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在 美商天龙图书网 搜索“泉” 共有 3 种商品
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  • 万泉河流域鱼类图鉴(精)

  • 所属分类：农业科学>>农业科学>>林牧渔业     作者：编者:申志新|责编:杨晓改//李文文     出版社：中国农业
  •     本图鉴是近几年海南省 海洋与渔业科学院淡水渔业 研究所（海南淡水生物资源 及生态环境保护研究中心） 对万泉河鱼类调查与监测的 工作成果，书中包含着科研 人员的智慧与付出。本图鉴 收录了万泉河流域淡水...地为读者展示了 万泉河鱼类的种类、分布等 本底状况，可作为一本图文 并茂的科普读物供从事万泉 河鱼类
  • 人民币：RMB 180.00 元     售价：NT$ 720.00 元
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  • 游泳池温泉中去除隐孢子虫卵囊的技术方法研究(英文版)

  • 所属分类：农业科学>>农业科学>>林牧渔业     作者：路平|责编:李敬     出版社：中国矿大
  •     Cryptosporidium outbreaks in recreational water venues have threatened public health, especially in swimming pools. There is still no reliable treatment technique to remove Cryptosporidium oocysts from swimming pools. The performance of six coagulants and granular materials on Cryptosporidium removal from pools was evaluated. Seeding methods of coagulants and their dosage versus oocysts concentrations were tested. Results indicated oocysts removal efficiency for feeding oocysts and coagulant simultaneously were more than 99 (2 log), and continuously feeding of coagulant achieved at least 99％(2 log) removals, compared with removal efficiency was 20％ by control experiment without coagulation. All of these experiments indicated that the polymer coagulant should be fed by pump automatically and continuously in order to maximize oocysts removals. In addition, oocysts concentration impacted the system performance. The higher oocysts concentration consumed more polymer. Overall, polyDEDMAC and PAX is effective and promising coagulants to improve oocysts removals from swimming pools. Furthermore, granular materials were effective to remove Cryptosporidium but filter pressure was significantly increased.
  • 人民币：RMB 26.00 元     售价：NT$ 104.00 元
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