PREMISE OF THE STUDY Our goal was to infer the phylogenetic relationships and historical biogeography of the genus Dryopteris with a focus on taxa in sub-Saharan Africa and neighboring islands. In general, little is known about the relationships between African fern species and their congeners in other geographic regions, and our aim was to determine whether the sub-Saharan African species of D...

Within-stand variation in understory species composition and biomass was studied in 16 even-aged stands of mixed Red Alder Sitka Spruce Western Hemlock (Alnus rubra Picea sitchensis Tsuga heterophylla) forest. The sites were upland sites, and the stands were 28-39 years old. We compared understory within three categories of microsite types: Red Alder-dominated, conifer-dominated, and mixed alde...

Differential induction of squamous cell carcinomas, adeno mas, and adenocarcinomas was observed in the lungs of male C57BL/6 and C3H/He mice after repeated intratracheal instil lation of benzo(a)pyrene (BP) and charcoal powder suspended in 0.9% NaCI solution. When a high dose of BP (1.0 mg BP and 0.5 mg charcoal powder) was instilled intratracheally once a week for 8 weeks or when a low dose of...

Abstrak. Gayo Lues adalah salah satu kabupaten yang terletak di dataran tinggi Provinsi Aceh. Wilayah Kabupaten ini berada pada ketinggian 500 – 2.000 m dpl, dengan luas wilayah 5.719, 58 km². Hutan lindung terdapat satunya hutan berbatasan langsung Taman Nasional Gunung Leuser (TNGL) dikenal nama Rainforest Lodge Kedah. Kedah Desa Penosan Sepakat, Kecamatan Blangjeranggo, Lues. Tumbuhan paku (...

Fragmentation of natural habitats is one of the main causes of the loss of biodiversity. However, all plants do not respond to habitat fragmentation in the same way due to differences in species traits. We studied the effect of patch size and isolation on the biodiversity of vegetation in the mixed-oak forests in the north of the Iberian Peninsula. The aim was to evaluate whether all the growth...

PRYER, K. M., and D. M. BRITTON. 1983. Spore studies in the genus Gymnocarpiurn. Can. J. Bot. 61: 377-388. Scanning electron microscopy was used to examine the variation in perispore characters within and between six currently recognized taxa of the genus Gyrnnocarpiurn Newm. in North America. Representative scanning electron micrographs are presented and depict the perispore features observed....

Dendritic cells (DCs) are the major specialized antigen-presenting cells for the development of optimal T-cell immunity. DCs can be used as pharmacological targets to monitor novel biological modifiers for the cure of harmful immune responses, such as transplantation rejection. Dryopteris crassirhizoma Nakai (Aspiadaceae) is used for traditional herbal medicine in the region of East Asia. The r...

Neuronal NO plays a functional role in many vascular tissues, including MAs (mesenteric arteries). Glucocorticoids alter NO release from endothelium and the CNS (central nervous system), but no results from peripheral innervation have been reported. In the present study we investigated the effects of dexamethasone on EFS (electrical field stimulation)-induced NO release in MAs from WKY (Wistar-...

BACKGROUND Cornus mas L, an olive-shaped red-colored single-seeded fruit, is used in traditional medicine in different parts of Europe and Asia. OBJECTIVES In the present study, 40 male Wistar rats were randomly divided into five groups, and the effects of 21 days of intraperitoneally (IP) administration of 50, 200 and 400 mg/kg body weight of C. mas hydro-methanolic extract on the rats hemat...