الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
========
of Kecic~Dal anj Arc~atic P13nt Research Section, Ag~i8ultuTe
Re aesr’c h C2nteT, -;’c=i.ristr,Y 0:’ AGriculture, Bar-r-age to study the
and
ct l , The e::’e::t (J} storage on the phy s.ic oc hecri.c aj, properties of oLo
ecsen tic.l oi:: and it 3 Chez.Lc 8.1 cO:i.p0.:Jiticn ~.i..l.s inve stigated as v~ell
The pt;5ic~1 9ro~eTties determined ~ere specific gravit,y , re~ra-
8:ive index, C’dticC.: rot~tiGn and sclubility dn alcohol.
Che~~cal c~ar38teriEtics include’ acid No., ester ~o., total
alcohole as benzsl alcohol and aldehsdes and ketones (as vanillin).
Chemical c~mpcsition ~as achieved by G.L.C. method where
eugenol, acetjl eugenol, cerryophyllen and myrcen ~ere identified.
Results obtained c ou.Ld be eummar-Laed as f’o L’l.owa :-
I - Steam distillation yielded the tighest percentage of clove
.oil ( especially from crushed cloves).
2 - No obvious cifferences were shown in specific gravity and
refractive indeJl for whole and crushed clove oils in respect
to isolation methods.
However oil extracted with dhlcrophorm had the highest·
values of sp. travit2 •
J - The isolation methods affected the optical rotation and
solubility in alcohol of clove eils ( whole and crushed clove
oil) •.
The ~ater cistilled oil was found to ba~e the highest
values of optic~l rotation and solubility in alcohol.
~------- -- -- ------~---------
(65 )
4 _ Values of acid No., ester No. aldehyoes ana ketones and total
~lcohols of whole ~nd crushed clove oils were influenced by
the methods 8f isolation i.e. extracted clove oil ~ad the
lo~est values of a~id No. and aloehydes and ketones cor.tents,
~hile it ~5S the highest values of ester No. and total alcohols.
5 - The stearr.aistilled oil mostls showed an increase in eugenol
conten t ,
6 ._ The steam distilled oil has the .lowest content of e.cetyl
eusenol and car30ppyllen. The opposi~e trend ~8S found in
c a se of myro en content Le -Lhebighest content of myrc en was
recorded in case of steam distilled oil.
7 _ Crushing treatment affected the ~hysical properties of water
distilled clove oil and steam distilled one by lo~ering the
s psc Lf Lc gravity ( below 1.06 ) and the s oLub LLd by in 70 %
alcohol.while the optical rotation of clove oil wes .
increased in comparison ~ith non crushing treatment
( whole cloves ).
8 _ Crushing treatment did not affect the refrae tive :Lndex of
we.ter and steam distilled clove oils.
9 - C~emical properties of water and steam distilled Clil ”,ere
affected b3 crushing i.e crushed clove oil had higher values
of ester No. than that of whole cloYe oil. Lower values of
acid No•• an4 total alcohol per cent ?fere recorded in case
of crushed clove oil.
10- Crushing treatment had no clear effect on aldeh3des and
ke tone s perc en t.
(66 )
aff~ctee OS crusting. G:!’Ueflee clove oil recoreed lower
c or,ten t of e ugenc L, whLLe canter ts of ac e t y L Eugenol, c aryophy
LLen and rnyr-c en were found t o be higher.-
I2- Generally, storage period affected the physical properties
of cleve c::’1.
Opticsl rotstL!L Lnc r s a se d dur-Lng the et or age per Lod
~hile scl~bilitJ iL 70 % slcchol deCY8SSed during the first
I3- Acic Ra. and aldeh~d8s and ketores increased during storage
perio~. Also eugenol content increased during storage period
excep t ~~or tulL;e .~•as t r0O o’ ays. Ester No. and total alcohols
dedreased during storage especislly during the first 60 days
-------- ._------
of Kecic~Dal anj Arc~atic P13nt Research Section, Ag~i8ultuTe
Re ae sr’c h C2nteT, -;’c=i.ristr,Y 0:’ AGriculture, Bar-r-age to study the
eff~ct c~ iS~:2tiDn TIe~hDj3 ( water, steaM distillation and
ctl, The e::’e::t (J} storage on the phy s.ic ochecri.c aj, properties of oLo
e c sen tic.l oi:: and it 3 Chez.Lc 8.1 cO:i.pO.:Jiticn -.i..I.s inve stigated as v~ell
The pt; 5ic~1 9ro~eTties determined ~ere specific gravit, y , re~ra-
8: i ve index, C’ dticC.: rot~tiGn and sclubili ty dn alcohol.
Che-v--ca I c~ar38teriEtics include’ acid No., ester ~o., total
alcohole as benzsl alcohol and aldehsdes and ketones (as vanillin).
Chemical c vmpc s i tion ~as achieved by G.L. C. method where
eugenol, acetjl eugenol, cerryophyllen and myrcen ~ere identified.
Resul ts obtained C ou.Ld be eummar-Laed as f’o L’l.owa
I - Steam distillation yielded the tighest percentage of clove
. oil (especially from crushed cloves).
2 - No obvious cifferences were shown in specific gravity and
refractive indeJl for whole and crushed clove oils in respect
to isolation methods.
However oil extracted with dhlcrophorm had the highest·
values of sp. travit2
J - The isolation methods affected the optical rotation and
solubili ty in alcohol of clove eils (whole and crushed clove
oil)
The <at.er cistilled oil was found to ba -e the highest
values of opt i c-T rotation and solubility in alcohol.
(65 )
4 Values of acid No., ester No. aldehyoes ana ketones and total
~lcohols of whole -rid crushed clove oils were influenced by
the methods 8f isolation i.e. extracted clove oil -ad the
lo~est values of a~id No. and aloehydes and ketones cor. tents,
-h i l e i t ~5S the highest values of ester No. and total alcohols.
5 - The stearr .aistilled oil mostls showed an increase in eugenol
conten t,
6 The steam distilled oil has the .lowest content of e. cetyl
eusenol and car3oppyllen.
case of myro en content Le
The opposi ~e trend ~8S found in
-Lhebighest content of myrc en was
7
recorded in case of steam distilled oil.
Crushing treatment affected the -hys i ca l properties of water
distilled clove oil and steam distilled one by Lo-ve r inq the
s psc Lf Lc gravity (below 1.06 ) and the s oLub LLd by in 70 %
alcohol. while the optical rotation of clove oil wes
increased in comparison ~ith non crushing treatment
(whole cloves ).
8 Crushing treatment did not affect the refrae tive :Lndex of
we. ter and steam distilled clove oils.
9 - C~emical
affected
properties
b3 crushing
of water and
i. e crushed
steam
clove
distilled Clil”, ere
oil had higher values
of ester No. than that of whole cloYe oil. Lower values of
acid No” an4 total alcohol per cent ?fere recorded in case
of crushed clove oil.
10- Crushing treatment had no clear effect on aldeh3des and
ke tone s perc en t.
(66 )
aff-ctee OS crus ting . G: ! ’Ueflee clove oil recoreed lower
eor,ten t of eugene L, whLLe canter ts of ac etyL Eugenol, C aryophy
LLen and rnyr-c en were found to be higher.-
I2- Generally, storage period affected the physical properties
of cleve c:: ’1.
Opticsl rotstL!L Lncr sase d dur-Lng the et or age per Lad
~hile scl-sbifit.I iL 70 % slcchol deCY8SSed during the first
I3- Acic Ra. and aldeh~d8 sand ketores increased during storage
perio~. Also eugenol content increased during storage period
excep t :::Or tle ...!ast 7r{J ,
oays. Ester No. and total alcohols
dedreased during storage especislly during the first 60 days