您现在的位置: 首页> 研究主题> single

single

single的相关文献在1989年到2022年内共计461篇,主要集中在肿瘤学、化学、内科学 等领域,其中期刊论文420篇、会议论文1篇、专利文献40篇;相关期刊155种,包括中国科学、金属学报:英文版、中国稀土学报:英文版等; 相关会议1种,包括第三届国际信息技术与管理科学学术研讨会等;single的相关文献由1674位作者贡献,包括Geoffroy Auvert、S. Suresh、刘俭等。

single—发文量

期刊论文>

论文:420 占比:91.11%

会议论文>

论文:1 占比:0.22%

专利文献>

论文:40 占比:8.68%

总计:461篇

single—发文趋势图

single

-研究学者

  • Geoffroy Auvert
  • S. Suresh
  • 刘俭
  • 刘鹏飞
  • 廖必真
  • 曾龙飞
  • 李力
  • 李勇
  • 李季学
  • 江洪
  • 期刊论文
  • 会议论文
  • 专利文献

搜索

排序:

年份

期刊

关键词

    • Qi-Yun Xiao; Xiu-Cai Fang; Xiao-Qing Li; Gui-Jun Fei
    • 摘要: Genetic polymorphism is associated with irritable bowel syndrome(IBS)in terms of susceptibility and clinical manifestations.Previous studies have shown that genetic polymorphism might play a key role in the onset and progression of IBS by modulating components of its pathogenesis such as the gut-brain axis,gastrointestinal motility,inflammatory activity,and immune status.Although underlying pathophysiological mechanisms have not been fully clarified,the potential ethnic differences that are present in worldwide genetic studies of IBS deserve attention.This review surveyed numerous studies focusing on IBSassociated single nucleotide polymorphisms,and investigated the ethnic disparities revealed by them.The results demonstrate the need for more attention on ethnic factors in IBS-related genetic studies.Taking ethnic backgrounds into accounts and placing emphasis on disparities potentially ascribed to ethnicity could help lay a solid and generalized foundation for transcultural,multi-ethnic,or secondary analyses in IBS,for example,a meta-analysis.Broader genetic studies considering ethnic factors are greatly needed to obtain a better understanding of the pathophysiological mechanisms of IBS and to improve the prevention,intervention,and treatment of this disease.
    • Tomislav Kelava; Petra Turcic; Antonio Markotic; Ana Ostojic; Dino Sisl; Anna Mrzljak
    • 摘要: Although,liver transplantation serves as the only curative treatment for patients with end-stage liver diseases,it is burdened with complications,which affect survival rates.In addition to clinical risk factors,contribution of recipient and donor genetic prognostic markers has been extensively studied in order to reduce the burden and improve the outcomes.Determination of single nucleotide polymorphisms(SNPs)is one of the most important tools in development of personalized transplant approach.To provide a better insight in recent developments,we review the studies published in the last three years that investigated an association of recipient or donor SNPs with most common issues in liver transplantation:Acute cellular rejection,development of new-onset diabetes mellitus and non-alcoholic fatty liver disease,hepatocellular carcinoma recurrence,and tacrolimus concentration variability.Reviewed studies confirmed previously established SNP prognostic factors,such as PNPLA3 rs738409 for nonalcoholic fatty liver disease development,or the role of CYP3A5 rs776746 in tacrolimus concentration variability.They also identified several novel SNPs,with a reasonably strong association,which have the potential to become useful predictors of post-transplant complications.However,as the studies were typically conducted in one center on relatively low-to-moderate number of patients,verification of the results in other centers is warranted to resolve these limitations.Furthermore,of 29 reviewed studies,28 used gene candidate approach and only one implemented a genome wide association approach.Genome wide association multicentric studies are needed to facilitate the development of personalized transplant medicine.
    • AFRAH ALKHURIJI; ATEKAH ABDULLAH MOHAMMED ALRAQIBAH; AMAAL AWAD ALHARBI; ZENEB BABAY; FATIMAH BASIL AL-MUKAYNIZI; ARWA ALTHOMALI; SONYA S.ABDEL-RAZEQ; ARJUMAND S.WARSY
    • 摘要: Methylenetetrahydrofolate reductase(MTHFR)deficiency is the most common genetic cause of hyperhomocysteinemia,which has been implicated in the etiology of recurrent spontaneous abortion(RSA).This study was designed to investigate the association between two single nucleotide polymorphisms(SNP)(rs1801133[C677T]and rs1801131[A1298C])in the MTHFR gene and RSA,in Saudis.These two SNPs were selected as these polymorphisms have a different effect on the activity and stability of the enzyme,and significantly diverse effects have been reported in relation to the association with RSA.Ethical approval was acquired from the IRB at King Saud University(KKUH),Saudi Arabia,and written informed consent was obtained from each participant.The study group comprised of 100 Saudi women with unexplained RSA and 100 age-matched controls,both attending KKUH for a routine checkup.Blood was drawn in EDTA tubes,and DNA was extracted.Genotyping was conducted using TaqMan SNP genotyping assay kits.The frequency of the T allele of C677T was 0.165 in patients and 0.17 in controls.Genotype frequencies for CC,CT and TT genotypes were 70%,27%and 3%,respectively in RSA,and 71%,24%and 5%,respectively,in the controls(p>0.05).For the A1298C polymorphism,the C allele frequencies were 0.345 in patients and 0.28 in controls,while genotype frequencies for AA,AC and CC genotypes were 44%,43%,and 13%,respectively,in patients,and 54%,36%,and 10%,respectively,in controls(p>0.05).The frequency of CC genotype and C allele of A1298C were higher in the patients with RSA,but not significantly,while C677T genotypes and allele frequencies did not differ between patients and controls.The results suggested that MTHFR gene polymorphisms are population-specific and may not associate with RSA in Saudi women.
    • Pan Liu
    • 摘要: Objective.To investigate the clinical effect of single-row fixation and non-conjunction compression in the treatment of post small and medium rotator cuff injuries under arthroscopy.Methods.Forty-five patients admitted to our department from June 2018 to May 2019 were enrolled in the study.32 patients in the single-row fixed-group and 13 patients in the non-conjunctival group were randomly assigned.The VAS,ASES,and UCLA scores of the two groups were compared before surgery,one month,three months,and six months after surgery[1].Results.The VAS,ASES,and UCLA scores were significantly higher in those two groups other than the preoperative group.The scores of the two groups were gradually improved from one month,three months,and six months respectively after surgery.At one month,the scores of those two groups were statistically significant(P0.05).Conclusion.Under arthroscopy,the single-row fixation technique and the non-conjunction compression method were used to treat post small and medium rotator cuff injuries.The effect is very significant.In particular,the no-knot sputum method has a significant improvement in restoring postoperative pain,joint activity and joint strength.
    • Prudence Bararunyeretse; Howard O. Beckford; Hongbing Ji
    • 摘要: Discharge of metals and their mineral flotation collectors into the soil environment causes severe ecological and health impacts, which is still not fully understood. This is of great concern, particularly with regards to their effect on the soil microorganisms whose functions determine not only the soil quality and function but also influence the air and water quality. This study aimed to analyze and compare, microcalorimetrically, the single chemical toxic effect with the combined effect of copper (Cu) and two of its main flotation collectors, potassium amyl xanthate (PAX) and sodium isoamyl xanthate (SIAX), on soil microbial community. All chemicals, individually and as a binary mixture of copper and each of its flotation collectors, exhibited a significant dose-effect relationship, and the highest and lowest microbial activity inhibition being associated with SIAX and Cu, respectively (e.g. IC 50 of 447.5, 158.3 and 83.9 μg·g?1 soil for copper, PAX and SIAX, respectively). For all cases, the microbial activity was more affected by the mixture than by the individual mixture components. Increasing the xanthates dose (from 25 to 100 μg·g?1 soil) in the mixture with a copper dose of 200 μg·g?1 soil led to the increase of the microbial activity inhibition rate, from 23.08 % to 53.85% in case of PAX and from 26.92% to 57.69% in case of SIAX). Similarly, the toxicity level of the mixture of equitoxic components doses increased with the increased mixture doses. Since the observed activity level can be attributed to the surviving microbes, capable of adapting to both chemical and their mixture, a genetically based analysis should be conducted to allow identifying and characterizing the potentially resistant strains that can be useful for the remediation of the pollution by copper and xanthates and for the sustainability of copper mining and flotation, and for all soil, water, and air quality and function interest.
    • Xin Cao; Michael Zopf; Fei Ding
    • 摘要: Single photon sources are key components for quantum technologies such as quantum communication, computing and metrology. A key challenge towards the realization of global quantum networks are transmission losses in optical fibers. Therefore, single photon sources are required to emit at the low-loss telecom wavelength bands. However, an ideal telecom wavelength single photon source has yet to be discovered. Here, we review the recent progress in realizing such sources. We start with single photon emission based on atomic ensembles and spontaneous parametric down conversion, and then focus on solid-state emitters including semiconductor quantum dots, defects in silicon carbide and carbon nanotubes. In conclusion, some state-of-the-art applications are highlighted.
    • Takaaki Fujita; Koichi Yamazaki
    • 摘要: The concept of linear tangle was introduced as an obstruction to mixed searching number. The concept of (maximal) single ideal has been introduced as an obstruction to linear-width. Moreover, it was already known that mixed search number is equivalent to linear-width. Hence, by combining those results, we obtain a proof of the equivalence between linear tangle and maximal single ideal. This short report gives an alternative proof of the equivalence.
    • Yating Lin; Yongzheng Ye; Wei Fang
    • 摘要: Single-photon sources are building blocks for photonic quantum information processes. Of the many single-photon generation schemes, electrically driven single-photon sources have the advantages of realizing monolithic integration of quantum light sources and detectors without optical filtering, thus greatly simplify the integrated quantum photonic circuits. Here, we review recent advances on electrically driven single-photon sources based on solid-state quantum emitters, such as semiconductor epitaxial quantum dots, colloidal quantum dots, carbon nanotubes, molecules, and defect states in diamond, SiC and layered semiconductors. In particular, the merits and drawbacks of each system are discussed. Finally, the article is concluded by discussing the challenges that remain for electrically driven single-photon sources.
    • Shuliang Ren; Qinghai Tan; Jun Zhang
    • 摘要: The solid state single photon source is fundamental key device for application of quantum communication, quantum computing, quantum information and quantum precious metrology. After years of searching, researchers have found the single photon emitters in zero-dimensional quantum dots (QDs), one-dimensional nanowires, three-dimensional wide bandgap materials, as well as two-dimensional (2D) materials developed recently. Here we will give a brief review on the single photon emitters in 2D van der Waals materials. We will firstly introduce the quantum emitters from various 2D materials and their characteristics. Then we will introduce the electrically driven quantum light in the transition metal dichalcogenides (TMDs)-based light emitting diode (LED). In addition, we will introduce how to tailor the quantum emitters by nanopillars and strain engineering, the entanglement between chiral phonons (CPs) and single photon in monolayer TMDs. Finally, we will give a perspective on the opportunities and challenges of 2D materials-based quantum light sources.
    • Xu Wang; Lei Xu; Yun Jiang; Zhouyang Yin; Christopher C. S. Chan; Chaoyong Deng; Robert A. Taylor
    • 摘要: Single-photon emitters (SPEs) are one of the key components in quantum information applications. The ideal SPEs emit a single photon or a photon-pair on demand, with high purity and distinguishability. SPEs can also be integrated in photonic circuits for scalable quantum communication and quantum computer systems. Quantum dots made from Ⅲ-Ⅴ compounds such as InGaAs or GaN have been found to be particularly attractive SPE sources due to their well studied optical performance and state of the art industrial flexibility in fabrication and integration. Here, we review the optical and optoelectronic properties and growth methods of general SPEs. Subsequently, a brief summary of the latest advantages in Ⅲ-Ⅴ compound SPEs and the research progress achieved in the past few years will be discussed. We finally describe frontier challenges and conclude with the latest SPE fabrication science and technology that can open new possibilities for quantum information applications.
  • 查看更多

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号