temperature ranges
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mSystems ◽  
2022 ◽  
Trinity L. Hamilton ◽  
Jeff Havig

Hot spring cyanobacteria have long been model systems for examining ecological diversification as well as characterizing microbial adaptation and evolution to extreme environments. These studies have reported cyanobacterial diversification in hot spring outflow channels that can be defined by distinct temperature ranges.

2022 ◽  
Vol 26 (1) ◽  
pp. 36-42
Ali A. Hasan ◽  
Ali F. Hassoon ◽  
Aisha A. Ahmed ◽  

In this research the membranes distillation were used to remove calcium ions from heavy sewers at dairy plants in Iraq. This method is easy to operate, easy to manage and has many economic benefits. A chemical treatment was carried out on it using alum as a coagulant, different tests achieved samples before and after passing MD, according to APHA, AWWA, WEF. The results showed that obtained in water treatment trust that has been manufactured and edited according to the characteristics of the water waste the interests of the dairy capacity of this method to remove the calcium ion to a certain extent it is when the concentration reaches the inside of this ion to 1428.57 mg per liter, where to start the composition of hydroxides of calcium responsible for pain. The optimal working temperature ranges from 20-22 ° C and the flow is around 0.66 kg.m-2.h-1, here was the result of a layer of plaster that led to clogged membrane and folding and was stopped for washing and cleaning.

En-Hui Yuan ◽  
Meng Li ◽  
Ming-Hui Yang ◽  
Xiaosheng Huang ◽  
Kun Zhang ◽  

Instruments ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 1
Andrea Alimenti ◽  
Kostiantyn Torokhtii ◽  
Daniele Di Gioacchino ◽  
Claudio Gatti ◽  
Enrico Silva ◽  

Axions, hypothetical particles theorised to solve the strong CP problem, are presently being considered as strong candidates for cold dark matter constituents. The signal power of resonant-based axion detectors, known as haloscopes, is directly proportional to their quality factor Q. In this paper, the impact of the use of superconductors on the performances of haloscopes is studied by evaluating the obtainable Q. In particular, the surface resistance Rs of NbTi, Nb3Sn, YBa2Cu3O7−δ, and FeSe0.5Te0.5 is computed in the frequency, magnetic field, and temperature ranges of interest, starting from the measured vortex motion complex resistivity and the screening lengths of these materials. From Rs, the quality factor Q of a cylindrical haloscope with copper conical bases and a superconductive lateral wall, operating with the TM010 mode, is evaluated and used to perform a comparison of the performances of the different materials. Both YBa2Cu3O7−δ and FeSe0.5Te0.5 are shown to improve the measurement sensitivity by almost an order of magnitude, with respect to a whole Cu cavity, while NbTi is shown to be suitable only at lower frequencies (<10 GHz). Nb3Sn can provide an intermediate improvement of the whole spectrum of interest.

2021 ◽  
Vol 37 (6) ◽  
pp. 1359-1365
Adjo Cynthia Kouakou ◽  
Agbékonyi Kokou Agbodan ◽  
Kwami Lumo Awaga ◽  
Awèdéou Bakpo ◽  
Eyawèdeou Yelegue ◽  

Tchoukoutou is a local alcoholic drink made from sorghum. The optimization and good quality of this drink depend on certain factors such as temperature that were the subject of our work. To carry out this study, we have set ourselves the general objective of structuring the production of Tchoukoutou. Specifically, the study aims to systematize the cooking of the wort, to verify the properties of the beer through tests and to produce a quality drink. An investigation was made on the influence of temperature on sorghum germination and wort cooking. The study of the effect of temperature on the germination of sorghum was carried out. It concerned four different temperature levels which are: 23 ° C, 26 ° C, 30 ° C and 35 ° C. A study of the influence of temperature on brewing was done with different varieties of sorghum and also at different temperature ranges: 78 ° C, 83 ° C, 89 ° C, and 92 ° C. The results showed that the ideal germination temperature is 30 ° C and for brewing it is 78 ° C. The soaking time during germination, for a good germination rate, is between 16h and 26h. In conclusion, the temperature factor is a parameter that should not be overlooked when making Tchoukoutou. Our study thus made will serve as a basis for subsequent studies in the same direction to achieve a standardized industrial production of Tchoukoutou.

2021 ◽  
Vol 37 (6) ◽  
pp. 1302-1306
Asim Muhammed Alshanberi ◽  
Shakeel Ahmed Ansari

The present study demonstrates the application of freshly prepared neem leaf extract as a reducing agent for synthesizing magnesium oxide nanoparticles (MgO-NPs). In silico interaction of Aspergillus oryzae β-galactosidase with MgO-NPs was observed by using molecular docking program Dock v.6.5 while the visual analyses and illustration of protein–ligand complex were investigated by utilizing chimera v.1.6.2 and PyMOL v.1.3 softwares. The prepared nanomatrix provided 83% immobilization yield, and broadened the biocatalytic activity of immobilized β-galactosidase at higher pH and temperature ranges. Immobilized β-galactosidase exhibited greater activity even at 5.0% galactose concentration as compared to the soluble enzyme under similar experimental conditions. Hence, the use of green nanotechnology makes the process inexpensive, and therefore, immobilization of these enzymes on such nanoparticles can help to recover the enzyme, which ultimately decreases the cost of process.

2021 ◽  
Vol 42 (4) ◽  
pp. 357-360
H. P. DAS ◽  

Utilising experimental data from 23 November to 8.December 1989. temperature and heat storage variations at Pune have been studied, based on 3 hourly observations.. pattern of penetration of .thermal wave within the soil has been examined and time of occurrence of maximum/minimum temperatures discussed for various depths. Temperature ranges in different layers have been theoretically computed and compared with those based on actual observations. Heat balance at various depths has also been presented and discussed.

2021 ◽  
pp. 1-9
Khushi Muhammad ◽  
Sharon Riaz ◽  
André A. Vieira ◽  
Eunice C. de Jesus ◽  
Itamar Gonçalves ◽  

2021 ◽  
Vol 12 (1) ◽  
pp. 156
Huifang Liu ◽  
Peijia Li ◽  
Bendong Yu ◽  
Mingyi Zhang ◽  
Qianli Tan ◽  

A combined solar chimney is proposed in this paper that integrates an inclined-roof solar chimney with a traditional Trombe wall. The ventilation performance of the combined solar chimney is analyzed numerically and then compared with the Trombe wall and the inclined-roof solar chimney. The feasibility of different operation modes and the ventilation effect under different environment conditions are also discussed. The results show that when the ambient temperature ranges from 298 to 303 K in the summer, a natural ventilation mode is appropriate. Otherwise, an anti-overheating mode is recommended. When the ambient temperature is lower than 273 K in the winter, a space heating mode has a better heating effect. A preheating mode can be employed to improve the indoor air quality when the ambient temperature is higher than 278 K. The simulation results indicates that the ventilation effect of the combined solar chimney is better than that of the Trombe wall and the inclined-roof solar chimney, and the problem of overheating can be avoided. The study provides guidance for the optimal operation of a combined solar chimney.

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 65
Barbara Nasiłowska ◽  
Zdzisław Bogdanowicz ◽  
Paweł Bogusz ◽  
Aneta Bombalska ◽  
Zygmunt Mierczyk

This paper presents the effect of deposited graphene oxide coating on fatigue life of austenitic steel 1.4541 at 20 °C, 100 °C, and 200 °C. The study showed a decrease in the fatigue life of samples with a deposited graphene oxide layer in comparison with reference samples at 20 °C and 100 °C. However, an increase in fatigue life of samples with a deposited graphene oxide layer in comparison with reference samples occurred at 200 °C. This relationship was observed for the nominal stress amplitude of 370 and 420 MPa. Measurements of temperature during the tensile failure of the sample and microfractographic analysis of fatigue fractures were performed. Tests have shown that graphene oxide deposited on the steel surface provides an insulating layer. A higher temperature of the samples with a deposited graphene oxide layer was observed during fracture compared to the reference samples.

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