共查询到20条相似文献,搜索用时 125 毫秒
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详细介绍了镀锡青铜回火胎圈钢丝生产线,包括镀前钢丝工艺和化镀锡青铜生产线的工艺流程、加工技术参数、设备组成及主要工序。采用此生产线生产的镀锡青铜回火胎圈钢丝性能优良,不仅具备在硫化过程中与轮胎橡胶整体达到良好的粘合的优势,并且具有在轮胎使用中、后期钢丝与橡胶粘合力稳定的特点。 相似文献
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《建筑玻璃与工业玻璃》2005,(2):39-40
平置法生产蒙砂玻璃的机械化生产线;胶态二氧化硅组合物及其方法生产;局部结晶的玻璃;用于运送玻璃的被覆盖的辊子;用于使玻璃板弯曲和回火的设备。 相似文献
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对汽油汽化气燃烧“回火”问题进行了“回火”原因分析、过程分析和数据分析,采取了更换雾化喷头和增设汽化系统末端出口压力上下限报警装置,从根本上克服了“回火”。 相似文献
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介绍了SPV490Q在线回火热处理工艺,通过与传统热处理工艺的比较,分析了其产品的组织、性能,提出了在工程中初次使用该工艺生产的SPV490Q时应注意的一些问题。 相似文献
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为了研究回火温度对生物基熔纺氨纶纤维力学性能的影响。设定了50,100,120℃3个温度对纤维进行回火处理。采用傅里叶变换红外光谱法、凝胶渗透色谱法、差示扫描量热法分别研究了回火温度对生物基熔纺氨纶纤维的官能团、分子量分布、结晶面积等的影响,单丝强力测试了回火温度对生物基熔纺氨纶纤维断裂强度、断裂伸长率、300%定伸长应力、300%弹性回复率的影响。研究结果表明,回火温度导致的官能团变化对生物基熔纺氨纶的力学性能影响较小。回火温度为100℃时,该纤维的大分子生成和小分子析出相对降低,大分子含量为8.4%,硬段区的结晶峰为一个,结晶面积为1.75 J/g。随着回火温度增加,大分子增加,结晶面积减少,试样的断裂强度增加、断裂伸长率也增加,300%定伸长应力和300%弹性回复率呈下降趋势。综合考虑回火温度、大分子含量、硬段结晶等因素,回火温度为100℃时,生物基熔纺氨纶的力学性能最佳。 相似文献
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Sabrina Bilotta Julian Arbogast Nadine Schart Maurice Frei Axel Lorentz 《International journal of molecular sciences》2022,23(3)
Mast cells are involved in allergic and other inflammatory diseases. The polyphenol resveratrol is known for its anti-inflammatory properties and may be used as nutraceutical in mast cell associated diseases. We analyzed the effect of resveratrol on mast cells in vivo in ovalbumin-induced allergic enteritis as well as experimental colitis in IL-10−/− mice which received resveratrol via drinking water. Treatment with resveratrol prevented the increase in mast cells in both allergic enteritis and chronic colitis in duodenum as well as in colon. Further, it delayed the onset of diseases symptoms and ameliorated diseases associated parameters such as tissue damage as well as inflammatory cell infiltration in affected colon sections. In addition to the findings in vivo, resveratrol inhibited IgE-dependent degranulation and expression of pro-inflammatory cytokines such as TNF-α in IgE/DNP-activated as well as in LPS-activated bone marrow-derived mast cells. These results indicate that resveratrol may be considered as an anti-allergic and anti-inflammatory plant-derived component for the prevention or treatment of mast cell-associated disorders of the gastrointestinal tract. 相似文献
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室温离子液体(ionic liquids, ILs)作为一种新型的绿色环保溶剂,由于其特殊的功能化结构及热稳定性好、挥发度低和溶解能力强等特点,目前被广泛应用于纳米材料的制备领域。本文重点介绍了离子液体在纳米材料制备中的应用及相关研究的最新进展,结合一些示例对本领域进行了概述,其中包括离子液体作为溶剂,例如作为反应介质和稳定剂;模板剂,例如利用离子液体的微结构(胶束和囊泡、液晶凝胶、乳液和微乳液)作为纳米材料合成中的模板和软模板;反应物,例如作为反应中的还原剂和反应组分;以及离子液体微乳液在纳米材料制备中的特殊用法进行了总结,并讨论了离子液体在快速发展的纳米材料制备领域中的存在挑战和机遇。 相似文献
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天然防紫外线产品研究概况 总被引:6,自引:1,他引:5
综述了国内外已研究的天然防紫外线成分的种类(国内:芩芦凝胶、复配天然紫外吸收剂、沙棘油、扇贝多肽、人参和绿茶等;国外:芦荟、水飞蓟和陈皮等);介绍了研究采用的方法和结果;并从头发防晒、儿童防晒、防晒剂复合运用和口服防晒剂等角度展望了天然防紫外线产品的应用潜力和发展趋势;同时也指出了现阶段研究的缺陷。 相似文献
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磷酸生产技术开发的进展 总被引:12,自引:1,他引:11
针对热法磷酸生产耗电量高,湿法磷酸生产对磷矿质量要求严,以及我国中低品位磷矿资源特点,介绍了我国自行开发的窑法磷酸特点、工艺流程和试验结果,以及热法磷酸生产中热能回收技术的进展,认为这两项新工艺、新技术效果显著,应尽快促使实现工业化。 相似文献
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Green seeds are used as a grading factor in estimating chlorophyll in canola and rapeseed in the Canadian and U.S.A. grading
systems. This work examines the effect that sampling and perception have on the estimation of green seeds as well as the effect
that sampling has on the determination of chlorophyll. Individual seed analysis indicated that in order to be considered as
green, seeds needed to contain between 200 and 400 mg/kg chlorophyll. Variation due to binomial sampling played a predominant
role in the error in determining the green seed levels in canola. Sampling of large numbers of seeds, as in the loading of
export shipments, reduced the error. Binomial sampling also contributed to the error in chlorophyll determination even with
sample sizes as large as 500. Differences in perception of green also were noted between individuals with coefficients of
variation as high as 50% at the 1% green seed level. The combination of perception error and sampling error may result in
samples of 1,000 seeds drawn from a mass with 2% green seeds having green seed counts ranging from 0.96 to 3.04%, 19 times
out of 20. 相似文献
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Makiko Mochizuki-Kashio Hiroko Shiozaki Toshio Suda Ayako Nakamura-Ishizu 《International journal of molecular sciences》2021,22(9)
Hematopoietic stem cells (HSCs) reside in a hypoxic microenvironment that enables glycolysis-fueled metabolism and reduces oxidative stress. Nonetheless, metabolic regulation in organelles such as the mitochondria and lysosomes as well as autophagic processes have been implicated as essential for the determination of HSC cell fate. This review encompasses the current understanding of anaerobic metabolism in HSCs as well as the emerging roles of mitochondrial metabolism and lysosomal regulation for hematopoietic homeostasis. 相似文献
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薛涛 《纤维素科学与技术》2012,20(2):46-50
以废弃棉短绒为模板,采用溶胶凝胶技术制备出新型多孔碳模板,研究了纤维素碳化的机理。多孔碳的收缩率随着树脂/棉短绒复合体中树脂含量的增大而减小;所得多孔碳的气孔率随着树脂/棉短绒复合体中树脂含量的增大而减小,也随着碳化温度的升高而减小;多孔碳的弯曲强度随着树脂/棉短绒复合体中酚醛树脂含量的增大而增大,也随着碳化温度的升高而增大。 相似文献
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Ezrin is one of the members of the ezrin/radixin/moesin (ERM) family of proteins. It was originally discovered as an actin-binding protein in the microvilli structure about forty years ago. Since then, it has been revealed as a key protein with functions in a variety of fields including cell migration, survival, and signal transduction, as well as functioning as a structural component. Ezrin acts as a cross-linker of membrane proteins or phospholipids in the plasma membrane and the actin cytoskeleton. It also functions as a platform for signaling molecules at the cell surface. Moreover, ezrin is regarded as an important target protein in cancer diagnosis and therapy because it is a key protein involved in cancer progression and metastasis, and its high expression is linked to poor survival in many cancers. Small molecule inhibitors of ezrin have been developed and investigated as candidate molecules that suppress cancer metastasis. Here, we wish to comprehensively review the roles of ezrin from the pathophysiological points of view. 相似文献
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Fred vandeVelde NídiaD. Loureno HelenaM. Pinheiro Martin Bakker 《Advanced Synthesis \u0026amp; Catalysis》2002,344(8):815-835
Immobilisation of both enzymes and whole‐cell systems is of major importance in the improvement of the stability, activity and reusability of these biocatalysts. This review describes the use of the naturally occurring polysaccharide carrageenan as a support for the immobilisation of biocatalysts. Carrageenan is a food‐grade and biocompatible support material extracted from red seaweeds. Before focusing on the use of carrageenan as an immobilisation support, an overview is given of the present uses of biocatalysts in industrial processes. The basic concepts of enzyme and whole‐cell immobilisation are discussed, as well as the background of carrageenan as a biopolymer. Several examples of enzymes and whole‐cell systems immobilised in carrageenan are discussed. A list of the most relevant patents in this field is presented as well as a list of enzymes and cell systems immobilised in carrageenan as described in the literature. 相似文献