Fresh leaf samples of C. salignus were collected on the campus of University of Zululand, KwaDlangezwa and Empangeni (Both in KwaZulu-Natal Province) , South Africa.

1,8-Cineole (63.4%), alpha-pinene (17.8%) and E-(beta)-ocimene (6.7%) were the major constituents identified in the KwaDlangezwa sample (Sample A). The Empangeni sample (Sample B) contained only 1,8-cineole (85.4%) and alpha-pinene (6.2%) as the main compounds present in the oil.

Fruits of coriander of commercial crops from Viamonte (Province of Cordoba), Argentina were compared with three Russian oils imported by the Argentinian fragrance and flavor industry.

Twenty components were identified which accounted for 96.6-99-7% of the total oils composition. The main constituents were linalool (68.9-83-7%), gamma-terpinene (2,2-5.1%), camphor (3.2-4.8%), alpha-pinene (1.0-6.5%), geraniol (1.4-3.2%) and geranyl acetate (0.8-3.8%). The contents of cis- and trans-linalool oxide (0.1-0.4%) were low.

The aerial parts of D. assadii Alava. were collected in the wild from Lalehzar (Kerman Province, in southern Iran) at the flowering stage, in July 2007. The material was dried at room temperature and used for distillation. Distillation: A direct-fired field distillation unit containing a distillation tank (capacity: 1,000 L), a condensation column and receiver, all made of stainless steel, and which can process 30-50 kg of dried aerial parts from the plants/batch, was installed at an altitude of 2600 m (boiling point: 87 ℃). Dried aerial parts from the plants (40 kg) were charged into the distillation unit along with 500 L fresh water and the unit was heated by steam. The system was kept open to atmospheric pressure until the temperature reached to 70 ℃, when the air present in the unit was replaced by the vapor. After complete removal of air from the unit, the air vent was closed and the whole unit was operated as a closed system under pressure to distill the oil. The pressure, temperature and rate of distillation were controlled manually. The process was completed after the collection of 500 L of water distillate. The oil collected in the receiver and dried over anhydrous Na₂SO₄. Extraction of Ducrosia Second Oil From Ducrosia Water by Redistillation: The seprated distillate water collected in the receiver was redistilled in a 1,000 L still to yield more Doucrosia oil (this oil is known as secondary essential oil, second oil, cooked oil or indirect oil).

Fifty components were identified in a second oil of D. assadii from Lalehzar with decanal (35.2%), nonadecane (12%) and citronellyl acetate (11.6%) as the main constituents. The oil from Dehbakrii also contained decanal (36.4%) as the main component of an oil recovered from the distillate water. The results showed that the amount of decanal is remarkably high in the oils of D. assadii.

Whole leaves and inflorescences of two wild strawberry cultivars ('Rugia' and 'Baron von Solemacher') harvested in 2008 during the agrotechnical experiment performed by Department of Vegetable and Medicinal Plants, University of Life Sciences in Lublin, were used as a material for determinations. Samples were collected before noon at sunny and dry days at the beginning of wild strawberry's flowering stage. Material was dried up to 35 ℃ in shadow and air just after the harvest.

Depending on a cultivar, air-dry inflorescences from wild strawberry contain from 0.21% ('Baron von Solemacher' cv.) to 0.30% ('Rugia' cv.), whereas leaves contains from 0.46% ('Baron von Solemacher' cv.) to 0.62% ('Rugia' cv.) of essential oils. GC/MS analysis of essential oils achieved from studied materials revealed presence of 70 (including 59 identified) compounds in leaves of 'Rugia' cv. and 58 (including 50 identified) compounds in leaves of 'Baron von Solemacher' cv. Essential oils from inflorescences of 'Rugia' cv. contained 52 (including 47 identified), while 'Baron von Solemacher' cv. contained 54 (including 46 identified) compounds. The chromatographic analyses by GC-MS revealed that myrthenol, nonal, linalool and phthalide dibuthyl dominated in essential oils obtained from leaves, while myrthenol, citronelol, linalool and geraniol - from those of inflorescences. There were qualitative differences between oil components at both studied materials and differentiation between both cultivars, as well.

Plant material: Samples of L. latifolia were collected in August 1998 during the full flowering period (L/La) and in October 1998 during the fruiting period (L/Lb) from three different spike lavender populations located into the Cazorla, Segura y Las Villas Natural Park (Jaen province, Spain). The plant material from each population consisted of the twigs of several single plants. L/La (Location: 'Garganta de Hornos', Altitude (m): 950, Harvesting date: August 14, 1998, Phenological stage: Flowering); L/Lb (Location: 'Garganta de Hornos', Altitude (m): 950, Harvesting date: October 15, 1998, Phenological stage: Fruiting).

The small amounts of linalool needed to match the standard can be reached in a natural way (from full flowering to fruiting) which means it is important to choose the most convenient time of harvest in the studied area.

One hundred grams of mature leaves were collected from 2 to 10 widely spaced trees per site and sent to Sydney for analysis as soon as possible after collection. Samples usually arrived in the laboratory within 48 h of collection. The majority of the sampling was done between December 1998 and October 1999. Seasonal trends in oil yields and composition are confounded in the data on geographic variation, but these were considered minor in the context of this study.

Chemotype 1 is comprised of E-nerolidol (74-95%) and linalool (14-30%) and is found from Sydney, north along the east coast of Australia to Selection Flat, New South Wales, with an isolated occurrence near Maryborough, Queensland. Two divisions occur in this chemotype which are based on the presence or absence of significant proportions of linalool (14-40%). Chemotype 2 contains 1,8-cineole (10-75%), viridiflorol (13-66%), alpha-terpineol (0.5-14%) and beta-caryophyllene (0.5-28%) in varying proportions and order of dominance in the oils. It is found throughout the distribution of the species, from Sydney to Papua New Guinea and New Caledonia. Within chemotype 2 there appears to be a continuous spread of oil composition without formation of any further discrete divisions as in chemotype 1. Analyses have shown that M. quinquenervia trees that occur at latitudes south of 25d S have high oil yields (1-3% w/w%, fresh leaves) and comprise chemotypes 1 and 2. North of 25d S, however, chemotype 1 does not occur and oil yields amongst the Australian populations are uniformly low (0.1-0.2%).

Plant material: Leaves of M. spicata plants were collected from a wild population of Mt. Pangeon (alt. 600 m, 40° 55′ N/ 24° 12′ E). Collections were conducted every month during the growing period (April to October).

The oil content ranged from 0.1-1.8%, with the maximum values in late summer/early autumn. The essential oil obtained from the leaves was characterized by a very high content in linalool, i.e. 85.0-93.9% of the total oil (highest percentage in mid-autumn). Other oil constituents occurring in much lower amounts were germacrene D (up to 4.2%), beta-caryophyllene (up to 2.6%) and 1,8-cineole (up to 2.1%).

Myrtle (M. communis var. italica) aerial parts were collected monthly during 2006-2007 from Jbal Stara of Haouaria region in North Tunisia, belonging to a subhumid bioclimate.

In conclusion, high fluctuations were observed in the oil yields and composition of different parts of Myrtus communis var. italica during all the collecting periods. They could be explained by genetic and environmental factors. Moreover, significant differences were revealed in the main oil compounds. alpha-Pinene percentages showed the most remarkable changes among the different part oils. So, leaf oils contained more alpha-pinene than those of the fruits and stems during the myrtle vegetative cycle.

One-month-old rooted stem cuttings of three rosescented geranium cultivars, namely Bourbon type, CIM-Pawan and Kelkar were transplanted at 50 × 50 cm plant spacing in the experimental field of Central Institute of Medicinal and Aromatic Plants, Research Center Purara, Uttarakhand, in October 2007. Plants were irrigated immediately after transplanting and further crops were raised following the normal agricultural practices needed to grow the plant. The experimental site is located between the coordinates 28° 60′ and 31° 29′ N, 77° 49′ and 80° 60 m E, and at an altitude of 1250 m in the Kattyur valley. Climatologically, it is categorized as a sub-temperate (1200-1700 m) zone, where monsoon usually breaks in June and continues up to September. Sampling of the rose-scented geranium cultivars was started from March 2008 and taken on the tenth of every month until February 2009. Samples were collected in triplicate in each season. (A, cv. Bourbon type; B, cv. CIM-Pawan; C, cv. Kelkar; I, spring season; II, summer season; III, rainy season;IV, autumn season; V, winter season).

The major components in the essential oil of cv. Bourbon type were geraniol (14.1-34.6%), citronellol (15.2-31.3%), linalool (2.9-9.2%), citronellyl formate (4.4-9.2%), isomenthone (4.5-6.6%), 10-epi-gamma-eudesmol (4.7-6.7%) and geranyl formate (3.8-6.2%). The dominant constituents of the cv. CIM-Pawan essential oil were geraniol (11.9-31.9%), citronellol (16.1-30.2%), citronellyl formate (5.2-8.9%), linalool (3.7-6.4%), isomenthone (4.0-6.3%), 10-epi-gamma-eudesmol (4.4-5.2%) and geranyl formate (4.3-5.0%). However, the chemical composition and odor of cv. Kelkar was quite different from the other two cultivars and the major components found in this oil were citronellol (51.0-63.4%) and isomenthone (9.8-17.8%).

Aerial parts of both varieties(Salvia euphratica Montbret et Aucher ex Benth. var. euphratica and Salvia euphratica Montbret et Aucher ex Benth. var. leiocalycina) were collected in Malatya, Turkey in June 1999.

Ninety-five compounds in var. euphratica and 94 compounds in var. leiocalycina were characterized representing 93% and 95% of the total components detected, respectively, with 1,8-cineole (13.8% and 15.2%) and myrtenyl acetate (15.9% and 13.9%) as main constituents.

Talauma ovata was collected from October 2003 to February 2005. Leaves and trunk bark from the same set of plants were collected in the four seasons: spring (October 15th, 2003), autumn (April 10th, 2004), winter (July 17th, 2004) and summer (February 15th, 2005). In addition, trunk bark was also collected on January 22nd, 2004 (summer). The plant material was harvested from wild-growing population in Santos Dumont City, Minas Gerais State, Brazil, (21° 28′ 03″ S, 43° 39′ 26″ W), at 1000 m of altitude.

In each season the composition of trunk bark oils was similar to leaf oils, with mainly quantitative differences. However considerable seasonal variation was observed. Significant levels of monoterpenes were found only in autumn. The content of oxygenated sesquiterpenes was highest in samples of spring (October) and decreased in summer (January and February), reaching the lowest level in autumn (April) and increasing again in winter (July). In trunk bark oils the main constituents were: spathulenol, alpha-eudesmol, linalool, trans-beta-guaiene and caryophyllene oxide. The major component in all samples of trunk bark was spathulenol. Its level was highest in October (46.8%), decreased in January (33.3%), remained stable in April and July (18.0%) and increased again in February of next year (27.7%). Levels of alpha-eudesmol were high in spring (13.0%) and autumn (11.5%). Linalool peaked only in April, while trans-beta-guaiane peaked in July (11.1%). Caryophyllene oxide ranged between 10.7-2.0%. The level was highest in January, decreased regularly until July and increased slightly again in October. In leaf oils the main components were: spathulenol, germacrene B, germacrene D, caryophyllene oxide and viridiflorol. Spathulenol was the major component in sample of spring (34.4%), but decreased gradually until winter, when reached the lowest level (9.4%). Caryophyllene oxide showed a similar pattern, varying from 14.1% (spring) to 2.4% (winter). An inverse effect was observed for viridiflorol, which increased from 0.1% in October to 13.7% in July. Important levels of alpha-eudesmol were observed in October (12.3%) and February (9.5%). The percentage of germacrene D was highest in summer, while germacrene B showed high amounts in autumn and winter. The seasonal changes in oil composition of T. ovata can be associated with cycle of life of plant (flowering, fruiting and vegetative stages) and climatic parameters such as intense raining in the spring and summer.

Plant materials were collected during the flowering period in July 2002 from the Dumluca Mountain in the vicinity of Divrigi village of Sivas city at 1900 m altitude and Saksagan Gorge in Saimbeyli village of Adana city at 1900 m altitude.

The flower, stem and root oils of T. cadmeum ssp. orientale collected from the Adana location were characterized with alpha-thujone (25%, 5.2%), cis-linalool oxide (6.8%, 12.8%), trans-chrysanthenyl acetate (5.8%, 8.5%) for flower and stem oils, and beta-eudesmol (10.3%, 6.2%, 13.8%); in addition, stem oil contained 1,8-cineole (6.6%) and root oil contained hexadecanoic acid (6.0%), spathulenol (5.8%) and beta-muurolol (5.3%). The flower and stem oils of T. cadmeum ssp. orientale collected from the Sivas location were characterized with camphor (25.9%, 14.8%), borneol (15.4%, 25.8%) and alpha-thujone (7.8%, 5.5%); in addition, stem oil contained 1,8-cineole (7.4%) and root oil contained nonacosane (16.2%), spathulenol (6.8%) and hexadecanoic acid (5.8%).

Herbal parts were collected from A = Eskisehir: Suluagac village in Turkey, altitude 1100 m, in July 1990 and B = Corum: Osmancik, Berk village in Turkey, altitude 580-600 m, on 22 June 1993.

One chemotype (Suluagac village, Eskisehir, Turkey) contained carvacrol (21.59%), p-cymene (17.80%) and thymol (14.10%); and the other chemotype (Berk village, Corum, Turkey) contained alpha-terpinyl acetate (23.80%), borneol (12.85%), linalool (13.67%) and thymol (11.31%) as major constituents.

One-month-old rooted stem cuttings of three rosescented geranium cultivars, namely Bourbon type, CIM-Pawan and Kelkar were transplanted at 50 × 50 cm plant spacing in the experimental field of Central Institute of Medicinal and Aromatic Plants, Research Center Purara, Uttarakhand, in October 2007. Plants were irrigated immediately after transplanting and further crops were raised following the normal agricultural practices needed to grow the plant. The experimental site is located between the coordinates 28° 60′ and 31° 29′ N, 77° 49′ and 80° 60 m E, and at an altitude of 1250 m in the Kattyur valley. Climatologically, it is categorized as a sub-temperate (1200-1700 m) zone, where monsoon usually breaks in June and continues up to September. Sampling of the rose-scented geranium cultivars was started from March 2008 and taken on the tenth of every month until February 2009. Samples were collected in triplicate in each season. (A, cv. Bourbon type; B, cv. CIM-Pawan; C, cv. Kelkar; I, spring season; II, summer season; III, rainy season;IV, autumn season; V, winter season).

The major components in the essential oil of cv. Bourbon type were geraniol (14.1-34.6%), citronellol (15.2-31.3%), linalool (2.9-9.2%), citronellyl formate (4.4-9.2%), isomenthone (4.5-6.6%), 10-epi-gamma-eudesmol (4.7-6.7%) and geranyl formate (3.8-6.2%). The dominant constituents of the cv. CIM-Pawan essential oil were geraniol (11.9-31.9%), citronellol (16.1-30.2%), citronellyl formate (5.2-8.9%), linalool (3.7-6.4%), isomenthone (4.0-6.3%), 10-epi-gamma-eudesmol (4.4-5.2%) and geranyl formate (4.3-5.0%). However, the chemical composition and odor of cv. Kelkar was quite different from the other two cultivars and the major components found in this oil were citronellol (51.0-63.4%) and isomenthone (9.8-17.8%).

Grape pomaces and stalks of Nero d'Avola and Frappato were donated by the ''Valle dell'Acate'' wine firm, Acate, RG, Italy - those from Nerello Mascalese and Cabernet Sauvignon were given by the ''Emanuele Scammacca Barone del Murgo'' wine firm, Santa Venerina, CT, Italy. The winemaking procedures were similar for all samples, namely grape clusters were crushed and destemmed using a destemmer-crusher. The crushed grapes were treated with sulphur dioxide (0.2-0.5% total mash) and with selected strains of Saccharomyces cerevisiae to start up the fermentation. After 6-8 days of maceration, when alcoholic fermentation was finished, the mash was pressed. Stalks coming from destemming procedure and grape pomace coming from the maceration procedure were subjected to the distillation procedures within 24 h of their collection. All materials were collected during the 2004 vintage.

On the whole, 38 components have been characterized in the samples of grape pomaces, with Frappato cv. showing the richest composition; instead, 88 components have been detected in the stalks of Frappato, Nero d'Avola, Nerello Mascalese and Cabernet Sauvignon varieties.