Wine dealcoholization using new method for low temperature nitrogen assisted distillation

New InnoSolv llc. device for low temperature nitrogen assisted distillation was used for wine dealcoholization. The method approved by virtue of collaboration of InoSolv Ltd and UFT include evaporation of alcohol and other volatiles at a temperature not exceeding 32 °C in entirely nitrogen atmosphere. The three regime of wine treatment were used, reducing alcohol level of the treated wine respectively up to 9.80 (regime A); 5.85 (regime B) and 2.75 vol.% (regime C) starting from 14.15 vol.% of the initial wine. More than 80.0% of the esters of the initial wine remain in the treated wine in regime A. The volatiles such as esters, higher alcohols and aldehydes as well as some individual specific volatile compounds were determined in the treated wines and in the separated distillates. The presence of suspended particles does not interfere the proper operation of the installation and device can be used for wines during theirs fermentation. The system and method for offer gentle regimes wine treatment and low operating costs thanks to heat pump incorporation. There is not requirement for steam consumption and cooling water compared to alternative methods. The system is fully closed, without venting outside which is substantial for aroma preservation

On the subcritical extraction of Rosa damascena Mill.

Subcritical extraction of Rosa damascena Mill. has been performed with Freon R143a [1]. The pressure and duration of the process have been studied to obtain the highest possible yield. It was found that a short-time triple extraction at low pressures of 5-6 bar resulted in the highest yield–0.151%. The chemical composition of the product revealed a high terpene/scent content: β-phenylethyl alcohol (25.6-54.1%), citronellol (1.9-2.3%), geraniol (1.2-3.8%) and nerol (1.8-2.9%). The distribution of paraffins’ content was: nonadecane (2.7-4.9%), nonadecene (3.0-5.6%), eicosane (4.4-9.4%) and heneicosane (4.4-9.8%). The deviations in the constituents of the day product and the year batch production have been discussed. The yield and composition are compared with other rose aromatic products [2,3]

LAVENDER EXTRACT WITH TETRAFLOUROETHANE - CHEMICAL COMPOSITION, ANTIMICROBIAL ACTIVITY AND APPLICATION IN COSMETICS

The chemical composition of extract from lavender (Lavandula angustifolia Mill.) by extraction with tetrafluoroethane was analyzed using GC and GC/MS. The main compounds (concentration higher than 3%) of extract were: linalool (32.48%), linalyl acetate (22.98%), borneol (5.12%), cis-linaloloxide (4.49%), (E)-β-farnesene (4.10%), lavandulol (4.22%) and β-caryophyllene (3.34%). The extract is used in model cosmetic emulsions O/W type. The studied extract demonstrated antimicrobial activity against Gram-positive and Gram-negative bacteria.The chemical composition of extract from lavender (Lavandula angustifolia Mill.) by extraction with tetrafluoroethane was analyzed using GC and GC/MS. The main compounds (concentration higher than 3%) of extract were: linalool (32.48%), linalyl acetate (22.98%), borneol (5.12%), cis-linaloloxide (4.49%), (E)-β-farnesene (4.10%), lavandulol (4.22%) and β-caryophyllene (3.34%). The extract is used in model cosmetic emulsions O/W type. The studied extract demonstrated antimicrobial activity against Gram-positive and Gram-negative bacteria

Determination of coefficient of performance of mechanical vapour recompression heat pump

Mechanical vapour recompression heat pump systems are widely used in the industry -in evaporator and distillation installations, in seawater desalination and industrial wastewater treatment plants. The estimation of the energy efficiency level of this type of system is based on values of two basic parameters: specific energy consumption for production of 1 kg clean water (condensate) and actual coefficient of performance of heat pump system. The object of study is experimental determination of value of actual coefficient of performance of mechanical vapour recompression heat pump system for wastewater treatment. A mathematical regression equation between the actual coefficient of performance μ and two significant factors – temperature of secondary water vapour tsv and compression ratio of water vapour in mechanical compressor of heat pump system σ is received. The analysis show that actual coefficient of performance μ highly depends of value of compression ratio σ and less depends of values of temperature of secondary vapour tsv. It conclude that MVR heat pump system, in order to operate with high values of the actual coefficient of performance should be working to high values of temperature of secondary vapour and low values of compression ratio of water vapour in mechanical compressor

Subcritical Extracts from Major Species of Oil-Bearing Roses—A Comparative Chemical Profiling

A comprehensive chemical profiling of 1,1,1,2-tetrafluoroethane (freon R134a) subcritical extracts from the main genotypes of oil-bearing roses, was performed by gas chromatography–mass spectrometry (GC/MS) and gas chromatography with flame ionization detection (GC-FID) in order to reveal the differences in their chemical composition. One hundred and three individual compounds were identified using GC/MS and their quantitative content was determined using GC-FID, representing 89.8, 92.5, 89.7 and 93.7% of the total content of Rosa gallica L., Rosa damascena Mill., Rosa alba L. and Rosa centifolia L. extracts, respectively. The compounds found in the extracts are representatives of the following main chemical classes: mono-, sesqui- and triterpenoids, phenylethanoids and phenylpropanoids and aliphatic hydrocarbons. Fatty acids, esters and waxes were found, as well. The study revealed that 2-phenylethanol is the most abundant component, ranging 9.0–60.9% followed by nonadecane and nonadecene with 5.1–18.0% geraniol (2.9–14.4%), heneicosane (3.1–11.8%), tricosane (0.1–8.6%), nerol (1.3–6.1%) and citronellol (1.7–5.3%). The extracts demonstrate a specific chemical profile, depending on the botanical species—phenylethanoids and phenyl propanoids are the main group for R. damascena, aliphatic hydrocarbons for R. alba and R. centifolia, while both are found in almost equal amounts in R. gallica. The terpenoid compounds show relatively broad variations: monoterpenes—11.9–25.5% with maximum in R. centifolia; sesquiterpenes—0.6–7.0% with maximum in R. gallica and triterpenes—0.4–3.7% with maximum in R. gallica extract

Subcritical Water Extraction of Rosmarinic Acid from Lemon Balm (<i>Melissa officinalis</i> L.) and Its Effect on Plant Cell Wall Constituents

Rosmarinic acid (RA), an ester of caffeic acid and 3,4-dihydroxyphenyllactic acid, is a potent radical scavenger, a chelator of prooxidant ions, and an inhibitor of lipid peroxidation. RA-containing extracts are widely used natural antioxidants in food products, and many herbal preparations and food supplements, containing RA, are marketed with claims of beneficial health effects. The current study investigated the effectiveness of subcritical water extraction (SWE) for the recovery of RA from lemon balm (Melissa officinalis), as a “green” alternative to conventional hydro-alcoholic extraction. Different durations (10 min and 20 min) and extraction temperatures (100 °C and 150 °C) were applied. Subcritical water applied at a temperature of 100 °C was equally efficient as 50% ethanol in extracting RA. However, the further elevation of temperature to 150 °C decreased RA content by up to 20% due to thermal degradation. The content of RA in dried extracts was between 2.36% and 5.55% and the higher temperature of SWE increased extract yield by up to 41%. The higher extraction yield resulted from the degradation of plant material by subcritical water as evidenced by the increased extraction and degradation of proteins, pectin, and cellulose. These results reveal that SWE is an efficient technology for the extraction of RA and other antioxidants from lemon balm at reduced extraction time and without the use of toxic organic solvents. Furthermore, by modification of SWE conditions, dry extracts with different purity and content of RA are obtained. These extracts could be used in the food industry as food antioxidants, or in the development of food supplements and functional foods

Lavender Extract with Tetraflouroethane - Chemical Composition, Antimicrobial Activity and Application in Cosmetics

The chemical composition of extract from lavender (Lavandula angustifolia Mill.) by extraction with tetrafluoroethane was analyzed using GC and GC/MS. The main compounds (concentration higher than 3%) of extract were: linalool (32.48%), linalyl acetate (22.98%), borneol (5.12%), cis-linaloloxide (4.49%), (E)-β-farnesene (4.10%), lavandulol (4.22%) and β-caryophyllene (3.34%). The extract is used in model cosmetic emulsions O/W type. The studied extract demonstrated antimicrobial activity against Gram-positive and Gram-negative bacteria

Biopreservation of emulsified food and cosmetic products by synergistic action of probiotics and plant extracts: a Franco-Bulgarian perspective

International audienceIn the context of growing interest for functional foods and cosmetic products, emulsified products such as dressings or lotions have been proposed to deliver probiotics and plant extracts with interesting biological (e. g. anti-inflammatory) properties due to their daily consumption or application on skin, respectively. Besides these positive effects, emulsified products containing water are often prone to microbial growth justifying thus the addition of preservatives such as parabens in their formulation. Safety concerns regarding some synthetic preservatives have stimulated the development of natural antimicrobial ingredients (namely from plant or microbial origin) for the preservation of food or cosmetic products. Besides direct addition of antimicrobial biomolecules, the addition of living bioprotective bacteria such as probiotic lactic acid bacteria (LAB) is a promising approach. Franco-Bulgarian ESCAPE project ambition is to identify synergistic combinations of such probiotic LAB and plant extracts for the preservation of food or cosmetic emulsions. The methodology and the relevant scientific questions (application of hurdle technology principles, selection of plant extracts not affecting LAB growth/viability and antimicrobial activity, distribution of LAB and antimicrobial metabolites in the different phases of emulsions, effect of LAB and plant extracts on emulsions stability…) to tackle this objective are presented and discussed