Browsing by Author "Wijesundara, K."

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Developing an Effective Specific Gravity Measuring System for Solid Tyre Manufacturing Process
    (Uva Wellassa University of Sri Lanka, 2020) Palliyage, R.P.; Withanage, N.S.; Wijesundara, K.
    Solid tyres are non-pneumatic tyres which are not filled with air. It consists of major three layers such as heel, cushion, and tread. The main steps of the solid tyre manufacturing process are compound warming, compound feeding, tyre rolling, curing, and final inspection. During compound warming, the specific gravity of the warmed compound is tested. According to that value, the required mass of compound for tyre is measured. Then It is transferred to the feeding mill and after that, it is transferred to tyre rolling. In the solid tyre manufacturing process, the specific gravity of the warmed compound should be measured before the tyre rolling. The current production process takes a total of 7 min for measuring specific gravity, which is higher than tyre rolling time. So, the current specific gravity measuring system is un-effective for the process. If the weight will be less than the required amount, tyre can be scrapped. It leads to economic losses to the company. Therefore, minimizing the total time for specific gravity measuring is important to increase productivity. In this research, eight types of experiments were designed to find the optimum time for a specific gravity measuring process. In each experiment major four parameters were considered, such as curing temperature, curing time, cooling water temperature, and cooling time. In this experiments three different curing temperatures (180 ⁰C, 190 ⁰C, 200 ⁰C), two different curing times (2, 3 min), two different cooling water temperatures (30 ⁰C, <10 ⁰C) and five different cooling times (0, 1, 2, 3, 4 min) were used to test the specific gravity of the compound samples under 8 different experiments. The results revealed that the optimum curing temperature is 190 ⁰C, curing time is 2 min., cooling time is 2 min., and the cooling water temperature is <10 ⁰C. The total time takes by specific gravity measuring could be minimized to 4 min. It would be profitable for the company in many ways compared to the current 7 min operation. Keywords: Cooling time, Curing time, Curing temperature, Specific gravity, Tyre manufacturing
  • No Thumbnail Available
    Item
    Prevalence of Gastrointestinal Parasites in Cattle in Badulla District(With special Reference to Cryptosporidium spp)
    (Uva Wellassa University of Sri Lanka, 2010) Fernando, T.S.R.; Rajapakshe, R.P.V.J.; Bullumulla, P.B.A.I.K.; Wijesundara, K.
    Due to the recognition of subclinical infections with negative impacts on production as diseases, control of gastrointestinal (GI) parasites in cattle is becoming established. Cryptosporidiosis is a gastrointestinal zoonotic disease and there is no effective therapy for this disease. This study examines prevalence of gastrointestinal parasites in Badulla district including Cryptosporidium spp and identifies the significance of age, water source and feeding pattern for the prevalence of Cryptosporidium in cattle. The prevalence of gastrointestinal parasites including Cryptosporidium in faeces of 250 cattle in three age categories was examined. The eggs of gastrointestinal parasites were identified using the Mc Master method. Larval culture was done to identify the Genera of parasites. Qa Oocysts of Cryptosporidium were demonstrated using the Shearther's sucrose flotation method followed by staining with modified Ziehl Neelsen echnique. Prevalence of gastrointestinal parasites and Cryptosporidium in Badulla district was 57.20% and 15.20% respectively. Trichostrongyl spp, Haemonchus spp, Strongyloid spp, Toxocara spp, Trichuris spp, Moneiza spp, Eimeria spp were the common gastrointestinal parasites in cattle in Badulla district. Prevalence of Cryptosporidium is significantly higher in cattle of <6 months (57.89%) compared with 7-12 months and >12 months of age (P<0.05). Cryptosporidium oocysts were detected in cattle using surface and well water with the highest prevalence of infection (81.58%) were with surface water. There was no significant association of prevalence of Cryptosporidium oocysts with feeding pattern (P>0.05). These animals are likely to play an important role in the epidemiology of cryptosporidiosis in cattle and humans. These findings clearly demonstrate that cattle farmers and the people living in villages amidst cattle in Badulla district are more exposed to the infection. Key Words: Cryptosporidium spp, Gastrointestinal parasites, Cattle
  • No Thumbnail Available
    Item
    A Study on Gastrointestinal Parasitism of Nematode and Eimeria spp on Cattle and Goat Units in Mahaberiyathanna Farm
    (Uva Wellassa University of Sri Lanka, 2010) Kumaragama, K.M.K.R.; Rajapakse, R.P.V.J.; Samaraweera, A.M.; Wijesundara, K.
    This paper reports the prevalence of gastrointestinal nematodes and Eimeria spp in goat and cattle units in NLDB farm, Mahaberiyathanna from March to June 2010. Eggs (EPG) and oocysts (OPG) in a gram of fecal matter and larval counts were obtained from fecal samples of 40 cattle and 80 goats. Goats and cattle were divided into 3 age groups as < 6 month, 6 - 12 month and > 1 year and results were analyzed accordingly. Three genera of gastrointestinal nematodes namely Haemonchus, Trichostrongylus, Oesophagostomum and Eimeria alljevi and Eimeria arloingi of genera Eimeria were identified in the goat unit, while the Haemonchus and Oesophagostomum were identified in cattle. Eimeria spp were dominant (P<0.05) in goats below 6 month of age and Strongyl spp were dominant (P<0.05) among above one year age group in both cattle and goat units. Goat and cattle farm EPG and OPG value increased significantly (P<0.05) with the rainfall. The goats were sent for grazing while cattle were stall fed and, this can be the reason for the severity of gastrointestinal parasites in goats compared to cattle unit. These observations serve as a useful guide for strategic control of gastrointestinal nematodes and Eimeria spp in Mahaberiyathanna NLDB farm. Key words: Gastrointestinal Nematodes, Eimeria spp, EPG, OPG, Rain fall, Pasture land, Cattle, Goat