The 3D needled C/SiC brake materials modified with graphite were prepared by a combined process of the chemical vapor infiltration,slurry infiltration and liquid silicon infiltration process.The microstructure and fri...The 3D needled C/SiC brake materials modified with graphite were prepared by a combined process of the chemical vapor infiltration,slurry infiltration and liquid silicon infiltration process.The microstructure and frictional properties of the brake materials were investigated.The density and open porosity of the materials as-received were about(2.1±0.1)g/cm3and(5±1)%,respectively.The brake materials were composed of 59%C,39%SiC,and 2%Si(mass fraction).The content of Si in the C/SiC brake materials modified with graphite was far less than that in the C/SiC brake materials without being modified with graphite,and the Si was dispersed.The braking curve of the 3D needled C/SiC modified with graphite was smooth,which can ensure the smooth and comfortable braking.The frictional properties under wet condition of the 3D needled C/SiC modified with graphite showed no fading.And the linear wear rate of the C/SiC modified with graphite was lower than that of the C/SiC unmodified.展开更多
Objective： To evaluate the clinical effects of combined acupuncture and ear-puncture in treating renal colic. Methods： Sixty subjects were randomized into an acupuncture group and a medication group, 30 in each, to ...Objective： To evaluate the clinical effects of combined acupuncture and ear-puncture in treating renal colic. Methods： Sixty subjects were randomized into an acupuncture group and a medication group, 30 in each, to receive acupuncture and Western medicine respectively. The analgesic effects and pain relief time were measured in both groups. Results： Both of the two groups got pain relieved or reduced. The total effective rate was 89.7% in the acupuncture group, significantly superior to 77.4% in the medication group （P〈0.05）. Conclusion： Combined body and auricular acupuncture is efficient in relieving pain in treating renal colic, and its effective rate was higher compared with medication treatment.展开更多
Objective:To probe into the therapeutic efect of perfume stimulating olfaction with volatile oil of Acorus Gramineus on the Alzheimer’s disease (AD) rat. Methods: Totally 50 adult SD rats, male,weighing 300±10 g...Objective:To probe into the therapeutic efect of perfume stimulating olfaction with volatile oil of Acorus Gramineus on the Alzheimer’s disease (AD) rat. Methods: Totally 50 adult SD rats, male,weighing 300±10 g, were randomly divided into 5 groups, normal group (group A), olfactory nerve severing model group (group B), AD model group (group C), AD model plus perfume stimulation group (group D), AD model olfactory nerve severing plus perfume stimulation group (group E), 10 rats in each group. After perfume stimulation, Morris maze test was conducted for valuating the learning and memory ability; Malondaldehyde (MDA) content, and superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities in the brain, and the brain weight were detected. Results: Compared with the AD model group,the average escape latency and swimming distance in 6 days were significantly shorter than those in the group A, B, D (P<0.01), with no significant differences between the group C and the group E (P>0.05); Compared with the group A, B and D, MDA content in the group C significantly increased (P<0.01), and SOD and GSH-Px activities significantly decreased (P<0.01), and brain weight/body weight decreased significantly in the group C (P<0.01), with no significant differences between the group C and the group E (P>0.05). Conclusion: Perfume stimultating olfaction with volatile oil of Acorus Gramineus can significantly increase the learning-memory ability, decrease MDA content and increase SOD and GSH-Px activities and weight of brain in AD rats.展开更多
Objective： To observe the therapeutic effects of puncturing the lower He-Sea points in treatment of functional gastrointestinal disorder after gallstone removal surgery. Methods： Forty post-surgery patients were ran...Objective： To observe the therapeutic effects of puncturing the lower He-Sea points in treatment of functional gastrointestinal disorder after gallstone removal surgery. Methods： Forty post-surgery patients were randomly allocated to two groups by stratified sampling, 20 in each group. The treatment group was given conventional post-surgery treatment as well as acupuncture at the lower He-Sea points of stomach, large intestine, small intestine and gallbladder; the control group only received conventional treatment. Result： Compared to the control group, it took a shorter time for the treatment group to restore the gastrointestinal function and the difference was statistically significant （P〈0.05）. Conclusion： Acupuncture at lower He-Sea points can shorten the healing process of gastro-intestinal function after gallstone removal surgery.展开更多
Review of the literature on Ordovician conodont diversification in palaeoplates of North and Western China reveals that four diversity peaks are present in North China,occurring in the middle Tremadocian,early Floian,...Review of the literature on Ordovician conodont diversification in palaeoplates of North and Western China reveals that four diversity peaks are present in North China,occurring in the middle Tremadocian,early Floian,late Floian,and late Darriwilian,with three of these peaks(excepting that in the late Floian)also being recorded in Tarim.Three diversification intervals are present in North China,during the Tremadocian,late Floian,early and middle Darriwilian;comparable intervals are observed in the early and late Tremadocian,early Floian,and the Middle Ordovician in Tarim.The main conodont diversification episode in both palaeoplates took place in the Darriwilian,at the time of the Great Ordovician Biodiversification Event.A comparison of conodont diversity patterns in different palaeoplates(North China,Tarim,and South China)demonstrates that conodont radiation events mainly occurred within the Tremadocian,Floian,and Darriwilian.Conodont diversifications in these paleoplates also display some differences.In contrasting with Tarim and South China,North China witnessed a rapid conodont diversification during late Floian time.Conodont diversity in North China and Tarim increased continually and reached a peak in the late Darriwilian,concurrent with a prominent decreasing trend in South China.Differences of conodont diversification in these three palaeoplates may be related to their palaeogeography and tectonic history.When conodont diversifications in North China and Tarim are analysed on the background of palaeoenvironments,the main episodes are seen to be partly coincident with second order sea-level changes,particularly in North China.In general,conodont radiation correlates with large scale transgressions.展开更多
基金Project(46-QP-2009)supported by the Research Fund of State Key Laboratory of Solidification Processing(NWPU),ChinaProject supported by the Program for Changjiang Scholars and Innovative Research Team in Chinese University
文摘The 3D needled C/SiC brake materials modified with graphite were prepared by a combined process of the chemical vapor infiltration,slurry infiltration and liquid silicon infiltration process.The microstructure and frictional properties of the brake materials were investigated.The density and open porosity of the materials as-received were about(2.1±0.1)g/cm3and(5±1)%,respectively.The brake materials were composed of 59%C,39%SiC,and 2%Si(mass fraction).The content of Si in the C/SiC brake materials modified with graphite was far less than that in the C/SiC brake materials without being modified with graphite,and the Si was dispersed.The braking curve of the 3D needled C/SiC modified with graphite was smooth,which can ensure the smooth and comfortable braking.The frictional properties under wet condition of the 3D needled C/SiC modified with graphite showed no fading.And the linear wear rate of the C/SiC modified with graphite was lower than that of the C/SiC unmodified.
文摘Objective： To evaluate the clinical effects of combined acupuncture and ear-puncture in treating renal colic. Methods： Sixty subjects were randomized into an acupuncture group and a medication group, 30 in each, to receive acupuncture and Western medicine respectively. The analgesic effects and pain relief time were measured in both groups. Results： Both of the two groups got pain relieved or reduced. The total effective rate was 89.7% in the acupuncture group, significantly superior to 77.4% in the medication group （P〈0.05）. Conclusion： Combined body and auricular acupuncture is efficient in relieving pain in treating renal colic, and its effective rate was higher compared with medication treatment.
基金supported by a grant from National Natural Science Foundation of China (No.30973792)
文摘Objective:To probe into the therapeutic efect of perfume stimulating olfaction with volatile oil of Acorus Gramineus on the Alzheimer’s disease (AD) rat. Methods: Totally 50 adult SD rats, male,weighing 300±10 g, were randomly divided into 5 groups, normal group (group A), olfactory nerve severing model group (group B), AD model group (group C), AD model plus perfume stimulation group (group D), AD model olfactory nerve severing plus perfume stimulation group (group E), 10 rats in each group. After perfume stimulation, Morris maze test was conducted for valuating the learning and memory ability; Malondaldehyde (MDA) content, and superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities in the brain, and the brain weight were detected. Results: Compared with the AD model group,the average escape latency and swimming distance in 6 days were significantly shorter than those in the group A, B, D (P<0.01), with no significant differences between the group C and the group E (P>0.05); Compared with the group A, B and D, MDA content in the group C significantly increased (P<0.01), and SOD and GSH-Px activities significantly decreased (P<0.01), and brain weight/body weight decreased significantly in the group C (P<0.01), with no significant differences between the group C and the group E (P>0.05). Conclusion: Perfume stimultating olfaction with volatile oil of Acorus Gramineus can significantly increase the learning-memory ability, decrease MDA content and increase SOD and GSH-Px activities and weight of brain in AD rats.
文摘Objective： To observe the therapeutic effects of puncturing the lower He-Sea points in treatment of functional gastrointestinal disorder after gallstone removal surgery. Methods： Forty post-surgery patients were randomly allocated to two groups by stratified sampling, 20 in each group. The treatment group was given conventional post-surgery treatment as well as acupuncture at the lower He-Sea points of stomach, large intestine, small intestine and gallbladder; the control group only received conventional treatment. Result： Compared to the control group, it took a shorter time for the treatment group to restore the gastrointestinal function and the difference was statistically significant （P〈0.05）. Conclusion： Acupuncture at lower He-Sea points can shorten the healing process of gastro-intestinal function after gallstone removal surgery.
基金supported by National Natural Science Foundation of China(Grant Nos.41202005,41221001,40825006)State Key Laboratory of Palaeobiology and Stratigraphy(Grant No.Y126110409)+1 种基金Chinese Academy of Sciences(Grant No.KZCX2-YW-Q05-01)a contribution to Project IGCP 591:The Early to Middle Paleozoic Revolution
文摘Review of the literature on Ordovician conodont diversification in palaeoplates of North and Western China reveals that four diversity peaks are present in North China,occurring in the middle Tremadocian,early Floian,late Floian,and late Darriwilian,with three of these peaks(excepting that in the late Floian)also being recorded in Tarim.Three diversification intervals are present in North China,during the Tremadocian,late Floian,early and middle Darriwilian;comparable intervals are observed in the early and late Tremadocian,early Floian,and the Middle Ordovician in Tarim.The main conodont diversification episode in both palaeoplates took place in the Darriwilian,at the time of the Great Ordovician Biodiversification Event.A comparison of conodont diversity patterns in different palaeoplates(North China,Tarim,and South China)demonstrates that conodont radiation events mainly occurred within the Tremadocian,Floian,and Darriwilian.Conodont diversifications in these paleoplates also display some differences.In contrasting with Tarim and South China,North China witnessed a rapid conodont diversification during late Floian time.Conodont diversity in North China and Tarim increased continually and reached a peak in the late Darriwilian,concurrent with a prominent decreasing trend in South China.Differences of conodont diversification in these three palaeoplates may be related to their palaeogeography and tectonic history.When conodont diversifications in North China and Tarim are analysed on the background of palaeoenvironments,the main episodes are seen to be partly coincident with second order sea-level changes,particularly in North China.In general,conodont radiation correlates with large scale transgressions.
