Results 1 to 10 of about 3,332,297 (288)

Nonrelativistic Green's Function for Systems with Position-Dependent Mass [PDF]

open access: yesInternational Journal of Theoretical Physics, 2003
Given a spatially dependent mass we obtain the two-point Green's function for exactly solvable nonrelativistic problems. This is accomplished by mapping the wave equation for these systems into well-known exactly solvable Schrodinger equations with constant mass using point canonical transformation.
A D Alhaidari
exaly   +4 more sources

Economic efficiency of cultivation of agricultural crops on green mass

open access: yesНовые технологии, 2022
The purpose of the scientific work was to assess the economic efficiency of cultivating red clover and mixed soybean and corn crops for green mass, depending on the use of increasing doses of nitrogen fertilizers.
O. A. Blagopoluchnaya, N. I. Devterova
doaj   +3 more sources

Optimising the configuration of green supply chains under mass personalisation

open access: yesInternational Journal of Production Research, 2020
To achieve sustainable development, manufacturing firms should consider both environmental protection and customers’ growing personalised demands in supply chain management. Although research on sustainable manufacturing with focus on green supply chain management is increasing, only a few studies have emphasised the significance of mass ...
Jianming Yao
exaly   +2 more sources

YIELD AND BIOCHEMICAL STATUS OF CORN DEPENDING ON THE MINERAL NUTRITION AND THE PLANT POPULATION DENSITY [PDF]

open access: yesVolga Region Farmland, 2022
The article presents the results of studies on the effect of various dosages and methods of applying mineral fertilizers on the formation of yield and biochemical composition of corn phytomass depending on the density of standing plants. The studies were
S.A. Semina   +2 more
doaj   +1 more source

The use of the health belief model to assess U.S. college students’ perceptions of COVID-19 and adherence to preventive measures

open access: yesJournal of Public Health Research, 2021
Background: This study utilized the Health Belief Model to examine college students’ perceptions of the COVID-19 pandemic. It examined the extent to which the Health Belief Model and perceived threat are associated with the adoption of COVID-19 ...
Saud A. Alsulaiman, Terry L. Rentner
doaj   +1 more source

The Atomic Gas Mass of Green Pea Galaxies [PDF]

open access: yesThe Astrophysical Journal Letters, 2021
Abstract We have used the Arecibo Telescope and the Green Bank Telescope (GBT) to carry out a deep search for Hi 21 cm emission from a large sample of “Green Pea” galaxies, yielding 19 detections, and 21 upper limits on the Hi mass. We obtain Hi masses of M Hi ≈ (4–300) × 108 M
N. Kanekar   +6 more
openaire   +2 more sources

Productivity, feed quality and bioenergetic estimation of cultivation of the sainfoin varieties and promising lines

open access: yesЗерновое хозяйство России, 2022
The current paper has presented the estimation results of productivity, feed quality and bioenergetic efficiency of cultivation of the sainfoin varieties and promising lines. The study was carried out at the FSBSI «ARC «Donskoy» in 2019–2022. The objects
S. A. Ignatiev   +4 more
doaj   +1 more source

Varietal Characteristics of Jerusalem Artichoke as a High Nutritional Value Crop for Herbivorous Animal Husbandry

open access: yesApplied Sciences, 2022
Jerusalem artichoke (Helianthus tuberosus L.) is considered to be one of the most promising multipurpose bioenergetic crops. The goal of this study was to carry out laboratory and field research regarding the tops and tubers of 16 Jerusalem artichoke (JA)
Aleksandra A. Manokhina   +4 more
doaj   +1 more source

Selection value of nonpubescent soybean lines [Glycine max (L.) Merrill] for different uses

open access: yesPlant Varieties Studying and Protection, 2020
Purpose. Create a new source material of soybeans without pubescence, determine its selection value for the efficient use of processed products in animal nutrition, which will ensure high productivity of the latter.
Л. Г. Білявська   +3 more
doaj   +1 more source

Enantiomeric composition of essential oils Ocimum L. components [PDF]

open access: yesТехника и технология пищевых производств, 2018
Basil Ocimum L. belongs to the perspective aromatic and essential-oil plants. Its green mass and essential oils can be successfully used in different sectors of economy including food industry. In 56 samples of basil Ocimum L. having different ecological
Sachyuka T.   +3 more
doaj   +1 more source

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