Results 31 to 40 of about 404 (279)

Micromorphology and anatomy of the flower of Zephyranthes candida (Amaryllidaceae)

open access: yesRegulatory Mechanisms in Biosystems, 2021
The use of morphological features of flowers in the taxonomy of plants is becoming increasingly important. The structure of the Zephyranthes candida (Lindl.) Herb.
O. S. Fishchuk
doaj   +1 more source

Decomposition of Vertical Velocity and Its Zonal Wavenumber Kinetic Energy Spectra in the Hydrostatic Atmosphere

open access: yesJournal of the Atmospheric Sciences, 2023
Abstract The spectrum of kinetic energy of vertical motions (VKE) is less well understood compared to the kinetic energy spectrum of horizontal motions (HKE). One challenge that has limited progress in describing the VKE spectrum is a lack of a unified approach to the decomposition of vertical velocities associated with the Rossby motions and inertia ...
Nedjeljka Žagar   +4 more
openaire   +2 more sources

The soils elemental composition of vertical zonality of the Western Tien Shan [PDF]

open access: yesBulletin of Science and Practice, 2019
The elemental composition allows to obtain information about the principles of humic acids structure, some of their properties, as well as to identify chemical changes and processes occurring in the process of humification. Studies of the elemental composition of humic acids of the main types and subtypes of soils of the vertical zoning of the Western ...
Raupova N., Abdullaev S.
openaire   +2 more sources

The flower morphology in three Convallariaceae species with various attractive traits

open access: yesActa Agrobotanica, 2017
The general morphology and micromorphology of the flower in Polygonatum multiflorum, Maianthemum bifolium, and Convallaria majalis were studied using light microscopy methods. Among the studied species, P. multiflorum and C.
Anastasia Odintsova, Oksana Fishchuk
doaj   +1 more source

Hydrogeochemical conditions of the Mesozoic hydrogeological basin within the Ravninnoe oil field

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2022
Studies of the hydrogeochemical features of groundwater in deep horizons of the West Siberian megabasin are important. They are closely related to applied and fundamental issues of oil and gas hydrogeology and allow studying the processes of formation ...
Yu. I. Salnikova, V. A. Beshentsev
doaj   +1 more source

High-grade iron ores in the laterite weathering crust after the banded iron formation in the Simandou mountain range, Republic of Guinea

open access: yesРуды и металлы, 2023
In West Africa, in the southeastern Guinea, in the Simandou Range region underlain by the Archean gneiss-granite basement, a north–south synclinorium structure is extended, that is composed of the Lower Proterozoic series of metamorphic rocks.
Bolonin A. V.   +2 more
doaj   +1 more source

Vertical structure of anthropogenic zonal‐mean atmospheric circulation change [PDF]

open access: yesGeophysical Research Letters, 2008
The atmospheric circulation changes predicted by climate models are often described using sea level pressure, which generally shows a strengthening of the mid‐latitude westerlies. Recent observed variability is dominated by the Northern Annular Mode (NAM) which is equivalent barotropic, so that wind variations of the same sign are seen at all levels ...
openaire   +3 more sources

From surface structures to the integral depth model of the Kirovograd ore region (Ukrainian Shield). 1

open access: yesГеофизический журнал, 2010
The discovery of a middle-scale mantle trough in the Kirovograd ore district under uranium, gold and lithium deposits brought a new insight into metallogeny of the district and made it necessary to trace its surface structures to the M boundary.In this ...
V. I. Starostenko   +7 more
doaj   +1 more source

The impact of climate changes on the ranges of invertebrates (Diptera, Molluska) in Tavush province of Armenia

open access: yesЮг России: экология, развитие, 2023
Aim. The work’s aim is to study the species composition of invertebrates (Insecta, Molluska) of the Tavush province of Armenia and changes of their ranges due to climatic conditions.Material and Methods.
V. S. Hovhannisyan   +7 more
doaj   +1 more source

Some aspects of biogeography with reference to zoning of the Far- Eastern Seas of Russia and adjacent waters of the Pacific Ocean

open access: yesИзвестия ТИНРО, 2015
Formation of biogeography, its methodological features, and its status as interdisciplinary science combining biological and geographical aspects are discussed.
Oleg A. Ivanov, Vitaly V. Sukhanov
doaj   +1 more source

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