Basic helix-loop-helix(bHLH)transcription factor gene family in plants controls various growth and development aspects;however,the actual roles of these genes in flowering plants are not well known.In this study,a nov...Basic helix-loop-helix(bHLH)transcription factor gene family in plants controls various growth and development aspects;however,the actual roles of these genes in flowering plants are not well known.In this study,a novel bHLH protein CmbHLH110 was found to interact with CmERF110 by in vitro and in vivo experiments,a chrysanthemum ERF110 homolog that acts as a positive flowering regulator.In addition,CmbHLH110 was also found to regulate the flowering of chrysanthemums,overexpression of CmbHLH110 causes chrysanthemums to flower earlier,and suppressed CmbHLH110 leads to delayed flowering.Furthermore,the loss-of-function Arabidopsis mutant of its homologue PERICYCLE FACTOR TYPE-A 5(PFA5)had a noticeable late flowering phenotype,and CmbHLH110 completely complemented the late flowering phenotype of the pfa5 mutant,whereas heterologous overexpression of CmbHLH110 in Arabidopsis Col-0 caused early flowering.Transcriptome sequencing revealed significant differential expression of flowering-related and circadian clock-related genes in transgenic chrysanthemum.Therefore,we concluded that CmbHLH110,as a novel flowering regulator,could interact with CmERF110 to regulate flowering in chrysanthemum.展开更多
AIM:To investigate systemic immune-inflammation index(SII),neutrophil-to-lymphocyte ratio(NLR),and plateletto-lymphocyte ratio(PLR)levels in patients with type 2 diabetes at different stages of diabetic retinopathy(DR...AIM:To investigate systemic immune-inflammation index(SII),neutrophil-to-lymphocyte ratio(NLR),and plateletto-lymphocyte ratio(PLR)levels in patients with type 2 diabetes at different stages of diabetic retinopathy(DR).METHODS:This retrospective study included 141 patients with type 2 diabetes mellitus(DM):45 without diabetic retinopathy(NDR),47 with non-proliferative diabetic retinopathy(NPDR),and 49 with proliferative diabetic retinopathy(PDR).Complete blood counts were obtained,and NLR,PLR,and SII were calculated.The study analysed the ability of inflammatory markers to predict DR using receiver operating characteristic(ROC)curves.The relationships between DR stages and SII,PLR,and NLP were assessed using multivariate logistic regression.RESULTS:The average NLR,PLR,and SII were higher in the PDR group than in the NPDR group(P=0.011,0.043,0.009,respectively);higher in the NPDR group than in the NDR group(P<0.001 for all);and higher in the PDR group than in the NDR group(P<0.001 for all).In the ROC curve analysis,the NLR,PLR,and SII were significant predictors of DR(P<0.001 for all).The highest area under the curve(AUC)was for the PLR(0.929 for PLR,0.925 for SII,and 0.821 for NLR).Multivariate regression analysis indicated that NLR,PLR,and SII were statistically significantly positive and independent predictors for the DR stages in patients with DM[odds ratio(OR)=1.122,95%confidence interval(CI):0.200–2.043,P<0.05;OR=0.038,95%CI:0.018–0.058,P<0.05;OR=0.007,95%CI:0.001–0.01,P<0.05,respectively).CONCLUSION:The NLR,PLR,and SII may be used as predictors of DR.展开更多
DEAR EDITOR,Individual dispersal trends, unquestionably important for species ecology and evolution, are affected by multiple factors. Understanding the factors that influence female dispersal strategies offers import...DEAR EDITOR,Individual dispersal trends, unquestionably important for species ecology and evolution, are affected by multiple factors. Understanding the factors that influence female dispersal strategies offers important insight into primate dispersal mechanisms and female choice. To investigate the proximate causes of dispersal in female Yunnan snub-nosed monkeys (Rhinopithecus bieti), we observed and analyzed nine years of detailed dispersal and demographic data from a population of R. bieti in Xiangguqing, Baimaxueshan Nature Reserve, Yunnan Province, China. Results showed that females who lived long-term in a one-male unit (OMU), without giving birth and with few or no relatives, were more likely to leave that OMU. In addition, an OMU led by an outgroup male and containing more female relatives was significantly more likely to be chosen for immigration. Conversely, greater male age, longer male tenure, and more potentially fertile females discouraged immigration into an OMU. These results suggest that reproduction, male quality, and kin cooperation play the largest roles in female Yunnan snub-nosed monkey dispersal.展开更多
The detection of manganese(Mn)in steel by laser-induced breakdown spectroscopy(LIBS)provides essential information for steelmaking.However,self-absorption greatly disrupts the LIBS spectral lines of Mn with high conte...The detection of manganese(Mn)in steel by laser-induced breakdown spectroscopy(LIBS)provides essential information for steelmaking.However,self-absorption greatly disrupts the LIBS spectral lines of Mn with high content.In this study,to minimize self-absorption for Mn spectral lines in LIBS,laser-induced fluorescence(LIF)was applied.Compared with conventional LIBS,the self-absorption factors(α)of Mn I 403.08,403.31,and 403.45 nm lines were reduced by 90%,88%,and 88%,respectively;the root mean square errors of crossvalidation were decreased by 88%,85%,and 87%,respectively;the average relative errors were reduced by 93%,90%,and 91%,respectively;and average relative standard deviations were decreased by 29%,32%,and 33%,respectively.The LIBS-LIF was shown to successfully minimize the self-absorption effect and spectral intensity fluctuation and improve detection accuracy.展开更多
The effects of ionizing and displacement irradiation of high-energy x-ray and 2-MeV proton on GaN thin films were investigated and compared in this study.The electrical properties of both P-GaN and N-GaN,separated fro...The effects of ionizing and displacement irradiation of high-energy x-ray and 2-MeV proton on GaN thin films were investigated and compared in this study.The electrical properties of both P-GaN and N-GaN,separated from power devices,were gauged for fundamental analysis.It was found that the electrical properties of P-GaN were improved as a consequence of the disruption of the Mg-H bond induced by high-dose x-ray irradiation,as indicated by the Hall and circular transmission line model.Specifically,under a 100-Mrad(Si)x-ray dose,the specific contact resistance pc of P-GaN decreased by 30%,and the hole carrier concentration increased significantly.Additionally,the atom displacement damage effect of a 2-MeV proton of 1×10^(13)p/cm^(2)led to a significant degradation of the electrical properties of P-GaN,while those of N-GaN remained unchanged.P-GaN was found to be more sensitive to irradiation than N-GaN thin film.The effectiveness of x-ray irradiation in enhancing the electrical properties of P-GaN thin films was demonstrated in this study.展开更多
Objective:To avoid perioperative complications caused malnutrition,nutrition therapy is necessary in gastric outlet obstruction(GOO)patients.Compared to parenteral nutrition(PN),enteral nutrition(EN)is associated with...Objective:To avoid perioperative complications caused malnutrition,nutrition therapy is necessary in gastric outlet obstruction(GOO)patients.Compared to parenteral nutrition(PN),enteral nutrition(EN)is associated with many advantages.This study aimed to investigate whether preoperative EN has beneficial clinical effects compared to preoperative PN in gastric cancer patients with GOO undergoing surgery.Methods:According to the methods of preoperative nutrition therapy,143 patients were divided into EN group(n=42)and PN group(n=101)between January 2013 and December 2017 at the Chinese People’s Liberation Army General Hospital.Multiple logistic regression models were used to assess the association between the methods of preoperative nutrition therapy and postoperative day of flatus passage.The generalized additive model and twopiecewise linear regression model were used to calculate the inflection point of the preoperative nutritional therapy time on the postoperative day of flatus passage in the PN group.Results:EN shortened the postoperative day of flatus passage in gastric cancer patients with GOO,which is a protective factor,especially in patients who underwent non-radical operations and the postoperative day of flatus passage reduced when the preoperative PN therapy was up to 3 d and a longer PN therapy(>3 d)did not accelerate the postoperative recovery of gastrointestinal functions.Conclusions:Preoperative EN therapy would benefit gastric cancer patients with GOO by accelerating postoperative recovery.For patients with absolute obstruction,no more than 3-day PN therapy is recommended if patients can tolerate general anesthesia and surgery.展开更多
Objective:This multi-center,open-label,randomized,parallel-controlled phaseⅡstudy aimed to compare the pharmacokinetics(PK),pharmacodynamics(PD)and safety profile of ripertamab(SCT400),a recombinant antiCD20 monoclon...Objective:This multi-center,open-label,randomized,parallel-controlled phaseⅡstudy aimed to compare the pharmacokinetics(PK),pharmacodynamics(PD)and safety profile of ripertamab(SCT400),a recombinant antiCD20 monoclonal antibody,to rituximab(MabThera^(■))in patients with CD20-positive B-cell non-Hodgkin lymphoma(NHL).Methods:Patients with CD20-positive B-cell NHL who achieved complete remission or unconfirmed complete remission after standard treatment were randomly assigned at a 1:1 ratio to receive a single dose of ripertamab(375mg/m^(2))or rituximab(MabThera^(■),375 mg/m^(2)).PK was evaluated using area under the concentration-time curve(AUC)from time 0 to d 85(AUC_(0-85d)),AUC from time 0 to week 1(AUC0-1 w),AUC from time 0 to week 2(AUC_(0-2 w)),AUC from time 0 to week 3(AUC_(0-3 w)),AUC from time 0 to week 8(AUC_(0-8 w)),maximum serum concentration(C_(max)),terminal half-life(T_(1/2)),time to maximum serum concentration(T_(max))and clearance(CL).Bioequivalence was confirmed if the 90%confidence interval(90%CI)of the geometric mean ratio of ripertamab/rituximab was within the pre-defined bioequivalence range of 80.0%-125.0%.PD,immunogenicity,and safety were also evaluated.Results:From December 30,2014 to November 24,2015,a total of 84 patients were randomized(ripertamab,n=42;rituximab,n=42)and the PK analysis was performed on 76 patients(ripertamab,n=38;rituximab,n=38).The geometric mean ratios of ripertamab/rituximab for AUC_(0-85d),ATC_(0-inf),and Cmaxwere 96.1%(90%CI:87.6%-105.5%),95.9%(90%CI:86.5%-106.4%)and 97.4%(90%CI:91.6%-103.6%),respectively.All PK parameters met the pre-defined bioequivalence range of 80.0%-125.0%.For PD and safety evaluation,there was no statistical difference in peripheral CD 19-positive B-cell counts and CD20-positive B-cell counts at each visit,and no difference in the incidence of anti-drug antibodies was observed between the two groups.The incidences of treatment-emergent adverse events and treatment-related adverse events were also comparable between the two groups.Conclusions:In this study,the PK,PD,immunogenicity,and safety profile of ripertamab(SCT400)were similar to rituximab(MabThera^(■))in Chinese patients with CD20-positive B-cell NHL.展开更多
The species diversity and altitudinal distribution of amphibians along an eleva tional gradient of 200-1600 m in the Xianxialing and Wuyishan Mountain Ranges in Southeastern China were investiga ted through time-const...The species diversity and altitudinal distribution of amphibians along an eleva tional gradient of 200-1600 m in the Xianxialing and Wuyishan Mountain Ranges in Southeastern China were investiga ted through time-constra ined visual surveys along 32 transect lines in 9 survey areas,in which the ha bitat types were also recorded.A total of 27 amphibian species belonging to 19 genera,7 families,and 2 orders were found.The species diversity of the amphibians plateaued at low elevation,and the altitudinal boundary of their distribution was at 800 m.Their species compositions were dissimilar in the two mountain ranges probably beca use the annual average temperature and annual rainfall were different in both areas.The eleva tional Rapoport's rule demonstrated that the species range size of the amphibians expanded as the elevation increased in both mountain ranges.The results of the cross species method supported the rule only when the influence of the low-frequency occurrence proba bility of an investigated species was excluded,whereas those of the Steven's method strongly corroborated the rule rega rdless of the incidental occurrence or absence of the species.展开更多
Laser-induced breakdown spectroscopy（LIBS） combined with K-means algorithm was employed to automatically differentiate industrial polymers under atmospheric conditions.The unsupervised learning algorithm K-means wer...Laser-induced breakdown spectroscopy（LIBS） combined with K-means algorithm was employed to automatically differentiate industrial polymers under atmospheric conditions.The unsupervised learning algorithm K-means were utilized for the clustering of LIBS dataset measured from twenty kinds of industrial polymers.To prevent the interference from metallic elements,three atomic emission lines（C I 247.86 nm,H I 656.3 nm,and O I 777.3 nm） and one molecular line C–N（0,0） 388.3 nm were used.The cluster analysis results were obtained through an iterative process.The Davies–Bouldin index was employed to determine the initial number of clusters.The average relative standard deviation values of characteristic spectral lines were used as the iterative criterion.With the proposed approach,the classification accuracy for twenty kinds of industrial polymers achieved 99.6%.The results demonstrated that this approach has great potential for industrial polymers recycling by LIBS.展开更多
Lysine succinylation is a novel,naturally occurring posttranslational modification(PTM)in living organisms.Global lysine succinylation identification has been performed at the proteomic level in various species;howeve...Lysine succinylation is a novel,naturally occurring posttranslational modification(PTM)in living organisms.Global lysine succinylation identification has been performed at the proteomic level in various species;however,the study of lysine succinylation in plant species is relatively limited.Patchouli plant(P.cablin(Blanco)Benth.,Lamiaceae)is a globally important industrial plant and medicinal herb.In the present study,lysine succinylome analysis was carried out in patchouli plants to determine the potential regulatory role of lysine succinylation in patchouli growth,development,and physiology.The global succinylation sites and proteins in patchouli plants were screened with an immunoprecipitation affinity enrichment technique and advanced mass spectrometry-based proteomics.Several bioinformatic analyses,such as function classification and enrichment,subcellular location predication,metabolic pathway enrichment and protein−protein interaction networking,were conducted to characterize the functions of the identified sites and proteins.In total,1097 succinylation sites in 493 proteins were detected in patchouli plants,among which 466 succinylation sites in 241 proteins were repeatedly identified within three independent experiments.The functional characterization of these proteins indicated that the tricarboxylic acid(TCA)cycle,oxidative phosphorylation,photosynthesis processes,and amino acid biosynthesis may be regulated by lysine succinylation.In addition,these succinylated proteins showed a wide subcellular location distribution,although the chloroplast and cytoplasm were the top two preferred cellular components.Our study suggested the important role of lysine succinylation in patchouli plant physiology and biology and could serve as a useful reference for succinylation studies in other medicinal plants.展开更多
The breeding activities aimed to create a natural green cocoon variety for spring rearing with the characteristics of stable natural cocoon color,easy rearing and good silk quality.Four different lines from the excell...The breeding activities aimed to create a natural green cocoon variety for spring rearing with the characteristics of stable natural cocoon color,easy rearing and good silk quality.Four different lines from the excellent silkworm variety Jingsong×Haoyue were taken as recurrent parents,using the natural green cocoon variety G 9202 as donor parent.After other excellent parents were introduced to cross with these different lines,four new breeding materials were selected by recurrent backcross breeding.The characters of these breeding materials showed not only natural green cocoon but also excellent comprehensive traits.A naturally colored cocoon quaternary hybrid with excellent practical characters was selected based on multiple hybrids.It is suitable for spring rearing in Yangtze valley which includes Hunan Province.It was approved by Hunan Provincial Crop Variety Approval Committee and designated Xiangcailu No.1 in 2016.展开更多
In this paper, we developed a portable laser-induced breakdown spectroscopy(LIBS) using an optical fiber to deliver laser energy and used it to quantitatively analyze minor elements in steel.The R^2 factors of calibra...In this paper, we developed a portable laser-induced breakdown spectroscopy(LIBS) using an optical fiber to deliver laser energy and used it to quantitatively analyze minor elements in steel.The R^2 factors of calibration curves of elements Mn, Ti, V, and Cr in pig iron were 0.9965,0.9983, 0.9963, and 0.991, respectively, and their root mean square errors of cross-validation were 0.0501, 0.0054, 0.0205, and 0.0245 wt%, respectively. Six test samples were used for the validation of the performance of the calibration curves established by the portable LIBS. The average relative errors of elements Mn, Ti, V, and Cr were 2.5%, 11.7%, 13.0%, and 5.6%,respectively. These results were comparable with most results reported in traditional LIBS in steel or other matrices. However, the portable LIBS is flexible, compact, and robust, providing a promising prospect in industrial application.展开更多
Using comparative molecular field analysis approach, the interaction of 17 tetrahydroprotdederines to D1 reccptor and15 ones to D2 reccptor have ben studied by 3D-QsAR. respectively. The results indicated that the int...Using comparative molecular field analysis approach, the interaction of 17 tetrahydroprotdederines to D1 reccptor and15 ones to D2 reccptor have ben studied by 3D-QsAR. respectively. The results indicated that the interactions of THPBs withdopamine receplors were primarily clectrostatic interactions. with more positive charge in lignnd and more negative in receptor.展开更多
BACKGROUND Acute coronary syndrome(ACS)encompasses a spectrum of cardiovascular emergencies arising from the obstruction of coronary artery blood flow and acute myocardial ischemia.Recent studies have revealed that th...BACKGROUND Acute coronary syndrome(ACS)encompasses a spectrum of cardiovascular emergencies arising from the obstruction of coronary artery blood flow and acute myocardial ischemia.Recent studies have revealed that thyroid function is closely related to ACS.However,only a few reports of thyrotoxicosis-induced ACS with severe atherosclerosis have been reported.CASE SUMMARY A 33-year-old man,who had a history of hyperthyroidism without taking any antithyroid drugs and no history of coronary heart disease,experienced neck pain with occasional heart palpitations starting 3 mo prior that were aggravated after an activity.As the symptoms worsened at 21 d prior,he went to a hospital for treatment.The electrocardiogram examination showed a multilead ST segment elevation and pathological Q waves.Based on these findings and his symptoms,the patient was diagnosed with a suspected myocardial infarction and transferred to our hospital on July 2,2020.He was diagnosed with a rare case of ACS due to coronary artery atherosclerosis in the anterior descending artery complicated by hyperthyroidism.A paclitaxel-coated drug balloon was used for treatment to avoid the use of metal stents,thus reducing the time of antiplatelet therapy and facilitating the continued treatment of hyperthyroidism.The 9-mo follow-up showed favorable results.CONCLUSION This case highlights that atherosclerosis is a cause of ACS that cannot be ignored even in a patient with hyperthyroidism.展开更多
Chinese martial arts have a long history, profound, which is an integral part of Chinese traditional culture of grandeur. China joined the WTO and the Beijing Olympic Games ＂has a rich cultural heritage of thousands ...Chinese martial arts have a long history, profound, which is an integral part of Chinese traditional culture of grandeur. China joined the WTO and the Beijing Olympic Games ＂has a rich cultural heritage of thousands of years of Chinese martial arts with its unique charm and much of the world＇ s attention.＂ In the face of opportunities and challenges, the international spread of martial arts has become an irresistible trend. ＂First of propagation, the spread of the concept of martial arts and martial arts were defined international spread, and it were explains martial international spread of cultural level societal level and significance of the economic level, dialectical judge the outcome of the international transmission acquired with the problems.＂ Secondly, the traditional martial arts culture for martial international dissemination presented aphasia phenomenon, by means of the analysis of the advanced nature of martial arts culture, the martial arts and cultural heritage considered as the center of gravity advantages, not only to absorb the multicultural essence of martial arts culture useful, but also highlight the ethnic characteristics of martial arts culture, martial arts culture to enhance capacity external radiation, the Chinese martial arts as a complete all- round cultural forms, multi-level, multi-an^le display, promote the Chinese martial arts to the world in a more in-depth. ＂展开更多
Based oil the models of dopanmine reccptors and tetrahydroprolobotherine complexes.we carried cul semiempiricalquantum of cmical calculations on the active sites of rcceptors and ligands. The results showed that foe f...Based oil the models of dopanmine reccptors and tetrahydroprolobotherine complexes.we carried cul semiempiricalquantum of cmical calculations on the active sites of rcceptors and ligands. The results showed that foe frontier melccular orbitals oflignod and receplor just matched cach other.which suggerted that ligand and receptor might form charge-transfer interaction.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.32072609)National Key Research and Development Program of China(Grant No.2018YFD1000400)+3 种基金National Natural Science Foundation of China(Grant No.32002075)the China Postdoctoral Science Foundation(Grant No.2019M661871)the Fundamental Research Funds for the Central Universities(Grant No.KJQN202126)a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions。
文摘Basic helix-loop-helix(bHLH)transcription factor gene family in plants controls various growth and development aspects;however,the actual roles of these genes in flowering plants are not well known.In this study,a novel bHLH protein CmbHLH110 was found to interact with CmERF110 by in vitro and in vivo experiments,a chrysanthemum ERF110 homolog that acts as a positive flowering regulator.In addition,CmbHLH110 was also found to regulate the flowering of chrysanthemums,overexpression of CmbHLH110 causes chrysanthemums to flower earlier,and suppressed CmbHLH110 leads to delayed flowering.Furthermore,the loss-of-function Arabidopsis mutant of its homologue PERICYCLE FACTOR TYPE-A 5(PFA5)had a noticeable late flowering phenotype,and CmbHLH110 completely complemented the late flowering phenotype of the pfa5 mutant,whereas heterologous overexpression of CmbHLH110 in Arabidopsis Col-0 caused early flowering.Transcriptome sequencing revealed significant differential expression of flowering-related and circadian clock-related genes in transgenic chrysanthemum.Therefore,we concluded that CmbHLH110,as a novel flowering regulator,could interact with CmERF110 to regulate flowering in chrysanthemum.
基金Affiliated Jinling Hospital,Medical School of Nanjing University(No.22JCYYYB29).
文摘AIM:To investigate systemic immune-inflammation index(SII),neutrophil-to-lymphocyte ratio(NLR),and plateletto-lymphocyte ratio(PLR)levels in patients with type 2 diabetes at different stages of diabetic retinopathy(DR).METHODS:This retrospective study included 141 patients with type 2 diabetes mellitus(DM):45 without diabetic retinopathy(NDR),47 with non-proliferative diabetic retinopathy(NPDR),and 49 with proliferative diabetic retinopathy(PDR).Complete blood counts were obtained,and NLR,PLR,and SII were calculated.The study analysed the ability of inflammatory markers to predict DR using receiver operating characteristic(ROC)curves.The relationships between DR stages and SII,PLR,and NLP were assessed using multivariate logistic regression.RESULTS:The average NLR,PLR,and SII were higher in the PDR group than in the NPDR group(P=0.011,0.043,0.009,respectively);higher in the NPDR group than in the NDR group(P<0.001 for all);and higher in the PDR group than in the NDR group(P<0.001 for all).In the ROC curve analysis,the NLR,PLR,and SII were significant predictors of DR(P<0.001 for all).The highest area under the curve(AUC)was for the PLR(0.929 for PLR,0.925 for SII,and 0.821 for NLR).Multivariate regression analysis indicated that NLR,PLR,and SII were statistically significantly positive and independent predictors for the DR stages in patients with DM[odds ratio(OR)=1.122,95%confidence interval(CI):0.200–2.043,P<0.05;OR=0.038,95%CI:0.018–0.058,P<0.05;OR=0.007,95%CI:0.001–0.01,P<0.05,respectively).CONCLUSION:The NLR,PLR,and SII may be used as predictors of DR.
基金supported by the National Key Program of Research and Development,Ministry of Science and Technology(2016YFC0503200)National Natural Science Foundation of China(31470461+2 种基金 31700408)Sichuan Youth Science&Technology Foundation(2015JQ0024)Applied Basic Research Program of Sichuan Province(2017JY0325)
文摘DEAR EDITOR,Individual dispersal trends, unquestionably important for species ecology and evolution, are affected by multiple factors. Understanding the factors that influence female dispersal strategies offers important insight into primate dispersal mechanisms and female choice. To investigate the proximate causes of dispersal in female Yunnan snub-nosed monkeys (Rhinopithecus bieti), we observed and analyzed nine years of detailed dispersal and demographic data from a population of R. bieti in Xiangguqing, Baimaxueshan Nature Reserve, Yunnan Province, China. Results showed that females who lived long-term in a one-male unit (OMU), without giving birth and with few or no relatives, were more likely to leave that OMU. In addition, an OMU led by an outgroup male and containing more female relatives was significantly more likely to be chosen for immigration. Conversely, greater male age, longer male tenure, and more potentially fertile females discouraged immigration into an OMU. These results suggest that reproduction, male quality, and kin cooperation play the largest roles in female Yunnan snub-nosed monkey dispersal.
基金financially supported by National Natural Science Foundation of China(No.62005078)the Scientific Research Foundation of Hunan Provincial Education Department(No.21B0477)the Natural Science Foundation of Hunan Province(No.2020JJ5206)。
文摘The detection of manganese(Mn)in steel by laser-induced breakdown spectroscopy(LIBS)provides essential information for steelmaking.However,self-absorption greatly disrupts the LIBS spectral lines of Mn with high content.In this study,to minimize self-absorption for Mn spectral lines in LIBS,laser-induced fluorescence(LIF)was applied.Compared with conventional LIBS,the self-absorption factors(α)of Mn I 403.08,403.31,and 403.45 nm lines were reduced by 90%,88%,and 88%,respectively;the root mean square errors of crossvalidation were decreased by 88%,85%,and 87%,respectively;the average relative errors were reduced by 93%,90%,and 91%,respectively;and average relative standard deviations were decreased by 29%,32%,and 33%,respectively.The LIBS-LIF was shown to successfully minimize the self-absorption effect and spectral intensity fluctuation and improve detection accuracy.
文摘The effects of ionizing and displacement irradiation of high-energy x-ray and 2-MeV proton on GaN thin films were investigated and compared in this study.The electrical properties of both P-GaN and N-GaN,separated from power devices,were gauged for fundamental analysis.It was found that the electrical properties of P-GaN were improved as a consequence of the disruption of the Mg-H bond induced by high-dose x-ray irradiation,as indicated by the Hall and circular transmission line model.Specifically,under a 100-Mrad(Si)x-ray dose,the specific contact resistance pc of P-GaN decreased by 30%,and the hole carrier concentration increased significantly.Additionally,the atom displacement damage effect of a 2-MeV proton of 1×10^(13)p/cm^(2)led to a significant degradation of the electrical properties of P-GaN,while those of N-GaN remained unchanged.P-GaN was found to be more sensitive to irradiation than N-GaN thin film.The effectiveness of x-ray irradiation in enhancing the electrical properties of P-GaN thin films was demonstrated in this study.
基金funded by the Special Funding for Clinical Research of Wu Jieping Medical Foundation(No.320.2710.1848)the Clinical Research Supporting Project of PLA Genenral Hospital(No.109310)the Beijing Municipal Science and Technology Project(No.D171100006517002 and No.D171100006517004)。
文摘Objective:To avoid perioperative complications caused malnutrition,nutrition therapy is necessary in gastric outlet obstruction(GOO)patients.Compared to parenteral nutrition(PN),enteral nutrition(EN)is associated with many advantages.This study aimed to investigate whether preoperative EN has beneficial clinical effects compared to preoperative PN in gastric cancer patients with GOO undergoing surgery.Methods:According to the methods of preoperative nutrition therapy,143 patients were divided into EN group(n=42)and PN group(n=101)between January 2013 and December 2017 at the Chinese People’s Liberation Army General Hospital.Multiple logistic regression models were used to assess the association between the methods of preoperative nutrition therapy and postoperative day of flatus passage.The generalized additive model and twopiecewise linear regression model were used to calculate the inflection point of the preoperative nutritional therapy time on the postoperative day of flatus passage in the PN group.Results:EN shortened the postoperative day of flatus passage in gastric cancer patients with GOO,which is a protective factor,especially in patients who underwent non-radical operations and the postoperative day of flatus passage reduced when the preoperative PN therapy was up to 3 d and a longer PN therapy(>3 d)did not accelerate the postoperative recovery of gastrointestinal functions.Conclusions:Preoperative EN therapy would benefit gastric cancer patients with GOO by accelerating postoperative recovery.For patients with absolute obstruction,no more than 3-day PN therapy is recommended if patients can tolerate general anesthesia and surgery.
基金funded by Sinocelltech Ltd, Beijing Chinapartly supported by China National Major Project for New Drug Innovation (No. 2012ZX09303012 and No. 2017ZX09304015)
文摘Objective:This multi-center,open-label,randomized,parallel-controlled phaseⅡstudy aimed to compare the pharmacokinetics(PK),pharmacodynamics(PD)and safety profile of ripertamab(SCT400),a recombinant antiCD20 monoclonal antibody,to rituximab(MabThera^(■))in patients with CD20-positive B-cell non-Hodgkin lymphoma(NHL).Methods:Patients with CD20-positive B-cell NHL who achieved complete remission or unconfirmed complete remission after standard treatment were randomly assigned at a 1:1 ratio to receive a single dose of ripertamab(375mg/m^(2))or rituximab(MabThera^(■),375 mg/m^(2)).PK was evaluated using area under the concentration-time curve(AUC)from time 0 to d 85(AUC_(0-85d)),AUC from time 0 to week 1(AUC0-1 w),AUC from time 0 to week 2(AUC_(0-2 w)),AUC from time 0 to week 3(AUC_(0-3 w)),AUC from time 0 to week 8(AUC_(0-8 w)),maximum serum concentration(C_(max)),terminal half-life(T_(1/2)),time to maximum serum concentration(T_(max))and clearance(CL).Bioequivalence was confirmed if the 90%confidence interval(90%CI)of the geometric mean ratio of ripertamab/rituximab was within the pre-defined bioequivalence range of 80.0%-125.0%.PD,immunogenicity,and safety were also evaluated.Results:From December 30,2014 to November 24,2015,a total of 84 patients were randomized(ripertamab,n=42;rituximab,n=42)and the PK analysis was performed on 76 patients(ripertamab,n=38;rituximab,n=38).The geometric mean ratios of ripertamab/rituximab for AUC_(0-85d),ATC_(0-inf),and Cmaxwere 96.1%(90%CI:87.6%-105.5%),95.9%(90%CI:86.5%-106.4%)and 97.4%(90%CI:91.6%-103.6%),respectively.All PK parameters met the pre-defined bioequivalence range of 80.0%-125.0%.For PD and safety evaluation,there was no statistical difference in peripheral CD 19-positive B-cell counts and CD20-positive B-cell counts at each visit,and no difference in the incidence of anti-drug antibodies was observed between the two groups.The incidences of treatment-emergent adverse events and treatment-related adverse events were also comparable between the two groups.Conclusions:In this study,the PK,PD,immunogenicity,and safety profile of ripertamab(SCT400)were similar to rituximab(MabThera^(■))in Chinese patients with CD20-positive B-cell NHL.
基金The work was carried out in compliance with the current laws on animal welfare and research in China,and was supported by grants from the Zhejiang Provincial Natural Science Foundation of China(LQ16C040001,LY17C030003)National Natural Science Foundation of China(31500308,31971414)+1 种基金Special Founda tion fur Basic Work of the Science and technology Ministry of China(2015FY110200)Zhejiang Science and Technology Innovation Program for College Students(2019R434006).We thank Hongxing GUO,Yingchao HU,Youfu LIN,Hongze QI,Zeshuang WANG,Haohua WEI,Yankun WU and Yaofei YU for assistance during the research.
文摘The species diversity and altitudinal distribution of amphibians along an eleva tional gradient of 200-1600 m in the Xianxialing and Wuyishan Mountain Ranges in Southeastern China were investiga ted through time-constra ined visual surveys along 32 transect lines in 9 survey areas,in which the ha bitat types were also recorded.A total of 27 amphibian species belonging to 19 genera,7 families,and 2 orders were found.The species diversity of the amphibians plateaued at low elevation,and the altitudinal boundary of their distribution was at 800 m.Their species compositions were dissimilar in the two mountain ranges probably beca use the annual average temperature and annual rainfall were different in both areas.The eleva tional Rapoport's rule demonstrated that the species range size of the amphibians expanded as the elevation increased in both mountain ranges.The results of the cross species method supported the rule only when the influence of the low-frequency occurrence proba bility of an investigated species was excluded,whereas those of the Steven's method strongly corroborated the rule rega rdless of the incidental occurrence or absence of the species.
基金supported by National Natural Science Foundation of China (Nos.61575073 and 51429501)
文摘Laser-induced breakdown spectroscopy（LIBS） combined with K-means algorithm was employed to automatically differentiate industrial polymers under atmospheric conditions.The unsupervised learning algorithm K-means were utilized for the clustering of LIBS dataset measured from twenty kinds of industrial polymers.To prevent the interference from metallic elements,three atomic emission lines（C I 247.86 nm,H I 656.3 nm,and O I 777.3 nm） and one molecular line C–N（0,0） 388.3 nm were used.The cluster analysis results were obtained through an iterative process.The Davies–Bouldin index was employed to determine the initial number of clusters.The average relative standard deviation values of characteristic spectral lines were used as the iterative criterion.With the proposed approach,the classification accuracy for twenty kinds of industrial polymers achieved 99.6%.The results demonstrated that this approach has great potential for industrial polymers recycling by LIBS.
基金support for this research was provided in part by a grant from Project 81803657 supported by the National Natural Science Foundation of Chinathe Guangdong Education department Key Promotion Platform Construction Project,Lingnan Key Laboratory of Chinese Medicine Resources Ministry of Education(2014KTSPT016)+1 种基金special funds for the Construction of Traditional Chinese Medicine in Guangdong Province(No.20181075)the earmarked fund for Guangdong Education Department Innovation Strong School Project(No.E1-KFD015181K28/2017KQNCX039).
文摘Lysine succinylation is a novel,naturally occurring posttranslational modification(PTM)in living organisms.Global lysine succinylation identification has been performed at the proteomic level in various species;however,the study of lysine succinylation in plant species is relatively limited.Patchouli plant(P.cablin(Blanco)Benth.,Lamiaceae)is a globally important industrial plant and medicinal herb.In the present study,lysine succinylome analysis was carried out in patchouli plants to determine the potential regulatory role of lysine succinylation in patchouli growth,development,and physiology.The global succinylation sites and proteins in patchouli plants were screened with an immunoprecipitation affinity enrichment technique and advanced mass spectrometry-based proteomics.Several bioinformatic analyses,such as function classification and enrichment,subcellular location predication,metabolic pathway enrichment and protein−protein interaction networking,were conducted to characterize the functions of the identified sites and proteins.In total,1097 succinylation sites in 493 proteins were detected in patchouli plants,among which 466 succinylation sites in 241 proteins were repeatedly identified within three independent experiments.The functional characterization of these proteins indicated that the tricarboxylic acid(TCA)cycle,oxidative phosphorylation,photosynthesis processes,and amino acid biosynthesis may be regulated by lysine succinylation.In addition,these succinylated proteins showed a wide subcellular location distribution,although the chloroplast and cytoplasm were the top two preferred cellular components.Our study suggested the important role of lysine succinylation in patchouli plant physiology and biology and could serve as a useful reference for succinylation studies in other medicinal plants.
基金Supported by Earmarked Fund for China Agriculture Research System(CARS-18)Hunan Provincial Science and Technology Support Program(2013NK3071)+1 种基金Natural Science Foundation of Hunan Province(2017JJ2137)Silkworm Germplasm Resources Multi-element Application Research and Development Innovation Team(2017XC01)
文摘The breeding activities aimed to create a natural green cocoon variety for spring rearing with the characteristics of stable natural cocoon color,easy rearing and good silk quality.Four different lines from the excellent silkworm variety Jingsong×Haoyue were taken as recurrent parents,using the natural green cocoon variety G 9202 as donor parent.After other excellent parents were introduced to cross with these different lines,four new breeding materials were selected by recurrent backcross breeding.The characters of these breeding materials showed not only natural green cocoon but also excellent comprehensive traits.A naturally colored cocoon quaternary hybrid with excellent practical characters was selected based on multiple hybrids.It is suitable for spring rearing in Yangtze valley which includes Hunan Province.It was approved by Hunan Provincial Crop Variety Approval Committee and designated Xiangcailu No.1 in 2016.
基金supported by National Natural Science Foundation of China (Grant Nos. 61705064 & 11647122)the Natural Science Foundation of Hubei Province (Grant Nos. 2018CFB773 & 2018CFB672)the Project of the Hubei Provincial Department of Education (Grant No. T201617)
文摘In this paper, we developed a portable laser-induced breakdown spectroscopy(LIBS) using an optical fiber to deliver laser energy and used it to quantitatively analyze minor elements in steel.The R^2 factors of calibration curves of elements Mn, Ti, V, and Cr in pig iron were 0.9965,0.9983, 0.9963, and 0.991, respectively, and their root mean square errors of cross-validation were 0.0501, 0.0054, 0.0205, and 0.0245 wt%, respectively. Six test samples were used for the validation of the performance of the calibration curves established by the portable LIBS. The average relative errors of elements Mn, Ti, V, and Cr were 2.5%, 11.7%, 13.0%, and 5.6%,respectively. These results were comparable with most results reported in traditional LIBS in steel or other matrices. However, the portable LIBS is flexible, compact, and robust, providing a promising prospect in industrial application.
文摘Using comparative molecular field analysis approach, the interaction of 17 tetrahydroprotdederines to D1 reccptor and15 ones to D2 reccptor have ben studied by 3D-QsAR. respectively. The results indicated that the interactions of THPBs withdopamine receplors were primarily clectrostatic interactions. with more positive charge in lignnd and more negative in receptor.
基金Supported by Science and Technology Planning Project of Hunan Province,No.2018JJ2304the Research Foundation of Hunan University of Chinese Medicine,No.2019XJJJ042.
文摘BACKGROUND Acute coronary syndrome(ACS)encompasses a spectrum of cardiovascular emergencies arising from the obstruction of coronary artery blood flow and acute myocardial ischemia.Recent studies have revealed that thyroid function is closely related to ACS.However,only a few reports of thyrotoxicosis-induced ACS with severe atherosclerosis have been reported.CASE SUMMARY A 33-year-old man,who had a history of hyperthyroidism without taking any antithyroid drugs and no history of coronary heart disease,experienced neck pain with occasional heart palpitations starting 3 mo prior that were aggravated after an activity.As the symptoms worsened at 21 d prior,he went to a hospital for treatment.The electrocardiogram examination showed a multilead ST segment elevation and pathological Q waves.Based on these findings and his symptoms,the patient was diagnosed with a suspected myocardial infarction and transferred to our hospital on July 2,2020.He was diagnosed with a rare case of ACS due to coronary artery atherosclerosis in the anterior descending artery complicated by hyperthyroidism.A paclitaxel-coated drug balloon was used for treatment to avoid the use of metal stents,thus reducing the time of antiplatelet therapy and facilitating the continued treatment of hyperthyroidism.The 9-mo follow-up showed favorable results.CONCLUSION This case highlights that atherosclerosis is a cause of ACS that cannot be ignored even in a patient with hyperthyroidism.
文摘Chinese martial arts have a long history, profound, which is an integral part of Chinese traditional culture of grandeur. China joined the WTO and the Beijing Olympic Games ＂has a rich cultural heritage of thousands of years of Chinese martial arts with its unique charm and much of the world＇ s attention.＂ In the face of opportunities and challenges, the international spread of martial arts has become an irresistible trend. ＂First of propagation, the spread of the concept of martial arts and martial arts were defined international spread, and it were explains martial international spread of cultural level societal level and significance of the economic level, dialectical judge the outcome of the international transmission acquired with the problems.＂ Secondly, the traditional martial arts culture for martial international dissemination presented aphasia phenomenon, by means of the analysis of the advanced nature of martial arts culture, the martial arts and cultural heritage considered as the center of gravity advantages, not only to absorb the multicultural essence of martial arts culture useful, but also highlight the ethnic characteristics of martial arts culture, martial arts culture to enhance capacity external radiation, the Chinese martial arts as a complete all- round cultural forms, multi-level, multi-an^le display, promote the Chinese martial arts to the world in a more in-depth. ＂
文摘Based oil the models of dopanmine reccptors and tetrahydroprolobotherine complexes.we carried cul semiempiricalquantum of cmical calculations on the active sites of rcceptors and ligands. The results showed that foe frontier melccular orbitals oflignod and receplor just matched cach other.which suggerted that ligand and receptor might form charge-transfer interaction.
