• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVII)
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• pp.649-650
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• 2005

• BMB Reports
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• 제32권2호
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• pp.203-209
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• 1999

Three-week grown Arabidopsis thaliana leaves were wounded by cutting whole leaves with a razor blade into pieces (about$3\;mm\;{\times}\;3\;mm$) submerged in various solutions, and incubated in a growth chamber for 24 h. We measured and compared activities of several enzymes such as phenylalanine ammonia-lyase (PAL), tyrosine ammonia-lyase (TAL), thioredoxin, thioredoxin reductase, thioltransferase, glutathione reductase, and $NADP^+$ -malate dehydrogenase. PAL activity was decreased in $HgCl_2$-, $CdCl_2$-, and glyphosate-treated leaf slices, and could not be detected after treatment with $CdCl_2$. TAL activity was found to be maximal in the $CdCl_2$-treated leaf slices. Activity of thioredoxin, a small protein known as a cofactor of ribonucleotide reductase and a regulator of photosynthesis, was significantly increased in the $CdCl_2$-treated leaf slices, while thioredoxin reductase activity was maximal in the $HgCl_2$-treated leaf slices. Thioltransferase and glutathione reductase activities were significantly decreased in the $HgCl_2$-treated leaf slices. $NADP^+$ -malate dehydrogenase activity remained relatively constant after the chemical treatments. Our results strongly indicate that sulfhydryl-related and phenylpropanoid-synthesizing enzyme activities are affected by chemical treatments such as hydrogen peroxide, heavy metals, and glyphosate.

• BMB Reports
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• 제51권1호
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• pp.21-26
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• 2018

Delta-like ligand 4 (DLL4) expression in endothelial cells is intimately associated with angiogenic sprouting and vascular remodeling, but the precise mechanism of transcriptional regulation of DLL4 remains incompletely understood. Here, we showed that LIM-domain binding protein 2 (LDB2) plays an important role in regulating basal DLL4 and VEGF-induced DLL4 expression. Knockdown of LDB2 using siRNA enhanced endothelial sprouting and tubular network formation in vitro. Injection of ldb2-morpholino resulted in defective development of intersegmental vessels in zebrafish. Reduction or over-expression of LDB2 in endothelial cells decreased or increased DLL4 expression. LDB2 regulated DLL4 promoter activity by binding to its promoter region and the same promoter region was occupied and regulated by the LMO2/TAL1/GATA2 complex. Interestingly, LDB2 also mediated VEGF-induced DLL4 expression in endothelial cells. The regulation of DLL4 by the LDB2 complex provides a novel mechanism of DLL4 transcriptional control that may be exploited to develop therapeutics for aberrant vascular remodeling.

• Natural Product Sciences
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• 제13권2호
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• pp.105-109
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• 2007

Alcoholic extract of Terminalia arjuna [TA] was evaluated far its hepatoprotective activity against carbon tetrachloride (CCl$_4$)-induced hepatic damage in rats. The hepatoprotective activity of TA was evaluated by measuring levels of serum marker enzymes like serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), serum alkaline phosphatase (SALP). The serum levels of total proteins(TP), total albumins (TAL) and bilirubin (BILN) were also estimated. The histological studies were also carried out to support the above parameters. Silymarin (SM) was used as standard drug. Administration of TA (250 and 500 mg/kg/po) markedly prevented CCl$_4$-induced elevation of levels of SGOT, SGPT, SALP, TP, TAL and BILN. These biochemical observations were supplemented by histopathological examination of liver sections. Alcoholic extract of TA also shown significant in-vitro free radical scavenging activity against 1, 1-diphenyl-2-picryl hydrazyl (DPPH) and nitric oxide (NO) radicals. Thus, the present study provides a scientific rationale for the traditional use of this plant in the management of liver diseases.

• Korean Chemical Engineering Research
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• 제59권2호
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• pp.232-238
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• 2021

The development of a low cost catalyst with high performance and small amount of carbon deposition on catalyst from toluene steam reforming were investigated by using coal ash as a support material. Ni-loaded coal ash catalyst showed similar catalytic activity for toluene steam reforming compared with the Ni/Al2O3. At 800 ℃, the toluene conversion was 77% for Ni/TAL, 68% for Ni/KPU and 78% for Ni/Al2O3. Ni/TAL showed similar toluene conversion to Ni/Al2O3. However, Ni/KPU produced higher hydrogen yield at relatively lower toluene conversion. Ni/KPU catalyst showed a remarkable ability of suppressing the carbon deposition. The difference in coke deposition and hydrogen yield is due to the composition of KPU ash (Ca and Fe) which increase coke resistance and water gas shift reaction. This study suggests that coal ash catalysts have great potential for the application in the steam reforming of biomass tar.

• Journal of applied mathematics & informatics
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• 제5권1호
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• pp.13-22
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• 1998

Fractals which represent many of the sets in various scien-tific fields as well as in nature is geometrically too complicate. Then we usually use Hausdorff dimension to estimate their geometrical proper-ties. But to explain the fractals from the hausdorff dimension induced by the Euclidan metric are not too sufficient. For example in digi-tal communication while encoding or decoding the fractal images we must consider not only their geometric sizes but also many other fac-tors such as colours densities and energies etc. So in this paper we define the dimension matrix of the sets by redefining the new metric.

• 대한자원환경지질학회:학술대회논문집
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• 대한자원환경지질학회 2005년도 춘계 학술발표회 논문집
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• pp.131-135
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• 2005

• 동의신경정신과학회지
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• 제12권2호
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• pp.1-15
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• 2001

According to ICD-10, The typical Depression are characterized by dejected mood, loss of interest and pleasure, feeling of helplessness. Also, other symptoms such as loss of attentiveness and concentration, guilty conscience, pessimistic attitude for the future, sleeping disorder, lack of appetite, thinking of or doing a self-injury or suicidal act may characterize Depression. These Symptoms of Depression are similar to Wool-Zeng(鬱證), Zeon-Zeng(癲證), Her-ro(虛勞), Bul-Sa-Sik(不思食), Tal-Young-Sil-Zeong(脫營失精), Bul-Myeon(不眠), Ki-Myeon(嗜眠) in Oriental Medicine. In general, Depression is classified into Wool-Zeng type and Zeon-Zeng type. The former is similar to the neurotic type of depression, the latter is similar to the psychopathic type of depression. The clear causes of Depression are not known yet. But psychodynamic and biological factors are assumed to cause Depression. Psychodynamic factors may correspond to Chil-Zeong(七情) and biological factors to Tae-Byeong(胎病) and Dam(痰) in Oriental medicine. In Occidental medicine, Depression is treated by psychotherapy and medication. Electrically-induced spasm therapy and phototherapy also used for the treatment of Depression. In Oriental medicine, Depression is treated by more various therapy such as herb medication, acupuncture and moxibustion, oriental psychotherapy and dirigation(Gi-Gong, 氣功). Depression is not easy to cure. When the treatments of Occidental medicine and Oriental medicine are mutually cooperated, more effective medical care might be expected. Therefore, futher study to treat depression by mutually cooperated therapy is necessary.

• 한국동물학회지
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• 제39권3호
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• pp.239-247
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• 1996

현탁 배양액에서 생쥐 배아주 세포를 배아체(embryoid body. EB)로 분화시키는 간단한 시험내 모델 체계가 초기 적혈구 분화 분석에 유용한 지의 여부를 조사하였다. 분화중인 배아체로부터 각 혈구계열 세포 유형이 만들어지는 지(분화능)의 여부는 혈도형성, benzidine 염색법 및 2단계 콜로니 분석법을 조사하였고, 발생과 분화시기에 바ㅈ추어 적혈구 표시 유전자들이 발현되는 지(발현능)의 여부는 각 분화시기별 배아체로 부터 추출한 RNA를 RT-PCR 방법으로 조사하였다. 분석 결과, 다른 기존의 복잡한 분화 방법에 의한 것과 마찬가지로 모든 혈구계열 세포 유형이 반복성 있게 유도되었다. 더군다나, 분화중인 배아주 세포에서의 글로빈 유전자 발현 전환은 생쥐 배아에서와 유사하게 진행되었으며, 글로빈 유전자의 발현은 적혈구-특이 전사인자인 GATA-1과 Tal-1보다 적어도 12시간 늦게 활성화되었다. 이와같이 간단한 분화 체계에서도 적혈구 분화과정이 효율적으로 반복성 있게 나타나는 것으로 보아, 간단한 현탁배양에서의 분화는 초기 적혈구 분화과정이 분자적 기작을 분석하는데 유용하게 이용될 수 있으리라 본다.

• 대한한의학회지
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• 제27권3호
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• pp.212-221
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• 2006

Objectives: This study was designed to investigate acupuncture treatment of alopecia patients by researching literature and to standardize acupuncture treatment. Methods: We extracted the parts about acupuncture treatment of alopecia which are called 'Tal Bal(說髮), 'Ban Dok'(斑禿), 'Tal Mo'(脫毛), 'Bal Rak'(髮洛), 'Wonhyung Talmo'(圓形脫老) from 2 ancient and 49 modern oriental medicine literal sources. We surveyed the frequency and characteristics of the acupoints used for treatment of alopecia, and the acupoint was classified according to its meridian or demonstration. The results of this study were recorded as follows: 1. The most frequently used acupoints were GB20(風紙), GV20(百會), BL13(膈兪), SP6(三陰交), ST36(足三里), BL23(腎兪), SP10(血海), LI11(曲池), in that order. 2. The most frequently used meridians were the urinary bladder meridian (足太湯膀胱經), the Governor Vessel(督豚), the spleen meridian(足少陰脾經), and the gall bladder meridian(足少陰膽經), in that order 3. The most frequently used regions were the head, under the knee, and the back, in that order. 4. The most frequently used Jang organs and Bu organs were the spleen(脾), the stomach(胃), the liver(肝), the gall bladder(擔), the lungs(肺), and the large intestines(大腸), in that order. 5. Common methods of differentiation of alopecia are Hyulyulsaengpung(血熱生風), Gichehyutea(氣滯血瘀), Gihyulyanghea(氣血兩瘀), and Gansinbugok(肝腎不足). Conclusions : For treatment of alopecia, all the patient's symptoms, including alopecia, must taken into consideration and demonstrated.