A Comparative Experimental Study of Glass Stability in Seawater and Distilled Water

1987 ◽  
Vol 112 ◽  
Author(s):  
Zhihong Zhou ◽  
W. S. Fyfe
Keyword(s):  
Experimental Study ◽  
Corrosion Test ◽  
Salt Content ◽  
Deionized Water ◽  
Distilled Water ◽  
Total Weight Loss ◽  
Leaching Tests ◽  
Surface Layers ◽  
Glass Stability ◽  
High Salt Content

AbstractBoth PNL76−68 and ABS-118 glasses show greater stability in seawater (SW) than in distilled and deionized water (DDW), in the MCC-1 90°C corrosion test. After 180 days of corrosion, the boron release from PNL76- 68 and ABS-118 glasses is about five and two times lower respectively in SW than in DDW. Seawater leachates show less increase in pH than DDW leachates. Glass corroded in SW shows little or no total weight loss. Significant amounts of Mg from SW have been added to the surface layers of both types of glass. Mg-silicates were found in surface layers formed in SW, whereas Zn- and Fe-silicates in surface layers formed in DDW. Shortterm leaching tests in D2O, NaCl and MgCl2 solutions suggested that high salt content in leachant can impede glass hydration. Both silica saturation and Mg diffusion may be responsible for greater stability of the glasses in SW than in DDW.

scholarly journals SUBSTANTIATION OF CHOICE OF VEGETABLE CROPS SUITABLE FOR GROWING ON SALTED SOILS

2020 ◽  
Vol 5 (4(73)) ◽  
pp. 12-18
Author(s):  
G.T. Bekmirzaev ◽  
I.A. Begmatov ◽  
D.B. Yulchiev
Keyword(s):  
Experimental Study ◽  
New Zealand ◽  
Salt Content ◽  
Vegetable Crops ◽  
Agricultural Systems ◽  
Salt Tolerant ◽  
As Species ◽  
High Salt Content ◽  
The University ◽  
Selection Of

The purpose of the experimental study was the selection of salt tolerant crops and the search for useful horticultural species for growing them on saline lands. The experimental study was conducted at the University of Algarve, Portugal, in a greenhouse. The following vegetable crops were selected for research: lettuce (Lactuca sativaL), New Zealand spinach (Tetragonia tetragonioides) and garden purslane (Portulaca oleracea). Experimental results showed that New Zealand spinach and garden purslane have high potential as species resistant to high salt content and are therefore recommended for cultivation in order to reduce soil salinity. The above crops, mainly New Zealandspinach, are good types of garden crops with high useful qualities and productivity. Therefore, it has been shown that this method is a clean and environmentally friendly tool to prevent salinization and maintain the sustainability of agricultural systems

Effect of Sodium Nitrite on Growth of Shigella flexneri

1991 ◽  
Vol 54 (6) ◽  
pp. 424-428 ◽  
Author(s):  
LAURA L. ZAIKA ◽  
ANNA H. KIM ◽  
LOUISE FORD
Keyword(s):  
Exponential Growth ◽  
Shigella Flexneri ◽  
Salt Content ◽  
Brain Heart Infusion ◽  
Growth Curves ◽  
Inhibitory Effect ◽  
Plate Count ◽  
Generation Times ◽  
High Salt Content ◽  
Lag Times

A partial factorial design study of the effect of NaNO2 (0, 100, 200, 1000 ppm) in combination with NaCl (0.5, 2.5, 4.0%), pH (7.5, 6.5, 5.5), and temperature (37, 28, 19°C) on growth of Shigella flexneri is reported. Experiments were done aerobically in brain-heart infusion medium, using an inoculum of 1 × 103 CFU/ml. Growth curves were fitted from plate count data by the Gompertz equation; exponential growth rates, lag times, generation times, and maximum populations were derived for all variable combinations. In the absence of nitrite, the organism grew well under all test conditions at 37 and 28°C but did not grow at 19°C at pH 5.5 nor at pH 7.5 with 4% NaCl. Nitrite did not affect growth in media of pH 7.5 at 37 and 28°C. At pH 6.5 growth was inhibited by 1000 ppm NaNO2. The organism failed to grow at 19°C at all nitrite levels in the presence of 2.5 or 4.0% NaCl. The inhibitory effect of nitrite was much greater in media of pH 5.5 and increased with increasing salt levels. More inhibition was apparent at 28 than at 37°C. While lack of growth was used as a paradigm of the effect of nitrite on S. flexneri, nitrite also increased the lag and generation times and decreased the exponential growth rate. Results indicated that NaNO2 in combinations with low temperature, low pH, and high salt content can effectively inhibit the growth of S. flexneri.

Resource-saving Technologies and Some Proposals for the Creation of Automated Reclamation Systems

2021 ◽  
Vol 25 (7) ◽  
pp. 8-12
Author(s):  
Z.G. Lamerdonov ◽  
T.Yu. Khashirova ◽  
S.A. Zhaboev ◽  
L.Zh. Nastueva ◽  
A.А. Shogenov ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Salt Content ◽  
Experimental Studies ◽  
Soil Surface ◽  
Growing Season ◽  
Resource Saving ◽  
Water Savings ◽  
Irrigation Method ◽  
High Salt Content ◽  
Reclamation System

The results of experimental studies of the local subsurface irrigation method in comparison with drip irrigation carried out in the laboratory, which showed water savings due to a decrease in evaporation from the soil surface by 10–15 percent are presented. The method of irrigation in closed greenhouse farms using water with a high salt content is described. The paper proposes new patented schematic solutions for protecting plants from frost and pests, describes a multifunctional engineering and reclamation system capable of performing various operations depending on the emerging problems during the growing season.

scholarly journals Experimental Study of Deformed States of Carbon Plastics Surface Layers in Axial Tension by Digital Images Correlation Method

2018 ◽  
pp. 58 ◽  
Author(s):  
А.М. Устинов ◽  
А.А. Клопотов ◽  
А.И. Потекаев ◽  
Ю.А. Абзаев ◽  
В.С. Плевков
Keyword(s):  
Experimental Study ◽  
Digital Images ◽  
Correlation Method ◽  
Surface Layers ◽  
Axial Tension ◽  
Carbon Plastics
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