From the ethanol extract of the whole plant of Boschniakia himalaica Hook. f. et. Thoms, a new and two known lignans have been isolated and identified as 7-methoxypinoresino 1, pinoresinol 2, and pinoresinol-O--D-gluc...From the ethanol extract of the whole plant of Boschniakia himalaica Hook. f. et. Thoms, a new and two known lignans have been isolated and identified as 7-methoxypinoresino 1, pinoresinol 2, and pinoresinol-O--D-glucopyranoside 3 respectively. Their structures have been established by spectroscopic methods.展开更多
The BmSuc1 gene,which encodes a novel animal-typeβ-fructofuranosidase(EC 3.2.1.26),was first cloned and identified in silkworm(Bombyx mori).As an essential sucrase,the activity of BmSUC1 is unaffected by alkaloidal s...The BmSuc1 gene,which encodes a novel animal-typeβ-fructofuranosidase(EC 3.2.1.26),was first cloned and identified in silkworm(Bombyx mori).As an essential sucrase,the activity of BmSUC1 is unaffected by alkaloidal sugar mimics in mulberry leaves.This enzyme may also directly regulate the degree of sucrose hydrolysis in the silkworm midgut.In addition,BmSUC1 is involved in the synthesis of sericin 1 in the silk gland tissue.However,the mechanism underlying the regulation of BmSuc1 transcription remains unclear.In this study,we analyzed the BmSuc1 promoter activity using a dual-luciferase reporter assay and identified 4 regions that are critical for transcriptional activation.The gene encoding a predicted transcription factor(TATA-box-binding protein;BmTBP)capable of binding to the core promoter regions was cloned.A quantitative real-time polymerase chain reaction analysis indicated the gene was highly expressed in the midgut.Downregulating BmTBP expression via RNA interference decreased the expression of BmSuc1 at the transcript and protein levels.An electrophoretic mobility shift analysis and chromatin immunoprecipitation indicated that BmTBP can bind to the TATA-box cis-regulatory element in the BmSuc1 promoter.Furthermore,a bioinformatics-based analysis and a far-western blot revealed the interaction between BmTBP and another transcription factor(BmTfIIA-S).The luciferase reporter gene assay results confirmed that the BmTBP–BmTfIIA-S complex increases the BmSuc1 promoter activity.Considered together,these findings suggest that BmTBP regulates BmSuc1 expression through its interaction with BmTfIIA-S.展开更多
Video steganography plays an important role in secret communication that conceals a secret video in a cover video by perturbing the value of pixels in the cover frames.Imperceptibility is the first and foremost requir...Video steganography plays an important role in secret communication that conceals a secret video in a cover video by perturbing the value of pixels in the cover frames.Imperceptibility is the first and foremost requirement of any steganographic approach.Inspired by the fact that human eyes perceive pixel perturbation differently in different video areas,a novel effective and efficient Deeply‐Recursive Attention Network(DRANet)for video steganography to find suitable areas for information hiding via modelling spatio‐temporal attention is proposed.The DRANet mainly contains two important components,a Non‐Local Self‐Attention(NLSA)block and a Non‐Local Co‐Attention(NLCA)block.Specifically,the NLSA block can select the cover frame areas which are suitable for hiding by computing the correlations among inter‐and intra‐cover frames.The NLCA block aims to effectively produce the enhanced representations of the secret frames to enhance the robustness of the model and alleviate the influence of different areas in the secret video.Furthermore,the DRANet reduces the model parameters by performing similar operations on the different frames within an input video recursively.Experimental results show the proposed DRANet achieves better performance with fewer parameters than the state‐of‐the‐art competitors.展开更多
Two new diacetylated flavonol glycosides, kampferol-3-O--3? 6?diacetylglucopyrano- side and quercetin-3-O--3? 6?diacetylglucopyranoside were isolated from knoxia corymbosa. Their structures were elucidated by spectro...Two new diacetylated flavonol glycosides, kampferol-3-O--3? 6?diacetylglucopyrano- side and quercetin-3-O--3? 6?diacetylglucopyranoside were isolated from knoxia corymbosa. Their structures were elucidated by spectroscopic evidents.展开更多
Phytochemical investigation of Lagotis yunnanensis led to the isolation and identification of a new iridoid glucoside 1, named as 10-O-(3,4-dimethoxy-(E)-cinnamoyl)aucubin. Its structure was elucidated by spectroscopi...Phytochemical investigation of Lagotis yunnanensis led to the isolation and identification of a new iridoid glucoside 1, named as 10-O-(3,4-dimethoxy-(E)-cinnamoyl)aucubin. Its structure was elucidated by spectroscopie methods.展开更多
Wireless Machine to Machine （M2M） communications enable ubiquitous sensing, controlling, and acting via sensors, actuators, and actors. Reliability and security are of foremost importance in wireless M2M systems. A ...Wireless Machine to Machine （M2M） communications enable ubiquitous sensing, controlling, and acting via sensors, actuators, and actors. Reliability and security are of foremost importance in wireless M2M systems. A simple, target distinguishing attack can result in M2M＇s failure. This paper presents a Reliable and SEcure scheme, RISE, which is a package of policies that guarantee the reliability of data （including sensor reports and actuator instructions） and devices （including sensors, actuators, and actors）. The data reliability is improved by four algorithms, ChooseMedian, ChooseMost, ChooseNearest, and Trust-based Enhancement. Report attainability is improved via m repeat-sending and n multiple-reporting algorithms. Device reliability is guaranteed by device-indistinguishability, which comprises data-indistinguishability and behavior-indistinguishability. The security requirements are formally defined, and the security analysis proves the soundness and completeness of the scheme,展开更多
This study investigated the production of M140, aligned multi-walled carbon nanotubes (A-MWNTs) reinforced M140 composites (A-MWNTs-M140) and their mechanical properties including their compressive and bending propert...This study investigated the production of M140, aligned multi-walled carbon nanotubes (A-MWNTs) reinforced M140 composites (A-MWNTs-M140) and their mechanical properties including their compressive and bending properties as well as their microstructure characteristic of bend fracture surface. M140 was first produced by speed change mixing technics with commercial materials, water-bath curing at normal temperature. In addition, two different A-MWNTs dispersions including carbonyl disper- sions of A-MWNTs (C-A-MWNTs) and aqueous dispersions of A-MWNTs (A-A-MWNTs) with the addition of 0.01wt% A-MWNTs were utilized to obtain enhanced mechanical properties with respect to plain M140. The results indicated that the use of A-MWNTs dispersions allows increasing compressive strength and flexural strength by 8.4% and 5.4%, respectively for the C-A-MWNTs-M140, and by 15.9% and 20.7% for the A-A-MWNTs-M140, respectively. The SEM and EPMA examinations of fracture surface also showed that the bond interface between the nanotubes and matrix is moderate and the main reinforcing mechanisms are microfilling effect, CNTs pull-out and debond. The aqueous dispersion of A-MWNTs is an appropriate method and is more compatible with the M140.展开更多
Network coding can improve network efficiency by extending copy-and-forward paradigm to code-and- forward paradigm. It thus imposes a security problem called pollution attack that some network coding or forwarding nod...Network coding can improve network efficiency by extending copy-and-forward paradigm to code-and- forward paradigm. It thus imposes a security problem called pollution attack that some network coding or forwarding nodes may intentionally fabricate, modify, forge, or drop packets. Recently, many authentication methods are proposed to guarantee the correctness of encoding and forwarding results via the verification from receivers. Those methods include homomorphic hashing, homomorphic message authentication code, and homomorphic signature. However, those schemes result in expensive computation overhead due to the homomorphic cryptographic primitives, so that those methods will not be able to work in most applications that confront resource constraints. In this paper, we propose an ultra-lightweight checking protocol to guarantee the secure network coding without any homomorphic cryptographic primitives. The extensive analysis proofs that it has following advantages： the least security assumption for intermediate nodes, the least cryptographic primitive requirement, ultra-lightweight computation, flexible message length with probably proof, and minimal rounds in terms of message exchanging.展开更多
A new phytosterone named passionsterone 1 has been isolated from the roots of Passiflora wilsonii, along with the known compound 24R-ethyl-5 α-cholestane-3 β ,6 a -diol 2. The structure of passionsterone 1 was eluci...A new phytosterone named passionsterone 1 has been isolated from the roots of Passiflora wilsonii, along with the known compound 24R-ethyl-5 α-cholestane-3 β ,6 a -diol 2. The structure of passionsterone 1 was elucidated as 24R-ethyl-5 α -cholestane-3 β,6 α-diol-23-one by spectroscopic means.展开更多
Two new iridoid glucosides 1 and 2, 10-O-(3, 4-dimethoxy-(E)-cinnamoyl)catalpol and 10-O-(3, 4-dimethoxy-(Z)-cinnamoyl)catalpol, were isolated from Lagotis yunnanensis. Their structures were elucidated by spectroscop...Two new iridoid glucosides 1 and 2, 10-O-(3, 4-dimethoxy-(E)-cinnamoyl)catalpol and 10-O-(3, 4-dimethoxy-(Z)-cinnamoyl)catalpol, were isolated from Lagotis yunnanensis. Their structures were elucidated by spectroscopic methods.展开更多
Abstract: Schisandra rubriflora Rehd. et Wils. is a traditional Chinese medicine. To search for new and bioactive components from traditional Chinese medicines and provide scientific evidence for taxonomy, the chemica...Abstract: Schisandra rubriflora Rehd. et Wils. is a traditional Chinese medicine. To search for new and bioactive components from traditional Chinese medicines and provide scientific evidence for taxonomy, the chemical constituents of the plant were investigated by various column chromatography methods (silica gel, Sephadex LH-20, and RP-18). From the aerial parts of S. rubriflora, three new megastigmane glycosides, namely (3S, 5R, 6S, 9R)-megastigmane-3, 9-diol 3-O-[α-L-arabionfuranosyl-(1→6)-β-D-glucopyranoside] (1), 7-megastigmene-3-ol-9-one 3-O-[α-L-arabionfuranosyl-(1→6)-β-D-glucopyranoside] (2), and megastigmane-3α, 4β, 9σ-triol 3-O-β-D-glucopyranoside (3), along with 14 known compounds, were isolated. The structures of the new compounds were elucidated by a combination of spectroscopic and chemical methods.展开更多
OBJECTIVE To study the treatment effect of Gastrodia elata and Uncaria rhynchophylla water extract(GUW)against cerebral ischemia,and the metabolomic profile of cerebrospinal fluid in GUW treated cerebral ischemia in r...OBJECTIVE To study the treatment effect of Gastrodia elata and Uncaria rhynchophylla water extract(GUW)against cerebral ischemia,and the metabolomic profile of cerebrospinal fluid in GUW treated cerebral ischemia in rat model.METHODS Middle cerebral artery occlusion was performed in male SD rat.GUW or control(PBS)was administered orally for 7d post-operationally.At day 7,the brain of the rat was harvested.The infarct volume of the brain was measured after TTC staining.The brain was subjected to H&E and cresyl violet staining in histological analysis.The cerebrospinal fluid(CSF)of another set of animals was aspirated.The CSF samples were labeled with 13 C-dansyl and 12C-dansyl chloride.The reaction mixture was put into liquid chromatography Fourier-transform ion cyclotron resonance mass spectrometry for analysis of the CSF metabolome.Multivariate statistical analysis will be carried out to determine the differences of metabolomic profile in CSF of GUW versus control group.RESULTS After GUW treatment,the neurological deficit score was significantly improved from day 3 to 7(P<0.001).GUW treated group significantly reduced 55.7%infarct volume on MCAO rats in TTC stained brain slices(P<0.001)and preserved brain histological structure observed in H&E and cresyl violet staining.On the other hand,according to various statistical analyses to compare CSF metabolite in the GUW and control group,volcano plot analysis showed 48 metabolites(P<0.001);OPLS-DA analysis showed 129 metabolites(VIP score >2.0)and 45 metabolites in ROC curve analysis.Among identified metabolites,L-aspartic acid(60%)and glycine(62%)decreased in GUW while threoninyl-alanine increased by 1.6 fold significantly.CONCLUSION GUW ameliorated cerebral ischemic injury,and the metabolomic approach may be a potential means to find biomarker of the Chinese medicine treatment on cerebral ischemia.展开更多
To solve engineering problems restricting development of China's sorghum industry in the whole chain,this paper firstly introduces functions of sorghum industry to national economic and social development.Then,it ...To solve engineering problems restricting development of China's sorghum industry in the whole chain,this paper firstly introduces functions of sorghum industry to national economic and social development.Then,it analyzes current situations of engineering research of sorghum industry.Finally,it discusses countermeasures for engineering research of sorghum industrial development.On the basis of current situations,it proposes 7 pertinent countermeasures.(i)Collection and storage of sorghum germplasm resource;(ii)Innovation on germplasm resource for sorghum breeding;(iii)Seed selection for new variety of special sorghum;(iv)Integrated innovation on high yield,high quality and high efficient cultivation technology;(v)Research and development of integrated prevention and control technology for disease,pests and weeds;(vi)Improvement in technological extension service system;(vii)Research of sorghum deep processing and use technology.It is intended to promote rapid,sustainable and healthy development of sorghum industry in China.展开更多
Two new flavonol glycosides (1 and 2) together with two known flavonoides (3 and 4), were isolated from the whole plant of Knoxia corymbosa willd. The structures of 1 and 2 were elucidated as kaempferol-7-O-α-L-arabi...Two new flavonol glycosides (1 and 2) together with two known flavonoides (3 and 4), were isolated from the whole plant of Knoxia corymbosa willd. The structures of 1 and 2 were elucidated as kaempferol-7-O-α-L-arabinosyl-3-O-β-D-6'-acetylglucopyranoside and kaempferol -7-O-α-L-arabinosyl-3-O-β-D-3',6'-diacetylglucopyranoside respectively.展开更多
Entropic contribution to the interaction parameter (?) in the model incompressible polymer/oligomer system iscalculated by the lattice cluster theory(LCT).It is found that in the oligomer solvent,there exists a wide c...Entropic contribution to the interaction parameter (?) in the model incompressible polymer/oligomer system iscalculated by the lattice cluster theory(LCT).It is found that in the oligomer solvent,there exists a wide concentration rangethat the non-combinatorial“entropic interaction”term (?)φ_1φ_2 perceptibly counteracts the mean field combinary entropy△S_(MF).With the increase of the solvent size,both (?) and the ratio (?)φ_1φ_2/△S_(MF) first reach their maximum and finallybecome trivially to zero.It is worth noting that no any demixing was found in the current calculation.This makes thecontroversial idea“entropically driven demixing”even elusive.However,we propose that further work on compressiblepolymer solution with structured monomer will witness the demixing owning to an increased configurational correlation.展开更多
文摘From the ethanol extract of the whole plant of Boschniakia himalaica Hook. f. et. Thoms, a new and two known lignans have been isolated and identified as 7-methoxypinoresino 1, pinoresinol 2, and pinoresinol-O--D-glucopyranoside 3 respectively. Their structures have been established by spectroscopic methods.
基金supported by National Natural Science Foundation of China(Grant No.31872423)the International Science&Technology Cooperation Plan of Anhui Province(Grant No.2022h11020020)the Innovative Research Groups of Anhui Agricultural University(Grant No.ANRC2019032)to Y.Meng.
文摘The BmSuc1 gene,which encodes a novel animal-typeβ-fructofuranosidase(EC 3.2.1.26),was first cloned and identified in silkworm(Bombyx mori).As an essential sucrase,the activity of BmSUC1 is unaffected by alkaloidal sugar mimics in mulberry leaves.This enzyme may also directly regulate the degree of sucrose hydrolysis in the silkworm midgut.In addition,BmSUC1 is involved in the synthesis of sericin 1 in the silk gland tissue.However,the mechanism underlying the regulation of BmSuc1 transcription remains unclear.In this study,we analyzed the BmSuc1 promoter activity using a dual-luciferase reporter assay and identified 4 regions that are critical for transcriptional activation.The gene encoding a predicted transcription factor(TATA-box-binding protein;BmTBP)capable of binding to the core promoter regions was cloned.A quantitative real-time polymerase chain reaction analysis indicated the gene was highly expressed in the midgut.Downregulating BmTBP expression via RNA interference decreased the expression of BmSuc1 at the transcript and protein levels.An electrophoretic mobility shift analysis and chromatin immunoprecipitation indicated that BmTBP can bind to the TATA-box cis-regulatory element in the BmSuc1 promoter.Furthermore,a bioinformatics-based analysis and a far-western blot revealed the interaction between BmTBP and another transcription factor(BmTfIIA-S).The luciferase reporter gene assay results confirmed that the BmTBP–BmTfIIA-S complex increases the BmSuc1 promoter activity.Considered together,these findings suggest that BmTBP regulates BmSuc1 expression through its interaction with BmTfIIA-S.
基金supported in part by NSFC(62002320,U19B2043,61672456)the Key R&D Program of Zhejiang Province,China(2021C01119).
文摘Video steganography plays an important role in secret communication that conceals a secret video in a cover video by perturbing the value of pixels in the cover frames.Imperceptibility is the first and foremost requirement of any steganographic approach.Inspired by the fact that human eyes perceive pixel perturbation differently in different video areas,a novel effective and efficient Deeply‐Recursive Attention Network(DRANet)for video steganography to find suitable areas for information hiding via modelling spatio‐temporal attention is proposed.The DRANet mainly contains two important components,a Non‐Local Self‐Attention(NLSA)block and a Non‐Local Co‐Attention(NLCA)block.Specifically,the NLSA block can select the cover frame areas which are suitable for hiding by computing the correlations among inter‐and intra‐cover frames.The NLCA block aims to effectively produce the enhanced representations of the secret frames to enhance the robustness of the model and alleviate the influence of different areas in the secret video.Furthermore,the DRANet reduces the model parameters by performing similar operations on the different frames within an input video recursively.Experimental results show the proposed DRANet achieves better performance with fewer parameters than the state‐of‐the‐art competitors.
文摘Two new diacetylated flavonol glycosides, kampferol-3-O--3? 6?diacetylglucopyrano- side and quercetin-3-O--3? 6?diacetylglucopyranoside were isolated from knoxia corymbosa. Their structures were elucidated by spectroscopic evidents.
文摘Phytochemical investigation of Lagotis yunnanensis led to the isolation and identification of a new iridoid glucoside 1, named as 10-O-(3,4-dimethoxy-(E)-cinnamoyl)aucubin. Its structure was elucidated by spectroscopie methods.
基金supported by the National Natural Science Foundation of China(No.61170217)the Open Research Fund from the Shandong Provincial Key Laboratory of Computer Network(No.SDKLCN-2011-01)Fundamental Research Funds for the Central Universities,China University of Geosciences(Wuhan)(No.110109)
文摘Wireless Machine to Machine （M2M） communications enable ubiquitous sensing, controlling, and acting via sensors, actuators, and actors. Reliability and security are of foremost importance in wireless M2M systems. A simple, target distinguishing attack can result in M2M＇s failure. This paper presents a Reliable and SEcure scheme, RISE, which is a package of policies that guarantee the reliability of data （including sensor reports and actuator instructions） and devices （including sensors, actuators, and actors）. The data reliability is improved by four algorithms, ChooseMedian, ChooseMost, ChooseNearest, and Trust-based Enhancement. Report attainability is improved via m repeat-sending and n multiple-reporting algorithms. Device reliability is guaranteed by device-indistinguishability, which comprises data-indistinguishability and behavior-indistinguishability. The security requirements are formally defined, and the security analysis proves the soundness and completeness of the scheme,
基金Supported by the National Natural Science Foundation of China(Grant No.50438010)
文摘This study investigated the production of M140, aligned multi-walled carbon nanotubes (A-MWNTs) reinforced M140 composites (A-MWNTs-M140) and their mechanical properties including their compressive and bending properties as well as their microstructure characteristic of bend fracture surface. M140 was first produced by speed change mixing technics with commercial materials, water-bath curing at normal temperature. In addition, two different A-MWNTs dispersions including carbonyl disper- sions of A-MWNTs (C-A-MWNTs) and aqueous dispersions of A-MWNTs (A-A-MWNTs) with the addition of 0.01wt% A-MWNTs were utilized to obtain enhanced mechanical properties with respect to plain M140. The results indicated that the use of A-MWNTs dispersions allows increasing compressive strength and flexural strength by 8.4% and 5.4%, respectively for the C-A-MWNTs-M140, and by 15.9% and 20.7% for the A-A-MWNTs-M140, respectively. The SEM and EPMA examinations of fracture surface also showed that the bond interface between the nanotubes and matrix is moderate and the main reinforcing mechanisms are microfilling effect, CNTs pull-out and debond. The aqueous dispersion of A-MWNTs is an appropriate method and is more compatible with the M140.
基金Supported by the Open Research Fund from the Shandong Provincial Key Laboratory of Computer Networks (No.SDKLCN-2011-01)the Fundamental Research Funds for the Central Universities, China University of Geosciences(Wuhan) (Nos. 110109 and 090109)the National Natural Science Foundation of China (No. 61170217)
文摘Network coding can improve network efficiency by extending copy-and-forward paradigm to code-and- forward paradigm. It thus imposes a security problem called pollution attack that some network coding or forwarding nodes may intentionally fabricate, modify, forge, or drop packets. Recently, many authentication methods are proposed to guarantee the correctness of encoding and forwarding results via the verification from receivers. Those methods include homomorphic hashing, homomorphic message authentication code, and homomorphic signature. However, those schemes result in expensive computation overhead due to the homomorphic cryptographic primitives, so that those methods will not be able to work in most applications that confront resource constraints. In this paper, we propose an ultra-lightweight checking protocol to guarantee the secure network coding without any homomorphic cryptographic primitives. The extensive analysis proofs that it has following advantages： the least security assumption for intermediate nodes, the least cryptographic primitive requirement, ultra-lightweight computation, flexible message length with probably proof, and minimal rounds in terms of message exchanging.
文摘A new phytosterone named passionsterone 1 has been isolated from the roots of Passiflora wilsonii, along with the known compound 24R-ethyl-5 α-cholestane-3 β ,6 a -diol 2. The structure of passionsterone 1 was elucidated as 24R-ethyl-5 α -cholestane-3 β,6 α-diol-23-one by spectroscopic means.
文摘Two new iridoid glucosides 1 and 2, 10-O-(3, 4-dimethoxy-(E)-cinnamoyl)catalpol and 10-O-(3, 4-dimethoxy-(Z)-cinnamoyl)catalpol, were isolated from Lagotis yunnanensis. Their structures were elucidated by spectroscopic methods.
文摘Abstract: Schisandra rubriflora Rehd. et Wils. is a traditional Chinese medicine. To search for new and bioactive components from traditional Chinese medicines and provide scientific evidence for taxonomy, the chemical constituents of the plant were investigated by various column chromatography methods (silica gel, Sephadex LH-20, and RP-18). From the aerial parts of S. rubriflora, three new megastigmane glycosides, namely (3S, 5R, 6S, 9R)-megastigmane-3, 9-diol 3-O-[α-L-arabionfuranosyl-(1→6)-β-D-glucopyranoside] (1), 7-megastigmene-3-ol-9-one 3-O-[α-L-arabionfuranosyl-(1→6)-β-D-glucopyranoside] (2), and megastigmane-3α, 4β, 9σ-triol 3-O-β-D-glucopyranoside (3), along with 14 known compounds, were isolated. The structures of the new compounds were elucidated by a combination of spectroscopic and chemical methods.
基金The project supported by the Health and Medical Research Fund,Hong Kong(11120381)
文摘OBJECTIVE To study the treatment effect of Gastrodia elata and Uncaria rhynchophylla water extract(GUW)against cerebral ischemia,and the metabolomic profile of cerebrospinal fluid in GUW treated cerebral ischemia in rat model.METHODS Middle cerebral artery occlusion was performed in male SD rat.GUW or control(PBS)was administered orally for 7d post-operationally.At day 7,the brain of the rat was harvested.The infarct volume of the brain was measured after TTC staining.The brain was subjected to H&E and cresyl violet staining in histological analysis.The cerebrospinal fluid(CSF)of another set of animals was aspirated.The CSF samples were labeled with 13 C-dansyl and 12C-dansyl chloride.The reaction mixture was put into liquid chromatography Fourier-transform ion cyclotron resonance mass spectrometry for analysis of the CSF metabolome.Multivariate statistical analysis will be carried out to determine the differences of metabolomic profile in CSF of GUW versus control group.RESULTS After GUW treatment,the neurological deficit score was significantly improved from day 3 to 7(P<0.001).GUW treated group significantly reduced 55.7%infarct volume on MCAO rats in TTC stained brain slices(P<0.001)and preserved brain histological structure observed in H&E and cresyl violet staining.On the other hand,according to various statistical analyses to compare CSF metabolite in the GUW and control group,volcano plot analysis showed 48 metabolites(P<0.001);OPLS-DA analysis showed 129 metabolites(VIP score >2.0)and 45 metabolites in ROC curve analysis.Among identified metabolites,L-aspartic acid(60%)and glycine(62%)decreased in GUW while threoninyl-alanine increased by 1.6 fold significantly.CONCLUSION GUW ameliorated cerebral ischemic injury,and the metabolomic approach may be a potential means to find biomarker of the Chinese medicine treatment on cerebral ischemia.
基金Supported by Project for Extension of Scientific and Technological Achievement in Shanxi Province(2011071005)Special Project for Construction of Modern Agricultural Industrial Technology SystemKey Project of Shanxi Academy of Agricultural Sciences(YZD1114)
文摘To solve engineering problems restricting development of China's sorghum industry in the whole chain,this paper firstly introduces functions of sorghum industry to national economic and social development.Then,it analyzes current situations of engineering research of sorghum industry.Finally,it discusses countermeasures for engineering research of sorghum industrial development.On the basis of current situations,it proposes 7 pertinent countermeasures.(i)Collection and storage of sorghum germplasm resource;(ii)Innovation on germplasm resource for sorghum breeding;(iii)Seed selection for new variety of special sorghum;(iv)Integrated innovation on high yield,high quality and high efficient cultivation technology;(v)Research and development of integrated prevention and control technology for disease,pests and weeds;(vi)Improvement in technological extension service system;(vii)Research of sorghum deep processing and use technology.It is intended to promote rapid,sustainable and healthy development of sorghum industry in China.
文摘Two new flavonol glycosides (1 and 2) together with two known flavonoides (3 and 4), were isolated from the whole plant of Knoxia corymbosa willd. The structures of 1 and 2 were elucidated as kaempferol-7-O-α-L-arabinosyl-3-O-β-D-6'-acetylglucopyranoside and kaempferol -7-O-α-L-arabinosyl-3-O-β-D-3',6'-diacetylglucopyranoside respectively.
基金This work was support by the National Natural Science Foundation of China(NSFC,No.2037402790103036).
文摘Entropic contribution to the interaction parameter (?) in the model incompressible polymer/oligomer system iscalculated by the lattice cluster theory(LCT).It is found that in the oligomer solvent,there exists a wide concentration rangethat the non-combinatorial“entropic interaction”term (?)φ_1φ_2 perceptibly counteracts the mean field combinary entropy△S_(MF).With the increase of the solvent size,both (?) and the ratio (?)φ_1φ_2/△S_(MF) first reach their maximum and finallybecome trivially to zero.It is worth noting that no any demixing was found in the current calculation.This makes thecontroversial idea“entropically driven demixing”even elusive.However,we propose that further work on compressiblepolymer solution with structured monomer will witness the demixing owning to an increased configurational correlation.
