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23 results for “chemical bond”
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Research ArticleOpen accessPhrase in the titlePresents Some Aspects Related to the Atom and Atomic Electrons, Necessary in Understanding Chemical Bonds and NanotechnologiesFlorian Ion Tiberiu PetrescuThe paper presents briefly some aspects regarding the atom and its electrons, these being absolutely necessary for understanding the molecular bonds and future nanotechnologies. It is briefly presented how to determine the energies of the atomic electrons, their speeds of movement in the atomic orbit but also of rotation around a proper axis of the atomic electron, the kinetic energies … …American Journal of Applied Sciences, Vol. 17, Issue 1 · 24 May 2020 · 7,241 accessesView PDFCite
Research ArticleOpen accessIn the keywordsShear Bond Strength of Four Cariostatic Tooth Colored Materials to Dentin of Permanent Premolar TeethE. Farrokhgisu, A. EskandarizadeProblem statement: The purpose of this study was to compare the shear bond strength of four cariostatic restorative materials to dentin of permanent teeth. Approach: Restorative materials which have used in the study were composite P60 (3M), conventional glass ionomer (Fuji II, GC), light cured glass ionomer (Vitremer, 3M), compomer (F2000, 3M) and flow compoglass (Vivadent). This study was in … …Current Research in Dentistry, Vol. 1, Issue 2 · 16 Jul 2011 · 8,090 accessesView PDFCite
Review ArticleOpen accessIn the abstractThe Impact of Di-2-Ethylhexyl Phthalate (DEHP) in Focus on the Reproductive System and Toxicity in Rat or Mammalian ModelVenkataramanaiah Poli, Srinivasulu Reddy MotireddyAbsalan, F., Saremy, S., Mansouri, E., Moghadam, M. T., Moghadam, A. R. E., & Razie, G. (2016). Effects of Mono-(2-Ethylhexyl) Phthalate and Di-(2-Ethylhexyl) Phthalate Administrations on Oocyte Meiotic Maturation, Apoptosis and Gene Quantification in Mouse Model. Cell Journal, 18(4), 503–513. https://doi.org/10.22074/cellj.2016.4717 Acevedo‐Rodriguez, A., Kauffman, A. S., Cherrington, B. D., Borges, C. S., Roepke, T. A., & Laconi, M. (2018). Emerging … …American Journal of Pharmacology and Toxicology, Vol. 19, Issue 1 · 6 Jun 2024 · 12,990 accessesView PDFCite
Research ArticleOpen accessIn the abstractExploratory Study on the Fracture Resistance of Cast GlassTelesilla Bristogianni, Faidra Oikonomopoulou, Fred Veer, Rob NijsseThe emerging interest in the architectural applications of cast glass components reveals a knowledge gap on the mechanical properties of cast glass. Apart from its chemical composition, cast glass is characterized by its manufacturing history and thermal profile, often inheriting a set of defects that define its properties. The role that inhomogeneities in the bulk of voluminous glass components have … …International Journal of Structural Glass and Advanced Materials Research, Vol. 5, Issue 1 · 4 Jun 2021 · 7,356 accessesView PDFCite
Research ArticleOpen accessIn the abstractInvestigation of the Fatty Acid Profile in Some Macroalgae in Relation to the Environmental Conditions for Biodiesel ProductionNayrah Abdel Naby Shaltout, Nihal Galal Shams El-DinIn this study, fatty acids profile was determined in four algal species; namely Ulva fasciata (Chlorophyta), Corallina mediterranea, Corallina officinalis and Pterocladiella capillacea (Rhodophyta) which were collected from two sites (Abu-Qir Bay and Eastern Harbor) located on the Egyptian Mediterranean Sea during the four seasons in the period (2011-2012). In addition, nutrient content in the algal species (total nitrogen and … …American Journal of Environmental Sciences, Vol. 11, Issue 6 · 14 Dec 2015 · 7,334 accessesView PDFCite
Research ArticleOpen accessIn the abstractTheoretically Predicted Descriptors Based Quantitative Structure Activity Relationship Study of the Activity of Acridines Against B-16 MelanomaBahjat A. Saeed, Rita S. Elias, Sadiq M-H. Ismael, Kawkab A. HussainProblem statement: The probability of success and reducing time and coast in drug discovery process could be increased on the basis of QSAR techniques. The study involves the QSAR investigation of 20 bioactive acridines that have activity against Approach: Molecular descriptors, total energy, van der Waals volume, molecular volume, HOMO energy, HOMO-LUMO energy gap, polarizability, refractivity, bond angle of C8-N9-C2 … …American Journal of Applied Sciences, Vol. 8, Issue 8 · 18 Jul 2011 · 7,689 accessesView PDFCite
Research ArticleOpen accessIn the abstractSynthesis and Characterization of Organotin(IV) N-Benzyl-N-Isopropyldithiocarbamate Compounds: Cytotoxic Assay on Human Hepatocarcinoma Cells (HepG2)Normah Awang, Ibrahim Baba, Nor Syaidatul Akmal Mohd Yousof, Nurul Farahana KamaludinProblem statement: Several studies on organotin(IV) dithiocarbamate compounds have been carried out but not on the synthesis and characterization together with cytotoxic assay of organotin(IV) N-benzyl-N-isopropyldithiocarbamate compounds. Approach: Three new organotin(IV) compounds of type N-benzyl-N-isopropyldithiocarbamate have been successfully synthesized by direct reaction between secondary amine with organotin(IV) chloride using in situ method. All the compounds were characterized using elemental analysis, … …American Journal of Applied Sciences, Vol. 7, Issue 8 · 31 Aug 2010 · 8,092 accessesView PDFCite
Research ArticleOpen accessIn the abstractPhysical Properties of Phenol Compound: Semi-empirical Calculation of Substituent Effects [Part One]Ammar A. Ibrahim, Eid A. AbdalrazaqProblem statement: Physical properties of phenol compound such as steric energy, charge of oxygen, ionization potential, dipole moment, LUMO and bond length have been calculated. Approach: All molecular geometries were minimized by quantum mechanic especially at (AM1) method was used to investigate the effect of a variety of substituents on the phenol (H, o-Cl, p-Cl, m-Cl, o-CH3, m-CH3, p-CH3, o-NH2, … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 7,365 accessesView PDFCite
Research ArticleOpen accessIn the abstractCharacterization of Boron Carbonitride (BCN) Thin Films Deposited by Radiofrequency and Microwave Plasma Enhanced Chemical Vapor DepositionM.A. Mannan, M. Nagano, K. Shigezumi et al.Boron carbonitride (BCN) thin films with a thickness of ~4 µm were synthesized on Si (100) substrate by radiofrequency and microwave plasma enhanced chemical vapor deposition using trimethylamine borane [(CH3)3N.BH3)] as a molecular precursor. The microstructures of the films were evaluated using field emission scanning electron microscopy (FE-SEM) and X-ray diffractometry (XRD). Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron … …American Journal of Applied Sciences, Vol. 5, Issue 6 · 30 Jun 2008 · 7,371 accessesView PDFCite