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Sample records for strawberry juice electronic

  1. Discrimination and characterization of strawberry juice based on electronic nose and tongue: comparison of different juice processing approaches by LDA, PLSR, RF, and SVM.

    Science.gov (United States)

    Qiu, Shanshan; Wang, Jun; Gao, Liping

    2014-07-09

    An electronic nose (E-nose) and an electronic tongue (E-tongue) have been used to characterize five types of strawberry juices based on processing approaches (i.e., microwave pasteurization, steam blanching, high temperature short time pasteurization, frozen-thawed, and freshly squeezed). Juice quality parameters (vitamin C, pH, total soluble solid, total acid, and sugar/acid ratio) were detected by traditional measuring methods. Multivariate statistical methods (linear discriminant analysis (LDA) and partial least squares regression (PLSR)) and neural networks (Random Forest (RF) and Support Vector Machines) were employed to qualitative classification and quantitative regression. E-tongue system reached higher accuracy rates than E-nose did, and the simultaneous utilization did have an advantage in LDA classification and PLSR regression. According to cross-validation, RF has shown outstanding and indisputable performances in the qualitative and quantitative analysis. This work indicates that the simultaneous utilization of E-nose and E-tongue can discriminate processed fruit juices and predict quality parameters successfully for the beverage industry.

  2. Teeth re-whitening effect of strawberry juice on coffee stained teeth

    OpenAIRE

    Annisya Pramesti; Tadeus Arufan Jasrin; Opik Taofik Hidayat

    2018-01-01

    Many people favor coffee. However, regarding health and aesthetic dentistry, coffee gives a negative effect. Tanin in coffee causes a brown stain on the tooth surface. Therefore, in aesthetic dental care, teeth whitening has become popular matter. One of the natural ingredients used for teeth whitening treatment is strawberry. The purpose of this study was to obtained data regarding the effect of strawberry juice on the re-whitening process of the coffee-stained tooth enamel surface. This stu...

  3. Teeth re-whitening effect of strawberry juice on coffee stained teeth

    Directory of Open Access Journals (Sweden)

    Annisya Pramesti

    2018-01-01

    Full Text Available Many people favor coffee. However, regarding health and aesthetic dentistry, coffee gives a negative effect. Tanin in coffee causes a brown stain on the tooth surface. Therefore, in aesthetic dental care, teeth whitening has become popular matter. One of the natural ingredients used for teeth whitening treatment is strawberry. The purpose of this study was to obtained data regarding the effect of strawberry juice on the re-whitening process of the coffee-stained tooth enamel surface. This study was a pure experimental in-vitro using Friedman and Wilcoxon Matched Pairs Tests for statistical analysis. The population of this study was anterior teeth. The samples were maxillary central incisors. The sampling technique using sample size determination based on the testing formulas of the difference of two average data pairs resulted in 11 specimens. The result of the research showed that all coffee-stained teeth sample had an increasing enamel colour index. The samples were then applied with strawberry juice resulted in a significant average difference colour index value indicated by p<0.001. The conclusion of this research indicated that there was an effect of strawberry juice on the coffee-stained teeth re-whitening process.

  4. Hyperbaric storage at room temperature for food preservation: A study in strawberry juice

    OpenAIRE

    Segovia-Bravo, Kharla A.; Guignon, Bérengère; Bermejo-Prada, Ana; Sanz Martínez, Pedro D.; Otero, Laura

    2012-01-01

    Hyperbaric storage at room temperature was evaluated as a new food preservation method. To do that, strawberry juices maintained at different pressure levels (0.1, 25, 100 or 220 MPa) and 20°C for 15 days were compared to raw and thermally pasteurized samples stored at atmospheric pressure and 5°C for the same period. Hyperbaric storage reduced the initial microbial load of the juices by more than 2 log units to levels below the limit of detection. Moreover, pressure was effective to attenuat...

  5. Effect of High Intensity Ultrasound and Pasteurization on Anthocyanin Content in Strawberry Juice

    Directory of Open Access Journals (Sweden)

    Igor Dubrović

    2011-01-01

    Full Text Available The purpose of this investigation is to study the influence of high intensity ultrasound and pasteurization on the stability of anthocyanins and their content in strawberry juice. Different ultrasound process parameters for the treatment of juices are compared to the classical thermal treatments. For ultrasound treatments, three parameters were varied according to the statistical experimental design. Central composite design was used to optimize and design experimental parameters: temperature (25, 40 and 55 °C, amplitude (60, 90 and 120 μm and time (3, 6, and 9 min. It was found that the anthocyanin content after pasteurization (85 °C for 2 min was reduced by 5.3 to 5.8 % compared to untreated juices. After treatment with ultrasound (20 °C for 3, 6 or 9 min or thermosonication (40 °C for 3, 6 or 9 min and 60 °C for 3 or 6 min, the degradation of anthocyanins was generally less intensive and was 0.7–4.4 % compared to the untreated juices. Only in the case of ultrasonic treatment at a temperature of 55 °C and treatment time of 9 min the total content of anthocyanins, compared to untreated juice, was reduced by 5.8 to 7.1 %, and their degradation was greater than that of pasteurized juices. From the results it can be concluded that total anthocyanin content was greater in more than 85 % of the selected ultrasound treatments compared to pasteurized juices. Ultrasound treatment can replace pasteurization in terms of preserving total anthocyanin content. The modelling approaches using response surface methodology (RSM developed in this study exploit data in order to identify the optimal processing parameters for lowering degradation of anthocyanins in strawberry juice during ultrasound processing.

  6. Relationship between carbohydrate composition and fungal deterioration of functional strawberry juices preserved using non-thermal treatments.

    Science.gov (United States)

    Cassani, Lucía; Quintana, Gabriel; Moreira, María R; Gómez-Zavaglia, Andrea

    2017-12-12

    The quantification of the main carbohydrates present in strawberry juices enriched with inulin and fructo-oligosaccharides (FOS) and preserved by non-thermal techniques (vanillin and ultrasound) was conducted, in addition to an investigation of the evolution of these compounds and their relationship with fungal deterioration over 14 days of refrigerated storage. A simple and environmentally friendly analytical approach based on high-performance liquid chromatography with a reflection index detector was developed for simultaneous determination of inulin, FOS and mono- and disaccharides present in the juices. When analyzing the evolution of carbohydrates during storage, a direct relationship between the consumption of sucrose and the growth of yeasts and molds (main spoilage flora in strawberry) was observed, especially in untreated samples (control). By contrast, no sucrose consumption was observed during storage of the treated sample, thus demonstrating the efficiency of the non-thermal treatments for controlling yeasts and mold growth. In turn, inulin and FOS added to juices were not degraded during storage. The results obtained in the present study demonstrate that non-thermal treatments are adequate for preventing the growth of deteriorative flora in strawberry juices and that the addition of inulin and FOS can be a good strategy for functionalizing them, as well as improving their nutritional properties. © 2017 Society of Chemical Industry. © 2017 Society of Chemical Industry.

  7. Shelf-life dating of shelf-stable strawberry juice based on survival analysis of consumer acceptance information.

    Science.gov (United States)

    Buvé, Carolien; Van Bedts, Tine; Haenen, Annelien; Kebede, Biniam; Braekers, Roel; Hendrickx, Marc; Van Loey, Ann; Grauwet, Tara

    2018-07-01

    Accurate shelf-life dating of food products is crucial for consumers and industries. Therefore, in this study we applied a science-based approach for shelf-life assessment, including accelerated shelf-life testing (ASLT), acceptability testing and the screening of analytical attributes for fast shelf-life predictions. Shelf-stable strawberry juice was selected as a case study. Ambient storage (20 °C) had no effect on the aroma-based acceptance of strawberry juice. The colour-based acceptability decreased during storage under ambient and accelerated (28-42 °C) conditions. The application of survival analysis showed that the colour-based shelf-life was reached in the early stages of storage (≤11 weeks) and that the shelf-life was shortened at higher temperatures. None of the selected attributes (a * and ΔE * value, anthocyanin and ascorbic acid content) is an ideal analytical marker for shelf-life predictions in the investigated temperature range (20-42 °C). Nevertheless, an overall analytical cut-off value over the whole temperature range can be selected. Colour changes of strawberry juice during storage are shelf-life limiting. Combining ASLT with acceptability testing allowed to gain faster insight into the change in colour-based acceptability and to perform shelf-life predictions relying on scientific data. An analytical marker is a convenient tool for shelf-life predictions in the context of ASLT. © 2017 Society of Chemical Industry. © 2017 Society of Chemical Industry.

  8. Effect of added sugar and ascorbic acid on the anthocyanin content of high pressure processed strawberry juices during storage

    Science.gov (United States)

    Salamon, B.; Farkas, V.; Kenesei, Gy; Dalmadi, I.

    2017-10-01

    Berries have high nutritional value and can be processed in many kinds of ways. Their pigments (anthocyanins, flavonoids, carotenoids) have antioxidant properties, effectively neutralize the health-damaging free radicals. High hydrostatic pressure (HHP) technology is a minimal processing technique which is a promising alternative solution instead of traditional preservation technologies. Low molecular weight materials such as colour pigments are well preserved by application of HHP. However, the effect can be influenced by the composition of the treated food matrix. The available scientific information related to the impact of sugar and ascorbic acid content on the preservation of anthocyanins in the samples is controversial. Thus, the aim of our study was to determine the effect of HHP treatment parameters (pressure, treatment time) on the preservation of the anthocyanin content of strawberry juice supplemented by different amounts of sugar and ascorbic acid. 2n type factorial experimental design was used to evaluate the effect of four factors (refraction index, ascorbic acid, pressure, treatment time) on the residual content of total anthocyanins immediately after HHP treatment and after 21 days storage at room temperature.

  9. Impact of ultraviolet radiation treatments on the physicochemical properties, antioxidants, enzyme activity and microbial load in freshly prepared hand pressed strawberry juice.

    Science.gov (United States)

    Bhat, Rajeev; Stamminger, Rainer

    2015-07-01

    Freshly prepared, hand-pressed strawberry fruit juice was exposed to ultraviolet radiation (254 nm) at room temperature (25 ℃ ± 1 ℃) for 15, 30 and 60 min with 0 min serving as control. Results revealed decrease in pH, total soluble solids and titratable acidity, while colour parameters (L*, a* and b* values) and clarity of juice (% transmittance) increased significantly. All the results corresponded to exposure time to ultraviolet radiation. Bioactive compounds (total phenolics, ascorbic acid and anthocyanins) decreased along with a recorded reduction in polyphenol oxidase enzyme and 1,1-diphenyl-2-picryl hydrazyl radical scavenging activities, which were again dependent on exposure time. Results on the microbial studies showed significant reduction by 2-log cycles in aerobic plate count as well as in total yeast and mould counts. Though negative results were observed for certain parameters, this is the first time it was endeavoured to demonstrate the impact of ultraviolet radiation radiation on freshly prepared, hand-pressed strawberries juice. © The Author(s) 2014.

  10. Taste characteristics of Chinese bayberry juice characterized by sensory evaluation, chromatography analysis, and an electronic tongue.

    Science.gov (United States)

    Yu, Haiyan; Zhang, Yan; Zhao, Jie; Tian, Huaixiang

    2018-05-01

    To evaluate the taste characteristics of Chinese bayberry juice, four types of bayberry juice sourced from different origins and varieties were analysed using sensory evaluation, chromatography, spectroscopy analysis and an electronic tongue (E-tongue). Nine organic acids and three sugars were assessed using high performance liquid chromatography. Total polyphenols were measured by spectrophotometry. The overall taste profile was collected using the E-tongue. The four types of bayberry juice differed in the sensory attributes of sour, sweet, bitter, and astringent. The E-tongue responses combined with discriminant analysis were able to characterise the taste profiles of the juices. The relationships between the taste compounds and the sensory panel scores established by partial least squares showed that total polyphenols, quininic acid, maleic acid, fructose, citric acid, lactic acid, succinic acid and sucrose made significant contributions to the taste characteristics of the Chinese bayberry juice.

  11. Inactivation of E. coli O157:H7 and nonpathogenic E. coli in strawberry juice by pulsed electric field, sodium benzoate, potassium sorbate, and citric acid

    Science.gov (United States)

    Introduction: Current regulations require that juice processors effect a 5 log CFU/ml reduction of a target pathogen prior to distributing products. Whereas thermal pasteurization reduces the sensory characteristics of juice by altering flavor components, pulsed electric field (PEF) treatment may ...

  12. Investigation of Antioxidant Activity of Pomegranate Juices by Means of Electron Paramagnetic Resonance and UV-Vis Spectroscopy.

    Science.gov (United States)

    Kozik, Violetta; Jarzembek, Krystyna; Jędrzejowska, Agnieszka; Bąk, Andrzej; Polak, Justyna; Bartoszek, Mariola; Pytlakowska, Katarzyna

    2015-01-01

    Pomegranate fruit (Punica granatum L.) is a source of numerous phenolic compounds, and it contains flavonoids such as anthocyanins, anthocyanidins, cyanidins, catechins and other complexes of flavonoids, ellagitannins, and hydrolyzed tannins. Pomegranate juice shows antioxidant, antiproliferative, and anti-atherosclerotic properties. The antioxidant capacity (TEAC) of the pomegranate juices was measured using electron paramagnetic resonance (EPR) spectroscopy and 1,1-diphenyl-2-picrylhydrazyl (DPPH•) as a source of free radicals, and the total phenolic (TP) content was measured using UV-Vis spectroscopy. All the examined pomegranate juices exhibited relatively high antioxidant properties. The TEAC values determined by means of EPR spectroscopy using Trolox (TE) as a free radical scavenger were in the range of 463.12 to 1911.91 μmol TE/100 mL juice. The TP content measured by the Folin-Ciocalteu method, using gallic acid (GA) as a free radical scavenger, widely varied in the investigated pomegranate juice samples and ranged from 1673.62 to 5263.87 mg GA/1 L juice. The strongest antioxidant properties were observed with the fresh pomegranate juices obtained from the fruits originating from Israel, Lebanon, and Azerbaijan. Correlation analysis of numerical data obtained by means of EPR spectroscopy (TEAC) and UV-Vis spectroscopy (TP) gave correlation coefficient (r)=0.90 and determination coefficient (r2)=0.81 (P<0.05).

  13. Sodium benzoate, potassium sorbate, and citric acid induce sublethal injury and enhance pulsed electric field inactivation of E. coli O157:H7 and nonpathogenic surrogate E. coli in strawberry juice

    Science.gov (United States)

    Current FDA regulations require that juice processors effect a 5 log CFU/ml reduction of a target pathogen prior to distributing products. Whereas thermal pasteurization reduces the sensory characteristics of juice by altering flavor components, pulsed electric field (PEF) treatment can be conducte...

  14. Fast method for in-flight estimation of total dose from protons and electrons using RADE Minstrument on JUICE

    Science.gov (United States)

    Hajdas, Wojtek; Mrigakshi, Alankrita; Xiao, Hualin

    2017-04-01

    The primary concern of the ESA JUICE mission to Jupiter is the harsh particle radiation environment. Ionizing particles introduce radiation damage by total dose effects, displacement damages or single events effects. Therefore, both the total ionizing dose and the displacement damage equivalent fluence must be assessed to alert spacecraft and its payload as well as to quantify radiation levels for the entire mission lifetime. We present a concept and implementations steps for simplified method used to compute in flight a dose rate and total dose caused by protons. We also provide refinement of the method previously developed for electrons. The dose rates values are given for predefined active volumes located behind layers of materials with known thickness. Both methods are based on the electron and proton flux measurements provided by the Electron and Proton Detectors inside the Radiation Hard Electron Monitor (RADEM) located on-board of JUICE. The trade-off between method accuracy and programming limitations for in-flight computations are discussed. More comprehensive and precise dose rate computations based on detailed analysis of all stack detectors will be made during off-line data processing. It will utilize full spectral unfolding from all RADEM detector subsystems.

  15. Toxicity evaluation of e-juice and its soluble aerosols generated by electronic cigarettes using recombinant bioluminescent bacteria responsive to specific cellular damages.

    Science.gov (United States)

    Bharadwaj, Shiv; Mitchell, Robert J; Qureshi, Anjum; Niazi, Javed H

    2017-04-15

    Electronic-cigarettes (e-cigarette) are widely used as an alternative to traditional cigarettes but their safety is not well established. Herein, we demonstrate and validate an analytical method to discriminate the deleterious effects of e-cigarette refills (e-juice) and soluble e-juice aerosol (SEA) by employing stress-specific bioluminescent recombinant bacterial cells (RBCs) as whole-cell biosensors. These RBCs carry luxCDABE-operon tightly controlled by promoters that specifically induced to DNA damage (recA), superoxide radicals (sodA), heavy metals (copA) and membrane damage (oprF). The responses of the RBCs following exposure to various concentrations of e-juice/SEA was recorded in real-time that showed dose-dependent stress specific-responses against both the e-juice and vaporized e-juice aerosols produced by the e-cigarette. We also established that high doses of e-juice (4-folds diluted) lead to cell death by repressing the cellular machinery responsible for repairing DNA-damage, superoxide toxicity, ion homeostasis and membrane damage. SEA also caused the cellular damages but the cells showed enhanced bioluminescence expression without significant growth inhibition, indicating that the cells activated their global defense system to repair these damages. DNA fragmentation assay also revealed the disintegration of total cellular DNA at sub-toxic doses of e-juice. Despite their state of matter, the e-juice and its aerosols induce cytotoxicity and alter normal cellular functions, respectively that raises concerns on use of e-cigarettes as alternative to traditional cigarette. The ability of RBCs in detecting both harmful effects and toxicity mechanisms provided a fundamental understanding of biological response to e-juice and aerosols. Copyright © 2016 Elsevier B.V. All rights reserved.

  16. Storage of strawberry pollen

    Directory of Open Access Journals (Sweden)

    Rafet Aslantaş

    2013-12-01

    Full Text Available This study was carried out to determine storage ability of strawberry pollen at different temperatures for three different strawberry cultivars 'Aliso', 'Brio', and 'Cruz'. Strawberry pollen was stored at room temperature (22 ±2°C, +4°C, -4°C and -18°C in stabile humidity conditions. Strawberry poIlen was germinated using the hanging drop method in a 20% sucrose solution. Pollen germination rate increased because of low temperature storage. Pollen stored at room temperature and +4°C, -4°C, and -18°C was kept for 8 months, about one year, and 20 months, respectively. Pollen germination rates decreased as the length of storage period increased. The reaction of all cultivars tested on the duration and temperature of storage was similar.

  17. Electronic tongue response to chemicals in orange juice that change concentration in relation to harvest maturity and citrus greening or Huanglongbing (HLB) disease

    Science.gov (United States)

    In an earlier study, the electronic tongue system (etongue) was used to differentiate between orange juice made from healthy fruit and from fruit affected by the citrus greening or Huanglongbing (HLB) disease. This study investigated the reaction of an etongue system to the main chemicals in orange ...

  18. Bread-Board Testing of the Radiation Hard Electron Monitor (RADEM) being developed for the ESA JUICE Mission

    Science.gov (United States)

    Mrigakshi, Alankrita; Hajdas, Wojtek; Marcinkowski, Radoslaw; Xiao, Hualin; Goncalves, Patricia; Pinto, Marco; Pinto, Costa; Marques, Arlindo; Meier, Dirk

    2016-04-01

    The RADEM instrument will serve as the radiation monitor for the JUICE spacecraft. It will characterize the highly dynamic radiation environment of the Jovian system by measuring the energy spectra of energetic electrons and protons up to 40 MeV and 250 MeV, respectively. It will also determine the directionality of 0.3-10 MeV electrons. Further goals include the detection of heavy ions, and the determination of the corresponding LET spectra and dose rates. Here, the tests of the Electron and Proton Telescopes, and the Directionality Detector of the RADEM Bread-Board model are described. The objective of these tests is to validate RADEM design and physical concept applied therein. The tests were performed at various irradiation facilities at the Paul Scherrer Institute (PSI) where energy ranges relevant for space applications can be covered (electrons: ≤100 MeV and protons: ≤230 MeV). The measured values are also compared with GEANT4 Monte-Carlo Simulation results.

  19. Quality development of Danish strawberries

    DEFF Research Database (Denmark)

    Østergaard, Peder; Stacey, Julia

    1999-01-01

    The quality of fruit and berries has often been the topic of debate and Danish strawberries have been both praised and criticized. Therefore the Danish Institute of Agricultural Sciences, Danish Fruit Growers' Association, the Danish Veterinary and Food Administration and MAPP have joined together...... in a project about quality assurance of strawberries. One purpose of the project has been to provide systematic knowledge about Danish consumers' attitudes towards strawberries, knowledge, buying behaviour and consumption of strawberries. Another purpose has been to take an active part in the development...... of new strawberry varieties and growing methods and also to support better distribution and sale of strawberries. During 1999, focus group interviews and a representative study with 1174 householdswere carried out. In-home tests of existing and new varieties of strawberries will be carried out during...

  20. The prediction of food additives in the fruit juice based on electronic nose with chemometrics.

    Science.gov (United States)

    Qiu, Shanshan; Wang, Jun

    2017-09-01

    Food additives are added to products to enhance their taste, and preserve flavor or appearance. While their use should be restricted to achieve a technological benefit, the contents of food additives should be also strictly controlled. In this study, E-nose was applied as an alternative to traditional monitoring technologies for determining two food additives, namely benzoic acid and chitosan. For quantitative monitoring, support vector machine (SVM), random forest (RF), extreme learning machine (ELM) and partial least squares regression (PLSR) were applied to establish regression models between E-nose signals and the amount of food additives in fruit juices. The monitoring models based on ELM and RF reached higher correlation coefficients (R 2 s) and lower root mean square errors (RMSEs) than models based on PLSR and SVM. This work indicates that E-nose combined with RF or ELM can be a cost-effective, easy-to-build and rapid detection system for food additive monitoring. Copyright © 2017 Elsevier Ltd. All rights reserved.

  1. Detection and isolation of nepoviruses on strawberry in the Czech Republic.

    Science.gov (United States)

    Honetslegrová, J; Spak, J

    1995-06-01

    Arabis mosaic, strawberry latent ringspot, tomato black ring and raspberry ringspot nepoviruses were monitored using double sandwich enzyme-linked immunosorbent assay (DAS-ELISA) in 18 cultivars of strawberry Fragaria x ananassa Duch. in the Czech Republic. Arabis mosaic and strawberry latent ringspot viruses were detected, isolated and characterized on differential host plants and by electron microscopy. Both viruses were purified and antisera to them were prepared.

  2. Strawberries without struggle

    International Nuclear Information System (INIS)

    Crake, T.

    1980-01-01

    Advice on diseases and their control to make cultivation more profitable and the strawberries more appealing to consumers is given. Control over both leak disease and post-harvest anthracnose have been achieved with a combination of heat treatment and irradiation

  3. 'Florida Beauty' strawberry

    Science.gov (United States)

    ‘Florida Beauty’ strawberry (Fragaria x ananassa) originated from a 2012 cross made by the Queensland breeding program between Queensland Australia selection 2010-119 (female parent) and ‘Florida Radiance’ (male parent). Selection 2010-119 was chosen as a parent for its excellent fruit shape and fl...

  4. Effect of chemical compounds on electronic tongue response to citrus juices

    Science.gov (United States)

    The electronic tongue system mimics the process of taste detection by human taste buds and recognition by the brain, hence helping in prediction of taste. With this unique capability, the electronic tongue has been used for taste detection of a wide range of food products. As a preliminary step in p...

  5. Electron Density Measurement on JUICE Mission by Mutual Impedance Technique: MIME Instrument as a Part of RPWI Consortium

    Science.gov (United States)

    Rauch, J. L.; Henri, P.; Wahlund, J. E.; Le Duff, O.; Sene, O.; Colin, F.; Lagoutte, D.; Gilet, N.; Ahlen, L.; Bergman, J.; Gill, R.; Puccio, W.

    2017-09-01

    Mutual Impedance MEasurements (MIME) instrument is a part of the Radio Wave Plasma Investigation (RPWI) consortium which has been selected by European Space Agency (ESA) on the nest planetary mission JJUpiter ICy moons Exploer (JUICE) for a launch in 2022. The goals are to explore Jupiter and its potentially habitable icy moons and to study its plasma environment. Impedance probes, which are well known in geophysical prospection, in particular for ground permittivity investigations, have been successfully transposed to space plasmas diagnostic. Transmitting and receiving electrodes are used for measuring on open circuit the dynamic impedance of the system at several fixed frequencies over a range that includes characteristic frequencies of the ambient plasma. The measurements are then interpreted using a suitable theory and the values of plasma parameters, such as the electron density and possibly the temperature of the plasma can be deduced. To show how powerful this technique is, results obtained in the Earth's plasmasphere by the mutual impedance probe onboard ROSETTA are presented as example. MIME instrument proposal is then described and its ability to make valuable measurements in the Jupiter space environment and in particular around Europe, Callisto and Ganymede is investigated..

  6. Effect of gamma irradiation on storability of strawberry (Fragaria sp)

    Energy Technology Data Exchange (ETDEWEB)

    Al-Bachir, M; Farah, S [Atomic Energy Commission, Dept. of Agriculture, Damascus (Syrian Arab Republic)

    1998-02-01

    Despite the increased production of strawberry in Syria, the storability and marketability of fruits were not well studied. The objectives of this study were to investigate the effect of gamma irradiation on storability of Senga sengana strawberry produced in Syria and the effect of gamma irradiation on fungal sp. i.e. Botrytis; Penicillium; Rhizopus. The fruits were treated with 1 , 2 and 3 KGy of gamma rays. Treated and untreated fruits were stored at 2 to 4 centigrade and 80 to 90 % relative humidity (RH). In order to investigate their marketability, the fruits where held at room temperature (25 to 30 centigrade). Weight loss, microbial decay, and total loss, juice production, pH, total soluble solids of the juice and organoleptic qualities were evaluated throughout the different storage and marketing periods. The results indicate that gamma irradiation decreased the microbial decay and increased the storability and marketability of fruits by 50 and 100% after using 2 and 3 kGy, respectively. D10 were 1.8 and 2.4 for Botrytis and Rhizopus respectively. One day after irradiation total soluble solids and its pH values were increased. Fourteen days later, irradiated fruits produced more juice with higher pH, but total soluble solids were less. Gamma irradiation did not have an effect on aroma and colour of fruits, whereas, 3 kGy of gamma irradiation had an adverse negative effect on taste. (author)

  7. fruit juice

    African Journals Online (AJOL)

    Femi Olorunniji

    2013-08-31

    Aug 31, 2013 ... The soursop juice without treatment (T1) was used as the control while others in .... The fruits were washed carefully under flowing tap water, peeled, cut .... hygiene, pre and post harvest wounds on processed fruits, and the ...

  8. Elemental composition of strawberry plants inoculated with the plant growth-promoting bacterium Azospirillum brasilense REC3, assessed with scanning electron microscopy and energy dispersive X-ray analysis.

    Science.gov (United States)

    Guerrero-Molina, M F; Lovaisa, N C; Salazar, S M; Díaz-Ricci, J C; Pedraza, R O

    2014-07-01

    The elemental composition of strawberry plants (Fragaria ananassa cv. Macarena) inoculated with the plant growth-promoting bacterium Azospirillum brasilense REC3, and non-inoculated controls, was studied using scanning electron microscopy (SEM) and energy dispersive X-ray (EDS) analysis. This allowed simultaneous semi-quantification of different elements in a small, solid sample. Plants were inoculated and grown hydroponically in 50% or 100% Hoagland solution, corresponding to limited or optimum nutrient medium, respectively. Bacteria-inoculated plants increased the growth index 45% and 80% compared to controls when grown in 100% and 50% Hoagland solution, respectively. Thus, inoculation with A. brasilense REC3 in a nutrient-limited medium had the strongest effect in terms of increasing both shoot and root biomass and growth index, as already described for Azospirillum inoculated into nutrient-poor soils. SEM-EDS spectra and maps showed the elemental composition and relative distribution of nutrients in strawberry tissues. Leaves contained C, O, N, Na, P, K, Ca and Cu, while roots also had Si and Cl. The organic fraction (C, O and N) accounted for over 96.3% of the total chemical composition; of the mineral fraction, Na had higher accumulation in both leaves and roots. Azospirillum-inoculated and control plants had similar elemental quantities; however, in bacteria-inoculated roots, P was significantly increased (34.33%), which constitutes a major benefit for plant nutrition, while Cu content decreased (35.16%). © 2013 German Botanical Society and The Royal Botanical Society of the Netherlands.

  9. Strawberry radurisation on a commercial scale

    International Nuclear Information System (INIS)

    Du Venhage, C.A.

    1985-01-01

    An international breakthrough was made at Pelindaba in 1981 when laboratory experiments were adjusted to accomodate commercial quantities of strawberries. Theory and practise of the radurisation of strawberries become compatible and led to the successful marketing of 1,6 million punnets of radurised strawberries during the period 1981 to 1984. Several benefits are derived from this technology, making the marketing and distribution of radurised strawberries an accepted and on-going process

  10. Halogenated pesticide analysis in orange juice by gas chromatography with electron capture detector (GC-ECD) with "6"3Ni nuclide

    International Nuclear Information System (INIS)

    Manhani, Kelly C.; Amaral, Priscila O.; Bustillos, José O.V.; Mendes, Cristiana de A.; Lacerda, João P.A. de; Silva, Jorge L. da; Instituto de Pesquisas Tecnológicas do Estado de São Paulo

    2017-01-01

    Brazil has been gain space in the market of orange juice in the last years. For the exportation of this product to keep growing, its quality of this product must be ensured by putting in force more strict legislations and custom barriers, in order to improve the well-being and health of the population. In this work were analyzed four orange juices brands produced in the State of São Paulo. It was quantified the acaricide known as Dicofol (2,2,2-trichloro-1,1-bis(4-chlorophenyl) ethanol) widely used to combat the Citrusleprosis virus, transmitted by mites to the citrus culture. This pesticide was chosen due to its importance in the production of orange in large scale and their indiscriminate use may pose risks to humans and of environment. The analytical technique applied was gas chromatography coupled with electron capture detector (GC-ECD) using the "6"3Ni nuclide. This beta (β) radiation source ionizes the carrier gas (N_2), generating an electron current that forms the baseline. The analites pass through the detector and capture electrons, generating the analytical signal that is proportional to the concentration of analite. The sample preparation was done by QuEChERS. The limits of detection (LOD) and quantification (LOQ) found were 0.005 and 0.025 mg kg"-"1 respectively. The applied methodology was efficient and presented excellent analytical sensitivity for the pesticide Dicofol, being that of four samples analyzed, only in one was found concentration of 0.03 mg kg"-"1, above the LOQ, however below the Maximum Residue Limit (MRL) for fruits (0.1 mg kg"-"1) established by Codex alimentarius. (author)

  11. Halogenated pesticide analysis in orange juice by gas chromatography with electron capture detector (GC-ECD) with {sup 63}Ni nuclide

    Energy Technology Data Exchange (ETDEWEB)

    Manhani, Kelly C.; Amaral, Priscila O.; Bustillos, José O.V.; Mendes, Cristiana de A.; Lacerda, João P.A. de; Silva, Jorge L. da, E-mail: ovega@ipen.br, E-mail: kmanhani@gmail.com [Instituto de Pesquisas Energeticas e Nucleares (CQMA/IPEN-CNEN-SP), Sao Paulo, SP (Brazil). Centro de Química e Meio Ambiente; Instituto de Pesquisas Tecnológicas do Estado de São Paulo (LAQ- CQuim/IPT-SP), SP (Brazil). Lab. de Análises Químicas

    2017-11-01

    Brazil has been gain space in the market of orange juice in the last years. For the exportation of this product to keep growing, its quality of this product must be ensured by putting in force more strict legislations and custom barriers, in order to improve the well-being and health of the population. In this work were analyzed four orange juices brands produced in the State of São Paulo. It was quantified the acaricide known as Dicofol (2,2,2-trichloro-1,1-bis(4-chlorophenyl) ethanol) widely used to combat the Citrusleprosis virus, transmitted by mites to the citrus culture. This pesticide was chosen due to its importance in the production of orange in large scale and their indiscriminate use may pose risks to humans and of environment. The analytical technique applied was gas chromatography coupled with electron capture detector (GC-ECD) using the {sup 63}Ni nuclide. This beta (β) radiation source ionizes the carrier gas (N{sub 2}), generating an electron current that forms the baseline. The analites pass through the detector and capture electrons, generating the analytical signal that is proportional to the concentration of analite. The sample preparation was done by QuEChERS. The limits of detection (LOD) and quantification (LOQ) found were 0.005 and 0.025 mg kg{sup -1} respectively. The applied methodology was efficient and presented excellent analytical sensitivity for the pesticide Dicofol, being that of four samples analyzed, only in one was found concentration of 0.03 mg kg{sup -1}, above the LOQ, however below the Maximum Residue Limit (MRL) for fruits (0.1 mg kg{sup -1}) established by Codex alimentarius. (author)

  12. Biological control of tortricids and aphids in strawberries

    DEFF Research Database (Denmark)

    Sigsgaard, Lene; Enkegaard, Annie; Eilenberg, Jørgen

    Cropping practice and biological control can contribute to reduced pesticide use in strawberries. Organic strawberries are less attacked by strawberry tortricid and buckwheat flower strips can augment its natural enemies. Against shallot aphid the two-spot ladybird is promising....

  13. Enhancement of antioxidant activity and physicochemical properties of yogurt enriched with concentrated strawberry pulp obtained by block freeze concentration.

    Science.gov (United States)

    Jaster, Henrique; Arend, Giordana Demaman; Rezzadori, Katia; Chaves, Vitor Clasen; Reginatto, Flávio Henrique; Petrus, José Carlos Cunha

    2018-02-01

    Strawberry juice was concentrated using block freeze concentration process. The concentrate was used to produce two yogurts with different concentrations of cryoconcentrated strawberry pulp (15% and 30%). Total lactic acid bacteria count, physicochemical and rheological properties was evaluated during storage (7days) for all yogurts. Also, the beverages produced were compared with two commercial trademarks. It was observed that the total lactic acid bacteria count remained higher than 10 8 CFU·mL -1 during the storage time for all beverages studied. The viscosity of the yogurts decreased when the ratio of strawberry cryoconcentrate was increased. The Power Law model was successfully applied to describe the flow of the yogurts, which had a thixotropic behaviour. The incorporation of the cryoconcentrated strawberry pulp in the yogurt resulted in a product with 3-fold more anthocyanins content and antioxidant activity. The enrichment of natural yogurt with strawberry cryoconcentrated pulp proved to be effective in the production of a beverage with higher nutritional characteristics. Copyright © 2017 Elsevier Ltd. All rights reserved.

  14. Vapors produced by electronic cigarettes and e-juices with flavorings induce toxicity, oxidative stress, and inflammatory response in lung epithelial cells and in mouse lung.

    Directory of Open Access Journals (Sweden)

    Chad A Lerner

    Full Text Available Oxidative stress and inflammatory response are the key events in the pathogenesis of chronic airway diseases. The consumption of electronic cigarettes (e-cigs with a variety of e-liquids/e-juices is alarmingly increasing without the unrealized potential harmful health effects. We hypothesized that electronic nicotine delivery systems (ENDS/e-cigs pose health concerns due to oxidative toxicity and inflammatory response in lung cells exposed to their aerosols. The aerosols produced by vaporizing ENDS e-liquids exhibit oxidant reactivity suggesting oxidants or reactive oxygen species (OX/ROS may be inhaled directly into the lung during a "vaping" session. These OX/ROS are generated through activation of the heating element which is affected by heating element status (new versus used, and occurs during the process of e-liquid vaporization. Unvaporized e-liquids were oxidative in a manner dependent on flavor additives, while flavors containing sweet or fruit flavors were stronger oxidizers than tobacco flavors. In light of OX/ROS generated in ENDS e-liquids and aerosols, the effects of ENDS aerosols on tissues and cells of the lung were measured. Exposure of human airway epithelial cells (H292 in an air-liquid interface to ENDS aerosols from a popular device resulted in increased secretion of inflammatory cytokines, such as IL-6 and IL-8. Furthermore, human lung fibroblasts exhibited stress and morphological change in response to treatment with ENDS/e-liquids. These cells also secrete increased IL-8 in response to a cinnamon flavored e-liquid and are susceptible to loss of cell viability by ENDS e-liquids. Finally, exposure of wild type C57BL/6J mice to aerosols produced from a popular e-cig increase pro-inflammatory cytokines and diminished lung glutathione levels which are critical in maintaining cellular redox balance. Thus, exposure to e-cig aerosols/juices incurs measurable oxidative and inflammatory responses in lung cells and tissues that

  15. Strawberry polyphenols attenuate ethanol-induced gastric lesions in rats by activation of antioxidant enzymes and attenuation of MDA increase.

    Directory of Open Access Journals (Sweden)

    José M Alvarez-Suarez

    Full Text Available BACKGROUND AND AIM: Free radicals are implicated in the aetiology of gastrointestinal disorders such as gastric ulcer, colorectal cancer and inflammatory bowel disease. Strawberries are common and important fruit due to their high content of essential nutrient and beneficial phytochemicals which seem to have relevant biological activity on human health. In the present study we investigated the antioxidant and protective effects of three strawberry extracts against ethanol-induced gastric mucosa damage in an experimental in vivo model and to test whether strawberry extracts affect antioxidant enzyme activities in gastric mucosa. METHODS/PRINCIPAL FINDINGS: Strawberry extracts were obtained from Adria, Sveva and Alba cultivars. Total antioxidant capacity and radical scavenging capacity were performed by TEAC, ORAC and electron paramagnetic resonance assays. Identification and quantification of anthocyanins was carried out by HPLC-DAD-MS analyses. Different groups of animals received 40 mg/day/kg body weight of strawberry crude extracts for 10 days. Gastric damage was induced by ethanol. The ulcer index was calculated together with the determination of catalase and SOD activities and MDA contents. Strawberry extracts are rich in anthocyanins and present important antioxidant capacity. Ethanol caused severe gastric damage and strawberry consumption protected against its deleterious role. Antioxidant enzyme activities increased significantly after strawberry extract intake and a concomitantly decrease in gastric lipid peroxidation was found. A significant correlation between total anthocyanin content and percent of inhibition of ulcer index was also found. CONCLUSIONS: Strawberry extracts prevented exogenous ethanol-induced damage to rats' gastric mucosa. These effects seem to be associated with the antioxidant activity and phenolic content in the extract as well as with the capacity of promoting the action of antioxidant enzymes. A diet rich in

  16. Strawberry Polyphenols Attenuate Ethanol-Induced Gastric Lesions in Rats by Activation of Antioxidant Enzymes and Attenuation of MDA Increase

    Science.gov (United States)

    Alvarez-Suarez, José M.; Dekanski, Dragana; Ristić, Slavica; Radonjić, Nevena V.; Petronijević, Nataša D.; Giampieri, Francesca; Astolfi, Paola; González-Paramás, Ana M.; Santos-Buelga, Celestino; Tulipani, Sara; Quiles, José L.; Mezzetti, Bruno; Battino, Maurizio

    2011-01-01

    Background and Aim Free radicals are implicated in the aetiology of gastrointestinal disorders such as gastric ulcer, colorectal cancer and inflammatory bowel disease. Strawberries are common and important fruit due to their high content of essential nutrient and beneficial phytochemicals which seem to have relevant biological activity on human health. In the present study we investigated the antioxidant and protective effects of three strawberry extracts against ethanol-induced gastric mucosa damage in an experimental in vivo model and to test whether strawberry extracts affect antioxidant enzyme activities in gastric mucosa. Methods/Principal Findings Strawberry extracts were obtained from Adria, Sveva and Alba cultivars. Total antioxidant capacity and radical scavenging capacity were performed by TEAC, ORAC and electron paramagnetic resonance assays. Identification and quantification of anthocyanins was carried out by HPLC-DAD-MS analyses. Different groups of animals received 40 mg/day/kg body weight of strawberry crude extracts for 10 days. Gastric damage was induced by ethanol. The ulcer index was calculated together with the determination of catalase and SOD activities and MDA contents. Strawberry extracts are rich in anthocyanins and present important antioxidant capacity. Ethanol caused severe gastric damage and strawberry consumption protected against its deleterious role. Antioxidant enzyme activities increased significantly after strawberry extract intake and a concomitantly decrease in gastric lipid peroxidation was found. A significant correlation between total anthocyanin content and percent of inhibition of ulcer index was also found. Conclusions Strawberry extracts prevented exogenous ethanol-induced damage to rats' gastric mucosa. These effects seem to be associated with the antioxidant activity and phenolic content in the extract as well as with the capacity of promoting the action of antioxidant enzymes. A diet rich in strawberries might exert a

  17. Storage of irradiated strawberry fruits

    International Nuclear Information System (INIS)

    Popova, L.

    1977-01-01

    Pocahontas strawberries both of green house and field production have been stored at 3 deg C for 10 and 12 days, respectively, after treatment with 100000, 200000 and 300000 Roe in comparison with unirradiated fruits. No explicit correlation was observed regarding the keeping qualities of fruits, their chemical composition (dry matter, sugars, acids and vitamin C) when stored after a different gamma-ray irradiation. (S.P.)

  18. Morphological and mineral analysis of dental enamel after erosive challenge in gastric juice and orange juice.

    Science.gov (United States)

    Braga, Sheila Regina Maia; De Faria, Dalva Lúcia Araújo; De Oliveira, Elisabeth; Sobral, Maria Angela Pita

    2011-12-01

    This study evaluated and compared in vitro the morphology and mineral composition of dental enamel after erosive challenge in gastric juice and orange juice. Human enamel specimens were submitted to erosive challenge using gastric juice (from endoscopy exam) (n = 10), and orange juice (commercially-available) (n = 10), as follows: 5 min in 3 mL of demineralization solution, rinse with distilled water, and store in artificial saliva for 3 h. This cycle was repeated four times a day for 14 days. Calcium (Ca) loss after acid exposure was determined by atomic emission spectroscopy. The presence of carbonate (CO) and phosphate (PO) in the specimens was evaluated before and after the erosive challenge by FT-Raman spectroscopy. Data were tested using t-tests (P enamel was observed in scanning electron microscopy (SEM). The mean loss of Ca was: 12.74 ± 3.33 mg/L Ca (gastric juice) and 7.07 ± 1.44 mg/L Ca (orange juice). The analysis by atomic emission spectroscopy showed statistically significant difference between erosive potential of juices (P = 0.0003). FT-Raman spectroscopy found no statistically significant difference in the ratio CO/PO after the erosive challenge. The CO/PO ratios values before and after the challenge were: 0.16/0.17 (gastric juice) (P = 0.37) and 0.18/0.14 (orange juice) (P = 0.16). Qualitative analysis by SEM showed intense alterations of enamel surface. The gastric juice caused more changes in morphology and mineral composition of dental enamel than orange juice. The atomic emission spectroscopy showed to be more suitable to analyze small mineral loss after erosive challenge than FT-Raman. Copyright © 2011 Wiley Periodicals, Inc.

  19. Effect of different planting time on different varieties of strawberries

    Science.gov (United States)

    Zhong, Yue; Luo, Ya; Ge, Cong; Mo, Qin; Lin, Yajie; Luo, Shu; Tang, Haoru

    2018-04-01

    The experiment chose two strawberry varieties which planted in two periods of September 10 and September 20, in order to identify the optimum planting time of strawberries by exploring the effects of different planting time on strawberry quality and flowering initially. The results showed that different planting time will affect the growth and quality of strawberry, and the quality of September 10 planting strawberries is better than September 20 planting strawberries while there do exist some differences between strawberry varieties. In summary, the preliminary determination is that in Hanyuan area, the Hong Yan and Zhang Ji's optimum planting time is 10 September.

  20. Order of 29 December 1988 on treatment of strawberries by ionizing radiation

    International Nuclear Information System (INIS)

    1989-01-01

    This order specifies the conditions for authorizing with a view to selling or putting on sale strawberries whose preservation has been obtained through exposure to cobalt 60 or caesium 137 radiation or to electron beams with an energy below or equal to 10 million electron-volts (10 MeV). (NEA) [fr

  1. Conservation by irradiation of the cooled strawberries

    International Nuclear Information System (INIS)

    Kaabi, Olfa

    2004-01-01

    During this work, the microbiological, physicochemical and organoleptic effects of the irradiation were studied throughout the strawberries conservation at 4 0 C in camarosa variety. Thus, the optimal dose was measured. The experimental results showed that the ionizing treatment causes a notable reduction of the microbial flora (total yeasts and moulds, psychrotrophes germs) of the strawberry. This reduction can exceed the 90% of the total flora in the strawberries treated with 2.5 and 3 KGy. The microbial load remained no significant for the strawberries treated with 2, 2.5 and 3 KGy until the 21 2nd day of the conservation. On the organoleptic level, the gustatory quality of the strawberries irradiated by 2 and 2.5 KGy is acceptable, whereas the control strawberries exposed at 3 KGy are acceptable. Moreover, the effect of the irradiation on the physico-chemical parameters is significant only in the case of the ascorbic acid which notes a considerable reduction in the vitamin during the first days of conservation, but which will be moderated after 8 2nd days of the storage cutters irradiated. This degradation remained more accelerated in the case of control strawberries. Lastly, we can affirm that the irradiation increases the shelf life without making modifications sensitive to the original characteristics of the cutter, which constitutes a reliable process and inexpensive in energy. (author). 13 refs

  2. Preparation of micro-encapsulated strawberry fragrance and its application in the aromatic wallpaper

    Directory of Open Access Journals (Sweden)

    Xiao Zuobing

    2017-03-01

    Full Text Available Micro-encapsulated strawberry fragrance was successfully prepared with wall materials including maltodextrin, sodium octenylsuccinate and gum Arabic. The micro-capsule was added to wallpaper and aromatic wallpaper with strawberry characteristics was obtained. The particle distribution, surface morphology, chemical structure, thermal property and controlled release performance of micro-encapsulated fragrance and aromatic wallpaper were investigated using laser particle size analyzer, scanning electron microscopy (SEM, Fourier transform infrared spectroscopy (FT-TR, thermal gravity analysis (TGA and chromatography-mass spectrometer (GC-MS. The results showed that the average diameter of micro-capsule was 2 μm and the particles mainly distributed in the tissues of wallpaper. The result of TGA showed that the micro-capsule had a good stability. Meanwhile, the aromatic wallpaper had strawberry aroma more than 3 months and took on excellent controlled release performance.

  3. Volatile, anthocyanidin, quality and sensory changes in rabbiteye blueberry from whole fruit through pilot plant juice processing.

    Science.gov (United States)

    Beaulieu, John C; Stein-Chisholm, Rebecca E; Lloyd, Steven W; Bett-Garber, Karen L; Grimm, Casey C; Watson, Michael A; Lea, Jeanne M

    2017-01-01

    High antioxidant content and keen marketing have increased blueberry demand and increased local production which in turn mandates new uses for abundant harvests. Pilot scale processes were employed to investigate the anthocyanidin profiles, qualitative volatile compositions, and sensorial attributes in not-from-concentrate (NFC) 'Tifblue' rabbiteye blueberry juices. Processing prior to pasteurization generally resulted in increased L * and hue angle color, while a * , b * , and C * decreased. After 4 months pasteurized storage, non-clarified juice (NCP) lost 73.8% of total volatiles compared with 70.9% in clarified juice (CJP). There was a total anthocyanidin decrease of 84.5% and 85.5% after 4 months storage in NCP and CJP, respectively. Storage itself resulted in only 14.2% and 7.2% anthocyanidin loss after pasteurization in NCP and CJP. Storage significantly affected nine flavor properties in juices; however, there were no significant differences in the blueberry, strawberry, purple grape, floral, sweet aroma, or sweet tastes between processed and stored juices. NFC pasteurized blueberry juices maintained desirable flavors even though highly significant volatile and anthocyanidin losses occurred through processing. Maintenance of color and flavor indicate that NFC juices could have an advantage over more abusive methods often used in commercial juice operations. © 2016 Society of Chemical Industry. © 2016 Society of Chemical Industry.

  4. The complete genome sequence of a new polerovirus in strawberry plants from eastern Canada showing strawberry decline symptoms.

    Science.gov (United States)

    Xiang, Yu; Bernardy, Mike; Bhagwat, Basdeo; Wiersma, Paul A; DeYoung, Robyn; Bouthillier, Michel

    2015-02-01

    Strawberry decline disease, probably caused by synergistic reactions of mixed virus infections, threatens the North American strawberry industry. Deep sequencing of strawberry plant samples from eastern Canada resulted in the identification of a new virus genome resembling poleroviruses in sequence and genome structure. Phylogenetic analysis suggests that it is a new member of the genus Polerovirus, family Luteoviridae. The virus is tentatively named "strawberry polerovirus 1" (SPV1).

  5. Effectiveness of UV-C light assisted by mild heat on Saccharomyces cerevisiae KE 162 inactivation in carrot-orange juice blend studied by flow cytometry and transmission electron microscopy.

    Science.gov (United States)

    García Carrillo, Mercedes; Ferrario, Mariana; Guerrero, Sandra

    2018-08-01

    The aim of this study was to analyze the effectiveness of UV-C light (0-10.6 kJ/m 2 ) assisted by mild heat treatment (50 °C) on the inactivation of Saccharomyces cerevisiae KE 162 in peptone water and fresh carrot-orange juice blend (pH: 3.8; 9.8°Brix; 707 NTU; absorption coefficient: 0.17 cm -1 ). Yeast induced damage by single UV-C and mild heat (H) and the combined treatment UV-C/H, was investigated by flow cytometry (FC) and transmission electron microscopy (TEM). When studying induced damage by FC, cells were labeled with fluorescein diacetate (FDA) and propidium iodide (PI) to monitor membrane integrity and esterase activity. UV-C/H provoked up to 4.7 log-reductions of S. cerevisiae; whereas, only 2.6-3.3 log-reductions were achieved by single UV-C and H treatments. FC revealed a shift with treatment time from cells with esterase activity and intact membrane to cells with permeabilized membrane. This shift was more noticeable in peptone water and UV-C/H treated juice. In the UV-C treated juice, double stained cells were detected, suggesting the possibility of being sub-lethally damaged, with compromised membrane but still metabolically active. TEM images of treated cells revealed severe damage, encompassing coagulated inner content, disorganized lumen and cell debris. FC and TEM provided additional information regarding degree and type of damage, complementing information revealed by the traditional plate count technique. Copyright © 2018 Elsevier Ltd. All rights reserved.

  6. Bioinformatic Analysis of Strawberry GSTF12 Gene

    Science.gov (United States)

    Wang, Xiran; Jiang, Leiyu; Tang, Haoru

    2018-01-01

    GSTF12 has always been known as a key factor of proanthocyanins accumulate in plant testa. Through bioinformatics analysis of the nucleotide and encoded protein sequence of GSTF12, it is more advantageous to the study of genes related to anthocyanin biosynthesis accumulation pathway. Therefore, we chosen GSTF12 gene of 11 kinds species, downloaded their nucleotide and protein sequence from NCBI as the research object, found strawberry GSTF12 gene via bioinformation analyse, constructed phylogenetic tree. At the same time, we analysed the strawberry GSTF12 gene of physical and chemical properties and its protein structure and so on. The phylogenetic tree showed that Strawberry and petunia were closest relative. By the protein prediction, we found that the protein owed one proper signal peptide without obvious transmembrane regions.

  7. Shallot aphids, Myzus ascalonicus, in strawberry

    DEFF Research Database (Denmark)

    Enkegaard, Annie; Sigsgaard, Lene; Kristensen, Kristian

    2013-01-01

    The parasitization capacity of 3 parasitoids and the predation capacity of 3 predators towards the shallot aphid, Myzus ascalonicus Doncaster (Homoptera: Aphididae), on strawberry, Fragaria x ananassa Duchesne (Rosales: Rosaceae) cv. Honeoye, were examined in laboratory experiments. In Petri dish...... other parasitoid-induced causes. However, the host feeding rate was reduced to only 1.2 ± 0.8%, and no significant parasitization mortality was observed on strawberry plants, suggesting that host plants interfered with A. abdominalis activity. This parasitoid does not, therefore, seem to be suited...... to either inoculative or inundative biocontrol of shallot aphids in strawberry. The three predators studied were the green lacewing, Chrysoperla carnea Steph. (Neuroptera: Chrysopi-dae), the two-spotted lady beetle, Adalia bipunctata L. (Coleoptera: Coccinellidae), and the gall midge Aphidoletes aphidimyza...

  8. Sweet, red and Danish: New strawberry varieties on their way

    DEFF Research Database (Denmark)

    Stacey, Julia; Fjord, Thomas Ahle

    2000-01-01

    A strawberry isn't just a strawberry. Some are sweeter than others, more fragrant and juicier. It is therefore a difficult task to develop a strawberry that tastes like in childhood memories of endless sunny days, and which also is suitablefor the distribution system of today. But new varieties...... are on their way. And this time consumers have participated in the development process. The new strawberry varieties are the result of extensive product development in the research project 'Better Danish strawberries' in which the Danish Institute of Agricultural Science, Danish Fruit Growers' Association......, the Danish Veterinary and Food Administration and MAPP participated. Danish strawberry growers initiated the project and the purpose is to assure the quality of strawberries and to improve the distribution and sale. In order to get consumers to evaluate both new and existing varieties the MAPP Centre carried...

  9. Quality of fresh-cut strawberry

    OpenAIRE

    Costa,Franciscleudo B; Duarte,Priscila S; Puschmann,Rolf; Finger,Fernando L

    2011-01-01

    The aim of this work was to study the physical, chemical, physiological and microbiological changes during the flow chart of fresh-cut strawberry. Strawberry cvs. Camarosa, Dover and Tudla, derived from experimental area of the Universidade Federal de Viçosa, were selected by color (red ¾) and absence of wound. Afterwards, the minimal processing was evaluated, as follows: fast cooling, water and ice, removal of the calyx followed by conservation at 5±0.5°C and 90-95% RH for 13 days, sanitatio...

  10. Composition of apple juice.

    Science.gov (United States)

    Mattick, L R; Moyer, J C

    1983-09-01

    Thirty-one samples from 8 geographic growing regions of the United States and 15 varieties common to these areas were converted to apple juice and analyzed for their attributes over the 3 year period 1979, 1980, and 1981. The total of 93 samples were analyzed for ash, brix, pH, proline, specific gravity, total acid, sorbitol, sucrose, fructose, and glucose. The elements cadmium, calcium, iron, lead, phosphorus, potassium, sodium, and zinc were also determined. These data are presented to serve as a data base for the detection of fraudulent or adulterated apple juice.

  11. Radiation preservation of strawberry fruit: a review

    International Nuclear Information System (INIS)

    Quaranta, H.O.; Piccini, J.L.

    1984-01-01

    This paper reviews the up-to-date literature on strawberry fruit preservation by irradiation, including microbiological and nutritional aspects, as well as chemical alterations in its components through analysis of vitamin content, carbohydrates, amino acids and fatty acids present, estimation of content of volatiles, and influence of irradiation on shelf-life and appearance. (author)

  12. Sensation™ ‘Florida 127’ Strawberry

    Science.gov (United States)

    ‘Florida127’ strawberry originated from a 2009 cross between Winterstar™ ‘FL 05-107’ (female parent) and unreleased selection FL 02-58 (male parent). It is a short-day genotype adapted to an annual plasticulture growing system. The plant is upright with open architecture, allowing air movement and e...

  13. Prunus fruit juices

    NARCIS (Netherlands)

    Toydemir, Gamze; Boyacioglu, Dilek; Hall, R.D.; Beekwilder, M.J.; Capanoglu, Esra

    2017-01-01

    The juice drinks obtained from Prunus fruit species, apricot (Prunus armeniaca), cherry (sweet cherry (Prunus avium) and sour cherry (Prunus cerasus)), peach (Prunus persica), and plum (Prunus domestica), are gaining increasing interest as a convenient alternative to fresh fruits. The conventional

  14. Management of Soilborne Diseases in Strawberry Using Vegetable Rotations

    OpenAIRE

    Subbarao, Krishna V

    2007-01-01

    The influence of crop rotation on soilborne diseases and yield of strawberry (Fragaria × ananassa) was determined at a site infested with Verticillium dahliae microsclerotia and at another with no known history of V. dahliae infestation during 1997 to 2000. The rotations studied at the V. dahliae-infested site were (i) broccoli-broccoli-strawberry, (ii) Brussels sproutsstrawberry, and (iii) lettuce-lettuce-strawberry; the treatments at the site with no history of V. dahliae were (i) broccoli-...

  15. Quality consumption of strawberries (Fragaria ananassa

    Directory of Open Access Journals (Sweden)

    Sergio Carballo

    2011-04-01

    Full Text Available Consumers increasingly require a food product that preserves their nutritional value; retain fresh colour, flavour and texture.Appearance, texture and flavour are attributes identified as to be key to acceptability of fruit and also for consumers in making purchase of fresh produce.The objective of this work was to investigate the consumer's preference of sensory quality and the commercial aspects of fresh strawberries, harvested in spring time from the south of our country, Uruguay- South America.In this study, seven different strawberries varieties (INIA-Arazá, INIA- Ivapitá, Ventana, Seascape, Camarosa, INIA- Ivahé, Aromas were sensory and physicochemical evaluated.The results obtained showed a high correlation between total soluble solids and sensory attributes (colour, texture, and flavour.Camarosa and Ivahé varieties were prefered for the external and internal aspects of the fruit.Future work should investigate other producer areas of the country and other harvesting time.

  16. Effects of Insecticides on Strawberry Aphid Chaetosiphon fragaefolii (Cockerell on Resistant and Susceptible Strawberry Genotypes

    Directory of Open Access Journals (Sweden)

    Slobodan Milenković

    2011-01-01

    Full Text Available Strawberry aphid, Chaetosiphon fragaefolii (Cockerell, is the most important vector ofstrawberry virus. Breeding of genotypes resistant to this pest is an important preventivecontrol measure, which can be compatible with rational insecticide application. The aimof the paper was to determine effects of dimethoate and deltamethrin on C. fragaefoliipopulations reared on two strawberry genotypes different in susceptibility: susceptiblestrawberry cultivar Čačanska rana and medium resistant hybrid, zf/1/94/96 (Senga Fructarinax Del Norte. Lower toxicity of deltamethrin was observed (laboratory assay as well aslower biological efficacy of dimethoate at lower concentrations (field trial for specimensfrom C. fragaefolii population reared on susceptible strawberry cultivar Čačanska rana.

  17. Are Fruit Juice Categories Separable?

    OpenAIRE

    Knight, Erika P.; House, Lisa; Lee, Jonq-Ying; Spreen, Thomas H.

    2008-01-01

    Supermarket shelves are saturated with numerous varieties and brands of juice beverages. This high level of assortment has dramatically changed beverage consumption patterns and trends throughout the United States. In fact, during 2004-2005, energy and sport drinks experienced significant increases in sales, 65.9% and 20.6 %, respectively. During the same period of time, refrigerated juice sales increased a mere 2.2%, shelved non-fruit drinks decreased 0.9%, bottled juices and cocktails both ...

  18. Effect of irradiation on fresh-keeping of strawberry stored at room temperature

    International Nuclear Information System (INIS)

    Zhao Yongfu; Xie Zongchuan; Lu Zhaoxin

    1999-01-01

    The fresh keeping period of strawberry irradiated with 4.0 kGy dose and stored at room temperature was prolonged to 6 days. Further experiment showed that the irradiation treatment decreased the number of mold in strawberry by two orders of magnitude, inhibited the strawberry fruit respiration and water loss, therefore, improved the effect of strawberry fresh-keeping

  19. Strawberry Production in Soilless Substrate Troughs – Plant Growth

    Science.gov (United States)

    Soilless substrates made of peat moss, coconut coir, perlite, rockwool or bark are pathogen free and they have been used in strawberry production in Europe in troughs or containers. Open field strawberry production in soilless substrate is new to California growers. The objective of this study was t...

  20. LED Light to improve Strawberry Flavour, Quality and Production

    NARCIS (Netherlands)

    Hanenberg, M.A.A.; Janse, J.; Verkerke, W.

    2016-01-01

    A current demonstration in the greenhouses of Wageningen UR in Bleiswijk (the Netherlands) shows positive results of LED light on the quality and production of strawberries (Fragaria x ananassa). In this demonstration two strawberry cultivars, Elsanta and Sonata, are exposed to three different light

  1. Evaluation of quality parameters of strawberry fruits in modified ...

    African Journals Online (AJOL)

    The objective of the present study is to evaluate the effect of modified atmosphere packaging (MAP) during storage on some quality parameters of strawberries. Strawberries (cv. Camarosa) were harvested when mature, forced air cooled and divided into two groups as fruits in MAP and control. After packaging, fruits were ...

  2. Evaluation of quality parameters of strawberry fruits in modified ...

    African Journals Online (AJOL)

    STORAGESEVER

    2009-03-06

    Mar 6, 2009 ... postharvest physiology of strawberry. In: Luby JJ, Dale A (Eds.), The. Strawberry into the 21th Century. Timber Press, Portland, OR, pp. 145-152. Kovach J, Petzoldt R, Harman GE (2000). Use honey bees and bumble bees to disseminate Trichoderma harzianum 1295-22 to straw- berries for botrytis control.

  3. Fruit Detachment and Classification Method for Strawberry Harvesting Robot

    Directory of Open Access Journals (Sweden)

    Guo Feng

    2008-11-01

    Full Text Available Fruit detachment and on-line classification is important for the development of harvesting robot. With the specific requriements of robot used for harvesting strawberries growing on the ground, a fruit detachment and classification method is introduced in this paper. OHTA color spaces based image segmentation algorithm is utilized to extract strawberry from background; Principal inertia axis of binary strawberry blob is calculated to give the pose information of fruit. Strawberry is picked selectively according to its ripeness and classified according to its shape feature. Histogram matching based method for fruit shape judgment is introduced firstly. Experiment results show that this method can achieve 93% accuracy of strawberry's stem detection, 90% above accuracy of ripeness and shape quality judgment on black and white background. With the improvement of harvesting mechanism design, this method has application potential in the field operation.

  4. Strawberry cultivation in Brazil | Cultivo de morangos no Brasil

    Directory of Open Access Journals (Sweden)

    José Machado

    2016-06-01

    Full Text Available The strawberry is cultivated in different regions of the world. Their cultivation have shown demand larger family hand labor and highly profitable.  The strawberry is a very old fruit. Wild species existed for more 50 million years, but the specie was tamed around the XIV century A.C.  There are various types of cultivation, among them stand out traditional cultivation and organic cultivation. The more important factors affecting the strawberries are climate, pests and diseases. Know the types of cultivation and strawberry it is important for decision making in the future, such as use of lichens in cultivation. The aim of this work is to explain about conventional and organic agriculture with emphasis in lichens on strawberry crop to support scientific research in more depth character.> S

  5. Fruit Detachment and Classification Method for Strawberry Harvesting Robot

    Directory of Open Access Journals (Sweden)

    Guo Feng

    2008-03-01

    Full Text Available Fruit detachment and on-line classification is important for the development of harvesting robot. With the specific requriements of robot used for harvesting strawberries growing on the ground, a fruit detachment and classification method is introduced in this paper. OHTA color spaces based image segmentation algorithm is utilized to extract strawberry from background; Principal inertia axis of binary strawberry blob is calculated to give the pose information of fruit. Strawberry is picked selectively according to its ripeness and classified according to its shape feature. Histogram matching based method for fruit shape judgment is introduced firstly. Experiment results show that this method can achieve 93% accuracy of strawberry's stem detection, 90% above accuracy of ripeness and shape quality judgment on black and white background. With the improvement of harvesting mechanism design, this method has application potential in the field operation.

  6. Identification of gamma-irradiated fruit juices by EPR spectroscopy

    International Nuclear Information System (INIS)

    Aleksieva, K.I.; Dimov, K.G.; Yordanov, N.D.

    2014-01-01

    The results of electron paramagnetic resonance (EPR) study on commercially available juices from various fruits and different fruit contents: 25%, 40%, 50%, and 100%, homemade juices, nectars and concentrated fruit syrups, before and after gamma-irradiation are reported. In order to remove water from non- and irradiated samples all juices and nectars were filtered; the solid residue was washed with alcohol and dried at room temperature. Only concentrated fruit syrups were dried for 60 min at 40 °C in a standard laboratory oven. All samples under study show a singlet EPR line with g=2.0025 before irradiation with exception of concentrated fruit syrups, which are EPR silent. Irradiation of juice samples gives rise to complex EPR spectra which gradually transferred to “cellulose-like” EPR spectrum from 25% to 100% fruit content. Concentrated fruit syrups show typical “sugar-like“ spectra due to added saccharides. All EPR spectra are characteristic and can prove radiation treatment. The fading kinetics of radiation-induced EPR signals were studied for a period of 60 days after irradiation. - Highlights: • The EPR analysis of juices, nectars and syrups proves that the sample has been irradiated. • Two sample preparation procedures were used. • The stability of the radiation induced EPR signals was studied over 2 months. • Application of European standards can be extended for irradiated juices and syrups

  7. Solidago canadensis L. Essential Oil Vapor Effectively Inhibits Botrytis cinerea Growth and Preserves Postharvest Quality of Strawberry as a Food Model System.

    Science.gov (United States)

    Liu, Shumin; Shao, Xingfeng; Wei, Yanzhen; Li, Yonghua; Xu, Feng; Wang, Hongfei

    2016-01-01

    This study investigated the anti-fungal properties of Solidago canadensis L. essential oil (SCLEO) against Botrytis cinerea in vitro, and its ability to control gray mold and maintain quality in strawberry fruits. SCLEO exhibited dose-dependent antifungal activity against B. cinerea and profoundly altered mycelial morphology, cellular ultrastructure, and membrane permeability as evaluated by scanning electron microscopy, transmission electron microscopy, and fluorescence microscopy. SCLEO vapor at 0.1 mL/L maintained higher sensory acceptance and reduced decay of fresh strawberry fruit, and also reduced gray mold in artificially inoculated fruit. SCLEO treatment did not, however, stimulate phenylalanin ammonia-lyase, polyphenol oxidase, or chitinase, enzymes related to disease resistance. This suggests that SCLEO reduces gray mold by direct inhibition of pathogen growth. SCLEO vapor may provide a new and effective strategy for controlling postharvest disease and maintaining quality in strawberries.

  8. Solidago canadensis L essential oil vapor effectively inhibits Botrytis cinerea growth and preserves postharvest quality of strawberry as a food model system

    Directory of Open Access Journals (Sweden)

    Shumin Liu

    2016-08-01

    Full Text Available This study investigated the anti-fungal properties of Solidago canadensis L essential oil (SCLEO against Botrytis cinerea in vitro, and its ability to control gray mold and maintain quality in strawberry fruits. SCLEO exhibited dose-dependent antifungal activity against B. cinerea and profoundly altered mycelial morphology, cellular ultrastructure, and membrane permeability as evaluated by scanning electron microscopy, transmission electron microscopy, and fluorescence microscopy. SCLEO vapor at 0.1 mL/L maintained higher sensory acceptance and reduced decay of fresh strawberry fruit, and also reduced gray mold in artificially inoculated fruit. SCLEO treatment did not however, stimulate phenylalanin ammonia-lyase (PAL, polyphenol oxidase (POD, or chitinase (CHI, enzymes related to disease resistance. This suggests that SCLEO reduces gray mold by direct inhibition of pathogen growth. SCLEO vapor may provide a new and effective strategy for controlling postharvest disease and maintaining quality in strawberries.

  9. Organochlorine pesticide residues in strawberries from integrated pest management and organic farming.

    Science.gov (United States)

    Fernandes, Virginia C; Domingues, Valentina F; Mateus, Nuno; Delerue-Matos, Cristina

    2011-07-27

    A rapid, specific, and sensitive method based on the Quick Easy Cheap Effective Rugged and Safe (QuEChERS) method and a cleanup using dispersive solid-phase extraction with MgSO(4), PSA, and C18 sorbents has been developed for the routine analysis of 14 pesticides in strawberries. The analyses were performed by three different analytical methodologies: gas chromatography (GC) with electron capture detection (ECD), mass spectrometry (MS), and tandem mass spectrometry (MS/MS). The recoveries for all the pesticides studied were from 46 to 128%, with relative standard deviation of residue limits (MRL) accepted in Portugal for organochlorine pesticides (OCP). A survey study of strawberries produced in Portugal in the years 2009-2010 obtained from organic farming (OF) and integrated pest management (IPM) was developed. Lindane and β-endosulfan were detected above the MRL in OF and IPM. Other OCP (aldrin, o,p'-DDT and their metabolites, and methoxychlor) were found below the MRL. The OCP residues detected decreased from 2009 to 2010. The QuEChERS method was successfully applied to the analysis of strawberry samples.

  10. 21 CFR 146.135 - Orange juice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Orange juice. 146.135 Section 146.135 Food and....135 Orange juice. (a) Orange juice is the unfermented juice obtained from mature oranges of the... name of the food is “orange juice”. The name “orange juice” may be preceded on the label by the...

  11. Irradiation preservation processing study of strawberry

    International Nuclear Information System (INIS)

    Xu Shihong; Zhu Zhaodi

    1992-01-01

    Radiation preservation processing of strawberry was studied. The results show that single seal processing or combining with irradiation processing under given doses is of no practical value, but only combining with chill processing can promote lengthening period of fresh keeping. Single irradiation processing under given doses provides not only good initial state, but also the beginning of bad development at top speed on microorganism. The composite processing of irradiation, chill and seal can supply extended shelf lifetime with optimum value of dual synergetic effect

  12. Dipping Strawberry Plants in Fungicides before Planting to Control Anthracnose

    Directory of Open Access Journals (Sweden)

    Myeong Hyeon Nam

    2014-03-01

    Full Text Available Anthracnose crown rot (ACR, caused by Colletotrichum fructicola, is a serious disease of strawberry in Korea. The primary inoculums of ACR were symptomless strawberry plants, plant debris, and other host plants. To effectively control anthracnose in symptomless transplanted strawberries, it is necessary to use diseasefree plants, detect the disease early, and apply a fungicide. Therefore, in 2010 and 2011, we evaluated the efficacy of pre-plant fungicide dips by using strawberry transplants infected by C. fructicola for the control of anthracnose. Dipping plants in prochloraz-Mn for 10 min before planting was most effective for controlling anthracnose in symptomless strawberry plants and resulted in more than 76% control efficacy. Azoxystrobin showed a control efficacy of over 40%, but plants treated with pyraclostrobin, mancozeb and iminoctadine tris showed high disease severity. The control efficacy of the dip treatment with prochloraz-Mn did not differ with temperature and time. Treatment with prochloraz-Mn for more than an hour caused growth suppression in strawberry plants. Therefore, the development of anthracnose can be effectively reduced by dipping strawberry plants for 10 min in prochloraz-Mn before planting.

  13. Internationalization of Boost Juice to Malaysia

    OpenAIRE

    Jane L. Menzies; Stuart C. Orr

    2014-01-01

    This case describes the process that the Australian juice retail chain, Boost Juice, has used to internationalize to Malaysia. The main objective of this case is to demonstrate good practice in regard to internationalization. The case provides the background of the juice bar industry in Malaysia and determines that it is an attractive market for new start-up juice bars. An analysis of Boost Juice's capability determined that the company utilized the skills of its staff, product innovations, b...

  14. Comparison of the nutrient content of fresh fruit juices vs commercial fruit juices.

    Science.gov (United States)

    Densupsoontorn, Narumon; Jirapinyo, Pipop; Thamonsiri, Nuchnoi; Wongarn, Renu; Phosuya, Panarat; Tritiprat, Amornrat; Patraarat, Siriphan; Pidatcha, Pannee; Suwannthol, Lerson

    2002-08-01

    To compare the types and quantities of carbohydrate, electrolytes, pH and osmolarity of fresh fruit juices and commercial fruit juices. Forty kinds of fresh fruits available in Thai markets were analyzed for types and quantities of carbohydrate, electrolyte, pH and osmolarity and compared with previously obtained data for commercial fruit juices. Most fresh fruit juices did not contain sucrose, whereas, commercial fruit juices mostly have sucrose in the range of 3-112 g/L. Although both fruit juices were acidic (pH varied from 3.6-6.7 and 3.2-5.8 of fresh juice and commercial juice), fresh fruit juices had a more neutral pH than commercial fruit juices. Apple, guava, orange, pear, and pineapple juices from commercial fruit juices had a high osmolarity compared with fresh fruit juices. All types of fresh fruit juices contained less sodium than commercial ones, whereas, most fresh fruit juices contained more potassium, phosphorus, and magnesium than commercial fluids. The nutrient content of fresh fruit juices and commercial fruit juices from the same kinds of fruits are not the same, possibly due to the manufacturing process. Therefore, physicians should know the composition of fruit juices in order to advise patients properly.

  15. Waste materials derived bio-effectors used as growth promoters for strawberry plants. An agronomic and metabolomic study

    Science.gov (United States)

    Vasileva, Brankica; Chami, Ziad Al; De Pascali, Sandra; Cavoski, Ivana; Fanizzi, Francesco Paolo

    2015-04-01

    Recently, a novel concept of bio-effectors has emerged to describe a group of products that are able to improve plant performance more than fertilizers. In this study, three different agro-industrial residues, i.e. brewers' spent grain (BSG), fennel processing residues (FPR) and lemon processing residues (LPR) were chosen as potential bio-effectors. A greenhouse soilless pot experiment was conducted on strawberry plants (Fragaria x ananassa var. Festival) in order to study the effect of BSG, FPR and LPR water extracts, at different concentrations, on plant growth and fruit quality. Their effect was compared with humic-like substances as a positive/reference control (Ctrl+) and with Hoagland solution as a negative control (Ctrl-). Agronomic parameters and the nutrient uptake were measured on shoots, roots and fruits. Metabolomic profiling tests were carried out on leaves, roots and fruit juices through the NMR technique. Plants treated with the FPR extract showed better vegetative growth, while plants treated with the BSG extract gave higher yield and better fruit size. Metabolomic profiling showed that fruits and roots of plants treated with FPR and LPR extracts had higher concentrations of sucrose, malate and acetate, while BSG treated plants had higher concentrations of citrate and β-glucose. In conclusion, according to the results achieved, the bio-effectors used in this study promote plant growth and fruit quality regardless of their nutritional content. Keywords: bio-effectors, agro-industrial waste, nuclear magnetic resonance (NMR), strawberry, growth promotion, fruit quality.

  16. Strawberry Anthracnose Ripe Fruit Rot and Management Recommendations

    OpenAIRE

    Louws, Frank

    2009-01-01

    Briefly describes anthracnose symptoms on ripe strawberry fruit, then recommends ways to manage for the anthracnose, including removal and burying or burning infected and nearby plants, avoiding overhead irrigation, and picking fruits from the infected areas last.

  17. Food-drug interactions precipitated by fruit juices other than grapefruit juice: An update review.

    Science.gov (United States)

    Chen, Meng; Zhou, Shu-Yi; Fabriaga, Erlinda; Zhang, Pian-Hong; Zhou, Quan

    2018-04-01

    This review addressed drug interactions precipitated by fruit juices other than grapefruit juice based on randomized controlled trials (RCTs). Literature was identified by searching PubMed, Cochrane Library, Scopus and Web of Science till December 30 2017. Among 46 finally included RCTs, six RCTs simply addressed pharmacodynamic interactions and 33 RCTs studied pharmacokinetic interactions, whereas seven RCTs investigated both pharmacokinetic and pharmacodynamic interactions. Twenty-two juice-drug combinations showed potential clinical relevance. The beneficial combinations included orange juice-ferrous fumarate, lemon juice- 99m Tc-tetrofosmin, pomegranate juice-intravenous iron during hemodialysis, cranberry juice-triple therapy medications for H. pylori, blueberry juice-etanercept, lime juice-antimalarials, and wheat grass juice-chemotherapy. The potential adverse interactions included decreased drug bioavailability (apple juice-fexofenadine, atenolol, aliskiren; orange juice-aliskiren, atenolol, celiprolol, montelukast, fluoroquinolones, alendronate; pomelo juice-sildenafil; grape juice-cyclosporine), increased bioavailability (Seville orange juice-felodipine, pomelo juice-cyclosporine, orange-aluminum containing antacids). Unlike furanocoumarin-rich grapefruit juice which could primarily precipitate drug interactions by strong inhibition of cytochrome P450 3A4 isoenzyme and P-glycoprotein and thus cause deadly outcomes due to co-ingestion with some medications, other fruit juices did not precipitate severely detrimental food-drug interaction despite of sporadic case reports. The extent of a juice-drug interaction may be associated with volume of drinking juice, fruit varieties, type of fruit, time between juice drinking and drug intake, genetic polymorphism in the enzymes or transporters and anthropometric variables. Pharmacists and health professionals should properly screen for and educate patients about potential adverse juice-drug interactions and help

  18. Financial results achieved in short-day strawberry production

    Directory of Open Access Journals (Sweden)

    Galić Dragan

    2014-01-01

    Full Text Available In South-western Ontario's continental climate (short days, hot summers and very cold winters the matted-row system was the dominant production system to grow short-day strawberries. Varieties-staggered production (planting a combination of early, mid and late-season varieties provides strawberry harvest from five to seven weeks. Short-day strawberries are vegetative grown in the first year, and harvested for two consecutive years. The total cost of short-day strawberry production was 54,370 $CAD/ha. The production and harvest costs in the first and second years were 20,812 $CAD/ha and 16,930 $CAD/ ha, respectively, and accounted for 69.42% of the total. Pre-plans operations were the least expensive procedures costing 8.13%, while planting and care of young plants made up 22.45% of the total costs. The total income of growing short-day strawberries under a matted-row system was 76,671 $CAD/ha (the first and second production years 41,330 $CAD/ha and 35,341 $CAD/ha, respectively. The short-day strawberries in matted-row system, with average yield of 15,722 kg/ha, generated a net revenue of 22,300 $CAD/ha.

  19. Comparative Transcriptomics Reveals Differential Gene Expression Related to Colletotrichum gloeosporioides Resistance in the Octoploid Strawberry

    Directory of Open Access Journals (Sweden)

    Feng Wang

    2017-05-01

    Full Text Available The strawberry is an important fruit worldwide; however, the development of the strawberry industry is limited by fungal disease. Anthracnose is caused by the pathogen Colletotrichum gloeosporioides and leads to large-scale losses in strawberry quality and production. However, the transcriptional response of strawberry to infection with C. gloeosporioides is poorly understood. In the present study, the strawberry leaf transcriptome of the ‘Yanli’ and ‘Benihoppe’ cultivars were deep sequenced via an RNA-seq analysis to study C. gloeosporioides resistance in strawberry. Among the sequences, differentially expressed genes were annotated with Gene Ontology terms and subjected to pathway enrichment analysis. Significant categories included defense, plant–pathogen interactions and flavonoid biosynthesis were identified. The comprehensive transcriptome data set provides molecular insight into C. gloeosporioides resistance genes in resistant and susceptible strawberry cultivars. Our findings can enhance breeding efforts in strawberry.

  20. Coating effect of chitosan irradiation on performance of strawberries (Fragaria x ananassa Duchesne)

    International Nuclear Information System (INIS)

    Gatot Trimulyadi Rekso; Adjat Sudradjat

    2016-01-01

    Strawberry is a horticultural product which has high economic value, however, strawberries are easily damaged. Therefore, required proper post harvest handling for keep up the appearances of strawberries, one of them is the edible coating technique using chitosan. The purpose of this research was to maintaining the appearance of strawberry. Chitosan is irradiated at a dose of 0 kGy, 5 kGy, and 10 kGy, and then characterized. Observations were carried on for five days at room temperature including: the testing of the performance of the fruit that was observed visually and analysis of fruit weight loss. The results showed that the performance of strawberries is coating with irradiated chitosan of 10 kGy is still good. The percentage of weight loss strawberries coated with irradiated chitosan smaller than the strawberries without coating with chitosan (control). Strawberries coated with irradiated chitosan has a shelf life and weight loss better than control. (author)

  1. 27 CFR 24.237 - Spirits added to juice or concentrated fruit juice.

    Science.gov (United States)

    2010-04-01

    ... AND TRADE BUREAU, DEPARTMENT OF THE TREASURY LIQUORS WINE Spirits § 24.237 Spirits added to juice or... fruit juice to which spirits have been added will be included in the appropriate tax class of any wine inventory and will be properly identified. Juice or concentrated juice to which wine spirits are added will...

  2. How Much Cranberry Juice Is in Cranberry-Apple Juice? A General Chemistry Spectrophotometric Experiment

    Science.gov (United States)

    Edionwe, Etinosa; Villarreal, John R.; Smith, K. Christopher

    2011-01-01

    A laboratory experiment that spectrophotometrically determines the percent of cranberry juice in cranberry-apple juice is described. The experiment involves recording an absorption spectrum of cranberry juice to determine the wavelength of maximum absorption, generating a calibration curve, and measuring the absorbance of cranberry-apple juice.…

  3. The Orange Juice Distribution Channel: Some Characteristics ...

    African Journals Online (AJOL)

    The fruit juice market is growing for several years, and will be continuing to expand, ... Several changes are taking place in the fruit juice distribution channels ... using the strategic SWOT (strong and weak points, opportunities and threats) ...

  4. Effects of a Variety of Food Extracts and Juices on the Specific Binding Ability of Norovirus GII.4 P Particles

    Science.gov (United States)

    LI, DAN; BAERT, LEEN; XIA, MING; ZHONG, WEIMING; JIANG, XI; UYTTENDAELE, MIEKE

    2014-01-01

    The effects of 13 food extracts and juices, including shellfish, fruits, and vegetables, on the binding ability of human norovirus (NoV) were examined, using P particles of human NoV GII.4 as a research surrogate. The enhancements (positive values) or reductions (negative values) of NoV P particle detection (changes in optical density at 450 nm) in the presence of different food extracts and juices as compared with P particles diluted in phosphate-buffered saline were tested by saliva-binding, enzyme-linked immunosorbent assay in triplicate. In the presence of different food extracts and juices at different concentrations, an increase or decrease of the receptor-binding ability of the NoV P particles was observed. Due to a higher specific binding and thus a higher accumulation of the viral particles, oysters may be contaminated with human NoV more often than other shellfish species (mussel, hard clams, and razor clams). Cranberry and pomegranate juices were shown to reduce the specific binding ability of human NoV P particles. No such binding inhibition effects were observed for the other tested extracts of fresh produce (strawberry, blackberry, blueberry, cherry tomato, spinach, romaine lettuce) or, notably, for raspberry, which has been associated with human NoV outbreaks. PMID:22980024

  5. Freeze concentration of lime juice

    Directory of Open Access Journals (Sweden)

    Ampawan Tansakul

    2008-11-01

    Full Text Available The main objective of this research was to study the effects of processing conditions, i.e. cooling medium temperature (-6, -12 and -18C and scraper blade rotational speed (50, 100 and 150 rpm on the freeze concentration of lime juice. The initial soluble solid content of lime juice was 7.6 Brix. Results showed that soluble solid content of lime juice increased as cooling medium temperature decreased while scraper blade rotational speed increased. It was also found that the processing condition with -18˚C cooling medium temperature and 150 rpm rotational speed of the scraper blade was the best among all studied conditions, although the loss of the soluble solids with ice crystals during ice separation was relatively high at 35%.

  6. JUICE space mission to Jupiter

    CERN Document Server

    CERN. Geneva

    2018-01-01

    JUICE - JUpiter ICy moons Explorer - is the first large-class mission in ESA's Cosmic Vision 2015-2025 programme. Planned for launch in 2022 and arrival at Jupiter in 2029, it will spend at least three years making detailed observations of the giant gaseous planet Jupiter and three of its largest moons, Ganymede, Callisto and Europa. JUICE will perform detailed investigations of Jupiter and its system in all their inter-relations and complexity with particular emphasis on Ganymede as a planetary body and potential habitat. Investigations of Europa and Callisto would complete a comparative picture of the Galilean moons. Jupiter is the archetype for the giant planets of the Solar System and for the numerous giant planets now known to orbit other stars. Moreover, Jupiter's diverse Galilean satellites - three of which are believed to harbour internal oceans - are central to understanding the habitability of icy worlds. JUICE spacecraft will carry the most powerful remote sensing, geophysical, and in situ paylo...

  7. The role of profilin and lipid transfer protein in strawberry allergy in the Mediterranean area

    NARCIS (Netherlands)

    Zuidmeer, L.; Salentijn, E.; Rivas, M. F.; Mancebo, E. G.; Asero, R.; Matos, C. I.; Pelgrom, K. T. B.; Gilissen, L. J. W. J.; van Ree, R.

    2006-01-01

    BACKGROUND: In contrast to other Rosaceae fruit, only few cases of patients with adverse reactions to strawberry are listed in literature. OBJECTIVE To identify allergenic proteins in strawberry and to express and characterize recombinant strawberry lipid transfer protein (LTP; rFra a 3). METHODS:

  8. Technological process for production of persimmon and strawberry vinegars

    Directory of Open Access Journals (Sweden)

    Claudio Hidalgo

    2010-08-01

    Full Text Available Claudio Hidalgo1, Estibaliz Mateo1, Ana Belen Cerezo2, Maria-Jesús Torija1, Albert Mas11Biotecnologia Enològica, Departament de Bioquimica i Biotecnologia, Facultat d’Enologia, Universitat Rovira i Virgili, Marcel-li Domingo, Tarragona; 2Área de Nutrición y Bromatología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, SpainAbstract: Fruit surplus is common in intensive agriculture in many countries. This ecologic and economic problem requires alternative uses to be found for fruit. The aim of this study was to use surplus fruit to produce vinegar by traditional methods (alcoholic fermentation and acetification from persimmon and strawberry. The process was performed with naturally occurring microorganisms and compared with inoculated commercial wine yeast for alcoholic fermentation. Alcoholic fermentation proceeded faster when inoculated due to the length of the lag phases observed in spontaneous fermentations. The alcoholic fermentations of strawberry mash were faster than those of persimmon mash. In contrast, acetifications were much faster in persimmon (30 days than in strawberry (70 days, in the latter some acetifications were not finished. From the technologic point of view, to produce persimmon and strawberry wine and vinegar, it is better to avoid fruit pressing and perform the process with fruit mash. Inoculation is recommended for persimmon and is necessary for strawberry.Keywords: wine, vinegar, fruit seasonings, acetic acid bacteria

  9. Nutrient composition of strawberry genotypes cultivated in a horticulture farm.

    Science.gov (United States)

    Hossain, Ashrafi; Begum, Parveen; Salma Zannat, M; Hafizur Rahman, Md; Ahsan, Monira; Islam, Sheikh Nazrul

    2016-05-15

    This article decribes the nutrient composition of four strawberry genotypes cultivated at the Sher-e-Bangla Agriculture University horticulture farm in Dhaka (Bangladesh). AOAC and standard validated methods were employed to analyse the nutrient composition. Protein, fat and ash contents were found to be vary significantly (LSD<0.05), while the variation in moisture (LSD<1.33), dietary fibre (LSD<0.15) and total sugar (LSD<0.09) were found to be insignificant among the genotypes. Vitamin C content ranged from 26.46 mg to 37.77 mg per 100g edible strawberries (LSD<0.060). Amount of carotenoids were found to be very low being in a range of 0.99-3.30 μg per 100g edible fruit. Analysis of mineral revealed that strawberry genotypes contained a wide array of minerals including Ca, Mg, Na, K, P, Mn, Zn, Cu and Fe; most of which varied significantly (LSD<0.05) among the genotypes. Strawberries could be a potential dietary supplement for vitamin C along with minerals, particularly for the children who do not like local fruits, but love to eat the colourful strawberries. Copyright © 2015 Elsevier Ltd. All rights reserved.

  10. Presence of the aphid, Chaetosiphon fragaefolii, on strawberry in Argentina.

    Science.gov (United States)

    Cédola, Claudia; Grecob, Nancy

    2010-01-01

    Seasonal abundance of the strawberry aphid complex under different agronomic practices in the outskirts of La Plata, Argentina was studied on strawberry, Fragaria x ananassa Duchesne (Rosales: Rosaceae). Aphid densities were low in strawberry fields in which insecticides and fungicides were used. In addition to Aphis gossypii, Aphis fabae, Mysus persicae and Macrosiphum euphorbiae, the aphid, Chaetosiphon fragaefolii (Cockerell) (Homoptera: Aphididae), was recorded for the first time in this horticultural area. Life history and some demographic parameters were calculated for C. fragaefolii. The mean duration of nymphal stages was 10.44 days, the oviposition period was 11.8 days, and the mean number of nymph/female/day was 2.4 +/- 0.3. Demographic parameters analyzed included the net reproductive rate R(o) = 14.55 +/- 0.096 nymph/female, generation time T=16.91 +/- 0.035 days, and the intrinsic rate of increase r(m) = 0.158 +/- (0.004). No parasites were found associated with C. fragaefolli. The pathogenic fungus, Entomophthora planchoniana Cornu (Zygomycetes: Entomophthorales) was the main mortality factor. Although aphids are not the main pests in strawberry fields, C. fragaefolii can be a serious problem because it can transmit several virus diseases of strawberry. Greater knowledge of life history traits and mortality factors of this species is needed in order to design appropriate control strategies.

  11. Colored plastic mulch microclimates affect strawberry fruit yield and quality.

    Science.gov (United States)

    Shiukhy, Saeid; Raeini-Sarjaz, Mahmoud; Chalavi, Vida

    2015-08-01

    Significant reduction of strawberry (Fragaria × ananassa, Duch.) fruit yield and quality, as a consequence of conventional cultivation method, is common in the Caspian Sea region, Iran. Recently, growers started using plastic mulches to overcome these shortcomings. Plastic mulches have different thermal and radiation properties and could affect strawberry fruit yield and quality. In the present study, the effect of different colored plastic mulches (black, red, and white) along with conventional practice was tested on yield and quality of strawberry Camarosa cultivar, in a completely randomized block design. Colored plastic mulches had highly significant effect on fruit weight, size, and phytochemical contents. In the most harvest times, mean fruit weight was significantly higher in red plastic relative to white and control treatments. Total fruit weight of plastic mulches was not significantly different, while all were statistically higher than that of control. Fruit size significantly increased over red plastic mulch. Total fruit numbers over plastic mulches were significantly higher than that of control treatment. The content of phenolic compounds was similar between treatments, while anthocyanin content, IC(50) value, and flavonoid content significantly were affected by colored plastics. In conclusion, colored plastic mulches could affect strawberry fruit weight and quality through altering strawberry thermal and radiation environment.

  12. Relationship between production, nematodes and "redness" in strawberries

    Directory of Open Access Journals (Sweden)

    Paula Nogueira Curi

    2016-08-01

    Full Text Available ABSTRACT: In recent years "redness" has increasingly appeared in strawberry plants with leaves taking on a reddish color. No causal agent has been associated with plants. Since strawberries presented problems due to the incidence of nematodes, the purpose of this study was to look at the relationship between production, resistance to the Meloidogyne hapla nematode and the "redness" symptom in strawberry cultivars. Two experiments were performed, both with the 'Camino Real', 'Festival', 'Oso Grande', 'Albion' and 'Camarosa' cultivars. The first experiment was performed in the field, where the following were evaluated: strawberry production, fruit quality, macro and micronutrient contents in fruit and leaves, percentage of plant survival, incidence of nematodes, quantity of eggs in the roots and juveniles in the soil, and the incidence of Botrytis cinerea . In the second experiment, the strawberries were transplanted into pots and filled with pinus bark-based commercial substrate. Half the pots were inocculated with Meloidogyne hapla . Cultivars presented differences in fruit production and also in the incidence of "redness". Lowest performance in production was related to the high incidence of the nematode Meloidogyne hapla. 'Oso Grande' and 'Albion' presented nematode-resistant behavior. It was possible find a relationship between the incidence of the Meloidogyne hapla nematode, and the incidence of "redness" only 'Camino Real' cultivar.

  13. Effect of fungicides on epiphytic yeasts associated with strawberry

    Science.gov (United States)

    Debode, Jane; Van Hemelrijck, Wendy; Creemers, Piet; Maes, Martine

    2013-01-01

    We studied the effect of two commonly used fungicides on the epiphytic yeast community of strawberry. Greenhouse and field experiments were conducted applying Switch (cyprodinil plus fludioxonil) or Signum (boscalid plus pyraclostrobin) to strawberry plants. Yeasts on leaves and fruits were assessed on treated and untreated plants at several time points via plating and denaturing gradient gel electrophoresis (DGGE) analysis. The yeast counts on plates of the treated plants were similar to the control plants. Unripe fruits had 10 times larger yeast concentrations than ripe fruits or leaves. Some dominant yeast types were isolated and in vitro tests showed that they were at least 10 times less sensitive to Switch and Signum as compared with two important fungal strawberry pathogens Botrytis cinerea and Colletotrichum acutatum, which are the targets for the fungicide control. DGGE analysis showed that the applied fungicides had no effect on the composition of the yeast communities, while the growing system, strawberry tissue, and sampling time did affect the yeast communities. The yeast species most commonly identified were Cryptococcus, Rhodotorula, and Sporobolomyces. These results point toward the potential applicability of natural occurring yeast antagonists into an integrated disease control strategy for strawberry diseases.

  14. Detection of intestinal parasites on field-grown strawberries in the Federal District of Brazil

    Directory of Open Access Journals (Sweden)

    Sandra Regina Morais da Silva

    2014-12-01

    Full Text Available Introduction This study evaluated the presence of pathogenic human parasites on field-grown strawberries in the Federal District of Brazil. Methods A total of 48 samples of strawberries and 48 soil samples from 16 properties were analyzed. Results Contaminated strawberries were detected in 56% of the properties. Schistosoma mansoni, Ascaris lumbricoides or Ascaris suum, Balantidium coli, Endolimax nana, and Entamoeba spp. were detected. Soil was contaminated with Entamoeba spp., Entamoeba coli, Strongyloides spp., Ancylostomatidae, and Hymenolepis nana. Conclusions Producers should be instructed on the safe handling of strawberries in order to reduce the incidence of strawberries that are contaminated with enteroparasites.

  15. Inspection of fecal contamination on strawberries using fluorescence imaging

    Science.gov (United States)

    Chuang, Yung-Kun; Yang, Chun-Chieh; Kim, Moon S.; Delwiche, Stephen R.; Lo, Y. Martin; Chen, Suming; Chan, Diane E.

    2013-05-01

    Fecal contamination of produce is a food safety issue associated with pathogens such as Escherichia coli that can easily pollute agricultural products via animal and human fecal matters. Outbreaks of foodborne illnesses associated with consuming raw fruits and vegetables have occurred more frequently in recent years in the United States. Among fruits, strawberry is one high-potential vector of fecal contamination and foodborne illnesses since the fruit is often consumed raw and with minimal processing. In the present study, line-scan LED-induced fluorescence imaging techniques were applied for inspection of fecal material on strawberries, and the spectral characteristics and specific wavebands of strawberries were determined by detection algorithms. The results would improve the safety and quality of produce consumed by the public.

  16. Solidago canadensis L essential oil vapor effectively inhibits Botrytis cinerea growth and preserves postharvest quality of strawberry as a food model system

    OpenAIRE

    Shumin Liu; Xingfeng Shao; Yanzhen Wei; Yonghua Li; Feng Xu; Hongfei Wang

    2016-01-01

    This study investigated the anti-fungal properties of Solidago canadensis L essential oil (SCLEO) against Botrytis cinerea in vitro, and its ability to control gray mold and maintain quality in strawberry fruits. SCLEO exhibited dose-dependent antifungal activity against B. cinerea and profoundly altered mycelial morphology, cellular ultrastructure, and membrane permeability as evaluated by scanning electron microscopy, transmission electron microscopy, and fluorescence microscopy. SCLEO vapo...

  17. Solidago canadensis L. Essential Oil Vapor Effectively Inhibits Botrytis cinerea Growth and Preserves Postharvest Quality of Strawberry as a Food Model System

    OpenAIRE

    Liu, Shumin; Shao, Xingfeng; Wei, Yanzhen; Li, Yonghua; Xu, Feng; Wang, Hongfei

    2016-01-01

    This study investigated the anti-fungal properties of Solidago canadensis L. essential oil (SCLEO) against Botrytis cinerea in vitro, and its ability to control gray mold and maintain quality in strawberry fruits. SCLEO exhibited dose-dependent antifungal activity against B. cinerea and profoundly altered mycelial morphology, cellular ultrastructure, and membrane permeability as evaluated by scanning electron microscopy, transmission electron microscopy, and fluorescence microscopy. SCLEO vap...

  18. Nontargeted metabolite profiles and sensory properties of strawberry cultivars grown both organically and conventionally.

    Science.gov (United States)

    Kårlund, Anna; Hanhineva, Kati; Lehtonen, Marko; Karjalainen, Reijo O; Sandell, Mari

    2015-01-28

    Strawberry (Fragaria × ananassa Duch.) contains many secondary metabolites potentially beneficial for human health, and several of these compounds contribute to strawberry sensory properties, as well. In this study, three strawberry cultivars grown both conventionally and organically were subjected to nontargeted metabolite profiling analysis with LC-qTOF-ESI-MS and to descriptive sensory evaluation by a trained panel. Combined metabolome and sensory data (PLS model) revealed that 79% variation in the metabolome explained 88% variation in the sensory profiles. Flavonoids and condensed and hydrolyzable tannins determined the orosensory properties, and fatty acids contributed to the odor attributes of strawberry. Overall, the results indicated that the chemical composition and sensory quality of strawberries grown in different cultivation systems vary mostly according to cultivar. Organic farming practices may enhance the accumulation of some plant metabolites in specific strawberry genotypes. Careful cultivar selection is a key factor for the improvement of nutritional quality and marketing value of organic strawberries.

  19. Identification of gamma-irradiated fruit juices by EPR spectroscopy

    Science.gov (United States)

    Aleksieva, K. I.; Dimov, K. G.; Yordanov, N. D.

    2014-10-01

    The results of electron paramagnetic resonance (EPR) study on commercially available juices from various fruits and different fruit contents: 25%, 40%, 50%, and 100%, homemade juices, nectars and concentrated fruit syrups, before and after gamma-irradiation are reported. In order to remove water from non- and irradiated samples all juices and nectars were filtered; the solid residue was washed with alcohol and dried at room temperature. Only concentrated fruit syrups were dried for 60 min at 40 °C in a standard laboratory oven. All samples under study show a singlet EPR line with g=2.0025 before irradiation with exception of concentrated fruit syrups, which are EPR silent. Irradiation of juice samples gives rise to complex EPR spectra which gradually transferred to "cellulose-like" EPR spectrum from 25% to 100% fruit content. Concentrated fruit syrups show typical "sugar-like" spectra due to added saccharides. All EPR spectra are characteristic and can prove radiation treatment. The fading kinetics of radiation-induced EPR signals were studied for a period of 60 days after irradiation.

  20. Chicken Juice Enhances Surface Attachment and Biofilm Formation of Campylobacter jejuni

    Science.gov (United States)

    Brown, Helen L.; Reuter, Mark; Salt, Louise J.; Cross, Kathryn L.; Betts, Roy P.

    2014-01-01

    The bacterial pathogen Campylobacter jejuni is primarily transmitted via the consumption of contaminated foodstuffs, especially poultry meat. In food processing environments, C. jejuni is required to survive a multitude of stresses and requires the use of specific survival mechanisms, such as biofilms. An initial step in biofilm formation is bacterial attachment to a surface. Here, we investigated the effects of a chicken meat exudate (chicken juice) on C. jejuni surface attachment and biofilm formation. Supplementation of brucella broth with ≥5% chicken juice resulted in increased biofilm formation on glass, polystyrene, and stainless steel surfaces with four C. jejuni isolates and one C. coli isolate in both microaerobic and aerobic conditions. When incubated with chicken juice, C. jejuni was both able to grow and form biofilms in static cultures in aerobic conditions. Electron microscopy showed that C. jejuni cells were associated with chicken juice particulates attached to the abiotic surface rather than the surface itself. This suggests that chicken juice contributes to C. jejuni biofilm formation by covering and conditioning the abiotic surface and is a source of nutrients. Chicken juice was able to complement the reduction in biofilm formation of an aflagellated mutant of C. jejuni, indicating that chicken juice may support food chain transmission of isolates with lowered motility. We provide here a useful model for studying the interaction of C. jejuni biofilms in food chain-relevant conditions and also show a possible mechanism for C. jejuni cell attachment and biofilm initiation on abiotic surfaces within the food chain. PMID:25192991

  1. Combining 1,4-dimethoxybenzene, the major flower volatile of wild strawberry Fragaria vesca, with the aggregation pheromone of the strawberry blossom weevil Anthonomus rubi improves attraction

    DEFF Research Database (Denmark)

    Wibe, Atle; Borg-Karlson, Anna Karin; Cross, Jerry

    2014-01-01

    The aggregation pheromone of strawberry blossom weevil [Anthonomus rubi Herbst (Col.: Curculionidae)], a 1:4:1 blend of Grandlure I, II and racemic lavadulol, has been available for pest monitoring for several years but shows low attractancy. Attempts to control A.rubi using the pheromone alone...... were also unsuccessful. This paper reports the finding that addition of the major flower volatile from wild strawberry flowers [Fragaria vesca L. (Rosaceae)], 1,4-dimethoxybenzene (comprising 98% of the volatiles emitted from wild strawberry flowers), to the aggregation pheromone increased trap catches...... pest of strawberry....

  2. Food-drug interactions precipitated by fruit juices other than grapefruit juice: An update review

    Directory of Open Access Journals (Sweden)

    Meng Chen

    2018-04-01

    Full Text Available This review addressed drug interactions precipitated by fruit juices other than grapefruit juice based on randomized controlled trials (RCTs. Literature was identified by searching PubMed, Cochrane Library, Scopus and Web of Science till December 30 2017. Among 46 finally included RCTs, six RCTs simply addressed pharmacodynamic interactions and 33 RCTs studied pharmacokinetic interactions, whereas seven RCTs investigated both pharmacokinetic and pharmacodynamic interactions. Twenty-two juice-drug combinations showed potential clinical relevance. The beneficial combinations included orange juice-ferrous fumarate, lemon juice-99mTc-tetrofosmin, pomegranate juice-intravenous iron during hemodialysis, cranberry juice-triple therapy medications for H. pylori, blueberry juice-etanercept, lime juice-antimalarials, and wheat grass juice-chemotherapy. The potential adverse interactions included decreased drug bioavailability (apple juice-fexofenadine, atenolol, aliskiren; orange juice-aliskiren, atenolol, celiprolol, montelukast, fluoroquinolones, alendronate; pomelo juice-sildenafil; grape juice-cyclosporine, increased bioavailability (Seville orange juice-felodipine, pomelo juice-cyclosporine, orange-aluminum containing antacids. Unlike furanocoumarin-rich grapefruit juice which could primarily precipitate drug interactions by strong inhibition of cytochrome P450 3A4 isoenzyme and P-glycoprotein and thus cause deadly outcomes due to co-ingestion with some medications, other fruit juices did not precipitate severely detrimental food–drug interaction despite of sporadic case reports. The extent of a juice-drug interaction may be associated with volume of drinking juice, fruit varieties, type of fruit, time between juice drinking and drug intake, genetic polymorphism in the enzymes or transporters and anthropometric variables. Pharmacists and health professionals should properly screen for and educate patients about potential adverse juice

  3. Differential protein accumulations in isolates of the strawberry wilt pathogen Fusarium oxysporum f. sp. fragariae differing in virulence.

    Science.gov (United States)

    Fang, Xiangling; Barbetti, Martin J

    2014-08-28

    This study was conducted to define differences in Fusarium oxysporum f. sp. fragariae (Fof) isolates with different virulence efficiency to strawberry at the proteome level, in combination with their differences in mycelial growth, conidial production and germination. Comparative proteome analyses revealed substantial differences in mycelial proteomes between Fof isolates, where the 54 differentially accumulated protein spots were consistently over-accumulated or exclusively in the highly virulent isolate. These protein spots were identified through MALDI-TOF/TOF mass spectrometry analyses, and the identified proteins were mainly related to primary and protein metabolism, antioxidation, electron transport, cell cycle and transcription based on their putative functions. Proteins of great potential as Fof virulence factors were those involved in ubiquitin/proteasome-mediated protein degradation and reactive oxygen species detoxification; the hydrolysis-related protein haloacid dehalogenase superfamily hydrolase; 3,4-dihydroxy-2-butanone 4-phosphate synthase associated with riboflavin biosynthesis; and those exclusive to the highly virulent isolate. In addition, post-translational modifications may also make an important contribution to Fof virulence. F. oxysporum f. sp. fragariae (Fof), the causal agent of Fusarium wilt in strawberry, is a serious threat to commercial strawberry production worldwide. However, factors and mechanisms contributing to Fof virulence remained unknown. This study provides knowledge of the molecular basis for the differential expression of virulence in Fof, allowing new possibilities towards developing alternative and more effective strategies to manage Fusarium wilt. Copyright © 2014 Elsevier B.V. All rights reserved.

  4. Preparation of Ready to Serve Grape Juice

    International Nuclear Information System (INIS)

    Mya Mya Than, Daw; Molly Ahad, Daw; Khin Khin Lay, Daw

    1997-10-01

    Studies were carried out at the Food Technology Research Department of Myanma Scientific and Technological Research Department to prepare ready to serve grape juice from ripe fruits of the red varieties of grapes. The sugar content of grapes varied from (10) to (14) % depending on the season. To get a maximum content of (16) % sugar in the juice, (2) to (6) % sugar was added. The yields of the seasonal grape juice varied from (62.5) to (72.2) % by weight. The tannin content was (0.36) % by volume in the fresh juice. It was decreased to (0.03) % by volume after the cold storage at (10)C for (10 to 15) days. The pH of the original fruit juice was (3.2). The best juice was obtain when the pH of the juice was(4.0). To obtain the higher yield of the juice, desirable bright colour and rapid clarification, (0.01) %. Pectinex enzyme was added. In this investigation grape juice was preserved with (0.1) % sodium benzoate. Storage studies, which also included microbiological aspects indicated that the pasteurized grape juice bottle can be stored at room temperature for minimum (6) months without any deterioration in quality

  5. 21 CFR 146.145 - Orange juice from concentrate.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Orange juice from concentrate. 146.145 Section 146... Juices and Beverages § 146.145 Orange juice from concentrate. (a) Orange juice from concentrate is the food prepared by mixing water with frozen concentrated orange juice as defined in § 146.146 or with...

  6. 21 CFR 146.146 - Frozen concentrated orange juice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Frozen concentrated orange juice. 146.146 Section... Fruit Juices and Beverages § 146.146 Frozen concentrated orange juice. (a) Frozen concentrated orange juice is the food prepared by removing water from the juice of mature oranges as provided in § 146.135...

  7. 21 CFR 146.152 - Orange juice with preservative.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Orange juice with preservative. 146.152 Section... Fruit Juices and Beverages § 146.152 Orange juice with preservative. (a) Orange juice with preservative... of orange juice for manufacturing as provided for in § 146.151, except that a preservative is added...

  8. Chemical composition and organoleptic evaluation of juice from steamed cashew apple blended with orange juice.

    Science.gov (United States)

    Inyang, U E; Abah, U J

    1997-01-01

    Fully riped cashew apples (yellow variety) were steamed for 7 minutes prior to juice extraction. The extracted juice was blended with various proportions of sweet orange juice. Chemical composition and organoleptic evaluation were carried out on both the blended and unblended juices. The ascorbic acid content of unsteamed cashew apple juice was 287 mg/100 ml. Steaming of the cashew apple prior to juice extraction resulted in a decreased (230 mg/100 ml) content of ascorbic acid. It also led to slight decreases in soluble solids and titratable acidity. A comparison of the chemical composition of the two juices showed that the orange juice contained more sugars, titratable acidity and soluble solids but less ascorbic acid than cashew apple juice. Consequently, the soluble solids, titratable acidity, reducing and total sugars of the blends increased with increase in the proportions of orange juice while the content of ascorbic acid was decreasing. In spite of the decrease in ascorbic acid content of the blends, results showed that blended juice would no doubt be a very good source of ascorbic acid. Result of the organoleptic evaluation revealed that a 60% cashew apple and 40% orange juice gave a good quality juice in terms of flavor, after taste and overall acceptability.

  9. A novel 3D imaging system for strawberry phenotyping

    Directory of Open Access Journals (Sweden)

    Joe Q. He

    2017-11-01

    Full Text Available Abstract Background Accurate and quantitative phenotypic data in plant breeding programmes is vital in breeding to assess the performance of genotypes and to make selections. Traditional strawberry phenotyping relies on the human eye to assess most external fruit quality attributes, which is time-consuming and subjective. 3D imaging is a promising high-throughput technique that allows multiple external fruit quality attributes to be measured simultaneously. Results A low cost multi-view stereo (MVS imaging system was developed, which captured data from 360° around a target strawberry fruit. A 3D point cloud of the sample was derived and analysed with custom-developed software to estimate berry height, length, width, volume, calyx size, colour and achene number. Analysis of these traits in 100 fruits showed good concordance with manual assessment methods. Conclusion This study demonstrates the feasibility of an MVS based 3D imaging system for the rapid and quantitative phenotyping of seven agronomically important external strawberry traits. With further improvement, this method could be applied in strawberry breeding programmes as a cost effective phenotyping technique.

  10. A novel 3D imaging system for strawberry phenotyping.

    Science.gov (United States)

    He, Joe Q; Harrison, Richard J; Li, Bo

    2017-01-01

    Accurate and quantitative phenotypic data in plant breeding programmes is vital in breeding to assess the performance of genotypes and to make selections. Traditional strawberry phenotyping relies on the human eye to assess most external fruit quality attributes, which is time-consuming and subjective. 3D imaging is a promising high-throughput technique that allows multiple external fruit quality attributes to be measured simultaneously. A low cost multi-view stereo (MVS) imaging system was developed, which captured data from 360° around a target strawberry fruit. A 3D point cloud of the sample was derived and analysed with custom-developed software to estimate berry height, length, width, volume, calyx size, colour and achene number. Analysis of these traits in 100 fruits showed good concordance with manual assessment methods. This study demonstrates the feasibility of an MVS based 3D imaging system for the rapid and quantitative phenotyping of seven agronomically important external strawberry traits. With further improvement, this method could be applied in strawberry breeding programmes as a cost effective phenotyping technique.

  11. Refining ASD for disease management in strawberry and apple production

    Science.gov (United States)

    Anaerobic soil disinfestation (ASD) has been studied as an industry level option for replacing soil fumigants to manage soil-borne diseases in both annual and perennial crop production systems. Although ASD has proven effective for the suppression of certain soil-borne pathogens in both strawberry ...

  12. Developing a strawberry yogurt fortified with marine fish oil

    Science.gov (United States)

    Fortified dairy products appeal to a wide variety of consumers and have the potential to increase sales in the yogurt industry and contribute to boost the intake of omega-3 fatty acids. The objectives of this study were to develop a strawberry yogurt containing microencapsulated salmon oil (2% w/v) ...

  13. Application of thermoluminescence measurements to detect irradiated strawberries

    International Nuclear Information System (INIS)

    Heide, L.; Guggenberger, R.; Bogl, K.W.

    1990-01-01

    The thermoluminescence intensity of unirradiated and irradiated strawberries was studied with regard to dose response, storage time, and different varieties. An identification method could finally be developed. Further investigations were carried out to determine the origin of the thermoluminescence effect, which was found to be attributable to mineral grains adhering to the sample surface

  14. Microbiological possibilities to demonstrate that strawberries have been irradiated

    International Nuclear Information System (INIS)

    Tamminga, S.K.; Beumer, R.R.; Kampelmacher, E.H.

    1975-01-01

    Samples of greenhouse and outdoor-grown strawberries were divided into two portions, they were wrapped and one portion was irradiated at 200 krad. The composition of the microflora before and after irradiation was investigated. The flora of the non-irradiated samples was composed mainly of gram-negative rod-shaped bacteria belonging, with only a few exceptions, either to the Enterobacteriaceae-family or to the genus Pseudomonas. Also, moulds and yeasts were frequently encountered in varying quantities. Moulds and yeasts did not appear to make good indicator organisms. Gram-negative rod-shaped bacteria were always found to be absent after irradiation when solid media were used, even when starting from samples with numbers in the order of magnitude 10 5 -10 6 /gm. When outdoor-grown strawberries were used, this always led to a clear difference from the cooresponding untreated samples. Greenhouse strawberries, however, sometimes contain, even if they have not been treated, only a very small number of micro-organisms. Consequently, if gram-negative rod-shaped bacteria are present on strawberries they most probably have not been irradiated. Of course, this does not apply if post-contamination has been possible. If there is no growth of the above mentioned bacteria on any of te media used, considerable possibility exists that irradiation has taken place. (orig./MG) [de

  15. PHYSICOCHEMICAL QUALITY OF SELECTED STRAWBERRY JAMS WITH FRUCTOSE

    Directory of Open Access Journals (Sweden)

    Weronika Prochwicz Zagórska

    2010-05-01

    Full Text Available Four different commercially available strawberry jams with fructose were characterized in relation to acidity and reducing sugar, ash, micro- and macroelement contents. The results showed that the jams differed in active and total acidity, ash, as well as reducing sugar content. Differences between the jams were more pronounced for microelements than for macroelements. doi:10.5219/46  

  16. Real - time NASBA detection of strawberry vein banding virus

    Czech Academy of Sciences Publication Activity Database

    Hanzlíková-Vašková, Dana; Špak, Josef; Klerks, M. M.; Schoen, C. D.; Thompson, J. R.; Jelkmann, W.

    2004-01-01

    Roč. 110, - (2004), s. 213-221 ISSN 0929-1873 Grant - others:EU(XE) QLRT-PL99-1553 Institutional research plan: CEZ:AV0Z5051902 Keywords : strawberry virus * detection Subject RIV: EE - Microbiology, Virology Impact factor: 1.384, year: 2004

  17. Seasonal alteration of sugar metabolism in strawberry ( Fragaria ...

    African Journals Online (AJOL)

    Plants of strawberry cvs Aromas and Diamante were removed from the field in cold acclimated (CA, January) and non-acclimated (NA, July) stages. Crown parts of the plant were used for analysis. Apoplastic total soluble sugar (TSS), reducing sugars and sucrose contents did not change in both cultivars in both sampling ...

  18. Det globale marked for juice

    DEFF Research Database (Denmark)

    Hansen, Henning Otte

    2015-01-01

    inden for æblejuice er Kina vigtig og står for 35 pct. af verdens samlede eksport. Den internationale handel med juice er meget omfattende, og mange lande er store både importører og eksportører. Den danske import af æblejuice kommer især fra Tyskland og Østrig, som dog også har en stor import fra Kina...

  19. Studies on preparation of mixed toffee from guava and strawberry.

    Science.gov (United States)

    Chavan, U D; Pawar, U B; Pawar, G H

    2015-10-01

    The present investigation was carried out to develop a technology for preparation of mixed toffee from guava and strawberry pulp and to study the changes in chemical composition and sensory properties of toffee during storage at ambient temperature as well as refrigerated condition. Preliminary experiments were conducted to find out optimum levels of guava and strawberry pulp. The toffees prepared were wrapped in metallic coated polythene wrapper, packed in 200 gauge polythene bags and stored at ambient (27 ± 2 oC) as well as refrigerated (5 ± 2 oC) condition for 90 days. The stored samples were drawn periodically at 30 days interval for organoleptic and chemical analysis. Preliminary studies were carried out to standardize the optimum levels of guava and strawberry pulp. Among various combinations of guava and strawberry pulp, 70 : 30 w/w (guava : strawberry) ratios toffee was found better than other combinations in respect to organoleptic properties and nutritional quality. The yield of fresh toffee was higher (868 g/kg of pulp) in toffee prepared from 100 % guava (control). The chemical composition indicated that the fresh toffees contained on an average moisture 8.73 %, TSS 83.21 oBrix, titrable acidity 0.3 %, total sugars 73.1 % and ascorbic acid 64.1 mg/100 g. The mean score of fresh toffees for colour and appearance was 8.29, texture 8.02, flavour 8.22, taste 8.32 and overall acceptability 8.16 on 9 point Hedonic scale. The cost of fresh toffee was Rs. 282/kg which was prepared from 70 : 30 guava and strawberry pulp level. The storage studies indicated that the TSS and total sugars increased with the advancement of storage period, while moisture content, ascorbic acid and acidity decreased. The rates of increase or decrease were relatively higher at ambient temperature than refrigerated temperature. The sensory quality of toffees also decreased at faster rate during 90 days storage period at ambient condition than the refrigerated

  20. Polyphenols content and antioxidant capacity of traditional juices ...

    African Journals Online (AJOL)

    SARAH

    2015-03-31

    Mar 31, 2015 ... traditional juices consumed in Côte d'Ivoire. Amoin Georgette ... Baobab fruit juice and Roselle calices juices exhibited the highest ... from plants involved in this study must be considered for their ..... by liquid carbon dioxide.

  1. The effect of dietary factors on strawberry anthocyanins oral bioavailability.

    Science.gov (United States)

    Xiao, Di; Sandhu, Amandeep; Huang, Yancui; Park, Eunyoung; Edirisinghe, Indika; Burton-Freeman, Britt M

    2017-11-15

    Strawberries are a dietary source of anthocyanins, particularly pelargonidin glycosides. Dietary anthocyanins have received increasing attention among researchers and consumers due to their health benefits. The oral bioavailability of anthocyanins is reported to be low and various dietary factors may influence their oral bioavailability further. Milk is suggested to reduce (poly)phenols' oral bioavailability. However, the effect of milk on anthocyanin oral bioavailability remains uncertain. Likewise, mixed nutrient meals may influence the oral bioavailability of anthocyanins. Therefore, the purpose of this study was to assess the effect of milk on the oral bioavailability and other pharmacokinetic (PK) variables of strawberry anthocyanins consumed with and without a meal. Nine healthy participants consumed a strawberry beverage prepared in milk or water with a standard meal on two occasions. On two additional occasions, the beverages were given to a subset (n = 4) of participants to determine the impact of the meal on anthocyanin PK variables, including oral bioavailability. Independent of the meal, beverages prepared in milk significantly reduced the peak plasma concentrations (C max ) of pelargonidin-3-O-glucoside (P-3-G), pelargonidin-glucuronide (PG) and pelargonidin-3-O-rutinoside (P-3-R), as well as the PG and P-3-R area under the curve (AUC) (p bioavailability of pelargonidin anthocyanins under meal conditions; however, the oral relative bioavailability of pelargonidin anthocyanins was reduced by ∼50% by milk under without meal conditions (p < 0.05). Consuming strawberry beverages made with milk and consuming those made with water with and without a meal influenced different aspects of strawberry anthocyanin PKs. The significance of this effect on clinical efficacy requires additional research.

  2. Down-regulation of the strawberry Bet v 1-homologous allergen in concert with the flavonoid biosynthesis pathway in colorless strawberry mutant

    DEFF Research Database (Denmark)

    Hjernø, Karin; Alm, Rikard; Canbäck, Björn

    2006-01-01

    Proteomic screening of strawberry (Fragaria ananassa) yielded a 58% success rate in protein identification in spite of the fact that no genomic sequence is available for this species. This was achieved by a combination of MALDI-MS/MS de novo sequencing of double-derivatized peptides and indel......-tolerant searching against local protein databases built on both EST and full-length nucleotide sequences. The amino acid sequence of a strawberry allergen, homologous to the well-known major birch pollen allergen Bet v 1, was partially determined. This strawberry allergen, named Fra a 1 according...... to the nomenclature for allergen proteins, showed sequence identity of 54 and 77%, respectively, with corresponding allergens from birch and apple. Differential expression, as evaluated by 2-D DIGE, occurred in 10% of protein spots when red strawberries were compared to a colorless (white) strawberry mutant. White...

  3. The Effect of Freezing and Hydrocolloids on the Physical Parameters of Strawberry Mass-Based Desserts

    Directory of Open Access Journals (Sweden)

    Boča Sigita

    2014-07-01

    Full Text Available The aim of the study was to evaluate the effect of freezing, thickening and storage on the physical properties of the strawberry desserts made with addition of various hydrocolloids. The strawberry cultivars ‘Polka’, ‘Honeoye’, and ‘Senga Sengana’ harvested in Latvia were used in the study. The strawberries were processed in a blender for obtaining a homogenous mass. The strawberry mass was analyzed fresh and after storage at -18 °C. Both fresh and frozen strawberry mass samples with added gelatine, xanthan gum, and sodium carboxymethyl cellulose were whisked until obtaining dessert. For determination of the optimum hydrocolloid amount, sensory evaluation was done using a five-point hedonic scale. Moisture, soluble solids content, density, and pH of the product were determined. Apparent viscosity was measured using a rotational viscometer DV–III Ultra. Consistency of the dessert during its storage was evaluated using a texture analyser TA.XT.plus. The results of sensory evaluation allow concluding that in order to provide the most acceptable consistency, colour, and taste of strawberry dessert, the optimum quantity of carboxymethyl cellulose and xanthan gum to be added is 0.6% and that of gelatine is 6%. During freezing, the soluble solids content and pH level decreased in the strawberry mass, whereas the addition of hydrocolloids increased these values. The moisture content in strawberry puree, in its turn, as a result of freezing increased under the influence of syneresis, but added hydrocolloids, on the contrary, decreased this influence. Also the viscosity and consistency of the strawberry puree prepared from the researched cultivars decreased under the influence of freezing, whereas the addition of hydrocolloids increased both the values, making the strawberry dessert firmer. The research suggests that strawberry dessert with gelatine had the most pronounced changes during storage, but strawberry dessert with added xanthan

  4. Characterization of microbial communities and fungal metabolites on field grown strawberries from organic and conventional production

    DEFF Research Database (Denmark)

    Jensen, Birgit; Knudsen, Inge-Marie Birkedal; Andersen, Birgitte

    2013-01-01

    The background levels of culturable indigenous microbial communities (microbiotas) on strawberries were examined in a field survey with four conventional and four organic growers with different production practise and geographic distribution. The microbiota on apparently healthy strawberries...... produced cyclopenol, cyclopenin, and viridicatin on the artificially infected berries, while Altemaria arborescens produced tenuazonic acid, Alternaria tenuissima produced altertoxin land altenuene, and Trichoderma spp. produced several peptaibols. In conclusion, native strawberry microbiotas are highly...

  5. Electrochemical behaviour of polyphenol rich fruit juices using disposable screen-printed carbon electrodes: towards a rapid sensor for antioxidant capacity and individual antioxidants.

    Science.gov (United States)

    Bordonaba, Jordi Giné; Terry, Leon A

    2012-02-15

    The analysis of antioxidants in different foodstuffs and especially fruits has become an active area of research which has lead to numerous antioxidant-assays being recently developed. Many antioxidants exhibit inherent electroactivity, and hence employing electrochemical methods could be a viable approach for evaluating the overall antioxidant capacity of a fresh produce matrix without the need for added reactive species. This work shows the possibility of using square wave voltammetry (SWV) and other electrochemical methods with disposable screen-printed carbon electrodes, to quantify and assess antioxidant activity and abundance of specific antioxidants, mainly polyphenols in selected soft fruit juices. Freshly squeezed black currant and strawberry juices of different cultivars and maturity stages were chosen according to known differences in their antioxidant profile. As a result of the increasing applied potential (0-1000 mV vs. Ag/AgCl) the electroactive compounds present in the juices were oxidised leading to a characteristic voltammetric profile for each of the samples analysed. Generally, black currant juices had greater oxidation peaks at lower potentials (<400 mV) which were indicators of higher antioxidant capacities. The relationship between sensor cumulative responses at different applied potentials and total or individual antioxidants, as determined by conventional spectrophotometric methods (FRAP, Folin-Ciocalteu) and HPLC (individual anthocyanins and ascorbate), respectively, are discussed in the context of the development of a rapid sensor for antioxidants. Copyright © 2011 Elsevier B.V. All rights reserved.

  6. Deterioration and fermentability of energy cane juice

    Directory of Open Access Journals (Sweden)

    Sandra Regina Ceccato-Antonini

    Full Text Available ABSTRACT: The main interest in the energy cane is the bioenergy production from the bagasse. The juice obtained after the cane milling may constitute a feedstock for the first-generation ethanol units; however, little attention has been dedicated to this issue. In order to verify the feasibility of the energy cane juice as substrate for ethanol production, the objectives of this research were first to determine the microbiological characteristics and deterioration along the time of the juices from two clones of energy cane (Type I and second, their fermentability as feedstock for utilization in ethanol distilleries. There was a clear differentiation in the bacterial and yeast development of the sugarcane juices assayed, being much faster in the energy canes than in sugarcane. The storage of juice for 8 hours at 30oC did not cause impact in alcoholic fermentation for any sample analyzed, although a significant bacterial growth was detected in this period. A decrease of approximately seven percentage points in the fermentative efficiency was observed for energy cane juice in relation to sugarcane in a 24-hour fermentation cycle with the baking yeast. Despite the faster deterioration, the present research demonstrated that the energy cane juice has potential to be used as feedstock in ethanol-producing industries. As far as we know, it is the first research to deal with the characteristics of deterioration and fermentability of energy cane juices.

  7. 21 CFR 146.185 - Pineapple juice.

    Science.gov (United States)

    2010-04-01

    ... reconstituted with water suitable for the purpose of maintaining essential composition and quality factors of... Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION CANNED FRUIT JUICES Requirements for Specific Standardized Canned Fruit Juices and Beverages § 146...

  8. Grape Juice: Same Heart Benefits as Wine?

    Science.gov (United States)

    ... eating Does grape juice offer the same heart benefits as red wine? Answers from Katherine Zeratsky, R.D., L.D. ... juices may provide some of the same heart benefits of red wine, including: Reducing the risk of blood clots Reducing ...

  9. Microbiological Quality of Fresh Nopal Juice.

    Science.gov (United States)

    Hernández-Anguiano, Ana María; Landa-Salgado, Patricia; Eslava-Campos, Carlos Alberto; Vargas-Hernández, Mateo; Patel, Jitendra

    2016-12-10

    The consumption of fresh nopal cactus juice is widely popular among health-conscious consumers in Mexico. The juice is prepared from fresh cladodes that have only been rinsed with tap water and are not subjected to a pasteurization or terminal bacterial reduction process. The aim of this study was to evaluate the microbial quality of commercially available fresh juices ( n = 162) made with nopal in Texcoco, State of Mexico, during the summer and spring season. Standard microbiological methods, the PCR technique and the serological method were used for isolation and identification of bacteria. All samples contained total coliforms and 91% were positive for Escherichia coli . Although total coliforms and E. coli were detected throughout the study, their populations were significantly lower ( p nopal juices is unacceptable due to its health significance. The information generated in this study is relevant for human health risk assessment associated with the consumption of unpasteurized nopal juices and potential interventions to minimize pathogen contamination.

  10. Biological control of Mycosphaerella fragariae in strawberry culture

    Directory of Open Access Journals (Sweden)

    Anderson Luis Heling

    2015-12-01

    Full Text Available The Mycosphaerella spot is one of the main foliar diseases of strawberry, degrating great leaf regions and reducing the photosynthetic area. Its control is mainly by the use of chemical fungicides, but, due the increasing demand for food free of pesticide, alternative control methods have been researched, such as biological control. This work aimed to evaluate the effect on strawberry plants, treated with the biological control agents Bacillus cereus, Saccharomyces boulardii and Saccharomyces cerevisiae, in the severity of Mycosphaerella fragariae, productivity and in the activity of β-1.3 glucanases, peroxidases and chitinases enzymes. It was verified that S. cerevisiae and B. cereus treatments were similar to fungicide for disease control. However, even reducing the severity of the disease, there was no increase in productivity, and the different control agents do not cause changes in the evaluated defense mechanisms.

  11. Controlled atmosphere storage of wild strawberry fruit (Fragaria vesca L.).

    Science.gov (United States)

    Almenar, Eva; Hernández-Muñoz, Pilar; Lagarón, José M; Catalá, Ramón; Gavara, Rafael

    2006-01-11

    Controlled atmosphere storage technology to extend the shelf life of "Reina de los Valles" wild strawberry fruit (Fragaria vesca L.) was studied. Fruits were stored at 3 degrees C for three weeks in different atmosphere compositions: 0.05% CO2/21% O2 (air), 3% CO2/18% O2, 6% CO2/15% O2, 10% CO2/11% O2, and 15% CO2/6% O2. The effect of gas composition on soluble solids content, titrable acidity, pH, off-flavor, aroma volatiles, and consumer preference was monitored. The result showed that the 10% CO2/11% O2 combination can efficiently prolong the shelf life of wild strawberries by maintaining the quality parameters within acceptable values, through inhibiting the development of Botrytis cinerea, without significantly modifying consumer acceptance.

  12. Enantioselective behaviour of tetraconazole during strawberry wine-making process.

    Science.gov (United States)

    Liu, Na; Pan, Xinglu; Zhang, Shuang; Ji, Mingshan; Zhang, Zhihong

    2018-05-01

    The fate of tetraconazole enantiomers in strawberries during wine-making process was studied. The residues were determined by ultra-performance convergence chromatography tandem triple quadrupole mass spectrometry after each process steps. Results indicated that there was significant enantioselective dissipation of tetraconazole enantiomers during the fermentation process. And (-)-tetraconazole degraded faster than (+)-tetraconazole. The half-lives of (-)-tetraconazole and (+)-tetraconazole were 3.12, 3.76 days with washing procedure and 3.18, 4.05 days without washing procedure. The processing factors of strawberry wine samples after each step were generally less than 1. In particular, the processing factors of the fermentation process were the lowest. The results could help facilitate more accurate risk assessments of tetraconazole during wine-making process. © 2018 Wiley Periodicals, Inc.

  13. Effect of trehalose addition on volatiles responsible for strawberry aroma.

    Science.gov (United States)

    Kopjar, Mirela; Hribar, Janez; Simcic, Marjan; Zlatić, Emil; Pozrl, Tomaz; Pilizota, Vlasta

    2013-12-01

    Aroma is one of the most important quality properties of food products and has a great influence on quality and acceptability of foods. Since it is very difficult to control, in this study the effect of addition of trehalose (3, 5 and 10%) to freeze-dried strawberry cream fillings was investigated as a possible means for retention of some of the aroma compounds responsible for the strawberry aroma. In samples with added trehalose, higher amounts of fruity esters were determined. Increase of trehalose content did not cause a proportional increase in the amount of fruity esters. However, results of our research showed that trehalose addition did not have the same effect on both gamma-decalactone and furaneol.

  14. Enhancement of glycerol production by zygosaccharomyces ruxii using strawberry wastes

    International Nuclear Information System (INIS)

    Meleigy, S.A; Taha, S.M.A.

    2010-01-01

    Glycerol is important industrial product that can be produced using osmophilic yeasts. In this study a local isolate of osmophilic yeast, zygosaccharomyces ruxii, was used for glycerol production from strawberry waste. The effects of some important parameters including glucose and urea concentrations, incubation temperature, initial ph and gamma irradiation were investigated. The optimum conditions for maximum glycerol production (126.8 g/l)by z. ruxii were occurred at 31 degree C and initial ph 5 in the presence of 250 g/l glucose and 3 g/l urea in the production medium . Under these optimizing fermentation parameters, enhancement of glycerol production (130 g/l) were recorded when the inoculum of z. ruxii was exposed to 0.25 kGy. also, the present results showed reduction in BOD 5 levels of fermented strawberry waste.

  15. Radiation induced chemical changes of phenolic compounds in strawberries

    Energy Technology Data Exchange (ETDEWEB)

    Breitfellner, F.; Solar, S. E-mail: sonja.solar@univie.ac.at; Sontag, G

    2003-06-01

    In unirradiated strawberries four phenolic acids (gallic acid, p-coumaric acid, caffeic acid and 4-hydroxybenzoic acid), the flavonoids (+)-catechin, (-)-epicatechin and glycosides from kaempferol and quercetin were determined by reversed phase chromatography with diode array detection. Characteristic linear dose/concentration relationships were found for 4-hydroxybenzoic acid and two unidentified compounds. One of them may be usable as marker to prove an irradiation treatment.

  16. Radiation induced chemical changes of phenolic compounds in strawberries

    International Nuclear Information System (INIS)

    Breitfellner, F.; Solar, S.; Sontag, G.

    2003-01-01

    In unirradiated strawberries four phenolic acids (gallic acid, p-coumaric acid, caffeic acid and 4-hydroxybenzoic acid), the flavonoids (+)-catechin, (-)-epicatechin and glycosides from kaempferol and quercetin were determined by reversed phase chromatography with diode array detection. Characteristic linear dose/concentration relationships were found for 4-hydroxybenzoic acid and two unidentified compounds. One of them may be usable as marker to prove an irradiation treatment

  17. UV-blocking potential of oils and juices.

    Science.gov (United States)

    Gause, S; Chauhan, A

    2016-08-01

    Sunscreens are commonly used to protect the body from damage caused by UV light. Some components of organic sunscreens have been shown to pass through the skin during wear which could raise toxicity concerns for these compounds. This study explores the potential for oils and fruit and vegetable juices to be substitutes for these compounds. The absorptivity of various oils (canola oil, citronella oil, coconut oil, olive oil, soya bean oil, vitamin E, as well as aloe vera) and fruit and vegetable juices (acerola, beet, grape, orange carrot, purple carrot and raspberry) was measured in vitro. The mean absorptivity was compared with FDA-approved UV absorbers to gauge the potential of the natural products. The most promising candidates were incorporated into formulations, and the UV transmittance of a 20-μm-thick film of the formulation was measured. The formulations were also imaged by light microscopy and scanning electron microscopy. The absorptivity of oils was at least two orders of magnitude lower compared to the commercial UV blockers. The fruit juice powders were more effective at UV blocking but still showed an order of magnitude lower absorptivity compared to commercial UV blockers. The UV blocking from most natural oils is insufficient to obtain a significant UV protection. Formulations containing 50wt% purple carrot showed good UV-blocking capabilities and represent a promising ingredient for sunscreen and cosmetic applications. © 2015 Society of Cosmetic Scientists and the Société Française de Cosmétologie.

  18. Strawberry Extract’s Effects on Enterococcus faecalis and Porphyromonas gingivalis Biofilms in vitro

    Directory of Open Access Journals (Sweden)

    Armelia Sari Widyarman

    2017-09-01

    Full Text Available Background: Enterococcus faecalis (E. faecalis and Porphyromonas gingivalis (P. gingivalis are oral bacteria related to root canal infection and periodontal disease pathogenesis. Strawberries (Fragaria x ananassa fruit are rich in vitamins and minerals, have antibacterial and antioxidant effects. Objective: This study investigated the inhibition effect of strawberry extract on monospecies and multispecies E. faecalis and P. gingivalis bacteria grown as biofilms in vitro. Methods: This study used E. faecalis ATCC 29212 and P. gingivalis ATCC 33277. It analyzed the effect of strawberry extract on bacteria biofilm formation using a biofilm assay on microplate wells. Five concentrations of strawberry extracts were used (100%, 50%, 25%, 12.5%, and 6.25%, and the inhibition effect was observed after a 1h, 3h, 6h, and 24h incubation period. Biofilms without the strawberry extract were used as the negative controls, and crystal violet and safranin (0.5%w/v were used to count the biofilm mass. The biofilms grown on microplates were counted using an ELISA reader at 450 nm after 200 mL of 90% ethanol was added to attract the absorbed stain. The strawberry extract inhibition effectiveness on the biofilm formation of each bacterium tested was analyzed using one-way Anova, where p<0.05 was defined as a significant difference. Result: The strawberry extract inhibited the tested monospecies and multispecies bacteria biofilm formation. The optimal strawberry extract concentration for the inhibition of either monospecies biofilms was 100%. However, the optimal incubation time for the strawberry extract to inhibit the multispecies biofilm formation was 24h, which was the study’s biofilm maturity phase. Conclusions: The 100% strawberry extract concentration inhibited the formation of both the monospecies and multispecies E. faecalis and P. gingivalis biofilms. Future studies are needed to evaluate the potential of strawberry extract as an alternative dental

  19. Influence of silicon on production and fruit quality of strawberry

    Directory of Open Access Journals (Sweden)

    Maria Ligia Souza Silva

    2013-12-01

    Full Text Available In Brazil, the culture of strawberries is an important activity for small and medium farmers. Among the important factors for culture is fertilization, which can interfere in production and fruit quality. Silicon (Si is one of the little studied in fertilization, which demonstrated some beneficial to several different cultures. The objective of this study was to evaluate the influence of Si on production and concentration of anthocyanin and titratable acid in the fruit and reading SPAD (chlorophyll in the leaves of the strawberry. The experiment was conducted in a greenhouse using pots containing 14.5 kg of limed soil, fertilized and three plants (cultivar Milsei Tudla were transplanted to pots. Treatments consisted of application of Si at 0, 12.5, 25, 50 and 100 mg kg-1 rates, via soil or foliar. During this experiment the reading of SPAD (chlorophyll and the end of the experiment, the shoots was collected, dried, weighed, ground and analyzed by content and accumulation Si. The fruits were weighed and analyzed the concentration of anthocyanin, titratable acidity and Si concentration. The fertilization with Si, via soil or foliar applied, contributed to the increase in fruit production, especially with the application via soil. Applying foliar or soil promoted an increase in the values of titratable acidity and anthocyanins. Rates of Si via soil or foliar applied influenced the reading SPAD (chlorophyll, in the leaves. The Si independent of the form of application promoted improvements in strawberry crop.

  20. Active package for wild strawberry fruit (Fragaria vesca L.).

    Science.gov (United States)

    Almenar, Eva; Del Valle, Valeria; Catala, Ramón; Gavara, Rafael

    2007-03-21

    An antimicrobial active package has been developed to improve the safety and quality of wild strawberries, as well as extending their shelf life. The fruits were packed in equilibrium-modified atmosphere packaging (EMAP), and the effect on Botrytis cinerea growth and on the quality parameters of the fruit by the addition of different amounts of 2-nonanone, an antifungal volatile compound naturally present in strawberries, was investigated during storage at 10 and 22 degrees C. The temperature of 10 degrees C was chosen as the temperature used at points of sale, and 22 degrees C was chosen as the control temperature. Fungal growth was inhibited in all cases, possibly due to the synergistic effect of high CO2 partial pressures and the presence of the antifungal compound. Weight, soluble solids, titrable acidity, and anthocyanin losses were retarded by the presence of 2-nonanone. This effect was more pronounced as the 2-nonanone concentration was increased at both temperatures. Therefore, an active package that releases 2-nonanone inhibits fungal decay and delays the senescence of highly perishable wild strawberry fruit.

  1. Transient transformation meets gene function discovery: the strawberry fruit case

    Directory of Open Access Journals (Sweden)

    Michela eGuidarelli

    2015-06-01

    Full Text Available Beside the well known nutritional and health benefits, strawberry (Fragaria X ananassa crop draws increasing attention as plant model system for the Rosaceae family, due to the short generation time, the rapid in vitro regeneration, and to the availability of the genome sequence of F. X ananassa and of the closely related F. vesca species. In the last years, the use of high-throughput sequence technologies provided large amounts of molecular information on the genes possibly related to several biological processes of this crop. Nevertheless, the function of most genes or gene products is still poorly understood and needs investigation. Transient transformation technology provides a powerful tool to study gene function in vivo, avoiding difficult drawbacks that typically affect the stable transformation protocols, such as transformation efficiency, transformants selection and regeneration. In this review we provide an overview of the use of transient expression in the investigation of the function of genes important for strawberry fruit development, defence and nutritional properties. The technical aspects related to an efficient use of this technique are described, and the possible impact and application in strawberry crop improvement are discussed.

  2. Evaluation and public acceptance of irradiated strawberries and citrus fruits

    International Nuclear Information System (INIS)

    Del Mastro, Nelida L.; Kikuchi, Olivia K.; Villavicencio, Anna L.C.H.; Sabato, Susy F.; Rela, Paulo R.; Taipina, Magda S.; Mattiolo-Marchse, Sandra R.

    1999-01-01

    Irradiation is a physical process that can be applied to food in order to eliminate microorganisms, insects and other plagues as well as delay ripening or spoilage, thus lengthening its shelf life. In Brazil, the technique is only starting to be applied and is restricted to a few tons of dry or dehydrated food ingredients per year. Strawberry (Fragaria sp.) and citrus are usually attacked by various plagues. Both strawberry and citrus are included in the Brazilian legislation for irradiated foods. This work describes the first sensory trials of 2 varieties of strawberries and 3 varieties of citrus irradiated at IPEN. Irradiation was performed in a panoramic Co-60 source with doses ranging between 1.7 and 4 kGy. Untrained groups of panelists judged the quality of irradiated and non-irradiated control fruits. From the analysis of the results, it was concluded that there no significant differences in the characteristical properties of the fruits when they were irradiated with the doses recommended by the legislation. (author)

  3. Bradysia sp. em morangueiro Bradysia sp. in strawberry

    Directory of Open Access Journals (Sweden)

    Bernadete Radin

    2009-04-01

    Full Text Available No trabalho, relatam-se os primeiros registros de Bradysia sp. (Insecta: Diptera: Sciaridae em morangueiro (Fragaria x ananassa Duch., cultivado no Município de Eldorado do Sul, RS. O cultivo foi realizado em sacolas com três metros de comprimento, preenchidas com substrato composto de casca de arroz e turfa, dispostas horizontalmente sobre bancadas de madeira, em ambiente protegido. A presença de Bradysia sp. foi observada na segunda quinzena de agosto de 2005. Neste trabalho, estão descritos os sintomas apresentados no morangueiro pela praga, prováveis conseqüências sobre o aparecimento de doenças e uma breve descrição morfológica da Bradysia sp., adulto e fase larval.This paper describes the first record of Bradysia sp. (Insecta; Diptera; Sciaridae in strawberry (Fragaria x ananassa, cultivated in the city of Eldorado do Sul, RS, Brazil. Strawberry was planted in plastic bags filled with a mixture of burnt rice hulls and peat and cultivated in a greenhouse. The presence of Bradysia sp was noticed in the second fortnight of August, 2005. The symptoms in strawberry and the probable consequences in terms of disease arising were described in the present study, as well as the morphological characterization of Bradysia sp. and its illustrations.

  4. Breeding new improved clones for strawberry production in Brazil

    Directory of Open Access Journals (Sweden)

    Alexandre Gonçalves Galvão

    2017-04-01

    Full Text Available Breeding different strawberry genotypes and plant selection in Brazil could result in new cultivars with better environmental adaptations. The aim was to develop and select new F1 strawberry plants with higher potential yields. Twelve hybrid populations were obtained from breeding the cultivars Aromas, Camarosa, Dover, Festival, Oso Grande, Sweet Charlie and Tudla, and 42 F1 hybrids were obtained from each population. An augmented randomized block design was used. Productive traits were measured and heterosis was calculated for all traits. The breedings Dover x Aromas and Camarosa x Aromas both showed 28.6% of their hybrids with a total fruit mass that was higher than that of cv. Aromas, and 9.5 and 14.3% were higher than that of cv. Camarosa, respectively. The breeding of Camarosa x Aromas produced hybrids with high potential yields and a large average fruit mass that reached the commercial standard. Hybrids MCA12-93, MFA12-443 and MCA12-89 showed high potential yields and can be used as parents in strawberry breeding programs.

  5. Influences of the GAMMA radiation on useful life of strawberry

    International Nuclear Information System (INIS)

    Bonilla B, Ligia M.; Sepulveda P, Claudia M.

    1993-01-01

    The present investigation was carried out with the purpose of prolonging the useful life of strawberry (bird variety) by means of gamma radiation, eliminating the causing microorganisms of the deterioration of the fruit partially: aerobic mesophyll, psicrotrophos, molds and yeasts, effect that was controlled by means of the recount of the same ones. In the same way, it was carried out a quantitative analysis of some parameters such organolitics as flavor, color and hardness, to observe the behavior of the strawberry with the different applied treatments. The irradiation process was made with a source of Co-60, provided by the INEA with an activity of 82 kilo curios. The used radiation doses were 0, 1.0, 1.5, 2.0, 2.5 and 3.0 kGy, which were quantified by means of chemical dosimeter : Sulfate cupric ferrous-sulfate. Strawberries were storage under refrigeration with controlled conditions of temperature between 1 and 2 C and relative humidity of 85-90, and periodically, samples were removed for different analyses

  6. Classification of Strawberry Fruit Shape by Machine Learning

    Science.gov (United States)

    Ishikawa, T.; Hayashi, A.; Nagamatsu, S.; Kyutoku, Y.; Dan, I.; Wada, T.; Oku, K.; Saeki, Y.; Uto, T.; Tanabata, T.; Isobe, S.; Kochi, N.

    2018-05-01

    Shape is one of the most important traits of agricultural products due to its relationships with the quality, quantity, and value of the products. For strawberries, the nine types of fruit shape were defined and classified by humans based on the sampler patterns of the nine types. In this study, we tested the classification of strawberry shapes by machine learning in order to increase the accuracy of the classification, and we introduce the concept of computerization into this field. Four types of descriptors were extracted from the digital images of strawberries: (1) the Measured Values (MVs) including the length of the contour line, the area, the fruit length and width, and the fruit width/length ratio; (2) the Ellipse Similarity Index (ESI); (3) Elliptic Fourier Descriptors (EFDs), and (4) Chain Code Subtraction (CCS). We used these descriptors for the classification test along with the random forest approach, and eight of the nine shape types were classified with combinations of MVs + CCS + EFDs. CCS is a descriptor that adds human knowledge to the chain codes, and it showed higher robustness in classification than the other descriptors. Our results suggest machine learning's high ability to classify fruit shapes accurately. We will attempt to increase the classification accuracy and apply the machine learning methods to other plant species.

  7. Engineering the anthocyanin regulatory complex of strawberry (Fragaria vesca

    Directory of Open Access Journals (Sweden)

    Kui eLin-Wang

    2014-11-01

    Full Text Available The woodland strawberry, Fragaria vesca is a model fruit for a number of rosaceous crops. We have engineered altered concentrations of anthocyanin in F. vesca, to determine the impact on plant growth and fruit quality. Anthocyanin concentrations were significantly increased by over-expression or decreased by knock-down of the R2R3 MYB activator, MYB10. In contrast, a potential bHLH partner for MYB10 (bHLH33 did not affect the anthocyanin pathway when knocked down using RNAi constructs. Metabolic analysis of fruits revealed that, of all the polyphenolics surveyed, only cyanidin and pelargonidin glucoside, and coumaryl hexose were significantly affected by over-expression and knock down of MYB10. Using the F. vesca genome sequence, members of the MYB, bHLH and WD40 families were examined. Global analysis of gene expression and targeted qPCR analysis of biosynthetic genes and regulators confirmed the effects of altering MYB10 expression, as well as the knock-down of bHLH33. Other members of the MYB transcription factor family were affected by the transgenes. Transient expression of strawberry genes in Nicotiana benthamiana revealed that MYB10 can auto-regulate itself, and potential repressors of MYB10. In tobacco, MYB10’s activation of biosynthetic steps is inhibited by the strawberry repressor MYB1.

  8. Induced Mutation in Strawberry by Using Gamma Radiation

    International Nuclear Information System (INIS)

    Phadvibulya, Valailak; Puripanyavanich, Vichai; Pipattanawongse, Narongchai; Yeesawasdi, Voravit; Teja, Waich

    2003-12-01

    The culture of strawberry plants variety Tio ga were irradiated with gamma rays at doses of 0, 20, 40, 60, 80, 100,120 and 140 Gy. They were transferred to the MS medium supplemented with BA 0.1 mg/l. It was found that radiation dose which caused 50% lethality (LD 50 ) was 80 Gy. The survival plants were transferred to rooting medium (MS medium) and then transplanted to field for stolon production and yield investigation. Two lines with good fruit quality were obtained after selection till M 1 V 5 . They were planted for further testing. In experiment II, The culture of strawberry plants varieties Royal 20, Royal 70, SM and Dover were irradiated with gamma rays at doses of 0, 40 and 60 Gy. They were transplanted to field for stolon and yield production. Three lines from Royal 70 were obtained after selection till M 1 V 4 . In experiment III, the culture of strawberry plants varieties Royal 20, Royal 50, Royal 70, Nyoho and Selva were irradiated with gamma rays at the same doses as experiment II. Nine lines from Royal 70 and four lines from Nyoho with good characters were selected for further testing

  9. 21 CFR 146.140 - Pasteurized orange juice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Pasteurized orange juice. 146.140 Section 146.140... and Beverages § 146.140 Pasteurized orange juice. (a) Pasteurized orange juice is the food prepared from unfermented juice obtained from mature oranges as specified in § 146.135, to which may be added...

  10. 21 CFR 146.151 - Orange juice for manufacturing.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Orange juice for manufacturing. 146.151 Section... Fruit Juices and Beverages § 146.151 Orange juice for manufacturing. (a) Orange juice for manufacturing... from oranges as provided in § 146.135, except that the oranges may deviate from the standards for...

  11. 21 CFR 146.150 - Canned concentrated orange juice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Canned concentrated orange juice. 146.150 Section... Fruit Juices and Beverages § 146.150 Canned concentrated orange juice. (a) Canned concentrated orange... labeling of ingredients prescribed for frozen concentrated orange juice by § 146.146, except that it is not...

  12. 21 CFR 146.154 - Concentrated orange juice with preservative.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Concentrated orange juice with preservative. 146... Canned Fruit Juices and Beverages § 146.154 Concentrated orange juice with preservative. (a) Concentrated orange juice with preservative complies with the requirements for composition and labeling of optional...

  13. Effect of Processing on the Quality of Pineapple Juice

    NARCIS (Netherlands)

    Hounhouigan, M.H.; Linnemann, A.R.; Soumanou, M.M.; Boekel, van M.A.J.S.

    2014-01-01

    Pineapple processing plays an important role in juice preservation. Because the quality of the pineapple juice is affected by the processing technology applied, the effects of pasteurization and other preservation methods on the overall juice quality were discussed. During juice processing,

  14. 76 FR 8997 - Notice of Decision To Issue Permits for the Importation of Fresh Strawberries From Jordan Into...

    Science.gov (United States)

    2011-02-16

    ...] Notice of Decision To Issue Permits for the Importation of Fresh Strawberries From Jordan Into the... continental United States of fresh strawberries from Jordan. Based on the findings of a pest risk analysis... strawberries from Jordan. DATES: Effective Date: February 16, 2011. FOR FURTHER INFORMATION CONTACT: Ms. Donna...

  15. 75 FR 62500 - Notice of Availability of a Pest Risk Analysis for the Importation of Fresh Strawberries From Jordan

    Science.gov (United States)

    2010-10-12

    ...] Notice of Availability of a Pest Risk Analysis for the Importation of Fresh Strawberries From Jordan... importation into the continental United States of fresh strawberries from Jordan. Based on this analysis, we... importation of fresh strawberries from Jordan. We are making the pest risk analysis available to the public...

  16. Fruits, vegetables, 100% juices, and cognitive function.

    Science.gov (United States)

    Lamport, Daniel J; Saunders, Caroline; Butler, Laurie T; Spencer, Jeremy Pe

    2014-12-01

    Although reviews of the association between polyphenol intake and cognition exist, research examining the cognitive effects of fruit, vegetable, and juice consumption across epidemiological and intervention studies has not been previously examined. For the present review, critical inclusion criteria were human participants, a measure of fruit, vegetable, or 100% juice consumption, an objective measure of cognitive function, and a clinical diagnosis of neuropsychological disease. Studies were excluded if consumption of fruits, vegetables, or juice was not assessed in isolation from other food groups, or if there was no statistical control for education or IQ. Seventeen of 19 epidemiological studies and 3 of 6 intervention studies reported significant benefits of fruit, vegetable, or juice consumption for cognitive performance. The data suggest that chronic consumption of fruits, vegetables, and juices is beneficial for cognition in healthy older adults. The limited data from acute interventions indicate that consumption of fruit juices can have immediate benefits for memory function in adults with mild cognitive impairment; however, as of yet, acute benefits have not been observed in healthy adults. Conclusions regarding an optimum dietary intake for fruits, vegetables, and juices are difficult to quantify because of substantial heterogeneity in the categorization of consumption of these foods. © 2014 International Life Sciences Institute.

  17. 21 CFR 146.141 - Canned orange juice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Canned orange juice. 146.141 Section 146.141 Food... Beverages § 146.141 Canned orange juice. (a) Canned orange juice is the food prepared from orange juice as specified in § 146.135 or frozen orange juice as specified in § 146.137, or a combination of both, to which...

  18. An overview on the Brazilian orange juice production chain

    OpenAIRE

    Renato Marcio dos Santos; Irenilza de Alencar Nääs; Mario Mollo Neto; Oduvaldo Vendrametto

    2013-01-01

    Brazil is the world's largest producer of oranges and uses more than 70% of the harvested fruits in the production of juices. The amount of processed orange is growing about 10% per year, confirming the trend of the Brazilian citrus for juice production. This research aimed to investigate the Brazilian orange juice production chain from 2005 to 2009. Data from the amount of frozen juice produced and exported, international price of orange juice, and intermediate transactions were assessed in ...

  19. Strawberry: Fast and accurate genome-guided transcript reconstruction and quantification from RNA-Seq.

    Science.gov (United States)

    Liu, Ruolin; Dickerson, Julie

    2017-11-01

    We propose a novel method and software tool, Strawberry, for transcript reconstruction and quantification from RNA-Seq data under the guidance of genome alignment and independent of gene annotation. Strawberry consists of two modules: assembly and quantification. The novelty of Strawberry is that the two modules use different optimization frameworks but utilize the same data graph structure, which allows a highly efficient, expandable and accurate algorithm for dealing large data. The assembly module parses aligned reads into splicing graphs, and uses network flow algorithms to select the most likely transcripts. The quantification module uses a latent class model to assign read counts from the nodes of splicing graphs to transcripts. Strawberry simultaneously estimates the transcript abundances and corrects for sequencing bias through an EM algorithm. Based on simulations, Strawberry outperforms Cufflinks and StringTie in terms of both assembly and quantification accuracies. Under the evaluation of a real data set, the estimated transcript expression by Strawberry has the highest correlation with Nanostring probe counts, an independent experiment measure for transcript expression. Strawberry is written in C++14, and is available as open source software at https://github.com/ruolin/strawberry under the MIT license.

  20. Manipulating transplant morphology to advance post-transplant growth and yield in strawberry

    NARCIS (Netherlands)

    Reekie, J.Y.

    2005-01-01

    Two methods were developed to enhance transplant success and minimize water use of strawberry transplants harvested in Canadian nurseries for use in the annual strawberry production system in the Southern United States: mechanical leaf removal by mowing, and chemical control of growth and

  1. Towards consumer-friendly cisgenic strawberries which are less susceptible to Botrytis cinerea

    NARCIS (Netherlands)

    Schaart, J.G.

    2004-01-01

    This thesis describes the development of genetically modified (GM) strawberries which are less susceptible to fruit rot caused by the fungus Botrytis cinerea. To achieve Botrytis resistance, a polygalacuronase inhibiting protein (PGIP) gene has been isolation from strawberry and was characterised.

  2. A study of the synergetic effect of strawberry γ-ray radiation

    International Nuclear Information System (INIS)

    Xu Shihong; Zhu Zhaodi

    1990-01-01

    The change of commerical strawberry quality during storage period was studied. The shelf lifetimes of irradiated strawberries by the single radiation means using 1 kGy, 2 kGy or 3 kGy doses are not longer than that of the storage in icebox. However, the study indicated taht the synergetic effect could be produced by combine radiation means with icebox

  3. Identification of food preserved by ionizing radiation; Preliminary tests in strawberries using thermoluminescent (TL)

    International Nuclear Information System (INIS)

    Rubio, T.; Sillano, O.; Espinoza, J.; Roman, A.; Deza, A.

    1992-01-01

    TL measurements, of irradiated and unirradiated strawberries were carried out, using peel, seeds (achenes), leaves and sediment. The four types of samples presented a different thermoluminescence response. The best results were obtained with sediment removed from the soil of the fruit surface. It is concluded that TL is a promising technique for detecting irradiated strawberries using sediment samples. (author)

  4. Processing factors and variability of pyrimethanil, fenhexamid and tolylfluanid in strawberries

    DEFF Research Database (Denmark)

    Christensen, Hanne Bjerre; Granby, Kit; Rabølle, M.

    2003-01-01

    An HPLC-MS/MS method for the analysis of three pesticides in strawberries was developed and validated. Recoveries were measured at three spiking levels and ranged from 85 to 99% (mean recoveries). The effects of processing of strawberries ranging from rinsing to jam production were investigated...

  5. Genes for and molecular markers linked with resistance to Phytophthora fragariae in strawberry

    NARCIS (Netherlands)

    Weg, van de W.E.; Henken, B.; Haymes, K.M.; Nijs, den A.P.M.

    1998-01-01

    A gene-for-gene model is presented which explains interactions between cultivars of strawberry and races of Phytophthora fragariae var. fragariae, the causal agent of red core (red stele) root rot. The model allows the constitution of a universal differential set of strawberry genotypes and the

  6. CATT as a non-chemical pest and nematode control method in strawberry mohter planting stock

    NARCIS (Netherlands)

    Kruistum, van G.; Hoek, J.; Verschoor, J.A.

    2014-01-01

    Until 2008 methyl bromide (MeBr) was used in The Netherlands for fumigation of strawberry runners, intended as mother planting stock, to make them free of contamination by strawberry tarsonemid mites (Phytonemus pallidus). As an alternative of MeBr fumigation a 48 h CATT method was developed and

  7. Characteristics of growing media mixes and application for open-field production of strawberry (Fragaria ananassa)

    Science.gov (United States)

    Pathogen-free growing media are widely used for strawberry production in protected structures in Europe but not common in the United States. There is a need to investigate the feasibility of producing strawberry fruits in open fields with the pathogen-free media in the U.S. The objective of the stud...

  8. Pasteurization of strawberry puree using a pilot plant pulsed electric fields (PEF) system

    Science.gov (United States)

    The processing of strawberry puree by pulsed electric fields (PEF) in a pilot plant system has never been evaluated. In addition, a method does not exist to validate the exact number and shape of the pulses applied during PEF processing. Both buffered peptone water (BPW) and fresh strawberry puree (...

  9. Effect of ion beam irradiation of fresh-keeping of strawberry

    International Nuclear Information System (INIS)

    Lei Qing; Huang Min; Wu Ling; Mo Yan; Du Xiaoying; Xie Yan; Wang Yan; Gao Peng; Kang Ju

    2011-01-01

    Effects of ion beam irradiation on strawberry quality were studied, in this study and microbial biomass, decay index, weight loss and biological index were detected. Irradiation dosage were 1.0, 2.0 and 3.0 kGy. The results showed that the irradiation decreased the number of microorganism in the strawberry and delayed the rotten speed. The soluble solide, Vc and total acid content of irradiated strawberry reduced slower than that of control. It indicated that the irradiation dosage did not affect the quality of strawberry in this study . Therefore, 2.0 ∼ 3.0 kGy of ion beam irradiation were an excellent irradiation dosage for strawberry preservation. (authors)

  10. Characterization of microbial communities and fungal metabolites on field grown strawberries from organic and conventional production

    DEFF Research Database (Denmark)

    Jensen, Birgit; Knudsen, Inge M. B.; Andersen, Birgitte

    2013-01-01

    The background levels of culturable indigenous microbial communities (microbiotas) on strawberries were examined in a field survey with four conventional and four organic growers with different production practise and geographic distribution. The microbiota on apparently healthy strawberries...... was complex including potential plant pathogens, opportunistic human pathogens, plant disease biocontrol agents and mycotoxin producers. The latter group was dominated by Penicillium spp. and Aspergillus niger was also isolated. As expected, bacteria were the most abundant and diverse group of the strawberry...... microbiota followed by yeasts and filamentous fungi. No obvious correlation between grower practice and the strawberry microbiota was observed. Differences between microbiotas on strawberries from conventional systems with up to 10 fungicide spray treatments and organic production systems were insignificant...

  11. Data on body weight and liver functionality in aged rats fed an enriched strawberry diet

    Directory of Open Access Journals (Sweden)

    Francesca Giampieri

    2017-08-01

    Full Text Available Here, we present new original data on the effects of strawberry consumption on body weight and liver status of aged rats. Wistar rats aged 19–21 months were fed a strawberry enriched diet prepared by substituting 15% of the total calories with freeze-dried strawberry powder for two months. Body weight, plasma biomarkers of liver injury (alanine transferase, aspartate aminotransferase and alkaline phosphatase and liver histological analysis were assessed. These data indicate that strawberry supplementation did not interfere with normal animal maintenance and with liver structure and functionality. For further details and experimental findings please refer to the article “Strawberry consumption improves aging-associated impairments, mitochondrial biogenesis and functionality through the AMP-Activated Protein Kinase signaling cascade” in FOOD CHEMISTRY (Giampieri et al., 2017 [1].

  12. Identifying Key Flavors in Strawberries Driving Liking via Internal and External Preference Mapping.

    Science.gov (United States)

    Oliver, Penelope; Cicerale, Sara; Pang, Edwin; Keast, Russell

    2018-04-01

    Australian consumers desire the development of a more flavorsome Australian strawberry cultivar. To aid in the development of well-liked strawberries, the attributes driving liking need to be identified. The objective of this research is to apply Preference Mapping (PM) techniques to the descriptive profile of commercial and newly bred strawberry cultivars, together with consumer preference data to determine the flavors contributing to liking. A trained sensory panel (n = 12) used Quantitative Descriptive Analysis (QDA®) methodology to evaluate two appearance, seven aroma, five texture, 10 flavor and 10 aftertaste attributes of three commercial strawberry cultivars and six elite breeding lines grown in Victoria, Australia. Strawberry consumers (n = 150) assessed their liking of the same strawberry cultivars. QDA® significantly discriminated strawberries on 28 of the 34 sensory attributes. There were significant differences in hedonic ratings of strawberries (F(8,714) = 11.5, P = 0.0001), with Hierarchical Cluster Analysis (HCA) identifying three consumer clusters each displaying differing patterns of preference. Internal and external PM techniques were applied to the data to identify the attributes driving consumer acceptability. Sweet, berry, caramel, fruity and floral attributes were identified as most contributing to liking. Sour, citrus, green, astringent, firm and gritty attributes were conversely associated with a reduction in consumer liking. Elite Lines 2 and 6 have been identified as having the broadest appeal, satisfying between 60% and 70% of consumers in the population assessed, thus the introduction of these cultivars should satisfy the largest group of consumers in the Australian market. The results of this research could be applied to breeding programs, to ensure newly bred cultivars express characteristics that were identified as well-liked amongst consumers. In addition, this research provides evidence for marketing strawberries by

  13. Spray Drying of Mosambi Juice in Lab

    Science.gov (United States)

    Singh, S. V.; Verma, A.

    2014-01-01

    The studies on spray drying of mosambi juice were carried out with Laboratory spray dryer set-up (LSD-48 MINI SPRAY DRYER-JISL). Inlet and outlet air temperature and maltodextrin (drying agent) concentration was taken as variable parameters. Experiments were conducted by using 110 °C to 140 °C inlet air temperature, 60 °C to 70 °C outlet air temperature and 5-7 % maltodextrin concentration. The free flow powder of mosambi juice was obtained with 7 % maltodextrin at 140 °C inlet air temperature and 60 °C outlet air temperature. Fresh and reconstituted juices were evaluated for vitamin C, titrable acidity and sensory characteristics. The reconstituted juice was found slightly acceptable by taste panel.

  14. Experimental Study on Gastric Juice Secretion by ...

    African Journals Online (AJOL)

    管理平台

    2012-05-29

    May 29, 2012 ... Study on stomach physiological functions by ... mechanism of regulating gastric electrical activity and gastric juice secretion might become true by the .... samples was used in comparism among these different groups.

  15. 21 CFR 146.114 - Lemon juice.

    Science.gov (United States)

    2010-04-01

    ... food. The lemon oil and lemon essence (derived from lemons) content may be adjusted in accordance with... juice, as defined in this paragraph, may be preserved by heat sterilization (canning), refrigeration...

  16. Effect of lemon juice on blood pressure

    OpenAIRE

    SARI, Aysel; SELİM, Nevzat; DİLEK, Melda; AYDOĞDU, Turkan; ADIBELLİ, Zelal; BÜYÜKKAYA, Piltan; AKPOLAT, Tekin

    2012-01-01

    Lemon juice has commonly been used by hypertensive patients in order to lower blood pressure (BP) acutely when BP is raised or as an alternative/complementary therapy for expectation of chronic improvement. Grapefruit, a citrus fruit like lemon, causes clinically significant interactions with a variety of drugs including calcium antagonists. The aims of this study were to investigate acute and chronic effects of lemon juice on BP among hypertensive patients. Ninty-eight patients were included...

  17. The effective use of acai juice, blueberry juice and pineapple juice as negative contrast agents for magnetic resonance cholangiopancreatography in children

    International Nuclear Information System (INIS)

    Bittman, Mark E.; Callahan, Michael J.

    2014-01-01

    Magnetic resonance cholangiopancreatography (MRCP) is commonly performed in the evaluation of known or suspected pancreaticobiliary disease in children. The administration of a negative oral contrast agent can improve the quality of the examination without significant additional cost. We describe our experience with certain brands of acai juice, blueberry juice and pineapple juice as negative oral contrast agents in children. We believe these fruit juices are safe, palatable and may improve MRCP image quality. (orig.)

  18. The effective use of acai juice, blueberry juice and pineapple juice as negative contrast agents for magnetic resonance cholangiopancreatography in children

    Energy Technology Data Exchange (ETDEWEB)

    Bittman, Mark E. [Cohen Children' s Medical Center of New York, North Shore Long Island Jewish Health System, Department of Radiology, New Hyde Park, NY (United States); Callahan, Michael J. [Boston Children' s Hospital, Department of Radiology, Boston, MA (United States)

    2014-07-15

    Magnetic resonance cholangiopancreatography (MRCP) is commonly performed in the evaluation of known or suspected pancreaticobiliary disease in children. The administration of a negative oral contrast agent can improve the quality of the examination without significant additional cost. We describe our experience with certain brands of acai juice, blueberry juice and pineapple juice as negative oral contrast agents in children. We believe these fruit juices are safe, palatable and may improve MRCP image quality. (orig.)

  19. In-house method validation and occurrence of alpha-, beta-endosulfan, endosulfan sulphate, lambda-cyhalothrin, procymidone and trifluralin residues in strawberry

    Directory of Open Access Journals (Sweden)

    Alexandre Augusto Soares

    2013-12-01

    Full Text Available A method for determination of organohalogen pesticides in strawberry by gas chromatography with electron capture detection was validated and applied in a monitoring program. Linearity, matrix effects, and day effect were evaluated for the analytes alpha-endosulfan, beta-endosulfan, endosulfan sulphate, lambda-cyhalothrin, procymidone, and trifluralin. The linear range varied according to the chromatographic response of the analyte. Significant matrix effects were observed. The mean recoveries ranged from 74.6 to 115.4%, with repeatability standard deviations between 1.6 and 21.0% and intermediate precision between 5.9 and 21.0%. Detection, quantification and decision limit, and detection capacity ranged from 0.003 to 0.007 mg/kg, 0.005 to 0.013 mg/kg; 0.003 to 3.128 mg/kg; and 0.005 to 3.266 mg/kg, respectively. The method was fit for the purpose of monitoring organohalogen residues in strawberries. Residues of these pesticides were detected in 124 of the 186 samples analyzed between 2009 and 2011 in the state of Minas Gerais. Nine of them did not comply with the current legislation requirements; among them, seven (3.8% had residues of unauthorized pesticide for the culture of strawberry, one (0.5% had residues above the maximum residue limit, and another one (0.5% exhibited both non-conformities.

  20. Floral markers of strawberry tree (Arbutus unedo L.) honey.

    Science.gov (United States)

    Tuberoso, Carlo I G; Bifulco, Ersilia; Caboni, Pierluigi; Cottiglia, Filippo; Cabras, Paolo; Floris, Ignazio

    2010-01-13

    Strawberry tree honey, due to its characteristic bitter taste, is one of the most typical Mediterranean honeys, with Sardinia being one of the largest producers. According to specific chemical studies, homogentisic acid was identified as a possible marker of this honey. This work, based on HPLC-DAD-MS/MS analysis of strawberry tree (Arbutus unedo L.) honeys, previously selected by sensory evaluation and melissopalynological analysis, showed that, in addition to the above-mentioned acid, there were other high levels of substances useful for the botanical classification of this unifloral honey. Two of these compounds were isolated and identified as (+/-)-2-cis,4-trans-abscisic acid (c,t-ABA) and (+/-)-2-trans,4-trans-abscisic acid (t,t-ABA). A third compound, a new natural product named unedone, was characterized as an epoxidic derivative of the above-mentioned acids. Structures of c,t-ABA, t,t-ABA, and unedone were elucidated on the basis of extensive 1D and 2D NMR experiments, as well as HPLC-MS/MS and Q-TOF analysis. In selected honeys the average amounts of c,t-ABA, t,t-ABA, and unedone were 176.2+/-25.4, 162.3+/-21.1, and 32.9+/-7.1 mg/kg, respectively. Analysis of the A. unedo nectar confirmed the floral origin of these compounds found in the honey. Abscisic acids were found in other unifloral honeys but not in such high amount and with a constant ratio of about 1:1. For this reason, besides homogentisic acid, these compounds could be used as complementary markers of strawberry tree honey.

  1. Irradiation of strawberries and tomatoes - chemical changes, marker compound

    International Nuclear Information System (INIS)

    Breitfellner, F.; Schindler, M.; Solar, S.; Sontag, G.

    2003-01-01

    The objective of this study was directed to the detection of radiation induced chemical changes in strawberries and tomatoes. The investigations were focused on polyphenols (phenolic acids and flavonoids). These compounds, which are present in minor amounts [low ppm-range (mg/kg)], are part of the bioactive substances and have anticancerogenic, antimicrobial and antioxidative properties. Determination of polyphenols occurred by HPLC with diode array and/or coulometric electrode array detection. In strawberries 15 phenolic compounds could be detected. Upon irradiation (1-6 kGy) five were decreasing and one was increasing with dose, nine remained unaffected /1, 2/. In tomatoes five phenolic components could be identified, three of them decreased markedly with irradiation. In unirradiated samples of both foods the content of phenolic derivatives varied significantly, depending on variety, origin and degree of ripeness. Since these differences were in the same range as the radiation induced chemical changes, it could be concluded that irradiation does not reduce food quality based on the phenolic components. In strawberries a substance was detected which may be used as marker to prove an irradiation treatment. Its zero dose level is insignificant yet its concentration showed a linear increase with dose, it trebled at 3 kGy and quintupled at 6 kGy. Due to its presence in very low concentration (<1ppm) the chemical structure could not yet been determined. MS/MS analysis proved a molecular weight of m/z 318 as well as characteristic fragments of m/z 197, 165, 137, 93. On the basis of the UV-VIS spectrum (absorption maximum 265 nm) it can not be attributed to flavonoids, ellagic acids or cinnamic acid derivatives

  2. Tomato juices and tomato juice concentrates : a study of factors contributing to their gross viscosity

    NARCIS (Netherlands)

    Heutink, R.

    1986-01-01

    The gross viscosity of tomato juice and tomato juice concentrates was found to be determined primarily by the water insoluble solids (WIS) content. The serum viscosity did not contribute to gross viscosity. The WIS consisted of whole tomato cells, vascular bundles and skin fragments. In general the

  3. Wild Bee Community Composition and Foraging Behaviour in Commercial Strawberries

    DEFF Research Database (Denmark)

    Ahrenfeldt, Erica Juel

    possibly due to the low biodiversity offered by many commercially driven, single species, Danish forests. At field scale (I) bee species richness was higher in field margins compared to field centres but there was no difference between centre and margin in body-size or activity-density. Sampling time had...... an effect on wild bee community composition with higher activity-density and species richness in late May and late June than in early and mid-June (II). Results thus indicate that functional diversity of visiting wild bee assemblages in strawberry differs depending on the spatial and time scale...

  4. Improved regeneration and transformation protocols for three strawberry cultivars

    Science.gov (United States)

    Zakaria, Hossam; Hussein, Gihan M; Abdel-Hadi, Abdel-Hadi A; Abdallah, Naglaa A

    2014-01-01

    Strawberry (Fragaria × ananassa) is an economically important soft fruit crop with polyploid genome which makes the breeding of new cultivars difficult. Simple and efficient method for transformation and regeneration is required for cultivars improvement in strawberry. In the present study, adventitious shoot regeneration has been investigated in three cultivated strawberry plants, i.e., Festival, Sweet Charly and Florida via direct organogenesis using the in vitro juvenile leaves as explants. Explants were collected after sub-culturing on a propagation medium composed of MS supplemented with 0.5 mg/l BA; 0.1 mg/l GA3 and 0.1 mg/l IBA. To select the suitable organogenesis, the explants of the three cultivars were cultured on MS medium supplemented with different concentrations of TDZ (1, 2, 3, and 4 mg/l), then incubated at a temperature of 22 °C ± 2. Medium containing 2 mg/l TDZ revealed the best regeneration efficiency with the three cultivars (72% for Festival, and 73% for Sweet Charly and Florida). After 4 weeks, the produced shoots were cultured on MS medium with different concentrations of BA and Kin to enhance shoot elongation. Results showed that the medium containing 1.5 mg/l BA and 0.5 mg/l Kin revealed highest elongation efficiency (88% and 94%) for Festival and Sweet Charly, respectively. On the other hand, medium containing 1.5 mg/l BA and 0.1 mg/l Kin showed highest elongation efficiency (90%) in Florida. Elongated shoots were successfully rooted on MS medium containing 1.5 mg/l NAA. Furthermore, transformation of the two cultivars, Festival and Sweet Charly, has been established via Agrobacterium strain LBA44404 containing the plasmid pISV2678 with gus-intron and bar genes. Three days post co-cultivation, GUS activity was screening using the histochemical assay. The results showed 16% and 18% of the tested plant materials has changed into blue color for Festival and Sweet Charly, respectively. Out of 120 explants only 13 shoots were developed on

  5. Detecting irradiation of strawberries by means of thermoluminescence measurement

    International Nuclear Information System (INIS)

    Heide, L.; Guggenberger, R.; Boegl, K.W.

    1989-01-01

    Investigations into the origin of the thermoluminescence (TL) have shown that this effect is due to trace amounts of mineral particulates adhering to the irradiated material. This result and own experience have led to the development of the TL-based method for post-factum detection of an irradiation of strawberries. In addition to the analysis of whole fruits, a method has been tested that proceeds via separation of adhering matter to separate TL analysis of the particulates. The results obtained so far show no difference or improvement as compared to whole-fruit TL analysis. (orig./MG) [de

  6. Over-expression of Gene FaASR Promotes Strawberry Fruit Coloring

    Directory of Open Access Journals (Sweden)

    Liu Zhongjie

    2015-11-01

    Full Text Available Fruit development and ripening is a complicate process. Although much progress has been made on the ripenig process, the molecular mechamism of fruit development is not yet clear. In this study, we used ‘Sweet Charlie’ strawberry as test materials, based on cloning the strawberries ASR homologous gene, we carried out the bioinformatics and temporal expression analysis of FaASR, by manipulating ASR gene expression level in strawberry fruit, we tested the changes of physiological indicators, including sugar, ABA, pigments content, and fruit firmness, as well as phenotypic changes. In addition, we measured the expression changes of some anthocyanin-related gene, such as CHS and UFGT, by which we revealed the regulation mechanisms of ASR gene over strawberry fruit ripening. Strawberry ASR contained a typical domain of ABA/WDS that was related to fruit ripening and stress-resistance, and ASR gene over-expression could promote strawberry fruit coloring, endogenous ABA and sucrose accumulation, fruit softening, and induced the transcription levels of anthocyanin-related genes CHS and UFGT. The present study will further reveal the molecular mechanisms of information transmission in fruit development, and will also play an important foundation for future molecular improvement of strawberries breeding.

  7. Influence of Fermentation Process on the Anthocyanin Composition of Wine and Vinegar Elaborated from Strawberry.

    Science.gov (United States)

    Hornedo-Ortega, Ruth; Álvarez-Fernández, M Antonia; Cerezo, Ana B; Garcia-Garcia, Isidoro; Troncoso, Ana M; Garcia-Parrilla, M Carmen

    2017-02-01

    Anthocyanins are the major polyphenolic compounds in strawberry fruit responsible for its color. Due to their sensitivity, they are affected by food processing techniques such as fermentation that alters both their chemical composition and organoleptic properties. This work aims to evaluate the impact of different fermentation processes on individual anthocyanins compounds in strawberry wine and vinegar by UHPLC-MS/MS Q Exactive analysis. Nineteen, 18, and 14 anthocyanin compounds were identified in the strawberry initial substrate, strawberry wine, and strawberry vinegar, respectively. Four and 8 anthocyanin compounds were tentatively identified with high accuracy for the 1st time to be present in the beverages obtained by alcoholic fermentation and acetic fermentation of strawberry, respectively. Both, the total and the individual anthocyanin concentrations were decreased by both fermentation processes, affecting the alcoholic fermentation to a lesser extent (19%) than the acetic fermentation (91%). Indeed, several changes in color parameters have been assessed. The color of the wine and the vinegar made from strawberry changed during the fermentation process, varying from red to orange color, this fact is directly correlated with the decrease of anthocyanins compounds. © 2017 Institute of Food Technologists®.

  8. Effects of Dietary Strawberry Supplementation on Antioxidant Biomarkers in Obese Adults with Above Optimal Serum Lipids

    Directory of Open Access Journals (Sweden)

    Arpita Basu

    2016-01-01

    Full Text Available Berries have shown several cardiovascular health benefits and have been associated with antioxidant functions in experimental models. Clinical studies are limited. We examined the antioxidant effects of freeze-dried strawberries (FDS in adults [n=60; age: 49±10 years; BMI: 36±5 kg/m2 (mean ± SD] with abdominal adiposity and elevated serum lipids. Participants were randomized to one of the following arms: low dose strawberry (25 g/day FDS, low dose control beverage (LD-C, high dose strawberry (50 g/d FDS, and high dose control beverage (HD-C for 12 weeks. Control beverages were matched for calories and total fiber. Plasma antioxidant capacity, trace elements (copper, iron, selenium, and zinc, whole blood glutathione (GSH, and enzyme activity (catalase, glutathione peroxidase, and glutathione reductase were examined at screening (0 week and after 12 weeks’ intervention. At 12 weeks, plasma antioxidant capacity and glutathione levels were higher in the strawberry versus control groups (low and high dose FDS: 45% and 42% for plasma antioxidant capacity and 28% and 36% for glutathione, resp.; glutathione was higher in the high versus low dose strawberry group (all p<0.05. Serum catalase activity was higher in the low dose strawberry (43% versus control group (p<0.01. No differences were noted in plasma trace elements and glutathione enzyme activity. Dietary strawberries may selectively increase plasma antioxidant biomarkers in obese adults with elevated lipids.

  9. Pathogenic and Nonpathogenic Lifestyles in Colletotrichum acutatum from Strawberry and Other Plants.

    Science.gov (United States)

    Freeman, S; Horowitz, S; Sharon, A

    2001-10-01

    ABSTRACT Anthracnose is one of the major fungal diseases of strawberry occurring worldwide. In Israel, the disease is caused primarily by the species Colletotrichum acutatum. The pathogen causes black spot on fruit, root necrosis, and crown rot resulting in mortality of transplants in the field. The host range and specificity of C. acutatum from strawberry was examined on pepper, eggplant, tomato, bean, and strawberry under greenhouse conditions. The fungus was recovered from all plant species over a 3-month period but caused disease symptoms only on strawberry. Epiphytic and endophytic (colonization) fungal growth in the different plant species was confirmed by reisolation from leaf tissues and by polymerase chain reaction (PCR)-specific primer amplification. C. acutatum was also isolated from healthy looking, asymptomatic plants of the weed genera Vicia and Conyza. Isolates that were recovered from the weeds caused disease symptoms on strawberry and were positively identified as C. acutatum by PCR. The habitation of a large number of plant species, including weeds, by C. acutatum suggests that, although it causes disease only on strawberry and anemone in Israel, this fungus can persist on many other plant species. Therefore, plants that are not considered hosts of C. acutatum may serve as a potential inoculum source for strawberry infection and permit survival of the pathogen between seasons.

  10. Direct and Pollinator-Mediated Effects of Herbivory on Strawberry and the Potential for Improved Resistance

    Directory of Open Access Journals (Sweden)

    Anne Muola

    2017-05-01

    Full Text Available The global decline in pollinators has partly been blamed on pesticides, leading some to propose pesticide-free farming as an option to improve pollination. However, herbivores are likely to be more prevalent in pesticide-free environments, requiring knowledge of their effects on pollinators, and alternative crop protection strategies to mitigate any potential pollination reduction. Strawberry leaf beetles (SLB Galerucella spp. are important strawberry pests in Northern Europe and Russia. Given that SLB attack both leaf and flower tissue, we hypothesized pollinators would discriminate against SLB-damaged strawberry plants (Fragaria vesca, cultivar ‘Rügen’, leading to lower pollination success and yield. In addition we screened the most common commercial cultivar ‘Rügen’ and wild Swedish F. vesca genotypes for SLB resistance to assess the potential for inverse breeding to restore high SLB resistance in cultivated strawberry. Behavioral observations in a controlled experiment revealed that the local pollinator fauna avoided strawberry flowers with SLB-damaged petals. Low pollination, in turn, resulted in smaller more deformed fruits. Furthermore, SLB-damaged flowers produced smaller fruits even when they were hand pollinated, showing herbivore damage also had direct effects on yield, independent of indirect effects on pollination. We found variable resistance in wild woodland strawberry to SLB and more resistant plant genotypes than the cultivar ‘Rügen’ were identified. Efficient integrated pest management strategies should be employed to mitigate both direct and indirect effects of herbivory for cultivated strawberry, including high intrinsic plant resistance.

  11. Strawberry flavor: diverse chemical compositions, a seasonal influence, and effects on sensory perception.

    Science.gov (United States)

    Schwieterman, Michael L; Colquhoun, Thomas A; Jaworski, Elizabeth A; Bartoshuk, Linda M; Gilbert, Jessica L; Tieman, Denise M; Odabasi, Asli Z; Moskowitz, Howard R; Folta, Kevin M; Klee, Harry J; Sims, Charles A; Whitaker, Vance M; Clark, David G

    2014-01-01

    Fresh strawberries (Fragaria x ananassa) are valued for their characteristic red color, juicy texture, distinct aroma, and sweet fruity flavor. In this study, genetic and environmentally induced variation is exploited to capture biochemically diverse strawberry fruit for metabolite profiling and consumer rating. Analyses identify fruit attributes influencing hedonics and sensory perception of strawberry fruit using a psychophysics approach. Sweetness intensity, flavor intensity, and texture liking are dependent on sugar concentrations, specific volatile compounds, and fruit firmness, respectively. Overall liking is most greatly influenced by sweetness and strawberry flavor intensity, which are undermined by environmental pressures that reduce sucrose and total volatile content. The volatile profiles among commercial strawberry varieties are complex and distinct, but a list of perceptually impactful compounds from the larger mixture is better defined. Particular esters, terpenes, and furans have the most significant fits to strawberry flavor intensity. In total, thirty-one volatile compounds are found to be significantly correlated to strawberry flavor intensity, only one of them negatively. Further analysis identifies individual volatile compounds that have an enhancing effect on perceived sweetness intensity of fruit independent of sugar content. These findings allow for consumer influence in the breeding of more desirable fruits and vegetables. Also, this approach garners insights into fruit metabolomics, flavor chemistry, and a paradigm for enhancing liking of natural or processed products.

  12. Strawberry flavor: diverse chemical compositions, a seasonal influence, and effects on sensory perception.

    Directory of Open Access Journals (Sweden)

    Michael L Schwieterman

    Full Text Available Fresh strawberries (Fragaria x ananassa are valued for their characteristic red color, juicy texture, distinct aroma, and sweet fruity flavor. In this study, genetic and environmentally induced variation is exploited to capture biochemically diverse strawberry fruit for metabolite profiling and consumer rating. Analyses identify fruit attributes influencing hedonics and sensory perception of strawberry fruit using a psychophysics approach. Sweetness intensity, flavor intensity, and texture liking are dependent on sugar concentrations, specific volatile compounds, and fruit firmness, respectively. Overall liking is most greatly influenced by sweetness and strawberry flavor intensity, which are undermined by environmental pressures that reduce sucrose and total volatile content. The volatile profiles among commercial strawberry varieties are complex and distinct, but a list of perceptually impactful compounds from the larger mixture is better defined. Particular esters, terpenes, and furans have the most significant fits to strawberry flavor intensity. In total, thirty-one volatile compounds are found to be significantly correlated to strawberry flavor intensity, only one of them negatively. Further analysis identifies individual volatile compounds that have an enhancing effect on perceived sweetness intensity of fruit independent of sugar content. These findings allow for consumer influence in the breeding of more desirable fruits and vegetables. Also, this approach garners insights into fruit metabolomics, flavor chemistry, and a paradigm for enhancing liking of natural or processed products.

  13. ORANGE JUICE AND BLOOD PRESSURE

    Directory of Open Access Journals (Sweden)

    M. F. VALIM

    2009-01-01

    Full Text Available

    Blood pressure is the force of blood against artery walls. It is measured in millimeters of mercury (mm Hg and recorded as two numbers: systolic pressure (as the heart contracts over diastolic pressure (as the heart relaxes between beats. High blood pressure (hypertension is defined as chronically elevated high blood pressure, with systolic blood pressure (SBP of 140 mm Hg or greater, and diastolic blood pressure (DBP of 90 mm Hg or greater. High blood pressure (HBP, smoking, abnormal blood lipid levels, obesity and diabetes are risk factors for coronary heart disease, the leading cause of death in the US. Lifestyle modifications such as engaging in regular physical activity, quitting smoking and eating a healthy diet (limiting intake of saturated fat and sodium and increasing consumption of fiber, fruits and vegetables are advocated for the prevention, treatment, and control of HBP. As multiple factors influence blood pressure, the effects of each factor are typically modest, particularly in normotensive subjects, yet the combined effects can be substantial. Nutrition plays an important role in influencing blood pressure. Orange juice should be included as part of any low sodium diet and/or any blood pressure reducing eating plan, as it is sodium free, fat-free and can help meet recommended levels of potassium intake that may contribute to lower BP.

  14. Effect of Chitosan Coating Treatments and Calcium Dips on Quality and Shelf-life of Strawberries

    International Nuclear Information System (INIS)

    Swailam, H.M.

    2008-01-01

    Strawberries are a highly perishable fruit and storage life may be less than a week. In these investigations strawberries were treated with one of the following treatments: I) 1 % calcium chloride dips (1 % CaCl 2 ), II) 2 % irradiated (150 kGy in the solid state) chitosan (CS) (2 % Irr. CS) and III) with a coating formulation containing 2 % Irr. CS + 1 % CaCl 2 . They were then stored at 6 degree C for up to 24 days. The effectiveness of the different treatments was assessed by evaluating the microbiological, physicochemical and sensory properties of strawberries during the storage period. Results indicated that no sign of strawberries decay were observed in the fruits treated with CS formulation containing 2 % Irr. CS + 1 % CaCl 2 up to 20 days, where 6.1 % wt loss was detected. This treatment slowed the ripening of strawberries as shown by their retention of firmness and delayed changes in their external colour anthocyanin. To a lesser extent titratable acidity and ph were also affected by coatings. This treatment decreased the initial log counts of total aerobic bacteria, mould and yeast, coliform and E. coli. After 20 days of cold storage, the log counts of these micro organisms were lower than the log count of uncoated strawberries. Thus, CS can be used as a natural antimicrobial coating on fresh strawberries to improve microbiological quality and extend shelf-life. CS formulation contains 2 % Irr. CS + 1 % CaCl 2 extended the shelf-life of strawberries to 20 days in cold storage at 6 degree C with acceptable appearance, firmness, flavour and colour, while uncoated strawberries only lasted for 4 days as a result of mould growth and loss of surface appearance

  15. 75 FR 78674 - Emergency Food Assistance Program; Availability of Foods for Fiscal Year 2011

    Science.gov (United States)

    2010-12-16

    ...-apple juice, apple juice, cranberry sauce, dried cranberries, dried cherries, strawberries, applesauce, wild blueberries, mixed fruit, strawberry cups, peaches, pears, plums, dates, fig pieces, chicken leg...

  16. Carotenoid composition of strawberry tree (Arbutus unedo L.) fruits.

    Science.gov (United States)

    Delgado-Pelayo, Raúl; Gallardo-Guerrero, Lourdes; Hornero-Méndez, Dámaso

    2016-05-15

    The carotenoid composition of strawberry tree (Arbutus unedo) fruits has been characterised in detail and quantified for the first time. According to the total carotenoid content (over 340 μg/g dw), mature strawberry tree berries can be classified as fruits with very high carotenoid content (>20 μg/g dw). (all-E)-Violaxanthin and 9Z-violaxanthin were found to be the major carotenoid pigments, accounting for more than 60%, responsible for the bright colour of the flesh of ripe fruits. In addition other 5,6-epoxide carotenoids, such as (all-E)-neoxanthin, (9'Z)-neoxanthin (all-E)-antheraxanthin and lutein 5,6-epoxide, together with (all-E)-lutein, (all-E)-zeaxanthin and (all-E)-β-carotene were found at high levels (>5-20 μg/g dw). The LC-MS (APCI+) analysis of the xanthophyll fraction in their native state (direct extract) revealed that most of them (>90%) were totally esterified with saturated fatty acids (capric, lauric, myristic, palmitic and stearic). Monoesters, homodiesters and heterodiesters of (all-E)-violaxanthin and 9Z-violaxanthin were the major pigments. Copyright © 2015 Elsevier Ltd. All rights reserved.

  17. The memory of iron stress in strawberry plants.

    Science.gov (United States)

    Gama, Florinda; Saavedra, Teresa; da Silva, José Paulo; Miguel, Maria Graça; de Varennes, Amarilis; Correia, Pedro José; Pestana, Maribela

    2016-07-01

    To provide information towards optimization of strategies to treat Fe deficiency, experiments were conducted to study the responses of Fe-deficient plants to the resupply of Fe. Strawberry (Fragaria × ananassa Duch.) was used as model plant. Bare-root transplants of strawberry (cv. 'Diamante') were grown for 42 days in Hoagland's nutrient solutions without Fe (Fe0) and containing 10 μM of Fe as Fe-EDDHA (control, Fe10). For plants under Fe0 the total chlorophyll concentration of young leaves decreased progressively on time, showing the typical symptoms of iron chlorosis. After 35 days the Fe concentration was 6% of that observed for plants growing under Fe10. Half of plants growing under Fe0 were then Fe-resupplied by adding 10 μM of Fe to the Fe0 nutrient solution (FeR). Full Chlorophyll recovery of young leaves took place within 12 days. Root ferric chelate-reductase activity (FCR) and succinic and citric acid concentrations increased in FeR plants. Fe partition revealed that FeR plants expressively accumulated this nutrient in the crown and flowers. This observation can be due to a passive deactivation mechanism of the FCR activity, associated with continuous synthesis of succinic and citric acids at root level, and consequent greater uptake of Fe. Copyright © 2016 Elsevier Masson SAS. All rights reserved.

  18. Chemical composition and antioxidant activity of two strawberry cultivars

    Directory of Open Access Journals (Sweden)

    Đilas Sonja M.

    2011-01-01

    Full Text Available The macro- and micro-chemical composition, as well as antioxidant activity of two strawberry cultivars, Marmolada and Clery, were studied. Results showed a noticeable difference in the sugar, protein and pectin contents. Clery had 6.92% and Marmolada 4.93% of total sugar. Also, protein and pectin contents were higher in the Clery cultivar. No significant difference was observed in acidity, as well as in ash and cellulose content. Marmolada had a higher content of total phenolics and flavonoids (228.04 mg GAE /100 g FW and 136.01 mg RE/100 g FW, respectively . The anthocyanins content in Marmolada (32.0 mg CGE/100 g FW was slightly lower than in Clery (36.0 mg CGE/100 g FW. The antioxidant activity was evaluated spectrophotometrically, using 2,2-diphenyl- 1-picrylhydrazyl (DPPH radical scavenging activity assay. The DPPH free radical scavenging activity, expressed as EC50 value, of Marmolada (0.77 mg/ml was higher than of Clery (0.83 mg/ml. There was a significant positive correlation (R2>0.90 between the concentration of phenolics/flavonoids/anthocyanins and DPPH radical scavenging activity of both strawberry cultivars. These results also showed that the antioxidant value of 100 g FW Marmolada and Clery is equivalent to 237.91 mg and 219.01 mg of vitamin C, respectively.

  19. Radiation processing of fruits: application to strawberries and prunes

    International Nuclear Information System (INIS)

    Levillain, M.

    1986-10-01

    Extending the shelf-life of fresh fruit by means of low-dose irradiation (radurization) is not a new idea: experiments in that field started in the early sixties. These experiments have actually proved that, in some cases, irradiation can achieve shelf-life extension, either through a delay in ripening (bananas), or through rot inhibition (soft cherries, apricots, tomatoes, strawberries). Alas, they have also highlighted the intolerance showed by a number of fruits when radurized: irradiation is apt to have them ripen more rapidly (peaches, nectarines) or to soften them too much (pears, table grapes, oranges, apples, plums, grapefruit, melons, honeydew melons). Even in those cases where irradiation results in a benefit, this benefit varies depending on the variety of fruit involved, as can be seen from a deep survey of the irradiation of strawberries. Preservation of dehydrated fruit is a different matter. Prunes, for instance, would be contamined by molds, wasn't it for the addition of sorbic acid during the fabrication process. Ionization of prunes can allow producers to avoid the use of a chemical, and to keep the prunes at a greater degree of humidity [fr

  20. Mycorrhizal inoculation affects the phytochemical content in strawberry fruits

    Directory of Open Access Journals (Sweden)

    Ana Paula Cecatto

    2016-04-01

    Full Text Available The aim of this research was to evaluate the effect of the inoculation date of arbuscular mycorrhizal fungi on the fruit quality and the content of phytochemicals in a strawberry soilless growing system. The experiment was performed in Huelva (Spain and was conducted in a greenhouse on the La Rábida Campus of Huelva University under natural light and temperature from October 2013 to June 2014. Three short-day strawberry cultivars (‘Splendor’, ‘Sabrina’ and ‘Fortuna’ were grown in polyethylene bags filled with coconut fibres. Randomized block design, with 3 repetitions and factorial arrangement (3 cultivars x 3 treatments, was established. Each replicate consisted of one bag with 12 plants supporting structures at 40 cm height. The treatments were: T1 = mycorrhizal inoculation in the transplantation; T2 = mycorrhizal inoculation 30 days after transplantation (DAT; and T0 = control treatment, without inoculation. Arbuscular mycorrhizal fungi inoculation significantly affected the contents of anthocyanin and phenolics. When the inoculation is performed in the transplantation, the fruits showed a high content of anthocyanin and total phenolics. The mycorrhizal inoculation influences decreasing the acidity in fruit throughout the growing season and increase firmness only during the early stage of production.

  1. Modelling formulae of strawberry whey drinks of prophylactic application

    Directory of Open Access Journals (Sweden)

    N. Tkachenko

    2017-04-01

    Full Text Available Expediency of the development of formulae and innovative technologies for production of prophylactic application drinks possessing antioxidant, probiotic and hepatoprotective properties with the use of the secondary dairy product – whey, as well as the domestic vegetable raw materials having a high content of bioactive substances has been substantiated.Formulation composition of the prophylactic drinks based on cheese whey, extract of Tagetes patula flowers and the berry filler “Strawberry” with the use of the response surface method has been developed. Bioactivity of the drinks and the complex quality indicator which accounts for the total influence of the bioactivity, organoleptic assessment and weight coefficients of the specified unit indicators were taken as the optimization criteria; as the independent factors that were varied in the course of the experiment, the mass fractions of the marigold flowers extract and the strawberries filler were selected. It is recommended that the mass fractions of the berry filler “Strawberry” and the extract of Tagetes patula flowers in the prophylactic drinks are set as 7 and 20 % of the finished product, accordingly. The practical mass fraction of the citric acid of 0.2 % was determined as it ensures high organoleptic characteristics of the finished drinks. Recommendations are given concerning development of innovative technologies of unfermented and fermented strawberry whey drinks of prophylactic application enriched with the extract of Tagetes patula flowers.

  2. Microbiological Quality of Fresh Nopal Juice

    Directory of Open Access Journals (Sweden)

    Ana María Hernández-Anguiano

    2016-12-01

    Full Text Available The consumption of fresh nopal cactus juice is widely popular among health-conscious consumers in Mexico. The juice is prepared from fresh cladodes that have only been rinsed with tap water and are not subjected to a pasteurization or terminal bacterial reduction process. The aim of this study was to evaluate the microbial quality of commercially available fresh juices (n = 162 made with nopal in Texcoco, State of Mexico, during the summer and spring season. Standard microbiological methods, the PCR technique and the serological method were used for isolation and identification of bacteria. All samples contained total coliforms and 91% were positive for Escherichia coli. Although total coliforms and E. coli were detected throughout the study, their populations were significantly lower (p < 0.05 in winter and spring, respectively. Citrobacter youngae was found in 20% of the samples, an unidentified species of Citrobacter in 10%, C. freundii and Proteus mirabilis in 3%, and Salmonella Javiana in 1%. The presence of these microorganisms, especially Salmonella, in the nopal juices is unacceptable due to its health significance. The information generated in this study is relevant for human health risk assessment associated with the consumption of unpasteurized nopal juices and potential interventions to minimize pathogen contamination.

  3. Jungle Juice: Knowledge and Usage Among Kenyan Surgical Teams

    African Journals Online (AJOL)

    This survey aimed to evaluate knowledge and safe usage of jungle juice on patients in ... patterns and safety measures employed during use of jungle juice among ... Regarding the specific antidote for severe local anesthetic toxicity and its ...

  4. Melatonin in Apples and Juice: Inhibition of Browning and Microorganism Growth in Apple Juice.

    Science.gov (United States)

    Zhang, Haixia; Liu, Xuan; Chen, Ting; Ji, Yazhen; Shi, Kun; Wang, Lin; Zheng, Xiaodong; Kong, Jin

    2018-02-27

    Synthetic melatonin ( N -acetyl-5-methoxytryptamine, MT) is popular in the US and Asian markets as a health supplement. Here, we identified a naturally occurring melatonin source in apple juice. Melatonin was present in all 18 apple cultivars tested. The highest melatonin level of the edible part of apple was detected in the apple peel. The melatonin content in 'Fuji' apple juice is comparable to the level of its flesh. Melatonin was consumed during the process of juicing due to its interaction with the oxidants. Melatonin addition significantly reduced the juice color change to brown (browning). The mechanism is that melatonin scavenges the free radicals, which was indicated by the ASBT analysis; therefore, inhibiting the conversion of o -diphenolic compounds into quinones. Most importantly, melatonin exhibited powerful anti-microorganism activity in juice. The exact mechanisms of this action are currently unknown. These effects of melatonin can preserve the quality and prolong the shelf life of apple juice. The results provide valuable information regarding commerciall apple juice processing and storage.

  5. Melatonin in Apples and Juice: Inhibition of Browning and Microorganism Growth in Apple Juice

    Directory of Open Access Journals (Sweden)

    Haixia Zhang

    2018-02-01

    Full Text Available Synthetic melatonin (N-acetyl-5-methoxytryptamine, MT is popular in the US and Asian markets as a health supplement. Here, we identified a naturally occurring melatonin source in apple juice. Melatonin was present in all 18 apple cultivars tested. The highest melatonin level of the edible part of apple was detected in the apple peel. The melatonin content in ‘Fuji’ apple juice is comparable to the level of its flesh. Melatonin was consumed during the process of juicing due to its interaction with the oxidants. Melatonin addition significantly reduced the juice color change to brown (browning. The mechanism is that melatonin scavenges the free radicals, which was indicated by the ASBT analysis; therefore, inhibiting the conversion of o-diphenolic compounds into quinones. Most importantly, melatonin exhibited powerful anti-microorganism activity in juice. The exact mechanisms of this action are currently unknown. These effects of melatonin can preserve the quality and prolong the shelf life of apple juice. The results provide valuable information regarding commerciall apple juice processing and storage.

  6. Flavor of fresh blueberry juice and the comparison to amount of sugars, acids, anthocyanidins, and physicochemical measurements.

    Science.gov (United States)

    Bett-Garber, Karen L; Lea, Jeanne M; Watson, Michael A; Grimm, Casey C; Lloyd, Steven W; Beaulieu, John C; Stein-Chisholm, Rebecca E; Andrzejewski, Brett P; Marshall, Donna A

    2015-04-01

    Six cultivars of southern highbush (SHB) and rabbiteye (RE) blueberry samples were harvested on 2 different dates. Each treatment combination was pressed 2 times for repeated measures. Fresh juice was characterized for 18 flavor/taste/feeling factor attributes by a descriptive flavor panel. Each sample was measured for sugars, acids, anthocyanidins, Folin-Ciocalteu, soluble solids (BRIX), titratable acidity (TA), and antioxidant capacity (ORACFL ). Flavors were correlated with the composition and physicochemical data. Blueberry flavor correlated with 3 parameters, and negatively correlated with 2. Strawberry correlated with oxalic acid and negatively correlated with sucrose and quinic acid. Sweet aroma correlated with oxalic and citric acid, but negatively correlated with sucrose, quinic, and total acids. Sweet taste correlated with 11 parameters, including the anthocyanidins; and negatively correlated with 3 parameters. Neither bitter nor astringent correlated with any of the antioxidant parameters, but both correlated with total acids. Sour correlated with total acids and TA, while negatively correlating with pH and BRIX:TA. Throat burn correlated with total acids and TA. Principal component analysis negatively related blueberry, sweet aroma, and sweet to sour, bitter, astringent, tongue tingle, and tongue numbness. The information in this component was related to pH, TA, and BRIX:TA ratio. Another principal component related the nonblueberry fruit flavors to BRIX. This PC, also divided the SHB berries from the RE. This work shows that the impact of juice composition on flavor is very complicated and that estimating flavor with physicochemical parameters is complicated by the composition of the juice. © 2015 Institute of Food Technologists®

  7. Utilization of dried roselle calyces extract in fruit juice processing

    OpenAIRE

    Kilima, Beatrice Mgaya

    2014-01-01

    There has been an increased consumption of fruit juice as consumers have become aware of the nutritional and health benefits of fruit juices. This increased consumption goes together with the growth of varieties of fruit juices and beverages offered for sale. Among these products is roselle (Hibiscus sabdariffa L.) juice, or drink, which is a good source of anthocyanins, vitamins (thiamine, riboflavin, niacin, ascorbic acid) and minerals (Ca, P, Fe). In addition, roselle is also used as flavo...

  8. 21 CFR 146.137 - Frozen orange juice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Frozen orange juice. 146.137 Section 146.137 Food... Beverages § 146.137 Frozen orange juice. (a) Frozen orange juice is orange juice as defined in § 146.135, except that it is frozen. (b) The name of the food is “Frozen orange juice”. Such name may be preceded on...

  9. Aroma Profile and Sensory Properties of Ultrasound-Treated Apple Juice and Nectar

    Directory of Open Access Journals (Sweden)

    Marinko Petrović

    2013-01-01

    Full Text Available Ultrasonication is a nonthermal food processing method that is used in several applications (extraction, treatment before drying, freezing, inactivation of microorganisms, etc. in ultrasound processing. The objective of this study is to investigate the effect of high power ultrasound and pasteurisation on the aroma profile and sensory properties of apple juice and nectar. Samples were treated according to the experimental design, with high power sonicator at ultrasound frequency of 20 kHz under various conditions (treatment time: 3, 6 and 9 min, sample temperature: 20, 40 and 60 °C, and amplitude: 60, 90 and 120 μm. The aromatic profiles of juices showed that, compared to the untreated samples of juices and nectars, ultrasonic treatment led to the formation of new compounds (which were not present in the untreated samples or to the disappearance of compounds that were found in the untreated samples. Samples treated at the highest amplitude (120 μm were used for evaluation and comparison with untreated and pasteurised samples using electronic tongue study. Principal component analysis confirmed the results of electronic tongue study, which showed that the ultrasound-treated and pasteurised juices had different scores compared to the untreated samples.

  10. Development of passion fruit juice beverage

    Science.gov (United States)

    Zhu, Xiang-hao; Duan, Zhen-hua; Yang, Yu-xia; Huang, Xin-hui; Xu, Cheng-ling; Huang, Zhi-zhuo

    2017-12-01

    In this experiment, the whole fruit of passion fruit was used as raw material. The effects of the ratio of material to liquid (RML), the amount of sucrose addition and the pH on the quality of passion fruit juice beverage were investigated by single factor test. And the optimum process conditions of passion fruit juice beverage were determined by orthogonal test. The results show that the optimum process paramenters were as follow: RML was 1:3, pH was 4.0 and sucrose addition was 8%. Under such optimal conditions, the color of passion fruit juice beverage was red, the flavor of passion fruit was rich and it tasted pleasant.

  11. Carbon isotope ratios and isotopic correlations between components in fruit juices

    Science.gov (United States)

    Wierzchnicki, Ryszard

    2013-04-01

    Nowadays food products are defined by geographical origin, method of production and by some regulations concerning terms of their authenticity. Important data for confirm the authenticity of product are providing by isotopic methods of food control. The method checks crucial criteria which characterize the authenticity of inspected product. The European Union Regulations clearly show the tendency for application of the isotopic methods for food authenticity control (wine, honey, juice). The aim of the legislation steps is the protection of European market from possibility of the commercial frauds. Method of isotope ratio mass spectrometry is very effective tool for the use distinguishably the food products of various geographical origin. The basic problem for identification of the sample origin is the lack of databases of isotopic composition of components and information about the correlations of the data. The subject of the work was study the isotopic correlations existing between components of fruits. The chemical and instrumental methods of separation: water, sugars, organic acids and pulp from fruit were implemented. IRMS technique was used to measure isotopic composition of samples. The final results for original samples of fruits (apple, strawberry etc.) will be presented and discussed. Acknowledgement: This work was supported by the Polish Ministry of Science and Higher Education under grant NR12-0043-10/2010.

  12. 21 CFR 146.187 - Canned prune juice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Canned prune juice. 146.187 Section 146.187 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR... Beverages § 146.187 Canned prune juice. (a) Canned prune juice is the food prepared from a water extract of...

  13. Stable-isotope composition of the water of apple juice

    International Nuclear Information System (INIS)

    Bricout, Jacques; Merlivat, Liliane

    1973-01-01

    By deuterium and oxygen 18 analysis, it was shown that apples' water is enriched in heavier isotopes as compared to rain water. The isotopic composition of the water of reconstituted apple juice is closed to the isotopic content of the rain water used for dilution. Thus, deuterium and oxyden 18 analysis allows a good analytical distinction between natural apple juice and reconstituted juices [fr

  14. Screening for anthracnose disease resistance in strawberry using a detached leaf assay

    Science.gov (United States)

    Inoculation of detached strawberry leaves with Colletotrichum species may provide a rapid, non-destructive method of identifying anthracnose resistant germplasm. The reliability and validity of assessing disease severity is critical to disease management decisions. We inoculated detached strawberr...

  15. Comprehensive proteomic analysis of human pancreatic juice

    DEFF Research Database (Denmark)

    Grønborg, Mads; Bunkenborg, Jakob; Kristiansen, Troels Zakarias

    2004-01-01

    Proteomic technologies provide an excellent means for analysis of body fluids for cataloging protein constituents and identifying biomarkers for early detection of cancers. The biomarkers currently available for pancreatic cancer, such as CA19-9, lack adequate sensitivity and specificity...... contributing to late diagnosis of this deadly disease. In this study, we carried out a comprehensive characterization of the "pancreatic juice proteome" in patients with pancreatic adenocarcinoma. Pancreatic juice was first fractionated by 1-dimensional gel electrophoresis and subsequently analyzed by liquid...... in this study could be directly assessed for their potential as biomarkers for pancreatic cancer by quantitative proteomics methods or immunoassays....

  16. Rheological properties of strawberry fruit coating with methylcellulose

    Directory of Open Access Journals (Sweden)

    Z Nadim

    2016-04-01

    Full Text Available Introduction: The maintenance of the quality of fresh products is still a major challenge for the consumers. The most important quality attributes contributing to the marketability of fresh fruit include appearance, color, texture, flavor, nutritional value and microbial safety. Strawberry fruits should be firm but not crunchy. Decreased quality during postharvest handling is most often associated with water loss and decay. The postharvest life of strawberries can be extended by coating technique combined with refrigeration. Application of edible coatings is a conventional method to increase shelf life and maintain fruit quality. Edible coatings can provide an alternative to enlarge fresh fruits’ postharvest life. In this study, the effects of application of methyl cellulose edible coatings and storage time on some mechanical properties, including: the yield stress, yield strain, energy of rupture and modulus of elasticity and also, the viscoelastic behavior of the strawberry fruit was investigated. Materials and Methods: MC (Methocel, Dow Chemical Company, Midland, MI coating was prepared by solubilizing MC powder (3.0 g per 100 mL in a water–ethyl alcohol mixture (2:1 at 75ºC under the high speedmixer (900 rpm for 15 min. Coatings were used directly on the fruit surface. The physical and mechanical characteristics of fruits were analyzed on 2, 5, 8 and 11 days of storage. The puncture test and relaxation test were done using a texture analyzer (Zwick/Roell Model BT1_FR0.5TH.D14, Zwick GmbH Co., Ulm, Germany; using Xforce HP model of loadcell with capacity of 500 N, by 2 mv/v characteristic. General Maxwell model is widely used to analyze experimental results of the stress tests applied for relaxation. The obtained model coefficients were determined and evaluated from relaxation stress curves. Residues were determined using the sequential model. Usually, multicomponent models can properly describe the actual behavior of agricultural

  17. An Examination of Electronic Cigarette Content on Social Media: Analysis of E-Cigarette Flavor Content on Reddit

    Directory of Open Access Journals (Sweden)

    Lei Wang

    2015-11-01

    Full Text Available In recent years, the emerging electronic cigarette (e-cigarette marketplace has shown great development prospects all over the world. Reddit, one of the most popular forums in the world, has a very large user group and thus great influence. This study aims to gain a systematic understanding of e-cigarette flavors based on data collected from Reddit. Flavor popularity, mixing, characteristics, trends, and brands are analyzed. Fruit flavors were mentioned the most (n = 15,720 among all the posts and were among the most popular flavors (n = 2902 used in mixed blends. Strawberry and vanilla flavors were the most popular for e-juice mixing. The number of posts discussing e-cigarette flavors has increased sharply since 2014. Mt. Baker Vapor and Hangen were the most popular brands discussed among users. Information posted on Reddit about e-cigarette flavors reflected consumers’ interest in a variety of flavors. Our findings suggest that Reddit could be used for data mining and analysis of e-cigarette-related content. Understanding how e-cigarette consumers’ view and utilize flavors within their vaping experience and how producers and marketers use social media to promote flavors and sell products could provide valuable information for regulatory decision-makers.

  18. Preparation and Application of LDPE/ZnO Nanocomposites for Extending Shelf Life of Fresh Strawberries

    OpenAIRE

    Emamifar, Aryou; Mohammadizadeh, Mehri

    2015-01-01

    Strawberries have a very short post-harvest life mostly due to their relatively high water content, intense metabolic activity and susceptibility to microbial rot. Antimicrobial low-density polyethylene nanocomposite films containing ZnO nanoparticles at different mass fractions were prepared by melt mixing and followed by compression moulding using a hot press machine. Fresh strawberries were packed in nanocomposite films and stored at 4 °C. Their microbial stability, ascorbic acid content a...

  19. The Use of Arbuscular Mycorrhizal Fungi to Improve Strawberry Production in Coir Substrate

    Directory of Open Access Journals (Sweden)

    Louisa Robinson Boyer

    2016-08-01

    Full Text Available Strawberry is an important fruit crop within the UK. To reduce the impact of soil-borne diseases and extend the production season, more than half of the UK strawberry production is now in substrate (predominantly coir under protection. Substrates such as coir are usually depleted of microbes including arbuscular mycorrhizal fungi (AMF and consequently the introduction of beneficial microbes is likely to benefit commercial cropping systems. Inoculating strawberry plants in substrate other than coir has been shown to increase plants tolerance to soil-borne pathogens and water stress. We carried out studies to investigate whether AMF could improve strawberry production in coir under low nitrogen input and regulated deficit irrigation. Application of AMF led to an appreciable increase in the size and number of class I fruit, especially under either deficient irrigation or low nitrogen input condition. However, root length colonisation by AMF was reduced in strawberry grown in coir compared to soil and Terragreen. Furthermore, the appearance of AMF colonising strawberry and maize roots grown in coir showed some physical differences from the structure in colonised roots in soil and Terragreen: the colonization structure appeared to be more compact and smaller in coir.

  20. Successful strategy for the selection of new strawberry-associated rhizobacteria antagonistic to Verticillium wilt.

    Science.gov (United States)

    Berg, G; Kurze, S; Buchner, A; Wellington, E M; Smalla, K

    2000-12-01

    In order to isolate and characterize new strawberry-associated bacteria antagonistic to the soil-borne pathogenic fungus Verticillium dahliae Kleb., rhizobacterial populations from two different strawberry species, Greenish Strawberry (Fragaria viridis) and Garden Strawberry (F. x ananassa) obtained after plating onto King's B and glycerol-arginine agar, were screened for in vitro antagonism toward V. dahliae. The proportion of isolates with antifungal activity determined in in vitro assay against V. dahliae was higher for the Garden Strawberry than for the Greenish Strawberry. From 300 isolates, 20 isolates with strong antifungal activity were selected characterized by physiological profiling and molecular fingerprinting methods. Diversity among the isolates was characterized with molecular fingerprints using amplified ribosomal DNA restriction analysis (ARDRA) and the more discriminating BOX-PCR fingerprint method. The physiological profiles were well correlated with molecular fingerprinting pattern analysis. Significant reduction of Verticillium wilt by bacterial dipping bath treatment was shown in the greenhouse and in fields naturally infested by V. dahliae. The relative increase of yield ranged from 117% (Streptomyces albidoflavus S1) to 344% (Pseudomonas fluorescens P10) in greenhouse trials, and 113% (Streptomyces albidoflavus S1) to 247% (Pseudomonas fluorescens P6) in field trials. Evaluation resulted in the selection of three effective biocontrol agents (Pseudomonas fluorescens P6, P10, and Streptomyces diastatochromogenes S9) antagonistic to the Verticillium wilt pathogen.

  1. Effect of Storage on the Physico-Chemical and Antioxidant Properties of Strawberry and Kiwi Leathers.

    Science.gov (United States)

    Concha-Meyer, Anibal A; D'Ignoti, Valeria; Saez, Barbara; Diaz, Ricardo I; Torres, Carolina A

    2016-03-01

    Strawberry and kiwi leathers were used to develop a new healthy and preservative-free fruit snack for new markets. Fruit puree was dehydrated at 60 °C for 20 h and subjected to accelerated storage. Soluble solids, titratable acidity, pH, water activity (aw ), total phenolic (TP), antioxidant activity (AOA) and capacity (ORAC), and color change (browning index) were measured in leathers, cooked, and fresh purees. An untrained panel was used to evaluate consumer acceptability. Soluble solids of fresh purees were 11.24 to 13.04 °Brix, whereas pH was 3.46 to 3.39. Leathers presented an aw of 0.59 to 0.67, and a moisture content of 21 kg water/100 kg. BI decreased in both leathers over accelerated storage period. TP and AOA were higher (P ≤ 0.05) in strawberry formulations. ORAC decreased 57% in strawberry and 65% in kiwi leathers when compared to fruit puree. TP and AOA increased in strawberries during storage. Strawberry and Kiwi leathers may be a feasible new, natural, high antioxidant, and healthy snack for the Chilean and other world markets, such as Europe, particularly the strawberry leather, which was preferred by untrained panelists. © 2016 Institute of Food Technologists®

  2. Fate and activity of fungal BCAs delivered to strawberry flowers and their potential for integration with fungicides

    DEFF Research Database (Denmark)

    Jensen, Birgit; Andersen, Birgitte; Thrane, Ulf

    2013-01-01

    Grey mold caused by Botrytis cinerea is a serious strawberry disease. Yield loss is prevented by repeated fungicide treatments during flowering which increases the risk of pesticide residues in berries. Fruit lesions are typically initiated from B. cinerea infected stamens or from dead infected......) the interaction between BCAs and B. cinerea on strawberry flowers, 2) the sensitivity of BCAs to strawberry fungicides, and 3) the effect of combined BCA+fungicide treatment on BCAs and on the indigenous mycobiota....

  3. In vitro demineralization of enamel by orange juice, apple juice, Pepsi Cola and Diet Pepsi Cola.

    Science.gov (United States)

    Grobler, S R; Senekal, P J; Laubscher, J A

    1990-12-01

    Enamel demineralization was studied over periods related to normal use of an orange juice, an apple juice, Pepsi Cola and Diet Pepsi Cola. Rectangular blocks of intact human enamel (3 mm x 3 mm) were cut from teeth, coated with nail varnish except for the enamel surface and exposed to the drinks for 2, 4, 5, 6 or 40 minutes. The amount of calcium released from the enamel into solution was determined with the use of an atomic absorption spectrophotometer. The results showed the following degree of enamel demineralization: Pepsi Cola = orange juice greater than apple juice greater than Diet Pepsi Cola. The results suggest that diet colas are less demineralizing than other acid drinks, and complementary plaque studies indicate that they are also less cariogenic. The study emphasized the importance of acid-type, buffer capacity, pH and the presence of other components on the degree of enamel demineralization.

  4. Effects of Juice Processing on Oxalate Contents in Carambola Juice Products.

    Science.gov (United States)

    Huynh, Nha K; Nguyen, Ha V H

    2017-09-01

    Effects of processing methods including pressing, enzyme-assisted extraction, lactic acid fermentation by Lactobacillus acidophilus, and alcohol fermentation by Saccharomyces cerevisiae on total and soluble oxalate contents of carambola juices were studied. In comparison with pressing, the use of enzyme increased juice yields (15.89-17.29%), but resulted in higher total oxalate (1.60-1.73 times) and soluble oxalate contents (1.16-1.49 times). In addition, extension of enzyme incubation periods led to an increase in soluble oxalate contents in the products (p carambola juices. These results suggested that carambola juice products should only be consumed moderately, and that alcohol fermentation could be a potential method to reduce oxalate contents in foods in order to prevent the risks of forming kidney stones.

  5. Opalescent and cloudy fruit juices: formation and particle stability.

    Science.gov (United States)

    Beveridge, Tom

    2002-07-01

    Cloudy fruit juices, particularly from tropical fruit, are becoming a fast-growing part of the fruit juice sector. The classification of cloud as coarse and fine clouds by centrifugation and composition of cloud from apple, pineapple, orange, guava, and lemon juice are described. Fine particulate is shown to be the true stable cloud and to contain considerable protein, carbohydrate, and lipid components. Often, tannin is present as well. The fine cloud probably arises from cell membranes and appears not to be simply cell debris. Factors relating to the stability of fruit juice cloud, including particle sizes, size distribution, and density, are described and discussed. Factors promoting stable cloud in juice are presented.

  6. The Chemical and Educational Appeal of the Orange Juice Clock

    Science.gov (United States)

    Kelter, Paul B.; Carr, James D.; Johnson, Tanya; Mauricio Castro-Acuña, Carlos

    1996-12-01

    The Orange Juice Clock, in which a galvanic cell is made from the combination of a magnesium strip, a copper strip, and juice in a beaker, has been a popular classroom, conference, and workshop demonstration for nearly 10 years. It is widely enjoyed because it shows visually how chemistry - or more precisely, electrochemistry - is responsible for the very common phenomenon of a clock ticking. The chemistry of the process can also be understood on a variety of levels, from middle school (simple electron flow in a circuit, Ohm's law) and high school (reduction/oxidation and standard cell potentials) to first-year college (cell potential at nonideal conditions) and graduate school courses (overpotential and charge transfer across interfaces.) The discussion that follows considers the recent history, chemistry, and educational uses of the demonstration. The History The demonstration was devised by one of us (PK) in 1986, after reading an activity in Hubert Alyea's 1947 compendium of chemical demonstrations from this Journal (1). In that activity, Alyea hooked a magnesium strip to the negative battery terminal of an electric bell and hooked a copper strip to the positive terminal. He placed the loose ends of the strips into a 1M 2SO4 solution and the bell rang. After trying the demonstration, it seemed to make sense to modify the electrolyte to orange juice because it is safe, readily available, and would be a mixture in which the magnesium would oxidize more slowly than in sulfuric acid. Further, a clock was substituted for the bell because a clock is easier on the ears than a bell. A video of the orange-juice clock setup is given as Figure 1. Figure 1.The orange juice clock set up. Video of orange juice clock was filmed and editted by Jerry Jacobson at the University of Wisconsin - Madison. The apparatus was presented in 1987 as part of a teacher workshop led by Irwin Talesnick, then of Queen's University in Canada. Talesnick, whose distinguished career has been

  7. An anthocyanin rich strawberry extract induces apoptosis and ROS while decreases glycolysis and fibrosis in human uterine leiomyoma cells.

    Science.gov (United States)

    Islam, Md Soriful; Giampieri, Francesca; Janjusevic, Milijana; Gasparrini, Massimiliano; Forbes-Hernandez, Tamara Y; Mazzoni, Luca; Greco, Stefania; Giannubilo, Stefano Raffaele; Ciavattini, Andrea; Mezzetti, Bruno; Capocasa, Franco; Castellucci, Mario; Battino, Maurizio; Ciarmela, Pasquapina

    2017-04-04

    Uterine leiomyomas are highly prevalent benign tumors in reproductive aged women. Unfortunately, medical treatments are still limited and no preventive therapies have been developed. In the present study, we investigated the therapeutic effects of strawberry extract on uterine leiomyoma cells. Leiomyoma and myometrial cells were treated with strawberry (cultivar Alba) extract (250 μg/ml) for 48 h to measure apoptosis, reactive oxygen species (ROS), oxidative phosphorylation (OCR, oxygen consumption rate) and glycolysis (ECAR, extracellular acidification rate) as well as fibrosis associated gene and/or protein expression. In leiomyoma cells, strawberry increased the percentage of apoptotic and dead cells. Strawberry significantly increased ROS concentration in leiomyoma cells, while decreased it in myometrial cells. After strawberry treatment, leiomyoma cells showed a significant decreased rate of ECAR, while OCR was unchanged in both myometrial and leiomyoma cells. Strawberry significantly decreased collagen1A1, fibronectin and versican mRNA expression in leiomyoma cells. The reduced protein expression of fibronectin was observed by strawberry extract in leiomyoma cells as well. Furthermore, strawberry was able to reduce activin A induced fibronectin, collagen1A1, and versican as well as activin A and PAI-1 mRNA expression in leiomyoma cells. This study suggests that strawberry can be developed as therapeutic and/or preventive agent for uterine leiomyomas.

  8. Antioxidant activity of polyphenol-enriched apple juice

    Directory of Open Access Journals (Sweden)

    Šumić Zdravko M.

    2009-01-01

    Full Text Available This paper shows that it is possible to improve antioxidant activity of apple juice by extraction of polyphenolic compounds from apple pomace, as waste, and their addition to the apple juice. Raw apple juice was prepared by pressing of apple mash. After thermal treatment of raw apple juice, depectinisation, additional clarification and filtration, the clarified juice was obtained. In raw and clarified apple juice soluble solids, acidity, reducing sugar, total sugars and brown component content were determined, as well as total dry matter, ash, acidity, reducing sugar, total sugars, total pectins, cellulose and starch content in apple mash and pomace. The total cotent of phenolics in clarified apple juice and apple pomace extract, determined spectrophotometrically using the Folin- Ciocalteu reagent, was 0.496 mg/ml and 6.505 mg/g, respectively. The antioxidant activity of clarified and polyphenol-enriched clarified juice (with addition of apple pomace extract in the concentrations 0.05 g, 0.1 g, 0.5 g and 1 g of phenolic compounds per liter of clarified apple juice was examined on stable 1,1-diphenyl-2-picrylhydrazyl (DPPH free radicals. Based on the obtained results it can be concluded that polyphenol-enriched clarified juice was more effective on DPPH radicals than the clarified apple juice.

  9. Quality of jinchen orange juice treated with irradiation and pasteurization

    International Nuclear Information System (INIS)

    Qiao Yu; Cheng Wei; Wang Shaohua; Xiong Guangquan; Liao Li; Chen Xueling; Fan Gang; Pan Siyi

    2010-01-01

    Jinchen orange juice was treated by pasteurization and irradiation (1.4, 2.8 and 5.6 kGy) to study the effects of sterilization methods on quality of orange juice. The volatile compounds were analyzed by solid phase micro-extraction method combined with GC-MS. The juice color, pH and Vc content were determined, and sensory evaluation of the juice were evaluated. The results showed a total of 54, 47, 57, 55, 53 kinds of compounds were detected in fresh juice, pasteurized juice and 3 irradiated juices, respectively. The irradiated juices had bigger peak area of volatile compounds than pasteurized juice,and the biggest peak area was found in 2.8 kGy irradiation sample. β - myrcene, D - limonene and γ-terpinene, which were the characteristic aroma compounds in orange juice, were detected a higher level in irradiation sample than pasteurization. Vc content and aroma decreased after all treatments. The sample after 1.4 kGy treatment showed highest score in sensory evaluation. It was concluded that low dose irradiation could be used in sterilization processing of orange juice. (authors)

  10. Detection of irradiation of strawberries by determining their microbial characteristics

    International Nuclear Information System (INIS)

    Tamminga, S.K.; Beumer, R.R.; Kampelmacher, E.H.

    1978-01-01

    A system was elaborated to determine whether strawberries have been irradiated, using 3 criteria, namely the number of Enterobacteriaceae, the percentage of yeasts on total microflora (or total absence of microorganisms) and the number of Pseudomonas. The higher the numbers of Enterobacteriaceae and/or Pseudomonas, the lower the probability that the strawberries have been irradiated. The higher the yeast percentage, the more the conclusion is justified that irradiation has taken place. The same holds true for total absence of microorganisms. By combining results for the 3 criteria an identification scheme was drawn up that would have led to 189 correct decisions (92.2%) on 205 samples (102 irradiated with 200krad, 103 unirradiated). In only 3 samples (1.5%) the combination of properties resembled that generally shown by the opposite group in such a way that they would have been classified in the wrong category. Some combinations of results for the 3 criteria were found in about equal numbers for both irradiated and unirradiated samples. These samples and others showing contradictory results, totalling 13 samples (6.3%), had to be placed in a separate 'intermediate' category, about which no opinion could be given. The only possibility in such cases is to investigate new samples. Sixty of the samples were investigated without the investigators knowing whether the samples had been irradiated; 56 of them would have been classified in the right category with the help of the scheme made up using the previous data; the remaining 4 had to be classified in the intermediate category. (author)

  11. Radiation induced chemical changes of phenolic compounds in strawberries

    International Nuclear Information System (INIS)

    Breitfellner, F.; Solar, S.; Sontag, G.

    2002-01-01

    Complete text of publication follows. The investigations were directed to the determination of the effect of γ-irradiation on various phenolic compounds in strawberries in dependence of dose. A significant decrease of these compounds during irradiation could reduce their beneficial effect on health, which are based on their antioxidative and anticarcinogenic properties. On the other hand hydroxilation of phenolic acids has been proposed as a promising method to distinguish between irradiated and not irradiated fruits and vegetables. Irradiated and not irradiated strawberry samples were homogenized, centrifuged and chromatographically purified from matrix components on polyamide columns. For determination of hydroxybenzoic and hydroxycinnamic acids, which are present as esters or as glycosides, the samples had to be acid/base hydrolized prior to purification. The individual compounds were separated by reversed phase chromatography and detected by means of a diode-array-detector. Peak identification was based on both UV-Vis-spectra and retention times compared with those of standards. In hydrolized samples four phenolic acids [gallic acid, 4-hydroxybenzoic acid, p-coumaric acid and caffeic acid] were identified. Only 4-hydroxybenzoic acid was affected by irradiation (build up with dose). Five flavonoids were detected in non hydrolized samples [(+)-catechin, (-)-epicatechin, kaempferol-3-glucoside, quercetin-3-glucoside and, in trace quantities, quercetin-3-galactoside], the concentration of the catechines and of kaempferol-3-glucoside decreased as irradiation dose increased, whereas those of quercetin-3-glucoside remained unchanged. In addition two as yet unclassified compounds showed a significant change of concentration upon irradiation. One of them (m/e = 450) is decreasing, one (m/e = 318) is increasing to the fivefold at a dose of 6 kGy

  12. 21 CFR 156.145 - Tomato juice.

    Science.gov (United States)

    2010-04-01

    ...). The food is preserved by heat sterilization (canning), refrigeration, or freezing. When sealed in a... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Tomato juice. 156.145 Section 156.145 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN...

  13. 21 CFR 146.132 - Grapefruit juice.

    Science.gov (United States)

    2010-04-01

    ... in the finished food. The grapefruit pulp, grapefruit oil, and grapefuit essence (components derived... paragraph (a)(2) of this section. Grapefruit juice, as defined in this paragraph, may be preserved by heat... sirup, dextrose, glucose sirup, and fructose. Sweeteners defined in part 168 of this chapter shall be as...

  14. Natural pomegranate juice reduces inflammation, muscle damage ...

    African Journals Online (AJOL)

    Ammar Achraf

    Therefore, the purpose of the present study is to investigate the effect of natural pomegranate juice (POMj) rich in ... POMj rich in polyphe- nols seems to have a power anti-inflammatory effect and to be an effective treatment for patients who ... cellular transcription factors such as the nuclear factor NF-kB. (NF-kB), tumor ...

  15. Fruit Juice in Infants, Children, and Adolescents: Current Recommendations.

    Science.gov (United States)

    Heyman, Melvin B; Abrams, Steven A

    2017-06-01

    Historically, fruit juice was recommended by pediatricians as a source of vitamin C and as an extra source of water for healthy infants and young children as their diets expanded to include solid foods with higher renal solute load. It was also sometimes recommended for children with constipation. Fruit juice is marketed as a healthy, natural source of vitamins and, in some instances, calcium. Because juice tastes good, children readily accept it. Although juice consumption has some benefits, it also has potential detrimental effects. High sugar content in juice contributes to increased calorie consumption and the risk of dental caries. In addition, the lack of protein and fiber in juice can predispose to inappropriate weight gain (too much or too little). Pediatricians need to be knowledgeable about juice to inform parents and patients on its appropriate uses. Copyright © 2017 by the American Academy of Pediatrics.

  16. The effects of strawberry cropping practices on the strawberry tortricid (Lepidoptera: Tortricidae), its naturel enemies, and the presences of nematodes

    DEFF Research Database (Denmark)

    Sigsgaard, Lene; Naulin, Cyril; Haukeland, Solveig

    2014-01-01

    of organic and conventional farms to test the hypothesis that farming practice (organic versus conventional) will affect the level of pest infestation and will affect the natural enemies. In addition, the number of years with strawberries on the farm, field age, and other factors that may affect pests...... and their natural enemies were considered. Farms were characterized by their cropping practices, cropping history, and other parameters. Field-collected larvae were laboratory reared to assess mortality from parasitoids and entomopathogenic fungi. In 2010, a survey of nematodes was made to assess the response......-year fields in 2010. Cropping practice did not lead to significant differences in the level of total parasitism or in C. aretas parasitism; however, C. aretas contributed to a higher proportion of the parasitized larvae on conventional farms than on organic farms. Mortality from unknown causes of A. comariana...

  17. Sucrose and color profiles in sugarcane (Saccharum sp.) juice analyzed by UFLC-ELSD and Synapt High-Definition Mass Spectrometry during radiation treatment

    International Nuclear Information System (INIS)

    Lima, Roberta B.; Lima de Aguiar, Claudio; Galaverna, Renan; Baptista, Antonio S.; Eberlin, Marcos N.; Arthur, Valter

    2016-01-01

    This work evaluated the effect of electron beam irradiation (E-beam) on sugarcane juice and compared the results with preliminary tests performed on sugarcane juice treated with gamma irradiation. The samples were irradiated at 5, 10 and 20 kGy doses and results were compared wile control samples without irradiation. The results showed a significant increase (p≤0.05) of phenolic compounds in both treatments. We also observed increased contents of reducing sugars (glucose and fructose) for the samples irradiated with gamma rays and E-beam measured by the DNS methods. However, there was no significant difference of sugars content measured by chromatographic analyses performed in the sugarcane juice treated with E-beam. Therefore reducing sugars content could be overestimated by the DNS method because salts in sugarcane juice. The treatments were able to reduce sugarcane juice ICUMSA color intensity in both treatments with irradiation. E-beam reduced sugarcane juice color by roughly 49% compared the control, while gamma irradiation reduced it by 30%. - Highlights: • E-beam and γ-radiation were evaluated on color reduction of sugarcane juice. • Any severe degradation of sucrose content was perceived by E-beam or γ-radiation. • Little degradation of sucrose was associated to the increase on radiation doses. • Average color reduction was found to be 49% with E-beam and 30% with γ-radiation. • Synapt HDMS was able to confirm the presence of sucrose, glucose and fructose.

  18. Characterization of soil chemical properties of strawberry fields using principal component analysis

    Directory of Open Access Journals (Sweden)

    Gláucia Oliveira Islabão

    2013-02-01

    Full Text Available One of the largest strawberry-producing municipalities of Rio Grande do Sul (RS is Turuçu, in the South of the State. The strawberry production system adopted by farmers is similar to that used in other regions in Brazil and in the world. The main difference is related to the soil management, which can change the soil chemical properties during the strawberry cycle. This study had the objective of assessing the spatial and temporal distribution of soil fertility parameters using principal component analysis (PCA. Soil sampling was based on topography, dividing the field in three thirds: upper, middle and lower. From each of these thirds, five soil samples were randomly collected in the 0-0.20 m layer, to form a composite sample for each third. Four samples were taken during the strawberry cycle and the following properties were determined: soil organic matter (OM, soil total nitrogen (N, available phosphorus (P and potassium (K, exchangeable calcium (Ca and magnesium (Mg, soil pH (pH, cation exchange capacity (CEC at pH 7.0, soil base (V% and soil aluminum saturation(m%. No spatial variation was observed for any of the studied soil fertility parameters in the strawberry fields and temporal variation was only detected for available K. Phosphorus and K contents were always high or very high from the beginning of the strawberry cycle, while pH values ranged from very low to very high. Principal component analysis allowed the clustering of all strawberry fields based on variables related to soil acidity and organic matter content.

  19. Partial activation of SA- and JA-defensive pathways in strawberry upon Colletotrichum acutatum interaction

    Directory of Open Access Journals (Sweden)

    FRANCISCO AMIL-RUIZ

    2016-07-01

    Full Text Available Understanding the nature of pathogen host interaction may help improve strawberry (Fragaria × ananassa cultivars. Plant resistance to pathogenic agents usually operates through a complex network of defense mechanisms mediated by a diverse array of signaling molecules. In strawberry, resistance to a variety of pathogens has been reported to be mostly polygenic and quantitatively inherited, making it difficult to associate molecular markers with disease resistance genes. Colletotrichum acutatum spp. is a major strawberry pathogen, and completely resistant cultivars have not been reported. Moreover, strawberry defense network components and mechanisms remain largely unknown and poorly understood. Assessment of the strawberry response to C. acutatum included a global transcript analysis, and acidic hormones SA and JA measurements were analyzed after challenge with the pathogen. Induction of transcripts corresponding to the SA and JA signaling pathways and key genes controlling major steps within these defense pathways was detected. Accordingly, SA and JA accumulated in strawberry after infection. Contrastingly, induction of several important SA, JA, and oxidative stress-responsive defense genes, including FaPR1-1, FaLOX2, FaJAR1, FaPDF1, and FaGST1, was not detected, which suggests that specific branches in these defense pathways (those leading to FaPR1-2, FaPR2-1, FaPR2-2, FaAOS, FaPR5 and FaPR10 were activated. Our results reveal that specific aspects in SA and JA dependent signaling pathways are activated in strawberry upon interaction with C. acutatum. Certain described defense-associated transcripts related to these two known signaling pathways do not increase in abundance following infection. This finding suggests new insight into a specific putative molecular strategy for defense against this pathogen.

  20. Quantitative Analysis of Fragrance and Odorants Released from Fresh and Decaying Strawberries

    Directory of Open Access Journals (Sweden)

    David Parker

    2013-06-01

    Full Text Available The classes and concentrations of volatile organic compounds (VOC released from fresh and decaying strawberries were investigated and compared. In this study, a total of 147 strawberry volatiles were quantified before and after nine days of storage to explore differences in the aroma profile between fresh strawberries (storage days (SRD of 0, 1, and 3 and those that had started to decay (SRD = 6 and 9. In terms of concentration, seven compounds dominated the aroma profile of fresh strawberries (relative composition (RC up to 97.4% by mass, sum concentration: (1 ethyl acetate = 518 mg∙m−3, (2 methyl acetate = 239 mg∙m−3, (3 ethyl butyrate = 13.5 mg∙m−3, (4 methyl butyrate = 11.1 mg∙m−3, (5 acetaldehyde = 24.9 mg∙m−3, (6 acetic acid = 15.2 mg∙m−3, and (7 acetone = 13.9 mg∙m−3. In contrast, two alcohols dominated the aroma profile of decayed samples (RC up to 98.6%: (1 ethyl alcohol = 94.2 mg∙m−3 and (2 isobutyl alcohol = 289 mg∙m−3. Alternatively; if the aroma profiles are re-evaluated by summing odor activity values (ΣOAV; four ester compounds ((1 ethyl butyrate (6,160; (2 ethyl hexanoate (3,608; (3 ethyl isovalerate (1,592; and (4 ethyl 2-methylbutyrate (942 were identified as the key constituents of fresh strawberry aroma (SRD-0. As the strawberries began to decay; isobutyl alcohol recorded the maximum OAV of 114 (relative proportion (RP (SRD = 6 = 58.3%. However, as the decay process continued, the total OAV dropped further by 3 to 4 orders of magnitude—decreasing to 196 on SRD = 6 to 7.37 on SRD = 9. The overall results of this study confirm dramatic changes in the aroma profile of strawberries over time, especially with the onset of decay.

  1. Habitual intake of fruit juice predicts central blood pressure.

    Science.gov (United States)

    Pase, Matthew P; Grima, Natalie; Cockerell, Robyn; Pipingas, Andrew

    2015-01-01

    Despite a common perception that fruit juice is healthy, fruit juice contains high amounts of naturally occurring sugar without the fibre content of the whole fruit. Frequent fruit juice consumption may therefore contribute to excessive sugar consumption typical of the Western society. Although excess sugar intake is associated with high blood pressure (BP), the association between habitual fruit juice consumption and BP is unclear. The present study investigated the association of fruit juice consumption with brachial and central (aortic) BP in 160 community dwelling adults. Habitual fruit juice consumption was measured using a 12 month dietary recall questionnaire. On the same day, brachial BP was measured and central (aortic) BP was estimated through radial artery applanation. Frequency of fruit juice consumption was classified as rare, occasional or daily. Those who consumed fruit juice daily, versus rarely or occasionally, had significantly higher central systolic BP (F (2, 134) = 6.09, p juice daily rather than rarely or occasionally. In conclusion, more frequent fruit juice consumption was associated with higher central BPs. Copyright © 2014 Elsevier Ltd. All rights reserved.

  2. Microbes Associated with Freshly Prepared Juices of Citrus and Carrots

    Directory of Open Access Journals (Sweden)

    Kamal Rai Aneja

    2014-01-01

    Full Text Available Fruit juices are popular drinks as they contain antioxidants, vitamins, and minerals that are essential for human being and play important role in the prevention of heart diseases, cancer, and diabetes. They contain essential nutrients which support the growth of acid tolerant bacteria, yeasts, and moulds. In the present study, we have conducted a microbiological examination of freshly prepared juices (sweet lime, orange, and carrot by serial dilution agar plate technique. A total of 30 juice samples were examined for their microbiological quality. Twenty-five microbial species including 9 bacterial isolates, 5 yeast isolates, and 11 mould isolates were isolated from juices. Yeasts and moulds were the main cause of spoilage of juices. Aspergillus flavus and Rhodotorula mucilaginosa were observed in the maximum number of juice samples. Among bacteria Bacillus cereus and Serratia were dominant. Escherichia coli and Staphylococcus aureus were detected in few samples. Candida sp., Curvularia, Colletotrichum, and Acetobacter were observed only in citrus juice samples. Alternaria, Aspergillus terreus, A. niger, Cladosporium, and Fusarium were also observed in tested juice samples. Some of the microorganisms detected in these juice samples can cause disease in human beings, so there is need for some guidelines that can improve the quality of fruit juices.

  3. A STUDY OF MICROBES IN FRUIT JUICES, KIMS-AMALAPURAM

    Directory of Open Access Journals (Sweden)

    Nagaraja

    2015-12-01

    Full Text Available INTRODUCTION Fruit and sugarcane juices are nutritious drinks with great taste and health benefits. Food borne illnesses associated with consumption of Fruit and sugarcane juices at several places in India and elsewhere. Fruit juices were served with added ice pieces. Hygienic standards are not maintained while transporting from the field to the place of extraction and preparation. Hence a rapid review of the fruit juices from street vendors has been undertaken along with sugarcane juice. Raw sugarcane juice is a refreshing juice in many parts of Andhra Pradesh. The present study is to assess the prevalence of different organisms from different fruit juices collected from street vendors. METHODS Fruit juices are collected namely sugarcane, sweet lemon, orange, grape apple, pineapple pomegranate. A total 100 samples of fruit juices were collected from road side from different vendors. 150 ml of each variety of fruit juices were collected from different vendors in screw capped bottles and subjected to microbial analysis, processed with in 30mts in the department of microbiology at KIMS by standard methods. RESULTS The analysed samples of fruit juices are found to be contaminated with different bacteria, Escherichia coli 30% Klebsiella pneumoniae 10% Staphylococcus aureus 20% Enterococcus faecalis 04% Pseudomonas aeruginosa 10% ASB 04% (aerobic spore bearers Micrococci 02% Proteus 20% Salmonella. Shigella and Vibrios were not isolated. CONCLUSION It is high time that street vendors should have health education by volunteers, health workers from PHC (primary health centers and people well versed with community medicine practice for implementation of standard hygienic protocols may reduce contamination of fruit and sugarcane juices The concerned health authorities need to ensure and insist to follow the protocols by the vendors and license holders to the vendors.

  4. Inactivation of E.coli O157:H7 and Salmonella on fresh strawberries by antimicrobial washing and coating

    Science.gov (United States)

    Antimicrobial washing, antimicrobial coating, and a combination of both treatments were evaluated for their ability to inactivate artificially inoculated foodborne pathogens and native microflora on strawberries stored at 4 degrees C. Strawberries were inoculated with a six-strain composite of E. co...

  5. Polyphenol-Rich Strawberry Extract Protects Human Dermal Fibroblasts against Hydrogen Peroxide Oxidative Damage and Improves Mitochondrial Functionality

    Directory of Open Access Journals (Sweden)

    Francesca Giampieri

    2014-06-01

    Full Text Available Strawberry bioactive compounds are widely known to be powerful antioxidants. In this study, the antioxidant and anti-aging activities of a polyphenol-rich strawberry extract were evaluated using human dermal fibroblasts exposed to H2O2. Firstly, the phenol and flavonoid contents of strawberry extract were studied, as well as the antioxidant capacity. HPLC-DAD analysis was performed to determine the vitamin C and β-carotene concentration, while HPLC-DAD/ESI-MS analysis was used for anthocyanin identification. Strawberry extract presented a high antioxidant capacity, and a relevant concentration of vitamins and phenolics. Pelargonidin- and cyanidin-glycosides were the most representative anthocyanin components of the fruits. Fibroblasts incubated with strawberry extract and stressed with H2O2 showed an increase in cell viability, a smaller intracellular amount of ROS, and a reduction of membrane lipid peroxidation and DNA damage. Strawberry extract was also able to improve mitochondrial functionality, increasing the basal respiration of mitochondria and to promote a regenerative capacity of cells after exposure to pro-oxidant stimuli. These findings confirm that strawberries possess antioxidant properties and provide new insights into the beneficial role of strawberry bioactive compounds on protecting skin from oxidative stress and aging.

  6. Polyphenol-rich strawberry extract protects human dermal fibroblasts against hydrogen peroxide oxidative damage and improves mitochondrial functionality.

    Science.gov (United States)

    Giampieri, Francesca; Alvarez-Suarez, José M; Mazzoni, Luca; Forbes-Hernandez, Tamara Y; Gasparrini, Massimiliano; Gonzàlez-Paramàs, Ana M; Santos-Buelga, Celestino; Quiles, José L; Bompadre, Stefano; Mezzetti, Bruno; Battino, Maurizio

    2014-06-11

    Strawberry bioactive compounds are widely known to be powerful antioxidants. In this study, the antioxidant and anti-aging activities of a polyphenol-rich strawberry extract were evaluated using human dermal fibroblasts exposed to H2O2. Firstly, the phenol and flavonoid contents of strawberry extract were studied, as well as the antioxidant capacity. HPLC-DAD analysis was performed to determine the vitamin C and β-carotene concentration, while HPLC-DAD/ESI-MS analysis was used for anthocyanin identification. Strawberry extract presented a high antioxidant capacity, and a relevant concentration of vitamins and phenolics. Pelargonidin- and cyanidin-glycosides were the most representative anthocyanin components of the fruits. Fibroblasts incubated with strawberry extract and stressed with H2O2 showed an increase in cell viability, a smaller intracellular amount of ROS, and a reduction of membrane lipid peroxidation and DNA damage. Strawberry extract was also able to improve mitochondrial functionality, increasing the basal respiration of mitochondria and to promote a regenerative capacity of cells after exposure to pro-oxidant stimuli. These findings confirm that strawberries possess antioxidant properties and provide new insights into the beneficial role of strawberry bioactive compounds on protecting skin from oxidative stress and aging.

  7. Effect of high pressure treatment on the survival of Shiga-Toxin producing Escherichia coli in strawberries

    Science.gov (United States)

    Most fresh produce, such as strawberries, receives minimal processing and is often eaten raw. Contamination of produce with pathogenic bacteria may occur during growth, harvest, processing, transportation, and storage and presents a serious public health risk. Strawberries have been implicated in ...

  8. Impact of High-Power Pulsed Light on Microbial Contamination, Health Promoting Components and Shelf Life of Strawberries

    Directory of Open Access Journals (Sweden)

    Irina Buchovec

    2013-01-01

    Full Text Available The aim of this work is to evaluate the impact of high-power pulsed light (HPPL on the microbial control and nutritional properties of strawberries. Berries were treated with HPPL and afterwards analyzed in terms of microbial contamination, shelf life extension, antioxidant capacity, firmness, total phenolic, total anthocyanin and ascorbic acid content, and colour. Results indicate that the decontamination of strawberries by HPPL was significant compared to control. Naturally distributed mesophilic bacteria on the surface of strawberries were inactivated by 2.2 log, and inoculated Bacillus cereus and Listeria monocytogenes were inactivated by 1.5 and 1.1 log, respectively. Yeasts/microfungi distributed on the surface of strawberries were inactivated by 1 log. The shelf life of treated strawberries was extended by 2 days. The increase of temperature on the surface of fruit never exceeded 42 °C. No significantly important differences were observed in total phenolic, total anthocyanin and ascorbic acid content, and antioxidant capacity of strawberry fruits before and after pulsed light treatment. Moreover, no impact on the strawberry colour or firmness was found after HPPL treatment. In conclusion, HPPL is fast, effective, non-thermal and environmentally friendly technique which can be applied for microbial control of strawberries.

  9. Statement on ‘toothkind’ juice drinks

    DEFF Research Database (Denmark)

    Tetens, Inge

    2011-01-01

    or sugar-containing non-alcoholic beverages with an equivalent number of servings of „toothkind‟ juice drink. In the context of the claim, „reduction of tooth demineralisation‟ has a similar meaning to „maintenance of tooth mineralisation‟. © European Food Safety Authority, 2011....... consumption of a beverage is an appropriate measure of the potential of beverages for demineralisation of dental enamel. „Toothkind‟ drinks have little or no potential for enamel demineralisation by this process, while typical sugar-containing non-alcoholic beverages do have the potential for demineralisation...... of dental enamel. However, the beneficial effect (reducing net tooth demineralisation) of replacing typical sugar-containing non-alcoholic beverages with „toothkind‟ juice drinks was only shown to occur at a frequency of consumption of typical sugar-containing non-alcoholic beverages of 7 times daily...

  10. Plant probiotic bacteria Bacillus and Paraburkholderia improve growth, yield and content of antioxidants in strawberry fruit.

    Science.gov (United States)

    Rahman, Mosaddiqur; Sabir, Abdullah As; Mukta, Julakha Akter; Khan, Md Mohibul Alam; Mohi-Ud-Din, Mohammed; Miah, Md Giashuddin; Rahman, Mahfuzur; Islam, M Tofazzal

    2018-02-06

    Strawberry is an excellent source of natural antioxidants with high capacity of scavenging free radicals. This study evaluated the effects of two plant probiotic bacteria, Bacillus amylolequefaciens BChi1 and Paraburkholderia fungorum BRRh-4 on growth, fruit yield and antioxidant contents in strawberry fruits. Root dipping of seedlings (plug plants) followed by spray applications of both probiotic bacteria in the field on foliage significantly increased fruit yield (up to 48%) over non-treated control. Enhanced fruit yield likely to be linked with higher root and shoot growth, individual and total fruit weight/plant and production of phytohormone by the probiotic bacteria applied on plants. Interestingly, the fruits from plants inoculated with the isolates BChi1 and BRRh-4 had significantly higher contents of phenolics, carotenoids, flavonoids and anthocyanins over non-treated control. Total antioxidant activities were also significantly higher (p < 0.05) in fruits of strawberry plants treated with both probiotic bacteria. To the best of our knowledge, this is the first report of significant improvement of both yield and quality of strawberry fruits by the application of plant probiotic bacteria BChi1 and BRRh-4 in a field condition. Further study is needed to elucidate underlying mechanism of growth and quality improvement of strawberry fruits by probiotic bacteria.

  11. Nutritional and nutraceutical comparison of Jamaican Psidium cattleianum (strawberry guava) and Psidium guajava (common guava) fruits.

    Science.gov (United States)

    McCook-Russell, Kayanne P; Nair, Muraleedharan G; Facey, Petrea C; Bowen-Forbes, Camille S

    2012-09-15

    Psidium cattleianum (strawberry guava) is one of many underutilised edible fruits that grow wild in Jamaica, and could potentially be commercially exploited to yield health and economic benefits. In this study, the total phenolics, proximate contents, and antioxidant, anti-inflammatory, and antimicrobial activities of P. cattleianum and P. guajava (common guava), a well-known species, were compared. Strawberry guavas were found to be superior to common guavas in antioxidant and antimicrobial activities, total phenolics and vitamin C content. They also possessed relatively high fibre content (24.9%). The hexane and ethyl acetate extracts of strawberry guavas showed cyclooxygenase-2 enzyme inhibitory activities of 18.3% and 26.5%, respectively (250 μg/mL), indicating anti-inflammatory activity. The EtOAc and MeOH extracts of P. guajava showed 56.4% (COX-2) and 44.1% (COX-1) inhibitory activity, respectively. Additionally, nine compounds were isolated from strawberry guava fruits, some of which demonstrated anti-inflammatory activity. These results indicate that strawberry guavas are beneficial for health. Copyright © 2012 Elsevier Ltd. All rights reserved.

  12. Energy and economic analysis of greenhouse strawberry production in Tehran province of Iran

    International Nuclear Information System (INIS)

    Banaeian, Narges; Omid, Mahmoud; Ahmadi, Hojat

    2011-01-01

    The aims of this study were to determine energy use pattern, to investigate the energy use efficiency, and to make an economical analysis in greenhouse strawberry production in Iran. Data used in this study were obtained from 25 greenhouse strawberry growers using a face to face questionnaire method. The results indicate that greenhouse strawberry production consumed a total energy of 121891.33 MJ ha -1 . About 78% of this was generated by diesel fuel, 10% from chemical fertilizers, and 4.5% from electricity. Energy ratio, specific energy, net energy and energy intensiveness of greenhouse strawberry production were 0.15, 12.55 MJ kg -1 , -683488.37 MJ ha -1 and 8.18 MJ $ -1 , respectively. Determination of the efficient allocation of energy resources were modeled by Cobb-Douglas production function. Econometric model evaluation showed the impact of human labor, fertilizers, installation of equipment and transportation costs for strawberry production were all significant at 1% level. The elasticity estimates indicated that among the cost inputs, transportation is the most important input (-0.75) that influences total cost of production, followed by labor (0.31), fertilizers (0.18) and installation of equipments (0.22). The benefit-cost ratio and net return were obtained as 1.74 and 151907.91 $ ha -1 , respectively.

  13. Chemical evaluation of strawberry plants produced by tissue culturing of gamma irradiated seedlings

    International Nuclear Information System (INIS)

    Maraei, R.W.

    2007-01-01

    studies were conducted to evaluate the influence of gamma irradiation as a supplementary factor precedes tissue culture application on strawberry seedlings (c.v.Rosa Linda). the strawberry seedling were irradiated using 8 doses of co 60 gamma rays 50.75.100.125 ,150,250, 350 and 500 gray. tissue culture technique was applied on irradiated and unirradiated strawberry seedling. different characteristics of plantlets, plant and fruit of strawberry produced from the double treatment (irradiation followed by tissue culture) were studied as well as the early, total and exportable fruit yields. data indicated that, low radiation doses 50,75 and 100 gray increased all morphological and chemical characteristics of the plantlets, plant and fruit of strawberry, whereas radiation doses higher than 100 gray decreased them significantly. moreover 350 and gray were lethal doses. radiation dose 50 gray increased the survival percentage and the length of plantlets by 1.5% and 50% respectively more than the unirradiated treatment in all multiplication stages

  14. Spatial distribution of phytophagous mites (Aca ri: Tetranychidae) on strawberry plants

    International Nuclear Information System (INIS)

    Fadini, Marcos A.M.; Venzon, Madelaine; Oliveira, Hamilton G.; Pallini, Angelo; Vilela, Evaldo F.

    2007-01-01

    Many phytophagous mites can attack strawberry plants, Fragaria x ananassa, among them the southern red mite, Oligonychus ilicis McGregor, and the two-spotted spider mite, Tetranychus urticae Koch. They are found together feeding on the same plant on the upper and underside of the leaves, respectively. Here we studied the choice for feeding sites of O. ilicis and T. urticae on strawberry plants. The first hypothesis tested whether the feeding site choice would be related to the fitness of the species. The second hypothesis dealt whether the feeding site would be determined by the presence of a heterospecific mite. We evaluated the preference, biology and reproductive success of O. ilicis and T. urticae on the under and upper side surface of strawberry leaves infested or not by the heterospecific. O. ilicis preferred to stay on the upper side surface while T. urticae preferred the underside. The preference for the leaf surface correlated with the reproductive success of the species (measured by the intrinsic growth rate). The choice pattern of feeding sites did not alter when the choice test was applied using sites previously infested by heterospecific. Although O. ilicis and T. urticae, apparently, do not interact directly for feeding sites, there is a chance that the first species induces defenses in strawberry plant enabling to reduce the fitness of the second species. The possibility of those species stay together on strawberry plant increases the damage capacity to the culture. (author)

  15. Enhanced bioavailability of lycopene when consumed as cis-isomers from tangerine compared to red tomato juice, a randomized, cross-over clinical trial.

    Science.gov (United States)

    Cooperstone, Jessica L; Ralston, Robin A; Riedl, Ken M; Haufe, Thomas C; Schweiggert, Ralf M; King, Samantha A; Timmers, Cynthia D; Francis, David M; Lesinski, Gregory B; Clinton, Steven K; Schwartz, Steven J

    2015-04-01

    Tangerine tomatoes (Solanum lycopersicum) are rich in tetra-cis-lycopene resulting from natural variation in carotenoid isomerase. Our objective was to compare the bioavailability of lycopene from tangerine to red tomato juice, and elucidate physical deposition forms of these isomers in tomatoes by light and electron microscopy. Following a randomized cross-over design, subjects (n = 11, 6 M/5 F) consumed two meals delivering 10 mg lycopene from tangerine (94% cis) or red tomato juice (10% cis). Blood was sampled over 12 h and triglyceride-rich lipoprotein fractions of plasma were isolated and analyzed using HPLC-DAD-MS/MS. Lycopene was crystalline in red tomato chromoplasts and globular in tangerine tomatoes. With tangerine tomato juice we observed a marked 8.5-fold increase in lycopene bioavailability compared to red tomato juice (p rich foods. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  16. INFLUENCE OF CHEMICAL FERTILIZATION ON STRAWBERRY FRUIT PRODUCTION

    Directory of Open Access Journals (Sweden)

    Alina Florea

    2014-12-01

    Full Text Available The nutritional control of strawberry is very difficult, because a large number of factors influence the absorption and availability of nutrients through mechanisms that are not fully understood. Aim is to establish concrete measures for improving crop technology by applying optimum dose of fertilizers, leading to increased productivity and fruit quality of strawberry culture. The research was conducted during 2009-2011, in a two-way experience. It was located at the Institute of Research - Institute for Fruit Growing Pitesti. Experimental factors were: A - cultivars: a1 - Onebor, a2 – Real, a3 - Elsanta a3, a4 - Magic, a5 - Alba, a6 – Premial; a7-Queen Elisa; B – Fertilizer with 6 graduations: b1 - unfertilized, and five graduations b2 - b6 were applied mixtures of the below fertilizers, thus: b2 - 6.4 kg/ha/week, b3 - 14.3 kg/ha/week, b4 - 21.4 kg/ha/week, b5 - 28.5 kg/ha/week and b6 - 35.8 kg/ha/week. The fertilizers applied were: Polyfeed (N19: P19: K19, potassium nitrate (N12: P0: K43: Mg2 and Magnisal (N11: P0: K0: Mg15. Mixtures were applied at 2 weeks intervals, as follows: 1 April to 15 May (flowering time, 2 applications, containing macroelements N: P: K: Mg - 14:6,3:20,7:5,7 g/100 g mixed fertilizers; May 15 - June 15 (in the picking period, 2 applications of N: P: K: Mg 10,2:6,3:13,5:2,83 g/100 g blend fertilizer and August 1 to September 15 (2 applications with N: P: K: Mg 12,2:6,3:20,7:31,6 g/100 g mixed fertilizers. Following determinations were made: number of fruit per plant, average weight of fruit (g by weighing a sample of 250 fruits and production in tons/hectare. Experimental treatments have led to differences in fruit production. Thus, the analysis of fertilizer doses on the chemical components of the fruits of the seven studied cultivars, we concluded that V5 and V6 treatments had a positive influence on number of fruit per plant and on yielding capacity. Treatments induced also, highest average fruit weight in

  17. Structural changes in cell wall pectins during strawberry fruit development.

    Science.gov (United States)

    Paniagua, Candelas; Santiago-Doménech, Nieves; Kirby, Andrew R; Gunning, A Patrick; Morris, Victor J; Quesada, Miguel A; Matas, Antonio J; Mercado, José A

    2017-09-01

    Strawberry (Fragaria × anannasa Duch.) is one of the most important soft fruit. Rapid loss of firmness occurs during the ripening process, resulting in a short shelf life and high economic losses. To get insight into the role of pectin matrix in the softening process, cell walls from strawberry fruit at two developmental stages, unripe-green and ripe-red, were extracted and sequentially fractionated with different solvents to obtain fractions enriched in a specific component. The yield of cell wall material as well as the per fresh weight contents of the different fractions decreased in ripe fruit. The largest reduction was observed in the pectic fractions extracted with a chelating agent (trans-1,2- diaminocyclohexane-N,N,N'N'-tetraacetic acid, CDTA fraction) and those covalently bound to the wall (extracted with Na 2 CO 3 ). Uronic acid content of these two fractions also decreased significantly during ripening, but the amount of soluble pectins extracted with phenol:acetic acid:water (PAW) and water increased in ripe fruit. Fourier transform infrared spectroscopy of the different fractions showed that the degree of esterification decreased in CDTA pectins but increased in soluble fractions at ripen stage. The chromatographic analysis of pectin fractions by gel filtration revealed that CDTA, water and, mainly PAW polyuronides were depolymerised in ripe fruit. By contrast, the size of Na 2 CO 3 pectins was not modified. The nanostructural characteristics of CDTA and Na 2 CO 3 pectins were analysed by atomic force microscopy (AFM). Isolated pectic chains present in the CDTA fractions were significantly longer and more branched in samples from green fruit than those from red fruit. No differences in contour length were observed in Na 2 CO 3 strands between samples of both stages. However, the percentage of branched chains decreased from 19.7% in unripe samples to 3.4% in ripe fruit. The number of pectin aggregates was higher in green fruit samples of both

  18. STUDY OF THE EFFECTS SHOWN BY THE ACTION OF VARIOUS MICROORGANISMS ON THE LACTIC FERMENTATION OF JUICES

    Directory of Open Access Journals (Sweden)

    Iuliana Manea

    2010-01-01

    Full Text Available Research has established the most effective lactic acid bacteria used for fermentation of fruit and vegetables juices. The cultures were used for Bifidobacteria, Lactobacillus acidophilus and culture of micro flora obtained spontaneous shoots. Lactic fermented juice was obtained from cabbage, carrots and beetroot. Working in these variants were determined lactic fermentation parameters and some of the bioactive compounds from this process: pH, reducing sugars, viable cell counts. Determination of reducing sugars calculated as glucose was conducted using the 3.5 dinitrosalicilic acid method (DNS method, pH was determined with a pH meter electronics. Chemical parameters listed were determined every two hours during the first 24 hours, then 48 and 72 hours in thermostatic conditions at 37 degrees C and 7 days storage at refrigerator temperature. At the end of the lactic fermentation, the lowest pH 4.31, which also provide juice conservation was obtained using a pure culture of Lactobacillus acidophilus. Reducing sugar is metabolized significantly when the juice of beetroot, fermented with Lactobacillus acidophilus culture, 75.19%. The results may be an argument for obtaining juice fermented lactic acid, which are popular functional foods, to obtain a chemical composition and sensory their optimum.

  19. Effect of irradiation and blanching on the quality of juices of Spuriopinella bracycarpar during storage

    International Nuclear Information System (INIS)

    Oh, D.H.; Ham, S.S.; Lee, S.Y.; Park, B.K.; Kim, S.H.; Chung, C.K.; Kang, I.J.

    1998-01-01

    The research was investigated to determine the effect of irradiation or blanching either alone or in combination on the shelf-life of juices of Spuriopinella bracycarpar during storages. The juices was made from fresh or blanced Spuriopinella bracycarpar and gamma irradiated at the doses (0.5 kGy to 5 kGy). Microbial growth, color change, vitamin C, and sensory evaluation were evaluated during storage at 4 and 25℃. Blanched juices had little effect on the inhibition of microbial growth compared to that of fresh juices. However, significant reduction of microbial counts was observed in the 0.5 kGy irradiation of both juices and inhibition efficiency was greatly increased when irradiated juices was stored at 4℃ rather than at room temperature. Fresh juices without irradiation were little different from the irradiated fresh juices until 20d storage on color change because the juices was rapidly browned immediately after getting the juices from extractor, but blanched juices showed more bright and clear color than that of fresh juices. However, irradiated blanched juices showed greatly reduced the L, a, and b value compared to the non-irradiated blanched juices during storage. The loss of vitamin C from non-irradiated fresh juices was increased during storage and the irradiated fresh juices had little effect on the vitamin C change compared to the non-irradiated fresh juices. However, blanched juices showed less reduction of vitamin C than fresh juices and the irradiated blanched juices had little difference on the vitamin C change compared to the non-irradiated blanched juices, and both treatment showed less vitamin C loss at 4℃ storage. Fresh juces showed more strong grass flavor and biterness than blanched juices and irradiated fresh juices showed little difference on brightness, grass flavor, bitterness, freshness and acceptability, but irradiated blanched juices had better sensory evaluation on grass flavor, bitterness, freshness, and acceptability than non

  20. Analytical characterization of some pasteurized apple juices during storage

    Directory of Open Access Journals (Sweden)

    Damian Cristina

    2015-06-01

    Full Text Available The aim of the study was to assess the effect of three weeks of storage on the chemical and rheological properties of apple juices obtained from Idared and Jonatan apples variety. Total antioxidant activity, levels of bio-active compound groups and the viscosity were measured to characterize the investigated juices. The method applied for the determination of ascorbic acid concentration was with 2, 6-diclorophenolindophenol. Total phenols (TP in apple juices were determined using the Folin-Ciocalteau method and antioxidant activity by the use of DPPH free radical method. The viscosity of apple juices was investigated by a rotational viscometer, Brookfield viscometer (Brookfield Engineering Inc., Model RV-DV I Prime with RV spindles. During three weeks of storage, different rates of all measured properties have been observed decreasing for both studied apples varieties juices. The juices from Jonatan apples have higher antioxidant activities that are correlated with the higher content in polyphenols and lower values of viscosity.

  1. The Branding of Sugarcane Juice in India

    Directory of Open Access Journals (Sweden)

    R. Sinha

    2014-06-01

    Full Text Available Sugarcane juice is traditionally sold in India by roadside vendors, often in unhygienic conditions. That’s why a few entrepreneurs have taken the initiative venturing into the marketing of branded sugarcane juice through a chain of franchised outlets. Initial indications are that this model is headed for success. Pune, Kolhapur, more known for its leather chappals, has also been blessed with an abundance of milk, water and sugar, which has made the region the nation's kitchen for many years. The Warana milk producers' cooperative located here has lived up to this reputation. It has been a contract manufacturer for products such as Cadbury's Bournvita, butter for Britannia Industries and Soya milk for Ruchi Soya. Now, the cooperative is preparing to assert its own identity through the launch of Warana Joy, its national brand. Among its new products is sugarcane juice in aseptic packs (Tetra Pak. This article outlines the development of this business; the opportunities and threats faced and also offer suggestions for the growth in this market.

  2. The Branding of Sugarcane Juice in India

    Directory of Open Access Journals (Sweden)

    Rajendra Sinha

    2014-01-01

    Full Text Available Sugarcane juice is traditionally sold in India by roadside vendors, often in unhygienic conditions. That’s why a few entrepreneurs have taken the initiative venturing into the marketing of branded sugarcane juice through a chain of franchised outlets. Initial indications are that this model is headed for success. Pune, Kolhapur, more known for its leather chappals, has also been blessed with an abundance of milk, water and sugar, which has made the region the nation's kitchen for many years. The Warana milk producers' cooperative located here has lived up to this reputation. It has been a contract manufacturer for products such as Cadbury's Bournvita, butter for Britannia Industries and Soya milk for Ruchi Soya. Now, the cooperative is preparing to assert its own identity through the launch of Warana Joy, its national brand. Among its new products is sugarcane juice in aseptic packs (Tetra Pak. This article outlines the development of this business; the opportunities and threats faced and also offer suggestions for the growth in this market.

  3. Experimental study on bread yeast cultured in sweet sorghum juice

    International Nuclear Information System (INIS)

    Wang Jufang; Dong Xicun; Li Wenjian; Xiao Guoqing; Ma Liang; Gao Feng

    2008-01-01

    As a substitute for food supplies, sweet sorghum juice with high grade has demonstrated out- standing advantage in fermentation. To obtain the optimized fermentation conditions, the growth, the bio- mass of bread yeast cultured in sweet sorghum juice and total residual sugar were investigated in the paper. The fermentation was performed and optimized in a 10-100 1 bio-reactor. The results show that the application of sweet sorghum juice in bread yeast production is very potential. (authors)

  4. Observation on CEA and IL-6 contents in gastric juice

    International Nuclear Information System (INIS)

    Jiang Zhonglin

    2003-01-01

    Objective: To study the changes of CEA and IL-6 contents in blood and gastric juice in patients with gastric cancer and gastritis. Methods: CEA and IL-6 contents in blood and gastric juice were measured with RIA in 60 patients and 30 controls. Results: Gastric juice CEA and IL-6 contents in patients with gastric carcinoma were significantly higher than those in the controls (p < 0.001), however, CEA and IL-6 contents in patients with gastritis and controls were not much different. Conclusion: Gastric juice CEA and IL-6 assay is of diagnostic significance in patients with gastric malignant tumor

  5. Research on the Influencing Factors of China Apple Juice Trade

    OpenAIRE

    Du Juan

    2013-01-01

    China is the first country in the world in which apple juice is produced and exited and the main producing area is concentrated in the north of China. Some domestic companies which export apple juice are founded. China’s apple juice, mainly exported to USA, Japan and the Europe, has a strong international competitiveness. However, due to the breed and raw material, Chinese apple juice export faces some challenge, like the loss happening in the transport process. The objective of this study is...

  6. STUDY ON THE ACCEPTABILITY OF YOGHURT WITH CARROT JUICE

    Directory of Open Access Journals (Sweden)

    Ana LEAHU

    2017-06-01

    Full Text Available In this paper we focus on the results of a study regarding the evaluation of the sensory characteristics and consumers’ acceptance of unsweetened yoghurt with carrot juice. The yoghurts were obtained considering three carrot juice levels (10%, 20% and 30%, respectively and two starter cultures. Carrot yoghurt was prepared in the laboratory by adding carrot juice to milk and inoculated with a 3% yoghurt culture. The effects of the carrot juice on the sensory quality and consumers’ aceptance of the yoghurt samples were determined. The data obtained on various parameters were statistically analyzed.

  7. Vegetative and reproductive performances of irradiated strawberry plants

    International Nuclear Information System (INIS)

    Velchev, V.; Stoyanov, S.

    1982-01-01

    The effect of radioactive gamma-irradiation (Cs 137 source with 600 rad/min intensity) at 250 to 1500 rad of the vegetative and reproductive performances of the strawberry was studied, under field conditions with the cvs. Gorella, Cambridge Favourite, and Zenga Zengana. It was found that in all cvs. the highest stimulating effect in respect to number of leaves was produced by rates of 1000 and 1500 rad. Irradiation with 750 and 1000 rad had a stimulating effect on the formation of more flower buds and flowers in Gorella and Cambridge Favourite, while similar effect was evident in Zenga Zengana only at 1000 rad. Radioactive irradiation had different effect on the yield of the cultivars studied. A positive after-effect was observed in the second year in Gorella at 1000 rad - 117512 kg/ha; by Zenga Zengana at 750 rad - 337237 kg/ha; and by Cambridge Favourite at 250 rad - 199766 kg/ha, which represented 113,02; 111,25 and 105.00% respectively as compared to the control

  8. Post-harvest conservation of organic strawberries coated with cassava starch and chitosan

    Directory of Open Access Journals (Sweden)

    Raquel P Campos

    2011-10-01

    Full Text Available The strawberry is as non-climacteric fruit, but has a high post-harvest respiration rate, which leads to a rapid deterioration at room temperature. This study aimed to evaluate the application of biodegradable coating on postharvest conservation of organic strawberries, cv. Camarosa, packed in plastic hinged boxes and stored at 10ºC. The treatments consisted of: a control; b 2% cassava starch; c 1% chitosan; and d 2% cassava starch + 1% chitosan. Physical and chemical characteristics of fruits were evaluated at 3, 6 and 9 days of storage, and microbiological and sensory analyses were carried out at the end of the storage period. The treatments influenced positively the post-harvest quality of organic strawberries. The coating cassava starch + chitosan provided the best results, with less than 6% of loss in fruit mass, lower counts of yeast and psychrophilic microorganisms and the best appearance according to the sensory analysis.

  9. Cloning and expression analysis of FaPR-1 gene in strawberry

    Science.gov (United States)

    Mo, Fan; Luo, Ya; Ge, Cong; Mo, Qin; Ling, Yajie; Luo, Shu; Tang, Haoru

    2018-04-01

    The FaPR-1 gene was cloned by RT-PCR from `Benihoppe' strawberry and its bioinformatics analysis was conducted. The results showed that the open reading frame was 483 bp encoding encoding l60 amino acids which protein molecular weight and theoretical isoelectricity were 17854.17 and 8.72 respectively. Subcellular localization prediction shows that this gene is located extracellularly. By comparing strawberry FaPR-l and other plant Pathogenesis-related protein, homology and phylogenetic tree construction showed that the homology with grapes, peach is relatively close. In the treatments of ABA, sucrose and the mixture of the two, the expression of FaPR-1 in strawberry fruit were significantly increased.

  10. Effect of xanthan gum on the release of strawberry flavor in formulated soy beverage.

    Science.gov (United States)

    Xu, Jiao; He, Zhiyong; Zeng, Maomao; Li, Bingbing; Qin, Fang; Wang, Linxiang; Wu, Shengfang; Chen, Jie

    2017-08-01

    The effects of xanthan gum on the release of strawberry flavor compounds in formulated soy protein isolate (SPI) beverage were investigated by headspace gas chromatography (GC). Seven strawberry flavor compounds (limonene, ethyl hexanoate, (Z)-3-hexenyl acetate, ethyl 2-methylbutanoate, ethyl butanoate, (Z)-3-hexen-1-ol and diacetyl) could be detected by GC and hence analyzed the gas-matrix partition coefficients (K). The release of flavor compounds was restrained in SPI and/or xanthan gum solution. The retention of (Z)-3-hexen-1-ol, limonene and diacetyl significantly changed (pfuraneol) accelerated the release of ester compounds to some extent in different matrices. The above results demonstrated that presence of SPI and xanthan gum could bring about an imbalance in the strawberry flavor. Copyright © 2017 Elsevier Ltd. All rights reserved.

  11. Suitability of Dukat strawberries for studying effects on shelf life of irradiation combined with cold storage

    International Nuclear Information System (INIS)

    Zegota, H.

    1988-01-01

    A new Dukat variety of strawberries was used to study the effect of irradiation combined with cold storage on their shelf life and chemical composition. Strawberries, with or without stems, were irradiated with a dose of 2.5 or 3.0 kGy within 6-10 or 20-24 h after harvesting. Results of the sensory evaluation showed that the minimum storage time for the fruits could be extended by a minimum of 9 days. If the time between harvest and irradiation was shorter, better results for storage experiments were obtained. Fruits with stems were more suitable for cold storage after irradiation than those without stems. Irradiation of strawberries did not change the titratable acidity and content of the reducing sugars. Colour intensity and ascorbic acid levels decreased in proportion to the absorbed dose and storage time. (orig.)

  12. The effect of irradiation on the macro- and microstructure of strawberries

    International Nuclear Information System (INIS)

    Voeroes, Zsuzsanna; Kovacs, Etelka; Zackel, Erna

    1985-01-01

    Samples of Gorella, Pocahontas and Rival strawberry varieties were irradiated (2,5 kGy) by means of a sup(60)Co source to increase storage life. The packaged fruits were stored in cabinets of 80-90% relative vapour content at 5 and 10 deg C, respectively. No significant differences could be found in the refraction % and pH values of the irradiated and control samples and of the packeged and unpackaged samples. Due to irradiation the consistency of fruits softened. At the measurements of strawberries with Instron consistometer the optimal quality marks seem to be obtainable by measuring the deformation steadiness. By means of optical microscopy it was stated that the tissue structure of various strawberry varieties did not alter essentially due to irradiation. (author)

  13. Trophic Interactions between Generalist Predators and the Two Spotted Spide Mite, Tetranychus urticae in, Strawberry

    DEFF Research Database (Denmark)

    Jacobsen, Stine Kramer

    The two spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is a major cause of pest damage worldwide. Its host range includes among many the strawberry crop, a high value crop in Denmark as well as in many other temperate and subtropical regions. Chemical control of T. urticae...... occurrence and diversity of predatory insects and predatory mites in Danish strawberry fields and surrounding vegetation is lacking, as is the knowledge of the potential of generalist insect predators to control T. urticae. The overall objective of this PhD thesis was to investigate the trophic interactions...... between natural enemies, in particular generalist predators and the two spotted spider mite, T. urticae, in strawberry. This was done by investigating interactions of T. urticae and its natural enemies as influenced by cropping practice and the surrounding vegetation (Manuscript I) as well as more...

  14. Study of Trehalose Addition on Aroma Retention in Dehydrated Strawberry Puree

    Directory of Open Access Journals (Sweden)

    Draženka Komes

    2003-01-01

    Full Text Available In order to improve the quality of dehydrated fruit products, the influence of the addition of two sugars (sucrose and trehalose on the retention of aroma components during dehydration of strawberry puree was investigated. Manual headspace solid-phase microextraction (SPME, containing polydimethylsiloxane coated fibre (100 μm coupled with gas chromatography (GC-FID and GC-MS was used for the analysis of the aroma of strawberry puree dehydrated by using freeze drying and foam-mat drying. The analytes identified included esters, carbonyl compounds, terpenoids, several alcohols and acids. The results obtained in this study give further insight into the mechanisms concerning the application of trehalose as flavouring additive, due to its ability to retain and preserve the fruit volatiles responsible for the characteristic flavour of fresh fruits during dehydration processes. The best retention of aroma components in dehydrated strawberry puree was obtained by trehalose addition when combined with freeze drying.

  15. Strawberry gingivitis as the first presenting sign of wegener's granulomatosis: report of a case

    Science.gov (United States)

    2011-01-01

    Wegener's granulomatosis is a rare multi-system disease characterized by the classic triad of necrotizing granulomas affecting the upper and lower respiratory tracts, disseminated vasculitis and glomerulonephritis. Oral lesions as a presenting feature are only encountered in 2% of these cases. Hyperplastic gingival lesions or strawberry gingivitis, is a characteristic sign of Wegener's granulomatosis. The latter consists of reddish-purple exophytic gingival swellings with petechial haemorrhages thus resembling strawberries. Recognition of this feature is of utmost importance for timely diagnosis and definitive management of this potentially fatal disease. A case of strawberry gingivitis as the first presenting sign of Wegener's granulomatosis affecting a 50-year-old Malay male is reported here. The differential diagnosis of red lesions that may present in the gingiva is discussed. PMID:21813375

  16. THE IMPACT OF ENVIRONMENTALLY FRIENDLY POSTHARVEST TREATMENTS ON THE ANTIOXIDANT ACTIVITY OF STRAWBERRY FRUITS DURING STORAGE

    Directory of Open Access Journals (Sweden)

    Ivna Štolfa

    2014-12-01

    Full Text Available Proper postharvest storage is an effective way to maintain the quality and nutritional values of fruits. The aim of this study was to determine how environmentally friendly postharvest treatments with salicylic acid solution, colloidal silver solution and ozone, affect the antioxidant activity of strawberry fruits (Fragaria x ananassa Duch. cv. Albion during 7 days of storage at 4°C. The content of ascorbic acid, total phenols and antioxidant activity of strawberry fruits were determined spec-trophotometrically. After 7 days of storage in strawberry fruits treated with all three treatments separately, the contents of ascorbic acid were higher than in the control fruits, supporting the usefulness of these treatments for preserving fruit quality and nutritional value during storage. The treatment with salicylic acid solution showed the most beneficial effect during storage causing a significant increase in the content of ascorbic acid, phenols and antioxidant activity at the end of the storage period.

  17. Interactions among spectral components of radiation in the growth responses of rice, tomato and strawberry

    International Nuclear Information System (INIS)

    Inada, K.; Matsuno, A.

    1985-01-01

    Effects of spectral components and their ratios of radiation on simultaneous growth responses were investigated with rice, tomato and strawberry plants exposed to lights with a high fluence rate (350 or 408 μmol m -2 s -1 , 400-700 nm) during every daytime. Both elongation growth and Ieaf area development in rice and strawberry were promoted by red (R) but inhibited by blue (B) component depending on the each fluence rate. However, leaf area in tomato responded in opposite direction to these. The elongation growth was remarkably increased with the fluence rate of far-red (FR) in tomato and strawberry, but not in rice. These responses were lineary increased, except FR and UV effects, with logarithmic R/B ratio in rice and strawberry but not in tomato. A very low R/FR ratio caused a strong promotion of both elongation and leaf area in tomato, while it promoted petiole elengation but inhibited leaf area development in strawberry. The elongation and leaf area development responded to R/FR in reverse way between rice and strawberry. Chlorophyll content of leaves was generally decreased with the increase of logarithmic R/B ratio in all the species. Areal weight of leaf and dry weight increment/leaf area were more or less increased with R/B and R/ FR ratios, Dry weight increment varied with the spectral ratios in almost the same way as leaf area, suggesting that spectral dependence of photosynthetic production was not much different between the species. Some discussions were made on the photoreceptor pigments involved in the elongation growth and leaf area development, and on the selection of light quantity to ensure a normal growth of each plant species

  18. FaPOD27 functions in the metabolism of polyphenols in strawberry fruit (Fragaria sp.

    Directory of Open Access Journals (Sweden)

    Su-Ying eYeh

    2014-10-01

    Full Text Available The strawberry (Fragaria × ananassa is one of the most preferred fresh fruit worldwide, accumulates numerous flavonoids but has limited shelf life due to excessive tissue softening caused by cell wall degradation. Since lignin is one of the polymers that strengthen plant cell walls and might contribute to some extent to fruit firmness monolignol biosynthesis was studied in strawberry fruit. Cinnamoyl-CoA reductase (CCR, cinnamyl alcohol dehydrogenase (CAD, and a peroxidase (POD27 gene were strongly expressed in red, ripe fruit whereas a second POD gene was primarily expressed in green, immature fruit. Moreover, FaPOD27 transcripts were strongly and constitutively induced in fruits exposed to Agrobacterium infection. Gene expression levels and enzymatic activities of FaCCR and FaCAD were efficiently suppressed through RNAi in FaCCR- and FaCAD-silenced strawberries. Besides, significantly elevated FaPOD transcript levels were detected after agroinfiltration of pBI-FaPOD constructs in fruits. At the same time, levels of G-monomers were considerably reduced in FaCCR-silenced fruits whereas the proportion of both G- and S-monomers decisively decreased in FaCAD-silenced and pBI-FaPOD fruits. Development, firmness, and lignin level of the treated fruits were similar to pBI-intron control fruits, presumably attributed to increased expression levels of FaPOD27 upon agroinfiltration. Additionally, enhanced firmness, accompanied with elevated lignin levels, was revealed in chalcone synthase-deficient fruits (CHS-, independent of down- or up-regulation of individual and combined FaCCR, FaCAD, and FaPOD genes by agroinfiltration, when compared to CHS-/pBI-intron control fruits. These approaches provide further insight into the genetic control of flavonoid and lignin synthesis in strawberries. The results suggest that FaPOD27 is a key gene for lignin biosynthesis in strawberry fruit and thus to improving the firmness of strawberries.

  19. Attempts to increase storage stability of strawberry yoghurt by combination treatments

    International Nuclear Information System (INIS)

    Kiss, I.

    1975-01-01

    The aim of the experiments was to establish whether the microbiological stability of strawberry yoghurt might be improved by decreasing the microbial load of the fruit. The effect of heat treatment, freezing, irradiation and various combinations of these treatments upon cell count and sensory quality was investigated. It was established that none of the individual treatments was entirely satisfactory. Surfacial heat treatment at 55 0 C, freezing and irradiation with 0.4-0.6 Mrad substantially increased the storage life of strawberries or that of the yoghurt prepared with this fruit; when compared to yoghurt made with frozen strawberries by the dairy factory, the increase was 2.5 fold at 15 0 C and 3.5 fold at 2 0 C. The relative increase of storage life was lower at lower yeast-cell counts. The strawberries irradiated with doses above 0.2 Mrad showed aroma and flavour changes immediately upon treatment. This effect, however, was eliminated after some days. The yoghurt made with strawberries given a radiation treatment of 0.57 Mrad did not differ organoleptically from the yoghurt made with untreated strawberries. In the knowledge of the survival rate of yeasts after irradiation the D 10 values were established. These were found in the dose range between 0.043 and 0.087 Mrad. It was established that the applied heat treatment, freezing and irradiation at these dose levels and at 10 3 -10 4 cells per gram were not sufficient from the point of view of microbiological stability. (F.J.)

  20. Supercritical CO2 extract from strawberry seeds as a valuable component of mild cleansing compositions.

    Science.gov (United States)

    Sikora, E; Michorczyk, P; Olszańska, M; Ogonowski, J

    2015-12-01

    The aim of this work was an elaboration of mild cleansing compositions, containing supercritical CO2 extract from strawberry seeds (SC-CO2 strawberry seed oil), as a moisturizing and skin-softening agent. The influence of concentration of the oil on user properties of shower/bath products was studied. A series of products (shower/bath cosmetics) composed mainly of mild surfactants (amphoacetates, sulfosuccinates, betaines) and containing different amounts of the oil (0.5 up to 5.0%) were prepared. For the stable products (formulations containing up to 2% of the oil), the influence of the SC-CO2 strawberry seed oil addition on the products' stability, foam ability, surface tension, pH and rheological properties was studied. Moreover, the skin compatibility and moisturizing efficiency of the cleansing products were recorded in a group of 15 volunteers (including 10 women and five men, aged 20-30 years), using skin diagnosis system AramoTS, Aram Huvis Co. Additionally, characterization of CO2 extract from strawberry seeds was performed. Measurements of the oil's analytical constants, that is acid value and saponification number, were conducted according to Polish Standard PN-EN ISO 660:2010 and PN-EN ISO 3657:2013, respectively. The oil concentration influences stability of the products. Only the formulations containing 0.5-2% of the extract have shown high stability. Moreover, used in the amount up to 2% the SC-CO2, strawberry seed oil does not affect significantly the cleansing and foaming properties of the products. The obtained shower/bath cosmetics showed good user properties and additionally good skin-moisturizing effect. The supercritical CO2 extract from strawberry seeds, rich source of unsaturated fatty acid, could be successfully used in the formulation of body washing compositions as a moisturizing and skin-softening agent. © 2015 Society of Cosmetic Scientists and the Société Française de Cosmétologie.

  1. Electrodialytic removal of nitrate from pineapple juice: effect on selected physicochemical properties, amino acids, and aroma components of the juice.

    Science.gov (United States)

    Ackarabanpojoue, Yuwadee; Chindapan, Nathamol; Yoovidhya, Tipaporn; Devahastin, Sakamon

    2015-05-01

    This study aimed at investigating the effect of nitrate removal from pineapple juice by electrodialysis (ED) on selected properties of the ED-treated juice. Single-strength pineapple juice with reduced pulp content was treated by ED to reduce the nitrate concentration to 15, 10, or 5 ppm. After ED, the removed pulp was added to the ED-treated juice and its properties, including electrical conductivity, acidity, pH, total soluble solids (TSS), color, amino acids, and selected aroma compounds, were determined and compared with those of the untreated juice. ED could reduce the nitrate content of 1 L of pineapple juice from an initial value of 50 ppm to less than 5 ppm within 30 min. A significant decrease in the electrical conductivity, acidity, pH, TSS, and yellowness, but a significant increase in the lightness, of the juice was observed upon ED. Concentrations of almost all amino acids of the ED-treated juice significantly decreased. The concentrations of 8 major compound contributors to the pineapple aroma also significantly decreased. Adding the pulp back to the ED-treated juice increased the amino acids concentrations; however, it led to a significant decrease in the concentrations of the aroma compounds. © 2015 Institute of Food Technologists®

  2. Electronics

    Science.gov (United States)

    2001-01-01

    International Acer Incorporated, Hsin Chu, Taiwan Aerospace Industrial Development Corporation, Taichung, Taiwan American Institute of Taiwan, Taipei, Taiwan...Singapore and Malaysia .5 - 4 - The largest market for semiconductor products is the high technology consumer electronics industry that consumes up...Singapore, and Malaysia . A new semiconductor facility costs around $3 billion to build and takes about two years to become operational

  3. Synthesis of gold nanoparticles using renewable Punica granatum juice and study of its catalytic activity

    Science.gov (United States)

    Dash, Shib Shankar; Bag, Braja Gopal

    2014-01-01

    Punica granatum juice, a delicious multivitamin drink of great medicinal significance, is rich in different types of phytochemicals, such as terpenoids, alkaloids, sterols, polyphenols, sugars, fatty acids, aromatic compounds, amino acids, tocopherols, etc. We have demonstrated the use of the juice for the synthesis of gold nanoparticles (AuNPs) at room temperature under very mild conditions. The synthesis of the AuNPs was complete in few minutes and no extra stabilizing or capping agents were necessary. The size of the nanoparticles could be controlled by varying the concentration of the fruit extract. The AuNPs were characterized by surface plasmon resonance spectroscopy, high resolution transmission electron microscopy, fourier transform infrared spectroscopy and X-ray diffraction studies. Catalytic activity of the synthesized colloidal AuNPs has also been demonstrated.

  4. Homogentisic acid: a phenolic acid as a marker of strawberry-tree (Arbutus unedo) honey.

    Science.gov (United States)

    Cabras, P; Angioni, A; Tuberoso, C; Floris, I; Reniero, F; Guillou, C; Ghelli, S

    1999-10-01

    Analysis of organic acids in strawberry-tree (Arbutus unedo) honey showed the presence of an unknown acid as the main constituent. This compound was isolated and identified as homogentisic acid (2, 5-dihydroxyphenylacetic acid) by MS and NMR techniques. Its average content in honey was 378 +/- 92 mg/kg. Analysis of nectar confirmed the floral origin of the compound found in honey. Since this acid was not detected in any of the different monofloral honeys, it could be used as a marker of strawberry-tree (A. unedo) honey.

  5. A comprehensive approach to evaluate the freshness of strawberries and carrots

    DEFF Research Database (Denmark)

    Peneau, S.; Brockhoff, Per B.; Escher, F.

    2007-01-01

    of strawberries and carrots that varied in cultivar, as well as with time and conditions of storage. Product characteristics measured by descriptive sensory and physico-chemical analyses were related to consumer and expert panel (individual and consensus) ratings of freshness. Results showed that a large number...... of attributes contributed to the freshness of strawberries and carrots and that those were also indicators of the physiological ageing of these products. Our results suggest that consumer evaluation of fruit and vegetable freshness corresponds to an evaluation of this ageing process through the observation...

  6. Sucrose and color profiles in sugarcane (Saccharum sp.) juice analyzed by UFLC-ELSD and Synapt High-Definition Mass Spectrometry during radiation treatment

    Science.gov (United States)

    Lima, Roberta B.; de Aguiar, Claudio Lima; Galaverna, Renan; Baptista, Antonio S.; Eberlin, Marcos N.; Arthur, Valter

    2016-04-01

    This work evaluated the effect of electron beam irradiation (E-beam) on sugarcane juice and compared the results with preliminary tests performed on sugarcane juice treated with gamma irradiation. The samples were irradiated at 5, 10 and 20 kGy doses and results were compared wile control samples without irradiation. The results showed a significant increase (p≤0.05) of phenolic compounds in both treatments. We also observed increased contents of reducing sugars (glucose and fructose) for the samples irradiated with gamma rays and E-beam measured by the DNS methods. However, there was no significant difference of sugars content measured by chromatographic analyses performed in the sugarcane juice treated with E-beam. Therefore reducing sugars content could be overestimated by the DNS method because salts in sugarcane juice. The treatments were able to reduce sugarcane juice ICUMSA color intensity in both treatments with irradiation. E-beam reduced sugarcane juice color by roughly 49% compared the control, while gamma irradiation reduced it by 30%.

  7. Cranberry juice for urinary tract infection in children

    OpenAIRE

    Goldman, Ran D.

    2012-01-01

    Question Several children in my clinic are recovering from urinary tract infections (UTI). A mother of one of the children asked me if I recommended cranberry juice for children to prevent future episodes of UTI. She was given cranberry juice after she suffered from a UTI several months ago.

  8. An overview on the Brazilian orange juice production chain

    Directory of Open Access Journals (Sweden)

    Renato Marcio dos Santos

    2013-03-01

    Full Text Available Brazil is the world's largest producer of oranges and uses more than 70% of the harvested fruits in the production of juices. The amount of processed orange is growing about 10% per year, confirming the trend of the Brazilian citrus for juice production. This research aimed to investigate the Brazilian orange juice production chain from 2005 to 2009. Data from the amount of frozen juice produced and exported, international price of orange juice, and intermediate transactions were assessed in order to make possible selection of all interveners involved in the chain. The study using the Social Network Analysis (SNA showed that the densest relationships in the network are from exporters to importers and from orange growers to the orange processing industry. No difference was found in the values of the network geodesic distance or the clustering coefficients from 2005 to 2009. The degree of centrality increased steadily throughout the years indicating that the processing industry attempts to minimize the risks by centralizing the actions. A decrease in export of orange juice from 2007 (2.07 10(6 t to 2008 (2.05 10(6 t was found, probably due to the world's financial crisis with recovery in 2009. Since 2004, there has been an increase of nearly 10% per year in the market preference of concentrate juice (OFCJ when compared to the "not from concentrated" juice (NFC. Nowadays the NFC market represents nearly 50% of all Brazilian export which impacted in the logistic distribution and transportation issues.

  9. Anti-Oxidant effects of pomegranate juice on Saccharomyces ...

    African Journals Online (AJOL)

    Conclusion: Pomegranate juice has a positive effect on fatty acid, vitamin and protein synthesis by Saccharomyces cerevisiae. Accordingly, we believe that it has significantly decreased oxidative damage thereby making a positive impact on yeast development. Key words: Pomegranate juice, SDS-PAGE, fatty acid, vitamin.

  10. Vitamin C stability in pineapple, guava and baobab juices under ...

    African Journals Online (AJOL)

    MASAMBA

    associated with many health benefits such as promoting health cell ... such as juices are processed to ensure availability even when they are not in ... as fruit juices to extend the shelf life. The use of .... results show that vitamin C was highly retained in freezing .... College of Agriculture for providing funding for the work.

  11. Antifungal effects of sisal leaf juice on Lasiodiplodia theobromae ...

    African Journals Online (AJOL)

    Among the nine varieties, the inhibition effects of hybrid 76416 and Agave americana were the best with absolute inhibition of all the leaf juice treatments against the mycelial growth, followed by Agave Amaniensis, Agave virdis, Agave angustifolia and Hybrid 11648. The inhibitory effect of some fresh juices would be cut ...

  12. Cottage processing of cashew apple juice in Nigeria: physico ...

    African Journals Online (AJOL)

    Some manually operated equipment were employed for cottage processing of cashew apples into juice. These include an extractor, mixer pasteuriser and a bottling machine. The apples were preheated with steam for 10, 20 and 30 minutes before juice extraction. The average capacity and efficiency of the extractor were ...

  13. Quality of physalis (Physalis pubescenss L.) juice packaged in glass ...

    African Journals Online (AJOL)

    The objective of our study was to prepare a new processed pasteurized Physalis juice and to study the effects of storage and packaging on its nutritional properties. The pulp was yellowish or orange with a yield of 64%. The fresh juice had a light sweet and acidic taste (pH 3.5). The titratable acidity was 1.43%, polyphenols ...

  14. Bioactive compounds and juice quality from selected grape cultivars

    Directory of Open Access Journals (Sweden)

    Renata Vieira da Mota

    2017-12-01

    Full Text Available ABSTRACT Grape juices have been valued due to their potential health benefits, which have demanded increased grape productivity and quality. Five grape cultivars grown in Brazil, Isabel Precoce, Carmem, Violeta, Concord and Bordo were evaluated in 2013 and 2014 seasons for bioactive components and also for juice processing quality traits. Production cycle was the longest for Carmem but lower and similar for Violeta, Isabel, Bordo and Concord. Isabel showed higher productivity (5.4 kg∙plant-1 but lowest soluble solids content (16.9 °Brix, anthocyanins (26.7 mg∙100 g-1 and total phenolics (110.7 mg∙100 g-1. The highest anthocyanins contents were observed in Violeta (189.9 mg∙100 g-1 and Bordo (133.8 mg∙100 g-1. These cultivars were also rich in phenolics (356.1 and 239.5 mg∙100 g-1, respectively. The highest anthocyanin and total phenolics concentrations were found in Violeta juice (2.68 and 6.33 g∙L-1 followed by Bordo (1.44 and 2.86 g∙L-1. Isabel juice had the lowest content, 0.14 and 1.29 g∙L-1, respectively. Biogenic amines were found at low concentrations only in the juices. Putrescine and spermidine were the major amines detected in juices. Phenylethylamine was detected only in Bordo juice from 2013 season and tryptamine was detected only in 2014 season. Blends were preferred over varietal juices except for Carmem.

  15. 78 FR 46610 - Lemon Juice From Argentina and Mexico

    Science.gov (United States)

    2013-08-01

    ... Argentina and Mexico Determination On the basis of the record \\1\\ developed in the subject five-year reviews... determines that termination of the suspended antidumping duty investigation on lemon juice from Mexico would...), entitled Lemon Juice from Argentina and Mexico: Investigation Nos. 731-TA-1105-1106 (Review). By order of...

  16. 78 FR 47006 - Lemon Juice From Argentina and Mexico

    Science.gov (United States)

    2013-08-02

    ... Argentina and Mexico Determination On the basis of the record \\1\\ developed in the subject five-year reviews... determines that termination of the suspended antidumping duty investigation on lemon juice from Mexico would...), entitled Lemon Juice from Argentina and Mexico: Investigation Nos. 731-TA-1105-1106 (Review). By order of...

  17. Storage test on apple juice after ultrasound treatment

    Directory of Open Access Journals (Sweden)

    Filomena Montemurro

    2014-03-01

    Full Text Available Apple juice, for its sensory and nutritional qualities, is consumed by people of all ages. Apples are an excellent source of several phenolic compounds and the presence of polyphenols is recognized for their health promoting antioxidant properties. Thermal pasteurization of fruit juices is the conventional method used for their preservation. Therefore, this constitutes the most extensively available methods for the inactivation of microorganisms in fruit juices but it causes side effects on their flavour and nutritional quality. Consumers tend to prefer recently extracted juices with fresh taste and minimal flavor or vitamin losses. To meet consumers’ demand, among the novel technologies that involve non-thermal processes, power ultrasound have been investigated as an alternative to conventional heat treatments. Objective of this study was to evaluate the effectiveness of the use of ultrasound in an attempt to maintain the organoleptic characteristics typical of a natural apple juice. In particular, it was evaluated the action on the microflora residing and shelf life of the product through microbiological and sensory analyses. Juice treated with ultrasound highlighted a reduction of aerobic mesophilic counts and psychrophilic bacteria respectively about 3 and 5 log CFU/mL and an enhanced yeast growth. The general opinion expressed by the panelist was in favour of the sonicated juice. This preliminary study showed that non-thermal methods such as power ultrasound technology may give new opportunities to develop fresh-like apple juice.

  18. Sugar cane juice as a retarding admixture in concrete production ...

    African Journals Online (AJOL)

    Sugar cane juice (SCJ) was investigated as a retarding agent in concrete production. Slump values and compressive strength of concrete with partial replacement of water by sugar cane juice was also investigated. The concrete cubes were prepared by replacing water with SCJ in the following proportions 0, 3, 5, 10 and ...

  19. 27 CFR 24.241 - Decolorizing juice or wine.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Decolorizing juice or wine..., DEPARTMENT OF THE TREASURY LIQUORS WINE Storage, Treatment and Finishing of Wine § 24.241 Decolorizing juice or wine. (a) Conditions and limitations. If the proprietor wishes to use activated carbon or other...

  20. Cultivo sem solo do morangueiro Strawberry soilless cultivation

    Directory of Open Access Journals (Sweden)

    Gustavo Giménez

    2008-02-01

    Full Text Available O morangueiro é uma cultura importante em vários países, principalmente nos Estados Unidos e na Europa, por suas características sensoriais, propriedades nutritivas e por sua rentabilidade. O cultivo comercial sem solo de morangueiro está bem desenvolvido na Europa, onde tem permitido um aumento da produtividade e qualidade da produção assim como a ampliação da oferta do produto ao longo do ano. Predomina o sistema aberto, em sacolas ou vasos com diferentes tipos de substratos, utilizando-se densidades de 8 a 12plantas m-2. As produtividades obtidas estão entre 5 e 10kg m-2. Para isolar as plantas do solo e facilitar o manejo da cultura, os vasos ou sacolas são suspensos a uma altura entre 0,8 e 1m da superfície do solo. A composição da solução nutritiva é variável, refletindo as diferentes condições produtivas. As mudas são produzidas principalmente em bandejas com substrato, a partir de pontas de estolões obtidas da multiplicação de plantas matrizes provenientes da propagação in vitro. No Brasil, o cultivo sem solo de morangueiro é ainda incipiente e os resultados produtivos e econômicos têm sido insatisfatórios, principalmente por falta de informações de pesquisas capazes de indicar sistemas apropriados de cultivo para as condições locais. É necessário desenvolver sistemas sustentáveis, preferencialmente fechados, combinando alta produtividade e elevada eficiência de utilização da água e dos nutrientes. No presente trabalho, são revisados os principais aspectos da produção em sistemas de cultivo sem solo de mudas e fruta de morangueiro. São descritos a produção de mudas, os sistemas e as soluções nutritivas empregadas em diferentes países. Ao final, são feitas inferências sobre a possibilidade de adoção e geração do sistema de cultivo sem solo apropriado para as condições brasileiras.Strawberry is a very important crop in Europe and USA due to its nutritional and sensorial

  1. Pollinator communities in strawberry crops - variation at multiple spatial scales.

    Science.gov (United States)

    Ahrenfeldt, E J; Klatt, B K; Arildsen, J; Trandem, N; Andersson, G K S; Tscharntke, T; Smith, H G; Sigsgaard, L

    2015-08-01

    Predicting potential pollination services of wild bees in crops requires knowledge of their spatial distribution within fields. Field margins can serve as nesting and foraging habitats for wild bees and can be a source of pollinators. Regional differences in pollinator community composition may affect this spill-over of bees. We studied how regional and local differences affect the spatial distribution of wild bee species richness, activity-density and body size in crop fields. We sampled bees both from the field centre and at two different types of semi-natural field margins, grass strips and hedges, in 12 strawberry fields. The fields were distributed over four regions in Northern Europe, representing an almost 1100 km long north-south gradient. Even over this gradient, daytime temperatures during sampling did not differ significantly between regions and did therefore probably not impact bee activity. Bee species richness was higher in field margins compared with field centres independent of field size. However, there was no difference between centre and margin in body-size or activity-density. In contrast, bee activity-density increased towards the southern regions, whereas the mean body size increased towards the north. In conclusion, our study revealed a general pattern across European regions of bee diversity, but not activity-density, declining towards the field interior which suggests that the benefits of functional diversity of pollinators may be difficult to achieve through spill-over effects from margins to crop. We also identified dissimilar regional patterns in bee diversity and activity-density, which should be taken into account in conservation management.

  2. [Modeling of lactic acid fermentation of leguminous plant juices].

    Science.gov (United States)

    Shurkhno, R A; Validov, Sh Z; Boronin, A M; Naumova, R P

    2006-01-01

    Lactic acid fermentation of leguminous plant juices was modeled to provide a comparative efficiency assessment of the previously selected strains of lactic acid bacteria as potential components of starter cultures. Juices of the legumes fodder galega, red clover, and alfalfa were subjected to lactic acid fermentation in 27 variants of experiment. Local strains (Lactobacillus sp. RS 2, Lactobacillus sp. RS 3, and Lactobacillus sp. RS 4) and the collection strain Lactobacillus plantarum BS 933 appeared the most efficient (with reference to the rate and degree of acidogenesis, ratio of lactic and acetic acids, and dynamics of microflora) in fermenting fodder galega juice; Lactobacillus sp. RS 1, Lactobacillus sp. RS 2, Lactobacillus sp. RS 3, Lactobacillus sp. RS 4, and L. plantarum BS 933 were the most efficient for red clover juice. Correction of alfalfa juice fermentation using the tested lactic acid bacterial strains appeared inefficient, which is explainable by its increased protein content and a low level of the acids produced during fermentation.

  3. Sterol Profile for Natural Juices Authentification by GC-MS

    Science.gov (United States)

    Culea, M.

    2007-04-01

    A GC-MS analytical method is described for some natural juices analysis. The fingerprint of sterols was used to characterize the natural juice. A rapid liquid-liquid extraction method was used. The sterols were separated on a Rtx-5MS capillary column, 15m×0.25mm, 0.25μm film thickness, in a temperature program from 50°C for 1 min, then ramped at 15°C/min to 300°C and held for 15 min. Identification of sterols and their patterns were used for juice characterization. The sterol profile is a useful approach for confirming the presence of juices of orange, grapefruit, pineapple and passion fruit in compounded beverages and for detecting of adulteration of fruit juices.

  4. Sterol Profile for Natural Juices Authentification by GC-MS

    International Nuclear Information System (INIS)

    Culea, M.

    2007-01-01

    A GC-MS analytical method is described for some natural juices analysis. The fingerprint of sterols was used to characterize the natural juice. A rapid liquid-liquid extraction method was used. The sterols were separated on a Rtx-5MS capillary column, 15mx0.25mm, 0.25μm film thickness, in a temperature program from 50 deg. C for 1 min, then ramped at 15 deg. C/min to 300 deg. C and held for 15 min. Identification of sterols and their patterns were used for juice characterization. The sterol profile is a useful approach for confirming the presence of juices of orange, grapefruit, pineapple and passion fruit in compounded beverages and for detecting of adulteration of fruit juices

  5. Colour, phenolic content and antioxidant activity of grape juice

    Directory of Open Access Journals (Sweden)

    Vívian Maria Burin

    2010-12-01

    Full Text Available Viticultural practices in the State of Santa Catarina, Brazil, have shown economic growth, with the production of grapes used to produce wines and grape juice. Grapes are rich in phenolic compounds which have drawn attention not only because of their important role in the development of products derived from grapes, but also for their potential beneficial health effects. The objective of this study was to evaluate commercial, organic and homemade grape juices produced in Santa Catarina. Grape juices were analyzed for total phenolic content, colour, and antioxidant activity. The commercial juices had the highest average values for total monomeric anthocyanins and total phenolics. There was a strong positive correlation (R = 0.9566 between the antioxidant activity and total phenolic content for the commercial juice. In addition, the Principle Components Analysis showed a strong positive correlation between the red colour and total monomeric anthocyanins. However, the total monomeric anthocyanis and polymeric anthocyanins showed a negative correlation.

  6. Propiedades Fisicoquímicas de Fresas (Fragaria sp Cultivadas Bajo Filtros Fotoselectivos Physical and Chemical Properties of Strawberries (Fragaria sp Grown Under Photoselective Filters

    Directory of Open Access Journals (Sweden)

    Fánor Casierra-Posada

    2011-12-01

    Full Text Available Se realizó un experimento para examinar los efectos de la calidad de luz sobre la calidad de la fruta en fresa (Fragaria sp cv. Chandler, establecida en invernadero. Se probaron cinco filtros de polipropileno de colores diferentes (rojo, amarillo, azul, verde, y transparente, con plantas sin cobertura como control. En los frutos se determinó el peso fresco y seco, longitud y ancho, sólidos solubles totales (SST, pH, acidez titulable (AT e índice de madurez (IM. Todas las variables evaluadas fueron afectadas significativamente por los filtros espectrales, con excepción del pH del jugo. El crecimiento del fruto fue fuertemente influenciado por la cobertura verde. Bajo la cobertura amarilla las plantas incrementaron el peso fresco de los frutos y el IM. La cobertura azul redujo el contenido de SST en los frutos, así como el IM. La longitud y ancho de los frutos aumentaron con la cobertura roja. La cobertura transparente incrementó los SST y la AT. Para ciertas variables los resultados no fueron suficientemente concluyentes como para proponer este nuevo sistema de producción en el cultivo de fresa en los altiplanos tropicales; sin embargo, sería importante evaluar esta técnica de producción en regiones con mayor iluminación que la región donde se desarrolló este estudio.An experiment was carried out to examine the effects of light quality on the fruit quality in strawberry (Fragaria sp cv. Chandler established in glasshouse. Five different colored polypropylene filters (red, blue, yellow, green and clear were tested, with plants growing without cover as control. Fresh and dry weight, length and width, total soluble solids (TSS, pH, titratable acidity (TA and maturity index (MI, were measured on fruits. All evaluated variables were significantly affected by the spectral filters, except the pH of the juice. The fruit growth was strongly reduced by green cover. Under the yellow cover plants enhanced the fresh weight of fruits and the MI

  7. Pasta Fortified with Potato Juice: Structure, Quality, and Consumer Acceptance.

    Science.gov (United States)

    Kowalczewski, Przemysław; Lewandowicz, Grażyna; Makowska, Agnieszka; Knoll, Ismena; Błaszczak, Wioletta; Białas, Wojciech; Kubiak, Piotr

    2015-06-01

    The potential of potato juice in relieving gastrointestinal disorders has already been proven. Work continues on implementation of this active component into products that are widely consumed. In this article, results of an attempt to fortify pasta with potato juice are presented and discussed. Fortification is performed using fresh and dried juice. The influence of the addition on culinary properties of the final product, such as cooking weight and cooking loss, as well as microstructure, color, texture, and consumer acceptance were evaluated. It was found that potato juice can be used for fortification of pasta both in its fresh and dried forms, however the effects on different responses depend on the potato juice form used. The addition of potato juice influenced the color of the product reducing its lightness and shifting color balances from green to red, yellow color saturation was decreased as well. Changes in color were more significant in the case of fresh juice addition. The firmness and microstructure of pasta was also influenced. The surface microstructure of pasta containing fresh potato juice was different from that of the other 2 products being a likely explanation of the lower cooking loss observed in its case. In contrast, the consistency of dough was strengthened by addition of dried potato juice. Principal components analysis indicated that the color change had the most pronounced effect on consumer acceptance. Other physicochemical changes were slightly less significant. Nevertheless, sensory evaluation proved that functional pasta produced with fresh potato juice finds consumer acceptance comparable with that of classic pasta. © 2015 Institute of Food Technologists®

  8. Lights and shadows of the red gold. An integrated assessment of Spanish strawberry production and its impacts.

    Science.gov (United States)

    Madrid-Lopez, Cristina

    2014-05-01

    Spanish strawberries are an export success. Spain is the second largest producer of this fruit and it has been the world's leading strawberry exporter for years. In 2012, strawberry exports were approximately 95% of total strawberry production in Spain. The production of the red gold is concentrated in around 7000 hectares of intensive farming in the province of Huelva (south west Spain). At least 85% of all Spanish strawberries are produced in this region, in an area close to the UNESCO World Heritage Site Doñana National Park. The case of the strawberry production in Huelva makes an interesting case study for the integrated analysis of the water-food-land-political economy nexus. Its combination of bio-physical and socio-economic characteristics (local climatic conditions, agricultural techniques, environmental issues, food value chains, trade networks and socio-economic factors) are quite particular and form a case where social and natural issues coevolve. Supporters of the activity argue a high contribution to local GDP and job market and its strategic position in international markets. Critics maintain that this industry creates social and environmental conflicts. The strawberry from Huelva supplies early season strawberries to the richer markets of Germany and France and at the same time seems to fail in alleviating a provincial unemployment rate of 34%. The viability of the system is in danger: production costs are 70% higher than 20 years ago while the price per kilo has not changed or even decreased. In environmental terms, the strawberries of Huelva are irrigated with ground water withdrawn from aquifers that feed the water streams of the natural park. Half of the wells that extract the water are not legally registered for what the total amount of water withdrawal remains unknown. Should we promote the continuity of this activity? In this work, I perform a Multi-Scale Integrated Assessment of Societal and Ecosystem Metabolism (MuSIASEM) of Water for the

  9. Juice clarification by protease and pectinase treatments indicates new roles of pectin and protein in cherry juice turbidity

    DEFF Research Database (Denmark)

    Meyer, Anne S.; Zeuner, Birgitte; Pinelo-Jiménez, Manuel

    2010-01-01

    during cold storage (haze formation) is assumed to be due to protein–phenol interactions. Our results suggest that proteins play a decisive role in the formation of immediate turbidity in cherry juice, and point to that pectin may contribute to turbidity development during cold storage of cherry juice...

  10. Heat treatment and gamma radiation effects on the physical-chemical, microbiological and sensory stability of pure sugarcane juice or added with fruit juices, stored under refrigeration

    International Nuclear Information System (INIS)

    Oliveira, Aline Cristine Garcia de

    2007-01-01

    Sugarcane juice is a taste drink, energetic, no alcoholic that conserves all the nutrients in cane sugar. It was very appreciated by the Brazilian population and its production has been shown to be a highly lucrative business. This research had the following objectives: evaluate the acceptance of the consuming market and the stability of pure sugarcane juice or added with natural fruit juices, submitted of heat treatment (70 deg C/ 25 min) and/ or gamma radiation (2,5 kGy) and stored in high density polyethylene bottles, under refrigeration (5 +- 1 deg C). Sugarcane juice market test was evaluated through the application of 350 questionnaires on six Sao Paulo cities. Sugarcane juice stability was evaluated through microbiological (psychotropic count, lactic bacteria and yeasts and molds count), physical-chemical (pH, color, titratable acidity, soluble solids, ratio and polyphenoloxidase activity) and sensory (hedonic test) parameters. Centesimal composition was determined analyzing: humidity, caloric value, total carbohydrates, total and reducing sugars, lipids, proteins, ascorbic acid, ash and minerals. Sugarcane juice shelf life period was determinate ever 7 days over a period of 42 days stored under refrigeration. The data were submitted to the variance analysis and compared by Tukey's test (p<0,05). Among the 350 interviewed people, more of the half one is interested about its habitual food safe and care about street foods. Sandwiches had been cited foods as routinely consumed, followed for the sugarcane juice and 'pastel'. Among the interviewed ones, 80% had mentioned to appreciate sugarcane juice. It had not correlation between age and school age and the preference for the consumption form was with lemon juice addition. About 55% of the interviewed ones had mentioned that would more frequently consume sugarcane juice processed and packed. Sugarcane juice processing did not modify the flavor and taste of the drink. It was concluded from the sensory analyses

  11. Agrobacterium-mediated transformation of modified antifreeze protein gene in strawberry

    Directory of Open Access Journals (Sweden)

    Srisulak Dheeranupattana

    2005-07-01

    Full Text Available The optimum condition for shoot regeneration from leaf explants of strawberry cultivar Tiogar was investigated. It was found that the best regeneration condition was MS medium containing N6-Benzyladenine (BA and 2,4-Dichlorophenoxy acetic acid (2,4-D at concentrations of 1 mg.l-1 and 0.2 mg.l-1, respectively. Antibiotics sensitivity test found that shoot regeneration from leaf explant was inhibited more than 90% at the concentration of kanamycin (Km as low as 5 mg.l-1. The modified gene encoding antifreeze protein isoform HPLC 6 was successfully constructed using codons which were optimally expressed in the strawberry plant. The antifreeze protein genes, naturally in plasmid pSW1 and modified in plasmid BB, were transformed to strawberry leaf explants by Agrobacterium tumefaciens LBA 4404. The strawberry plants, transformed with both AFP genes, were able to root in MS media containing 50 mg.l-1 Km, while no roots grew from nontransformed plant in this condition. Polymerase chain reaction indicated that the transgenes were integrated in the genome of transformants.

  12. Inactivation of E.coli 0157:H7 and Salmonella enterica on strawberries by sanitizing solutions

    Science.gov (United States)

    A recent foodborne outbreak of E. coli O157:H7 in Oregon associated with the consumption of fresh strawberries highlights the need for effective sanitizing washes, suitable for the inactivation of pathogens on fresh produce. Sanitizing solutions were screened for decontaminating E. coli O157:H7 (E...

  13. Greenhouse and Field Evaluation of the Natural Saponin CAY-1, for Control of Several Strawberry Diseases

    Science.gov (United States)

    The steroidal saponin from cayenne pepper, CAY-1, was tested as a potential fungicide in detached leaf assays and field trials. Efficacy of CAY-1 against strawberry anthracnose was compared to the commercial fungicide azoxystrobin. Both fungicides prevented anthracnose leaf lesions when applied to...

  14. Defence activation in strawberry and pine- Epigenetic changes in treated plants

    OpenAIRE

    Komajda, Ludwika

    2016-01-01

    Strawberry plants (Fragaria x ananassa) and Scots pine (Pinus sylvestris) represent species, withinagriculture and forestry respectively, that are traditionally protected by utilization of pesticidesincluding neurotoxic insecticides. More environmentally friendly protection strategies are thereforehighly desirable. Treating plants with specific metabolites naturally occurring in their tissues might alterepigenetic mechanisms, which in turn may strengthen plants self-defense against diseases a...

  15. Evaluation of Sanitizing Methods for Reducing Microbial Contamination on Fresh Strawberry, Cherry Tomato, and Red Bayberry

    Directory of Open Access Journals (Sweden)

    Wei Wei

    2017-12-01

    Full Text Available Strawberries, cherry tomatoes, and red bayberries, which are the most popular types of fresh produce in China, are vulnerable to microbial contamination. In this study, different sanitizing methods [treatment with 2% organic acids, 0.02% sodium hypochlorite (SH, 0.1% sodium chlorite (SC, and 0.1% acidified sodium chlorite (ASC] were applied to fresh strawberry, cherry tomato, and red bayberry, and their abilities to reduce aerobic bacteria, Escherichia coli O157:H7, mold, yeast, and Salmonella Typhimurium were evaluated. The commercially used SH method reduced the background microbiota on strawberry, cherry tomato, and red bayberry by 0.20–2.07 log cfu/g. The ASC method reduced background microbiota (except for mold on strawberry and cherry tomato by more than 3.0 log cfu/g. ASC was the only sanitizer that significantly reduced mold on red bayberry, and lactic acid was the only organic acid sanitizer that effectively reduced yeast on red bayberry. The ASC method had the best sterilizing effect on the three fresh fruits and also required the shortest sanitizing time and low chlorite content. The application of ASC method significantly reduced the microbiota on retail grocery samples, and the effect was similar to that achieved by sanitizing methods comparison.

  16. Strawberry Achenes Are an Important Source of Bioactive Compounds for Human Health

    Directory of Open Access Journals (Sweden)

    María Teresa Ariza

    2016-07-01

    Full Text Available Strawberries are highly appreciated for their taste, nutritional value and antioxidant compounds, mainly phenolics. Fruit antioxidants derive from achenes and flesh, but achene contribution to the total fruit antioxidant capacity and to the bioaccessibility after intake is still unknown. In this work, the content of total phenolic compounds, flavonoids, anthocyanins and antioxidant capacity (TEAC, FRAP and DPPH of achenes and flesh were compared in non-digested as well as in gastric and intestinal extracts after in vitro digestion. Results showed that, despite strawberry achenes represent a small fraction of the fruit, their contribution to total fruit antioxidant content was more than 41% and accounted for 81% of antioxidant capacity (TEAC. Achenes have higher quantity and different quality of antioxidants in non-digested and digested extracts. Antioxidant release was higher in the in vitro gastric digested extracts, but digestion conditions did not only affect quantity but quality, resulting in differences in antioxidant capacity and highlighting the importance of simulating physiological-like extraction conditions for assessing fruit antioxidant properties on human health. These results give new insights into the use of strawberry achenes as a source of bioactive compounds to be considered in strawberry breeding programs for improving human health.

  17. Whole genome sequences of the raspberry and strawberry pathogens Phytophthora rubi and P. fragariae

    Science.gov (United States)

    Phytophthora rubi and P. fragariae are two closely related oomycete plant pathogens that exhibit strong morphological and physiological similarities, but are specialized to infect different hosts of economic importance, namely raspberry and strawberry. Here, we report the draft genome sequences of t...

  18. CZE separation of strawberry anthocyanins with acidic buffer and comparison with HPLC.

    Science.gov (United States)

    Comandini, Patrizia; Blanda, Giampaolo; Cardinali, Andrea; Cerretani, Lorenzo; Bendini, Alessandra; Caboni, Maria Fiorenza

    2008-10-01

    Anthocyanins, the major colourants of strawberries, are polar pigments that are positively charged at low pH. Herein, we have assessed a new analytical method for the separation of anthocyanins using CZE. Acidic buffer solutions (pH pigments in the cation flavylium form and achieve high molar absorptivity at 510 nm. These spectral properties enabled us to identify strawberry anthocyanins in a preliminary stage by detection in the visible range, although the method was optimised at 280 nm to obtain the best S/N. The effects of buffer composition highlighted the necessity of adding an organic modifier to the running buffer to obtain a suitable separation. The electrophoretic method permitted the separation of the three main anthocyanins of strawberry extracts, namely pelargonidin 3-glucoside (Pg-glu), pelargonidin 3-rutinoside and cyanidin 3-glucoside. The electrophoretic results, expressed as retention time and separation efficiency of the major anthocyanin (Pg-glu), were compared to those achieved in HPLC, the analytical technique traditionally used for the investigation of anthocyanins in vegetable matrix. The content of Pg-glu in strawberries (cv. Camarosa), calculated with HPCE and HPLC methods, resulted respectively in 11.41 mg/L and 11.37 mg/L.

  19. Molecular characterization of a stable antisense chalcone synthase phenotype in strawberry (Fragaria ananassa)

    NARCIS (Netherlands)

    Lunkenbein, S.; Coiner, H.; Vos, de C.H.; Schaart, J.G.; Boone, M.J.; Krens, F.A.; Schwab, W.; Salentijn, E.M.J.

    2006-01-01

    An octaploid (Fragaria × ananassa cv. Calypso) genotype of strawberry was transformed with an antisense chalcone synthase (CHS) gene construct using a ripening related CHS cDNA from Fragaria × ananassa cv. Elsanta under the control of the constitutive CaMV 35S promoter via Agrobacterium tumefaciens.

  20. Heat shock and salicylic acid on postharvest preservation of organic strawberries

    Directory of Open Access Journals (Sweden)

    Sidiane Coltro

    2014-06-01

    Full Text Available Heat shock and salicylic acid have been studied on shelf-life extension of fruits. The benefits of these techniques have been related to their effect on inducing physiological defense responses against the oxidative stress and pathogen development. The objective of this study was to evaluate the effect of heat shock and salicylic acid on the postharvest preservation and contents of total phenolics, anthocyanins, ascorbic acid, fresh weight loss and microbiological quality of organic strawberries cv. Dover. Strawberries produced organically and stored at 5 ºC were subjected to heat shock (45 ºC ± 3 ºC for 3 h, application of salicylic acid (soaking in 2.0 mmol L-1 solution, heat shock in combination with salicylic acid and control. After treatment, the fruits were packed and stored in a climatic chamber at 5 ºC ± 2 ºC. At 1, 7 and 14 days, the experimental units were removed from refrigeration and kept at room temperature of approximately 20 ºC for two days. There was no effect of treatments on fresh weight loss, incidence of pathogens or chemical variations in strawberry fruits during the storage period. In natural conditions, organically grown strawberries remained in good condition for sale up to seven days of storage in all treatments.

  1. Screening strawberry plants for anthracnose disease resistance using traditional and molecular techniques

    Science.gov (United States)

    Anthracnose is one of the most destructive diseases of strawberry which may cause fruit rot, leaf and petiole lesions, crown rot, wilt, and death. Crop loss due to anthracnose diseases can reach into the millions of dollars. Three species of Colletotrichum are considered causative agents of anthr...

  2. Genomics tools available for unravelling mechanisms underlying agronomical traits in strawberry with more to come

    Science.gov (United States)

    In the last few years, high-throughput genomics promised to bridge the gap between plant physiology and plant sciences. In addition, high-throughput genotyping technologies facilitate marker-based selection for better performing genotypes. In strawberry, Fragaria vesca was the first reference sequen...

  3. Pollinator communities in strawberry crops – variation at multiple spatial scales

    DEFF Research Database (Denmark)

    Ahrenfeldt, Erica Juel; Klatt, B.K.; Arildsen, Julie

    2015-01-01

    and hedges, in 12 strawberry fields. The fields were distributed over four regions in Northern Europe, representing an almost 1100 km long north-south gradient. Even over this gradient, daytime temperatures during sampling did not differ significantly between regions and did therefore probably not impact bee...

  4. Influence of growing conditions at different latitudes of Europe on strawberry growth performance, yield and quality

    DEFF Research Database (Denmark)

    Krüger, E.; Josuttis, M.; Nestby, R.

    2012-01-01

    The site effect of five locations from north (Stjørdal, Norway, 63°36'N) to south (Ancona, Italy, 43°31'N) was evaluated in strawberry regarding yield performance, fruit quality, length of fruit developing time from anthesis to harvest start and length of the harvest season. Cv. Elsanta was grown...

  5. Agricultural Change and the Rise of the British Strawberry Industry, 1920-2009

    Science.gov (United States)

    Calleja, E. J.; Ilbery, B.; Mills, P. R.

    2012-01-01

    Little research has been conducted on structural change within the UK horticultural sector. This paper examines long-term changes, over a 90-year period, in one particular part of the UK horticultural sector: strawberries. It follows its growth from being a minor crop in 1920 to becoming the biggest grossing horticultural crop in 2009. Using a…

  6. Influence of gamma-irradiation on the total volatile acids content in strawberries

    International Nuclear Information System (INIS)

    Curzio, O.A.; Piccini, J.L.; Quaranta, H.O.; Perez, S.

    1983-01-01

    The aim of this work was to determine if there exist some kind of correlation between the evolution of the organoleptic characteristics of control and irradiated strawberry and the measured volatile acids content. Affirmative results would suggest that the V.A. content really corresponds to a quality index of the fruit. (orig./AJ)

  7. A comparison of bioactive compounds of strawberry fruit from Europe affected by genotype and latitude

    DEFF Research Database (Denmark)

    Josuttis, M.; Carlen, C.; Nestby, R.

    2012-01-01

    The effect of four different growing locations from Stjørdal, Norway (63°36'N) to Conthey, Switzerland (46°12'N) on the composition of bioactives in strawberry (Fragaria × ananassa Duch.) of three genotypes (cvs Clery, Elsanta and Korona) was evaluated. Principal component analysis (PCA) was used...

  8. Impact of climate change on the timing of strawberry phenological processes in the Baltic States

    Directory of Open Access Journals (Sweden)

    Līga Bethere

    2016-02-01

    Full Text Available Climate change has been shown to impact aspects of agriculture and phenology. This study aims to quantify changes in the timing of garden strawberry blooms and harvests in the Baltic States using Regional Climate Models (RCMs. First, parameters for a strawberry phenology model based on the growing degree day (GDD methodology were determined. Growing degree days were calculated using a modified sine wave method that estimates the diurnal temperature cycle from the daily maximum and minimum temperature. Model parameters include the base temperature and the required cumulative GDD sum, estimated from phenological and meteorological observations in Latvia for the years 2010–2013 via iterative calibration. Then an ensemble of bias-corrected RCM results (ENSEMBLES project was used as input to the phenological model to estimate the timing of strawberry phenological processes for the years 1951–2099. The results clearly show that strawberry phenological processes can be expected to occur earlier in the future, with a significant change in regional patterns. Differences between coastal and inland regions are expected to decrease over time. The uncertainty of the results was estimated using the RCM ensemble spread, with northern coastal locations showing the largest spread.

  9. CATT: a New and Non-Chemical Pest and Nematode Control Method in Strawberry Planting Stock

    NARCIS (Netherlands)

    Kruistum, van G.; Evenhuis, B.; Hoek, J.; Kastelein, P.; Wolf, van der J.M.; Verschoor, J.A.

    2014-01-01

    As an alternative to MeBr fumigation a 48h Controlled Atmosphere Temperature Treatment (CATT) was developed and scaled up by Wageningen UR in cooperation with the Dutch plant propagating association Plantum. This results in an excellent de-infestation and 99.8 % mortality of the strawberry

  10. CATT as a sustainable method for disinfestation of strawberry mother planting stock

    NARCIS (Netherlands)

    Kruistum, van G.; Hoek, H.; Verschoor, J.; Molendijk, L.P.G.

    2014-01-01

    From 2009 Controlled Atmosphere Temperature Treatment (CATT) is scaled up to a commercial level and widely applied by Dutch producers of strawberry (Fragaria × ananassa) mother planting stock. CATT is a non-chemical and sustainable method to disinfest plant material from insect pests. Frigo plants

  11. Dynamics of predation on Lygus hesperus (Hemiptera: Miridae) in alfalfa trap cropped organic strawberry

    Science.gov (United States)

    Alfalfa (Medicago sativa L.) can be strategically planted as a trap crop for Lygus spp. in California’s organic strawberry fields. Alfalfa has been shown to attract both Lygus spp. and, in turn, a Lygus-specific parasitoid, Peristenus relictus (Ruthe). However, the impact of alfalfa trap-cropped st...

  12. Validation of a pulsed electric field process to pasteurize strawberry puree

    Science.gov (United States)

    An inexpensive data acquisition method was developed to validate the exact number and shape of the pulses applied during pulsed electric fields (PEF) processing. The novel validation method was evaluated in conjunction with developing a pasteurization PEF process for strawberry puree. Both buffered...

  13. Control of postharvest Botrytis fruit rot of strawberry by volatile organic compounds of Candida intermedia.

    Science.gov (United States)

    Huang, R; Li, G Q; Zhang, J; Yang, L; Che, H J; Jiang, D H; Huang, H C

    2011-07-01

    A study was conducted to identify volatile organic compounds or volatiles produced by Candida intermedia strain C410 using gas chromatography-mass spectrometry, and to determine efficacy of the volatiles of C. intermedia in suppression of conidial germination and mycelial growth of Botrytis cinerea and control of Botrytis fruit rot of strawberry. Results showed that, among 49 volatiles (esters, alcohols, alkenes, alkanes, alkynes, organic acids, ketones, and aldehydes) identified from C. intermedia cultures on yeast extract peptone dextrose agar, two compounds, 1,3,5,7-cyclooctatetraene and 3-methyl-1-butanol, were the most abundant. Synthetic chemicals of 1,3,5,7-cyclooctatetraene; 3-methyl-1-butanol; 2-nonanone; pentanoic acid, 4-methyl-, ethyl ester; 3-methyl-1-butanol, acetate; acetic acid, pentyl ester; and hexanoic acid, ethyl ester were highly inhibitory to conidial germination and mycelial growth of B. cinerea. Inhibition of conidial germination and mycelial growth of B. cinerea by volatiles of C. intermedia was also observed. Meanwhile, results showed that incidence and severity of Botrytis fruit rot of strawberry was significantly (P intermedia cultures or C. intermedia-infested strawberry fruit. These results suggest that the volatiles of C. intermedia C410 are promising biofumigants for control of Botrytis fruit rot of strawberry.

  14. Effect of spray application technique on spray deposition in greenhouse strawberries and tomatoes.

    Science.gov (United States)

    Braekman, Pascal; Foque, Dieter; Messens, Winy; Van Labeke, Marie-Christine; Pieters, Jan G; Nuyttens, David

    2010-02-01

    Increasingly, Flemish greenhouse growers are using spray booms instead of spray guns to apply plant protection products. Although the advantages of spray booms are well known, growers still have many questions concerning nozzle choice and settings. Spray deposition using a vertical spray boom in tomatoes and strawberries was compared with reference spray equipment. Five different settings of nozzle type, size and pressure were tested with the spray boom. In general, the standard vertical spray boom performed better than the reference spray equipment in strawberries (spray gun) and in tomatoes (air-assisted sprayer). Nozzle type and settings significantly affected spray deposition and crop penetration. Highest overall deposits in strawberries were achieved using air-inclusion or extended-range nozzles. In tomatoes, the extended-range nozzles and the twin air-inclusion nozzles performed best. Using smaller-size extended-range nozzles above the recommended pressure range resulted in lower deposits, especially inside the crop canopy. The use of a vertical spray boom is a promising technique for applying plant protection products in a safe and efficient way in tomatoes and strawberries, and nozzle choice and setting should be carefully considered.

  15. An R2R3-MYB Transcription Factor Regulates Eugenol Production in Ripe Strawberry Fruit Receptacles

    NARCIS (Netherlands)

    Medina-Puche, L.; Molina-Hidalgo, F.J.; Boersma, M.; Schuurink, R.C.; López-Vidriero, I.; Solano, R.; Franco-Zorrilla, J.M.; Caballero, J.L.; Blanco-Portales, R.; Muñoz-Blanco, J.

    2015-01-01

    Eugenol is a volatile phenylpropanoid that contributes to flower and ripe fruit scent. In ripe strawberry (Fragaria x ananassa) fruit receptacles, eugenol is biosynthesized by eugenol synthase (FaEGS2). However, the transcriptional regulation of this process is still unknown. We have identified and

  16. Strawberry Achenes Are an Important Source of Bioactive Compounds for Human Health

    Science.gov (United States)

    Ariza, María Teresa; Reboredo-Rodríguez, Patricia; Mazzoni, Luca; Forbes-Hernández, Tamara Yuliett; Giampieri, Francesca; Afrin, Sadia; Gasparrini, Massimiliano; Soria, Carmen; Martínez-Ferri, Elsa; Battino, Maurizio; Mezzetti, Bruno

    2016-01-01

    Strawberries are highly appreciated for their taste, nutritional value and antioxidant compounds, mainly phenolics. Fruit antioxidants derive from achenes and flesh, but achene contribution to the total fruit antioxidant capacity and to the bioaccessibility after intake is still unknown. In this work, the content of total phenolic compounds, flavonoids, anthocyanins and antioxidant capacity (TEAC, FRAP and DPPH) of achenes and flesh were compared in non-digested as well as in gastric and intestinal extracts after in vitro digestion. Results showed that, despite strawberry achenes represent a small fraction of the fruit, their contribution to total fruit antioxidant content was more than 41% and accounted for 81% of antioxidant capacity (TEAC). Achenes have higher quantity and different quality of antioxidants in non-digested and digested extracts. Antioxidant release was higher in the in vitro gastric digested extracts, but digestion conditions did not only affect quantity but quality, resulting in differences in antioxidant capacity and highlighting the importance of simulating physiological-like extraction conditions for assessing fruit antioxidant properties on human health. These results give new insights into the use of strawberry achenes as a source of bioactive compounds to be considered in strawberry breeding programs for improving human health. PMID:27409612

  17. Application of multispectral imaging to determine quality attributes and ripeness stage in strawberry fruit.

    Directory of Open Access Journals (Sweden)

    Changhong Liu

    Full Text Available Multispectral imaging with 19 wavelengths in the range of 405-970 nm has been evaluated for nondestructive determination of firmness, total soluble solids (TSS content and ripeness stage in strawberry fruit. Several analysis approaches, including partial least squares (PLS, support vector machine (SVM and back propagation neural network (BPNN, were applied to develop theoretical models for predicting the firmness and TSS of intact strawberry fruit. Compared with PLS and SVM, BPNN considerably improved the performance of multispectral imaging for predicting firmness and total soluble solids content with the correlation coefficient (r of 0.94 and 0.83, SEP of 0.375 and 0.573, and bias of 0.035 and 0.056, respectively. Subsequently, the ability of multispectral imaging technology to classify fruit based on ripeness stage was tested using SVM and principal component analysis-back propagation neural network (PCA-BPNN models. The higher classification accuracy of 100% was achieved using SVM model. Moreover, the results of all these models demonstrated that the VIS parts of the spectra were the main contributor to the determination of firmness, TSS content estimation and classification of ripeness stage in strawberry fruit. These results suggest that multispectral imaging, together with suitable analysis model, is a promising technology for rapid estimation of quality attributes and classification of ripeness stage in strawberry fruit.

  18. Managing conflict over biological control: the case of strawberry guava in Hawaii

    Science.gov (United States)

    Tracy Johnson

    2016-01-01

    Biological control researchers commonly avoid targets with potential for high conflict, but for certain highly damaging invaders with no viable management alternatives, it may be necessary to consider biological control even when it is likely to generate conflict. Discussed here is a case study, strawberry guava (Psidium cattleianum Sabine...

  19. An Efficient Agrobacterium-Mediated Transformation of Strawberry cv. Camarosa by a Dual Plasmid System

    Directory of Open Access Journals (Sweden)

    Fatemeh Haddadi

    2015-02-01

    Full Text Available An Agrobacterium-mediated transformation method was applied to introduce the luciferase reporter gene under the control of the CaMV35S promoter in the pGreen0049 binary vector into strawberry cv. Camarosa. The in vitro regeneration system of strawberry leaves to be used in the transformation was optimized using different TDZ concentrations in MS medium. TDZ at 16 µM showed the highest percentage (100% of shoot formation and the highest mean number of shoots (24 produced per explant. Studies on the effects of different antibiotics, namely timentin, cefotaxime, carbenicillin and ampicillin, on shoot regeneration of strawberry leaf explants showed the best shoot regeneration in the presence of 300 mg/L timentin and 150 mg/L cefotaxime. Assessment of the different factors affecting Agrobacterium mediated-transformation of strawberry with the luciferase gene showed the highest efficiency of putative transformant production (86% in the treatment with no preculture, bacterial OD600 of 0.6 and the addition of 150 mg/L cefotaxime in the pre-selection and selection media. The presence of the luciferase gene in the plant genome was verified by the luciferase reporter gene assay, nested PCR amplification and dot blot of genomic DNA isolated from the young leaves of each putatively transformed plantlet.

  20. Production of baker's yeast using date juice.

    Science.gov (United States)

    Beiroti, A; Hosseini, S N

    2007-07-01

    Baker's yeast is an important additive among the products which improves bread quality and for present time is being produced in different countries by batch, fed batch or continuous cultures. Saccharomyces cerevisiae is used in fermentation of starch in dough, giving a favourable taste and produces a variety of vitamins and proteins. The main ingredient in yeast production is carbon source such as beet molasses, cane molasses, and so on. Since beet molasses has other major function as in high yield alcohol production and also due to the bioenvironmental issues and related wastewater treatment, the use of other carbohydrate sources may be considered. One of these carbohydrate sources is date which is wasted a great deal annually in this country (Iran) . In this study, the capability of date to act as a suitable carbon sources was investigated. The waste date turned into juice and consequently production and growth rate of Sacchromyces cervisiae were studied with this juice. A maximum possible yield of 50% was obtained by the optimum medium (P3), at pH 3.4, 30 degrees C, 1.4 vvm aeration rate and agitation of 500 r/min.

  1. 6'7'-Dihydroxybergamottin contributes to the grapefruit juice effect.

    Science.gov (United States)

    Kakar, Shefali M; Paine, Mary F; Stewart, Paul W; Watkins, Paul B

    2004-06-01

    Our objective was to assess the contribution of 6',7'-dihydroxybergamottin (DHB) to the inhibitory effect of grapefruit juice toward intestinal cytochrome P450 (CYP) 3A4. An aqueous extract was prepared from grapefruit juice by centrifugation, filtration, and repeated washing of the particulate with water. The concentrations of various furanocoumarins in this grapefruit juice "serum" and in whole grapefruit juice were measured by HPLC and their identities confirmed by liquid chromatography-tandem mass spectrometry. Five healthy volunteers were given a single tablet of felodipine (10 mg) with whole grapefruit juice, orange juice-containing serum, or plain orange juice (control). The pharmacokinetic outcomes of felodipine were evaluated by noncompartmental methods. The effects of serum and purified DHB (at the same concentrations as those measured in the orange juice-containing serum used in the clinical study) were compared, in vitro, with regard to (1) the reversible and mechanism-based inhibition of the catalytic activity of complementary deoxyribonucleic acid-expressed CYP3A4 and (2) the time-dependent loss of immunoreactive CYP3A4 protein in modified Caco-2 cells. The concentration of DHB in serum was comparable to that measured in whole grapefruit juice (38 micromol/L versus 43 micromol/L), and the concentrations of other known furanocoumarins were well below the lowest published concentration required to inhibit catalytic activity by 50%. Relative to plain orange juice, orange juice-containing serum significantly increased the median felodipine area under the plasma concentration-time curve by 1.9-fold (P =.04) and increased the maximum concentration by 1.7-fold (P =.01). In vitro, serum and purified DHB had similar inhibitory effects toward CYP3A4 activity with respect to both reversible inhibition (95% confidence interval, 85% +/- 5.7% and 75% +/- 4.5%, respectively) and mechanism-based inhibition after a 15-minute preincubation (95% confidence interval, 79

  2. 21 CFR 146.148 - Reduced acid frozen concentrated orange juice.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Reduced acid frozen concentrated orange juice. 146... Canned Fruit Juices and Beverages § 146.148 Reduced acid frozen concentrated orange juice. (a) Reduced acid frozen concentrated orange juice is the food that complies with the requirements for composition...

  3. Effects of gamma radiation and packaging on conservation of toyonoka strawberries stored under refrigeration

    International Nuclear Information System (INIS)

    Domingues, Danielle Marinelli

    2000-01-01

    Strawberries have short post harvest life due to the rapid spoilage caused by fungal infections, even when stored under refrigeration. The effects of gamma radiation (0.0, 1.5, 2.0 and 2.5 kGy) and two kinds of packages (plastic boxes with or without PVC film wrapping) were evaluated using Toyonoka strawberries kept under refrigeration (3 to 6 deg C and relative humidity of 55%) for 1, 8, 15 and 22 days after irradiation, applied 1 day after harvesting. Deterioration progression and loss of weight occurred in the course of storage and although the content of ascorbic acid had also increased, total titratable acidity, p H and ratio remained constant during all the experimental period, independent of the samples treatments. The use of PVC film packing inhibited dehydration of the strawberries along the storage and also caused reduction in soluble solid content of the fruits stored for more than 8 days. The treatments with 2.0 and 2.5 kGy had caused significant losses of ascorbic acid the higher dose also significantly reduced the texture of the fruits. Sensorial analysis has been performed with 30 untrained judges to evaluate the acceptability of strawberries packed without the PVC wrapping and irradiated with doses of 0.0, 1.5 or 2.0 kGy. No irradiation effects were observed and the samples were acceptable with no significant difference between samples stored for 1 or 8 days after irradiation. PVC film packaging and irradiation were not efficient in delaying post harvest decay of Toyonoka strawberries in the conditions used in these experiments. (author)

  4. Ultrasound improves chemical reduction of natural contaminant microbiota and Salmonella enterica subsp. enterica on strawberries.

    Science.gov (United States)

    do Rosário, Denes Kaic Alves; da Silva Mutz, Yhan; Peixoto, Jaqueline Moreira Curtis; Oliveira, Syllas Borburema Silva; de Carvalho, Raquel Vieira; Carneiro, Joel Camilo Souza; de São José, Jackline Freitas Brilhante; Bernardes, Patrícia Campos

    2017-01-16

    New sanitization methods have been evaluated to improve food safety and food quality and to replace chlorine compounds. However, these new methods can lead to physicochemical and sensory changes in fruits and vegetables. The present study evaluated the effects of acetic acid, peracetic acid, and sodium dodecylbenzenesulfonate isolated or combined with 5min of ultrasound treatment (40kHz, 500W) on strawberry quality over 9days of storage at 8°C. The strawberry natural contaminant microbiota (molds and yeasts, mesophilic aerobic and lactic acid bacteria), physicochemical quality (pH, total titratable acidity, total soluble solids, vitamin C, and color), sensory quality (triangle test) and inactivation of Salmonella enterica subsp. enterica intentionally inoculated onto strawberries were analyzed. Ultrasound increased the effect of all chemical compounds in the reduction of aerobic mesophilic, molds and yeasts. The best treatment for those groups of microorganisms was ultrasound combined with peracetic acid (US+PA) that reduced 1.8 and 2.0logcfu/g during 9days of storage. Bactericidal effect of peracetic acid was also improved by ultrasound inactivation of S. enterica, reaching a decimal reduction of 2.1logcfu/g. Moreover, synergistic effects were observed in contaminant natural microbiota inactivation for all tested compounds during storage, without any major physicochemical or sensory alteration to the strawberries. Therefore, ultrasound treatment can improve the effect of sanitizers that are substitutes of chlorine compounds without altering the quality of strawberries during storage. Acetic acid (PubChem CID: 176); Peracetic acid (PubChem CID: 6585); Sodium dodecylbenzenesulfonate (PubChem CID: 18372154). Copyright © 2016 Elsevier B.V. All rights reserved.

  5. Energy use and economic analysis of strawberry production in Sanandaj zone of Iran

    Directory of Open Access Journals (Sweden)

    Salami, P.

    2010-01-01

    Full Text Available The aim of this study was to determine the energy consumption and economic analysis for strawberry production. The data were collected from 60 farmers growing strawberry in the Sanandaj zone of Iran by using a face-to-face questionnaire in August-September 2009. The plowing operation at the study area was done by two methods; manually plow (P1 and machinery plow (P2. Also the irrigation operation was done by two methods; pumping irrigation (P and non pumping irrigation (NP. Univariate analysis of variance was used for finding the differences among the total energy used for production and profitability of this crop in the different methods at the 5% and 1% level. Total energy used in various farm operations during strawberry production was 53,605 MJ.ha-1. Total energy output was 17,338 MJ.ha-1, and the average annual yield of strawberry farms was 9,125 kg.ha-1. Energy efficiency was 0.32, and energy productivity calculated as 0.17 kg.MJ-1. This means a production of 0.17 kg per unit energy. The difference between total input energy in the different irrigation types (NP and P is significant at 1% level. There is not any significant difference between different plow types at the 5% level. The interaction of irrigation types and plow types is significant at 5% level. The profit-cost ratio, productivity, and net profit in the strawberry production are 1.2, 0.99, and 1,825 $.ha-1, respectively. The difference between net return in the different irrigation types (NP and P is significant at 5% level. The difference between net return in the different plow types (P1 and P2 is significant at 1% level.

  6. Genetic similarity among strawberry cultivars assessed by RAPD and ISSR markers

    Directory of Open Access Journals (Sweden)

    Rafael Gustavo Ferreira Morales

    2011-12-01

    Full Text Available Most strawberry (Fragaria × ananassa Duchesne cultivars used in Brazil are developed in other countries, it became clear the need to start the strawberry breeding program in the country. To start a breeding program is necessary the genetic characterization of the germplasm available. Molecular markers are important tools that can be used for this purpose. The objectives of the present study were to assess the genetic similarity among 11 strawberry cultivars using RAPD and ISSR molecular markers and to indicate the possible promising crosses. The DNA of the eleven strawberry cultivars was extracted and amplified by PCR with RAPD and ISSR primers. The DNA fragments were separated in agarose gel for the RAPD markers and in polyacrylamide gel for the ISSR markers. The genetic similarity matrix was estimated by the Jaccard coefficient. Based on this matrix, the cultivars were grouped using the UPGMA method. The dendogram generated by the RAPD markers distributed the cultivars in three groups while the ISSR markers generated two groups. There was no direct relationship between the marker groups when the two types of markers were compared. The grouping proposed by the ISSR markers was more coherent with the origin and the genealogy of the cultivars than that proposed by the RAPD markers, and it can be considered the most efficient method for the study of genetic divergence in strawberry. The most promising crosses, based on the genetic divergence estimated from the RAPD and ISSR molecular data were between the Tudla and Ventana and the Oso Grande and Ventana cultivars, respectively.

  7. Effect of gamma-irradiation on the storage life elongation of fresh strawberries and raspberries

    International Nuclear Information System (INIS)

    Tencheva, S.; Todorov, S.

    1975-01-01

    The possibility of preserving strawberries and raspberries at room temperature by irradiation is studied. The fruits were packed in perforated plastic bags and irradiated on gamma-device (Cobalt-60) at a dose power of 1900 rad/min. Strawberries were irradiated with 250 krad, raspberries of ''Rubin'' variety with 150 or 200 krad. Irratiated and control fruits were stored at 20sup(o) - 22sup(o)C and examined every day until the first signs of microbial decay appeared. It is found that the total number of microorganisms drops immediately after irradiation. The earliest signs of decay in control strawberries appeared on the second day after they had been packed; in irradiated strawberries - on the fourth or fifth day, with a rapid progress of decay thereafter. Decay of control raspberries started on the first day and by the fourth day all packages were completely moldy, while irradiated fruits had a very good appearance. Single mold spots appeared on the third or fourth day after exposure to 150 krad and later than the fifth day after exposure to 200 krad. Physico-chemical studies disclosed a tendency toward decrease in the sugar content immediately after irradiation. A post-irradiation decrease in the content of total pectine substances and ascorbic acid was also observed. At the end of preservation ascorbic acid in strawberries was reduced by 33 per cent and in raspberries by 19 - 70 per cent. The spectra of antecyonic substances showed that during the preservation of irradiated fruits oxidation has been more intensive. (Ch.K.)

  8. Effect of ultraviolet-C light on postharvest decay of strawberry

    International Nuclear Information System (INIS)

    Nigro, F.; Ippolito, A.; Salerno, M.; Lattanzio, V.

    2000-01-01

    The effect of ultraviolet-C light (u.v.-C) at low doses on postharvest decay of strawberries caused by Botrytis cinerea and other pathogens was investigated. Phenylalanine ammonia-lyase (PAL) activity and ethylene production, as influenced by ultraviolet-C irradiation, were also determined. Strawberries (cv. ‘Pajaro’) from plants that had been treated with chemicals against grey mould were irradiated with u.v.-C doses ranging from 0.25 to 4.00 kJ m-2 and inoculated with B. cinerea at different times (0, 12, 24 and 48 hours) after irradiation. To assess the effect of u.v.-C light on the naturally occurring postharvest decay, organically grown strawberries were also used. After treatment the strawberries were stored at 20±1°C or at 3°C. u.v.-C doses at 0.50 and 1.00 kJ m-2 significantly reduced botrytis storage rot arising from both artificial inoculations and natural infections in comparison with the unirradiated control. The doses shown to reduce botrytis rot produced an increase in PAL activity 12 h after irradiation; this result indicates the activation of metabolic a pathway related to the biosynthesis of phenolic compounds, which are usually characterized by antifungal activity. In addition, u.v.-C irradiation caused an increase in ethylene production proportional to the doses applied, reaching the highest value 6 h after treatment. The overall results from these investigations indicate that treatment with low u.v.-C doses produces a reduction in postharvest decay of strawberries related to induced resistance mechanisms. Moreover, a germicidal effect of reducing external contaminating pathogens cannot be excluded

  9. A comparison of nutrient density scores for 100% fruit juices.

    Science.gov (United States)

    Rampersaud, G C

    2007-05-01

    The 2005 Dietary Guidelines for Americans recommend that consumers choose a variety of nutrient-dense foods. Nutrient density is usually defined as the quantity of nutrients per calorie. Food and nutrition professionals should be aware of the concept of nutrient density, how it might be quantified, and its potential application in food labeling and dietary guidance. This article presents the concept of a nutrient density score and compares nutrient density scores for various 100% fruit juices. One hundred percent fruit juices are popular beverages in the United States, and although they can provide concentrated sources of a variety of nutrients, they can differ considerably in their nutrient profiles. Six methodologies were used to quantify nutrient density and 7 100% fruit juices were included in the analysis: apple, grape, pink grapefruit, white grapefruit, orange, pineapple, and prune. Food composition data were obtained from the USDA National Nutrient Database for Standard Reference, Release 18. Application of the methods resulted in nutrient density scores with a range of values and magnitudes. The relative scores indicated that citrus juices, particularly pink grapefruit and orange juice, were more nutrient dense compared to the other nonfortified 100% juices included in the analysis. Although the methods differed, the relative ranking of the juices based on nutrient density score was similar for each method. Issues to be addressed regarding the development and application of a nutrient density score include those related to food fortification, nutrient bioavailability, and consumer education and behavior.

  10. Phenolics content and antioxidant capacity of commercial red fruit juices

    Directory of Open Access Journals (Sweden)

    Mitić Milan N.

    2011-01-01

    Full Text Available The content of phenolics: total phenols (TP, flavonoids (TF, anthocyanins (TA and hydroxicinnamic acid as well as the total antioxidant capacity (TAC in nine commercial red fruit juices (sour cherry, black currant, red grape produced in Serbia were evaluated. The total compounds content was measured by spectrophotometric methods, TAC was determined using DPPH assays, and individual anthocyanins and hydroxycinnamic acids was determined using HPLC-DAD methods. Among the examined fruit juices, the black currant juices contained the highest amounts of all groups of the phenolics and exhibited strong antioxidant capacity. The amount of anthocyanins determined by HPLC method ranged from 92.36 to 512.73 mg/L in red grape and black currant juices, respectively. The anthocyanins present in the investigated red fruit juices were derivatives of cyanidin, delphinidin, petunidin, peonidin and malvidin. The predominant phenolic acid was neoclorogenic acid in sour cherry, caffeic acid in black currant, and p-coumaric acid in black grape juices. Generally, the red fruit juices produced in the Serbia are a rich source of the phenolic, which show evident antioxidant capacity.

  11. BIOLOGICAL ACTIVITY OF APPLE JUICE ENRICHED BY HERBAL EXTRACTS

    Directory of Open Access Journals (Sweden)

    Eva Ivanišová

    2015-02-01

    Full Text Available Herbal phytochemicals have recently become an attractive subject for scientists in many different research areas. The aim of this study was to determine antioxidant activity, total polyphenol and flavonoid content of apple juice enriched by water herbal extracts. Secondary was to evaluate sensory characteristic of enriched apple juice. It was found that applications of water herbal extracts to apple juice increase antioxidant activities, and also total polyphenol and flavonoid content with compare to pure apple juice. The highest biological activities were detected in apple juice with addition of lemon balm (14.42 mg TEAC/L; 84.38 mg TEAC/L; 50.88 mg GAE/L; 36.26 μg QE/L, oregano (14.92 mg TEAC/L; 79.97 mg TEAC/L; 50.51 mg GAE/L; 31.02 μg QE/L and salvia (8.40 mg TEAC/L; 30.40 mg TEAC/L; 23.33 mg GAE/L; 27.67 μg QE/L water extract. Sensorial analysis of samples showed, that enriched juices had better properties for evaluators with compared to pure juice. The aim of this study was also to mention the potential use of medicinal herbs in food industry, because plant bioactive compounds can play an important role in preventing cardiovascular diseases, cancers and reduction inflammatory action.

  12. Effect of genotype and environment on citrus juice carotenoid content.

    Science.gov (United States)

    Dhuique-Mayer, Claudie; Fanciullino, Anne-Laure; Dubois, Cecile; Ollitrault, Patrick

    2009-10-14

    A selection of orange and mandarin varieties belonging to the same Citrus accession and cultivated in Mediterranean (Corsica), subtropical (New Caledonia), and tropical areas (principally Tahiti) were studied to assess the effect of genotype and environmental conditions on citrus juice carotenoid content. Juices from three sweet orange cultivars, that is, Pera, Sanguinelli, and Valencia ( Citrus sinensis (L.) Osbeck), and two mandarin species ( Citrus deliciosa Ten and Citrus clementina Hort. ex Tan), were analyzed by HPLC using a C(30) column. Annual carotenoid content variations in Corsican fruits were evaluated. They were found to be very limited compared to variations due to varietal influences. The statistical analysis (PCA, dissimilarity tree) results based on the different carotenoid compounds showed that citrus juice from Corsica had a higher carotenoid content than citrus juices from tropical origins. The tropical citrus juices were clearly differentiated from citrus juices from Corsica, and close correlations were obtained between beta-cryptoxanthin and phytoene (r = 0.931) and beta-carotene and phytoene (r = 0.918). More broadly, Mediterranean conditions amplified interspecific differentiation, especially by increasing the beta-cryptoxanthin and cis-violaxanthin content in oranges and beta-carotene and phytoene-phytofluene content in mandarins. Thus, at a quantitative level, environmental conditions also had a major role in determining the levels of carotenoids of nutritional interest, such as the main provitamin A carotenoids in citrus juice (beta-cryptoxanthin and beta-carotene).

  13. Isotope analysis (δ13C of pulpy whole apple juice

    Directory of Open Access Journals (Sweden)

    Ricardo Figueira

    2011-09-01

    Full Text Available The objectives of this study were to develop the method of isotope analysis to quantify the carbon of C3 photosynthetic cycle in pulpy whole apple juice and to measure the legal limits based on Brazilian legislation in order to identify the beverages that do not conform to the Ministry of Agriculture, Livestock and Food Supply (MAPA. This beverage was produced in a laboratory according to the Brazilian law. Pulpy juices adulterated by the addition of sugarcane were also produced. The isotope analyses measured the relative isotope enrichment of the juices, their pulpy fractions (internal standard and purified sugar. From those results, the quantity of C3 source was estimated by means of the isotope dilution equation. To determine the existence of adulteration in commercial juices, it was necessary to create a legal limit according to the Brazilian law. Three brands of commercial juices were analyzed. One was classified as adulterated. The legal limit enabled to clearly identify the juice that was not in conformity with the Brazilian law. The methodology developed proved efficient for quantifying the carbon of C3 origin in commercial pulpy apple juices.

  14. Electron spin resonance identification of irradiated fruits

    International Nuclear Information System (INIS)

    Raffi, J.J.; Agnel, J.-P.L.

    1989-01-01

    The electron spin resonance spectrum of achenes, pips, stalks and stones from irradiated fruits (stawberry, raspberry, red currant, bilberry, apple, pear, fig, french prune, kiwi, water-melon and cherry) always displays, just after γ-treatment, a weak triplet (a H ∼30 G) due to a cellulose radical; its left line (lower field) can be used as an identification test of irradiation, at least for strawberries, raspberries, red currants or bilberries irradiated in order to improve their storage time. (author)

  15. The variation in firmness measurements of individual non-irradiated and irradiated parfaite strawberries using a modified Ballauf penetrometer

    International Nuclear Information System (INIS)

    Visser, C.J.; Truter, A.B.; De Villiers, F.

    1977-01-01

    This paper discusses the results of extensive measurements on the firmness of healthy and unmarked strawberries of export size after irradiation at a dose of 200 krad and after no irradiation treatment

  16. Identification of urinary biomarkers after consumption of sea buckthorn and strawberry, by untargeted LC-MS metabolomics

    DEFF Research Database (Denmark)

    Cuparencu, Catalina Sinziana; Andersen, Maj-Britt Schmidt; Gürdeniz, Gözde

    2016-01-01

    , strawberry and sea buckthorn, in humans. A randomized controlled single-blinded three-way cross-over meal study was conducted in 16 overweight men. The intervention meals consisted of sea buckthorn puree, strawberry puree or an iso-caloric control drink. Urine samples were collected on each test day at t...... in very low concentrations and therefore not identified. Nine and 11 markers were (tentatively) identified for strawberry and sea buckthorn, respectively, the most specific being conjugates of aroma compounds and coloring flavonoids. Metabolites reflecting the step-wise aromatization of quinic to hippuric...... profiling after consumption of sea buckthorn or strawberries. Combinations of these markers are proposed as potentially specific for intake of each of these berries, but need further validation in larger and less-controlled study settings....

  17. Stability of unpasteurized and refrigerated orange juice

    Directory of Open Access Journals (Sweden)

    Maria Cristina Corrêa de Souza

    2004-07-01

    Full Text Available The stability of orange juice obtained from a small extractor and stored in a polyethylene bottle was assessed under isothermal and non-isothermal storage conditions at 4, 8 and 12ºC for 72 hours. pH, titratable acidity and Brix did not alter significantly during the 72 hours storage. Microbiological analysis showed high initial count for moulds and yeasts that increased in the juice stored for 72h under the non-isothermal conditions with temperature abuse (12��C/4h. Date of the sensory evaluation showed a small reduction in product acceptance in this condition. The juice, in the recommended validity period (48h, presented losses of less than 20% of the initial ascorbic acid content regardless of the treatment. However, after this time, the degradation became accentuated reaching, at 72h storage, retentions of 72 to 85%.Desenvolvimento microbiano, ação enzimática e reações químicas influenciam a qualidade de suco de laranja natural não-pasteurizado, podendo comprometer características sensoriais e provocar perdas nutricionais. A estabilidade do suco, obtido em extrator de pequeno porte e acondicionado em embalagem de polietileno, foi avaliada em condições isotérmicas e não-isotérmicas de armazenamento em temperaturas entre 4 e 12ºC por 72h. Valores de pH, acidez titulável e sólidos solúveis totais não se alteraram significativamente ao longo do armazenamento em todas as condições. Resultados da análise microbiológica mostraram alta contagem inicial de bolores e leveduras, que aumentaram no suco armazenado por 72h na condição não isotérmica onde houve abuso de temperatura (12ºC por 4h. Os testes sensoriais mostraram uma pequena redução na aceitação do produto nessa mesma condição. Constatou-se que o suco, no período preconizado como prazo de validade (48h, apresentou perdas inferiores a 20% do teor inicial de ácido ascórbico, independentemente do tratamento. A partir deste momento, a degradação se

  18. Effects of Juice Matrix and Pasteurization on Stability of Black Currant Anthocyanins during Storage.

    Science.gov (United States)

    Dobson, Gary; McDougall, Gordon J; Stewart, Derek; Cubero, Miguel Ángel; Karjalainen, Reijo O

    2017-01-01

    The effects of juice matrix and pasteurization on the stability of total phenols and especially total and individual anthocyanins were examined in black currant (BC) juice and mixtures with apple, persimmon, and peach juices at 4 °C and 20 °C. Total phenol content decreased in all juices at both temperatures but there was a trend to lower levels in unpasteurized over pasteurized juices. Differences in the decline of total anthocyanins between pasteurized and unpasteurized juices varied according to the juice type and the storage temperature. At 4 °C storage, anthocyanins declined in all juices according to pseudo 1st-order kinetics and there were only small differences in the rates between pasteurized and unpasteurized juices. However, at 20 °C, although pasteurized and unpasteurized BC juices and pasteurized mixed juices followed pseudo 1st-order kinetics, there was a different pattern in unpasteurized mixed juices; a rapid initial decline was followed by a slowing down. The effect of the added juice on anthocyanin decline was also different at either temperature. At 4 °C, the anthocyanins decreased faster in mixed juices than BC juice alone, but at 20 °C, at least in pasteurized mixed juices, the decline was similar or even slower than in BC juice; there were only small differences among the 3 mixed juices. At 20 °C, in pasteurized and unpasteurized BC juices, the rate of decrease was essentially the same for all 4 individual anthocyanins but in the mixed juices the 2 glucosides decreased significantly faster than the 2 rutinosides. © 2016 Institute of Food Technologists®.

  19. Nuclear magnetic resonance characterization of apple juice containing enzyme preparations

    International Nuclear Information System (INIS)

    Prestes, Rosilene A.; Almeida, Denise Milleo; Barison, Andersson; Pinheiro, Luis Antonio; Wosiacki, Gilvan

    2012-01-01

    In this work, 1 H nuclear magnetic resonance ( 1 H NMR) was employed to evaluate changes in apple juice in response to the addition of Panzym Yieldmash and Ultrazym AFP-L enzymatic complexes and compare it with premium apple juice. The juice was processed at different temperatures and concentrations of enzymatic complexes. The differences in the results were attributed mainly to the enzyme concentrations, since temperature did not cause any variation. A quantitative analysis indicated that the concentration of fructose increased while the concentrations of sucrose and glucose decreased in response to increasing concentrations of the enzymatic complexes. (author)

  20. Disappearance of patulin during alcoholic fermentation of apple juice.

    Science.gov (United States)

    Stinson, E E; Osman, S F; Huhtanen, C N; Bills, D D

    1978-10-01

    Eight yeast strains were used in three typical American processes to ferment apple juice containing 15 mg of added patulin per liter. Patulin was reduced to less than the minimum detectable level of 50 microgram/liter in all but two cases; in all cases, the level of patulin was reduced by over 99% during alcoholic fermentation. In unfermented samples of apple juice, the concentration of added patulin declined by only 10% when the juice was held for 2 weeks, a period equivalent to the time required for fermentation.

  1. In-home versus laboratory sensory testing using non-expert consumers: A comparable study using testing of varieties of Danish strawberries as cases

    DEFF Research Database (Denmark)

    Østergaard, Peder

    varieties of strawberries, which are able to satisfy both consumer and producer demands, in which both testing approaches have been used. As part of the project the following methodological steps were taken in order to identify consumer preferences for strawberries: focus group interviews aiming at finding...... the relevant question for a large scale survey among Danish households (n=1162), showing the households general knowledge, attitudes and behaviour when buying and consuming strawberries. From this large scale survey n=120 persons were randomly selected for participation in experiments, where 9 new varieties...... and 2 well-known varieties of strawberries were tested. The testing used a split-over design where each person participated in sensory testing of 5 different varieties of strawberries. Besides all the participant in the experiment were asked to do an in-home test of 2 of the 5 varieties of strawberries...

  2. Statement on the dossier for a derogation request of the US authorities concerning cold-treated strawberry plants intended for planting

    DEFF Research Database (Denmark)

    Baker, R.; Candresse, T.; Dormannsné Simon, E.

    2009-01-01

    Following a request from the European Commission, the EFSA Panel on Plant Health examined the report “Evaluation of Strawberry Nursery Plant Cold Treatments on Survival of the Whitefly, Bemisia tabaci”, submitted to the European Commission by the United States Department of Agriculture (USDA...... the effectiveness of the cold treatment proposed for the elimination of B. tabaci from strawberry plant consignments prepared for shipment to the EU. In addition, the Panel conducted a preliminary review of the available literature on viruses of strawberry and concluded that no B. tabaci-transmitted viruses...... are currently known to infect strawberry and that no viruses of Fragaria listed in European Council Directive 2000/29/EC are known to be transmitted by B. tabaci. However, adult whiteflies of B. tabaci on strawberry consignments can carry plant viruses irrespective of whether strawberry is a host plant...

  3. Crossflow microfiltration of sugarcane juice: effects of processing conditions and juice quality

    Directory of Open Access Journals (Sweden)

    Katia Rezzadori

    2014-03-01

    Full Text Available Sugarcane juice with passion fruit pulp was clarified using microfiltration under different T (temperature, P (pressure, and V (tangential velocity. The effects of these processing parameters were evaluated applying a rotational central composite experimental design (RCCD and response surface methodology (RSM. The tests were performed at a filtration pilot plant using a polyamide hollow-fiber membrane with an average pore diameter of 0.4 µm and filtration area of 0.723 m². In addition, the resistances to the permeate flux during the microfiltration were investigated according to the series resistance. The final permeate flux ranged from 7.05 to 17.84 L·h- 1·m- 2. There was a rapid decline in flux (50% in the initial stages of microfiltration. T and V were the major variables responsible for the flux increase. The concentration polarization showed the greatest influence on the flux decline, and highest values for the flux decline rate (λ were found when low pressures were used. In the clarified juice there was a reduction in the contents of total solids, proteins, vitamin C, and acidity, while the soluble solids, pH, and ash contents did not change. Finally, membrane process could produce high quality filtered sugarcane juice with substantial flux and increased luminosity improving organoleptical properties.

  4. A New Perspective on Polyploid Fragaria (Strawberry) Genome Composition Based on Large-Scale, Multi-Locus Phylogenetic Analysis

    OpenAIRE

    Yang, Yilong; Davis, Thomas M

    2017-01-01

    Abstract The subgenomic compositions of the octoploid (2n = 8× = 56) strawberry (Fragaria) species, including the economically important cultivated species Fragaria x ananassa, have been a topic of long-standing interest. Phylogenomic approaches utilizing next-generation sequencing technologies offer a new window into species relationships and the subgenomic compositions of polyploids. We have conducted a large-scale phylogenetic analysis of Fragaria (strawberry) species using the Fluidigm Ac...

  5. Nitrile versus Latex for Glove Juice Sampling.

    Science.gov (United States)

    Landers, Timothy F; Dent, Anthony

    2014-01-01

    The objective of this study was to explore the utility of nitrile gloves as a replacement for latex surgical gloves in recovering bacteria from the hands. Two types of nitrile gloves were compared to latex gloves using the parallel streak method. Streaks of Klebsiella pneumoniae and Staphylococcus aureus were made on tryptic soy agar plates, and the zones of inhibition were measured around pieces of glove material placed on the plates. Latex gloves produced a mean zone of inhibition of 0.28 mm, compared to 0.002 mm for nitrile gloves (pnitrile may be a viable alternative to latex in glove juice sampling methods, since nitrile avoids the risk of latex exposure.

  6. Nitrile versus Latex for Glove Juice Sampling.

    Directory of Open Access Journals (Sweden)

    Timothy F Landers

    Full Text Available The objective of this study was to explore the utility of nitrile gloves as a replacement for latex surgical gloves in recovering bacteria from the hands. Two types of nitrile gloves were compared to latex gloves using the parallel streak method. Streaks of Klebsiella pneumoniae and Staphylococcus aureus were made on tryptic soy agar plates, and the zones of inhibition were measured around pieces of glove material placed on the plates. Latex gloves produced a mean zone of inhibition of 0.28 mm, compared to 0.002 mm for nitrile gloves (p<.001. While the parallel streak method is not intended as a quantitative estimate of antimicrobial properties, these results suggest that nitrile may be a viable alternative to latex in glove juice sampling methods, since nitrile avoids the risk of latex exposure.

  7. Molecular Diversity of Anthracnose Pathogen Populations Associated with UK Strawberry Production Suggests Multiple Introductions of Three Different Colletotrichum Species.

    Directory of Open Access Journals (Sweden)

    Riccardo Baroncelli

    Full Text Available Fragaria × ananassa (common name: strawberry is a globally cultivated hybrid species belonging to Rosaceae family. Colletotrichum acutatum sensu lato (s.l. is considered to be the second most economically important pathogen worldwide affecting strawberries. A collection of 148 Colletotrichum spp. isolates including 67 C. acutatum s.l. isolates associated with the phytosanitary history of UK strawberry production were used to characterize multi-locus genetic variation of this pathogen in the UK, relative to additional reference isolates that represent a worldwide sampling of the diversity of the fungus. The evidence indicates that three different species C. nymphaeae, C. godetiae and C. fioriniae are associated with strawberry production in the UK, which correspond to previously designated genetic groups A2, A4 and A3, respectively. Among these species, 12 distinct haplotypes were identified suggesting multiple introductions into the country. A subset of isolates was also used to compare aggressiveness in causing disease on strawberry plants and fruits. Isolates belonging to C. nymphaeae, C. godetiae and C. fioriniae representative of the UK anthracnose pathogen populations showed variation in their aggressiveness. Among the three species, C. nymphaeae and C. fioriniae appeared to be more aggressive compared to C. godetiae. This study highlights the genetic and pathogenic heterogeneity of the C. acutatum s.l. populations introduced into the UK linked to strawberry production.

  8. Improved Stable Isotope Dilution Assay for Dietary Folates Using LC-MS/MS and Its Application to Strawberries

    Directory of Open Access Journals (Sweden)

    Lisa Striegel

    2018-02-01

    Full Text Available Folates play an important role in the human body and a deficiency of this vitamin can cause several diseases. Therefore, a reliable analytical method is crucial for the determination of folate vitamers in strawberries and other dietary folate sources. A stable isotope dilution LC-MS/MS method for analyzing folates in food was developed and validated. The folate vitamers Pteroylmonoglutamic acid, tetrahydrofolate, 5-methyltetrahydrofolate, and 5-formyltetrahydrofolate were quantified using 13C-labeled internal standards. Validation of the assay was accomplished by determining linearity, precision, recovery, limit of detection, and limit of quantification and revealed to be a precise, sensitive, and accurate method to determine folate vitamers. Strawberries are worldwide consumed and known to be a good dietary source of nutritive compounds. Using this method, folate concentrations in selected commercial strawberry cultivars and experimental breeding lines grown in Germany and Australia were investigated. Total folates varied from 59 to 153 μg/100 g on fresh weight basis. Furthermore, folate content after lyophilizing or freezing did not show any significant differences compared to fresh strawberries. However, significant losses of total folates in pureed strawberries could be observed after 5 days of storage with only 16% of the original concentration retained. In summary, some of the investigated strawberry cultivars/breeding lines can be considered as rich dietary sources of natural folates.

  9. Molecular Diversity of Anthracnose Pathogen Populations Associated with UK Strawberry Production Suggests Multiple Introductions of Three Different Colletotrichum Species

    Science.gov (United States)

    Baroncelli, Riccardo; Zapparata, Antonio; Sarrocco, Sabrina; Sukno, Serenella A.; Lane, Charles R.; Thon, Michael R.; Vannacci, Giovanni; Holub, Eric; Sreenivasaprasad, Surapareddy

    2015-01-01

    Fragaria × ananassa (common name: strawberry) is a globally cultivated hybrid species belonging to Rosaceae family. Colletotrichum acutatum sensu lato (s.l.) is considered to be the second most economically important pathogen worldwide affecting strawberries. A collection of 148 Colletotrichum spp. isolates including 67 C. acutatum s.l. isolates associated with the phytosanitary history of UK strawberry production were used to characterize multi-locus genetic variation of this pathogen in the UK, relative to additional reference isolates that represent a worldwide sampling of the diversity of the fungus. The evidence indicates that three different species C. nymphaeae, C. godetiae and C. fioriniae are associated with strawberry production in the UK, which correspond to previously designated genetic groups A2, A4 and A3, respectively. Among these species, 12 distinct haplotypes were identified suggesting multiple introductions into the country. A subset of isolates was also used to compare aggressiveness in causing disease on strawberry plants and fruits. Isolates belonging to C. nymphaeae, C. godetiae and C. fioriniae representative of the UK anthracnose pathogen populations showed variation in their aggressiveness. Among the three species, C. nymphaeae and C. fioriniae appeared to be more aggressive compared to C. godetiae. This study highlights the genetic and pathogenic heterogeneity of the C. acutatum s.l. populations introduced into the UK linked to strawberry production. PMID:26086351

  10. Improved stable isotope dilution assay for dietary folates using LC-MS/MS and its application to strawberries

    Science.gov (United States)

    Striegel, Lisa; Chebib, Soraya; Netzel, Michael E.; Rychlik, Michael

    2018-02-01

    Folates play an important role in the human body and a deficiency of this vitamin can cause several diseases. Therefore, a reliable analytical method is crucial for the determination of folate vitamers in strawberries and other dietary folate sources. A stable isotope dilution LC-MS/MS method for analyzing folates in food was developed and validated. The folate vitamers Pteroylmonoglutamic acid, tetrahydrofolate, 5-methyltetrahydrofolate and 5-formyltetrahydrofolate were quantified using 13C-labelled internal standards. Validation of the assay was accomplished by determining linearity, precision, recovery, limit of detection and limit of quantification and revealed to be a precise, sensitive and accurate method to determine folate vitamers. Strawberries are worldwide consumed and known to be a good dietary source of nutritive compounds. Using this method, folate concentrations in selected commercial strawberry cultivars and experimental breeding lines grown in Germany were investigated. Total folates varied from 59 to 153 µg/100 g on fresh weight basis. Furthermore, folate content after lyophilizing or freezing did not show any significant differences compared to fresh strawberries. However, significant losses of total folates in pureed strawberries could be observed after 5 days of storage with only 16 % of the original concentration retained. In summary, some of the investigated strawberry cultivars/breeding lines can be considered as rich dietary sources of natural folates.

  11. Novel Fungal Pathogenicity and Leaf Defense Strategies Are Revealed by Simultaneous Transcriptome Analysis of Colletotrichum fructicola and Strawberry Infected by This Fungus

    OpenAIRE

    Liqing Zhang; Xin Huang; Chengyong He; Chengyong He; Qing-Yu Zhang; Xiaohua Zou; Ke Duan; Ke Duan; Qinghua Gao

    2018-01-01

    Colletotrichum fructicola, which is part of the C. gloeosporioides species complex, can cause anthracnose diseases in strawberries worldwide. However, the molecular interactions between C. fructicola and strawberry are largely unknown. A deep RNA-sequencing approach was applied to gain insights into the pathogenicity mechanisms of C. fructicola and the defense response of strawberry plants at different stages of infection. The transcriptome data showed stage-specific transcription accompanied...

  12. Recovery of volatile fruit juice aroma compounds by membrane technology

    DEFF Research Database (Denmark)

    Bagger-Jørgensen, Rico; Meyer, Anne S.; Pinelo, Manuel

    2011-01-01

    The influence of temperature (10–45°C), feed flow rate (300–500L/h) and sweeping gas flow rate (1.2–2m3/h) on the recovery of berry fruit juice aroma compounds by sweeping gas membrane distillation (SGMD) was examined on an aroma model solution and on black currant juice in a lab scale membrane...... distillation set up. The data were compared to recovery of the aroma compounds by vacuum membrane distillation (VMD). The flux of SGMD increased with an increase in temperature, feed flow rate or sweeping gas flow rate. Increased temperature and feed flow rate also increased the concentration factors...... the degradation of anthocyanins and polyphenolic compounds in the juice. Industrial relevanceHigh temperature evaporation is the most widely used industrial technique for aroma recovery and concentration of juices, but membrane distillation (MD) may provide for gentler aroma stripping and lower energy consumption...

  13. Spray drying of fruit and vegetable juices--a review.

    Science.gov (United States)

    Verma, Anjali; Singh, Satya Vir

    2015-01-01

    The main cause of spray drying is to increase the shelf life and easy handling of juices. In the present paper, the studies carried out so far on spray drying of various fruits and vegetables are reported. The major fruit juices dried are mango, banana, orange, guava, bayberry, watermelon, pineapple, etc. However, study on vegetable juices is limited. In spray drying, the major optimized parameters are inlet air temperature, relative humidity of air, outlet air temperature, and atomizer speed that are given for a particular study. The juices in spray drying require addition of drying agents that include matlodextrin, liquid glucose, etc. The drying agents are added to increase the glass transition temperature. Different approaches for spray dryer design have also been discussed in the present work.

  14. MUCILAGINOUS PLANTS IN THE CLARIFICATION OF SUGAR CANE JUICE

    Directory of Open Access Journals (Sweden)

    Walter Francisco Quezada Moreno

    2016-04-01

    Full Text Available The aim is to incorporate mucilaginous solutions in the juice clarification process as an alternative for improving the final products that are produced in the agribusiness panela in Ecuador. The study was conducted with 14 mucilaginous plants properties, five plant species: Mallow wild (Malva peruviana L., Yausabara (Pavonia sepium A. St-Hil Yausa (Abutilon famous Planch, black Cadillo (Triumfetta Lappula L and False Joaquín (Hibiscus rosa-sinensis, it was obtained excellent results as clarifying agents. Three factors were assayed experimentally such as solution concentration, amount of solution added to the juice and incorporation temperature on two levels, judged by turbidity variable as a response. The results indicated that the factors tested affect significantly the juice clarification (clear and bright and the best results were achieved with turbidity (Yausabara and Yausa Malva silvestre, Falso Joaquín y Cadillo negro and with the combinations obtaining juices.

  15. Stable isotopes determination in some Romanian fruit juices.

    Science.gov (United States)

    Magdas, Dana Alina; Puscas, Romulus

    2011-09-01

    The characterisation of 45 Romanian single-strength fruit juices (apples, pears, plums and grapes) collected from different Transylvanian areas by means of stable isotope approach are presented and discussed in this study. We measured (2)H/(1)H, (18)O/(16)O ratios from water juice and (13)C/(12)C from pulp and compared these results with those already reported in the literature for single-strength juices, in order to see how the geographical and climatic conditions of Transylvania and the meteorological peculiarities of the year 2010 influence the isotopic composition of the investigated fruit juices. The δ(13)C mean values that we found for apple pulp picked up from different Transylvanian areas show slight differences, probably due to the environmental conditions of the plants. No significant correlation either between the variety of apple or the geographical origin and δ(13)C value was established.

  16. comparative in vitro antioxidant properties of water juice from ...

    African Journals Online (AJOL)

    JUICE FROM SELECTED AFRICAN FRUITS CONSUMED IN ... from African star apple (Chrysophyllumafricanum) and cocoa (Theobroma cacao) were significantly (p<0.05) higher .... the formula as given by Chinaka and colleagues, and.

  17. Microbiological Quality of Juice Beverages Available in Dar es

    African Journals Online (AJOL)

    SUBZERO/BETAONE/VDOWN

    against 15 commonly used antibiotics using the Kirby-Bauer disk diffusion method. Reference ... contaminants. MATERIALS AND METHODS .... to both raw materials and ready-to-use juices. [27]. ... in place the Hazard Analysis Critical Control.

  18. LIFE CYCLE DESIGN OF MILK AND JUICE PACKAGING

    Science.gov (United States)

    A life cycle design demonstration project was initiated between the U.S. Environmental Protection Agency, National Risk Management Research Laboratory, Dow Chemical Company, and the University of Michigan to investigate milk and juice packagie design. The primary objective of ...

  19. Development of functional beverage from wheat grass juice

    Directory of Open Access Journals (Sweden)

    Liana Claudia SALANTA

    2016-11-01

    Full Text Available The juice from wheat grass is called "green blood" and is an excellent detoxifying, facilitating the elimination of toxins and fats from body. In the form of fresh juice, it has high concentrations of chlorophyll, active enzymes, vitamins and other nutrients. The aim of this work was the development and characterization of a functional beverage from green wheat juice by adding apple and limes. The antioxidant capacity, vitamin C, polyphenols and flavonoids content were quantified by using spectrophotometry. The final product was pasteurized and evaluated by the content of bioactive compounds during storage at intervals of 7 and 14 days. During storage there were found slight decreases of the contents of bioactive compounds. The juice obtained has a sweet-sour taste, a unique flavor and a very pleasant smell. This product targets all categories of consumers and represents an ideal morning snack for those who are concerned about a healthy lifestyle.

  20. Development and Analysis of Quality Parameters of an Innovative Juice

    Directory of Open Access Journals (Sweden)

    Anca FARCAS

    2017-05-01

    Full Text Available Nowadays, the functional products represent a sustainable trend in food industry due to the beneficial effects that they have on the human body as well as due to the increased interest of people for a healthy and balanced lifestyle. The aim of the present study was to develop and optimize a pumpkin and apple functional juice, respectively to accomplish the quality control in terms of its physicochemical and sensorial properties. The highest levels of vitamin C occurred in pumpkin and implicitly in the juice obtained in the 1:1 ratio, which also presented the highest antioxidant activity. The nitrates content was at very low level in all the analysed sample, with values between 24.7-41.2 mg/kg for apple and pumpkin, respectively between 28.41-30.94 mg/kg for juices. Also, the consumers were impressed by sensorial and nutritional properties of the new product, positively appreciating both variants of juice.

  1. Chemical and physicochemical characteristics changes during passion fruit juice processing

    Directory of Open Access Journals (Sweden)

    Aline Gurgel Fernandes

    2011-09-01

    Full Text Available Passion fruit is widely consumed due to its pleasant flavour and aroma acidity, and it is considered very important a source of minerals and vitamins. It is used in many products such as ice-cream, mousses and, especially, juices. However, the processing of passion fruit juice may modify the composition and biodisponibility of the bioactive compounds. Investigations of the effects of processing on nutritional components in tropical juices are scarce. Frequently, only losses of vitamin C are evaluated. The objective of this paper is to investigate how some operations of passion fruit juice processing (formulation/homogeneization/thermal treatment affect this product's chemical and physicochemical characteristics. The results showed that the chemical and physicochemical characteristics are little affected by the processing although a reduction in vitamin C contents and anthocyanin, large quantities of carotenoids was verified even after the pasteurization stage.

  2. Power of Your Pancreas: Keep Your Digestive Juices Flowing

    Science.gov (United States)

    ... 2017 Print this issue The Power of Your Pancreas Keep Your Digestive Juices Flowing En español Send ... in Check Better Check Your Bowels Wise Choices Pancreas Problems? Talk to your doctor if you have ...

  3. Patulin reduction in apple juice by inactivated Alicyclobacillus spp.

    Science.gov (United States)

    Yuan, Y; Wang, X; Hatab, S; Wang, Z; Wang, Y; Luo, Y; Yue, T

    2014-12-01

    This study aimed to investigate the reduction of patulin (PAT) in apple juice by 12 inactivated Alicyclobacillus strains. The reduction rate of PAT by each strain was determined by high-performance liquid chromatography (HPLC). The results indicated that the removal of PAT was strain specific. Alicyclobacillus acidoterrestris 92 and A. acidoterrestris 96 were the most effective ones among the 12 tested strains in the removal of PAT. Therefore, these two strains were selected to study the effects of incubation time, initial PAT concentration and bacteria powder amount on PAT removal abilities of Alicyclobacillus. The highest PAT reduction rates of 88·8 and 81·6% were achieved after 24-h incubation with initial PAT concentration of 100 μg l(-1) and bacteria powder amount of 40 g l(-1) , respectively. Moreover, it was found that the treatment by these 12 inactivated Alicyclobacillus strains had no negative effect on the quality parameters of apple juice. Similar assays were performed in supermarket apple juice, where inactivated Alicyclobacillus cells could efficiently reduce PAT content. Taken together, these data suggest the possible application of this strategy as a means to detoxify PAT-contaminated juices. Inactivated Alicyclobacillus cells can efficiently reduce patulin concentration in apple juice. It provides a theoretical foundation for recycling of Alicyclobacillus cells from spoiled apple juice to reduce the source of pollution and the cost of juice industry. This is the first report on the use of Alicyclobacillus to remove patulin from apple juice. © 2014 The Society for Applied Microbiology.

  4. Physico-chemical evaluation of radiation effects on apple juice

    International Nuclear Information System (INIS)

    Blumer, Lucimara; Domarco, Rachel E.; Spoto, Maria H.F.; Walder, Julio M.M.; Matraia, Clarice

    1997-01-01

    Gala and Fuji varieties apple's juice were clarified with enzyme and irradiated aiming to extend the shelf-life without conservants and chemical additives. The juices were analysed for soluble solids, titrable acidity, pH and color. Results showed effect of storage periods in soluble solids, pH and color. The variety and storage period modified the titrable acidity. The pH was altered by irradiation dose and the storage period. (author). 9 refs., 6 figs

  5. Squeezing fact from fiction about 100% fruit juice.

    Science.gov (United States)

    Clemens, Roger; Drewnowski, Adam; Ferruzzi, Mario G; Toner, Cheryl D; Welland, Diane

    2015-03-01

    Total fruit intake in the United States is ~1 cup equivalent per day, or one-half of the 2010 Dietary Guidelines for Americans recommendation for adults. Two-thirds of the fruit consumed is whole fruit and one-third is 100% juice. The nutritional value of whole fruit, with the exception of fiber and vitamin C, may be retained with appropriate juice production methods and storage conditions. One-hundred percent fruit juice consumption is associated with a number of health benefits, such as improved cardiovascular health and decreased obesity, although some of these and other potential benefits are controversial. Comprehensive analyses of the evidence by the Academy of Nutrition and Dietetics in 2014, the US Dietary Guidelines Advisory Committee in 2010, and the Australian Dietary Guidelines of 2013 concluded that 100% fruit juice is not related to adiposity in children when consumed in appropriate amounts for age and energy needs. However, some reports suggest the consumption of fruit juice contributes to unhealthful outcomes, particularly among children. A dietary modeling study on the best ways to meet the fruit intake shortfall showed that a combination of whole fruit and 100% juice improved dietary density of potassium and vitamin C without significantly increasing total calories. Notably, 100% juice intake was capped at amounts consistent with the 2001 American Pediatric Association guidance. The preponderance of evidence supports the position that 100% fruit juice delivers essential nutrients and phytonutrients, provides year-round access to a variety of fruits, and is a cost-effective way to help people meet fruit recommendations. © 2015 American Society for Nutrition.

  6. GUAVA JUICE REDUCES CHOLESTEROL LEVEL FOR ELDERLY WITH HYPERTENSION

    OpenAIRE

    Afitasari, Dian Rahma; Yusuf, Ah.; Effendi, Fery

    2017-01-01

    Introduction: Hypertensive disease is closely related to high cholesterol level, which may act as one of causes of death in elderly. The objective of this study was to analyze the effect of guava juice on the reduction of cholesterol level of hypertensive elderly at Community Health Center, Pacar Keling, Surabaya. Method: Quasy–experimental was used in this study. Sample comprised of 14 respondents who met the inclusion criteria. The independent variable was guava juice and the dependent vari...

  7. Guava Juice Reduces Cholesterol Level for Elderly with Hypertension

    OpenAIRE

    Afitasari, Dian Rahma; Yusuf, Ah; Effendi, Fery

    2010-01-01

    Introduction: Hypertensive disease is closely related to high cholesterol level, which may act as one of causes of death in elderly. The objective of this study was to analyze the effect of guava juice on the reduction of cholesterol level of hypertensive elderly at Community Health Center, Pacar Keling, Surabaya. Method: Quasy–experimental was used in this study. Sample comprised of 14 respondents who met the inclusion criteria. The independent variable was guava juice and the dependent vari...

  8. Applications of stable Isotope ratios determinations in fruit juice authentication

    International Nuclear Information System (INIS)

    Magdas, Dana Alina; Dehelean, Adriana; Voica, Cezara; Puscas, Romulus

    2010-01-01

    Full text: Adulteration of a product consists in making it impure by fraudulent addition of a foreign or inferior substance. The result is either an alteration of the product and of its quality or a falsification. The falsification is a voluntary act with the intention of abuse. The falsification may be more or less sophisticated and its sophistication as well as its costs increases with the improvement of analytical methods. Vacuum concentration with aroma does not affect the chemical composition of fruit juices and therefore the determination of deuterium (D) and oxygen-18 content in waters is the most confident procedure for differentiating between a natural single strength juice and a juice rediluted from a concentrate. This technique is based on the fact that when absorbed by a plant, the rainwater or the irrigation water is fractionated by evapotranspiration, and enriched in the heavy isotopes (deuterium and oxygen-18) with respect to the light isotope (hydrogen and oxygen-16, respectively). It is known that climatic conditions affect the isotope content of rain waters and therefore that of fruit juices waters: the warmer climate, the higher the deuterium and oxygen-18 contents in water. Rainwater and tap water have nearly the same isotopic content and the water of fruit juices derived from concentrate by dilution with tap water has an isotopic content close to that of tap water. This makes it easy to distinguish diluted concentrates from the isotopically more enriched water of authentic single strength juice. In this study, single strength juice, in Romanian fruits, were investigated by mean of stable isotope measurements (oxygen, hydrogen and carbon) in order to offer a discussion basis for the authenticity of some fruit juices currently available on Romanian market. (authors)

  9. Physicochemical and sensory characteristics of reduced sugar starfruit juice

    Directory of Open Access Journals (Sweden)

    Prasetijio, L.D.,

    2017-06-01

    Full Text Available The objective of this research was to study the physicochemical and sensory characteristics of reduced sugar starfruit juice. Cloudy starfruit juice produced by juicing of the edible part of starfruit, then the obtained filtrate was formulated with citric acid, Na- CMC and different ratio of cane sugar and sorbitol i.e. 10.0%:0.0%, 7.5%:2.5%, 5.0%:5.0%, 2.5%:5.0% and 0.0%:10.0% (% b/v. Physicochemical characteristics of the starfruit juice were total soluble solids in a range of 9.20 and 11.90%, the viscosity of 8.27 and 8.65 cP, pH of 3.56 and 3.63; and titratable acidity of 0.29 and 0.31%. Those cane sugar and sorbitol ratios affected significantly only on the total soluble solids. Based on the sensory evaluation, starfruit juice with cane sugar and sorbitol ratio of 7.50%:2.50% had the highest total preference scores of color, appearance, and taste. Colloidal stability of the starfruit juices during 10 days storage was in a range of 86.26% and 88.18%.

  10. Moro orange juice prevents fatty liver in mice.

    Science.gov (United States)

    Salamone, Federico; Li Volti, Giovanni; Titta, Lucilla; Puzzo, Lidia; Barbagallo, Ignazio; La Delia, Francesco; Zelber-Sagi, Shira; Malaguarnera, Michele; Pelicci, Pier Giuseppe; Giorgio, Marco; Galvano, Fabio

    2012-08-07

    To establish if the juice of Moro, an anthocyanin-rich orange, may improve liver damage in mice with diet-induced obesity. Eight-week-old mice were fed a high-fat diet (HFD) and were administrated water or Moro juice for 12 wk. Liver morphology, gene expression of lipid transcription factors, and metabolic enzymes were assessed. Mice fed HFD displayed increased body weight, insulin resistance and dyslipidemia. Moro juice administration limited body weight gain, enhanced insulin sensitivity, and decreased serum triglycerides and total cholesterol. Mice fed HFD showed liver steatosis associated with ballooning. Dietary Moro juice markedly improved liver steatosis by inducing the expression of peroxisome proliferator-activated receptor-α and its target gene acylCoA-oxidase, a key enzyme of lipid oxidation. Consistently, Moro juice consumption suppressed the expression of liver X receptor-α and its target gene fatty acid synthase, and restored liver glycerol-3-phosphate acyltransferase 1 activity. Moro juice counteracts liver steatogenesis in mice with diet-induced obesity and thus may represent a promising dietary option for the prevention of fatty liver.

  11. Effect of probiotics on patulin removal from synbiotic apple juice.

    Science.gov (United States)

    Zoghi, Alaleh; Khosravi-Darani, Kianoush; Sohrabvandi, Sara; Attar, Hosein; Alavi, Sayed Abolhasan

    2017-06-01

    Studies have reported the occurrence of the mycotoxin patulin in apple products. The aim of this study was to produce synbiotic apple juice and investigate the detoxification of patulin by Lactobacillus acidophilus and Lactobacillus plantarum as probiotic strains. The impact of seven process variables on efficiency of toxin removal was investigated using Plackett-Burman design and presence of the surface-layer proteins as binding site of probiotics to patulin was confirmed during 6 weeks of cold storage. Results showed that the removal of patulin by probiotic bacteria from apple juice depends significantly (P apple juice. In the best conditions, 91.23% of initial patulin concentration was removed from juice during 6 weeks refrigerated storage. No significant difference was observed in organoleptic properties of the synbiotic apple juice and raw sample. In the best condition reported in this study, contaminated synbiotic apple juice by patulin will be safe for consumers after the first day of probiotic inoculation. © 2016 Society of Chemical Industry. © 2016 Society of Chemical Industry.

  12. Study about the use of ionizing radiation to delay the putrefaction of strawberries 'Tioga'

    International Nuclear Information System (INIS)

    Ritacco, M.

    1988-01-01

    The influence of the ionizing radiation has been studied in fresh strawberries of the variety 'Tioga', with the purpose to extend its commercialization period. After the packaging in semi-permeable polyethylene, the material was procesed using 60 Co source of 400kCi. The strawberries were irradiated with a dose of 2kGy. The treated products and the unirradiated ones were stored refrigerated at 5 deg C with a relative humidity of 90 % and in absence of light. Each 4 days, chemical, organoleptics and microbiological studies were carried out and conditions of expense and transport post-irradiation were simulated. The results obtained would indicate the technological viability of ionizing radiations on this type of berries, keeping them in a good state during a period of 28 days post-treatment, the unirradiated material showed undiserable microbiological, organoleptics and chemical alterations after the 4th day of storage. (Autor) [es

  13. The stability of dichlofluanid and vinclozolin and their influence on the quality of strawberries.

    Science.gov (United States)

    Davídek, J; Hajslová, J; Svobodová, Z

    1981-05-01

    The content of dichlofluanid and vinclozolin found on strawberries treated with Euoparen and/or Ronilan, respectively, did not exceed the residue tolerance. Further decrease of the amount of these fungicides occurred during heatsterilisation of the fruit and storage of the products. The rate of decomposition of dichlofluanid and/or vincolozolin in model solutions (pH 3.0-6.0) followed pseudo-first-order kinetics. The taste and flavour of untreated fruit was preferred to those of strawberries treated with fungicides. There were differences in the content of reducing sugars, volatile fatty acids and titrable acidity in individual samples. Gas-chromatographic profiles of volatile substances isolated from treated and untreated berries also differed.

  14. Effect of pasteurisation and freezing method on bioactive compounds and antioxidant activity of strawberry pulp.

    Science.gov (United States)

    Gonçalves, Gilma Auxiliadora Santos; Resende, Nathane Silva; Carvalho, Elisângela Elena Nunes; Resende, Jaime Vilela de; Vilas Boas, Eduardo Valério de Barros

    2017-09-01

    This study evaluated the stability of strawberry pulp subjected to three factors, pasteurisation (pasteurised and unpasteurised), freezing method (static air and forced air) and storage time (0, 2, 4 and 6 months). Pasteurisation favoured vitamin C retention during storage but enhanced the total loss of phenolics without affecting anthocyanin levels. Freezing by forced air was more effective in retaining phenolics during the first 4 months of storage, although the freezing method did not affect the anthocyanin levels. Processing and storage reduced the levels of individual phenolics. Freezing by forced air was more effective than static air in retaining antioxidant activity of the pulp. Polyphenol oxidase and peroxidase enzyme levels were relatively stable and independent of pasteurisation, freezing and storage time. Even after 6 months of frozen storage, strawberry pulp is a significant source of nutrients and bioactive compounds and retains high antioxidant capacity independent of pasteurisation and freezing method.

  15. Vernalização em cinco cultivares de morangueiro Vernalization on five cultivars of strawberry

    Directory of Open Access Journals (Sweden)

    Marcelo Fontanetti Verdial

    2007-08-01

    Full Text Available A produção de morango é sazonal, e os melhores preços dos frutos são obtidos fora da estação. Buscando obter frutos fora da estação, o objetivo deste trabalho foi avaliar o efeito da vernalização em mudas de cinco cultivares de morangueiro. As mudas foram produzidas no sistema de vasos suspensos. O delineamento experimental utilizado foi blocos ao acaso em fatorial 5x2x4, com cinco cultivares ("IAC-Campinas", "Dover", "Sweet Charlie", "Cartuno" e "Oso Grande", dois tratamentos (com e sem vernalização das mudas e quatro tempos, com quatro repetições. Para vernalização, as mudas foram levadas para câmara fria à temperatura de 10+2°C e fotoperíodo de 8h de luz dia-1 durante 28 dias, e em seguida transplantadas. Foram avaliadas as percentagens de sobrevivência, florescimento, frutificação, emissão de estolhos, a massa e o número de frutos produzidos por planta. A sobrevivência de mudas não foi afetada pela vernalização. Houve efeito significativo no florescimento e na frutificação das plantas vernalizadas. O estolonamento de plantas foi mais precoce nas mudas vernalizadas. Para todas as cultivares e tratamentos, a produção de frutos foi insignificante e comercialmente inviável.The strawberry production is seasonal, and the best fruit prices are obtained during the off season. Seeking to get fruits off season, this research was aimed at evaluating the effect of the seedling vernalization of five strawberry cultivars. The strawberry seedling were produced in suspended pot system. The experimental design was is completely randomized blocks with the factorial design 5x2x4, with five strawberry cultivars (IAC-Campinas, Dover, Sweet Charlie, Cartuno and Oso Grande, two treatments (with and without strawberry runners vernalization and four times. For vernalization, the strawberry seedling was taken to cold chamber at 10±2°C, and photoperiod of 8h of light day-1 for 28 days, after this they were transplanted. The

  16. Extending shelf-life and economic evaluation of strawberry irradiated in Egypt

    International Nuclear Information System (INIS)

    Mahmoud, A.A.

    1988-01-01

    This study was made on ''Egypt's mega gamma I'' irradiator the radiation which is cobalt-60. The following dose was studied in detail 3.5 KGy, was compared with unirradiated sample was studied at the same time. The storage conditions for refrigeration were 4+-1 0 C. During storage periodic fruits were carried out as certain organoleptic properties. The refrigerated irradiated fruits have a shelf life of more than 30 days, whereas the unirradiated ones last only up to 14 days. On the other side the study of economic evaluation of irradiated strawberry showed that the activity of cobalt-60 source needed to satisfy requirement of gamma-irradiation processing of the annual strawberry production in Egypt has been figured a 0.563 Mci for a total activity

  17. Enhanced bioavailability of lycopene when consumed as cis-isomers from tangerine compared to red tomato juice, a randomized, cross-over clinical trial

    Science.gov (United States)

    Cooperstone, Jessica L.; Ralston, Robin A.; Riedl, Ken M.; Haufe, Thomas C.; Schweiggert, Ralf M.; King, Samantha A.; Timmers, Cynthia D.; Francis, David M.; Lesinski, Gregory B.; Clinton, Steven K.; Schwartz, Steven J.

    2015-01-01

    Scope Tangerine tomatoes (Solanum lycopersicum) are rich in tetra-cis-lycopene resulting from natural variation in carotenoid isomerase. Our objective was to compare the bioavailability of lycopene from tangerine to red tomato juice, and elucidate physical deposition forms of these isomers in tomatoes by light and electron microscopy. Methods and results Following a randomized crossover design, subjects (n=11, 6M/5F) consumed two meals delivering 10 mg lycopene from tangerine (94% cis) or red tomato juice (10% cis). Blood was sampled over 12 hours and triglyceride-rich lipoprotein fractions of plasma (TRLs) were isolated and analyzed using HPLC-DAD-MS/MS. Lycopene was crystalline in red tomato chromoplasts and globular in tangerine tomatoes. With tangerine tomato juice we observed a marked 8.5-fold increase in lycopene bioavailability compared to red tomato juice (PLycopene is markedly more bioavailable from tangerine than from red tomato juice, consistent with a predominance of cis-lycopene isomers and presence in chromoplasts in a lipid dissolved globular state. These results justify using tangerine tomatoes as a lycopene source in studies examining the potential health benefits of lycopene-rich foods. PMID:25620547

  18. Correlation between Strawberry (Fragaria ananassa Duch. Productivity and Photosynthesis-related Parameters under Various Growth Conditions

    Directory of Open Access Journals (Sweden)

    Hyo Gil Choi

    2016-10-01

    Full Text Available In the present study, we investigated changes in chlorophyll fluorescence, photosynthetic parameters and fruit yields, as well as fruit phytochemical accumulation of strawberry (Fragaria ananassa Duch. that had been cultivated in a greenhouse under different combinations of light intensity and temperature. In plants grown with low light (LL photosystem II chlorophyll fluorescence was found to increase as compared with those grown under high light (HL. When strawberry plants were grown with temperature higher than 5◦C in addition to LL, they showed decrease in non-photochemical quenching (NPQ, photochemical quenching (qP, as well as chlorophyll fluorescence decrease ratio (RFd when compared with other combinations of light and temperature. Moreover, fruit yield of strawberry was closely correlated with chlorophyll fluorescence-related parameters such as NPQ, qP, and RFd, but not with the maximum efficiency of PS II (Fv/Fm. Although plant groups grown under different combinations of light and temperature showed almost comparable levels of photosynthesis rates (Pr when irradiated with low-intensity light, they displayed clear differences when measured with higher irradiances. Plants grown under HL with temperature above 10◦C showed the highest Pr, in contrast to the plants grown under LL with temperature above 5◦C. When the stomatal conductance and the transpiration rate were measured, plants of each treatment showed clear differences even when analyzed with lower irradiances. We also found that fruit production during winter season was more strongly influenced by growth temperature than light intensity. We suggest that fruit productivity of strawberry is closely associated with chlorophyll fluorescence and photosynthesis-related parameters during cultivation under different regimes of temperature and light.

  19. Transcriptome profiling of postharvest strawberry fruit in response to exogenous auxin and abscisic acid.

    Science.gov (United States)

    Chen, Jingxin; Mao, Linchun; Lu, Wenjing; Ying, Tiejin; Luo, Zisheng

    2016-01-01

    Auxin and abscisic acid regulate strawberry fruit ripening and senescence through cross-talk of their signal transduction pathways that further modulate the structural genes related to physico-chemical properties of fruit. The physiological and transcriptomic changes in harvested strawberry fruits in responses to IAA, ABA and their combination were analyzed. Exogenous IAA delayed the ripening process of strawberries after harvest while ABA promoted the postharvest ripening. However, treatment with a combination of IAA and ABA did not slow down nor accelerate the postharvest ripening in the strawberry fruits. At the molecular level, exogenous IAA up regulated the expressions of genes related to IAA signaling, including AUX/IAA, ARF, TOPLESS and genes encoding E3 ubiquitin protein ligase and annexin, and down regulated genes related to pectin depolymerization, cell wall degradation, sucrose and anthocyanin biosyntheses. In contrast, exogenous ABA induced genes related to fruit softening, and genes involved in signaling pathways including SKP1, HSPs, CK2, and SRG1. Comparison of transcriptomes in responses to individual treatments with IAA or ABA or the combination revealed that there were cooperative and antagonistic actions between IAA and ABA in fruit. However, 17% of the differentially expressed unigenes in response to the combination of IAA and ABA were unique and were not found in those unigenes responding to either IAA or ABA alone. The analyses also found that receptor-like kinases and ubiquitin ligases responded to both IAA and ABA, which seemed to play a pivotal role in both hormones' signaling pathways and thus might be the cross-talk points of both hormones.

  20. Sawdust and Bark-Based Substrates for Soilless Strawberry Production: Irrigation and Electrical Conductivity Management.

    Science.gov (United States)

    Depardieu, Claire; Prémont, Valérie; Boily, Carole; Caron, Jean

    2016-01-01

    The objective of this work was to optimize a soilless growing system for producing bare-root strawberry transplants in three organic substrates. Three trials were conducted in the Quebec City area to determine the productivity potential of a peat-sawdust mixture (PS25) and an aged bark (AB) material compared to conventional coconut fiber (CF) substrate. A first experiment was carried out to define appropriate irrigation set points for each substrate that allowed optimal plant growth and fruit yields. For all substrates, wetter conditions (irrigation started at -1.0 kPa for CF; -1.5 kPa for AB and PS25, relative to -1.5 kPa for CF; -2.5 kPa for AB and PS25) enhanced plant growth and fruit production. The second trial was carried out to test the productivity potential for commercial production of the three substrates using high-tunnels. After the addition of an initial fertilizer application to PS25, we successfully established bare-root plants that gave similar fruit yields than those in CF and AB. The productivity potential of PS25 and AB were further confirmed during a third trial under greenhouse conditions. The critical factor for plant establishment in PS25 was attributed to consistent N, P and S immobilization by microorganisms, as well as the retention of other elements (Mg2+, K+) in the growth media. Taken together, our results showed that PS25 and AB are promising alternative substrates to coconut coir dust for strawberry cultivation. This paper also provides a useful guide for strawberry cultivation in Quebec, and suggests future research that might be conducted to optimize soilless systems for cold-climate strawberry production in Northern America.

  1. Sawdust and Bark-Based Substrates for Soilless Strawberry Production: Irrigation and Electrical Conductivity Management.

    Directory of Open Access Journals (Sweden)

    Claire Depardieu

    Full Text Available The objective of this work was to optimize a soilless growing system for producing bare-root strawberry transplants in three organic substrates. Three trials were conducted in the Quebec City area to determine the productivity potential of a peat-sawdust mixture (PS25 and an aged bark (AB material compared to conventional coconut fiber (CF substrate. A first experiment was carried out to define appropriate irrigation set points for each substrate that allowed optimal plant growth and fruit yields. For all substrates, wetter conditions (irrigation started at -1.0 kPa for CF; -1.5 kPa for AB and PS25, relative to -1.5 kPa for CF; -2.5 kPa for AB and PS25 enhanced plant growth and fruit production. The second trial was carried out to test the productivity potential for commercial production of the three substrates using high-tunnels. After the addition of an initial fertilizer application to PS25, we successfully established bare-root plants that gave similar fruit yields than those in CF and AB. The productivity potential of PS25 and AB were further confirmed during a third trial under greenhouse conditions. The critical factor for plant establishment in PS25 was attributed to consistent N, P and S immobilization by microorganisms, as well as the retention of other elements (Mg2+, K+ in the growth media. Taken together, our results showed that PS25 and AB are promising alternative substrates to coconut coir dust for strawberry cultivation. This paper also provides a useful guide for strawberry cultivation in Quebec, and suggests future research that might be conducted to optimize soilless systems for cold-climate strawberry production in Northern America.

  2. Some biochemical reactions of strawberry plants to infection with Botrytis cinerea and salicylic acid treatment

    Directory of Open Access Journals (Sweden)

    Urszula Małolepsza

    2013-12-01

    Full Text Available The reactions of strawberry plants to infection with B. cinerea and treatment with salicylic acid has been studied. Infection of leaves with B. cinerea resulted in early increases in active oxygen species generation, superoxide dismutase and peroxidase activities and phenolic compounds content. Some increases of the above reactions were noticed in plants treated with salicylic acid but not in the plants treated with SA and then later infected with B. cinerea.

  3. Modelling Fresh Strawberry Supply “From-Farm-to-Fork” as a Complex Adaptive Network

    OpenAIRE

    Engelseth, Per; Karlsen, Anniken; Verwaart, Tim

    2011-01-01

    The purpose of this study is to model and thereby enable simulation of the complete business entity of fresh food supply. A case narrative of fresh strawberry supply provides basis for this modelling. Lamming et al. (2000) point to the importance of discerning industry-specific product features (or particularities) regarding managing supply networks when discussing elements in “an initial classification of a supply network” while Fisher (1997) and Christopher et al. (2006, 2009) point to the ...

  4. Signum, a new fungicide with interesting properties in resistance management of fungal diseases in strawberries.

    Science.gov (United States)

    Hauke, K; Creemers, P; Brugmans, W; Van Laer, S

    2004-01-01

    Signum, a new fungicide developed by BASF, was applied during 6 successive years against fungal diseases in strawberries. The product is formulated as a water dispersible granule, containing 6.7 % pyraclostrobin and 26.7 % boscalid. Pyraclostrobin is similar in chemistry to other strobilurin fungicides like kresoxim-methyl and trifloxystrobin, registered for fruit disease control. Boscalid belongs to the class of carboxyanilides. Both components in the premix formulation combine two different biochemical modes of action in the fungal cell respiration. Therefore, this co-formulation gives a broad-spectrum activity and also a reduced resistance risk for different target pathogens. Botrytis cinerea is the most important disease on strawberry-fruits and thus the control of fruit rot is mainly focused on this fungus. In average over 6 years, Signum has not only given a very good control against Botrytis fruit rot, but it has also shown a high performance in the control of Colletotrichum. Besides, Signum provides good control of powdery mildew (Podosphaera aphanis) and limits the shift to other fruit rots like leather rot (Phytophthora cactorum and leak (Rhizopus, Mucor). The availability of several categories of fungicide families with a different mode of action gives opportunities in alternating different fungicides and is the best guarantee for a sustainable control of fruit rot in all kinds of strawberry production methods. Signum should be integrated in an overall disease management program. Trials, in which the applications of Signum were timed on disease forecasting, based on environmental factors favorable for Botrytis development, were very promising. This tool can also help in establishing the IPM-concept in the production of strawberries.

  5. Influence of NaCl salinity on growth analysis of strawberry cv. Camarosa

    Directory of Open Access Journals (Sweden)

    H. Mirdehghan

    2011-12-01

    Full Text Available In order to study of salinity effect on growth analysis of strawberry, a greenhouse experiment was conducted in Vali-e-Asr University of Rafsanjan in 2010. This study was carried out RCBD design with 4 replications to determine the influence of salinity (30, 60, 90 Mmol and control with distilled water on strawberry growth analysis. Results indicated that relative growth rate (RGR, crop growth rate (CGR, leaf area ratio (LAR and dry matter accumulation were decreased with increasing salinity. The lowest RGR, CGR and LAR were observed in 90 Mmol NaCl salinity. Results also indicated that maximum dry matter accumulations were observed in 1050, 1200 and 1400 degree days in 30, 60 and 90 Mmol NaCl salinity, respectively. Water salinity more than 30 Mmol NaCl L-1 will decreased fresh fruit yield more than 50 percent in hydroponics strawberry production. Dry mass partitioning in NaCl-stressed plants was in favor of crown and petioles and at expense of root, stem and leaf whereas leaf, stem and root DM progressively declined with an increase in salinity.

  6. The strawberry FaMYB1 transcription factor suppresses anthocyanin and flavonol accumulation in transgenic tobacco.

    Science.gov (United States)

    Aharoni, A; De Vos, C H; Wein, M; Sun, Z; Greco, R; Kroon, A; Mol, J N; O'Connell, A P

    2001-11-01

    Fruit ripening is characterized by dramatic changes in gene expression, enzymatic activities and metabolism. Although the process of ripening has been studied extensively, we still lack valuable information on how the numerous metabolic pathways are regulated and co-ordinated. In this paper we describe the characterization of FaMYB1, a ripening regulated strawberry gene member of the MYB family of transcription factors. Flowers of transgenic tobacco lines overexpressing FaMYB1 showed a severe reduction in pigmentation. A reduction in the level of cyanidin 3-rutinoside (an anthocyanin) and of quercetin-glycosides (flavonols) was observed. Expression of late flavonoid biosynthesis genes and their enzyme activities were adversely affected by FaMYB1 overexpression. Two-hybrid assays in yeast showed that FaMYB1 could interact with other known anthocyanin regulators, but it does not act as a transcriptional activator. Interestingly, the C-terminus of FaMYB1 contains the motif pdLNL(D)/(E)Lxi(G)/S. This motif is contained in a region recently proposed to be involved in the repression of transcription by AtMYB4, an Arabidopsis MYB protein. Our results suggest that FaMYB1 may play a key role in regulating the biosynthesis of anthocyanins and flavonols in strawberry. It may act to repress transcription in order to balance the levels of anthocyanin pigments produced at the latter stages of strawberry fruit maturation, and/or to regulate metabolite levels in various branches of the flavonoid biosynthetic pathway.

  7. Workload and awkward posture problems among small-scale strawberry farmers in Japan.

    Science.gov (United States)

    Kumudini, Ganga; Hasegawa, Tetsuya

    2009-12-01

    Farmers handle heavy workloads, often in awkward postures and experiencing some work related problems. Farmers perceive them as no more than inevitable consequences of farming activities. Although many problems can be prevented or reduced by simple and inexpensive modifications to work, these problems are increasing among farmers. The main focus of the paper was to investigate workload and awkward postures among strawberry farmers and suggest possible solutions to overcome the identified problems. Questionnaires, direct observations and intertwining methods were used to collect the data. Low-level strawberry beds and long working hours were recognized as critical factors that led to farmers' health problems including suffering from low back pain, heavy fatigue, unsteady feeling after work, etc. There was a substantial increase in fatigue in busy seasons compared with slack seasons. When compared with the other workers such as office, technical, sales and blue-collar workers, female farmers' general fatigue level was considerably high. Findings indicated that strawberry farming was a stressful occupation and farmers were strained under heavy workload, monotonous and repetitive work and poor working conditions with frequent fatigue symptoms and severe influence on health.

  8. Preparation and Application of LDPE/ZnO Nanocomposites for Extending Shelf Life of Fresh Strawberries.

    Science.gov (United States)

    Emamifar, Aryou; Mohammadizadeh, Mehri

    2015-12-01

    Strawberries have a very short post-harvest life mostly due to their relatively high water content, intense metabolic activity and susceptibility to microbial rot. Antimicrobial low-density polyethylene nanocomposite films containing ZnO nanoparticles at different mass fractions were prepared by melt mixing and followed by compression moulding using a hot press machine. Fresh strawberries were packed in nanocomposite films and stored at 4 °C. Their microbial stability, ascorbic acid content and titratable acidity were evaluated after 0, 4, 8, 12 and 16 days of storage. Microbial growth rate was significantly reduced up to 16 days as a result of the use of nanocomposite packaging material containing ZnO nanoparticles. By increasing the ZnO nanoparticle mass fraction to 5%, the antimicrobial activity of the film increased. All packages containing the ZnO nanoparticles kept the microbial load of fresh strawberries below the level that affects shelf life (5 log CFU/g) up to 16 days. The lowest degradation of ascorbic acid content (6.55 mg per 100 g), and loss of acidity (0.68%) were observed in packages containing 3% of ZnO nanoparticles with 10% polyethylene-grafted maleic anhydride.

  9. Abiotic Stress-Related Expressed Sequence Tags from the Diploid Strawberry Fragaria vesca f. semperflorens

    Directory of Open Access Journals (Sweden)

    Maximo. Rivarola

    2011-03-01

    Full Text Available Strawberry ( spp. is a eudicotyledonous plant that belongs to the Rosaceae family, which includes other agronomically important plants such as raspberry ( L. and several tree-fruit species. Despite the vital role played by cultivated strawberry in agriculture, few stress-related gene expression characterizations of this crop are available. To increase the diversity of available transcriptome sequence, we produced 41,430 L. expressed sequence tags (ESTs from plants growing under water-, temperature-, and osmotic-stress conditions as well as a combination of heat and osmotic stresses that is often found in irrigated fields. Clustering and assembling of the ESTs resulted in a total of 11,836 contigs and singletons that were annotated using Gene Ontology (GO terms. Furthermore, over 1200 sequences with no match to available Rosaceae ESTs were found, including six that were assigned the “response to stress” GO category. Analysis of EST frequency provided an estimate of steady state transcript levels, with 91 sequences exhibiting at least a 20-fold difference between treatments. This EST collection represents a useful resource to advance our understanding of the abiotic stress-response mechanisms in strawberry. The sequence information may be translated to valuable tree crops in the Rosaceae family, where whole-plant treatments are not as simple or practical.

  10. Biological parameters and fertility life table of Aphis forbesi Weed, 1889 (Hemiptera: Aphididae on strawberry

    Directory of Open Access Journals (Sweden)

    E. S. Araujo

    Full Text Available Abstract This study provides the first contribution of the biology and life table of Aphis forbesi Weed, 1889 (Hemiptera: Aphididae, an important strawberry pest throughout the world. This species lives in the crown and leaf petioles of the plant. It is difficulty to rear this species in laboratory due to protocooperation with ants observed only in the field. We studied the life cycle of A. forbesi on the leaves of the Albion strawberry cultivar at 25 ± 2 °C, 60 ± 10% relative humidity, and a 12-h photophase. The experiment was randomised with 100 replicates. The parameters of the fertility life table were calculated using TabVida. In the population studied, 25% and 46% had four and three instars, respectively. A mean of 1.43 nymphs per female per day was generated. The mean reproductive period was seven days and the mean longevity was 10 days. In every 11 days there is a generation of A. forbesi, where each female has the potential to generate between 6 to 9 individuals daily, increasing its population by 1.2 times. The average life cycle was 16.8 days. High viability observed in all instars and the resulting values of R0, rm and λ suggest that A. forbesi has the capacity to increase their numbers in a short period of time, while generating high populations in strawberry crops, requiring differential management.

  11. Glycosidically bound aroma compounds and impact odorants of four strawberry varieties.

    Science.gov (United States)

    Ubeda, Cristina; San-Juan, Felipe; Concejero, Belén; Callejón, Raquel M; Troncoso, Ana M; Morales, M Lourdes; Ferreira, Vicente; Hernández-Orte, Purificación

    2012-06-20

    This paper reports the determination of glycosidically bound aroma compounds and the olfactometric analysis in four strawberry varieties (Fuentepina, Camarosa, Candonga and Sabrina). Different hydrolytic strategies were also studied. The results showed significant differences between acid and enzymatic hydrolysis. In general terms, the greater the duration of acid hydrolysis, the higher was the content of norisoprenoids, volatile phenols, benzenes, lactones, Furaneol, and mesifurane. A total of 51 aglycones were identified, 38 of them unreported in strawberry. Olfactometric analyses revealed that the odorants with higher modified frequencies were Furaneol, γ-decalactone, ethyl butanoate, ethyl hexanoate, ethyl 3-methylbutanoate, diacetyl, hexanoic acid, and (Z)-1,5-octadien-3-one. This last compound, described as geranium/green/pepper/lettuce (linear retention index = 1378), was identified for the first time. Differences with regard to fruity, sweet, floral, and green aroma characters were observed among varieties. In Candonga and Fuentepina, the green character overpowered the sweet. In the other two strawberry varieties sweet attributes were stronger than the rest.

  12. Role of Brassinosteroid on Qualitative Characteristics Improvement of Strawberry Fruit cv. Paros

    Directory of Open Access Journals (Sweden)

    soheila mohammadrezakhani

    2017-02-01

    Full Text Available Introduction: Recently, strawberry growers have been mostly interested in growing cultivars for the fresh market because of its profitability, but on the other hand it requires more complicated technologies and well-educated workers. High quality of the fruit for the fresh market is an important factor attracts customers and determines their choice and prices. Fruit production cost for the fresh market needs to be calculated and efficient methods and technologies also should be taken into consideration. New environmentally friendly mineral-organic fertilizers can improve fruit quality and yield of dessert strawberry cultivars. The desired effects was obtained through the activity of fertilizer’s components, which very often belong to different groups of natural hormones, elicitors, vitamins, flavonoids, amino acids, etc. Numerous breeding programs have been aimed at improving strawberry taste and disease resistance. Three major components of fruit organoleptic quality are flavor, sweetness, and acidity. Several studies have been devoted to strawberry aroma. Fruit with intense flavor also have high titratable acidity and high soluble solids. Numerous studies have addressed strawberry sweetness and acidity. Fruit soluble solids, sugars, titratable acidity, and organic acids at maturity are quantitatively inherited. Moreover, there appears to be genetic variations for these fruit quality traits. Numerous biochemical changes are observed during strawberry development and especially during fruit ripening. The major soluble constituents of maturing and ripe strawberries are soluble sugars and organic acids. The major soluble sugars in strawberries are glucose, fructose, and sucrose. The major organic acid is citric acid. This acid contributes greatly to fruit titratable acidity, which declines gradually during fruit development. The sugar/ organic acid ratio is a major parameter of strawberry taste. Brassinosteroids (BRs are a class of poly hydroxyl

  13. Etiology and Population Genetics of Colletotrichum spp. Causing Crown and Fruit Rot of Strawberry.

    Science.gov (United States)

    Ureña-Padilla, A R; Mackenzie, S J; Bowen, B W; Legard, D E

    2002-11-01

    ABSTRACT Isolates of Colletotrichum spp. from diseased strawberry fruit and crowns were evaluated to determine their genetic diversity and the etiology of the diseases. Isolates were identified to species using polymerase chain reaction primers for a ribosomal internal transcribed spacer region and their pathogenicity was evaluated in bioassays. Isolates were scored for variation at 40 putative genetic loci with random amplified polymorphic DNA and microsatellite markers. Only C. acutatum was recovered from diseased fruit. Nearly all isolates from crowns were C. gloeosporioides. In crown bioassays, only isolates of C. gloeosporioides from strawberry caused collapse and death of plants. A dendrogram generated from the genetic analysis identified several primary lineages. One lineage included isolates of C. acutatum from fruit and was characterized by low diversity. Another lineage included isolates of C. gloeosporioides from crowns and was highly polymorphic. The isolates from strawberry formed distinctive clusters separate from citrus isolates. Evaluation of linkage disequilibrium among polymorphic loci in isolates of C. gloeosporioides from crowns revealed a low level of disequilibrium as would be expected in sexually recombining populations. These results suggest that epidemics of crown rot are caused by Glomerella cingulata (anamorph C. gloeosporioides) and that epidemics of fruit rot are caused by C. acutatum.

  14. Detection of irradiated strawberries by identifying ESR peak of irradiated cellulose component

    International Nuclear Information System (INIS)

    Goto, Michiko; Tanabe, Hiroko

    2002-01-01

    The method of detecting low-dose irradiated strawberries by identifying ESR peak of irradiated cellulose component was studied. Ratio of peak height (S) of high magnetic field cellulose component, and noise width (N) of either irradiated or unirradiated seeds of strawberries were compared. In this study, sample was identified to be irradiated when S/N ratio of ESR spectrum of 4 min. sweep time was above 0.7. In the case of S/N ratio below 0.7, when the S/N ratio of integrated ESR spectrum, obtained from measuring 10 times with 1 min. sweep time was above 1.0, the sample was identified to be irradiated. The result suggests that S/N ratio is a good marker to detect the irradiation. The strawberries irradiated above 0.5kGy was able to be detected after 3 days storage at room temperature, after 21 days refrigeration and after 60 days freezing, respectively. (author)

  15. Irradiation and evolution of the gray rot botrytis cinerea at the strawberry plant

    International Nuclear Information System (INIS)

    Labidi, Arbia

    2005-01-01

    Strawberry was introduced since french colonization in tunisia as one of plants cultivated. At the end of the 1970's the strawberries (Fragaria ananassa) was developed in area of Cap Bon. grey mold, caused by botrytis cinerea is by far the most widespread and serious of strawberry fruit diseases and an ever-present threat to the crop. A wide variety of symptoms is caused by B. Cinerea such as a rot on fruit and blight on leaves. this fungus causes domages bith in the field and during storage. In order to reduce severity of grey mold, biological control in field and radiation on post-harvest are developed. The objective of this study was to determine the antagonism of some microorganisms against B.Cinerea such as Trichoderma and Bacillus in greenhouse. On the other hand we tested the efficacity of biological products such as Prev-Am and BM 86on enhancing plant defense. For the post-harvest studies, the goal is to provide a wear tool to manage better the fungus by gamma rays radiation. (author). 29 refs

  16. Influence of Irradiated Chicken Manure on Productivity and Fruit Quality of Strawberries

    International Nuclear Information System (INIS)

    Fath El-Bab, T.Sh.

    2014-01-01

    A field experiment was carried out on Strawberry fruits (Fragaria×ananassa) cv. camarosa at Atomic Energy Authority, Experimental farm, Inshas, Egypt during the two successive seasons 2011 and 2012. Chicken manure at rates of 15 and 30 m 3 fed -1 were irradiated with 10 KGy gamma were applied in combination with 206 N + 31 P 2 O 5 + 240 K 2 O unit fed -1 . Untreated control but fertilized with 206 N + 31 P 2 O 5 + 240 K 2 O unit fed-1was also included. Generally chicken manure rates significantly increased vegetative growth, and total yield quality of strawberry fruits. The superiority data with 30 m 3 fed -1 irradiated chicken manure was observed on strawberry of plant height, number of leaves plant, and number of crowns plant, root length and dry weight of shoots. Also total soluble solids and acidity, vitamin C, total sugars and anthocyanin content were significantly increased comparable to control. Nitrogen, phosphorus and potassium contents non significantly affected most of treatments except the combined treatment of chicken manure at rate 30 m 3 fed -1 and 206 N + 31 P 2 O 5 + 240 K 2 O unit fed -1 that induced the best results. This was true at the 2nd season. Moreover these results were nearly closed those of irradiated dry chicken manure at rate of 30 m 3 fed -1 plus 206 N + 31 P 2 O 5 + 240 K 2 O unit fed -1 , for both seasons

  17. Preparation and Application of LDPE/ZnO Nanocomposites for Extending Shelf Life of Fresh Strawberries

    Directory of Open Access Journals (Sweden)

    Mehri Mohammadizadeh

    2015-01-01

    Full Text Available Strawberries have a very short post-harvest life mostly due to their relatively high water content, intense metabolic activity and susceptibility to microbial rot. Antimicrobial low-density polyethylene nanocomposite films containing ZnO nanoparticles at different mass fractions were prepared by melt mixing and followed by compression moulding using a hot press machine. Fresh strawberries were packed in nanocomposite films and stored at 4 °C. Their microbial stability, ascorbic acid content and titratable acidity were evaluated after 0, 4, 8, 12 and 16 days of storage. Microbial growth rate was significantly reduced up to 16 days as a result of the use of nanocomposite packaging material containing ZnO nanoparticles. By increasing the ZnO nanoparticle mass fraction to 5 %, the antimicrobial activity of the film increased. All packages containing the ZnO nanoparticles kept the microbial load of fresh strawberries below the level that affects shelf life (5 log CFU/g up to 16 days. The lowest degradation of ascorbic acid content (6.55 mg per 100 g, and loss of acidity (0.68 % were observed in packages containing 3 % of ZnO nanoparticles with 10 % polyethylene-grafted maleic anhydride.

  18. Expression Profiling of Strawberry Allergen Fra a during Fruit Ripening Controlled by Exogenous Auxin.

    Science.gov (United States)

    Ishibashi, Misaki; Yoshikawa, Hiroki; Uno, Yuichi

    2017-06-02

    Strawberry fruit contain the allergenic Fra a proteins, members of the pathogenesis-related 10 protein family that causes oral allergic syndrome symptoms. Fra a proteins are involved in the flavonoid biosynthesis pathway, which might be important for color development in fruits. Auxin is an important plant hormone in strawberry fruit that controls fruit fleshiness and ripening. In this study, we treated strawberry fruits with exogenous auxin or auxin inhibitors at pre- and post-harvest stages, and analyzed Fra a transcriptional and translational expression levels during fruit development by real-time PCR and immunoblotting. Pre-harvest treatment with 1-naphthaleneacetic acid (NAA) alone did not affect Fra a expression, but applied in conjunction with achene removal NAA promoted fruit pigmentation and Fra a protein accumulation. The response was developmental stage-specific: Fra a 1 was highly expressed in immature fruit, whereas Fra a 2 was expressed in young to ripe fruit. In post-harvest treatments, auxin did not contribute to Fra a induction. Auxin inhibitors delayed fruit ripening; as a result, they seemed to influence Fra a 1 expression. Thus, Fra a expression was not directly regulated by auxin, but might be associated with the ripening process and/or external factors in a paralog-specific manner.

  19. Strawberry-Based Cosmetic Formulations Protect Human Dermal Fibroblasts against UVA-Induced Damage

    Directory of Open Access Journals (Sweden)

    Massimiliano Gasparrini

    2017-06-01

    Full Text Available Extreme exposure of skin to Ultraviolet A (UVA-radiation may induce a dysregulated production of reactive oxygen species (ROS which can interact with cellular biomolecules leading to oxidative stress, inflammation, DNA damage, and alteration of cellular molecular pathways, responsible for skin photoaging, hyperplasia, erythema, and cancer. For these reasons, the use of dietary natural bioactive compounds with remarkable antioxidant activity could be a strategic tool to counteract these UVA-radiation-caused deleterious effects. Thus, the purpose of the present work was to test the efficacy of strawberry (50 μg/mL-based formulations supplemented with Coenzyme Q10 (100 μg/mL and sun protection factor 10 in human dermal fibroblasts irradiated with UVA-radiation. The apoptosis rate, the amount of intracellular reactive oxygen species (ROS production, the expression of proteins involved in antioxidant and inflammatory response, and mitochondrial functionality were evaluated. The results showed that the synergic topical use of strawberry and Coenzyme Q10 provided a significant (p < 0.05 photoprotective effect, reducing cell death and ROS, increasing antioxidant defense, lowering inflammatory markers, and improving mitochondrial functionality. The obtained results suggest the use of strawberry-based formulations as an innovative, natural, and useful tool for the prevention of UVA exposure-induced skin diseases in order to decrease or substitute the amount of synthetic sunscreen agents.

  20. Comparative genomic sequence analysis of strawberry and other rosids reveals significant microsynteny

    Directory of Open Access Journals (Sweden)

    Abbott Albert

    2010-06-01

    Full Text Available Abstract Background Fragaria belongs to the Rosaceae, an economically important family that includes a number of important fruit producing genera such as Malus and Prunus. Using genomic sequences from 50 Fragaria fosmids, we have examined the microsynteny between Fragaria and other plant models. Results In more than half of the strawberry fosmids, we found syntenic regions that are conserved in Populus, Vitis, Medicago and/or Arabidopsis with Populus containing the greatest number of syntenic regions with Fragaria. The longest syntenic region was between LG VIII of the poplar genome and the strawberry fosmid 72E18, where seven out of twelve predicted genes were collinear. We also observed an unexpectedly high level of conserved synteny between Fragaria (rosid I and Vitis (basal rosid. One of the strawberry fosmids, 34E24, contained a cluster of R gene analogs (RGAs with NBS and LRR domains. We detected clusters of RGAs with high sequence similarity to those in 34E24 in all the genomes compared. In the phylogenetic tree we have generated, all the NBS-LRR genes grouped together with Arabidopsis CNL-A type NBS-LRR genes. The Fragaria RGA grouped together with those of Vitis and Populus in the phylogenetic tree. Conclusions Our analysis shows considerable microsynteny between Fragaria and other plant genomes such as Populus, Medicago, Vitis, and Arabidopsis to a lesser degree. We also detected a cluster of NBS-LRR type genes that are conserved in all the genomes compared.

  1. Epidemiology and Control of Strawberry Bacterial Angular Leaf Spot Disease Caused by Xanthomonas fragariae

    Directory of Open Access Journals (Sweden)

    Da-Ran Kim

    2016-08-01

    Full Text Available Strawberry bacterial angular leaf spot (ALS disease, caused by Xanthomonas fragariae has become increasingly problematic in the strawberry agro-industry. ALS causes small angular water-soaked lesions to develop on the abaxial leaf surface. Studies reported optimum temperature conditions for X. fragariae are 20°C and the pathogen suffers mortality above 32°C. However, at the nursery stage, disease symptoms have been observed under high temperature conditions. In the present study, results showed X. fragariae transmission was via infected maternal plants, precipitation, and sprinkler irrigation systems. Systemic infections were detected using X. fragariae specific primers 245A/B and 295A/B, where 300-bp and 615-bp were respectively amplified. During the nursery stage (from May to August, the pathogen was PCR detected only in maternal plants, but not in soil or irrigation water through the nursery stage. During the cultivation period, from September to March, the pathogen was detected in maternal plants, progeny, and soil, but not in water. Additionally, un-infected plants, when planted with infected plants were positive for X. fragariae via PCR at the late cultivation stage. Chemical control for X. fragariae with oxolinic acid showed 87% control effects against the disease during the nursery period, in contrast to validamycin-A, which exhibited increased efficacy against the disease during the cultivation stage (control effect 95%. To our knowledge, this is the first epidemiological study of X. fragariae in Korean strawberry fields.

  2. Fuzzy classification for strawberry diseases-infection using machine vision and soft-computing techniques

    Science.gov (United States)

    Altıparmak, Hamit; Al Shahadat, Mohamad; Kiani, Ehsan; Dimililer, Kamil

    2018-04-01

    Robotic agriculture requires smart and doable techniques to substitute the human intelligence with machine intelligence. Strawberry is one of the important Mediterranean product and its productivity enhancement requires modern and machine-based methods. Whereas a human identifies the disease infected leaves by his eye, the machine should also be capable of vision-based disease identification. The objective of this paper is to practically verify the applicability of a new computer-vision method for discrimination between the healthy and disease infected strawberry leaves which does not require neural network or time consuming trainings. The proposed method was tested under outdoor lighting condition using a regular DLSR camera without any particular lens. Since the type and infection degree of disease is approximated a human brain a fuzzy decision maker classifies the leaves over the images captured on-site having the same properties of human vision. Optimizing the fuzzy parameters for a typical strawberry production area at a summer mid-day in Cyprus produced 96% accuracy for segmented iron deficiency and 93% accuracy for segmented using a typical human instant classification approximation as the benchmark holding higher accuracy than a human eye identifier. The fuzzy-base classifier provides approximate result for decision making on the leaf status as if it is healthy or not.

  3. Influence of processing on the volatile profile of strawberry spreads made with isomaltulose.

    Science.gov (United States)

    Peinado, I; Rosa, E; Heredia, A; Escriche, I; Andrés, A

    2013-05-01

    A new strawberry spread formulated with fructose and isomaltulose (replacing sucrose partially or totally) and a high percentage of fruit was developed in line with the new trend of healthier products. This work studies the influence of some process variables (percentage of sugar, pectin and citric acid, and time of thermal treatment) on the volatile profile of these spreads with different formulations. The ripeness of the raw strawberries influences the concentrations of some of the compounds in the spreads, such as isobutyl acetate, butyl butyrate, 3-hexen-1-yl acetate or propan-2-ol. The process conditions have an important effect on the volatile profiles. Most of the esters and alcohols decreased whereas 13 new compounds appear, mostly furans (furfural, 2-acetylfurane, 5-methyl furfural, mesifurane) and aldehydes (octanal, nonanal, decanal and benzaldeyhde). In general, the spreads formulated with sucrose-isomaltulose that contained higher levels of pectin and citric acid gave better results in the preservation of the original aromatic compounds in raw strawberries. Copyright © 2012 Elsevier Ltd. All rights reserved.

  4. Cancer-Related Constituents of Strawberry Jam as Compared with Fresh Fruit

    Directory of Open Access Journals (Sweden)

    Gema Flores

    2016-01-01

    Full Text Available The health awareness recently shown by consumers has led to a demand for health beneficial products. In particular, researchers are currently focusing their studies on the search for foods for cancer prevention activity. In the present work, we study comparatively the effect of two different processing methods on the contents of phenolic compounds (i.e., ellagic acid, myricetin, quercetin and kaempferol with antioxidant and antitumor properties in strawberry jams. In turn, the results obtained were compared with those of unprocessed fruit. Additionally carcinogenic heat-induced compounds formed by the two jam making methods were evaluated. Decreases of total ellagic acid from 138.4 µg/g to 86.5 µg/g were measured in jam as compared with the intact fruit. Even higher losses of up to 90% of total flavonols were found in strawberry after the jam-making process. A comparison between the two processing methods proved shorter heating periods (around 60 min even at temperatures as high as 100 °C enabled losses of antioxidant phenolics to be minimized. Carcinogenic heat-induced volatile compounds, mainly Maillard reaction products, were formed as a result of thermal treatment during jam processing. However, shorter heating periods also helped reduce the formation of these harmful compounds. These results are deeply discussed. From a practical standpoint, the processing conditions here proposed can be used by industry to obtain strawberry jam with higher content of antioxidant flavonoids and, at the same time, reduced amounts of carcinogenic compounds.

  5. Apple juice inhibits human low density lipoprotein oxidation.

    Science.gov (United States)

    Pearson, D A; Tan, C H; German, J B; Davis, P A; Gershwin, M E

    1999-01-01

    Dietary phenolic compounds, ubiquitous in vegetables and fruits and their juices possess antioxidant activity that may have beneficial effects on human health. The phenolic composition of six commercial apple juices, and of the peel (RP), flesh (RF) and whole fresh Red Delicious apples (RW), was determined by high performance liquid chromatography (HPLC), and total phenols were determined by the Folin-Ciocalteau method. HPLC analysis identified and quantified several classes of phenolic compounds: cinnamates, anthocyanins, flavan-3-ols and flavonols. Phloridzin and hydroxy methyl furfural were also identified. The profile of phenolic compounds varied among the juices. The range of concentrations as a percentage of total phenolic concentration was: hydroxy methyl furfural, 4-30%; phloridzin, 22-36%; cinnamates, 25-36%; anthocyanins, n.d.; flavan-3-ols, 8-27%; flavonols, 2-10%. The phenolic profile of the Red Delicious apple extracts differed from those of the juices. The range of concentrations of phenolic classes in fresh apple extracts was: hydroxy methyl furfural, n.d.; phloridzin, 11-17%; cinnamates, 3-27%; anthocyanins, n.d.-42%; flavan-3-ols, 31-54%; flavonols, 1-10%. The ability of compounds in apple juices and extracts from fresh apple to protect LDL was assessed using an in vitro copper catalyzed human LDL oxidation system. The extent of LDL oxidation was determined as hexanal production using static headspace gas chromatography. The apple juices and extracts, tested at 5 microM gallic acid equivalents (GAE), all inhibited LDL oxidation. The inhibition by the juices ranged from 9 to 34%, and inhibition by RF, RW and RP was 21, 34 and 38%, respectively. Regression analyses revealed no significant correlation between antioxidant activity and either total phenolic concentration or any specific class of phenolics. Although the specific components in the apple juices and extracts that contributed to antioxidant activity have yet to be identified, this study

  6. Comparative study of aromatic compounds in fruit wines from raspberry, strawberry, and mulberry in central Shaanxi area

    Directory of Open Access Journals (Sweden)

    Yiming Feng

    2015-11-01

    Full Text Available Background: Although grape wines have firmly dominated the production and consumption markets of fruit wines, raspberry, strawberry, and mulberry have been utilized to make wines because of their joyful aroma and high contents of polyphenolic phytochemicals and essential fatty acids. However, little is known about aromatic compounds of the wines produced from these three fruits. Methods: The aromatic composition of fruit wines produced from raspberry, strawberry, mulberry, and red grape was analyzed by GC-MS. Odor activity values (OAVs and relative odor contributions (ROCs were used to estimate the sensory contribution of the aromatic compounds to the overall flavor of the wines. Results: In strawberry, raspberry, and mulberry wines, 27, 30, and 31 odorants were detected, respectively. Alcohols formed the most abundant group, followed by esters and acids. The grape wine contained a wider variety (16 types of alcohols, and 4-methyl-2-pentanol and 2,3-butanediol were not present in the three fruit wines. The quantity of esters in raspberry (1.54% and mulberry wines (2.08% were higher than those of strawberry wine (0.78%, and mulberry wine contained more types of esters. There were no significant differences of acids between the three fruit wines and the control wine. In addition, 2-heptanone, 2-octanone, 2-nonanone, and 2-undecanone were unique to raspberry wine, and nonanal was present only in mulberry wine. The indistinguishable aroma of the three fruit wines was attributed to the dominance of fruity and floral odor components derived from ethyl esters of fatty acids and their contributions to the global aroma of the three fruit wines. Conclusion: The present study demonstrated that there were significant differences in the volatile components of fruit wines made from raspberry, strawberry, and mulberry. The aroma compounds were more abundant in the raspberry and mulberry wines than in the strawberry wine, but the quality of strawberry wine was

  7. Microfiltration of red berry juice with thread filters: Effects of temperature, flow and filter pore size

    DEFF Research Database (Denmark)

    Bagger-Jørgensen, Rico; Casani, Sandra Dobon; Meyer, Anne Boye Strunge

    2002-01-01

    ) on the transmembrane pressure, juice turbidity, protein, sugar, and total phenols levels was evaluated in a lab scale microfiltration unit employing statistically designed factorial experiments. Thread microfiltration reduced significantly the turbidity of both juices. For blackcurrant juice, in all experiments......, the turbidity was immediately reduced to the level required for finished juice without compromising either the protein, the sugar or the phenols content. High flow rates increased the turbidity in blackcurrant juice, but did not affect cherry juice quality. Filtomat(R) thread microfiltration therefore appears...

  8. Effect of continuous ohmic heating to inactivate Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes in orange juice and tomato juice.

    Science.gov (United States)

    Lee, S-Y; Sagong, H-G; Ryu, S; Kang, D-H

    2012-04-01

    The purpose of this study was to investigate the efficacy of continuous ohmic heating for reducing Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes in orange juice and tomato juice. Orange juice and tomato juice were treated with electric field strengths in the range of 25-40 V cm(-1) for different treatment times. The temperature of the samples increased with increasing treatment time and electric field strength. The rate of temperature change for tomato juice was higher than for orange juice at all voltage gradients applied. Higher electric field strength or longer treatment time resulted in a greater reduction of pathogens. Escherichia coli O157:H7 was reduced by more than 5 log after 60-, 90- and 180-s treatments in orange juice with 40, 35 and 30 V cm(-1) electric field strength, respectively. In tomato juice, treatment with 25 V cm(-1) for 30 s was sufficient to achieve a 5-log reduction in E. coli O157:H7. Similar results were observed in Salm. Typhimurium and L. monocytogenes. The concentration of vitamin C in continuous ohmic heated juice was significantly higher than in conventionally heated juice (P pasteurize fruit and vegetable juices in a short operating time and that the effect of inactivation depends on applied electric field strengths, treatment time and electric conductivity. © 2012 The Authors. Journal of Applied Microbiology © 2012 The Society for Applied Microbiology.

  9. Chemical and antioxidant properties of snake tomato (Trichosanthes cucumerina) juice and Pineapple (Ananas comosus) juice blends and their changes during storage.

    Science.gov (United States)

    Bamidele, Oluwaseun P; Fasogbon, Mofoluwaso B

    2017-04-01

    Juice blends made from the mixture of snake tomato (Trichosanthes cucumerina) and Pineapple (Ananas comosus) fruits were analyzed for pH, antioxidant properties, total titratable acidity, vitamin C, lycopene and total phenolic contents after different blend ratios were made. The addition of snake tomato juice increased the vitamin C, total carotene, lycopene and antioxidant properties of the juice blends. The radical scavenging properties of juice blends containing a higher ratio of snake tomato were higher and samples stored at room temperature (29°C) showed an increase in antioxidant properties compared to samples stored at 4°C. In conclusion, snake tomato juice up to 50% may be added to Pineapple juice to make a healthy juice blend. Copyright © 2016 Elsevier Ltd. All rights reserved.

  10. Fungal biomass production from coffee pulp juice

    Energy Technology Data Exchange (ETDEWEB)

    De Leon, R.; Calzada, F.; Herrera, R.; Rolz, C.

    1980-01-01

    Coffee pulp or skin represents about 40% of the weight of the fresh coffee fruit. It is currently a waste and its improper handling creates serious pollution problems for coffee producing countries. Mechanical pressing of the pulp will produce two fractions: coffee pulp juice (CPJ) and pressed pulp. Aspergillus oryzae, Trichoderma harzianum, Penicillium crustosum and Gliocladium deliquescens grew well in supplemented CPJ. At shake flask level the optimum initial C/N ratio was found to be in the range of 8 to 14. At this scale, biomass values of up to 50 g/l were obtained in 24 hours. Biomass production and total sugar consumption were not significantly different to all fungal species tested at the bench-scale level, even when the initial C/N ratio was varied. Best nitrogen consumption values were obtained when the initial C/N ratio was 12. Maximum specific growth rates occurred between 4-12 hours for all fungal species tested. (Refs. 8).

  11. BOL and EOL Characterization of Azur 3G Lilt Solar Cells for ESA Juice Mission

    Directory of Open Access Journals (Sweden)

    Khorenko Victor

    2017-01-01

    Full Text Available In the present paper, we describe the results of electrical characterization of AZUR SPACE triple-junction solar cells at a sun light intensity of 3.7% AM0 and temperatures down to −150°C. At these conditions, which are relevant for the anticipated ESA JUICE mission, the cell efficiency reaches 33.5 % at BOL. Special attention has been paid to the establishing of an in-situ characterization procedure for defining EOL cell characteristics after electron and proton irradiation at low temperature low intensity condition. It was shown that solar cells irradiated at low temperature exhibit a strong recovery effect within short time after stopping the irradiation whereas the absolute value of the recovery depends on the irradiation fluence and particle type. Further on, it was demonstrated that the degradation of the maximum power, Pmp, is much stronger than the degradation of Isc and Voc values. Experimentally defined remaining factors for electron and proton irradiation and the quantification of the observed recovery effects allow a realistic prediction of the solar cell performance at JUICE mission conditions and are essential for the planned solar cell qualification activities.

  12. Effect of strawberry (Fragaria x ananasa) as antidepresant activity on mice induced by stress

    Science.gov (United States)

    Hazar, Siti; Fitri, Lulu L.

    2015-09-01

    Depression is a physiological disorder on the brain and may induce the reduction levels of monoamine neurotransmitters, serotonin and the increased levels of stress hormone, corticosterone. The use of antidepressant drugs causing side effect, therefore natural agents are used as alternative therapy. The objectives of this study are to determine the effect of strawberries in the murine experiments in increasing serotonin level as well as decreasing in the immobility time of mice on Forced Swimming Task (FST). Forty-eight male outbreed of 4 weeks old mice strain Swiss Webster with average body weight of 18-22 grams were divided into six groups of eight mice, as follows: (1) non-stressed, (2) Chronic Mild Stressed (CMS), (3) strawberry extract (with dose of 464.1 mg/kg) and CMS, (4) strawberry extract (with dose of 928.2 mg/kg) and CMS, (5) fisetin (with a dose of 10 mg/kg) and CMS, and (6) amitriptyline (an antidepressant, with a dose of 3.25 mg/kg) and CMS as a comparison group. Chronic Mild Stress (CMS) method were used as induction of stress consisted of seven different stressors and assigned randomly for 35 days. Provision of treatment was made during the 14 days preparations on day 22 to day 35. At the end of treatments, all mice were assigned on FST test for immobility time measurements. Next, all mice were decapitated and the brains were isolated. Serotonin levels were measured using High Performance Liquid Chromatography (HPLC) with UV-visible light detector. The results showed that the immobility time of group mice which were given by the strawberries (928.2 mg/kg) and fisetin had shorter duration than the positive control group. Furthermore, the level of serotonin in the test group increased compared to CMS group. Corticosterone levels of treatment mice were increased significantly compared to non-stressed mice. Therefore, it can be concluded that strawberries are able to improve depressive symptoms by decreasing immobility time and increasing levels of

  13. Identification of specific microorganisms in fresh squeezed street vended fruit juices

    Directory of Open Access Journals (Sweden)

    K Sahithi Reddy

    2016-01-01

    Full Text Available Introduction: In developing country like India, street foods such as salads and fresh cut fruits are widely consumed. Among all street foods, fruit juices are common beverages, consumed more because of higher consumer preference both in terms of taste and health. Moreover, there is a dearth of Indian studies on contamination of street vended fruit juices. Aim: To determine the pH and specific microorganisms in freshly squeezed street vended fruit juices. Materials and Methods: Four fruit juices i.e., Grapes, Sweet Lime, Pineapple and Sapota were chosen for the study. Juices were collected in summer season in months between April and June 2013. Ten samples of 50 ml each fruit juice was collected in sterile bottles from various street vendors of Dilshuknagar area of Hyderabad city. Transportation of samples to Food Toxicology laboratory, National Institute of Nutrition was done in the ice box and processing was done within 2–4 h. Results: All juices showed bacterial contamination except one sample of grape juice. Pineapple juice samples showed the high bacterial contamination with all samples positive for fecal coliforms and Shigella spp. (100%. Salmonella spp. was detected only in one sample of Sapota juice (10%. Significant difference among fruit juices for prevalence of microorganisms was seen only for Escherichia coli (P = 0.03 with least count in Grape juice (20%. Conclusion: Freshly squeezed street vended fruit juices were contaminated with pathogenic bacteria, which significantly attributed to public health problem.

  14. [Magnetic solid phase extraction combined with gas chromatography-flame photometric detection for the determination of organophosphorus pesticides in juice samples].

    Science.gov (United States)

    Huang, Qian; He, Man; Chen, Beibei; Hu, Bin

    2014-10-01

    A novel method for the determination of organophosphorous pesticides (OPPs) in fresh juice samples was developed. Fe3O4 @ P (St-co-MAA) magnetic microparticles were synthesized and modified with styrene (St) and methacrylic acid (MAA) by coating St and MAA on magnetic particles and characterized by a series of techniques. The results indicated that Fe3 O4 magnetic nanoparticles (MNPs) have been successfully modified with St and MAA. Based on the prepared FeO4 @ P (St-co-MAA) magnetic microparticles, a novel method of magnetic solid phase extraction (MSPE)-gas chromatography (GC)-flame photometric detection (FPD) was developed for the determination of OPPs. The extraction/desorption conditions of MSPE were optimized, and the analytical performance was evaluated under the optimal conditions. The limits of detection (LODs, S/N = 3) for target OPPs were in the range of 0.013-0.305 μg/L with the RSDs (n = 7) ranging from 3.1% to 8.8%. The enrichment factors varied from 406 to 951. The linear ranges were over three orders of magnitudes (R2 > 0.99) and the reproducibilities were 7.4%-14.5% (n = 5). Finally, the proposed MSPE-GC-FPD method was successfully applied to the analysis of the five OPPs in fresh tomato and strawberry juice samples, with the recoveries of target OPPs in the range of 85.4%-118.9% for the spiked samples. The proposed MSPE-GC-FPD method is featured with low cost, fast separation and high enrichment factor.

  15. Carbohydrate absorption from one serving of fruit juice in young children: age and carbohydrate composition effects.

    Science.gov (United States)

    Nobigrot, T; Chasalow, F I; Lifshitz, F

    1997-04-01

    To test the hypotheses that: the efficiency of carbohydrate absorption in childhood increases with age, and decreased carbohydrate absorption occurs more frequently with juices containing more fructose than glucose and/or sorbitol than with juices which contain equal amounts of fructose and glucose and are sorbitol-free. One hundred and four healthy children were recruited from the Ambulatory Center at Maimonides Children's Center. They were assigned to one of three age groups: approximately 1, 3 and 5 years of age. Each child received one age-specific dose (by randomization) of one of four juices: a) pear juice which contains fructose in excess to glucose and a large amount of sorbitol; b) apple juice which is similar to pear juice in its fructose to glucose ratio but contains four times less sorbitol than pear juice; c) white grape juice or d) purple grape juice both of which contain equal amounts of fructose and glucose and are sorbitol-free. Breath hydrogen excretion (BH2) was utilized as the index of carbohydrate absorption. It was measured in fasting children and at 30-minute intervals for 3 hours after drinking the single serving of juice. Multiple breath hydrogen related parameters were quantified and results were expressed as: BH2 peak, area under the curve, and degree of carbohydrate malabsorption. After the test, parents completed a questionnaire and recorded signs and symptoms of intestinal malabsorption for 24 hours. Pear juice related BH2 levels were significantly higher among children 1 and 3 years of age as compared to the levels achieved after the other juices. Apple juice related BH2 levels were significantly higher only among the youngest age group of children. There was no significant difference in carbohydrate absorption among the 5 year old children regardless of the juice consumed. Incomplete carbohydrate absorption (BH2 peak above 20 ppm) occurred more frequently after pear juice consumption (84%) than after apple juice (41%) or grape juice

  16. Inactivation of an E.coli 0157:H7 and Salmonella composite on fresh strawberries by varying antimicrobial washes and vacuum perfusion

    Science.gov (United States)

    A 2011 outbreak of hemorrhagic colitis, which resulted in the death of two individuals, was associated with contaminated strawberries. A study was conducted to identify antimicrobial washes effective at inactivating E. coli O157:H7 and Salmonella enterica from the surface of fresh whole strawberrie...

  17. Contaminated Frozen Strawberries in School Lunches. Hearing before the Committee on Agriculture, Nutrition, and Forestry. United States Senate, One Hundred Fifth Congress, First Session (June 5, 1997).

    Science.gov (United States)

    Congress of the U.S., Washington, DC. Senate Committee on Agriculture, Nutrition, and Forestry.

    This hearing includes testimony on contaminated strawberries in school lunches. Contaminated strawberries were determined to be the cause of an outbreak of hepatitis in the state of Michigan. In addition to statements by the committee members, testimony was given by: (1) Mary Ann Keeffe, Acting Under Secretary, Food Nutrition and Consumer…

  18. A combination of baiting and different PCR formats, including measurement of real-time quantitative fluorescence, for the detection of Phytophthora fragariae in strawberry plants

    NARCIS (Netherlands)

    Bonants, P.J.M.; Gent-Pelzer, van M.P.E.; Hooftman, R.; Cooke, D.E.L.; Guy, D.C.; Duncan, J.M.

    2004-01-01

    Phytophthora fragariae, the cause of strawberry red stele disease, is a quarantine pathogen in Europe. Detecting low levels of infection requires sensitive and specific methods. In the past, Dutch and English inspection services have used bait plants to test strawberry propagation stocks destined

  19. Green and microwave synthesis of SrAl2O4 nanoparticles by application of pomegranate juice: study and characterization

    Science.gov (United States)

    Riahi-Madvaar, Ramin; Taher, Mohammad Ali; Fazelirad, Hamid

    2017-11-01

    In the present paper, a green method was applied for the synthesis of SrAl2O4 nanostructures with the aid of microwave irradiation and pomegranate juice. SrAl2O4 nanocrystals were obtained when the raw materials were irradiated with 720-900 W for 6-10 min and then calcinated at 550 °C for 5 h. Using pomegranate juice as a dispersion and stabilizing agent, SrAl2O4 nanoparticles have been made with better properties in view of morphology and particle size. Also, the effect of some parameters affecting synthesis process such as microwave power and reaction time on the morphology and particle size of product was studied and optimized. X-ray diffraction and field emission-scanning electron microscopy were used to study and characterize the manufactured SrAl2O4 nanoparticles.

  20. Species of thrips (Insecta, Thysanoptera in two strawberry production systems in Rio Grande do Sul State, Brazil

    Directory of Open Access Journals (Sweden)

    Silvia M. J. Pinent

    2011-09-01

    Full Text Available Species of thrips (Insecta, Thysanoptera in two strawberry production systems in Rio Grande do Sul, Brazil. Thrips are tiny insects responsible for the reduction of strawberry fruit quality. The work aimed to record and quantify the thysanopterofauna present in two strawberry production systems, low tunnel and semi-hydroponic. Leaves, flowers and fruits were collected weekly, from July 2005 to December 2006 in Caxias do Sul and Bom Princípio municipalities, RS. A total of 664 individuals were collected, representing two families, four genus and 10 species: Frankliniella occidentalis (Pergande, 1895, F. schultzei (Trybom, 1910, F. rodeos Moulton, 1933, F. simplex (Priesner, 1924, F. williamsi (Hood, 1915, F. gemina (Bagnall, 1919, Frankliniella sp., Thrips tabaci (Lindeman, 1888, Thrips tabaci (Lindeman, 1888, Caliothrips fasciatus (Pergande 1895 from Thripidae and Heterothrips sp. from Heterothripidae. Frankliniella occidentalis represented 89.7% of the samples with 95.8% of the species collected in flowers, 3.9% in fruits and 0.8% in leaves. The results show that flowers are the most important food resource for these insects on strawberry plants. Frankliniella rodeos, F. simplex, F. williamsi, C. fasciatus, and Heterothrips sp. are new records on strawberry for Brazil.

  1. Maturity stages affect the postharvest quality and shelf-life of fruits of strawberry genotypes growing in subtropical regions

    Directory of Open Access Journals (Sweden)

    M. Moshiur Rahman

    2016-01-01

    Full Text Available The postharvest changes of five promising strawberry genotypes viz. Sweet Charlie, Festival, Camarosa, FA 008 and BARI Strawberry-1 at ambient temperature were studied under sub tropical region during the winter season (December–April of 2010–2011 and 2011–2012 in Bangladesh. Irrespective of maturity stages percent fruit decay and weight of fruits were noted minimum in Camarosa and maximum in FA 008 up to day 4 of storage. The shelf life of fruits was maximum in Camarosa and minimum in FA 008 and BARI Strawberry-1 regardless of maturity stage throughout the storage period. The TSS, total sugar and ascorbic acid content of fruits were increased with the increase in maturity stage during the storage period. In 1/3rd and 2/3rd maturity stages, the TSS and total sugar content were found the highest in Festival but at full maturity stage those were recorded higher in Camarosa. The titratable acidity was noticed the highest in 1/3rd matured fruits and gradually decreased with the increase in maturity stage as well as storage duration in all the genotypes. Ascorbic acid content of strawberry gradually decreases during the storage period. Fully matured fresh fruits of Festival contained maximum ascorbic acid content while BARI Strawberry-1 contained minimum ascorbic acid that was reduced after 3 days of storage.

  2. Strawberry Phytochemicals Inhibit Azoxymethane/Dextran Sodium Sulfate-Induced Colorectal Carcinogenesis in Crj: CD-1 Mice

    Directory of Open Access Journals (Sweden)

    Ni Shi

    2015-03-01

    Full Text Available Human and experimental colon carcinogenesis are enhanced by a pro-inflammatory microenvironment. Pharmacologically driven chemopreventive agents and dietary variables are hypothesized to have future roles in the prevention of colon cancer by targeting these processes. The current study was designed to determine the ability of dietary lyophilized strawberries to inhibit inflammation-promoted colon carcinogenesis in a preclinical animal model. Mice were given a single i.p. injection of azoxymethane (10 mg kg−1 body weight. One week after injection, mice were administered 2% (w/v dextran sodium sulfate in drinking water for seven days and then an experimental diet containing chemically characterized lyophilized strawberries for the duration of the bioassay. Mice fed control diet, or experimental diet containing 2.5%, 5.0% or 10.0% strawberries displayed tumor incidence of 100%, 64%, 75% and 44%, respectively (p < 0.05. The mechanistic studies demonstrate that strawberries reduced expression of proinflammatory mediators, suppressed nitrosative stress and decreased phosphorylation of phosphatidylinositol 3-kinase, Akt, extracellular signal-regulated kinase and nuclear factor kappa B. In conclusion, strawberries target proinflammatory mediators and oncogenic signaling for the preventive efficacies against colon carcinogenesis in mice. This works supports future development of fully characterized and precisely controlled functional foods for testing in human clinical trials for this disease.

  3. A comparative study on aromatic profiles of strawberry vinegars obtained using different conditions in the production process.

    Science.gov (United States)

    Ubeda, Cristina; Callejón, Raquel M; Troncoso, Ana M; Moreno-Rojas, Jose M; Peña, Francisco; Morales, M Lourdes

    2016-02-01

    Impact odorants in strawberry vinegars produced in different containers (glass, oak and cherry barrels) were determined by gas chromatography-olfactometry using modified frequency (MF) technique, and dynamic headspace gas chromatography-mass spectrometry. Aromatic profile of vinegar from strawberry cooked must was also studied. All strawberry vinegars retained certain impact odorants from strawberries: 3-nonen-2-one, (E,E)-2,4-decadienal, guaiacol, nerolidol, pantolactone+furaneol, eugenol, γ-dodecalactone and phenylacetic acid. Isovaleric acid, pantolactone+furaneol, p-vinylguaiacol, phenylacetic acid and vanillin were the most important aroma-active compounds in all vinegars. The strawberry cooked must vinegar accounted for the highest number of impact odorants. Wood barrels provided more aroma complexity than glass containers. Impact odorants with grassy characteristics were predominant in vinegar from glass containers, and those with sweet and fruity characteristics in vinegars from wood barrels. Principal component analysis indicated that the production process led to differences in the impact odorants. Copyright © 2015 Elsevier Ltd. All rights reserved.

  4. Cadmium toxicity affects chlorophyll a and b content, antioxidant enzyme activities and mineral nutrient accumulation in strawberry

    Directory of Open Access Journals (Sweden)

    Ferhad Muradoglu

    2015-01-01

    Full Text Available BACKGROUND: Cadmium (Cd is well known as one of the most toxic metals affecting the environment and can severely restrict plant growth and development. In this study, Cd toxicities were studied in strawberry cv. Camarosa using pot experiment. Chlorophyll and malondialdehyde (MDA contents, catalase (CAT, superoxide dismutase (SOD, ascorbate peroxidase (APX activities and mineral nutrient concentrations were investigated in both roots and leaves of strawberry plant after exposure Cd. RESULTS: Cd content in both roots and leaves was increased with the application of increasing concentrations of Cd. We found higher Cd concentration in roots rather than in leaves. Chlorophyll a and b was decreased in leaves but MDA significantly increased under increased Cd concentration treatments in both roots and leaves. SOD and CAT activities was also increased with the increase Cd concentrations. K, Mn and Mg concentrations were found higher in leaves than roots under Cd stress. In general, increased Cd treatments increased K, Mg, Fe, Ca, Cu and Zn concentration in both roots and leaves. Excessive Cd treatments reduced chlorophyll contents, increased antioxidant enzyme activities and changes in plant nutrition concentrations in both roots and leaves. CONCLUSION: The results presented in this work suggested that Cd treatments have negative effect on chlorophyll content and nearly decreased 30% of plant growth in strawberry. Strawberry roots accumulated higher Cd than leaves. We found that MDA and antioxidant enzyme (CAT, SOD and APX contents may have considered a good indicator in determining Cd tolerance in strawberry plant.

  5. REVERSE OSMOSIS CONCENTRATION OF ORANGE JUICE USING SPIRAL WOUND MEMBRANES

    Directory of Open Access Journals (Sweden)

    W. A. de ARAUJO

    2009-03-01

    Full Text Available

    Flavor and odor components of foods are often lost during processing which leads to a poorer quality final product compared with the fresh ingredients. The orange juice industry concentrates juice (45-66ºBrix in TASTE (Thermally Accelerated Short Time Evaporator to remove excess water, and thus reduce storage and transportation costs, but also to improve product stability. Evaporation results in a loss of fresh juice flavors, color degradation and “cooked” taste due to the thermal effects. Methods using less heat for thermal damage reduction must be investigated to establish parameters for future commercial processes. The promising alternative is Reverse Osmosis (RO, but it cannot achieve concentrations greater than 30ºBrix. RO has advantages over traditional evaporation techniques in removing water. Because less heat is used, thermal damage to products is generally eliminated. In this project tests were performed using unpasteurised Single Strength Orange Juice (SSOJ, spiral wound membranes (Polyamide, and a DESAL pilot system model 4040. The aim was to evaluate spiral wound membranes on the basis of flux as a function of time. Retentate concentrations were 15-20ºBrix, and GC-FID analyses were used in order to understand aroma losses. KEYWORDS: Orange; juice; membrane; concentration; osmosis; reverse.

  6. JUICE EXTRACTION FOR TOTAL SOLUBLE SOLIDS CONTENT DETERMINATION IN MELON

    Directory of Open Access Journals (Sweden)

    Paulo Sérgio Lima e Silva

    2006-01-01

    Full Text Available The total soluble solids content (TSSC shows high positive correlation with sugars content, and therefore is generally accepted as an important quality trait of fruits. In melon, this evaluation is usually done by grinding a slice of the fruit's pulp in a household food processor, straining the ground material and then proceeding the TSSC determination in the resulting juice. This evaluation is labor-intensive and takes a long time to complete. An alternative process was delineated for obtaining the juice: the pulp of the fruit slice would be transversally cut one or more times, and longitudinally pressed by hand to obtain the juice. The objective of this work was to compare processes for obtaining juice to evaluate TSSC in melons. Fifty, 15, and 15 fruits of the Galia, Yellow, and Cantaloupe type melons were evaluated, respectively. Each fruit was considered as a block, and was longitudinally split into six fractions with similar sizes, which corresponded to the plots. The following treatments were evaluated: fraction without cuts, fractions with one, three, five, or seven transversal cuts, and the fraction treated by the conventional process. It was concluded that the procedure by which the melon slices of Galia, Yellow and Cantaloupe types are pressed for obtaining the juice to evaluate TSSC can overestimate this content. This would probably be due to the fact that the most internal section of the mesocarp presents greater TSSC than the portions closer to the epicarp.

  7. Deacidification of cranberry juice by electrodialysis with bipolar membranes.

    Science.gov (United States)

    Rozoy, Elodie; Boudesocque, Leslie; Bazinet, Laurent

    2015-01-21

    Cranberry is recognized for its many benefits on human health; however, its high acidity may be a limiting factor for its consumption. This study aimed to investigate the deacidification of cranberry juice using a two simultaneous step electrodialysis with bipolar membranes (EDBM) process. In step 1 (deacidification), during the 6 h treatment, the pH of the juice increased from 2.47 to 2.71 and a deacidification rate of 22.84% was obtained, whereas in step 2 (pH lowering) the pH of juice 2 was almost stable. Citric, quinic, and malic acid were extracted with a maximum of 25% and were mainly transferred to the KCl 2 fraction. A significant loss of anthocyanins in juice 2 (step 2) was observed, due to their oxidation by oxygen incorporated by the centrifugal pump. This also affected its coloration. The first step of the EDBM process was successful for cranberry juice deacidification and could be improved by increasing the number of membranes stacked.

  8. Decoding the Nonvolatile Sensometabolome of Orange Juice ( Citrus sinensis).

    Science.gov (United States)

    Glabasnia, Anneke; Dunkel, Andreas; Frank, Oliver; Hofmann, Thomas

    2018-03-14

    Activity-guided fractionation in combination with the taste dilution analysis, followed by liquid chromatography-tandem mass spectrometry and nuclear magnetic resonance experiments, led to the identification of 10 polymethoxylated flavones (PMFs), 6 limonoid glucosides, and 2 limonoid aglycones as the key bitterns of orange juice. Quantitative studies and calculation of dose-over-threshold factors, followed by taste re-engineering, demonstrated for the first time 25 sensometabolites to be sufficient to reconstruct the typical taste profile of orange juices and indicated that not a single compound can be considered a suitable marker for juice bitterness. Intriguingly, the taste percept of orange juice seems to be created by a rather complex interplay of limonin, limonoid glucosides, PMFs, organic acids, and sugars. For the first time, sub-threshold concentrations of PMFs were shown to enhance the perceived bitterness of limonoids. Moreover, the influence of sugars on the perceived bitterness of limonoids and PMFs in orange juice relevant concentration ranges was quantitatively elucidated.

  9. Radiation hydrolysate of tuna cooking juice with enhanced antioxidant properties

    International Nuclear Information System (INIS)

    Choi, Jong-il; Sung, Nak-Yun; Lee, Ju-Woon

    2012-01-01

    Tuna protein hydrolysates are of increasing interest because of their potential application as a source of bioactive peptides. Large amounts of tuna cooking juice with proteins and extracts are produced during the process of tuna canning, and these cooking juice wastes cause environmental problems. Therefore, in this study, cooking juice proteins were hydrolyzed by irradiation for their utilization as functional additives. The degree of hydrolysis of tuna cooking juice protein increased from 0% to 15.1% at the absorbed doses of 50 kGy. To investigate the antioxidant activity of the hydrolysate, it was performed the ferric reducing antioxidant power (FRAP) assay, and the lipid peroxidation inhibitory and superoxide radical scavenging activities were measured. The FRAP values increased from 1470 μM to 1930 μM and IC 50 on superoxide anion was decreased from 3.91 μg/mL to 1.29 μg/mL at 50 kGy. All of the antioxidant activities were increased in the hydrolysate, suggesting that radiation hydrolysis, which is a simple process that does not require an additive catalysts or an inactivation step, is a promising method for food and environmental industries. - Highlights: ► Radiation was applied for the hydrolysis of tuna cooking juice protein. ► The degree of hydrolysis were increased by irradiation and the antioxidant activity of hydrolysate was higher than protein. ► This result suggest that radiation is useful method for the hydrolysis of protein.

  10. Processing of mixed fruit juice from mango, orange and pineapple

    Directory of Open Access Journals (Sweden)

    Sajeda Begam

    2018-08-01

    Full Text Available The study was conducted to prepare mixed fruit juice by using mango pulp, pineapple and orange juices and the quality in terms of nutritional value, keeping quality, shelf life and consumers’ acceptability were investigated. Chemical analysis showed that TSS, acidity were increased slightly whereas vitamin C and pH were decreased gradually during the storage periods. Storage studies were carried out up to one month with an interval of one week and the result showed that all the samples were in good condition after one month, though little bit of faded color was found at the end of storage periods. Sample with 35% mango juice, 40% orange juice and 25% pineapple secured the highest score on sensory evaluation and showed the best consumer acceptance. This research reveals that perishable fruits can be converted to attractive mixed juice and thus increase the shelf-life, which increase value of the product. [Fundam Appl Agric 2018; 3(2.000: 440-445

  11. Could Pomegranate Juice Help in the Control of Inflammatory Diseases?

    Science.gov (United States)

    Danesi, Francesca; Ferguson, Lynnette R

    2017-08-30

    Fruits rich in polyphenols, such as pomegranates, have been shown to have health benefits relating to their antioxidant and anti-inflammatory properties. Using data obtained from PubMed and Scopus, this article provides a brief overview of the therapeutic effects of pomegranate on chronic inflammatory diseases (CID) such as inflammatory bowel disease (IBD), rheumatoid arthritis (RA), metabolic and cardiovascular disorders, and other inflammatory-associated conditions, with an emphasis on fruit-derived juices. Most studies regarding the effects of pomegranate juice have focused on its ability to treat prostate cancer, diabetes, and atherosclerosis. However, pomegranate juice has shown therapeutic potential for many other illnesses. For instance, a small number of human clinical trials have highlighted the positive effects of pomegranate juice and extract consumption on cardiovascular health. The beneficial effects of pomegranate components have also been observed in animal models for respiratory diseases, RA, neurodegenerative disease, and hyperlipidaemia. Furthermore, there exists strong evidence from rodent models suggesting that pomegranate juice can be used to effectively treat IBD, and as an anti-inflammatory agent to treat CID. The effects of pomegranate intake should be further investigated by conducting larger and more well-defined human trials.

  12. Could Pomegranate Juice Help in the Control of Inflammatory Diseases?

    Directory of Open Access Journals (Sweden)

    Francesca Danesi

    2017-08-01

    Full Text Available Fruits rich in polyphenols, such as pomegranates, have been shown to have health benefits relating to their antioxidant and anti-inflammatory properties. Using data obtained from PubMed and Scopus, this article provides a brief overview of the therapeutic effects of pomegranate on chronic inflammatory diseases (CID such as inflammatory bowel disease (IBD, rheumatoid arthritis (RA, metabolic and cardiovascular disorders, and other inflammatory-associated conditions, with an emphasis on fruit-derived juices. Most studies regarding the effects of pomegranate juice have focused on its ability to treat prostate cancer, diabetes, and atherosclerosis. However, pomegranate juice has shown therapeutic potential for many other illnesses. For instance, a small number of human clinical trials have highlighted the positive effects of pomegranate juice and extract consumption on cardiovascular health. The beneficial effects of pomegranate components have also been observed in animal models for respiratory diseases, RA, neurodegenerative disease, and hyperlipidaemia. Furthermore, there exists strong evidence from rodent models suggesting that pomegranate juice can be used to effectively treat IBD, and as an anti-inflammatory agent to treat CID. The effects of pomegranate intake should be further investigated by conducting larger and more well-defined human trials.

  13. Gamma radiation and the conservation of natural orange juice

    International Nuclear Information System (INIS)

    Iemma, Juliana; Alcarde, Andre Ricardo; Domarco, Rachel Elisabeth; Spoto, Marta Helena Fillet; Blumer, Lucimara; Matraia, Clarice

    1999-01-01

    The effect of gamma radiation was evaluated on the microbiological population, soluble solids content, acidity, p H and ascorbic acid content of natural orange juice. Microbial activity may cause deterioration of orange juice. Irradiation is a process of food conservation which eliminates microorganisms. nevertheless radiation may affect some characteristics of irradiated food. The experimental design was a 4 x 5 factorial scheme, including control and 3 rates of irradiation (2.0, 4.0 and 6.0 kGy) and 5 storage periods (1, 7, 14, 21 and 28 days), with 2 replicates. Samples of juice were extracted from variety Pera oranges and irradiated at a rate of 2.0 kGy/h ( 60 Cobalt) and thereafter stored at 5 +- 3 deg C. Results showed small changes in soluble solids content, acidity and p H, for all treatments. The ratio soluble solids/acidity was also determined and showed little variation for all treatments. There was a reduction on ascorbic acid content of the orange juice with increased radiation dosage and storage time. Gamma radiation was effective in reducing the microbiological population of the juice. (author)

  14. Quality Characteristics and Antioxidant Activity of Yogurt Supplemented with Aronia (Aronia melanocarpa) Juice

    Science.gov (United States)

    Nguyen, Linh; Hwang, Eun-Sun

    2016-01-01

    We investigated the quality characteristics and antioxidant activities of yogurt supplemented with 1%, 2%, and 3% aronia juice and fermented for 24 h at 37°C. The total acidity increased with increasing levels of aronia juice and incubation time. Lightness and yellowness of the yogurt decreased, but redness increased, with increasing aronia juice content and incubation time. The number of lactic acid bacteria (LAB) increased with increased incubation time, and yogurt containing 2% and 3% aronia juice showed higher LAB counts than 1% aroinia juice-supplemented yogurt. The total polyphenol and flavonoid contents increased proportionally with increasing levels of aronia juice. Antioxidant activity of aronia-containing yogurt was significantly higher than that of the control and increased proportionally with aronia juice concentration. Yogurt with 2% aronia juice had the best taste (Pyogurt. PMID:28078255

  15. Concord Grape Juice Supplementation Improves Memory Function In Older Adults with Mild Cognitive Impairment

    Science.gov (United States)

    Concord grape juice contains flavonoid polyphenol compounds, which have antioxidant and anti-inflammatory properties and influence neuronal signaling. Concord grape juice supplementation has been shown to reduce inflammation, blood pressure, and vascular pathology in individuals with cardiovascular...

  16. Applying of dietary fiber from sugar beet for diffusion juice purification

    Directory of Open Access Journals (Sweden)

    V. A. Loseva

    2013-01-01

    Full Text Available The pilot study examined the effects of dietary fiber and filtroperlit on the efficiency of juice purification. The rational consumption of combined sorbent is determined, sorbent contact time with juice and temperature is defined.

  17. Quality Characteristics and Antioxidant Activity of Yogurt Supplemented with Aronia (Aronia melanocarpa) Juice.

    Science.gov (United States)

    Nguyen, Linh; Hwang, Eun-Sun

    2016-12-01

    We investigated the quality characteristics and antioxidant activities of yogurt supplemented with 1%, 2%, and 3% aronia juice and fermented for 24 h at 37°C. The total acidity increased with increasing levels of aronia juice and incubation time. Lightness and yellowness of the yogurt decreased, but redness increased, with increasing aronia juice content and incubation time. The number of lactic acid bacteria (LAB) increased with increased incubation time, and yogurt containing 2% and 3% aronia juice showed higher LAB counts than 1% aroinia juice-supplemented yogurt. The total polyphenol and flavonoid contents increased proportionally with increasing levels of aronia juice. Antioxidant activity of aronia-containing yogurt was significantly higher than that of the control and increased proportionally with aronia juice concentration. Yogurt with 2% aronia juice had the best taste ( P antioxidant potential of yogurt.

  18. Emerging Preservation Techniques for Controlling Spoilage and Pathogenic Microorganisms in Fruit Juices

    OpenAIRE

    Aneja, Kamal Rai; Dhiman, Romika; Aggarwal, Neeraj Kumar; Aneja, Ashish

    2014-01-01

    Fruit juices are important commodities in the global market providing vast possibilities for new value added products to meet consumer demand for convenience, nutrition, and health. Fruit juices are spoiled primarily due to proliferation of acid tolerant and osmophilic microflora. There is also risk of food borne microbial infections which is associated with the consumption of fruit juices. In order to reduce the incidence of outbreaks, fruit juices are preserved by various techniques. Therma...

  19. Health benefit of vegetable/fruit juice-based diet: Role of microbiome

    OpenAIRE

    Henning, Susanne M.; Yang, Jieping; Shao, Paul; Lee, Ru-Po; Huang, Jianjun; Ly, Austin; Hsu, Mark; Lu, Qing-Yi; Thames, Gail; Heber, David; Li, Zhaoping

    2017-01-01

    The gut microbiota is an important contributor to human health. Vegetable/fruit juices provide polyphenols, oligosaccharides, fiber and nitrate (beet juice), which may induce a prebiotic-like effect. Juice-based diets are becoming popular. However, there is a lack of scientific evidence of their health benefits. It was our hypothesis that changes in the intestinal microbiota induced by a juice-based diet play an important role in their health benefits. Twenty healthy adults consumed only vege...

  20. Analyzing Households’ Fruit Juice Consumption and Purchasing Tendency: A Case Study From Isparta

    OpenAIRE

    Gul, Mevlut; Akpinar, Goksel; Dagistan, Erdal; Yilmaz, Hilal; Gulcan, Sinem

    2011-01-01

    The investments of fruit juice industry had been begun in 1969 in Turkey and accelerated since 1983 in modern sense. 37 fruit juice firms are officially registered as trademark. The fruit juice consumption per head was increased in the beginning of 1970s by about 13 fold augmentation, however, this value is still considerably lower than the developed countries. Relatively high fresh fruit consumption is caused lower fruit juice consumption in Turkey. However, an increasing in the domestic dem...

  1. The Effects of Glucose Therapy Agents-Apple Juice, Orange Juice, and Cola-on Enteral Tube Flow and Patency.

    Science.gov (United States)

    Steinberg, Daphna J; Montreuil, Jasmine; Santoro, Andrea L; Zettas, Antonia; Lowe, Julia

    2016-06-01

    To develop evidence-based hypoglycemia treatment protocols in patients receiving total enteral nutrition, this study determined the effect on enteral tube flow of glucose therapy agents: apple juice, orange juice, and cola, and it also examined the effects of tube type and feed type with these glucose therapy agents. For this study, 12 gastrostomy tubes (6 polyethylene and 6 silicone) were set at 50 mL/h. Each feeding set was filled with Isosource HN with fibre or Novasource Renal. Each tube was irrigated with 1 glucose therapy agent, providing approximately 20 g of carbohydrate every 4 h. Flow-rate measurements were collected at 2 h intervals. The results showed that the glucose therapy agent choice affected flow rates: apple juice and cola had higher average flow rates than orange juice (P = 0.01). A significant difference was found between tube type and enteral formula: polyethylene tubes had higher average flow rates than silicone tubes (P orange juice, and thus may be considered as primary treatment options for hypoglycemia in enterally fed patients. Polyethylene tubes and Isosource HN with fibre were less likely to clog than silicone tubes and Novasource Renal.

  2. Comparative study of pulsed electric field and thermal processing of apple juice with particular consideration of juice quality and enzyme deactivation.

    Science.gov (United States)

    Schilling, Susanne; Schmid, Sandra; Jäger, Henry; Ludwig, Michael; Dietrich, Helmut; Toepfl, Stefan; Knorr, Dietrich; Neidhart, Sybille; Schieber, Andreas; Carle, Reinhold

    2008-06-25

    As an alternative to thermal pasteurization, pulsed electric fields (PEF) were applied to apple juices on laboratory and pilot plant scale, investigating the effects on juice quality. PEF application still falls under the EU Novel Food Regulation. Consequently, extensive investigation of quality parameters is a prerequisite to prove substantial equivalence of juices resulting from the novel process and conventional production, respectively. Juice composition was not affected by PEF treatment. However, browning of the juices provided evidence of residual enzyme activities. On laboratory scale, complete deactivation of peroxidase (POD) and polyphenoloxidase (PPO) was achieved when PEF treatment and preheating of the juices to 60 degrees C were combined. Under these conditions, a synergistic effect of heat and PEF was observed. On pilot plant scale, maximum PPO deactivation of 48% was achieved when the juices were preheated to 40 degrees C and PEF-treated at 30 kV/cm (100 kJ/kg). Thus, minimally processed juices resulted from PEF processing, when applied without additional conventional thermal preservation. Since this product type was characterized by residual native enzyme activities and nondetectable levels of 5-hydroxymethylfurfural, also when preheating up to 40 degrees C was included, it ranged between fresh and pasteurized juices regarding consumers' expectation of freshness and shelf life. Consistent with comparable iron contents among all juice samples, no electrode corrosion was observed under the PEF conditions applied.

  3. Thermal tolerance of acid-adapted and unadapted Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes in cantaloupe juice and watermelon juice.

    Science.gov (United States)

    Sharma, M; Adler, B B; Harrison, M D; Beuchat, L R

    2005-01-01

    A study was performed to determine D values of acid-adapted and unadapted cells of Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes in cantaloupe juice and watermelon juice. Salmonella enterica serotype Poona, S. enterica serotype Saphra, two strains of E. coli O157:H7, and two strains of L. monocytogenes were grown in tryptic soy broth (TSB) and TSB supplemented with 1% glucose for 24 h at 37 degrees C. Decimal reduction times (D values) of cells suspended in unpasteurized cantaloupe juice and watermelon juice were determined. Acid-adapted cells of Salmonella and E. coli O157:H7, but not L. monocytogenes, had increased thermal tolerance compared with cells that were not acid-adapted. There was no correlation between soluble solids content of the two types of juice and thermal resistance. Growth of Salmonella and E. coli O157:H7 in cantaloupe juice, watermelon juice, or other acidic milieu, either in preharvest or postharvest environments, may result in cross protection to heat. The pasteurization conditions necessary to achieve elimination of pathogens from these juices would consequently have to be more severe if cells are habituated to acidic environments. Insights from this study provide guidance to developing pasteurization processes to eliminate Salmonella, E. coli O157:H7, and L. monocytogenes in cantaloupe juice and watermelon juice.

  4. Study on biologically active substances in irradiated apple juice

    International Nuclear Information System (INIS)

    Tencheva, S.

    1975-01-01

    The radiochemical changes proceeding by irradiation of foodstuffs rich in carbohydrates are studied. For the purpose pure solutions of D-glucose, D-fructose and sucrose and fresh apple juice, irradiated with 0,5 and 1,0 Mrad are investigated. Changes set in UV-spectra of the irradiated foodstuffs, the specific reaction of malonic dialdehyde formation with 2-thiobarbituric acid and the formation of carbonyl compounds reacting with 2,4-dinitro phenylhydrazine are studied. Results show that in the irradiated sample solutions of sugars and apple juice two peaks are formed. The malonic dialdehyde formation depends on the dose of irradiation applied. The newly formed carbonyl compounds both in the sample solutions and in the juice are 8 to 9 in number. (author)

  5. Importance of microbial pest control agents and their metabolites In relation to the natural microbiota on strawberry

    DEFF Research Database (Denmark)

    Jensen, Birgit; Knudsen, Inge M. B.; Jensen, Dan Funck

    control. A series of laboratory, growth chamber, semi-field and field experiments using strawberry as a model plant focusing on commercial microbial pest control products (MPCPs) or laboratory MPCAs expected to be on the market within 10 years served as our experimental platform. Initially the background...... level of indigenous microbial communities and their mycotoxins/metabolites on strawberries was examined in a field survey with 4 conventional and 4 organic growers with different production practise and geographic distribution. Culturable bacteria, yeasts and filamentous fungi were isolated...... and identified using both chemotaxonomy (fatty acids and metabolite profiling) and morphological characteristics. Microbial communities on strawberries were complex including potential plant pathogens, opportunistic human pathogens, plant disease biocontrol agents and mycotoxin producers. Bacteria were the most...

  6. Analysis of Strawberry Farmer’s Satisfaction for Utilization of “X” Fungicide in Pandanrejo Village, Batu City

    Directory of Open Access Journals (Sweden)

    Baskoro Aji Prihatmojo

    2018-01-01

    Full Text Available The objective of this research are to understand some factors that are affecting strawberry farmers satisfaction in utilization of ”X” fungicide and the level of farmer satisfaction. The location of this research in Pandanrejo Village, Batu City with 50 respndents. The method which was used in this research are decriptive statistics, Logistic Regression, and Customer Satisfaction Index (CSI. Measuring factors that affect satisfaction used four dummy variables, such as education level, group refference, training experience, and information source. And then to measure the level of satisfaction used variable of product attributes such as variety of product size, composition, expire date, procedure, permite of distribution, product availability, benefit, product information, completeness, rate of extermination ,and price. The result of logistic regression that group reference and source information are affecting the satisfaction of strawberry farmer. The obtained result of Customer Satisfaction Index method got 73,43% which means that strawberry farmer are satisfied with fungicide “X”.

  7. Quantitative Fate of Chlorogenic Acid during Enzymatic Browning of Potato Juice

    NARCIS (Netherlands)

    Narvaez Cuenca, C.E.; Vincken, J.P.; Gruppen, H.

    2013-01-01

    The quantitative fate of chlorogenic acid (ChA) during enzymatic browning of potato juice was investigated. Potato juice was prepared in water without the use of any antibrowning agent (OX treatment). As a control, a potato juice was prepared in the presence of NaHSO3 (S control). To study the

  8. 40 CFR 407.10 - Applicability; description of the apple juice subcategory.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 28 2010-07-01 2010-07-01 true Applicability; description of the apple... SOURCE CATEGORY Apple Juice Subcategory § 407.10 Applicability; description of the apple juice... apples into apple juice or apple cider. When a plant is subject to effluent limitations covering more...

  9. 77 FR 30504 - Certain Orange Juice From Brazil: Notice of Rescission of Antidumping Duty Administrative Review

    Science.gov (United States)

    2012-05-23

    ... DEPARTMENT OF COMMERCE International Trade Administration [A-351-840] Certain Orange Juice From... Administrative Review'' of the antidumping duty order on certain orange juice (OJ) from Brazil for a period of...\\ See Revocation of Antidumping Duty Order: Certain Orange Juice From Brazil, 77 FR 23659 (Apr. 20, 2012...

  10. Fresh and Commercially Pasteurized Orange Juice: An Analysis of the Metabolism of Flavonoid Compounds

    Science.gov (United States)

    Orange juice is a rich source of flavonoids, mainly the flavanones hesperidin and narirutin, associated with health benefits in humans. The objective of this study was to analyze the uptake of flavonoids in humans after the consumption of two types of orange juice, fresh squeezed (fresh juice, FJ) a...

  11. Regulation of acidity and reduction of turbidity in the clarified pomegranate juice production

    OpenAIRE

    ESHMATOV FOZIL KHIDIROVICH; MAKSUMOVA DILRABO KUCHKAROVNA; DODAEVA LAYLO KUCHKAROVNA

    2016-01-01

    Regulation of acidity and reduction of turbidity in the clarified pomegranate juice production. From sour varieties of pomegranates may obtain normal natural pomegranate juice by anion-exchange resin. There are determined problems quantity of precipitate and unstable color in the pomegranate juice and concentrate by experimentally.

  12. Influence of antioxidant rich fresh vegetable juices on starch induced postprandial hyperglycemia in rats.

    Science.gov (United States)

    Tiwari, Ashok K; Reddy, K Srikanth; Radhakrishnan, Janani; Kumar, D Anand; Zehra, Amtul; Agawane, Sachin B; Madhusudana, K

    2011-09-01

    This research analyzed the major chemical components and multiple antioxidant activities present in the fresh juice of eight vegetables, and studied their influence on starch induced postprandial glycemia in rats. A SDS-PAGE based protein fingerprint of each vegetable juice was also prepared. The yields of juice, chemical components like total proteins, total polyphenols, total flavonoids, total anthocyanins and free radicals like the ABTS˙(+) cation, DPPH, H(2)O(2), scavenging activities and reducing properties for NBT and FeCl(3) showed wide variations. Vegetable juice from brinjal ranked first in displaying total antioxidant capacity. Pretreatment of rats with vegetable juices moderated starch induced postprandial glycemia. The fresh juice from the vegetables ridge gourd, bottle gourd, ash gourd and chayote significantly mitigated postprandial hyperglycemic excursion. Total polyphenol concentrations present in vegetable juices positively influenced ABTS˙(+) scavenging activity and total antioxidant capacity. However, NBT reducing activity of juices was positively affected by total protein concentration. Contrarily, however, high polyphenol content in vegetable juice was observed to adversely affect the postprandial antihyperglycemic activity of vegetable juices. This is the first report exploring antihyperglycemic activity in these vegetable juices and highlights the possible adverse influence of high polyphenol content on the antihyperglycemic activity of the vegetable juices. This journal is © The Royal Society of Chemistry 2011

  13. 77 FR 51750 - United States Standards for Grades of Grapefruit Juice

    Science.gov (United States)

    2012-08-27

    ... standards in order to encourage uniformity and consistency in commercial practices.'' AMS is committed to... Grapefruit Juice. The petitioner requested the removal of the maximum limit for ``free and suspended pulp... concentrate, grapefruit juice, and frozen concentrated grapefruit juice establish limits for maximum free and...

  14. Evidence of Immunosuppressive and Th2 Immune Polarizing Effects of Antidiabetic Momordica charantia Fruit Juice.

    Science.gov (United States)

    Fachinan, Rufine; Fagninou, Adnette; Nekoua, Magloire Pandoua; Amoussa, Abdou Madjid; Adjagba, Marius; Lagnika, Latifou; Lalèyè, Anatole; Moutairou, Kabirou; Yessoufou, Akadiri

    2017-01-01

    The mechanism of action of the antidiabetic capacity of Momordica charantia is still under investigation. Here, we assessed phytochemical compositions, antioxidant activity, and effects of total and filtered fruit and leafy stem juices of Momordica charantia on human T cell proliferation and differentiation through quantification of Th1/Th2 cytokines. In the absence of stimulation, total fruit and leafy stem juices induced significant T cell proliferation. Under PHA stimulation, both juices potentiated plant-induced T cell proliferation. However, the filtered fruit and leafy stem juices significantly inhibited PHA-stimulated T cell proliferation, while neither juice influenced T cell proliferation. Moreover, total and filtered fruit juice increased IL-4 secretion, while total and filtered leafy stem juice enhanced IFN- γ production. Phytochemical screening revealed the presence of tannins, flavonoids, anthocyans, steroids, and triterpenoids in both juices. Alkaloids, quinone derivatives, cardenolides, and cyanogenic derivatives were undetectable. The saponins present in total juices were undetectable after filtration. Moreover, both juices had appreciable antioxidant capacity. Our study supports the type 1 antidiabetic effect of filtered fruit juice of M. charantia which may be related to its immunosuppressive and T-helper 2 cell inducing capacities. Due to their immune-stimulatory activities and their ability to increase T-helper 1 cell cytokines, total fruit and leafy stem juices may serve in the treatment of immunodeficiency and certain infections.

  15. Lemon juice has protective activity in a rat urolithiasis model

    Directory of Open Access Journals (Sweden)

    Oussama Abdelkhalek

    2007-10-01

    Full Text Available Abstract Background The use of herbal medicines (medicinal plants or phytotherapy has recently gained popularity in Europe and the United States. Nevertheless the exact mechanism of the preventive effects of these products is still far to be clearly established, being its knowledge necessary to successfully apply these therapies to avoid stone formation. Methods The effect of oral lemon juice administration on calcium oxalate urolithiasis was studied in male Wistar rats. Rats were rendered nephrolithic by providing drinking water containing 0.75% ethylene glycol [v/v] (EG and 2% ammonium chloride [w/v] (AC for 10 days. In addition to EG/AC treatment, three groups of rats were also gavage-administered solutions containing 100%, 75% or 50% lemon juice [v/v] (6 μl solution/g body weight. Positive control rats were treated with EG/AC but not lemon juice. Negative control rats were provided with normal drinking water, and were administered normal water by gavage. Each group contained 6 rats. After 10 days, serum samples were collected for analysis, the left kidney was removed and assessed for calcium levels using flame spectroscopy, and the right kidney was sectioned for histopathological analysis using light microscopy. Results Analysis showed that the rats treated with EG/AC alone had higher amounts of calcium in the kidneys compared to negative control rats. This EG/AC-induced increase in kidney calcium levels was inhibited by the administration of lemon juice. Histology showed that rats treated with EG/AC alone had large deposits of calcium oxalate crystals in all parts of the kidney, and that such deposits were not present in rats also treated with either 100% or 75% lemon juice. Conclusion These data suggest that lemon juice has a protective activity against urolithiasis.

  16. Improved energy efficiency in juice production through waste heat recycling

    International Nuclear Information System (INIS)

    Anderson, J.-O.; Elfgren, E.; Westerlund, L.

    2014-01-01

    Highlights: • A heating system at a juice production was investigated and improved. • Different impacts of drying cycle improvements at the energy usage were explored. • The total heat use for drying could thereby be decreased with 52%. • The results point out a significant decrease of heat consumption with low investment costs. - Abstract: Berry juice concentrate is produced by pressing berries and heating up the juice. The by-products are berry skins and seeds in a press cake. Traditionally, these by-products have been composted, but due to their valuable nutrients, it could be profitable to sell them instead. The skins and seeds need to be separated and dried to a moisture content of less than 10 %wt (on dry basis) in order to avoid fermentation. A berry juice plant in the north of Sweden has been studied in order to increase the energy and resource efficiency, with special focus on the drying system. This was done by means of process integration with mass and energy balance, theory from thermodynamics and psychrometry along with measurements of the juice plant. Our study indicates that the drying system could be operated at full capacity without any external heat supply using waste heat supplied from the juice plant. This would be achieved by increasing the efficiency of the dryer by recirculation of the drying air and by heat supply from the flue gases of the industrial boiler. The recirculation would decrease the need of heat in the dryer with about 52%. The total heat use for the plant could thereby be decreased from 1262 kW to 1145 kW. The improvements could be done without compromising the production quality

  17. Phenology and yield of strawberry as influenced by planting time and genotypes in a sub tropical region

    International Nuclear Information System (INIS)

    Rahman, M.M.; Islam, N.

    2016-01-01

    Effects of planting time on phenology of five strawberry genotypes Sweet Charlie, Festival, Camarosa, FA 008, and BARI strawberry-1 were evaluated at Bangladesh Agricultural Research Institute in two consecutive years 2009-2010 and 2010-2011. Sweet Charlie took the shorter time to begin flowering, followed by BARI Strawberry-1 and Festival when planted in 1st October. Genotype FA 008 took longer time to flower when planted in 1st December. Days to flowering of all the varieties was found to decrease with the increase in air temperature. Regardless of planting year, the genotype FA 005 followed by Camarosa and Festival, planted on 1st September, exhibited the longest harvest duration, while Sweet Charlie planted on 1st December exhibited the shortest harvest duration in both years. Genotype Festival planted on October yielded fruit with the greatest fruit weight, followed by Sweet Charlie and Camarosa planted on the same date. Plants of FA 008 and BARI Strawberry-1 planted in December produced minimum fruit weight. Maximum number of fruits/plant as well as yield/plant obtained from Sweet Charlie planted in October, while BARI Strawberry-1 planted in December yielded the least. With the use of quadratic equation it was estimated that maximum yield was obtained at ambient temperature 18.5 degree C then it was decreased with the increase of temperature. Strawberry planted in early October was found to be the most suitable in Bangladesh. Among the studied genotypes, Sweet Charlie was found to be superior in yield and early planting, and Camarosa was suitable for late planting. Festival was found less sensitive to planting date. (author)

  18. Conservation biological control in strawberry: effect of different pollen on development, survival, and reproduction of Neoseiulus californicus (Acari: Phytoseiidae).

    Science.gov (United States)

    Gugole Ottaviano, María F; Cédola, Claudia V; Sánchez, Norma E; Greco, Nancy M

    2015-12-01

    Wild vegetation surrounding crops may provide temporary habitat and potential food sources for phytoseiids in different seasons. Monthly vegetation samples of wild plants adjacent to strawberry plants and wild plants in a vegetation strip close to the crop were taken. The frequency of Neoseiulus californicus, Tetranychus urticae and other mites and insects was recorded. In addition, in a laboratory assay, the survival, developmental time and fecundity of females fed on pollen of strawberry and pollen of wild plants where N. californicus was recorded during their flowering, were estimated. Pollen from Urtica urens, Lamium amplexicaule, Convolvulus arvensis, Sonchus oleraceous, Galega officinalis, and Fragaria x ananassa (strawberry) allowed development of N. californicus to adult, but not reproduction. Survival was 70-80 % when fed on pollen from S. oleraceus, G. officinalis and C. arvensis, 80-90 % when fed on pollen from U. urens and F. x ananassa, and more than 90 % when fed on T. urticae and on pollen from L. amplexicaule. In autumn and winter, U. urens, L. amplexicaule and S. oleraceous could promote the persistence of N. californicus when prey density in strawberry is low, offering T. urticae, thrips and pollen. In summer, pollen of C. arvensis and G. officinalis would contribute to the persistence of N. californicus when the strawberry crop is ending and offers scarce food resources. Although the pollen of these plants would not enable the predator population to increase, the presence of these plants in the vicinity of strawberry could contribute to the persistence of N. californicus population and help to limit T. urticae growth when this pest begins to colonize the crop.

  19. Identification, Isolation, and Expression Analysis of Heat Shock Transcription Factors in the Diploid Woodland Strawberry Fragaria vesca

    Directory of Open Access Journals (Sweden)

    Yang eHu

    2015-09-01

    Full Text Available Heat shock transcription factors (Hsfs are known to play dominant roles in plant responses to heat, as well as other abiotic or biotic stress stimuli. While the strawberry is an economically important fruit plant, little is known about the Hsf family in the strawberry. To explore the functions of strawberry Hsfs in abiotic and biotic stress responses, this study identified 17 Hsf genes (FvHsfs in a wild diploid woodland strawberry (Fragaria vesca, 2n = 2x = 14 and isolated 14 of these genes. Phylogenetic analysis divided the strawberry FvHsfs genes into three main groups. The evolutionary and structural analyses revealed that the FvHsf family is conserved. The promoter sequences of the FvHsf genes contain upstream regulatory elements corresponding to different stress stimuli. In addition, 14 FvHsf-GFP fusion proteins showed differential subcellular localization in Arabidopsis mesophyll protoplasts. Furthermore, we examined the expression of the 17 FvHsf genes in wild diploid woodland strawberries under various conditions, including abiotic stresses (heat, cold, drought, and salt, biotic stress (powdery mildew infection, and hormone treatments (abscisic acid, ethephon, methyl jasmonate, and salicylic acid. Fifteen of the 17 FvHsf genes exhibited distinct changes on the transcriptional level during heat treatment. Of these 15 FvHsfs, 8 FvHsfs also exhibited distinct responses to other stimuli on the transcriptional level, indicating versatile roles in the response to abiotic and biotic stresses. Taken together, the present work may provide the basis for further studies to dissect FvHsf function in response to stress stimuli.

  20. Intestinal mucus and juice glycoproteins have a liquid crystalline structure

    International Nuclear Information System (INIS)

    Denisova, E.A.; Lazarev, P.I.; Vazina, A.A.; Zheleznaya, L.A.

    1985-01-01

    X-ray diffraction patterns have been obtained from the following components of canine gastrointestinal tract: (1) native small intestine mucus layer; (2) the precipitate of the flocks formed in the duodenal juice with decreasing pH; (3) concentrated solutions of glycoproteins isolated from the duodenal juice. The X-ray patterns consist of a large number of sharp reflections of spacings between about 100 and 4 A. Some reflections are common for all components studied. All the patterns are interpreted as arising from the glycoprotein molecules ordered into a liquid crystalline structure. (author)

  1. Acetone and acetaldehyde determination in tomato juice by isotopic dilution

    International Nuclear Information System (INIS)

    Piva, M.-T.; Crouzet, J.

    1977-01-01

    Acetone and acetaldehyde content of tomato juice were determined by isotope dilution techniques. The juice is added to 14 C labelled compounds, carried along by nitrogen at low pressure. The mixture of 2.4 dinitrophenylhydrazones obtained from volatile compounds is separated by thin layer chromatography on silica gel and then on alumina. A determination of radioactivity and concentration of acetone and acetaldehyde 2,4 dinitrophenylhydrazones obtained after separation and elution allow to calculate the content of these two compounds in the initial product with the same sample. This technique could be used for determination of methanol and ethanol after transformation in 3,5 dinitrobenzoates [fr

  2. Effect of gamma-irradiation and refrigerated storage on mold growth and keeping quality of strawberry (Fragaria sp) cv 'Confitura'

    International Nuclear Information System (INIS)

    Hussain, P.R.; Meena, R.S.; Dar, M.A.; Wani, A.M.; Mir, M.A.; Shafi, F.

    2007-01-01

    Gamma-irradiation of fresh matured strawberries at 0.5-2.0 kGy and storage under ambient and refrigerated conditions was tested for delaying the mold appearance and extension of storage life. Radiation dose of 2.0 kGy was effective in extending the storage life of fresh strawberries by 2 days under ambient conditions. Samples irradiated at 1.5 and 2.0 kGy followed by refrigerated storage delayed the mold growth significantly (p≤0.05) and extended the storage life by 8 days. (author)

  3. Gibberellin mediates daylength-controlled differentiation of vegetative meristems in strawberry (Fragaria × ananassa Duch

    Directory of Open Access Journals (Sweden)

    Moritz Thomas

    2009-02-01

    Full Text Available Abstract Background Differentiation of long and short shoots is an important developmental trait in several species of the Rosaceae family. However, the physiological mechanisms controlling this differentiation are largely unknown. We have studied the role of gibberellin (GA in regulation of shoot differentiation in strawberry (Fragaria × ananassa Duch. cv. Korona. In strawberry, differentiation of axillary buds to runners (long shoot or to crown branches (short shoot is promoted by long-day and short-day conditions, respectively. Formation of crown branches is a prerequisite for satisfactory flowering because inflorescences are formed from the apical meristems of the crown. Results We found that both prohexadione-calcium and short photoperiod inhibited runner initiation and consequently led to induction of crown branching. In both cases, this correlated with a similar decline in GA1 level. Exogenous GA3 completely reversed the effect of prohexadione-calcium in a long photoperiod, but was only marginally effective in short-day grown plants. However, transfer of GA3-treated plants from short days to long days restored the normal runner formation. This did not occur in plants that were not treated with GA3. We also studied GA signalling homeostasis and found that the expression levels of several GA biosynthetic, signalling and target genes were similarly affected by prohexadione-calcium and short photoperiod in runner tips and axillary buds, respectively. Conclusion GA is needed for runner initiation in strawberry, and the inhibition of GA biosynthesis leads to the formation of crown branches. Our findings of similar changes in GA levels and in GA signalling homeostasis after prohexadione-calcium and short-day treatments, and photoperiod-dependent responsiveness of the axillary buds to GA indicate that GA plays a role also in the photoperiod-regulated differentiation of axillary buds. We propose that tightly regulated GA activity may control

  4. Cassava starch edible coating incorporated with propolis on bioactive compounds in strawberries

    Directory of Open Access Journals (Sweden)

    Ariela Betsy Thomas

    2016-02-01

    Full Text Available ABSTRACT Strawberry is a fruit appreciated throughout the world due to its attractive quality attributes and stands out due to its high phenolic compound content, which positively contribute to biological properties of nutritional interest. The objective of this study was to evaluate the effect of cassava starch coatings incorporated with propolis combinations on the phytochemical content and the maintenance and increase of the strawberry antioxidant activity. The treatments were 3% cassava starch (CS, 3% cassava starch + 33% ethanolic propolis extract (CS + P33%, 3% cassava starch + 66% ethanolic propolis extract (CS + P66% and control (C. The fruits were stored at 4 °C ± 0.5 ºC and 90%RH for 16 days, making up a completely randomized design with 4 treatments and 5 time evaluations. Vitamin C, phenolic compound, anthocyanin, and antioxidant activity levels were evaluated through two methods. The coating with 66% of propolis promoted higher Vitamin C content than fruits submitted to the other treatments at 8 and 12 days of storage. For antioxidant activity, fruits treated with CS maintained a higher FRS percentage (free radical scavenging at all time evaluations. Control fruits presented higher anthocyanin content at the last evaluation time when the highest antioxidant capacity, by the ABTS method (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid, was observed in fruits with CS and CS + P66% treatments. There was an increase tendency of the phenolic content during storage in all evaluated fruits. The propolis concentrations used, however, were not sufficient to increase or maintain the antioxidant capacity and phenolic contents of strawberries.

  5. Aroma biosynthesis in strawberry: s-adenosylmethionine:furaneol o-methyltransferase activity in ripening fruits.

    Science.gov (United States)

    Lavid, Noa; Schwab, Wilfried; Kafkas, Ebru; Koch-Dean, Margery; Bar, Einat; Larkov, Olga; Ravid, Uzi; Lewinsohn, Efraim

    2002-07-03

    Among the most important volatile compounds in the aroma of strawberries are 2,5-dimethyl-4-hydroxy-3(2H)-furanone (Furaneol) and its methoxy derivative (methoxyfuraneol, mesifuran). Three strawberry varieties, Malach, Tamar, and Yael, were assessed for total volatiles, Furaneol, and methoxyfuraneol. The content of these compounds sharply increased during fruit ripening, with maximum values at the ripe stage. An enzymatic activity that transfers a methyl group from S-adenosylmethionine (SAM) to Furaneol sharply increases during ripening of strawberry fruits. The in vitro generated methoxyfuraneol was identified by radio-TLC and GC-MS. The partially purified enzyme had a native molecular mass of approximately 80 kDa, with optimum activity at pH 8.5 and 37 degrees C. A high apparent K(m) of 5 mM was calculated for Furaneol, whereas this enzyme preparation apparently accepted as substrates other o-dihydroxyphenol derivatives (such as catechol, caffeic acid, and protocatechuic aldehyde) with much higher affinities (K(m) approximately 105, 130, and 20 microM, respectively). A K(m) for SAM was found to be approximately 5 microM, regardless of the acceptor used. Substrates that contained a phenolic group with only one OH group, such as p-coumaric and trans-ferulic acid, as well as trans-anol and coniferyl alcohol, were apparently not accepted by this activity. It is suggested that Furaneol methylation is mediated by an O-methyltransferase activity and that this activity increases during fruit ripening.

  6. Combined heat and gamma-irradiation treatments for the control of strawberry diseases under market conditions

    International Nuclear Information System (INIS)

    Brodrick, H.T.; Thomas, A.C.; Van Tonder, A.J.; Terblanche, J.C.

    1977-02-01

    The spoilage of strawberries under local market conditions was investigated. It was confirmed that the major losses are due to 'leak' disease caused by Rhizopus stolonifer (Ehr. ex Fr.) Lind. It was also established that further fruit losses in summer are due to anthracnose caused by the fungus Colletotrichum acutatum Simmonds. This is the first time that the latter pathogen has been isolated and identified and recognised as a problem on strawberries in South Africa. Studies with R. stolonifer in culture showed that 46 degrees Celsius for 20 min (the previous international standard heat treatment for fruit) was disappointing, while a treatment at 50 degrees Celsius for 10 min effectively inhibited spore germination. Irradiation studies with cultures of R. stolonifer and C. acutatum showed that a dose of 200 and 100 krad, respectively, resulted in excellent inhibition of spore germination. However, irradiating in nitrogen gas resulted in a tenfold reduction in the effectiveness of the irradiation treatments. The use of nitrogen during irradiation, therefore, cannot be considered, especially where an effective control of the fungal pathogens is desired. Investigations with different cultivars clearly demonstrated the synergistic effect on disease control obtained when combining heat and irradiation treatments. The combination treatment (moist heat at 50-52 degrees Celsius for 10 min plus 200 krad), besides effectively controlling both diseases in strawberries, did not adversely affect berry quality. In simulated transport tests it was shown that a minimal amount of berry softening did occur with this treatment, but this adverse effect was negligible compared with the beneficial effect obtained from disease control. In semi-commercial experiments it was shown that the combination heat and irradiation treatment effectively controlled spoilage diseases for a period of several days from picking, thus allowing sufficient time to market the fruit under local market

  7. Micro- and nano-capsulated fungal pectinase with outstanding capabilities of eliminating turbidity in freshly produced juice.

    Science.gov (United States)

    Mahmoud, Khaled F; Abo-Elmagd, Heba I; Housseiny, Manal M

    2018-01-01

    The present study aimed to compare the pectinase forms produced from Trichoderma viride-free, micro-capsule, and nano-capsule-in sodium alginate to analyze the pectin that causes the turbidity of orange juice. This was performed along with an estimation of viscosity, residual of pectin, and turbidity. The extracted and purified enzyme was 24.35-fold better than that of the crude enzyme. After application of free one, it loses most of the activity on low degrees of acidity and remains constant on the temperatures of pasteurization. Therefore, the tested enzyme was encapsulated by two different ways using the same polymer. The morphology of the three pectinase forms was obtained by transmission electron microscopy, and the micrographs clearly showed the pores on the surface of sodium alginate matrix after encapsulation. The size of the wall (sodium alginate) ranged from 3.24 to 3.76 µm diameter but was 3.15 µm for core of enzyme. Micro-capsuled and nano-capsuled pectinase can be used in the hydrolysis of pectic substances in orange juice with natural ways and maintaining the quality of final product. Consequently, the cost of juice clarifying can be reduced due to reusing the enzyme several times.

  8. Qualitative and quantitative analysis of flavonoids of the strawberry tree - Arbutus unedo L. (Ericaceae).

    Science.gov (United States)

    Males, Zeljan; Plazibat, Misko; Vundać, Vjera Bilusić; Zuntar, Irena

    2006-06-01

    The leaves and fruits of strawberry tree - Arbutus unedo L., collected from two separate geographic locations in Croatia were investigated to determine their flavonoid composition and content. Quercitrin, isoquercitrin, hyperoside and rutin were identified in all leaf samples by means of thin-layer chromatography; the fruits contained only isoquercitrin. Chlorogenic acid was present in some leaf samples. The content of flavonoids depended on the plant organ investigated, date of collection and the locality. Spectrophotometric determination of the flavonoids indicated that the leaves are richer in flavonoids (0.52-2.00%) than fruits (0.10-0.29%).

  9. Somatic Embryogenesis Induction and Plant Regeneration in Strawberry Tree (Arbutus unedo L.).

    Science.gov (United States)

    Martins, João F; Correia, Sandra I; Canhoto, Jorge M

    2016-01-01

    Somatic embryogenesis is a powerful tool both for cloning and studies of genetic transformation and embryo development. Most protocols for somatic embryogenesis induction start from zygotic embryos or embryonic-derived tissues which do not allow the propagation of elite trees. In the present study, a reliable protocol for somatic embryogenesis induction from adult trees of strawberry tree is described. Leaves from in vitro proliferating shoots were used to induce somatic embryo formation on a medium containing an auxin and a cytokinin. Somatic embryos germinated in a plant growth regulator-free medium.

  10. Product environmental footprint of strawberries: Case studies in Estonia and Germany.

    Science.gov (United States)

    Soode-Schimonsky, Eveli; Richter, Klaus; Weber-Blaschke, Gabriele

    2017-12-01

    The environmental impacts of strawberries have been assessed in several studies. However, these studies either present dissimilar results or only focus on single impact categories without offering a comprehensive overview of environmental impacts. We applied the product environmental footprint (PEF) methodology to broadly indicate the environmental impacts of various strawberry production systems in Germany and Estonia by 15 impact categories. Data for the 7 case studies were gathered from two farms with organic and two farms with conventional open field production systems in Estonia and from one farm with conventional open field and one farm with a polytunnel and greenhouse production system in Germany. The greenhouse production system had the highest environmental impact with a PEF of 0.0040. In the field organic production systems, the PEF was 0.0029 and 0.0028. The field conventional production systems resulted in a PEF of 0.0008, 0.0009 and 0.0002. Polytunnel PEF was 0.0006. Human toxicity cancer effects, particulate matter and human toxicity non-cancer effects resulted in the highest impact across all analysed production systems. The main contributors were electricity for cooling, heating the greenhouse and the use of agricultural machinery including fuel burning. While production stage contributed 85% of the total impact in the greenhouse, also other life cycle stages were important contributors: pre-chain resulted in 71% and 90% of impact in conventional and polytunnels, respectively, and cooling was 47% in one organic system. Environmental impact from strawberry cooling can be reduced by more efficient use of the cooling room, increasing the strawberry yield or switching from oil shale electricity to other energy sources. Greenhouse heating is the overall impact hotspot even if it based on renewable resources. A ranking of production systems based on the environmental impact is possible only if all relevant impacts are included. Future studies should aim

  11. Strawberries packaged with Polyvinyl Chloride (PVC film/ Morangos embalados com filme de Ppolicloreto de Vinila (PVC

    Directory of Open Access Journals (Sweden)

    Sergio Ruffo Roberto

    2006-06-01

    Full Text Available Strawberries cv. Dover with approximately 75% of their surface with red color was packaged in disposable polyethylene terephthalate (PET container and sealed with PVC film of 15mm thick. Strawberries without film serves as control. The fruits were stored at 12°C for ten days and there were determined during storage time the titratable acidity, solid soluble and vitamin C contents, color, respiration rate, texture and weight loss. After 6 days the strawberries packaged without film had decayed while the fruits packaged with PVC film were in conditions of consumption and commercialization. After 10 days all fruits were inappropriate to consumption. Packages with PVC film extended the shelf life of strawberries preserving the color characteristic of the product and vitamin C content, reducing the respiration rate and weight loss, characterizing this packaging as being adequate to this kind of product.Foram utilizados morangos cv. Dover com aproximadamente 75% de sua superfície com coloração vermelha e embalados em potes de polietileno tereftalato (PET. No tratamento CONTROLE os morangos foram acondicionados sem filme e no tratamento FILME, as embalagens foram seladas com filme de PVC de 15mm de espessura. As frutas foram armazenadas a 12°C por dez dias e foram determinadas ao longo do tempo acidez titulável, sólidos solúveis, vitamina C, cor, taxa de respiração, textura e perda de massa. Após 6 dias de armazenagem os morangos CONTROLE estavam impróprios para consumo pois apresentavam deterioração visível por bolores enquanto que os embalados com PVC estavam em condições de consumo e comercialização. Após 10 dias todos os morangos estavam impróprios para consumo. A embalagem utilizando filme de PVC aumentou a vida de prateleira de morangos em relação aos sem embalagem pois preservou melhor a coloração característica do produto e teor de vitamina C e reduziu as taxas de respiração e de perda de massa, caracterizando a

  12. Grape juice quality control by means of {sup 1}H NMR spectroscopy and chemometric analyses

    Energy Technology Data Exchange (ETDEWEB)

    Grandizoli, Caroline Werner Pereira da Silva; Campos, Francinete Ramos; Simonelli, Fabio; Barison, Andersson [Universidade Federal do Paraná (UFPR), Curitiba (Brazil). Departamento de Química

    2014-07-01

    This work shows the application of {sup 1}H NMR spectroscopy and chemometrics for quality control of grape juice. A wide range of quality assurance parameters were assessed by single {sup 1}H NMR experiments acquired directly from juice. The investigation revealed that conditions and time of storage should be revised and indicated on all labels. The sterilization process of homemade grape juices was efficient, making it possible to store them for long periods without additives. Furthermore, chemometric analysis classified the best commercial grape juices to be similar to homemade grape juices, indicating that this approach can be used to determine the authenticity after adulteration. (author)

  13. Determination of essential and toxic elements in commercially available fruit juices

    International Nuclear Information System (INIS)

    Yawar, W.; Rahman, S.

    1997-01-01

    A study has been carried out for the determination of Cr, Pb, Fe in different varieties of commercially available packed fruit juices like apple, mango orange and mixed flavour by using flame and electrothermal atomic absorption spectrophotometric technique. These juices are available at a reasonable price and are commonly used by public. Like many other articles the baseline levels of essential and toxic elements in Pakistani fruit juices are generally not available. It was, therefore, considered to monitor the levels of essential as well toxic elements in the juices. Hence a variety of juices was collected from local market and measurements of the above mentioned elements were made. (author)

  14. Evaluation of radurizited and pasteurized fruits juices during 12 months of storage

    International Nuclear Information System (INIS)

    Wilska-Jeszka, J.; Skorupinska, A.

    1975-01-01

    Stability of radurized red and black currant, bilberry, plum and tomato juices, stored at a temperature of 20+-3 0 C, was investigated. With 60 Co as radiation source, doses of 0,5 to 1,5 Mrad were applied. In a 12-month period no significant changes in pH, total and volatile acidity were found. Anthocyanic pigment and ascorbic acid losses were greater in radurized than in pasteurized juices. No organoleptic changes occurred after irradiation with 1 Mrad in tomato juices, very little change in plum and bilberry juices and considerable unfavorable changes in currant juice

  15. Influence of kinnow juice on the bioavailability of carbamazepine in healthy male volunteers.

    Science.gov (United States)

    Garg, S K; Bhargava, V K; James, H; KuJan-Mar, N; Prabhakar, S; Naresh, Ku

    1998-01-01

    Kinnow juice produces a marked and variable increase in carbamazepine bioavailability. The pharmacokinetics of carbamazepine was studied after drug administration with 300 ml water or kinnow juice in a randomized cross over trial on nine healthy male volunteers. With kinnow juice peak serum concentration (Cmax) and area under the serum concentration time curve (AUC) was significantly (P kinnow juice enhances carbamazepine bioavailability could be due to inhibition of cytochrome P-450 enzyme, since kinnow juice contains naringin which is considered to be inhibitor of liver microsomal dihydropyridine oxidation.

  16. Effect of Extraction, Pasteurization and Cold Storage on Flavonoids and other Secondary Metabolites in Fresh Orange Juice

    Science.gov (United States)

    Fresh orange juice is perceived to be more wholesome than processed juice. Fresh juice may have nutrients and phytonutrients that differ from pasteurized or processed juice. To evaluate this, 'Hamlin’ and ‘Valencia’ oranges were extracted using a commercial food service juicer, pasteurized or not, r...

  17. Effect of extraction method on quality of orange juice: hand-squeezed, commercial-fresh squeezed and processed

    Science.gov (United States)

    Fresh orange juice is perceived to be more wholesome than processed juice. Fresh juice may have flavor and nutrients that differ from pasteurized or processed juice. In this study, ‘Hamlin’ and ‘Valencia’ oranges were extracted using a commercial food service juicer, pasteurized or not, resulting in...

  18. Ascorbic acid improves the antioxidant activity of European grape juices by improving the juices' ability to inhibit lipid peroxidation of human LDL in vitro

    DEFF Research Database (Denmark)

    Landbo, Anne-Katrine Regel; Meyer, Anne Boye Strunge

    2001-01-01

    . Red grape juice concentrate inhibited lipid peroxidation of LDL by prolonging the lag phase by 2.7 times relative to a control when evaluated at a total phenolic concentration of 10 muM gallic acid equivalents (GAE). Both red grape juices tested blocked lipid peroxidation of LDL at 20 muM GAE. White.......96, P acid alone did not exert antioxidant activity towards LDL, but combinations of 5 muM ascorbic acid with 5 muM GAE juice phenols eliminated the prooxidant activity of white grape juice, and significantly...

  19. A screening method based on UV-Visible spectroscopy and multivariate analysis to assess addition of filler juices and water to pomegranate juices.

    Science.gov (United States)

    Boggia, Raffaella; Casolino, Maria Chiara; Hysenaj, Vilma; Oliveri, Paolo; Zunin, Paola

    2013-10-15

    Consumer demand for pomegranate juice has considerably grown, during the last years, for its potential health benefits. Since it is an expensive functional food, cheaper fruit juices addition (i.e., grape and apple juices) or its simple dilution, or polyphenols subtraction are deceptively used. At present, time-consuming analyses are used to control the quality of this product. Furthermore these analyses are expensive and require well-trained analysts. Thus, the purpose of this study was to propose a high-speed and easy-to-use shortcut. Based on UV-VIS spectroscopy and chemometrics, a screening method is proposed to quickly screening some common fillers of pomegranate juice that could decrease the antiradical scavenging capacity of pure products. The analytical method was applied to laboratory prepared juices, to commercial juices and to representative experimental mixtures at different levels of water and filler juices. The outcomes were evaluated by means of multivariate exploratory analysis. The results indicate that the proposed strategy can be a useful screening tool to assess addition of filler juices and water to pomegranate juices. Copyright © 2012 Elsevier Ltd. All rights reserved.

  20. Adulteration of apple with pear juice: emphasis on major carbohydrates, proline, and arbutin.

    Science.gov (United States)

    Thavarajah, Pushparajah; Low, Nicholas H

    2006-06-28

    Detection of juice-to-juice adulteration based on chemical composition studies is a common method used by government regulatory agencies and food companies. This study investigated the use of major carbohydrate (fructose, glucose and sucrose), polyol (sorbitol), proline, and phenolic profiles as indicators of pear adulteration of apple juice (PAAJ). For this work, a total of 105 authentic apple juice samples from 13 countries and 27 authentic pear juice samples from 5 countries were analyzed. Because the major carbohydrate ranges for these juices showed significant overlap their use as markers for PAAJ detection would be very limited. It was found that sorbitol and proline means for apple and pear were significantly different; however, their broad natural ranges would afford PAAJ at levels up to 30% without detection. In addition, careful selection of the pear juice used as the adulterant would further limit the usefulness of these markers for PAAJ detection. Arbutin was conclusively identified as a marker for pear juice on the basis of its presence in all 27 authentic pear samples and its absence (apple juice samples analyzed in this study. The application of the developed HPLC-PDA method for arbutin analysis to detect PAAJ at levels as low as 2% (v/v) was demonstrated. A confirmation method for the presence of arbutin in pure pear juice and apple adulterated with pear juice was introduced on the basis of the hydrolysis of arbutin to hydroquinone employing beta-glucosidase, with reactant and product monitoring by HPLC-PDA.