Results 31 to 40 of about 490,697 (155)

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 ...
M. C. Inácio, Weimao Zhong, Ya-Ming Xu, E. Wijeratne, Chandrashekhar Madasu, István Gábor Molnár, A. A. L. Gunatilaka   +6 more
semanticscholar   +3 more sources

A high-throughput quantification of resin and rubber contents in Parthenium argentatum using near-infrared (NIR) spectroscopy [PDF]

Plant Methods, 2019
Background Guayule (Parthenium argentatum A. Gray), a plant native to semi-arid regions of northern Mexico and southern Texas in the United States, is an alternative source for natural rubber (NR).
Zinan Luo, Kelly R. Thorp, Hussein Abdel-Haleem   +2 more
doaj   +2 more sources

Synergistic Potential of Argentatins A and B to Improve 5-Fluorouracil Cytotoxicity in Colorectal Cancer Cell Models. [PDF]

J Cell Mol Med
ABSTRACT Colorectal cancer is the third most commonly diagnosed cancer worldwide and the second most common cause of cancer‐related death in both men and women. Although a number of treatments are available to combat this malignancy, the antimetabolite 5‐fluorouracil has been the cornerstone of therapy since its synthesis in the 1950s.
Sánchez-Olivares P, Silva-Nolasco AM, de la Cruz-Morcillo MA, García-Martínez MM, Pinedo-Serrano A, Carmona M, Galán-Moya EM.   +6 more
europepmc   +2 more sources

Rubber biosynthesis drives the biogenesis and development of rubber particles, the rubber-producing organelles. [PDF]

Plant Biotechnol J
Summary Rubber particles (RPs) are specialized organelles for the biosynthesis and storage of natural rubber in rubber‐producing plants. However, the mechanisms underlying the biogenesis and development of RPs remain unclear. In this study, two latex‐specific cis‐prenyltransferases (CPTs), TkCPT1 and TkCPT2, were identified in Taraxacum kok‐saghyz ...
Xu T, Li Y, Liu X, Yang X, Huang Z, Xing J, Liang C, Li J, Tan Y, Zhang S, Qi J, Ye, Li Z, Cao J, Tang C, Liu K.   +15 more
europepmc   +2 more sources

A Higher Frequency Administration of the Nontoxic Cycloartane-Type Triterpene Argentatin A Improved Its Anti-Tumor Activity [PDF]

Molecules, 2020
Parthenium argentatum (Gray), commonly known as guayule, has been used to obtain natural rubber since the beginning of the 20th century. Additionally, the so called “resin” is a waste product derived from the industrial process.
Zaira Tavarez-Santamaría, Nadia J. Jacobo-Herrera, Leticia Rocha-Zavaleta, Alejandro Zentella-Dehesa, Beatriz del Carmen Couder-García, Mariano Martínez-Vázquez   +5 more
doaj   +2 more sources

Characterization of Guayule Resin as a Natural Wood Preservative: Carrier System and Leaching Rate Analysis

BioResources
The environmental and health concerns of traditional preservatives have led to investigations into an effective solution for protecting wood products with preservatives from natural sources.
Abigael Laisa, Laya Khademibami, Carrlet Elizabeth Stokes, Seyed Abolghasem Fatemi, Rubin Shmulsky   +4 more
doaj   +2 more sources

Improved Durability of Wood Strand-Based Panels Using Guayule

Applied Sciences
In this study, the most effective application method of guayule resin and its effects on termite and fungal decay biological performances of wood strand-based (WSB) panels were explored. Southern yellow pine (Pinus spp.
Edward D. Entsminger, Mostafa Mohammadabadi, C. Elizabeth Stokes, Suman Pradhan   +3 more
doaj   +2 more sources

Semi-synthesis and cytotoxicity evaluation of pyrimidine, thiazole, and indole analogues of argentatins A–C from guayule (Parthenium argentatum) resin

Medicinal Chemistry Research, 2021
Argentatins A–C (1–3), the major cycloartane-type triterpenoids of guayule resin, a byproduct of commercial rubber production, were converted into their pyrimidine (7–12), thiazole (13–15), and indole (16–18) analogues by a molecular hybridization ...
Chandrashekhar Madasu, Ya-Ming Xu, E. Wijeratne, Manping X. Liu, I. Molnár, A. A. L. Gunatilaka   +5 more
semanticscholar   +2 more sources

Rheological and Component Characterization of an Innovative Bio-Binder Using Guayule Resin in Partial and Entire Asphalt Replacement

, 2020
Asphalt cement will not last for a long time as the world encounters a diminishment in the crude oil. For sustainable, flexible pavement development, new resources can provide a contribution to replace it partially or entirely. In this study, asphalt was
A. Hemida, M. Abdelrahman
semanticscholar   +3 more sources

Research progress on sustainability of key tire materials

SusMat, Volume 3, Issue 5, Page 581-608, October 2023., 2023
Graphical Abstract: In response to global concerns about petroleum resource depletion and environmental issues, the tire industry is increasingly focusing on sustainable materials. This review summarizes the current state of research on sustainable alternatives, including natural/bio‐based rubber, green cord fabrics, and eco‐friendly additives, aimed ...
Sai Deng, Ruixin Chen, Shiyu Duan, Qingxiu Jia, Xinmin Hao, Liqun Zhang   +5 more
wiley   +1 more source