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Search Results: 1 - 10 of 358786 matches for " Y.S. Mtui Godliving "
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Physicochemical and Microbiological Water Quality of Lake Sagara in Malagarasi Wetlands
Y.S. Mtui Godliving,Yoshitoshi Nakamura
Journal of Engineering and Applied Sciences , 2012,
Abstract: The physicochemical and microbiological water quality parameters of Lake Sagara in the Malagarasi ecosystem, Tanzania, were studied between September 2003 and January 2004. Standard methods of analysis were used to elucidate the levels of the main water quality parameters. The Lake was found to be shallow (maximum depth 6.5 m) with encroaching hydrophytes and floodplain grasslands. High turbidity values ranging from 20-126.5 NTU recorded in the studied sites was attributed to vigorous wind mixing of the Lake water. The temperature, pH and chlorides values were 24.4-27.0 C, 6.8-8.8, 7.9-17.4 mg L-1), respectively. These values are within the standard water quality requirements. The values of conductivity (89-212 ìs/cm), phosphates (1.0-4.5 mg L-1), organic nitrogen (0.8-2.2 mg L-1); abundant sediments and algal blooms suggest that Lake Sagara is eutrophic. Values of dissolved oxygen (6.2-7.3 mg L-1), COD (22.1-42.6 mg L-1) and BOD (3.8-7.1 mg L-1) show that so far, the levels of oxygen-demanding wastes in Lake Sagara can still sustain aquatic life. The high counts of enteric pathogenic microorganisms including fecal coiliform (10-66 MPN/100m), Vibrio sp. (2-6 CFU mL-1) and Salmonella sp. (1-4 CFU mL-1) as a result of surface runoff and direct contamination depict poor hygienic practices by the local fishermen and the surrounding communities. This work provides the first ever scientific research on the microbiological status of Malagarasi-Muyovozi wetland ecosystem.
Characteristics of Soil in Environment Friendly Rice-wheat Cropping System in Southern Korea
Y.S. Cho
Pakistan Journal of Biological Sciences , 2002,
Abstract: A field experiment was conducted to compare soil microbial populations, microbial-N status and soil physical and chemical characteristics in a no-till, unfertilized, direct-sown, wheat-rice, relay-cropping system (NTWR) and also in a conventional transplanted rice single cropping system (CTR). The wheat-rice system was imposed for 2, 4 and 7 years to identify the time course responses in the soil and crop. Recycling of crop residues in the wheat-rice cropping system generally increased the soil organic matter (OM) contents but reduced the level of available P2O5 compared with the conventional system. Generally the soil was fertile with a high initial organic matter contents. Organic matter was increased by 30% during the 7 years of wheat-rice cropping. Other soil physical features, bulk density and permeability to air and water indicated that soil structure could be improved in response to wheat-rice cropping. Seasonal variability of soil microorganisms suggested that 7-year cropping could improve soil physicochemical characteristics but mineral contents in relation to cation exchange capacity (CEC) would decrease after 4-years cropping. Soil tillage may adversely affect soil microbial dynamics. In conclusion, a no-till, unfertilized, direct-sown, wheat-rice cropping system, is likely to sustain grain yield by improving soil bio-physicochemical factors and is one of the most ecologically stable, economically sound and socially supportive wheat-rice production systems.
Presidential Address - Y.S. AHLAWAT
Indian Phytopathology , 2011,
No-till, Legume-rice Farming Systems in Korea and Japan
Y.S. Cho
Asian Journal of Plant Sciences , 2003,
Abstract: Conventional rice production yields high amounts of grain, but at considerable economic and environmental costs. The production of safe food and improvement of environmental conditions are the latest major themes in Korean and Japanese agriculture. A low-input, sustainable or organic based system that improves or maintains the natural environment should be developed for the benefit of both farmers and consumers.
Low Temperature Electrical Transport in Double Layered CMR Manganite La1.2Sr1.4Ba0.4Mn2O7  [PDF]
Y.S. Reddy, P. Kistaiah, C. Vishnuvardhan Reddy
Advances in Materials Physics and Chemistry (AMPC) , 2012, DOI: 10.4236/ampc.2012.24B014
Abstract: The electrical transport behavior and magnetoresistance (MR) of a polycrystalline double layered manganite La1.2Sr1.4Ba0.4Mn2O7, synthesized by the sol-gel method, are investigated in the temperature range 4.2 K - 300 K. The sample exhibits an insulator-to-metal transition at 87 K (TIM) and the spin-glass (SG)-like behavior is observed below 50 K (TSG). The transport behavior is analyzed in the entire temperature range considering three different regions: paramagnetic insulating region (T>TIM), ferromagnetic metallic region (TSG < T < TIM) and antiferromagnetic insulating region (TSG) by fitting the temperature dependent resistivity data to the equations governing the conduction process in the respective temperature regions. The results show that the conduction at T>TIM follows Mott variable range hopping (VRH) process, while the two-magnon scattering process is evidenced at TSG < T < TIM which is suppressed with the applied magnetic field of 4 T. The low temperature conductivity data are also fitted with Mott VRH equation. The sample exhibits a large MR (≈45%) over a temperature range     5 K – 50 K and it shows ≈32% MR at 5 K with a magnetic field of 0.5 T.
地质学报 , 1948,
Abstract: TheMuchiapa-Sintsi~1area,occupiedmostlybythecrystallinerocksofpre-Sinianage,liestotheSWofthecityofHanchung(Nanchenghsien)~2andalongthenorthernslopeoftheTapashanMountains.Itcoverspractical-
Designing of Sixlink Mechanism Schemes with the Changeable Contour Taking into Account Forces Transfer
Y.S. Temirbekov,S. Baimukhanov
Lecture Notes in Engineering and Computer Science , 2011,
Use of Date Palm Leaves Compost as A Substitution to Peatmoss
Y.S.S. Ali
American Journal of Plant Physiology , 2008,
Abstract: The main objective of this study was to prepare compost using local farm resources such as Date Palm Leaves (DPL) and compare it with the imported peatmoss on seed germination, rate of germination and growth of ornamental plants. The results showed that total number of seeds germinated, rate of seed germination, plant height, number of leaves per plant and the dry-biomass per plant was better in the Date Palm Leaves Compost (DPLC) relative to the peat moss. Based on the preliminary results, it is concluded that farming community and the various research organizations should be encouraged to develop technology for the preparation of composts using local farm wastes resources such as date palm leaves and Phragmites australis rather than importing more expansive peat moss.
Cryptographic System For Fingerprint Image Using Chaotic Sequence Generator
International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering , 2013,
Abstract: Here we are going to achieve secure for the finger print images by using symmetric method. This symmetric finger print image encryption is a combination of scrambling and confusion process. It also include the chaotic map in which scrambling will be used to identify address of the finger print image pixels, and bit -level permutation is used for confusion process so it will enhance the security. Encryption scheme possesses large key space to resist brute force attack, malicious attack like cropping, noising and possesses good statistical properties to frustrate statistical analysis attacks.
Influence of soil factors on population dynamics of bioagent -Trichoderma harzianum
Indian Phytopathology , 2011,
Abstract: Population dynamics of Trichoderma harzianum (JMA-4), the best identified isolate against pea root rotJ wilt complex was studied at different moisture, temperature and pH levels up to 60th day of inoculation. The maximum population (71.0x 106 cfu/g soil) was noticed at 35 per cent followed by 30 per cent moisture.
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