Drilling carbon fiber reinforced polymer(CFRP)composites is liable to generate serious defects including burrs,delamination,fiber pullouts and matrix cracking because of their inherent anisotropy in mechanical propert...Drilling carbon fiber reinforced polymer(CFRP)composites is liable to generate serious defects including burrs,delamination,fiber pullouts and matrix cracking because of their inherent anisotropy in mechanical properties.Therefore,studies on drilling quality during composites processing is necessary. The thrust force of different material drill bits in composites drilling process was measured by the dynamometer and the surface quality of the hole wall was observed by scanning electron microscope(SEM),moreover,the tool wear and its effects on the hole wall quality were also taken into account.展开更多
Understanding the excited state dynamics of donor-acceptor(D-A)complexes is of fundamental importance both experimentally and theoretically.Herein,we have first explored the photoinduced dynamics of a recently synthes...Understanding the excited state dynamics of donor-acceptor(D-A)complexes is of fundamental importance both experimentally and theoretically.Herein,we have first explored the photoinduced dynamics of a recently synthesized paddle-wheel BODIPY-hexaoxatriphenylene(BODIPY is the abbreviation for BF_(2)-chelated dipyrromethenes)conjugates D-A complexes with the combination of both electronic structure calculations and nonadiabatic dynamics simulations.On the basis of computational results,we concluded that the BODIPY-hexaoxatriphenylene(BH)conjugates will be promoted to the local excited(LE)states of the BODIPY fragments upon excitation,which is followed by the ultrafast exciton transfer from LE state to charge transfer(CT).Instead of the photoinduced electron transfer process proposed in previous experimental work,such a exciton transfer process is accompanied with the photoinduced hole transfer from BODIPY to hexaoxatriphenylene.Additionally,solvent effects are found to play an important role in the photoinduced dynamics.Specifically,the hole transfer dynamics is accelerated by the acetonitrile solvent,which can be ascribed to significant influences of the solvents on the charge transfer states,i.e.the energy gaps between LE and CT excitons are reduced greatly and the non-adiabatic couplings are increased in the meantime.Our present work not only provides valuable insights into the underlying photoinduced mechanism of BH,but also can be helpful for the future design of novel donor-acceptor conjugates with better optoelectronic performance.展开更多
Introduction： Propofol is an intravenous general anesthetic and sedation drug for use in the induction and maintenance of anesthesia or sedation. It is included in WHO Model List of Essential medicines and approved b...Introduction： Propofol is an intravenous general anesthetic and sedation drug for use in the induction and maintenance of anesthesia or sedation. It is included in WHO Model List of Essential medicines and approved by the FDA （food and drug administration） in 1989. The side effects of Propofol have been studied widely in the last 25 years. They can be easily managed and that is why Propofol has become a fn＇st choice drug for the most of the anesthesiologists worldwide. This paper presents a case report of Propofol induced pulmonary edema and also a review of some of the rarest and unusual manifestations of Propofol side effects. Some of them are urine discoloration, tissue necrosis, rhabdomyolysis and postoperative panereatitis. Methods and materials： A case summary of 18-years old woman with unusual postoperative pulmonary reaction was considered along with other documented cases. Several full-text articles were briefly analyzed for estimating the role of Propofol for a number of strange and potentially life threatening conditions. Results： Despite the low incidence rate, the presented case could be determined as a pulmonary edema due to its clinical features. Furthermore, rare drug reactions such as rhabdomyolysis, tissue necrosis, postoperative pancreatitis etc. may remain unrecognized and create diagnostic and therapeutic issues. Conclusions： Although the officially reported dangerous reaction, Propofol remains one of the best hypnotic and sedative agents. The better knowledge of the full list of drug reactions considered as rare and very rare is a guarantee of an adequate and a better therapeutic behavior.展开更多
Objective： To observe the effect of electro-acupuncture on the relapse to heroin-seeking induced by heroin-related cues after withdrawal from heroin self-administration in rats. Methods： Sixty male Wistar rats were ...Objective： To observe the effect of electro-acupuncture on the relapse to heroin-seeking induced by heroin-related cues after withdrawal from heroin self-administration in rats. Methods： Sixty male Wistar rats were randomized into physiological saline group, withdrawal group A, withdrawal group B, electro-acupuncture （EA） treatment group A and EA treatment group B, with 12 rats in each group. The rats were trained by nose-poke response to self administer heroin （50μg/kg/per infusion） or saline with one daily 4-h session for 14 consecutive days, the session ended after 25 infusions were earned or 4 hours had passed, the reinforcement schedule was a progressive ratio. Then rats in withdrawal group A and withdrawal group B were withdrawn from heroin for 1 week and 2 weeks respectively, and then they were reintroduced to their training chambers for 4-h relapse testing which was induced by heroin-related environmental cues; And rats in EA treatment group A and EA treatment group B were also withdrawn from heroin for 1 week and 2 weeks respectively, during which they were given EA treatment for 20 min daily, then they received relapse testing; In the meantime, rats in saline group were trained with saline instead of heroin for 14 days as control, after 7 days of withdrawal from saline, they received relapse testing. Results： Following 7-8 days of drug training, the rats began to establish the stable intravenous heroin self-administration behavior; For the stable heroin self-administrating rats that received EA treatment, when they were reintroduced to their training chambers, their heroin-seeking behaviors were obviously inhibited, and this inhibitory effect related to the cumulativeness of EA stimulation. Conclusion： The results suggested that EA could prevent relapse to heroin-seeking to a certain extent.展开更多
文摘Drilling carbon fiber reinforced polymer(CFRP)composites is liable to generate serious defects including burrs,delamination,fiber pullouts and matrix cracking because of their inherent anisotropy in mechanical properties.Therefore,studies on drilling quality during composites processing is necessary. The thrust force of different material drill bits in composites drilling process was measured by the dynamometer and the surface quality of the hole wall was observed by scanning electron microscope(SEM),moreover,the tool wear and its effects on the hole wall quality were also taken into account.
基金supported by the National Natural Science Foundation of China(No.22003043 for Xiang-Yang Liu)the National Natural Science Foundation of China(No.21688102,No.21590801,and No.21520102005 for Ganglong Cui)+1 种基金Sichuan Science and Technology Program(No.2020YJ0161 for Xiang-Yang Liu)the High Performance Computing Center of Sichuan Normal University。
文摘Understanding the excited state dynamics of donor-acceptor(D-A)complexes is of fundamental importance both experimentally and theoretically.Herein,we have first explored the photoinduced dynamics of a recently synthesized paddle-wheel BODIPY-hexaoxatriphenylene(BODIPY is the abbreviation for BF_(2)-chelated dipyrromethenes)conjugates D-A complexes with the combination of both electronic structure calculations and nonadiabatic dynamics simulations.On the basis of computational results,we concluded that the BODIPY-hexaoxatriphenylene(BH)conjugates will be promoted to the local excited(LE)states of the BODIPY fragments upon excitation,which is followed by the ultrafast exciton transfer from LE state to charge transfer(CT).Instead of the photoinduced electron transfer process proposed in previous experimental work,such a exciton transfer process is accompanied with the photoinduced hole transfer from BODIPY to hexaoxatriphenylene.Additionally,solvent effects are found to play an important role in the photoinduced dynamics.Specifically,the hole transfer dynamics is accelerated by the acetonitrile solvent,which can be ascribed to significant influences of the solvents on the charge transfer states,i.e.the energy gaps between LE and CT excitons are reduced greatly and the non-adiabatic couplings are increased in the meantime.Our present work not only provides valuable insights into the underlying photoinduced mechanism of BH,but also can be helpful for the future design of novel donor-acceptor conjugates with better optoelectronic performance.
文摘Introduction： Propofol is an intravenous general anesthetic and sedation drug for use in the induction and maintenance of anesthesia or sedation. It is included in WHO Model List of Essential medicines and approved by the FDA （food and drug administration） in 1989. The side effects of Propofol have been studied widely in the last 25 years. They can be easily managed and that is why Propofol has become a fn＇st choice drug for the most of the anesthesiologists worldwide. This paper presents a case report of Propofol induced pulmonary edema and also a review of some of the rarest and unusual manifestations of Propofol side effects. Some of them are urine discoloration, tissue necrosis, rhabdomyolysis and postoperative panereatitis. Methods and materials： A case summary of 18-years old woman with unusual postoperative pulmonary reaction was considered along with other documented cases. Several full-text articles were briefly analyzed for estimating the role of Propofol for a number of strange and potentially life threatening conditions. Results： Despite the low incidence rate, the presented case could be determined as a pulmonary edema due to its clinical features. Furthermore, rare drug reactions such as rhabdomyolysis, tissue necrosis, postoperative pancreatitis etc. may remain unrecognized and create diagnostic and therapeutic issues. Conclusions： Although the officially reported dangerous reaction, Propofol remains one of the best hypnotic and sedative agents. The better knowledge of the full list of drug reactions considered as rare and very rare is a guarantee of an adequate and a better therapeutic behavior.
基金Supported by the National Nature Science Foundation （30271637） and the State Administration of TCM （02-03LQ05）
文摘Objective： To observe the effect of electro-acupuncture on the relapse to heroin-seeking induced by heroin-related cues after withdrawal from heroin self-administration in rats. Methods： Sixty male Wistar rats were randomized into physiological saline group, withdrawal group A, withdrawal group B, electro-acupuncture （EA） treatment group A and EA treatment group B, with 12 rats in each group. The rats were trained by nose-poke response to self administer heroin （50μg/kg/per infusion） or saline with one daily 4-h session for 14 consecutive days, the session ended after 25 infusions were earned or 4 hours had passed, the reinforcement schedule was a progressive ratio. Then rats in withdrawal group A and withdrawal group B were withdrawn from heroin for 1 week and 2 weeks respectively, and then they were reintroduced to their training chambers for 4-h relapse testing which was induced by heroin-related environmental cues; And rats in EA treatment group A and EA treatment group B were also withdrawn from heroin for 1 week and 2 weeks respectively, during which they were given EA treatment for 20 min daily, then they received relapse testing; In the meantime, rats in saline group were trained with saline instead of heroin for 14 days as control, after 7 days of withdrawal from saline, they received relapse testing. Results： Following 7-8 days of drug training, the rats began to establish the stable intravenous heroin self-administration behavior; For the stable heroin self-administrating rats that received EA treatment, when they were reintroduced to their training chambers, their heroin-seeking behaviors were obviously inhibited, and this inhibitory effect related to the cumulativeness of EA stimulation. Conclusion： The results suggested that EA could prevent relapse to heroin-seeking to a certain extent.
