Vitamin E prevents oxidative modification of brain and lymphocyte band 3 proteins during aging.

Antioxidants may play an important role in preventing free radical damage associated with aging by interfering directly in the generation of radicals or by scavenging them. We investigated the effects of a high vitamin E and/or a high beta-carotene diet on aging of the anion transporter, band 3, in lymphocytes and brain. The band 3 proteins function as anion transporters, acid base regulators, C02 transporters, and structural proteins that provide a framework for membrane lipids and that link the plasma membrane to the cytoskeleton. Senescent cell antigen (SCA), which terminates the life of cells, is a degradation product of band 3. This study was conducted as a double-blind study in which eight groups of middle-aged or old mice received either high levels of beta-carotene and/or vitamin E or standard levels of these supplements in their diets. Anion transport kinetic assays were performed on isolated splenic lymphocytes. Immunoreactivity of an antibody that recognizes aging changes in old band 3 preceding generation of SCA was used to quantitate aged band 3 in brain tissue. Results indicate that vitamin E prevented the observed age-related decline in anion transport by lymphocytes and the generation of aged band 3 leading to SCA formation. beta-Carotene had no significant effect on the results of either assay. Since increased aged band 3 and decreased anion transport are initial steps in band 3 aging, which culminates in the generation of SCA and cellular removal, vitamin E prevents or delays aging of band 3-related proteins in lymphocytes and brain.

Structural Characterization of Micro- and Mesoporous Carbon Materials Using In Situ High Pressure 129Xe NMR Spectroscopy

In situ high pressure 129Xe NMR spectroscopy in combination with volumetric adsorption measurements were used for the textural characterization of different carbon materials with well-defined porosity including microporous carbide-derived carbons, ordered mesoporous carbide-derived carbon, and ordered mesoporous CMK-3. Adsorption/desorption isotherms were measured also by NMR up to relative pressures close to p/p0 = 1 at 237 K. The 129Xe NMR chemical shift of xenon adsorbed in porous carbons is found to be correlated with the pore size in analogy to other materials such as zeolites. In addition, these measurements were performed loading the samples with n-nonane. Nonane molecules preferentially block the micropores. However, 129Xe NMR spectroscopy proves that the nonane also influences the mesopores, thus providing information about the pore system in hierarchically structured materials.

Impact characteristics of glass fiber-reinforced composite materials for use in roadside safety barriers. Final report.

Federal Highway Administration, McLean Va.

Partially plastic thick-walled cylinders. A portion of a research project entitled plastic behavior of engineering materials.

Bibliography: leaves 35-35.

Sixth congress of the International Association for Testing Materials, held in New York, September 3-7, 1912.

Mode of access: Internet.

Thermal properties of refractory materials.

"Project no. 4776, Task ARPA order 24-60."

Investigation of feasibility of utilizing available heat resistant materials for hypersonic leading edge applications.

"Volumes I through VIII are unclassified while volume IX is classified secret."

Automotive applications of composite materials. Final report.

Corporate-Tech Planning, Inc., Waltham, Mass.

The thermal properties of thirteen solid materials to 5000⁰F for their destruction temperatures.

"Project no. 7360, Task no. 73603."

Preliminary reports, memoranda and technical notes of the Materials Research Council Summer Conference

Mode of access: Internet.

Materials of engineering.

pt. I. Non-metallic materials of engineering: stone, timber, fuel, lubricants, etc. 5th rev. ed. 1899.--pt. II. Iron and steel. 9th rev. ed. 1903.--pt. III. Brasses, bronzes, and other alloys, and their constituent metals. 4th ed. rev. 1900.

Materials of engineering.

pt. 1. A treatise on non-metallic materials of engineering: Stone, timber, fuel, lubricants, etc. Fifth rev. ed.--pt. 2. A treatise on iron and steel. Ninth rev. ed.--pt. 3. A treatise on brasses, bronzes, and other alloys, and their constituent metals. Fourth ed. rev.

Report of the tests of metals and other materials for industrial purposes; made with the United States testing machine at Watertown arsenal, Massachusetts.

Mode of access: Internet.

Johnson's Materials of construction,

Mode of access: Internet.

Properties of engineering materials /

Includes index.