Temperature extremes represent an important limiting factor to plant growth and productivity. Low concentration of hydrogen sulfide （H2S） has been proven to function in physiological responses to various stresses. T...Temperature extremes represent an important limiting factor to plant growth and productivity. Low concentration of hydrogen sulfide （H2S） has been proven to function in physiological responses to various stresses. The present study evaluated the effect of foliar application of wheat seedlings with a H2S donor, sodium hydrosulfide （NariS）, on the response to acute heat stress. The results showed that pretreatment with NariS could promote heat tolerance of wheat seedlings in a dose-depen- dent manner. Again, it was verified that H2S, rather than other sulfur-containing components or sodion derived from NariS solution, should contribute to the positive role in promoting wheat seedlings against heat stress. To further study antioxidant mechanisms of NariS-induced heat tolerance, superoxide dismutase （SOD, EC 1.15.1.1 ）, catalase （CAT, EC 1.11.1.6） and ascorbate peroxidase （APX, EC 1.11.1.11 ） activities, and HzS, hydrogen peroxide （H2O2）, malonaldehyde （MDA）, and soluble sugar contents in wheat seedlings were determined. The results showed that, under heat stress, the activities of SOD, CAT, and APX, H2S, H2O2, MDA, and soluble sugar contents in NaHS-pretreated seedlings and its control all increased. Meanwhile, NaHS-pretreated seedlings showed higher antioxidant enzymes activities and gene expression levels as well as the H2S and soluble sugar levels, and lower H2O2, MDA contents induced by heat stress. While little effect was detected in antioxidant enzymes activities and soluble substances contents in pretreated wheat seedlings compared with its control under normal culture conditions （data not shown）. All of our results suggested that exogenous NariS could alleviate oxidative damage and improve heat tolerance by regulating the antioxidant system in wheat seedlings under heat stress.展开更多
With the advantages of metal conductivity,large specific surface area,and rich surface functional groups,two-dimensional(2D)MXenes have shown great potential in the field of gas sensing.However,gas sensors fabricated ...With the advantages of metal conductivity,large specific surface area,and rich surface functional groups,two-dimensional(2D)MXenes have shown great potential in the field of gas sensing.However,gas sensors fabricated with pristine MXenes generally suffer from several problems such as low sensitivity,poor selectivity,significant baseresistance drift,and poor environment stability.Therefore,many efforts have been devoted to overcoming these problems.In this review,we review the progress on MXenebased gas sensors and summarize several efficient strategies(including structural design,surface modification,inorganic Schottky j unction/heterojunction sensitization,polymer addition,and metal-ion intercalation)to promote the gassensing performance.In addition,the major challenges and future development directions of MXene-based gas sensors are also outlined in the present review.展开更多
Taxonomic and phylogenetic studies on the brown-rot fungi,Fomitopsis and its related genera,are carried out.On the basis of morphological characters and phylogenetic evidence of DNA sequences of multiple loci includin...Taxonomic and phylogenetic studies on the brown-rot fungi,Fomitopsis and its related genera,are carried out.On the basis of morphological characters and phylogenetic evidence of DNA sequences of multiple loci including the internal transcribed spacer(ITS)regions,the large subunit nuclear ribosomal RNA gene(nLSU),the small subunit nuclear ribosomal RNA gene(nSSU),the small subunit mitochondrial rRNA gene sequences(mtSSU),the translation elongation factor 1-αgene(tef1)and the second subunit of RNA polymerase II(rpb2),six new genera,Fragifomes,Niveoporofomes,Piptoporellus,Rhodofomitopsis,Rubellofomes and Ungulidaedalea are established.Four new species,Buglossoporus eucalypticola,Daedalea allantoidea,Piptoporellus hainanensis and P.triqueter are descibed from China.Illustrated descriptions of the novel species are provided.Identification keys to Fomitopsis and its related genera,as well as keys to the species of each genus are provided.展开更多
Background:Acupuncture has been recommended as a nonpharmacological intervention for managing cancer-related symptoms.However,there are few bibliometric analysis-based studies concerning the overall trends and charact...Background:Acupuncture has been recommended as a nonpharmacological intervention for managing cancer-related symptoms.However,there are few bibliometric analysis-based studies concerning the overall trends and characteristics in acupuncture therapy for cancer management.This study aims to summarize the status and bibliometric characteristics of acupuncture as an intervention for cancer-related symptoms.Methods:All clinical research papers on acupuncture for the management of cancer-related symptoms published up to October 1,2020 were collected from the PubMed and Web of Science databases.Data on the included studies were extracted to reflect the following items:publication year,journal,country or region,institution,clinical indications,and acupuncture prescriptions.Characteristics were analyzed using bibliometric methods.Results:A total of 226 papers were included.The number of such publications has increased steadily since 2004.The 226 articles were published in 94 English journals,with Integrative Cancer Therapies(18 articles) and Acupuncture in Medicine(14 articles) being the most prolific.The included studies are distributed across 20 countries and regions,among which the top two are the United States of America(68 articles) and China(60 articles).The types of cancer the studies addressed include breast,gastric,head and neck,etc.Acupuncture is mainly employed in the treatment of complications and side effects,among which nausea and vomiting,pain,hot flashes,and fatigue are the most frequently treated cancer-related symptoms.Acupuncture is the most commonly used treatment therapy,and the four most frequently used acupoints used are Neiguan(内关 PC6),Sanyinjiao(三阴交 SP6),Zusanli(足三里 ST36),and Hegu(合 LI4).The specific acupuncture prescription depends on individual patients’ symptoms.Conclusion:Research on acupuncture as an adjunctive therapy for cancer-related symptoms is developing steadily,with results being reported in a growing number of mainstream medical journals.Hence,this field is expect展开更多
基金supported by the Special Fund for Agro-scientific Research in the Public Interest of China (201203029)
文摘Temperature extremes represent an important limiting factor to plant growth and productivity. Low concentration of hydrogen sulfide （H2S） has been proven to function in physiological responses to various stresses. The present study evaluated the effect of foliar application of wheat seedlings with a H2S donor, sodium hydrosulfide （NariS）, on the response to acute heat stress. The results showed that pretreatment with NariS could promote heat tolerance of wheat seedlings in a dose-depen- dent manner. Again, it was verified that H2S, rather than other sulfur-containing components or sodion derived from NariS solution, should contribute to the positive role in promoting wheat seedlings against heat stress. To further study antioxidant mechanisms of NariS-induced heat tolerance, superoxide dismutase （SOD, EC 1.15.1.1 ）, catalase （CAT, EC 1.11.1.6） and ascorbate peroxidase （APX, EC 1.11.1.11 ） activities, and HzS, hydrogen peroxide （H2O2）, malonaldehyde （MDA）, and soluble sugar contents in wheat seedlings were determined. The results showed that, under heat stress, the activities of SOD, CAT, and APX, H2S, H2O2, MDA, and soluble sugar contents in NaHS-pretreated seedlings and its control all increased. Meanwhile, NaHS-pretreated seedlings showed higher antioxidant enzymes activities and gene expression levels as well as the H2S and soluble sugar levels, and lower H2O2, MDA contents induced by heat stress. While little effect was detected in antioxidant enzymes activities and soluble substances contents in pretreated wheat seedlings compared with its control under normal culture conditions （data not shown）. All of our results suggested that exogenous NariS could alleviate oxidative damage and improve heat tolerance by regulating the antioxidant system in wheat seedlings under heat stress.
基金financially supported by the National Natural Science Foundation of China(Nos.11904209 and 61904098)the Natural Science Foundation of Shandong Province(No.ZR2019QF018)the Higher Education Research and Development Program of Shandong Province(No.J18KA242)
文摘With the advantages of metal conductivity,large specific surface area,and rich surface functional groups,two-dimensional(2D)MXenes have shown great potential in the field of gas sensing.However,gas sensors fabricated with pristine MXenes generally suffer from several problems such as low sensitivity,poor selectivity,significant baseresistance drift,and poor environment stability.Therefore,many efforts have been devoted to overcoming these problems.In this review,we review the progress on MXenebased gas sensors and summarize several efficient strategies(including structural design,surface modification,inorganic Schottky j unction/heterojunction sensitization,polymer addition,and metal-ion intercalation)to promote the gassensing performance.In addition,the major challenges and future development directions of MXene-based gas sensors are also outlined in the present review.
基金The research was financed by the National Natural Science Foundation of China(Project Nos.31170018 and 31422001)the National Science and Technology Foundation Project of China(No.2014FY210400)Beijing Higher Education Young Elite Teacher Project(YETP0774).
文摘Taxonomic and phylogenetic studies on the brown-rot fungi,Fomitopsis and its related genera,are carried out.On the basis of morphological characters and phylogenetic evidence of DNA sequences of multiple loci including the internal transcribed spacer(ITS)regions,the large subunit nuclear ribosomal RNA gene(nLSU),the small subunit nuclear ribosomal RNA gene(nSSU),the small subunit mitochondrial rRNA gene sequences(mtSSU),the translation elongation factor 1-αgene(tef1)and the second subunit of RNA polymerase II(rpb2),six new genera,Fragifomes,Niveoporofomes,Piptoporellus,Rhodofomitopsis,Rubellofomes and Ungulidaedalea are established.Four new species,Buglossoporus eucalypticola,Daedalea allantoidea,Piptoporellus hainanensis and P.triqueter are descibed from China.Illustrated descriptions of the novel species are provided.Identification keys to Fomitopsis and its related genera,as well as keys to the species of each genus are provided.
基金Supported by the National Natural Science Foundation of China:No.81774210"Sixth Major Talent Summit" of Jiangsu Province:YY-033+2 种基金"Qing Lan Project" of Jiangsu Province 2020Jiangsu Province "333 High-level Talents Cultivating Project" 2016Innovation and Entrepreneurship Training Program for College Students of Jiangsu Province 2020。
文摘Background:Acupuncture has been recommended as a nonpharmacological intervention for managing cancer-related symptoms.However,there are few bibliometric analysis-based studies concerning the overall trends and characteristics in acupuncture therapy for cancer management.This study aims to summarize the status and bibliometric characteristics of acupuncture as an intervention for cancer-related symptoms.Methods:All clinical research papers on acupuncture for the management of cancer-related symptoms published up to October 1,2020 were collected from the PubMed and Web of Science databases.Data on the included studies were extracted to reflect the following items:publication year,journal,country or region,institution,clinical indications,and acupuncture prescriptions.Characteristics were analyzed using bibliometric methods.Results:A total of 226 papers were included.The number of such publications has increased steadily since 2004.The 226 articles were published in 94 English journals,with Integrative Cancer Therapies(18 articles) and Acupuncture in Medicine(14 articles) being the most prolific.The included studies are distributed across 20 countries and regions,among which the top two are the United States of America(68 articles) and China(60 articles).The types of cancer the studies addressed include breast,gastric,head and neck,etc.Acupuncture is mainly employed in the treatment of complications and side effects,among which nausea and vomiting,pain,hot flashes,and fatigue are the most frequently treated cancer-related symptoms.Acupuncture is the most commonly used treatment therapy,and the four most frequently used acupoints used are Neiguan(内关 PC6),Sanyinjiao(三阴交 SP6),Zusanli(足三里 ST36),and Hegu(合 LI4).The specific acupuncture prescription depends on individual patients’ symptoms.Conclusion:Research on acupuncture as an adjunctive therapy for cancer-related symptoms is developing steadily,with results being reported in a growing number of mainstream medical journals.Hence,this field is expect
