Research Papers of ACTAVELIT
Volume : 2 | Issue : 2
Zeolites synthesized from coal fly and bottom ashes were modified with the surfactant hexadecyltrimethylammonium bromide and were used as adsorbent to remove the dye Crystal Violet (CV) from aqueous solution. The coal fly ash and bottom ash used in the synthesis of the zeolites were collected in the largest coal burning thermoelectric complex of the Latin America - Thermoelectric Complex Jorge Lacerda, located in the Santa Catarina State, Brazil. The surfactant modified zeolites from fly ash (MZSF) and bottom ash (MZSB) were characterized to obtain chemical and mineralogical composition, and some physicochemical properties. The adsorption kinetic of CV onto adsorbents was discussed using the pseudo-first order, pseudosecond order and Elovich models, and the pseudo-second order model provided the best correlation of the experimental data. The equilibrium data was analyzed using equations linear and non-linear of the Langmuir and Freundlich models. The Freundlich model was better adjusted to the experimental data for the systems studied. The maximum adsorption capacities were 36.7 mg g-1 and 21.1 mg g-1 for CV/MZSF and CV/MZSB, respectively. The parameters of adsorption isotherms were used to predict the design of the equipment for performing adsorption discontinuous single stage.
Microorganisms are found in almost every habitat present in nature. Even in hostile environments such as the poles, deserts, geysers, rocks, and the deep sea. This study aims at investigating the status of bacterial contamination of staircase handrails of New Market in Ijebu-Ode in Ogun State. A total of 10 samples were collected using the sterile swabs sticks from 10 different staircase handrails (T Store handrail, B-S Store handrail, F bank handrail, G Store handrail, F-F Store handrail, S Store handrail, E Store handrail, P Store handrail, GB Store handrail) all in Ijebu-Ode new market, Ijebu- Ode, Ogun State. The swab sticks were labelled and taken to the laboratory for further analysis. The method used for isolations and identifications were standard microbial and biochemical techniques. After analysis, the most common bacterial isolated were gram positive, cocci shape, catalase positive and NaCl positive with isolated organisms as Staphylococcus aureus, Staphylococcus epidermidis, and Staphylococcus coagulans. The second most common bacterial growth on the samples were gram positive, short rod shape, NaCl positive and catalase positive they were Bacillus cereus and Bacillus subtilis. The presence of these bacterial organisms on the handrails is an indication that the handrails might acts as environmental vehicles for the transmission of infections and diseases.
Antioxidants present in natural sources help to scavenge free radicals and thus provide health benefits. This study reports the phytochemical compositions and antioxidant potentials of methanolic and aqueous extracts of the fruits of Adansonia digitata, Hyphaene thebaica, Parkia biglobosa, and Ziziphus abyssinica. Standard methods were used for all the analyses. The qualitative phytochemical screening indicated that Saponins, Carbohydrates, Flavonoids, phenols, Steroids and Terpenoids are present in the four fruits, while, Phlobatannins, Alkaloids, Anthraquinones and Glycosides were not detected in some of the fruits. The quantitative phytochemical screening was conducted only on alkaloids, phenols, flavonoids, tannins and saponnins. Antioxidant potential of Adansonia digitata fruit was 57.55 ± 0.15% and 51.80 ± 0.14% for methanolic and aqueous extract respectively. Hyphaene thebaica fruit has 28.93 ± 0.23% and 31.91 ± 0.14% for methanolic and aqueous extract respectively. Parkia biglobosa fruit extract has 2.13 ± 0.01% and 1.38 ± 0.01% for methanolic and aqueous extract respectively. While, Ziziphus abyssinica fruit extract has 11.80 ± 0.07% and 12.65 ± 0.07% for methanolic and aqueous extract respectively. These results indicated that, the fruits have radical scavenging and reducing capacities and can be used as sources of natural antioxidants.
The present study aimed to evaluate the Malathion pesticide on some neurotransmitter contents in different brain areas of male albino mice. Also, the effect of Malathion pesticide on some liver enzymes in treated mice representing glycolytic pathway as Hexokinase (HK), Pyruvatekinase (PK), Lactate dehydrogenase (LDH) and Glucose phosphate isomerase (GPI) and liver function enzyme represented by Aspartate aminotransferase (AST), Alanine aminotransferase (ALT), Acid phosphatase and alkaline phosphatase, were studied. The results showed that the daily oral administration of Malathion pesticide caused a significant decrease in neurotransmitter contents (NE, DA & GABA) in most of the tested brain areas (cerebellum, striatum, cerebral cortex, hypothalamus, brain stem and hippocampus). The present results showed that significant increase in glycolytic enzymes (PK, GPI and HK), Acid phosphatase and alkaline phosphatese (ALP) were observed in both infected and treated infected groups, while LDH, AST and ALT enzymes activities showed significant reduction. It was concluded that the pollution of the aquatic environment by Malathion pesticide, would adversely affect on some neurotransmitter contents in different brain areas and the metabolism of male albino mice.
: The present study aims at assessing the effects of ultraviolet (UVA;B) radiation in the leaves architecture of viola tricolor. Fully developed third trifoliate leaves from the top on 30 DAS (days after germination) viola tricolor under supplementary UV radiation (4 hours daily) were mentioned. UV (A;B) stress induced change in the leaf morphology and caused several injuries in vein pattern which were not recorded in normal plants. In general the leaves are simple, unifoliate (having a single leaf) with rounded shape in apex, cordrate in a base and crenate type in margin. The first order veins, type’s include pinnate, the second order veins will be reported brochidodromousand third order veins are ramified. The major vein's jacked by paranchymatous bundle sheath. The areoles are variable in size. They are triangular, tetragonal or polygonal in outline and with simple, linear and uni-veinlets with dichotomously branched vein endings. There is no relationship between the size of areoles and the number of vein endings. This characters that consist of venation pattern in viola tricolor under ultraviolet radiation were examined and have been seen significant difference. Features that have been seen in treated sample is reducing of leaf surface, folding in some part of leaf margin, irregular vein network that consist of vascular dissociation and without creation off usual areola with few blind vein-ending.