检索结果-南通市图书馆

HYDROGENOLYSIS　OF　ARYL　HALIDES　WITH　POWDERS　OF　ALKALI　METAL　HYDRIDES　OF　NANOMETRIC　SIZE

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1995年第8期6卷 735-738页

作者： Zhang, YP liao, sj Xu, Y Yu, DR Chinese Acad Sci Dalian Inst Chem Phys Dalian 116023 Peoples R China Chinese Acad Sci Shanghai Inst Organ Chem Organomet Chem Lab Shanghai 200032 Peoples R China

Superfine powders of alkali metal hydrides of nanometric size exhibit very high reactivity in the hydrogenolysis of aryl halides.

关键词：

SYNERGIC　EFFECT　OF　POLYMER　SUPPORTED　Pd－Pt　BIMETALLIC　CATALYSTS　ON　THE　HYDROGENATION　OF　NITROAROMATICS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1996年第7期7卷 663-664页

作者： Yang, B Yu, ZK Xu, Y liao, sj Yu, DR CHINESE ACAD SCI DALIAN INST CHEM PHYSDALIAN 116023PEOPLES R CHINA

s: Hydrogenation of nitroaromatics has been carried out under mild conditions using poly-N-vinyl-2-pyrrolidone supported Pd-Pt bimetallic catalysts (PdCl2 and H2PtCl6 as catalyst precursors).The catalytic activities of the bimetallic catalysts are significantly higher than those of themonometallic Pd or Pt catalyst especially in the case of the hydrogenation of substitutednitroaromatics due to a remarkable synergic effect. The ratio of Pd to Pt in the catalyst influences theactivity of the catalyst.

关键词： Pd SUPPORTED CATALYSTS BIMETALLIC Pt

An effective method for the hydrodehalogenation of organic halides

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第11期42卷 966-967页

作者： Li, HQ liao, sj Xu, Y Yu, DR Qiao, ZM CHINESE ACAD SCI DALIAN INST CHEM PHYSDALIAN 116023PEOPLES R CHINA

THE reduction of organic halides to the corresponding hydrocarbons plays an important role inorganic synthesis and environmental *** is one of the earliest reactions de-scribed in the organic chemical literature.A number of successful approaches have been report-ed hitherto,but the hydrodehalogenation of chloroarenes and organic fluorides is still a

关键词： An effective method for the hydrodehalogenation of organic halides

CYCLOTRIMERIZATION OF NITRILES BY THE REACTIVE ALKALI METAL HYDRIDES

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1995年第10期6卷 839-842页

作者： Zhang, WM Zhang, L liao, sj Xu, Y Yu, DR Chinese Acad Sci Dalian Inst Chem Phys Dalian 116023 Peoples R China Chinese Acad Sci Shanghai Inst Organ Chem Organomet Chem Lab Shanghai 200032 Peoples R China

In the presence of reactive alkali metal hydrides, nitriles can be cyclotrimerized to give 2,4,6-trisubstituted-1,3,5-triazines and 2,4,6-trisubstituted imidazoles in moderate yield.

关键词：

PREPARATION　OF　DI－GRIGNARD　REAGENTS　MEDIATED　BY　THE　TRANSITION　METAL　CHLORIDES

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1995年第4期6卷 301-304页

作者： Zhang, L liao, sj Xu, Y Yu, DR Zhang, YP Chinese Acad Sci Dalian Inst Chem Phys Dalian 116023 Peoples R China Chinese Acad Sci Shanghai Inst Organ Chem Organomet Chem Lab Shanghai 200032 Peoples R China

In the presence of transition metal chloride and potassium iodide, di-Grignard reagents can be produced efficiently by the reactions of aryl dichlorides with active magnesium species, which are formed in situ from com... 详细信息

关键词： DI OF GRIGNARD PREPARATION CHLORIDES BY

Carbonylation　of　Allyl　Chloride　Catalyzed　by　PdCl_2（TPPTS）_2　in　Two－phase　Medium

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1996年第9期7卷 847-848页

作者： Jiang, H Xu, Y liao, sj Yu, DR Chen, H Li, XJ CHINESE ACAD SCI DALIAN INST CHEM PHYSDALIAN 116023PEOPLES R CHINA SICHUAN UNIV DEPT CHEMCHENGDU 610064PEOPLES R CHINA

PdCl2(TPPTS)2 exhibits very high catalytic activity for carbonylation of allyl chloride in aq. NaOH / toluene two-phase medium under atmospheric *** average turnover frequency (TOFav,mol substrate / mol Pd·min) reach... 详细信息

关键词： TPPTS PdCl2 Two Catalyzed phase Allyl Carbonylation

在线全文

学校读者我要写书评

暂无评论

《黄帝内经.素部》中针刺治疗腰痛

国外医学（中医中药分册） 1993年第5期15卷 31-32页

作者： liao.,sj 陈素云

《内经．素部》中有痛的内容有３篇，其中１篇专论腰痛，即“刺腰痛篇第四十一”。作者认为，传统中医诊断疾病时可包括多种症状，而西医仅从解剖学角度出发。将此两种概念进行对照，将会从中获益。

关键词：黄帝内经针刺疗法腰痛

Near-infrared brain functional characteristics of mild cognitive impairment with sleep disorders

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2025年第1期15卷 106-116页

作者： Heng liao Sha liao Yu-Jiao Gao Xi Wang Li-Hong Guo Su Zheng Wu Yang Yi-Nan Dai Sleep Psychosomatic Medicine Center Taihe Hospital of Shiyan CityAffiliated Hospital of Hubei University of MedicineShiyan 442000Hubei ProvinceChina Department of Integrated Chinese and Western Medicine Taihe Hospital of Shiyan CityAffiliated Hospital of Hubei University of MedicineShiyan 442000Hubei ProvinceChina Department of Orthopaedics Taihe Hospital of Shiyan CityAffiliated Hospital of Hubei University of MedicineShiyan 442000Hubei ProvinceChina Department of Rehabilitation Taihe Hospital of Shiyan CityAffiliated Hospital of Hubei University of MedicineShiyan 442000Hubei ProvinceChina

BACKGROUND Mild cognitive impairment(MCI)has a high risk of progression to Alzheimer’s *** disease is often accompanied by sleep disorders,and whether sleep disorders have an effect on brain function in patients with MCI is *** To explore the near-infrared brain function characteristics of MCI with sleep *** A total of 120 patients with MCI(MCI group)and 50 healthy subjects(control group)were *** subjects underwent the functional near-infrared spec-troscopy *** baseline data,Mini-Mental State Examination,Montreal Cognitive Assessment scale,fatigue severity scale(FSS)score,sleep parameter,and oxyhemoglobin(Oxy-Hb)concentration and peak time of functional near-infrared spectroscopy test during the task *** relationship between Oxy-RESULTS Compared with the control group,the FSS score of the MCI group was higher(t=11.310),and the scores of Pittsburgh sleep quality index,sleep time,sleep efficiency,nocturnal sleep disturbance,and daytime dysfunction were higher(Z=-10.518,-10.368,-9.035,-10.661,-10.088).Subjective sleep quality and total sleep time scores were lower(Z=-11.592,-9.924).The sleep efficiency of the MCI group was lower,and the awakening frequency,rem sleep latency period,total sleep time,and oxygen desaturation index were higher(t=5.969,5.829,2.887,3.003,5.937).The Oxy-Hb concentration at T0,T1,and T2 in the MCI group was lower(t=14.940,11.280,5.721),and the peak time was higher(t=18.800,13.350,9.827).In MCI patients,the concentration of Oxy-Hb during T0 was negatively correlated with the scores of Pittsburgh sleep quality index,sleep time,total sleep time,and sleep efficiency(r=-0.611,-0.388,-0.563,-0.356).It was positively correlated with sleep efficiency and total sleep time(r=0.754,0.650),and negatively correlated with oxygen desaturation index(r=-0.561)and FSS score(r=-0.526).All comparisons were P<*** Patients with MCI and sleep disorders have lower near-infrared brain function than norm

关键词： Mild Cognitive impairment Sleep disorders Near-infrared Brain functional Characteristics

Development of a nomogram for overall survival in patients with esophageal carcinoma:A prospective cohort study in China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2025年第1期17卷 158-168页

作者： Shi-Shi Yu Xi Zheng Xiao-Sheng Li Qian-Jie Xu Wei Zhang Zhong-Li liao Hai-Ke Lei Department of Gastroenterology Chongqing University Cancer HospitalChongqing 400030China Chongqing Cancer Multi-omics Big Data Application Engineering Research Center Chongqing University Cancer HospitalChongqing 400030China Department of Health Statistics School of Public HealthChongqing Medical UniversityChongqing 400016China

BACKGROUND Esophageal carcinoma(EC)presents a significant public health issue in China,with its prognosis impacted by myriad *** creation of a reliable prog-nostic model for the overall survival(OS)of EC patients promises to greatly advance the customization of treatment *** To create a more systematic and practical model that incorporates clinically significant indicators to support decision-making in clinical *** This study utilized data from a prospective longitudinal cohort of 3127 EC patients treated at Chongqing University Cancer Hospital between January 1,2018,and December 12,*** the least absolute shrinkage and selection operator regression alongside multivariate Cox regression analyses helped pinpoint pertinent variables for constructing the *** efficacy was assessed by concordance index(C-index),area under the receiver operating characteristic curve(AUC),calibration curves,and decision curve analysis(DCA).RESULTS Nine variables were determined to be significant predictors of OS in EC patients:Body mass index(BMI),Karnofsky performance status,TNM stage,surgery,radiotherapy,chemotherapy,immunotherapy,platelet-to-lymphocyte ratio,and albumin-to-globulin ratio(ALB/GLB).The model demonstrated a C-index of 0.715(95%CI:0.701-0.729)in the training cohort and 0.711(95%CI:0.689-0.732)in the validation *** the training cohort,AUCs for 1-year,3-year,and 5-year OS predictions were 0.773,0.787,and 0.750,respectively;in the validation cohort,they were 0.772,0.768,and 0.723,respectively,illustrating the model's *** curves and DCA verified the model's predictive accuracy and net *** A novel prognostic model for determining the OS of EC patients was successfully developed and validated to help clinicians in devising individualized treatment schemes for EC patients.

关键词： Esophageal carcinoma High-risk factors Prognosis Overall survival Prediction model