• 공업화학
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• 제21권4호
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• pp.424-429
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• 2010

본 연구는 유기발광디바이스용(OLED) 녹색발광재료인 6-알킬-3-크로몬알데히드(2,2-디알킬)하이드라존 유도체의 합성에 관한 것으로서, 유도체들은 탈수축합반응으로 합성되었다. 이들은 전자흡인성의 6-알킬-3-크로몬알데히드류와 전자공여성의 2,2-디알킬하이드라존류의 공액구조를 가지고 있다. 합성된 물질들은 각각 FT-IR, $^1H$-NMR 스펙트럼으로부터 그의 구조적 특성을 확인하였고, 융점, 수득률에 의하여 열적 안정성, 반응성을 확인하였으며, 여기스펙트럼과 발광스펙트럼으로부터 자외가시광과 발광특성을 확인하였다.

• Advances in Traditional Medicine
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• 제3권4호
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• pp.205-211
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• 2003

Stem bark of Cinchona sp. (Rubiaceae) is one of the well known drugs for its therapeutic values in traditional as well as modern medicine. Even though a lot of work has been carried out on quinoline alkaloids of Cinchona, its phenolic constituents received very little attention. In the present study, we evaluated antioxidant properties of C. officinalis stem bark methanolic extract and water extract containing phenolic compounds (total phenolics 21.37, 5.18% w/w respectively in the two extracts) in different in vitro and ex vivo models viz., antiradical activity by DPPH reduction, superoxide radical scavenging activity in riboflavin/light/NBT system, nitric oxide radical scavenging activity in sodium nitroprusside/Greiss reagent system and inhibition of lipid peroxidation induced by iron-ADP-ascorbate in liver homogenate and haemolysis of erythrocytes induced by phenylhydrazine in erythrocyte membrane stabilization study. Both the extracts exhibited very good antioxidant activity in all the models tested. The phenolic compounds including tannins present in the stem bark seem to offer protection from the oxidative damage.

• 공업화학
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• 제20권6호
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• pp.670-674
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• 2009

본 연구는 유기발광디바이스용(OLED) 녹색형광물질인 3-크로몬알데히드(2,2-이치환)하이드라존 유도체의 합성에 관한 것으로서, 유도체들은 탈수축합반응으로 합성되었다. 이들은 전자흡인성의 3-크로몬알데히드류와 전자공여성의 2,2-이치환하이드라존류의 공액구조를 가지고 있다. 합성한 물질은 각각 FT-IR, $^1H-NMR$ 스펙트럼으로부터 그의 구조적 특성을 확인하였고, 융점, 수득률에 의하여 열적 안정성, 반응성을 확인하였으며, 여기스펙트럼과 발광스펙트럼으로부터 자외가시광과 발광특성을 확인하였다.

• Archives of Pharmacal Research
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• 제13권4호
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• pp.351-354
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• 1990

2, 3-diphenyl-4-cyano-pyrrole-5-thione (4) was either by the reaction of benzoin (1) and cyanothioacetamide (3) followed by cyclization using AcOH/sodium acetate or by refluxing a mixture of benzoin (1) and cyanothioacethamide in pyridine to afford directly 4. Several new pyrrole and pyrazole derivatives were synthesised using 4 as synthon. The structure of the newly synthesised derivatives were based on celemental and spectral data studies. Methylation of the SH group in 4 afforded 5. Reaction of 4 with ethyl bromo acetate afforded (6). Treatment of (5) and (6) with hydrazine hydrate afforded the same pyrazole derivative (10) through the intermediate (9). Treatment of 6 with aniline and phenylhydrazine afforded the pyrrole derivatives 8a, b respectively. Treatment of 6 while dill HCI gave 2, 3-diphenyl-4-cyano-pyrrole-5-one (7). Treatment of 6 with $NH_3$/EtOH afforded the amidic derivatives (11) with treatment of 6 $NH_3$/ heat then acidification it gave the carboxylic derivatives (12).

• 한국산업보건학회지
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• 제10권1호
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• pp.126-146
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• 2000

To develop and evaluate formaldehyde measurement method using 2,4-dinitro-phenylhydrazine (2,4-DNPH) coated sampler and gas chromatography, laboratory test and field test were conducted. Results of this study are as follows. Limit of detection(LOD) of measurement methods, HPLC-UVD, GC-NPD and GC-FID, is $0.008{\mu}g/m{\ell}$ $0.060{\mu}g/m{\ell}$, $0.472{\mu}g/m{\ell}$ respectively. Coefficiency of measurement methods, HPLC-UVD, GC-NPD and GC-FID, is 0.008, 0.009, 0.020 respectively. Desorption efficiency of sep-pak xposure aldehyde sampler and sorbent sample tube is 1.05(range : 0.99 - 1.12), 1.02(range : 0.99 - 1.06) respectively. Samples of sorbent sample tube and sep-pak xposure aldehyde sampler turned out to be stored at refrigerator, according to storage test results. Measurement methods of HPLC-UVD, GC-NPD, GC-FID, according to results of precision for the combined sampling and analytical procedure, became acceptable to OSHA evaluation standard. Field test using exposure chamber met the NIOSH overall uncertainty recommendation(less than 25%). Overall uncertainty of Sepak-HPLC(UVD), Tube-GC(NPD), Tube-GC(FID) is 11.0% - 17.0%. Consequently gas chromatography(GC-NPD, GC-FID) and high performance liquid chromatography(EPA TO-11) using 2,4-DNPH coated sampler for formaldehyde measurement turned out to be suitable to measure personal formaldehyde exposure at workplaces.

• 한국미생물·생명공학회지
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• 제6권4호
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• pp.155-159
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• 1978

분리된 효모에 의한 aromatic ring compound의 전환반응 실험에 앞서 phenol 자화능에 대한 환경 인자의 영향을 조사하기 위하여 phenol을 유일한 탄소원으로 사용하여 분리된 효모균을 30시간, 3$0^{\circ}C$에서 진탕배양하여 균체증식량을 측정하였다. 1) pH3.5~4.5 온도 35$^{\circ}C$에서 가장 자화능이 우수하였으며 phenol의 처음 농도 1000ppm 까지 는 쉽게 이용할 수 있었고 2000ppm에서는 5 일간 배양시켰을 때 비로소 균체증식이 나타났다. 2) pH 5.0, 배양온도 3$0^{\circ}C$에서 본 균의 maximum specific growth rate는 0.27hr-1 이었으며, phenol 을 1000ppm씩 단계적으로 첨가하면서 phenol 소비율에 대한 균체수율 정수 Y값을 구한 결과 Y=3.2였다. 3) Yeast extract를 필수영양원으로 첨가할 때 0.005~0.01% 농도에서 가장 효과적이었으며, 또 산화환원소 효소 조해제인 HgCl$_2$, phenylhydrazine 을 명명 $10^{-5}$M, $10^{-3}$M을 배지내에 첨가하면 분리된 효모균의 증식을 거의 볼 수 없었다. 4) Phenol의 자화에 명종 실소원의 효과를 비교 해 본 결과 urea가 가장 효과적이었고, 이 효모균은 phenol 외에 catechol, resorcinol, benzidine 을 자화할 수 있다

• BMB Reports
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• 제32권5호
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• pp.480-485
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• 1999

Tyrosine phenol-lyase of thermophilic Symbiobacterium sp. SC-1, which is obligately and symbiotically dependent on thermophilic Bacillus sp. SK-1, was purified and characterized. The enzyme is composed of four identical subunits and contains approximately 1 mol of pyridoxal 5'-phosphate (PLP) per mol subunit as a cofactor. The enzyme showed absorption maxima at 330 and 420 nm, and lost this absorption profile by treatment with phenylhydrazine. The apparent dissociation constsnt, $K'_D$, for PLP was determined with the apoenzyme to be about $1.2\;{\mu}M$. The isoelectric point was 4.9. The optimal temperature and pH for the $\alpha,\beta$-elimination of L-tyrosine were found to be $80^{\circ}C$ and pH 8.0, respectively. The substrate specificity of the enzyme was very broad: L-amino acids including L-tyrosine, 3,4-dihydroxyphenyl-L-alanine (L-DOPA), L-cysteine, L-serine, S-methyl-L-cysteine, $\beta$-chloro-L-alanine, and S-(o-nitrophenyl)-L-cysteine all served as substrates. D-Tyrosine and D-serine were also decomposed into pyruvic acid and ammonia at rates of 7% and 31% relative to their corresponding L-enantiomers, respectively. D-Alanine, which was inert as a substrate in a, $\beta$-elimination, was the only D-amino acid racemized by the enzyme. The $K_m$ values for L-tyrosine, L-DOPA, S-(o-nitrophenyl)-L-cysteine, $\beta$-chloro-L-alanine, and S-methyl-L-cysteine were 0.19, 9.9, 0.36, 12, and 5.5 mM, respectively.

• 한국가축번식학회지
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• 제17권3호
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• pp.173-181
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• 1993

In order to demonstrate whether ovoperoxidase hardens the zona of oocytes activated by incubating in M-S buffer supplemented with 20$\mu$M of Ca-ionophore A 23187, the effect of peroxidase inhibitors(250mM pheylhydrazine, 28mM sodilum sulfite, 350mM glycine ethyl ester and 50mM sodium azide), tyrosine analogue(12.5mM tyramine) and exogeneous peroxidase(50$\mu\textrm{g}$/ml horseradishperoxidase ; HRP) on zona hardening in ionorphore-treated oocytes were investigated. The results obtained from thses experiments were summarized as follows : 1. The zona solubility (t50) of ionophore-activated and DMSO-treated oocytes at 1, 2 and 3 hr of culture were 25.0, 31.6 and 40.6min., and 9.7, 10.8 and 15.5 min., respectively. The longest time required for zona lysis of ionophore activated oocytes at 1 hr after onset of ionophore treatment. The diferences int50 for zona was significantly greater as compared to DMSO-treated controls(P<0.01). 2. The inhibition rates of hardening in the oocytes treated with the phenylhydrazine, sodium sulfite, glycine ethyl ester and sodium azide, were 23.8, 61.9, 95.2 and 23.8%l, respectively, and the tyramine, was 14.3%. Several known peroxidase inhibitors and tyrosine analogue were blocked zona hardening in ionophore activated oocytes. 3. The treatment of exogeneous peroxidase promoted the zona hardening of activated oocytes but not unactivated oocytes. These resuls indicate that the ovoperoxidase apparently catalyzes the hardening of the zona following ionophore activation of mouse oocytes.

• 농약과학회지
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• 제5권1호
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• pp.36-45
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• 2001

본 연구는 새로운 제초제 후보물질을 탐색하기 위하여 식물특이적 효소 저해제로 알려진 107개 기존 화합물에 대하여 생물활성을 조사하였다. Germination test, seedling assay, wheat leaf disc assay, cyanobacteria assay, whole plant assay를 통하여 15종의 저해제를 선발하였고 이들은 34종 효소를 저해하는 것으로 확인되었다. 이들 화합물 중에서 phenylhydrazine, purine, o-phenanthroline, oleylamine, 7,8-benzoquinoline, aminooxyacetic acid, dicyclohexylcarbodiimide 등은 성체를 이용한 온실 실험에서 높은 제초활성을 나타내었다. 7,8-benzoquinone, 8-hydroxyquinoline, 2,2'-dipyridyl 및 o-phenanthroline 등은 피, 벼, 토마토의 발아를 $1.25{\sim}5{\mu}M$의 농도에서도 억제하였다. 7,8-benzoquinoline, cyanuric fluoride, 4-methylpyrazole, tranylcypromine, oleylamine과 trifluoperazine 등은 $30{\sim}100{\mu}M$ 농도에서 cyanobacteria의 생육을 저해하였다. Dicyclohexyl carbodiimide와 chlorpromazine은 $100{\mu}M$ 농도에서 wheat leaf disc의 백화현상을 유기시켰다. 이상과 같이 생물학적 활성을 갖는 식물 특이적 효소저해제들은 신규제초제 후보물질을 선발하기 위한 새로운 대상효소로 이용될 수 있을 것으로 생각된다.

• Korean Journal of Acupuncture
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• 제20권2호
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• pp.77-92
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• 2003

Objective; This study was investigated to test the anti-anemic effects of Danggwibohyeol-tang for herbal acupuncture on rat with anemia induced by phenylhydrazine according to composition ratio. Methods; Danggwibohyeol-tang herbal-acupuncture was administered into Kyoksu(膈兪穴, BL17) and RBC, Hemoglobin, Hematocrit, MCV, MCH, MCHC, RDW, platelet, MPV, PDW, indirect bilirubin and lactate dehydrogenase were tested. Results; The obtained results are summarized as follows: (1) In control group RBC was significantly reduced in comparison with normal group. And in Danggwibohyeol-tang group A, B, C there was significant inhibitory effect on reduction in comparison with control group. The effect of Danggwibohyeol-tang group C was similiar to that of Danggwibohyeol-tang group B and was higher than that of Danggwibohyeol-tang group A. (2) In control group hemoglobin was significantly reduced in comparison with normal group. And in Danggwibohyeol-tang group A, B, C there was significant inhibitory effect on reduction in comparison with control group but there was no significant difference between Danggwibohyeol-tang group A, B, C. (3) In control group hematocrit was significantly reduced in comparison with normal group. And in Danggwibohyeol-tang group A, B, C there was significant inhibitory effect on reduction in comparison with control group. The effect of Danggwibohyeol-tang group C was higher than that of Danggwibohyeol-tang group A or B. (4) In case of MCV, MCH, MCHC and RDW there was no significant anti-anemic effect. (5) Danggwibohyeol-tang group significantly inhibited the growth of platelet. In case of Danggwibohyeol-tang A and B group there was more inhibitory effect than Danggwibohyeol-tang C group but there was no significant difference between Danggwibohyeol-tang A and B group. (6) In case of MPV, PDW and indirect bilirubin there was no significant difference between Danggwibohyeol-tang group and control group. (7) Danggwibohyeol-tang group significantly inhibited the growth of lactate dehydrogenase. In case of Danggwibohyeol-tang C group there was more inhibitory effect than Danggwibohyeol-tang B group and Danggwibohyeol-tang B group showed more inhibitory effect than Danggwibohyeol-tang A group. Conclusion; From above results Danggwibohyeol-tang for herbal acupuncture showed significant anti-anemic effect in some parameters. Further study is needed for the effect of Danggwibohyeol-tang according to different composition ratio.