Invited by Myagri Co, Kuala Lumpur, Malaysia

Invited speaker by Dalian Agricultural Research Institute and Dalian Polytechnic University, China

Invited by Agricultural Co, Harbin. China

Asian Congress on Biotechnology, Shanghai, China. Global Committee Member, Chairperson, Invited Speaker.

Invited Mongolian Agricultural Co, Ulan Bator, Mongolia

The 2nd China, Japan and Korea International Conference for TCM & 7th Sino-Russia Biomedical Forum, China, Harbin Invited Special Lecture

China International Orchid Symposium 2010, China,Taian Invited Speaker

Invited as delegate of Korea in 10th Asia-Pacific Orchid Conference in Chungquing, China

Invited speaker and scientific committee member in 1st international sym. of orchid, Taichung, Taiwan

Invited speaker in Asia-Korean Conference on advanced science and technology. Yanji, China

Invited as International Advisory Committee Member and speaker of 6th Intl sym on in vitro
culture and horticultural Brisbane, Australia breeding.

Invited as keynote speaker of 6th International Conf on the biology of plant cells in vitro
and biotechnology. Zvenigord, Russia

Invited as Technical Advisory Committee Member on 18th orchid exhibition, Onju, China

Participated as speaker, 3rd International sym on acclimatization and establishment of micropropagated plants.
Faro, Portugal

Invited Judge and speaker in Okinawa International Orchid Show,
Japan 64. 2007.06.17-21 Invited lecture
in Asia-Pacific conference of plant biotechnology in Malaysia

Special lecture by invitation of Najing Forestry University, China

Invited Judge, Singapore Orchid Show, Singapore

Workshop Organizer and Invited speaker, National training course on-Cell culture
using bioreactor technology.
Malaysian Ins. For Nuclear Technology Res. Selangor, Malaysia

Invited speaker, Phytomolecule production from useful medicinal plants
using commercial scale bioreactor.
Tehran, IranBiotechnology Exchange Forum by Pardis Technology Park

Convenor of Biotechnology Session.
Plant tissue culture: Past, present and prospect for the future.
27th International Horticultural Congress and Exhibition. Seoul, Korea

Special lecture in BioPlanta Co. Leipzig, Germany

Special lecture in College of Natural Science, Moscow University, Moscow, Russia

Invited speaker. Secondary metabolite production by bioreactor technology.
International Symposium on Frontiers n Genetics and Biotechnology.
Osmania University, India

Invited speaker. Application of bioreactor technology for the horticultural plants.
93th Indian Science Congress. Hydrabad, India.

Invited speaker. Micropropagation of horticultural plants through plant trissue culture.
5th Agricultural Science Symposium between South and North Korea, Gyesung, North Korea

Official visit to Hawaiian Orchid Association for 9th APOC. Hawaii, USA

Official invitation as guest professor by Zhezang Forestry Univ.

Invited speaker and chairperson. Bioreactor system for large scale plant cultures and
secondary metabolite production. In Vitro Culture and Horticultural Breeding: Biotechnology
as Theory and Practice in Horticulture. Durban, Hungary

Invited speaker, chairperson. Orchid industry in Korea and related research.
8th Asia-Pacific Orchid Conference. Tainan, Taiwan

Scientific tour for understanding of horticultural industry in China

Invited speaker, chairperson. Adventitious root cultures of Panax ginseong in bioreactors
for commercial scale production of bioactive compound.
International Symposium on Bioreactor and Biomolecular Engineering. Shanghai, China

Invited. Advisor for advanced horticultural technology in Java. Java, Indonesia

Invited speaker. Secondary metabolite production
using bioreactor technology 45th Anniversary of Foundation of Zhezang Forestry Univesity, Zhezang, China

Invited speaker. Commercial scale production of bioactive compounds through
large-scale bioreactor culture of medicinal plants.
1st International Congress on Bioreactor Technology in Cell, Tissue Culture and
Biomedical Application. Tempere, Filand

Korean Representative. 2003 International Taiwan Orchid Exhibition. Tainan, Taiwan

Increase of saponin content via elicitor treatment in bioreactor culture of Panax ginseong adventitious root.
The 3th World Congress on Medicinal and Aromatic Plants for Human Welfare. Chiang Mai, Thailand

Invited speaker. Production of virus-free potato plantlets using bioreactor system.
Pyungyang, North Korea

Application of bioreactor culture for large scale production of chrysanthemum.
26th International Horticultural
Congress and Exhibition, Toronto, Canada

Commercial production of Panax ginseong using bioreactor system
10th International Congress for Plant Tissue Culture and Biotechnology. Florida, USA

Keynote speaker, International Organizing Committee, Chairperson Application
of bioreactor system for large scale production of horticultural and medicinal plants.
International Symposium for Mass production of Plaant in Liquid System.
Agricultural Univ. of Norway, Norway

Representative for hosting 9th APOC. 17th World Orchid Conference, Shah Alam, Malaysia

Invited speaker. Jasmonic acid improves ginsenoside accumulation in adventitious root culture
of Panax ginseong. Biochemical Engineering and Biotechnology in the 21th Century.
Shanghai, China

International Advisory Committee. International Sago Symposium 2001. Borneo

Invited speaker. Present situation of horticultural industry in Korea and
development of exchange program with China.
4th Conference Organized by Institute of Agricultural Development in East and North Asia.
Yenben, China

Ginsenoside production by hairy root cultures of Panax ginseong in bioreactor.
Possibilities and Limitations
of Medicinal and Aromatic Plants Production Towards the 21st Century. Budapest, Hungary

Invited speaker, chairperson. Cultivation of Phalaenopsis by hydroponic techniques.
7th Asia-Pacific Orchid Conference. Nagoya, Japan

Calgary University, Canada

Effect of NO3:NH4ratioandionicstrengthonadventitiousrootgrowthandginsenosideproduction
inbioreactorculture of Panaxginseong.
The4thInternationalSymposiumonInVitroCultureandHorticulturalBreeding.Tampere,Filand

Invited speaker, Organizing Committee. Micropropagation of ornamental plants
using bioreactor system.
International Symposium on Transplant Production in Closed System
for Solving the Global Issues on Environmental Conservation. Chiba University, Japan

Blue and red emitting diodes affect growth of Rehmania glutinosa plantlets
at different sucrose concentration and number of air exchange.
Methods and Marker for Quality Assurance in Micropropagation. Cork, Ireland.

Growing media affect growth and flower quality of Gerbera International Symposium
on Growing Media
and Hydroponics Culture Methods. Termi, Greece

15th International Orchid Conference, Vancouver, Canada

Nagoya and Kyoto University and Research institute, Japan

Invited by Dalat University in Vietnam

A noble fedculture system using bioreactor for the bulblets production of oriental lilies.
25th International Horticultural Congress. Brussel, Belgium

Invited speaker. Cultivation of Korean native orchid. Nagoya International Orchid Conference. Nagoya, Japan.

Effect of antiviral chemicals aand cultural environment on survival rate and
shoot multiplication through shoot tip culture Rehmania glutinosa.
2nd World Congress on Medicinal and Aromatic Plants for Human Welfare.
Mendosa, Argentina

Development of pilot scale process for mass production of lily bulblet in vitro.
International Symposium on Biotechnology of Tropical and Subtropical Species.
Brisbane, Australia

Interspecific and intergeneric hybrids of brassica and raphanus by ovule culture and their physiological and
morphological characteristics International Conference on Harmonizing Agricultural Productivity
and Conservation of Biodiversity. Seoul, Korea

Invited speaker and chairperson, Effect of artificial infection of CyMV and
ORSV on the growth of orchid. ’97 Nagoya International Orchid Conference, Nagoya, Japan

HIH Research Institute and Chiba University, Japan

Isolation of mycorrhiza and its effect on the growth of orchid.
15th International Orchid Conference, Rio Dejaneiro, Brazil

Invited speaker, chairperson, Mass production and selection of somaclonal variants in Hosta.
Iernational Symposium for the Transplant Production in Closed Ecosystem, Naarita, Japan

Invited speaker, Micropropagation of medicinal plants. 2nd Asia-Pacific Plant Tissue Conference,
Peking, Gangzou, China

Invited, Misuii Co. Research Institute, Japan

Invited speaker, International organizing committee, International Conference of Plant Production in Closed Environment. Chiba, Japan

Invited speaker, chairperson, Korea orchid industry. 5th Asia-Pacific Orchid Conference,
Fukuoka, Japan

Micropropagation and selection of somaclonal variation in Lisianthus.
24th International Congress of Horticultural Science. Kyoto, Japan

Sucrose metabolism during rhizome culture in oriental cymbidium.
8th International Congress of Plant Tissue Culture, Firenze, Italy

International Organizing Committee, 5th International Sago Symposium, Thailand

Effect of sucrose gradient and change of free sucrose content on organogenesis of rhizome in oriental cybidium. Nagoya International Orchid Conference, Nagoya, Japan

Invited speaker, Effect of medium water potential on the growth response
of horticultural plants in vitro Workshop for rapid propagation of tropical economic plants.
Ho Chi Minh, Vietnam

In vitro breeding and micropropagation of oriental orchid 13th World Orchid Conference,
Aukland, New Zealand

Organogenesis from rhizome culture in oriental Cymbidium SABRAO,
workshop for gene manipulation for plant breeding Kuala Lumpur, Malaysia

Selection of salt tolerant cell line in Brassica campestris
6th International Congress of Plant Tissue Culture. Minnesota, USA

Scale and inflorescence segment culture in Hyacinth 5th International Congress
of Plant Tissue Culture. Tokyo, Japan