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书籍按需印刷的兴起 计算机技术和互联网的迅速发展,使我们的生活发生了巨大的变化,出版印刷行业也出现了网络出版、在线出版和电子出版等新概念和新的业务模式。网络出版物的形式大致可以分成3类:在计算机上直接阅读的万维网页、PDF文件或ebook等;通过专门的阅读器阅读的ebook;通过按需印刷方式将从网络上购买或下载的出版物内容转移到纸介质上阅读。 相似文献
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近年来,随着报业的迅猛发展,报纸印刷厂所面临的一个重要而突出的问题,就是如何在现有生产能力情况下,最大限度地满足客户及市场的需求,做好按需印刷,既使客户满意,又使印刷厂获得较好的效益. 相似文献
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按需印刷在中国是一个新事物,新事物自有新事物的朝气与活力,但与“新”俱来的不可避免地还要有种种的混沌与不安,焦虑与怀疑。按需印刷就是如此,虽然作为一个新兴的行业,按需印刷已经显示出蓬勃发展的趋势,但对它的怀疑也随之而来。许多关注或有意于按需印刷的业内人士常常被这样一些实践之外的问题所迷惑:什么是按需印刷?按需印刷的优势与定位在哪里?中国的按需印刷市场究竟有多大,前景如何?如果要做按需印刷,应如何选择设备?在新事物发展之初,这样的疑惑是在所难免的,但长此以往势必要影响新事物正常的发展历程。为此,本期我们特别邀请了一批按需印刷的业内专家、从业人员和设备供应商,就按需印刷的相关问题展开讨论。 相似文献
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你可曾想过:当快递员把你精心挑选的图书送到你手上时,你能感觉到它的热量——它是一本"热气腾腾"、 "刚出炉"的书,因为15分钟前快递员才从印刷设备中将它取出.对于消费者而言,似乎难以想象,但是对于印刷行业,这是真切发生的.在美国风云变幻的按需出版市场中,这种"热气腾腾"的书已走进了人们的生活.下面,笔者将带领大家走进美国按需出版及按需出版印刷市场.美国按需出版风生水起
目前,按需出版在美国正呈现方兴未艾之势.2008年,美国按需出版的图书品种首次超过传统出版;2009年,美国按需出版的图书品种同比增长181%;2010年,美国按需出版的图书品种同比增长169%;2011年,美国按需图书出版申请的ISBN号已达到110万个. 相似文献
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莫非 《印刷质量与标准化》2013,(5)
现代商务环境所体现出的个性化与多元化趋势越来越明显,对个性化印品的需求数量成倍增加.在这种外界环境当中,传统印刷已不能满足这种类型印刷的需要.而具备按需印刷特点的数字出版却为这种小批量、彩色的个性化印刷提供了可能,也成为印刷厂商和大型输出中心关注客户的最终需求,从加工模式向服务模式实现转型的重要途径. 相似文献
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经过15年的努力,我国恢复关贸总协定(GATT)缔约国地位和加入世界贸易组织(WTO)的谈判已近尾声。据权威人士估计,如果不出现美国轰炸我驻南使馆那样的重大突发事件, 相似文献
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《International Journal of Food Science & Technology》1969,4(3):235-240
Summary. The atomic absorption technique has been used in the analysis of tobacco ash and a number of common consumable items, namely water, salt, lettuce and potato, for their content of lithium in view of the apparent medical importance of this element. 相似文献
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不同卷烟和烟叶中主要多酚含量的差异 总被引:3,自引:0,他引:3
为了探索不同卷烟配方和不同产地烤烟中绿原酸和芸香苷含量的差异,利用高效液相色谱技术,对2个卷烟品牌系列产品以及湘南、湘西、云南和国外烤烟中的绿原酸和芸香苷含量进行了分析。结果表明,不同卷烟配方中绿原酸和芸香苷的含量及其比值不同,LR系列卷烟的绿原酸与芸香苷比值在1.20~1.40之间,WS系列卷烟的绿原酸与芸香苷的比值则在1.42~1.64之间,且高档卷烟中这2种主要多酚的含量均高于中低档卷烟;湘南烤烟中绿原酸和芸香苷的平均含量均高于湘西烤烟,湘南烤烟中主要多酚的总量在27.02~34.37mg/g之间,湘西烤烟中主要多酚的总量在20.80~25.98mg/g之间;美国和湖南烤烟中绿原酸与芸香苷含量的比值均大于1.5,津巴布韦、巴西、南非、赞比亚和云南烤烟中绿原酸与芸香苷含量的比值都在1.5以下。 相似文献
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Chia-Jung Lee Lih-Geeng Chen Ting-Lin Chang Wei-Ming Ke Ying-Fei Lo Ching-Chiung Wang 《Food chemistry》2011
In this study, well-known skin-care functional parameters were used, including UV absorption, DPPH-scavenging, NO-production-inhibition, tyrosinase-inhibition activity and anti-Staphylococcus aureus activity to measure the effects of the 70% acetone-extracts form 28 species of Lamiaceae plants. Further, the phytochemical contents were explored by total phenol (TP), total flavone (TF) and total coumarin (TC). The correlation between the skin-care effects and the phytochemical contents was analysed by non-parametric correlation analysis. Amongst the 70% acetone-extracts, Origanum majorana displayed the strongest DPPH-scavenging and tyrosinase-inhibitory effects and the richest phenol content. Based on the statistics results, the phytochemical contents were related with those parameters, such as: DPPH-scavenging effects vs. TP (R = 0.542), TF vs. TP (R = 0.613), and NO-inhibitory vs. anti-bacterial activities (R = 0.767). Moreover, each genus of Lamiaceae had different properties of skin-care effects. Form our research works, the Lamiaceae is good resources to develop skin-care cosmetics. 相似文献
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W A Dewar 《Journal of the science of food and agriculture》1967,18(2):68-71
A series of foods used in poultry feeding in the United Kingdom was analysed and the zinc and manganese contents are reported. 相似文献
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研究从不同的角度来评价鼠尾草提取物的抗氧化活性。采用50%丙酮和70%乙醇两种溶剂对鼠尾草进行提取,用Folin-Ciocalteu法测定提取物中的多酚含量,并用四种方法,即清除DPPH(1,1-二苯基-2-三硝基苯肼)自由基法、螯合Fe2+法、还原力法和磷钼络合物法测定提取物的抗氧化活性。研究结果表明,50%丙酮提取物中的多酚含量显著高于70%乙醇提取物。鼠尾草提取物具有良好的自由基清除能力、螯合Fe2+能力、还原能力和总抗氧化能力。鼠尾草50%丙酮提取物的抗氧化活性总体上比70%乙醇提取物高(还原力除外)。 相似文献
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Eighteen varieties of limabean (Phaseolus lunatus), were subjected to the processes of cooking, autoclaving, soaking in water and germination for 6 days. The effects of these processes on the free and bound HCN contents of the raw limabean varieties were investigated. Total HCN in the raw varieties ranged from 265 mg kg?1 in TPL 071-33 and 553 mg kg?1 in TPL 13. Considerable variability was encountered in the different varieties and processing effects tended to make these varietal differences even more pronounced. Autoclaving gave a mean total loss of 53·9% in total HCN content while cooking effected a 64·8%–81·9% loss in total HCN content. Drastic reductions in both free and bound HCN contents were obtained in all cooked varieties. Soaking for 2 days effected the highest HCN loss in TPL 2 (40·1%), closely followed by TPL 13 (39·7%) and then TPL 3 (35·4%). All varieties, by the sixth day of soaking, lost between 61·3 and 86·4% of their total HCN contents. The effect of germination on HCN contents increased progressively from a mean total loss of 24·5% in day 2 to 55·6% in day 4 and 76·1% in day 6. Cooking and germination for 6 days appeared to be equally effective in reducing free and bound contents. Autoclaving was the least effective of all the processes studied. 相似文献