WordNet

possessing no distinctive quality or characteristics
one who does not side with any party in a war or dispute
having no net electric charge (同)electroneutral
lacking distinguishing quality or characteristics; "a neutral personality that made no impression whatever"
not supporting or favoring either side in a war, dispute, or contest
of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies (同)reddish, ruddy, blood-red, carmine, cerise, cherry, cherry-red, crimson, ruby, ruby-red, scarlet
red color or pigment; the chromatic color resembling the hue of blood (同)redness
the syllable naming the second (supertonic) note of any major scale in solmization (同)ray
a tributary of the Mississippi River that flows eastward from Texas along the southern boundary of Oklahoma and through Louisiana (同)Red River

PrepTutorEJDIC

『中立の』;中立国の / 『公平な』,不偏不党の / (人・物が)特色のはっきりしない;(色が)はっきりしない,くすんだ / (酸性でもアルカリ性でもない)中性の / (電気が)中性の,(物体が)帯電していない / (自動車などのギアが)ニュートラルの / (文法で)中性の / 〈C〉(戦争・論争などで)中立の人;中立国民;中立国 / 〈C〉くすんだ色,灰色 / 〈U〉(自動車などのギヤの)ニュートラル(動力のかかっていない状態・位置)
〈U〉〈C〉『赤,』『赤色;』赤い絵の具(染料) / 〈U〉赤い服 / 〈C〉《しばしば『R-』》《話》《時に軽べつして》アカ,共産主義者;過激論(主義)者 / 〈U〉《通例the ~》(会計の)赤字,負債 / 『赤い』,赤色の / (顔・目などが)赤くなった;血に染った / 赤い服を着た;赤毛の / 《しばしば『R-』》《話》《軽べつして》共産主義の;過激な
レ(全音階の第2音)
roentgen / recto

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/06/08 15:20:25」(JST)

wiki en

Neutral red (pH indicator)
below pH 6.8		above pH 8.0
6.8	⇌	8.0

Neutral red (toluylene red, Basic Red 5, or C.I. 50040) is a eurhodin dye used for staining in histology. It stains lysosomes red.^[1] It is used as a general stain in histology, as a counterstain in combination with other dyes, and for many staining methods. Together with Janus Green B, it is used to stain embryonal tissues and supravital staining of blood. Can be used for staining Golgi apparatus in cells and Nissl granules in neurons.

In microbiology, it is used in the MacConkey agar to differentiate bacteria for lactose fermentation.

Neutral red can be used as a vital stain. Live cells incorporate neutral red into their lysosomes. As cells begin to die, their ability to incorporate neutral red diminishes. Thus, loss of neutral red uptake corresponds to loss of cell viability.^[2] It is also used to stain cell cultures for plate titration of viruses.^[2]

Neutral red is added to some growth media for bacterial and cell cultures. It usually is available as a chloride salt.

Neutral red acts as a pH indicator, changing from red to yellow between pH 6.8 and 8.0.

References

^ Winckler, J. Vital staining of lysosomes and other cell organelles of the rat with neutral Red. Prog. Histochem. Cytochem. 6, 1–89 (1974).
^ ^a ^b RepettoG, del Peso A, Zurita JL. Neutral red uptake assay for the estimation of cellviability/cytotoxicity. Nat Protoc. 2008;3(7):1125–1131.doi:10.1038/nprot.2008.75.

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関連記事	「red」「neutral」

「red」

Neutral red
Solid Neutral Red	Neutral Red Aqueous Solution
Names
	IUPAC name 3-Amino-7-dimethylamino-2-methylphenazine hydrochloride
	Other names toluylene red
Identifiers
CAS Number	553-24-2 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:86370 ;
ChemSpider	10634 ;
ECHA InfoCard	100.008.215
	InChI InChI=1S/C15H16N4.ClH/c1-9-6-13-15(8-11(9)16)18-14-7-10(19(2)3)4-5-12(14)17-13;/h4-8H,16H2,1-3H3;1H Key: PGSADBUBUOPOJS-UHFFFAOYSA-N ; InChI=1/C15H16N4.ClH/c1-9-6-13-15(8-11(9)16)18-14-7-10(19(2)3)4-5-12(14)17-13;/h4-8H,16H2,1-3H3;1H Key: PGSADBUBUOPOJS-UHFFFAOYAB ;
	SMILES Cl.n1c3c(nc2c1cc(c(c2)N)C)cc(N(C)C)cc3 ;
Properties
Chemical formula	C15H17ClN4
Molar mass	288.78 g/mol
Melting point	290 °C (554 °F; 563 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	verify (what is ?)
	Infobox references

　　[★]

adj.

赤色の、赤、赤い

関: erythro

「neutral」

　　[★]

adj.

中性の、中立の

[1] Winckler, J. Vital staining of lysosomes and other cell organelles of the rat with neutral Red. Prog. Histochem. Cytochem. 6, 1–89 (1974).

[:0-2] RepettoG, del Peso A, Zurita JL. Neutral red uptake assay for the estimation of cellviability/cytotoxicity. Nat Protoc. 2008;3(7):1125–1131.doi:10.1038/nprot.2008.75.

v t e Microbial and histological stains
Iron/hemosiderin	Prussian blue
Lipids	Sudan stain Sudan II Sudan III Sudan IV Oil Red O Sudan Black B
Carbohydrates	Periodic acid–Schiff stain
Amyloid	Congo red
Bacteria	Gram staining Methyl violet/Gentian violet Safranin Ziehl–Neelsen stain/acid-fast Carbol fuchsin/Fuchsine Methylene blue Auramine-rhodamine stain Auramine O Rhodamine B
Connective tissue	trichrome stain: Masson's trichrome stain/Lillie's trichrome Light Green SF yellowish Biebrich scarlet Phosphomolybdic acid Fast Green FCF Van Gieson's stain
Other	H&E stain Haematoxylin Eosin Y Silver stain Grocott's methenamine silver stain Warthin–Starry stain Methyl blue Wright's stain Giemsa stain Gömöri trichrome stain Neutral red Janus Green B Alcian blue stain Movat's stain
Tissue stainability	Acidophilic Basophilic Chromophobic

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案内

neutral red