1,726,893 research outputs found
Chemical characterization of camelina seed oil:
No full textCamelina sativa (L).Crantz also known as false flax, Dutch flax is an ancient oil seed crop that belongs to the Brassicaceae family. Camelina oil pressed from the seeds of this crop has a unique aroma.
Eighteen camelina oil samples were analyzed for fatty acid composition (13 unrefined, 2 deodorized and 3 refined samples). Eight of these samples were analyzed for unsaponifiables content, free fatty acids and volatiles and semi-volatile compounds. Seven camelina seed samples were analyzed for volatile and semi-volatile compounds as well to determine the suitability of these products in animal feed formulations.
Fatty acid composition was obtained by the trans-esterification of the triacylglycerols in the oil to their methyl esters and 21 different fatty acids with chain length from C-14 to C-24 were identified. The major fatty acids were α-linolenic, linoleic, oleic, eicosenoic and palmitic acid and three fatty acids, namely tricosanoic, pentadecanoic and heptadecanoic are being first reported here.
The unsaponifiables fraction in camelina oil samples ranged between 0.45-0.8% and 21 compounds were identified. The major compounds identified were β-sitosterol, campesterol, cholesterol, phytol, squalene and brassicasterol which accounted for 80-90% of the unsaponifiable content in camelina oil.
A total of 168 and 306 volatile and semi-volatile compounds were identified in the headspace of camelina seeds and oil respectively. Homologous series of lipid oxidation derived compounds like aldehydes, ketones, alcohols, furans and hydrocarbons dominate the aroma and favor profile of the oil and seeds. Sulfur compounds (methyl mercaptan, dimethyl sulfide, dimethyl disulfide and dimethyl trisulfide), naturally occurring 3-alkyl-2-methoxy pyrazines, terpenes, short chain free fatty acids and maillard reaction products were also identified in camelina seeds. The presence of 2-sec-butyl-3-methoxy pyrazine, aldehydes and alcohols (with green notes) and sulfur compounds like 2, 4, 5-trithiahexane and 1-butene-4-isothiocyanato in some camelina oils, may be responsible for the unique aroma of this oil.
The information from this study may potentially be used by camelina oil producers as supporting data for the chemical characteristics of the oil produced in Montana, USA. Camelina oil can serve as a good vegetable source of α-linolenic acid provided it gets the much awaited GRAS certification.M.S.Includes bibliographical references (p. 165-170)by Anusha Sampat
Online feedback system / Anusha Devi Rajaratnam
No full textCurrently, FSKTM, and many other universities as well, conducts manual course-end surveys in which each student will have to complete a paper survey form to evaluate each of the courses they have taken during a particular semester. This Online Feedback System is designed to automate this manual survey process by putting the entire evaluation system online. Students can login to take the survey through a Web interface, results are retained in a database, and survey statistics can be accessed on the Website. The objective of this system is to develop a system that enables the students to take this survey from any remote location that has an Internet connection. This project will focus on three modules which are Administrator module, Lecturer module and Student module. Administrator has the authority to create or modify questions, where as the lecturers will be able to view and print report according to course code, semester and instructors name Students will select categories such as department, course code, year/ year graduated, view and give feed back The web server for this system is the Internet Information Server (IIS) running under the Microsoft Windows 2000. Active Server Pages (ASP) will be the main programming language technology while database will be created and stored from Microsoft Access base on the system requirement
Assessment and evaluation of the values and threats affecting abandoned agricultural terrace environments in Il-Majjistral Nature and History Park, Malta
No full textThis study investigates the features and trends seen in an abandoned agricultural terrace environment in il majjistral nature park. This report specifically identifies biodiversity trends in relation to soil moisture, and the condition of rubble walls. Stakeholder conflict creates complex issues for the management and conservation of protected socio-ecological systems, wherein intangible cultural heritage practices both threaten and provide value to a given environment. In this report, a seven-point soil wetness scale is used to identify biodiversity trends in relation to soil moisture . In addition, a Rubble Wall Degradation Index is constructed to determine the urgency for rubble wall maintenance. Alongside these indexes, an analysis of the activities threatening the human-modified, geodiverse landscape is used. Ecological values of the rubble wall and terrace landscape are examined through species diversity testing and plant type analysis; findings suggest that walled, abandoned agricultural terraces create a rich and active, yet at-risk geo and biodiverse micro-ecosystem which intertwines with human leisure and heritage. Suggestions are made for holistic implementations of sustainable conservation and management
Young people, politics and elections : reflection on their perceptions and expectations
No full textSantosh Sharma Poudel, Binita Nepali, Anusha Basnet, and Sagoon Bhetwal, Nepal Institute for Policy Research (NIPoRe
- …
