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Baosheng Shen,Chunxiao Du,Wei Wang,Dan Yu 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12
With the increasingly serious water pollution and human health problems caused by oily wastewater, the task ofdeveloping new and efficient oil-water separation materials is becoming urgent. Electrospun nanofiber membranes have beenapplied to this field due to their high porosity and uniform pore size, but the preparation and mechanism of hydrophilicnanofiber membranes, which can be used in the part of underwater oleophobicity still need to be explored. Herein, we firstlyprepare nanofiber membranes containing sulfhydryl groups on the surface by electrostatic spinning of polyacrylonitrile and γ-mercaptopropyltriethoxysilane together, which becomes active sites for the grafting of dimethyldiallylammonium chloridemonomers by thiol-ene click chemistry. The resulting modified membranes exhibited hydrophilicity in air and oleophobicityin water, and demonstrated good emulsion separation performance of extremely high permeation flux (742.6 L/(m2·h)),excellent separation efficiency (>96 %), as well as outstanding antifouling performance thanks to the existence of hydrationlayer on the membrane when underwater. In addition, the membranes can maintain stable hydrophilicity and underwateroleophobicity in complex environments, and display good acid and alkali resistance.
장우종,장예은,조우현,이세현,심현아,박지영,Jiang Xu,Xiaofeng Shen,Baosheng Liao,조익현,김영창,양태진 한국육종학회 2022 Plant Breeding and Biotechnology Vol.10 No.3
Cultivation of the medicinal herb Panax ginseng Meyer began by domesticating wild mountain ginsengs severalhundred years ago in Korea. Elucidating the diversity of the maternally inherited plastid genome (plastome) in diverse ginsengcollections including wild ginsengs would provide valuable information on ginseng breeding and cultivation history. We sequencedand compared the plastomes of 44 ginseng accessions collected from various Northeast Asian countries. The plastomes revealed 18polymorphic sites, including 11 SNPs and 7 InDels, which portrayed less diversity than in the most closely related species, P. quinquefolius. We developed 10 kompetitive allele-specific PCR (KASP) markers and utilized them along with four previouslydeveloped InDel markers to characterize the genotypes of 203 ginseng accessions. Digital genotyping based on the developed KASPmarkers classified the accessions into 10 main and 2 branching haplotypes. Four InDel markers derived from different copy numbers oftandem repeats showed dynamic subgrouping within the haplotypes due to the occurrence of multi-alleles and reversible mutations. Thedigital haplotype genotyping (haplotyping) revealed that haplotype A, representing 60.1% of the accessions, might be the originalplastome form without any SNP occurrence. Accumulation patterns of the variations suggest that nine main haplotypes (B-J) divergedindependently by new SNP occurrences from the original plastome, and branching haplotypes may have derived from the first mutantlineage by additional SNP deposition. The digital haplotyping system based on plastome diversity deepens understanding of ginsengevolution and serves as a useful molecular breeding tool.