5,486 research outputs found
Unlinkability between Customer Profile and ID for Preserving Privacy in Digital Content Transactions
No full textImmunohistochemical localization of interferon-gamma in normal human ovary
No full textThere is increasing evidence that cytokines are important intraovarian non-steroidal regulators. The aim of the present study was to evaluate the presence in the human ovary of interferon (IFN)-gamma, a cytokine produced by T lymphocytes after mitogenic or antigenic stimulation. Very low levels of IFN-gamma (0.025-0.057 IU/ml) were found in follicular fluid of large spontaneously maturing follicles, in the ovarian vein (< 0.01-0.079 IU/ml) or peripheral blood (< 0.01-0.06 IU/ml). The avidin-biotin immunocytochemical technique, with appropriate monoclonal antibodies, was used to localize IFN-gamma-positive cells, human leukocyte antigen (HLA)-DR molecules, activated T cells, T helper/inducer cells and T cytotoxic/suppressor cells. IFN-gamma-positive cells were only detected in preovulatory follicles, associated with the follicular basal lamina, thecal vessels and interstitial tissue. In the same large follicles very few T helper/inducer cells were detected, but a high proportion of T lymphocytes expressed the CD8 phenotype in the theca, interstitial tissue and follicular cavity. No IFN-gamma-positive cells were observed in preantral and small antral follicles. The results indicate that the human ovary contains immunoreactive IFN-gamma, suggesting that the cytokine plays a paracrine role in human ovarian function
On the conformation of the inversion transition states in the thermal E,Z isomerization of aromatic azomethines
No full textSTO-3G calculations with full geometry optimization on substituted formaldehyde- pyrazolone- and hexafluoroacetone-anils indicate different conformations of the linear inversion state in the thermal isomerization of aromatic azomethines dependent on the extent of push-pull conjugation in the molecular systems; based on this fact an explanation of Hammett plot deviations from linearity found for special azomethines becomes possible without the assumption of a competition between the inversion and rotation mechanism in the isomerization
Mechanism of thermal Z/E isomerization of aromatic azo compounds. Relation between rotation and inversion states
No full textAb initio calculations in a variation-perturbation scheme have been carried out on azobenzene and several substituted derivatives to clarify some mechanistic aspects of thermal Z/E isomerisation
Improved ID-based Authenticated Group Key Agreement Secure Against Impersonation Attack by Insider
No full textCrystallinity of polymers by x-ray diffraction: a new fitting approach
No full textA new method for determining the crystallinity fraction of semi-crystalline polymers from X-ray powder diffraction measurements is presented. Using the scattering of an amorphous sample of the same material and a convenient expression for the disorder factor, the method can lead to precise separation of the crystalline and amorphous contributions by a fitting procedure. In this way, the crystallinity fraction and the disorder factor are automatically obtained. The method is applied to polyethylene terephthalate. © 1991
Cyanide-Free and Broadly Applicable Enantioselective Synthetic Platform for Chiral Nitriles through a Biocatalytic Approach
No full textBetke T, Rommelmann P, Oike K, Asano Y, Gröger H. Cyanide-Free and Broadly Applicable Enantioselective Synthetic Platform for Chiral Nitriles through a Biocatalytic Approach. Angewandte Chemie (International ed. in English). 2017;46(40):12361-12366
- …
