70 research outputs found
Performance Evaluation of Water-Injection Cyclone Treating a Synthetic Mixture
The effect of change in operating variables i.e., vortex finder diameter,spigot diameter nd water injection rate on different performance numbers is studied in water-injection cyclone treating a synthetic mixture of atomized Ferro-silicon and ground silica sand. Suitable empirical
models relating the operating variables and fines (below 25 microns) recovery, ferro-silicon and silica recoveries in the overflow productand the separation efficiency at 25 microns size are developed. At comparable levels of ope-rating throughput, the performance numbers obtained in a 100mm water-injection cyclone and a 100mm normal hydro- cyclone are discussed.
An overall fines recovery of 85.6% was obtained in the overflow product of water-injection cyclone whereas in a normal hydrocyclone the combined fines recovery in the overflow product was 46.2%. Similarly the ferro-silicon recovery at fines below 25 microns in the overflow product from water-injection cyclone was 55.5% while that of hydro-cyclone was only 9.8%. Also, silica recovery at fines below 25 microns in the overflow product of a water-injection cyclone was 98.6% in comparison to 82.1% in a normal hydrocyclone. Separation efficiency values obtained between coarse and fine products at 25 microns in the
overflow product of water-injection cyclone and hydro-cyclone were 83.5% and 45.8% respectively which indicates sharper classification in water-injection cyclone
Amino acid recognition for automatic resonance assignment of intrinsically disordered proteins
The Indian cobra reference genome and transcriptome enables comprehensive identification of venom toxins
Snakebite envenoming is a serious and neglected tropical disease that kills ~100,000 people annually. High-quality, genome-enabled comprehensive characterization of toxin genes will facilitate development of effective humanized recombinant antivenom. We report a de novo near-chromosomal genome assembly of Naja naja, the Indian cobra, a highly venomous, medically important snake. Our assembly has a scaffold N50 of 223.35 Mb, with 19 scaffolds containing 95% of the genome. Of the 23,248 predicted protein-coding genes, 12,346 venom-gland-expressed genes constitute the \u27venom-ome\u27 and this included 139 genes from 33 toxin families. Among the 139 toxin genes were 19 \u27venom-ome-specific toxins\u27 (VSTs) that showed venom-gland-specific expression, and these probably encode the minimal core venom effector proteins. Synthetic venom reconstituted through recombinant VST expression will aid in the rapid development of safe and effective synthetic antivenom. Additionally, our genome could serve as a reference for snake genomes, support evolutionary studies and enable venom-driven drug discovery
Characteristics of Different Systems for the Solar Drying of Crops
Solar dryers are used to enable the preservation of agricultural crops, food processing industries for
dehydration of fruits and vegetables, fish and meat drying, dairy industries for production of milk powder,
seasoning of wood and timber, textile industries for drying of textile materials. The fundamental concepts and
contexts of their use to dry crops is discussed in the chapter. It is shown that solar drying is the outcome of
complex interactions particular between the intensity and duration of solar energy, the prevailing ambient
relative humidity and temperature, the characteristics of the particular crop and its pre-preparation and the
design and operation of the solar dryer
Rift Valley fever virus NSs protein functions and the similarity to other bunyavirus NSs proteins
Emancipating and Strengthening Indian Women: An Analysis of B. R. Ambedkar’s Contribution
Classification studies of lead–zinc ore fines using water-injection cyclone.
Classification studies to recover liberated particles of lead and zinc minerals from a ground lead–zinc ore were carried out using a 100-mm water-injection cyclone. The effects of variables on the performance of water-injection cyclone are discussed. The results indicated that the injection water rate has a complex interaction with the other variables like spigot opening, feed inlet pressure, and vortex finder opening. A set of empirical equations for slurry throughput, corrected cyclone cut size, minimum distribution point, and reduced efficiency numbers was developed for predicting the performance of water-injection cyclone. Finally, the results obtained in water-injection cyclone are compared with the data obtained on a similar diameter (100 mm) hydrocyclone
Graphite rejection in a lead concentrate using gravity concentration techniques
During the sequential flotation of the ore from Dariba-Rajpura mines of Hindustan Zinc Limited (India), graphite reports in considerable amounts into the lead concentrate. Graphite above a stipulated limit of 2.5% decreases the sinter strength to a great extent. Reports on flotation routes for graphite rejection from lead concentrate showed limited success. In the present study, attempts were made for exploiting the specific gravity differential between graphite and lead-bearing minerals using gravity techniques. Lead rougher concentrate collected from the operating plant was treated in a laboratory model multi-gravity separator and in a 75mm water-only cyclone. The metallurgical data obtained at different test conditions was analysed. The results indicated that lead concentrates with a graphite could be obtained using both the techniques. The concentrate grade and recovery values obtained in multi-gravity separator were better than water-only cyclone. However, considering the capacity of both the units. The possibility of a hybrid circuit with water-only cyclone as a pre-concentrator and multi-gravity separator for graphite rejection from water-only cyclone overflow product is discussed
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