- Benzoin resin
or styrax resin is a balsamic resin obtained from the bark of several
species of trees in the genus
- It is used in
perfumes, some kinds of incense, and medicine (see tincture of benzoin).
It principally contains benzoic acid.
called "benzoin", it is called "benzoin resin" here to distinguish it from
the crystalline compound benzoin. Benzoin resin does not contain
this crystalline compound.
- Benzoin is also
called gum benzoin or gum benjamin, but "gum" is incorrect as benzoin is
not a water-soluble polysaccharide. Its name probably came via Italian
from Arabic lubān jāwī = "frankincense from Java", because it was
brought from Indonesia.
A multi-step synthesis of any organic compound requires the chemist to
accomplish three related tasks:
1. Constructing the
carbon framework or skeleton of the desired molecule.
2. Introducing, removing
or transforming functional groups in a fashion that achieves the
functionality of the desired compound.
3. Exercising selective
stereocontrol at all stages in which centers of stereoisomerism are created
4. Since a successful
synthesis must produce the desired product in reasonable amount, it should
be as short and efficient.
5. The format of a
synthesis is important.
compounds are compounds that could release biochemical substances under
irradiation of UV light.
- They have quite a
lot of applications. For example, they could enable biochemists to control
the release of bioactive compounds in living tissue.
- This project is to
use time-resolved resonance Raman spectroscopy to directly investigate the
identity and structures of reaction intermediates in selected benzoin and
p-hydroxyphenacyl ester phototrigger compounds.
- Mechanisms for the
photorelease reactions could be better understood. Effect from different
substituents and environment would also be examined.
BIOASSAY OF BENZOIN FOR POSSIBLE
CARCINOGENICITY report presents the results of the bioassay of benzoin
conducted for the Carcinogenesis Testing Program, National Cancer
Institute (NCI) National Toxicology Program (NTP). This is one of a series
of experiments designed to determine whether selected chemicals have the
capacity to produce cancer in animals.
In the benzoin case reported by
Garcia et al. ETFRN Publication Series 20(this
volume), income from benzoin amounts to 14% of the total income for the
whole sample, and 30% for those harvesting benzoin (Angelsen et al.
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