[Objective] This study aimed to isolate and screen black-spot-resistant en- dophytic fungi strains. [Method] Various species of healthy Rosa chinensis were col- lected from Xi＇an, Xianyang, Baoji and Weinan City in S...[Objective] This study aimed to isolate and screen black-spot-resistant en- dophytic fungi strains. [Method] Various species of healthy Rosa chinensis were col- lected from Xi＇an, Xianyang, Baoji and Weinan City in Shaanxi Province. Endophytic fungi was isolated from stems and leaves, and purified by 2-3 times of inoculation to screen endophytic fungi antagonistic to Marssonina rosae with modified punching method. [Result] Samples collected from Xianyang exhibited the highest colonization rate and isolation rate; endophytic fungi strains isolated from stems presented the highest colonization rate and isolation rate compared with leaves. A total of 67 en- dophytic fungi strains were isolated from Rosa chinensis, including 3 black spot-re- sistant strains which were all derived from Baoji. [Conclusion] This study laid the foundation for further screening candidate strains of biocontrol fungi and environ- ment-friendly fungal biological control.展开更多
In this study, we used the Navy’s Generalized Digital Environmental Model (GDEM) climatological temperature and salinity data on a 0.5°×0.5° grid to investigate the seasonal variabilities of the southw...In this study, we used the Navy’s Generalized Digital Environmental Model (GDEM) climatological temperature and salinity data on a 0.5°×0.5° grid to investigate the seasonal variabilities of the southwest Philippines Sea (0.5°–9°N, 123.5°–136.5°) thermohaline structure and circulation. The GDEM for the area was built up on historical (1930–1997) temperature and salinity profiles. A three-dimensional estimate of the absolute geostrophic velocity field on isopycnal surface was obtained from the GDEM temperature and salinity fields using the P-vector method. The seasonal variabilities of the thermohaline structure and currents (obtained from the inverse method) such as the Mindanao Current, Mindanao Undercurrent, North Equatorial Counter Current, New Guinea Coastal Undercurrent, and dual-eddies (cyclinic Mindanao Eddy and anticyclonic Halmahera Eddy) are identified.展开更多
AIM:To evaluate the proportion of successful complete cure en-bloc resections of large colorectal polyps achieved by endoscopic mucosal resection(EMR). METHODS:Studies using the EMR technique to resect large colorecta...AIM:To evaluate the proportion of successful complete cure en-bloc resections of large colorectal polyps achieved by endoscopic mucosal resection(EMR). METHODS:Studies using the EMR technique to resect large colorectal polyps were selected.Successful complete cure en-bloc resection was defined as one piece margin-free polyp resection.Articles were searched for in Medline,Pubmed,and the Cochrane Control Trial Registry,among other sources. RESULTS:An initial search identified 2620 reference articles,from which 429 relevant articles were selected and reviewed.Data was extracted from 25 studies(n =5221)which met the inclusion criteria.All the studies used snares to perform EMR.Pooled proportion of en-bloc resections using a random effect model was 62.85%(95%CI:51.50-73.52).The pooled proportion for complete cure en-bloc resections using a random effect model was 58.66%(95%CI:47.14-69.71).With higher patient load(>200 patients),this complete cure en-bloc resection rate improves from 44.19%(95%CI: 24.31-65.09)to 69.17%(95%CI:51.11-84.61). CONCLUSION:EMR is an effective technique for the resection of large colorectal polyps and offers an alternative to surgery.展开更多
In order to solve the problem that the drivers can't find the optimal parking lot timely,a reservation based optimal parking lot recommendation model in Internet of Vehicle(IoV) environment is designed.Based on th...In order to solve the problem that the drivers can't find the optimal parking lot timely,a reservation based optimal parking lot recommendation model in Internet of Vehicle(IoV) environment is designed.Based on the users oriented parking information recommendation system,the model considers subjective demands of drivers comprehensively,makes a deeply analysis of the evaluation indicators.This recommendation model uses a phased selection method to calculate the optimal objective parking lot.The first stage is screening which based on the users' subjective parking demands;the second stage is processing the candidate parking lots through multiple attribute decision making.Simulation experiments show that this model can effectively solve the problems encountered in the process of finding optimal parking lot,save the driver's parking time and parking costs and also improve the overall utilization of parking facilities to ease the traffic congestion caused by vehicles parked patrol.展开更多
We revisit the quantum decoherence problem of the center of mass motion of a macroscopic object, which is modelled as a one-dimensional atom chain. Induced by the coupling of the center of mass （C.M） motion with the...We revisit the quantum decoherence problem of the center of mass motion of a macroscopic object, which is modelled as a one-dimensional atom chain. Induced by the coupling of the center of mass （C.M） motion with the inner degrees of freedom, this inner-environment-induced decoherence is reflected by the localization of the C.M wave packet. We show that, the C.M motion is coupled to the inner states only when the chain has interaction with the external potential. This result provides a realistic mechanism for the analysis of the inner-environment-induced localization of a macroscopic object.展开更多
In this work,we developed the CHARMM all-atom force field parameters for the nonstandard biological residue chalcone,followed by the standard protocol for the CHARMM27 force field development.Target data were generate...In this work,we developed the CHARMM all-atom force field parameters for the nonstandard biological residue chalcone,followed by the standard protocol for the CHARMM27 force field development.Target data were generated via ab initio calculations at the MP2/6-31G* and HF/6-31G* levels.The reference data included interaction energies between water and the model compound F(a fragment of chalcone).Bond,angle,and torsion parameters were derived from the ab initio calculations and renormalized to maintain compatibility with the existing CHARMM27 parameters of standard residues.The optimized CHARMM parameters perform well in reproducing the target data.We expect that the extension of the CHARMM27 force field parameters for chalcone will facilitate the molecular simulation studies of the reaction mechanism of intramolecular cyclization of chalcone catalyzed by chalcone isomerase.展开更多
基金Supported by National Natural Science Foundation of China(No.31000144)Project of Shaanxi Provincial Science and Technology Department(No.2012JQ3017)+1 种基金Project of Xi'an Science and Technology Bureau[NC1206(3)]Project of Education Department of Shaanxi Provincial Government(No.12JK1106)~~
文摘[Objective] This study aimed to isolate and screen black-spot-resistant en- dophytic fungi strains. [Method] Various species of healthy Rosa chinensis were col- lected from Xi＇an, Xianyang, Baoji and Weinan City in Shaanxi Province. Endophytic fungi was isolated from stems and leaves, and purified by 2-3 times of inoculation to screen endophytic fungi antagonistic to Marssonina rosae with modified punching method. [Result] Samples collected from Xianyang exhibited the highest colonization rate and isolation rate; endophytic fungi strains isolated from stems presented the highest colonization rate and isolation rate compared with leaves. A total of 67 en- dophytic fungi strains were isolated from Rosa chinensis, including 3 black spot-re- sistant strains which were all derived from Baoji. [Conclusion] This study laid the foundation for further screening candidate strains of biocontrol fungi and environ- ment-friendly fungal biological control.
文摘In this study, we used the Navy’s Generalized Digital Environmental Model (GDEM) climatological temperature and salinity data on a 0.5°×0.5° grid to investigate the seasonal variabilities of the southwest Philippines Sea (0.5°–9°N, 123.5°–136.5°) thermohaline structure and circulation. The GDEM for the area was built up on historical (1930–1997) temperature and salinity profiles. A three-dimensional estimate of the absolute geostrophic velocity field on isopycnal surface was obtained from the GDEM temperature and salinity fields using the P-vector method. The seasonal variabilities of the thermohaline structure and currents (obtained from the inverse method) such as the Mindanao Current, Mindanao Undercurrent, North Equatorial Counter Current, New Guinea Coastal Undercurrent, and dual-eddies (cyclinic Mindanao Eddy and anticyclonic Halmahera Eddy) are identified.
文摘AIM:To evaluate the proportion of successful complete cure en-bloc resections of large colorectal polyps achieved by endoscopic mucosal resection(EMR). METHODS:Studies using the EMR technique to resect large colorectal polyps were selected.Successful complete cure en-bloc resection was defined as one piece margin-free polyp resection.Articles were searched for in Medline,Pubmed,and the Cochrane Control Trial Registry,among other sources. RESULTS:An initial search identified 2620 reference articles,from which 429 relevant articles were selected and reviewed.Data was extracted from 25 studies(n =5221)which met the inclusion criteria.All the studies used snares to perform EMR.Pooled proportion of en-bloc resections using a random effect model was 62.85%(95%CI:51.50-73.52).The pooled proportion for complete cure en-bloc resections using a random effect model was 58.66%(95%CI:47.14-69.71).With higher patient load(>200 patients),this complete cure en-bloc resection rate improves from 44.19%(95%CI: 24.31-65.09)to 69.17%(95%CI:51.11-84.61). CONCLUSION:EMR is an effective technique for the resection of large colorectal polyps and offers an alternative to surgery.
基金partially supported by the National Natural Science Foundation of China under Grants No.60903176the Provincial Natural Science Foundation of Shandong under Grants No.ZR2012FM010,No.ZR2010FQ028+1 种基金the Program for Youth science and technology starfund of Jinan No.TNK1108the Sub-Project of the National Key Technology R&D Program No.2012BAF12B07-3
文摘In order to solve the problem that the drivers can't find the optimal parking lot timely,a reservation based optimal parking lot recommendation model in Internet of Vehicle(IoV) environment is designed.Based on the users oriented parking information recommendation system,the model considers subjective demands of drivers comprehensively,makes a deeply analysis of the evaluation indicators.This recommendation model uses a phased selection method to calculate the optimal objective parking lot.The first stage is screening which based on the users' subjective parking demands;the second stage is processing the candidate parking lots through multiple attribute decision making.Simulation experiments show that this model can effectively solve the problems encountered in the process of finding optimal parking lot,save the driver's parking time and parking costs and also improve the overall utilization of parking facilities to ease the traffic congestion caused by vehicles parked patrol.
基金The project supported by National Natural Science Foundation of China under Grant Nos. 10547106, 90203018, 10474104, and 60433050, and the National Fundamental Research Program of China under Grant Nos. 2001CB309310 and 2005CB724508 L. Zheng thanks sincerely C.P. Sun and P. Zhang for their helpful discussions.
文摘We revisit the quantum decoherence problem of the center of mass motion of a macroscopic object, which is modelled as a one-dimensional atom chain. Induced by the coupling of the center of mass （C.M） motion with the inner degrees of freedom, this inner-environment-induced decoherence is reflected by the localization of the C.M wave packet. We show that, the C.M motion is coupled to the inner states only when the chain has interaction with the external potential. This result provides a realistic mechanism for the analysis of the inner-environment-induced localization of a macroscopic object.
基金National Institute of Biological Science, Beijing 102206,Chinasupported by the Major State Basic Research Development Programs of China(2011CBA00701)+3 种基金the National Natural Science Foundation of China(20973077,20973049)the Doctoral Fund of Ministry of Education of China(20112303110005)the Foundation for the Department of Education of Heilongjiang Province (1152G010,11551077)the Science Foundation for Leading Experts in Academe of Harbin of China(2011RFJGS026)
文摘In this work,we developed the CHARMM all-atom force field parameters for the nonstandard biological residue chalcone,followed by the standard protocol for the CHARMM27 force field development.Target data were generated via ab initio calculations at the MP2/6-31G* and HF/6-31G* levels.The reference data included interaction energies between water and the model compound F(a fragment of chalcone).Bond,angle,and torsion parameters were derived from the ab initio calculations and renormalized to maintain compatibility with the existing CHARMM27 parameters of standard residues.The optimized CHARMM parameters perform well in reproducing the target data.We expect that the extension of the CHARMM27 force field parameters for chalcone will facilitate the molecular simulation studies of the reaction mechanism of intramolecular cyclization of chalcone catalyzed by chalcone isomerase.
