Results 241 to 250 of about 18,764,038 (293)

Influence of process parameters on the surface and chemical properties of activated carbon obtained from biochar by chemical activation

Bioresource Technology, 2013
Activated carbons were produced from biochar obtained through pyrolysis of safflower seed press cake by chemical activation with zinc chloride. The influences of process variables such as the activation temperature and the impregnation ratio on textural and chemical-surface properties of the activated carbons were investigated.
Sakarya Üniversitesi/Mühendislik Fakültesi/Gıda Mühendisliği Bölümü, Angın, Dilek, Altıntığ, Esra, Yılmaz, Dilek Angın   +3 more
openaire   +6 more sources

Influence of the Parameters of Formulation on the Chemical Activity of Admixtures in Mortars

Materials Science Forum, 2012
To analyze the chemical activity of admixture in mortars, we used a methodology which guarantees that the obtained mixtures still have a volume of the flexible phase and an initial porosity constant. Then, only the clean chemical effect of the admixture is taken into account in the variation of the mechanical strengths.
Abdelaziz Boudchicha, Mustapha Cheikh Zouaoui, Jean Louis Gallias   +2 more
openaire   +1 more source

Physico-chemical parameters influencing DNase activity of the cyanobacterium Spirulina platensis

Microbiological Research, 2000
The effects of temperature, Mg2+, EDTA concentration and rinsing on extra- and intra-cellular DNase activity of Spirulina platensis strain SSP-14, were investigated. The results indicate that the tested strain contains very high extra- and intracellular DNase activity, which actually hinders the transfer of foreign gene(s) to S.
J, Cao, D, Liang, Z, Xu, G, Qiu, B, Li, A, Vonshak   +5 more
openaire   +2 more sources

Activity of cathepsin D as affected by chemical and physical dry-curing parameters

Zeitschrift f�r Lebensmittel-Untersuchung und -Forschung, 1990
The effect of curing agents (nitrate, glucose, ascorbic acid and chloride) and physical parameters (temperature, water activity and pressure) on porcine muscle cathepsin D has been studied. Chloride (in the assayed range 0 to 75 g Cl-/L) showed a strong inhibitory effect.
E, Rico, F, Toldrá, J, Flores
openaire   +2 more sources

Chromatographic determination of the physico-chemical parameters of adsorption on active carbons

Journal of Chromatography A, 1991
Abstract Inverse gas chromatography was used to determine the adsorption isotherms of benzene and nitrogen on activated carbon fibres (ACFs) obtained from viscose and polyacrylonitrile cloths. For benzene the results were compared with those obtained by the static method.
Zygfryd Witkiewicz, Henryk Grajek, Jerzy Choma   +2 more
openaire   +1 more source

Correlations between chemical parameters, mitogenic activity and embryotrophic activity of bovine oviduct-conditioned medium

Theriogenology, 1997
To establish parameters predicting the quality of bovine oviduct epithelial cell-conditioned media, we compared media conditioned by oviduct cells from cows at Day 2 (n = 3) and Day 15 (n = 3) of the estrous cycle. In addition, we tested the influence of time of conditioning. Media were evaluated for their embryotrophic activity using a cumulus cell co-
Stojkovic, M., Wolf, E., van Langendonckt, A., van Steenbrugge, A., Charpigny, Gilles, Reinaud, Pierrette, Gandolfi, F., Brevini, T.A.L., Mermillod, Pascal, Terqui, M., Brem, G., Massip, A.   +11 more
openaire   +3 more sources

Determination of Some Chemical Parameters and Antimicrobial Activity of Traditional Food: Mesir Paste

Journal of Medicinal Food, 2010
The antimicrobial activities and some chemical properties of the traditional Turkish food called mesir paste were studied. Results of chemical analysis for moisture and volatiles, water-insoluble components, refractive index, soluble solids content, raw fiber, invert sugar, total ash, 5-hydroxymethylfurfural, acidity, and pH were calculated as 17.06 ...
Oskay, Mustafa, Karayildirim, Tamer, Ay, Emriye, Ay, Kadir   +3 more
openaire   +2 more sources

Optimization of the parameters of a CO chemical laser by increasing the length of the active medium

Soviet Journal of Quantum Electronics, 1984
An experimental investigation was made of a CO chemical laser utilizing a CS2–N2O–O2 flame having an active medium up to 3 m long. Attention is drawn to the need to match the dimensions of the active medium to the mode structure of the resonator. A chemical efficiency of 15% was achieved for a cw laser radiation power of around 100 W.
V A Dudkin, V B Rukhin
openaire   +1 more source

Langmuir parameters for adsorption of two halogenated chemicals on an activated carbon pellet

Korean Journal of Chemical Engineering, 1996
1,1,2-trichloro-2,2,l-trifluoroe!hane is considered to be the prime contributor to stratospheric ozone depletion. Besides, dischloromethane is toxic. As a result, the use of activated carbon to adsorb these chemicals has been received a great attention.
Sung Yong Cho, Dai Ki Choi
openaire   +1 more source

Chemical Shift and Its Uses as an Electronic Parameter in Structure-Activity Correlations

Spectroscopy Letters, 1972
Abstract Apparent correlations are found between the N-H chemical shifts of congeneric series of compounds and the dipole moments of the molecules, such as lactams and thiolactams, cyclic ureas and thioureas. When there is a high degree of correlation, either the N-H chemical shift or the dipole moment of the molecule can be used as an electronic ...
E. J. Lien, J. T. Chou, G. A. Guadauskas
openaire   +1 more source