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Study the suitability of neem seed oil for formulation of eco-friendly oil based drilling fluid

Petroleum Research 2021年第3期6卷 283-290页

作者： Adesina Fadairo Gbadegesin Adeyemi Temitope Ogunkunle Kegang Ling Vamegh Rasouli Elijah Effiong James Ayoo Department of Petroleum Engineering University of North DakotaUSA Department of Petroleum Engineering Covenant UniversityNigeria Chevron Nigeria Limited Nigeria

The present work intended to develop an invert emulsion drilling mud from biodegradable neem seed oil as an alternative to conventional diesel-based drilling *** would present comparable properties and performances with API standard requirements,ecologically friendly and at a low *** produced from non-edible neem oil was used as the continuous phase in an invert emulsion-based drilling *** tests to investigate the applicability of the mud for drilling applications were *** rheological and lubricity tests results indicate that the neem oil biodiesel-based drilling muds are comparable with conventional diesel-based drilling *** produced biodiesel shows a significantly better flash point of 168℃ than the traditional diesel flash point of 70℃;indicating better fire safety than the conventional *** lubricity and rheological data indicate the formulated mud with neem seed oil biodiesel fair reasonably well with conventional diesel and within the API re*** general,the preliminary results show that neem oil biodiesel is a potential alternative to conventional organic oil in formulating oil-based drilling mud in terms of technical and environmental analysis.

关键词： Drilling mud invert emulsion Biodiesel Neem seed oil

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Efficacy Improvement of a Bioherbicidal Fungus Using a Formulation-Based Approach

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American Journal of Plant Sciences 2016年第16期7卷 2349-2358页

作者： Clyde D. Boyette Robert E. Hoagland Kenneth C. Stetina USDA-ARS Biological Control of Pests Research Unit Stoneville MS USA USDA-ARS Crop Production Systems Research Unit Stoneville MS USA

Greenhouse experiments were conducted to determine the effects of an invert (water-in-oil) emulsion (IE) on dew period duration and dew delay of Colletotrichum coccodes for biocontrol of the problematic weed, eastern black nightshade (Solanum ptycanthum). Dew periods of 4, 8, or 12 h provided 10%, 25%, and 40% control of eastern black nightshade plants, respectively, when C. coccodes (Strain NRRL 15,547) spores were applied in water + Tween 80 surfactant 12 days after inoculation, but a minimum of 16 h of dew was required to achieve ~95% plant mortality. In contrast, at these same intervals of dew, 95%, 100% and 100% mortality occurred, respectively, when fungal spores were formulated in the IE. Even in the absence of dew, 60% mortality and 70% dry weight reductions of plants was achieved with the fungus/IE formulation Delaying dew by 2 h after inoculation did not significantly reduce weed control or plant dry weight reductions when plants were inoculated with the fungus either in the aqueous or in the IE formulation. However, when dew was delayed for 4, 8, or 12 h, only 60%, 50%, and 25% mortality, respectively, of plants receiving the aqueous spore treatment occurred. In contrast, 95%, 90%, and 90% weed mortality occurred after the same dew delays of plants receiving the fungus/ IE treatments. These results demonstrate that formulating C. coccodes spores in an invert emulsion greatly improves the bioherbicidal potential of this fungus. Furthermore, results suggest that this formulation may render pathogens previously rejected for development as bioherbicides due to restrictive dew requirements more efficacious for use in controlling their target weeds.

关键词： Colletotrichum coccodes Solanum ptycanthum Bioherbicide invert emulsion Formulation

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