Environmental chemistry

Gasmalla et al Trop J Pharm Res, January 2014;13 (1): 61 Tropical Journal of Pharmaceutical Research January 2014; 13 (1): 61-65 ISSN: 1596-5996 (print); 1596-9827 (electronic) © Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, 300001 Nigeria. All rights reserved. Available online at http://www.tjpr.org http://dx.doi.org/10.4314/tjpr.v13i1.9 Original Research Article Nutritional Composition of Stevia rebaudiana Bertoni Leaf: Effect of Drying Method Mohammed Abdalbasit…

3.0 Hypothesis I assume that as the solution is treated with higher amount of fertilizer, the Spirulina cells will reproduce better and survive for longer time as there will be higher amount of nutrients supplied. Therefore, it is assumed that the Spirulina-concentration of the trials treated with 1.0mL fertilizer will be higher than those treated with 0.5mL or 0.0mL. Although wastewaters contain elements which are vital for the Spirulina growth, as it contain other unknown substances as well,…

Results and Discussion A. Diffusion of selected plant pigments In conducting the diffusion of 4 different kinds of treatments (distilled water, distilled water placed in boiling bath, vegetable oil, heated vegetable oil), the researchers made use of the atsuete and sugar beets. The different kinds of treatments determined how the temperature will affect the color intensity of the atsuete and sugar beets. There were 4 test tubes used in each atsuete and sugar beets with each having a…

120]. Hydrogels can trap drug and protect it against hostile environments for slow release via diffusion or erosion depending on the state of hydration. They can also control rate of drug delivery through changing the structure in response to environmental stimuli such as temperature, pH, electrical and magnetic fields, solvent composition, light, ions, etc. [121]. Research on drug delivery systems has mainly focused on hydrogels because hydrogels not only reduce common problems associated with…

Surfactant Agents I. Definitions a. Surfactant: A surface-active agent that lowers surface tension i. Examples 1. soap 2. detergent b. Surface Tension: Force caused by attraction between like molecules that occurs at liquid-gas interfaces and that holds the liquid surface intact i. Units of Measure: dynes/centimeter (dyn/cm) 1. the force required to cause a 1 cm rupture in the surface film ii. a droplet forms because a liquid’s molecules are more attracted to each other than the surrounding…

STEPS IN BALANCING REDOX EQUATIONS 1) Assign the Oxidation Numbers The Oxidation Number (ON) of an element is its charge. It is the number of electrons an element contains. This would be our basis on whether the element gained or lost electrons in chemical reactions. We can say that an element is in its Oxidation State when the element already has a specific ON. Unlike with our previous examples, not all equations would already reveal the ON of each element. In actuality, equations would…

What is a laccase? Laccases (EC 1.10.3.2, benzenediol: oxygen oxidoreductase) are monomeric, dimeric or tetrameric glycoproteins that are typically extracellular and categorized as multi copper oxidases (Mate and Alcalde, 2016a).They catalyze the oxidation of compounds that are coupled with the four-electron reduction of "O" _"2" "to" "H" _"2" "O" . They are regarded as eco-friendly enzymes. Laccases have been first discovered in 1883, which makes it one of the oldest enzymes ever observed…

The role of oxysterols in human body and disease 1. Introduction Oxysterols are 27-carbon derivatives of cholesterol created by spontaneous or enzymatic oxidation (Figure 1, (Brown and Jessup, 2009)). The oxidation of cholesterol occurs either on the side chain or on the sterol core. Side chain oxidation generates, e.g., 24-hydroxycholesterol (24-HC), 25-hydroxycholesterol (25-HC) or 27-hydroxycholesterol (27-HC) while the core oxidation gives rise to ring oxysterols, mostly ring-B oxysterols,…

USING ICT IN CHEMISTRY EDUCATION LOKENDRA KUMAR OJHA Lovely Professional University, Jalandhar, Punjab ojha.lokendra@gmail.com Abstract There are several topics in chemistry which required computational technique to learn and use of ICT enhance learning capacity of learner as well as facilitator. The present article deals with the use of ICT in some of the topic of chemistry. We tried to overcome from routine chalk and talk method to understand the several topic viz. stereochemistries, IUPAC…

Introduction The purpose of this lab was to identify the lipids in an egg yolk and to identify the amount of lipids in milk [1]. To extract the lipids from the egg yolk, the egg yolk needed to be combined with an organic solvent such as a mixture of CHCl3/MeOH. An organic solvent was needed to carry the extracted lipids up the TLC plate because the plate was polar, due to the presence of silica gel (silanol groups). To compare relatively similar lipids to the ones found in the egg yolk, the egg…