Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters

Natural rubber or Hevea brasiliensis (Willd. ex A, Juss.) Mull. Arg.) inherently possesses high molecular weight (Mw) and have a wide range of molecular weight distribution (MWD) which are vital since physical properties and processing ability of rubber products are influenced by it. However, numero...

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Main Author:	Muniandy, Kavitha
Format:	Thesis
Language:	English
Published:	2019
Subjects:	QH1-278.5 Natural history (General)
Online Access:	http://eprints.usm.my/46609/1/Full%20thesis%20final%20submission24.pdf
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id	my-usm-ep.46609
record_format	uketd_dc
spelling	my-usm-ep.466092020-06-24T08:04:44Z Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters 2019-04 Muniandy, Kavitha QH1-278.5 Natural history (General) Natural rubber or Hevea brasiliensis (Willd. ex A, Juss.) Mull. Arg.) inherently possesses high molecular weight (Mw) and have a wide range of molecular weight distribution (MWD) which are vital since physical properties and processing ability of rubber products are influenced by it. However, numerous aspects that may regulate rubber Mw including agroclimatical parameters are poorly investigated. Hence, this study was undertaken to profile Mw and MWD of natural rubber derived from four Malaysian clones of H. brasiliensis (RRIM 600, RRIM 929, PB350 and RRIM 3001) based on agroclimatical parameters. Latex of ten years old rubber tree were collected in a local Malaysian plantation for a duration of 12 months using gel permeation chromatography and was statistically analysed to determine factoring parameters and extent of impact on Mw trend while observing changes in Ð peak. During the experimental period, the Mw were found to be highly variable ranging from an average of 0.71 × 106 Da to 1.69 × 106 Da among the clones. PB 350 yielded rubber with consistent average Mw throughout the sampling period as compared to RRIM 600, RRIM 929 and RRIM 3001. In respect to MWD, typical unimodal and bimodal distribution were prevalent in all samples as expected. Pearson’s correlation coefficient between Mw of tested clones and agroclimatic elements showed moderate association at significance level of p=0.05. Multiple regression models were developed based on clones and agroclimatical factors to explain the variability observed in respective Mw. 2019-04 Thesis http://eprints.usm.my/46609/ http://eprints.usm.my/46609/1/Full%20thesis%20final%20submission24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kajihayat
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QH1-278.5 Natural history (General)
spellingShingle	QH1-278.5 Natural history (General) Muniandy, Kavitha Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters
description	Natural rubber or Hevea brasiliensis (Willd. ex A, Juss.) Mull. Arg.) inherently possesses high molecular weight (Mw) and have a wide range of molecular weight distribution (MWD) which are vital since physical properties and processing ability of rubber products are influenced by it. However, numerous aspects that may regulate rubber Mw including agroclimatical parameters are poorly investigated. Hence, this study was undertaken to profile Mw and MWD of natural rubber derived from four Malaysian clones of H. brasiliensis (RRIM 600, RRIM 929, PB350 and RRIM 3001) based on agroclimatical parameters. Latex of ten years old rubber tree were collected in a local Malaysian plantation for a duration of 12 months using gel permeation chromatography and was statistically analysed to determine factoring parameters and extent of impact on Mw trend while observing changes in Ð peak. During the experimental period, the Mw were found to be highly variable ranging from an average of 0.71 × 106 Da to 1.69 × 106 Da among the clones. PB 350 yielded rubber with consistent average Mw throughout the sampling period as compared to RRIM 600, RRIM 929 and RRIM 3001. In respect to MWD, typical unimodal and bimodal distribution were prevalent in all samples as expected. Pearson’s correlation coefficient between Mw of tested clones and agroclimatic elements showed moderate association at significance level of p=0.05. Multiple regression models were developed based on clones and agroclimatical factors to explain the variability observed in respective Mw.
format	Thesis
qualification_level	Master's degree
author	Muniandy, Kavitha
author_facet	Muniandy, Kavitha
author_sort	Muniandy, Kavitha
title	Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters
title_short	Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters
title_full	Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters
title_fullStr	Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters
title_full_unstemmed	Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters
title_sort	molecular weight profiling of natural rubber from selected malaysian hevea brasiliensis clones and its relationship with agroclimatic parameters
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kajihayat
publishDate	2019
url	http://eprints.usm.my/46609/1/Full%20thesis%20final%20submission24.pdf
_version_	1747821695980273664

Molecular Weight Profiling Of Natural Rubber From Selected Malaysian Hevea Brasiliensis Clones And Its Relationship With Agroclimatic Parameters

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