Pan-Gi Kim

Seoul National University of Technology, Sŏul, Seoul, South Korea

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Publications (29)20.43 Total impact

  • Inorganic Chemistry Communications 08/2013; 36(2013):72-76. · 2.02 Impact Factor
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    ABSTRACT: This study aimed to investigate the growth and physiological characters of Liriodendron tulipifera seedlings in responses to two different levels of elevated air temperature and concentration. The seedlings were grown in environment-controlled growth chambers with two combinations of air temperature and conditions: (1) + ambient and (2) + . Physiological characters such as growth, photosynthesis, and water use efficiency, were monitored for 85 days. The seedlings under the elevated treatment showed a greater amount of growth in tree height, compared with those under the control. Regarding the characteristics of assimilatory organs, the elevated treatment resulted in a greater amount of total leaf area, leaf unfolding, and dry weight per leaf area. No significant differences were found in photosynthesis capacity between the two treatments. The increase in water use efficiency with increased intercellular partial pressure appeared overall lower in the seedling under the elevated treatment, compared with those under the control. The total leaf area of the seedlings under the elevated treatment was larger than that under the control, indicating a higher amount of photosynthesis. In addition, an increase of root growth was noted under the elevated treatment. A resistance mechanism of water stress may be attributed to a higher amount of organ growth as well as the tree height under the elevated treatment than the control.
    Korean Journal of Agricultural and Forest Meteorology. 01/2013; 15(3).
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    ABSTRACT: The asymmetric unit of the title compound, [Mn(CHO)(HO)]·CHN·2HO, contains half of the centrosymmetric Mn complex dimer, half of a 1,2-bis-(pyridin-4-yl)ethene mol-ecule, which lies across an inversion center, and one water mol-ecule. Two citrate ligands bridge two Mn ions, and each Mn atom is coordinated by four O atoms from the citrate ligands (one from hy-droxy and three from carboxyl-ate groups) and two water O atoms, forming a distorted octa-hedral environment. In the crystal, O-H⋯O and O-H⋯N hydrogen bonds link the centrosymmetric dimers and lattice water mol-ecules into a three-dimensional structure which is further stabilized by inter-molecular π-π inter-actions [centroid-centroid distance = 3.959 (2) Å]. Weak C-H⋯O hydrogen bonding interactions are also observed.
    Acta Crystallographica Section E Structure Reports Online 12/2012; 68(Pt 12):m1516-7. · 0.35 Impact Factor
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    ABSTRACT: The asymmetric unit of the title compound, [Zn(2)(C(6)H(6)O(7))(2)(H(2)O)(4)]·C(12)H(10)N(2)·2H(2)O, comprises half of a centrosymmetric complex dimer, half of a 1,2-bis-(pyridin-4-yl)ethene mol-ecule, which lies across an inversion centre, and one lattice water mol-ecule. Carboxyl-ate groups of two dianionic citrate ligands bridge two Zn(II) ions to give the cyclic dimer, with each Zn(II) ion coordinated by four O atoms from the chelating citrate ligand (one hy-droxy and three carboxyl-ate, with one bridging) and two water O atoms, forming a distorted octa-hedral environment [Zn-O = 2.040 (3)-2.244 (3) Å]. In the crystal, O-H⋯O and O-H⋯N hydrogen bonds involving hy-droxy groups and both coordinating and lattice water mol-ecules link the dimers to give a three-dimensional framework structure.
    Acta Crystallographica Section E Structure Reports Online 10/2012; 68(Pt 10):m1305-6. · 0.35 Impact Factor
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    ABSTRACT: The asymmetric unit of the title compound, [Mn(2)(C(6)H(6)O(7))(2)(H(2)O)(4)]·C(12)H(12)N(2)·2H(2)O, comprises half of a centrosymmetric dimer, half of a 1,2-bis-(pyridin-4-yl)ethane and one water mol-ecule. Two citrate ligands bridge two Mn(II) ions, the Mn(II) ion being coordinated by four O atoms from the citrate(2-) ligands and two water O atoms, forming a distorted octa-hedral environment. In the crystal, O-H⋯O hydrogen bonds link the centrosymmetric dimers and lattice water mol-ecules into a three-dimensional structure which is further stabilized by inter-molecular π-π inter-actions [centroid-centroid distance = 3.792 (2) Å].
    Acta Crystallographica Section E Structure Reports Online 08/2012; 68(Pt 8):m1116-7. · 0.35 Impact Factor
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    ABSTRACT: This study was carried out to investigate the effect of slurry composting and biofiltration (SCB) liquid fertilizer amendment on the growth, photosynthetic rate, stomatal conductance, transpiration rate, heavy metal uptake and pigment concentration of Populus alba × glandulosa grown on Cd-and Pb-contaminated soil. Plants were grown under four test conditions: control, Cd-Pb treatment, SCB fertilization and combination of Cd-Pb treatment and SCB liquid fertilization. SCB fertilization enhanced the above-ground dry matter of P. alba × glandulosa grown in Cd-Pb treated soil. On the other hand, physiological parameters such as photosynthetic rate, stomatal conductance and transpiration rate of Cd-and Pb-treated seedlings showed lower values than those seedlings grown under controlled condition. Higher contents of photosynthetic pigment were observed in the leaves of SCB-treated seedlings and the positive effect of SCB fertilization on Cd uptake implying phytoextraction potential of Cd, but not with Pb which was considered less mobile in soil. In conclusion, the application of SCB liquid fertilizer significantly affected the mobility and bioavailability of metals in soil as reflected in the altered Cd and Pb uptake, which in turn affected the phytoextraction potential of P. alba × glandulosa grown in Cd-Pb treated soil.
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    ABSTRACT: In the title compound, [Co(C(7)H(3)Cl(2)O(2))(2)(C(10)H(8)N(2))(CH(3)OH)(2)](n), the Co(II) ion lies on a twofold rotation axis and is in a slightly distorted octa-hedral CdO(4)N(2) environment, formed by two O atoms from monodentate dichloro-benzoate ligands, two O atoms from methanol ligands, and two N atoms from trans-related 4,4'-bipyridine ligands. The bipyridine ligands also lies on a twofold rotation axis and bridge the Co(II) ions, forming chains extending along [010]. An intra-chain O-H⋯O hydrogen bond is observed.
    Acta Crystallographica Section E Structure Reports Online 12/2011; 67(Pt 12):m1705. · 0.35 Impact Factor
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    ABSTRACT: In the title complex, [Ni(C(10)H(6)NO(2))(2)(CH(3)OH)(2)], the Ni(II) ion lies on an inversion center and is coordinated by two quinoline-2-carboxyl-ate ligands in the equatorial sites and two axial methanol ligands, forming a distorted octa-hedral environment. In the crystal, mol-ecules are linked via O-H⋯O hydrogen bonds into a two-dimensional network parallel to (10[Formula: see text]).
    Acta Crystallographica Section E Structure Reports Online 11/2011; 67(Pt 11):m1511. · 0.35 Impact Factor
  • Ki Woo Kim, Do-Hyun Cho, Pan-Gi Kim
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    ABSTRACT: Morphology of foliar trichomes was analyzed in Quercus variabilis by electron microscopy and three-dimensional surface profiling. Leaves from suppressed or dominant sprouts of the oak species were collected after a forest fire to unravel the effects of the disturbance factor on sprouting of the oak species. Scanning electron microscopy revealed two types of trichomes depending on the leaf surface. The trichomes on the adaxial surface were branched and constricted, and possessed a single row of thin-walled cells with a collapsed morphology (glandular branched uniseriate trichomes). Meanwhile, the trichomes on the abaxial surface were star-shaped, unfused with each other, and had 6 to 10 rays (nonglandular simple stellate trichomes). An apparent proliferation of trichomes was evident on the adaxial surface of the dominant sprouts. Uniseriate trichomes could be discernable as an elevation from the surface by white light scanning interferometry. By transmission electron microscopy, thin and convoluted cell wall, degenerated cytoplasm, and a single row of cells were characteristic of the trichomes on the adaxial surface. The thick cell walls of the mature trichomes on the abaxial surface represented the nonglandular nature. This is the first report on the morphological and ultrastructural characterization of foliar trichomes of the oak species.
    Microscopy and Microanalysis 06/2011; 17(3):461-8. · 2.50 Impact Factor
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    ABSTRACT: 3D surface profiling and high resolution imaging were performed to refine the Florin rings and epicuticular wax crystals of Pinus koraiensis needles. Needles were collected from four-year-old seedlings and air-dried for surface observations. Field emission scanning electron microscopy revealed that stomata were found on the abaxial (lower) surface of needles. Measured as ca. 40 μm long, they were largely elliptical or oval-shaped. Epicuticular wax crystals were present in the epistomatal chambers as well as on the surrounding epidermis. Rodlets were prevalently found on the stomatal bands and furrows as well as within the epistomatal chambers. The presence of wax tubules was ascertained by the distinct terminal openings at their ends. The occurrence of wax ridges was evident on the epidermis near the saw-tooth margins (nonstomatal areas). No distinct wax ridges were detected on the dewaxed needles. Raised Florin rings were distinct on the stomata. White light scanning interferometry showed that the diameter and width of stomata were ca. 44.02 ± 3.33 μm and 32.10 ± 3.30 μm, respectively. Measured from the neighboring epidermis to the stomatal aperture, the mean height of the stoma reached ca. 6.23 ± 1.28 μm. Focus variation metrology allowed measuring the mean elevation angle of the stoma, reaching ca. 41.41 ± 11.25°. This is the first report on a novel approach to the establishment of quantitative criteria of Florin ring classification by nontactile 3D surface profiling beyond the previous qualitative descriptions of Florin rings of coniferous species.
    Microscopy Research and Technique 05/2011; 74(12):1166-73. · 1.59 Impact Factor
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    ABSTRACT: In the title compound, {[Ni(C(12)H(10)N(2))(H(2)O)(4)](NO(3))(2)}(n), the Ni(II) ion, lying on a crystallographic inversion center, has a distorted octa-hedral coordination sphere comprising four water ligands and two N-atom donors from the trans-related 1,2-bis-(4-pyrid-yl)ethene ligands, which also have crystallographic inversion symmetry. These ligands bridge the Ni(II) complex units, forming chains extending along the [110] and [[Formula: see text]10] directions. The nitrate counter-anions stabilize the crystal structure through water-nitrate O-H⋯O hydrogen bonds.
    Acta Crystallographica Section E Structure Reports Online 04/2011; 67(Pt 4):m390. · 0.35 Impact Factor
  • Ki Woo Kim, Kyosang Koo, Pan-Gi Kim
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    ABSTRACT: Effects of seawater spray on leaf structure were investigated in Quercus acutissima by electron microscopy and X-ray microanalysis. Two-year-old seedlings of Q. acutissima were sprayed with seawater and kept in a greenhouse maintained at 25°C. The most recognizable symptoms of seawater-sprayed seedlings included leaf necrosis, crystal deposition, stomatal clogging, and chloroplast degeneration. Field emission scanning electron microscopy revealed that the leaf surface was covered with additional layers of remnants of seawater spray. Composed of sodium and chloride, cube-shaped crystals (halite) were prevalently found on trichomes and epidermis, and formed aggregates. Meanwhile, wedge-shaped crystals were deposited on epidermis and consisted of calcium and sulfur. As a result of stomatal clogging by crystal deposition on the abaxial surface, it was conceivable that plant respiration became severely hampered. Transmission electron microscopy showed degenerated cytoplasm of seawater-sprayed leaves. It was common to observe severe plasmolysis and disrupted chloroplasts with a reduced number of thylakoids in grana. These results indicate that foliar applications of seawater were sufficient to induce necrosis of Q. acutissima seedlings as an abiotic disturbance factor.
    Microscopy Research and Technique 10/2010; 74(5):449-56. · 1.59 Impact Factor
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    ABSTRACT: Three-dimensional surface topography of needle stomatal complexes was investigated in Pinus rigida, Pinus taeda, and their interspecific hybrid Pinus rigitaeda. The stomatal complexes of P. rigida appeared to be sunken and ca. 15 microm deep by white light scanning interferometry. Stomatal grooves were evident in P. taeda along the stomata and amounted to ca. 5 microm deep. The centers of stomata maintained the similar height to the stomatal apertures. Meanwhile, the stomatal complexes of P. rigitaeda (ca. 15 microm deep) were characterized by distinct stomatal grooves and sunken stomatal chambers. In addition, field emission scanning electron microscopy revealed the stomatal complexes of P. rigida partially filled with epicuticular waxes. It was common to observe distinct stomatal grooves and chamber-filled stomata on P. taeda needles. The stomatal complexes of P. rigitaeda had the distinct stomatal grooves and were partially filled with wax tubules and rodlets. Surface roughness measurements of stomatal complexes showed higher levels of roughness from P. rigida and P. rigitaeda than that from P. taeda. These results indicate that the hybrid species P. rigitaeda showed intermediacy in surface characteristics between the parent species, suggesting the genetic control of needle stomatal complexes in the hybrid species.
    Micron 08/2010; 41(6):571-6. · 1.88 Impact Factor
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    ABSTRACT: In the title compound, [Zn(C(7)H(5)O(2))(2)(C(10)H(10)N(2))(2)], the Zn(II) ion, located on a twofold axis, is coordinated by two N atoms from two 3-(pyrrol-1-ylmeth-yl)pyridine ligands and two O atoms from two benzoate ligands in a distorted tetra-hedral geometry. The pyridine and the pyrrole rings are nearly perpendicular to each other, making a dihedral angle of 84.83 (7)°.
    Acta Crystallographica Section E Structure Reports Online 01/2010; 66(Pt 8):m980. · 0.35 Impact Factor
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    ABSTRACT: The title compound, [Ni(C(11)H(10)N(2)O(2))(2)](C(7)H(5)O(2))(2), consists of an Ni(II) ion coordinated by two tridentate chelating (2-py)(2)C(OH)(2) ligands (py is pyrid-yl) and two benzoate anions. The Ni(II) ion is located on a twofold rotation axis, and its geometry is distorted octa-hedral. The gem-diol ligand (2-py)(2)C(OH)(2) adopts an η(1):η(1):η(1) coordination mode. There are O-H⋯O hydrogen bonds between the gem-diol ligands and benzoate anions.
    Acta Crystallographica Section E Structure Reports Online 01/2010; 66(Pt 10):m1281-2. · 0.35 Impact Factor
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    ABSTRACT: Anatomical descriptions are provided on silicified woods from a Tertiary basin Pohang, Korea by scanning electron microscopy and X-ray microanalysis. The silicified woods appeared to retain the original exterior morphology of the once grown trees, and exhibited various colors on the surface. As a component of the axial system in the secondary xylem, pores were oval to globose and measured approximately 200-300 microm in diameter in transverse planes. Seemingly bordered pits were also frequently observed in the tracheary elements. As a component of the axial system in the secondary phloem, sieve elements were found to have many sieve pores that were filled with numerous fine particles. In tangential planes, rays in the vascular cambium were approximately 500 microm long, and usually several cells wide (multiseriate). Meanwhile, several forms of microbial growth such as bacterial chains and hyphal growth of either fungi or actinomycetes were evident in the vessel lumens of unpolished silicified wood pieces. Some fracture surfaces were mainly characterized by the occurrence of polyhedral crystals, probably quartz, in the fissures. By X-ray microanalysis, iron was detected from the brown-colored regions, whereas calcium was also detected together with iron in the black-colored regions. Based on the rare occurrence of tracheids as the axial system in the secondary xylem, the silicified woods in this study can be intrinsically categorized into angiosperm groups in the region.
    Micron 06/2009; 40(5-6):519-25. · 1.88 Impact Factor
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    ABSTRACT: American sycamore seedlings were grown in chambers with two different ozone concentrations (O3-free air and air with additional O3) for 45 days. Both the control and the O3 chambers included non-fertilized and fertilized plants. After 18 days of O3 fumigation, seedlings were placed in a clean chamber for 27 days. Seedlings under ozone fumigation showed a significant decrease in pigment contents and photosynthetic activity, and a significant increase in lipid peroxidation. Fertilization enhanced physiological damage such as the inhibition of photosynthetic activity and the increase of lipid peroxidation under ozone fumigation. During the recovery phase, the physiological damage level of seedlings increased with ozone fumigation. In addition, physiological damage was observed in the fertilized seedlings. Superoxide dismutase (SOD) and glutathione reductase (GR) activities of O3-treated seedlings increased up to 33.8% and 16.3% in the fertilized plants. The increase of SOD activity was higher in the fertilized plants than in the non-fertilized plants. Negative effects of ozone treatment were observed in the biomass of the leaves and the total dry weight of the fertilized sycamore seedlings. The O3-treated seedlings decreased in stem, root and total dry weight, and the loss of biomass was statistically significant in the fertilized plants. In conclusion, physiological disturbance under normal nutrient conditions has an effect on growth response. In contrast, in conditions of energy shortage, although stress represents a physio- logical inhibition, it does not seem to affect the growth response.
    01/2009;
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    ABSTRACT: The central part of the title centrosymmetric dinuclear complex, [Zn(2)(C(7)H(5)O(2))(4)(C(9)H(12)N(2))(2)], has a paddle-wheel conformation with four benzoate ligands bridging two symmetry-related Zn(II) ions. The distorted square-pyramidal coordination environment around the Zn(II) ion is completed by an N atom from a 4-(pyrrolidin-1-yl)pyridine ligand. The Zn⋯Zn separation of 2.9826 (12) Å does not represent a formal direct metal-metal bond. The Zn(II) ion is displaced by 0.381 (1) Å from the mean plane of the four basal O atoms. Two of the C atoms of the pyrrolidine ring are disordered over two sites with refined occupancies of 0.53 (2) and 0.47 (2).
    Acta Crystallographica Section E Structure Reports Online 01/2009; 66(Pt 1):m61-2. · 0.35 Impact Factor
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    ABSTRACT: The purpose of this study is to identify the effects of exercise training and oak tree wood vinegar ingestion on the blood lipids and antioxidant activities of rats. The subjects were 28 Sprague Dawley male rats, and they were assigned into four groups (n=7, respectively): the control group (CON), the exercise group (EXE), the vinegar ingestion group (VIN), and the vinegar ingestion and exercise training group (VINEXE). The diet was based on high fat and oral administration of oak tree wood vinegar. The rats that were not given oak tree wood vinegar were given the same amount of distilled water orally in order to maintain the same level of stress. They were exercise trained on motor-driven treadmills during a four-week session. Weight changes in the VINEXE were significantly inhibited in the later period of exercise, when compared to the CON (p
    Journal of Life Science. 01/2009; 19(9).
  • Acta Crystallographica Section E-structure Reports Online - ACTA CRYSTALLOGR E-STRUCT REP. 01/2009; 65(6).

Publication Stats

60 Citations
20.43 Total Impact Points

Institutions

  • 2012
    • Seoul National University of Technology
      Sŏul, Seoul, South Korea
  • 2009–2012
    • Kyungpook National University
      • • Plant Resources Environment
      • • School of Ecology & Environmental System
      Daikyū, Daegu, South Korea
  • 2010
    • Seoul National University
      • National Instrumentation Center for Environmental Management - NICEM
      Seoul, Seoul, South Korea
  • 2006
    • Sangju National University
      Syōsyū, North Gyeongsang, South Korea
    • Korea Forest Research Institute
      Sŏul, Seoul, South Korea