TAILIEUCHUNG - Review of the Existing Techniques for the Determination of Dry Rubber Content in Natural

Hevea brasiliensis, a forest tree, which is indigenous to the tropical rain forests of Central and South America and the only major commercial source of natural rubber (NR), is one of the most recently domesticated crop species in the world. The modern age of NR in India actually started during the 1870s when the British successfully transported Hevea seeds from Brazil for planting in the then British India1.'. Rubber seems to be a fairly straightforward word. The French call it Caoutchouc recognizing its historically South American Indian word, meaning weeping wood':", Polyisoprene, especially when chemically modified by vulcanization, has remarkable ability to substantially return to its original shape after. | CHAPTER ONE Review of the Existing Techniques for the Determination of Dry Rubber Content in Natural Rubber Latex Introduction Hevea brasiliensis a forest tree which is indigenous to the tropical rain forests of Central and South America and the only major commercial source of natural rubber NR is one of the most recently domesticated crop species in the world. The modern age of NR in India actually started during the 1870s when the British successfully transported Hevea seeds from Brazil for planting in the then British India1 2. Rubber seems to be a fairly straightforward word. The French call it Caoutchouc recognizing its historically South American Indian word meaning weeping wood3 4. Polyisoprene especially when chemically modified by vulcanization has remarkable ability to substantially return to its original shape after being stretched considerably. Any material which fulfills this requirement is entitled to be called rubber5. The ASTM D 1566 gives a more detailed definition of rubber. Polyisoprene extracted from Hevea brasiliensis is called natural rubber NR . This elastic property of rubber eventually led to a multi-billion 1 dollar industry worldwide and has influenced the lives of a large number of people on this planet6. The British planters initiated rubber cultivation on a plantation scale and the state administration encouraged them by providing land labour capital and trade facilities. In 1862 a policy for the issue of land suitable for the cultivation of plantation crop was formulated7. The liberal rules formulated in Travancore during 1860s and subsequently in Cochin for the distribution of forest and wasteland for plantation crops were instrumental for the initial growth and expansion8 9. In terms of productivity growth in area and production and the extent of price realization at the farm gate the Indian plantation industry is ahead of all the other major natural rubber NR producing countries in the world. Owing to the pace of development in

• Lâm nghiệp
• International reference
• Development Goal
• Median price
• Plant Antioxidative
• Heavy Metal Toxicity
• Genetic and Molecular
• International Marketing Plan Guide
• International Marketing
• Research Methodology
• For reference purpose here
• Recommended marketing strategy
• Situational Analysis content
• Alternative Angle
• State Perspective
• Alternative Recognition
• Customary International
• Reference to Foucault
• Human Right
• Wide spread silent issue
• Causes of stress
• International Agricultural Research Institute
• Information Technology Sector
• Job related stress
• Definition of Mass
• International Prototype
• Mass Standards
• Experimental Procedures
• Reference Kilograms
• Mercury Contamination
• Check Your Vocabulary
• IELTS Examination
• English skills
• Test English
• International reference materials IELTS exam
• IELTS exam preparation materials
• Vocabulary for English
• information technology
• international certification
• network cisco
• Network Design
• Unified CCX
• Cisco Unified IP IVR
• Enterprise QoS
• Campus QoS Design
• Cisco IPCC Express
• Call Center Sizing
• IP Security
• Troubleshooting
• V3PN Solution
• Cisco IP Telephony
• Cisco CallManager
• Cisco Stream
• Manager Application
• network Security
• Service Building
• IP Telephony
• Business Ready
• WAN Infrastructure
• Call Routing
• business
• Management
• Economics
• Business ethics
• Business mediator
• dispensing and reviewing
• healthcare professionals
• prescribed medicines
• population based