scholarly journals Influence of the Storage of Cistus ladanifer L. Bales from Mechanised Harvesting on the Essential Oil Yield and Qualitative Composition

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2379
Author(s):  
Irene Mediavilla ◽  
María Amparo Blázquez ◽  
Alex Ruiz ◽  
Luis Saúl Esteban
Keyword(s):  
Essential Oil ◽  
Storage Period ◽  
Pilot Scale ◽  
Oil Yield ◽  
Saturated Steam ◽  
Quantitative Composition ◽  
Qualitative Composition ◽  
Cistus Ladanifer ◽  
Native Plant ◽  
Essential Oil Yield

Cistus ladanifer is a Mediterranean native plant from which valuable products, such as essential oil, are obtained. Manual harvesting of the plants in wild shrublands is usual during short periods of time. Their mechanised harvesting could increase the volume of harvested plants and prevent fires, further storage of the plants collected being necessary. The objective of this work is to study the influence of the storage period of mechanically harvested bales on the essential oil yield and qualitative composition. The harvesting trials were carried out with an adapted commercial harvester baler and the storage of the bales was performed indoors during 1–7 days, 15–30 days and 100–120 days. Afterwards, the bales were crushed (30 mm) and distilled in a 30 litre stainless steel still with saturated steam (0.5 bar). The essential oil components were identified by GC-MS and quantified by GC-FID. The storage of mechanically harvested Cistus ladanifer does not decrease the oil yield of steam distillation on a pilot scale. However, it leads to differences in the quantitative composition of the essential oils, decreasing the total monoterpene compounds content and increasing that of oxygenated sesquiterpenes, especially when the biomass is stored for 100–120 days, without affecting its qualitative composition.

scholarly journals Essential Oils from Residual Foliage of Forest Tree and Shrub Species: Yield and Antioxidant Capacity

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3257
Author(s):  
Irene Mediavilla ◽  
Eva Guillamón ◽  
Alex Ruiz ◽  
Luis Saúl Esteban
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Antioxidant Capacity ◽  
Sustainable Management ◽  
Cost Effective ◽  
Forest Tree ◽  
Pilot Scale ◽  
Saturated Steam ◽  
Fresh Biomass ◽  
Essential Oil Yield

Increasing applications and markets for essential oils could bring new opportunities for cost-effective and sustainable management of unused forestry biomass; however, better knowledge of the production and application of such essential oils is necessary. The objective of this work is to contribute to greater knowledge of the essential oil production on a pilot scale from foliage biomass of wild shrubs and tree residues produced in some forestry enhancement operations and to study their antioxidant capacity (ORAC—oxygen radical absorbance capacity). Fresh biomass (twigs) of seven species (E. globulus, E. nitens, P. pinaster, P. sylvestris, R. officinalis, C. ladanifer, and J. communis) was manually collected in Spain in two different periods and was ground at 30 mm and distilled in a 30 L stainless steel still with saturated steam. The essential oil components were identified by GC–MS and quantified by GC–FID, and their antioxidant activity was determined with the ORAC method. Promising results on essential oil yield were obtained with E. globulus, E. nitens, R. officinalis, and J. communis. All essential oils studied exhibited antioxidant capacity by the ORAC assay, particularly that from C. ladanifer. Moreover, oxygenated sesquiterpenes contents, one of the minor components of oils, were significantly correlated with ORAC values.

scholarly journals Effect of drying method and storage conditions on the essential oil yield and composition in Eugenia uniflora L. leaves

2020 ◽  
Vol 14 (2) ◽  
Author(s):  
Ana Lucia Alves De Assis ◽  
Roger Raupp Cipriano ◽  
Francine Lorena Cuquel ◽  
Cícero Deschamps
Keyword(s):  
Essential Oil ◽  
Ambient Temperature ◽  
Storage Period ◽  
Storage Conditions ◽  
Oil Yield ◽  
Gas Chromatography Mass Spectrometry ◽  
Drying Method ◽  
Eugenia Uniflora ◽  
And Storage ◽  
Essential Oil Yield

The essential oil produced by Eugenia uniflora leaves is intensively used by the cosmetic, pharmaceutic and perfumery industries mainly because its antioxidant effect and antimicrobial and antihelmintic ativities. Drying and storage of the aromatic plant leaves can affect the yield and quality of its essential oil. This study aimed to evaluate the effect of drying method and storage conditions on the essential oil yield and composition in Eugenia uniflora leaves. The essential oil were extracted from dried leaves at ambient temperature and at 45°C for six drying periods (0, 6, 24, 48, 72 and 96 hours-h). The essential oil yield was also analysed after 0, 60, 120, and 180 days of storage in three types of packaging. The oil was extracted by hydrodistillation and the composition was determined by gas chromatography-mass spectrometry. Results showed that drying the leaves at ambient temperature and 45°C for 48 and 24 h, respectively, increased the essential oil yield. At 45°C the monoterpene and sesquiterpene compounds increased, with curzerene+viridiflorene identified as the major compounds. Package types did not affect the essential oil yield but the increase of the storage period decreased it.

scholarly journals Identification of VOCs in essential oils extracted using ultrasound- and microwave-assisted methods from sweet cherry flower

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Huimin Zhang ◽  
Hongguang Yan ◽  
Quan Li ◽  
Hui Lin ◽  
Xiaopeng Wen
Keyword(s):  
Essential Oil ◽  
Sweet Cherry ◽  
Dimethyl Sulfide ◽  
Solid Phase ◽  
Oil Yield ◽  
Gas Chromatography Mass Spectrometry ◽  
Process Conditions ◽  
Important Indicator ◽  
Microwave Assisted ◽  
Essential Oil Yield

AbstractThe floral fragrance of plants is an important indicator in their evaluation. The aroma of sweet cherry flowers is mainly derived from their essential oil. In this study, based on the results of a single-factor experiment, a Box–Behnken design was adopted for ultrasound- and microwave-assisted extraction of essential oil from sweet cherry flowers of the Brooks cultivar. With the objective of extracting the maximum essential oil yield (w/w), the optimal extraction process conditions were a liquid–solid ratio of 52 mL g−1, an extraction time of 27 min, and a microwave power of 435 W. The essential oil yield was 1.23%, which was close to the theoretical prediction. The volatile organic compounds (VOCs) of the sweet cherry flowers of four cultivars (Brooks, Black Pearl, Tieton and Summit) were identified via headspace solid phase microextraction (SPME) and gas chromatography–mass spectrometry (GC–MS). The results showed that a total of 155 VOCs were identified and classified in the essential oil from sweet cherry flowers of four cultivars, 65 of which were shared among the cultivars. The highest contents of VOCs were aldehydes, alcohols, ketones and esters. Ethanol, linalool, lilac alcohol, acetaldehyde, (E)-2-hexenal, benzaldehyde and dimethyl sulfide were the major volatiles, which were mainly responsible for the characteristic aroma of sweet cherry flowers. It was concluded that the VOCs of sweet cherry flowers were qualitatively similar; however, relative content differences were observed in the four cultivars. This study provides a theoretical basis for the metabolism and regulation of the VOCs of sweet cherry flowers.

scholarly journals Essential Oils of Four Virginia Mountain Mint (Pycnanthemum virginianum) Varieties Grown in North Alabama

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1397
Author(s):  
William N. Setzer ◽  
Lam Duong ◽  
Trang Pham ◽  
Ambika Poudel ◽  
Cuong Nguyen ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
University Research ◽  
Oil Yield ◽  
Research Station ◽  
Continuous Extraction ◽  
Chromatographic Techniques ◽  
Relative Differences ◽  
Essential Oil Yield ◽  
Very High

Virginia mountain mint (Pycnanthemum virginianum) is a peppermint-flavored aromatic herb of the Lamiaceae and is mainly used for culinary, medicinal, aromatic, and ornamental purposes. North Alabama’s climate is conducive to growing mint for essential oils used in culinary, confectionery, and medicinal purposes. There is, however, a need for varieties of P. virginianum that can be adapted and easily grown for production in North Alabama. Towards this end, four field-grown varieties with three harvesting times (M1H1, M1H2, M1H3; M2H1, M2H2, M2H3; M3H1, M3H2, M3H3, M4H1, M4H2, M4H3) were evaluated for relative differences in essential oil yield and composition. Thirty-day-old greenhouse-grown plants of the four varieties were transplanted on raised beds in the field at the Alabama A & M University Research Station in North Alabama. The plots were arranged in a randomized complete block with three replications. The study’s objective was to compare the four varieties for essential oil yield and their composition at three harvest times, 135, 155, and 170 days after planting (DAP). Essential oils were obtained by hydrodistillation with continuous extraction with dichloromethane using a Likens–Nickerson apparatus and analyzed by gas chromatographic techniques. At the first harvest, the essential oil yield of the four varieties showed that M1H1 had a yield of 1.15%, higher than M2H1, M3H1, and M4H1 with 0.91, 0.76, and 1.03%, respectively. The isomenthone concentrations increased dramatically through the season in M1 (M1H1, M1H2, M1H3) by 19.93, 54.7, and 69.31%, and M3 (M3H1, M3H2, M3H3) by 1.81, 48.02, and 65.83%, respectively. However, it increased only slightly in M2 and M4. The thymol concentration decreased slightly but not significantly in all four varieties; the thymol in M2 and M4 was very high compared with M1 and M3. The study showed that mountain mint offers potential for production in North Alabama. Two varieties, M1 and M3, merit further studies to determine yield stability, essential oil yield, composition, and cultivation development practices.

Herbage and Essential Oil Yield and Composition ofMentha piperitaL. in Different Plant Densities in Northern Latitudes

2002 ◽  
Vol 14 (4) ◽  
pp. 243-246 ◽  
Author(s):  
Katja S. Rissanen ◽  
Abbas Aflatuni ◽  
Päivi H. Tomperi ◽  
Jorma E. Jalonen ◽  
Kari M. Laine
Keyword(s):  
Essential Oil ◽  
Oil Yield ◽  
Northern Latitudes ◽  
Plant Densities ◽  
Essential Oil Yield

scholarly journals Biomass production and essential oil yield from leaves, fine stems and resprouts using pruning the crown of Aniba canelilla (H.B.K.) (Lauraceae) in the Central Amazon

2012 ◽  
Vol 42 (3) ◽  
pp. 355-362 ◽  
Author(s):  
Adriana Pellegrini Manhães ◽  
Valdir Florêncio da Veiga-Júnior ◽  
Larissa Silveira Moreira Wiedemann ◽  
Karenn Silveira Fernandes ◽  
Paulo de Tarso Barbosa Sampaio
Keyword(s):  
Essential Oil ◽  
Oil Production ◽  
Oil Yield ◽  
Leaf Biomass ◽  
Canopy Openness ◽  
Tree Crown ◽  
Wet Season ◽  
Tree Cutting ◽  
Essential Oil Yield ◽  
Essential Oil Production

Aniba canelilla (H.B.K.) Mez. is a tree species from Amazon that produces essential oil. The oil extraction from its leaves and stems can be an alternative way to avoid the tree cutting for production of essential oil. The aim of this study was to analyse factors that may influence the essential oil production and the biomass of resprouts after pruning the leaves and stems of A. canelilla trees. The tree crowns were pruned in the wet season and after nine months the leaves and stems of the remaining crown and the resprouts were collected, in the dry season. The results showed that the essential oil yield and chemical composition differed among the stems, leaves and resprouts. The stems' essential oil production differed between the seasons and had a higher production in the resprouting stems than the old stems of the remaining crown. The production of essential oil and leaf biomass of resprouts were differently related to the canopy openness, indicating that light increases the production of the essential oil and decreases the biomass of resprouting leaves. This study revealed that plant organs differ in their essential oil production and that the canopy openness must be taken into account when pruning the A. canelilla tree crown in order to achieve higher oil productivity.

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