New insights into the extraction of invisible gold in a low-grade high-sulfur Carlin-type gold concentrate by bio-pretreatment

To extract gold from a low-grade (13.43 g/t) and high-sulfur (39.94wt% sulfide sulfur) Carlin-type gold concentrate from the Nibao deposit, Guizhou, a bio-pretreatment followed by carbon-in-pulp (CIP) cyanide leaching process was used. Various methods were used to detect the low-grade gold in the concentrate; however, only time-of-flight secondary-ion mass spectrometry (TOF-SIMS) was successful. With bio-pretreatment, the gold recovery rate increased by approximately 70.16% compared with that obtained by direct cyanide leaching of the concentrate. Various attempts were made to increase the final gold recovery rate. However, approximately 20wt% of the gold was non-extractable. To determine the nature of this non-extractable gold, mineralogy liberation analysis (MLA), formation of secondary product during the bio-pretreatment, and the preg-robbing capacity of the carbonaceous matter in the ore were investigated. The results indicated that at least four factors affected the gold recovery rate:gold occurrence, tight junctions of gold-bearing pyrite with gangue minerals, jarosite coating of the ore, and the carbonaceous matter content.     

Using Co-operative Inquiry with Black Women Managers: Exploring Possibilities for Moving from Surviving to Thriving

This paper recounts and explores the early stages of a Black women managers' Co-operative Inquiry group exploring strategies for moving from surviving to thriving. The term Black describes any person perceived not to be White. It considers why Action Research methodology was perceived to be appropriate for this work, outlines key considerations attended to in setting up the inquiry, and then, briefly, explores some of the dilemmas encountered and insights gained in the process of undertaking the inquiry. To ensure confidentiality all names used are fictional ones chosen by the individuals.     

相界特征对矿物单体解离度的影响

采用模拟方法，用人工二元矿物系模拟双组分自然矿物连生体，研究了分散解离条件下，相界特征对矿物解离的影响及影响的机理．结果表明：界面形态特征对矿物单体解离的影响遵循相界面积守恒定律．通过曲线拟合，建立了相界面分维数与单体解离度之间的数学模型，该模型可用于评价相界特征对矿物解离的影响程度     

马克思主义美学视域中的审美现代性问题研究

审美现代性是近现代以来西方学界一个重要的理论话题。在西方学者那里,审美现代性是与社会现代性相对立的概念,审美现代性在资本主义制度下发挥作用的方式主要是通过自律性的审美和艺术来批判物化现实,抵抗工具理性和资本逻辑对社会的控制,但也陷入了对历史进步的怀疑和悲观主义情绪之中。马克思主义美学看到了审美现代性与社会现代性不仅有对抗的一面,更有结合和相互依赖、相互促进的一面。马克思主义从历史唯物主义的高度,既充分肯定资本主义社会现代性的积极作用和进步意义,审美现代性的发展有赖于物质生产力的高度发达,也主张通过审美现代性克服社会现代性的阶段局限性、特定时期的片面性,进而促进人的自由全面发展。     

浅谈国内人体影像艺术的发展

随着西方照相术和电影的发展,中国人越来越关心自我本体,即人体。一直以来人体艺术在中国很难被主流意识和大众所广泛接受的,甚至举步维艰。人体影像艺术作为人体艺术的分支,经历了早期发展萌芽,建国后到20世纪90年代人体影像艺术的探索和新世纪快速发展三个阶段。人体影像艺术的发展客观上促进了当代人的人性解放,随着东西方文化的不断渗透与融合,人们对人体艺术也变得宽容起来,大众与艺术家的观念有了相通共融,高尚的审美趣味更加普遍的形成。     

刍议人类解放的“物质条件最后成熟”

马克思在《哲学的贫困》中采用“物质条件最后成熟”的提法,通过研究生产力和生产关系在生产方式变迁中的关系,引申出对人类解放和物质条件之间联系的探讨.物质条件和人类解放密切相关:第一,“物质条件最后成熟”是人类解放的前提和基础;第二,人类解放和物质进步在契合中通向共同的彼岸;第三,解放的人类应当真正享有“物质条件最后成熟”的果实,同时还需拥有自主而快乐的生产劳动过程.     

袁世凯与棉纺织业的筹办

袁世凯赞成张謇的主张,认为实业救国,应以铁业、纱业为先。铁业困难,自然又以纱业为先了。袁世凯曾举荐著名实业家杨宗濂筹办河北地区的棉纺织业。并推荐周学熙督办。又请张謇为工商部总长,大力付诸实施。先后创办了华新纺织公司及其天津厂、唐山厂、青岛厂、卫辉厂,推动了全国棉纺织业的大力发展,在实业救国方面,作出了显赫的贡献。     

湖州籍音乐家陈啸空艺术歌曲《湘累》研究

湖州籍音乐家陈啸空创作的艺术歌曲《湘累》是20世纪二三十年代影响较大的一首艺术歌曲。作品将典雅的民族化风格和浪漫主义的诗文巧妙地结合起来,并利用核心音调的发展塑造音乐形象,抒发了“五四”时期知识分子对个性解放、自由平等的强烈渴望。     

劳动、技术与人类解放--恩格斯技术哲学思想探析

在《自然辩证法》、《反杜林论》等光辉著作中,恩格斯基于劳动（技术或工业）对人类社会发展的核心作用,就技术与人类生存、技术异化及技术与人类未来发展等论题阐发了一系列精湛的技术哲学思想,对于当代技术哲学研究具有重要的指导意义。