منابع مشابه
Chemical Kinetics of Cetane Number Improving Agents
INTRODUCTION The increasing demand for diesel fuels has resulted in the use of greater percentage of cracked distillates having poor ignition properties. The ignition properties of diesel fuels can be rated in terms of their cetane number and diesel fuels having low cetane number may have poor ignition properties such as diesel knock, difficulties to start engines in the cold weather and so on....
متن کاملCetane Number and Thermal Properties of Croton Oil , Biodiesel , 1 - Butanol , and Diesel Blends
Vegetable oil derived fuels for diesel engines are becoming important as alternative to petroleum diesel fuels due to their environmental friendliness and availability. Ignition quality in compression ignition (CI) engines is influenced by thermal characteristics and fuel properties. In this study, the effects of vegetable oil transesterification and vegetable oil-1-butanol-diesel blend on fuel...
متن کاملNumber reading in pure alexia—A review
It is commonly assumed that number reading can be intact in patients with pure alexia, and that this dissociation between letter/word recognition and number reading strongly constrains theories of visual word processing. A truly selective deficit in letter/word processing would strongly support the hypothesis that there is a specialized system or area dedicated to the processing of written word...
متن کاملBinomial squares in pure cubic number fields
Let K = Q(ω), with ω3 = m a positive integer, be a pure cubic number field. We show that the elements α ∈ K× whose squares have the form a − ω for rational numbers a form a group isomorphic to the group of rational points on the elliptic curve Em : y2 = x3 − m. This result will allow us to construct unramified quadratic extensions of pure cubic number fields K.
متن کاملNumber of Kekule Structures as a Function of the Number of Hexagons in Benzenoid Hydrocarbons
The enumeration of Kekule structures has fasci nated several researchers since the first systematic studies of benzenoids in terms of graph theory [1-9] , Apart from the recognized importance of Kekule structures in organic and physical chemistry they also have purely mathematical interest. Refer ence is made to a recent article in the present jo u r nal [10] along with the bibliography the...
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ژورنال
عنوان ژورنال: Journal of The Japan Petroleum Institute
سال: 1987
ISSN: 0582-4664
DOI: 10.1627/jpi1958.30.195