Title: Zentralblatt für Mikrobiologie

Title: Zentralblatt für Mikrobiologie

Full Journal Title: Zentralblatt fur Mikrobiologie

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? Stelzer, W., Jacob, J. and Schulze, E. (1991), Environmental aspects of Campylobacter infections. Zentralblatt für Mikrobiologie, 146 (1), 3-15.

Abstract: Epidemiological data indicate high incidence of Campylobacteriosis. Improperly prepared poultry-products, unpasteurized milk as well as non-chlorinated drinking water were shown to be the main vehicles of Campylobacter transmission to man. There is a lack of knowledge concerning the role of various environments in transmission of Campylobacter. The review summarizes the present knowledge about occurrence and survival of Campylobacters in various environments (sewage, sludge, surface water, drinking water). In conclusion risk assessment for public health is discussed.

Keywords: Campylobacter, Detection, Drinking Water, Surface Water, Sewage, Survival

Title: Zeolites

ISO Abbreviated Title: Zeolites

JCR Abbreviated Title: Zeolites

ISSN: 0144-2449

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Sano, T., Yamashita, N., Iwami, Y., Takeda, K. and Kawakami, Y. (1996), Estimation of dealumination rate of ZSM-5 zeolite by adsorption of water vapor. Zeolites, 16 (4), 258-264.

Full Text: 1996\Zeolites16, 258.pdf

Abstract: Adsorption isotherms of water were measured at 25°C for HZSM-5 zeolites with various SiO₂/Al₂O₃ ratios. From the analysis of the adsorption isotherms by the D-R method it was found that the micropore volume W_o(H₂O) accessible to water molecules increases linearly with an increase in the framework aluminums and that the number of water molecules associated with one framework aluminum is on average five. Based on these results, the number of the framework aluminums in HZSM-5 zeolites dealuminated by thermal treatment at 600-800°C was estimated. It was found that the rate of the dealumination of HZSM-5 zeolite by thermal treatment is apparently second order depending on the number of framework aluminums in the zeolite structure. It became clear that water molecules are able to be used to determine the number of framework aluminums of the dealuminated HZSM-5 zeolite.

Keywords: Dealumination, Zeolite, ZSM-5, Adsorption, Isotherm, Water

Sayed, S.A. (1996), Removal of Sr²⁺, Ca²⁺, and Mg²⁺ from aqueous and aqueous-alcoholic saline media. Zeolites, 17 (4), 361-364.

Full Text: 1996\Zeolites17, 361.pdf

Abstract: Synthetic inorganic ion exchangers have special uses and can be valuable in some trace separations. Zeolite NaA is used in an ion exchange study with Sr²⁺, Ca²⁺, and Mg²⁺ in aqueous NaCl media of ionic strengths, 1, 2, 3, 4, and 5, and in the oversaturated range of 7 and 10 M. A mixed aqueous methanol, ethanol, n-propyl alcohol, and n-butyl alcohol, 1 m NaCl medium has been investigated with the aim of studying the effect of changing the dielectric constant of the medium on the uptake of the studied cations, Which are present in trace concentrations in caustic soda manufactured by the selective membrane technique. The temperature effect on uptake shows an endothermic character for the exchange reactions under investigation.

Keywords: Exchange, Ion Exchange, Mg²⁺, Nacl Media, Sr²⁺, Zeolite Naa, Zeolites

Choudhary, V.R. and Mayadevi, S. (1996), Adsorption of methane, ethane, ethylene, and carbon dioxide on silicalite-I. Zeolites, 17 (5-6), 501-507.

Full Text: 1996\Zeolites17, 501.pdf

Abstract: The adsorption of methane, ethane, ethylene, and carbon dioxide on silicalite-l and the thermodynamics of adsorption have been investigated under similar conditions using a gravimetric adsorption apparatus. The order for the adsorption of the different adsorbates on silicalite-l is CH₄ < CO₂ < C₂H₄ less than or equal to C₂H₆. The Dubinin-Polanyi equation is found to fit the isotherm data for the adsorption of methane (305 K) and ethane (305-413 K), the Freundlich equation fits the adsorption data for methane (353 K), ethane (453 K), and carbon dioxide (353 K), and the adsorption of ethylene (305, 353 K) and carbon dioxide (305 K) follows the Langmuir isotherm model. The isosteric heat of adsorption for the adsorption of these gases on silicalite-l lies between 18 and 32 kJ . mol^-1, with ethane having the highest value. The heat of sorption is affected mildly by the surface coverage for all of the gases but methane. The heat of adsorption of methane decreases with an increase in its loading. Analysis of the entropy of adsorption reveals that ethane (at an adsorbate loading of <0.8 mmol g^-1), methane, ethylene, and carbon dioxide (at all adsorbate loadings studied) are supermobile on the silicalite surface. The mobility of adsorbed methane increases, and that of the other adsorbates decreases with increasing the adsorbate loading. (C) Elsevier Science Inc. 1996

Keywords: Silicalite-I, Adsorption of Methane, Adsorption of Ethane, Adsorption of Ethylene, Adsorption of Carbon Dioxide, Chromatography Pulse Technique, Gas-Chromatography, Zeolites, NAY

Title: Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi

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ISSN: 1002-1892

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? Dai, G., Yang, K.H. and Li, Q.H. (2000), Bibliometric analysis on tissue engineering research literatures. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 14 (5), 308-310.

Full Text: 2000\Zho Xiu Fu Cho Jia Wai Ke Za Zhi14, 308.pdf

Abstract: OBJECTIVE: To comprehend the progress of tissue engineering research and speculate its developmental trends. METHODS: MEDLINE search was conducted to retrieve the papers published between 1987 to 1999 under the main headings of tissue engineering. Years, nationalities, languages, journals, authors and heading frequencies of 314 papers were analyzed by bibliometrics. RESULTS: Since 1990, the number of tissue engineering research literatures had doubled, and papers between 1998 and 1999 made up 57.96% of the total papers. All papers came from 15 nations, in 6 languages and 140 journals; 64.97% came from United States and 25.79% from England, Netherlands and Germany; 93.95% was in English; 42.04% was published on 15 journals. Vacanti JP and 19 other authors presented 5 to 24 papers. Heading frequencies were cytology 22.89%, transplantation 13.30%, scaffolds and extracellular matrixes 11.72%, implanting 10.60%, polymers 8.91%, potential applications 8.91%, artificial substitutes 6.88%, tissue culture 6.70% and biogenetics 4.96%. CONCLUSION: Tissue engineering literatures mainly come from United States, England, Netherlands and Germany. English is the major language. J Biomed Mater Res and 14 other journals are important journals about tissue engineering research. Vacanti JP and 19 other authors are prolific authors. Cytology, transplantation, scaffolds and extracellular matrixes and implanting are hot topics and key points on tissue engineering research.

Keywords: Analysis, Bibliometrics, Culture, Cytology, Engineering, England, Germany, Journals, Languages, MEDLINE, Methods, Nations, Papers, Polymers, Potential, Research, Scaffolds, Tissue Culture, Transplantation, Trends, United States