On the spawning activities of kingfish, Scomberomorous commerson, in Oman waters

The spawning activities of kingfish, Scomberomorus commerson, in Oman waters are traced out for the first time. The possible spawning period and spawning ground are identified on the basis of collection of its eggs and larvae from Oman waters. The eggs and early larval characteristics are described suitably with photographic illustration of 4.9 mm larva. The optimum surface water temperature and salinity recorded for the occurrence of kingfish eggs and larvae are 23.57-26.05°C and 36.0-36.1‰, respectively

Application Of Neutrosophic Sets Based On Neutrosophic Negative Score Function in Medical Diagnosis

Medical diagnosis is the process of determining which illness or disease is causing an individual’s symptoms and warning signs. It is most commonly referred to as analysis, with the clinical environment implied. The evidence required for discovery is typically acquired from a clinical study and an examination of the individual seeking medical treatment. The major purpose of this research is to use topology to establish a methodical technique for decision making difficulties in order to select the appropriate attributes and alternatives for neutrosophic negative score function. In addition, we use a neutrosophic topological space based on attributes and alternatives, as well as graphical representation, to apply a neutrosophic negative score function in medical diagnosis problems

Prawn, fish and molluscan seed resources along the Kerala and Tamilnadu coasts

The study detailed about the occurrence and quantitative abundance of prawn, fish and molluscan seed resources, their spatial, seasonal and diurnal variations, abundance in relation to lunar periodicities, influence of environmental features and pollution on them and areas suitable for brackishwater culture along the Kerala and Tamilnadu coasts

Formation of graphene nanoribbons and Y-junctions by hydrogen induced anisotropic etching

Metal nanoparticles and H2 induced etching of graphene are of significant interest to synthesise graphene nanoribbons and various other structures with crystallographically defined edges. Here, we demonstrate a controllable H2-induced etching process of graphene crystals to fabricate nanoribbons, and Y-junction structures with pronounced edges. Individual graphene crystals and continuous films were grown on Cu foil by the solid source chemical vapor deposition (CVD) technique. The etching behavior of the synthesized graphene was investigated by annealing at 1000 °C in a gas mixture of H2 and Ar. A highly anisotropic etching creates hexagonal holes, nanoribbons and Y-junction graphene with clear edge structures. The distinct graphene edges of individual ribbons create a 120° angle to form a Y-shaped structure. The finding may be significant for fabricating well-defined graphene structures with controlled edges for electronic device applications as well as creating in-plane heterostructures with other two dimensional (2D) materials

Fabrication of particular structures of hexagonal boron nitride and boron-carbon-nitrogen layers by anisotropic etching

Anisotropic etching of hexagonal boron nitride (h-BN) and boron-carbon-nitrogen (BCN) basal plane can be an exciting platform to develop well-defined structures with interesting properties. Here, we developed an etching process of atomically thin h-BN and BCN layers to fabricate nanoribbons (NRs) and other distinct structures by annealing in H2 and Ar gas mixture. BCN and h-BN films are grown on Cu foil by chemical vapor deposition (CVD) using solid camphor and ammonia borane as carbon, nitrogen and boron source, respectively. Formation of micron size well-defined etched holes and NRs are obtained in both h-BN and BCN layers by the post growth annealing process. The etching process of h-BN and BCN basal plane to fabricate NRs and other structures with pronounced edges can open up new possibilities in 2D hybrid materials

Structure dependent hydrogen induced etching features of graphene crystals

H2 induced etching of graphene is of significant interest to understand graphene growth process as well as to fabricate nanoribbons and various other structures. Here, we demonstrate the structure dependent H2 induced etching behavior of graphene crystals. We synthesized graphene crystals on electro-polished Cu foil by an atmospheric pressure chemical vapor deposition process, where some of the crystals showed hexagonal shaped snowflake-dendritic morphology. Significant differences in H2 induced etching behavior were observed for the snowflake-dendritic and regular graphene crystals by annealing in a gas mixture of H2 and Ar. The regular graphene crystals were etched anisotropically creating hexagonal holes with pronounced edges, while etching of all the dendritic crystals occurred from the branches of lobs creating symmetrical fractal structures. The etching behavior provides important clue of graphene nucleation and growth as well as their selective etching to fabricate well-defined structures for nanoelectronics

Synthesis of uniform monolayer graphene on re-solidified copper from waste chicken fat by low pressure chemical vapor deposition

A technology for converting waste materials to high quality large-area monolayer graphene film can be significant and thereby obtaining high value-added product. Here, we revealed the transformation of waste chicken fat into uniform monolayer graphene film on re-solidified Cu by a low pressure chemical vapor deposition (LPCVD) technique. The evolve gas analyzer-gas chromatography–mass spectrometry (EGA-GC–MS) analysis of chicken fat oil showed that the free fatty acid in chicken oil decomposed into a short hydrocarbon chains which makes it favorable to use as a carbon precursor for graphene synthesis. Growth of uniform monolayer graphene film on the re-solidified Cu was confirmed by Raman mapping, where 2D to G peak intensity ratio (I2D/IG) is 3.0 at most of the area. Thus, the use of waste from poultry industry as a carbon source instead of commonly used hydrocarbon gas sources for graphene synthesis can be an approach for green nanotechnology