Studies on the periodicity of chlorophyceae of Jait Sagar lake, Bundi (Rajasthan)

2015 ◽  
Vol 4 (5) ◽  
pp. 232-239
Author(s):  
Dilip Kumar Rathore ◽  
Preeti Sharma ◽  
Harsh Kumar Sumeria
Keyword(s):  
High Temperature ◽  
Rapid Development ◽  
Summer Season ◽  
Algal Population

  The Chlorophyceae periodicity of Jait Sagar lake had been studied during Jan 2013 to Dec 2013. A total number of 44 species belonging to 15 genera of Chlorophyceae class were identified. Some of common genera belonging to Chlorophyceae of Jait Sagar lake were Pediastrum, Scenedesmus, Cosmari-um, Spirogyra, Closterium etc. The occurrence of algae varied in different study areas in various months. Scenedesmus showed a maximum popula-tion. Some species were common to all the seasons while others were repre-sented only at a particular season. The algal population was found to be maximum in summer season and the lowest in winter. Water becomes greenish due to population of Microalgae such as Pediastrum, Scenedesmus, Cosmarium and Closterium during May-October. Seasonal successions of phytoplankton are affected by strong seasonal ecological influences. In the present investigation it was observed that high temperature and pH were favourable for rapid development of Chlorophyceae.

Studies on compatibility of nitrogen fixation by high-temperature-adapted Rhizobium strains and Vigna radiata genotypes at two moisture levels in calcareous soil

1983 ◽  
Vol 101 (2) ◽  
pp. 377-381 ◽  
Author(s):  
R. Rai ◽  
V. Prasad
Keyword(s):  
Nitrogen Fixation ◽  
High Temperature ◽  
Grain Yield ◽  
Vigna Radiata ◽  
Calcareous Soil ◽  
Nitrogenase Activity ◽  
Summer Season ◽  
Green Gram ◽  
Rhizobium Strains

SUMMARYRhizobium strains adapted to high temperature, and genotypes of green gram, were used to study the symbiotic N2-fixation in a summer season at two moisture levels in calcareous soil. Different interactions between strains and genotypes were observedatthe two moisture levels. At both moisture levels, strain S4 with the green gram genotype S8 showed the greatest grain yield, nitrogenase activity, leghaemoglobin and ethanolsoluble carbohydrate of nodules.

An application of high-temperature superconductors YBCO to magnetic separation

2017 ◽  
Vol 31 (25) ◽  
pp. 1745001 ◽  
Author(s):  
Qiudong Guo ◽  
Peng Zhang ◽  
Lin Bo ◽  
Guibin Zeng ◽  
Dengqian Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Magnetic Separation ◽  
High Magnetic Field ◽  
Low Cost ◽  
Rapid Development ◽  
High Temperature Superconductors ◽  
New Approach ◽  
Industrial Areas ◽  
Ybco Tape

With the rapid development of manufacturing technology of high temperature superconductive YB[Formula: see text]Cu3O[Formula: see text] YBCO materials and decreasing in cost of production, YBCO is marching into industrial areas with its good performances as source of high-magnetic field and rather low cost in reaching superconductivity. Based on analysis of the performance of high temperature superconductors YBCO and development of technology in superconductive magnetic separation both home and abroad, we propose a new approach of taking YBCO tape to make a solenoid as the source of a high magnetic field of magnetic separatior of ores. The paper also looks into the future of the YBCO high temperature superconductive magnetic separation from the perspective of technology and cost, as well as its applications in other industries.

Synthesis and Characterization Performance of a Novel High Temperature Retarder Applied in Long Cementing Interval

2016 ◽  
Vol 847 ◽  
pp. 479-484 ◽  
Author(s):  
Ya Lu ◽  
Ming Li ◽  
Zi Han Guo ◽  
Xiao Yang Guo
Keyword(s):  
Thermal Stability ◽  
Compressive Strength ◽  
High Temperature ◽  
Temperature Difference ◽  
Ph Value ◽  
Rapid Development ◽  
Large Temperature ◽  
Gravimetric Analysis ◽  
Sedimentation Stability ◽  
Large Temperature Difference

In view of the common polymer retarder of AMPS has poor sedimentation stability for slurry in high temperature, and thickening curve for unusual problems, a new terpolymers retarder PSIH which can solve the problem for the large temperature difference was synthesized by free radical aqueous solution copolymerization using styrene sulfonate (SSS), Itaconic acid (IA) and unsaturated hydroxyl ester monomers X . The structure and thermal stability of the copolymer was characterized with gel permeation chromatography (GPC), infrared spectroscopy (IR), and thermal gravimetric analysis (TG). The application performance of the retarder was assessed. The results demonstrated as follows. 1) The preferred synthesis conditions of the retarder is: the mass ratio of SSS/IA/X=9: 3: 1, temperature=60°C, initiator concentration =2%, the reaction time=5h, pH value was controlled in the neutral bias acidity. 2) Synthetic copolymer is the target product with appropriate molecular weight and has good thermal stability with thermal decomposition temperature of the main chain up to 375°C. 3) Compared with ordinary retarder the PSIH has merits as follows: excellent thermal resistant ability and sedimentation stability in high temperature; the rapid development of compressive strength in low temperature, and a big temperature span (30 °C~150 °C). The thickening time of the slurry with 1.0% PSIH is 245 min at 150°C; the compressive strength of cement with the same dosage can get up to 4.7MPa at 30 °C. In short, PSIH has excellent ability to cope with large temperature difference, providing a strong technical support for complex deep well cementing.

scholarly journals MONITORING OF DRINKING WATER RESERVOIRS OF KOPARGAON CITY WITH SPECIAL REFERENCE TO ALGAL FLORA AT YESGAON, DIST. AHMEDHNAGAR MAHARASHTRA (M.S.), INDIA

2020 ◽  
Vol 8 (9) ◽  
pp. 16-21
Author(s):  
R. R. Sanap ◽  
B. P. Shevare ◽  
M. M. Barwant
Keyword(s):  
Drinking Water ◽  
Monsoon Season ◽  
Water Storage ◽  
Summer Season ◽  
Algal Flora ◽  
Storage Tanks ◽  
Algal Population ◽  
Dominant Group ◽  
Storage Reservoirs ◽  
Investigation Period

Algal collection from 5 drinking water storage reservoirs of Kopargaon city was carried out for one year. A total 39 genera and 62 species belonging to four classes were encountered during investigation period. Present studies revealed that, algal population was not found homogenous throughout the year, but it showed seasonal variation. During monsoon the algal population recorded was less, which increases in winter and found more in summer season. Chlorophyceae was found to be the dominant group throughout the investigation period in all storage tanks consisting of large number of genera and species. Many planktonic, some benthic and epiphytic algae were encountered during investigation period at all five water storage reservoirs. The commonly occurred genera were Ankistrodesmus, Closterium, Cosmarium, Spirogyra, Ulothrix from class Chlorophyceae, while from Cyanophyceae, Merismopedia, Microcystis, Oscillatoria, and Lyngbya are dominating forms. Desmids wear found in dominant condition in all storage tanks indicating unpolluted condition of water. Maximum population of Cosmarium was recorded during summer season, while Closterium species were recorded throughout the year. Other genera recorded were Staurastrum, Xanthidium, Euastrum, Micrasterias, Arthrodesmus, Desmidium, etc.  Diatoms were recorded more in number during winter, while Euglenophycean members were sparsely reported only in summer. During present studies tremendous variations in Desmid diversity was noticed during summer and winter as compared to monsoon season.

scholarly journals Assessment on Damage Risk of Corn for High Temperature at Reproductive Stage in Summer Season Based on Climate Scenario RCP 8.5 and 4.5

2017 ◽  
Vol 50 (1) ◽  
pp. 1-11
Author(s):  
Myung-Chul Seo ◽  
Hyeon-Suk Cho ◽  
Jun-Hwan Kim ◽  
Wan-Gyu Sang ◽  
Pyeong Shin ◽  
...  
Keyword(s):  
High Temperature ◽  
Climate Scenario ◽  
Summer Season ◽  
Reproductive Stage ◽  
Rcp 8.5 ◽  
Damage Risk

Characterising scale-breakdown mechanisms during high-temperature oxidation using EM

1990 ◽  
Vol 48 (4) ◽  
pp. 878-879
Author(s):  
P .N. Rowley ◽  
R. Brydson ◽  
J. A. Little ◽  
S. R. J. Saunders
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Rapid Development ◽  
Major Effect ◽  
Oxidation Behaviour ◽  
Metal Interface ◽  
Temperature Oxidation ◽  
High Temperature Steam ◽  
Fissure Formation ◽  
Insight Into

The microstructure and chemical composition of oxide films formed during the initial stages of high temperature oxidation have long been recognised as having a major effect on subsequent scaling behaviour. For example, the development of thick (>lμm) duplex scales on Fe-Cr alloys is assumed to occur via a mechanism of pore and fissure formation in the initial oxide (Atkinson, Tomlinson and Cory.) However, this process has rarely been observed using electron microscopy.The investigation of the oxidation behaviour of Fe-9Cr alloys in high temperature steam gives an insight into these scale breakdown processes. Within 3 minutes of the onset of oxidation, significant breakdown of the initially formed thin film occurs due to the development of readily visible fissures and pores at oxide grain boundaries (figure 1). This leads to the ready ingress of oxidant and the rapid development of a thick duplex Fe3O4/(Fe,Cr)3O4 oxide with a thin outer layer of α-Fe2O3 (figure 2). The extremely porous nature of this scale allows further inward diffusion of molecular oxidant, thereby instituting the continued growth of (Fe,Cr)3O4 at the scale/metal interface.

Production and evaluation of activated carbon from palm kernel shells

2019 ◽  
Author(s):  
Chandra Shekar Pandey
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
General Population ◽  
National Economy ◽  
Rapid Development ◽  
Palm Kernel ◽  
Water Bodies ◽  
Initial Stage ◽  
Petroleum Derivatives ◽  
Palm Kernel Shells

The Shell activated carbon for activated carbon. Activation of char prepared at 600 C. Activated carbon prepared with high temperature char had a significant amount of microspore volume. For all carbonization rates, both microspore and macrospore volumes showed maximum values of carbon burn-off. Only a small amount of mesoporous was developed in the initial stage of activation. However, there has been a rapid development in mesoporous was observed. The pattern has been shown. Therefore, the voracious interest for energizes, eco-friendliness and execution assurance and calls for natural well-disposed elective fills sources, while not over depending on petroleum derivatives. The point of this work was to deliver carbonized carbon from palm kernel shells (PKS) via carbonization strategy at temperature of 600°C. The outcomes demonstrate that the AC created from PKS upon 2 days’ corrosive impregnation pursued by carbonation periods, purged both water bodies superior to anything the others on decrease of microbial and smaller scale pollution substance of the water bodies. The ramifications of the outcomes demonstrate that generation of the carbon from PKS is esteem expansion to oil palm handling, lift to the national economy and constructive natural effect to the general population that produce and use PKS. Thus, unique thing conclusions, for instance, bio energy and bio-broil age for adsorption purposes from palm partition shells, are enabled in system endeavors as against the sole traditional start for warmth creation. Available online at https://int-scientific-journals.com

Performance Test Results of a Precision Data Acquisition and Control Platform for 200°C+ High Temperature Environments

2018 ◽  
Vol 2018 (HiTEC) ◽  
pp. 000103-000111
Author(s):  
Jeff Watson ◽  
Maithil Pachchigar ◽  
Ross Bannatyne ◽  
Clay Merritt ◽  
Christopher Conrad ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Power ◽  
Data Acquisition ◽  
Performance Test ◽  
Rapid Development ◽  
Sensor Data ◽  
Harsh Environment ◽  
Test Results ◽  
Precision Data ◽  
And Control

Abstract In recent years there has been an increasing selection of commercially available electronic components specified for very high temperature (200C+) operation, driven by the needs of harsh-environment applications such as oil and gas exploration/production, aerospace, heavy industrial, and automotive. However, there remains a significant technical challenge to integrate these components into reliable, high performance systems. We previously presented a complete reference design of a precision multichannel sensor data acquisition and control system rated to 200C, including characterized hardware, firmware, and software. The design is based around low power 16 bit SAR ADCs and an ARM® Cortex®-M0 processor and is optimized for high resolution and high throughput measurements while maintaining low power and a small footprint. In this paper we present the test results of this system over temperature. The reference platform is available off the shelf, including hardware design files, processor firmware source code, and PC software for data logging and display, providing engineers a rapid development tool for prototyping and a faster path to production for complex harsh-environment applications.

Study of Forming & Exfoliation Mechanism of Oxide Skin in High-Temperature Tube of Supercritical Boiler

2012 ◽  
Vol 516-517 ◽  
pp. 524-529 ◽  
Author(s):  
Ming Tao Cheng
Keyword(s):  
High Temperature ◽  
Power Plant ◽  
Metal Oxide ◽  
Rapid Development ◽  
Reference Value ◽  
Steam Oxidation ◽  
Boiler Tube ◽  
Skin Formation ◽  
Oxide Skin ◽  
Explosion Accidents

In recent years, with the rapid development of supercritical units also brings some serious problems, for example, due to the oxide skin exfoliation of boiler tube caused many boiler tube explosion accidents. Aiming at this problem, the paper first introduced commonly used steel and its resistance to steam oxidation, and then the metal oxide skin formation and exfoliation mechanism is studied. These findings have a certain reference value for the power plant safe and economy operation.

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