• Title/Summary/Keyword: CL/P

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Cycloplatinated Complexes of Thiosemicarbazones. Synthesis and Crystal Structure of [$Ph_2PC_6H_4CHNNC(S)NHCH_3PtCl$]

  • 유동원;강상욱;고재정;최문근
    • Bulletin of the Korean Chemical Society
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    • v.18 no.3
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    • pp.305-310
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    • 1997
  • The synthesis and characterization of the platinum heterocyclic carboxaldehyde thiosemicarbazone complexes [NC5H4CRNNC(S)NHR'PtCl] (R=H, R'=CH3(1); R=CH3, R'=CH3(2); R=CH3, R=H(3)) and diphenylphosphinophenyl carboxaldehyde thiosemicarbazone complexes [Ph2PC6H4CHNNC(S)NHRPtCl] (R=CH3(5); R=iC3H7(6); R=Ph(7)) are described. Compounds 1-3 were prepared by reaction of Pt(SEt2)2Cl2 with 2-acetylpyridine-4-alkylthiosemicarbazone in the presence of NEt3. Compounds 5-7 were prepared using Pt(SEt2)2Cl2 in toluene with diphenylphosphinophenyl carboxaldehyde alkylthiosemicarbazone. The compounds have been characterized by microanalysis, NMR (1H, 13C, 31P) spectroscopy, and single-crystal X-ray diffraction. X-ray single crystal diffraction analysis reveals that compound 5 is a mononuclear platinum compound with P,N,S-coordination mode.

The Characteristics of Magnetic of Ni-Zn Ferrite dependent on pH (pH에 따른 Ni-Zn 페라이트의 자기적 특성)

  • 김한근;사공건
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1993.11a
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    • pp.124-127
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    • 1993
  • In this paper, the magnetic properties of Ni-Zn ferrite powders dependent on pH have been studied. Ni-Zn ferrite powders were synthesized by coprecipitation method(pH were 7. 9. 11 and 13. respetively) using FeCl$_3$$.$ 6H$_2$O, NiCl$_2$$.$6H$_2$O and ZnCl$_2$as starting materials and its powders were calcined at 1,000($^{\circ}C$). The saturated magnetizations of the Ni-Zn ferrite powders dependent on various pH. such as 7, 9, 11 and 13 were 11.44, 29.77, 69.62 and 66.75(emu/g), respetively.

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The Effects of Addition Timing of NaCl and Sodium Tripolyphosphate and Cooking Rate on Pink Color in Cooked Ground Chicken Breasts

  • Bae, Su Min;Cho, Min Guk;Jeong, Jong Youn
    • Food Science of Animal Resources
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    • v.40 no.2
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    • pp.231-241
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    • 2020
  • The current study investigated the effects of timing of NaCl (2%) and sodium tripolyphosphate (STPP, 0.5%) addition and cooking rates on color and pigment properties of ground chicken breasts. Four treatments were tested as follows: treatment 1, no NaCl and STPP added and stored for 7 d; treatment 2, NaCl+STPP added on 0 d and stored for 7 d; treatment 3, NaCl added on 0 d and STPP added on 7 d; and treatment 4, stored for 7 d and NaCl+STPP added. All samples were cooked at a fast (5.67℃/min) or slow cooking rate (2.16℃/min). Regardless of the timing of NaCl and STPP addition, reflectance ratios of nitrosyl hemochrome, cooking yield, pH values, oxidation-reduction potential, and percent myoglobin denaturation were similar (p>0.05) across treatments 2, 3, and 4. The highest CIE a values were observed in treatment 4 (p<0.05), while treatment 2 was effective in reducing the redness in cooked chicken products. The fast cooking rate resulted in lower CIE a values and higher CIE L values and cooking yield in cooked chicken breasts compared to the slow cooking rate. Our results indicate that adding NaCl and STPP to meat, followed by storing and cooking at a fast rate, may result in inhibiting the pink color defect sporadically occurred in cooked ground chicken breasts.

An ESR Study of Amino Acid and Protein Free Radicals in Solution Part VI. Enzymatic Inactivation of Lysozyme in Aqueous Solution Resulting from Exposure to $Ti-H_2O_2$ System and Gamma-Irradiation

  • Hong, Sun-Joo;Piette, L.H.
    • Journal of the Korean Chemical Society
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    • v.16 no.2
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    • pp.80-83
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    • 1972
  • The activity change of lysozyme resulted from its exposure to $Ti-H_2O_2$system in aqueous liquid at room temperature and to ${\gamma}$-irradiation in ice at $195^{\circ}K$ has been measured at room temperature with a Cary-14 spectrophotometer. The enzymatic activity of lysozyme which had been added to a previously flow-mixed solution of $TiCl_3$ and $H_2O_2$ (System I) was compared with the activity of a lysozyme-$H_2O_2$ solution after flow-mixing with $TiCl_3$ (System II), considering the differences between these two activity changes as the extent of the enzymatic inactivation by the involvement of OH radical reaction. The fraction of lysozyme inactivated by OH radical in the system containing 0.0025 M $TiCl_3-0.1M$ $H_2O_2$ (ph 3.5) was 13%, When the $TiCl_3$ concentration is double (pH 3.0), the fraction of enzyme inactivated increases to 36%. The activity of the system containing 0.025 M $TiCl_3-0.1$ M $H_2O_2$ (pH 1.5) was essentially zero. The results seem to support the previos view that the production of OH radical should be proportional to $TiCl_3$ concentration when $H_2O_2$ is present in excess. Increase in the extent of inactivation found in system I with increasing $TiCl_3$ concentration may be due to a pH effect. $H_2O_2$ seems to be less effective than $TiCl_3$ in the inactivation. 1% lysozyme solution, when ${\gamma}$-irradiated with a total dose of 3M rads, loses about 20% of its activity. Lowering of temperature also was found to yield a reduction in enzymatic activity.

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Characteristics of Electrolyzed Water Manufactured from Various Electrolytic Diaphragm and Electrolyte (전기분해 격막 및 전해액에 따른 전해수의 특성 비교)

  • 정진웅;김종훈;김병삼;정승원
    • Food Science and Preservation
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    • v.10 no.1
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    • pp.99-105
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    • 2003
  • This study was carried out to investigate the efficacy of surface sterilization and the physicochemical properties of electrolyzed water manufactured from various electrolytic diaphragm and electrolyte. Physical properties of electrolyzed water manufactured from the diaphragm system were the most effective at the following conditions; the distance between diaphragms was 1.0 mm and the supplying rate of 20% NaCl was 6 mL/min. The ORP, HClO content and pH at above conditions were 1,170 mV, 100 ppm and 2.5, respectively. And two stage electrolyzed system was more effective than one stage electrolyzed water manufactured from non-diaphragm system, with 4 mL/min supplying rate of 20% NaCl, was similar to the most effective diaphragm system. But ORP, HClO content and pH were abut 800 mV, 200 ppm and 9 level, respectively. Sealed electrolyzed water could be preserved more than one month at room temperature with ORP of 750 mV in non-diaphragm system and 1,150 mV in diaphragm system, and HClO content of 100 ppm. Twelve kinds of microorganism tested were sterilized within 30 seconds from initial total counts of 10$\^$5/∼10$\^$6/cfu/ml by electrolyzed water. Though the ORP and HCIO contents of electrolyzed water manufactured from various electrolyte were higher in order of NaCl>KCl>CaCl$_2$, there were no difference between the electyolytes in the efficacy of sterilization. Salmonella typhi and Vibrio Proteolyticus were also sterilized by electrolyzed water manufactured from elctrolytes of NaCl CaC1$_2$and KCl

Evaluation of the Removal Properties of Mn(II) by Manganese-Coated Sand (망간사에 의한 망간제거 특성 평가)

  • Yu, Mok-Ryun;Yang, Jae-Kyu;Kim, Mu-Nui;Lee, Seung-Mok;Lee, Nam-Hee
    • Journal of Korean Society of Environmental Engineers
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    • v.29 no.5
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    • pp.571-576
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    • 2007
  • Manganese-Coated Sand(MCS) prepared with three different methods were applied in the treatment of soluble $Mn^{2+}$ in batch and column experiments. In the bench-scale MCS preparation, the coating efficiency of manganese on the surface of sand increased as the dosage of initial Mn(II) increased. The removed amount of the soluble $Mn^{2+}$ by MCS increased as the solution pH increased, following a typical anionic-type adsorption. The removed amounts of the soluble $Mn^{2+}$ through adsorption was quite similar over the entire pH range, without depending on the contents of Mn on the surface of sand as well as coating methods. When NaClO was used an oxidant, the removed amount of the soluble $Mn^{2+}$ by MCS increased as the concentration of NaClO increased, This trend might be explained by the increased removal efficiency through coating of manganese oxides produced from oxidation of the soluble $Mn^{2+}$ by NaClO on the surface of MCS. From the bench-scale column experiments, the breakthrough of $Mn^{2+}$ occurred after 4,100 bed volume without presence of NaClO while 1.6-times delayed breakthrough of $Mn^{2+}$ was observed in the presence of NaClO. This result also supports that the removal efficiency of the soluble $Mn^{2+}$ could be enhanced by using NaClO.

Study on the Anti-Aging Activity of Chrysanthemum lucidum Exosomes (울릉국화 엑소좀의 항노화 활성 효과 연구)

  • Min-Ha Kim;Eun Jung Yoon;Jung Soo Kim;So Hyun Bae;Na Young Choi;Si Jun Park;Hyun Sang Lee
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.50 no.3
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    • pp.289-299
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    • 2024
  • Chrysanthemum lucidum (C. lucidum), a perennial herb in the Asteraceae family, is an endemic species found only on Ulleung island in Gyeongsangbuk-do, South Korea. Previous studies have reported that the extract of C. lucidum exhibits excellent antioxidant activity due to its high polyphenol and flavonoid content. However, the anti-aging effects of C. lucidum extract, such as wrinkle improvement and cell regeneration, are not well known, and there has been no research on the activity of C. lucidum-derived extracellular vesicles (ClDEVs). Therefore, this study aimed to verify the anti-aging effects of ClDEVs through in vitro and clinical analyses. In cell experiments, ClDEVs promoted cell regeneration, increased the expression of COL1A1, a gene involved in collagen synthesis, and enhanced the expression of FLG and LOR, a biomarker related to skin barrier improvement. Additionally, ClDEVs suppressed the expression of aging-related biomarkers, such as the CDKN2A (encodes p16) and TP53 (encodes p53) genes, in cells induced to age. In a human clinical trial, after using a cosmetic product containing ClDEVs for 4 weeks, significant improvement in wrinkles around the eyes and nasolabial folds was observed. In conclusion, ClDEVs have demonstrated high potential as a bio-cosmetic ingredient for wrinkle improvement and anti-aging.

The Surface Damage of SBT Thin Film Etched in Cl2CF4/Ar Plasma (Cl2CF4/Ar 유도결합 플라즈마에 의해 식각된 SBT 박막의 표면 손상)

  • 김동표;김창일;이철인;김태형;이원재;유병곤
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.15 no.7
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    • pp.570-575
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    • 2002
  • $SrBi_2Ta_2O_9$ thin films were etched in $Cl_2/CF_4/Ar$ inductively coupled plasma (ICP). The maximum etch rate was 1300 ${\AA}/min$ at 900 W ICP power in Cl$_2$(20%)/$CF_4$(20%)/Ar(60%). As RF source power increased, radicals (F, Cl) and ion ($Ar^+$) increased. The influence of plasma induced damage during etching process was investigated in terms of P-E hysteresis loops, chemical states on the surface, surface morphology and phase of X-ray diffraction. The chemical states on the etched surface were investigated with X-ray spectroscopy and secondary ion mass spectrometry. After annealing $700^{\circ}C$ for 1 h in $O_2$ atmosphere, the decreased P-E hysteresises of the etched SBT thin films in Ar and $Cl_2/CF_4/Ar$ plasma were recovered.

Polymeric Membrane and Solid Contact Electrodes Based on Schiff Base Complexes of Co(III) for Potentiometric Determination of Perchlorate Ions

  • Soleymanpour, Ahmad;Hanifi, Abdolghafoor;Kyanfar, Ali Hossein
    • Bulletin of the Korean Chemical Society
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    • v.29 no.9
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    • pp.1774-1780
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    • 2008
  • New PVC based polymeric membrane electrodes (PME) and coated glassy carbon electrodes (CGCE) based on synthesized Schiff base complexes of Co(III); [Co(Salen)$(PBu_3)_2$]$ClO_4$, [Co($Me_2$Salen)$(PBu_3)_2$]$ClO_4$, [Co(Salen)$(PBu_3)H_2O$]$ClO_4$; as anion carriers for potentiometric determination of $ClO_4\;^-$were studied. The PME and also CGCE electrodes prepared with [Co(Me2Salen)$(PBu_3)_2$]$ClO_4$ showed excellent response characteristics to perchlorate ions. The electrodes exhibited Nernstian responses to $ClO_4\;^-$ ions over a wide concentration range with low detection limits ($1.0 {\times} 10^{-6}\;mol\;L^{-1}$ for PME and $9.0 {\times} 10^{-7}\;mol\;L^{-1}$ for CGCE). The electrodes possess fast response time, satisfactory reproducibility, appropriate lifetime and, most importantly, good selectivity toward $ClO_4\;^-$ relative to a variety of other common inorganic anions. The potentiometric response of the electrodes is independent of the pH in the pH range 2.5-8.5. The proposed sensors were used in potentiometric determination of perchlorate ions in mineral water and urine samples. The interaction of the ionophore with perchlorate ions was shown by UV/Vis spectroscopy.

A Study of the Dry Etching Properties of TiN Thin Film in He/BCl3/Cl2 Inductively Coupled Plasma (He/BCl3/Cl2유도결합 플라즈마를 이용한 TiN 박막의 식각 특성)

  • Woo, Jong-Chang;Joo, Young-Hee;Park, Jung-Soo;Kim, Chang-Il
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.24 no.9
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    • pp.718-722
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    • 2011
  • In this work, we investigated to the etching characteristics of the TiN thin film in He/$BCl_3/Cl_2$ plasma. The etch rate was measured by the gas mixing ratio, the RF power, the DC bias voltage and the process pressure. The maximum etch rate in He/$BCl_3/Cl_2$ plasma was 59 nm/min. The etch rate increased as the RF power and the DC-bias voltage was increased. The chemical reaction on the surface of the etched the TiN thin films was investigated with X-ray photoelectron spectroscopy (XPS). The intensity of Ti 2p and N 1s peaks are varied during etching process. A new peak was appeared in He/$BCl_3/Cl_2$ plasma. The new peak was revealed Ti-$Cl_x$ by Cl 2p peak of XPS wild scan spectra analysis.