Studies on the red sweat of the Hippopotamus amphibius

Kimiko Hashimoto, Yoko Saikawa, Masaya Nakata

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The secretion from the hippopotamus' skin changes its color from colorless to red, and then brown by polymerization of its pigments. The responsible pigments for the coloring reaction were isolated and denoted as hipposudoric acid (the red pigment) and norhipposudoric acid (the orange pigment). The syntheses of these pigments and the related derivatives were performed, and the latter were of use to elucidate the structures of these pigments including their tautomeric structures in aprotic and protic solvents. These pigments were estimated to be medicines for the hippopotamus, having the effect of both protecting the skin from sunburn and preventing infection by some microbes.

Original languageEnglish
Pages (from-to)507-517
Number of pages11
JournalPure and Applied Chemistry
Volume79
Issue number4
DOIs
Publication statusPublished - 2007 Apr

Fingerprint

Pigments
lissamine rhodamine B
Skin
Acids
Coloring
Medicine
Polymerization
Color
Derivatives

Keywords

  • Hippopotamus amphibius
  • Hipposudoric acid
  • Norhipposudoric acid
  • Pigments
  • Short hydrogen bonds
  • Sweat
  • Tautomers

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Studies on the red sweat of the Hippopotamus amphibius. / Hashimoto, Kimiko; Saikawa, Yoko; Nakata, Masaya.

In: Pure and Applied Chemistry, Vol. 79, No. 4, 04.2007, p. 507-517.

Research output: Contribution to journalArticle

Hashimoto, Kimiko ; Saikawa, Yoko ; Nakata, Masaya. / Studies on the red sweat of the Hippopotamus amphibius. In: Pure and Applied Chemistry. 2007 ; Vol. 79, No. 4. pp. 507-517.
@article{0c567b460a7b41068cee364e7a45b02b,
title = "Studies on the red sweat of the Hippopotamus amphibius",
abstract = "The secretion from the hippopotamus' skin changes its color from colorless to red, and then brown by polymerization of its pigments. The responsible pigments for the coloring reaction were isolated and denoted as hipposudoric acid (the red pigment) and norhipposudoric acid (the orange pigment). The syntheses of these pigments and the related derivatives were performed, and the latter were of use to elucidate the structures of these pigments including their tautomeric structures in aprotic and protic solvents. These pigments were estimated to be medicines for the hippopotamus, having the effect of both protecting the skin from sunburn and preventing infection by some microbes.",
keywords = "Hippopotamus amphibius, Hipposudoric acid, Norhipposudoric acid, Pigments, Short hydrogen bonds, Sweat, Tautomers",
author = "Kimiko Hashimoto and Yoko Saikawa and Masaya Nakata",
year = "2007",
month = "4",
doi = "10.1351/pac200779040507",
language = "English",
volume = "79",
pages = "507--517",
journal = "Pure and Applied Chemistry",
issn = "0033-4545",
publisher = "IUPAC Secretariat",
number = "4",

}

TY - JOUR

T1 - Studies on the red sweat of the Hippopotamus amphibius

AU - Hashimoto, Kimiko

AU - Saikawa, Yoko

AU - Nakata, Masaya

PY - 2007/4

Y1 - 2007/4

N2 - The secretion from the hippopotamus' skin changes its color from colorless to red, and then brown by polymerization of its pigments. The responsible pigments for the coloring reaction were isolated and denoted as hipposudoric acid (the red pigment) and norhipposudoric acid (the orange pigment). The syntheses of these pigments and the related derivatives were performed, and the latter were of use to elucidate the structures of these pigments including their tautomeric structures in aprotic and protic solvents. These pigments were estimated to be medicines for the hippopotamus, having the effect of both protecting the skin from sunburn and preventing infection by some microbes.

AB - The secretion from the hippopotamus' skin changes its color from colorless to red, and then brown by polymerization of its pigments. The responsible pigments for the coloring reaction were isolated and denoted as hipposudoric acid (the red pigment) and norhipposudoric acid (the orange pigment). The syntheses of these pigments and the related derivatives were performed, and the latter were of use to elucidate the structures of these pigments including their tautomeric structures in aprotic and protic solvents. These pigments were estimated to be medicines for the hippopotamus, having the effect of both protecting the skin from sunburn and preventing infection by some microbes.

KW - Hippopotamus amphibius

KW - Hipposudoric acid

KW - Norhipposudoric acid

KW - Pigments

KW - Short hydrogen bonds

KW - Sweat

KW - Tautomers

UR - http://www.scopus.com/inward/record.url?scp=34247562168&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34247562168&partnerID=8YFLogxK

U2 - 10.1351/pac200779040507

DO - 10.1351/pac200779040507

M3 - Article

AN - SCOPUS:34247562168

VL - 79

SP - 507

EP - 517

JO - Pure and Applied Chemistry

JF - Pure and Applied Chemistry

SN - 0033-4545

IS - 4

ER -