U.S.-Malaysia Cooperative Research on the Chemistry of Mangrove Bark Tannins

本提案要求资助路易斯安那州立大学林学教授Elvin T. Choong博士与印度尼西亚茂物农业大学化学讲师Suminar S. Achmadi博士进行为期24个月的红树林树皮单宁化学合作研究项目。丙酮-水溶液将用于提取印尼红树林中Bruguiera sp.和Rhizophora sp.树皮中的单宁。将粗单宁提取物进行分馏，并对其结构、分子量分布和成分化合物的鉴定进行表征。这些化合物将被进一步研究作为特种化学品的潜在用途。东南亚的红树林构成了巨大的木材和树皮可再生资源。通过适当的管理，这种资源可以在不影响其在河口生态中的重要作用的情况下被开发利用。印度尼西亚拥有世界上20%的红树林。红树林的树皮是鞣质的重要来源，鞣质用于皮革制造和布料防腐处理。红树林树皮也是活性酚的来源，在各种特殊化学应用中都很有用。合作者将从红树林中分离、表征和鉴定单宁。美国和印度尼西亚的合作者在这项提议的领域有成功合作的记录。该项目与发展中国家科学项目的目标相关，该项目旨在通过科学信息、思想、技能和技术的交流以及在互利问题上的合作，提高美国和发展中国家科学家和工程师之间的合作水平。

This proposal requests funds to permit Dr. Elvin T. Choong, Professor of Forestry, Louisiana State University, to pursue with Dr. Suminar S. Achmadi, Lecturer in Chemistry, Bogor Agricultural University, Indonesia, for a period of 24 months, a program of cooperative research on the chemistry of mangrove bark tannins. An acetone-water solution will be used to extract tannins from the bark of Bruguiera sp. and Rhizophora sp. - tree species from mangrove forests of Indonesia. The crude tannin extracts will be fractionated, and the fractions will be characterized for structure, molecular weight distribution, and identification of constituent compounds. These compounds will be further studied for potential uses as specialty chemicals. The mangrove forests of Southeast Asia constitute a huge renewable resource of wood and bark. With proper management, this resource could be exploited without affecting its essential role in estuary ecology. Indonesia contains 20% of the world's mangrove forests. The bark from mangrove trees is an important source of tannins which are used for leather manufacture and preservative treatment of cloth. Mangrove bark is also the source of reactive phenols which are useful in a wide variety of specialty chemical applications. The collaborators will isolate, characterize, and identify tannins from mangrove trees. The U.S. and Indonesian collaborators have a record of successful collaboration in the field of the proposal. This project is relevant to the objectives of the Science in Developing Countries Program which seeks to increase the level of cooperation between U.S. and developing country scientists and engineers through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit.