نتایج جستجو برای: protection of forests

تعداد نتایج: 21185772  

1999
M. Gunatilake

Much of the world’s gene pool is located in tropical rainforests, which are being destroyed at an alarming rate. Proper management of protected forests is crucial to avoid further loss of biodiversity. Resource extraction by local communities can be a major obstacle in the management of protected forests. This paper develops a two sector dynamic model for agriculture and forest resource extract...

2016
MARK GREEN

Mr. GREEN of Wisconsin. Mr. Chairman, I submit the following resolutions for the RECORD. Whereas, our National Forests were established in the 1920’s for multiple use including soil and water protection, recreation, and timber production, and; Whereas, harvesting is an integral component of multiple-use management of forest lands, and; Whereas, it is not in the best interest of sustainable ecos...

Journal: :international journal of advanced biological and biomedical research 2014
efat jafari mostafa assadi gholam abbas ghanbarian

the genus calendula belongs to tribe calenduleae, (asteraceae family). itmorphologically studied for the ongoing project of the flora of iran. based on the herbarium studies and field observation, this genus has been revised. the study was based on fresh material from field as well as herbarium specimens. all specimens existed in the herbarium of research institute of forests and rangelands (ta...

Journal: :applied biotechnology reports 0
seyed javad davarpanah applied biotechnology research center, baqiyatallah university of medical sciences, tehran, iran mehrdad lahouti department of biology, faculty of science, fer-dowsi university of mashhad, mashhad, iran ramin karimian applied biotechnology research center, baqiyatallah university of medical sciences, tehran,

common yew taxus baccata l. is an evergreen, slow growing   tree, indigenous of hyrcanian forests in iran. discovery of paclitaxel as an   anti tumor agent in the bark of taxus has increased importance of this   plant for treatment of breast and ovary cancer, especially 7000 women die annually   due to breast cancer in iran. regarding destructive method of paclitaxel   production and protection...

2016
Miaoying Shi Jiaguo Qi Runsheng Yin

Since the late 1990s, China has been implementing one of the largest ecological restoration initiatives in not only the country but also the world—the Natural Forest Protection Program (NFPP). An overarching question is how severe the regional deforestation had become before the NFPP was initiated and whether the forest condition in the protected area has significantly improved afterwards. The ...

2007
Barbara Taubert Jürgen Pretzsch

Despite rapidly ongoing globalisation, some forests in Kenya are managed by local people in a traditional and sustainable way. It is assumed that the related perception of forest use by local people is based on specific values and attitudes. The aim of this paper is to investigate intangible forest-related values and attitudes of the Tiriki, tribal villagers living around the Kakamega forest in...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...

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