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423 papers found.
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SU(3) analysis of weak decays of doubly-heavy tetraquarks \({b\bar{c}}{q\bar{q}}\)

We study the weak decays of exotic tetraquark states \({b\bar{c}}{q\bar{q}}\) with two heavy quarks. Under the SU(3) symmetry for light quarks, these tetraquarks can be classified into an octet plus a singlet: \(3\bigotimes \bar{3}=1\bigoplus 8\). We will concentrate on the octet tetraquarks with \(J^{P}=0^{+}\), and study their weak decays, both semileptonic and nonleptonic...

Thermodynamic controls of the Western Tibetan Vortex on Tibetan air temperature

The “Western Tibetan Vortex” (WTV)—also termed the Karakoram Vortex—dominates the middle-to-lower troposphere and the near-surface air temperature variability above the western Tibetan Plateau (TP). Here, we explore the thermodynamic mechanisms through which the WTV modulates air temperature over the western TP by diagnosing the three major terms of the thermodynamic energy...

Chemical Constituents from Mentha haplocalyx Briq. (Mentha canadensis L.) and Their α-Glucosidase Inhibitory Activities

and affiliations Xiao-Feng HeChang-An GengXiao-Yan HuangYun-Bao MaXue-Mei ZhangJi-Jun Chen Open Access Original Article First Online: 29 April 2019 42 Downloads Abstract Mentha haplocalyx ... , and indicate if changes were made. Authors and Affiliations Xiao-Feng He123Chang-An Geng12Xiao-Yan Huang12Yun-Bao Ma12Xue-Mei Zhang12Ji-Jun Chen123Email authorView author's OrcID profile1.State Key

Proteomics of the corpus callosum to identify novel factors involved in hypomyelinated Niemann-Pick Type C disease mice

Hypomyelination in the central nerves system (CNS) is one of the most obviously pathological features in Niemann-Pick Type C disease (NPC), which is a rare neurodegenerative disorder caused by mutations in the NPC intracellular cholesterol transporter 1 or 2 (Npc1 or Npc2). Npc1 plays key roles in both neurons and oligodendrocytes during myelination, however, the linkage between...

Effects of trace Cr on as-cast microstructure and microstructural evolution of semi-solid isothermal heat treatment ZC61 magnesium alloy

magnesium alloy AuthorsAuthors and affiliations Xiao-feng HuangYa-jie MaQiao-qiao ZhangLang-lang WeiJian-qiao Yang Research & Development First Online: 29 January 2019 4 Downloads Abstract The ... Cr is added to the ZC61 alloy. Key wordsZC61 magnesium alloy Cr content semi-solid isothermal heat treatment non-dendritic microstructure microstructural evolution  Xiao-feng Huang Male, born in

A comparative study on the validity and reliability of anterior, medial, and posterior approaches for internal fixation in the repair of fractures of the coronoid process of the ulna

process of the ulna Hong-Wei Chen†1Email author and Xiao-Feng Teng†2 †Contributed equally European Journal of Medical Research201823:40 https://doi.org/10.1186/s40001-018-0336-7 ©  The Author(s ... aforementioned surgical approach. Notes Hong-Wei Chen and Xiao-Feng Teng contributed equally to this work Abbreviations MEPS:  Mayo Elbow Performance Score CT:  computed tomography SD:  standard

RNA N6-methyladenosine demethylase FTO promotes breast tumor progression through inhibiting BNIP3

 Sun1, Yuan Wang6, Xi Li3, Xiao-feng Xiong1, Bo Wei3Email author, Xiaobin Wu2Email author and Guohui Wan1, 7Email authorView ORCID ID profile Molecular Cancer201918:46 https://doi.org/10.1186/s12943

Palladium-Catalyzed Synthesis of Aldehydes from Aryl Iodides and Formic acid with Propylphosphonic Anhydride as the Activator

An interesting palladium-catalyzed carbonylative procedure for the synthesis of aromatic aldehydes from aryl iodides has been developed. By using propylphosphonic anhydride as the activator for formic acid, moderate to good yields of the corresponding aldehydes were produced with formic acid as the carbonyl and hydrogen donors. Interestingly, neither additional phosphine ligand...

Copper/iron co-catalyzed alkoxycarbonylation of unactivated alkyl bromides

Carbonylative transformations of alkyl bromides have been explored less than those of aryl halides, in part because of the high barrier to activation of aryl bromides. Additionally, alkyl-metal reagents formed in situ can tend to undergo β-hydride elimination. Here we describe a copper/iron co-catalyzed alkoxycarbonylation of unactivated alkyl bromides. In the presence of...

Nickel-catalysed carbonylative homologation of aryl iodides

Homologation is an important organic transformation which extends the carbon chain of a parent molecule, and many procedures have been established. However, although carbonylation reactions are now well developed as valuable methods for the synthesis of carbonyl-containing compounds, studies of carbonylative homologation are limited. Here we report a nickel-catalysed...

The Different Roles of hRAD50 in Microsatellite Stable and Unstable Colorectal Cancers

RAD50 protein is essential for DNA double-strand break repair and maintaining genomic integrity. In this study, we investigated the clinicopathological significance of hRAD50 expression and mutation in microsatellite stable (MSS) and unstable (MSI) colorectal cancers (CRCs). hRAD50 expression was examined in primary CRC (n=268), the corresponding distant (n=69) and adjacent...

The Effects of Safflower Yellow on Acute Exacerbation of Chronic Obstructive Pulmonary Disease: A Randomized, Controlled Clinical Trial

Xiao-feng Ou,1 Jin Liu,4 and Yun-xia Zuo4 1Intensive Care Unit, West China Hospital of Sichuan University, Chengdu 610041, China 2Intensive Care Unit, The Third People’s Hospital of Chengdu City ... analysis; Xiao-feng Ou contributed to investigation; Yan Kang contributed to project administration; Jin Liu contributed to supervision; Yun-xia Zuo contributed to validation; Ru-rong Wang contributed to

A two-microRNA signature as a diagnostic and prognostic marker of pancreatic adenocarcinoma

A two-microRNA signature as a diagnostic and prognostic marker of pancreatic adenocarcinoma Yang Yu,* Xiao Feng,* Shundong Cang Department of Oncology, Henan Province People’s Hospital, Henan

The Different Roles of hRAD50 in Microsatellite Stable and Unstable Colorectal Cancers

RAD50 protein is essential for DNA double-strand break repair and maintaining genomic integrity. In this study, we investigated the clinicopathological significance of hRAD50 expression and mutation in microsatellite stable (MSS) and unstable (MSI) colorectal cancers (CRCs). hRAD50 expression was examined in primary CRC (n=268), the corresponding distant (n=69) and adjacent...

Adult neurogenic deficits in HIV-1 Tg26 transgenic mice

Even in the antiretroviral treatment (ART) era, HIV-1-infected patients suffer from milder forms of HIV-1-associated neurocognitive disorders (HAND). While the viral proteins Tat and gp120 have been shown to individually inhibit the proliferation and neural differentiation of neural stem cells (NSCs), no studies have characterized the effects of all the combined viral proteins on...

Predictive value of the maximum serum creatinine value and growth rate in acute paraquat poisoning patients

-Xiao Feng, Wei-Shuyi Ruan & Yuan-Qiang LuSchool of Mathematical Sciences, Zhejiang University, Hangzhou, People’s Republic of ChinaYu-Ning Li AuthorsSearch for Meng-Xiao Feng in:Nature Research journals

A new preparation technology of structural-gradient materials without a brittle transition zone in a Mn-Si-Cr-B bainitic cast steel

steel, which has potential for practical application for dual-property automobile parts. Key wordsbainitic cast steel gradient cooling heat treatment structural-gradient-materials  Xiao-feng Xu Male

Effects of heat treatment on microstructure and mechanical properties of Mg-6Zn-4Sm-0.4Zr alloy

affiliations Xiao-feng HuangYu ZhangFeng GuoJian-chang YangYing MaYuan Hao Research & Development First Online: 08 August 2018 Received: 31 July 2017 Accepted: 20 September 2017 9 Downloads ... -granular and cleavage modes. KeywordsMg-6Zn-4Sm-0.4Zr alloy heat treatment microstructure evolution mechanical properties fracture mode  Xiao-feng Huang Male, born in 1971, Ph. D., Associate professor

PINCH Expression and Its Significance in Esophageal Squamous Cell Carcinoma

Particularly interesting new cysteine-histidine rich protein (PINCH), as a newly discovered protein of LIM family members, may play a role in signal transduction of integrin and growth factor, and involved in the incidence and development of tumors. PINCH protein is overexpressed in tumor-associated stroma of several types of tumors. However, there is no study of the PINCH in...