Results 81 to 90 of about 75,063 (137)

膨润土粘土矿吸附焦化废水中氨氮的研究

, 1995
研究了膨润土粘土矿对碳酸铵溶液中离子和焦化废水中氨氮的吸附。结果表明：在低液固比时，颗粒膨润土对碳酸铵溶液中离子的吸附效果优于粉状膨润土；在高液固比时。粉状膨润土的吸附效果优于颗粒膨润土 ...
夏海萍,柯家骏
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[Simultaneous determination of three tryptamines in foods by ultra performance liquid chromatography-tandem mass spectrometry coupled with hydrophilic column separation]. [PDF]

Se Pu
Liao XL, Lin Q, Mei Y, Dou HS, Xu H, He Y, Pan C, Jiang FL.   +7 more
europepmc   +1 more source

氮化钛、碳化钛、低价钛合量、二氧化钛物相分析的研究

, 1978
本工作研究了钛精矿氮化、碳化产品中钛化物的物相分析。试料中钛化物主要为氮化钛(TiN)、碳化钛(TiC)、碳氮化钛、钛的各种氧化物(TiO_2、Ti_3O_5、Ti_2O_3、TiO)、钛铁矿等。氮化钛、碳化钛的物相分析一般为两种方法:一是通过测定其中氮或碳,确定氮化钛、碳化钛的含量。二是使各种钛化物彼此分离,分别测定钛,确定其各组分含量。金属试料中钛化物的物相分析多用此法。我们采用选择性溶解法。有关氮化钛、碳化钛、各种氧化物,在一些溶剂及它们混合物中的稳定性已有介绍。但由于钛化物的状态及实验条件不同,
杜士奎, 于道成, 韩铠, 王淑珍
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[Pathophysiological mechanisms of coagulation dysfunction associated with liver disease]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Wang H, Chen X, Lu YY.
europepmc   +1 more source

[Determination of perfluorinated compounds， antibiotics and pesticides in drinking water by automated solid phase extraction with ultra-performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Liang J, Feng J, Zeng D, Zhou L, Zhong X, Li Y, Chen D.   +6 more
europepmc   +1 more source

模拟氮沉降增加对寒温带针叶林土壤CO_2排放的初期影响

, 2012
研究大气氮沉降增加情景下北方森林土壤CO2排放通量及其相关控制因子至关重要。在大兴安岭寒温带针叶林区建立了大气氮沉降模拟控制试验,利用静态箱-气相色谱法测定土壤CO2排放通量,同时测定土壤温度、水分、无机氮和可溶性碳含量等相关变量,分析寒温带针叶林土壤CO2排放特征及其主要驱动因子。结果表明:氮素输入没有显著改变森林土壤含水量,但降低了有机层土壤溶解性无机碳(DIC)含量,并增加有机层和矿质层土壤溶解性有机碳(DOC)含量。增氮短期内不影响土壤NH+4-N含量,但促进了土壤NO-3-N的累积 ...
温都如娜, 徐敏杰, 张裴雷, 周梅, 高文龙, 程淑兰, 方华军, 于贵瑞   +7 more
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[Isolation, purification and immunomodulatory activity of polysaccharide from <i>Lonicera caerulea</i> L. var. <i>edulis</i> Turcz. ex Herder]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Huang Y, Zhang X, Xiang Q, Guo H, Zheng S, Hao Y, Liao W.   +6 more
europepmc   +1 more source

The Studies of Nitrogen Fixation and Its Mechanism in Humic Acid of Soil (I)

, 2014
四年期間施以有機質及化學肥料之七種不同處理的玉米水稻輪作系統下，顯示土壤中非共生性固氮菌、溶鈣磷菌和溶鐵磷菌之菌數呈些微增加的趨勢，試驗得知水稻土壤中之非共生固氮菌菌數皆有較多於秋作玉米土壤之現象。整體而言，在各處理土壤中之非共生固氮菌菌數是以綠肥處理(加化學氮肥1/3量)及泥炭處理(加化學氮肥1/3量)最多，其次是堆肥處理(加化學氮肥1/3量) ，且發現溶鈣磷菌之菌數較多(105 CFU g-1soil) ，溶鐵磷菌菌數則呈較少數，並得知綠肥處理(加化學氮肥1/3量 ...
楊秋忠
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[Simultaneous Analysis of Microcystins, Cylindrospermopsin, Anatoxin, and Nodularin in Lake Water by Liquid Chromatography-Tandem Mass Spectrometry]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Yuan G, Luo Q, Liu G, Qin X, Liu H, Lü Z, Jiang J.   +6 more
europepmc   +1 more source

[Self-designed experiment in instrumental analysis： online solid phase extraction-high performance liquid chromatography- post column derivatization for the determination of trace pesticide residues in vegetables]. [PDF]

Se Pu
Li Y, Liu YT, Huang X, Zhou ZY, Wang ZQ, Wang J, Ding F, Nan J, Tang A.   +8 more
europepmc   +1 more source