AIM:To evaluate the effect of hydroxyapatite nanoparticles (Nano HAP) by intravenous injection on the inhibition of implanted hepatic VX2 tumor growth in rabbit
AIM: To identify rates of occurrence, common clinical and endoscopic features, and to review the outcome of endoscopic management of Dieulafoy's lesions in the
在营养液培养条件下,以硝态氮为对照,研究了铵态氮对向日葵叶片(Helianthus annuus L cvFrankasol)质外体pH和可溶性铁的影响,探讨了铵态氮改善植物铁营养状况的作用机制.结果表明,铵态氮通过降低叶片质外体pH和提高新叶质外体可溶性铁的浓度来改善缺铁植物的铁营养状况.铵态氮处理的缺铁植株新叶质外体、细胞汁液和木质部汁液中铁的浓度显著高于硝态氮处理,新叶未出现缺铁黄化症状.新