{"id":14895,"date":"2022-11-09T06:00:41","date_gmt":"2022-11-09T06:00:41","guid":{"rendered":"https:\/\/file.currentschoolnews.com\/?post_type=product&p=14895"},"modified":"2022-11-09T13:28:01","modified_gmt":"2022-11-09T13:28:01","slug":"generalized-mathematical-modeling-of-aqueous-humour-flow-in-the-anterior-chamber-and-through-a-mesh-channel-in-the-human-eye","status":"publish","type":"product","link":"https:\/\/pastexamquestions.com\/product\/generalized-mathematical-modeling-of-aqueous-humour-flow-in-the-anterior-chamber-and-through-a-mesh-channel-in-the-human-eye\/","title":{"rendered":"Generalized Mathematical Modeling of Aqueous Humour Flow in the Anterior Chamber and Through A Mesh Channel in the Human Eye"},"content":{"rendered":"

– Generalized Mathematical Modeling of Aqueous Humour Flow in the Anterior Chamber and Through A Mesh Channel in the Human Eye –<\/strong><\/span><\/p>\n

Download Generalized Mathematical Modeling of Aqueous Humour Flow in the Anterior Chamber and Through A Mesh Channel in the Human Eye<\/strong><\/span>. Students who are writing their projects can get this material to aid their research work.<\/span><\/span><\/p>\n

Abstract<\/strong><\/h3>\n

Lectins from the saline extract of Erythrophleum suaveolens <\/em>stem bark, <\/em>were isolated, partially purified, characterized and evaluated in terms of\u00a0 their\u00a0 larvicidal\u00a0 properties against Culex quinquefasciatus. <\/em><\/p>\n

Purification was done by precipitation with ammonium sulfate at 20% – 90% saturation. The ammonium sulfate precipitate was subjected to gel filtration using Sephadex G-75 resin.<\/p>\n

The two fractions with the highest heamaglutinating activity were further subjected separately to ion-exchange chromatography using Sp- Sephadex C-50 resin. The lectins in the crude extract and the purified lectins appeared as five bands at positions 38KDa, 28KDa, 26KDa, 11KDa and 9KDa on a SDS-PAGE electrophoregram.<\/p>\n

The lectins were found to be stable at the temperature\u00a0 range\u00a0 of 30- 600<\/sup>C and pH range of 3-7. The carbohydrate content of the crude\u00a0 extract,\u00a0 Gel I,\u00a0 Gel II, Ion I and Ion II peaks were 0.04%, 0.04%, 0.03%, 0.02%, and 0.01% respectively and showed specificity to mannose and galactose.<\/p>\n

A series of nine concentrations of the extracts ranging from 0.0001 mg\/L, 0.001 mg\/L, 0.01 mg\/L, 0.1 mg\/L, 1mg\/L, 5mg\/L, 10 mg\/L, 50 mg\/L and 100mg\/L were tested against the third instar larvae of Culex quinquefasciatus <\/em>and their percentage mortalities and LC50<\/sub> values were\u00a0 obtained.<\/p>\n

The crude extract of Erythrophleum suaveolens <\/em>show very high larvicidal activity with 96% mortality achieved at a concentration of 100 mg\/L and had an LC50<\/sub> of 4.39 mg\/L.<\/p>\n

The gel peaks of Erythrophleum suaveolens <\/em>showed larvicidal activities to Culex quinquefasciatus <\/em>larvae with 74.67% and\u00a0 69.33% mortality achieved\u00a0 at\u00a0 a\u00a0 concentration of 100 mg\/L and had LC50<\/sub> of 43.73mg\/L and 43.65mg\/L respectively.<\/p>\n

The ion exchange purified extracts of Erythrophleum suaveolens <\/em>showed low larvicidal activity to Culex quinquefasciatus <\/em>larvae with 10.67% and 9.33% mortality achieved at a concentration of<\/p>\n

100 mg\/L respectively. These results suggest that the saline stem bark extract of Erythrophleum suaveolens <\/em>is promising as a larvicide against mosquito larvae and can be used directly in small volumes in aquatic habitats and in\u00a0 mosquito\u00a0 population\u00a0 management programme<\/p>\n

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Introduction<\/strong><\/h3>\n

1.1 Background of the Study<\/strong><\/p>\n

Insect transmitted diseases are important health problems in the world. These vectors are insects such as mosquitoes (Roberts, 2002).Mosquitoes are among the most important group of insects in terms of their medical importance to both humans and animals.<\/p>\n

Most insecticides are non-selective, not biodegradable and can be harmful to other\u00a0 organisms\u00a0 and to the environment. An approach to obtain new efficient, safe\u00a0 and\u00a0 selective insecticides is the study of natural models such as the defensive mechanisms of plants (Ciccia et al., <\/em>2000).<\/p>\n

Bioactive organic compounds produced by plants can act\u00a0 as\u00a0 repellant, food deterrents, growth inhibitors, and toxins (Ezeonu et al., <\/em>2001; Carlini and Grossi-de-S\u00e1, 2002). Thus, crude plant extracts have been screened as natural and biodegradable forms to control pests and vectors of infectious diseases (Omena et al., <\/em>2007).<\/p>\n

Plant essential oils are, in some cases, highly active and economically viable for Insect control (Silva et al., <\/em>2008). The larvicidal activity of essential oils from Hyptis fruticosa, Hyptis pectinata <\/em>and Lippia gracilis <\/em>has been reported (Silva et al., <\/em>2008).<\/p>\n

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