检索结果-南通市图书馆

Equitable Vertex Arboricity Conjecture Holds for Graphs with Low Degeneracy

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2021年第8期37卷 1293-1302页

作者： Xin ZHANG bei niu Yan LI Bi LI School of Mathematics and Statistics Xidian UniversityXi’an 710071P.R.China

The equitable tree-coloring can formulate a structure decomposition problem on the communication network with some security ***,an equitable tree-Zc-coloring of a graph is a vertex coloring using k distinct colors such that every color class induces a forest and the sizes of any two color classes differ by at most *** this paper,we show some theoretical results on the equitable tree-coloring of graphs by proving that every d-degenerate graph with maximum degree at most Δ is equitably tree-fc-colorable for every integer k≥(Δ+1)/2 provided that Δ≥9.818d,confirming the equitable vertex arboricity conjecture for graphs with low degeneracy.

关键词： Equitable coloring tree-coloring vertex arboricity degeneracy

在线全文

学校读者我要写书评

暂无评论

数字经济对中国新时代城乡关系的影响

陕西开放大学学报 2024年第3期26卷 68-71,76页

作者：牛蓓王慧茵王晓玲陕西开放大学工商教务处陕西西安710119 陕西开放大学学前师范学院陕西西安710119 陕西开放大学党委学生工作部陕西西安710119

数字经济作为一种新的主要经济形态,驱动着生产方式、生活方式和治理方式发生深刻变革。数字经济具有非竞争性、网络外部性、去中心化和大数据取代物质材料成为关键投入品等特性,使得数字经济可以通过弥合城乡数字鸿沟,缩小城乡要素、... 详细信息

数字经济作为一种新的主要经济形态,驱动着生产方式、生活方式和治理方式发生深刻变革。数字经济具有非竞争性、网络外部性、去中心化和大数据取代物质材料成为关键投入品等特性,使得数字经济可以通过弥合城乡数字鸿沟,缩小城乡要素、效率、生活、治理等各方面差距。数字经济在城乡社会生产中的应用与推广加速了城乡融合的历史进程。在数字经济影响之下,中国城乡关系将从城市引领融合向城乡协同融合发展转变,在发展载体上县城将成为推动城乡融合发展的关键,城乡要素结构和要素质量差距将进一步缩小,同时借助数字经济实现扩大内需和城乡基础设施补短板的两难自解以及在社会治理能力和治理体系现代化的过程中实现城乡共治。

关键词：数字经济城乡关系城乡融合发展

维普期刊数据库博看期刊

Genomic Disruption of FOXL2 in Blepharophimosis-Ptosis-Epicanthus Inversus Syndrome Type 2： A Novel Deletion-Insertion Compound Mutation

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2018年第19期131卷 2380-2383页

作者： bei-bei niu Ning Tang Qin Xu Pei-Wei Chai Scientific Research Center Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200092 China Department of Ophthalmology Ninth People's Hospital Shanghai Jiao Tong University School of Medicine Shanghai 200025 China

To the Editor：Blepharophimosis-ptosis-epicanthus inversus syndrome （BPES;OMIM#110100） is featured by malformation of the eyelid,including ptosis,epicanthus inversus,telecanthus,and reduction of the horizontal fissure length with a prevalence of 1 in 50,000.[1-3] If not well treated,BPES could result in strabismus and amblyopia.[4] So far,BPES has been divided into two categories：Type Ⅰ is characterized by ocular symptoms with premature ovarian failure （POF）,while POF is absent in Type Ⅱ.

关键词： TRANSCRIPTION FACTOR FOXL2 CHINESE FAMILIES BPES EXPRESSION EVOLUTION

妊娠期糖尿病对母乳喂养的12周龄婴儿肠道菌群影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

临床儿科杂志 2024年第4期42卷 305-310页

作者：赵永丽段一凡牛蓓张翠陈磊雍明媛刘长青河北省疾病预防控制中心河北石家庄050021 中国疾病预防控制中心营养与健康所北京100050

目的比较妊娠期糖尿病(GDM)及正常孕妇的持续母乳喂养的12周龄婴儿肠道菌群的分布特点,以探索GDM对12周龄婴儿肠道菌群的影响。方法选择2016年6月—2019年12月入组的母亲及其随访至12周龄的母乳喂养的婴儿,依据母亲孕期血糖检测结果将... 详细信息

目的比较妊娠期糖尿病(GDM)及正常孕妇的持续母乳喂养的12周龄婴儿肠道菌群的分布特点,以探索GDM对12周龄婴儿肠道菌群的影响。方法选择2016年6月—2019年12月入组的母亲及其随访至12周龄的母乳喂养的婴儿,依据母亲孕期血糖检测结果将母乳喂养婴儿分为GDM组(n=13)和对照组(n=27)。采集婴儿12周龄粪便,采用16S rDNA高通量测序技术对所有粪便样本进行检测,比较两组肠道菌群分布特点。采用Spearman相关分析法分析肠道菌群与孕期血糖、婴儿体重的相关性。结果共纳入40对研究对象,GDM组13对,对照组27对。两组的优势菌门均为放线菌门、厚壁菌门和变形菌门,GDM组的疣微菌门相对丰度高于对照组,差异有统计学意义(Z=2.233,P2),而在对照组中芽孢杆菌目、孪生球菌属、丹毒梭菌属的丰度明显升高(LDA>2)。肠道优势菌群的门水平丰度与孕期血糖、12周龄婴儿体重均不相关(P>0.05)。结论孕期GDM对持续母乳喂养的12周龄婴儿肠道菌群构成产生一定的影响。

关键词：妊娠糖尿病母乳喂养肠道菌群 16SrDNA 高通量测序

黑牛肝菌多糖提取工艺比较及其体外抗氧化活性研究

在线全文

学校读者我要写书评

暂无评论

资源开发与市场 2024年第3期40卷 437-443页

作者：王俊杰牛蓓时小东胡凯丹徐莺成都大学食品与生物工程学院四川成都610106 成都大学基础医学院四川成都610106 四川大学生命科学学院四川成都610065

以得率为标准,从3种多糖提取方法(热水提取法、超声提取法、超声辅助复合酶法)中筛选并优化出黑牛肝菌多糖的最佳提取流程,进而获取黑牛肝功多糖体外抗氧化活性信息。利用单因素实验选出多糖得率最高提取法,利用响应面法进一步优化提取... 详细信息

以得率为标准,从3种多糖提取方法(热水提取法、超声提取法、超声辅助复合酶法)中筛选并优化出黑牛肝菌多糖的最佳提取流程,进而获取黑牛肝功多糖体外抗氧化活性信息。利用单因素实验选出多糖得率最高提取法,利用响应面法进一步优化提取方法,采用分级醇沉法对多糖进行分级,采用DPPH自由基清除法、ABTS自由基清除法、羟自由基清除法以及还原力测定法了解黑牛肝菌多糖的体外抗氧化活性。结果发现:热水提取法、超声提取法、超声辅助复合酶提取法的多糖得率分别为5.64%、6.74%、18.47%。优化后的超声辅助复合酶提取法最佳工艺方案为:复合酶比例(m纤维素酶:m蛋白酶)2:1,酶解温度42.7℃,酶解时间67 min,酶添加量为1.92%,超声时间为20 min,预期得率18.867%;各级醇沉黑牛肝菌多糖均具有良好的抗氧化活性,抗氧化能力与多糖浓度和醇沉浓度呈正比,80%乙醇沉淀获得的多糖综合体外抗氧化活性最佳。超声辅助复合酶提取法可显著提高黑牛肝菌多糖得率,获得的黑牛肝菌多糖具有良好的体外抗氧化活性。

关键词：黑牛肝菌多糖提取方法分级醇沉体外抗氧化活性

Comparative Analysis of the Transcriptome and Metabolome in Leaves of Diploid and Tetraploid Fagopyrum tataricum

在线全文

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2023年第11期92卷 3149-3162页

作者： Xiaodong Shi Yue Qi Liangzhu Lin Jia Wang Xiaobo Qin bei niu Key Laboratory of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsSchool of Food and Biological EngineeringChengdu UniversityChengdu610106China Sichuan Provincial Academy of Natural Resource Sciences Chengdu610015China School of Preclinical Medicine Chengdu UniversityChengdu610106China

Tartary buckwheat(Fagopyrum tataricum)is a dual-purpose medicinal and food crop grown for its high contents of functional compounds and abundant *** studies have shown the differences of total flavonoid content in Tartary buckwheat at different ploidy levels,the composition of flavonoid and its regulatory mechanisms are largely *** this study,the leaf metabolome and transcriptome of diploid and tetraploid accessions of Tartary buckwheat were analyzed to gain insight into the impact of polyploidization on comparative secondary metabolite composition and molecular regulatory *** on a widely targeted metabolomics analysis,a total of 792 metabolites were identified,including 127 *** accumulation of 127 metabolites and expression of 3871 genes differed significantly between diploid and tetraploid Tartary *** metabolomics and transcriptome analysis revealed that chromosome doubling up-regulated the expression of upstream genes in the flavonoid biosynthesis pathway to promote the accumulation of *** present results contribute to elucidation of the molecular mechanism of phenotypic variation associated with polyploidy in Tartary *** findings provide a reference for further studies on phenotypic traits in polyploid Tartary buckwheat,the cloning of crucial regulatory genes,and utilization of genetic engineering technologies in the breeding of Tartary buckwheat.

关键词： Tartary buckwheat diploid tetraploid leaf

Analysis of Seed Phenotypic and Metabolic Characteristics of Diploid and Tetraploid Tartary Buckwheat

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2022年第9期91卷 1973-1986页

作者： Xiaodong Shi Cong Wang Wenjian Li Hanlei Xiao Yanjie Li bei niu Key Laboratory of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsSchool of Food and Biological EngineeringChengdu UniversityChengdu610106China School of Preclinical Medicine Chengdu UniversityChengdu610106China

Polyploid plants grow well,are stress tolerant,and are rich in nutrients and bioactive ***,they are useful for improving crop quality and *** this study,we compared the seed characteristics and metabolite profiles of diploid and tetraploid tartary buckwheat,which was developed via an artificially induced chromosome doubling *** length,width,area,and thousand-grain weight were greater for the tetraploid seeds than for the diploid ***,the germination rate decreased for the tetraploid ***,there was a gap between the shell and kernel of the tetraploid ***,the water absorption rate was higher for the tetraploid than for the diploid *** doubling increased the seed total flavonoid content and deepened the seed color.A principal component analysis of the ultrahigh-pressure liquid chromatography-high resolution mass spectrometry data revealed the clear separation between the diploid and tetraploid *** orthogonal partial least squares-discriminant analysis and other multivariate statistical analyses identified 83 differentially abundant compounds,with most of the flavonoid metabolites more abundant in the tetraploid than in the diploid *** on tartary buckwheat polyploidy may result in enhanced germplasm resources and may clarify the mechanism underlying the biosynthesis of bioactive compounds.

关键词： Tartary buckwheat diploid tetraploid seed

Laparoscopic restorative proctocolectomy with ileal pouch-anal anastomosis for Peutz-Jeghers syndrome with synchronous rectal cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2016年第22期22卷 5293-5296页

作者： Min-Er Zhong bei-Zhan niu Wu-Yang Ji Bin Wu Depart-ment of General Surgery Peking Union Medical College Hospital

We report on a patient diagnosed with PeutzJeghers syndrome(PJS) with synchronous rectal cancer who was treated with laparoscopic restorative proctocolectomy with ileal pouch-anal anastomosis(IPAA). PJS is an autosomal dominant syndrome characterized by multiple hamartomatous polyps in the gastrointestinal tract, mucocutaneous pigmentation, and increased risks of gastrointestinal and nongastrointestinal cancer. This report presents a patient with a 20-year history of intermittent bloody stool, mucocutaneous pigmentation and a family history of PJS, which together led to a diagnosis of PJS. Moreover, colonoscopy and biopsy revealed the presence of multiple serried giant pedunculated polyps and rectal adenocarcinoma. Currently, few options exist for the therapeutic management of PJS with synchronous rectal cancer. For this case, we adopted an unconventional surgical strategy and ultimately performed laparoscopic restorative proctocolectomy with IPAA. This procedure is widely considered to be the first-line treatment option for patients with ulcerative colitis or familial adenomatous polyposis. However, there are no previous reports of treating PJS patients with laparoscopic IPAA. Since the operation, the patient has experienced no further episodes of gastrointestinal bleeding and has demonstrated satisfactory bowel control. Laparoscopic restorative proctocolectomy with IPAA may be a safe and effective treatment for patients with PJS with synchronous rectal cancer.

关键词： Peutz-Jeghers syndrome Laparoscopy Ileal pouch-anal anastomosis Restorative proctocolectomy Multiple polyps in gastrointestinal tract

应对新信息技术变革的跨学科护理专业虚拟教研室构建路径

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国当代医药 2024年第19期31卷 144-148页

作者：李辉刘燕牛蓓杨挺任娟付译节成都大学基础医学院四川成都610106 成都大学附属医院医院感染管理部四川成都610081

以生成式人工智能为代表的新一轮信息技术变革正在深刻地影响着护理实践,当前大部分护理院校进行的护理专业教育困窘于强调知识、技能的传统医科知识体系的学习环境中,许多从事高等护理教育的教师在面对培养复合型护理人才使命时,难以... 详细信息

以生成式人工智能为代表的新一轮信息技术变革正在深刻地影响着护理实践,当前大部分护理院校进行的护理专业教育困窘于强调知识、技能的传统医科知识体系的学习环境中,许多从事高等护理教育的教师在面对培养复合型护理人才使命时,难以适应新信息技术变革对多学科、多方位复合型护理人才能力的培养要求,急需与工、理、文、信息等学科教师跨界融合,组成跨学科教学共同体。虚拟教研室的出现为实现护理专业教师与工、理、文、信息等学科专业教师跨界融合提供了重要途径。笔者从应对新信息技术变革的护理专业虚拟教研室成员的遴选模式、组织管理形式、多功能硬件平台建设、云端共享护理专业教学资源制作、教学学术活动开展、教研室文化培育、教研室内部学术规范和知识产权保护制度制定方面,对新信息技术变革背景下的跨学科护理专业虚拟教研室构建路径进行了探讨,为相关护理虚拟教研室构建提供思路。

关键词：护理专业虚拟教研室新信息技术变革构建路径