Academic literature on the topic 'Postharvest technology'
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Journal articles on the topic "Postharvest technology"
Chen, Guangnan, John A. Anderson, Paul Bannister, and C. Gerald Carrington. "PH—Postharvest Technology." Biosystems Engineering 81, no. 1 (January 2002): 73–83. http://dx.doi.org/10.1006/bioe.2001.0001.
Full textGiner, Sergio A., and Rodolfo H. Mascheroni. "PH—Postharvest Technology." Biosystems Engineering 81, no. 1 (January 2002): 85–97. http://dx.doi.org/10.1006/bioe.2001.0004.
Full textPabis, S., and M. Jaros. "PH—Postharvest Technology." Biosystems Engineering 81, no. 2 (February 2002): 201–11. http://dx.doi.org/10.1006/bioe.2001.0015.
Full textStudman, C. J., and M. Geyer. "PH—Postharvest Technology." Biosystems Engineering 82, no. 1 (May 2002): 65–72. http://dx.doi.org/10.1006/bioe.2001.0022.
Full textChua, K. J., S. K. Chou, M. N. A. Hawlader, A. S. Mujumdar, and J. C. Ho. "PH—Postharvest Technology." Biosystems Engineering 81, no. 1 (January 2002): 99–111. http://dx.doi.org/10.1006/bioe.2001.0026.
Full textDe Belie, N., F. R. Harker, and J. De Baerdemaeker. "PH—Postharvest Technology." Biosystems Engineering 81, no. 3 (March 2002): 297–303. http://dx.doi.org/10.1006/bioe.2001.0027.
Full textAkubuo, C. O., and B. E. Eje. "PH—Postharvest Technology." Biosystems Engineering 81, no. 2 (February 2002): 193–99. http://dx.doi.org/10.1006/bioe.2001.0029.
Full textTabak, S. I., A. B. Biran, I. Tabak, and G. Manor. "PH—Postharvest Technology." Biosystems Engineering 81, no. 4 (April 2002): 395–405. http://dx.doi.org/10.1006/bioe.2001.0037.
Full textPeirs, Ann, Nico Scheerlinck, Kathleen Touchant, and Bart M. Nicolaı̈. "PH—Postharvest Technology." Biosystems Engineering 81, no. 3 (March 2002): 305–11. http://dx.doi.org/10.1006/bioe.2001.0040.
Full textJha, S. N., T. Matsuoka, and K. Miyauchi. "PH—Postharvest Technology." Biosystems Engineering 81, no. 4 (April 2002): 407–12. http://dx.doi.org/10.1006/bioe.2002.0044.
Full textDissertations / Theses on the topic "Postharvest technology"
Greeley, M. "Rice in Bangladesh : Postharvest losses, technology and employment." Thesis, University of Sussex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373146.
Full textMarais, Evelyn. "Postharvest manipulation of fruit colour in apples and pears." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51878.
Full textENGLISH ABSTRACT: Red colour development on bi-coloured apples and pears ensures better prices for producers. The use of postharvest irradiation to improve colour has been successful on apples, and the objectives of this thesis were to optimise conditions during irradiation for apples and to evaluate the effects of irradiation on pears. 'Cripp's Pink' apples responded to postharvest irradiation with high-pressure sodium (HPS) lights by developing a red blush, whereas the response to irradiation with UV 8 plus incandescent lights was less effective. '8raeburn' apples held at -0.5°C for 4 or 8 weeks prior to irradiation showed a decrease in hue angle and an increase in anthocyanin concentration after 72 hours of irradiation with HPS lamps. In 'Forelle' pears treated in the same way, neither colour development nor anthocyanin synthesis was affected by irradiation. '8raeburn' and 'Cripp's Pink' apples picked weekly for 5 weeks until the optimum harvest date were irradiated with HPS lights. A significant increase in fruit colour was only measured in mature fruit of both cultivars. 'Cripp's Pink' apples were harvested from two production areas with different microclimates, namely, Ceres and Grabouw, and stored for 0, 2 or 5 days at -0.5 °C before irradiation for 120 hours at either 6°C or 20°C. Fruit from Ceres that were irradiated immediately after harvest developed better colour at 6 °C than at 20°C. The differences between fruit irradiated at the two temperatures were no longer significant after 5 days of cold storage prior to irradiation. Fruit from Grabouw consistently developed better colour when irradiated at 6°C than at 20°C. Colour development slightly after 5 days of cold storage prior to irradiation. In another experiment, fruit from both areas were stored at -0.5°C for 20 days before irradiation at either 6°C or 6/20°C. The fluctuating temperature regime resulted in decreases in hue angle of 70° and 65° for the fruit from Grabouw and Ceres, respectively. The decreases were smaller (±200) when fruit were irradiated at 6°C. The hue angle value of well-coloured 'Cripp's Pink' apples held at 3rC under HPS lights for 144 hours increased from 29.3° to 48.3°, and anthocyanin concentration decreased from 739.9 IJg·g·1to 283.6 IJg·g·1. Control fruit held at the same temperature in the dark did not show any change in hue angle value or anthocyanin concentration. 'Bon Rouge' and 'Red d' Anjou', two full red pear cultivars, irradiated with HPS lights for 72 hours, showed no significant changes in hue angle. 'Forelle' pears, harvested with or without attached leaves, were irradiated with HPS at two temperature regimes, 20°C and 200/6°C. The resulting decreases in hue angle were attributed to yellowing and not red colour formation. In conclusion, the response of apples to postharvest irradiation was affected by maturity and temperature, while pears failed to respond at all.
AFRIKAANSE OPSOMMING: Rooikleurontwikkeling van twee-kleur appels en pere verseker beter pryse vir die produsente. Na-oesbestraling om kleur te verbeter is al suksesvol uitgevoer op appels, en die doelwit van hierdie tesis was om die kondisies vir appels gedurende bestraling te optimaliseer en om die effek van bestraling op pere te evalueer. 'Cripp's Pink' appels het reageer op na-oesbestraling met hoëdruk-natriumligte (HDN) deur 'n rooi blos te ontwikkel, terwyl die reaksie op bestraling met UV-B plus gloeilamplig minder effektief was. 'Braebum' appels opgeberg by -O.5aC vir 4 of 8 weke voor bestraling het 'n afname in die kleurskakeringswaarde getoon, asook 'n toename in antosianienkonsentrasie na 72 uur se bestraling met HDN ligte. 'Forelle' pere wat dieselfde behandeling ontvang het, het geen kleurontwikkeling en geen antosianienontwikkeling getoon na bestraling nie. 'Braebum' en 'Cripp's Pink' appels wat weekliks geoes is vir 5 weke tot die optimum oesdatum is bestraal met HDN ligte. Slegs die volwasse vrugte van beide kultivars het 'n betekenisvolle toename in kleur getoon. 'Cripp's Pink' appels is geoes in twee produksie areas met verskillende mikroklimate, naamlik Ceres en Grabouw. Vrugte is opgeberg vir 0, 2 of 5 dae by -O.5aC voor bestraling vir 120 uur by of 6aC of 20aC. Vrugte van Ceres wat onmiddellik na oes bestraal is het beter kleur ontwikkel by 6aC as by 20aC. Kleurontwikkeling by vrugte bestraal by 6 of 20aC het nie verskil wanneer vrugte vooraf opgeberg was by -~5ac vir 5 dae nie. Vrugte van Grabouw het konstant beter kleur pntwikkel wanneer bestraling by 6°C eerder as 20°C plaasgevind het. In die volgende eksperiment, was beide die vrugte van Ceres en Grabouw vir 20 dae opgeberg by -o.soC voor bestraling by 6°C of 6°/20°C. Die flukturerende temperatuur regime het afnames van 70° en 65° in kleurskakeringswaarde getoon vir die vrugte van Grabouw en Ceres, respektiewelik. Die afname was kleiner (±200)wanneer vrugte by 6°C bestraal is. 'Cripp's Pink' appels wat goed gekleur was en opgeberg is by 3rC terwyl dit blootgestel is aan HDN ligte vir 144 uur, het 'n toename van 29.30 tot 48.3° getoon vir die kleurskakeringswaarde, en antosianienkonsentrasie het afgeneem van 739 I'g.g-1 tot 283.6 I1g.g-1. Die kontrole vrugte opgeberg by dieselfde temperatuur in die donker het geen verandering in beide die kleurskakeringswaarde of die antosianienkonsentrasie getoon nie. 'Bon Rouge' en 'Red d' Anjou', twee volrooi peerkultivars, is bestraal met HDN ligte vir 72 uur en het geen betekenisvolle verandering in kleur getoon nie. 'Forelle' pere, geoes met of sonder 'n aangehegte stingelsegment, is bestraal met HDN ligte by twee verskillende temperatuur regimes, nl. 20°C of 20/6°C. Die afname in kleurskakeringswaarde is aan vergeling toegeskryf eerder as aan rooikleurontwikkeling. Ter opsomming, die reaksie van appels op na-oes bestraling is beïnvloed deur rypheid en temperatuur, terwyl pere geen reaksie getoon het nie.
Lerud, Ryan M. "Sensors and Portable Instruments for Postharvest Agriculture." PDXScholar, 2019. https://pdxscholar.library.pdx.edu/open_access_etds/4994.
Full textChen, Wei-Chun. "EFFECTIVENESS OF POSTHARVEST SANITATION TREATMENTS ON MICROBIAL LOAD OF BLUEBERRIES." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-10172008-084244/.
Full textVan, Hoorn A. T. (Aaltje Trientje). "Optimisation of blueberry postharvest handling and storage." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/20906.
Full textENGLISH ABSTRACT: By world standards South Africa’s contribution to fresh blueberry production is very small, a mere 0.25 %. This seemingly insignificant and unimpressive statistic is, however, by no means indicative of the impending impressive potential the South African blueberry industry holds. South Africa is encountering a rapid growth phase off a very small base and the current 100-150 ton export crop is expected to increase to a range of 500 to 600 tons or more in the next five years. Consequently, export by sea must be considered as a logistic alternative. Seafreight success relies on controlled atmosphere storage which in turn relies on berries of exceptional quality. To achieve this, fundamental differences between blueberry cultivars must be examined and blueberry handling and storage regimes must be assessed and optimised. This study investigates the storage potential of certain rabbiteye blueberries relative to controlled atmospheres and short pre-cooling delays. Quality assessments were based on external colour, soluble solids, titratible acidity, firmness and decay development. Furthermore, the respiration and ethylene production rates as well as moisture loss, of various cultivars were determined to characterize fundamental differences amongst cultivars and to gain insight into their postharvest behaviour. Lastly the effect of infection on pigment levels of blueberry flesh and peel was examined for the purpose of laboratory experience. Controlled atmosphere storage had the greatest impact on berry firmness and percentage decay. No off flavours were detected during sensory analysis at the CA levels tested. CAstored berries were firmer and incidence of decay was reduced significantly. Significant decay reduction was challenged by the market tolerance of no more than 2 %. Decay suppression and storage extension was insufficient (for the set period), particularly after the shelf life period. Cultivar and seasonal differences as well as picking maturity and inoculum pressure determine blueberry CA storability. CA may be a valuable technology, however advances must first be made in ensuring optimal blueberry quality to warrant export by sea. Short pre-cooling delays (0, 2, 4, 6 h) at 20 ºC had no effect on colour (L, C, H), total soluble solids, titratable acidity and firmness of blueberry cultivars, ‘Centurion’, ‘Premier’ and ‘Tifblue’. Results for percentage decay indicate that prompt cooling becomes more critical as the duration of storage increases, particularly when market specification of no more than 2 % decay must be met. Berries subjected to longer delays appear to be more susceptible to decay. Differences exist among cultivars and knowledge gained from this research can be used to adapt handling and cooling regimes. Information generated will benefit cultivar selection for marketing (local vs. export), storage (short vs. long term) and logistics (air vs. seafreight). Rabbiteye blueberry cultivars differ considerably in terms of their respiration rate, ethylene production and moisture loss. These quality parameters were evaluated for various cultivars at 15 ºC. ‘Climax’ appears to have the highest respiration rate, ethylene production and moisture loss, whilst ‘Premier’ has the lowest respiration rate and ethylene production was too low to be detected by gas chromatography. The lowest moisture loss proportionality constant was found for ‘Tifblue’ and ‘Centurion’. A change in blueberry flesh colour from white to dark red was noted in infected berries. Artificial inoculation with Botrytis cinerea showed a similar result. The colour change was evaluated by comparing anthocyanin pigment levels (determined by spectrophotometry and HPLC) of the peel and flesh. Anthocyanin content of infected flesh doubled, whilst that of infected peel was less than 50 % of the control. Pigment leakage has been reported in blueberries. It would appear that cell disruption, induced by infection may facilitate migration of anthocyanin from the peel to the flesh. The storage potential of blueberries depends on cultivar, maturity at harvest, climatic conditions as well as the inoculum pressure. Under favourable conditions storage life of blueberries can be manipulated effectively. Further cultivar specific research that targets relevant quality issues should be investigated. Reliable techniques should be developed to quantify blueberry firmness changes. Research on inoculum levels may give insight into the reduction of decay pressure and decay suppressing alternatives such as antibacterial pads can be examined. Peel integrity relative to decay susceptibility can also be researched on a cellular level.
AFRIKAANSE OPSOMMING: Suid-Afrika se bydrae tot wêreld bloubessie produksie is baie klein, ‘n skrale 0.25 %. Hierdie onindrukwekkende statistiek weerspieel egter glad nie die indrukwekkende potensiaal van die Suid-Afrikaanse bloubessie bedryf nie. Die bedryf ondervind tans ‘n dramatiese groei met ‘n klein begin vanaf die huidige 100-150 ton opbrengs tot wat volgens verwagting binne die volgende vyf jaar sal styg tot in die orde van 500-600 ton. Na aanleiding van die verwagte toename in produksie, sal seevrag verskeping oorweeg moet word as alternatief vir uitvoer eerder as lugvrag. Die sukses van seevrag lê in die gebruik van beheerde atmosfeer opberging (BA), waarvan die sukses op sy beurt bepaal word deur bessies van hoogstaande kwaliteit. Om steeds aan die verwagtings van die oorsese mark te voldoen moet grondliggende verskille tussen bloubessie kultivars ondersoek word en daaropvolgend moet hantering en opbergingstelsels aangepas en geoptimeer word. Die navorsing bestudeer die opbergingspotensiaal van verskeie rabbiteye bloubessies relatief tot beheerde atmosfere en kort vertragings in verkoeling. Kwaliteit, gebasseer op eksterne kleur, oplosbare deeltjies, titreerbare sure, fermheid en persentasie bederf, is ondersoek. Die respirasie en etileenproduksie tempos sowel as vogverlies van verskeie kultivars was verder bepaal om die fundamentele verskille tussen kultivars te bepaal, sowel as insig te verwerf in na-oes gedrag. Die effek van infeksie op pigment vlakke van bloubessie vlees en skil was ondersoek vir die doel van laboratorium ondervinding. Beheerde atmosfeer opberging het die grootste effek getoon op bessie fermheid en persentasie bederf. Na aanleiding van sensoriese toetse is daar geen wansmaake aangeteken ten op sigte van die BA vlakke wat getoets is nie. Bessies onderworpe aan beheerde atmosfeeriese toestande was fermer en bederfonderdrukking was beduidend. Die markverdraagsaamheid ten opsigte van bessiebederf, is egter 2 %. Hiervolgens was onderdrukking van verval asook opbergingsvermoë, onvoldoende (spesifiek na die rakleeftyd). Kultivar en seisoenale verskille asook plukrypheid en inokulum druk, bepaal ook die sukses van BA opberging. BA word beskou as ‘n waardevolle tegnologie vir verlenging van opberging. Dit blyk egter dat daar eers ‘n vooruitgang gemaak moet word in die versekering van optimale bessie kwaliteit voordat verskeping oorweeg kan word. Kort vertragings (0, 2, 4, 6 uur by 20 ºC) in verkoeling, het geen invloed gehad op kleur, (L, C, H), totale oplosbare vastestowwe, titreerbare suur en fermheid van bloubessie kultivars ‘Centurion’, ‘Premier’ en ‘Tifblue’ nie. Bederfresultate dui daarop dat onmiddelike verkoeling krities is, veral by verlengde opberging, om aan die 2 % bederf drempelwaarde te voldoen. Bessies onderhewig aan langer vertragings voor verkoeling, blyk meer vatbaar te wees vir bederf. Verskille bestaan tussen kultivars en kennis ingewin tydens hierdie navorsing kan toegepas word om hanteringsprosedures en verkoeling aan te pas. Ingeligte besluitneming kan dus ten opsigte van kultivarspesifieke bemarking (plaaslik en uitvoer), opberging (kort- en langtermyn) en vervoer (lug- en seevrag) gemaak word. Rabbiteye bloubessie kultivars verskil aansienlik ten opsigte van hul respirasietempo, etileenproduksie en vogverlies. Laasgenoemde kwaliteitsbepalers is by verskillende kultivars ondersoek by 15 ºC. ‘Climax’ het die hoogste respirasietempo, etileenproduksie en vogverlies getoon, terwyl ‘Premier’ die laagste respirasietempo gehad het, en die etileenproduksie te laag was om met die gaschromatograaf te bepaal. Die laagste vogverlies proporsionaliteitskonstante is waargeneem tussen ‘Tifblue’ en ‘Centurion’. ‘n Verandering is waargeneem in bloubessie vrugvleeskleur van wit tot donkerrooi by besmette bessies. ‘n Soortgelyke resultaat is verkry met kunsmatige inokulering met Botrytis cinerea. Die kleurverskil is geëvalueer deur vergelyking te tref met die antosianienpigment vlakke tussen die skil en die vlees (bepaal deur spektrofotometrie en HPLC). Antosianieninhoud van besmette vrugvlees het verdubbel, terwyl die van besmette vrugskil minder as 50 % van die kontrole groep was. Pigmentlekkasie is al vermeld by bloubessies. Dit wil voorkom of selskade veroorsaak deur infeksie beweging van antosianien vanaf die skil na die vlees kan aanhelp. Die opbergingspotensiaal van bloubessies hang af van kultivar, rypheid by oes, omgewings toestande sowel as inokulum druk. Onder gunstige toestande kan bloubessies se opbergingsvermoë effektief gemanipuleer word. Verder kultivar-spesifieke navorsing wat relevante kwaliteits kwessies aanspreek, kan gedoen word. Verder kan betroubare tegnieke in die meting van bloubessie fermheid veranderinge ondersoek word. Navorsing ten opsigte van inokulum vlakke mag insig gee in terme van bederf-druk vermindering en die gebruik van bederf-onderdrukking alternatiewe soos anti-bakteriese lappies. Skil integriteit relatief tot bederf-vatbaarheid kan ook op sellulere vlak ondersoek word.
Porter, Kerry Louise. "The postharvest physiology of Chinese cabbage cv. 'Yuki' /." Title page, table of contents and abstract only, 2003. http://web4.library.adelaide.edu.au/theses/09PH/09php8441.pdf.
Full textDelaporte, Kate Louise. "Eucalypts for ornamental horticulture : selection, interspecific hybridisation and postharvest testing /." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09AHP/09hpd338.pdf.
Full textMagwaza, Lembe Samukelo. "Non-destructive prediction and monitoring of postharvest quality of citrus fruit." Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85578.
Full textENGLISH ABSTRACT: The aim of this study was to develop non-destructive methods to predict external and internal quality of citrus fruit. A critical review of the literature identified presymptomatic biochemical markers associated with non-chilling rind physiological disorders. The prospects for the use of visible to near infrared spectroscopy (Vis/NIRS) as non-destructive technology to sort affected fruit were also reviewed. Initial studies were conducted to determine the optimum condition for NIRS measurements and to evaluate the accuracy of this technique and associated chemometric analysis. It was found that the emission head spectroscopy in diffuse reflectance mode could predict fruit mass, colour index, total soluble solids, and vitamin C with high accuracy. Vis/NIRS was used to predict postharvest rind physico-chemical properties related to rind quality and susceptibility of ‘Nules Clementine’ to RBD. Partial least squares (PLS) statistics demonstrated that rind colour index, dry matter (DM) content, total carbohydrates, and water loss were predicted accurately. Chemometric analysis showed that optimal PLS model performances for DM, sucrose, glucose, and fructose were obtained using models based on multiple scatter correction (MSC) spectral pre-processing. The critical step in evaluating the feasibility of Vis/NIRS was to test the robustness of the calibration models across orchards from four growing regions in South Africa over two seasons. Studies on the effects of microclimatic conditions predisposing fruit to RBD showed that fruit inside the canopy, especially artificially bagged fruit, had lower DM, higher mass loss, and were more susceptible to RBD. The study suggested that variations in microclimatic conditions between seasons, as well as within the tree canopy, affect the biochemical profile of the rind, which in turn influences fruit response to postharvest stresses associated with senescence and susceptibility to RBD. Principal component analysis (PCA) and PLS discriminant analysis (PLS-DA) models were applied to distinguish between fruit from respectively, inside and outside tree canopy, using Vis/NIRS signal, suggesting the possibility of using this technology to discriminate between fruit based on their susceptibility to RBD. Results from the application of optical coherence tomography (OCT), a novel non-destructive technology for imaging histological changes in biological tissues, showed promise as a potential technique for immediate, real-time acquisition of images of rind anatomical features of citrus fruit. The study also demonstrated the potential of Vis/NIRS as a non-destructive tool for sorting citrus fruit based on external and internal quality.
AFRIKAANSE OPSOMMING: Die studie het ten doel gestaan om nie-destruktiewe meeting metodes te toets en ontwikkel wat die interne en eksterne-kwaliteit van sitrusvrugte kan voorspel. In ʼn litratuuroorsig is biochemies verandering in die skil en wat geassosieer word met die ontwikkeling van fisiologies skildefekte geïdentifiseer, asook is die moontlikheid ondersoek om Naby Infrarooi spektroskopie (NIRS) as ‘n nie-destruktiewe tegnologie te gebruik om vrugte te sorteer. Eerstens was die optimale toestande waarby NIRS meetings van sitrusvrugte geneem moet word asook die akkuraatheid van die toerusting en chemometrika data-ontleding beproef. Daar is gevind dat die uitstralings-kop spektrofotometer in diffusie-weerkaatsings modus vrugmassa, skilkleur, totale opgeloste stowwe asook vitamien C akkuraat kan voorspel. Daarna van NIRS gebruik om na-oes fisies-chemiese eienskappe wat verband hou met skilkwaliteit en vatbaarheid vir skilafbraak van ‘Nules Clementine’ mandaryn. Deur gebruik te maak van “Partial least squares” (PLS) statistieke was gedemonstreer dat die skilkleur, droë massa (DM), totale koolhidrate en waterverlies akkuraat voorspel kon word. Chemometriese analises het ook getoon dat optimale PLS modelle vir DM, sukrose, glukose en fruktose verkry kan word deur modelle te skep wat gebaseer is op “Multiple scatter correction” (MSC) spektrale voor-verwerking. ʼn Belangrike stap in die ontwikkeling van NIRS gebaseerde indeling is om die robuustheid van die kalibrasiemodelle te toets en was gedoen deur vrugte te meet en sorteer van vier boorde en oor twee seisoene. ʼn Verder eksperiment om die impak van mikroklimaat op die skil se vatbaarheid vir fisiologiese defekte te ontwikkel het getoon dat vrugte wat binne in die blaardak ontwikkel (lae vlakke van sonlig) ʼn laer DM, hoër gewigsverlies het en was ook meer vatbaar vir skilafbraak. Die resultate dui daarop dat verskille in mikroklimaat oor die seisoen asook in die blaardak die skil se biochemiese profiel beïnvloed, wat lei tot ʼn negatiewe reaksie op na-oes stres en verhoogde voorkoms van fisiologiese skilafbraak. Die ontwikkelde “Principal component analysis” (PCA) en PLS-diskriminant analise modelle was daarna suksesvol toegepas om vrugte te skei na NIRS meetings, op die basis van vrugpossies in die blaardak. Nuwe, nie-destruktiewe tegniek, nl. “Optical coherence tomography” (OCT) was suksesvol getoets as manier om ʼn fotografiese beeld te skep van histologiese veranderinge in die skil. Die resultate dui op die potensiaal van die onontginde tegnologie om intak biologiese-materiaal te analiseer. Hierdie studie het getoon dat daar wesenlike potensiaal is om NIRS verder te ontwikkel tot ʼn tegnologie wat gebruik kan word om vrugte te sorteer gebaseer op eksterne (skil) asook interne (pulp) eienskappe
Harmzen, Elrika. "Study of nanofibrous membranes for application in post harvest technology." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86771.
Full textENGLISH ABSTRACT: Grapes are lost annually due to spoilage by Botrytis cinerea. Botrytis cinerea is currently controlled using fungicides and SO2 fumigation in storage rooms but with limited success. Although these techniques have been used for decades they have been associated with numerous of disadvantages. Fungicides are restricted from being used during storage due to legislation and toxicity of the fungicides present on the surface of the berries. SO2 fumigation does not kill the dormant infections present inside the grape tissue and if the SO2 concentration is too high the berries are damaged. During this study two different polymer nanofibrous platforms was synthesized in an attempt to prevent the rotting effect of B. cinerea. The first polymer was modified to yield a polymer with a positively charged quaternized nitrogen moiety, which was subsequently reacted with sodium metabisulfite through an ion exchange process. The modified polymer was electrospun into nanofibrous mats for the benefit of the nanofibers’ high available surface area. A further functionalization was done to increase the quantity of sodium metabisulfite on the surface of the polymer nanofibers. Sodium metabisulfite salt released SO2 gas upon reaction with water vapour present in the atmosphere which resulted in the inhibition of conidial germination of B. cinerea. The second polymer was synthesized and then electrospun into polymer nanofibrous mats followed by chemical modification of the electrospun polymer nanofibers. This post-electrospun modification resulted in the covalent attachment of a fungicide-derivative to the surface of the polymer nanofibers. The fungicide-derivative showed excellent inhibition of B. cinerea mycelium growth. Anti-fungal studies were conducted using the two modified polymer nanofibrous mats against B. cinerea to evaluate these nanofibrous surfaces as B. cinerea inhibiting membranes. Results indicated that B. cinerea conidial germination and mycelium growth were successfully inhibited.
AFRIKAANSE OPSOMMING: Druiwe bederf jaarliks weens die verrottende effek van die fungi Botrytis cinerea. Botrytis cinerea word tans beheer deur gebruik te maak van swamdoders en swaweldioksied (SO2) besproeiings in stoorkamers, maar met beperkte sukses. Alhoewel hierdie tegnieke al vir dekades in gebruik is, word dit geassosieer met verskeie probleme. Die gebruik van swamdoders word in stoorkamers verbied, weens die moontlike skadelike inname daarvan deur die mens aangesien die swamdoders op die druiwe se oppervlakte teenwoordig is. SO2-gasbesproeiings maak nie dormante infeksies binne-in die druiwe self dood nie en indien SO2 -konsentrasies te hoog is kan dit die druiwe beskadig. Tydens hierdie studie is twee verskillende polimeer-nanoveselplatforms gesintetiseer met die doel om die verrottende effek van B. cinerea te voorkom. Die eerste polimeer is aangepas met ’n primêre amienverbinding met die doel dat dit deur ‘n opvolgende modifikasiereaksie verander om sodoende ’n polimeer met ‘n kwatenêre ammoniumgroep te verkry. Die doel van die kwatenêre eienskap is dat ioniese uitruiling plaasvind tussen die anioon van die polimeer en die natruimmetabisulfiet-anioon van die sout. Die voorbereide kopolimeer is geëlektrospin in nanoveselmatte deur middel van die enkelnaald-en-enkelbal-elektrospintegniek om SMI-qC12 nanovesels te lewer wat gefunksionaliseer is. Die nanoveselmatte is na die elektrospinproses verder aangepas om die hoeveelheid natruimmetabisulfiet op die oppervlak van die nanovesels te verhoog. Die natruimmetabisulfiet stel SO2-gas vry sodra dit in aanraking kom met waterdamp in die lug wat ’n beperkende effek op spoorontkieming van B. cinerea tot gevolg het. Die tweede polimeer is voor en na die elektrospinproses gefunksionaliseer met gesintetiseerde organiese verbindings (swamdoder). Die aanpassing van die polimeer met die organiese verbindings het plaasgevind op ‘n kovalente wyse om te verhoed dat die organiese verbinding vrygelaat word tydens gebruik. Die organiese verbindings het effektiewe beperking van miselium-groei getoon. Anti-swamstudies is uitgevoer tussen die twee gefunksionaliseerde polimeer platforms en B. cinerea om die oppervlaktes van die gefunksionaliseerde polimeer/nanovesels te evalueer as B. cinerea beperkende platforms. Resultate het aangetoon dat spoorontkieming en miselium groei van B. cinerea suksesvol beperk is.
Chimphango, Annie F. A. "Diffusion channel system for controlled atmosphere storage of spinach." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=27300.
Full textThis study was geared towards assessing the suitability of the diffusion channels in maintaining a desired gas concentration for CA storage of spinach. Initially, the respiratory behaviour of spinach was studied in gas sealed chambers (replicated four times) stored at four different temperatures, 2$ sp circ$C, 8$ sp circ$C, 15$ sp circ$C and 23$ sp circ$C. The respiration rate of spinach was 20 mgCO$ sb2$/kg.h, 66 mgCO$ sb2$/kg.h, 163 mgCO$ sb2$/kg.h and 271 mgCO$ sb2$/kg.h for 2$ sp circ$C, 8$ sp circ$C, 15$ sp circ$C and 23$ sp circ$C, respectively. A model was developed based on principles of enzymatic kinetics which could reliably predict the respiration rate of spinach at any given storage temperature.
Two other sets of experiments were carried in a cold room set at 2$ sp circ$C. (Abstract shortened by UMI.)
Books on the topic "Postharvest technology"
International Postharvest Science Conference (1996 Taupo, N.Z.). Postharvest 96. Edited by Ferguson I. B, Bieleski R. L. 1931-, Laing William A, Clark C. J, International Society for Horticultural Science., and New Zealand Society for Horticultural Science. Leuven, Belgium: ISHS, 1998.
Find full textA, Kader Adel, ed. Postharvest technology of horticultural crops. 3rd ed. Oakland, Calif: University of California, Agriculture and Natural Resources, 2002.
Find full textMadagascar. Ministère de la production agricole et de la réforme agraire. Service de la méthodologie et du traitement des informations statistiques., Madagascar. Ministère de la production agricole et de la réforme agraire. Direction de la programmation., and Projet recensement national de l'agriculture et système permanent des statistiques agricoles (Madagascar), eds. Enquête sur les pertes de paddy après récolte. [Antanarivo]: Direction programmation, 1987.
Find full textMir, Shabir Ahmad, Manzoor Ahmad Shah, and Mohammad Maqbool Mir, eds. Postharvest Biology and Technology of Temperate Fruits. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76843-4.
Full text1941-, Desai B. B., ed. Postharvest biotechnology of sugar crops. Boca Raton, Fla: CRC Press, 1988.
Find full textL, Shewfelt Robert, and Prussia Stanley Eugene, eds. Postharvest handling: A systems approach. San Diego: Academic Press, 1993.
Find full textXing zheng yuan nong ye wei yuan hui (China), ed. Post-harvest prevention of paddy/rice loss. Taipei, R.O.C: Council of Agriculture, Executive Yuan, Republic of China, 1986.
Find full textF, Lam P., Kosiyachinda S, and ASEAN Food Handling Bureau, eds. Rambutan: Fruit development, postharvest physiology, and marketing in ASEAN. Kuala Lumpur, Malaysia: ASEAN Food Handling Bureau, 1987.
Find full text1963-, Serrano María, ed. Postharvest biology and technology for preserving fruit quality. Boca Raton, FL: Taylor & Francis Group, 2010.
Find full textBook chapters on the topic "Postharvest technology"
Maiti, Ratikanta, Humberto González Rodríguez, Ch Aruna Kumari, and Sameena Begum. "Harvest and Postharvest Technology." In Advances in Sorghum Science, 187–201. First edition.: Apple Academic Press, 2021. http://dx.doi.org/10.1201/9781003127628-10.
Full textManikantan, M. R., R. Pandiselvam, Shameena Beegum, and A. C. Mathew. "Harvest and Postharvest Technology." In The Coconut Palm (Cocos nucifera L.) - Research and Development Perspectives, 635–722. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2754-4_13.
Full textImpaprasert, Rarisara, Zhao Jianrong, George Srzednicki, Yu Lei, and Tao Ruixuan. "Postharvest Technology of Konjac." In Konjac Glucomannan, 161–71. Boca Raton : CRC Press, [2020]: CRC Press, 2020. http://dx.doi.org/10.4324/9780429429927-5.
Full textKumar, Rohitashw, and Vijay P. Singh. "Plastics in Postharvest Management." In Plasticulture Engineering and Technology, 261–82. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003273974-13.
Full textMahajan, B. V. C. "Punjab Horticultural Postharvest Technology Centre." In Postharvest Extension and Capacity Building for the Developing World, 173–84. Boca Raton, Florida : CRC Press, [2019] | Series: World Food Preservation Center book series: CRC Press, 2018. http://dx.doi.org/10.1201/9781315115771-17.
Full textLiang, Peishih. "X-Ray Technology in Postharvest." In Encyclopedia of Digital Agricultural Technologies, 1607–16. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-24861-0_208.
Full textLiang, Peishih. "X-Ray Technology in Postharvest." In Encyclopedia of Smart Agriculture Technologies, 1–10. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-89123-7_208-1.
Full textPaliyath, Gopinadhan, Autar K. Mattoo, Avtar K. Handa, Kalidas Shetty, and Charles L. Wilson. "Enhancing Food Security Through Postharvest Technology." In Postharvest Biology and Nanotechnology, 1–13. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119289470.ch1.
Full textPaull, Robert E., Nancy Jung Chen, and Parson Saradhuldhat. "Pineapple harvesting and postharvest handling." In Handbook of Pineapple Technology, 89–107. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118967355.ch5.
Full textAwasthi, Priya, Subhash Chandra Singh, and Rohit Kumar. "Post-Harvest Technology: An Introduction." In Postharvest Technology of Horticultural Crops, 1–9. London: CRC Press, 2023. http://dx.doi.org/10.1201/9781032627656-1.
Full textConference papers on the topic "Postharvest technology"
Fatmawati, Lahming, Ahmad Rifqi Asrib, and Nurlita Pertiwi. "Farmer’s Behavior in Managing Postharvest in South Sulawesi, Indonesia." In 3rd International Conference on Education, Science, and Technology (ICEST 2019). Paris, France: Atlantis Press, 2020. http://dx.doi.org/10.2991/assehr.k.201027.006.
Full textUcat, Rosanna C., and Jennifer C. Dela Cruz. "Postharvest Grading Classification of Cavendish Banana Using Deep Learning and Tensorflow." In 2019 International Symposium on Multimedia and Communication Technology (ISMAC). IEEE, 2019. http://dx.doi.org/10.1109/ismac.2019.8836129.
Full textAlam, Md Monjurul, Md Rostom Ali, Shibendra Narayan Gope, Md Abdul Awal, and Alex E. Winter-Nelson. "Hermetic Storage Technology to Reduce Postharvest Loss of Paddy: Farmers to Commercial Scale." In 2022 Houston, Texas July 17-20, 2022. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2022. http://dx.doi.org/10.13031/aim.202200252.
Full textYuanhui Gao, Cunkun Chen, Wensheng Wang, and Chenghu Dong. "Effect of ozonated ice treatment on postharvest physiology and biochemistry of Lentinulaedodes." In 2011 International Conference on New Technology of Agricultural Engineering (ICAE). IEEE, 2011. http://dx.doi.org/10.1109/icae.2011.5943910.
Full textPham, Quoc Thien, Hoang Huy Nguyen, and Nai-Shang Liou. "The development of a machine vision system for postharvest processing of achacha fruits." In TOWARD ADAPTIVE RESEARCH AND TECHNOLOGY DEVELOPMENT FOR FUTURE LIFE. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0131760.
Full textWulandari, Sri, Makhmudun Ainuri, and Anggoro Sukartiko. "Biochemical Characteristics of Ground Robusta Coffee under Various Postharvest Technologies and Processing Parameters." In International Conference on Emerging Issues in Technology, Engineering, and Science. SCITEPRESS - Science and Technology Publications, 2021. http://dx.doi.org/10.5220/0010753900003113.
Full textBritz, Steven, Ignas Gaska, Igor Shturm, Yuri Bilenko, Max Shatalov, and Remis Gaska. "Deep Ultraviolet (DUV) Light-Emitting Diodes (LEDs) to Maintain Freshness and Phytochemical Composition During Postharvest Storage." In CLEO: Applications and Technology. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/cleo_at.2013.ath3n.3.
Full textWu, Guifang, Jie Li, Xueyong Jia, Xuehong De, Bo Wang, Kai Xing, and Shubin Yan. "Shelf-life Quality Monitor of Postharvest Tomato Based on Visible/Near Infrared Spectroscopy." In 2022 IEEE 6th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC ). IEEE, 2022. http://dx.doi.org/10.1109/iaeac54830.2022.9929656.
Full textChang, Xuehua. "Design of Postharvest Physiology and Processing System of Fruits and Vegetables based on Intelligent Communication Technology." In 2022 3rd International Conference on Electronics and Sustainable Communication Systems (ICESC). IEEE, 2022. http://dx.doi.org/10.1109/icesc54411.2022.9885636.
Full textShahbani, N. S., H. A. Ismail, S. D. Ramaiya, N. Saupi, I. M. Fakhrulddin, and M. A. Awang. "Determination of fruit maturation and ripening potential on postharvest quality of Passiflora quadrangularis L." In PROCEEDINGS OF 8TH INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS ENGINEERING & TECHNOLOGY (ICAMET 2020). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0051963.
Full textReports on the topic "Postharvest technology"
Aghadi, Crystal N., Bedru Balana, and Adebayo Ogunniyi. Postharvest losses and the impact of reusable plastic container technology on profitability: Evidence from tomato traders in Nigeria. Washington, DC: International Food Policy Research Institute, 2020. http://dx.doi.org/10.2499/p15738coll2.134041.
Full textLichter, Amnon, Joseph L. Smilanick, Dennis A. Margosan, and Susan Lurie. Ethanol for postharvest decay control of table grapes: application and mode of action. United States Department of Agriculture, July 2005. http://dx.doi.org/10.32747/2005.7587217.bard.
Full textChalutz, Edo, Michael Wisniewski, Samir Droby, Yael Eilam, and Ilan Chet. Mode of Action of Yeast Biocontrol Agents of Postharvest Diseases of Fruits. United States Department of Agriculture, June 1996. http://dx.doi.org/10.32747/1996.7613025.bard.
Full textDroby, Samir, Joseph W. Eckert, Shulamit Manulis, and Rajesh K. Mehra. Ecology, Population Dynamics and Genetic Diversity of Epiphytic Yeast Antagonists of Postharvest Diseases of Fruits. United States Department of Agriculture, October 1994. http://dx.doi.org/10.32747/1994.7568777.bard.
Full textFallik, Elazar, Robert Joly, Ilan Paran, and Matthew A. Jenks. Study of the Physiological, Molecular and Genetic Factors Associated with Postharvest Water Loss in Pepper Fruit. United States Department of Agriculture, December 2012. http://dx.doi.org/10.32747/2012.7593392.bard.
Full textBrandl, Maria T., Shlomo Sela, Craig T. Parker, and Victor Rodov. Salmonella enterica Interactions with Fresh Produce. United States Department of Agriculture, September 2010. http://dx.doi.org/10.32747/2010.7592642.bard.
Full textLi, Li, Joseph Burger, Nurit Katzir, Yaakov Tadmor, Ari Schaffer, and Zhangjun Fei. Characterization of the Or regulatory network in melon for carotenoid biofortification in food crops. United States Department of Agriculture, April 2015. http://dx.doi.org/10.32747/2015.7594408.bard.
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