, 1983 蓝藻的固氮和光合作用密切联系,为了解固氮蓝藻在田间固氮活力的变化,我们对田间的蓝藻在不同生境下的固氮活力和昼夜变化进行现场(in situ)测定发现: 1.在不同生境中生长的各种固氮蓝藻的固氮活力的昼夜变化节律不尽相同,一般为一天出现一个活力高峰,在薄膜复盖培养池中高峰出现在中午(13∶00),而露田则在9∶00—12∶00之间;个别还出现两峰现象。2.不同种类的固氮蓝藻在田间的固氮活力有明显差别,混合藻种的酶活力最高,类颤鱼腥藻次之。3.不同生长期的类颤鱼腥藻的酶活力有明显不同 ...
崔希羣,王乾麟,黎尚豪
core
[Determination of 16 organic ultraviolet absorbers in drinking water by solid phase extraction-ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuWang Z, Zhao C, Ye BX, Chen YY.
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, 2009 研究了南疆不同水氮处理对棉花N,P,K的吸收分配状况的影响。结果表明:大田水氮管理中前期(蕾期—花期)养分吸收受到一定的抑制作用,吸收量及净吸收率减小,之后与其他施氮处理之间无显著差异,优化施氮处理与常规施氮处理之间养分吸收差异均不显著。随着生育进程,养分分配由营养器官逐渐转向生殖器官,施氮处理中养分分配差异均不显著。优化施氮处理明显降低了施氮量,但产量和养分摄取量基本不受影响,施氮处理中每100Kg皮棉所吸收的N:P2O5:K2O的范围是1:0.32~0.33:1.10~1 ...
王平, 周永萍, 田长彦
core
[Using activity-based protein profiling method to explore the antitumor targets of spiramycin derivatives]. [PDF]
Se PuYang RY, Feng TZ, Pei SJ, Qi H, Piao HL.
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大气氨营养对不同氮效率小麦和玉米基因型根冠特征及氮利用效率的影响
, 2008 大气NH3浓度变化对植物影响是当前国内外研究的热点问题之一，这一研究在国外开展较早，且主要集中在大气NH3浓度较高的欧洲，研究对象也以森林和草原植物单叶为主，很少涉及植株和群体，对人为投入氮肥的农田生态系统作物研究更少。国内在近几年才逐步开展该领域的研究工作，资料相对贫乏，因此，以前获得的结果对各类植物是否具有普遍性，需进一步确证。本研究采用开顶式气室（Open Top Chambers，OTCs），以不同氮效率玉米（氮高效5号，NE5；氮低效四单19，SD19）和冬小麦（氮高效基因型小偃6号，XY6；
陈小莉
core
[How I treat pediatric febrile infection-related epilepsy syndrome]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiDeng XL, Peng J.
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[Prediction and <i>in vitro</i> validation of potential indications for ginkgolide B based on network pharmacology strategies]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanZhang H, Fan Q, Zhang Y, Liu M, Cui G.
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[Establishment of an gastric dysfunction and depression comorbidity model simulating clinical etiology in mice using a combined stress protocol]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoHuang Q +7 more
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[Dietary secoisolariciresinol diglucoside alleviates chronic kidney disease in offspring rats caused by maternal trans-fatty acid exposure by regulating the Bcl-2/Bax/caspase-3 signaling axis]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoMa S, Chen M, Wu T, Zhao W.
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[Hereditary erythrocytosis caused by a novel EGLN1 gene mutation: a case report]. [PDF]
Zhonghua Xue Ye Xue Za ZhiZhang QG +5 more
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