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从廉价的代价引发的思考 被引量:1
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作者 詹森·W.摩尔 +2 位作者 吴文忠 何芳 赵世忠 《国际融资》 2018年第4期68-71,共4页
闪电和雷霆需要时间,行星的光芒需要时间,已完成的事也需要时间来让人看见和听见。这事距离他们比最遥远的星星还要遥远——虽然那是他们自己干出来的!——弗里德里希·尼采《快乐的科学·疯子》
关键词 廉价 时间 快乐 尼采 里德
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New High Viscosity Ester Base Stocks for Superior Lubricant Formulations
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作者 Markus Scherer raj patel Ling Yun 《润滑油》 CAS 2013年第1期13-18,共6页
BASF presents a new high viscosity ester base stock technology.Viscosity profiles of these new candidates are comparable to market-known high viscosity PAO types such as PAO 40 and PAO 100.Due to the more polar nature... BASF presents a new high viscosity ester base stock technology.Viscosity profiles of these new candidates are comparable to market-known high viscosity PAO types such as PAO 40 and PAO 100.Due to the more polar nature of the new ester base stocks additional benefits can be achieved in terms of friction reduction,energy efficiency or facilitated additive solubilisation against high viscosity PAOs.The superior performance of the new high viscosity ester base stock technology is demonstrated in direct comparison against high viscosity PAO counterparts in industrial gear applications.The basic advantages found herein in industrial gear applications are also of relevance for other lubricant applications such as automotive driveline oil or engine oil applications.As one exemplary area industrial gear applications play a dominant role in modern wind turbines.The latest generation of lubricants used in these turbine gear boxes are required to provide a greater performance in terms of wear protection,durability,foam resistance,shear stability,and oxidation resistance.Common formulations are based on a PAO base stock thickened with high molecular weight PAO polymers to achieve a viscosity of ISO 320 combined with additives to provide wear protection,foam resistance etc.A recent plant outage coupled with high demand for high molecular weight PAO polymers has led to the market becoming aware of potential availability issues.In response to this important challenge BASF has developed a new formulation strategy-based on the new high viscosity ester technology and upon a widely available low molecular weight PAO base stock employing a new concept in a thickening system that avoids the use of high molecular weight PAO polymers.The novel ester base stock can be manufactured at multiple locations and is based on sustainable raw materials that can be sourced from a wide supplier base. 展开更多
关键词 石油炼制 基础理论 炼油工艺 石油产品
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生殖器疱疹
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作者 raj patel 赵娜(译) 渠涛(校) 《国际内科双语杂志(中英文)》 2006年第5期8-11,42-45,共8页
生殖器单纯疱疹病毒(HSV)是生殖器溃疡的最常见原因,可以引起局部的、系统的和性心理的并发症。它是新生儿罹病的重要原因,也是HIV传播的辅助因子,这在发展中国家尤为突出。
关键词 生殖器疱疹 单纯疱疹病毒 生殖器溃疡 HIV传播 发展中国家 辅助因子 并发症 新生儿
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生态农业:不止消除饥饿
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作者 拉杰·帕特尔 刘彬(翻译) 《环球科学》 2021年第23期58-67,共10页
世界各地的农民正在改善食物的种植和分享方式,从而使粮食变得更有营养,更具生物多样性,并能带来更高的生活质量。尽管这里位于消除饥饿运动的最前方,但如果您认为自己正在观看真人秀烹饪节目,倒也情有可原。在马拉维(Malawi)布瓦布瓦山... 世界各地的农民正在改善食物的种植和分享方式,从而使粮食变得更有营养,更具生物多样性,并能带来更高的生活质量。尽管这里位于消除饥饿运动的最前方,但如果您认为自己正在观看真人秀烹饪节目,倒也情有可原。在马拉维(Malawi)布瓦布瓦山脉(Bwabwa Mountain)低矮的山峰脚下,鲁库鲁河(Rukuru River)支流旁的一个村庄里,近百人正围在大锅、炉灶旁。 展开更多
关键词 生态农业 真人秀 马拉维 生物多样性 饥饿
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