bluuebunny/crossref_metadata_2025_split huggingface dataset:
The leaf essential oil of two chemotypes of Backhousia anisata vickery
Authors: Brophy Joseph J. , Boland Douglas J. 
Published: November 2006

AbstractBackhousia anisata Vickery has been found to occur in two chemotypes. One chemotype contains E‐anethole (90+ %) as its major component with small amount of methyl chavicol (< 5%) and very littleZ‐anethole( < 0.1 %). The second chemotype contains methyl chavicol (60‐75%) as its major compound with smaller amounts of E‐anethole (< 25%) and Z‐anethole (<0.1%). In both cases the oil yield was 1‐1.5% based on fresh leaves.
Glycosidically bound aroma compounds from two strawberry fruit species, Fragaria vesca f. semperflorens and Fragaria X ananassa, cv. Korona
Authors: Wintoch Herbert , Krammer Gerhard , Schreier Peter 
Published: November 2006

AbstractCapillary gas chromatographic (HRGC) and on‐line coupled HRGC‐mass spectrometrical (HRGC‐MS) identifications of bound aroma compounds from wild (Fragaria vesca f. semperflorens) and cultivated (Fragaria X ananassa, cv. Korona) strawberry fruit were achieved after isolation of extracts obtained by Amberlite XAD‐2 adsorption and methanol elution followed by hydrolysis with a commercial pectinase enzyme. In F. vesca f. semperflorens 37 and F. X ananassa 33 aglycons were identified. Among them (S)‐2‐methylbutanoic acid, benzyl alcohol, 2,5‐dimethyl‐4‐hydroxy‐2H‐furan‐3‐one, benzoic acid and E‐cinnamic acid were found as major components. After per‐O‐methylation of a glycosidic extract isolated from F. X ananassa, HRGC‐MS revealed the occurrence of benzyl β‐D‐glucopyranoside, 2‐(4‐hydroxyphenyl)ethyl β‐D‐glucopyranoside, and the diastereomeric 2,5‐dimethyl‐4‐hydroxy‐2H‐furan‐3‐one β‐D‐glucopyranosides. Chiral evaluation of enzymatically liberated 2,5‐dimethyl‐4‐hydroxy‐2H‐furan‐3‐one carried out by on‐line multidimensional capillary gas chromatography‐mass spectrometry (MDGC‐MS) revealed the presence of a racemic mixture.
Essential oils of Kenyan Lippia species. Part III
Authors: Mwangi J. W. , Addae‐Mensah I. , Munavu R. M. , Lwande W. 
Published: November 2006

AbstractEssential oils from six Lippia species (fam. Verbenaceae), namely Lippia javanica (Burm f.) Spreng., L. dauensis (Chiov.) Chiov., L. carviodora Meikle, L. carviodora var. minor Meikle, L. grandifolia Mart & Schau., and L. wilmsii H. H. W. Pearson, have been analysed by GC and GO‐MS. Myrcenone, cis‐ and trans‐ ocimenone have been found to be the major constituents of essential oil of L. Javanica. β‐Ocimene, cis‐tagetone and 2‐methyl‐6‐methylene oct‐7‐en‐4‐one are major compounds of L. dauensis oil. L. carviodora var. minor oil consists primarily of sesquiterpene hydrocarbons, β‐cubenene being the major constituent.
Composition of the essential oils from roots of some apiaceae in relation to the development of their oil duct systems
Authors: Stahl‐Biskup E. , Wichtmann E.‐M. 
Published: November 2006

AbstractIn the roots of Apiaceae seedlings, the essential oils are accumulated in triangular primary oil ducts between the pericycle cells. In a later stage, when the roots are increasing in diameter, secondary oil ducts continually develop in the cortex near the cambium, thereafter moving outwards. In different stages of development after germination, the composition of the essential oils from the roots of caraway, Carum carvi L., fennel, Foeniculum vulgare ssp. capillaceum Gilib, var. azoricum (Mill.) Thell., parsnip, Pastinaca sativa L. ssp. sativa L. var. hortensis Ehrh., and lovage, Levisticum officinale Koch was analysed parallel to microscopical observation of the roots.Compared with the ‘adult’ oils, the essential oils of the seedlings consist of large amounts of sesquiterpene hydrocarbons, and only small changes occur until the beginning of the secondary thickening. At that time, the changes in the oil composition start, although the secondary oil ducts have not yet developed. Just when the secondary oil ducts appear, the oil content in the roots increases remarkably, accompanied by rapid changes in the oil composition into that of the ‘adult’ oils.Only L. officinale did not fit into this pattern. The phthalides, characteristic compounds of the adult oils of this species, are found in considerable amounts only after many complete secondary oil ducts have been developed.
Additional volatile constituents of Artemisia vulgaris l. herb
Authors: Wörner Martin , Pflaum Michael , Schreier Peter 
Published: November 2006

AbstractThe extract obtained by solid‐liquid extraction with pentane‐dichloromethane (2+1, v/v) from dry mugwort (Artemisià vulgaris L.) herb was fractionated by means of gel permeation chromatography (GPC) and subsequent middle‐pressure liquid chromatography (MPLC). Capillary gas chromatography (HRGC) and combined HRGC techniques, i.e. HRGC‐mass spectrometry (HRGC‐MS) and HRGC‐Fourier transform infrared spectroscopy (HRGC‐FTIR) of the separated MPLC fractions revealed the occurrence of 54 additional volatiles not described as yet in A. vulgaris herb. Among them, chiral evaluation of y‐nonalactone carried out by on‐line coupled multidimensional gas chromatography‐mass spectrometry (MDGC‐MS) revealed a distribution of (R): (S) = 34:66%.
Steam volatile leaf oils of some Western Australian Eucalyptus species
Authors: Brophy Joseph J. , Lassak Erich V. 
Published: November 2006

AbstractThe volatile leaf oils of Eucalyptus calycogona Turcz., E. celastroides Turcz. ssp. celastroides, E. clelandii (Maiden) Maiden, E. grossa F. Muell. ex. Benth., E. salubris F. Muell. var. salubris, E. salubris var. glauca Maiden, E. stricklandii Maiden, E. tetragona (R.Br.) F. Muell. and E. woodwardii Maiden, isolated by stream distillation, were analysed by GC‐MS. In addition to the usual monoterpenoids and sesquiterpenoids, substantial amounts of the phenolic ketone torquatone were also present in some of the oils.
Volatile components of plumeria flowers. part 1. Plumeria rubra forma Acutifolia (poir.) woodson cv. ‘common yellow’
Authors: Omata Akihiki , Yomogida Katsuyuki , Nakamura Shoji , Hashimoto Seiji , Arai Toshiyuki , Furukawa Kiyoshi 
Published: November 2006

AbstractThe essential oil of Plumeria rubra forma acutifolia (Poir.) Woodson cv. ‘Common Yellow’ growing in Hawaii was extracted by simultaneous distillation and extraction (SDE). The essential oil was analysed with GC and GC‐MS, and a total of 74 compounds were identified. Linalol, phenylacetaldehyde, trans,trans‐farnesol, β‐phenylethyl alcohol, geraniol, α‐terpineol, neral and geranial were found to make a major contribution to the floral scent of this flower.
Structure‐odour correlation, part XV1: Macrocyclic spiro ethers
Authors: Weyerstahl Peter , Brendel Joachim , Glasow Lutz 
Published: November 2006

AbstractFrom cyclooctanone (1) and cyclododecanone (2) the spiro ethers 18–23 were prepared via the yne‐diols 6–11 and the ene‐diols 12–17. Hydrogenation of 21–23 leads to the spiro tetrahydrofurans 24–26.Olfactive evaluation showed that the odour of 18 (camphor, fresh, green) is very similar to that of the unsubstituted analogue B (R1, R2 = H). This can be explained by a similar steric situation of the osmophoric dihydrofuran ring in both these compounds. Increasing substitution at C‐2 (18 → 19 → 20) diminishes the camphoraceous sensation stepwise with increasing herbaceous notes. The macrocyclic spiro ethers 21–23 exhibit interesting woody fragrances with different undertones. Particularly, 22 is most pleasant with some powdery, balsamic and musk notes. The saturated spiro ethers 24–26 smell similar but very weak.
Bound vanillin in maple sap
Authors: Belford A. L. , Lindsay R. C. , Ridley S. C. 
Published: November 2006

AbstractAnalysis of acid and enzymic hydrolysates of maple (Acer saccharum Marshall) sap and syrup confirmed the presence of vanillin glucoside as a precursor of vanillin in maple syrup. Vanillin glycoside was present at a concentration of about 5 ppm in vacuum‐concentrated maple syrup. About 20% of the bound vanillin in vacuum concentrated maple syrup was released by either β‐glucosidase or hesperidinase during extended incubations (> 14 h at 40°C). Small variations in vanillin glycoside concentrations were associated with size of tree and harvest time during the season.
On the genuineness of citrus essential oils. Part XXXIV. Detection of added reconstituted bergamot oil in genuine bergamot essential oil by high resolution gas chromatography with chiral capillary columns
Authors: Cotroneo Antonella , Stagno d'Alcontres Ildefonsa , Trozzi Alessandra 
Published: November 2006

AbstractA rapid method for the detection of the addition of reconstituted bergamot oils to natural bergamot essential oils is suggested. The method is based on the ratio of the two enantiomers of linalol determined by gas chromatography with chiral capillary columns.
Analysis of the Essential Oils of Five Curcuma Species
Authors: Zwaving J. H. , Bos R. 
Published: November 2006

AbstractThe chemical composition of the essential oils from the rhizomes of five Curcuma species from Indonesia and India was examined by GC‐MS. The oils can be characterized by the following compounds: C. xanthorrhiza Roxb.: ar‐curcumene (41.4%), xanthorrhizol (21.5%); C. domestica Val.: ar‐turmerone (24.7%), turmerone (29.5%), turmerol (20.0%), α‐atlantone (2.4%); C. aromatica Salisb.: ar‐curcumene (18.6%), β‐curcumene (25.5%), xanthorrhizol (25.7%); C. aeruginosa Roxb.: isocurcumenol (8.5%), β‐eudesmol (6.5%), curdione (3.6%), curcumenol (9.9%), curcumanolides A,B (11.4%), dehydrocurdione (9.4%), curcumenone (1.9%); C. heyneana Val.: 1,8‐cineole/limonene (14.2%), isocurcumenol (7.4%), β‐eudesmol (4.7%), curcumanolides A,B (13.1%), dehydrocurdione (10.2%), curcumenone (2.3%).
Isobutane and ammonia chemical ionization mass spectrometry of sesquiterpene hydrocarbons
Authors: Schultze W. , Lange G. , Schmaus G. 
Published: November 2006

AbstractThe mass spectral reactions of sesquiterpene hydrocarbons under the conditions of chemical ionization (CI) using isobutane and ammonia, respectively, as the reagent gases are investigated. With isobutane intense quasimolecular ions [M + 1]+ are obtained. The molecular weight can be deduced unequivocally. The extent of fragmentation is different for the various compounds, permitting a certain structural classification within this group. Sesquiterpene alcohols and esters may yield similar spectra with isobutane impeding unequivocal classification of this compound class. With ammonia a typical set of ions [M + 1]+, [M + 18]+ and [M + 35]+, respectively, is produced. According to their specific mass numbers these ions unambiguously characterize the class of the hydrocarbons. The molecular mass is obtained from the species [M + 1]+ and/or [M + 18+].
A study of the variability of Rosemary and Sage and their volatile oils on the British market: Their antioxidative properties
Authors: Svoboda Katerina P. , Deans S. G. 
Published: November 2006

AbstractRosemary and sage samples, both of dried herbs and essential oil, were obtained from various dealers and suppliers of the British market. Both species were also cultivated in Scotland for comparison of the oil characteristics. Dried samples were hydrodistilled, and all samples were analysed using GC. Herbal material was also examined under the light microscope for purity and cleanliness. There were considerable variations between the samples and the resulting problems are discussed. Scottish‐grown material was of very good quality compared with the imported samples. The antioxidative properties of the various rosemary and sage samples were determined and found to be variable based on geographical location and type of processing. There is a real need for natural antioxidants at a time when the synthetic moieties currently in use are receiving considerable attention with respect to their safety and acceptability.
Aroma components of yeast extracts
Authors: Ames Jennifer M. , Elmore J. Stephen 
Published: November 2006

AbstractAroma components of 3 commercial yeast extracts with different aroma properties were analysed. In total, 182 positive identifications were made and a further 86 components were partially characterised. Two hundred and one components, including 47 sulphur‐containing compounds, are reported here for the first time as aroma components of commercial yeast extracts, and include 120 positive identifications. Most of the aroma components are likely to arise from sugar and/or amino acid interactions, or thiamin degradation. While certain similarities between the composition of the aroma of the 3 samples were apparent, important differences also existed, reflecting variations in the conditions used to manufacture the yeast extracts.
Hydroborations of some monoterpenes and sesquiterpenes from essentials oils
Authors: Chalchat J. C. , Ph. Garry R. , Michet A. , Lecomte E. 
Published: November 2006

AbstractHydroboration was carried out on terpinolene, myrcene, α‐ and β‐cedrene, α‐ and β‐caryophyllene and caryophyllene oxide. Some of the corresponding terpenic alcohols were isolated and characterized. These are potentially of interest as fragrances in perfumery.
Antimicrobial and antioxidative properties of the volatile (essential) oil of Artemisia afra Jacq
Authors: Graven E. H. , Dean S. G. , Svoboda K. P. , Mavi S. , Gundidza M. G. 
Published: November 2006

AbstractSteam‐distilled volatile oil from Artemisia afra Jacq. (family Compositae), indigenous to the mountainous regions in southern Africa and used in popular medicine, was analysed by gas chromatography and tested for antimicrobial and antioxidative properties. The main components of the volatile oil were α‐ and β‐thujone (52%), 1,8‐cineole (13%), camphor (15%) and α‐pinene (2%). Twenty‐five bacterial species and three filamentous fungi were used to assess the antimicrobial properties. Fifteen test bacteria and one fungus showed high degree of inhibition of growth caused by the volatile oil. The most susceptible organisms were Acinetobacter calcoaceticus, Beneckea natriegens, Brevibacterium linens, Brochothrix thermosphacta, Citrobacter freundii, Klebsiella pneumoniae and Serratia marcescens. The oil exerted considerable antioxidative effect.
Coumarins and psoralens from sicilian lemon oil (Citrus limon (L.) Burm. f.)
Authors: Ziegler Herta , Spiteller Gerhard 
Published: November 2006

AbstractThe coumarin fraction of cold‐pressed Sicilian lemon oils (Citrus limon (L.) Burm. f.) was investigated by HPLC, MS, GC‐MS and NMR. Twenty‐nine structurally different compounds were identified. Eleven of these were previously unknown as constituents of lemon oil. 5‐(2′,3′‐Dihydroxy‐3′‐methylbutyloxy)‐7‐methoxycoumarin, 5‐(2′,3′‐epoxy‐3′‐methylbutyloxy)‐7‐methoxycoumarin, 8‐(7′,8′‐epoxygeranyloxy)psoralen as well as 5‐(3′‐methylbut‐2′‐enyloxy)‐8‐(2′,3′‐dihydroxy‐3′‐methylbutyloxy)psoralen are hitherto unknown natural products. Moreover, a new derivatization method for the investigation of allyloxycoumarins, based on mild hydrogenation, is presented.
a coumarin and a diterpene from Citrus sinensis (L.) Osbeck cv. Valencia (rutaceae)
Authors: Ziegler Günter , Spiteller Gerhard 
Published: November 2006

AbstractOsthole 1, 7‐methoxy‐8‐(3‐methylbut‐2‐enyl) coumarin, and gomerol 2 were detected as trace constituents in the non‐volatile fraction of cold‐pressed peel oil obtained from Citrus sinensis (L.) Osbeck cv. Valencia. Neither the coumarin nor the diterpene was previously known as a constituent of sweet orange oil. Gomerol was synthesized from manool 3 to confirm its structure.
Glycosidically bound volatiles of clove Syzygium aromaticum (L.) merr. et perry (Myrtaceae)
Authors: Menon A. Nirmala , Narayanan C. S. 
Published: November 2006

AbstractBound volatiles of dried clove buds and fresh green clove leaves were studied by Svendsen's method, using both β‐glucosidase and α‐amyloglucosidase for enzyme hydrolysis. Apart from aliphatic alcohols and monoterpene alcohols, eugenol, isoeugenol, farnesol and nerolidol were identified as aglycones.
GC and NMR enantiodiscrimination of 2‐methyl substituted aliphatic acids via diastereomeric esterification with (R)‐pantolactone
Authors: Barbeni Massimo , Allegrone Gianna , Cisero Marco , Guarda Pier Antonio 
Published: November 2006

AbstractThe chiral differentiation of the enantiomers of 2‐methylbutanoic acid, 2‐methylpentanoic acid and 2‐methylhexanoic acid was achieved by diastereomeric derivatization with (R)‐( – )‐pantolactone. GC separation on achiral DB‐1, DB‐1701 and DB‐WAX capillary columns as well as 1H‐ and 13C‐NMR enantiodiscrimination were obtained, affording good resolution and quantitative evaluation of enantiomer composition. The method applied to 2‐methylbutanoic acid present in the aromatic fraction extracted from cultivated strawberry (Fragaria vesca) indicated a high enantiomeric excess of the (S)‐isomer.
Chiral gc analysis of enantiomerically pure fenchone in essential oils
Authors: Ravid Uzi , Putievsky Eli , Katzir Irena , Ikan Raphael 
Published: November 2006

AbstractEnantiomerically pure ( + )‐fenchone was detected in the essential oils of wild, bitter and sweet fennel plants and seeds. Enantiomerically pure ( ‐ )‐fenchone was detected in the oils of wormwood, tansy and cedarleaf. Determination of the enantiomeric purity of fenchone in laboratory‐made essential oils and in essential oils and samples of fenchone from commercial sources, was performed by direct capillary gas chromatography on a LipodexR E column.
Scent of roses–recent results
Authors: Brunke Ernst‐Joachim , Hammerschmidt Franz‐Josef , Schmaus Gerhard 
Published: November 2006

AbstractThe volatiles of four roses with different fragrance types were sampled by dynamic headspace and analysed by GC and GC‐MS. The composition of the headspace of the modern English rose ‘Othello’ is comparable to that of rose oil obtained from Rosa damascena Mill. In contrast ‘Duchesse de Montebello’ (Rosa alba type) contains high concentrations of β‐phenylethyl alcohol and β‐phenylethyl acetate. ‘Lichtkönigin Lucia’, a modern hybrid rose, is characterized by considerable amounts of green notes. The Floribunda grandiflora rose ‘Queen Elizabeth’ shows a completely different pattern with 3,5‐dimethoxytoluene, the theaspiranes and ionone derivatives as the main components.
Stereoisomeric flavour compounds. Part LVII: The stereoisomers of 3‐Oxo‐p‐menthane‐8‐thiol acetate, simultaneously stereoanalysed with their corresponding thiols
Authors: Köpke Thomas , Schmarr Hans‐Georg , Mosandl Armin 
Published: November 2006

AbstractThe stereoisomers of 3‐oxo‐p‐menthane‐8‐thiol acetate have been synthesized by acetylation of optically pure stereoisomers of 8‐mercapto‐p‐menthan‐3‐one. The stereoisomers were identified by 1H/13C‐NMR spectroscopy and CGC‐MS. Their sensory properties are described. Their chirospecific analysis is reported simultaneously with the stereoisomers of their corresponding thiols using selectivity adjusted enantioselective capillary gas chromatography with octakis(2,3‐di‐O‐acetyl‐6‐O‐tert‐butyldimethylsilyl)‐γ‐cyclodextrin as the chiral stationary phase.
Composition of the Essential Oils from Leaves and Flowers of Achillea millefolium L. ssp. millefolium
Authors: Figueiredo A. Cristina , Barroso José G. , Pais M. Salomé S. , Scheffer Johannes J. C. 
Published: November 2006

AbstractThe composition of the essential oils from leaves and from flowers of Achillea millefolium L. ssp. millefolium was analysed by GC and GC‐MS. During the flowering period of the plant, both oils consisted mainly of monoterpenes (about 80%). 1,8‐Cineole was the dominant component in the oils from the flowers (29%) and from the leaves (25%), while sabinene was the second most important component in the oil from the flowers (15%) and trans‐sabinene hydrate in that from the leaves (10%). The sesquiterpene fraction was in both cases dominated by germacrene‐D (0.7% in the oil of the flowers and 7% in the leaf oil).In the essential oil isolated from leaves collected during the vegetative phase, the monoterpene fraction was small (<3%), whereas sesquiterpenes amounted to 92%, germacrene‐D being the major component (65%) of the oil.
Production of 6‐pentyl‐α‐pyrone by Trichoderma viride
Authors: Prapulla S. G. , Karanth N. G. , Engel K. H. , Tressl R. 
Published: November 2006

AbstractFermentative production of 6‐pentyl‐α‐pyrone, a lactone with a characteristic coconut aroma, by Trichoderma viride is described. The concentration of 6‐pentyl‐α‐pyrone reached a maximum of 90–110 ppm after 120 h of fermentation when it showed an inhibitory effect causing no further production of the α‐pyrone. The use of Amberlite XAD‐2 for alleviating the end‐product inhibition has been investigated. It has been shown that addition of Amberlite XAD‐2 at the start of the fermentation effectively overcomes product inhibition and leads to a marked increase in the yield of 6‐pentyl‐α‐pyrone.
Constituents of the leaf extract of Amomyrtus meli (R. A. Philippi) legrand et kausel, Amomyrtus luma (molina) legrand et kausel and of Amomyrtella guili (Speg.) Kausel
Authors: Weyerstahl Peter , Marschall Helga , Landrum Leslie R. 
Published: November 2006

AbstractThe absolute from the leaves of Amomyrtus meli (R. A. Phillippi) Legrand et Kausel (5902/5913) is dominated by 1‐phenylpentan‐3‐one (1, 36/27%) and 1‐phenylhexan‐3‐one (3, 32/53%). The absolute of Amomyrtus luma (Molina) Legrand et Kausel (5903/5920) is more complex, but it contains also 1 (4.6/8.5%) and 3 (3.5/12.3%) as well as β‐caryophyllene oxide (10.7/6.6%) and linalol (5903:11.3%). The principal constituents of the absolute of Amomyrtella guili (Speg.) Kausel are methyl eugenol (48.5%) and (E)‐methyl isoeugenol (6.7%), but 1 (3.1%) and 3 (4.4%) are also present. 1‐Phenylalkan‐3‐ones 1–6 as well as 2‐alkylchromones 7–9 were synthesized and olfactorily evaluated.
Aromatic plants of tropical central africa. Part VII. A comparative study of the volatile constituents of the stem bark of Enantia chlorantha oliv. and Xylopia staudtii engl. & diels from cameroon
Authors: Menut C. , Bessière J. M. , Lamaty G. , Zollo P. H. Amvam , Fékam F. Boyom , Chalchat J. C. , Ph. Garry R. 
Published: November 2006

AbstractHydrodistillation of the stem bark of Enantia chlorantha Oliv. and of Xylopia staudtii Engl. & Diels from Cameroon gave yellowish coloured oils in 0.2% yeild. The composition of the essential oils was determined by mean of capillary gas chromatogrphy and mass spectrometry. The volatile oils from the two species were found to be similar and very complex Oxygenated sesquiterpenes constitute more than 70% of the two samples, among which three epoxides (1,5‐epoxysalvial‐4(14)‐ene, β‐caryophyllene epoxide, humulene epoxide), spathulenol and α‐cadinol are the most prominent.
Compositon of the essential oil of rhizomes of kaempferia galanga L.
Authors: Wong K. C. , Ong K. S. , Lim C. L. 
Published: November 2006

AbstractThe compositon of the essential oil of rhizomes of Kaempferia galanga L. growing in Malaysia has been investigated by capillary GC, GC‐MS and 1H‐NMR. The oil contained 54 components, of which the major constituents were ethyl trans‐p‐methoxycinnamate (51.6%), ethyl cinnamate (16.5%), pentadecane (9.0%), 1,8‐cineole (5.7%), γ‐car‐3‐ene (3.3%) and borneol (2.7%). Terpenoid constituents amounted to 16.4%.
Effects of drying and storage of herbs and spices on the essential oil. Part I. Basil, ocimum basilicum L.
Authors: Baritaux O. , Richard H. , Touche J. , Derbesy M. 
Published: November 2006

AbstractA large sample of fresh basil, Ocimum basilicum L., was dried at 45°C for 12 hours and stored. After three, six and seven months, qualitative and quantitative analyses of the essential oil were performed by steam distillation and GC‐MS. The principal components found in the essential oils were: methylchavicol, eugenol, linalol and 1,8‐cineole: the content of methylchavicol and eugenol decreased drastically after drying and storage, while that of linalol and 1,8 cineole increased over the same period. The losses of total essential oil after drying were 19%, 62% and 66% at three, six and seven months storage respectively. Several types of reaction seemed to take place during drying and storage.