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RISS 인기검색어
- 검색키워드
- 저자 : Bogl, Leonie H (검색결과 3 건)
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Wet air oxidation of paracetamol over precious metal/Ti mesh monolith catalyst
Erika Szabados,Gyuri Sági,Ferenc Somodi,Boglárka Maróti,Dávid Srankó,Antal Tungler 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.46 No.-
The catalytic wet oxidation of paracetamol (PAR) was tested with Pt, Ru, Ir containing Ti monolithsmeasuring COD, TOC and TN conversion and compared with that of the non-catalytic reaction. Thedecrease of PAR concentration during reaction was followed by UV–vis spectrometry also. The catalystswere characterized by XPS, PGAA, TPR and SEM-EDX. The monometallic Pt and Ru/Ti catalysts were themost active, even below 150 C. RuO2/Ti had the highest specific activity. After 100 h reaction time the Ptloss was 23%, while the RuO2/Ti kept its Ru content. The RuO2/TiO2 composite formation explains thehighest activity and stability.
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Madhuri Lakhane,Megha Mahabole,Kashinath Bogle,Rajendra Khairnar,Vanja Kokol 한국섬유공학회 2019 Fibers and polymers Vol.20 No.10
Ecologically-friendly and water-stable composite films were prepared by solvent casting process using variableconcentrations (20 and 80 wt %) of de-aluminated (D-ZSM) and Cu (Cu-ZSM) or Fe (Fe-ZSM) ion-exchanged ZSM-5(ZSM) zeolite as adsorbents and 0.6 wt% of cellulose nanofibrils (CNFs) as a matrix, to be used in removal of both cationicand anionic dyes. The films were characterized by spectroscopic (FTIR and XRD), microscopic (SEM), potentiometrictitration, and CO2-adsorption (BET) analysis, and tested for cationic and anionic dyes removal capacity and kinetic via thebatch adsorption process in aqueous buffer solutions. The influence of contact time, initial dye concentration, and pH isinvestigated and evaluated using various isotherm and kinetic models. The Langmuir isotherm is recognized as better fittingmodel for relevant study conditions, and the process follows pseudo-second order kinetic, yielding a monolayer adsorptioncapacity of about 34 mg/g and 16 mg/g for cationic and anionic dyes using D-ZSM/CNF and Fe-ZSM/CNF based films,respectively. Maximum dye removal is observed for a higher (80 wt %) amount of ZSM containing films and pH ≥ 7 vs. pH≤ 7, influencing on electrostatic, physical, and hydrophobic adsorption mechanism. A higher adsorption efficiency of DZSM/CNF film with surface area of 194 m2/g is also related to unevenly distributed and globule-like structures of 40 nmsized D-ZSM, compared to more densely-packed and 72 nm sized platelet/flake-like structures of Cu-ZSM and Fe-ZSMcovering the CNFs surface (7.5 m2/g). The films show potential in removal of differently charged contaminants, thus actingwithin a broader pH range, by being prepared with a combination of suitably modified ZSMs.
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Jelenkovic, Aline,Yokoyama, Yoshie,Sund, Reijo,Honda, Chika,Bogl, Leonie H,Aaltonen, Sari,Ji, Fuling,Ning, Feng,Pang, Zengchang,Ordoñ,ana, Juan R.,Sá,nchez-Romera, Juan F.,Colodro-Conde, L Cambridge University Press 2015 TWIN RESEARCH AND HUMAN GENETICS - Vol.18 No.5
<P>A trend toward greater body size in dizygotic (DZ) than in monozygotic (MZ) twins has been suggested by some but not all studies, and this difference may also vary by age. We analyzed zygosity differences in mean values and variances of height and body mass index (BMI) among male and female twins from infancy to old age. Data were derived from an international database of 54 twin cohorts participating in the COllaborative project of Development of Anthropometrical measures in Twins (CODATwins), and included 842,951 height and BMI measurements from twins aged 1 to 102 years. The results showed that DZ twins were consistently taller than MZ twins, with differences of up to 2.0 cm in childhood and adolescence and up to 0.9 cm in adulthood. Similarly, a greater mean BMI of up to 0.3 kg/m<SUP>2</SUP> in childhood and adolescence and up to 0.2 kg/m<SUP>2</SUP> in adulthood was observed in DZ twins, although the pattern was less consistent. DZ twins presented up to 1.7% greater height and 1.9% greater BMI than MZ twins; these percentage differences were largest in middle and late childhood and decreased with age in both sexes. The variance of height was similar in MZ and DZ twins at most ages. In contrast, the variance of BMI was significantly higher in DZ than in MZ twins, particularly in childhood. In conclusion, DZ twins were generally taller and had greater BMI than MZ twins, but the differences decreased with age in both sexes.</P>
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