Results 31 to 40 of about 34,111 (160)

Ordering of alkane isomers by means of connectivity indices [PDF]

Journal of the Serbian Chemical Society, 2002
The connectivity index of an organic molecule whose molecular graph is Gis defined as C(λ)=Σ(δuδv)λwhere δu is the degree of the vertex u in G, where the summation goes over all pairs of adjacent vertices of G and where λ is a pertinently chosen ...
Gutman Ivan, Vidović Dušica, Nedić Anka   +2 more
doaj   +1 more source

alkanes

, 2014
Citation: 'alkanes' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.A00222 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial usage
openaire   +2 more sources

INVESTIGATION OF CONVERSION OF N-BUTANE TO LIGHT OLEFINS ON CATALYSTS Pd/ℽ-Al₂O₃ AND Pd/SiO₂

Шәкәрім университетінің хабаршысы: Техника ғылымдар
The results of the conversion of n-butane on supported palladium catalysts in a stationary mode in the temperature range of 400-600 °C, at atmospheric pressure and a volumetric feed rate of n-butane of 250 h–1 are presented.
D. N. Karimova, A. A. Vosmerikov, S. R. Konuspaev, L. N. Vosmerikova, A. V. Vosmerikov   +4 more
doaj   +1 more source

GC-MS metabolic profiling and free radical scavenging activity of Micromeria dalmatica

Biologica Nyssana, 2016
Metabolite profile of acetone exudate and methanolic extract from aerial parts of Micromeria dalmatica Benth were analyzed by GC/MS. Palmitic and linolenic acids, hentriacontane, amyrin, quercetagetin 3,6,7-trimethyl ether, sucrose were identified ...
Nikolova, M., Aneva, I., Berkov, S.
doaj   +1 more source

The organic matter in thermal and surface waters of Tumnin deposit of thermal waters, the Far East of Russia

Известия Томского политехнического университета: Инжиниринг георесурсов, 2019
The work deals with the study of organic compounds composition in thermal waters, which is topical for regional ecology, balneology, determination of oil genesis, and study of the origin of life problem.
Valery Poturay
doaj   +2 more sources

PETROCHEMICAL EMISSIONS PRODUCED BY THE OBJECTS OF THE AUTOMOBILE AND HIGHWAY COMPLEX [PDF]

Avtomobilʹnyj Transport (Harʹkov), 2015
As a result of experimental researches it was established that the flow of petrochemicals from the ob-jects of the automobile and highway complex that spreads over the adjoining roadside areas corre-lates with the traffic intensity at objects of the same
V. Iurchenko, O. Melnikova, L. Mykhailova, T. Fisher   +3 more
doaj  

KOtBu as a Single Electron Donor? Revisiting the Halogenation of Alkanes with CBr4 and CCl4

Molecules, 2018
The search for reactions where KOtBu and other tert-alkoxides might behave as single electron donors led us to explore their reactions with tetrahalomethanes, CX4, in the presence of adamantane.
Katie J. Emery, Allan Young, J. Norman Arokianathar, Tell Tuttle, John A. Murphy   +4 more
doaj   +1 more source

Compositional variances in petal cuticular wax of eight rose species and their impacts on vase life under water-loss stress

Frontiers in Plant Science
Cuticular wax is the first barrier between plants and the environment. Here, the densities of cuticular wax crystals on the petals of eight rose cultivars were determined to be sparse; the crystals were mostly granular and only a few rod-shaped crystals ...
Xuan Hao, Junheng Lv, Zixian Zhao, Yuxin Tong, Minghua Deng, Jinfen Wen   +5 more
doaj   +1 more source

Metabolic engineering of Yarrowia lipolytica for enhanced microbial production of medium-chain α, ω-diols from alkanes via CRISPR-Cas9 mediated pathway optimization and P450 alkane monooxygenase overexpression

Frontiers in Bioengineering and Biotechnology
IntroductionMedium- to long-chain α, ω-diols are valuable building blocks for polyesters and polyurethanes, yet their microbial synthesis from inexpensive alkane feedstocks remains largely undeveloped.
Ye Chan Kim, Won Yoon Hwan Choi, Eun-Jung Kim, Byung‐Gee Kim, Hyungdon Yun   +4 more
doaj   +1 more source

The potential use of n-alkanes, long-chain alcohols and long-chain fatty acids as diet composition markers: indoor validation with sheep and herbage species from the rangeland of Inner Mongolia of China

Animal, 2012
To investigate the potential use of n-alkanes (alkanes), long-chain alcohols (alcohols) and long-chain fatty acids (acids) for estimating the diet composition of sheep, in a feeding trial.
L.J. Lin, X.Y. Zhu, C. Jiang, H.L. Luo, H. Wang, Y.J. Zhang, F.Z. Hong   +6 more
doaj   +1 more source