共查询到20条相似文献，搜索用时 250 毫秒
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不同方法提取星虫多糖及抗氧化活性研究综述 总被引：1，自引：0，他引：1
《内江科技》2020,(2)
方格星虫味道鲜美,营养丰富,应用广泛。查阅大量文献,方知方格星虫具有丰富的药用价值,其体内多种活性成分尚未得到开发与应用,因此具有广阔的研究前景。本文通过方格星虫多糖含量以不同提取方法提取比较及抗氧化活性研究综述,比较方格星虫多糖不同提取方法的优缺点及方法,让更多的人了解到方格星虫,并进行合理开发和利用,为后续研究方格星虫多糖抗氧化活性研究提供借鉴。 相似文献
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家蚕雌蛾体中微量元素和脂肪酸的分析 总被引：1，自引：0，他引：1
分析了家蚕雌蛾体中微量元素和脂肪酸的含量,并对其质量进行了评价.家蚕雌蛾体富含微量元素,检测的10种常见微量元素的加和量和人体必需宏量元素含量分别为27339.30 mg/kg和26900.00 mg/kg,其中人体需要量较大的4种微量元素(锌、铁、铜和锰)含量高于重要中药资源昆虫芫菁科昆虫蛾体中的含量.并且适合于人体日需要量.家蚕雌蛾体含有丰富的不饱和脂肪酸,其中必需的n-3系列多不饱和脂肪酸亚麻酸含量最高(39.88%),是鸡蛋的40倍和牛奶的38倍,并高于亚油酸含量6.5倍.研究结果显示,家蚕雌蛾是开发保健食品和医药品的优质原料. 相似文献
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刺五加提取物对断奶仔猪氨基酸消化吸收的影响 总被引：1，自引：0，他引：1
试验选用体重相近的21日龄断奶的三元杂交仔猪60头，按完全区组设计分为3个处理，处理1饲喂添加0.10%刺五加提取物日粮，处理2饲喂添加0.02％硫酸粘杆菌素日粮，处理3饲喂基础日粮. 分别于添加后第7、14和28 d每个处理随机取5头试猪，前腔静脉采血，测定血清游离氨基酸含量；采血后的试猪经麻醉处死，取回肠末端食糜测定其中的氨基酸含量. 结果表明，随着饲喂时间的延长，刺五加提取物显著提高仔猪血清中游离氨基酸的含量，降低回肠食糜中氨基酸的含量. 提示刺五加提取物可促进断奶仔猪对蛋白质的消化，增加小肠对氨基酸的吸收，有助于仔猪的生长. 相似文献
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砂生槐(Sophora moorcrofiana)是藏南河各地带分布极广的一种多年生豆科灌木,具有极强的抗旱、耐瘠、抗风沙等生态适应性。目前当地群众挖其植株作为生活燃料,嫩枝叶或干叶为牲畜放牧和越冬饲料.破坏相当严重。为充分开发其利用价值,首次取其不同时期嫩枝叶和种子进行营养成份分析,发现其富含蛋白质16.82—30.60％;脂肪1.60—9.39％;17种氨基酸含量达16.13—24.53％;除色氨酸未能测定外,其余7种必须氨基酸含量均高于箭舌豌豆(Vicia Sativa)、青稞(highland barley)、小麦(Triticum aestivum)和豆科牧草紫花苜宿(Midicum aestivum);热值13461—21029kJ/kg,具有较高的饲用或食用开发价值。 相似文献
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探索催化剂的最佳制备条件及合成反应的最佳工艺条件,从而使C02和乙醇反应合成乙酸乙酯具有较高的选择性和收率。结果表明：用氢氧化钠作沉淀剂,采用共沉淀法制备Cu／Zn／A1／Co催化剂,沉淀时PH值为11,Cu、Zn、AI物质的量之比为9：8：15,加入Co的量为Cu、Zn、Al物质量总和的15％时制备所得的催化剂活性最好;在反应温度400℃,反应压力0．6MPa,乙醇与二氧化碳进料体积比为1：150,乙醇进料速度为0．3mL／min时合成反应最佳,此时乙醇的转化率为53．33％,乙酸乙酯的产率为9．77％,乙酸乙酯的选择性为18．33％。 相似文献
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同源四倍体苦荞新品系与原种主要性状的比较研究 总被引：8，自引：0，他引：8
同源四倍体苦荞新品系（４ｘ）的细胞和组织器官比原种（２ｘ）明显增大，新品系的种子蛋白质和叶片过氧化物酶同工酶的电泳图谱与原种有差异，新品系（４ｘ）的产量和品质均超过原种（２ｘ），新品系（４ｘ）富含蛋白质、氨基酸、维生素和多种矿质营养元素． 相似文献
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Haruhiro Muratsubaki Akiko Yamaki 《Indian journal of clinical biochemistry : IJCB》2011,26(4):416-419
The effect of acute hypoxic hypoxia on the profile of plasma amino acids in rats was studied and compared to that resulting
from acute liver injury induced by giving carbon tetrachloride. In hypoxic rats exposed to 45% air in N2 for 5 h, the concentrations of branched chain amino acids, including valine, leucine and isoleucine, and aromatic amino acids
such as phenylalanine and tyrosine were significantly increased as compared to those in normoxic rats. The ratio of branched-chain
to aromatic amino acids (Fischer’s ratio) was significantly decreased. The levels of arginine and citrulline, which are related
to the urea cycle, were also depressed. Furthermore, plasma proline level was reduced in hypoxic rats. The activities of plasma
marker enzymes for tissue damage remained unchanged during hypoxia, indicating that tissue injury was not induced by exposure
to hypoxic conditions. We suggest that the characteristic profile of plasma amino acids and the Fischer ratio are valuable
tools for understanding the pathology of acute hypoxia in the absence of systemic tissue damage. 相似文献
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BackgroundIn order to study the influence of long-term growth process and evolution environment on intestinal bacteria of different breeds, the intestinal bacteria and volatile fatty acids among the faeces of Min, Landrace and Yorkshire pigs were analysed by Illumina high-throughput sequencing of the 16S-rDNA and gas chromatography.ResultsThe shared core microbiota of Landrace, Yorkshire and Min pig were 1273, accounting for 69.56% of total abundance of organisms. The proportion of Firmicutes in Min pig faeces (57.89%) was significantly higher than that in Landrace and Yorkshire pig faeces (47.01% and 46.40%, respectively) (P < 0.05), but that of Bacteroidetes was exactly opposite. Moreover, Min pig presented more highly efficient membrane transport, environmental adaptation, carbohydrate transport, and metabolism than Yorkshire pig (P < 0.05). The acetic acid/total volatile fatty acid ratio in Min pig was significantly higher than that in Landrace pig (P < 0.05), and the isobutyric acid/ total volatile fatty acid ratio in Min pig was significantly larger than that in Yorkshire pig (P < 0.05). Furthermore, the content of branched chain volatile fatty acids in Min pig was significantly higher than that in Yorkshire pig (P < 0.05).ConclusionsThis study demonstrated that Min pig, as an excellent breed in the cold area of China, possessed special intestinal floral structure compared to the imported pigs in order to satisfy their physiological and metabolic demands, which may influence their characteristics such as resistance to cold, diseases, and crude feeding, and the ability to deposit intramuscular fat.How to cite: Yang Y, Sun C, Li F, et al. Characteristics of faecal bacterial flora and volatile fatty acids in Min pig, Landrace pig, and Yorkshire pig. Electron J Biotechnol 2021;53. https://doi.org/10.1016/j.ejbt.2021.05.002 相似文献
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低钾胁迫对不同基因型杂交水稻氮代谢的影响 总被引：5，自引：0，他引：5
通过在低钾胁迫下对杂交水稻耐低钾基因型威优３５及不耐低钾基因型汕优６号的比较研究,表明低钾胁迫会显著增加不耐低钾基因型植株地上部分的氮含量和叶片总游离氨基本酸含量,降低籽粒粗蛋白含量,显著影响叶片脯氨酸含量的变化;而对耐低钾基因型的影响较小。低钾胁迫还引起两基因型其它主要游离氨基酸的不同变化,籽粒产量也有明显差异,说明耐低钾基因型水稻在氮代谢方面具有特异性。 相似文献
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通过对胆囊结石病人及对照组头发中微量元素的检测,显示胆结石的主要构成元素Ca、Al、Fe及Si在病人组头发中含量显著低于对照组(P<0.05),Mn、Cu含量也比对照组低(P>0.05),仅Zn以胆结石组为高(P>0.05). 相似文献