256,706 research outputs found

    Studies on the nutrition of brackish water catfish - Chrysichthys nigrodigitatus . 1. Preliminary investigations on the probable use of vegetable oil in catfish feeds

    Get PDF
    Four groups of brackishwater catfish were fed four diets: N.F. (NIOMR formula 1 feed), A. B. and C. for seven weeks. Feeds N.F., A., B and C. contained 1.21% fish oil + 5.59% vegetable oil; 1.21% fish oil + 7.39% vegetable oil; 1.21% fish oil + 9.09% vegetable oil; 1.21% fish oil + 10.89% vegetable oil respectively. Results of feeding trial showed that growth was best in the group fed diets containing 10.89% vegetable oil and least in those containing 9.09% vegetable oi

    Performance and emissions of compression ignition engine fueled with preheated blend of vegetable oil

    Get PDF
    Now days fossil fuel has been a problem that can been use in a compression ignition engine. Straight vegetable oil is one of the most reliable fuel that suitable for diesel engine. The scope of study of this study is focused on performance and emission of the straight vegetable oil from the grocery store to compare with crude palm oil from UTHM pilot plan. S5, S10 and S15 straight vegetable oil fuel is used for this experiment. This straight vegetable oil is also compared with an natural diesel in a combustion-ignition engine. The test is conducted with UTHM dynomometer which is located at automotive lab. The properties of the vegetable oil is tested for density, kinematic viscosity, water content, acids value and flash points. Brake power, flywheel torque, (in term of hydrocarbon, carbon monoxide, carbon dioxide, oxygen content and smoke opacity) and tested for performance and emission. Results obtained show that flywheel torque that has been produced from the biodiesel fuels are less than the natural diesel (ND). Biodiesel emission results shown a better emission compared to the ND fuels. The CO2, CO, HC and O2 content that released from the biodiesel fuels are clearly lower than the ND fuels. At low engine speed, biodiesel smoke opacity contents are quite high produces compared to the OD and other type o

    A MULTI-COUNTRY ASSESSMENT OF CONSUMER ATTITUDES OF GENETICALLY MODIFIED FOODS AND THE IMPLICATIONS FOR NEW LABELING SYSTEM

    Get PDF
    This paper estimates the willingness to pay (WTP) for non-genetically modified (GM) vegetable oil and tofu in Korea by using contingent valuation (CV) method and compares this WTP with Japan, Norway, Taiwan and the U.S. It also recovers the distribution of WTP by using a bootstrapping approach to provide a better measure of consumer's WTP on non-GM foods. Especially, we pay attention to the different characteristics of vegetable oil and tofu; vegetable oil made from GM soybeans doesn't have genetically altered protein, but tofu made from GM soybean has genetically altered protein. For this reason, vegetable oil made from GM soybeans is excluded from mandatory GM labeling system in Korea. Therefore, in this paper, the potential differences between WTP for non-GM vegetable oil and non-GM tofu are also investigated in order to evaluate the questions regarding the relevance of the introduction of new labeling system in Korea.Food Consumption/Nutrition/Food Safety,

    Biodiesel and vegetable oil market in European Union: some evidences from threshold cointegration analysis

    Get PDF
    In this paper we analyse the long-run relationships between vegetable oils prices and conventional diesel price in EU during the period 2005- 2007. We utilise recent developments on threshold cointegration approach to investigate if asymmetric dynamic adjusting processes exist among rapeseed oil, sunflower oil, soybean oil and diesel prices. The results suggest that the two-regime threshold cointegration model exist only in favour of rapeseed oil-diesel price pair. Therefore, this vegetable oil price adjusts rapidly to its long run equilibrium, determined by fossil diesel prices, in an asymmetric manner when the divergence between the two prices is above a critical threshold. Consequently, rapeseed oil seems to be particularly exposed to exogenous shocks deriving from global political scenarios, suggesting to redefine the high quota (80%) of EU biodiesel produced by this vegetable oil through a sustainable development of international trade.Vegetable oils market, Biodiesel price, Threshold cointegration., Marketing, Resource /Energy Economics and Policy,

    Cointegration and Causality Analysis of World Vegetable Oil and Crude Oil Prices

    Get PDF
    Because of the recent soaring petroleum price and growing environmental concerns, biodiesel has become an important alternative fuel. Biodiesel is the mono alky esters made from a vegetable oil, such as soybean or rapeseed oil, or sometimes from animal fats. The escalation in world petroleum price has stimulated the demand for biodiesel, which consequently expanded the use of vegetable oils. This paper investigates the long-run interdependence between major edible oil prices and examines the dynamic relationship between vegetable and crude oil prices. The data consists of 378 weekly observations extending from the first week of January in 1999 to the fourth week of March in 2006. We apply time-series analytical mechanisms and directed acyclic graphs to four major traded edible oils prices, including soybean, sunflower, rapeseed and palm oils, along with one weighted average world crude oil price. Tentative results suggest one long-run cointegration relationship among those five oil prices. Also, the edible oil markets are well linked in contemporaneous time with the palm oil market initiating the new information; however, soybean oil price dominates the edible oil markets in the long run. The influence of crude oil price on edible oil prices is not significant over the study period.Resource /Energy Economics and Policy,

    Friction and wear response of vegetable oils and their blends with mineral engine oil in a reciprocating sliding contact at severe contact conditions

    Get PDF
    Although many studies investigating the tribological performance of pure vegetable oils have been conducted, a better understanding of vegetable oil tribological performance at extreme conditions is still needed. Similarly, little work has been carried out to study the influence of the vegetable oils on the performance of a lubricant formed from a blend of vegetable oil and conventional mineral engine oil. This work presents the tribological performance of vegetable oils, and their blends with mineral oil, in a high temperature and contact pressure reciprocating contact. Palm and soybean based vegetable oils were mixed with a commercial mineral engine oil at a 1:1 ratio by volume. The conventional mineral oil was also tested to provide a benchmark. The pure palm oil exhibited lower friction than soybean oil, but for wear performance, this was reversed. The friction performance of the palm oil was competitive to that of the mineral engine oil. The mineral engine oil was far superior in wear resistance over both vegetable oils. When blended with mineral engine oil both vegetable oils demonstrated a reduction in coefficient of friction when compared to their pure oil states. An improvement in wear performance was observed for both a blend of palm oil and mineral engine oil (25% improvement) and that of soybean and mineral engine oil (27% improvement). This work shows that for palm oil and soybean oil, the performance of a blended oil is influenced by its vegetable oil component and that tribological characteristics of vegetable oils are dominant. That said, the significant limitation of these vegetable oils is their ability to provide a satisfactory level of wear resistance. It is suggested that any future work in this area should have a greater emphasis on the enhancement of wear resistance

    Friction and wear response of vegetable oils and their blends with mineral engine oil in a reciprocating sliding contact at severe contact conditions

    Get PDF
    Although many studies investigating the tribological performance of pure vegetable oils have been conducted, a better understanding of vegetable oil tribological performance at extreme conditions is still needed. Similarly, little work has been carried out to study the influence of the vegetable oils on the performance of a lubricant formed from a blend of vegetable oil and conventional mineral engine oil. This work presents the tribological performance of vegetable oils, and their blends with mineral oil, in a high temperature and contact pressure reciprocating contact. Palm and soybean based vegetable oils were mixed with a commercial mineral engine oil at a 1:1 ratio by volume. The conventional mineral oil was also tested to provide a benchmark. The pure palm oil exhibited lower friction than soybean oil, but for wear performance, this was reversed. The friction performance of the palm oil was competitive to that of the mineral engine oil. The mineral engine oil was far superior in wear resistance over both vegetable oils. When blended with mineral engine oil both vegetable oils demonstrated a reduction in coefficient of friction when compared to their pure oil states. An improvement in wear performance was observed for both a blend of palm oil and mineral engine oil (25% improvement) and that of soybean and mineral engine oil (27% improvement). This work shows that for palm oil and soybean oil, the performance of a blended oil is influenced by its vegetable oil component and that tribological characteristics of vegetable oils are dominant. That said, the significant limitation of these vegetable oils is their ability to provide a satisfactory level of wear resistance. It is suggested that any future work in this area should have a greater emphasis on the enhancement of wear resistance

    Long‐run Relationships Between World Vegetable Oil Prices

    Get PDF
    In the international edible oil markets, there is believed to be high substitutability between vegetable oils and fats produced under different conditions. In light of this, we consider the question: what is the nature of the long‐run relationships between vegetable oil prices? Long‐run co‐movements among oil prices are analysed, based on a multivariate cointegration model. The empirical finding is that most co‐movements are consistent with the predictions of market theory. Prices of oils tend to be grouped according to their different end‐uses. Some policy implications of a buffer stock scheme are discussed.Crop Production/Industries, Demand and Price Analysis,

    Replacing Mineral Oil with Vegetable Oil to Improve the Transformer’s Performance

    Get PDF
    In this paper, the replacement of mineral oil by vegetable oil for better performance of transformer was studied. This paper reveals benefits of vegetable oil over mineral oil based on their electrical characteristic, expectation, requirement , suitability, aging, environmental impact, safety, evaluation and dielectric properties of vegetable oil. Mineral oil was traditionally used to provide isolation, but vegetable oil has become increasingly popular in the last few years, and it is presently used in the range of small- to medium-size transformers. The application of transformer is expressly accreted. The competent electric transformer division in recent years has normally been immersed in mineral oil that acts as a medium insulating the energy supply of electric equipment. This paper provides information on the key environmental and fire resistance properties and associated values for natural vegetable oil transformers. Transformers filled with such fluids are generated in general. This work motivates the transformer performance to be determined by using natural dielectric vegetable fluid in comparison with ideal mineral oil. In also to estimate the degradation of both the oils the dissolved gas analysis is carried out. However, the dielectric dissipation factor of the mineral oil was about 77 times lower than that of natural oil [1]. The application of these liquids in transformers guarantees better life span. In transformer applications, vegetable isolating oils are now commercially available as replacements for mineral- based oils. In future, the vegetable oil will be the best replacement for mineral oil
    corecore