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“天工翦水,宇宙飘花,品之,有四美焉;落地无声,静也;沾衣不染,洁也;高下平铺,匀也;洞窗辉映,明也宜长松修竹,老梅片月,怪石峻增,深林窈窕,寒江远浦,断岸小桥,古刹层峦,疏篱幽径;老叟披蓑垂钓,骚人跨蹇灵诗,小酌清淡,高楼长啸,船头茶灶飘烟,座上黛眉把盏,老僧对座,韵士闲枰;披鹤氅,纵步园林;御貂裘,登临山水。如此景况,何必峨眉千尺”。晚明吴澜先撰写的《赏心乐事五则》,完全是近古南方文人的笔墨,但也写出了雪景山水的某些特色,细读品味,足以窥聆出其中的文化韵律。 相似文献
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答:1 从包装上判断
从外观包装上查看,若包装塑料编织袋的材质质量差,松软强度低,做工粗糙、编织稀疏,颜色发灰绿色,内部没有防潮塑料袋,撒料,三无产品或外观标识不齐全的石膏粉不符合质量标准,档次低,质量没有保证;反之,包装塑料编织袋用材好,做工精致,颜色发白,强度高,编织经纬密集,内部有防潮塑料袋。 相似文献
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1月5日,新年的第一场雪骤降豫南地区,气温降至零下2摄氏度,河南油田采油二厂古城油矿及早安排,立即启动特殊天气生产应急预案,生产一线干部职工斗风雪,排故障,扶躺井,加密油井巡回检查,加强设备管理,确保一寸管线不被堵,一口油井不停抽,一台设备不冻坏,保证油井时律,确保安全生产。 相似文献
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我国染颜料中间体投资热点分析 总被引:5,自引:0,他引:5
该文介绍了邻甲基水杨酸,K酸,对氯苯甲醛,2,6-二氯苯甲醛,2,6酸,3,3‘-二氯联苯胺,间苯二酚,间氨基酚,苯基苯酚,吲哚衍生物等染料中间体国内生产现状、应用和合成技术及发展趋势。 相似文献
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王首浩,号墨池渔夫,山东淄博人,定居北京,毕业于中国美术学院,自幼喜绘画,并长年研究国画刻瓷艺术,曾多次参加国内外陶瓷艺术大展并获奖,近年来师从陶瓷艺术大师阎先公先生,在陶瓷艺术领域取得新的可喜成绩。现为中国民主促进会会员,中华书画委员会委员,海峡两岸艺术研究会理事, 相似文献
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考察了六水合硝酸锌、四水合磷酸锌、七水合硫酸锌、氧化锌、碳酸锌、碱式碳酸锌、氢氧化锌、甲酸锌、二水合乙酸锌、二水合环己烷丁酸锌(ZCHBDH)以及二水合硬脂酸锌,在1,5-萘二胺(NDA)与碳酸二甲酯(DMC)甲氧基羰基化合成1,5-萘二氨基甲酸甲酯(NDC)反应中的催化性能。结果表明,六水合硝酸锌和氧化锌等无机锌盐对该甲氧基羰基化反应没有催化作用,而二水合乙酸锌、ZCHBDH以及二水合硬脂酸锌对该甲氧基羰基化反应却有催化活性。当该甲氧基羰基化反应在n(DMC)∶n(ZCHBDH)∶n(NDA)=37∶0.03∶1的条件下于150℃反应5 h,NDA的转化率为100%,NDC的选择性达99%。 相似文献
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以含氨基有机酸和氧化锌为原料,制备了4种含氨基锌盐,对产品进行了分析;以硬脂酸锌做对照物,测试了甘氨酸锌、氨三乙酸锌、对氨基苯磺酸锌、邻氨基苯甲酸锌对PVC的热稳定性能,通过热老化箱实验法、刚果红试纸法对含氨基锌盐及其复配系统进行了综合评价。结果表明,含氨基的锌盐对PVC具有较好的长期热稳定性能,与硬脂酸钙具有较好的协同作用。 相似文献
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Field experiments with wheat were conducted for two years on flood plain alluvial soils to study the effectiveness of soil application of zinc sulphate and zinc oxide at 0, 15, 45, 60, 75 and 90 days after sowing. Yield and zinc uptake of wheat increased significantly with the application of zinc. Delaying the application of both zinc sulphate and zinc oxide up to 45 days of sowing did not adversly affect the zinc nutrition of wheat. However, delaying the application for 75 or 90 days after sowing eliminated the response. Zinc sulphate, when applied within 60 days of sowing performed better than zinc oxide. In a laboratory study, zinc sulphate maintained a higher level of zinc in the soil solution than zinc oxide at least over a 3-week period. 相似文献
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Preliminary comparative studies of zinc and zinc oxide electrodes on corrosion reaction and reversible reaction for zinc/air fuel cells 总被引:1,自引:0,他引:1
Even though Zn/air energy system is considered to be a promising power energy source, it has been limited to be applied for an electrically rechargeable system basically due to the problem of the irreversible reaction and the corrosion reaction. In this paper a novel attempt has been made to compare the behavior of zinc electrode with a zinc oxide electrode and a modified zinc oxide electrode containing zinc oxide and lead oxide. The hydrogen overpotential is favorable in the zinc electrode, and the modified zinc oxide electrode shows the improved properties showing the more negative potential than the case of the zinc oxide electrode. Investigations of cyclic voltammogram reveal that the pure zinc electrode is irreversible, while both the zinc oxide and the modified zinc oxide electrodes are reversible. However, as far as dendrite formation is concerned there is no marked improvement in case of the zinc oxide and the modified zinc oxide electrodes. 相似文献
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D. C. Joyce D. G. Edwards C. J. Asher L. C. Bell 《Nutrient Cycling in Agroecosystems》1988,17(3):235-250
Thermoplastic matrix controlled-release (C.R.) zinc fertilizers are produced by extruding a mixture of zinc salt and inert polymer material. Three methods of laboratory evaluation were used to characterize a range of C.R. zinc formulations differing in concentration and nature of zinc salt, carrier matrix, and size. The methods were (i) electron microscopy, (ii) zinc emission into water, and (iii) zinc diffusion in indicator-agar. These methods complemented each other, with electron microscopy elucidating physical features governing zinc release from the fertilizer pellets. Finely divided particles of soluble zinc salt, for instance, were associated with formulations whose release characteristics approached theoretical (time)0.5 -order release kinetics. Apart from zinc particle size, other factors controlling zinc emission characteristics were the type of zinc salt, the zinc loading, and pellet size. Varying the polymer matrix materials had little or no effect on zinc release from the C.R. zinc formulations compared in this study. 相似文献