scholarly journals Peculiarities of a glass-sludge mixture subjected to low-temperature treatment

2017 ◽  
Vol 49 (3) ◽  
pp. 207-224 ◽  
Author(s):  
Parra Parra ◽  
Marina Vlasova ◽  
Aguilar Márquez ◽  
Tamara Tomila
Keyword(s):  
Aqueous Solution ◽  
Low Temperature ◽  
Temperature Treatment ◽  
Adsorption Properties ◽  
Glass Shell ◽  
Short Term ◽  
Active Sludge ◽  
Low Temperature Treatment ◽  
Treatment Conditions ◽  
Sewage Purification

In this work, the specific features of formation of a composite material consisting of a mixture of low-melting ground glass and waste active sludge, which is used for sewage purification, have been considered. It has been established that, after low-temperature (600-700?C) short-term (30-60 min) treatment, specimens consist of a porous glass shell and a core saturated by carbon form. With change in temperature treatment conditions, the thickness and porosity of the shell and the size of the carbonized core change, leading to different absorption and adsorption properties. Due to the presence of a carbon-containing core, specimens absorb efficiently methylene blue (MB) from aqueous solution.

Effects of short-term temperature fluctuations on leaf photosynthesis in corn (Zea mays)

1979 ◽  
Vol 57 (21) ◽  
pp. 2387-2393 ◽  
Author(s):  
M. R. Thiagarajah ◽  
L. A. Hunt ◽  
R. B. Hunter
Keyword(s):  
Zea Mays ◽  
Low Temperature ◽  
Temperature Stability ◽  
Temperature Fluctuations ◽  
Complete Recovery ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Genotypic Differences ◽  
Short Term ◽  
Low Temperature Treatment

The effects of short-term temperature fluctuations on net photosynthetic rates (Pn) are described for a single-cross corn (Zea mays L.) hybrid (Harrow 691). The hybrid was grown at 25 °C and subjected to 4 days at either 15 or35 °C, and then maintained at 25 °C. Genotypic differences in tolerance of Pn to low temperature were studied using 12 hybrids of different maturities grown at 25 °C and subjected to 4 days at 15 °C.Following low temperature treatment. Pn was initially reduced by about 15% for leaves 5. 9. and 13 of hybrid Harrow 691. but completely recovered after 1 day at 25 °C. Following high temperature treatment, leaves 5 and 9 showed similar reductions in Pn whereas leaf 13 was not affected. The photosynthetic activity of the heat-stressed leaf 9 recovered after 1 day, but that of leaf 5 showed no recovery for 14 days at 25 °C.Among 12 hybrids. Pn of the newly matured leaf 7 was reduced after the low temperature treatment, but the reduction was more drastic for two late hybrids than for three early hybrids. Most hybrids showed complete recovery of Pn after 1 day at 25 °C. but genotypic differences were evident. The results reported indicate that further evaluation of the amount of genetic variation in temperature stability in corn could be carried out usefully.

Studies on Freshwater Osmoregulation in the Ammocoete larva of Lampetra Planeri (Bloch)

1968 ◽  
Vol 48 (3) ◽  
pp. 597-609
Author(s):  
R. MORRIS ◽  
J. M. BULL
Keyword(s):  
Low Temperature ◽  
Extracellular Space ◽  
Ringer Solution ◽  
Temperature Treatment ◽  
Sodium Influx ◽  
Sodium Chloride Solutions ◽  
Low Temperature Treatment ◽  
Lampetra Planeri ◽  
Equilibrium Concentrations ◽  
Sodium Loss

1. An investigation has been made of the factors which cause sodium loss from ammocoetes when they are immersed in de-ionized water at 1° and 10° C. 2. Sodium influx ceases when animals are first immersed in de-ionized water, but can recommence when the animal loses sufficient sodium to the environment. The concentration of sodium required for influx to take place decreases with succeeding periods of immersion in de-ionized water at 10° C. and reaches minimum equilibrium concentrations as low as 0.005 mM-Na/l. 3. Low temperature inhibits sodium influx and thus promotes net loss of sodium to de-ionized water. 4. Low temperature also decreases the initial loss of sodium to de-ionized water and probably lowers the permeability of the external surfaces of the animal to ions. This effect is small compared with the inhibition of ion uptake so that the combined result is to increase the net loss of sodium from the animal. 5. Since animals lose calcium to de-ionized water and show a decreased rate of sodium loss when calcium salts are added, it is believed that the high rates of sodium loss in de-ionized water are attributable to the effect of calcium on permeability. 6. Lack of calcium may also explain why animals which have been depleted of sodium by low-temperature treatment take up sodium much faster at higher temperatures from dilute Ringer solutions than from pure sodium chloride solutions. 7. When animals lose ions to de-ionized water at low temperature, sodium and chloride are lost from the extracellular space, whilst the muscle cells lose potassium. These ions are recovered into the extracellular space when animals are allowed to take up ions at 10° C. from diluted Ringer solution later.

scholarly journals Development of technology of preparation of pork semi-products with the application of low-temperature treatment

2019 ◽  
Vol 81 (2) ◽  
pp. 250-256
Author(s):  
M. F. Khairullin ◽  
E. A. Koval ◽  
I. Y. Levitskaya ◽  
M. G. Gadjiev ◽  
B. A. Sultonov
Keyword(s):  
Low Temperature ◽  
Temperature Treatment ◽  
Production Costs ◽  
Meat Industry ◽  
Pork Products ◽  
Low Temperature Treatment ◽  
Organoleptic Characteristics ◽  
Microbiological Characteristics ◽  
Manufactured Products ◽  
Low Temperature Processing

The study was aimed at developing a technology for preparing various semi-finished products from pork meat using low-temperature processing "Su-Vid". The main physicochemical indicators, functional-technological and structural-mechanical characteristics of semi-finished products, the chemical composition of semi-finished products and finished products were identified and determined experimentally, and organoleptic analysis was carried out. The data indicate that the use of low-temperature processing significantly affects the characteristics of manufactured products, which improves its performance. In particular, pork semi-finished products prepared at low temperatures are characterized by the yield: steak – 93.9%, ribs – 92.6%, in comparison with the control regime, 7.5 and 6.2% higher. The complex of data obtained showed that the samples of semi-finished pork, according to the experimental regimes of heat treatment, in terms of safety, fully meet the requirements of TR TS 034/2013. Analysis of semi-finished pork products showed that products prepared using the Su-Vid technology had high organoleptic characteristics, taste and sensory characteristics. During the storage of semi-finished products, minor changes in proteins and fats, as well as organoleptic, sanitary and microbiological characteristics, took place. As a result, a bone steak was developed in the Caucasian marinade and pork ribs in the Monte Ritz marinade made using the Su-Vid technology. The results allow us to judge that this technology is quite promising and has a positive effect on the characteristics of manufactured products. The widespread introduction of this technology in the meat industry will allow the development of semi-finished products and products of high quality, nutritional and biological value compared to products manufactured by traditional methods, as well as reduce production costs.

scholarly journals LEVELS OF HORMONES TRIIODOTHYRONINE AND PLASMA BLOOD GLUCOSE BROILER STARTER DUE TO HEAT STRESS AND PRELIMINARY DIFFERENCE FEEDING TIME

2018 ◽  
Vol 6 (1) ◽  
pp. 421-427
Author(s):  
Liborio Ximenes ◽  
Pratiwi Trisunuwati ◽  
Muharlien
Keyword(s):  
Heat Stress ◽  
Blood Glucose ◽  
High Temperature ◽  
Low Temperature ◽  
Block Design ◽  
Temperature Treatment ◽  
Initial Time ◽  
Feeding Time ◽  
Glucose Levels ◽  
Low Temperature Treatment

The study was conducted to know blood glucose and triiodothyronine levels of broiler starter due to heat stress and different initial-time feeding. The material used in this study was 64 male DOC broilers of Lohmann strain with the average initial weight of 47.98 ± 2.24 g. The experiment was designed based on randomized block design with a 2x2 factorial and four replications. The treatment combinations as follow: S1W1 = low temperature, feeding 12 hours post-hatching; S1W2 = low temperature, feeding 24 hours post-hatching; S2W1 = high temperature, feeding 12 hours post-hatching; S2W2 = high temperature, feeding 24 hours post-hatching. The Data were Analyzed by using ANOVA. If there was a significant effect (P <0.05) or very significant effect (P <0.01) in Followed by Duncan's test. The result Showed that heat stress treatment significantly affected (P <0.05) to the triiodothyronine level, while initial feeding treatment had no significant effect. Also, blood glucose levels had no significant effect due to the treatments. It concluded that heat stress negatively affected by the blood glucose and triiodothyronine levels of broiler starter. The initial-time feeding has no effect on the blood glucose and triiodothyronine levels. Interactions between treatment and different temperature-time initial feeding have no effect. Nevertheless, the low temperature treatment and initial feeding of 12 hours post-hatching shows the best results with blood glucose 246.25 ± 9.91 mg / dl and triiodothyronine of 2.05 ± 0.14 ng / ml.

Sign in / Sign up

Export Citation Format

Share Document