• 한국환경과학회지
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• 제33권1호
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• pp.103-111
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• 2024

This study was conducted to identify the differences in physiological and psychological effects between artificial and natural plants. Artificial and natural plant pots consisting of the same species and forms were prepared, and 40 subjects were asked to look at these plants for 3 min, and psychological responses were measured. Semantic differential, profile of mood states, and positive and negative affect schedule were used as psychological response measurement scales. As a result, regardless of the difference in plant material, as plants were viewed, negative emotions decreased in psychological terms. This result suggests that artificial plants can replace natural plants and that the use of artificial plants can be improved if planting natural plants is difficult because there is no difference in the psychological effects provided by artificial and natural plants.

• 한국환경복원기술학회지
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• 제4권4호
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• pp.25-35
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• 2001

This study aims to find out the growth characteristics of riparian plants on the artificial floating islands (AFI). Three types of experiments were performed. The vegetation growth were compared by the plant-supporting materials; natural cotton mat, coir mat on the AFI or in the water, and natural soil at the waterfront. Major findings are; 1. The survival rate of riparian plants was 100% on both coir-mat and cotton-matislands, which implies that we may substitute cheaper cotton for expensive coir-mat. 2. Both natural cotton mat and coir mat were good for the growth of plants. Especially, the natural cotton mat was good for Sparganium stoloniferum and Miscanthus sacchariflorus, and the coir mat was good for Typha latifolia. 3. The growth rate of stem and root showed difference between the stem-removed plants and stem-remaining plants. As a whole, the growth rate of stem-removed plants was bigger than the one of stem-remaining plants. 4. The growth rate of plants showed difference between those grown on the AFI and those grown in the water. The growth rate of plant on the AFI was bigger than the one in the water. 5. The growth rate of plants on the AFI was bigger than the one on the natural soil at the waterfront.

• 생약학회지
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• 제8권2호
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• pp.81-88
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• 1977

Plants and animals with fertility regulation activities which have been used in Korea are surveyed. This survey covers most of the natural resources with contraceptive, abortifacient and emmenagogue activities. It includes 110 plants and 17 animals. Twenty plants and animals with reputed antifertility potential are selected and tabulated.

• Natural Product Sciences
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• 제17권2호
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• pp.65-79
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• 2011

Reactive oxygen species potentially cause damage to cellular components including lipids, protein and DNA; this oxidative damage plays a key role in the pathogenesis of neurodegenerative disease, cardiovascular disease, metabolic disease and cancer. On the basis of the oxidative stress hypothesis, a number of studies have been performed to search for an efficient and safe antioxidant. Although in vitro studies have provided promising results, only a limited number of natural and synthetic antioxidants have been developed for clinical application due to their low efficacy and side-effects. Thus, the discovery of new antioxidants with marked efficacy and safety has attracted worldwide attention in recent decades. Since plants are recognized as important sources of natural antioxidants, our research has focused on the discovery of new naturally occurring antioxidants from medicinal plants. The purpose of this review is to open a new prospect in the field of search for natural antioxidants from medicinal plants by summarizing our recent findings. Using in vitro bioassay systems such as 2,2-diphenyl-1-picrylhydrazyl, superoxide radical scavenging tests and lipid peroxidation models, we have tested over than 350 species of medicinal plants for their antioxidant activity and selected several of them for further investigation. During the research on the discovery of effective natural antioxidants from the medicinal plants selected, we have isolated several new and known antioxidant compounds that include stilbene glycosides, phenolic glycosides, flavonoids, oligostilbenes, and coumarins. Our results suggest that the presence of antioxidant compounds in the medicinal plants might be associated with the traditional use to treat inflammation, cardiovascular disease and various chronic diseases.

• Natural Product Sciences
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• 제2권2호
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• pp.86-89
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• 1996

Methanolic extracts of 25 species of Malaysian medicinal plants were screened for platelet-activating factor (PAF) receptor binding activity using rabbit platelet. Extracts of Cinnamomum sintoc, Ixonanthes iconsandra, Paederia foetida, Piper aduncum, Premna integrifolia, Ardisia crispa, and Ardisia elliptica showed significant inhibitory effect on the platelet-activating factor (PAF) receptor binding.

• Archives of Pharmacal Research
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• 제1권1호
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• pp.13-20
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• 1978

Alcohol extracts of plants widely used in the traditional medicine have been tested to establish if they affect the metabolism of drug in mice. Forteen of the plants tested exhibited prolonging and/or inhibitory effect on hexobarbital sleeping time. Some of them also showed increasing effect on strychnine mortality, whereas piperis retrofracti Fructus reduced the toxicity of strychnine.

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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• pp.211.1-211.1
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• 2003

On the purpose of develcpement of antioxidative compound from natural sources, medicinal plants known to have antioxidant actuvity have been examined concening DPPH radical scavenging activity and SOD-liked activities. Among 8 plants exhibiting the activity, Houttuynia cordata THUNB was selected as resources to search for active compounds due to rareness of study. The antioxidative compounds from Houttuynia cordata THUNB,quercitrin was assayed using a DPPH free radical. The DPPH radical scavenging activity of quercitrin was similar to that of BHA and Ascorbic acid

• 한국환경복원기술학회지
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• 제4권1호
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• pp.16-23
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• 2001

This study was conducted to analyse the relation between physical characteristics of soil surface and wild plants occurrence. Lots of natural occurrence on loamy soil and a little of natural occurrence on perlite. Those were used to observe the wild plants occurrence through the duration. Natural occurrence of wild plants were observed on uniform sand, perlite, loamy soil and 2cms loamy soil layer above the perlite. Uniform sand was compared with different height of drain ditch. The results of analysis were as followed. 1. Wild plants germinated on the uniform perlite layer, they did not grow larger. Because water in large pores of perlite surface drained rapidly and evaporated easily, therefore surface remained low moisture contents. 2. A lot of weed grew on 2cms loamy layer on perlite which stratified above the perlite layer. Because perlite had plenty of soil moisture and soil moisture moved easily from perlite to loamy soil layer. 3. Uniform loamy soil had similar occurrence on the uniform perlite. It was nearly same at surface moisture distribution but lower than layered loamy soil on perlite, and the vertical distributions at soil moisture was totally lower than 2cms loamy soil layer on perlite. 4. Wild plants were grew on uniform sand on different height of drain ditch. In this case, much more wild plants were grew on which had more higher drainage ditch. The number of wild plants occurred when it was affected by soil surface moisture, drain ditch and natural occurrence of wild plants. This could be controlled by layered soil at surface moisture. Therefore weed occurrence can control in planting ground, where soil layer would not be disturbed.

• 생약학회지
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• 제8권3호
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• pp.125-129
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• 1977

Literature survey was undertaken to investigate what medicinal plants have been used as hepatotonic or for treatment of various liver diseases in far eastern asian countries. Total 59 plants were found to be described in the literatures. And 9 plants among them were studied on their hepatotonic activities against animal model of hepatitis. Several plants appeared to exhibit profound activities on the hepatitis model employed.

• 생약학회지
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• 제10권2호
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• pp.79-82
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• 1979

Total fourty-four medicinal plants described in old literatures to be hepatotonic were evaluated their potential hepatotonic activities against an animal model of hepatitis. Tweenty-seven plants extracts appeared to be significant hepatotonic activities, whereas twelve plants extracts exhibited rather some toxicity. And five plants extracts showed no significant hapatotonic activities and toxicity.