OBJECTIVE： To observe the influence of moxibustion temperature on blood lipids, endothelin-1（ET-1）, nitric oxide（NO）, and ET-1/NO in hyperlipidemia patients. METHODS： Forty-two primary hyperlipidemia patients we...OBJECTIVE： To observe the influence of moxibustion temperature on blood lipids, endothelin-1（ET-1）, nitric oxide（NO）, and ET-1/NO in hyperlipidemia patients. METHODS： Forty-two primary hyperlipidemia patients were randomly divided into two groups of 21 and treated with moxibustion at different temperatures. Moxibustion was performed with the moxa roll 2.5-3.0 cm from the skin in the treatment group and 4 cm in the control group, 10 min per point, once every other day. Skin temperature was precisely measured with a thermometer during moxibustion. After a 12-week treatment, seven measurements of blood lipids, ET-1, and NO were recorded. RESULTS： Total cholesterol and triglyceride, were lower in the treatment group than in the control group（P0.05）. Serum ET-1 and ET-1/NO was obvi-ously lowered in the treatment group（P0.001）. Moxibustion regulated NO and ET-1/NO in the treatment group much better than in the control group. CONCLUSION： Moxibustion can regulate blood lipids and clear blood vessels. Moxibustion at 45℃has a better effect than moxibustion at 38℃ on regulating blood lipids and protecting vascular endothelial function, indicating that suitable temperature influences the curative effect of moxibustion.展开更多
Thermo-electro-magnetic materials with simultaneously large magnetocaloric(MC)and thermoelectric(TE)effects are the core part for designing TE/MC all-solid-state cooling devices.Compositing MC phase with TE material i...Thermo-electro-magnetic materials with simultaneously large magnetocaloric(MC)and thermoelectric(TE)effects are the core part for designing TE/MC all-solid-state cooling devices.Compositing MC phase with TE material is an effective approach.However,the elemental diffusion and chemical reaction occurring at the two-phase interfaces could significantly impair the cooling performance.Herein,Gd/Bi_(0.5)Sb_(1.5)Te_(3)(Gd/BST)composites were prepared by a low-temperature high-pressure spark plasma sintering method with an aim to control the extent of interfacial reaction.The reaction of Gd with the diffusive Te and the formation of GdTe nanocrystals were identified at the Gd/BST interfaces by the atomic-resolution microscope.The formed Bi’_(Te)antisite defects and enhanced{000 l}preferential orientation in BST are responsible for the increased carrier concentration and mobility,which leads to optimized electrical properties.The heterogeneous interface phases,along with antisite defects,favor the phonon scattering enhancement and lattice thermal conductivity suppression.The optimized composite sintered at 693 K exhibited a maximum ZT of 1.27 at 300 K.Furthermore,the well-controlled interfacial reaction has a slight impact on the magnetic properties of Gd and a high magnetic entropy change is retained in the composites.This work provides a universal approach to fabricating thermo-electro-magnetic materials with excellent MC and TE properties.展开更多
Flexible thermoelectric power generation isincreasingly recognized as a viable solution for poweringwearable electronic devices. However, the performance limitationsof n-type flexible thin films have restricted their ...Flexible thermoelectric power generation isincreasingly recognized as a viable solution for poweringwearable electronic devices. However, the performance limitationsof n-type flexible thin films have restricted their widerapplication. Here, we successfully fabricated n-type Ag_(2)Se thinfilms with a high power factor of 2.14 mW m^(−1) K^(−2) at 300 Kthrough texture engineering. Utilizing a straightforwardthermal evaporation technique, we produced (201)-textured ntypeAg_(2)Se thin films by employing Se precursor strategies.Both experimental and theoretical analyses reveal that Ag_(2)Sethin films with this specific orientation exhibit superior carriermobility and a high Seebeck coefficient. Moreover, theinherent low thermal conductivity of Ag_(2)Se is further reducedby the presence of nanopores and random in-plane orientation,which effectively scatter phonons across various wavelengths.As a result, the Ag_(2)Se films achieved an optimal ZTvalue of 0.73 at 363 K, suggesting substantial potential forfurther improvements. This research not only demonstrates astrategic method to manipulate the crystallographic orientationof Ag_(2)Se thin films but also opens up new possibilities fordeveloping high-performance thermoelectric materials.展开更多
文摘OBJECTIVE： To observe the influence of moxibustion temperature on blood lipids, endothelin-1（ET-1）, nitric oxide（NO）, and ET-1/NO in hyperlipidemia patients. METHODS： Forty-two primary hyperlipidemia patients were randomly divided into two groups of 21 and treated with moxibustion at different temperatures. Moxibustion was performed with the moxa roll 2.5-3.0 cm from the skin in the treatment group and 4 cm in the control group, 10 min per point, once every other day. Skin temperature was precisely measured with a thermometer during moxibustion. After a 12-week treatment, seven measurements of blood lipids, ET-1, and NO were recorded. RESULTS： Total cholesterol and triglyceride, were lower in the treatment group than in the control group（P0.05）. Serum ET-1 and ET-1/NO was obvi-ously lowered in the treatment group（P0.001）. Moxibustion regulated NO and ET-1/NO in the treatment group much better than in the control group. CONCLUSION： Moxibustion can regulate blood lipids and clear blood vessels. Moxibustion at 45℃has a better effect than moxibustion at 38℃ on regulating blood lipids and protecting vascular endothelial function, indicating that suitable temperature influences the curative effect of moxibustion.
基金supported by the National Key Research and Development Program of China(2019YFA0704903)National Natural Science Foundation of China(11834012,52130203,92163122,91963207,91963122)
文摘Thermo-electro-magnetic materials with simultaneously large magnetocaloric(MC)and thermoelectric(TE)effects are the core part for designing TE/MC all-solid-state cooling devices.Compositing MC phase with TE material is an effective approach.However,the elemental diffusion and chemical reaction occurring at the two-phase interfaces could significantly impair the cooling performance.Herein,Gd/Bi_(0.5)Sb_(1.5)Te_(3)(Gd/BST)composites were prepared by a low-temperature high-pressure spark plasma sintering method with an aim to control the extent of interfacial reaction.The reaction of Gd with the diffusive Te and the formation of GdTe nanocrystals were identified at the Gd/BST interfaces by the atomic-resolution microscope.The formed Bi’_(Te)antisite defects and enhanced{000 l}preferential orientation in BST are responsible for the increased carrier concentration and mobility,which leads to optimized electrical properties.The heterogeneous interface phases,along with antisite defects,favor the phonon scattering enhancement and lattice thermal conductivity suppression.The optimized composite sintered at 693 K exhibited a maximum ZT of 1.27 at 300 K.Furthermore,the well-controlled interfacial reaction has a slight impact on the magnetic properties of Gd and a high magnetic entropy change is retained in the composites.This work provides a universal approach to fabricating thermo-electro-magnetic materials with excellent MC and TE properties.
基金supported by the National Key Research and Development Program of China (2023YFB3809400)the National Natural Science Foundation of China (52130203 and 92463310)。
文摘Flexible thermoelectric power generation isincreasingly recognized as a viable solution for poweringwearable electronic devices. However, the performance limitationsof n-type flexible thin films have restricted their widerapplication. Here, we successfully fabricated n-type Ag_(2)Se thinfilms with a high power factor of 2.14 mW m^(−1) K^(−2) at 300 Kthrough texture engineering. Utilizing a straightforwardthermal evaporation technique, we produced (201)-textured ntypeAg_(2)Se thin films by employing Se precursor strategies.Both experimental and theoretical analyses reveal that Ag_(2)Sethin films with this specific orientation exhibit superior carriermobility and a high Seebeck coefficient. Moreover, theinherent low thermal conductivity of Ag_(2)Se is further reducedby the presence of nanopores and random in-plane orientation,which effectively scatter phonons across various wavelengths.As a result, the Ag_(2)Se films achieved an optimal ZTvalue of 0.73 at 363 K, suggesting substantial potential forfurther improvements. This research not only demonstrates astrategic method to manipulate the crystallographic orientationof Ag_(2)Se thin films but also opens up new possibilities fordeveloping high-performance thermoelectric materials.
基金the National Natural Science Foundation of China(52130203,92463310,52172232)the Basic and Applied Basic Research Foundation of Guangdong Province(2022B1515120005)。
