Journal•ISSN: 2299-3843
International Letters of Chemistry, Physics and Astronomy
SciPress Ltd.
About: International Letters of Chemistry, Physics and Astronomy is an academic journal. The journal publishes majorly in the area(s): Thin film & Coronal mass ejection. It has an ISSN identifier of 2299-3843. Over the lifetime, 954 publications have been published receiving 3378 citations.
Topics: Thin film, Coronal mass ejection, Ion exchange, Liquid crystal, Band gap
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TL;DR: ZnO nanoparticles were synthesized by microemulsion route in W/S ratio of 5 at room temperature X-ray diffraction (XRD) pattern reveals wurtzite structure of ZnO particles as mentioned in this paper.
Abstract: ZnO nanoparticles were synthesized by microemulsion route in W/S ratio of 5 at room temperature X-ray diffraction (XRD) pattern reveals wurtzite structure of ZnO nanoparticles Rod shape of ZnO nanoparticles of average particle size 100 to 120 nm were observed by transmission electron microscopy FT-IR spectra confirmed the adsorption of surfactant molecules at the surface of ZnO nanoparticles and presence of Zn-O bonding Thermal studies were carried out by the differential scanning calorimeter (DSC) techniques In addition, UV-Visible spectra were employed to estimate the band gap energy of ZnO nanoparticles
255 citations
TL;DR: ZnO thin films with Cd/Zn nominal ratios of 0 %, 1 %, 3 %, 5 % and 7 % and thickness of 0.7 µm were prepared by chemical spray pyrolysis as mentioned in this paper.
Abstract: ZnO thin films with Cd/Zn nominal ratios of 0 %, 1 %, 3 %, 5 %, and 7 % and thickness of 0.7 µm were prepared by chemical spray pyrolysis. X-ray diffraction patterns showed that the films have polycrystalline structures and peaks matching the hexagonal ZnO structure. Crystallite sizes ranged from about 35 nm to 87 nm. As the doping concentration increased, full width at half maximum values decreased and crystallite sizes increased. The UV-Vis spectra of the ZnO:Cd films showed high transparency in the visible region. The optical band gap of the ZnO:Cd films decreased from 3.255 eV to 3.17 eV with increasing Cd doping concentration. The transition type was direct, thereby allowing transition. The ZnO:Cd thin films were annealed at 400 °C, and annealing treatment showed improvements in the properties of the derived films.
50 citations
TL;DR: In this paper, the chemical constituents of Eucalyptus globulus essential oil (EGEO) of Blida origin has been investigated for determination of chemical constituents and different physico-chemical properties of the EGEO.
Abstract: Despite the reputation earned by aromatic and medicinal plants of Algeria, the chemical constituents of Eucalyptus globulus essential oil (EGEO) of Blida origin has not previously been investigated. Thus, the present study has been conducted for the determination of chemical constituents and different physico-chemical properties of the EGEO. Chemical composition of the EGEO, grown in Algeria, was analysed by Gas Chromatography-Mass Spectrometry. The chemical components were identified on the basis of Retention Time and comparing with mass spectral database of standard compounds. Relative amounts of detected compounds were calculated on the basis of GC peak areas. Fresh leaves of E. globulus on steam distillation yielded 0.96 % (v/w) of essential oil whereas the analysis resulted in the identification of a total of 11 constituents, 1.8 cineole (85.8 %), αpinene (7.2 %), and β-myrcene (1.5 %) being the main components. Other notable compounds identified in the oil were β-pinene, limonene, α-phellandrene, γ-terpinene, linalool, pinocarveol, terpinen-4-ol, and α-terpineol. The physical properties such as specific gravity, refractive index and optical rotation and the chemical properties such as saponification value, acid number and iodine number of the EGEO were examined. The oil extracted has been analyzed to have 1.4602 - 1.4623 refractive index value, 0.918 - 0.919 specific gravity (sp.gr.), +9 - +10 optical rotation that satisfy the standards stipulated by European Pharmacopeia. All the physical and chemical parameters were in the range indicated by the ISO standards. Our findings will help to access the quality of the Eucalyptus oil which is important in the production of high value essential oils that will help to improve the economic condition of the community as well as the nation.
46 citations
TL;DR: In this article, a commercial grade ABS was collected from a local supplier of Chidambaram town and the ABS was used to study the mechanical properties of PET blend composites.
Abstract: There are fifteen waste pet bottles and a commercial grade ABS was collected from local supplier of Chidambaram town. The ABS was used to study the mechanical properties of PET blend composites. This study was performed by FT-IR spectroscopy. From the characteristics infra-red stretching bands the mechanical properties of samples were discussed
44 citations
TL;DR: In this paper, the authors present PolyMiner Ltd., which is a company that provides a solution to the problem of the lack of infrastructure in the field of artificial intelligence. But they do not specify the infrastructure.
Abstract: В статье дается обзор производства и применения неизоцианатных полиуретанов на основе циклических карбонатных олигомеров. Неизоцианатные полиуретановые (NIPU) сети получают путем реакции между полициклическими карбонатными олигомерами и алифатическими или циклоалифатическими полиаминами с первичными аминогруппами. Это формирует сшитый полимер с β-гидроксиуретановыми группами различного строения - полигидроксиуретановый полимер. Он рассматривается как надлежащий неизоцианатный полиуретановый и гибридный полимер, включающий другие различные олигомерные системы (HNIPU). Значительное внимание было уделено материалам на основе возобновляемых необработанных источников. Автор приводит обзор последних публикаций в данной области с более подробным описанием достижений Polymate Ltd. Ключевые слова
38 citations