Shading and Crop‐Cover Effects on Meadowfoam Oil Yield

A demonstration vegetable garden was constructed for students in elementary, middle and high schools to expose them to agricultural science. On Charter Day, a University-wide celebration, students were invited to the garden on the University campus. The purpose of this project was twofold: (1) for participants to learn how to make a garden and (2) for visitors to see a variety of available crops and cultural techniques. Approximately 30 vegetable crops were grown. The garden also presented some cultural practices to improve plant development, which included weed control by solarization, mulching, a drip irrigation system, staking, shading and crop cover. Different types of compost bins were shown and various nitrogen-fixing legumes were displayed as useful hedge plants for the garden.

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EFFECT OF DIFFERENT ABIOTIC STRESS ON ESSENTIAL OIL YIELD FROM AERIAL PART OF CYMBOPOGON FLEXUOSUS (NEES EX STEUD) WATS.

International Journal of Advanced Research ◽

10.21474/ijar01/2549 ◽

2016 ◽

Vol 4 (12) ◽

pp. 1490-1504

Author(s):

Vinutha M ◽

◽

Suchetha M. ◽

K.J.Thara Saraswathi. ◽

◽

...

Keyword(s):

Abiotic Stress ◽

Essential Oil ◽

Aerial Part ◽

Oil Yield ◽

Cymbopogon Flexuosus ◽

Essential Oil Yield

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Effect of NPK and Bio-Fertilizers Rates on the Vegetative Growth and Oil Yield of Ocimum basillicum L. Plants

Alexandria Science Exchange Journal An International Quarterly Journal of Science Agricultural Environments ◽

10.21608/asejaiqjsae.2015.2740 ◽

2015 ◽

Vol 36 (January-March) ◽

pp. 58-72 ◽

Cited By ~ 1

Keyword(s):

Vegetative Growth ◽

Oil Yield

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N, P and K Fertilizers Alter Plant Growth, Essential Oil Yield and Gender of Sweet Gale (Myrica gale L)

The Open Plant Science Journal ◽

10.2174/1874294701408010009 ◽

2014 ◽

Vol 8 (1) ◽

pp. 9-17

Author(s):

X. Chang ◽

P. Martin

Keyword(s):

Plant Growth ◽

Field Trials ◽

Oil Yield ◽

Oil Composition ◽

Myrica Gale ◽

The North ◽

Oil Concentration ◽

N Treatment ◽

And Gender ◽

Essential Oil Yield

To investigate whether the fertilizers N, P or K individually affect plant growth, oil content and the gender of sweet gale, two trials, pot and field trials, were carried out at Orkney College UHI in Scotland. A pot trial was established with eight soils which were collected from different sweet gale trial sites in the north of Scotland. Although neither shoot yield nor oil concentration in shoots was affected by soil, there were significant differences in shoot yields as a result of fertilizer treatments (nitrogen (N), phosphorus (P), potassium (K) or none (control)). The best yield was obtained from the N treatment which was double to that of the control and P treatments. N, P or K fertilizers did not consistently affect shoot oil concentration in two seasons; however, oil yield was significantly affected, and N treatment produced two-three fold oil yield increases compared with the control or P treatment. In the N treatment, the increase in shoot yield was positively correlated with total nitrogen or nitrate nitrogen in the soil, suggesting the occurrence of a nitrogen priming effect. Data suggested that as shoot yield increased the oil concentration in shoots decreased. Neither soil nor N, P or K fertilizers had a significant effect on oil composition. Amongst fertilizer treatments, P resulted in the largest number of plants changing gender from female to male. A field N trial confirmed that nitrogen significantly enhanced the shoot yield of young plants.

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Bio-Oil Characterizations of Spirulina Platensis Residue (SPR) Pyrolysis Products for Renewable Energy Development

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.849.47 ◽

2020 ◽

Vol 849 ◽

pp. 47-52

Author(s):

Siti Jamilatun ◽

Aster Rahayu ◽

Yano Surya Pradana ◽

Budhijanto ◽

Rochmadi ◽

...

Keyword(s):

Renewable Energy ◽

Spirulina Platensis ◽

Pyrolysis Temperature ◽

Renewable Energy Sources ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Oil Yield ◽

Optimum Temperature ◽

Pyrolysis Products ◽

Bio Oil

Nowadays, energy consumption has increased as a population increases with socio-economic developments and improved living standards. Therefore, it is necessary to find a replacement for fossil energy with renewable energy sources, and the potential to develop is biofuels. Bio-oil, water phase, gas, and char products will be produced by utilizing Spirulina platensis (SPR) microalgae extraction residue as pyrolysis raw material. The purpose of this study is to characterize pyrolysis products and bio-oil analysis with GC-MS. Quality fuel is good if O/C is low, H/C is high, HHV is high, and oxygenate compounds are low, but aliphatic and aromatic are high. Pyrolysis was carried out at a temperature of 300-600°C with a feed of 50 grams in atmospheric conditions with a heating rate of 5-35°C/min, the equipment used was a fixed-bed reactor. The higher the pyrolysis temperature, the higher the bio-oil yield will be to an optimum temperature, then lower. The optimum temperature of pyrolysis is 550°C with a bio-oil yield of 23.99 wt%. The higher the pyrolysis temperature, the higher the H/C, the lower O/C. The optimum condition was reached at a temperature of 500°C with the values of H/C, and O/C is 1.17 and 0.47. With an increase in temperature of 300-600°C, HHV increased from 11.64 MJ/kg to 20.63 MJ/kg, the oxygenate compound decreased from 85.26 to 37.55 wt%. Aliphatics and aromatics increased, respectively, from 5.76 to 36.72 wt% and 1.67 to 6.67 wt%.

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

Scientific Reports ◽

10.1038/s41598-020-80891-0 ◽

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.

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