• Title/Summary/Keyword: H.283

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Structure of $\alpha$,$\beta$-Diphenylsuccinic Acid ($\alpha$,$\beta$-Diphenylsuccinic Acid의 구조)

  • 서일환;윤민중
    • Korean Journal of Crystallography
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    • v.5 no.2
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    • pp.108-112
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    • 1994

  • C19H20O5, Mr=314.337, triclinic,PI, a=10.291(2)A, b=11.218(3)A, c=3.059(1)A, α=74.54(2)°, β=1148.84(1)°, r=109.84(2)°, V=883.283(2)A3, λ(Mo Kα)=0.71069A, μ=0.47 mm-1, F(000)=324, 296K, Z=2, Dx=1.18Mgm-3. Final R=0.0580 for 1637[F>3σ(F)]unique refledtions. α,β-diphenylsuccinic acid, C16H14O4, are connedted with the solvent actone by hydrogen bond O(4)-H˙˙˙O(5), forming a dimer related by related by centrosymmentry thorough intermolecualr carboxylic hydrogen bond O(1)-H˙˙˙O(2)(-x,-y,-z). The nearest distance 3.288A[O(2)˙˙˙O(2)(-x,-y,-z)] between the dimers shows that the packing of the dimer is govermed by van der Waals'force.

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Performance analysis of the Resource Reservation Schemes using Mobile Cluster based H-MRSVP in Wireless Mobile Networks (무선 이동망에서 이동 클러스터 기반의 H-MRVP를 이용한 자원관리 기법의 성능 분석)

  • Ma, Gyeong-Min;Won, Jeong-Jae;Lee, Hyeong-U;Jo, Chung-Ho
    • The KIPS Transactions:PartC
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    • v.9C no.2
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    • pp.283-292
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    • 2002

  • This paper develops a scheme of resource management for guaranteeing QoS of realtime traffic in wireless mobile internet environments Mobile terminal has significant impact on the QoS originating mobility provided to a real-time application. The currently proposed MRSVP is not clear the boundary of resource reservation tregion and also can give rise to signal overhead to maintain sessions. To solve above problem, we propose the new reservation protocol, mobile cluster based H-MRSVP to combine MRSVP with moving cluster concept. In this paper, we analytically design our model for guaranteeing the QoS of realtime traffic and compare the three schemes: guard channel allocation schemes, DCA and our model. The performance measures are the probabilities of new call blocking, handoff dropping, resource utilization and service completion versus the system offered Erlang load. Consequently, Simulation indicate our model is more flexible than DCA in a view pint of channel utilization and gains the advantage over guard channel scheme with respects to the mobility.

  • https://doi.org/10.3745/KIPSTC.2002.9C.2.283 인용 PDF KSCI

Effect of 42 amino acid long amyloid-β peptides on Arabidopsis plants

  • Lee, HanGyeol;Kim, Ji Woo;Jeong, Sangyun;An, Jungeun;Kim, Young-Cheon;Ryu, Hojin;Lee, Jeong Hwan
    • Journal of Plant Biotechnology
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    • v.47 no.4
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    • pp.283-288
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    • 2020

  • Although the evolution of Arabidopsis thaliana and humans diverged approximately 1.6 billion years ago, recent studies have demonstrated that protein function and cellular processes involved in disease response remain remarkably conserved. Particularly, γ-secretase, a multisubunit protein complex that participates in intramembrane proteolysis (RIP) regulation, is also known to mediate the cleavage of more than 80 substrates including the amyloid precursor protein (APP) and the Notch receptor. Although the genes (PS1/2, APH-1, PEN-2, and NCT) coding for the γ-secretase complex components are present in plant genomes, their function remains largely uncharacterized. Given that the deposition of 42 amino acid long amyloid-β peptides (hAβ42) is thought to be one of the main causes of Alzheimer's disease, we aimed to examine the physiological effects of hAβ42 peptides on plants. Interestingly, we found that Arabidopsis protoplast death increased after 24 h of exposure to 3 or 5 µM hAβ42 peptides. Furthermore, transgenic Arabidopsis plants overexpressing the hAβ42 gene exhibited changes in primary root length and silique phyllotaxy. Taken together, our results demonstrate that hAβ42 peptides, a metazoan protein, significantly affect Arabidopsis protoplast viability and plant morphology.

  • https://doi.org/10.5010/JPB.2020.47.4.283 인용 PDF KSCI