Results 21 to 30 of about 552,804 (363)

Differentation of Scots pine (Pinus sylvestris L.) seed orchard in Gidyle on basin of morphological needles trains

open access: yesActa Biologica, 2016
The subject of this study was to analyse the variation of Scots pine (Pinus sylvestris L.) seed orchard with regard to a complex of 9 morpho-anatomical traits of needles. The following measurements were carried out: needle length, number of resin canals,
Renata Słonimska-Walkowiak   +1 more
doaj   +1 more source

Unprecedented Centimeter-Long Carbon Nitride Needles: Synthesis, Characterization and Applications.

open access: yesSmall, 2018
Free standing centimeter-long 1D nanostructures are highly attractive for electronic and optoelectronic devices due to their unique photophysical and electrical properties.
J. Barrio   +8 more
semanticscholar   +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

How Placebo Needles Differ From Placebo Pills?

open access: yesFrontiers in Psychiatry, 2018
Because acupuncture treatment is defined by the process of needles penetrating the body, placebo needles were originally developed with non-penetrating mechanisms.
Younbyoung Chae, Ye-Seul Lee, P. Enck
semanticscholar   +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

Needle placement errors: do we need steerable needles in interventional radiology?

open access: yesMedical devices, 2018
Purpose Accurate and precise needle placement is of utmost importance in interventional radiology. However, targeting can be challenging due to, eg, tissue motion and deformation.
T. D. de Jong   +5 more
semanticscholar   +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

Stability of Norway spruce (Picea abies [L.] Karst.) stands in the Beskid Śląski and Beskid Żywiecki Mts. from the aspect of their nutrition status

open access: yesJournal of Forest Science, 2008
The aim of the present research was to determine the stability of spruce stands in the areas of threat to forest stability in the Beskid Śląski and Beskid Żywiecki Mts. in the light of their nutrition. In 2002 samples of soil and of one- and two-year-old
J. Barszcz, S. Małek
doaj   +1 more source

Morphometric characteristics and the content of plastid pigments of the needles of Picea pungens depending on the distance from the highways

open access: yesBiosystems Diversity, 2017
This article examines the condition of the Picea pungens Engelm. plants at various distances from urban highways with high traffic intensity. The objects of the study were the trees P. pungens, whose age was about 35 years. The plants grow on four plots.
V. P. Bessonova, O. A. Ponomaryova
doaj   +1 more source

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