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Current Issues

International Research Journal of Natural and Applied Sciences (IRJNAS)
S.No Particular Pdf Page No.
1
  • OZONE LAYER DEPLETION: CAUSES & CONSEQUENCES


  • SUMAN LATA

Abstract:
The ozone layer is found in the lower portion of the earth’s atmosphere. It has the potential to absorb around 97-99% of the harmful ultraviolet radiations coming from the sun that can damage life on earth. If the ozone layer was absent, millions of people would develop skin diseases and may have weakened immune systems. However, scientists have discovered a hole in the ozone layer over the Antarctica. This has focused their concern on various environmental issues and steps to control them.


1-4
2
  • Investigation by Tailoring of Mesoporous Co3O4(111) supported on Metal Wire Mesh for CO oxidation reaction


  • Sami Barkaoui1, Samir Chakhari2,Tijani Hammedi2,Gunel IMANOVA3,*, Hassouna Dhaouadi1, and Fathi Touati1

Abstract:
A new structured catalyst made up of mesoporous Co3O4 nanowires arrays supported on a stainless steel mesh is presented. Asignificant advantage of this material is that the formation and growth of cobalt oxide nanowires takes place on the surface of stainless steel wires. The obtained Co3O4 nanowires arrays supported on a stainless steel mesh with crystal plane (111) exhibit better catalytic activity toward CO oxidation, The light-off temperature (10% conversion) of CO oxidation on the catalyst was at 25°C and when the temperature reaches 120°C, the CO conversion ratio reaches 100%, suggesting that it might also be applicable in other fields such as lithium-ion batteries and supercapacitors.


5-11
3
  • INVESTIGATION O φCas(F0Ia) SUPERGIANT ATMOSPHERE


  • Z. А. SAMEDOV1.2*, G.M.HAJIEVA2, S.Sh. RAJABOVA1

Abstract:
The atmosphere of supergiant φCas(F0Ia) is investigated by the method of atmospheric model. Effective temperature and surface of gravity are determined by comparing the observed and theoretical values of photometrical indices [c1], Q, and equivalent widths of Balmer lines: Тeff= 7350±200 К, logg=0,4±0.2.


12-25
4
  • Role of height in site selection for nesting in wooden nest boxes and natural sites by Indian Myna


  • Dr. Arvind Kumar

Abstract:
The Indian myna (Acridotheres tristis) are distribute all over India, also known as an Asian starling (family Sturnidae and order Passeriformes) that has become also established in many part of the world, out side of its native range due to accidental or deliberate introduction by humans. They nest were built in holes or cavity of walls, trees, wells, rocks, old building, under pass of highway and railway station etc. The experiment was started on 2nd March 2022 in which ten wooden box were placed at different heights (9 to 10 feet, 12 to 15 feet and 18 to 20 feet) in campus of government degree college B.B. Nagar, Bulandsahar, U.P., India. In this study area the total number of eggs laid were seventeen (17) in breeding month from March to July 2022 for a period of five months. It was observed that all the three nest box were placed on the wall of the ground floor, which were placed at a height of 9 to 10 feet, and these three nest boxes were completely safe from predators, adequate amount of food and water, protected from storms and naturally conducive for the development of chicks or reproductive success of Indian myna. So Indian myna preferred this areas for selection of nesting site.


26-31
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