The paper presents results of exposure normal concrete to elevated temperatures (400 and 700) °C covered by layers (gypsum plaster) with different thicknesses (10 20) mm. casted specimens for each type test were divided into three groups. first was without covering the surface gypsum, while second third groups gypsum outer a thickness 10 20 mm, respectively. experimental found that ultimate loa...

We report a novel system to analyze atmospheric nitrophenols (NPs). Rain or air sample extracts (1 mL) are preconcentrated on a narrow bore (2 mm) aliphatic anion exchanger. In the absence of strong retention of NPs exhibited by aromatic ion exchangers, retained NPs are eluted as a plug by injection of 100 microL of 0.1 M Na(2)SO(4) on to a short (2 x 50 mm) reverse phase C-18 column packed wit...

The stoichiometry and voltage dependence of the Na/K pump were studied in internally dialyzed, voltage-clamped squid giant axons by simultaneously measuring, at various membrane potentials, the changes in Na efflux (delta phi Na) and holding current (delta I) induced by dihydrodigitoxigenin (H2DTG). H2DTG stops the Na/K pump without directly affecting other current pathways: (a) it causes no de...

Abstract The feasibility of an underground LoRaWAN bushfire temperature sensing node from the point view survivability in a event is considered. Thermal penetration into soil modelled using one-dimensional analytical formulation for semi-infinite solid. A working prototype sensor unit was tested experimentally beneath relatively small (400 mm × 400 base) timber fire. buried LoRa radio (depth 10...

It is challenging to assure safe and effective gas mining due the surrounding soft coal rock roads in deep high mines being extremely loose broken. One of ways arrange pre-stressed anchors a certain area roadway rocks form compression arch with joint action rocks, but lack in-depth systematic research on formation mechanism arch, effect difficult give full play. The typical microstructure was o...

This study aims to analyze antennas' characteristics at a frequency of 2.2 GHz, including the value return loss, VSWR, gain, bandwidth, surface current, and radiation pattern. The antenna have been designed using simulations made with FR-4 substrates dielectric constant ε_r= 4.3 substrate thickness (h) = 1.6 mm copper patches patch 0.035 mm. Single antennas are first get desired parameters, the...

The role of kinins in the acute antihypertensive effect of a converting enzyme inhibitor (CEI) was studied in sodium-depleted normotensive and in two-kidney, one clip chronically hypertensive rats (2K-1C). The 2K-1C were on a normal sodium diet. The acute vasodepressor effect of the CEI was determined in these two groups either after administration of normal rabbit globulins or antikinin globul...