Biological material embedded in hydrogels, a process for the embedding
thereof, and its use as artificial seed
    2.
    发明授权
    Biological material embedded in hydrogels, a process for the embedding thereof, and its use as artificial seed 失效
    嵌入水凝胶中的生物材料,其嵌入方法及其作为人造种子的用途

    公开(公告)号:US6164012A

    公开(公告)日:2000-12-26

    申请号:US230379

    申请日:1999-04-27

    CPC分类号: C05G3/0047 A01H4/001 A01N3/00

    摘要: The invention relates to a completely biodegradable hydrogel comprising polyester polyurethane polyurea containing urea groups as well as polysaccharides and/or their derivatives, the hydrogel containing plant material capable of dividing. The invention also relates to a process for the embedding of the biological material and the fabrication and shaping of the hydrogels from aqueous solutions. The hydrogels according to the invention may be used as coating material for embedding biological material capable of dividing, especially plant material, preferably plant cells, protoplasts, plant tissues and plant organs, as well as zygotic or somatic plant embryos, under sterile conditions for the purpose of protecting the material during storage, transport and handling. The hydrogels according to the invention may also contain further additives, for example, plant protection agents or nutrients. The embedded biological plant material according to the invention may be used as artificial seed.

    摘要翻译: PCT No.PCT / EP97 / 03906 Sec。 一九九九年四月二十七日 102(e)1999年4月27日PCT 1997年7月21日PCT公布。 公开号WO98 / 05197 日期1998年2月12日本发明涉及包含含有尿素基团的聚酯聚氨酯聚脲以及多糖和/或其衍生物的完全可生物降解的水凝胶,所述水凝胶含有能够分裂的植物材料。 本发明还涉及用于从水溶液中包埋生物材料和水凝胶的制造和成型的方法。 根据本发明的水凝胶可以用作在无菌条件下包埋能够分裂的生物材料的涂层材料,特别是植物材料,优选植物细胞,原生质体,植物组织和植物器官以及合子或体细胞植物胚胎 在储存,运输和处理过程中保护材料的目的。 根据本发明的水凝胶还可以含有其它添加剂,例如植物保护剂或营养物质。 根据本发明的嵌入式生物植物材料可以用作人造种子。

    Polymer blends containing starch and polyurethane
    3.
    发明授权
    Polymer blends containing starch and polyurethane 失效
    含淀粉和聚氨酯的聚合物共混物

    公开(公告)号:US6008276A

    公开(公告)日:1999-12-28

    申请号:US973038

    申请日:1997-11-24

    摘要: Thermoplastically moldable, biodegradable, starch-containing polymer blends consisting essentially ofA) 100 parts by weight of anhydrous starch,B) from 0.1 to 70 parts by weight of polyurethane containing urea groups and based on selected starting materials,C) from 0.5 to 70 parts by weight of a plasticizer component andD) from 2 to 20 parts by weight of water,a process for producing these blends by mixing the individual components in plastics processing machines and their use for producing moldings, films, fibers, coatings or laminates by thermoplastic processing.

    摘要翻译: PCT No.PCT / EP96 / 02161 Sec。 371日期:1997年11月24日 102(e)日期1997年11月24日PCT提交1996年5月20日PCT公布。 出版物WO96 / 38502 日期1996年12月5日热塑性可成型,可生物降解的含淀粉聚合物共混物,主要由A)100重量份的无水淀粉,B)0.1-70重量份的含尿素基团的聚氨酯和基于选定的原料C )0.5至70重量份的增塑剂组分和D)2至20重量份的水,通过在塑料加工机中混合各组分制备这些共混物的方法及其用于生产模制品,薄膜,纤维的方法 ,涂层或层压板通过热塑性加工。

    Thermoplastic cellulose ether ester graft copolymers and process for
their production
    7.
    发明授权
    Thermoplastic cellulose ether ester graft copolymers and process for their production 失效
    热塑性纤维素醚酯接枝共聚物及其制备方法

    公开(公告)号:US5466794A

    公开(公告)日:1995-11-14

    申请号:US245350

    申请日:1994-05-17

    摘要: The present invention relates to novel thermoplastic, water-insoluble cellulose hydroxyalkyl hydroxycarboxylic acid esters of the general structureCell--O--Rwhere Cell--O is the substituted OH group of a polymeric cellulose unit and R is either a monomeric and/or polymeric hydroxyalkylether hydroxycarboxylic acid ester of the structure X:X=--A--B--in which A is a linear polyether chain:A=(--D--O--).sub.nin which D signifies a linear aliphatic branched or unbranched chain with 2 to 11 C atoms and n is a whole number equal to or greater than 1, and B is a linear polyester chain: ##STR1## in which E signifies a linear aliphatic branched or unbranched chain with 2 to 5 C atoms and m is a whole number equal to or greater than 1, or R is equal to A or B or X and a combination thereof in any ratio, or R is equal to H (hydrogen) according to the degree of substitution per anhydroglucose unit (max. 3) with A, B or X, and a process for their production and use of these cellulose derivatives as biodegradable mouldings.

    摘要翻译: 本发明涉及通用结构为Cell-OR的新型热塑性,水不溶性纤维素羟烷基羟基羧酸酯,其中Cell-O是聚合纤维素单元的取代的OH基团,R是单体和/或聚合羟基烷基醚羟基羧酸 酯结构X:X = -AB-,其中A为直链聚醚链:A =( - DO-)n,其中D表示具有2至11个C原子的直链脂族支链或非支链,n为整数 数目等于或大于1,B是线性聚酯链:其中E表示具有2至5个C原子的直链脂族支链或非支链链,m是等于或大于1的整数,或 R等于A或B或X及其任何比例的组合,或者R等于H(氢),根据每个脱水葡萄糖单元的取代度(最多3)与A,B或X,以及工艺 用于生产和使用这些纤维素衍生物作为生物降解 可塑成型品。