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Seasonal enhancement of IL-4 induced IgE synthesis by peripheral blood mononuclear cells of atopic patients (1993)

GAGNON, R. ; LIAN, JING ; BOUTIN, Y. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Clinical & experimental allergy 23 (1993), S. 0

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ISSN: 1365-2222

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Medicine

Notes: The role of IL-4 on IgE synthesis has been well established. IL-4 has been shown to promote IgE production by B cells from atopic and non-atopic donors. In this study, the effects of natural exposure to pollens on IL-4-indueed IgE synthesis by peripheral blood mononuclear cells of atopic and non-atopic donors were examined. The results confirm production of IgE in an IL-4 dose-dependent manner by PBMC cultures of these two groups. When cultures were performed out of the pollen season, following stimulation by IL-4, no significant difference was observed between the levels of IgE produced by PBMC of atopic and non-atopic donors. In contrast, upon natural exposure to pollens, significant higher levels of IgE were measured in the atopic group than in the non-atopic one. These results show that the policn season infiuences the IL-4-induced IgE synthesis by PBMC of allergic patients and are in keeping with seasonal rise of specific IgE antibodies.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2222.1993.tb03237.x

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One-dimensional regular arrays of antiphase domain boundaries in anti-ferroelectric tin-substituted lead zirconate titanate (PZT) Ceramics (1985)

Chang, Yu-Jin ; Lian, Jing-Yu ; Wang, Yong-ling

Springer

Applied physics 36 (1985), S. 221-227

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ISSN: 1432-0630

Keywords: 61.10 ; 61.70 ; 64 ; 77 ; 81.30

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics

Notes: Abstract The existence of one-dimensional regular arrays of antiphase domain boundaries has been confirmed in tin-substituted PZT ferroelectrics of ABO3 perovskite structure (Pb0.99{[(Zr1−y Sn y )1−x Ti x ]0.98Nb0.02}O3,x=0.03 and 0.04,y=0.20) by means of electron diffraction and lattice imaging. Calculation has been made of the number of satellite spots in the diffraction patterns and their positions determined. They coincide well with the electron diffraction patterns experimentally obtained. The finding proves the relative elongation in one dimension of the ferroelectric unit cell caused by a parallel array of electrical dipoles, as compared to the cell of an anti-parallel array of dipoles.