WordNet

cowardly or treacherous; "the little yellow stain of treason"-M.W.Straight; "too yellow to stand and fight"
turn yellow; "The pages of the book began to yellow"
yellow color or pigment; the chromatic color resembling the hue of sunflowers or ripe lemons (同)yellowness
changed to a yellowish color by age; "yellowed parchment" (同)yellowed
of the color intermediate between green and orange in the color spectrum; of something resembling the color of an egg yolk (同)yellowish, xanthous
utter or declare in a very loud voice; "You dont have to yell--I can hear you just fine" (同)scream
the univalent radical CH3- derived from methane (同)methyl_group, methyl radical

PrepTutorEJDIC

『黄色の』 / 皮膚の黄色い / 《俗》おく病な(cowardly) / (新聞が)センセーショナルな,扇情的な / 〈U〉『黄色』 / 〈C〉黄色いもの;卵黄 / 〈U〉〈C〉黄色の絵の具(顔料,染料),黄色の服 / …‘を'黄色にする / 黄色になる
(…を求めて)『大声で叫ぶ』《+for+名》;(…に)大声をあげる《+at+名》 / (…に向かって)…‘を'叫んで(大声で)言う《+out+名(+名+out)+at(to)+名》 / 『叫び声』金切り声,わめき

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/01/04 00:17:20」(JST)

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Methyl yellow, or C.I. 11020, is a chemical compound which may be used as a pH indicator.

Methyl yellow (pH indicator)
below pH 2.9		above pH 4.0
2.9	↔	4.0

In aqueous solution at low pH, methyl yellow appears red. Between pH 2.9 and 4.0, methyl yellow undergoes a transition, to become yellow above pH 4.0.

Additional indicators are listed in the article on pH indicators.

It is a possible carcinogen.^[1]

As "butter yellow" the agent had been used as a food additive before its toxicity was recognized.^[2]

References[edit]

^ NIOSH Pocket Guide to Chemical Hazards 0220
^ Opie, E. L. (1944). "The Pathogenesis of Tumors of the Liver Produced by Butter Yellow" (pdf). The Journal of Experimental Medicine 80 (3): 231–246. PMC 2135460. PMID 19871411.

External links[edit]

International Chemical Safety Card 1498
"para-dimethylaminoazobenzene". Inchem.
CDC - NIOSH Pocket Guide to Chemical Hazards
Chung, K. T.; Fulk, G. E.; Andrews, A. W. (1981). "Mutagenicity testing of some commonly used dyes" (pdf). Applied and Environmental Microbiology 42 (4): 641–648. PMC 244076. PMID 7039509.

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 食品添加物に対するアレルギー反応および喘息反応 allergic and asthmatic reactions to food additives
2. 旅行者のための予防接種 immunizations for travel
3. 妊娠中の予防接種 immunizations during pregnancy
4. HIV感染患者における予防接種 immunizations in hiv infected patients
5. 黄熱 yellow fever

English Journal

A sensitive colorimetric method for the determination of nitrite in water supplies, meat and dairy products using ionic liquid-modified methyl red as a colour reagent.

Zhang H1, Qi S2, Dong Y1, Chen X1, Xu Y1, Ma Y1, Chen X3.Author information 1State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China; College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.2State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China; College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China. Electronic address: qishd@lzu.edu.cn.3State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China; College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou 730000, China. Electronic address: chenxg@lzu.edu.cn.AbstractThis paper describes a colorimetric approach to determine trace amounts of nitrite in water supplies, meat and dairy products using 1-butyl-3-methylimidazolium-modified methyl red ([BMIM]MR) as a colour reagent. The technique capitalises on the catalytic effect of nitrite on the oxidative degradation of [BMIM]MR by potassium bromate in acidic media. The absorbances were proportional to nitrite concentrations in the range of 8.70×10(-2) to 4.17μM with a detection limit of 1.64×10(-2)μM. Compared with the method using methyl red as a colour reagent, 60 times improvement of sensitivity was obtained. Activation energy and the apparent rate constant for the catalytic reaction are 61.11kJmol(-1) and 1.18×10(4)s(-1), respectively. The proposed method was successfully applied for the analysis of nitrite in Yellow River water, chicken, and milk with recoveries ranging from 96% to 105%.
Food chemistry.Food Chem.2014 May 15;151:429-34. doi: 10.1016/j.foodchem.2013.11.016. Epub 2013 Nov 18.
This paper describes a colorimetric approach to determine trace amounts of nitrite in water supplies, meat and dairy products using 1-butyl-3-methylimidazolium-modified methyl red ([BMIM]MR) as a colour reagent. The technique capitalises on the catalytic effect of nitrite on the oxidative degradatio
PMID 24423553

Phytochemical and physical-chemical analysis of Polish willow (Salix spp.) honey: identification of the marker compounds.

Jerković I, Kuś PM, Tuberoso CI, Šarolić M.Author information Department of Organic Chemistry, Faculty of Chemistry and Technology, University of Split, N. Tesle 10/V, 21000 Split, Croatia. Electronic address: igor@ktf-split.hr.AbstractThe case study of Polish Salix spp. honey was compared with published data on willow honey from other regions. GC-FID/MS (after HS-SPME and ultrasonic solvent extraction) and targeted HPLC-DAD were applied. Phenolic content, FRAP/DPPH assays and the colour coordinates were determined spectrophotometrically. Beside ubiquitous linalool derivatives, borneol (up to 10.9%), bicyclic monoterpenes with pinane skeleton (pinocarvone up to 10.6%, myrtenal up to 4.8% and verbenone up to 3.4%) and trans-β-damascenone (up to 13.0%) dominated in the headspace. The main compounds of the extractives were vomifoliol (up to 39.6%) and methyl syringate (up to 16.5%) along with not common 4-hydroxy-3-(1-methylethyl)benzaldehyde (up to 11.1%). Abscisic acid (ABA) was found (up to 53.7 mg/kg) with the isomeric ratio (Z,E)-ABA:(E,E)-ABA=1:2. The honey exhibited low antioxidant potential with pale yellow colour. The composition of Polish willow honey is similar to Mediterranean willow honeys with several relevant differences.
Food chemistry.Food Chem.2014 Feb 15;145:8-14. doi: 10.1016/j.foodchem.2013.08.004. Epub 2013 Aug 9.
The case study of Polish Salix spp. honey was compared with published data on willow honey from other regions. GC-FID/MS (after HS-SPME and ultrasonic solvent extraction) and targeted HPLC-DAD were applied. Phenolic content, FRAP/DPPH assays and the colour coordinates were determined spectrophotomet
PMID 24128442

Analysis of a silkworm F₁ hybrid with yellow cocoon generated by crossing two white-cocoon strains: further evidences for the roles of Cameo2 and CBP in formation of yellow cocoon.

Chai C, Zhang Y, Sun W, Ding G, Wang W, Liu Y, Dai F, Lu C.Author information College of Biotechnology, Southwest University, Chongqing 400715, China.AbstractIn this report, we examined the gene expression related to carotenoid transport for a silkworm F1 hybrid with yellow cocoon generated by crossing two white-cocoon strains, Qiubai and 12-260. Our results showed that, in Qiubai, Cameo2, a transmembrane protein gene belonging to the CD36 family genes, was expressed normally in the silk gland, but no intact carotenoid-binding protein (CBP) mRNA (only the truncated CBP mRNA) was detected in the midgut. In 12-260, we detected the intact CBP mRNA expression in the midgut, but no Cameo2 expression in the silk gland. Regarding the F1 hybrid from crossing Qiubai and 12-260, both Cameo2 and intact CBP mRNA expressed normally in the silk gland and midgut. HPLC detection confirmed that in the F1 hybrid the carotenoids could be absorbed from dietary mulberry leaves through the midgut and transferred to silk gland via the hemolymph, which eventually colored cocoons into yellow. We also identified four CBP mRNA isoforms expressed in the midgut of the F1 hybrid, subsequently named as variants 5-8. Our results provide further evidences for the roles of Cameo2 and CBP in the formation of yellow cocoon of silkworm.
Gene.Gene.2014 Jan 15;534(1):119-23. doi: 10.1016/j.gene.2013.10.030. Epub 2013 Oct 22.
In this report, we examined the gene expression related to carotenoid transport for a silkworm F1 hybrid with yellow cocoon generated by crossing two white-cocoon strains, Qiubai and 12-260. Our results showed that, in Qiubai, Cameo2, a transmembrane protein gene belonging to the CD36 family genes,
PMID 24157262

Japanese Journal

Printable Top-Gate-Type Polymer Light-Emitting Transistors with Surfaces of Amorphous Fluoropolymer Insulators Modified by Vacuum Ultraviolet Light Treatment

Kajii Hirotake,Terashima Daiki,Kusumoto Yusuke,Ikezoe Ikuya,Ohmori Yutaka
Jpn J Appl Phys 52(4), 04CK01-04CK01-4, 2013-04-25
… It was found that the poly(methyl methacrylate) (PMMA) film prevented the degradation of the F8BT layer under VUV irradiation because the PMMA film can absorb VUV. … The solution-processed F8BT device with multilayer PMMA/CYTOP insulators utilizing a gate electrode fabricated using the Ag nano-ink exhibited both the ambipolar characteristics and yellow-green emission. …
NAID 150000106769

Inhibitory effects of hydroxysafflor yellow A on the formation of advanced glycation endproducts in vitro

Ni Zhenzhen,Zhuge Zhengbing,Li Wenlu [他],Xu Huimin,Zhang Zhongmiao,Dai Haibin
Biological and Pharmaceutical Bulletin, 2050-2053, 2012
… To investigate the inhibitory effects of hydroxysafflor yellow A (HSYA) on the protein glycation in vitro. … Using BSA-glucose assay, BSA-methylglyoxal (MGO) assay, and N-acetylglycyl-lysine methyl ester (G.K.) peptide-ribose assay, inhibitory effects of HSYA were investigated. …
NAID 130001872249

歯面漂白用レジンコート材の開発-可視光応答型TiO2含有コート材の漂白効果-

亀水秀男,駒田裕子,大田優,加藤大貴,佐藤峻介,松田卓朗,大元秀一,飯島まゆみ,若松宣一,足立正徳,澁谷俊昭,土井豊
岐阜歯科学会雑誌 38(2), 58-66, 2011-10-20
この研究は,可視光応答型TiO2を含む歯面漂白用レジンコート材の開発とその漂白効果を検討することを目的としている.TiO2はアナターゼ型を使用し,可視光応答化のために銀の光析出処理を行った.可視光応答型TiO2の光触媒活性能は,可視光照射下(5〜60分間)でのメチレンブルー水溶液(MB)の退色実験により評価した.また,可視光応答型TiO2含有レジンコート材は,可視光応答型TiO2と市販のMMA系即 …
NAID 110008705250

「パラジメチルアミノアゾベンゼン」

Methyl yellow
	IUPAC name p-Dimethylaminoazobenzene
	Other names 4-Dimethylaminoazobenzene, DAB, N,N-Dimethyl-4-phenylazoaniline, N,N-Dimethyl-4-aminoazobenzene, Butter Yellow, Solvent Yellow 2, C.I. 11020
Identifiers
CAS number	60-11-7
PubChem	6053
ChemSpider	5829
UNII	A49L8E13FD
EC number	200-455-7
ChEMBL	CHEMBL263116
RTECS number	BX7350000
Jmol-3D images	Image 1
	SMILES N(=N/c1ccccc1)\c2ccc(N(C)C)cc2 ;
	InChI InChI=1S/C14H15N3/c1-17(2)14-10-8-13(9-11-14)16-15-12-6-4-3-5-7-12/h3-11H,1-2H3/b16-15+ ; Key: JCYPECIVGRXBMO-FOCLMDBBSA-N InChI=1/C14H15N3/c1-17(2)14-10-8-13(9-11-14)16-15-12-6-4-3-5-7-12/h3-11H,1-2H3/b16-15+; Key: JCYPECIVGRXBMO-FOCLMDBBBF ;
Properties
Molecular formula	C14H15N3
Molar mass	225.289 g.mol-1
Appearance	Yellow crystals
Melting point	116 °C (decomposes)
Solubility in water	13.6 mg.l-1
log P	4.58
Hazards
R-phrases	R25, R40
S-phrases	S36/37, S45
Main hazards	Toxic (T)
NFPA 704	1 2 0
	(verify) (what is: /?); Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
	Infobox references