Southwest University

About: Southwest University is a education organization based out in Chongqing, China. It is known for research contribution in the topics: Population & Bombyx mori. The organization has 29772 authors who have published 27755 publications receiving 409441 citations. The organization is also known as: Southwest University in Chongqing & SWU.

Controlled synthesis of FeP nanorod arrays as highly efficient hydrogen evolution cathode

Abstract: For the first time, self-supported FeP nanorod arrays were developed on a HCl-treated Ti foil (FeP NAs/Ti) via low-temperature phosphidation of α-FeO(OH)/Ti precursor and were further used as a novel hydrogen evolution cathode (HER), demonstrating exceptional catalytic activity in acidic media, superior to all reported non-Pt HER electrocatalysts, while offering an innovative method to synthesize metal phosphides with well-controlled nanostructure and morphology.

Impact of η(c) hadroproduction data on charmonium production and polarization within the nonrelativistic QCD framework.

Abstract: With the recent LHCb data on ${\ensuremath{\eta}}_{c}$ production and based on heavy quark spin symmetry, we obtain the long-distance matrix elements for both ${\ensuremath{\eta}}_{c}$ and $J/\ensuremath{\psi}$ productions, among which, the color-singlet one for ${\ensuremath{\eta}}_{c}$ is obtained directly by the fit of experiment for the first time. Using our long-distance matrix elements, we can provide good description of the ${\ensuremath{\eta}}_{c}$ and $J/\ensuremath{\psi}$ hadroproduction measurements. Our predictions on $J/\ensuremath{\psi}$ polarization are in good agreement with the LHCb data, explain most of the CMS data, and pass through the two sets of CDF measurements in the medium ${p}_{t}$ region. Considering all the possible uncertainties carefully, we obtained quite narrow bands of the $J/\ensuremath{\psi}$ polarization curves.

Repression of tyrosine hydroxylase is responsible for the sex-linked chocolate mutation of the silkworm, Bombyx mori

Abstract: Pigmentation patterning has long interested biologists, integrating topics in ecology, development, genetics, and physiology. Wildtype neonatal larvae of the silkworm,Bombyx mori, are completely black. By contrast, the epidermis and head of larvae of the homozygous recessive sex-linked chocolate (sch) mutant are reddish brown. When incubated at 30 °C, mutants with the sch allele fail to hatch; moreover, homozygous mutants carrying the allele sch lethal (sch l ) do not hatch even at room temperature (25 °C). By positional cloning, we narrowed a region containing sch to 239,622 bp on chromosome 1 using 4,501 backcross (BC1) individuals. Based on expression analyses, the best sch candidate gene was shown to be tyrosine hydroxylase (BmTh). BmTh coding sequences were identical among sch, sch l , and wild-type. However, in sch the ∼70-kb sequence was replaced with ∼4.6 kb of a Tc1mariner type transposon located ∼6 kb upstream of BmTh, and in sch l , a large fragment of an L1Bm retrotransposon was inserted just in front of the transcription start site of BmTh. In both cases, we observed a drastic reduction of BmTh expression. Use of RNAi with BmTh prevented pigmentation and hatching, and feeding of a tyrosine hydroxylase inhibitor also suppressed larval pigmentation in the wild-type strain, pnd + and in a pS (black-striped) heterozygote. Feeding L-dopa to sch neonate larvae rescued the mutant phenotype from chocolate to black. Our results indicate the BmTh gene is responsible for the sch mutation, which plays an important role in melanin synthesis producing neonatal larval color.