Abstract Using histochemistry technique, the effects of radiofrequency catheter ablation (RFCA) on the activities of LDH, SDH, CCO, and Ca^2+ ATPase of guinea pig ventricular myocytes were examined. In the ...Abstract Using histochemistry technique, the effects of radiofrequency catheter ablation (RFCA) on the activities of LDH, SDH, CCO, and Ca^2+ ATPase of guinea pig ventricular myocytes were examined. In the meanwhile, the histological changes were observed as Department of Cardiology, Tongji Hospital, Tongji Medical University. Wuhan 430030, China (Wang YG, Lu ZY) Department of Anatomy, Tongji Medical University, Wuhan 430030, China (Xiong XK) control. Radiofreqency energy (500 kHz) delivered was 20W×10s. The resultes were as follows: RFCA resulted in significant impairments in all the four kinds of enzymses but without statistical differences among their areas involved in this energy level, and there are no statistical significant differences when compared with those of histological lesion area. These findings showed consistency in areas of the histological and histochemical lesions resulted from RFCA.展开更多
Topological insulating states in 2-dimensional(2D)materials are ideal systems to study different types of quantized response signals due to their in gap metallic states.Very recently,the quantum spin Hall effect was d...Topological insulating states in 2-dimensional(2D)materials are ideal systems to study different types of quantized response signals due to their in gap metallic states.Very recently,the quantum spin Hall effect was discovered in monolayer TalrTe Via the observation of quantized longitudinal conductance that rarely exists in other 2D topological insulators.The nontrivial Z_(2)topological charges can exist at both charge neutrality point and the van Hove singularity point with correlation-effect-induced bandgap.On the basis of this model 2D material,we studied the switch of quantized signals between longitudinal conductance and transversal Hall conductance via tuning external magnetic field.In Z_(2)topological phase of monolayer TalrTe_(4),the zero Chern number can be understood as 1-1=O from the double band inversion from spinup and spin-down channels.After applying a magnetic field perpendicular to the plane,the Zeeman split changes the band order for one branch of the band inversion from spin-up and spin-down channels,along with a sign charge of the Berry phase.Then,the net Chern number of 1-1=0 is tuned to 1+1=2 or-1-1=-2 depending on the orientation of the magnetic field.The quantized signal not only provides another effective method for the verification of topological state in monolayer TalrTe_(4)but also offers a strategy for the utilization of the new quantum topological states based on switchable quantized responses.展开更多
Recent advancements in high-energy terahertz(THz)sources,driven by powerful laser systems,now enable the generation of ultrashort THz pulses with energies up to several millijoules,spanning frequencies from 1 to 30 TH...Recent advancements in high-energy terahertz(THz)sources,driven by powerful laser systems,now enable the generation of ultrashort THz pulses with energies up to several millijoules,spanning frequencies from 1 to 30 THz.A key breakthrough is developing a reliable single-shot detection method,essential for measuring the electric field of these broadband,low-repetition-rate pulses,which is vital for exploring the complex dynamics of THz emission and studying extreme nonlinear material responses in this range.Existing detection methods have been limited to lower frequencies.Here,we introduce the first potentially single-shot-capable THz detection technique for capturing ultra-broadband waveforms.Utilizing a 1-μm-thick SiN detection chip,we exploit THz field-induced second harmonic generation to achieve real-time monitoring of THz waveforms with frequency content up to 30 THz.By adjusting the angle between the THz and optical probe beams,we can fine-tune the detection window for enhanced flexibility.Our novel THz detector is ideally suited for high-energy,low-repetition-rate sources,unlocking new frontiers in THz research.展开更多
In the context of global climate change and the increasing need to study plant response to drought,there is a demand for easily,rapidly,and remotely measurable parameters that sensitively reflect leaf water status.Par...In the context of global climate change and the increasing need to study plant response to drought,there is a demand for easily,rapidly,and remotely measurable parameters that sensitively reflect leaf water status.Parameters with this potential include those derived from leaf spectral reflectance(R)and chlorophyll fluorescence.As each of these methods probes completely different leaf characteristics,their sensitivity to water loss may differ in different plant species and/or under different circumstances,making it difficult to choose the most appropriate method for estimating water status in a given situation.Here,we present a simple comparative analysis to facilitate this choice for leaf-level measurements.Using desiccation of tobacco(Nicotiana tabacum L.cv.Samsun)and barley(Hordeum vulgare L.cv.Bojos)leaves as a model case,we measured parameters of spectral R and chlorophyll fluorescence and then evaluated and compared their applicability by means of introduced coefficients(coefficient of reliability,sensitivity,and inaccuracy).This comparison showed that,in our case,chlorophyll fluorescence was more reliable and universal than spectral R.Nevertheless,it is most appropriate to use both methods simultaneously,as the specific ranking of their parameters according to the coefficient of reliability may indicate a specific scenario of changes in desiccating leaves.展开更多
Exercise is widely recognized for its extensive health benefits,ranging from cardiovascular protection to improved metabolic function and immune regulation.However,exercise-induced physiological adaptations are highly...Exercise is widely recognized for its extensive health benefits,ranging from cardiovascular protection to improved metabolic function and immune regulation.However,exercise-induced physiological adaptations are highly dependent on duration and frequency(Sanford et al.,2020).While acute exercise(AE)rapidly activates metabolic and immune responses(Mo Tr PAC Study Group et al.,2024),long-term exercise(LE)brings profound and systemic benefits,such as enhanced immunity,tissue regeneration,improved neuroplasticity,and cognitive function,optimized skeletal muscle metabolism and insulin sensitivity,and alleviation of chronic inflammation(De Miguel et al.,2021).展开更多
文摘Abstract Using histochemistry technique, the effects of radiofrequency catheter ablation (RFCA) on the activities of LDH, SDH, CCO, and Ca^2+ ATPase of guinea pig ventricular myocytes were examined. In the meanwhile, the histological changes were observed as Department of Cardiology, Tongji Hospital, Tongji Medical University. Wuhan 430030, China (Wang YG, Lu ZY) Department of Anatomy, Tongji Medical University, Wuhan 430030, China (Xiong XK) control. Radiofreqency energy (500 kHz) delivered was 20W×10s. The resultes were as follows: RFCA resulted in significant impairments in all the four kinds of enzymses but without statistical differences among their areas involved in this energy level, and there are no statistical significant differences when compared with those of histological lesion area. These findings showed consistency in areas of the histological and histochemical lesions resulted from RFCA.
基金supported by the Foundation from Liaoning Province(grant no.XLYC2203080)the National Natural Science Foundation of China(grant nos.52271016 and 52188101)the National Key R&D Program of China(grant no.2021YFB3501503)。
文摘Topological insulating states in 2-dimensional(2D)materials are ideal systems to study different types of quantized response signals due to their in gap metallic states.Very recently,the quantum spin Hall effect was discovered in monolayer TalrTe Via the observation of quantized longitudinal conductance that rarely exists in other 2D topological insulators.The nontrivial Z_(2)topological charges can exist at both charge neutrality point and the van Hove singularity point with correlation-effect-induced bandgap.On the basis of this model 2D material,we studied the switch of quantized signals between longitudinal conductance and transversal Hall conductance via tuning external magnetic field.In Z_(2)topological phase of monolayer TalrTe_(4),the zero Chern number can be understood as 1-1=O from the double band inversion from spinup and spin-down channels.After applying a magnetic field perpendicular to the plane,the Zeeman split changes the band order for one branch of the band inversion from spin-up and spin-down channels,along with a sign charge of the Berry phase.Then,the net Chern number of 1-1=0 is tuned to 1+1=2 or-1-1=-2 depending on the orientation of the magnetic field.The quantized signal not only provides another effective method for the verification of topological state in monolayer TalrTe_(4)but also offers a strategy for the utilization of the new quantum topological states based on switchable quantized responses.
基金supported by the Independent Research Fund Denmark(project THz-GRIP:2035-00365B).
文摘Recent advancements in high-energy terahertz(THz)sources,driven by powerful laser systems,now enable the generation of ultrashort THz pulses with energies up to several millijoules,spanning frequencies from 1 to 30 THz.A key breakthrough is developing a reliable single-shot detection method,essential for measuring the electric field of these broadband,low-repetition-rate pulses,which is vital for exploring the complex dynamics of THz emission and studying extreme nonlinear material responses in this range.Existing detection methods have been limited to lower frequencies.Here,we introduce the first potentially single-shot-capable THz detection technique for capturing ultra-broadband waveforms.Utilizing a 1-μm-thick SiN detection chip,we exploit THz field-induced second harmonic generation to achieve real-time monitoring of THz waveforms with frequency content up to 30 THz.By adjusting the angle between the THz and optical probe beams,we can fine-tune the detection window for enhanced flexibility.Our novel THz detector is ideally suited for high-energy,low-repetition-rate sources,unlocking new frontiers in THz research.
基金supported from the project TowArds Next GENeration Crops(TANGENC),reg.no.CZ.02.01.01/00/22_008/0004581,of the ERDF Programme Johannes Amos Comenius.
文摘In the context of global climate change and the increasing need to study plant response to drought,there is a demand for easily,rapidly,and remotely measurable parameters that sensitively reflect leaf water status.Parameters with this potential include those derived from leaf spectral reflectance(R)and chlorophyll fluorescence.As each of these methods probes completely different leaf characteristics,their sensitivity to water loss may differ in different plant species and/or under different circumstances,making it difficult to choose the most appropriate method for estimating water status in a given situation.Here,we present a simple comparative analysis to facilitate this choice for leaf-level measurements.Using desiccation of tobacco(Nicotiana tabacum L.cv.Samsun)and barley(Hordeum vulgare L.cv.Bojos)leaves as a model case,we measured parameters of spectral R and chlorophyll fluorescence and then evaluated and compared their applicability by means of introduced coefficients(coefficient of reliability,sensitivity,and inaccuracy).This comparison showed that,in our case,chlorophyll fluorescence was more reliable and universal than spectral R.Nevertheless,it is most appropriate to use both methods simultaneously,as the specific ranking of their parameters according to the coefficient of reliability may indicate a specific scenario of changes in desiccating leaves.
基金supported by the National Natural Science Foundation of China(32271226,31971097,32070751 and 31871435)the National Key Research and Development Program of China(2020YFA0803801)+1 种基金Shanghai Municipal Science and Technology Committee of Shanghai outstanding academic leaders plan(21XD1403200)the Key Laboratory of Exercise and Health Sciences(Shanghai University of Sport),Ministry of Education。
文摘Exercise is widely recognized for its extensive health benefits,ranging from cardiovascular protection to improved metabolic function and immune regulation.However,exercise-induced physiological adaptations are highly dependent on duration and frequency(Sanford et al.,2020).While acute exercise(AE)rapidly activates metabolic and immune responses(Mo Tr PAC Study Group et al.,2024),long-term exercise(LE)brings profound and systemic benefits,such as enhanced immunity,tissue regeneration,improved neuroplasticity,and cognitive function,optimized skeletal muscle metabolism and insulin sensitivity,and alleviation of chronic inflammation(De Miguel et al.,2021).
