Research Index | Medline Index
Cannabis Research - cannabis contents, cannabinoid ratios, THC contents
- Authors
- Baker PB, Taylor BJ, Gough TA
- Title
- The tetrahydrocannabinol and tetrahydrocannabinolic acid content of
cannabis products.
- Source
- Journal of Pharmacy & Pharmacology
- Date
- 1981 Jun
- Issue
- 33(6)
- Pages
- 369-72
- Abstract
- Cannabinoid acids readily decarboxylate to the corresponding
cannabinoid. Methods are available for the determination of delta
9-tetrahydrocannabinol (THC) and its acids (THCA) and published data
on the levels of these compounds in cannabis are summarized. Using
gas and liquid chromatography, fresh cannabis (64 samples) and
cannabis resin (26 samples) from different countries were examined.
Wide variations in the relative amounts of THCA and THC in cannabis
were found. For cannabis resin, a wide range of values was also
found (0.5: 1 to 6.1: 1), the lower values being in resins from the
Indian sub-continent and the higher values in resins from the
Mediterranean area. Total THC values were in the range 1.0 - 10.6%
in cannabis and 6.0 - 12.5% in cannabis resin.
- Authors
- Field BI, Arndt RR
- Title
- Cannabinoid compounds in South African Cannabis sativa L.
- Source
- Journal of Pharmacy & Pharmacology
- Date
- 1980 Jan
- Issue
- 32(1)
- Pages
- 21-4
- Abstract
- Dagga (Cannabis sativa L.) samples were collected from various
geographical regions of South Africa. These were classified into
age, sex and plant part and the cannabinoids were analysed
quantitatively by gas-liquid chromatography and mass spectrometry.
Analytical results show that there appears to be at least three
chemovariants of Cannabis sativa growing in South Africa with
respect to relative cannabinoid content. One of these variants
appears to be unique to Southern Africa. It also appears that South
African C. sativa ranks among the world's more potent C. sativa
variants in terms of its delta 9-tetrahydrocannabinol content.
- Authors
- Baker PB, Gough TA, Taylor BJ
- Title
- The physical and chemical features of Cannabis plants grown in the
United Kingdom of Great Britain and Northern Ireland from seeds of
known origin--Part II: second generation studies.
- Source
- Bulletin on Narcotics
- Date
- 1983 Jan-Mar
- Issue
- 35(1)
- Pages
- 51-62
- Abstract
- A second generation of Cannabis plants has been grown from seeds
produced by first generation plants which were raised in the United
Kingdom of Great Britain and Northern Ireland from seeds taken from
imported cannabis of known geographical origin and chemistry. The
gross physical appearance of the second generation plants, in
general, resembled their parents and the cannabis produced therefrom
was not usually distinguishable from that derived from first
generation plants. Although cannabinoid patterns were, in some
cases, similar to those of both parents and original seedstock
cannabis, there were many exceptions. The yields of cannabis were
significantly higher than from first generation plants, but the
tetrahydrocannabinol contents were lower. Although higher than in
the original imported cannabis, the tetrahydrocannabinolic acid to
tetrahydrocannabinol ratios in cannabis from second generation
plants were lower than in cannabis produced from first generation
plants.
- Authors
- Baker PB, Gough TA, Johncock SI, Taylor BJ, Wyles LT
- Title
- Variation in the THC content in illicitly imported Cannabis
products--Part II.
- Source
- Bulletin on Narcotics
- Date
- 1982 Jul-Dec
- Issue
- 34(3-4)
- Pages
- 101-8
- Abstract
- The tetrahydrocannabinol (THC) contents of 220 samples of fresh
illicit Cannabis products seized on entry into the United Kingdom of
Great Britain and Northern Ireland over the period 1979-1981 have
been determined by gas chromatography. During that period there was
a general increase in the quality of both cannabis and cannabis
resin, but with wide variations in THC contents both within and
between countries. Some very high quality samples of cannabis,
cannabis resin and cannabis oil from the Indian sub-continent have
been analysed. There have been considerable changes in the number of
fresh samples from several countries, compared with the previous
survey. Fresh cannabis oil samples were very rare during the period
covered by this survey.
- Authors
- Baker PB, Gough TA, Taylor BJ
- Title
- The physical and chemical features of Cannabis plants grown in the
United Kingdom of Great Britain and Northern Ireland from seeds of
known origin.
- Source
- Bulletin on Narcotics
- Date
- 1982 Jan-Mar
- Issue
- 34(1)
- Pages
- 27-36
- Abstract
- Cannabis plants have been grown in the United Kingdom of Great
Britain and Northern Ireland from seeds taken from seizures of
cannabis of known geographical origin and chemistry. The gross
physical appearance and cannabinoid patterns of many of the cannabis
samples produced in the United Kingdom were closely related to those
of the parents. However, some notable exceptions were recorded.
There were wide variations in actual tetrahydrocannabinol content
between plants grown from different seedstock and rather smaller
variations within the groups grown from the same seedstock. Cannabis
produced in the united Kingdom and higher tetrahydrocannabinolic
acid/tetrahyrocannabinol ratios than imported material.
- Authors
- Baker PB, Bagon KR, Gough TA
- Title
- Variation in the THC content in illicitly imported Cannabis
products.
- Source
- Bulletin on Narcotics
- Date
- 1980
- Issue
- 32(4)
- Pages
- 47-54
- Abstract
- The tetrahydrocannabinol (THC) content of 304 seizures of illicit
Cannabis products was determined using gas chromatography. This
procedure results in the conversion of THC acid to THC itself and
thus gives the total THC content of the material, which reflects its
potency as experienced by the smokers. The study was carried out
over three years, thus enabling comparisons to be made between THC
levels from a given country of origin over this time span in
addition to any variations between the countries. In the early part
of the study, herbal cannabis from South East Asia was consistently
the best quality and that from the Caribbean the poorest quality. In
the third year of the study, the material from South East Asia was
in general no richer in THC than material from other areas of the
world. Cannabis resins normally had higher THC contents than most
herbal material, but the highest levels were found in "hash oil"
from the Middle East and the Indian subcontinent.
- Authors
- ElSohly HN, Ma GE, Turner CE, ElSohly MA
- Title
- Constituents of Cannabis sativa, XXV. Isolation of two new
dihydrostilbenes from a Panamanian variant.
- Source
- Journal of Natural Products
- Date
- 1984 May-Jun
- Issue
- 47(3)
- Pages
- 445-52
- Abstract
- Two new dihydrostilbene compounds (named cannabistilbenes I and II)
were isolated from a polar acidic fraction of a Panamanian variant
of Cannabis sativa grown in Mississippi. The structure of
cannabistilbene I was shown to be
3,4'-dihydroxy-5-methoxy-3'-(3-methylbut-2-enyl)-dihydrostilben e
(1) from spectral data which was confirmed by synthesis. There is
spectral evidence to indicate that cannabistilbene II could be
represented by either structure 3 or 4.
- Authors
- Elsohly HN, Turner CE
- Title
- Constituents of Cannabis sativa L. XXII: isolation of spiro-indan
and dihydrostilbene compounds from a Panamanian variant grown in
Mississippi, United States of America.
- Source
- Bulletin on Narcotics
- Date
- 1982 Apr-Jun
- Issue
- 34(2)
- Pages
- 51-6
- Abstract
- Three spiro-compounds, namely cannabispiran, dehydrocannabispiran
and beta-cannabispiranol, and 2 dihydrostilbenes
[3-(2-(3-hydroxy-4-methoxyphenyl)ethyl)-5-methoxyphenol and
canniprene] were isolated from a polar fraction of a Panamanian
variant of Cannabis sativa L. grown in Mississippi, United States of
America. The plant material was extracted with 95% ethanol and the
dried ethanol extract was then partitioned between chloroform and
water. The chloroform fraction was fractionated between hexane and
3N sodium hydroxide solution. Acidification of the basic fraction
followed by extraction with ether afforded a polar acidic fraction
from which the above-mentioned compounds were isolated through
repeated chromatography. The structures of the above compounds were
determined by spectral means as well as by comparison with reference
samples. The isolation of two dihydrostilbenes and three spiro-indan
compounds from a single variant provides good support that the
dihydrostilbenes are the natural precursors to the spiro-indan
compounds.
- Authors
- Yamamoto I, Matsunaga T, Kobayashi H, Watanabe K, Yoshimura H
- Title
- Analysis and pharmacotoxicity of feruloyltyramine as a new
constituent and p-coumaroyltyramine in Cannabis sativa L.
- Source
- Pharmacology, Biochemistry & Behavior
- Date
- 1991 Nov
- Issue
- 40(3)
- Pages
- 465-9
- Abstract
- Feruloyltyramine (FT), a new amide compound, together with
p-coumaroyltyramine (p-CT) was isolated and identified in ethanol
extract of cannabis seeds. FT and p-CT were also detected in the
roots, leaves and resin of Cannabis sativa L. The
intracerebroventricular injection of these amides caused hypothermia
and motor incoordination in mice, and the maximal effects were
caused 160 to 240 min after the injection. Furthermore, p-CT also
exhibited cataleptogenic effect in mice, although FT did not show
any effect. These results suggest that these amide compounds may be
responsible for some pharmacotoxicity of marihuana.
- Id Code
- 78211988
- Authors
- Valle JR, Vieira JE, Aucelio JG, Valio IF
- Title
- Influence of photoperiodism on cannabinoid content of Cannabis
sativa L.
- Source
- Bulletin on Narcotics
- Date
- 1978 Jan-Mar
- Issue
- 30(1)
- Pages
- 67-8
- Abstract
- Cannabis sativa plants submitted to 10 and 12 hours of natural light
showed different content in cannabinoids. An increase of exposure to
natural light of only 2 hours a day, at least, doubled the average
amoung of THC, but decreased that of cannabichromene.
- Id Code
- 80047045
- Authors
- Boeren EG, Elsohly MA, Turner CE
- Title
- Cannabiripsol: a novel Cannabis constituent.
- Source
- Experientia
- Date
- 1979 Oct 15
- Issue
- 35(10)
- Pages
- 1278-9
- Abstract
- Cannabiripsol [(-) (6aR, 9S, 10S,
10aR)9,10-dihydroxy-hexahydrocannabinol] (1), a new cannabinoid was
isolated from a South African Cannabis variant. The structure was
determined by spectral means and by synthesis.
- Id Code
- 79065322
- Authors
- Elsohly MA, Boeren EG, Turner CE
- Title
- (+/-)9,10-Dihydroxy-delta6a(10a)-tetrahydrocannabinol and
(+/-)8,9-dihydroxy-delta6a(10a)-tetrahydrocannabinol: 2 new
cannabinoids from Cannabis sativa L.
- Source
- Experientia
- Date
- 1978 Sep 15
- Issue
- 34(9)
- Pages
- 1127-8
- Abstract
- The structures of 2 new polyhydroxylated cannabinoids,
(+/-)9,10-dihydroxy-delta6a(10a)-tetrahydrocannabinol and
(+/-)8,9-dihydroxy-delta6a(10a)-tetrahydrocannabinol, obtained from
a hexane extract of an Indian Cannabis variant were determined by
spectral means and correlation with cannabinol.
- Id Code
- 78068704
- Authors
- Elsohly MA, Turner CE, Phoebe CH Jr, Knapp JE, Schiff PL Jr, Slatkin DJ
- Title
- Anhydrocannabisativine, a new alkaloid from Cannabis sativa L.
- Source
- Journal of Pharmaceutical Sciences
- Date
- 1978 Jan
- Issue
- 67(1)
- Pages
- 124
- Abstract
- Ethanol extracts of the leaves and roots of a Mexican variant of
Cannabis sativa L. (marijuana) afforded, after partitioning and
chromatography, the new spermidine alkaloid, anhydrocannabisativine.
The structure was determined by spectral analysis and semisynthesis.
- Id Code
- 78001902
- Authors
- Hillestad A, Wold JK, Paulsen BS
- Title
- Structural studies of water-soluble glycoproteins from Cannabis
sativa L.
- Source
- Carbohydrate Research
- Date
- 1977 Aug
- Issue
- 57
- Pages
- 135-44
- Abstract
- Two carbohydrate-protein fractions, isolated from Cannabis sativa L.
by extraction with water and chromatography of DEAE-cellulose,
contained arabinose, galactose, glucose, mannose, galacturonic acid,
2-acetamido-2-deoxyglucose, and 2-acetamido-2-deoxygalactose. The
structure of the carbohydrate moieties was investigated by
methylation analysis and Smith degradation. A high percentage of
end-groups indicates a large degree of branching, glucose and
galactose being the main branch-points, linked at C-3 and C6. The
hexoses are also present as unbranched residues in the chain,
largely as (1 leads to 3)- and (1 leads to 4)-linked units and as
end-groups. Arabinofuranosyl units constitute the main part of the
non-reducing end-groups, and are also present as part of the chain.
The polysaccharide chains are probably linked to protein through the
hydroxyl group of hydroxyproline.
- Id Code
- 77113083
- Authors
- Marshman JA, Popham RE, Yawney CD
- Title
- A note on the cannabinoid content of Jamaican ganja.
- Source
- Bulletin on Narcotics
- Date
- 1976 Oct-Dec
- Issue
- 28(4)
- Pages
- 63-8
- Abstract
- There has been considerable recent interest in the study of Jamaican
ganja users as a potentially valuable source of information on the
effects of long-term cannabis consumption. However, reported data on
the cannabinoid content of Jamaican material have been limited to
those of Rubin and Comitas for a small number of samples of unknown
representativeness. In the present study, the cannabinoid content
was determined on 36 samples purchased from various ganja dealers at
two different periods, derived from crops treated differently with
respect to fertilization, and representing the range of types
locally considered to differ in quality or potency. The analytical
results agreed well with those of Rubin and Comitas, and indicated
that samples with a delta9-THC content of 4.0% or more were apt to
be comparatively rare. The median value was 2.3% by weight. Some of
the variation in the THC content of the samples was clearly
attributable to the different seasons in which they were purchased,
and some may have been due to differences in the type of fertilizer
used in cultivation. Local judgement as to the potency of samples
proved generally sound, although by no means infallible.
- Id Code
- 86216789
- Authors
- Felby S, Nielsen E
- Title
- Cannabinoid content of cannabis grown on the Danish island of
Bornholm.
- Source
- Bulletin on Narcotics
- Date
- 1985 Oct-Dec
- Issue
- 37(4)
- Pages
- 87-94
- Abstract
- The analysis in 1983 of representative samples taken from fruiting
tops of seized cannabis plants illicitly grown in 19 localities on
the Danish island of Bornholm showed that the average (mean) content
of the total tetrahydrocannabinol (delta 9-tetrahydrocannabinol
(THC) + delta 9-tetrahydrocannabinolic acid) was approximately 1.55
per cent, ranging from 0.1 to 4.2 per cent. There was no significant
difference in the total THC content of cannabis plants from the
Danish island of Bornholm and the content found by other authors in
cannabis plants grown during the period from 1968 to 1972 in
Afghanistan, India, Mexico, South Africa and Thailand. However,
studies carried out on fresh cannabis seized on entry into the
United Kingdom of Great Britain and Northern Ireland during the
period 1975-1981 showed a larger content of THC (ranging from 2.3 to
4.9 per cent) than in cannabis plants from Bornholm.
- Id Code
- 86216787
- Authors
- Taylor BJ, Neal JD, Gough TA
- Title
- The physical and chemical features of Cannabis plants grown in the
United Kingdom of Great Britain and Northern Ireland from seeds of
known origin--Part III: Third and fourth generation studies.
- Source
- Bulletin on Narcotics
- Date
- 1985 Oct-Dec
- Issue
- 37(4)
- Pages
- 75-81
- Abstract
- Two further generations of Cannabis plants have been grown from
seeds produced by earlier generation plants which were raised in the
United Kingdom of Great Britain and Northern Ireland in 1980 and
1981. The original seedstocks were from known countries of origin.
Although there are exceptions, both the physical and chemical
characteristics of the third and fourth generation plants generally
resemble those of their parents. The yields of cannabis vary
substantially from year to year. The total tetrahydrocannabinol
contents also vary, but are comparable with the levels in the
original plants. Tetrahydrocannabinolic acid continues to
predominate over free tetrahydrocannabinol and is much higher than
in the original plants.
- Id Code
- 86216786
- Authors
- Cortis G, Luchi P, Palmas M
- Title
- Experimental cultivation of cannabis plants in the Mediterranean
area.
- Source
- Bulletin on Narcotics
- Date
- 1985 Oct-Dec
- Issue
- 37(4)
- Pages
- 67-73
- Abstract
- In research carried out in 1982, which included the cultivation of
cannabis plants with low, medium and high levels of delta
9-tetrahydrocannabinol (THC), the authors have determined the
parameters for individualization and classification of cannabis
plants according to their intoxicant potential. This can help to
provide courts of law with valid supportive expertise on cannabis
trafficking cases. The parameters are the percentages of THC in
cannabinoids and in the dried substance of a plant, as well as the
percentage of cannabinoids in the dried substance. On the basis of
these parameters, the authors have found that a cannabis plant in
which the percentage of THC exceeds 50 per cent of the total amount
of cannabinoids of the extractable resin and 0.3 per cent of the
total amount of dried substance, and in which the amounts of resin
and cannabinoids are substantial, has a considerable intoxicant
potential and is liable to be used for illicit production of
cannabis for abuse. On the contrary, a plant with a THC level below
50 per cent of the cannabinoids and 0.3 per cent of the dried
substance, in addition to a low level of total cannabinoids, has low
intoxicant potential and can be used in industry for the production
of oil and rope. On the basis of these parameters it is also
possible to predict the intoxicant potential of a young cannabis
plant harvested at a relatively early stage of its development.
- Id Code
- 86216785
- Authors
- Avico U, Pacifici R, Zuccaro P
- Title
- Variations of tetrahydrocannabinol content in cannabis plants to
distinguish the fibre-type from drug-type plants.
- Source
- Bulletin on Narcotics
- Date
- 1985 Oct-Dec
- Issue
- 37(4)
- Pages
- 61-5
- Abstract
- There are many different species of cannabis plants, but their
psychoactive properties mainly depend on the concentration of
tetrahydrocannabinol (THC), which may vary according to genetic
factors and environmental influences. On the basis of the THC
content all cannabis plants are divided into fibre-type and
drug-type plants. The fibre-type plant does not exceed 0.4 per cent
of THC while the drug-type plant usually contains up to 5 per cent
of THC, though higher percentages (up to 10 per cent) have been
reported. A study of the characteristics of cannabis seeds and the
influence of environmental conditions on the content of THC in
cannabis plants grown in northern, southern and insular Italy has
shown that the fibre-type plants contain mean values of THC in a
range from 0.058 to 0.299 per cent. The content of THC in the
drug-type plants grown in Sicily and Tuscany ranged from 0.82 to
1.31 per cent +/- 0.49 per cent. In 1984, the Commission of the
European Communities prepared a regulation to prevent diffusion of
the drug-type cannabis, providing that raw material could not be
imported if its THC content exceeded 0.5 per cent from 1984 to 1987
and after that period the maximum limit would be set up to 0.3 per
cent.
- Id Code
- 85225690
- Authors
- Barrett ML, Gordon D, Evans FJ
- Title
- Isolation from Cannabis sativa L. of cannflavin--a novel inhibitor
of prostaglandin production.
- Source
- Biochemical Pharmacology
- Date
- 1985 Jun 1
- Issue
- 34(11)
- Pages
- 2019-24
- Abstract
- The isolation from Cannabis sativa L. of an inhibitor of
prostaglandin (PG) E2 production by cultured rheumatoid synovial
cells is described. This agent, for which the name Cannflavin has
been coined, is distinct from cannabinoids on the basis of isolation
procedure, preliminary structural analysis and biological
properties. The activity of Cannflavin has been compared with
several established anti-inflammatory drugs and the major
cannabinoids.
- Id Code
- 91311547
- Authors
- Pitts JE, O'Neil PJ, Leggo KP
- Title
- Variation in the THC content of illicitly imported Cannabis
products--1984-1989.
- Source
- Journal of Pharmacy & Pharmacology
- Date
- 1990 Dec
- Issue
- 42(12)
- Pages
- 817-20
- Abstract
- The tetrahydrocannabinol (THC) content of more than 180 samples of
fresh illicit Cannabis products, seized by H.M. Customs and Excise
on entry into Great Britain and Northern Ireland over the period
1984-1989, has been determined by gas chromatography. The average
THC content of herbal cannabis remained high due to good quality
cannabis from Jamaica and the USA, but that of cannabis resin was
slightly lower. Resin from Morocco has changed significantly in its
physical appearance. There was no fresh seizure of cannabis oil in
this period.
- Id Code
- 88274689
- Authors
- Mikuriya TH, Aldrich MR
- Title
- Cannabis 1988. Old drug, new dangers. The potency question. [Review]
- Source
- Journal of Psychoactive Drugs
- Date
- 1988 Jan-Mar
- Issue
- 20(1)
- Pages
- 47-55
- Abstract
- Observation of the real world of social marijuana use, where
autotitration is the norm, renders the scare tactics of the new
marijuana proponents not only inaccurate but irrelevant. There is
much published evidence about the availability of highly potent
varieties of cannabis from the nineteenth century through the
present day. The effects attributed to the new marijuana are the
same ones debated for centuries in many different cultures. The
assertion that "all marijuana research to date has been done on 1 or
2 percent THC material" (Cohen 1968) ignores several thousand years
of human experience with the drug. The old medical cannabis extracts
were stronger than most of the forms now available, though the
potency of illicit hash oils by the mid-1970's was approaching the
level of medicinal preparations available before their removal from
the USP. While it may be true that sinsemilla is more widely
available than 10 or 15 years ago, its potency has not changed
significantly from the 2.4 to 9.5 percent THC materials available in
1973-1974 (see Table I), or the five to 14 percent sinsemilla of
1975 (Perry 1977). The range of potencies available then (marijuana
at 0.1% to 7.8% THC, averaging 2.0% to 5.0% THC by 1975) was
approximately the same as that reported now. With such a range, the
evidence simply cannot support the argument by Cohen (1986) that
marijuana is "ten or more times more potent than the product smoked
ten years ago." And to say that marijuana potency has increased
1,400 percent since any date in history is patent nonsense.(ABSTRACT
TRUNCATED AT 250 WORDS)
- References
- 98
- Id Code
- 89080515
- Authors
- Brenneisen R, elSohly MA
- Title
- Chromatographic and spectroscopic profiles of Cannabis of different
origins: Part I.
- Source
- Journal of Forensic Sciences
- Date
- 1988 Nov
- Issue
- 33(6)
- Pages
- 1385-404
- Abstract
- High-resolution capillary gas chromatography with flame ionization
detection and mass spectrometry (GC and GC/MS) and high-performance
liquid chromatography (HPLC) were used to establish complex chemical
profiles (chemical signatures) of Cannabis samples of known origin.
Over 100 compounds could be differentiated, including
noncannabinoids (terpenes, alkanes) as well as minor and major
cannabinoids and their acids. A characteristic peak pattern was
found within a limited number of specimens of identical origin.
Correlation studies on the basis of peak area ratios [A(x)/A(i.s.)]
showed the feasibility of tracing Cannabis chemically to its country
of origin. Several forensic science applications for the
chromatographic and spectroscopic profiles of confiscated Cannabis
samples are discussed, such as detection of additives
(phencyclidine), differentiation of chemotypes, and monitoring of
tetrahydrocannabinol (THC) potency.
- Id Code
- 86164895
- Authors
- Barrett ML, Scutt AM, Evans FJ
- Title
- Cannflavin A and B, prenylated flavones from Cannabis sativa L.
- Source
- Experientia
- Date
- 1986 Apr 15
- Issue
- 42(4)
- Pages
- 452-3
- Abstract
- Two novel prenylated flavones, termed Cannflavin A and B, were
isolated from the cannabinoid free ethanolic extract of Cannabis
sativa L. Both compounds inhibited prostaglandin E2 production by
human rheumatoid synovial cells in culture.
- Id Code
- 95283785
- Authors
- Sakakibara I, Ikeya Y, Hayashi K, Okada M, Maruno M
- Title
- Three acyclic bis-phenylpropane lignanamides from fruits of Cannabis
sativa.
- Source
- Phytochemistry
- Date
- 1995 Mar
- Issue
- 38(4)
- Pages
- 1003-7
- Abstract
- Three new acyclic bis-phenylpropane lignanamides, named cannabisin
E, F and G were isolated from the fruits of Cannabis sativa. Their
structures have been elucidated based on spectral and chemical
evidence.
- Id Code
- 93108232
- Authors
- Pitts JE, Neal JD, Gough TA
- Title
- Some features of Cannabis plants grown in the United Kingdom from
seeds of known origin.
- Source
- Journal of Pharmacy & Pharmacology
- Date
- 1992 Dec
- Issue
- 44(12)
- Pages
- 947-51
- Abstract
- The cannabinoid content of UK-grown plants (up to the 6th
generation) from Moroccan, Sri Lankan and Zambian seedstock was
determined by TLC, GLC and HPLC. All plants from the 5th and 6th
series resembled their parents, and UK-grown plants were always much
greener than those grown overseas. Cannabinoid content remained
broadly typical of the source countries. However,
tetrahydrocannabinolic acid (THCA) consistently predominated over
tetrahydrocannabinol (THC) to a far greater extent than in the
original plants; the THCA/THC ratio was 17 in UK-grown plants
compared with 2.0 in the plants from the original areas. Two types
of plant emerged from the Moroccan seedstock, one tending to
increased cannabidiol (CBD), the other tending to zero levels of
this component. The first generation Sri Lankan plants revealed one
type of plant with an increased CBD/THC ratio (1.7 compared with
0.11) but this returned to the original value in the succeeding
generations. Other Sri Lankan plants had low or undetectable levels
of CBD. Moroccan and Sri Lankan CBD-rich plants did not contain
cannabichromene, although this cannabinoid was found in THC-rich
plants. Zambian plants did not appear to show such a pattern.
Zambian seedstock plants had total tetrahydrocannabivarin (diol and
acid) levels greater than THC but the ratio was progressively
reversed in succeeding generations. The study concludes that the
ratios of particular cannabinoids is greatly influenced by the
environment.
- Authors
- - Odani S, Odani S
- Title
- - Isolation and primary structure of a methionine- and cystine-rich seed
protein of Cannabis sativa.
- Language
- - Eng
- Date
- - 1998 Apr
- Issue
- - 0916-8451
- Source
- - Biosci Biotechnol Biochem
- Pages
- - 650-4
- Country
- - JAPAN
- Abstract
- - A 10-kDa protein was isolated from resting seeds of hemp (Cannabis
sativa) by buffer extraction, gel filtration, ion-exchange
chromatography, and reversed-phase high-pressure liquid chromatography.
The protein did not inhibit bovine trypsin. It consisted of subunits
composed of 27 and 61 residues and was held together by two disulfide
bonds. The complete amino acid sequence was identified by protein
analysis, and had 20 mole% of amino acids containing sulfur. The
protein was most similar to a methionine-rich protein of Brazil nut
(Bertholletia excelsa) and to Mabinlin IV, a sweetness-inducing protein
of Capparis masaikai. The high methionine content and the absence of
trypsin inhibitory activity suggested that the seed protein can be used
to improve the nutritional quality of plant food-stuffs.
- Research Institute
- - Department of Home Economics, Faculty of Education, Niigata University,
Japan.
- Source
- - Biosci Biotechnol Biochem 1998 Apr;62(4):650-4