Survey and utilization of valuable tropical forest resources

在这项研究中，我们调查了宝贵的热带森林资源，在8个国家边境地区内的泰国与泰国的研究人员之间的合作研究工作，从1999年至2001年。我们每次都去当地市场调查商品林产品，如树叶、蔬菜、水果、餐桌奢侈品、树皮、药用植物等，并进入热带森林调查和收集宝贵的热带森林资源的植物样品。结果如下：1）采集了夹竹桃科、Combretaeae、大戟科、豆科、杜仲科、千屈菜科、茜草科等32科95种植物样品，具有抗菌、抗疟疾、抗炎、抗糖尿病等活性，并含有单宁、树脂、食用奢侈品，通过化学文摘检索了这95种植物的相关文献（Scifinder系统）发现收集的20种物种没有出现在化学文摘中：这些物种可能含有具有各种生物活性的未知化学成分。3)采用不同溶剂对茜草科植物样品进行提取。我们首先在这些提取物中发现了抗幽门螺杆菌活性。4)因此，不仅在泰国，而且在印度-中国，整个东南亚，甚至在非洲和南美洲等地调查这些宝贵的热带森林资源，对保护可持续的热带森林和地球环境具有重要意义。

In this study, we have surveyed valuable tropical forest resources in the 8 national border areas inside Thailand with Thailand researchers as cooperative research work between Japan and Thailand, from 1999 to 2001. Every time, We visited local markets to survey commercial forest products such as wood leaves vegetables, fruits, table luxuries, barks, medicinal plants and so on, and entered into the tropical forest to survey and to collect plant samples of the valuable tropical forest resources. The results are as follows : 1) We collected the plant samples of 95 plant species in 32 families including mainly Apocynaceae, Combretaeae, Euphorbiaceae, Leguminosae, Guttiferae, Lythraceae, Rubiaceae, having anti-bacterial, anti-malaria, anti-inflammatory, anti-diabetic activities, and containing tannin, resin, table luxuries, dyes and so on. 2) We have searched for the references about these 95 plant species by Chemical Abstract (Scifinder system) to find that 20 species collected did not appear in the Chemical Absract: theses species may have interesting possibilities containing unknown chemical constituents with various biological activities. 3) The plant sample of Rubiaceae were extracted with various solvents. We found first of all anti-Helicobacter pylori activity in these extractives. 4) Bark tannins and wood resins were also investigated to find that they have variety of interesting chemical constituents.Thus, it is important to survey such valuable tropical forest resources not only in inside of Thailand, but also in India-China, and whole Southeast Asia, furthermore in Africa and South America and so on, for preserving sustainable tropical forest and the earth-environment in future.