40 Result(s)

Article

High frequency somatic embryogenesis and plant regeneration in petiole and leaf explant cultures and petiole-derived embryogenic cell suspension cultures of Hylomecon vernalis

Culture conditions are described for high frequency somatic embryogenesis and plant regeneration in petiole and leaf explant cultures and petiole-derived embryogenic cell suspension cultures of Hylomecon vernalis

S.W. Kim, D.S. In, T.J. Kim, J.R. Liu in Plant Cell, Tissue and Organ Culture (2003)

Article

Structure character in small-carbon-cluster deposition on diamond surface

Experimentally, hydrogen-free diamond-like carbon (DLC) films were assembled by means of pulsed laser deposition (PLD), where energetic small-carbon-clusters were deposited on the substrate. In this paper, the...

Z.J. Li, Z.Y. Pan, Q. Wei, A.J. Du, Z. Huang… in The European Physical Journal D - Atomic, … (2003)

Chapter

In Vitro Culture and the Production of Secondary Metabolites in Coriandrum sativum L. (Coriander)

Coriander (Coriandrum sativum L.) is an annual herb that belongs to the Umbelliferae. Major producers are Morocco, Canada, India, Pakistan, Rumania, and the former Soviet Union. The coriander plant yields both th...

J. R. Liu, S. W. Kim, S. C. Oh in Medicinal and Aromatic Plants XII (2002)

Chapter

Transgenic Watermelon (Citrullus lanatus)

Watermelon, one of the most important vegetable crops, is eaten chiefly as a fresh fruit. It originated from tropical and subtropical Africa, and now is widely distributed throughout the tropics, Mediterranean...

J. R. Liu, P. S. Choi, Y. S. Kim in Transgenic Crops II (2001)

Article

Phase transitions in the incoherent lattice fluctuations in YBa ₂Cu₃O_7-δ

The growing body of experimental evidence^{1,2,3,4,5,6,7} for the existence of complex textures of charges and spins in the high-temperature superconductors has drawn attention to the so-called ‘stripe-phase’ model⁸

R. P. Sharma, S. B. Ogale, Z. H. Zhang, J. R. Liu, W. K. Chu, Boyed Veal… in Nature (2000)

Article

Phytoremediation of cadmium contamination: Overexpression of metallotionein in transgenic tobacco plants

J.R. Liu, M.Ch. Suh, D. Choi in Bundesgesundheitsblatt - Gesundheitsforsch… (2000)

Article

Study of hydrogen annealing of ultrahigh molecular weight polyethylene irradiated with high-energy protons

Ultrahigh molecular weight polyethylene, an important biomaterial for orthopedic implants, was irradiated with 2.6- and 3-MeV H⁺ ions at low doses from 5.7 × 10¹¹ to 2.3 × 10¹⁴ ions/cm². Fourier transform infrare...

J. F. Wilson, J. R. Liu, F. Romero-Borja, Wei-Kan Chu in Journal of Materials Research (1999)

Chapter

Genetic Transformation of Panax ginseng (Ginseng)

Ginseng (Panax ginseng C.A. Meyer) belongs to the Araliaceae family. In China and Korea, ginseng has been used medicinally for over 1000 years. Old literature recounts that ginseng cultivation in Korea began at l...

J. R. Liu, H. S. Lee, S. W. Kim in Transgenic Medicinal Plants (1999)

Article

Surface Oxygen Exchange Kinetics and Oxygen Diffusion Rates in Ysz Single Crystals

Isotope exchange with C¹⁸O₂ followed by depth profiling analysis was used to study surface exchange and bulk diffusion of oxygen in single crystal ((100) surface orientation) yttria-stabilized zirconia (YSZ) in t...

N. I. Joos, P. A. W. van der Heide, J. R. Liu… in MRS Online Proceedings Library (1998)

Article

WAPK, a Ser/Thr protein kinase gene of Nicotiana tabacum, is uniquely regulated by wounding, abscisic acid and methyl jasmonate

A cDNA encoding a protein kinase, which may be involved in the wound signal transduction pathway, was isolated from Nicotiana tabacum. The cDNA, named WAPK, is 1227 bp in length and contains an ORF of 1017 bp. T...

S. H. Lee, M. H. Lee, W. I. Chung, J. R. Liu in Molecular and General Genetics MGG (1998)

Article

Molecular cloning and characterization of cDNAs for anionic and neutral peroxidases from suspensioncultured-cells of sweet potato and their differential expression in response to stress

Two peroxidase (POD) cDNAs, swpa1 and swpn1, were isolated and characterized from suspension-cultured cells of sweet potato in order to understand the physiological function of POD isozymes. Sequence analysis...

G.-H. Huh, S.-J. Lee, Y.-S. Bae, J. R. Liu… in Molecular and General Genetics MGG (1997)

Article

Molecular cloning and characterization of two novel isoforms of the small subunit of ADPglucose pyrophosphorylase from sweet potato

Two cDNA clones encoding two different ADPglucose pyrophosphorylase (AGPase) polypeptides designated IbAGP–sTL1 (sTL1) and IbAGP-sTL2 (sTL2) were isolated from sweet potato tuberous root and leaf libraries. T...

J. M. Bae, J. R. Liu in Molecular and General Genetics MGG (1997)

Article

Analysis of nitride films on silicon substrates by ion beam methods

The simultaneous determination of light element contamination levels and accurate nitrogen-to-metal ratios in nitride thin films deposited on silicon substrates is demonstrated by using α-particle beam energie...

Z. S. Zheng, J. R. Liu, X. T. Cui, W. K. Chu… in Journal of Materials Research (1995)

Article

Proton Modification of Ultra High Molecular Weight Polyethylene to Promote Crosslinking for Enhanced Chemical and Physical Properties

Crosslinking onset was investigated for ultra high molecular weight polyethylene(UHMW-PE) implanted with 2.6 MeV H⁺ ions at low doses from 6×10¹¹-3×10¹³ ions/cm². Crosslinking in the near surface region(20–40μm) ...

J. F. Wilson, J. R. Liu, F. Romero-Borja, W. K. Chu in MRS Online Proceedings Library (1995)

Article

Deposition And Characterization of CN_x Films

CN_x films with x around 1.0 have been made by inverted cylindrical DC magnetron sputtering. RBS, XPS, IR spectroscopy, ERD and SEM were used to characterize the composition and bonding properties of the films, wh...

X. T. Cui, Z. H. Zhang, Q. Y. Chen, F. Romero-Borja… in MRS Online Proceedings Library (1994)

Article

Improvement of the catharanthine productivity in hairy root cultures ofCatharanthus roseus by using monosaccharides as a carbon source

Sucrose, glucose, and fructose as carbon sources in culture medium were assessed in hairy root cultures ofCatharanthus roseus. The cultures preferentially consumed sucrose, resulting in about 40% (dry wt) higher ...

K. H. Jung, S. S. Kwak, S. W. Kim, H. Lee, C. Y. Choi, J. R. Liu in Biotechnology Letters (1992)

Article

Selection of protoclones for high yields of indole alkaloids from suspension cultures ofCatharanthus roseus and the qualitative analysis of the compounds by LC-MS

To produce economically important indole alkaloids by cell culture, we have selected protoclones ofCatharanthus roseus for high yields of catharanthine and ajmalicine. Protoplasts were enzymatically isolated from...

K. H. Jung, S. S. Kwak, S. W. Kim, C. Y. Choi, G. S. Heo… in Biotechnology Techniques (1992)

Article

Thermal Neutron Irradiation and Large Pinning Enhancement in Superconducting Materials

Up to 25 times enhancement of magnetic critical current density has been observed at 70 K and 2500 O for 3% ⁶Li-doped sintered YBCO sample irradiated with thermal neutrons at a dose of 1 x 10¹⁸ n/cm². High energy...

Y. J. Zhao, J. R. Liu, R. L. Meng, P. H. Hor, W. K. Chu in MRS Online Proceedings Library (1991)

Article

Weak Pinning Centers in Proton Irradiated YBCO Single Crystals

Observed magnetic J_c enhancement in a 3.4 MeV proton-irradiated Y₁Ba₂Cu₃O_7-ò (YBCO) single crystal are shown to be intimately linked with a kind of weak pinning centers. Applied magnetic field transforms weak cen...

Y. J. Zhao, J. R. Liu, Y. K. Tao, P. H. Hor, W. K. Chu in MRS Online Proceedings Library (1991)

Article

Plant regeneration from apple seedling explants and callus cultures

Leaf, cotyledon, and hypocotyl explants were obtained from 3-week-old seedlings of open-pollinated ‘Golden Delicious’ (Malus domestica bork H.) grown in vitro. They were placed on modified Murashige and Skoog (MS...

J. R. Liu, K. C. Sink, F. G. Dennis in Plant Cell, Tissue and Organ Culture (1983)