排序方式: 共有47条查询结果,搜索用时 15 毫秒
41.
Wanner J Schmidt E Bail S Jirovetz L Buchbauer G Gochev V Girova T Atanasova T Stoyanova A 《Natural product communications》2010,5(9):1349-1354
The chemical compositions of selected essential oils from North Africa, especially Morocco, of geranium, wild Moroccan chamomile and rosemary as well as absolutes of rose and geranium were determined using GC/FID and GC/MS. These oils and absolutes were tested concerning their antimicrobial activity against some food spoilage strains obtained from fresh milk and minced meat products, like sausages and pork fillet, in accordance with ISO testing procedures. Gram-positive (Bacillus cereus and Staphylococcus aureus) and Gram-negative (Escherichia coli, Salmonella abony and Pseudomonas aeruginosa) strains were used, as well as the yeast Candida albicans. Using a serial broth dilution method, all samples demonstrated weak antimicrobial activity against the Gram-negative bacteria and the yeast, compared with the activity towards the Gram-positive bacteria. 相似文献
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Atmospheric pressure plasma surface modification of polyacrilonitrile ultrafiltration membranes is presented here aimed at improvement of some basic working characteristics of the membranes such as productivity and selectivity. The effect of the barrier dielectric discharge voltage and the treatment duration onto the physical chemical characteristics of the membrane surface was studied. XPS analysis was employed to control the alteration of the membrane surface chemical composition. Contact angle measurement was used to characterize the hydrophilic/hydrophobic balance on the surface. Membrane structure was imaged by SEM observations. 相似文献
43.
The temperature dependencies of the molar heat capacities of ZnTeO3, Zn2Te3O8, CdTeO3 and CdTe2O5 are determined. The experimental data are statistically processed using the least squares method to determine the parameters
in the equations for the corresponding compounds: Cp,m=a+b(T/K)-c(T/K)-2. These equations and the standard molar entropies are used to determine ΔT0S0m, ΔTTH0m and (Φ0m+ΔT,0H0m/T) for T'=298.15 K. 相似文献
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Plasma-chemical surface modification of polyacrilonitrile ultrafiltration membranes is presented here including surface pre-activation by treatment in cold plasma, obtained in dielectric barrier discharge at atmospheric pressure, and following chemical grafting of mono-functional polyethylene glycol (PEG) chains. The effect of such plasma-chemical modification onto the physico-chemical characteristics of the membrane surface as well as onto some basic working membrane characteristics such as productivity and selectivity was studied. XPS analysis was employed to control the chemical composition of the membrane surface. Contact angle measurement was used to characterize the hydrophilic/hydrophobic balance on the surface. Membrane structure was imaged by SEM observations. 相似文献
46.
N. M?rginean D. L. Balabanski D. Bucurescu S. Lalkovski L. Atanasova G. C?ta-Danil I. C?ta-Danil J. M. Daugas D. Deleanu P. Detistov G. Deyanova D. Filipescu G. Georgiev D. Ghi?? K. A. Gladnishki R. Lozeva T. Glodariu M. Iva?cu S. Kisyov C. Mihai R. M?rginean A. Negret S. Pascu D. Radulov T. Sava L. Stroe G. Suliman N. V. Zamfir 《The European Physical Journal A - Hadrons and Nuclei》2010,46(3):329-336
47.
M. Kmiecik A. Maj J. Gerl G. Neyens L. Atanasova D. L. Balabanski F. Becker P. Bednarczyk G. Benzoni N. Blasi A. Bracco S. Brambilla L. Caceres F. Camera M. Ciema?a F. C. L. Crespi S. K. Chamoli S. Chmel J. M. Daugas P. Detistov P. Doornenbal G. Georgiev K. Gladnishki M. Górska H. Grawe J. Gr?bosz M. Hass R. Hoischen G. Ilie M. Ionescu-Bujor J. Jolie I. Kojuharov A. Krasznahorkay R. Kulessa M. Lach S. Lakshmi S. Leoni G. Lo Bianco R. Lozeva K. H. Maier S. Mallion K. Mazurek W. M?czyński B. Million D. Montanari S. Myalski C. Petrache M. Pfützner S. Pietri Zs. Podolyák W. Prokopowicz D. Rudolph N. Saito T. R. Saito A. Saltarelli G. S. Simpson J. Styczeń N. Vermeulen E. Werner-Malento O. Wieland H. J. Wollersheim M. Zi?bliński 《The European Physical Journal A - Hadrons and Nuclei》2010,43(2):153-158
Reactions of a 16.8 MeV 6He beam with a 9Be target have been investigated using highly segmented detector setup covering a large solid angle. Data on elastic and quasi-free scattering, as well as two-neutron transfer, are reported. The results for elastic scattering are fairly well reproduced by a CDCC calculation, in agreement with the interpretation of a breakup effect already observed for the scattering of 6He on other light targets. Exotic quasi-free scattering of 6He on $ \alpha$ -cluster in 9Be is clearly observed. Inclusive and coincident events were used to extract information on the two-neutron transfer reaction 9Be(6He, $ \alpha$ )11Be . Sequential decay of the 11Be state at the excitation energy $\ensuremath E_x = 10.6$ MeV through different channels is discussed. 相似文献