Background:Sargentodoxae Caulis(SC)is the vine stem of Sargentodoxa Cuneata(Oliv.)Rehd.&E.H.Wilson in C.S.Sargent,and it in traditional Chinese medicine has been known for promoting blood circulation and removing ...Background:Sargentodoxae Caulis(SC)is the vine stem of Sargentodoxa Cuneata(Oliv.)Rehd.&E.H.Wilson in C.S.Sargent,and it in traditional Chinese medicine has been known for promoting blood circulation and removing blood stasis as recorded in the ancient book“Illustrated Classics of Materia Medica”.It has been used effectively to treat blood stasis too in modern clinical practice.However,the anti-hyperlipidemia effect of SC is not fully understood.This paper aims at exploring the use of SC stems to improve the balance of blood lipids in the body,and its new role in treating hyperlipidemia.Methods:The effects of SC extract on hyperlipidemia were explored by combining lipidomics and gut microbiota.Secondly,we explored the potential mechanism of SC in treating hyperlipidemia by pathway analysis.Results:The results showed that the stem extract of SC could restore the physiological and biochemical indices of hyperlipidemia in mice,as well as repair the morphological and structural damage to tissues.Compared to the Model group,the SC extract significantly reduced the liver index,epididymal fat index,and Lee’s index.It also significantly decreased serum levels of total cholesterol,triglycerides,low-density lipoprotein cholesterol,peroxisome proliferator-activated receptor gamma(PPAR-γ),D-lactate,and free fatty acids,while significantly increasing the relative content of peroxisome proliferator-activated receptor alpha(PPAR-α).These changes were statistically significant.Non-targeted lipidomics,based on LC-MS,were utilized to investigate the lipid metabolism characteristics in serum,liver,and epididymal fat of the subjects.It was observed that,compared to the blank group,the Model group exhibited significant changes primarily in glycerol lipids and glycerophospholipids.The treatment group also displayed alterations in these lipids.A total of 38,81,and 27 differential lipids were identified in serum,liver,and epididymal fat samples,respectively.Among these,14 common differential lipids were found in both serum and liver samples,and their KEGG enrichment pathways were largely consistent.Among them,the sphingolipid signaling pathway and the glycerophospholipid metabolic pathway were identified as key metabolic pathways that were regulated.Our gut microbiota analysis revealed that SC diminishes the abundance of Actinobacteria by altering the cecal flora in mice.Conclusion:This alteration leads to the downregulation of genes involved in triglyceride metabolism,which in turn changes lipid processing and reduces triglyceride levels.Consequently,SC effectively combats hyperlipidemia.Notably,SC impacts key metabolic pathways,including the sphingolipid signaling and glycerophospholipid metabolism.These findings underscore SC’s therapeutic potential,positioning it as a promising alternative for reducing the health risks associated with hyperlipidemia.展开更多
Femtosecond laser pulses with GHz burst mode that consist of a series of trains of ultrashort laser pulses with a pulse interval of several hundred picoseconds offer distinct features in material processing that canno...Femtosecond laser pulses with GHz burst mode that consist of a series of trains of ultrashort laser pulses with a pulse interval of several hundred picoseconds offer distinct features in material processing that cannot be obtained by the conventional irradiation scheme of femtosecond laser pulses(single-pulse mode).However,most studies using the GHz burst mode femtosecond laser pulses focus on ablation of materials to achieve high-efficiency and high-quality material removal.In this study,we explore the ability of the GHz burst mode femtosecond laser processing to form laser-induced periodic surface structures(LIPSS)on silicon.It is well known that the direction of LIPSS formed by the single-pulse mode with linearly polarized laser pulses is typically perpendicular to the laser polarization direction.In contrast,we find that the GHz burst mode femtosecond laser(wavelength:1030 nm,intra-pulse duration:220 fs,intra-pulse interval time(intra-pulse repetition rate):205 ps(4.88 GHz),burst pulse repetition rate:200 kHz)creates unique two-dimensional(2D)LIPSS.We regard the formation mechanism of 2D LIPSS as the synergetic contribution of the electromagnetic mechanism and the hydrodynamic mechanism.Specifically,generation of hot spots with highly enhanced electric fields by the localized surface plasmon resonance of subsequent pulses in the bursts within the nanogrooves of one-dimensional LIPSS formed by the preceding pulses creates 2D LIPSS.Additionally,hydrodynamic instability including convection flow determines the final structure of 2D LIPSS.展开更多
Stretchable electronic sensing devices are defining the path toward wearable electronics. High-performance flexible strain sensors attached on clothing or human skin are required for potential applications in the ente...Stretchable electronic sensing devices are defining the path toward wearable electronics. High-performance flexible strain sensors attached on clothing or human skin are required for potential applications in the entertainment,health monitoring, and medical care sectors. In this work,conducting copper electrodes were fabricated onpolydimethylsiloxane as sensitive stretchable microsensors by integrating laser direct writing and transfer printing approaches. The copper electrode was reduced from copper salt using laser writing rather than the general approach of printing with pre-synthesized copper or copper oxide nanoparticles. An electrical resistivity of 96 l X cm was achieved on 40-lm-thick Cu electrodes on flexible substrates. The motion sensing functionality successfully demonstrated a high sensitivity and mechanical robustness.This in situ fabrication method leads to a path toward electronic devices on flexible substrates.展开更多
Ultra-short laser pulses possess many advantages for materials processing.Ultrafast laser has a significantly low thermal effect on the areas surrounding the focal point;therefore,it is a promising tool for micro-and ...Ultra-short laser pulses possess many advantages for materials processing.Ultrafast laser has a significantly low thermal effect on the areas surrounding the focal point;therefore,it is a promising tool for micro-and submicro-sized precision processing.In addition,the nonlinear multiphoton absorption phenomenon of focused ultra-short pulses provides a promising method for the fabrication of various structures on transparent material,such as glass and transparent polymers.A laser direct writing process was applied in the fabrication of high-performance three-dimensional(3D)structured multilayer microsupercapacitors(MSCs)on polymer substrates exhibiting a peak specific capacitance of 42.6 mF·cm^-2 at a current density of 0.1 mA·cm^-12.Furthermore,a flexible smart sensor array on a polymer substrate was fabricated for multi-flavor detection.Different surface treatments such as gold plating,reducedgraphene oxide(rGO)coating,and polyaniline(PANI)coating were accomplished for different measurement units.By applying principal component analysis(PCA),this sensing system showed a promising result for flavor detection.In addition,two-dimensional(2D)periodic metal nanostructures inside 3D glass microfluidic channels were developed by all-femtosecond-laser processing for real-time surfaceenhanced Raman spectroscopy(SERS).The processing mechanisms included laser ablation,laser reduction,and laser-induced surface nano-engineering.These works demonstrate the attractive potential of ultra-short pulsed laser for surface precision manufacturing.展开更多
Surface-enhanced Raman scattering(SERS),owing to its high sensitivity based on localized surface plasmon resonance of nanostructured metals,is recently attracting much attention to be used for biotechnology,such as ce...Surface-enhanced Raman scattering(SERS),owing to its high sensitivity based on localized surface plasmon resonance of nanostructured metals,is recently attracting much attention to be used for biotechnology,such as cell imaging and tumor therapy.On the other hand,the trace detection of bio-molecules with large molecular weight is still challenging because the troublesome treatment of SERS substrate using coupling or cross-linking agents is required.In this paper,we apply liquid interface assisted SERS(LI-SERS)method,which provides unique features of collection and self-immobilization of analyte molecules on the SERS substrate,to realize the label-free trace detection of bio-molecules with detection limits of pM~fM.Specifically,deoxyribonucleic acid(DNA)discrimination and quantitative detection ofβ-Amyloid(Aβ)in trace-concentration are demonstrated to illustrate the ultrahigh sensitivity and versatility of the LI-SERS method.The results suggest LI-SERS is promising for the early-stage diagnosis of diseases such as virus infection and Alzheimer's disease.展开更多
Surface-enhanced Raman scattering(SERS)techniques have rapidly advanced over the last two decades,permitting multidisciplinary trace analyses and the potential detection of single molecules.This paper provides a compr...Surface-enhanced Raman scattering(SERS)techniques have rapidly advanced over the last two decades,permitting multidisciplinary trace analyses and the potential detection of single molecules.This paper provides a comprehensive review of recent progress in strategies for the fabrication of highly sensitive SERS substrates,as a means of achieving sensing on the attomolar scale.The review examines widely used performance criteria,such as enhancement factors.In addition,femtosecond laser-based techniques are discussed as a versatile tool for the fabrication of SERS substrates.Several approaches for enhancing the performance of SERS sensing devices are also introduced,including photo-induced,transient,and liquid-interface assisted strategies.Finally,substrates for real-time sensing and biological applications are also reviewed to demonstrate the powerful analytical capabilities of these methods and the significant progress in SERS research.展开更多
基金supported by the Science and Technology Program of Tianjin in China(No.23ZYJDSS00030)the Public Applied Technology Research Project of Zhejiang Province(No.LGD22H090010)。
文摘Background:Sargentodoxae Caulis(SC)is the vine stem of Sargentodoxa Cuneata(Oliv.)Rehd.&E.H.Wilson in C.S.Sargent,and it in traditional Chinese medicine has been known for promoting blood circulation and removing blood stasis as recorded in the ancient book“Illustrated Classics of Materia Medica”.It has been used effectively to treat blood stasis too in modern clinical practice.However,the anti-hyperlipidemia effect of SC is not fully understood.This paper aims at exploring the use of SC stems to improve the balance of blood lipids in the body,and its new role in treating hyperlipidemia.Methods:The effects of SC extract on hyperlipidemia were explored by combining lipidomics and gut microbiota.Secondly,we explored the potential mechanism of SC in treating hyperlipidemia by pathway analysis.Results:The results showed that the stem extract of SC could restore the physiological and biochemical indices of hyperlipidemia in mice,as well as repair the morphological and structural damage to tissues.Compared to the Model group,the SC extract significantly reduced the liver index,epididymal fat index,and Lee’s index.It also significantly decreased serum levels of total cholesterol,triglycerides,low-density lipoprotein cholesterol,peroxisome proliferator-activated receptor gamma(PPAR-γ),D-lactate,and free fatty acids,while significantly increasing the relative content of peroxisome proliferator-activated receptor alpha(PPAR-α).These changes were statistically significant.Non-targeted lipidomics,based on LC-MS,were utilized to investigate the lipid metabolism characteristics in serum,liver,and epididymal fat of the subjects.It was observed that,compared to the blank group,the Model group exhibited significant changes primarily in glycerol lipids and glycerophospholipids.The treatment group also displayed alterations in these lipids.A total of 38,81,and 27 differential lipids were identified in serum,liver,and epididymal fat samples,respectively.Among these,14 common differential lipids were found in both serum and liver samples,and their KEGG enrichment pathways were largely consistent.Among them,the sphingolipid signaling pathway and the glycerophospholipid metabolic pathway were identified as key metabolic pathways that were regulated.Our gut microbiota analysis revealed that SC diminishes the abundance of Actinobacteria by altering the cecal flora in mice.Conclusion:This alteration leads to the downregulation of genes involved in triglyceride metabolism,which in turn changes lipid processing and reduces triglyceride levels.Consequently,SC effectively combats hyperlipidemia.Notably,SC impacts key metabolic pathways,including the sphingolipid signaling and glycerophospholipid metabolism.These findings underscore SC’s therapeutic potential,positioning it as a promising alternative for reducing the health risks associated with hyperlipidemia.
基金supported by MEXT Quantum Leap Flagship Program(MEXT Q-LEAP)Grant Number JPMXS0118067246.
文摘Femtosecond laser pulses with GHz burst mode that consist of a series of trains of ultrashort laser pulses with a pulse interval of several hundred picoseconds offer distinct features in material processing that cannot be obtained by the conventional irradiation scheme of femtosecond laser pulses(single-pulse mode).However,most studies using the GHz burst mode femtosecond laser pulses focus on ablation of materials to achieve high-efficiency and high-quality material removal.In this study,we explore the ability of the GHz burst mode femtosecond laser processing to form laser-induced periodic surface structures(LIPSS)on silicon.It is well known that the direction of LIPSS formed by the single-pulse mode with linearly polarized laser pulses is typically perpendicular to the laser polarization direction.In contrast,we find that the GHz burst mode femtosecond laser(wavelength:1030 nm,intra-pulse duration:220 fs,intra-pulse interval time(intra-pulse repetition rate):205 ps(4.88 GHz),burst pulse repetition rate:200 kHz)creates unique two-dimensional(2D)LIPSS.We regard the formation mechanism of 2D LIPSS as the synergetic contribution of the electromagnetic mechanism and the hydrodynamic mechanism.Specifically,generation of hot spots with highly enhanced electric fields by the localized surface plasmon resonance of subsequent pulses in the bursts within the nanogrooves of one-dimensional LIPSS formed by the preceding pulses creates 2D LIPSS.Additionally,hydrodynamic instability including convection flow determines the final structure of 2D LIPSS.
基金supported by National Natural Science Foundation of China (51575016)the Beijing Oversea High-Level Talent Project+1 种基金strategic research Grant (KZ20141000500, B-type) of Beijing Natural Science Foundation P.R. Chinathe support by the China Scholarship Council (20160654015) for his research stay at the Institute of Physical and Chemical Research,Wako, Japan
文摘Stretchable electronic sensing devices are defining the path toward wearable electronics. High-performance flexible strain sensors attached on clothing or human skin are required for potential applications in the entertainment,health monitoring, and medical care sectors. In this work,conducting copper electrodes were fabricated onpolydimethylsiloxane as sensitive stretchable microsensors by integrating laser direct writing and transfer printing approaches. The copper electrode was reduced from copper salt using laser writing rather than the general approach of printing with pre-synthesized copper or copper oxide nanoparticles. An electrical resistivity of 96 l X cm was achieved on 40-lm-thick Cu electrodes on flexible substrates. The motion sensing functionality successfully demonstrated a high sensitivity and mechanical robustness.This in situ fabrication method leads to a path toward electronic devices on flexible substrates.
基金the University of Tennessee Research Foundation and a grant from the National Natural Science Foundation of China(51575016).
文摘Ultra-short laser pulses possess many advantages for materials processing.Ultrafast laser has a significantly low thermal effect on the areas surrounding the focal point;therefore,it is a promising tool for micro-and submicro-sized precision processing.In addition,the nonlinear multiphoton absorption phenomenon of focused ultra-short pulses provides a promising method for the fabrication of various structures on transparent material,such as glass and transparent polymers.A laser direct writing process was applied in the fabrication of high-performance three-dimensional(3D)structured multilayer microsupercapacitors(MSCs)on polymer substrates exhibiting a peak specific capacitance of 42.6 mF·cm^-2 at a current density of 0.1 mA·cm^-12.Furthermore,a flexible smart sensor array on a polymer substrate was fabricated for multi-flavor detection.Different surface treatments such as gold plating,reducedgraphene oxide(rGO)coating,and polyaniline(PANI)coating were accomplished for different measurement units.By applying principal component analysis(PCA),this sensing system showed a promising result for flavor detection.In addition,two-dimensional(2D)periodic metal nanostructures inside 3D glass microfluidic channels were developed by all-femtosecond-laser processing for real-time surfaceenhanced Raman spectroscopy(SERS).The processing mechanisms included laser ablation,laser reduction,and laser-induced surface nano-engineering.These works demonstrate the attractive potential of ultra-short pulsed laser for surface precision manufacturing.
基金the Special Postdoctoral Researcher Program and Incentive Research Project of RIKEN.
文摘Surface-enhanced Raman scattering(SERS),owing to its high sensitivity based on localized surface plasmon resonance of nanostructured metals,is recently attracting much attention to be used for biotechnology,such as cell imaging and tumor therapy.On the other hand,the trace detection of bio-molecules with large molecular weight is still challenging because the troublesome treatment of SERS substrate using coupling or cross-linking agents is required.In this paper,we apply liquid interface assisted SERS(LI-SERS)method,which provides unique features of collection and self-immobilization of analyte molecules on the SERS substrate,to realize the label-free trace detection of bio-molecules with detection limits of pM~fM.Specifically,deoxyribonucleic acid(DNA)discrimination and quantitative detection ofβ-Amyloid(Aβ)in trace-concentration are demonstrated to illustrate the ultrahigh sensitivity and versatility of the LI-SERS method.The results suggest LI-SERS is promising for the early-stage diagnosis of diseases such as virus infection and Alzheimer's disease.
文摘Surface-enhanced Raman scattering(SERS)techniques have rapidly advanced over the last two decades,permitting multidisciplinary trace analyses and the potential detection of single molecules.This paper provides a comprehensive review of recent progress in strategies for the fabrication of highly sensitive SERS substrates,as a means of achieving sensing on the attomolar scale.The review examines widely used performance criteria,such as enhancement factors.In addition,femtosecond laser-based techniques are discussed as a versatile tool for the fabrication of SERS substrates.Several approaches for enhancing the performance of SERS sensing devices are also introduced,including photo-induced,transient,and liquid-interface assisted strategies.Finally,substrates for real-time sensing and biological applications are also reviewed to demonstrate the powerful analytical capabilities of these methods and the significant progress in SERS research.
