Hevea brasiliensis
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Chain Dynamics and Strain-Induced Crystallization of Pre- and Postvulcanized Natural Rubber Latex Using Proton Multiple Quantum NMR and Uniaxial Deformation by in Situ Synchrotron X-ray Diffraction...

Chain Dynamics and Strain-Induced Crystallization of Pre- and Postvulcanized Natural Rubber Latex Using Proton Multiple Quantum NMR and Uniaxial Deformation by in Situ Synchrotron X-ray Diffraction... | Hevea brasiliensis | Scoop.it

The structural development and morphology in unvulcanized and vulcanized (both pre- and postvulcanized) natural rubber latex were studied in a relaxed state and under deformation by multiple-quantum (MQ) NMR and in situ wide-angle X-ray diffraction (WAXD), respectively. Vulcanization was carried out using both sulfur and peroxide, showing important differences on the spatial distribution of cross-links according to the source of vulcanizing agents. Sulfur prevulcanization promotes the formation of highly homogeneous networks in the dispersed rubber particles, whereas peroxide vulcanization makes broader spatial cross-link distributions. The latter is compatible with the formation of core–shell network structures. Molecular orientation and strain-induced crystallization were analyzed by both stress–strain relations and WAXD. An increase in the vulcanizing agent concentration led to an increase in modulus and crystalline fractions. For sulfur vulcanization, the additional heat treatment (postvulcanization) increased the interactions between rubber particles and unreacted vulcanizing agents. For peroxide vulcanization, the additional heat treatment led to chain scission reactions and degradation of network points.

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Anatomical and functional evaluation of tympanoplasty using a transitory natural latex biomembrane implant from the rubber tree Hevea brasiliensis

Anatomical and functional evaluation of tympanoplasty using a transitory natural latex biomembrane implant from the rubber tree Hevea brasiliensis | Hevea brasiliensis | Scoop.it

PURPOSE: To compare the role of transitory latex and sylastic® implants in tympanoplasty on the closure of tympanic perforations.
METHODS: A randomized double-blind prospective study was conducted on 107 patients with chronic otitis media submitted to underlay tympanoplasty and divided at random into three groups: control with no transitory implant, latex membrane group, and sylastic® membrane group.
RESULTS: Greater graft vascularization occurred in the latex membrane group (p<0.05). Good biocompatibility was obtained with the use of the latex and silicone implants, with no effect on the occurrence of infection, otorrhea or otorragy.
CONCLUSION: The use of a transitory latex implant induced greater graft vascularization, with a biocompatible interaction with the tissue of the human tympanic membrane.

Key words: Tympanic Membrane. Tympanoplasty. Wound Healing. Latex.

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Bridgestone rubber tree research pays off - Modern Tire Dealer

Bridgestone rubber tree research pays offModern Tire DealerThis new genome data is expected to facilitate development of improved breeding technologies and growing methods for natural rubber trees (Hevea brasiliensis).
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Europeans turn to guayule and Russian dandelion as sources of latex - Gizmag

Europeans turn to guayule and Russian dandelion as sources of latex - Gizmag | Hevea brasiliensis | Scoop.it
Europeans turn to guayule and Russian dandelion as sources of latexGizmagHevea brasiliensis is vulnerable to several pests and it depends on very specific climate conditions that are exclusive to tropical zones.
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Thai, Indonesian rubber sold at 4-year lows - trade

Thai, Indonesian rubber sold at 4-year lows - trade | Hevea brasiliensis | Scoop.it
SINGAPORE, July 25 (Reuters) - Thai and Indonesian rubber were traded at their weakest level in at least four years after a steep fall in price-setting Tok.
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The Ruins of Fordlândia

The Ruins of Fordlândia | Hevea brasiliensis | Scoop.it

In the early 20th century, a cartel of Dutch and English rubber barons had a stranglehold on the vast majority of the world’s supply of rubber. At that time the sole source of rubber was the South American tree Hevea brasiliensis, whose sap is natural latex. In the 1870s a gaggle of entrepreneurial smugglers had secreted a stash of wild rubber tree seeds out of the Amazon rain forest, which they used to establish sprawling plantations in East Asia. These smothered the output of Brazil, causing their owners to eventually enjoy the majority of the world’s rubber business.

 

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First tyres using natural rubber produced in Europe

First tyres using natural rubber produced in Europe | Hevea brasiliensis | Scoop.it
All the latex used in Europe is imported and is mainly extracted from the rubber tree Hevea brasiliensis. The biggest producers worldwide are Malaysia, Indonesia and Thailand, three Asian countries that virtually hold a world ...
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TOKYO -- Bridgestone Corporation announced that it ... - PLASTICS

PLASTICS: TOKYO -- Bridgestone Corporation announced that it has successfully decoded the main genome sequence*1 for Hevea brasiliensis*2 a euphorbiaceous plant material for producing latex*3 — commonly known ...
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Bridgestone claims NR research breakthroughs - Tire Business

Bridgestone claims NR research breakthroughsTire BusinessTOKYO (July 10, 2012) -- Bridgestone Corp.
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Green Smoke Reviews | China and India Drives Growth in the ...

Green Smoke Reviews | China and India Drives Growth in the ... | Hevea brasiliensis | Scoop.it
Natural rubber is produced from the Hevea brasiliensis trees, both in the form of field coagulum as well as latex. While field coagulum is the auto-coagulated latex in the coagulation cups or on the tapping panel, latex is a ...
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Bridgestone EUROPE

Bridgestone EUROPE | Hevea brasiliensis | Scoop.it
Bridgestone, the world's largest tyre and rubber company, manufactures tires for cars, 4x4s, motorcycles, vans, trucks and industrial vehicles.
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Research Project Successfully Decodes Genome sequence of Para Rubber Tree - Equities.com

Research Project Successfully Decodes Genome sequence of Para Rubber Tree - Equities.com | Hevea brasiliensis | Scoop.it
Research Project Successfully Decodes Genome sequence of Para Rubber TreeEquities.comTOKYO -- Bridgestone Corporation today announced that it has successfully decoded the main genome sequence for Hevea brasiliensis a euphorbiaceous plant material ...
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Thailand negotiates with China for more rubber exports

Thailand negotiates with China for more rubber exports | Hevea brasiliensis | Scoop.it
BANGKOK, June 28 — Thailand's Agriculture and Cooperatives Ministry is seeking to boost the country's rubber exports to China, a key Thai market, in an attempt to help local rubber growers suffering from falling rubber ...
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Hydroxynitrile Lyases with α/β-Hydrolase Fold: Two Enzymes with Almost Identical 3D Structures but Opposite Enantioselectivities and Different Reaction Mechanisms - Andexer - 2012 - ChemBioChem - W...

Hydroxynitrile Lyases with α/β-Hydrolase Fold: Two Enzymes with Almost Identical 3D Structures but Opposite Enantioselectivities and Different Reaction Mechanisms - Andexer - 2012 - ChemBioChem - W... | Hevea brasiliensis | Scoop.it

Hydroxynitrile lyases (HNLs) catalyze the cleavage of cyanohydrins to yield hydrocyanic acid (HCN) and the respective carbonyl compound and are key enzymes in the process of cyanogenesis in plants. In organic syntheses, HNLs are used as biocatalysts for the formation of enantiopure cyanohydrins. We determined the structure of the recently identified, R-selective HNL from Arabidopsis thaliana (AtHNL) at a crystallographic resolution of 2.5 Å. The structure exhibits an α/β-hydrolase fold, very similar to the homologous, but S-selective, HNL from Hevea brasiliensis (HbHNL). The similarities also extend to the active sites of these enzymes, with a Ser-His-Asp catalytic triad present in all three cases. In order to elucidate the mode of substrate binding and to understand the unexpected opposite enantioselectivity of AtHNL, complexes of the enzyme with both (R)- and (S)-mandelonitrile were modeled using molecular docking simulations. Compared to the complex of HbHNL with (S)-mandelonitrile, the calculations produced an approximate mirror image binding mode of the substrate with the phenyl rings located at very similar positions, but with the cyano groups pointing in opposite directions. A catalytic mechanism for AtHNL is proposed, in which His236 from the catalytic triad acts as a general base and the emerging negative charge on the cyano group is stabilized by main-chain amide groups and an α-helix dipole very similar to α/β-hydrolases. This mechanistic proposal is additionally supported by mutagenesis studies.

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A Heaven of Allergomes: Rubber Tree (Hevea brasiliensis)

A Heaven of Allergomes: Rubber Tree (Hevea brasiliensis) : is an account of diversity [not at all genome-wide!
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First Tires Using Natural Rubber Produced in Europe - Product Design & Development

First Tires Using Natural Rubber Produced in Europe - Product Design & Development | Hevea brasiliensis | Scoop.it
Product Design & DevelopmentFirst Tires Using Natural Rubber Produced in EuropeProduct Design & DevelopmentAll the latex used in Europe is imported and is mainly extracted from the rubber tree Hevea brasiliensis.
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These Tires Are Made from Dandelions and Soy | Smart News

These Tires Are Made from Dandelions and Soy | Smart News | Hevea brasiliensis | Scoop.it
Hevea brasiliensis is vulnerable to several pests and it depends on very specific climate conditions that are exclusive to tropical zones. Besides, guayule and Russian dandelion do not cause allergic reactions, which is also a ...
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Up to 15% growth in demand for rubber gloves seen

Up to 15% growth in demand for rubber gloves seen | Hevea brasiliensis | Scoop.it
PETALING JAYA: Latex prices' downtrend will continue in the next few months due to improved supply and relatively stable demand, according to Top Glove Co.
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World Allergy Organization - Allergic Diseases Resource Center | Allergy, Asthma and Immunology

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Vredestein makes Tyre prototypes from Russian dandelions, guayule

Vredestein makes Tyre prototypes from Russian dandelions, guayule | Hevea brasiliensis | Scoop.it
The development is part of the firm's involvement in the EU-Pearls project, which is developing two alternatives for natural rubber from the rubber tree (hevea brasiliensis). This week, Apollo Vredestein produced tires made ...
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Bridgestone Makes Breakthrough in Rubber Tree Disease Detection - Tire Review

Bridgestone Makes Breakthrough in Rubber Tree Disease Detection - Tire Review | Hevea brasiliensis | Scoop.it
Tire ReviewBridgestone Makes Breakthrough in Rubber Tree Disease DetectionTire ReviewA strong recent focus at Bridgestone Corp., as at several other tiremakers, has been on researching alternatives to natural rubber sourced from the Hevea...
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Green Car Congress: USDA awards Cooper Tire & Rubber and ...

Green Car Congress: USDA awards Cooper Tire & Rubber and ... | Hevea brasiliensis | Scoop.it
The US Department of Agriculture (USDA) has awarded Cooper Tire & Rubber and its consortium partners a 4-year, $6.9-million grant to support research efforts to develop enhanced manufacturing processes, testing and ...
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BRIDGESTONE -Research Project Successfully Decodes Genome sequence of ... - Equities.com

BRIDGESTONE -Research Project Successfully Decodes Genome sequence of ... - Equities.com | Hevea brasiliensis | Scoop.it
Tire ReviewBRIDGESTONE -Research Project Successfully Decodes Genome sequence of ...Equities.comRelease date- 10072012 - TOKYO - Bridgestone Corporation today announced that it has successfully decoded the main genome sequence*1 for Hevea brasiliensis*2...
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Research Advances Disease Diagnostic Technology for ‘Hevea brasiliensis’ Natural Rubber Trees | Bridgestone Corporation | JPubb.com

Research Advances Disease Diagnostic Technology for ‘Hevea brasiliensis’ Natural Rubber Trees | Bridgestone Corporation | JPubb.com | Hevea brasiliensis | Scoop.it
Research Advances Disease Diagnostic Technology for ‘Hevea brasiliensis’ Natural Rubber Trees - 07/10 Bridgeston...
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Satellite surveys to tap India's rubber growing areas

Agartala, Jun 29 — The Rubber Board and a Indian Space Research Organisation (ISRO) are conducting satellite imagery surveys to learn intensity areas of healthy rubber cultivation in India, an central pronounced here ...
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