Results 11 to 20 of about 500,069 (263)

Puente para paso de peatones, en Iowa

open access: yesInformes de la Construccion, 1964
La pasarela recientemente construida en Des Moines (EE. UU.), presenta la notable particularidad de tener sus accesos en curva y apoyarse sobre pilares de forma cilíndrica.
- Howard   +3 more
doaj   +1 more source

Photosynthetic pigments of the Siberian spruce needles in the middle taiga forests of the European North-East Russia [PDF]

open access: yesСибирский лесной журнал, 2017
The seasonal changes in content and ratio of chlorophylls and carotenoids in the Siberian spruce Picea obovata Ledeb. needles growing in bilberry, bilberry-sphagnum and polytric-sphagnum forest types in the middle taiga subzone of the European North-East
V. V. Tuzhilkina
doaj   +1 more source

The changes of colouring and content of photosynthetic pigments in unevenaged needles of Picea pungens Engelm. in conditions of urban plantings

open access: yesІнтродукція Рослин, 2019
Objective – is to analyze the content of chlorophylls and carotenoids in the 1–4-year-old blue-coloured needles of Picea pungens Engelm. trees in street plantings of Kryvyi Rih city exposed to emissions of large metallurgical combine as well growing in ...
I.I. Korshykov   +2 more
doaj   +1 more source

Anatomical differences between Pinus mugs Truro populations from the Tarts Mts.. expressed in needle traits and in needle and cone traits together

open access: yesActa Societatis Botanicorum Poloniae, 2014
Two-year-old needles were collected from 429 individuals of dwarf mountain pine (Pius mugn Turra) from 10 populations of this species growing in the Tatra Mts. (5 populations from calcareous and 5 from calcium-free undersoil).
Maria Bobowicz, Maria Kzrakowa
doaj   +1 more source

Thermostability of antioxidant enzymes in tissues of Scots pine in heat shock conditions [PDF]

open access: yesСибирский лесной журнал, 2017
Samples of needles from the middle part of the crown and cambial zone scrapings, which includes cambium cells and nonlignified xylem cells from five stems of 15 years old Scots pine Pinus sylvestris L.
N. E. Sudachkova   +3 more
doaj   +1 more source

Study on the Component and Distribution Characteristics of Needle-like Inclusions in Rose Quartz

open access: yesYankuang ceshi, 2018
BACKGROUND The needle-like inclusions in rose quartz are considered to be rutile or dumortierite, and their orientation is related to the c-axis. However, there is no consensus on this statement.
HU Zhe, GUO Ying
doaj   +1 more source

PSEUDOANEURISMA DA ARTÉRIA FEMORAL PROFUNDA

open access: yesAngiologia e Cirurgia Vascular, 2019
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Miguel Lemos Gomes   +3 more
doaj   +1 more source

Features of elemental composition and pigment complex of the Siberian larch needles under impact of Irkutsk aluminum smelter emissions [PDF]

open access: yesСибирский лесной журнал, 2022
The paper presents data on the content of 32 chemical elements in the needles of the Siberian larch Larix sibirica Ledeb. trees growing at different distances from the Irkutsk aluminum smelter (IrkAS), as well as in the background areas. It is shown that
L. V. Afanas’eva   +3 more
doaj   +1 more source

A comparative study of the needle folded mesophyll in Pinus and Cedrus (Pinaceae) species

open access: yesИзвестия высших учебных заведений. Поволжский регион: Естественные науки, 2022
Background. The structure of the assimilatory tissue of the leaves at conifers studied mainly on cross-sections. The purpose of the study is to compare the features of the 3D forms of assimilative cells and the structure of the needle mesophyll in the ...
G.K. Zvereva
doaj   +1 more source

Imaging and Spectroscopy of Natural Fluorophores in Pine Needles

open access: yesPlants, 2018
Many plant tissues fluoresce due to the natural fluorophores present in cell walls or within the cell protoplast or lumen. While lignin and chlorophyll are well-known fluorophores, other components are less well characterized.
L. Donaldson, N. Williams
semanticscholar   +1 more source

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