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1.
J. Martín-Gil F. J. Martín-Gil G. Delibes-de-Castro P. Zapatero-Magdaleno F. J. Sarabia-Herrero 《Cellular and molecular life sciences : CMLS》1995,51(8):759-761
Vermillion has been shown to be useful in preserving human bones from 5000 years ago. Remarkably well-preserved human bones have been found in the dolmenic burial La Velilla in Osorno (Palencia, Spain), carefully covered by pulverized cinnabar (vermillion) which ensured their preservation even in non-favorable climatic conditions. We believe the red powder was deliberately deposited for preservative use because no cinnabar mine is to be found within 160 km, because of the large amount (hundreds of kilograms) used, and because its composition, red mercuric sulphide, is similar to that of preparations used in technical embalming. This finding pushes back the data of the use of mercury ore for preservation by four millennia in South America, and by at least one millennium in the Old World. Chemical and thermal analyses of vermillion in La Velilla have demonstrated its great purity and shown that the cinnabar was pulverized and washed (but not heated), producing a bright red-orange tone. 相似文献
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《Studies in history and philosophy of science》2013,44(4):744-753
Scientific heritage can be found in every teaching and research institution, large or small, from universities to museums, from hospitals to secondary schools, from scientific societies to research laboratories. It is generally dispersed and vulnerable. Typically, these institutions lack the awareness, internal procedures, policies, or qualified staff to provide for its selection, preservation, and accessibility. Moreover, legislation that protects cultural heritage does not generally apply to the heritage of science. In this paper we analyse the main problems that make scientific heritage preservation so difficult to address. We discuss the concept and present existing preservation tools, including recent surveys, legislation, policies, and innovative institutional approaches. We briefly analyse two recent initiatives for the preservation of scientific heritage, at the Universities of Lisbon and Cambridge. 相似文献
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高海生 《河北科技师范学院学报》1997,(3)
论述了农产品储运与加工专业的学科特点和培养目标,在此基础上指出了实现这一目标的措施与手段,一方面加强专业思想教育,使学生树立坚定的事业心和使命感;另一方面,修订教学计划,组织好教材建设;详细论述了实验教学、参观教学、生产实习、毕业设计等环节在食品科技人才培养中的作用,强调了实践环节和能力培养的重要性。 相似文献
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荔枝常温保鲜初探 总被引:2,自引:0,他引:2
李济权 《广西民族大学学报》1998,(1)
采后荔枝经处理后,在常温27~34℃,相对湿度RH=76%~92%条件下,以荔枝叶碎片堆埋贮藏10天,商品果率达76.2%. 相似文献
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通过剖面测量等野外地质调查手段和"X"射线衍射分析等室内实验测试方法,分析了赣东北地区下寒武统荷塘组页岩气赋存的物质基础、孔隙特征、演化特征及构造发育特征等地质条件,在确认了下寒武统荷塘组页岩具有良好生烃条件的前提下,重点研究了荷塘组页岩气的保存条件及其差异性。研究结果表明:研究区页岩气保存条件整体良好,下寒武统荷塘组页岩含气量在(1.0~5.0)m3/t之间;受构造和岩浆活动的影响,不同地区页岩气保存条件存在差异;扬子地块、上饶地块及怀玉山区块在断裂、岩浆活动及成岩作用综合影响下,页岩层构造变形程度大,完整度遭到一定破坏,页岩气保存条件相对较差;玉山区块受后期构造运动影响小,岩浆活动弱,褶皱相对宽缓,下寒武统荷塘组页岩埋深和厚度大,页岩气保存条件相对较好。 相似文献
6.
研究了信阳毛尖茶在常温条件下不同包装方式、茶叶不同含水量和不同保鲜处理对萘叶保鲜效果的影响,确定了信阳毛尖茶常温保鲜技术的最佳方式。 相似文献
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壳聚糖与柠檬酸复配涂膜液对草莓保鲜效果的研究 总被引:2,自引:0,他引:2
将草莓分别进行壳聚糖1%-柠檬酸2 %、壳聚糖1%-柠檬酸3 %、壳聚糖1%-柠檬酸4 %、空白对照4种方式涂膜处理,于4 ℃下贮藏5 d,对其采后生理指标(颜色、硬度、腐烂率、可溶性固形物、呼吸强度、过氧化物酶和多酚氧化酶活性等)进行测定。结果表明:壳聚糖涂膜能减缓草莓贮藏过程中的褐变程度,延缓草莓果肉的软化,降低草莓的腐烂率;壳聚糖处理的草莓样品组的呼吸强度分别由32.65,33.59,32.31 mL·(kg·h)-1升至69.98,62.42,64.63 mL·(kg·h)-1,而对照组的呼吸强度升至83.98 mL·(kg·h)-1,其中壳聚糖1%-柠檬酸4 %涂膜液的保鲜效果最好。 相似文献
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植物种质超低温保存研究进展 总被引:3,自引:0,他引:3
本文概述了植物种质资源超低温保存技术发展的历史和现状,总结了该技术的基本操作步骤,影响因素和关键技术,并对其研究前景和应用前景进行了展望。 相似文献