Results 81 to 90 of about 73,894 (123)

Applicatoin of chitosan-based hydrogel in oral tissue engineering. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban, 2023
Wang Y   +5 more
europepmc   +1 more source

耐盐冬小麦品种-石冬五号

open access: yes, 2003
该品种属耐盐品种,能在含盐1.0%-1.5%的氯化物-硫酸盐土壤上正常生长(出苗率达50%-100%),配一定比例的二铵及尿素,单产350千克,肥力较高土壤上达400千克以上,在北疆比一般小麦早熟10天左右,避免了干热风和小麦叶锈病的危害。该品种适于盐碱较重的中低产田、新开垦荒地及收复弃耕盐碱地种植,具有耐盐、抗旱、耐脊薄、适晚播到覆雪封雪冻前,是玉米 ...

core  

两性离子型杀菌剂的制备及其机理研究

open access: yesGongye shui chuli
针对油田采出水中长期使用同类杀菌剂易产生耐药性的问题,以二烯丙基硫代亚磺酸酯、环氧氯丙烷、N,N-二甲基-乙胺等为原料,采用“一锅法”合成了一种新型两性离子型杀菌剂(SS)。通过红外光谱、核磁共振氢谱对产物结构进行了表征。考察了催化剂种类对转化率的影响,并与市售油田用的季铵盐杀菌剂(XX84)进行了杀菌性能对比。结果表明:以四丁基溴化铵为催化剂时,转化率达90.2%;当药剂投加量为50 mg/L时,SS在不同pH(5.51~9.35)的油田采出水中对SRB、FB、TGB的杀菌率均达100 ...
谈斯如, 亓树成
doaj   +2 more sources

[Association between airborne particulate matter(PM 2.5) concentration and the incidence of allergic rhinitis in Shanghai]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2023
Sun N   +12 more
europepmc   +1 more source

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