目的:比较阿柏西普玻璃体内注射联合曲安奈德后部眼球筋膜下注射治疗抗血管内皮生长因子(VEGF)药物雷珠单抗应答不良的湿性年龄相关性黄斑变性(ARMD)的效果及安全性。方法:回顾性队列研究。2018-06/2020-05对抗VEGF药物雷珠单抗治疗应...目的:比较阿柏西普玻璃体内注射联合曲安奈德后部眼球筋膜下注射治疗抗血管内皮生长因子(VEGF)药物雷珠单抗应答不良的湿性年龄相关性黄斑变性(ARMD)的效果及安全性。方法:回顾性队列研究。2018-06/2020-05对抗VEGF药物雷珠单抗治疗应答不良的难治性ARMD 60例60眼,随机分为阿柏西普对照组及曲安奈德联合阿柏西普观察组,每组30例30眼。两组患者每月1次分别行单纯阿柏西普玻璃体内注射或阿柏西普玻璃内注射联合曲安奈德后部眼球筋膜下注射,连续注射3次。分别于注射前和注射第3次后1、3、6mo进行复查视力(BCVA)、黄斑中心凹厚度(CMT)及眼压的改变。结果:两组患者在治疗后1、3、6mo的BCVA及CMT均明显好转(P<0.05)。观察组治疗后1mo平均眼压较前升高,但仍在正常范围,两组眼压比较有差异(17.50±4.60 vs 18.30±3.73mmHg,P<0.05)。结论:曲安奈德后部眼球筋膜下注射联合阿柏西普玻璃体内注射治疗湿性ARMD,有效地减轻黄斑区水肿并改善视力,更加安全可靠。展开更多
Pyrolytic graphite (PG) with highly aligned graphene layers,present anisotropic electrical and thermal transport behavior,which is attractive in electronic,electrocatalyst and energy storage.Such pristine PG could mee...Pyrolytic graphite (PG) with highly aligned graphene layers,present anisotropic electrical and thermal transport behavior,which is attractive in electronic,electrocatalyst and energy storage.Such pristine PG could meeting the limit of electrical conductivity (~2.5×10^(4) S·cm^(−1)),although efforts have been made for achieving high-purity sp^(2) hybridized carbon.For manipulating the electrical conductivity of PG,a facile and efficient electrochemical strategy is demonstrated to enhance electrical transport ability via reversible intercalation/de-intercalation of AlCl_(4)^(-)into the graphitic interlayers.With the stage evolution at different voltages,variable electrical and thermal transport behaviors could be achieved via controlling AlCl_(4)^(-)concentrations in the PG because of substantial variation in the electronic density of states.Such evolution leads to decoupled electrical and thermal transport (opposite variation trend) in the in-plane and out-of-plane directions,and the in-plane electrical conductivity of the pristine PG (1.25×10^(4) S·cm^(−1)) could be massively promoted to 4.09×10^(4) S·cm(AlCl_(4)^(-)intercalated PG),much better than the pristine bulk graphitic papers used for the electrical transport and electromagnetic shielding.The fundamental mechanism of decoupled transport feature and electrochemical strategy here could be extended into other anisotropic conductive bulks for achieving unusual behaviors.展开更多
Roux-en-Y gastric bypass surgery（RYGB） has been demonstrated to be successful for treating type-II diabetes2mellitus（T2DM） patients with a body mass index（BMI）,30 kg/m,but reports of RYGB for T2 DM patients with...Roux-en-Y gastric bypass surgery（RYGB） has been demonstrated to be successful for treating type-II diabetes2mellitus（T2DM） patients with a body mass index（BMI）,30 kg/m,but reports of RYGB for T2 DM patients with22 a BMI,28 kg/mare lacking.T2 DM patients with a BMI,28 kg/mwere prospectively recruited to participate in this study in four hospitals.The endpoint was T2 DM remission（defined by fasting blood glucose（FBG） level,110 mg/d L and hemoglobin（Hb）A1c level,6.0% at 12 months postoperatively）.Predictors of remission were investigated by univariate and multivariate analyses.Eighty-six patients were assessed.Eighty-five patients underwent RYGB,with one conversion to open surgery.We compared the values of various variables before and after2 surgery.The mean BMI decreased from 24.68±2.12 to 21.72±2.43 kg/m（P,0.001）.Fifty-eight（67.4%） patients were not treated by drugs or insulin after surgery,and 20 patients（23.3%） had complete remission of T2 DM at12 months after surgery with an acceptable number of complications.The mean Hb A1 c level in the remission group was significantly lower than that in the non-remission group.Patients with a higher weight,lower Hb A1 c level,higher C-peptide level,and higher FBG level were more likely to have T2 DM remission in multivariate2 analyses.In conclusion,RYGB was effective and safe for treating T2 DM patients with a BMI,28 kg/m.Complete remission can be predicted by cases having a higher weight,lower Hb A1 c level,higher C-peptide level,and higher FBG level.展开更多
This paper studies the problem of designing adaptive fault-tolerant controllers for linear tirne-invariant systems with actuator saturation. New methods for designing indirect adaptive fault-tolerant controllers via s...This paper studies the problem of designing adaptive fault-tolerant controllers for linear tirne-invariant systems with actuator saturation. New methods for designing indirect adaptive fault-tolerant controllers via state feedback are presented for actuator fault compensations. Based on the on-line estimation of eventual faults, the adaptive fault-tolerant controller parameters are updating automatically to compensate the fault effects on systems. The designs are developed in the framework of linear matrix inequality （LMI） approach, which can enlarge the domain of attraction of closed-loop systems in the cases of actuator saturation and actuator failures. Two examples are given to illustrate the effectiveness of the design method.展开更多
This paper studies the robust stabilization problem of switched discrete-time linear systems subject to actuator saturation. New switched saturation-dependent Lyapunov functions are exploited to design a robust stabil...This paper studies the robust stabilization problem of switched discrete-time linear systems subject to actuator saturation. New switched saturation-dependent Lyapunov functions are exploited to design a robust stabilizing state feedback controller that maximizes an estimation of the domain of attraction. The design problem of controller （coefficient matrices） is then reduced to an optimization problem with linear matrix inequality （LMI） constraints. A numerical example is given to show the effectiveness of the proposed method.展开更多
Organic solar cell(OSC)has attracted great interests due to its potential applications[1-9].To date,18%power conversion efficiency(PCE)has been achieved in single-junction OSC[10−13],indicating the feasibility of comm...Organic solar cell(OSC)has attracted great interests due to its potential applications[1-9].To date,18%power conversion efficiency(PCE)has been achieved in single-junction OSC[10−13],indicating the feasibility of commercialization.This photovoltaic technology currently faces the performance gap between laboratory cells and large-area modules.展开更多
Objectives To explore whether the angiotensin Ι-converting enzyme(ACE) I/D(insertion/deletion) polymorphism is associated with the susceptibility to high altitude pulmonary edema(HAPE) in the Han Chinese. Methods One...Objectives To explore whether the angiotensin Ι-converting enzyme(ACE) I/D(insertion/deletion) polymorphism is associated with the susceptibility to high altitude pulmonary edema(HAPE) in the Han Chinese. Methods One hundred and forty-seven HAPE-p(HAPE patients) and 193 HAPE-r(HAPE resistants) were enrolled from the Yushu earthquake reconstruction workers in Qinghai province where the altitude is over 3 500 m above sea level. Blood samples were collected from each of the HAPE-p and HAPE-r groups. Information about physiological phenotypes was obtained via fieldwork investigation. The ACE-I/D polymorphism in HAPE-p and HAPE-r was detected by polymerase chain reaction(PCR). Results The SaO2 was significantly lower while HR was significant1y higher in HAPE-p group than those in HAPE-r group. The genotype frequencies of ACE-I/D for II, ID, DD in HAPE-r and HAPE-p groups were 0.430, 0.446, 0.124 and 0.435, 0.469, 0.095, respectively, the allelic frequencies of I and D were 0.650, 0.350 and 0.670, 0.330, respectively. The OR of ID, DD and D alleles relative to II for HAPE was 0.961(0.610~1.514), 1.322(0.634~2.758) and 1.080(0.783~1.489). There was no significant difference of the genotypic and the allelic frequencies in ACE-I/D polymorphism between HAPE-p and HAPE-r groups. Conclusions There is no relation between ACE-I/D polymorphism and HAPE in the Han Chinese.展开更多
This paper studies the problem of designing adaptive fault-tolerant H-infinity controllers for linear timeinvariant systems with actuator saturation. The disturbance tolerance ability of the closed-loop system is meas...This paper studies the problem of designing adaptive fault-tolerant H-infinity controllers for linear timeinvariant systems with actuator saturation. The disturbance tolerance ability of the closed-loop system is measured by an optimal index. The notion of an adaptive H-infinity performance index is proposed to describe the disturbance attenuation performances of closed-loop systems. New methods for designing indirect adaptive fault-tolerant controllers via state feedback are presented for actuator fault compensations. Based on the on-line estimation of eventual faults, the adaptive fault-tolerant controller parameters are updated automatically to compensate for the fault effects on systems. The designs are developed in the framework of the linear matrix inequality （LMI） approach, which can guarantee the disturbance tolerance ability and adaptive H-infinity performances of closed-loop systems in the cases of actuator saturation and actuator failures. An example is given to illustrate the efficiency of the design method.展开更多
Objective:The fruit stalk of Schisandra chinensis(Turcz.)Baill.(S.chinensis)has been found to contain bioactive components similar to the fruit of S.chinensis.Here,we report a recent discovery about new nortriterpenoi...Objective:The fruit stalk of Schisandra chinensis(Turcz.)Baill.(S.chinensis)has been found to contain bioactive components similar to the fruit of S.chinensis.Here,we report a recent discovery about new nortriterpenoids with a novel skeleton and anti-gastric cancer activity,which were isolated from the fruit stalk of S.chinensis.Methods:The chemical components of ethyl acetate extract from 70%ethanol extract from S.chinensis fruit stalk were separated,purified,and identified by liquid chromatography methods(silica gel,ODS,HPLC)and extensive spectroscopic analyses(NMR,IR,UV,MS,CD).Results:Two new nortriterpenoids,schilancitrilactone M and 25-hydroxyl schindilactone D(1 and 2),along with ten known nortriterpenoids(3-12)were isolated from the fruit stalk of S.chinensis.The isolated compounds were tested for their cytotoxic activities against MGC-803 cells,and the results showed that compounds 6-8 possessed significant activities with IC50 of 9.01,11.77,and 2.74μmol/L,respectively.Conclusion:Twelve nortriterpenoids including two new compounds were isolated from the fruit stalk of S.chinensis for the first time.Among them,compounds 6-8 showed significant anti-gastric cancer activities.We postulated that the fruit stalk of S.chinensis could be used as an anti-gastric cancer drug.展开更多
The crystal structure of the ternary complex [Cu (L)(2, 2'-bipy)H2 O]·2H2O(L=phenylmalonate) has been determined by X-ray diffraction methods. The copperf(II) centerin five-coordinate Square-pyramidal structu...The crystal structure of the ternary complex [Cu (L)(2, 2'-bipy)H2 O]·2H2O(L=phenylmalonate) has been determined by X-ray diffraction methods. The copperf(II) centerin five-coordinate Square-pyramidal structure.It is of interest in this structure that the complexinvolves a metal ion bridge ligand-ligand aromatic ring stacking interaction展开更多
Coordination polymer {[Cu（NPPCA）3（NO3）（H20）]-NOyH20}n 1 （ NPPCA = N-（4＇- nitrophenyl）-4-pyridinecarboxamide） has been synthesized by the reaction of NPPCA with copper（H） nitrate in ethanol-water solution ...Coordination polymer {[Cu（NPPCA）3（NO3）（H20）]-NOyH20}n 1 （ NPPCA = N-（4＇- nitrophenyl）-4-pyridinecarboxamide） has been synthesized by the reaction of NPPCA with copper（H） nitrate in ethanol-water solution and characterized by X-ray diffraction. 1 crystallizes in the monoclinic space, group P21/n, a = 17.341（6）A, b = 6.744（2）A, c = 34.555（12）A, β = 100.493（6）°, V = 3974（2） A^3, Z = 4. Each copper（H） ion has a distorted octahedral coordination geometry. Nitrate anion adopts the unusual coordination mode linking two adjacent copper（H） ions to form a one-dimensional coordination polymer and these chains are further linked by noncovalent interactions.展开更多
Objective:To evaluate the efficiency,safety and clinical outcomes of Retziussparing robot-assisted radical prostatectomy(RS-RARP)in comparison with the standard RARP.Methods:A systematic search from Web of Science,Pub...Objective:To evaluate the efficiency,safety and clinical outcomes of Retziussparing robot-assisted radical prostatectomy(RS-RARP)in comparison with the standard RARP.Methods:A systematic search from Web of Science,PubMed,EMBase,Cochrane Library and Google Scholar was performed using the terms“Retzius-sparing”,“Bocciardi approach”and“robot-assisted radical prostatectomy”.Video articles and abstract papers for academic conferences were excluded.Meta-analysis of interested outcomes such as positive surgical margins(PSMs)and continence recovery was undertaken.A comprehensive literature review of all studies regarding Retzius-sparing(RS)approach was conducted and summarized.Results:From 2010 to 2017,11 original articles about RS-RARP approach were retrieved.Of that,only four studies comparing the RS-RARP approach to the conventional RARP were comparable for meta-analysis.Faster overall continence recovery within 1 month after the surgery was noted in the RS group(61%vs.43%;pZ0.004).PSMs of pT2 and pT3 stages were not significantly different between the groups(10.0%vs.7.4%;p Z 0.39 and 13.1%vs.9.5%,p Z 0.56,respectively).Of all the studies,only one reported sexual recovery outcomes after RS treatment in which 40%of the participants achieved sexual intercourse within the first month.Conclusion:Though more technically demanding than the conventional RARP,the RS technique is a safe and feasible approach.This meta-analysis and literature review indicates that RS technique,as opposed to the conventional approach,is associated with a faster continence recovery while PSMs were comparable between the two groups.The limitations of observational studies and the small data in our meta-analysis may prevent an ultimate conclusion.Future well-designed RCTs are needed to validate and confirm our findings.展开更多
文摘目的:比较阿柏西普玻璃体内注射联合曲安奈德后部眼球筋膜下注射治疗抗血管内皮生长因子(VEGF)药物雷珠单抗应答不良的湿性年龄相关性黄斑变性(ARMD)的效果及安全性。方法:回顾性队列研究。2018-06/2020-05对抗VEGF药物雷珠单抗治疗应答不良的难治性ARMD 60例60眼,随机分为阿柏西普对照组及曲安奈德联合阿柏西普观察组,每组30例30眼。两组患者每月1次分别行单纯阿柏西普玻璃体内注射或阿柏西普玻璃内注射联合曲安奈德后部眼球筋膜下注射,连续注射3次。分别于注射前和注射第3次后1、3、6mo进行复查视力(BCVA)、黄斑中心凹厚度(CMT)及眼压的改变。结果:两组患者在治疗后1、3、6mo的BCVA及CMT均明显好转(P<0.05)。观察组治疗后1mo平均眼压较前升高,但仍在正常范围,两组眼压比较有差异(17.50±4.60 vs 18.30±3.73mmHg,P<0.05)。结论:曲安奈德后部眼球筋膜下注射联合阿柏西普玻璃体内注射治疗湿性ARMD,有效地减轻黄斑区水肿并改善视力,更加安全可靠。
基金financially supported by the National Key R&D Program of China (No. 2018YFB0104400)the National Natural Science Foundation of China (Nos. 52074036, 51725401, and 51874019)Beijing Municipal Science and Technology Commission (No. Z191100002719007)
文摘Pyrolytic graphite (PG) with highly aligned graphene layers,present anisotropic electrical and thermal transport behavior,which is attractive in electronic,electrocatalyst and energy storage.Such pristine PG could meeting the limit of electrical conductivity (~2.5×10^(4) S·cm^(−1)),although efforts have been made for achieving high-purity sp^(2) hybridized carbon.For manipulating the electrical conductivity of PG,a facile and efficient electrochemical strategy is demonstrated to enhance electrical transport ability via reversible intercalation/de-intercalation of AlCl_(4)^(-)into the graphitic interlayers.With the stage evolution at different voltages,variable electrical and thermal transport behaviors could be achieved via controlling AlCl_(4)^(-)concentrations in the PG because of substantial variation in the electronic density of states.Such evolution leads to decoupled electrical and thermal transport (opposite variation trend) in the in-plane and out-of-plane directions,and the in-plane electrical conductivity of the pristine PG (1.25×10^(4) S·cm^(−1)) could be massively promoted to 4.09×10^(4) S·cm(AlCl_(4)^(-)intercalated PG),much better than the pristine bulk graphitic papers used for the electrical transport and electromagnetic shielding.The fundamental mechanism of decoupled transport feature and electrochemical strategy here could be extended into other anisotropic conductive bulks for achieving unusual behaviors.
文摘Roux-en-Y gastric bypass surgery（RYGB） has been demonstrated to be successful for treating type-II diabetes2mellitus（T2DM） patients with a body mass index（BMI）,30 kg/m,but reports of RYGB for T2 DM patients with22 a BMI,28 kg/mare lacking.T2 DM patients with a BMI,28 kg/mwere prospectively recruited to participate in this study in four hospitals.The endpoint was T2 DM remission（defined by fasting blood glucose（FBG） level,110 mg/d L and hemoglobin（Hb）A1c level,6.0% at 12 months postoperatively）.Predictors of remission were investigated by univariate and multivariate analyses.Eighty-six patients were assessed.Eighty-five patients underwent RYGB,with one conversion to open surgery.We compared the values of various variables before and after2 surgery.The mean BMI decreased from 24.68±2.12 to 21.72±2.43 kg/m（P,0.001）.Fifty-eight（67.4%） patients were not treated by drugs or insulin after surgery,and 20 patients（23.3%） had complete remission of T2 DM at12 months after surgery with an acceptable number of complications.The mean Hb A1 c level in the remission group was significantly lower than that in the non-remission group.Patients with a higher weight,lower Hb A1 c level,higher C-peptide level,and higher FBG level were more likely to have T2 DM remission in multivariate2 analyses.In conclusion,RYGB was effective and safe for treating T2 DM patients with a BMI,28 kg/m.Complete remission can be predicted by cases having a higher weight,lower Hb A1 c level,higher C-peptide level,and higher FBG level.
基金supported by Program for New Century Excellent Talents in University (NCET-04-0283)the Funds for Creative Research Groups of China (No.60521003)+4 种基金Program for Changjiang Scholars and Innovative Research Team in University (No.IRT0421)the State Key Program of National Natural Science of China (No.60534010)the Funds of National Science of China (No.60674021)the Funds of PhD program of MOE,China (No.20060145019)the 111 Project (B08015)
文摘This paper studies the problem of designing adaptive fault-tolerant controllers for linear tirne-invariant systems with actuator saturation. New methods for designing indirect adaptive fault-tolerant controllers via state feedback are presented for actuator fault compensations. Based on the on-line estimation of eventual faults, the adaptive fault-tolerant controller parameters are updating automatically to compensate the fault effects on systems. The designs are developed in the framework of linear matrix inequality （LMI） approach, which can enlarge the domain of attraction of closed-loop systems in the cases of actuator saturation and actuator failures. Two examples are given to illustrate the effectiveness of the design method.
基金supported by Program for New Century Excellent Talents in University (NCET-04-0283)the Funds for Creative Research Groups of China (No.60521003)+4 种基金Program for Changjiang Scholars and Innovative Research Team in University (No.IRT0421)the State Key Program of National Natural Science of China (No.60534010)the Funds of National Science of China (No.60674021)the Funds of PhD program of MOE,China (No.20060145019)the 111 Project (B08015)
文摘This paper studies the robust stabilization problem of switched discrete-time linear systems subject to actuator saturation. New switched saturation-dependent Lyapunov functions are exploited to design a robust stabilizing state feedback controller that maximizes an estimation of the domain of attraction. The design problem of controller （coefficient matrices） is then reduced to an optimization problem with linear matrix inequality （LMI） constraints. A numerical example is given to show the effectiveness of the proposed method.
基金The authors thank National Natural Science Foundation of China(61774077,61804065,51673070,51521002,21704082,21875182,21534003,61705090 and 51320105014)National Key Research and Development Program of China(2016YFA0200700)+6 种基金China Postdoctoral Science Foundation(2017M623162),111 Project 2.0(BP2018008)the Basic and Applied Basic Research Fund of Guangdong Province(2019B1515120073)the Research and Development Program in Key Areas of Guangdong Province(2019B090921002 and 2019B010132004)the Fundamental Research Funds for the Central Universities(21618308)the State Key Laboratory of Luminescent Materials and Devices(2019-skllmd-05)the Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials Open Fund(KFVE20200006)for financial support.L.Ding thanks the National Key Research and Development Program of China(2017YFA0206600)the National Natural Science Foundation of China(51773045,21772030,51922032,and 21961160720)for financial support.
文摘Organic solar cell(OSC)has attracted great interests due to its potential applications[1-9].To date,18%power conversion efficiency(PCE)has been achieved in single-junction OSC[10−13],indicating the feasibility of commercialization.This photovoltaic technology currently faces the performance gap between laboratory cells and large-area modules.
基金supported by research grants including National Science Foundation of China(31160232)National Basic Research Program of China(2012CB518200)+1 种基金Program of International S&T Cooperation of China(2011DFA32720)Natural Science Foundation of Qinghai(2011-Z-919Q)
文摘Objectives To explore whether the angiotensin Ι-converting enzyme(ACE) I/D(insertion/deletion) polymorphism is associated with the susceptibility to high altitude pulmonary edema(HAPE) in the Han Chinese. Methods One hundred and forty-seven HAPE-p(HAPE patients) and 193 HAPE-r(HAPE resistants) were enrolled from the Yushu earthquake reconstruction workers in Qinghai province where the altitude is over 3 500 m above sea level. Blood samples were collected from each of the HAPE-p and HAPE-r groups. Information about physiological phenotypes was obtained via fieldwork investigation. The ACE-I/D polymorphism in HAPE-p and HAPE-r was detected by polymerase chain reaction(PCR). Results The SaO2 was significantly lower while HR was significant1y higher in HAPE-p group than those in HAPE-r group. The genotype frequencies of ACE-I/D for II, ID, DD in HAPE-r and HAPE-p groups were 0.430, 0.446, 0.124 and 0.435, 0.469, 0.095, respectively, the allelic frequencies of I and D were 0.650, 0.350 and 0.670, 0.330, respectively. The OR of ID, DD and D alleles relative to II for HAPE was 0.961(0.610~1.514), 1.322(0.634~2.758) and 1.080(0.783~1.489). There was no significant difference of the genotypic and the allelic frequencies in ACE-I/D polymorphism between HAPE-p and HAPE-r groups. Conclusions There is no relation between ACE-I/D polymorphism and HAPE in the Han Chinese.
基金partly supported by Program for New Century Excellent Talents in University (No.NCET-04-0283)the Funds for Creative Research Groups of China (No.60521003)+4 种基金Program for Changjiang Scholars and Innovative Research Team in University (No.IRT0421)the State Key Program of National Natural Science of China (No.60534010)the Funds of National Science of China (No.60674021)the Funds of PhD program of MOE,China (No.20060145019)the 111 Project (No.B08015)
文摘This paper studies the problem of designing adaptive fault-tolerant H-infinity controllers for linear timeinvariant systems with actuator saturation. The disturbance tolerance ability of the closed-loop system is measured by an optimal index. The notion of an adaptive H-infinity performance index is proposed to describe the disturbance attenuation performances of closed-loop systems. New methods for designing indirect adaptive fault-tolerant controllers via state feedback are presented for actuator fault compensations. Based on the on-line estimation of eventual faults, the adaptive fault-tolerant controller parameters are updated automatically to compensate for the fault effects on systems. The designs are developed in the framework of the linear matrix inequality （LMI） approach, which can guarantee the disturbance tolerance ability and adaptive H-infinity performances of closed-loop systems in the cases of actuator saturation and actuator failures. An example is given to illustrate the efficiency of the design method.
基金This study was supported by the National Nature Science Foundation(81973440)National Key Research and Development Project(2018YFC1707100+1 种基金2018YFC1707103)Heilongjiang Touyan Innovation Team Program.
文摘Objective:The fruit stalk of Schisandra chinensis(Turcz.)Baill.(S.chinensis)has been found to contain bioactive components similar to the fruit of S.chinensis.Here,we report a recent discovery about new nortriterpenoids with a novel skeleton and anti-gastric cancer activity,which were isolated from the fruit stalk of S.chinensis.Methods:The chemical components of ethyl acetate extract from 70%ethanol extract from S.chinensis fruit stalk were separated,purified,and identified by liquid chromatography methods(silica gel,ODS,HPLC)and extensive spectroscopic analyses(NMR,IR,UV,MS,CD).Results:Two new nortriterpenoids,schilancitrilactone M and 25-hydroxyl schindilactone D(1 and 2),along with ten known nortriterpenoids(3-12)were isolated from the fruit stalk of S.chinensis.The isolated compounds were tested for their cytotoxic activities against MGC-803 cells,and the results showed that compounds 6-8 possessed significant activities with IC50 of 9.01,11.77,and 2.74μmol/L,respectively.Conclusion:Twelve nortriterpenoids including two new compounds were isolated from the fruit stalk of S.chinensis for the first time.Among them,compounds 6-8 showed significant anti-gastric cancer activities.We postulated that the fruit stalk of S.chinensis could be used as an anti-gastric cancer drug.
文摘The crystal structure of the ternary complex [Cu (L)(2, 2'-bipy)H2 O]·2H2O(L=phenylmalonate) has been determined by X-ray diffraction methods. The copperf(II) centerin five-coordinate Square-pyramidal structure.It is of interest in this structure that the complexinvolves a metal ion bridge ligand-ligand aromatic ring stacking interaction
基金This project is supported by the Natural Science Foundation of Education Bureau of Liaoning Province,China.
文摘Coordination polymer {[Cu（NPPCA）3（NO3）（H20）]-NOyH20}n 1 （ NPPCA = N-（4＇- nitrophenyl）-4-pyridinecarboxamide） has been synthesized by the reaction of NPPCA with copper（H） nitrate in ethanol-water solution and characterized by X-ray diffraction. 1 crystallizes in the monoclinic space, group P21/n, a = 17.341（6）A, b = 6.744（2）A, c = 34.555（12）A, β = 100.493（6）°, V = 3974（2） A^3, Z = 4. Each copper（H） ion has a distorted octahedral coordination geometry. Nitrate anion adopts the unusual coordination mode linking two adjacent copper（H） ions to form a one-dimensional coordination polymer and these chains are further linked by noncovalent interactions.
文摘Objective:To evaluate the efficiency,safety and clinical outcomes of Retziussparing robot-assisted radical prostatectomy(RS-RARP)in comparison with the standard RARP.Methods:A systematic search from Web of Science,PubMed,EMBase,Cochrane Library and Google Scholar was performed using the terms“Retzius-sparing”,“Bocciardi approach”and“robot-assisted radical prostatectomy”.Video articles and abstract papers for academic conferences were excluded.Meta-analysis of interested outcomes such as positive surgical margins(PSMs)and continence recovery was undertaken.A comprehensive literature review of all studies regarding Retzius-sparing(RS)approach was conducted and summarized.Results:From 2010 to 2017,11 original articles about RS-RARP approach were retrieved.Of that,only four studies comparing the RS-RARP approach to the conventional RARP were comparable for meta-analysis.Faster overall continence recovery within 1 month after the surgery was noted in the RS group(61%vs.43%;pZ0.004).PSMs of pT2 and pT3 stages were not significantly different between the groups(10.0%vs.7.4%;p Z 0.39 and 13.1%vs.9.5%,p Z 0.56,respectively).Of all the studies,only one reported sexual recovery outcomes after RS treatment in which 40%of the participants achieved sexual intercourse within the first month.Conclusion:Though more technically demanding than the conventional RARP,the RS technique is a safe and feasible approach.This meta-analysis and literature review indicates that RS technique,as opposed to the conventional approach,is associated with a faster continence recovery while PSMs were comparable between the two groups.The limitations of observational studies and the small data in our meta-analysis may prevent an ultimate conclusion.Future well-designed RCTs are needed to validate and confirm our findings.
