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光滑非渗透性客体上汗潜手印经"502"胶熏显出后,常常需要进行染色来增强处理,本文研究了自制荧光磁性粉及基黄-40乙醇溶液对"502"胶熏显出的汗潜手印的染色效果,探究基黄-40乙醇溶液的最佳浓度,并与传统染色方法进行对比实验。结果表明,自制荧光磁性粉与基黄-40乙醇溶液对"502"胶熏显手印均有荧光染色作用,在紫外光激发下增强效果良好,基黄-40乙醇溶液最佳染色浓度为0.5%。 相似文献
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探究一种新型的荧光“502”用于显现潜在手印的方法.实验对该荧光“502”显现常见客体上潜在手印的效果以及显现手印的灵敏度进行了研究,并比较了这种同步熏显染色的方法与罗丹明6G、Ardrox荧光液、基础黄40二次染色方法显现手印的效果.结果表明,这种荧光“502”显现潜在手印效果较好,用Coherent Tracer激光器激发后,在橙红色护目镜下可以观察到强烈的黄色或橙黄色荧光,显出的手印纹线清晰,与背景反差明显,可以观察到手印纹线上的汗孔.荧光“502”显现潜在手印的方法操作简便,没有后续二次染色的过程,因此不会破坏手印,可以确保纹线及其细节特征的完整性. 相似文献
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随着热敏磁票纸的市场应用呈现加速发展的趋势,本文主要研究热敏磁票纸这种较新客体上常见手印的显现方法并对遗留不同时间的潜在手印显现效果进行探讨。使用金粉、磁性粉末刷显,"502"胶熏显,碘熏以及红外加热法和真空镀膜等方法对热敏磁票纸正面潜在手印均能有效显出,得到较清晰连贯纹线;使用金粉刷显、"502"胶熏显后染色对客体反面手印显现可以增强纹线和背景的反差,得到较好显现效果。粉末刷显法、真空镀膜法、碘熏法、红外加热法对于热敏磁票纸上不同遗留时间的潜在手印有较好的显现效果,具有一定的鉴定价值。 相似文献
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A magnetic chitosan (CS) composite material was synthesized successfully by a new procedure, ammonia fumigation, which is suitable for large‐scale production. CS dissolved in an aqueous acetic acid solution was mixed with [Fe(SO4)2]2? and [Fe(SO4)2]? ions to obtain a light yellow precipitate, which was then exposed to ammonia vapor to prepare the composite adsorbent product. The microstructure of the composite was studied by scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, and Fourier transform infrared spectroscopy. The results indicate that Fe3O4 particles 3–7 nm in size were formed in situ and were stabilized in the CS matrix. The composite adsorbent showed superparamagnetic properties with a saturation magnetization of about 11.0 emu/g. Moreover, the composite material displayed good adsorption of methyl orange and copper ions. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40057. 相似文献
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Soil fumigation, commonly used in vegetable production, may alter the rate of nitrification, affecting availability of N for crop use. The objective of this research was to examine effects of soil fumigation and N fertilizer source on tomato growth and soil NO3–N and NH4–N in field production. Experiments 1 and 2 included application of methyl bromide at 420 kg ha-1 to a Norfolk sandy loam (fine loamy siliceous thermic Typic Kandiudult) in combination with preplant applications of calcium nitrate, ammonium nitrate, and ammonium sulfate at 144 kg N ha-1. An additional fumigant, metam-sodium, was included in the second experiment at 703 L ha-1 (268 kg sodium methyldithiocarbamate ha-1). Experiment 3 included methyl bromide and metam-sodium, with ammonium sulfate as the sole source of N applied at 144 kg N ha-1. In the first two studies, fumigants had little or no effect on soil NH4–N or NO3–N concentration. Tomato plants were larger and fruit yield was greater in fumigated plots, but there were few growth or yield responses to N source. In the third experiment, fumigants increased concentration of soil NO3–N and NH4–N at 16 days after fumigation (DAF), however, there was no effect on nitrification owing to fumigants. It appears that N source selection to overcome inhibition of nitrification is not necessary in plant production systems that involve fumigation 相似文献
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对“涂料”与“油漆”词语内涵的历史演变,国家标准、辞典的注释进行解读和讨论,并提出对“涂料”、“油漆”、“漆”、“水性漆”及相关词语的理解和定义。 相似文献
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人类多少年的发展模式,让经济与环境成了一对“冤家”,有你没我,有我没你。现在人类终于找到了能让“冤家”变“亲家”的模式,就是循环经济。 相似文献
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近日,笔者发现有些企业的一些安全管理人员喜欢坐在办公室里抓安全,坐等职工的电话,坐等基层的汇报,坐等上级安排的统一检查行动。除此之外,就乐于坐在办公室里,造计划,写规章,办一下安全宣传板报之类的事。 相似文献
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在我国陶瓷艺术界,只要一提起阎夫立的名字,业内人士就会想起由他发明的名闻遐迩绿色环保高温低碳新瓷种"郑商瓷"。阎夫立教授现任中国民间文艺家协会陶瓷艺术专业委员会主任、郑州大学历史学院教授、陶瓷文化研究中心主任、郑州市郑商瓷工程技术研究中心主任、河南省宋庆龄基金会副主席、省管优秀专家、省重点实验室研究员。作为我国陶瓷界的领军人物,新中国绿色环保艺术陶瓷的创始人,他被誉为"东方瓷魂"、荣获国家级德艺双馨艺术家的称号、成为我国民间艺术最高奖山花奖个人终身成就奖的获得者。 相似文献
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在传统艺术中"气韵"是中国古典艺术的精神内涵.倘若说,在中国古典艺术中的"气"还停留在一种内在的审美阶段,包括自然美和社会美的成分,那么,"韵"则是一种将其以某些程式套子加以外化的过程而达到艺术美,古人说"尽善尽美",此中受制于中国传统审美心理的"气"与由之派生的具有中国气派的"韵"就自然、完美地结合在一起了. 相似文献