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Gloves
Published in Robert N. Phalen, Howard I. Maibach, Protective Gloves for Occupational Use, 2023
Marie-Noëlle Crépy, Pierre Hoerner
More than 2,000 species of plants can produce natural rubber, but nowadays it is mainly produced from H. brasiliensis. Guayule (Parthenium argentatum) is a woody plant growing in the deserts of the US Southwest and Mexico that produces a cleaner natural rubber latex with fewer proteins and thus are less likely to trigger allergies. However, extracting latex from guayule involves cutting the plant, mixing the branches to release the latex entrapped in the cells in the plant, and then extracting/separating the latex from the other residues. This process is far more challenging, lengthy, and expansive than collecting the latex simply by harvesting the bark of the Hevea tree. Despite the complexity, there has been some massive research over the past 30 years on a way to find alternative sourcing to tropical latex.12
Core Eudicots: Dicotyledons V
Published in Donald H. Les, Aquatic Dicotyledons of North America, 2017
Despite its enormity of species, Asteraceae provide surprisingly few economically important plants, but several of these are quite significant. Foodstuffs include endive (Cichorium), globe artichoke (Cynara scolymus), lettuce (Lactuca sativa), and Jerusalem artichoke (Helianthus tuberosus). The North American sunflower (Helianthus annuus) is grown as a source of seed oil and as an ornamental. Flavoring and cooking oils are also obtained from safflower (Carthamus tinctorius). Guayule (Parthenium argentatum) is grown commercially as an alternative source of rubber, which is used in the manufacture of hypoallergenic latex. Coneflower (Echinacea) is a popular medicinal plant and also is grown as an ornamental. The mysterious absinthe spirits owe their distinctive flavor to the flowers and foliage of grand wormwood (Artemisia absinthium). Other horticulturally important genera include asters (Symphyotrichum), blazingstar (Liatris), black-eyed Susan (Rudbeckia), dahlias (Dahlia), daisy (Chrysanthemum), goldenrod (Solidago), marigolds (Calendula), tickseed (Coreopsis), and zinnias (Zinnia). The common dandelion (Taraxacum officinale) is a ubiquitous lawn weed, and ragweeds (Ambrosia spp.) are legendary for their allergenic pollen, which is a common cause of “hayfever.”
Polymers
Published in Bryan Ellis, Ray Smith, Polymers, 2008
General Information: Rubber from Guayule shrubs differs from rubber from Hevea trees mainly with respect to non-rubber components. Guayule rubber contains less non-rubber and is more linear and gel-free; gives better processing characteristics [1]. Contains 100% cis-1,4-polyisoprene, with resins, rubber sol. triglycerides and higher terpenes. Has little or no branching and contains no natural oxidant. Evidence for bimodality when grown in wet conditions [5], normally unimodal
Experimental evaluation of the potential of the sap of the petroleum plant as an asphalt binder rejuvenating agent
Published in Road Materials and Pavement Design, 2019
Lilian Medeiros Gondim, Sandra de Aguiar Soares, Suelly Helena de Araújo Barroso
Lusher and Richardson (2015) authored a study on the use of extracts of the Guayule plant as rejuvenating agents in mixtures containing high RAP content. The authors explain that the Guayule (whose scientific name is Parthenium Argentatum) is a woody shrub, native to the northern regions of Mexico and southwestern United States, which grows in arid and semi-arid climates, and is the source of a high-quality natural rubber.