Phonon Dispersion in 1,4-<i>cis</i>-Poly-(2-Methyl-1,3-Pentadiene)

Misra, Navnit K.; Kapoor, Deepti; Tandon, Poonam; Gupta, V. D.

doi:10.1081/mb-100100370

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…The CC stretch frequency is used for the structural diagnosis of dienes. It has a higher value for trans configuration (1673 cm −1 in trans ‐1,4‐polybutadiene27) as compared to cis configuration (1637 cm −1 in cis‐ poly 2‐methyl 1,3 pentadiene28). The higher value in case of trans configuration is because of the lesser steric hindrances between atoms at 1 and 4 position making the double bond stress free.…”

Section: Resultsmentioning

confidence: 99%

Immunologic characteristics of intrarenal T cells: Trafficking of expanded CD8+ T cell β‐chain clonotypes in progressive lupus nephritis

Winchester

Wiesendanger

Zhang

et al. 2012

Arthritis & Rheumatism

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Objective To better define the immunologic character of the T cell infiltrate in lupus nephritis. Methods We performed double immunohistochemical staining and clonotypic T cell receptor (TCR) beta-chain sequencing in multiple anatomic regions isolated by laser-capture microdissection from renal biopsies. Results SLE kidneys have a variably patterned and often extensive infiltrate of predominantly clonally expanded T cells of CD4 and CD8 lineages. CD4 T cells were prominent in nearly two-thirds of SLE biopsies, and distributed as broad periglomerular aggregates or intermixed with CD8 T cells forming periglomerular caps. Sequencing of the T cell TCR from periglomerular regions showed a predominance of clonally expanded T cells. The CD8 T cells, which were present in all biopsies, often adhered to Bowman's capsule and infiltrated the tubular epithelium. They exhibited features that suggest participation in an adaptive immune response: differentiation into CD28null memory-effector phenotype, trafficking of the same expanded clonotype to different regions of the kidney and to the peripheral blood, and clonal persistence for years in repeat biopsies. CD8 T cell tubulitis was especially associated with progressive changes. Conclusions The immunological characteristics of the infiltrating CD4 and CD8 T cells in the lupus kidney indicate they have the potential to mediate injury, which may be relevant to development of progressive renal failure. Whereas the oligoclonality of the CD4 T cell infiltrate is consistent with the paradigm of SLE as a class II-associated autoimmune disease, the finding of CD8 T cell clonality and trafficking implies participation in a distinct systemic adaptive immune response.

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Section: Resultsmentioning

confidence: 99%

Immunologic characteristics of intrarenal T cells: Trafficking of expanded CD8+ T cell β‐chain clonotypes in progressive lupus nephritis

Winchester

Wiesendanger

Zhang

et al. 2012

Arthritis & Rheumatism

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Vibrational dynamics and heat capacity of polychloroprene

Gupta

Agarwal

Choudhary

et al. 2011

J of Applied Polymer Sci

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Normal modes and their dispersion have been obtained for polychloroprene in the trans form using Wilson's G F matrix method as modified by Higg's for an infinite polymeric chain. Urey Bradley force field has been used. Several new assignments, which are missing in earlier work, are reported. The assignments of lower frequency modes have been confirmed using inelastic neutron scattering data. The characteristic features of dispersion curves have been explained. Variation of heat capacity as a function of temperature has been predicted.

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