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RISS 인기검색어
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- 저자 : Shen Jinshan (검색결과 5 건)
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FINITE NON-NILPOTENT GENERALIZATIONS OF HAMILTONIAN GROUPS
Shen, Zhencai,Shi, Wujie,Zhang, Jinshan Korean Mathematical Society 2011 대한수학회보 Vol.48 No.6
In J. Korean Math. Soc, Zhang, Xu and other authors investigated the following problem: what is the structure of finite groups which have many normal subgroups? In this paper, we shall study this question in a more general way. For a finite group G, we define the subgroup $\mathcal{A}(G)$ to be intersection of the normalizers of all non-cyclic subgroups of G. Set $\mathcal{A}_0=1$. Define $\mathcal{A}_{i+1}(G)/\mathcal{A}_i(G)=\mathcal{A}(G/\mathcal{A}_i(G))$ for $i{\geq}1$. By $\mathcal{A}_{\infty}(G)$ denote the terminal term of the ascending series. It is proved that if $G=\mathcal{A}_{\infty}(G)$, then the derived subgroup G' is nilpotent. Furthermore, if all elements of prime order or order 4 of G are in $\mathcal{A}(G)$, then G' is also nilpotent.
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Finite non-nilpotent generalizations of Hamiltonian groups
Zhencai Shen,Wujie Shi,Jinshan Zhang 대한수학회 2011 대한수학회보 Vol.48 No.6
In J. Korean Math. Soc, Zhang, Xu and other authors investigated the following problem: what is the structure of finite groups which have many normal subgroups? In this paper, we shall study this question in a more general way. For a finite group G, we define the subgroup A(G) to be intersection of the normalizers of all non-cyclic subgroups of G. Set A_0=1. Define A_(i+1)(G)/A_i(G)=A(G/A_i(G)) for i≥1. By A_∞(G) denote the terminal term of the ascending series. It is proved that if G=A_∞(G), then the derived subgroup G' is nilpotent. Furthermore, if all elements of prime order or order 4 of G are in A(G), then G' is also nilpotent.
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Low METTL3 level in midgut of the Bombyx mori inhibit the proliferation of nucleopolyhedrovirus
Xue Peng,Jiangtao Zhai,Zhu Juan,Wang Meixian,Zhao Qiaoling,Huang Jinshan,Tang Shunming,Shen Xingjia 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
N6-methyladeosine (m 6 A) plays an important role in virus infection and replication. Bombyx mori nuclear polyhedrosis is caused by Bombyx mori nucleopolyhedrovirus (BmNPV) infection. Expression levels of m 6 Amodification-related genes after the infection of BmNPV were detected at first. Then, expression levels of BmNPV nucleocapsid protein gene VP39 and envelope fusion protein gene GP64 after knockdown of METTL3in vitro were quantified to identify the effect of m 6 A modification on BmNPV. BmNPV firstly infects the larval midgut in case of oral infection. Subsequently, to clarify the relationship between m 6 A modification and resistance of the silkworm to BmNPV, we detected the expression levels of m 6 A-modification-related genes invivo before and after infection of BmNPV. The results indicated that low METTL3 level hindered the proliferation of BmNPV to some extent, and silkworm strain with low METTL3 level showed stronger resistance against BmNPV. This study will accumulate new experimental data for elucidating the resistance mechanism of silkworm against BmNPV.
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Ma Weihua,Long Denglong,Wang Yi,Li Xinyu,Huang Jiaxing,Shen Jinshan,Su Wenting,Jiang Yusuo,Li Jie 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
Honeybee pollination behavior is influenced by flower volatiles, which honeybees sense via olfactory receptors. Honeybees are only weakly attracted to pear flowers. To investigate the potential reasons, we extracted and determined the floral volatile compounds from three pear cultivars (Su, Ya, and Xuehua) using headspace solidphase micro-extraction (HS-SPME) and gas chromatography-mass spectrometry (GC–MS). The effects of pear flower volatiles on the Asian honeybee (Apis cerana cerana Fabricius) and the European honeybee (Apis mellifera ligustica Spinola) were determined by electroantennogram (EAG) assays and behavioral tests in a three-arm olfactometer. Among the 76 flower volatiles detected with GC–MS, 21 were found in all three pear cultivars, accounting for approximately 70% of the total volatile content. 3-Methyl-1-butanol and (+)-limonene volatiles had the highest relative content. Five compounds elicited strong EAG responses in both bee species: 2-methylbu tyraldehyde, 1-nonanal, 6-methyl-5-hepten-2-one, 3-methyl-1-butanol, and (+)-limonene. Neither bee species showed positive taxis to these volatiles. In behavioral tests, A. mellifera ligustica showed a low preference for 6-methyl-5-hepten-2-one (20%, 400 µg/µL) and 2-phenethyl alcohol (16.7%, 400 µg/µL). Apis cerana cerana showed a low preference for 6-methyl-5-hepten-2-one (6.7%, 400 µg/µL) and 1-nonanal (10%, 400 µg/µL), whereas its preferences for 3-methyl-1-butanol (43.3%, 400 µg/µL) and α-farnesene (40%, 400 µg/µL) were similar to that for the control. Therefore, a lack of attractive volatile compounds could explain why honeybees are only weakly attracted to pear flowers. Therefore, to achieve acceptable pollination in pear orchards, we suggest using flower-scent sugar syrup feeding and a saturation pollination strategy.
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Characterization and profiling of MicroRNAs in posterior silk gland of the silkworm (Bombyx mori)
Fei Song,Xin Wang,Chen Chen,Yangyang Fan,Shunming Tang,Jinshan Huang,Xijie Guo,Xingjia Shen 한국유전학회 2015 Genes & Genomics Vol.37 No.8
MicroRNAs (miRNAs) regulate expression of genes at post-transcriptional level by binding on complementary sequences of target mRNAs and play multiple roles in biological processes. To investigate the differential expression of miRNAs in posterior silk gland (PSG) of silkworm (Bombyx mori) in different periods and regulation of miRNAs on the expression of fibroin genes, Solexa sequencing technology was used to detect miRNAs in PSGs of fourth-instar day-2 larvae and fifth-instar day-3 larvae, respectively. As a result, 466 previously reported miRNAs, and 35 novel miRNAs were detected, and 499 of these detected miRNAs are predicted to target 13,383 genes by target prediction softwares. Additionally, 29 miRNAs expressed differently between the PSG of fourthinstar day-2 larvae and fifth-instar day-3 larvae were found, and the differential expression of these miRNAs may play an important role in the expression of fibroin genes.
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