Space programs summary no. 37-61, volume 3 for the period 1 December 1969 - 31 January 1970. Supporting research and advanced development

Planetary atmospheres, space communications, and spacecraft power, control, antennas, materials, and propulsion system

Index to 1986 NASA Tech Briefs, volume 11, numbers 1-4

Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage commercial application. This index for 1986 Tech Briefs contains abstracts and four indexes: subject, personal author, originating center, and Tech Brief Number. The following areas are covered: electronic components and circuits, electronic systems, physical sciences, materials, life sciences, mechanics, machinery, fabrication technology, and mathematics and information sciences

Federal Register

Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii

Synthesis, characterization and assessment of new nanohybrid materials for topical applications

Abstract: The chemical stability, degradation and penetration ability of pharmaceutically active drugs in topical applications are the greatest challenges in cosmetics because of problems with the protection of actives for long times and with delivery. Therefore, the development of unique and efficient material is required for protection and for controlled drug release systems. Layered double hydroxides (LDHs), also known as hydrotalcite-like compounds, are 3D crystals formed by 2D laminates which are orderly arranged in longitudinal directions. The host LDHS layers possess positive charges due to isomorphic substitutions, which are counterbalanced by hydrated exchangeable anions located in the interlayer region. Some of the active drug molecules can be intercalated into the inner region of the LDHs host through ionic bonding, hydrogen bonding, or Van Der Waals’ interaction to form nanohybrids, which are more potent for protection and controlled-release systems. For example, aspirin, also known as acetylsalicylic acid (ASA), is a class of NSAID and is a traditional analgesic available on the market. ASA is an organic compound having easily polarizable carboxylic groups, it is therefore easily intercalated into the LDH host, to yield an LDH-ASA nanohybrid. Generally, ASA is used as a pain relief ingredient in topical skin care products. ASA is usually an unstable molecule, and easy to degrade into small fragments (salicylic acid and acetic acid) which give unwanted side effects; thus, to improve the chemical stability of ASA, the degradation behaviour of ASA is of great importance in cosmetic formulations. In this concern, LDHs nanoparticles have attracted specific attention because of their many desirable properties- particularly the protecting capacity after intercalation of drugs into LDH interlayers...Ph.D. (Chemistry

Cumulative index to NASA Tech Briefs, 1986-1990, volumes 10-14

Tech Briefs are short announcements of new technology derived from the R&D activities of the National Aeronautics and Space Administration. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage commercial application. This cumulative index of Tech Briefs contains abstracts and four indexes (subject, personal author, originating center, and Tech Brief number) and covers the period 1986 to 1990. The abstract section is organized by the following subject categories: electronic components and circuits, electronic systems, physical sciences, materials, computer programs, life sciences, mechanics, machinery, fabrication technology, and mathematics and information sciences

Federal Register

Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii

Energy: A continuing bibliography with indexes, issue 15

This bibliography lists 1112 reports, articles, and other documents introduced into the NASA scientific and technical information system from July 1, 1977 through September 30, 1977

Proceedings of the Second International Colloquium on Drops and Bubbles

Applications of bubble and drop technologies are discussed and include: low gravity manufacturing, containerless melts, microballoon fabrication, ink printers, laser fusion targets, generation of organic glass and metal shells, and space processing. The fluid dynamics of bubbles and drops were examined. Thermomigration, capillary flow, and interfacial tension are discussed. Techniques for drop control are presented and include drop size control and drop shape control