Bioavailability to rats of zinc, magnesium and calcium in casein-, egg- and soy protein-containing diets.
Bioavailability to rats of zinc, magnesium and calcium in casein-, egg- and soy protein-containing diets.
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大鼠在含酪蛋白、鸡蛋和大豆蛋白的饮食中锌、镁和钙的生物利用度。
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
John W. Erdman
中科院分区：
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作者：
Richard M. Forbes;K. Weingartner;H. Parker;Roma R. Bell;John W. Erdman
研究了几种大豆制品中锌、镁的生物利用率以及添加大豆制品对锌、钙生物利用率的影响。用全脂大豆粉（SF）、冻干大豆饮料（SB）和大豆浓缩物（SC）等饲料蛋白质，对刚断乳的雄性大鼠进行全饲或部分饲以。在测试SP中矿物质生物利用度的实验中，在等氮基础上用SP的增量水平代替鸡蛋白色（Zn研究）或酪蛋白（Mg研究）。在白色或酪蛋白基础日粮中添加不同水平的ZnCO 2或MgCO 3。在试验中，在含SP的日粮或酪蛋白（Ca研究）或白色（Zn研究）的基础日粮中添加不同水平的CaCO 3或ZnCO 3，以测试SP的存在对柔软金属矿物质的生物利用度的影响。线性回归分析表明，胫骨（或股骨）总锌、镁或钙与增加的膳食矿物质有关，生长（锌研究）和血清镁也与膳食矿物质浓度有关。结果表明，大豆制品中锌的有效性较差，尤其是大豆蛋白;大豆蛋白和大豆蛋白中镁的有效性较高;大豆蛋白中镁的利用率较好，但低于其他大豆蛋白;大豆蛋白中钙的有效性较高，而大豆蛋白中锌的有效性不高。处理SC或其植酸盐与锌的摩尔比升高所涉及的条件可能导致内源性锌和镁以及添加的锌的生物利用度降低。J.营养109：1652-1660，1979.
The bioavailability of zinc ( Zn ) and magnesium ( Mg ) from several soybean products (SP) as well as the effect of the presence of dietary SP upon the bioavailability of added Zn or calcium (Ca) was investigated. Male, weanling rats were fed all or part of their dietary pro tein as full fat soy flour ( SF ), freeze-dried soy beverage ( SB) or soy con centrate (SC). In experiments testing the bioavailability of minerals from SP, incremental levels of a SP were substituted on an isonitrogenous basis for egg white (Zn studies) or casein (Mg studies). Graded levels of ZnCOa or MgCOs were added to egg white or casein basal diets. In experiments testing the effect of the presence of SP upon the bioavailability of supple mental minerals, graded levels of CaCOs or ZnCO3 were added to SP-con- taining diets or casein (Ca studies) or egg white (Zn study) basal diets. Linear regression analyses related total tibia (or femur) Zn, Mg, or Ca to in creased dietary mineral. Growth (Zn studies) and serum Mg were also related to the dietary mineral concentration. The results showed that Zn was poorly available from soy products, especially SC. Mg was highly available from SF and SB; Mg utilization from SC was good but less than from the other SP. Ca added to all SP was highly available, while Zn added to SC was not fully available. Conditions involved in processing SC or its elevated phytate to zinc molar ratio may have resulted in reduced bioavailability of endogenous Zn and Mg and of added Zn. J. Nutr. 109: 1652-1660, 1979.