Synthesis and characterization of graphite/silicon composites for energy storage in lithium batteries
Category Archives: Year 2013 Issue 11
Effect of aqueous electrolytes on electrochemical capacitor capacitance
Effect of aqueous electrolytes on electrochemical capacitor capacitance
LOTA K., SIERCZYŃSKA A., ACZNIK I., LOTA G.
Please cite as: CHEMIK 2013, 67, 11, 1138–1145
The paper discusses the impact of the aqueous electrolytes on the electrochemical capacitor capacitance using two activated carbons (CA and Norit GSX) and carbon nanotubes. The activated carbon CA (2300 m2/g) showed best electrochemical performance in 1M Na 2SO3 , despite the considerably lower conductivity of the electrolyte in comparison...
Evaluation of the essence of sampling based on the first in Poland proficiency testing for liquefied petroleum gas (LPG) sampling
Evaluation of the essence of sampling based on the first in Poland proficiency testing for liquefied petroleum gas (LPG) sampling
BUKREJEWSKI P ., SKOLNIAK M., FRYDRYCH J.
Please cite as: CHEMIK 2013, 67, 11, 1122–1129
Sampling is a key part of the analytical process and significantly affect the result. One of the key elements to demonstrate competence in the field of laboratory sampling is to participate in proficiency...
Comparison of the insecticidal effectiveness of synthetic and natural myristicin against housefly (Musca domestica L.) and oriental cockroach (Blatta orientalis)
Comparison of the insecticidal effectiveness of synthetic and natural myristicin against housefly (Musca domestica L.) and oriental cockroach (Blatta orientalis).
ŚWIECH K., POŁEĆ I.
Please cite as: CHEMIK 2013, 67, 11, 1115–1120
This study was conducted to investigate and compare biological activity of synthetic myristicin and myristicin isolated from a plant material. The source of „natural” myristicin were seeds and leaves of parsley variety Berliner Half-Long. Biological tests of...
Modern techniques used for biodiversity analysis in bacterial environmental communities
Modern techniques used for biodiversity analysis in bacterial environmental communities
KARŁO A., ZIEMBIŃSKA A.
Please cite as: CHEMIK 2013, 67, 11, 1105–1114
Molecular techniques are very popular in microbial laboratories. Among them FISH- fluorescent in situ hybridization (with modifications like: CARD-FISH, MAR-FISH, RING-FISH, CloneFISH), DGGE – denaturing gradient gel electrophoresis based on 16S rRNA molecular marker and flow cytometry, are the most popular. These analytical methods are commonly use...
Next Generation of Polish Technology to Obtain Bisphenol A – ADVANCE BPA process
Next Generation of Polish Technology to Obtain Bisphenol A – ADVANCE BPA process
KIEDIK M., KUBICA S., CHRUŚCIEL A., HRECZUCH W.
Please cite as: CHEMIK 2013, 67, 11, 1097–1104
This article relates to the new process of technology to manufacture Bisphenol A (BPA), an intermediate for use in the obtaining of polycarbonates and epoxy resins. The described technology is a new version of the BPA production process, which has...
Chemiluminescence – mystery of cold light
Chemiluminescence – mystery of cold light
PODEMSKA K., ORZEŁ A., PODSIADŁY R., SOKOŁOWSKA J.
Please cite as: CHEMIK 2013, 67, 11, 1085–1096
In this paper, selected issue of chemiluminescence process has been presented. The mechanism and requirements for chemiluminescence emission have been considered. The most efficient chemiluminescence systems have been discussed. Chemiluminescence application as an analytical tool in the liquid, gas and solid phase have been presented. Keywords: chemiluminescence,...
Waste management in the oil and gas industry in the light of the new legal regulations
Waste management in the oil and gas industry in the light of the new legal regulations
KRÓL A., KUKULSKA–ZAJĄC E.
Please cite as: CHEMIK 2013, 67, 11, 1079–1084
This article briefly presents binding legal acts on management and procedures for waste from the extractive industry. Moreover, the article presents the most important changes from the amendment to the act on waste from the extractive industry, and areas which require...
Biogas as an alternative to natural gas
Biogas as an alternative to natural gas
HOLEWA J., KRÓL A., KUKULSKA–ZAJĄC E.
Please cite as: CHEMIK 2013, 67, 11, 1073–1078
Necessity of replacing fossil fuels with renewable fuels causes that more and more frequently biogas is considered as a real alternative to natural gas. This article raises problems connected with replacing natural gas with biogas in the process of generation of electric and thermal energy as well as...
Study of poly(methacrylic acid-co-methyl methacrylate) /poly(N-vinyl-2-pyrrolidone) /multi-walled carbon nanotubes nanocomposites
Study of poly(methacrylic acid-co-methyl methacrylate) /poly(N-vinyl-2-pyrrolidone) /multi-walled carbon nanotubes nanocomposites
LIU G., FU Q.
Please cite as: CHEMIK 2013, 67, 11, 1066–1071
Poly(methacrylic acid-co-methyl methacrylate) (P(MAA-coMMA))/poly(N-vinyl-2-pyrrolidone) (PVP)/multiwalled carbon nanotubes (MWNTs) nanocomposites were prepared via ultrasonic assisted emulsifier solution free radical polymerization technique. It was found that, at low concentration of MWNTs, it could uniformly disperse into P(MAA-co-MMA)/PVP blends and provide P(MAA-coMMA)/PVP/MWNTs nanocomposites much improved mechanical properties. Thermal stability for...