FIRST RADIOCARBON RESULTS OF ONEGA LAKE BOTTOM SEDIMENTS BASED ON CONVENTIONAL AND AMS METHODS

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Measurement of xF3xF_3 and F2F_2 Structure Functions in Low Q2Q^2 Region with the IHEP-JINR Neutrino Detector

The isoscalar structure functions $xF_3$ and $F_2$ are measured as functions of $x$ averaged over all $Q^2$ permissible for the range of 6 to 28 GeV of incident neutrino (anti-neutrino) energy at the IHEP-JINR Neutrino Detector. The QCD analysis of $xF_3$ structure function provides $\Lambda_{\bar{MS}}^{(4)} = (411 \pm 200)$ MeV under the assumption of QCD validity in the region of low $Q^2$. The corresponding value of the strong interaction constant $\alpha_S (M_Z) = 0.123^{+0.010}_{-0.013}$ agrees with the recent result of the CCFR collaboration and with the combined LEP/SLC result.Comment: 11 pages, 1 Postscript figure, LaTeX. Talk given at the 7th International Workshop on Deep Inelastic Scattering and QCD (DIS 99), Zeuthen, Germany, 19-23 Apr 199

Agrofizicheskie svojjstva pochvy i ejo protivoehrozionnaja stabil'nost'

Some agrophysical properties with their relation to soil erosion caused by water flow are discussed. The paper presents an improved equation of the bottom-scouring velocity which is used as a measure of erosion-preventive stability. The main components of the equation are water stability of soil structure and soil cohesion, determined by a new water-jet method.W pracy omówiono niektóre agrofizyczne właściwości gleby w aspekcie zjawisk erozji wodnej, głównie spływu powierzchniowego. Jako miarę stabilności przeciwerozyjnej gleby zastosowano prędkość ścierania dna żłobiny, tj. prędkość krytyczną, rozpoczynającą stałe przemieszczanie cząstek w żłobinie. Autorzy przedstawili ulepszone równanie opisujące tę wielkość. Główne elementy równania stanowią: współczynnik wodoodporności struktury gleby i współczynnik kohezji gleby, wyznaczony według nowej metody polegającej na pomiarze strumienia wody (water jet).В работе рассматриваются некоторые агрофизические свойства почвы со стороны явлений, связанных с водяной эрозией, главным образом с поверхностным стоком. Мерой противоэрозионной стабильности почвы послужила скорость стирания дна ложбины, т.е. критическая скорость, начинающая постоянное перемещение частиц в ложбине. Авторы представили улучшенное уравнение, описывающее эту величину. Главными элементами уравнения являются: коэффициент водоустойчивости структуры почвы и коэффициент когезии почвы, определённый по новому методу, использующему измерение потока воды (water jet)

Raman visualization of micro- and nanoscale domain structures in lithium niobate

International audienc

Luminescent thermometry based on Ba<inf>4</inf>Y<inf>3</inf>F<inf>17</inf>:Pr³⁺ and Ba<inf>4</inf>Y<inf>3</inf>F<inf>17</inf>:Pr³⁺,Yb³⁺ nanoparticles

© 2020 Elsevier Ltd and Techna Group S.r.l. New effective luminescence thermometers based on novel host Ba4Y3F17 doped with Pr3+ and Pr3+/Yb3+ in 80–320 K temperature range were studied. The absolute temperature sensitivity (Sa) of both Ba4Y3F17: Pr3+(0.1 mol %) and Ba4Y3F17: Pr3+(0.1 mol.%): Yb3+(10.0 mol.%)nanothermometers based on luminescence intensity ratio (LIR) between two Pr3+ emission bands (3P1-3H5 and 3P0-3H5) demonstrate a notable value (0.011 K−1 at 300 K) in the 200–320 K range. The Ba4Y3F17: Pr3+(0.1 mol.%): Yb3+(10.0 mol.%)nanothermometers based on LIR between 3P0→3H4 of Pr3+ and 2F5/2→ 2F7/2 of Yb3+ emission bands demonstrate high Sa into the 80–200 K range with maximal Sa = 0,0778 K−1 at 100 K. The stability of the phosphors was revealed by thermo-cycling experiments

Heat shock-induced cadaverine accumulation and translocation throughout the plant

To test the possibility of heat shock (HS)-induced cadaverine accumulation and translocation throughout the plant, the titres of free polyamines in different plant organs, xylem and phloem exudates of the common ice plant (Mesembryanthemum crystallinum L.) were studied. Cadaverine level was relatively low in young leaves and apexes, while this diamine occurred in roots and stems at higher concentrations (20-29 nmol g-1 FW). The level of spermidine (60-300 nmol g-1 FW) in plants grown under normal conditions (23-25 °C, 55% RH, 14 h photoperiod) was 10-fold higher than the levels of all other polyamines (6-25 nmol g-1 FW). The plants responded to HS with a change in polyamine balance, as well as with a fast and transient increase in ethylene evolution. Local heating of plant aerial parts (47 °C, 2 h, 100% RH) primarily induced the accumulation of cadaverine and, to a lesser extent, putrescine and spermidine in roots and an increase in cadaverine concentration in the phloem exudate. The HS treatment of the root system resulted in accumulation of cadaverine in plant stems and in the xylem exudate. In contrast, spermine was not able for the long distance transport and stress induced accumulation. Exposure of detached leaves to exogenous ethylene (1-10 μ1 1-1, 4 h) was accompanied by accumulation of cadaverine. Arabidopsis wild type (Col-0) plants contained cadaverine in leaves and roots. In contrast, this diamine was not found in roots of ethylene- insensitive mutant strain (ein4) and accumulated only under HS treatment (45 °C, 1 h). These findings demonstrate ethylene dependent inter-organ translocation of cadaverine, as well as the possible involvement of ethylene in regulation of cadaverine level in plants under stress. © 2001 Elsevier Science Ireland Ltd. All rights reserved

Heat shock-induced cadaverine accumulation and translocation throughout the plant

To test the possibility of heat shock (HS)-induced cadaverine accumulation and translocation throughout the plant, the titres of free polyamines in different plant organs, xylem and phloem exudates of the common ice plant (Mesembryanthemum crystallinum L.) were studied. Cadaverine level was relatively low in young leaves and apexes, while this diamine occurred in roots and stems at higher concentrations (20-29 nmol g-1 FW). The level of spermidine (60-300 nmol g-1 FW) in plants grown under normal conditions (23-25 °C, 55% RH, 14 h photoperiod) was 10-fold higher than the levels of all other polyamines (6-25 nmol g-1 FW). The plants responded to HS with a change in polyamine balance, as well as with a fast and transient increase in ethylene evolution. Local heating of plant aerial parts (47 °C, 2 h, 100% RH) primarily induced the accumulation of cadaverine and, to a lesser extent, putrescine and spermidine in roots and an increase in cadaverine concentration in the phloem exudate. The HS treatment of the root system resulted in accumulation of cadaverine in plant stems and in the xylem exudate. In contrast, spermine was not able for the long distance transport and stress induced accumulation. Exposure of detached leaves to exogenous ethylene (1-10 μ1 1-1, 4 h) was accompanied by accumulation of cadaverine. Arabidopsis wild type (Col-0) plants contained cadaverine in leaves and roots. In contrast, this diamine was not found in roots of ethylene- insensitive mutant strain (ein4) and accumulated only under HS treatment (45 °C, 1 h). These findings demonstrate ethylene dependent inter-organ translocation of cadaverine, as well as the possible involvement of ethylene in regulation of cadaverine level in plants under stress. © 2001 Elsevier Science Ireland Ltd. All rights reserved

FIRST RADIOCARBON RESULTS OF ONEGA LAKE BOTTOM SEDIMENTS BASED ON CONVENTIONAL AND AMS METHODS

48-5

Application of cold plasma to control the microbiota composition on the surface of potato tubers

A study of the effect of low-temperature plasma on potato tubers was carried out. A comparative assessment of changes in the rate of germination, the size of shoots and the mass of shoots was carried out. Changes in the number of bacteria and fungi on the surface of tubers were analysed for different durations of exposure. It was found that growth characteristics did not change. The number of bacteria on the surface of tubers was significantly reduced due to the exposure to low-temperature plasma. © The Authors, published by EDP Sciences, 2021