antioxidants are vital substances which possess the ability to protect the body from damage caused by free radical-induced oxidative stress. a variety of free radical scavenging antioxidants exist within the body which many of them are derived from dietary sources like fruits, vegetables and teas. this article describes a test method for screening the antioxidant activity of 60 iranian plants o...

A rapid, simple, sensitive and reproducible RP-HPLC method was developed for the determination of conessine (bioactive steroidal alkaloid) in Holarrhena pubescens, a highly valued medicinal plant extensively used in pharmaceuticals. Separation was achieved on Discovery (R) RP Amide C16 Supelco column (250 μm x 4.6 μm ID) using a mobile phase of acetonitrile: water (95:5 v/v) with flow rate 0.6 ...

Phyllostachys pubescens is a woody bamboo with the highest ecological, economic, and cultural values of all bamboos in Asia. There is more genomic data available for P. pubescens than for any other bamboo species, including 2.12-Mb genome survey sequences (GSS) and 11.4-Mb full-length cDNA sequences (FL-cDNAs) currently deposited in GenBank. Analysis of these sequences revealed that trans...

Holarrhena pubescens Wall. ex G. Don (H. pubescens), belonging to the Apocynaceae family, is distributed in deciduous forests of tropical Himalayas. H. an important traditional medicinal plant, especially its seeds and barks. Therefore, we assessed antioxidant capacity extracts Lipopolysaccharide (LPS)-induced dendritic cells (DCs) for sepsis treatment. Our results indicated that with different...

Logging in tropical forests may create large canopy openings. These gaps provide suitable conditions for some opportunistic shrubs and herbs to take advantage of the surge in resources and rapidly colonize disturbed sites. This dense plant cover may limit forest regeneration by interfering with tree seedling establishment, growth, and survival by altering the light and nutrients available to se...

We compared the cytotoxic activities of thymus-dependent and thymus-independent CD8(+) T cells. Thymus-dependent CD8(+) T cells, which are foreign antigen specific, acquired cytotoxic activity to tumor cells with a basal dose of the antigen peptides and to hybridoma cells expressing anti-TCR mAb only after differentiation into effector cytotoxic T lymphocytes (CTL). In contrast, thymus-independ...

Hybridization may lead to introgression of genes among species. Introgression may be bidirectional or unidirectional, depending on factors such as the demography of the hybridizing species, or the nature of reproductive barriers between them. Previous microsatellite studies suggested bidirectional introgression between diploid Betula nana (dwarf birch) and tetraploid B. pubescens (downy birch) ...