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Swelling/Deswelling Self-Oscillating of Microgels Induced by the BZ Reaction with Fe(phen)3 Catalyst
Jie Ren,Jinfen Gu,Li Tao,Guangcheng Zhang,Wu Yang 한국고분자학회 2016 Macromolecular Research Vol.24 No.6
A novel kind of microgels, poly(NIPAAm-co-Fe(phen)3-co-AAc), were prepared by copolymerization N-isopropylacrylamide (NIPAAm), acrylic acid (AAc) and iron(II) 5-acrylamide-1,10-phenanthroline-bi(1,10-phenanthroline) (Fe(phen)3), the catalyst for the Belousov-Zhabotinsky (BZ) reaction. The microgels were characterized by FT-IR spectroscopy, X-ray photoelectron spectroscopy (XPS), dynamic light scattering (DLS) and scanning electron microscope (SEM). In addition, the self-oscillating behaviors of the microgels were investigated in BZ system free of catalyst. Both the redox potential and transmittance self-oscillation were observed. Moreover, the amplitudes of poly(NIPAAm-co-Fe(phen)3-co-AAc) microgels are much larger than those of linear polymer and gel. This advantage originated from the special structure, size and composition of the microgels.
The genome of the cucumber, Cucumis sativus L.
Huang, Sanwen,Li, Ruiqiang,Zhang, Zhonghua,Li, Li,Gu, Xingfang,Fan, Wei,Lucas, William J,Wang, Xiaowu,Xie, Bingyan,Ni, Peixiang,Ren, Yuanyuan,Zhu, Hongmei,Li, Jun,Lin, Kui,Jin, Weiwei,Fei, Zhangjun,Li Nature Publishing Group 2009 Nature genetics Vol.41 No.12
Cucumber is an economically important crop as well as a model system for sex determination studies and plant vascular biology. Here we report the draft genome sequence of Cucumis sativus var. sativus L., assembled using a novel combination of traditional Sanger and next-generation Illumina GA sequencing technologies to obtain 72.2-fold genome coverage. The absence of recent whole-genome duplication, along with the presence of few tandem duplications, explains the small number of genes in the cucumber. Our study establishes that five of the cucumber's seven chromosomes arose from fusions of ten ancestral chromosomes after divergence from Cucumis melo. The sequenced cucumber genome affords insight into traits such as its sex expression, disease resistance, biosynthesis of cucurbitacin and 'fresh green' odor. We also identify 686 gene clusters related to phloem function. The cucumber genome provides a valuable resource for developing elite cultivars and for studying the evolution and function of the plant vascular system.
Yifan Qian,Xingwang Zhang,Lei Zhou,Shifang Ren,Jianxin Gu 한국당과학회 2012 한국당과학회 학술대회 Vol.2012 No.1
Human LOX-1/OLR 1 plays a key role in atherogenesis and endothelial dysfunction. The N-glycosylation of LOX-1 has been shown to affect its biological functions in vivo and modulate the pathogenesis of atherosclerosis. However, the N-glycosylation pattern of LOX-1 has not been described yet. The present study was aimed at elucidating the N-glycosylation of recombinanthuman LOX-1 with regard to N-glycan profile and N-glycosylation sites. Here, an approach using nonspecific protease (Pronase E) digestion followed by MALDI-QIT-TOF MS and multistage MS (MS3) analysis is explored to obtain site-specificN- glycosylation information of recombinanthuman LOX-1, in combination with glycan structure confirmation through characterizing released glycans using tandem MS. The results reveal that N-glycans structures as well as their corresponding attached site of LOX-1 can be identified simultaneously by direct MS analysis of glycopeptides from non-specific protease digestion. With this approach, one potential glycosylation site of recombinanthuman LOX-1 on Asn139 is readily identified and found to carry heterogeneous complex type N-glycans. In addition, manual annotation of multistage MS data utilizing diagnostic ions, which were found to be particularly useful in defining the structure of glycopeptides and glycans was addressed for proper spectra interpretation. The findings described herein will shed new light on further research of the structure-function relationships of LOX-1 N-glycan.
Hai-Zhen Wang,Xin Zhong,Gu-Ren Zhang,Xin Liu,Li Gu 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.2
Gynaephora qinghaiensis is a pest on the Qinghai-Tibet Plateau (QTP) that has led to substantial destruction of grassland vegetation. Its pupae are also natural hosts of parasitic wasp. Sexual dimorphism in immune responses is prevalent in vertebrates and invertebrates. However, sexual dimorphism in immune responses of insects, particularly G. qinghaiensis, is poorly understood at the transcriptional level. Here, we performed transcriptome sequencing in male and female pupae of G. qinghaiensis. A total of 118,357,040 clean reads were obtained and assembled into 114,944 unigenes. To explore the difference of immune responses in pupae of both sexes (male and female) of G. qinghaiensis. based on transcriptional level, we characterized the expression profiles of candidate transcripts in the two sexes of G. qinghaiensis. A total of 3,469 unigenes (1,888 up-regulated and 1,581 down-regulated genes) were differentially expressed in pupae of both sexes. Among the differentially expressed genes (DEGs), 263 unigenes related to immune responses were found in the two sexes in G. qinghaiensis; of these, 202 were up-regulated and 61 were down-regulated in the female pupae compared to male pupae. This indicates there were some differences in the expression of immune-related genes between male and female G. qinghaiensis pupae. Therefore, we speculated that the differences in immune responses also likely exsited in pupae of both sexes. Our report provides a valuable genomic resource for further studies of Gynaephora and improves our understanding of the molecular mechanisms underlying immunological differences between male and female insects.