نتایج جستجو برای: black stem

تعداد نتایج: 416896  

Journal: :Forests 2021

In temperate European forests invaded by Prunus serotina Ehrh. (black cherry), a reduction in the spontaneous regeneration capacity of Pinus sylvestris L. (Scots pine) is observed. It could be caused various factors, including allelopathic properties this invasive plant. study phytotoxic effect P. volatile compounds on and seasonal variation were assessed. Simple assays showed that volatiles em...

Journal: :Journal of Forestry 2023

Abstract Hardwoods resprouting after wildfire or cutting develop as multistemmed clumps that gradually self-thin over time. There is increasing interest in thinning of sprouting species to accelerate the formation tree characteristics important indigenous cultural practices and wildlife such large-diameter stems, large branches, broad crowns, acorn production. We compared responses three treatm...

We present a general study on a high performance supercapacitor based on intercalated reduced graphene oxide with carbon black nanoparticles. Graphene oxide sheets were synthesized by oxidation and exfoliation of natural graphite and were reduced using hydroiodic acid in the presence of carbon black nanoparticles. Graphene paper was fabricated by one-step procedure via simultaneous reducing and...

 Development of materials with the ideal black body absorption spectrum are of great interest. Such materials could improve the efficiency of solar cells, and passive cooling and heat transfer systems as well as the protective and decorative coatings. Fabricating black anodizing coatings is promising for this purpose because they exhibit low light reflection from the surface. Such coatings can ...

ابراهیم زاده عطاری, وحیده, رف رف, مریم, طبیبی, هادی, قربانی, ابوالفضل, پورقاسم گرگری, بهرام,

Background and Objective: Black seed (Nigella sativa L.) is one of the most revered medicinal plants which has been used to treat many diseases including hypercholesterolemia in some folk medicines. The aim of this study was to examine the effect of dietary supplementation with crushed black seed on serum lipid profile, body weight and food intake in hyperlipidemic rabbits. Materials and Method...

Journal: Journal of Herbal Drugs 2016

Background & Aim: Black seed or black cumin (Nigella sativa L.) belongs the family Ranunculaceae. Black seed is one of these species, which is naturally distributed in different parts of the country. It is extensively cultivated in various regions of Iran.  Experimental: The experiment was achieved using randomized complete block desi...

This study was conducted to assay the effects of methanol foliar application (0, 10, 20 and 30% v/v) and bed cover (control, white and black covers) on yield and some physiological traits of marigold as a factorial based on RCBD. The results revealed the significant interaction effects of bed cover and methanol foliar application on chlorophyll a content and plant height. The highest plant heig...

Hasan Jahangiri, Pourya Mehdizadeh

To prevent serious electromagnetic interference, a single-layer and double layer wave-absorbing coating employing complex absorbents composed of carbon black with epoxy resin as matrix was prepared. The morphologies of carbon black /epoxy composites were characterized by scanning electron microscope  and atomic force microscope, respectively. The carbon black  particles exhibit obvious polyarom...

ژورنال: سلامت و محیط زیست 2011
سمرقندی, محمد رضا, شاهرخی, الهام, ضرابی, منصور, نوروزی, مهدی, نوری سپهر, محمد,

Backgrounds and Objectives: Treatment of colored wastewater is one of the important challenges of environmental engineers. Adsorption process is a key option for removal of organic matter from wastewater. The aim of present work was to investigate pumice stone as an adsorbent for removal of Acid Black 1 from aqueous solution.Materials and Methods: Removal of Acid Black 1 by pumice stone was inv...

This study was conducted to investigate the effects of different levels of black cumin powder on performance, yolk cholesterol content and egg oxidative stability in laying hens. A total of 96 Leghorn laying hens (Hy-Line W-36) of 25 weeks old were randomly distributed among eight cage replicates of three birds each. Experimental diets consisted of different levels (0, 5, 10 and 15 g/kg of diet...

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