نتایج جستجو برای: hydrocarbons

تعداد نتایج: 26785  

Journal: :Journal of Chemical Education 1956

Journal: :Journal of Chemical Education 2004

Journal: :International Journal of Energy Research 1977

Journal: :Chemical reviews 2005
Alexander I Boldyrev Lai-Sheng Wang

Since its introduction by August Kekulé in 1865,1 the concept of aromaticity has been continuously conquering new territories in chemistry (refs 2-20 are only a small fraction of the published articles, reviews, books, and conference proceedings on this subject). Initially, aromaticity was developed for the following classes of organic compounds: (i) monocyclic planar conjugate hydrocarbons and...

Journal: :Critical reviews in biotechnology 2002
Anirban Banerjee Rohit Sharma Yusuf Chisti U C Banerjee

Botryococcus braunii, a green colonial microalga, is an unusually rich renewable source of hydrocarbons and other chemicals. Hydrocarbons can constitute up to 75% of the dry mass of B. braunii. This review details the various facets of biotechnology of B. braunii, including its microbiology and physiology; production of hydrocarbons and other compounds by the alga; methods of culture; downstrea...

2010
Mihaela Marilena Lăzăroaie

Most of our knowledge about pollutants and the way they are biodegraded in the environment has previously been shaped by laboratory studies using hydrocarbon-degrading bacterial strains isolated from polluted sites. In present study Gram-positive (Mycobacterium sp. IBBPo1, Oerskovia sp. IBBPo2, Corynebacterium sp. IBBPo3) and Gram-negative (Chryseomonas sp. IBBPo7, Pseudomonas sp. IBBPo10, Burk...

Journal: :Chemical senses 2005
Nicolas Châline Jean-Christophe Sandoz Stephen J Martin Francis L W Ratnieks Graeme R Jones

In social insect colonies, recognition of nestmates, kinship, caste and reproductive status is crucial both for individuals and for the colony. The recognition cues used are thought to be chemical, with the hydrocarbons found on the cuticle of insects often cited as being particularly important. However, in honeybees (Apis mellifera) the role of cuticular hydrocarbons in nestmate recognition is...

Journal: :Systematic and applied microbiology 2006
F L Toledo C Calvo B Rodelas J González-López

Fifteen bacterial strains isolated from solid waste oil samples were selected due to their capacity of growing in the presence of hydrocarbons. The isolates were identified by PCR of the 16S rDNA gene using fD1 and rD1 primers. The majority of the strains belonged to genera Bacillus, Bacillus pumilus (eight strains) and Bacillus subtilis (two strains). Besides, three strains were identified as ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Claire M Belcher Paul Finch Margaret E Collinson Andrew C Scott Nathalie V Grassineau

It has been proposed that extensive wildfires occurred after the Cretaceous-Tertiary (K-T) impact event. An abundance of soot and pyrosynthetic polycyclic aromatic hydrocarbons (pPAHs) in marine K-T boundary impact rocks (BIRs) have been considered support for this hypothesis. However, nonmarine K-T BIRs, from across North America, contain only rare occurrences of charcoal yet abundant noncharr...

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