私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯系方式
  • 通信地址:蘇州市工業園區仁愛路199號,蘇州大學材料與化學化工學部
  • 郵編:215123
  • 電話:0512-65882521
  • 傳真:
  • Email:
當前位置:> 首頁 > 論文著作 > 正文
Granular Urea-formaldehyde Slow-release Fertilizer with Superabsorbent and Moisture Preservation Properties
作者:Mingyu Guo, Mingzhu Liu*, Rui Liang, Aizhen Niu
關鍵字:slow-release fertilizer; superabsorbent polymers; urea formaldehyde; moisture preservation
論文來源:期刊
具體來源:J. Appl. Polym. Sci, 2006, 99, 3230-3235.
發表時間:2006年
To improve the utilization of fertilizer and water resource at the same time, a new type of slow-release fertilizer with superabsorbent and moisture preservation was developed, with the combination of slow-release technique and superabsorbent polymers. The coatings were
formed by the inverse phase polymerization technique. The element analysis results showed that the product contained 22.58% nitrogen element, and the water absorbency of the
product was 94 times its own weight if it was allowed to swell in tap water at room temperature for 2 h. The results of the slow-release behavior of N and the water absorbency and retention properties in soil showed that the product not only had good slow-release property but also had excellent water absorbency and water retention capacity, which was a significant advantage over the normal slow-release or controlled-release fertilizers. The effects of the amount of initiator, crosslinker, reaction time, and the degree of neutralization of acrylic acid on water absorbency were investigated and optimized. At the same, a rather new and simple method was used to make homogeneous urea-formaldehyde
granules.
主站蜘蛛池模板: 太和县| 丹凤县| 阳东县| 华宁县| 凉城县| 准格尔旗| 敦煌市| 永善县| 兴仁县| 二连浩特市| 北票市| 唐河县| 镇巴县| 临沭县| 江津市| 台江县| 嘉祥县| 富锦市| 太谷县| 东宁县| 灵石县| 苗栗市| 永川市| 兴国县| 泊头市| 华池县| 南靖县| 北京市| 海丰县| 绍兴县| 健康| 巴塘县| 柘城县| 邻水| 龙海市| 洪雅县| 延津县| 丰台区| 合肥市| 太湖县| 尼玛县|