Easily recognized splitting patterns found in various spectra provide the chemical shifts of the different sets of hydrogen that generate the signals differ by two or more ppm. The patterns are symmetrically distributed on both sides of the proton chemical shift, and the central lines are always stronger than the outer lines. The most commonly observed patterns have been given descriptive names, such as doublet […]
Chapter- 1 General Introduction 1 Chapter 1 General Introduction 1.1 Heterocycles in drug discovery Currently pharmaceutical manufacturing is facing many problems for research and development due to high costs and changeless existence of moieties in these days. According to research of human genome we got assumption that at least 1000 genes are involved in identified and non identified disease. For that research about 20,000 human […]
Tziamourani Athanasia Analysis of cherry flavour using GC-MS and development of a recombinate Cherry is one of the most important fruits globally and a non-climacteric stone fruit, mainly grown in temperate climate countries. The most important factors that contribute to the uniqueness of cherry include skin colour, sweetness (sugar content), sourness (organic acid content), fruit firmness, fruit weight and aroma. The compounds that contribute to […]
Results and discussions Synthesis of HAp/Chitosan/Dopamine films Two types of HAp-chitosan composite films were prepared: HAp-chitosan films with and without dopamine (Figure 1). The weight ratio between HAp and chitosan in the films was fixed to 50 wt% since the HAp content in human bones is about 50-70wt% in dry weight28-30. In comparison with the 50 wt% HAp-chitosan, 70 wt% HAp-chitosan films containing dopamine were […]
MATERIALS AND METHODS 4.1. PLANT MATERIAL 4.1.1. COLLECTION OF PLANT The plant aerial parts of Givotia moluccanawas collected and Authentified by Dr. K. Madhava Chetty, Department of Botany, Sri Venkateswara University, Tirupathi (AP). 4.1.2. PREPARATION OF THE EXTRACT The dried leaves of G. moluccana was collected, cleaned, dried and powdered in a grinder - mixer to obtain a coarse powder and then passed through 40 […]
Chapter 5 Materials and methods to study formulation models 5.1. Materials Oils and Surfactants: Ethyl Oleate obtained from Sigma-Aldrich; FK-Sunflower Oil obtained from Fresenius Kabi; FK-MCT Oil obtained from Fresenius Kabi; Miglyol 840 obtained from Sasol; Tween 80 viscous liquid obtained from Sigma-Aldrich; Labrasol obtained from Gattefossé; Model API. Devices: Sartorius, Scale Extend, Model ED2245; IKA RET basic, magnetic stirrer; Thermo Electron Corporation, HERAEUS Pico17 centrifuge; […]
Ali Ghafarinazari1, 2 ï›ï€ªï, Esfandiar Amiri1, Mahnaz Karbassi3, Morteza Soroor1, Talieh Rajabloo3 Abstract Zircon as an opacifier material is under the very real risk of being replaced. This is mainly because of two reasons: the anticipated shortage of high-quality grade zircon, and high costs associated with the production of zircon as an opacifier material, which is resulting in upward pressure on zircon prices. This […]
ADSORPTION OF VOLATILE ORGANIC COMPOUNDS ON DIFFERENT TIMBER SPECIES Marco Vasconcelos1, Nereida Cordeiro1,2* ABSTRACT Due to the health issues associated to VOC, this work aims to study the adsorption of these compounds onto timbers, in order to improve air quality. For this task, inverse gas chromatography (IGC) was used to characterize surface properties (surface energy, specific free energy and enthalpy of adsorption). Dispersive component […]
Heterocycles1 are one of the major classes of organic compounds. They are cyclic compounds containing one or more heteroatom (oxygen, nitrogen, sulphur etc.). These compounds are of biological and industrial importance. Many materials that are essential to life include a heterocyclic moiety; examples of these are: amino acids, nucleic acids, pigments, vitamins, antibiotics and many more. Heterocycles are part of our everyday life and are […]
Tyrosinases oxidise phenolic hydroxyl groups of small molecules or large polymeric substrates such as proteins. Tyrosinases catalyse first the ortho-hydroxylation of the phenolic substrate and second its subsequent oxidation to quinone (Figure 1) with the concomitant reduction of oxygen to water. The reaction is chromogenic as the quinones produced can undergo further non-enzymatic polymerisation to form black eu-melanins and, when reacting with thiol groups, brownish […]
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