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Evaluation of unconstrained and constrained mathematical functions to model girth growth of rubber trees (Hevea brasiliensis) using young age measurements - Springer

Evaluation of unconstrained and constrained mathematical functions to model girth growth of rubber trees (Hevea brasiliensis) using young age measurements - Springer | Hevea brasiliensis | Scoop.it

Abstract

No attempt has been made to date to model growth in girth of rubber tree (Hevea brasiliansis). We evaluated the few widely used growth functions to identify the most parsimonious and biologically reasonable model for describing the girth growth of young rubber trees based on an incomplete set of young age measurements. Monthly data for girth of immature trees (age 2 to 12 years) from two locations were subjected to modelling. Re-parameterized, unconstrained and constrained growth functions of Richards (RM), Gompertz (GM) and the monomolecular model (MM) were fitted to data. Duration of growth was the constraint introduced. In the first stage, we attempted a population average (PA) model to capture the trend in growth. The best PA model was fitted as a subject specific (SS) model. We used appropriate error variance-covariance structure to account for correlation due to repeated measurements over time. Unconstrained functions underestimated the asymptotic maximum that did not reflect the carrying capacity of the locations. Underestimations were attributed to the partial set of measurements made during the early growth phase of the trees. MM proved superior to RM and GM. In the random coefficient models, both Gf and G0 appeared to be influenced by tree level effects. Inclusion of diagonal definite positive matrix removed the correlation between random effects. The results were similar at both locations. In the overall assessment MM appeared as the candidate model for studying the girth-age relationships in Hevea trees. Based on the fitted model we conclude that, in Hevea trees, growth rate is maintained at maximum value at t0, then decreases until the final state at dG/dt ≥0, resulting in yield curve with no period of accelerating growth. One physiological explanation is that photosynthetic activity in Hevea trees decreases as girth increases and constructive metabolism is larger than destructive metabolism.

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Base Cation Leaching From the Canopy of a Rubber (Hevea brasiliensis Willd. Muell-Arg) Plantation at Ikenne, South West Nigeria

Base Cation Leaching From the Canopy of a Rubber (Hevea brasiliensis Willd. Muell-Arg) Plantation at Ikenne, South West Nigeria | Hevea brasiliensis | Scoop.it

Abstract

Base cations are essential to the sustainability of forest ecosystems. They are important for neutralizing the acidifying effects of atmospheric deposition. There is the need for in-depth understanding of base cation depletion and leaching from forest canopy. This is important particularly due to the increasing acidification and anthropogenic influences that alter biogeochemistry of the ecosystems. Availability and leaching of base cations (Ca2+, Na+, P, and K+) from the tree canopies were examined in two rubber (Hevea brasiliensis Willd. Muell-Arg) stands (40- and 15-year-old) in southwestern part of Nigeria. The chemical composition of throughfall in the area was dominated by calcium. Concentrations of Ca2+, Na+, P, and K+ were relatively high throughout the sampling periods. Significant differences (P < 0.05) were observed between precipitation and throughfall in concentrations of nutrient elements, and the enrichment occurred within the rubber plantation for all the nutrient elements. Ca2+ is mainly from precipitation , while over 70% of total K and total Mg were probably leach from canopy. Total annual nutrient returns via throughfall for the 15-year-old stand were 28.39, 4.49, 38.9, and 3.54 kg ha year -1 for Ca2+, Mg2+, K+ and Na+ respectively, while that of the 40-year-old stand were 22.7, 3.64, 36.3, and 3.17 kg ha year -1 for Ca2+, Mg2+, K+ and Na+ respectively.

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Differential responses of two rubber tree clones to chilling stress

Chilling stress is one of the most important environmental factors that limit the growth, distribution and
yield of rubber tree in China. The effects of chilling stress on the grated plants of two rubber trees
clones, GT1 and Wenchang217, were studied by physiological methods in controlled light chamber in
order to explore the physiological mechanism of cold tolerance in rubber tree. Our results show a
significant change in the tested physiological parameters after chilling treatment between two rubber
clones. In comparison with the case of rubber tree clone GT1, the level of malondialdehyde (MDA)
increased while superoxide dismutase, especially peroxidase and catalase decreased significantly in
the seedlings of rubber tree clone Wenchang217 in response to chilling stress. As the cold tolerance
ability of rubber tree clone GT1 is stronger than that of rubber tree clone Wenchang217, activation of
oxidative quenching enzyme system should be one of the important factors that determine the cold
tolerance of rubber tree.

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Natural Latex Sensitization and Respiratory Function Among Workers in Latex Glove Factories: A Pilot Study

Natural Latex Sensitization and Respiratory Function Among Workers in Latex Glove Factories: A Pilot Study | Hevea brasiliensis | Scoop.it
(2012). Natural Latex Sensitization and Respiratory Function Among Workers in Latex Glove Factories: A Pilot Study. Journal of Occupational and Environmental Hygiene: Vol. 9, No. 10, pp. D183-D185.
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Some factors affecting in vitro production, germination and viability of conidia of Corynespora cassiicola from Hevea brasiliensis | Fernando | Journal of the National Science Foundation of Sri Lanka

Some factors affecting in vitro production, germination and viability of conidia of Corynespora cassiicola from Hevea brasiliensis | Fernando | Journal of the National Science Foundation of Sri Lanka | Hevea brasiliensis | Scoop.it

Abstract: The fungus Corynespora cassiicola causes the very destructive Corynespora leaf fall disease of Hevea brasiliensis. The present population of C. cassiicola from Sri Lanka includes highly, moderately and poorly sporulating isolates. The fungus sporulated freely on potato dextrose agar at 10 – 35 ºC with a peak at 30 ºC. Cultures showed maximum conidia production after an incubation period of 12 days. Conidia produced well-branched germ tubes from both apices. The percentage germination reduced significantly at 1.5 × 106 conidia / mL. Germination of conidia occurred at temperatures between 5 – 40 ºC with the optimum between 15 – 35 ºC. Free water was not essential for germination but promoted germination. Conidia remained viable when the relative humidity was above 90 % and the ultraviolet radiation (254 nm) inactivated conidia. The most favourable temperature conditions for germination of C. cassiicola conidia described above has been observed to be prevalent in the main rubber growing areas in Sri Lanka, particularly during the period of refoliation, making it favourable for the establishment of the disease.

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Ultrasound Assisted Esterification of Rubber Seed Oil for Biodiesel Production - Diponegoro University | Institutional Repository (UNDIP-IR)

Production of biodiesel is currently shifting from the first to the second generation in which the raw materials are mostly from non-edible type oils and fats. Biodiesel production is commonly conducted under batch operation using mechanical agitation to accelerate mass transfers. The main drawback of oil esterification is the high content of free fatty acids (FFA) which may reduce the yield of biodiesel and prolong the production time (2-5 hours). Ultrasonification has been used in many applications such as component extraction due to its ability to produce cavitation under certain frequency. This research is aimed to facilitate ultrasound system for improving biodiesel production process particularly rubber seed oil. An ultrasound unit was used under constant temperature (40oC) and frequency of 40 Hz. The result showed that ultrasound can reduces the processing time and increases the biodiesel yield significantly. A model to describe correlation of yield and its independent variables is yield (Y) = 43,4894 – 0,6926 X1 + 1,1807 X2 – 7,1042 X3 + 2,6451 X1X2 – 1,6557 X1X3 + 5,7586 X2X3 - 10,5145 X1X2X3, where X1 is mesh sizes, X2 ratio oil: methanol and X3 type of catalyst.

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NR cultivation in Europe and Asian dominance - Daily Mirror

NR cultivation in Europe and Asian dominance - Daily Mirror | Hevea brasiliensis | Scoop.it
NR cultivation in Europe and Asian dominanceDaily MirrorAll the latex used in Europe had been imported and is mainly extracted from the rubber tree Hevea brasiliensis.
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Bannablog: Mixed plantations

Bannablog: Mixed plantations | Hevea brasiliensis | Scoop.it
One row of rubber trees (hevea brasiliensis) inter-cropped with four rows of tea trees (Camellia Sinensis var Assamica). This kind of setting contrasts with the usual vast mono-cultures. According to several papers (here, here ...
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Tires Made Of Dandelion Plants And Latex

Tires Made Of Dandelion Plants And Latex | Hevea brasiliensis | Scoop.it

Tires Made Of Dandelion Plants And Latex

The Dutch tyre company Apollo Vredestein has successfully produced the first prototypes of tyres obtained from natural latex from guayule and Russian dandelion plants. An outcome of the EU-PEARLS ('EU-based production and exploitation of alternative rubber and latex sources') project, the prototypes will be tested before their production is initiated. The researchers say these tyres could find a solid niche in the global market, helping Europe compete against Asian rubber manufacturers. EU-PEARLS received almost EUR 5.9 million under the 'Food, agriculture and fisheries, and biotechnology' (KBBE) Theme of the EU's Seventh Framework Programme (FP7).

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Natural rubber exports to be cut

Natural rubber exports to be cut | Hevea brasiliensis | Scoop.it

Rubber growers in the southern province of Surat Thani rallied in front of their respective provincial halls on Wednesday, demanding that the government urgently solve the problem of low rubber prices.

The protesters handed their written demand to Prime Minister Yingluck Shinawatra through Surat Thani governor Cherdsak Chusri. They called on the government to intervene in the domestic market by purchasing raw rubber at 120 baht (US$3.80) per kilogramme, with the price recently plunging to 85 baht (US$2.69) per kilogramme.

The rubber growers went home after the provincial governor promised to work with the government to urgently solve the problem.

Surat Thani is the political stronghold of former deputy prime minister for security affairs and former Democrat Party secretary general Suthep Thaugsuban.

Last week, Mr Nattawut blamed a slump in rubber prices on the eurozone economic crisis, and defended the government’s unsuccessful attempts to boost the domestic price to 100 baht a kilogramme.

He said the previous previous Democrat Party-led government spent up to 24 months trying to shore up the price of rubber to over 100 baht/kg.

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Identification and characterization of a cis,trans-mixed heptaprenyl diphosphate synthase from Arabidopsis thaliana - Kera - FEBS Journal - Wiley Online Library

Identification and characterization of a cis,trans-mixed heptaprenyl diphosphate synthase from Arabidopsis thaliana - Kera - FEBS Journal - Wiley Online Library | Hevea brasiliensis | Scoop.it

Summary

In eukaryotes, dolichols (C70-120) play indispensable roles as glycosyl carrier lipids in the biosynthesis of glycoproteins on endoplasmic reticulum (ER). In addition to dolichols, seed plants have other types of Z,E-mixed polyisoprenoids termed ficaprenol (tri-trans,poly-cis-polyprenol, C45-75) and betulaprenol (di-trans,poly-cis-polyprenol, C30-45 and C≥70) in abundance. However, the physiological significance of these polyprenols has not been elucidated because of limited information regarding cis-prenyltransferases (cPTs) which catalyze the formation of the structural backbone of Z,E-mixed polyisoprenoids. In the comprehensive identification and characterization of cPT homologues from Arabidopsis thaliana, AtHEPS was identified as a novel cis,trans-mixed heptaprenyl diphosphate synthase. AtHEPS heterologously expressed in Escherichia coli catalyzed the formation of C35 polyisoprenoid as a major product, independent of the chain lengths of all-trans allylic primer substrates. Kinetic analyses revealed that farnesyl diphosphate was the most favorable for AtHEPS among the allylic substrates tested suggesting that AtHEPS was responsible for the formation of C35 betulaprenol. AtHEPS partially suppressed the phenotypes of a yeast cPT mutant deficient in the biosynthesis of dolichols. Moreover, in A. thaliana cells, subcellular localization of AtHEPS on the ER was shown by using GFP-fused proteins. However, a cold stress-inducible expression of AtHEPS suggested that AtHEPS and its product might function in response to abiotic stresses rather than in cell maintenance as a glycosyl carrier lipid on the ER.

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BRIDGESTONE CORP. : Bridgestone Announces Location Plans for Guayule ... - 4-traders

BRIDGESTONE CORP. : Bridgestone Announces Location Plans for Guayule ... - 4-traders | Hevea brasiliensis | Scoop.it
BRIDGESTONE CORP.: Bridgestone Announces Location Plans for Guayule ...4-tradersIn March of this year, BSJ announced the Bridgestone Group's plans for an extensive research project in the United States dedicated to developing Guayule as a commercially...
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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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Colombia Forestal - Characterization of two latex parameters from Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. clones in the Colombian Altillanura

Colombia Forestal - Characterization of two latex parameters from Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. clones in the Colombian Altillanura | Hevea brasiliensis | Scoop.it

ABSTRACT

Latex was characterized from RRIM 600, IAN 873 and FX 3864 Hevea brasiliensis clones, during the third year of tapping in the Colombian Altillanura region. Using random sampling, six tapping systems were evaluated per clone on a monthly basis for ten months. Response variables were Total Solids Content (TSC) and Dry Rubber Content (DRC) in latex. Data was adjusted by covariance analysis and matrices for comparison among response variables were generated for tapping system for each clone. Annual average rate of TSC and DRC was statistically different among treatments. The greater average TSC (36.8 % - 46.3%) and DRC (35.5 % - 43.4 %) occurred in systems without tapping stimulant application. Higher precipitation resulted in a decrease in average DRC values for all clones.

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Purification of a Protease Inhibitor from Hevea brasiliensis cell suspension and it’s effect on the growth of Phytophthora palmivora - Online First - Springer

Purification of a Protease Inhibitor from Hevea brasiliensis cell suspension and it’s effect on the growth of Phytophthora palmivora - Online First - Springer | Hevea brasiliensis | Scoop.it

Protease inhibitors (PIs) are one family of pathogenesis-related proteins (PR-proteins) that play essential roles in defense mechanisms against an attack by a pathogenic microorganism or insect. Cell suspension derived from a seed integument of rubber tree (Hevea brasiliensis) treated for 48 h with 20 μM copper sulphate, an abiotic elicitor, had an increased production of PIs. The intracellular PIs were detected in an extract of treated cells; however, much higher levels of PIs were found in the medium (extracellular). Using azocasein as substrate, these PIs possessed strong inhibitory activity against subtilisin A but not against trypsin, chymotrysin and papain. These extracellular PIs were purified by anion exchange chromatography, DEAE-Sepharose (CL-6B), eluted with 0.06 M NaCl in 20 mM Tris-HCl (pH 7.0). The active fractions were then subjected to native and SDS preparative gel electrophoresis, respectively. A single band of a purified PI with a molecular weight of 25 kDa was revealed after a tricine SDS-PAGE and stained with silver nitrate. The yield of this purified protein was 3.14 ng.g−1. The activity of the purified PI was stable up to 70 °C, and its activity was retained in the buffer pH values of 2–10. The biological activity of the obtained PI was investigated. It was found that the PI at 5 μg.mL−1 (0.2 μM) inhibited the mycelium growth of Phytophthora palmivora, a rubber tree pathogen.

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ScienceDirect.com - Plant Physiology and Biochemistry - Proteome analysis of the large and the small rubber particles of Hevea brasiliensis using 2D-DIGE

ScienceDirect.com - Plant Physiology and Biochemistry - Proteome analysis of the large and the small rubber particles of Hevea brasiliensis using 2D-DIGE | Hevea brasiliensis | Scoop.it

Abstract

The rubber particle is a specialized organelle in which natural rubber is synthesised and stored in the laticifers of Heveabrasiliensis (para rubber tree). It has been demonstrated that the small rubber particles (SRPs) has higher rubber biosynthesis ratio than the large rubber particles (LRPs), but the underlying molecular mechanism still remains unknown. In this study, LRPs and SRPs were firstly separated from the fresh latex using differential centrifugation, and two-dimensional difference in-gel electrophoresis (2D-DIGE) combined with MALDI-TOF/TOF was then applied to investigate the proteomic alterations associated with the changed rubber biosynthesis capacity between LRPs and SRPs. A total of 53 spots corresponding to 22 gene products, were significantly altered with the |ratio| ≥ 2.0 and T value ≤0.05, among which 15 proteins were up-regulated and 7 were down-regulated in the SRPs compared with the LRPs. The 15 up-regulated proteins in the SRPs included small rubber particle protein (SRPP), 3-hydroxy-3-methylglutaryl-CoA synthase (HMGCS), phospholipase D alpha (PLD α), ethylene response factor 2, eukaryotic translation initiation factor 5A isoform IV (eIF 5A-4), 70-kDa heat shock cognate protein (HSC 70), several unknown proteins, etc., whereas the 7 up-regulated proteins in the LRPs were rubber elongation factor (REF, 19.6 kDa), ASR-like protein 1, REF-like stress-related protein 1, a putative phosphoglyceride transfer family protein, β-1,3-glucanase, a putative retroelement, and a hypothetical protein. Since several proteins related to rubber biosynthesis were differentially expressed between LRPs and SRPs, the comparative proteome data may provide useful insights into understanding the mechanism involved in rubber biosynthesis and latex coagulation in H. brasiliensis.

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Regulation of 3-Hydroxy-3-Methylglutaryl-CoA Synthase and 3-Hydroxy-3-Methylglutaryl-CoA Reductase and Rubber Biosynthesis of Hevea brasiliensis (B.H.K.) Mull. Arg - Springer

Regulation of 3-Hydroxy-3-Methylglutaryl-CoA Synthase and 3-Hydroxy-3-Methylglutaryl-CoA Reductase and Rubber Biosynthesis of Hevea brasiliensis (B.H.K.) Mull. Arg - Springer | Hevea brasiliensis | Scoop.it

It is rather well established that rubber biosynthesis in rubber trees (Hevea brasiliensis) takes place in laticifers and is dependent on mevalonate (MVA). 3-Hydroxy-3-methylglutaryl coenzyme A reductase (HMGR, EC 1.1.1.34) has been shown to catalyze a rate-limiting step in this pathway. However, our studies demonstrated that both 3-hydroxy-3-methylglutaryl coenzyme A synthase (HMGS, EC 2.3.3.10) and HMGR are essential enzymes involved in rubber biosynthesis. In this chapter, we report on the current information as to the regulation of both HMGS and HMGR and their effect on rubber biosynthesis in H. brasiliensis. Hevea HMGS is encoded by a small gene family consisting of hmgs-1 and hmgs-2. The available information concerning the nature of the gene(s) encoding HMGS is also summarized. Enzyme activity and mRNA transcripts were mainly found in tissues with more laticifers, the sites of rubber biosynthesis. In latex of the high-yielding rubber clone, hmgs mRNA levels and enzyme activity were significantly higher than in the latex of the low-yield variety. Furthermore, the mRNA transcripts and enzyme activity in latex were higher at night than daytime, which is reflected by the dry rubber content. Ethephon treatment, which is known to increase the latex yield, had a direct effect on both hmgs mRNA transcripts and enzyme activity. The hmgs mRNA levels and dried rubber content per tapping from intra­clone rubber trees were also shown to be highly correlated. HMG-CoA acts as a substrate for HMGR to form mevalonate, which is further converted to isoprenoid compounds as well as natural rubber. Three genes are known to encode HMGR in H. brasiliensis, namely, hmgr-1, hmgr-2, and hmgr-3, and hmgr-1 is likely to be involved in rubber biosynthesis. The hmgr-1 mRNA level was well correlated with dried rubber content, similar to those observed in the case of hmgs gene expression.

These findings clearly indicated that both HMGS and HMGR enzyme activities are involved in early steps of rubber biosynthesis in H. brasiliensis at the level of their gene expression. The two enzymes possibly function in concert in response to the supply of substrate for rubber biosynthesis, similar to the synthesis of cholesterol in animals.

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IntroductionProperties of H. brasiliensis HMGS and HMGR EnzymesMolecular Biology of HMGSRole of HMGS and HMGR in Rubber BiosynthesisConclusionReferences

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Latex C-serum from Hevea brasiliensis induces non-apoptotic cell death in hepatocellular carcinoma cell line (HepG2) - Lam - 2012 - Cell Proliferation - Wiley Online Library

Latex C-serum from Hevea brasiliensis induces non-apoptotic cell death in hepatocellular carcinoma cell line (HepG2) - Lam - 2012 - Cell Proliferation - Wiley Online Library | Hevea brasiliensis | Scoop.it

Abstract

Objectives

Latex from Hevea brasiliensis (natural rubber tree primarily cultivated for its rubber particles) has no known primary metabolic function, although its biological role is as a plant defence system. The present study has evaluated specific anti-proliferative effects of latex whole C-serum and its subfractions, on human cancer cell lines.

Materials and methods

Cell viability assay using MTT, DNA fragmentation assay and real-time PCR were used to evaluate the cytotoxic effects of latex whole C-serum and its subfractions on the cell lines.

Results

MTT assay revealed very low LC50 values, 2.0 and 280 ng/ml, for DCS and DCP treatments, respectively. DCS was proven to be more potent compared to DCP, in conferring specific anti-proliferative effects on the cancer cell lines. The study also indicated that anti-proliferative activity of pre-heated C-serum fractions diminished significantly.

Conclusion

Although noteworthy cell death was reported, DNA fragmentation assay and real-time PCR confirmed that that induced by latex C-serum subfractions was not promoted via the classical apoptotic signalling pathway.

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Over-expression of a cytosolic isoform of the HbCuZnSOD gene in Hevea brasiliensis changes its response to a water deficit - Springer

Over-expression of a cytosolic isoform of the HbCuZnSOD gene in Hevea brasiliensis changes its response to a water deficit - Springer | Hevea brasiliensis | Scoop.it

Abstract

Hevea brasiliensis is the main commercial source of natural rubber. Reactive oxygen species (ROS) scavenging systems are involved in various biotic and abiotic stresses. Genetic engineering was undertaken to study the strengthening of plant defences by antioxidants. To that end, Hevea transgenic plant lines over-expressing a Hevea brasiliensis cytosolic HbCuZnSOD gene were successfully established and regenerated. Over-expression of the HbCuZnSOD gene was not clearly related to an increase in SOD activity in plant leaves. The impact of HbCuZnSOD gene over-expression in somatic embryogenesis and in plant development are presented and discussed. The water deficit tolerance of two HbCuZnSOD over-expressing lines was evaluated. The physiological parameters of transgenic plantlets subjected to a water deficit suggested that plants from line TS4T8An displayed lower stomatal conductance and a higher proline content. Over-expression of the HbCuZnSOD gene and activation of all ROS-scavenging enzymes also suggested that protection against ROS was more efficient in the TS4T8An transgenic line.

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Malaysia's 2013 Palm Oil, Rubber Output to Rise on Improving ...

Malaysia's 2013 Palm Oil, Rubber Output to Rise on Improving ... | Hevea brasiliensis | Scoop.it
{+++} By Shie-Lynn Lim KUALA LUMPUR--Rubber and crude palm oil output in Malaysia may rise next year, helped by maturing trees and increased land.
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Rubber grown with tea? It's being tried in West Bengal

Rubber grown with tea? It's being tried in West Bengal | Hevea brasiliensis | Scoop.it
Rubber grown with tea? It's being tried ...And if the experiment turns successful, inter-crop..."If we get a positive result from the Nagraka..."Natural rubber and tea will grow side by sid...India is now ranked first in rubber ...
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Saranpal Chhabra's comment, October 29, 2012 7:56 AM
Hmm.interesting..But how would it be done?
Biswapriya Biswavas Misra's comment, November 3, 2012 8:39 AM
Sounds like you are interested in growing Sandalwood for Biotechnology or anything in general. Kindly elaborate and I would love to interact, learn, grow and collaborate on same. Please feel free to email at: bbmisraccb@gmail.com. Thanks...looking forward to...TC, Bye..
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More R&D to stretch Malaysia’s rubber industry further

More R&D to stretch Malaysia’s rubber industry further | Hevea brasiliensis | Scoop.it

KUALA LUMPUR – Five new research and development facilities for the rubber production sector are in the pipeline, said Deputy Prime Minister Tan Sri Muhyiddin Yassin.

He added that this was a part of the Government Economic Transfor­mation Plan’s efforts to promote the rubber industry, especially in the production of rubber gloves, as a key driver of the economy.

Muhyiddin said Malaysia continued to be the world’s largest producer of rubber gloves, supplying more than 60% of the global demand and he expected the industry to continue growing.

The Gross National Income contributed by the rubber sector in 2020 is expected to rise to RM52.9 billion, of which 56.7% or RM30 billion will be from the glove industry alone.

“The existence and operations of these R&D facilities will create a more conducive environment and opportunities for the business community in the rubber industry to generate investments and reinvestments,” Muhyiddin said at the opening of the Sixth International Rubber Glove Conference Exhibition (IRGCE) 2012 held recently.

The conference aims to provide a platform for rubber glove industry players to exchange information on business and technological developments in the sector.

Last year, it was reported that approved investments in rubber products totaled RM629.5 million, of which 74.4% were in the rubber gloves sector.

Domestic investments amounted to RM538.3 million (85.5%) while foreign investments totaled RM91.2 million.

Last year, Malaysia’s export earnings from rubber gloves was RM9.89 billion, an increase of 10.9% from 2010. Rubber gloves exports from Jan­uary to March this year amounted to RM4.3 billion.( Source: The Star )

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Kevin's GATTACA World: MERmaid: a parallel genome assembler ...

Kevin's GATTACA World: MERmaid: a parallel genome assembler ... | Hevea brasiliensis | Scoop.it
Sequencing of the most impressive snake - the king cobra - The genome of the worlds largest venomous snake, the king cobra, has been sequenced and analysed by researchers from the Dutch company ZF-screens.
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Hydroxynitrile Lyases with α/β-Hydrolase Fold - Fr Francium

... 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) ...
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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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