Results 1 to 10 of about 3,016 (85)
Principal Component Analysis and Comprehensive Evaluation of Free Amino Acids of Different Peppers in Hunan(湖南常见辣椒品种游离氨基酸主成分分析及综合评价) [PDF]
Shipin kexue jishu xuebao, 2021 The free amino acids (FAAs) are involved in the synthesis of flavor compounds in peppers. The types and contents of FAAs are closely related to pepper varieties.
GE Shuai(葛帅) +8 more
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Changes of Taste Substances of Litopenaeus vannamei During Hot Air-Microwave Combined Drying(热风微波联合干燥过程中南美白对虾滋味物质变化研究) [PDF]
Shipin kexue jishu xuebao, 2021 To study the taste changes of Litopenaeus vannamei in the process of hot air-microwave combined drying (HAMD), the content of taste nucleotides and free amino acids and their changes of dry basis contents calculated by moisture content during HAMD of ...
SHEN Siyuan(沈思远) +3 more
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Journal of Diabetes, Volume 15, Issue 10, Page 900-910, October 2023., 2023 Highlights Mild acquired impaired thyroid hormone sensitivity was widespread among the general populations. Reduced thyroid hormone sensitivity was related with metabolic syndrome and its components. Impaired thyroid hormone sensitivity might affect the distribution of adipose tissue and muscle.
Fang Lv +6 more
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Gongye shui chuli, 2023 采用喷射环流反应器处理实际垃圾渗滤液，重点研究了系统的氨氮硝化性能，分别考察了游离氨（FA）和游离亚硝酸（FNA）对氨氧化菌（AOB）和亚硝态氮氧化菌（NOB）活性的影响。结果表明，AOB菌群活性在FA质量浓度<6.5 mg/L、FNA质量浓度<0.1 mg/L时不受影响；在FNA质量浓度>0.1 mg/L时受到一定抑制但仍有较大活性。NOB菌群活性在FA质量浓度<3 mg/L且FNA质量浓度<0.01 mg/L时基本不受影响；在FA质量浓度>3 mg ...
张雄军, 张保山
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Gongye shui chuli, 2010 高含氮有机废水如动物养殖场排出液、垃圾渗滤液、消化污泥脱水液等是目前较难处理的废水种类之一,生物法是目前最常用的处理方法,但还存在诸多问题。介绍了游离氨(FA)在此类废水处理中所起的主要作用,概括了利用游离氨对氨氧化菌和亚硝酸盐氧化菌的活性抑制差异性实现亚硝酸型硝化的相关研究,指出游离氨的选择性抑制作用为解决此类废水处理难题呈现出了积极的另一面。
吴永明 +4 more
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Gongye shui chuli, 2018 限时曝气条件下，采用SBR反应器处理模拟氨氮废水，通过pH控制实现了SBR系统快速亚硝化启动，并对不同pH下氨氧化过程进行了研究，考察了pH对氨氧化过程中DO变化规律、游离氨及氨氧化速率的影响。结果表明，在pH为7.59~8.12时，可实现氨氧化菌和亚硝态氮快速富集和积累，亚硝态氮积累率可达95%以上；通过pH调节可控制进水游离氨（FA）浓度及氨氧化过程中DO需求，进而影响选择性亚硝化过程。
钱光磊 +5 more
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Gongye shui chuli, 2012 针对垃圾渗滤液的特殊水质特点,研究了游离氨(FA)与游离亚硝酸(FNA)对A/O工艺短程硝化反硝化处理垃圾渗滤液脱氮效果的影响。试验结果表明,当初始氨氮平均增大到300 mg/L时,系统可实现稳定的短程硝化反硝化,亚硝态氮积累率达到60.79%,并随着初始氨氮浓度的增加进一步提高,系统对氨氮的去除率始终维持在80%以上。初始氨氮浓度对系统硝化类型有极大影响,FA与FNA的交替抑制作用是系统启动并维持稳定短程硝化过程的关键。
傅金祥, 汪洋, 杨勇
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Distribution and Taste Characteristics of Free Amino Acid Enantiomers in Green Teas and Black Teas(绿茶及红茶中游离氨基酸对映异构体的分布特征及呈味特性) [PDF]
Shipin kexue jishu xuebaoMost free amino acids in teas have enantiomers with different odor characteristics and threshold values. Identifying the distribution characteristics of free amino acid enantiomers in green teas and black teas and their detailed contribution on the ...
LI Weixuan(李玮轩) +6 more
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Gongye shui chuli, 2015 采用硼掺杂金刚石(BDD)膜电极对氨氮废水进行处理,重点探讨了氨氮的氧化机理。结果表明:碱性条件下,氨氮在BDD电极上可直接氧化,其氧化率达6%。在氯离子存在条件下,氨氮氧化以间接氧化为主,氨氮去除率可达到87%,其中直接氧化率为8%,间接氧化率为79%,且在氧化过程中活性游离氯更易与氨氮发生反应,转化为N2或硝酸盐,而不是转化为氯酸盐或有害的高氯酸盐。
王春荣 +4 more
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Removal of copper ions in polluted waters by DTC heavy metal chelator(DTC类重金属捕集剂对Cu2+去除的实验研究)
Zhejiang Daxue xuebao. Lixue ban, 2014 以乙二胺、氢氧化钠、二硫化碳等为原料，在常温下合成一种橘红色的液体产品DTC-E，经测定，其主要有效成分为二硫代氨基甲酸盐(DTC类).以模拟含铜废水为处理对象，系统考察了反应体系各因素对DTC-E捕集去除游离态Cu2+效果的影响，并将其应用于实际电镀含铜废水的处理以进行验证.研究结果表明，DTC-E对反应体系的pH值适用范围(4~12)较广；最佳反应pH值和DTC-E投加量分别为8.0和1.0倍化学计量比(DTC ：Cu2+);絮凝剂的存在能够显著增强DTC-E对游离Cu2+的捕集去除效果；相比之下 ...
LIQingfeng(李清峰) +2 more
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