• Title/Summary/Keyword: Tm3+

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Functions of a-Tropomyosin Are Mainly Dependent upon the Local Structures of the Amino Terminus (a-Tropomyosin의 아미노 말단 구조가 기능에 미치는 영향)

  • Cho, Young-Joon
    • Journal of Life Science
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    • v.14 no.5
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    • pp.770-777
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    • 2004
  • It has been previously reported that unacetylated a-tropomyosin(TM) produced in E. coli failed to bind to actin while acetylated muscle TM and Ala-Ser dipeptide fusion TM (AS-TM) bound well to actin. In order to determine the structural requirement of the amino terminus for high actin affinity, a recombinant tropomyosin (Ala-TM) that a single Ala residue was added to the amino terminus of Ala-TM was constructed, overexpressed, and purified from E. coli. Actin affinity of Ala-TM was 2.3$\times$$10^{6}$$M^{-1}$, whereas that of unacetylated TM was considerably lower than 0.1$\times$$10^{-6}$$M^{-1}$ indicating that addition of a single Ala residue to the amino terminus drastically increased, at least twenty times, actin affinity of TM. Ala-TM, however, bound to actin about three times weaker than acetylated TM and AS- TM, implying that the addition of an Ala residue was insufficient for complete restoration of high actin affinity. While Ala-TM, AS-TM, and muscle TM showed inhibition and activation of actomyosin Sl ATPase activity depending on myosin Sl concentration, the degree of inhibition and activation was different from each other. AS-TM exhibited the greatest inhibition of the ATPase at low Sl concentration, whereas the greatest activation of the ATPase was observed with muscle TM. These results, together with previous findings, strongly suggested that local structure of the amino terminus is the crucial functional determinant of TM.

Bi-directional energy transfer process in Er3+-Tm3+-codoped fluorozirconate glasses

  • Cho, Woon-Jo;Kim, Myong-Wook;Kim, Snag-Hyuck;Jo, Jae-Cheol;Choi, Sang-Sam
    • Journal of the Optical Society of Korea
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    • v.1 no.1
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    • pp.5-9
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    • 1997
  • Energy transfer direction in $Er^{3+}-Tm^{3+}$-codoped fluorozirconate glasses has been studied. For $Er^{3+}-Tm^{3+}$-codoped glasses, the dependence of the green emission intensity on the pump power (Pex) of 800 nm has ranged from (Pex)$^2$ to (Pex)$^3$. From this multistep absorption, a 1.48 $\mu m$ emission from the $^3F_4{\rightarrow}^3H_4$ transition on Tm$^{3+}$ ion has been found to transfer into $^4I_{13/2}$, $^4I_{9/2}$ and $^4S_{3/2}$ on $Er^{3+}$ ion. In case of the 1.06 $\mu m$ pumping, the emissin ratio of $^3H_4$ level in $Tm^{3+}$ to $^4I_{13/2}$ in $Er^{3+}$ showed that the amount of the energy transfer from $Tm^{3+}$ into $Er^{3+}$ increased with the increasing concentration of $Tm^{3+}$ ion. Our two kinds of pumping scheme suggest that the direction of dominant energy transfer between $Er^{3+}$ and $Tm^{3+}$ should be dependent on whether the $^3F_4$ level resonates in $Tm^{3+}$ the level or not.

Effect of Preharvest and Postharvest 1-Methylcyclopropene (1-MCP) Treatments on Fruit Quality Attributes in Cold-stored 'Fuji' Apples (수확 전·후 1-MCP처리가 '후지' 사과의 저온저장 중 과실품질에 미치는 영향)

  • Yoo, Jingi;Kang, Bong Kook;Lee, Jinwook;Kim, Dae Hyun;Lee, Dong Hoon;Jung, Hee-Young;Choi, DongGeun;Choung, Myoung-Gun;Choi, In Myung;Kang, In-Kyu
    • Horticultural Science & Technology
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    • v.33 no.4
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    • pp.542-549
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    • 2015
  • This work was carried out to evaluate the effects of preharvest 1-methylcyclopropene (1-MCP, $Harvista^{TM}$) and postharvest 1-MCP ($SmartFresh^{TM}$) treatments on the fruit quality attributes of cold-stored 'Fuji' ( Malus domestica Borkh.) apples. Fruits were exposed to 0, 95, 125, or $250 mg{\cdot}L^{-1}$ $Harvista^{TM}$ at 3, 2, 1 weeks before harvest (WBH), and treated with 0 or $1{\mu}{\cdot}L^{-1}$ $SmartFresh^{TM}$ at harvest. Fruit was then stored for up to 180 days at $0{\pm}1^{\circ}C$. Fruit fresh weight, Hunter's value a, internal ethylene concentration (IEC), flesh firmness, titratable acidity (TA), and soluble solids content (SSC) in fruit treated with $Harvista^{TM}$ were not different from those of control fruit at harvest. During cold storage, flesh firmness and TA were higher in fruit treated with $250mg{\cdot}L^{-1}$ $Harvista^{TM}$ at 2 and 3 WBH than in control fruit. IEC was 5.5-10.0% lower in fruit treated with $250mg{\cdot}L^{-1}$ $Harvista^{TM}$ at 2 and 3 WBH compared with control fruit as storage duration progressed, while SSC was not affected. Furthermore, flesh firmness, TA, and IEC were affected neither by $Harvista^{TM}$ nor $Harvista^{TM}+SmartFresh^{TM}$ treatments, compared with those fruit quality attributes at harvest. The correlation maps indicated that IEC was negatively correlated with firmness and TA, regardless of $Harvista^{TM}$ application levels. In addition, positive correlations between fruit quality attributes were detected in treatments with $250mg{\cdot}L^{-1}$ $Harvista^{TM}+SmartFresh^{TM}$. Therefore, the results suggest that with a single application of $SmartFresh^{TM}$, a higher level of $Harvista^{TM}$ application would help in retention of fruit quality attributes during cold storage.

Combined Effects of Vanillin and Antibrowning Agent on Changes of Quality and Microorganisms in Fresh-Cut Apples (바닐린과 갈변억제제 병용처리가 신선절단 사과의 품질유지와 미생물증식에 미치는 영향)

  • Chung, Hun-Sik;Toivonen, Peter;Moon, Kwang-Deog
    • Food Science and Preservation
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    • v.15 no.3
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    • pp.385-389
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    • 2008
  • The effects of high vanillin concentration on fresh-cut apples treated with NatureSealTM were investigated Apples were sliced, treated with 6% NatureSealTM or 6% NatureSealTM + 120 mM vanillin, packaged in polyethylene bags, and stored for 3 weeks at 4C. The L value, soluble solid level and titratable acidity of fresh-cut apples treated with NatureSealTM + 120 mM vanillin during storage were lower than those of fresh-cut apples treated with NatureSealTMonly; the growth of total aerobic bacteria, yeast and molds were also more inhibited in fresh-cut apples treated with NatureSealTM + 120 mM vanillin. These results show that the addition of 120 mM vanillin inhibits the growth of microorganism but 1m detrimental effects on the quality characteristics of fresh-cut apples treated with NatureSealTM.

Effect of Dietary Lysophospholipid (LIPIDOLTM) Supplementation on the Improvement of Forage Usage and Growth Performance in Hanwoo Heifer

  • Song, Wan-Sun;Yang, Jinho;Hwang, Il Hwan;Cho, Sangbuem;Choi, Nag-Jin
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.35 no.3
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    • pp.232-237
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    • 2015
  • The present study investigated the effects of Lysophospholipid (LPLs, LIPIDOL$^{TM}$) on the growth performance and nutrient digestibility of Hanwoo heifers. A feeding trial was performed for 120 days until slaughter using a herd of 24 Hanwoo heifers. Eight heifers were assigned to each of 3 experimental groups (control, 0.3% LIPIDOL$^{TM}$ and 0.5% LIPIDOL$^{TM}$). Growth performance, nutrient digestibility, and carcass characteristics were investigated. Significantly improved nutrient digestibility was found in the LIPIDOL$^{TM}$ treatment group compared to the control (p<0.05). No significant effect by LIPIDOL$^{TM}$ supplementation on growth performance was observed (p>0.05). However, interestingly, greater carcass weight was detected in the treatment of LIPIDOL$^{TM}$ where less daily gain was found. Although not a significant effect, greatly decreased back-fat thickness and increased loin area were detected in the treatment of LIPIDOL$^{TM}$. In meat characteristics, LIPIDOL$^{TM}$ increased intramuscular fat and tenderness. Therefore, the present study results suggest that the inclusion of LIPIDOL$^{TM}$ in the diet of Hanwoo heifers can improve carcass performance and meat quality by increasing the carcass index and the meat quality index. The results also suggest that a level of 0.3% might be more efficient than 0.5% with regard to economic effectiveness.

Evaluation of Rapid Diagnostics for Plasmodium falciparum and P. vivax in Mae Sot Malaria Endemic Area, Thailand

  • Chaijaroenkul, Wanna;Wongchai, Thanee;Ruangweerayut, Ronnatrai;Na-Bangchang, Kesara
    • Parasites, Hosts and Diseases
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    • v.49 no.1
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    • pp.33-38
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    • 2011
  • Prompt and accurate diagnosis of malaria is the key to prevent disease morbidity and mortality. This study was carried out to evaluate diagnostic performance of 3 commercial rapid detection tests (RDTs), i.e., Malaria Antigen Pf/Pan$^{TM}$, Malaria Ag-Pf$^{TM}$, and Malaria Ag-Pv$^{TM}$ tests, in comparison with the microscopic and PCR methods. A total of 460 blood samples microscopically positive for Plasmodium falciparum (211 samples), P. vivax (218), mixed with P. falciparum and P. vivax (30), or P. ovale (1), and 124 samples of healthy subjects or patients with other fever-related infections, were collected. The sensitivities of Malaria Ag-Pf$^{TM}$ and Malaria Antigen Pf/Pan$^{TM}$ compared with the microscopic method for P. falciparum or P. vivax detection were 97.6% and 99.0%, or 98.6% and 99.0%, respectively. The specificities of Malaria Ag-Pf$^{TM}$, Malaria Ag-Pv$^{TM}$, and Malaria Antigen Pf/Pan$^{TM}$ were 93.3%,98.8%, and 94.4%, respectively. The sensitivities of Malaria Ag-Pf$^{TM}$, Malaria Antigen Pf/Pan$^{TM}$, and microscopic method, when PCR was used as a reference method for P. falciparum or P. vivax detection were 91.8%, 100%, and 96.7%, or 91.9%,92.6%, and 97.3%, respectively. The specificities of Malaria Ag-Pf$^{TM}$, Malaria Ag-Pv$^{TM}$, Malaria Antigen Pf/Pan$^{TM}$, and microscopic method were 66.2%, 92.7%, 73.9%, and 78.2%, respectively. Results indicated that the diagnostic performances of all the commercial RDTs are satisfactory for application to malaria diagnosis.

The produced mealworm meal through organic wastes as a sustainable protein source for weanling pigs

  • Ko, HanSeo;Kim, YoungHwa;Kim, JinSoo
    • Journal of Animal Science and Technology
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    • v.62 no.3
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    • pp.365-373
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    • 2020
  • This study was designed to evaluate the influence of dietary supplementation of Tenebrio molitor larvae (TM) as an alternative source of protein to fish meal on growth response, retention of nutrient, hematological factors, immune system, and intestinal integrity in weaned pigs. A total of 180 weanling pigs (initial bodyweight of 6.27 ± 0.15 kg; 21 d) were distributed based on the bodyweight between 3 treatments with 6 replicates in each treatment including 10 piglets per replicate. The diets corresponding to treatments consisted of a fish meal diet (CON), a fish meal-dried mealworm diet (TM1, 50% replacement of fish meal with TM meal), and a dried mealworm diet (TM2, 100% replacement of fish meal with TM meal). This study was performed in two phases as phase 1 (d 0 to 14) and phase 2 (d 15 to 28). The pigs in the TM2 treatment showed a greater gain to feed ratio compared with the TM1 pigs in phase 1. Throughout the experimental period, the average daily gain (ADG) of the TM1 pigs was significantly greater than that of the TM2 treatment. The IgG concentration was increased in the TM1 and TM2 treatments compared with the CON pigs in phase 1. In conclusion, the supplementation of TM meal (50% replacement of fish meal) did not show any adverse effects in the performance of weanling pigs, however, 100% replacement of fish meal with TM meal is not recommended.

Topographic Relief Mapping on Inter-tidal Mudflat in Kyongki Bay Area Using Infrared Bands of Multi-temporal Landsat TM Data

  • Lee, Kyu-Sung;Kim, Tae-Hoon
    • Korean Journal of Remote Sensing
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    • v.20 no.3
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    • pp.163-173
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    • 2004
  • The objective of this study is to develop a method to generate micro-relief digital elevation model (DEM) data of the tidal mudflats using multi-temporal Landsat Thematic Mapper (TM) data. Field spectroscopy measurements showed that reflectance of the exposed mudflat, shallow turbid water, and normal coastal water varied by TM band wavelength. Two sets of DEM data of the inter-tidal mudflat area were generated by interpolating several waterlines extracted from multi-temporal TM data acquired at different sea levels. The waterline appearing in the near-infrared band was different from the one in the middle-infrared band. It was found that the waterline in TM band 4 image was the boundary between the shallow turbid water and normal coastal water and used as a second contour line having 50cm water depth in the study area. DEM data generated by using both TM bands 4 and 5 rendered more detailed topographic relief as compared to the one made by using TM band 5 alone.

Synthesis and Defect-Structure Analysis of $ThO_2-Tm_2O_3$ Solid Solutions ($ThO_2-Tm_2O_3$ 고용체의 합성 및 결함구조해석)

  • Don Kim;Chang Kwon Kang;Keu Hong Kim;Jae Shi Choi
    • Journal of the Korean Chemical Society
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    • v.31 no.6
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    • pp.491-497
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    • 1987
  • $ThO_2-Tm_2O_3$ (TDT) solid solutions containing 1,3,5,8,10, and 15 mol% $Tm_2O_3$ were synthesized from spectroscopically pure $ThO_2$ and $Tm_2O_3$ polycrystalline powders. The TDT solid solutions were indentified to the fluorite structure by the X-ray powder technique. The values of the lattice parameter were decreased with increasing amount of $Tm_2O_3$ incorporated. But, there was no linearity for the samples containing 8, 10, and 15 mol% $Tm_2O_3$. It was concluded that these samples became incomplete solid solutions. From the intensity analyses of X-ray diffraction patterns, the residual factor was found below 0.13 even for the 15 mol% TDT system. lt was confirmed from the DTA and TGA analyses that any phase transitions did not occur under the experimental condition executed. Comparing the pycnometric density with the lattice parameter obtained from XRD, it was suggested that the predominant defect model be an oxygen vacancy.

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Efficacy of Aloclair$^{TM}$ for Treatment of Intraoral Ulcer Caused by Orthodontic Appliance (교정장치에 의해 유발된 구내궤양 치료에 대한 Polyvinylpyrrolidone-sodium hyaluronate (Aloclair$^{TM}$)의 임상적 효과)

  • Lee, Ju-Hee;Lee, Sang-Min;Park, In-Young
    • Journal of Dental Rehabilitation and Applied Science
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    • v.28 no.2
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    • pp.109-118
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    • 2012
  • This experimental study was undertaken to evaluate the efficacy of polyvinylpyrrolidone-sodium hyaluronate(Aloclair$^{TM}$) in decreasing pain in orthodontic procedures. A total of 60 patients who were use Aloclair$^{TM}$ ordered to were included. These patients were categorized by 3 cases; 1. Patients who were bonded with their first brackets. 2. Patients who were in pain with additional appliance such as anchorage devices. 3. Patients who got ulcer caused by appliances. We collected information about pain and assessed it using visual analogue scale. According to questionnaire, it took 3.5 min. for pain to subside and pair relief durated for 2.7 hours. Most patients in the study reported rapid pain relief and found Aloclair$^{TM}$ easy and pleasant to use than wax. Accordingly Aloclair$^{TM}$ provided raid relief of resting and provoked ulcer pain.