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Articles by T.C. Loh
Total Records ( 3 ) for T.C. Loh
  K.T. Khaing , T.C. Loh , S. Ghizan , M.F. Jahromi , R.A. Halim and A.A. Samsudin
  The effects of different inclusion level of whole corn plant silage to Napier grass were observed in determining rumen fermentation and microbial population in goats. Fifteen male Boer cross goats around six months old of approximately 18.54±1.83 kg of b.wt., were used as experimental animals. The goats were assigned into five groups with three goats per treatment group. The five treatment groups consisted of different proportions of Napier Grass (G) and whole corn plant silage (CS)-G/CS, (T1) 100/0, (T2) 75/25, (T3) 50/50, (T4) 25/75 and (T5) 0/100, respectively. The mean concentrations of rumen NH3-N (mg dL–1) were not significant differences among the treatments, although T4 and T5 were slightly increased compared to other treatments. The total VFA production in the rumen fluid of the goat was not significantly different among the treatments, however; highest molar proportion of propionic acid and lowest proportion of acetic acid was observed in goat fed with T5 diets. Although the total bacteria population of rumen content was not significantly different among the dietary treatments, the population of R. albus, R. flavefaciens and F. succinogen showed significantly (p<0.05) among the treatments. The lowest population of methanogen and protozoa were detected in the rumen of goats fed T5 diet compared with other treatments. Thus, the animals fed with T5 diet showed the highest proportion of propionic acid and the lowest number of methanogen and protozoa population in the rumen.
  E. Maroufyan , A. Kasim , S.R. Hashemi , T.C. Loh and M.H. Bejo
  The aim of this study was to find the effect of methionine and threonine supplementations higher than the NRC recommendation on growth performance and white blood cell differentiation of broiler chickens challenged with infectious bursal disease. A total of 450 day-old male broiler chicks were assigned to nine groups. Chickens were fed by three graded levels of DL- methionine [NRC (M1), 2 times NRC (M2) and 3 times NRC (M3)] and three graded levels of L-threonine [NRC (T1), 2 times NRC (T2) and 3 times NRC (T3)] from day 1-42 of age. On day 28, all birds were challenged with a commercial live-IBDV vaccine. Body Weight Gain (BWG) and Feed Intake (FI) and Feed Conversion Ratio (FCR) were significantly influenced by the dietary treatments before challenge and either methionine or threonine at the highest levels significantly decreased BWG, FI and FCR in broiler chickens. Birds were fed with M3T3 had the lowest body weight gain after challenge. Supplementation of two times methionine and threonine (M2T2) to the diet decreased peripheral blood heterophils and increased lymphocytes and H/L ratio on day 28. On day 42, complete white blood cell tended to increase with increasing level of methionine supplementation. Threonine did not affect peripheral blood differential leukocyte count of broiler chickens. In conclusion, our data suggest that the methionine and threonine requirement of male broiler chicks is higher for growth performance than was suggested by the last NRC committee and methionine and threonine higher than NRC requirements in tropical condition can ameliorate the negative effects of heat stress.
  M.R. Rosyidah , T.C. Loh , H.L. Foo , X.F. Cheng and M.H. Bejo
  A study was conducted to study the effects of feeding metabolites which produced from L. plantarum and acidifier in the diets of broilers chickens on growth performance, microflora count, digesta and faecal pH, immunoglobulin status and volatile fatty acids. A total of 288 male Cobb randomly assigned to five dietary groups for 42 days, basal diet feed (negative control), basal diet feed+neomycin and oxytetracyline (positive control), basal diet feed+0.1% acidifiers (A), basal diet feed+0.5% metabolite (M), basal diet feed+0.1% acidifiers (A) and 0.5% metabolite (M). Higher final body weight and weight gain, lower daily feed intake and feed conversion ratio were found in metabolites and combination of metabolite and acidifier groups while greater lactic acid bacteria count, low faecal and digesta pH and increase volatile fatty acids were found in 3 treated groups. No significant difference was found for immunoglobulin level.
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