http://dr.lib.sjp.ac.lk/handle/123456789/10546 Wed, 07 Jan 2026 04:00:13 GMT 2026-01-07T04:00:13Z http://dr.lib.sjp.ac.lk/handle/123456789/10692 Leaf Extracts of Lobelia nicotianaefolia as a Potential Biopesticide Against Defoliator Pests Deepa, B.; Remadevi, O.K. Thu, 01 Jan 2015 00:00:00 GMT http://dr.lib.sjp.ac.lk/handle/123456789/10692 2015-01-01T00:00:00Z http://dr.lib.sjp.ac.lk/handle/123456789/10691 Morpho-Physiological Dynamics of Weedy Rice Seeds Collected from Two Contrasting Agro-Ecological Zones in Sri Lanka Ratnasekera, D.; Rupasingha, K.M.A.S.K. Thu, 01 Jan 2015 00:00:00 GMT http://dr.lib.sjp.ac.lk/handle/123456789/10691 2015-01-01T00:00:00Z http://dr.lib.sjp.ac.lk/handle/123456789/10690 Determination of the Effectiveness of Hal Bark (Vateria copallifera) as a Natural Preservative for Food Security of Confectionery Industry Navaratne, S.B. Hal (Vateria copallifera) bark can be used to control sugar fermentation process by yeast. Therefore, it was subjected to sun, mechanical, shade and cooling with dehumidified (CD) drying processes in order to identify the best drying method. 1.5 g of dried bark from four drying processes were introduced into four, 40% sugar (sucrose) solutions to identify the best drying method in terms of froth formation. In addition, 1.5 g of hal bark was introduced into 30%, 40%, 50% and 60% sugar solutions to determine at what sugar concentration that hal bark is capable to control sugar fermentation. Moreover, 0.5, 1.0, 1.5, 2.0 and 3.0 g of bark from the best drying method were introduced into 50% sucrose solutions to determine the level that Hal bark can be incorporated into sugar solutions without changing the sugar taste. Finally, optimum level of Hal bark was introduced into 50% sugar solution and levels of reducing, non-reducing and total sugars against the control were monitored. Sugar solutions were inoculated with 1.0% yeast. The best drying method was CD as it was capable to control sugar fermentation at 40% sugar level and others had it at 50% level. Sensory evaluation revealed that up to 1.0 g of hal bark can be incorporated into 100 ml of sugar solutions without disturbing to the sugar taste. While 1 g of hal bark was capable to control sugar fermentation at 50% sugar level, control had same performance at 60%. 1.2 g of Hal bark from the best drying method in 50% sugar solution was capable to maintain reducing, non-reducing and total sugars unchanged against the control. Thu, 01 Jan 2015 00:00:00 GMT http://dr.lib.sjp.ac.lk/handle/123456789/10690 2015-01-01T00:00:00Z http://dr.lib.sjp.ac.lk/handle/123456789/10689 Greenhouse Gas Emissions from Plantation to the Proceeded Wood Products via State Timber Corporation Depots for Selected Tree Species using Life Cycle Assessment Senadheera, D.K.L.; Ranasinghe, D.M.S.H.K.; Wahala, W.A.S.B. Life Cycle Assessment (LCA) provides a methodological framework for evaluating environmental performance over the life cycle of a product, process, or an activity. In Sri Lanka, majority of timber for wood based industries comes from homegardens and Government owned forest plantations. State Timber Corporation (STC) is the authoritative body for timber harvesting in state owned forest plantations. This LCA study was carried out to calculate Greenhouse Gas (GHG) emissions of the STC timber movements from the plantation to the finished product. The study concentrated on teak, eucalypt and mahogany species as they represented fast moving commercial timber of high significance. Assessment boundary was from the harvesting to the product. Updated emission factors were used to calculate the CO2 eq units. When considering the emissions during the process, the highest was recorded in the sawmilling process (48% from sawing, 9% from surfacing and 9% from drying). The transportation accounted for 31.25% of emissions while harvesting contributed to 6%. Other indirect emissions accounted for 2.75%. Thu, 01 Jan 2015 00:00:00 GMT http://dr.lib.sjp.ac.lk/handle/123456789/10689 2015-01-01T00:00:00Z