Category: CHEMISTRY & PHYSICS

Science Press Release Distribution Services

Use of the Arrhenius Equation in Kinetic Analyses and Mathematical Modeling of Rate Data Requires the Most Precise, Even Scrupulous, Application and Term Definitions

This article presents a critical analysis of the frequent practice of using the Arrhenius equation for mathematical modeling of very many physical and chemical rate processes. This approach may also be used to characterize the controls and mechanisms of the rate processes investigated. We also discuss  the  specific  form  of  the Arrhenius-type  equation  as  a …
Read more

July 24, 2019 0

Pericyclic Reactions vs Polar Reactions. Use of Heterocycles as Electrophiles. Microwave Irradiation

Considering the possibility of analyzing polar cycloaddition reactions, in this work we studied a series Diels-Alder reaction using different heterocycles derivatives acting as electrophiles joint to dienes of different nucleophilicity, analyzing the effect of the microwave irradiation in these processes. For this, two reaction conditions have been worked: toluene as solvent and solvent free. The…
Read more

July 24, 2019 0

Cu4SnS4 Thin Films: Advances in Research

Cu4SnS4 thin films have been synthesized using electro deposition, chemical bath deposition and Thermal evaporation method. XRD confirmed that these films have polycrystalline in nature with orthorhombic structure. The band gap was determined using UV-Visible spectrophotometry data, about 1.2 to 1.94 eV. The obtained films could be used in solar cell application due to appropriate…
Read more

July 24, 2019 0

Economic Design of OTEC Power Plant with Concurrent Production of Desalinated Water – A Case Study

Ocean Thermal Energy Conversion (OTEC) power plants offer a green source of renewable energy. Since  India  is  a  tropical  country  and  a  peninsula, the  prospects  of  OTEC power  generation  are extremely bright in India. Among the three modes of operation (open cycle, closed cycle and hybrid cycle) of OTEC system, the hybrid mode is most…
Read more

July 24, 2019 0

Superluminal Hydrogen Atom in a Constant Magnetic Field in (3+1)-dimensional Spacetime (II)

As has usually been the case in the tradition of some scientific novel ideas, we use the hydrogen atom as a “test particle”, in the context of superluminal dynamical system theory. In Paper (I) of this series, the fundamental effect of an applied external magnetic field on a transversely guided beam of hydrogen-like atoms is…
Read more

July 24, 2019 0

Semiconducting Oligomers of 1,4-dimethoxybenzene, Thiophene and Thiazole: A Theoretical Study

Organic semiconducting oligomers containing three to nine heterocyclic units and based on 1,4-dimethoxybenzene, thiophene and thiazole have been studied by DFT and TDDFT at the B3LYP/6-31G(d,p)  level.  The energy  of  each  molecule,  those  of  the frontier orbitals  HOMO and  LUMO,the width  of  the  band  gaps  and  the  optical  properties  have  been  calculated. The inter-ring distances,…
Read more

July 24, 2019 0

Thermochemistry of Organic Nitro Compounds and Strength of Bonds in Nitro Alkanes

The  linear  equation ∆cH° = i± f (N -g),  in which  i  and f  are  the  factors  of  correlation,  describing interdependence between then heat of combustion organic compounds and their number (N) valence electrons except for a  number of lone electron  pairs (g) heteroatoms in them, it  has been applied besides  to  the  most  thermochemical …
Read more

July 16, 2019 0

Enhanced Adsorption of Methylene Blue Using Distilled Water Neutralized Red Mud

This  work  is  aimed  at  improving  the  ability  of  red  mud  to  remove  methylene  blue  from  aqueous solution. The efficiency of methylene blue (MB) removal by untreated red mud was compared to that of red mud neutralized with distilled water. The pH, surface charge, particle size distribution, chemical composition,  infrared  spectrometry  and  morphology  analyses  were …
Read more

July 16, 2019 0

Concentration Levels of Iron (Fe), Copper (Cu), Lead (Pb), Cadmium (Cd), Chromium (Cr) and Selected Nutrients in Water of Motoine River Channel, Kibera, Kenya

The need for clean and safe consumable water is of paramount importance to any society since water is a crucial substance for the sustenance of life. Kibera slum is one of the leading slums in the world with  a high  population,  leading  to  poor  levels  of  sanitation  and  inadequate  clean  water  supply. Consequently, the residents…
Read more

July 16, 2019 0

Role of Atomic-Molecular Formations in Chemistry

An important task of chemistry is to establish patterns of dependence on the property of substances on  its  composition  and  structure.  That  is,  any  link  of  atomic  and  molecular  formations  exhibit physicochemical properties depending on the given conditions,expressing structural and energetic correspondence as part of a material object. Consequently, the task set requires an in-depth…
Read more

July 16, 2019 0

Advertisement

©  2023 2PressRelease. Built using WordPress and OnePage Express Theme.