Results 111 to 120 of about 207,651 (149)

Microbial transformation of some triterpenoids of Guayule resin by Chaetomium sp.

Phytochemistry Letters, 2023
Microbial biotransformation of argentatin A (1), isoargentatin A (2) and argentatin C (3), the triterpenoid constituents of guayule (Parthenium argentatum) resin was conducted with Chaetomium sp. PA001, an endophytic fungus of the same plant. The experiments yielded six new products (4–9) formed by: (i) nucleophilic oxygenation of the 3-ketone moiety ...
Marielle C. Inacio, Weimao Zhong, Ya-Ming Xu, E.M. Kithsiri Wijeratne, Chandrashekhar Madasu, István Molnár, A.A. Leslie Gunatilaka   +6 more
openaire   +2 more sources

Effect of resin components on the degradation of guayule rubber

Journal of Applied Polymer Science, 1985
AbstractAll natural rubbers are likely to contain some long chain fatty acids or their esters. The individual effect of the four C18 fatty acids (stearic, oleic, linoleic, and linolenic acid) present in the guayule resin on the degradation of guayule rubber has been investigated concurrently by stress–relaxation of radiation cured rubber networks and ...
A. K. Bhowmick, S. Rampalli, D. McIntyre
openaire   +1 more source

Biomass, rubber, and resin yield potentials of new guayule germplasm

Bioresource Technology, 1991
Abstract Substantial improvement in rubber yield must be made in order to establish guayule as a reliable source of natural rubber. Selection among heterogeneous apomictic polyploids was used to improve rubber yield in a relatively short period of time.
Ali Estilai
exaly   +2 more sources

Rubber and resin contents of native guayule germplasm of Mexico

Industrial Crops and Products, 1997
Abstract Plant germplasm obtained from the origin of the genetic material can be useful for varietal improvement. For guayule (Parthenium argentatum Gray.) germplasm, 343 accessions were collected from 53 locations in 20 municipalities within five provinces (Coahuila, Durango, Nuevo Leon, San Luis Potosi and Zacatecas) in Mexico.
S. Kuruvadi, A.Lopez Benitez, D.Jasso de Rodríguez   +2 more
openaire   +1 more source

New application of guayule resin in controlled release formulations

Industrial Crops and Products, 2013
Abstract Guayule resin is a by-product of the rubber extraction process from Parthenium argentatum Gray shrubs. When guayule is cultivated to a large extent, it is possible to achieve a production of 200–2000 kg/ha of resin in addition to the commercial natural rubber production that is sought for use as hypoallergenic latex.
M.J. Pascual-Villalobos, M.D. López
openaire   +1 more source

Rubber and Resin Yield Performance of New Guayule Selections

Agronomy Journal, 1992
AbstractGuayule (Parthenium argentatum Gray) is a promising alternative to the rubber tree (Hevea brasiliensis Muell. Arg.) for domestic production of natural rubber in semiarid regions. Guayule is not yet a crop and its commercialization will depend on the development of high rubber‐yielding cultivars. The objectives of this study were to determine if
A. Estilai, B. Ehdaie, H. H. Naqvi, D. A. Dierig, D. T. Ray, A. E. Thompson   +5 more
openaire   +1 more source

Effect of Resin Components on the Reversion Process of Sulfur-Vulcanized Guayule Rubber

Rubber Chemistry and Technology, 1986
Abstract An effort to characterize the reversion process of guayule rubber when naturally-occurring guayule resin components are present has shown that these components act as a reversion-retarding material. The amount of reversion resistance varies as a function of temperature, concentration, and type of fatty acid.
James M. Sloan, Michael J. Maghochetti, Walter X. Zukas   +2 more
openaire   +1 more source

The degradation of guayule rubber and the effect of resin components on degradation at high temperature

Journal of Applied Polymer Science, 1987
Degradation of pure guayule rubber and rubber in the presence of stearic, oleic, linoleic, and linolenic acid, has been studied at high temperatures (from 150°C to 600°C) using thermogravimetric analysis (TGA). On-line mass spectrometric analysis of the products of decomposition has also been done to understand the mechanism of degradation ...
A. K. Bhowmick, S. Rampalli, K. Gallagher, R. Seeger, D. McIntyre   +4 more
openaire   +1 more source

Heritability of height, width, resin, rubber, and latex in guayule (Parthenium argentatum)

Industrial Crops and Products, 2001
Abstract Plant breeding in guayule, a rubber and latex producing plant, has not been as effective as predicted or desired. A surprisingly large amount of variability has been reported in this apomictic crop for traits such as plant height, width, resin, rubber, and latex contents.
D.A. Dierig, D.T. Ray, T.A. Coffelt, F.S. Nakayama, G.S. Leake, G. Lorenz   +5 more
openaire   +1 more source

Termite Resistance of Guayule Resin TreatedSouthern Pine and Yellow Poplar

Wood is susceptible to termite degradation, necessitating the development of effective and sustainable preservative systems. This study evaluates the termite resistance of wood treated with guayule resin as a bio-based preservative against Coptotermes formosanus, with emphasis on the effects of resin concentration, species, and carrier system.
Abigael Laisa, Laya Khademibami
openaire   +1 more source