共查询到20条相似文献,搜索用时 31 毫秒
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我们的读者Gladys喜欢拍摄冲浪,但她觉得自己需要一些帮助才能提高,我们的专家将从器材使用和拍摄技巧等方面对她进行辅导。 相似文献
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我们的读者Gladys喜欢拍摄冲浪,但她觉得自己需要一些帮助才能提高,我们的专家将从器材使用和拍摄技巧等方面对她进行辅导。 相似文献
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在银装素裹之下,即使是一些平时习以为常的平淡景物,也会瞬时变得壮丽宏伟或是楚楚动人。在本节中,我们将为大家呈现拍摄精彩雪景的秘诀。 相似文献
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在所谓的摄影黄金时刻,整个大地都被镀上一层迷人的金色光芒,你是否为拍摄这样美丽的画面做好准备了呢? 相似文献
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当前,对室内植物污染的监测及改进国内外研究已经从宏观角度进入了微观角度,即,从植物的外部数量演化为当前的生活指标,甚至为微纳领域的优化改进。基于室内植物墙吸附室内化学污染的角度,通过实验方法制备新型微米线实现室内植物墙新的应用。实验通过水合肼用作的还原剂实现了植物材料防护微米线的制备,通过SEM、XRD、VSM等测试方法,验证了材料一系列特性。结果表明:制备的防护微米线表现有序的排列,没有出现明显的团聚情况,整体形貌特征良好。制备实现了优秀的产品;还原剂早期实现了较好的水合肼的吸附,表现为较稳定的情况,在后期,粒子间出现了一定团聚的现象,说明还原过程呈现为不稳定情况;制备材料没有明显的其他物质的衍射峰,制备材料具有材料的纯净性。 相似文献
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In this study total concentration, viability, culturability of indoor and outdoor bioaerosols in ten residential environments were studied by using a cultivating method and an epifluorescence microscopy method with fluorochrome (EFM/FL) using four different dyes (AO, DAPI, PI, and YOPRO-1). Results from the EFM/FL were then compared with those from the traditional cultivating method. The total indoor microbial cell concentrations measured by EFM/FL was 630 to 5200 times higher than that measured by the cultivating method; ranging from 1.38 × 106 to 4.48 × 106cells/m3 (microbial cells per cubic meter) with AO staining, and from 7.84 × 105 to 2.75 × 106 cells/m3 with DAPI staining, compared with the average concentration of 721 CFU/m3 for bacteria and 587 CFU/m3 for fungi by the cultivating methods. The viability of bioaerosols ranged from 0.63 to 0.92 by EFM/FL with PI staining, from 0.19 to 0.72 by EFM/FL with YOPRO-1 staining, and from 0.0002 to 0.0015 by the cultivating method. The viability determined by EFM/FL was much higher than the culturability. In summary, the total microbial cell concentration and viability were highly underestimated by the cultivating method. In conclusion, EFM/FL method can effectively assess the total concentration and viability of bioaerosols in indoor samples. 相似文献
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