Search

Your search keyword '"Bona C"' showing total 1,150 results
Start Over Author "Bona C"
1,150 results on '"Bona C"'

203. Stuffed black holes

Author

Arbona, A., primary, Bona, C., additional, Carot, J., additional, Mas, L., additional, Massó, J., additional, and Stela, J., additional

Published
1998
Full Text
View/download PDF

234. Shock capturing methods in 1D numerical relativity.

Author

Araki, H., Brézin, E., Ehlers, J., Frisch, U., Hepp, K., Jaffe, R. L., Kippenhahn, R., Weidenmüller, H. A., Wess, J., Zittartz, J., Beiglböck, W., Chinea, F. J., González-Romero, L. M., Bona, C., Ibáñez, J.M., Martí, J.M., and Massó, J.

Abstract

A numerical code is presented which uses modern shock capturing methods to evolve spherically symmetric perfect fluid space-times. Harmonic slicing is used to ensure singularity avoidance, which is crucial in strong field situations. Some tests are presented, including an application to the stellar collapse problem. [ABSTRACT FROM AUTHOR]

Published
1993
Full Text
View/download PDF

245. Short Communication:Pasteurization of Milk Abolishes Bovine Herpesvirus 4 Infectivity.

Author

Bona, C., Dewals, B., Wiggers, L., Coudijzer, K., Vanderplasschen, A., and Gillet, L.

Subjects
*HERPESVIRUSES, *CATTLE diseases, *TUMOR necrosis factors, *APOPTOSIS, *PASTEURIZATION of milk
Abstract

Bovine herpesvirus 4 (BoHV-4) is a gammaherpesvirus highly prevalent in the cattle population that has been isolated from the milk and the serum of healthy infected cows. Several studies reported the sensitivity and the permissiveness of some human cells to BoHV-4 infection. Moreover, our recent study demonstrated that some human cells sensitive but not permissive to BoHV-4 support a persistent infection protecting them from tumor necrosis factor-α-induced apoptosis. Together, these observations suggested that BoHV-4 could represent a danger for public health. To evaluate the risk of human infection by BoHV-4 through milk or serum derivatives, we investigated the resistance of BoHV-4 to the mildest thermal treatments usually applied to these products. The results demonstrated that milk pasteurization and thermal decomplementation of serum abolish BoHV-4 infectivity by inactivation of its property to enter permissive cells. Consequently, our results demonstrate that these treatments drastically reduce the risk of human infection by BoHV-4 through treated milk or serum derivatives. [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

248. Effect of Maternal Antibodies on Influenze Virus-Specific Immune Response by Inactivated Virus and Naked DNA.

Author

Radu, D.L., Antohi, S., Bot, A., Miller, A., Mirarchi, A., and Bona, C.

Subjects
MATERNAL-fetal exchange, INFLUENZA viruses, IMMUNOLOGY, IMMUNOGLOBULINS
Abstract

While vaccines are effective in adults, they are less successful in newborns and infants. Neonatal unresponsiveness to vaccines could be owing to immaturity of lymphocytes and/or to inhibition by maternal antibodies. Unresponsiveness of newborn to vaccines can be overcame by genetic immunization. In the present study we investigated the effect of maternal antibodies on the anti-influenza virus protective response in progeny born to dams immunized with plasmid containing the hemagglutinin gene or UV-inactivated virus. The effect of maternal antibodies was studied in plasmid immunized F1 mice born to BALB/c dams, previously immunized with virus or plasmid and crossed with C57BL/6 males, as well as in offspring born to BALB/c dams immunized with plasmid and then immunized with UV-inactivated WSN virus. We have found that the inhibition period of the anti-HA antibody response in offspring born to dams immunized with DNA is shorter than that of offspring born to dams immunized with virus. Furthermore, there is a persistent inhibitory effect on B cells from offspring born to dams immunized with virus or injected with antiviral monoclonal antibodies (MoAb), after the decline of maternal antibody titers. The analysis of the haemagglutinin-specific clonotype reactivity pattern of offspring born to dams immunized with inactivated influenza virus or with a plasmid showed that clonotypes producing antibodies specific for the immunizing virus strain were predominant in offspring born to dams immunized with DNA compared to those born to dams immunized with virus. Maternal antibodies do not affect cell-mediated immunity. These findings might be used to design efficient vaccination schedules for newborns and infants. [ABSTRACT FROM AUTHOR]

Published
2001
Full Text
View/download PDF

249. Cell suppression in PPD-induced blast specific response of human peripheral blood lymphocytes.

Author

Bona, C., Audibert, Françoise, Juy, Dominique, and Chedid, L.

Subjects
*IMMUNOSUPPRESSION, *SUPPRESSOR cells, *LYMPHOCYTES, *MACROPHAGES, *IMMUNOGLOBULIN G, *BCG vaccines, *ANTINEOPLASTIC antibiotics, *NONSTEROIDAL anti-inflammatory agents
Abstract

Specific stimulation of T-cells by PPD was inhibited by their autologous B cells. This inhibition was obtained with B cells separated either by depletion of E-RFC or by elution, with human IgG of lymphocytes bound to Sephadex beads coated with rabbit antibodies anti-human Fab fragments. The suppression was proportional to the number of B cells added to 106 T cells incubated with PPD and as previously reported was more marked in the case of B or T cells from BCG- vaccinated subjects with negative skin tests. The suppressive phenomenon required viable B cells and was inhibited by cycloheximide but was not altered by pretreatment of suppressor cells with actinomycin D or colchicine. It seems that B-suppressor cells interfere with recognition of PPD by T cells rather than with the proliferative phase of the specific blast response. Using various surface markers (i.e. Ig, C3 and Fc receptors) it was shown that the suppressor cells represent a subset of Ig-bearing B cells which do not carry Fc receptors. [ABSTRACT FROM AUTHOR]

Published
1976

250. Nocardia water-soluble mitogen and lipoplysaccharide.

Author

Lowy, Ilana, Bona, C., Ciorbaru, Rita, and Chedid, L.

Subjects
*NOCARDIA, *MITOGENS, *POLYSACCHARIDES, *IMMUNOLOGICAL adjuvants
Abstract

Compares the activity of Nocardia water-soluble mitogen (NWSM) and lipopolysaccharide. Adjuvant activity in saline culture; Inability of NWSM to induce leucocyte proliferation.

Published
1977

Catalog

Books, media, physical & digital resources
See catalog results