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使用控释氮肥能提高其利用率，减轻环境污染。（包膜型）控释尿素是近几年发展较快的控释氮肥之一。控释尿素透膜扩散速率是其控释性能的一个重要指标。研究表明，使用对二甲氨基苯甲醛为显色剂，在酸性水溶液介质中显色络合物的最大紫外吸收峰在λ=426m处，尿素浓度在7．5～210μg·mL^-1范围内，其浓度与吸光度呈线性关系。据此，建立了在此紫外波段测定水溶液中尿素的含量来实现控释尿素透膜扩散速率的测定方法，其回收率为96．1％～103．9％
周毅 +4 more
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Zhongguo shiyan zhenduanxue, 2019 1临床资料患者,男性,65岁,因烦渴、多饮25年,加重1周入院。入院前使用门冬胰岛素30注射液早30U、晚30U皮下注射,二甲双胍850毫克2/日口服,并时常于睡前应用重组甘精胰岛素注射液20U皮下注射降糖治疗,门诊以"2型糖尿病"收入院。既往史:高血压病病史9年,最高血压160/100mmHg,口服硝苯地平缓释片30mg 1/日,培哚普利片4mg1/日降血压,平时血压控制在150/90mmHg左右。2007年行结肠癌切除术,恢复良好。入院时查体:体温36.6℃,脉搏82次/分,呼吸16次/分 ...
王颖, 李忻, 尹鹏
doaj
浙江大学学报. 农业与生命科学版Non-flooding plastic film mulching cultivation (PM) for rice is a comprehensive and innovative technology that utilizes plastic film covering as the core to achieve water-saving rice production.
QI Tong(祁通) +4 more
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Shuitu Baochi Xuebao, 2017 为了寻求改善果园土壤氮素稳定供应问题的有效措施，试验以6年生烟富3/SH6/平邑甜茶为试材，利用15N同位素标记，研究FSA（撒施）、FS+BC（一半撒施一半袋控）、BCRF（袋控缓释肥）对土壤Nmin及氮素吸收、利用和损失的影响。结果表明：在苹果整个生长季BCRF处理土壤Nmin含量保持平稳，FSA处理短期内土壤Nmin含量迅速升高，然后又急剧降低。在果实成熟期植株体内氮素BCRF处理（121.64 g）高于FSA处理（79.01 g）和FS+BC处理（95.92 g ...
沙建川 +4 more
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Shuitu Baochi Xuebao, 2018 为改善江汉平原地区稻田水肥管理措施，采用田间小区试验，研究了常规淹灌（CF）和浅灌深蓄（SIDS）条件下，农民习惯施肥（FFP）、30%尿素+70%控释参混肥（30%N+70%CRF）和优化减氮施肥（OPT-N）对水稻各生育阶段稻田氮磷流失特征、养分吸收和土壤养分积累的影响。结果表明：与CF处理相比，SIDS处理田间灌溉水量、总用水量、径流量和渗漏量分别降低41.7%，18.5%，45.8%和21.9%，降雨利用率增加16.2%，TN和TP径流流失量分别降低32.6%～35.9%和36.4%～53.1%，
晏, 吴启侠, 朱建强, 张露萍
doaj
[Research advances on the targeted programmed cell death regulatory network for treatment of refractory diabetic wounds]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiZhang ZH, He WF.
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[Advances in injectable and transdermal glucose-responsive insulin delivery systems]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanLi K, Zhang X, Gu Z, Wang J.
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[Research progress in mechanisms of dietary resistant starch for regulating glucose and lipid metabolism]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLiu K, Li X, Zhang Y, Sun J, Liao W.
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[Establishment of a Noninvasive Diagnostic Model for Wilson Disease Using Metallomics and Machine Learning]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanZhou H +6 more
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[Advances in research on the mechanisms of reactive oxygen species in platelet activation and thrombosis]. [PDF]
Zhonghua Xue Ye Xue Za ZhiShen RY, Xu KL, Qiao JL, Fu P.
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