Results 21 to 30 of about 404 (279)

Stable Isotope Ratios δ18O, δ13C in Petroleum Geology Application

open access: yesGeoresursy
Isotopic studies are currently among the most prioritized methods for addressing critical challenges in petroleum geology, particularly in determining the nature and sources of organic matter. This paper briefly presents the results of utilizing isotopic
E. A. Krasnova   +5 more
doaj   +2 more sources

High-resolution electrical resistivity tomography for quantitative interpretation of sub-surface karst structures: A case study in Southwest China

open access: yesGeoderma
Soil-epikarst thickness and near surface characteristics are important components in understanding surface and groundwater interactions in karst environments.
Weiwei Jiang   +5 more
doaj   +2 more sources

Viability assessment and transplantation of fatty liver grafts using end‐ischemic normothermic machine perfusion

open access: yesLiver Transplantation, EarlyView., 2022
Abstract End‐ischemic viability testing by normothermic machine perfusion (NMP) represents an effective strategy to recover liver grafts having initially been discarded for liver transplantation (LT). However, its results in the setting of significant (≥30%) macrovesicular steatosis (MaS) have not been specifically assessed.
Damiano Patrono   +8 more
wiley   +1 more source

Introduction of breeding samples of meadow clover according to economically valuable characteristics using modern breeding methods [PDF]

open access: yesE3S Web of Conferences, 2023
The paper presents the results of research on the formation of complex hybrid populations, an assessment of the collection samples of clover on a complex of economically valuable traits for the creation of forage varieties.
Gasiev V.I., Lushchenko G.V.
doaj   +1 more source

VERTICAL MINERAL ZONALITY OF THE SAN FERNANDO VOLCANOGENIC MASSIVE SULPHIDE DEPOSIT, CUBA

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2020
From ten to fifteen percent of the global supply of copper, zinc and lead, as well as a significant amount of silver, gold, cadmium, selenium, tin, bismuth and barium are mined from massive sulphide deposits.
D. De La Nuez Colon
doaj   +1 more source

A zoogeographical analysis of the vertical structure of the North Tian-Shanian butterfly fauna (Lepidoptera: Rhopalocera) and the questions of the faunagenesis in Central Asia [PDF]

open access: yesКавказский энтомологический бюллетень, 2012
A zoogeographical analysis performed for vertical structures of the butterfly fauna of North TianShan. The arealogical structure of this fauna includes 46 types of areals, grouped in 3 complexes (226 species).
S.K. Korb
doaj   +1 more source

The gynoecium comparative morphology of some representatives of Ornithogaloideae (Hyacinthaceae)

open access: yesБіологічні студії, 2018
The gynoecium micromorphology of Dipcadi brevifolium (Dipcadieae, Ornithogaloideae), Ornithogalum fimbriatum, Ornithogalum dubium, Ornithogalum orthophyllum subsp. kochii (Ornithogaleae, Ornithogaloideae) was studied. Three main parts of the ovary of the
O .O. Dyka
doaj   +1 more source

Large-extent spatial heterogeneity of soil bioavailable micronutrients and the relative roles of environmental indicators on them within maize fields

open access: yesEcological Indicators, 2021
Soil bioavailable micronutrients have a significant impact on soil fertility, soil quality, maize production, and even environmental quality. However, minimal research has been conducted to characterize the spatial patterns of soil bioavailable ...
Hongfen Zhu   +3 more
doaj   +1 more source

Vertical zonality of the gynoecium in Sansevieria Thunb. and Dracaena Vand. ex L. species (Asparagaceae)

open access: yes, 2014
In ten Sansevieria and two Dracaena species the vertical zonality of the gynoecium after W. Leinfellner (1950), as well as the structure of the septal nectary after the concept of its vertical zonality were studied. It was revealed four vertical zones in
Odintsova A., Fishchuk O.
core   +2 more sources

ОБ ЭКОЛОГИЧЕСКИХ НИШ ТЛЕЙ

open access: yes, 2022
The article presents data obtained by studying the influence of vertical zonality on changes in ecological niches of aphids and discussing in this regard the problems of ecological niches of ...
Alizhon Khusanov
core   +1 more source

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