Browsing Department of Chemistry by Title
Now showing items 92-111 of 323
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Effects of copper exchange levels on complexation of ammonia in Cu (II)-exchanged X zeolite
(Sabinet, 2010-01-01)Copper (II)-exchanged faujasite-X zeolites at various loadings of copper per unit cell of zeolites were prepared and then exposed to ammonia. The copper ammine complexes of the various copper levels per unit cell were ... -
Effects of copper exchange levels on complexation of ammonia in Cu (II)-exchanged X zeolite
(Sabinet, 2010-01-01)Copper (II)-exchanged faujasite-X zeolites at various loadings of copper per unit cell of zeolites were prepared and then exposed to ammonia. The copper ammine complexes of the various copper levels per unit cell were ... -
Effects of copper exchange levels on complexation of ammonia in Cu (II)-exchanged X zeolite
(The South African Chemical Institute, 2010)Copper (II)-exchanged faujasite-X zeolites at various loadings of copper per unit cell of zeolites were prepared and then exposed to ammonia. The copper ammine complexes of the various copper levels per unit cell were ... -
Effects of cropping systems and agricultural lime on soil properties and nutrient content of sugarcane on acidified soils of Kisumu County, Kenya
(American Journal of Agriculture and Forestry, 2016-07-23)Acid soils cause soil fertility problems such as Al and Mn toxicity, Ca, Mg, N deficiency and P fixation. These are constraints to high crop yields. Historically, liming is the common management practice used to neutralize ... -
Effects of cropping systems, lime placement methods and rates on sugarcane yields and quality under acidified soils of Kibos, Kenya
(2016)International Journal of Plant and Soil Science -
Effects of faujasite X and Y zeolites on the 1, 1, 1-trichloro-2, 2’bis (p-chlorophenyl) ethane (DDT) degradation during water purification
(2013)The ability of zeolites to abstract and denature organochloride pesticides finds application in water purification practices. In this study, activated faujasite X and Y zeolites were separately exposed to 1, 2 and 4 ... -
Effects of fertilisers on tea yields and quality: A review with special reference to Africa and Sri Lanka.
(Tea Research Foundation of Kenya, 2001)Introduction the increase in world demand, consequently tea Camellia sinensis L. 0 . Kuntze plants are commercially grown under different climatic conditions with latitudes ranging from 49' N (Outer Carpathians) to 33' S ... -
Effects of genotype, environment and management on yields and quality of black tea Authors
(Springer Netherlands, 2011)The tea beverages processed from the young tender shoots of Camellia sinensis (L.) O. Kuntze, are claimed to be the most widely consumed fluids after water. The tea plant originates from the point of confluence of ... -
Effects of Geographical Area of Production on the Composition of the Volatile Flavour Compounds in Kenyan Clonal Black CTC Teas
(Cambridge University Press, 1988-04)The contents of the volatile flavour compounds and the flavour index of black teas vary with localities. The magnitude and order of the variations are clonally dependent, the relative performance of clones varying with ... -
Effects of land use change on land degradation reflected by soil properties along Mara River, Kenya and Tanzania
(Scientific Research Publishing, 2015-01-01)Human-induced changes to natural landscapes have been identified as some of the greatest threats to freshwater resources. The change from natural forest cover to agricultural and pastoral activities is rampant especially ... -
Effects of lime and nitrogen on properties of an acidic soil and nutrient content of sugarcane under sugarcane – soybean intercropping in Kenya
(2016)American Journal of Experimental Agriculture -
Effects of location of production, fertilizer rates and plucking intervals on mature leaf nutrients of clone TRFK 6/8 in East Africa.
(Tea Research Foundation of Kenya, 2011)Mature tea leaf has been adopted in East Africa for nutrients diagnosis to guide remedial applications of nutrients and cushion the plants from possible deficiencies that would affect yields and quality. Although it ... -
Effects of long term fertilizer use on a high yielding tea clone S15/10: Soil pH, mature leaf nitrogen, mature leaf and soil phosphorus and potassium
(CABI, 2011)Harvesting (plucking) the young tender shoots of Camellia sinensis (L.) O. Kuntze to make tea beverages results in removal of high amounts nutrients from the soil. AHPS15/10 is a high-yielding tea clone with average annual ... -
The effects of metakaolinization and fused-metakaolinization on zeolites synthesized from quartz rich natural clays
(Elsevier, 2019-12-01)A variety of zeolites have been synthesized by performing either metakaolinization or fused-metakaolinization of natural clays prior to the hydrothermal synthesis step. To understand the differences arising from performing ... -
Effects of Micronutrients on the Nutritional Status of Clonal Tea Replanted in Areas Where Old Tea Was Uprooted
(Journal of Tea Science Research, 2017-03-20)Tea yields peak is 21-30 years after which yields decline. The declining productivity and moribuncy has been reported in many tea fields due to prolonged period of monoculture under tea, physicochemical and biological ... -
Effects of nitrogenous fertilizer rates, plucking intervals and location of production on the micronutrient levels of clonal black tea.
(International Society of Tea Science, 2014)Micronutrients are important to both animal and plant life. In plants, the levels can vary widely due to biotic and abiotic factors. Tea is widely grown and its beverages are claimed to be the most widely consumed ... -
Effects of pH and metal ions on oxytetracycline sorption to maize-straw-derived biochar
(Elsevier, 2013-05-30)Biochars produced from biomass residues have been recognized as effective sorbents to hydrophobic compounds, but knowledge on sorption of antibiotics to biochar and its mechanisms are still inadequate. Sorption of ...