background and aims: herbal medicines are the major remedy in traditional medical systems and have a great contribution in maintaining human health and preventing many infectious diseases. the aim of this study was to assay antibacterial potential of marrubium vulgare l. extract against klebsiella pneumoniae resistant strains to current antibiotics and also gc/ms analysis to better understandin...

Silvicultural operation need to notice the plant species diversity in forest. To this study Gomarlang district in marivan region, northern zagros forest was selected. Selected 100 ha area because have similar physiography condition (north aspect and 1650 to 1800 m s.a.l. In study area 100 micro plots of 5m by 5 m (25 m2) including the species and the numbers of this species randomize...

References 1. Levene H. (1953). Genetic equilibrium when more than one ecological niche is available. Am. Nat. 87, 331–333. 2. Antonovics, J. (1968). Evolution in closely adjacent plant populations. V. Evolution for self-fertility. Heredity 23, 219–238. 3. Lenormand T., and Otto S.P. (2000). The evolution of recombination in heterogeneous environments. Genetics 156, 423–438. 4. Coluccio, A., an...

Abstract We present the first results of a multiyear program to map orbits M-dwarf multiples within 25 pc. The observations were conducted primarily during 2019–2020 using speckle interferometry at Southern Astrophysical Research Telescope in Chile, High-Resolution Camera mounted on adaptive optics module (HRCam+SAM). sample nearby M dwarfs is drawn from three sources: RECONS long-term astromet...

Meloidogyne hapla, Pratylenchus penetrans, and Helicotylenchus dihystera, reduced the growth of 'Saranac AR alfalfa seedlings when applied at concentrations of 50 nematodes per plant. All except P. penetrans reduced seedling growth when applied at 25 per seedling. M. hapla reduced growth when applied at 12 per seedling. Nematodes interacted with three pseudomonads to produce greater growth redu...

to study the effects of plant density and nitrogen rates on the ability of canola (regent  cobra; an inbred variety) to compete with weeds, an experiment was conducted as a factorial complete block design with four replications. the treatments included four levels of plant density at 150, 190, 230, and 270 plants m-2, and four levels of nitrogen (n) fertil-izer at 0, 46, 92, and 138 kg ha–1. r...