Absorption spectroscopy

The band at 2350 cm-1 originates from the CO2 in the air [29]. The broad absorption bands that appear in the low frequency region of infrared spectrum, located in the range 450-850 cm−1 are characteristic of a Ti-O-Ti symmetric stretching vibration mode [4] and observed maximum at around 500 cm-1 corresponding to the stretching…

We’re currently in the technology era, with new things being developed and discovered almost every day. Something crazy is always in the works and the next big technology always seems to be right around the corner. Self-driving cars and iPhones aside, some of the biggest advancements are happening in the industry of space exploration and physics. SpaceX just recently landed a launched rocket safely onto a barge out in the ocean, LIGO discovered that Einstein’s predicted gravitational waves are…

Introduction Molecular orbital theory allows for the relation between the nature of chemical bonds and the properties of molecules.1 Many times, the frontier molecular orbitals, named HOMO and LUMO, are analyzed in order to predict these properties. In this lab, each double bond corresponds to a molecular orbital. The HOMO, or highest occupied molecular orbital is the most energetic (highest n-value) orbital that contains an electron. The n-value is equal to the number of double bonds present.…

Phase Solubility results The phase-solubility diagram (figure 1) obtained was classified as AL type(20) because the apparent solubility of ISH increased linearly with β-CD concentration over the entire concentration range studies, thereby suggesting the formation of a water soluble complex. A slope value of less than one indicated that an inclusion complex in a molar stoichiometric ratio of 1:1 was formed between the drug and β-CD in solution. The stability constant (718.58 M–1), computed from…

of the chosen materials. In this work, the prepared samples are studied using various techniques given below. • Powder X-ray diffraction(PXRD) • Ultraviolet –Visible spectrometry(UV) • Scanning electron microscopy(SEM) • Energy dispersive X-ray spectroscopy(EDS) 1.8.1 Powder XRD analysis (PXRD) The structural information of the prepared samples is examined through powder X-ray diffraction. X-ray crystallography is a tool, which is used to identify the crystal structure of a system. By measuring…

plasma concentrations after oral administration. Low aqueoussolubility is the major problem encountered with formulation development of new chemical entities. Any drug to be absorbed must be present in the form of an aqueous solution at the site of absorption. Water is the solvent of choice for liquid pharmaceuticalformulations. Mostof drugs weakly acidic and weakly basic with poor aqueous solubility. Hence various…

CHAPTER 2 LITERATURE REVIEW 2.1 Synthesis of Schiff base Method preparation for Schiff base ligand is a straight forward synthesis and easily modified using different amines and carbonyl compound. This could be one of the reasons that make Schiff base ligand popular in coordination chemistry research. Synthesis of Schiff base ligand commonly, taking place in alcohol through condensation reaction of amines and carbonyl compound. The acid/base catalysis or heating is employed in the synthesis…

Tempkin isotherm contains a factor that explicitly takes into account adsorbing species-adsorbate interactions . This isotherm assumes that the heat of adsorption of all molecules in the layer decreases linearly with coverage due to adsorbate-adsorbate interaction and adsorption was characterized by a uniform distribution of binding energies, up to some maximum binding energy. Tempkin isotherm has generally been used in the linearized and rearranged form as following:…

Chapter: Soil, Water and Air Pollution 1. Introduction: Definitions of soil, water and air pollution; sources and types of soil, water and air pollution, soil and water pollution status in India With rapid increase and development in industrial and agricultural sectors along with population explosion, huge amount of organic and inorganic waste is released in environment and causing serious threats to environment and agro-ecosystem. This procedure can bring about a danger in the human wellbeing.…

(EMR, for example, obvious light, a substance discharges. Each component emits a novel unique finger impression of light, so investigating the frequencies of this light distinguishes the substance that produced it. This method is called outflow spectroscopy and is an extremely valuable logical instrument. It is utilized as a part of space science to examine the components present in stars and in substance investigation. Electromagnetic radiation can be depicted regarding its wavelength the…