scholarly journals Biotransformation of poly(cis-1,4-isoprene) in a multiphase enzymatic reactor for continuous extraction of oligo-isoprenoid molecules

2020 ◽  
Vol 58 ◽  
pp. 10-16 ◽  
Author(s):  
Rodrigo Andler ◽  
Cristian Valdés ◽  
Alvaro Díaz-Barrera ◽  
Alexander Steinbüchel
Keyword(s):  
Continuous Extraction ◽  
Enzymatic Reactor

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.

Hybrid Model for an Enzymatic Reactor

2003 ◽  
pp. 413-422
Author(s):  
Ruy Sousa ◽  
Mariam M. Resende ◽  
Raquel L. C. Giordano ◽  
Roberto C. Giordano
Keyword(s):  
Hybrid Model ◽  
Enzymatic Reactor

scholarly journals Solar powered smart irrigation system

2019 ◽  
Author(s):  
Viswanatha V
Keyword(s):  
Solar Energy ◽  
Irrigation System ◽  
Photovoltaic Cells ◽  
Gain Control ◽  
Continuous Extraction ◽  
Reservoir Water ◽  
Op Amp ◽  
System P ◽  
Wet Condition ◽  
Solar Powered

In the field of agriculture, use of proper method of irrigation is important because the  main reason is the lack of rains and scarcity of land reservoir water. The continuous extraction of water from earth is reducing the water level due to which lot of land is coming slowly in the zones of  un-irrigated land. Another very important reason of this is due to unplanned use of water due to which a significant amount of water goes waste. The system derives power from solar energy through photovoltaic cells. Hence, dependency on erratic commercial power is not required. In this paper we use solar energy which is used to operate the irrigation pump. The circuit comprises of sensor parts built using op-amp IC. Op-amp’s are configured here as a comparator. Two stiff  probes are inserted in the soil to sense whether the soil is wet  or dry. A microcontroller is used to control the whole system by monitoring the sensors and when sensors sense dry condition of soil, then microcontroller will send command to relay driver IC the contacts of which are used to switch on the motor and it will switch off the motor when the soil is in wet condition. The microcontroller does the above job as it receives the signal from the sensors through the output of the comparator, and these signals operate which is stored in ROM of the microcontroller. The condition of the pump i.e., ON/OFF is displayed on a 16X2 LCD which is interfaced to the microcontroller. Further it can be enhanced in future by interfacing it with a GSM modem to gain control over the switching operation of the motor.

Improvement of the Waste-Oil Vacuum-Distillation Recycling by Continuous Extraction with Dense Propane

2007 ◽  
Vol 46 (1) ◽  
pp. 266-272 ◽  
Author(s):  
Jesusa Rincón ◽  
Pablo Cañizares ◽  
María Teresa García
Keyword(s):  
Vacuum Distillation ◽  
Waste Oil ◽  
Continuous Extraction

Semi-continuous extraction/hydrolysis of spent coffee grounds with subcritical water

2019 ◽  
Vol 72 ◽  
pp. 453-456 ◽  
Author(s):  
Bruno M. Pedras ◽  
Murilo Nascimento ◽  
Isabel Sá-Nogueira ◽  
Pedro Simões ◽  
Alexandre Paiva ◽  
...  
Keyword(s):  
Subcritical Water ◽  
Spent Coffee Grounds ◽  
Continuous Extraction ◽  
Coffee Grounds ◽  
Hydrolysis Of

scholarly journals Bicomponent Fiber Extraction Process for Textile Applications

2018 ◽  
Vol 13 (1) ◽  
pp. 155892501801300
Author(s):  
Philip Mooney ◽  
John Shearer ◽  
Joey Mead ◽  
Carol Barry ◽  
Quoc Truong ◽  
...  
Keyword(s):  
Continuous Process ◽  
Extraction Process ◽  
Protective Equipment ◽  
Continuous Extraction ◽  
Bicomponent Fibers ◽  
Extraction Behavior ◽  
Fiber Extraction ◽  
Military Applications ◽  
Temperature Component ◽  
Unique Core

Tailoring surface properties is important for military applications such as uniforms, shelters, and personal protective equipment. Unique superomniphobic structures for self-cleaning textiles can be created with bi-component fibers. In this work bicomponent fibers were melt extruded using an extractable polymer as one of the two components. Using water to extract the soluble component, fibers with unique core designs were created. The extraction behavior was found to be dependent on temperature, component fraction, and residence time. A continuous extraction process was designed and evaluated for the creation of superomniphobic fibers in a continuous process.

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