, 2004 一种催化裂化轻汽油改性的方法：使用分子筛、强酸性阳离子交换树脂或杂多酸为催化剂，采用固定床连续反应或釜式反应方法对FCC汽油进行水合，以降低FCC汽油中烯烃的含量，同时由于水合是使汽油增重的过程，反应具有高的原子经济性 ...
刘中民, 黄韬, 王华
core
Shuitu Baochi Xuebao[目的] 综合评价北京山区不同植被恢复类型土壤质量,并进一步确定影响土壤质量的关键因素,为该地区植被恢复与重建提供数据支撑。[方法] 以立地条件相近的侧柏纯林、油松纯林、侧柏油松混交林、侧柏针阔混交林、油松针阔混交林、落叶阔叶混交林和无林地(对照)为研究对象,测定14个土壤理化指标作为土壤质量评价的总数据集(TDS),采用主成分分析法(PCA)和Pearson相关性分析建立土壤质量最小数据集(MDS),利用线性(L)和非线性(NL)2种评分方法计算土壤质量指数(SQI)和一般线性模型(GLM ...
李鹏 +10 more
doaj
[Image-guided application of plant pigment patch and laser microdot ablation for surface marking in radiotherapy for breast cancer: a randomized controlled trial]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoFang L +6 more
europepmc +1 more source
[Clinical analysis of nine cases of hemophagocytic lymphohistiocytosis during pregnancy: characteristics, therapeutic strategies, and maternal-infant outcomes]. [PDF]
Zhonghua Xue Ye Xue Za ZhiLiu YP, Miao Y, Li JY.
europepmc +1 more source
, 2014 本发明涉及一种含稀土的柴油馏分油加氢催化剂及其制备和应用；该催化剂是由稀土改性的USY分子筛、无定型硅铝、大孔氧化铝和加氢活性组分组成，其中加氢活性组分为第VIII族金属，催化剂中含稀土改性的USY分子筛5-60wt％，含无定型硅铝5-80wt％，含第VIII族金属0.1-10wt％，余量为大孔氧化铝；该催化剂具有较佳的加氢、异构和芳烃选择性开环活性，处理FCC加氢精制柴油馏分油时，在较缓和的反应条件下，能显著提高十六烷值，降低凝点，提高产品质量，并保持柴油收率95％以上 ...
田志坚 +11 more
core
[Treatment of root fracture of immature maxillary permanent central incisor combined with impacted supernumerary tooth in the apical region: a case report]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiSun J, Qian H, Wu X, Liu H, Liu Q.
europepmc +1 more source
, 2010 通过野外调查和室内分析相结合的方法,对子午岭林区辽东栎、油松、柴松3种群落的特征及其枯枝落叶层水文效应进行了研究,调查结果表明:(1)子午岭辽东栎林除局部林是与其它林木混交外,一般都是纯林;油松林和柴松林常形成以该种群为主的单优群落,但混有少量阔叶树种。(2)子午岭林区油松林物种多样性指数最大,而柴松林物种不丰富;乔木层、灌木层、草本层这3者的多样性指数呈现出由低到高的特点。(3)子午岭辽东栎林、油松林、柴松林的枯落物蓄积量分别为32.65,48.95和47.30t/hm2。(4)辽东栎、油松 ...
胡秀娟, 程积民, 万惠娥
core
[Febrile infection-related epilepsy syndrome caused by hemophagocytic lymphohistiocytosis: a case report]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiDeng XL +5 more
europepmc +1 more source
[Metabolomic alterations in preterm infants with bronchopulmonary dysplasia]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiWu YY +10 more
europepmc +1 more source
[Research progress on the pretreatment and analysis of prohibited components of glucocorticoids in cosmetics]. [PDF]
Se PuLiu L, Xiao XH, Fang JH, Li GK.
europepmc +1 more source