• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 춘계학술대회 초록집
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• pp.229.1-229.1
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• 2010

We investigated the effect of chemical acid treatments on hydrogen storage behaviors of the ordered mesoporous carbons (MCs). The surface functional groups and specific elements of the MCs were characterized with Fourier Transform Infrared (FT-IR) spectrometry and X-ray photoelectron spectroscopy (XPS). Also, the changes in the surface functional groups of the MCs were quantitatively detected by Boehm's titration method. The structural properties of the MCs were investigated using X-ray diffraction (XRD). The hydrogen adsorption capacity of the MCs was evaluated by means of adsorption isotherms at 77 K/1 bar. The formation of surface functional groups by the acidic treatments could influence on the hydrogen storage capacity of the MCs.

• Bulletin of the Korean Chemical Society
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• 제27권10호
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• pp.1577-1580
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• 2006

The article reports the synthesis and enantiomeric recognition of a new chiral azophenolic pyridino-18-crown-6 ether, (S,S)-6, possessing diphenyl groups as chiral barriers. The association constants for the enantiomeric recognition of chiral primary amines (7-12) using chiral azophenolic pyridino-18-crown-6 ether, (S,S)-6, were determined by UV-visible titration method in acetonitrile at $25{^{\circ}C}$.

• 미생물학회지
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• 제13권3호
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• pp.91-100
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• 1975

The chemolithoautotrophic bacteria, Freeobacillus ferroxidans and Thiobacillus thiooxidans were identified according to their immunological and serological properties. The antibody to these organisms was easily elicited in experimental animals, however, the overall serologicl reactivities were low according to different kinds of titration methods. By means of the quantitive and qualitative analysis such as hemagglutination or ouchterlony tests, F.ferroxidans and T. thiooxidans were different in their immunoreactivities, whereas the strains among the F.ferrooxidans were possessed, in some extent, the sharing antigenic determinants. In the results of the polyacrylamide gel electrophoresis/radioimmunometric method, the major antigenic determinants of the organisms illustrated the type specificitles in the fraction number of 20-30 in their gel electrophoretograms with some modifications of the antigenic moieties.

• Parasites, Hosts and Diseases
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• 제34권2호
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• pp.155-157
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• 1996

쥐와포자충(MCR주)을 장기간에 걸쳐 그 생명을 유지시키기 위하여 냉동 보존을 시도하였다. 그 오오시스트를 냉동보호제를 첨가하지 않고 증류수에 현탁시켜 $-20^{\circ}C$에서 24시간 예비냉각시킨 다음 $-70^{\circ}C$에 냉동보존하였다. 냉동 오오시스트를 $5^\circ}C$에서 해동시켜 마우스에 접종시킨 바 15개월간 냉동보존시켜토 사멸하지 않고 마우스에의 감염성이 유지되었다. 한편, 2.5% 중크롬산칼륨에 현탁시켜 6.5개월간 $5^{\circ}C$에 냉장한 오오시스트는 이미 사멸하여 감염성이 소실되었다.

• 대한화학회지
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• 제56권5호
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• pp.563-570
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• 2012

Solid acid Mo(VI)/$ZrO_2$ with 2-10% Mo(VI) was coated on honeycomb monoliths by impregnation method. These catalytic materials were characterized by BET, $NH_3$-TPD/n-butylamine back titration, PXRD and SEM techniques. Phenyl salicylate (Salol) was synthesized via transesterification of methyl salicylate and phenol over these catalytic materials. An excellent yield (91.0%) of salol was obtained under specific reaction conditions. The effect of poisoning of acid sites of the catalytic material by adsorbing different bases and its effect on total surface acidity, powder XRD phases and catalytic activity was studied. A triangular correlation between the surface acidity, powder XRD phases and catalytic activity of Mo(VI)/$ZrO_2$ was observed. The thermally regenerated catalytic material was reused repeatedly with a consistent high yield of salol.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.304-304
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• 2009

In this study, the adsorption behaviors of mercury ions on the electroless Cu-plated activated carbons have been investigated. The amount of copper on activated carbons have been confirmed by atomic absorption spectrophotometer (AAS). The surface properties of the ACs studied have been characterized by using Boehm's titration method and scanning electron microscopy (SEM).Experimental results showed the adsorption capacity of mercury ions was increased as the electroless Cu plating. This was probably due to the introduction of copper on ACs leaded to an increase in the surface basicity.

• 한국작물학회지
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• 제47권4호
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• pp.301-304
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• 2002

The variation of alternative and cytochrome respiration during ripening in rice leaves (Oryza sativa L. cv. Takanari) was examined. The capacity of both respiration pathway was measured by inhibitor titration method using gas-phase oxygen electrodes. The alternative respiration rate decreased from 31.3% of the total respiration rate at around heading to 11.7% at 34 days after heading in the first fully expanded leaf from the top, and further to 6.4 % at 34 days after heading in the fourth leaf from the top. In contrast, the proportion of cytochrome respiration to total respiration increased with leaf senescence. The possible cause of alternative respiration as either an increase in inefficient respiration or a decrease in growth efficiency during ripening was discussed.

• 한국염색가공학회지
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• 제12권4호
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• pp.233-238
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• 2000

In this study, the control system of sodium hydroxide was demonstrated to systemize hydrolysis process in polyester dyeing. We mainly focused on the application method of acid-alkali titration for the polyester hydrolysis machine of liquor-flow type. Industrial pH meter with electrode type was used for identifying equivalence point. Three units which were analogue-to-digital card, microprocessor and digital output card were used to control NaOH concentration in the control part of the system. The yielded data are translated to the microprocessor through analogue-digital interfacing card. After calculating, NaOH concentration in NaOH storage tank was controlled through the digital output card and solenoid valves.

• Bulletin of the Korean Chemical Society
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• 제30권8호
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• pp.1743-1748
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• 2009

Novel 2-aminothiazolinium based tripodal receptors were designed and synthesized. The binding property of these receptors toward various anions was investigated by the isothermal titration calorimetry (ITC) method. Receptor 4 recognized the acetate anion with 1:1 stoichiometry, whereas it bound the other oxoanions such as sulfate and phosphate in complex modes. By modifying the phenyl groups at the 4-position of the thiazoline rings of the tripodal receptor 4 to induce a mutual aromatic stacking interaction among the three ligands, receptor 10 showed totally different binding behavior, which gave rise to the 1:1 binding mode for the sulfate anion. This result was confirmed by ESI MS spectrometry.

• Archives of Pharmacal Research
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• 제4권2호
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• pp.99-107
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• 1981

To investigate the protein binding characteristics of ibuprofenlysine, the effects of drub conentration, pH, ionic strength and protein concentration on the binding of drug to protein concentration on the binding of drug to protein were studied by fluorescence probe method. The conformational change of protein was investigated by circular dichroism (CD) measurement. As the concentration of drug increases, the association constant decreases. These may be due to complex formation of the probe and drug, or the interaction of the protein-probe complex and drug. The association constant for ibuprofenlysine increased with increasing protein concentration. These finding suggest a sharing of one ibuprofenlysine molecule by more than one protein molecule in the binding. The binding between ibuprofenlysine and protein was dependent on pH and ionic strength. It seems that both hydrophobic binding and some electrostatic forces are involved in the binding of ibuprofenlysing to protein.