Results 21 to 30 of about 1,228,773 (219)

Reaction of fiber flax varieties to seeding rates, sowing time and optimization of mineral nutrition on sod-podzolic medium- cultivated soils in the Pskov region

open access: yesАграрная наука Евро-Северо-Востока, 2020
The article presents the results of scientific research for 2014-2019 on the reaction of early-maturing fiber flax varieties (Linum usitatissimum L.) of the Pskov selection Peresvet, Kvartet, Voskhod and Dobrynya to growing conditions: sowing time ...
A. D. Stepin   +4 more
doaj   +1 more source

A Few Mode Fiber Temperature Sensor Filled With PDMS Based on Vernier Effect

open access: yesIEEE Photonics Journal, 2021
A few mode fiber temperature sensor filled with PDMS based on vernier effect is proposed. It uses single mode fiber (SMF), few mode fiber (FMF), and polydimethylsiloxane (PDMS) to form the SMF-air microcavity-FMF-PDMS-FMF structure.
Xinghu Fu   +9 more
doaj   +1 more source

Recognition Preference of Rhodamine Derivative Bearing Phthalimido Gly for Hg2+ by UV-Vis and Fluorescence Spectroscopy

open access: yesJournal of Spectroscopy, 2013
An effective Hg2+-specific probe 1 was designed and prepared based on Phthalimido Gly modified rhodamine B. The sensing behavior of probe 1 was studied by UV-Vis and fluorescence spectroscopy.
Fanyong Yan   +5 more
doaj   +1 more source

High-brightness table-top coherent XUV source at 130eV [PDF]

open access: yesEPJ Web of Conferences
We present a highly stable, easy-to-use, table-top coherent XUV source delivering a brightness of >1kW/(mm²sr)/1%BW at 130eV (9.5nm). It is based on high-harmonic generation driven by an ultrastable ytterbium-based fiber laser and a multipass-cell-based ...
Tschernajew Maxim   +8 more
doaj   +1 more source

Preparation of Chiral Epoxy Resins and the Optically Active Cured Products

open access: yesAdvances in Polymer Technology, 2023
Chirality is one of the most common and significant phenomenon in nature, and epoxy resin is one of the most widely used and researched thermosetting resins, however the influences of chiral carbon in epoxy group on the performances of the cured epoxy ...
Xinyuan Tang   +5 more
doaj   +1 more source

In-Situ Detection Method of Jellyfish Based on Improved Faster R-CNN and FP16

open access: yesIEEE Access, 2023
In recent years, large numbers of jellyfish have congregated in marine areas, leading to a decline in other plankton and fisheries. Jellyfish themselves have a certain toxicity and aggression, which have a serious impact on the safety of human life.
Bi Weihong   +5 more
doaj   +1 more source

The Main Problems of Scientific Support of Flax Growing

open access: yesСельскохозяйственные машины и технологии, 2020
Strategic plans for the economic development of the Russian Federation involve an increase in demand for natural fiber products, including linen, which will require an increase in the production of domestic linen in the near future.
R. A. Rostovtsev   +3 more
doaj   +1 more source

Screening of fiber flax varieties from the VIR collection according to flax fiber yield and adaptability parameters in the conditions of the Nortwestern region

open access: yesАграрная наука Евро-Северо-Востока, 2020
The article presents the results of screening of 20 varieties of fiber flax (Linum usitatissimum L.) according to the yield of flax fiber and adaptability parameters in the conditions of the Northwestern region. The variety Dobrynya (Russia) zoned in the
A. D. Stepin   +4 more
doaj   +1 more source

Holomorphic fiber bundles with hyperbolic fiber [PDF]

open access: yesProceedings of the American Mathematical Society, 1974
The purpose of the present note is to show that holomorphic fiber bundles with hyperbolic fiber are almost trivial: They are trivial if the base is simply connected, and have a simple structure otherwise.
openaire   +2 more sources

Technology and implementation of flax stripping in the primary flax processing line

open access: yesСельскохозяйственные машины и технологии, 2023
This paper investigates the utilization of an oscillatory-type working body for the stripping process within the primary fiber flax processing line.
R. A. Rostovtsev   +3 more
doaj   +1 more source

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