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Articles 8581 - 8610 of 17829
Full-Text Articles in Entire DC Network
Upgrading Biogas Using Eburru Zeolitic Rocks And Other Adsorbent Materials To Remove Carbon Dioxide And Hydrogen Sulphide, James K Mbugua, Joseph M Mwaniki, Damaris M Nduta, Francis B Mwaura
Upgrading Biogas Using Eburru Zeolitic Rocks And Other Adsorbent Materials To Remove Carbon Dioxide And Hydrogen Sulphide, James K Mbugua, Joseph M Mwaniki, Damaris M Nduta, Francis B Mwaura
Tanzania Journal of Science
The trace amounts of carbon dioxide and hydrogen sulfide in raw biogas lower its calorific value,cause corrosion and make it hard to compress biogas into the cylinder. Raw biogas was obtainedfrom anaerobic digestion of cow dung and market wastes. The gas was stored in tubes or urine bagbefore upgrading. Natural zeolite rocks, maize cobs, steel wire, desulphurizer, and worn-out tyreswere used as the upgrade materials. The composition of biogas was recorded before and afterupgrading using a GP180 portable biogas analyzer from Henan, China. The measured level of rawbiogas was 0.0227% H2S, >20% CO2 and 52-56% CH4. The most efficient upgrade …
Larvicidal Potency Of Dioscorea Sansibarensis Leaf Extract Against Vector Mosquitoes: Anopheles Gambiae S.S. And Culex Quinquefasciatus, Anitha Philbert
Larvicidal Potency Of Dioscorea Sansibarensis Leaf Extract Against Vector Mosquitoes: Anopheles Gambiae S.S. And Culex Quinquefasciatus, Anitha Philbert
Tanzania Journal of Science
Mosquitoes are responsible for transmission of illnesses of public health importance including malaria, lymphatic filariasis, dengue, chikungunya, and many other diseases caused by viruses. Vector control using synthetic insecticides has been the cornerstone for management of vector-borne diseases. However, the chemical based interventions have not been sustainable due to emergency of resistance against insecticides among disease vectors. Plant based mosquitocidal products can be potential alternative tools in vector control. Therefore, the present study aimed at exploring the larvicidal properties of Dioscorea sansibarensis leaf extract against malaria and lymphatic filariasis vectors; Anopheles gambiae s.s. and Culex quinquefasciatus. The larvicidal activities of …
Determination Of 40k, 226ra And 228ra Concentrations With Dose Rates In Crayfish From Ode Omi River And Radiological Implications To The Consumers, Olusegun Sowole, Qasim Abolanle Adeniji, Muyideen O Olagunju
Determination Of 40k, 226ra And 228ra Concentrations With Dose Rates In Crayfish From Ode Omi River And Radiological Implications To The Consumers, Olusegun Sowole, Qasim Abolanle Adeniji, Muyideen O Olagunju
Tanzania Journal of Science
Natural radionuclides such as 40K, 226Ra and 228Ra are found naturally in water and sediments of rivers, likewise in soils. They are transferred to aquatic animals through ingestion. Radioactivity concentrations and dose rates of 40K, 226Ra and 228Ra in crayfish species from Ode Omi River in coastal region, Ogun State Southwest of Nigeria were determined by gamma spectrometry using NaI (TI) detector coupled with a pre-amplifier base to a multiple channel analyzer (MCA). 15 samples of crayfish were collected. Cherax tenuimanus had the highest mean concentration and dose rate of values 106.87 ± 9.11 Bq kg–1 and 0.00960 mGy hr–1 …
Probabilistic Seismic Hazard Assessment And Site Analyses Of Arusha International Conference Centre (Aicc), Arusha, Tanzania, Richard W Ferdinand
Probabilistic Seismic Hazard Assessment And Site Analyses Of Arusha International Conference Centre (Aicc), Arusha, Tanzania, Richard W Ferdinand
Tanzania Journal of Science
This work presents the evaluation of earthquake resistance of the Arusha International Conference Centre (AICC) complex, in Tanzania. The evaluation included probabilistic seismic hazard analysis (PSHA) and site response analysis. Seismic sources considered to constitute a seismic hazard in this study were randomly occurring seismicity located within five tectonic provinces around the site. For each province the seismic hazard is based on a cursory analysis of earthquake data from compiled ESARSWG bulletins and temporary deployed networks within the North Tanzania Divergence (NTD). Bedrock response signal together with the information of material characteristics from boreholes around the AICC site were used …
Hydrogeophysical Investigation For The Aquifers In Part Of Ilorin, Central Nigeria: Implication On Groundwater Prospect, Ayodele Kehinde Olawuyi
Hydrogeophysical Investigation For The Aquifers In Part Of Ilorin, Central Nigeria: Implication On Groundwater Prospect, Ayodele Kehinde Olawuyi
Tanzania Journal of Science
Hydrogeophysical study involving the use of Vertical Electrical Sounding (VES) was carried out in part of the basement complex rocks of Ilorin, central Nigeria, with the aim of determining its geoelectric parameters and groundwater potential. A total of thirty (30) VES were carried out using Schlumberger electrode configuration, with half electrode separation (AB/2) varying from 1m to 100m. Information on the subsurface lithologies, overburden thickness and aquiferous layers were obtained from the different VES locations in the study area. From the quantitative interpretations of the data collected, using the method of curve matching with the Orellana-Mooney master curves and 1-D …
Evaluation Of Petroleum Hydrocarbons Contamination In Soils And Groundwater Using Electrical Resistivity And Hydrochemical Methods-Case Study: Ayetoro, Osogbo Southwestern Nigeria, Mutiu A Fakunle, Muhydeen A Ibraheem, Wasiu B Agbaje, Luqman A Abidoye
Evaluation Of Petroleum Hydrocarbons Contamination In Soils And Groundwater Using Electrical Resistivity And Hydrochemical Methods-Case Study: Ayetoro, Osogbo Southwestern Nigeria, Mutiu A Fakunle, Muhydeen A Ibraheem, Wasiu B Agbaje, Luqman A Abidoye
Tanzania Journal of Science
The presence of Petroleum Hydrocarbons (PHCs) in hand-dug wells has become a concern to the residents of Ayetoro area, Osogbo. Consequently, the detection of PHCs was evaluated using, nine Vertical Electrical Soundings (VES) and 2D electrical resistivity tomography surveys. Soil samples collected were analyzed for porosity and permeability. Hand-dug well water samples were screened for PHCs. VES revealed that second layer had high apparent resistivity of 14415.0 Ωm, indicating presence of PHCs that had penetrated to maximum depth of 19.1 m. The highest resistivity of the control points was 48.0 Ωm, indicating absence of PHCs. The 2D resistivity revealed highest …
Effects Of Timber Harvest On Epigeous Fungal Fruiting Patterns And Community Structure In A Northern Hardwood Ecosystem, Benjamin W. Borgmann-Winter, Ryan B. Stephens, Anthony W. D'Amato, Serita D. Frey, Rebecca J. Rowe
Effects Of Timber Harvest On Epigeous Fungal Fruiting Patterns And Community Structure In A Northern Hardwood Ecosystem, Benjamin W. Borgmann-Winter, Ryan B. Stephens, Anthony W. D'Amato, Serita D. Frey, Rebecca J. Rowe
Faculty Publications
Epigeous fungal fruiting has important impacts on fungal reproduction and ecosystem function. Forest disturbances, such as timber harvest, impact moisture, host availability, and substrate availability, which in turn may drive changes in fungal fruiting patterns and community structure. We surveyed mushrooms in 0.4 ha patch cuts (18 months post-harvest) and adjacent intact hardwood forest in northern New Hampshire, USA, to document the effects of timber harvest on summer fruiting richness, biomass, diversity, and community structure of ectomycorrhizal, parasitic, and saprobic mushroom taxa. Fungal fruiting richness, diversity, and community heterogeneity were greater in intact forests than patch cuts. Among functional groups, …
The Effect Of Additives And Mixed Treatment On Red Clover Silage Quality, Lian Tao, Zhu Yu, Liying Han
The Effect Of Additives And Mixed Treatment On Red Clover Silage Quality, Lian Tao, Zhu Yu, Liying Han
IGC Proceedings (1977-2023)
No abstract provided.
Distribution Of Crude Fat For A Halophyte (Suaeda Glauca) Growing In The Songnen Grassland, H. X. Sun, Ch. L. Liu, Ch. Sh. L.
Distribution Of Crude Fat For A Halophyte (Suaeda Glauca) Growing In The Songnen Grassland, H. X. Sun, Ch. L. Liu, Ch. Sh. L.
IGC Proceedings (1977-2023)
No abstract provided.
Study On Different Silages Of Seed Production And Production Rice Staw, Jing Shui, Jinhua Zhang, Youmin Gan, Wuling Chen
Study On Different Silages Of Seed Production And Production Rice Staw, Jing Shui, Jinhua Zhang, Youmin Gan, Wuling Chen
IGC Proceedings (1977-2023)
No abstract provided.
Fermentation Quality Of Italian Ryegrass (Lolium Multiflorum Lam.) Silages Treated With Additives, Shao Tao, A. Y. Wen, Ji. Wang, L. Zhang, Ju. Wang, M. Shimojo, Y. Masuda
Fermentation Quality Of Italian Ryegrass (Lolium Multiflorum Lam.) Silages Treated With Additives, Shao Tao, A. Y. Wen, Ji. Wang, L. Zhang, Ju. Wang, M. Shimojo, Y. Masuda
IGC Proceedings (1977-2023)
No abstract provided.
Study On The Decreasing Lipid Activity Of Chicory Root Extracts And Inulin, Hongmei Shang, Tianming Hu, Youjun Lu, Yujie Lou
Study On The Decreasing Lipid Activity Of Chicory Root Extracts And Inulin, Hongmei Shang, Tianming Hu, Youjun Lu, Yujie Lou
IGC Proceedings (1977-2023)
No abstract provided.
Genetic Resources Of Halophytes And Their Utilization For Sustainable Development Of Russian Rangelands, Nariman Shamsutdinov
Genetic Resources Of Halophytes And Their Utilization For Sustainable Development Of Russian Rangelands, Nariman Shamsutdinov
IGC Proceedings (1977-2023)
No abstract provided.
Changes In Herbage Quality Of Two Grasses From Inner Mongolia Grassland During Growing Season, Anne Schiborra, M. Gierus, H. W. Wan, Y. F. Bai, Friedhelm Taube
Changes In Herbage Quality Of Two Grasses From Inner Mongolia Grassland During Growing Season, Anne Schiborra, M. Gierus, H. W. Wan, Y. F. Bai, Friedhelm Taube
IGC Proceedings (1977-2023)
No abstract provided.
Biochemical Aspect Of Grazing Behavior On Mediterranean Rangelands, J. Rogosic, J. Kezic
Biochemical Aspect Of Grazing Behavior On Mediterranean Rangelands, J. Rogosic, J. Kezic
IGC Proceedings (1977-2023)
No abstract provided.
Variation Of Plant Diversity And Feeding Value In Gurbantunggut Desert Grassland, Y. B. Qian, Z. N. Wu, L. Y. Zhang, H. Y. Zhang
Variation Of Plant Diversity And Feeding Value In Gurbantunggut Desert Grassland, Y. B. Qian, Z. N. Wu, L. Y. Zhang, H. Y. Zhang
IGC Proceedings (1977-2023)
No abstract provided.
Fermentation Quality Of Tmr Silage With Green Tea Grounds Ensiled In Flexible Container Bag Silo, Ramli Mohd Noor, Yimin Cai, Ryuichi Uegaki, Hiroki Matsuyama, Chuncheng Xu, Norio Yoshida, Yasushi Tando, Tatsuo Miwa
Fermentation Quality Of Tmr Silage With Green Tea Grounds Ensiled In Flexible Container Bag Silo, Ramli Mohd Noor, Yimin Cai, Ryuichi Uegaki, Hiroki Matsuyama, Chuncheng Xu, Norio Yoshida, Yasushi Tando, Tatsuo Miwa
IGC Proceedings (1977-2023)
No abstract provided.
Voluntary Intake By Cattle Consuming Forage From Grasslands Of Different Quality, Jan Pozdíšek, A. Kohoutek, O. Látal, M. Svozilová, M. Štýbnarová
Voluntary Intake By Cattle Consuming Forage From Grasslands Of Different Quality, Jan Pozdíšek, A. Kohoutek, O. Látal, M. Svozilová, M. Štýbnarová
IGC Proceedings (1977-2023)
No abstract provided.
Effect Of Biological Additives On Fermentation And Nutritive Value Of Silage, Andres Olt, H. Kaldmäe, E. Songisepp, O. Kärt
Effect Of Biological Additives On Fermentation And Nutritive Value Of Silage, Andres Olt, H. Kaldmäe, E. Songisepp, O. Kärt
IGC Proceedings (1977-2023)
No abstract provided.
Persistence Of Chamaecrista Rotundifolia (Wynn) In Panicum Maximum (Ntchisi) Under Varying Spacing And Legume Planting Methods, Jimoh A. Olanite, Alaba O. Jolaosho, O. M. Arigbede, Olufemi S. Onifade, U. Y. Anele
Persistence Of Chamaecrista Rotundifolia (Wynn) In Panicum Maximum (Ntchisi) Under Varying Spacing And Legume Planting Methods, Jimoh A. Olanite, Alaba O. Jolaosho, O. M. Arigbede, Olufemi S. Onifade, U. Y. Anele
IGC Proceedings (1977-2023)
No abstract provided.
Nutritional Characterisation Of Vigna Unguiculata As Alternative Protein Source For Monogastric Animals, L. S. Muñoz, P. Sarria, Siriwan Martens, M. Peters, P. A. Aguirre, C. A. Montoya
Nutritional Characterisation Of Vigna Unguiculata As Alternative Protein Source For Monogastric Animals, L. S. Muñoz, P. Sarria, Siriwan Martens, M. Peters, P. A. Aguirre, C. A. Montoya
IGC Proceedings (1977-2023)
No abstract provided.
Atmospheric Blocking Drives Recent Albedo Change Across The Western Greenland Ice Sheet Percolation Zone, Hans Peter Marshall, Tate Meehan
Atmospheric Blocking Drives Recent Albedo Change Across The Western Greenland Ice Sheet Percolation Zone, Hans Peter Marshall, Tate Meehan
Geosciences Faculty Publications and Presentations
Greenland Ice Sheet (GrIS) albedo has decreased over recent decades, contributing to enhanced surface melt and mass loss. However, it remains unclear whether GrIS darkening is due to snow grain size increases, higher concentrations of light-absorbing impurities (LAIs), or a combination. Here, we assess albedo controls in the western GrIS percolation zone using in situ albedo, LAI, and grain size measurements. We find a significant correlation between albedo and snow grain size (p < 0.01), but not with LAIs. Modeling corroborates that LAI concentrations are too low to significantly reduce albedo, but larger grain sizes could reduce albedo by at least ∼3%. Strong atmospheric blocking increases grain sizes and reduces albedo through increased surface temperature, fewer storms, and higher incoming shortwave radiation. These findings clarify the mechanisms by which anomalously strong blocking contributed to recent GrIS albedo decline and mass loss, highlighting the importance of improving projections of future blocking.
Late Cretaceous Dinosaur Tracks From The Iron Springs Formation, Iron County, Utah, Jennifer K. Crowell, Grant T. Shimer
Late Cretaceous Dinosaur Tracks From The Iron Springs Formation, Iron County, Utah, Jennifer K. Crowell, Grant T. Shimer
The Compass: Earth Science Journal of Sigma Gamma Epsilon
Located in Iron County, Utah, the Parowan Gap dinosaur track site contains over one hundred natural casts of non-avian dinosaur tracks preserved in sandstones and siltstones of the Late Cretaceous (≈83 Ma) Iron Springs Formation. For this study, the authors returned to the area to survey for and describe previously unidentified tracks. Many tracks from this new study occur as in situ casts found on the basal surfaces of sandstones deposited by braided and meandering rivers on the coastal plain of the Western Interior Seaway, with some specimens from fallen talus blocks. Over the course of two years, the research …
The Research On The Sodium Bicarbonate Solution Cures The Ryegrass Hay, Zhilan Mu
The Research On The Sodium Bicarbonate Solution Cures The Ryegrass Hay, Zhilan Mu
IGC Proceedings (1977-2023)
No abstract provided.
The Application Of Near Infrared Reflectance Spectroscopy In Nutrient Ingredient Determination Of Silage Maize, H. B. Mu, Xiangyang Hou, F. G. Mi
The Application Of Near Infrared Reflectance Spectroscopy In Nutrient Ingredient Determination Of Silage Maize, H. B. Mu, Xiangyang Hou, F. G. Mi
IGC Proceedings (1977-2023)
No abstract provided.
Investigation On Effects Of Phenological Stages And Species On Forage Quality Of Rangelands (Iran), Marzieh Mosayyebi, Hossein Arzani, Mohsen Maleki
Investigation On Effects Of Phenological Stages And Species On Forage Quality Of Rangelands (Iran), Marzieh Mosayyebi, Hossein Arzani, Mohsen Maleki
IGC Proceedings (1977-2023)
No abstract provided.
Silage Making By Smallholder Dairy Farmers In Kenya: Potential And Constraints Of Small Bag Silage, J. N. Methu, David Miano Mwangi, L. Karienye
Silage Making By Smallholder Dairy Farmers In Kenya: Potential And Constraints Of Small Bag Silage, J. N. Methu, David Miano Mwangi, L. Karienye
IGC Proceedings (1977-2023)
No abstract provided.
Influence Of Nitrogen In The Anatomical Characteristics And Yield Of Tropical Grasses, L. T. Medeiros, José C. Pinto, E. M. De Castro, A. V. De Rezende, C. A. Lima, M. S. Sugawara
Influence Of Nitrogen In The Anatomical Characteristics And Yield Of Tropical Grasses, L. T. Medeiros, José C. Pinto, E. M. De Castro, A. V. De Rezende, C. A. Lima, M. S. Sugawara
IGC Proceedings (1977-2023)
No abstract provided.
Forage Quality In Some Species Of Mountainous Rangelands (Iran), Mohsen Maleki, H. Arzani, Marzieh Mosayyebi
Forage Quality In Some Species Of Mountainous Rangelands (Iran), Mohsen Maleki, H. Arzani, Marzieh Mosayyebi
IGC Proceedings (1977-2023)
No abstract provided.
The Impact Of Burning On The Structure And Mineral Composition Of Bat Guano, Joyce Lundberg, Donald A. Mcfarlane
The Impact Of Burning On The Structure And Mineral Composition Of Bat Guano, Joyce Lundberg, Donald A. Mcfarlane
International Journal of Speleology
Here we addressed the question of whether burning of guano produces a characteristic suite of morphological changes and/or unique mineralogical products. The changes observed in our experimental burning of guano (both fresh and decayed) included colour change (blackening), grain size and morphological change (grain size generally reduced, morphology rendered generally less distinct), alteration of minerals by dehydration (e.g., gypsum to anhydrite, brushite to whitlockite), and production of new minerals or compounds (e.g., augelite, bayerite, giniite, graphite, oldhamite, strontium apatite, tridymite). The key morphological feature we found that may be diagnostic of burning was severe damage to crystals from rapid dehydration …