Results 101 to 110 of about 655,035 (161)

[Recent advances in application of venous superdrainage in perforator flaps]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
He A, Ba L, Wei Z.
europepmc   +1 more source

[Determination of 16 organic ultraviolet absorbers in drinking water by solid phase extraction-ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Wang Z, Zhao C, Ye BX, Chen YY.
europepmc   +1 more source

Effect of weed and nitrogen application on grain yield of summer maize and nitrogen use in semi-moist field

, 2008
以土垫旱耕人为土为供试土壤,采用大田试验,研究了半湿润农田两种杂草处理方式下(成熟后期清除杂草-A区和苗期开始清除杂草-B区),不同施氮量对夏玉米产量及氮素利用效率的影响。结果表明,当施氮量为0、45、90、1351、80 kg/hm2时,B区玉米子粒产量比A区分别增加了8.7%、12.1%、9.4%、5.0%和12.5%;吸氮量分别增加了1.5、2.9、4.85、.2和4.3 kg/hm2。A区和B区全生育期0—100 cm土层矿质氮(Nmin)累积量变化趋势基本一致,但B区比A区变幅较大。
李世清, 李生秀, 范亚宁
core  

[Pathogenic mechanisms and advances in the diagnosis and treatment of co-occurring psychiatric and psychological symptoms in patients with liver cirrhosis]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Gong H, Li YR, Zhang FN, Zhao TT, Huang M, Liu CC, He N.   +6 more
europepmc   +1 more source

[Case-based teaching with both positive and negative examples in undergraduate analytical chemistry laboratory： determination of six nitrogen-containing pesticides in environmental samples by solid-phase microextraction-high performance liquid chromatography]. [PDF]

Se Pu
Zhang J, Zhang XZ, Zhang Z, Liu JW, Wang XM.   +4 more
europepmc   +1 more source

秸秆还田配施氮肥对夏玉米灌浆过程和产量的影响

, 2004
针对京郊"冬小麦-夏玉米"种植制度下秸秆还田十分普遍,然而氮肥施用却常常过量这一现状,探讨了秸秆还田配施氮肥对夏玉米灌浆过程和最终产量的影响。试验设秸秆还田和秸秆不还田2个因素,不施氮、传统施氮和优化施氮3个氮肥水平。结果表明:秸秆还田配施氮肥,夏玉米的籽粒体积增加了17.38%～19.69%,高速灌浆持续期较对照延长5～7d,夏玉米产量提高显著,尤其是秸秆还田+优化施氮处理产量最高,达到7385.1kg/hm2;秸秆还田优化施氮的穗粒数达到598.19粒/穗,与秸秆不还田不施氮处理相比增加了27.3%,
邵明安, 王璞, 霍竹
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[Medical treatment standards for emergency burn wounded (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
National Health Commission Of The People's Republic Of China.
europepmc   +1 more source

固氮蓝藻的大量培养方法

, 1959
<正> 固氮蓝藻能够利用空气中的游离氮素,合成氮素化合物,不断的释放出来,死亡分解之后,更可以释放出大量氮素化合物,作为其它植物的氮肥。过去国外的一些试验证明可以利用固氮蓝藻作为水稻的氮肥肥源;我们在1958年进行的固氮蓝藻对盆栽水稻的肥效试验和与湖北省农业科学研究所协作的田间施用固氮蓝藻水生686号和水生678号作为水稻追肥试验的结果,也证明固氮蓝藻可作为水稻田的氮肥新肥源。在我们的试验中,每亩稻田接入的固氮蓝藻数量是滤去培养液后的湿重5市斤,因此 ...
石钰洁, 黎尚豪, 叶清泉, 崔希羣, 刘富端, 李万洲, 曾继绵, 王立美   +7 more
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[Experimental teaching design of instrument analysis for undergraduate study： detection of bifenthrin pesticide residues in tea by response surface methodology-optimized QuEChERS combined with gas chromatography-mass spectrometry]. [PDF]

Se Pu
Gu CX.
europepmc   +1 more source

[Guangdong consensus on integrated Chinese and Western medicine management of prolonged disorders of consciousness]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Neurocritical Care Committee of Guangdong Provincial Association of Chinese Medicine.
europepmc   +1 more source