process relies on the integration of a concentration loop at the extract level on the recycling stream of a Multicolumn Continuous Process (Simulated Moving Bed, Varicol…). Thanks to the tools of the equilibrium theory applied to an equivalent True Moving Bed integrating a concentration step, the working parameters of this new process are estimated in the case of multicomponent competitive Langmuir adsorption isotherms. The performances of this process are compared to those of the classical True Moving Bed in terms of productivity and eluent consumption, and exhibit significant improvement.     

Physicochemical effects of nanosilica on C3A/C3S hydration

In this paper, C₃A-gypsum and C₃A-C₃S-gypsum model cement systems with and without nanosilica were studied. The effects of nanosilica on the early stage cement hydration, particularly C₃A hydration, were assessed through the heat of hydration (isothermal calorimetry), phase assemblage (quantitative X-ray diffraction), zeta potential, ion concentration measurements, and morphology (scanning electron microscopy) examinations. The results indicate that while promoting C₃S hydration, nanosilica retarded C₃A hydration in both the systems studied. The retardation was caused by the adsorption and coverage of nanosilica on C₃A surfaces through the electrostatic interaction, thus decreasing the C₃A dissolution rate and hindering the precipitation of hydration products. Consequently, the reduced gypsum consumption rate and the seeding effect of nanosilica further promoted C₃S hydration. These findings suggest that nanosilica and other silica-based nanoparticles can physicochemically influence hydration of cement-based materials, and a better understanding of these influencing mechanisms can help optimize performances of nanoparticle-modified cement-based materials.     

Cassiaside C Inhibits M1 Polarization of Macrophages by Downregulating Glycolysis

Classically activated M1 macrophages reprogram their metabolism towards enhanced glycolysis to obtain energy and produce pro-inflammatory cytokines after activation by mammalian target of rapamycin complex 1 (mTORC1) and hypoxia-inducible factor (HIF)-1α. Thus, a strategy that constrains M1 polarization of macrophages via downregulation of glycolysis is essential for treating chronic inflammatory diseases. Cassiae semen has pharmacological activity against various inflammatory diseases. However, it is unclear whether specific compounds within Cassia seeds affect M1 polarization of macrophages. Here, we investigated whether Cassiaside C napthopyrone from Cassiae semen inhibits M1 polarization by downregulating glycolysis. We found that Cassiaside C reduced expression of inducible nitric oxide synthase and cyclooxygenase-2 and the phosphorylation of nuclear factor kappa B, all of which are upregulated in lipopolysaccharide (LPS)/interferon (IFN)-γ-treated Raw264.7 cells and peritoneal macrophages. Moreover, Cassiaside C-treated macrophages showed marked suppression of LPS/IFN-γ-induced HIF-1α, pyruvate dehydrogenase kinase 1, and lactate dehydrogenase A expression, along with downregulation of the phosphoinositide 3-kinases (PI3K)/AKT/mTORC1 signaling pathway. Consequently, Cassiaside C attenuated enhanced glycolysis and lactate production, but rescued diminished oxidative phosphorylation, in M1 polarized macrophages. Thus, Cassiaside C dampens M1 polarization of macrophages by downregulating glycolysis, which could be exploited as a therapeutic strategy for chronic inflammatory conditions.     

铝酸三钙等因素对水泥使用性能的影晌

近年来，水泥用户对影响水泥使用性能的矿物组成，特别是C3A，水泥温度、标准稠度以及水泥颜色等方面的要求越来越高。为满足这种需求，中联鲁宏水泥有限责任公司进行了专题研究，采取了一系列相应的技术措施，从而确保了生产的水泥既满足国标要求，又能满足混凝土生产和应用企业的使用性能要求。     

中药药剂学的教学实践的几点思考

为了提高教学水平和教学质量,培养适合时代需要的药学专业人才,文章从"中药药剂学"教学内容的设计、实验改革、教学方法和考核方法等方面,对中药药剂学教学改革做了全面的总结。     

C3d分子多表位DNA疫苗体液免疫应答的增强作用

目的研究C3d分子对多表位DNA疫苗体液免疫应答的增强作用。方法通过PCR方法合成多表位HME基因,分别插入真核表达载体pcDNA3.1和pcDNA3.1-3C3d,构建多表位DNA疫苗pcDNA3.1-HME和pcDNA3.1-HME-3C3d,经肌肉注射免疫小鼠,ELISA检测小鼠特异性抗体水平。结果经免疫的小鼠均能产生针对各表位的特异性IgG抗体,且pcDNA3.1-HME-3C3d免疫组小鼠的抗体水平明显高于pcDNA3.1-HME免疫组。结论C3d可增强多表位DNA疫苗的体液免疫应答水平。     

超硬材料C_3N_4的X射线衍射图谱模拟

运用材料模拟软件Materials Studio计算模拟了α-C3N4及β- C3N4的晶体结构及X射线衍射图谱,并将实验所得的XRD数据与模拟结果进行了对比分析.通过数值模拟,可以为实验结果提供标准的参考数据,并检验实验结果.     

碳三加氢催化剂的常见毒物

介绍了乙烯装置碳三馏分液相加氢反应及工艺,毒物是碳三液相加氢催化剂失活的重要原因之一。重点介绍了砷、硫、水、重金属对碳三催化剂运行的影响及毒物的脱除方法,控制好碳三反应器进料中的毒物,可以减缓催化剂活性下降,延长使用寿命。     

Mechanochemically synthesized ZIF-8 nanoparticles blended into 6FDA-TrMPD membranes for C3H6/C3H8 separation

The mixed matrix membranes (MMMs) consisting zeolitic-imidazolate framework-8 (ZIF-8) nanoparticles in a polymer have been of considerable interest in separation applications. The fillers used are mostly synthesized using the solvothermal method. In this study, the ZIF-8 nanoparticles were synthesized using a solvent-less and salt-free mechanochemical method and were added to 6FDA-TrMPD polyimide to prepare MMMs. The single gas permeation of C₃H₆ and C₃H₈ through the MMMs was investigated. The C₃H₆ permeability and C₃H₆/C₃H₈ ideal selectivity of a 20 wt% mechano-synthesized ZIF-8/6FDA-TrMPD MMM were 70% and 32% higher than those of the neat polymer membrane at 0.1 MPa and 308 K, respectively. The C₃H₆/C₃H₈ separation performance of the mechano-synthesized ZIF-8 MMM was similar to that of the conventional solvothermal-synthesized ZIF-8 MMM. This separation performance was in good agreement with the Maxwell model. Temperature and pressure dependence analyses confirmed that the mechano-synthesized ZIF-8 nanoparticles acted as molecular sieves in the MMMs for the C₃H₆ and C₃H₈ permeation.