Results 21 to 30 of about 931,672 (300)

CARDINAL TEMPERATURES FOR GERMINATION OF THE MEDICINAL ANDDESERT PLANT, Calotropis procera [PDF]

open access: yesPlanta Daninha, 2015
Calotropis procera, Apocynaceae, is a wild perennial shrub that originated in the Persian deserts. It is known to provide key resources in degraded ecosystems to about 80 animal species. C.
M. TAGHVAEI, H. SADEGHI, N. KHAEF
doaj   +1 more source

Nanocarbons from acid pretreated waste coffee grounds using microwave radiation [PDF]

open access: yes, 2017
This study investigates the use of microwave radiation to produce nanocarbons from Waste Coffee Grounds (WCG). It is first step to demonstrate the potential of integrating the microwave power to conventional methods of carbonaceous materials and ...
Gyamera, Benjamin Asenso   +2 more
core   +1 more source

Response of chickpea seed germination to varying temperatures

open access: yesJournal of Agrometeorology, 2009
Fifteen cultivars of chickpea were evaluated by having vigour test viz. percent germination, shoot length, root length, dry matter per seedling, vigour index and growth rate index.
SURENDER SINGH, DIWAN SINGH, V.U.M. RAO
doaj   +1 more source

Survey of Optimal Temperature and Moisture for Worms Growth and Operating Vermicompost Production of Food Wastes [PDF]

open access: yesسلامت و محیط, 2009
"n "nBackground and Objectives:Nowadays vermicompost production of food wastes is posed as one of appropriate methods to food wastes. disposal, its production used in agriculture and gardening.
A Eslami, A Nabaey, R Rostami
doaj  

PROCEDURE FOR DETERMINING PROCESS CHARACTERISTICS OF FRICTION STIR WELDING

open access: yesNauka ta progres transportu, 2018
Purpose. The study is aimed at improving the procedure for determining the optimum radius of the shoulder of a special tool for friction stir welding (FSW) of aluminum alloys and its change depending on the variations of base metal thickness. Methodology.
S. O. Plitchenko
doaj   +1 more source

A comparative study of the thermal ranges of three germination criteria of a tropical tree with bioeconomic interest: Carapa surinamensis Miq. (Meliaceae)

open access: yesBrazilian Journal of Biology, 2018
Species of the Carapa spp. complex, occurring in the Neotropics, Africa and India, have multiple uses, including timber, with the seed oil being used in phyto-pharmaceutical products and cosmetics.
S. C. Amoêdo, I. D. K. Ferraz
doaj   +1 more source

Effects of Climate Change on Temperature Sensitivity of Vegetation Growth in Huang-Huai-Hai Plain: Spatial–Temporal Dynamics and Ecological Adaptability

open access: yesRemote Sensing
This paper explores the optimal temperature change in normalized difference vegetation index (NDVI) growth in the Huang-Huai-Hai Plain under the background of climate change, aiming to better cope with the impact of global warming on vegetation growth ...
Yuexuan Cheng   +3 more
doaj   +1 more source

Effect of warm and cold stratification, and ethanol treatment on germination of Corylopsis seeds

open access: yesHorticultural Science, 2016
Seed germination experiments with Corylopsis coreana, C. sinensis var. calvescens, and Corylopsis gotoana were conducted. Corylopsis coreana seeds were treated at 5o, 7.5o, 10o, 12.5o and 20oC to study the upper temperature limit to break dormancy. Seeds
J.H. Kim, A.K. Lee, J.K. Suh
doaj   +1 more source

Nozzle contours for minimum particle-lag loss [PDF]

open access: yes, 1963
The flow of a gas-particle mixture through a rocket nozzle is analyzed under the approximation that the particle slip velocity is small compared with the average mixture velocity, using one-dimensional gasdynamics, the Stokes drag law, and corresponding ...
Marble, Frank E.
core   +1 more source

Effects of drought on optimum temperature of carbon fluxes in temperate grasslands

open access: yesEnvironmental Research Letters
Ecosystem carbon flux components, including ecosystem gross primary productivity (GPP), ecosystem respiration (ER), and net ecosystem productivity (NEP), are the most direct indicators of ecosystem production capacity, carbon sequestration, and climate ...
Tiancheng Su   +4 more
doaj   +1 more source

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