Regression analysis on factors affected roundwood production in Malaysia
Regression analysis was carried out from a study conducted to determine factors that 
affected the production of roundwood in Malaysia from year 2001 to 2010 based on 
data from Food and Agriculture Organization (FAO) Statistic online database, Forestry 
Department Peninsular Malaysia (FDPM), Malaysia Timber Industry Board (MTIB) 
and International Timber Tropical Organization (ITTO). The data have been collected 
regarding to roundwood production volume, consumption volume, import and export 
volume to determine the factors that influenced the roundwood production in Malaysia 
among of them. The result show that the roundwood production in Malaysia 
significantly affected by roundwood consumption and import, where the regression 
models obtain the relationship between roundwood production with roundwood 
consumption (p = 0.000) and roundwood import (p = 0.021
A Study on Trend of Logs Production and Export in the State of Sarawak, Malaysia
This study was conducted to determine the trend of logs production and export in the state of Sarawak, Malaysia. The trend of logs production in this study referred only to hill and peat swamp forest logs production with their species detailed production. The trend of logs export was divided into selected species and destinations. The study covers the analysis of logs production and export for a period of ten years from 1997 to 2006. Data on logs production and export were collected from statistics published by the Sarawak Timber Industry Development Corporation (Statistic of Sarawak Timber and Timber Product), Sarawak Timber Association (Sarawak Timber Association Review), Hardwood Timber Sdn. Bhd (Warta) and Malaysia Timber Industry Board (MTIB). The trend of logs production and export were analyzed using regression model and times series. In addition, the relation between hill and peat swamp forest logs production with their species and trend of logs export by selected species and destinations were conducted using simple regression model and descriptive statistical analysis. The results depicted that volume of logs production and export by four major logs producer (Sibu division, Bintulu division, Miri division and Kuching division) for hill and peat swamp forest showed a declining trend. Result showed that Sibu division is the major logs producer for hill forest while Bintulu division is the major producer of logs produced for the peat swamp forest. The main species produced by both hill and peat swamp forest is Meranti (Shorea spp.). Eight selected species for the exported logs were Meranti, Kapur, Keruing, Selangan Batu. Sepetir, Nyatoh, Mersawa and Bindang. Among the eight selected species, Meranti is the main logs volume exported by Sarawak. The eight major logs export destinations by Sarawak were Japan, South Korea, Taiwan, Hong Kong, China, India, Thailand and Singapore. The entire eight destinations showed decreasing trend except India. As a conclusion, the trend of logs production and export in the state of Sarawak for 1997 to 2006 showed a declining trend.
Serum Profiles of Luteinizing Hormone, Oestradiol and Cholesterol and Ovarian Functions in Layer Poultry Birds (Gallus domesticus) Fed Diets Containing Furazolidone
This study was carried out to assess the serum profiles of luteinizing hormone (LH), oestradiol, cholesterol and ovarian functions in layer poultry birds (Rhode Island Red;Gallus domesticus) fed a diet containing various concentrations of furazolidone (FZ). A total of 40 birds were randomly assigned to receive FZ 0, 200, 400 or 800 mg/kg feed (ppm) daily during the pre-laying age, i.e. 13–18 weeks (for 5 weeks). Blood samples were collected at weekly intervals. Concentrations of LH and oestradiol in serum were estimated at alternate weeks using radioimmunoassays. Serum cholesterol levels were analysed by an enzymatic calorimetric method. Furazolidone administration was terminated at the 18th week of age. The birds were sacrificed at 22nd week of age and ovarian tissues were processed for morphometric studies. Serum LH, oestradiol and cholesterol levels were affected by age (p<0.001) and FZ dose (p<0.001). Serum LH and oestradiol levels were lower (p<0.05) in birds receiving FZ 800 mg/kg feed daily compared with the controls, whereas serum cholesterol profiles were lower (p<0.05) in all FZ-administered groups than in the control group. The mean weight of ovaries having no yolky follicles observed in the group receiving FZ 400 or 800 mg/kg feed per day was reduced (p<0.05) compared with the control group. Dosing FZ at 800 mg/kg feed per day reduced (p<0.05) the mean volume of ovaries having no yolky follicles compared with the control group. In birds receiving FZ 800 mg/kg feed per day, the mean length of the oviduct was reduced (p<0.05) as compared with the control group. Morphometric studies revealed that the mean number of oocytes with diameter in the range 401–800 μm decreased (p<0.05) in birds fed FZ 400 or 800 mg/kg feed per day. Initial egg production was affected by age (p<0.001) and dose (p<0.001) of FZ. The mean number of eggs laid by different groups revealed that egg production was reduced (p<0.05) in birds receiving FZ 800 mg/kg feed per day as compared with the controls. The present data suggest that FZ causes suppression in serum profiles of LH, oestradiol, cholesterol and ovarian functions in Rhode Island Red layer poultry birds. Therefore, great care must be taken with use of FZ in layer poultry birds (Gallus domesticus) with regard to dosage and duration of administration.