Results 211 to 220 of about 18,755 (263)

Coenzyme A and Aldolase in Rubber-bearing Plants

Nature, 1958
THERE is evidence that the biosynthesis of rubber from carbon dioxide and water in Parthenium argentatum 1 may proceed through acetate and β-methylcrotonate, and that acetate can also act as a precursor of rubber in Hevea brasiliensis 2. Co-enzyme A probably plays a vital part in the process.
J. A. GASCOIGNE, W. G. OVEREND, G. F. J. MOIR, G. HÜBSCHER   +3 more
openaire   +2 more sources

Determination of Rubber in Rubber-Bearing Plants

Rubber Chemistry and Technology, 1933
Abstract THE determination of the true rubber content of both raw and manufactured rubber has been the subject of extensive investigation. Search has failed to reveal any corresponding record covering studies applicable to rubber-bearing plants.
D. Spence, M. L. Caldwell
openaire   +1 more source

Shape optimization of a rubber bearing

International Journal of Fatigue, 1991
Abstract Large deformations in a rubber bearing between two conical tubes may lead to squashing folds that can cause local rupture of the rubber followed by complete destruction of the bearing. A new method, CAO (computer-aided optimization), which is based on the simulation of biological growth, is used to avoid these squashing folds by reducing the
Mattheck, C., Erb, D.
openaire   +1 more source

An Investigation of Adaptive Rubber Bearings

Volume 8: Seismic Engineering, 2016
Proposed in this study are several innovative seismic isolators composed of rubber materials that are called adaptive rubber bearings based on their adaptive characteristics. The materials used in the proposed isolators are free of lead commonly found in lead rubber bearings.
C. S. Tsai, Hui-Chen Su, Wen-Chun Huang
openaire   +1 more source

Behaviour of lead-rubber bearings

Structural Engineering and Mechanics, 1998
Experimental work undertaken to investigate the behaviour of lead-rubber bearings under compression and a combination of compression and shear or rotation has been reported on elsewhere. However, it is difficult to determine the state of stress within the bearings in terms of the applied forces and the interaction between the lead plug and the steel ...
Atsushi Mori, P.J. Moss, A.J. Carr, N. Cooke   +3 more
openaire   +1 more source

Extraction and Characterization of Latex and Natural Rubber from Rubber-Bearing Plants

Journal of Agricultural and Food Chemistry, 2010
Consecutive extraction of latex and natural rubber from the roots of rubber-bearing plants such as Taraxacum kok-saghyz (TKS), Scorzonera tau-saghyz (STS), and Scorzonera Uzbekistanica (SU) were carried out. Latex extraction was carried via two methods: Blender method and Flow method. The results of latex extraction were compared.
Anvar U, Buranov, Burkhon J, Elmuradov
openaire   +2 more sources

Tetracyclosqualene and its bearing on the structure of cyclized rubber

Tetrahedron Letters, 1963
Abstract Recently we reported that cyclized rubber consists of six-membered rings fused into predominantly bicyclic structures which are connected by methylene groups and/or uncyclized isoprene units. Each of the fused ring structures is presumed to contain a single tetra-, tri- or di-substituted double bond, the relative amounts of which are ...
Morton A. Golub, Jorge Heller
openaire   +1 more source

Rubber supported hydrostatic thrust bearings with rigid bearing surfaces

Tribology International, 1997
Abstract The film pressure of tilted hydrostatic thrust bearings results in a tilt opposing moment. This self-aligning action of the tilt opposing moment can be used effectively to reduce the deflection of the film contour. For this reduction some adjustment (elasticity) of the bearing system is necessary.
A. van Beek, A. Segal
openaire   +1 more source

Anti-seismic rubber bearing

The Journal of the Acoustical Society of America, 1991
There is provided an anti-seismic rubber bearing made up of a laminate structure formed by bonding a plurality of rigid plates having stiffness properties and a plurality of flexible plates having viscoelastic properties each other alternately, and flanges each attached to the upper and lower surfaces of the laminate structure, characterized by that ...
openaire   +1 more source

Water-Lubricated Soft-Rubber Bearings

Journal of Fluids Engineering, 1932
Abstract Rubber bearings lubricated with water are found to have remarkably low coefficients of friction and to give excellent service under many conditions. The softness of the rubber makes these bearings stand up in the presence of sand and grit, and it also makes the laws of lubrication governing these bearings differ from the ...
W. F. Busse, W. H. Denton
openaire   +1 more source