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Search Results: 1 - 10 of 191169 matches for " D. Kamoga "
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Bio-Prospective Studies on Medicinal Plants Used to Manage Poultry Diseases in the Mount Elgon Region of Uganda
D. Olila,R. Bukenya-Ziraba,D. Kamoga
Research Journal of Pharmacology , 2013,
Abstract: The need to utilise drugs and pesticides from local plants is increasingly becoming more important, not only because of the high cost of imported chemicals and drugs, but the availability of these imported drugs has become erratic as their importation has to compete for the meagre foreign exchange with other vital imports required for industrial and social development. In the mount Elgon region of Uganda, plants are often used for treatment of poultry infections. The most highly ranked were: Kedrostis foetidisma (Namusisi), Tithonia diversifolia (Nabululu), Cannabis sativa(Nzaye), Jatropha carcus(Lisanda), Capsicum frutescens (Pilipili), Aloe sp. (Kukatyakatya), Kigelia africana (Kifungu), Albizia coriaria(Kiluku) and Oxygonum simatum (Namakumba). Six methanol extracts showed antibacterial activity against Staphylococcus aureus:Erythrina abysinicca, Tephrosia vogelii; Threehad activity against Pseudomonas aeruginosa: Cannabis sativa, Stephania abysinica, Albizia conari and 12 had activity against Bacillus subtilis: Cannabis sativa, Capsicum frutescens, Lantana camara, Jatropha carcus, Stephania abysinnica, Dracenea steudneri, Albizia conaria, Tephrosia vogelii, Aloe sp., Erythrina abysinicca, Oxygonum sinuatum, Azadirachta indica; four methanol extracts had activity against E. coli: Oxygonum sinuatum, Stephania abysinnica, Albizia conaria, Tephrosia vogelii; 7 plants (methanol extracts) had no demonstrable antibacterial activity: Mormodica foetida, Vernonia amygdalina, Cassia occidentalis, Ficus asperifolia, Spilanthes mauritiana, Agave sisalana, Cornyza sumatrensis. Two plant extracts (methanol)were considered to have broad spectrumactivity: Stephania abyssinica, Albizia coraria. Of the petroleum etherextractsonly one plant showed activity against Staphylococcus aureus: Erythrina abysinicca. One plant also had activity against Pseudomonas aeruginosa: Draceania steudner. For Bacillus subtilis 14 plants had activity: Capsicum frutescens, Ficus asperlifolia, Spilanthes mauritiana, Cassia occidentalis, Melia azaderach, Erythrina abysinica, Agave sisalana, Azadirachta indica Aloe sp. Kigelia africana Kedrosis foetidisma Tithonia diversifolia Aloe spp, Oxygonum sinuatum; Only one plant(Oxygonum sinuatum) had activity against E. coli. Eight of the plants (pet ether extracts) had no demonstrable antibacterial activity: Cornyza sumatrensis, Moringa oleifera, Kigelia africana, Albizia conaria, Jatropha carcus, Lantana camara, Verninia amygdalina, Mormodica foetida. Erythrina abysinicca (pet-ether extracts) had a broad spectrum of activity.
Ethno-Veterinary Medicinal Plants of the Lake Victoria Basin: A Bioprospection
F. Ejobi,R.D.Mosha,S. Ndege,D. Kamoga
Journal of Animal and Veterinary Advances , 2012,
Abstract: The main objective of this study was to identify and document plants traditionally used for treating livestock diseases and conditions in Lake Victoria basin of Kenya, Tanzania and Uganda. In Kenya, the study sites were located in Kendu Bay, Kano Plains, Suri and Yala wetlands; in Tanzania in the districts of Missungi, Magu, Sengerma, Geita, Ukerewe and Ilemela, while in Uganda in the district of Rakai. The study utilised employed participatory rural appraisal tools, mainly focus group discussions and key informant interviews. A wide range of plants with veterinary medicinal uses were identified and documented. The highest number of plants was enlisted in Kenya (81), followed by Tanzania (50) and lastly Uganda (24). Examples of plants mentioned were Xylopia aethiopica for treating East Coast Fever, Phragmites mauritianus for treating retained placenta, Hoslundia opposita for treating snake bites and Cassia occidentalis for treating internal parasites. Some plants were common in all the three countries, while others were only mentioned in particular countries. Other livestock diseases and conditions traditionally treated included diarrhoea, pneumonia, eye infections, heart water, babesiosis, mastitis, snake bites and wounds. The study points out the need for validating and integrating the use of traditional medicinal plants in community-based animal health care delivery systems in the East African region.
A Review on Pulp Manufacture from Non Wood Plant Materials
Kamoga Omar Lwako M.
International Journal of Chemical Engineering and Applications , 2013, DOI: 10.7763/ijcea.2013.v4.281
Abstract: There has been a cyclic trend in the production of pulp and paper, alternating between the non-wood and the wood materials. Originally paper wasbeing made from nonwood materials such as papyrus, hemp and textile rags. With the development of technologies for isolating pulp from wood, it resulted in abandoning paper making from many non-wood materials. Since then, it has been cheaper to produce pulp and paper from wood. However, todate the trend is reversing from wood as the major source of pulp for paper making to nonwood materials such as agricultural food crop residues, grasses, shed tree leaves, fibrous shells of fruits and others. This is due to the fact that the supply of wood for pulp is decreasing as a result of deforestation in most part of world, more especially in Uganda while the non-wood materials are more available and can readily be regenerated after a short period.In this paper we have reviewed the trend in pulp and paper production from different non-wood materials since the perception of the paper making technology up todate through literature review and consultations with experts in the area pulp and paper production.
Electrical Conductivity of Collapsed Multilayer Graphene Tubes  [PDF]
D. Mendoza
World Journal of Nano Science and Engineering (WJNSE) , 2012, DOI: 10.4236/wjnse.2012.22009
Abstract: Synthesis of multilayer graphene on copper wires by a chemical vapor deposition method is reported. After copper etching, the multilayer tube collapses forming stripes of graphitic films, their electrical conductance as a function of temperature indicate a semiconductor-like behavior. Using the multilayer graphene stripes, a cross junction is built and owing to its electrical behavior we propose that a tunneling process exists in the device.
Porous Carbon Grown by Chemical Vapor Deposition on Copper Substrates  [PDF]
D. Mendoza
Journal of Materials Science and Chemical Engineering (MSCE) , 2015, DOI: 10.4236/msce.2015.38003
Abstract: Amorphous porous carbon was synthesized by chemical vapor deposition on copper substrates. The average size of the pores is around 1.2 microns with some small pores decorating the big ones. Lamellar samples of this carbonaceous material can be separated from the copper support and may be useful as electrode due to its low electrical resistivity of the order of 0.4 Ωcm.
Application of Enzyme Extracted from Aloe vera Plant in Chemical Pretreatment of Cotton Knitted Textile to Reduce Pollution Load  [PDF]
D. Jothi
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.33B007

Nowadays, highly alkaline chemicals like caustic soda, soda ash, silicate, acetic acid and soaping agents are used for scouring to remove the non-cellulosic impurities from the cotton. Using 30 - 40 gm/Kg on weight of the fabric results in destruction of cotton structure. Intensive rinsing and more acid is needed for reutilization of cotton, which enlarges the volume of effluent. Furthermore, these hazards chemicals result in increase in COD, BOD and TDS in waste water. These chemicals also attack the cellulose leading to heavy strength loss and weight loss in the fabric. The net result is low quality control and polluted environment with high usage of energy, time, chemical and water. Aloe vera presents the finest commercial opportunity in various industrial sectors among the various plants. Also, most of the countries are gifted with the unique geographical features that are essential for cultivation of Aloe vera. Yet, none of the country has realized and reaped the full potential of such plants in various industrial applications. The reason is simple: lack of the requisite expertise in extraction of various enzymes present in aloe plant. Fortunately, the technology is now accessible to make use of enzyme in textile application. In this research an attempt has been made to make use of lipase enzyme extracted from aloe plant in textile chemical pre- treatment process. In the present research work, an attempt was made to develop bio scouring of 100% cotton knitted fabric with lipase enzyme extracted from Aloe deberena plant at various concentration (1%, 2% and 3%) at various temperature (40?C, 60?C and 70?C) for a period of 30 minutes, 60 minutes and 90 minutes. The properties of bio scoured fabrics are compared with these of conventional scoured one. Encouraging results in terms of dye uptake, dye levelness, wash fastness, light fastness and rubbing fastness are obtained in case of bio scouring fabric dyed with dark reactive colors. Further, it reduces volume of effluent as well as COD, TDS and pH. It saves a substantial thermal energy 50% and electrical energy 40%. Bio scouring waste water has 40% - 50% less COD and 60% less TDS as compared to conventional scouring waste water.

Hyporheic Zone Hydrochemistry of the Mine-Polluted River  [PDF]
D. Ciszewski
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.310008

Intensity of stream waters mixing with groundwaters and lateral extent of these processes in the hyporheic zone were investigated in a near-bank sandbar and an adjacent floodplain through the comparison of groundwaters and stream water chemistry of the Bia?a Przemsza River in southern Poland. The stream waters were polluted by the discharge of mine waters from “Boles?aw” lead and zinc mine. The investigated waters were several times more mineralized than the natural spring waters of the river valley. The concentration of: potassium, sodium, and the pH, as well as cadmium, lead, and zinc decreased in the hyporheic zone towards the stream bank, whereas conductance, calcium, magnesium, sulphates, as well as silica contents were the highest on the floodplain, diminishing towards the stream. The changes observed in the chemical composition of groundwaters were apparent in mixing stream waters below the depth of 2 m with shallow groundwaters draining the valley slope. Hyporheic mixing also takes place in the 10-meter-wide, marginal zone of the sandbar, whereas in the 5-meter-wide stream-side zone of the sandbar groundwaters represent weakly transformed stream water.

Fractional Topological Insulators—A Bosonization Approach  [PDF]
D. Schmeltzer
Journal of Modern Physics (JMP) , 2016, DOI: 10.4236/jmp.2016.71012
Abstract: A metallic disk with strong spin orbit interaction is investigated. The finite disk geometry introduces a confining potential. Due to the strong spin-orbit interaction and confining potential the metal disk is described by an effective one-dimensional model with a harmonic potential. The harmonic potential gives rise to classical turning points. As a result, open boundary conditions must be used. We bosonize the model and obtain chiral Bosons for each spin on the edge of the disk. When the filling fraction is reduced to \"\" the electron-electron interactions are studied by using the Jordan Wigner phase for composite fermions which give rise to a Luttinger liquid. When the metallic disk is in the proximity with a superconductor, a Fractional Topological Insulator is obtained. An experimental realization is proposed. We show that by tunning the chemical potential we control the classical turning points for which a Fractional Topological Insulator is realized.
An Analysis of Modified Emden-Type Equation ẍ + αxẋ + βx3 = 0: Exact Explicit Analytical Solution, Lagrangian, Hamiltonian for Arbitrary Values of α and β  [PDF]
D. Biswas
Natural Science (NS) , 2019, DOI: 10.4236/ns.2019.111002
Abstract: The modified Emden-type is being investigated by mathematicians as well as physicists for about a century. However, there exist no exact explicit solution of this equation, ẍ + αxẋ + βx3 = 0 for arbitrary values of α and β. In this work, the exact analytical explicit solution of modified Emden-type (MEE) equation is derived for arbitrary values of α and β. The Lagrangian and Hamiltonian of MEE are also worked out. The solution is also utilized to find exact explicit analytical solution of Force-free Duffing oscillator-type equation. And exact explicit analytical solution of two-dimensional Lotka-Volterra System is also worked out.
Utilizing Dimensional Analysis with Observed Data to Determine the Significance of Hydrodynamic Solutions in Coastal Hydrology  [PDF]
Eric D. Swain, Jeremy D. Decker, Joseph D. Hughes
Computational Water, Energy, and Environmental Engineering (CWEEE) , 2014, DOI: 10.4236/cweee.2014.32008

In this paper, the authors present an analysis of the magnitude of the temporal and spatial acceleration (inertial) terms in the surface-water flow equations and determine the conditions under which these inertial terms have sufficient magnitude to be required in the computations. Data from two South Florida field sites are examined and the relative magnitudes of temporal acceleration, spatial acceleration, and the gravity and friction terms are compared. Parameters are derived by using dimensionless numbers and applied to quantify the significance of the hydrodynamic effects. The time series of the ratio of the inertial and gravity terms from field sites are presented and compared with both a simplified indicator parameter and a more complex parameter called the Hydrodynamic Significance Number (HSN). Two test-case models were developed by using the SWIFT2D hydrodynamic simulator to examine flow behavior with and without the inertial terms and compute the HSN. The first model represented one of the previously-mentioned field sites during gate operations of a structure-managed coastal canal. The second model was a synthetic test case illustrating the drainage of water down a sloped surface from an initial stage while under constant flow. The analyses indicate that the times of substantial hydrodynamic effects are sporadic but significant. The simplified indicator parameter correlates much better with the hydrodynamic effect magnitude for a constant width channel such as Miami Canal than at the non-uniform North River. Higher HSN values indicate flow situations where the inertial terms are large and need to be taken into account.

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