High Pressure-Assisted Infusion of Calcium into Baby Carrots Part II: Influence of Process Variables on β-carotene Extraction and Color of the Baby Carrots

2019 ◽  
Vol 12 (4) ◽  
pp. 613-624 ◽  
Author(s):  
N. S. Gosavi ◽  
D. Salvi ◽  
M. V. Karwe
Keyword(s):  
High Pressure ◽  
Process Variables ◽  
Baby Carrots ◽  
Β Carotene

Effect of solvent on absorption spectra of all-trans-β-carotene under high pressure

2008 ◽  
Vol 128 (12) ◽  
pp. 124501 ◽  
Author(s):  
W. L. Liu ◽  
Z. R. Zheng ◽  
Z. F. Dai ◽  
Z. G. Liu ◽  
R. B. Zhu ◽  
...  
Keyword(s):  
High Pressure ◽  
Absorption Spectra ◽  
Effect Of Solvent ◽  
Β Carotene

Separation of Carotene Stereoisomers in Vegetables

1970 ◽  
Vol 53 (5) ◽  
pp. 937-940 ◽  
Author(s):  
J P Sweeney ◽  
A C Marsh
Keyword(s):  
High Pressure ◽  
Chromatographic Method ◽  
High Pressures ◽  
Nitrogen Pressure ◽  
Provitamin A ◽  
High Pressure Liquid Chromatographic ◽  
Liquid Chromatographic Method ◽  
Calcium And Magnesium ◽  
Liquid Chromatographic ◽  
Β Carotene

Abstract A high pressure liquid chromatographic method has been developed for separation of provitamin A carotene stereoisomers in vegetables. A column designed to withstand high pressures is packed tightly with a mixture of calcium and magnesium hydroxides. An elution mixture of 1.5%p-methylanisole in petroleum ether is forced through by nitrogen pressure. Resolution of as many as 7 isomers is obtained in less than 1 hr. The principal stereoisomer of all-trans-β-carotene in green vegetables was found to be neo-β-carotene U. In red and yellow vegetables, it was neo-β- carotene B.

Interlocking of β-carotene in beta-lactoglobulin aggregates produced under high pressure

2013 ◽  
Vol 139 (1-4) ◽  
pp. 253-260 ◽  
Author(s):  
Azza Mensi ◽  
Yvan Choiset ◽  
Thomas Haertlé ◽  
Emmanuelle Reboul ◽  
Patrick Borel ◽  
...  
Keyword(s):  
High Pressure ◽  
Beta Lactoglobulin ◽  
Β Carotene

scholarly journals High-Pressure Homogenization and Biocontrol Agent as Innovative Approaches Increase Shelf Life and Functionality of Carrot Juice

Foods ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2998
Author(s):  
Davide Gottardi ◽  
Lorenzo Siroli ◽  
Giacomo Braschi ◽  
Samantha Rossi ◽  
Federico Ferioli ◽  
...  
Keyword(s):  
High Pressure ◽  
Shelf Life ◽  
Functional Properties ◽  
Biocontrol Agent ◽  
Fruit Juices ◽  
Combined Effect ◽  
High Pressure Homogenization ◽  
Carrot Juice ◽  
Combined Treatments ◽  
Β Carotene

Recently, application of high-pressure homogenization (HPH) treatments has been widely studied to improve shelf life and rheological and functional properties of vegetable and fruit juices. Another approach that has drawn the attention of researchers is the use of biocontrol cultures. Nevertheless, no data on their possible combined effect on fruit juices shelf life and functionality have been published yet. In this work, the microbial, organoleptic, and technological stability of extremely perishable carrot juice and its functionality were monitored for 12 and 7 days (stored at 4 and 10 °C, respectively) upon HPH treatment alone or in combination with a fermentation step using the biocontrol agent L. lactis LBG2. HPH treatment at 150 MPa for three passes followed by fermentation with L. lactis LBG2 extended the microbiological shelf life of the products of at least three and seven days when stored at 10 °C and 4 °C, respectively, compared to untreated or only HPH-treated samples. Moreover, the combined treatments determined a higher stability of pH and color values, and a better retention of β-carotene and lutein throughout the shelf-life period when compared to unfermented samples. Eventually, use of combined HPH and LBG2 resulted in the production of compounds having positive sensory impact on carrot juice.

scholarly journals Embedded Based Real-Time Monitoring in the High-Pressure Resin Transfer Molding Process for CFRP

2019 ◽  
Vol 9 (9) ◽  
pp. 1795 ◽  
Author(s):  
Kim ◽  
Kim ◽  
Hwang ◽  
Kim
Keyword(s):  
High Pressure ◽  
Real Time ◽  
Process Monitoring ◽  
High Speed ◽  
Resin Transfer Molding ◽  
Time Signal ◽  
Process Variables ◽  
Molding Process ◽  
Transfer Molding ◽  
Rtm Process

Carbon Fiber Reinforced Plastics (CFRP) is a material developed for its high strength and light weight in a broad variety of industries including aerospace, automotive, and leisure. Due to the rapid molding cycle time, high-pressure resin transfer molding (HP-RTM) processes are prone to molding defects and susceptible to various process variables such as the resin injection rate, pressure and temperature in the mold, vacuum, end-gap, pressing force, and binder. In recent years, process monitoring technology with various sensors has been applied to stabilize the HP-RTM process and control process variables. The field-programmable gate array (FPGA) based embedded monitoring system proposed in this study enabled high-speed real-time signal processing with multiple sensors, namely pressure, temperature, and linear variable differential transformer (LVDT), and proved feasibility in the field. In the HP-RTM process, the impregnation and curing of the resin were predicted from the cavity pressure and temperature variations during the injection and curing stages. In addition, the thickness of the CFRP specimen was deduced from the change in the end-gap through the detection of the LVDT signal. Therefore, the causes of molding defects were analyzed through process monitoring and the influence of molding defects on the molding quality of CFRP was investigated.

High-Pressure Vapor−Liquid Equilibrium Data for Systems Involving Carbon Dioxide + Organic Solvent + β-Carotene

2007 ◽  
Vol 52 (4) ◽  
pp. 1437-1441 ◽  
Author(s):  
Gustavo R. Borges ◽  
Alexander Junges ◽  
Elton Franceschi ◽  
Fernanda C. Corazza ◽  
Marcos L. Corazza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Organic Solvent ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Equilibrium Data ◽  
Β Carotene ◽  
Vapor Liquid

scholarly journals Determination of β-Carotene in Supplements and Raw Materials by Reversed-Phase High Pressure Liquid Chromatography: Collaborative Study

2005 ◽  
Vol 88 (5) ◽  
pp. 1279-1291 ◽  
Author(s):  
John Szpylka ◽  
Jonathan W DeVries ◽  
S Bhandari ◽  
M H Bui ◽  
D Ji ◽  
...  
Keyword(s):  
High Pressure ◽  
Liquid Chromatography ◽  
Standard Deviation ◽  
Relative Standard Deviation ◽  
High Pressure Liquid Chromatography ◽  
Raw Materials ◽  
Reversed Phase ◽  
Official Method ◽  
Relative Standard ◽  
Β Carotene

Abstract Twelve laboratories representing 4 countries participated in an interlaboratory study conducted to determine all-trans-β-carotene and total β-carotene in dietary supplements and raw materials. Thirteen samples were sent as blind duplicates to the collaborators. Results obtained from 11 laboratories are reported. For products composed as softgels and tablets that were analyzed for total β-carotene, the reproducibility relative standard deviation (RSDR) ranged from 3.35 to 23.09% and the HorRat values ranged from 1.06 to 3.72. For these products analyzed for trans β-carotene, the reproducibility relative standard deviation (RSDR) ranged from 4.28 to 22.76% and the HorRat values ranged from 0.92 to 3.37. The RSDr and HorRat values in the analysis of a beadlet raw material were substantial and it is believed that the variability within the material itself introduced significant variation in subsampling. The method uses high pressure liquid chromatography (LC) in the reversed-phase mode with visible light absorbance for detection and quantitation. If high levels of α-carotenes are present, a second LC system is used for additional separation and quantitation of the carotene species. It is recommended that the method be adopted as an AOAC Official Method.

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