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公开(公告)号：US4237052A
公开(公告)日：1980-12-02
申请号：US12459
申请日：1979-02-15
申请人： Fredj Fitoussi , Paul Maldonado
发明人： Fredj Fitoussi , Paul Maldonado
摘要： A process for the preparation of bitumen-polymer compositions, characterized by the fact that the bitumens are modified by grafting of a dihalopolybutadiene polymer that serves as a receptive structure to block polymers and to elastomers co-vulcanizable with the grafted bitumen.The elastomers are selected from the group that includes linear polybutadiene-polystyrene block copolymers, a polystyrene-polybutadiene block copolymer, and a vulcanizable polynorbornene rubber. They are used as road and industrial bitumens.
摘要翻译： 一种制备沥青聚合物组合物的方法，其特征在于通过接枝用作阻聚聚合物的接受结构的二卤代聚丁二烯聚合物和与接枝的沥青共可硫化的弹性体来修饰沥青。 弹性体选自线性聚丁二烯 - 聚苯乙烯嵌段共聚物，聚苯乙烯 - 聚丁二烯嵌段共聚物和可硫化聚降冰片烯橡胶。 它们被用作道路和工业沥青。
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公开(公告)号：US3997399A
公开(公告)日：1976-12-14
申请号：US577446
申请日：1975-05-14
申请人： Paul Maldonado , Max Charpentier
发明人： Paul Maldonado , Max Charpentier
CPC分类号： C12P7/48 , C12N1/38 , Y10S435/923
摘要： The invention relates to a process for the production of citric and osocitric acids by a culture of a diploid Candida Lipolytica yeast in a nutrient medium containing substances which are sources of carbon, nitrogen, and mineral compounds, the medium containing thiamin in a concentration in excess of 200 micrograms per liter.
摘要翻译： 本发明涉及一种通过二倍体解脂多糖酵母培养在含有碳，氮和矿物质化合物来源的营养培养基中培养柠檬酸和次酸的方法，所述培养基含有过量浓度的硫胺素 每公升200微克
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公开(公告)号：US3996106A
公开(公告)日：1976-12-07
申请号：US521521
申请日：1974-11-06
CPC分类号： C12P7/48 , Y10S435/923
摘要： This invention relates to the production of citric and/or isocitric acids. The production of citric and/or isocitric acids is effected by cultivating a citric and/or isocitric acid-producing yeast in a culture medium containing a compound selected from cyanoacetic acid, and organic and inorganic derivatives thereof. Increased yields of citric and isocitric acids are obtained using a process in accordance with the invention, preferably using a yeast of the genus Candida.
摘要翻译： 本发明涉及柠檬酸和/或异柠檬酸的生产。 柠檬酸和/或异柠檬酸的生产通过在含有选自氰基乙酸及其有机和无机衍生物的化合物的培养基中培养产生柠檬酸和/或异柠檬酸的酵母来实现。 柠檬酸和异柠檬酸的产率提高是使用根据本发明的方法获得的，优选使用假丝酵母属的酵母。
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公开(公告)号：US3930946A
公开(公告)日：1976-01-06
申请号：US418838
申请日：1973-11-26
CPC分类号： C12N15/00 , C12P7/50 , Y10S435/923
摘要： A process for the preparation of a stable diploid of Candida lipolytica which comprises (a) in a first stage, separately cultivating two haploid strains of Candida lipolytica of opposed sign in a medium rich in assimilable carbon nutrient; (b) in a second stage, cultivating the two resultant strains together in a medium poor in assimilable carbon nutrient; and (c) in a third stage, after the appearance of diploid colonies, treating them with a mutagenic agent to stabilize them. The invention also comprises a process for the preparation of .alpha.-ketoglutaric acid which comprises cultivating a diploid strain obtained by crossing two Candida lipolytica haploid strains of opposite sign in a medium containing, as source of assimilable carbon, at least one hydrocarbon.
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