Postharvest Technology
Welcome to Stellenbosch University

Peer Reviewed Journal Publications

2017

  1. Ambaw, A., Dekeyse, D., Vanwalleghem, T., Van Hemelrijck, W., Nuyttens, D., Delele, M.A., Ramon, H., Nicolai, B., Bylemans, D., Opara, U. L. & Verboven, P. (2017). Experimental and numerical analysis of the spray application on apple fruit in a bin for postharvest treatments. Journal of Food Engineering, 202, 34-45.

  2. ​Ambaw, A., Mukama, M. & Opara, U.L. (2017). Analysis of the effects of package design on the rate and uniformity of cooling of stacked pomegranates: Numerical and experimental studies.  Computers and Electronics in Agriculture 136, 13–24

  3. Atukuri, J., Fawole, O.A. & Opara, U.L. (2017). Effect of exogenous fludioxonil postharvest treatment on physiological response, physico-chemical, textural, phytochemical and sensory characteristics of pomegranate fruit. Journal of Food Measurement and Characterization
  4. Belay, Z., Caleb, O.J. & Opara, U.L. (2017). Impacts of low and super-atmospheric oxygen concentrations on quality attributes, phytonutrient content and volatile compounds of minimally processed pomegranate arils (cv. Wonderful). Postharvest Biology and Technology, 124, 119-127.
  5. Berry, T., Fadiji, T.S., Defraeye, T. & Opara, U.L. (2017). The role of horticultural carton vent hole design on cooling efficiency and   compression strength: A multi-parameter approachPostharvest Biology and Technology, 124, 62-74.
  6. Fadiji, T., Berry, T., Coetzee, C. & Opara, U.L. (2017). Investigating the mechanical properties of paperboard packaging material for handling fresh produce under different environmental conditions: Experimental analysis and finit element modelling. Journal of Applied Packaging Research (accepted). 
  7. Getahun, S., Ambaw, A., Delele, M., Meyer, C.J. & Opara, U.L. (2017). Analysis of airflow and heat transfer inside fruit packed refrigerated shipping container: Part I – Model development and validation. Journal of Food Engineering,  In Press.
  8. Getahun, S., Ambaw, A., Delele, M., Meyer, C.J. & Opara, U.L. (2017). Analysis of airflow and heat transfer inside fruit packed refrigerated shipping container: Part II – Evaluation of apple packaging design and vertical flow resistance. Journal of Food Engineering, In Press.  
  9. Magwaza, L.S., Mditshwa, A., Tesfay, S.Z. & Opara, U.L. (2017). An overview of preharvest factors affecting vitamin C content of citrus fruit. Scientia Horticulturae, 216, 12-21.
  10. Mditshwa, A., Fawole, O.A., Vries, F., van der Merwe, K., Crouch, E. & Opara, U.L. (2017). Impact of dynamic controlled atmospheres on reactive oxygen species, antioxidant capacity and phytochemical properties of apple peel (cv. Granny Smith). Scientia Horticulturae, 216, 169–176.
  11. Mditshwa, A., Fawole, O.A., Vries, F., van der Merwe, K., Crouch, E. & Opara, U.L. (2017). Minimum exposure period for dynamic controlled atmospheres to control superficial scald in ‘Granny Smith’ apples for long distance supply chains. Postharvest Biology and Technology, 127, 27–34.
  12. Mditshwa, A., Magwaza, L.S., Tesfay, S.Z. & Opara, U.L. (2017). Postharvest factors affecting vitamin C content of citrus fruits: A review. Scientia Horticulturae218, 95-104.
  13. Munhuweyi, K., Lennox, C.L., Meitz-Hopkins, J., Caleb, O.J., Sigge, G.O. & Opara, U.L. (2017). Investigating the effects of crab shell chitosan on fungal mycelial growth and postharvest quality attributes of   pomegranate whole fruit and arils. Postharvest Biology and Technology (accepted).  
  14. Ncama, K., Opara, U.L., Tesfay, S.Z., Fawole, O.A. & Magwaza, L.S. (2017). Application of Vis/NIR spectroscopy for predicting sweetness and flavour parameters of ‘Valencia’ orange (Citrus sinensis) and ‘Star Ruby’ grapefruit (Citrus x paradisi Macfad) Journal of Food Engineering, 193, 86-94. 

 

2016

  1. Ambaw, A., Bessemans, N., Gruyters, W., Gwanpua, S.G., Schenk, A., De Roeck, A., Delele, M.A., Verboven, P. & Nicolaï, B.M. (2016). Analysis of the spatiotemporal temperature fluctuations inside an apple cool store in response to energy use concerns. International Journal of Refrigeration, 66, 156-168.

  2. Arendse E., Fawole O.A., Magwaza L.S. & Opara, U.L. (2016). Estimation of the density of pomegranate fruit and their fractions using X-ray computed tomography calibrated with polymeric materials. Biosystems Engineering, 148, 148-156.

  3. Arendse, A., Fawole, A.O., Magwaza, L.S. & Opara, U.L. (2016). Non-destructive characterization and volume estimation of pomegranate fruit external and internal morphological fractions using X-ray computed tomography. Journal of Food Engineering, 186, 42-49. 

  4. Belay Z.A., Caleb O.J. & Opara, U.L. (2016). Modelling approaches for designing and evaluating the performance of modified atmosphere packaging (MAP) systems for fresh produce: A reviewFood Packaging and Shelf Life, 10, 1-15.

  5. Berry, T., Defraeye, T., Nicolai, B.M. & Opara, U.L. (2016). Multiparameter Analysis of Cooling Efficiency of Ventilated Fruit Cartons using CFD: Impact of Vent Hole Design and Internal Packaging. Food and Bioprocess Technology, 1-13. 

  6. Cai, J., Chen, L. & Opara, U.L. (2016). Numerical simulation of powder dispersion performance by different mesh types. Key Engineering Materials, 680, 82-85.
  7. Delele, M.A., Nuyttens, D., Ambaw, A., Duga, A.T., Lebeau, F., Nicolai, B.M. & Verboven, P.  (2016). Predicting the dynamic impact behaviour of liquid droplets on plant surfaces, Soft Matter, 12, 7195-7211.

  8. Fadiji, T., Coetzee, C., Chen, L., Chukwu, O. & Opara, U.L. (2016). Susceptibility of apples to bruising inside ventilated corrugated paperboard packages during simulated transport damage. Postharvest Biology and Technology, 118, 111–119.   

  9. Fadiji, T., Coetzee, C. & Opara, U.L. (2016). Compression strength of ventilated corrugated paperboard packages: Numerical modelling, experimental validation and effects of vent geometric design. Biosystems Engineering, 151, 231-247. 

  10. Fadiji, T., Coetzee, C., Pathare, P. & Opara, U.L. (2016). Susceptibility to impact damage of apples inside ventilated corrugated paperboard packages: Effects of package design. Postharvest Biology and Technology, 111, 286–296.

  11. Fawole, A.O. & Opara, U.L. (2016). Stability of total phenolic concentration and antioxidant capacity of extracts from pomegranate co-products subjected to in vitro digestion. BMC Complementary and Alternative Medicine, 16, 358. 

  12. Hu M.-H., Dong Q.-L., Liu B.-L. & Opara, U.L. (2016). Prediction of mechanical properties of blueberry using hyperspectral interactance imaging. Postharvest Biology and Technology, 115, 122-131.   

  13. Magwaza, L. S., Terry, L. & Opara, U.L. (2016). Rapid methods for extracting and quantifying phenolic compounds in citrus rinds. Food Science and Nutrition, 4(1), 4–10. 

  14. Mditshwa, A., Fawole, O.A., Filicity, V., van der Merwe, K., Elke, C. & Opara, U.L. (2016). Classification of ‘Granny Smith’ apples with different levels of superficial scald severity based on targeted metabolites and discriminant analysis. Journal of Applied Botany and Food Quality, 89, 49-55. 

  15. Mphahlele, R.R., Fawole O.A. & Opara, U.L. (2016). Effect of extraction method on chemical, volatile composition and antioxidant properties of pomegranate juiceSouth African Journal of Botany, 103, 135–144. 

  16. Mphahlele R.R., Fawole O.A., Makunga N.P. & Opara U.L. (2016). Effect of drying on the bioactive compounds, antioxidant, antibacterial and antityrosinase activities of pomegranate peel. BMC Complementary and Alternative Medicine, 16(143).

  17. Mphahlele R.R., Caleb O.J., Fawole O.A. & Opara U.L. (2016). Effects of different maturity stages and growing locations on changes in chemical, biochemical and aroma volatile composition of 'Wonderful' pomegranate juice. Journal of the Science of Food and Agriculture, 96(3), 1002-1009.

  18. Mphahlele, R.R., Fawole, O.A. & Opara, U.L. (2016). Influence of packaging system and long term storage on physiological attributes, biochemical quality, volatile composition and antioxidant properties of pomegranate fruit. Scientia Horticulturae, 211, 140-151.

  19. Munhuweyi, K., Lennox, C.L., Meitz-Hopkins, J.C., Caleb, O.J. & Opara, U.L. (2016). Major diseases of pomegranate (Punica granatum L.), their causes and management—A review.  Scientia Horticulturae, 211(1), 126-139.

  20. Munhuweyi, K., Sigge, G.O. & Opara, U.L. (2016). Postharvest losses of cabbages from retail to consumer and the socio-economic and environmental impacts. British Food Journal, 118(2), 286-300.  

  21. Opara. U.L., Hussein, Z. & Caleb, O.J. (2016). Phytochemical properties and antioxidant activities of minimally processed “Acco” pomegranate arils as affected by perforation-mediated modified atmosphere packaging. Journal of Food Processing and Preservation.

  22. Opara, U.L. Uchechukwu-Agua, A.D. & Caleb, O.J. (2016). Evaluating the impacts of selected packaging materials on the quality attributes of cassava flour (cvs. TME 419 and UMUCASS 36). Journal of Food Science, 81(2), C324-31. 

  23. Pathare, P.B., Berry, T.M. & Opara, U.L. (2016). Changes in moisture content and compression strength during storage of ventilated corrugated packaging used for handling apples. Packag. Res. 1, 1–6.

  24. Van dael, M., Lebotsa, S., Herremans, E., Verboven, P., Sijbers, J., Opara, U.L., Cronje, P. & Nicolai, B. (2016). A segmentation and classification algorithm for online detection of internal disorders in citrus using X-ray radiographs. Postharvest Biology and Technology, 112, 205-214. 


2015​

  1. ​Arendse, E., Fawole, O.A. & Opara, U.L. (2015). Discrimination of pomegranate fruit quality by instrumental and sensory measurements during storage at three temperature regimes. Journal of Food Proces​​sing and Preservation, 39(6), 1867–1877. 

  2. Arendse E., Fawole O.A. & Opara U.L. (2015). Effects of postharvest handling and storage on physiological attributes and quality of pomegranate fruit (Punica granatum L.): A review. International Journal of Postharvest Technology and Innovation, 5(1).

  3. Banda, K., Caleb, O. J., Jacobs, K. & Opara, U.L. (2015). Effect of active-modified atmosphere packaging on the respiration rate and quality of pomegranate arils (cv. Wonderful). Postharvest Biology and Technology, ​109, 97–105. 

  4. Berry, T.M., Delele, M.A., Griessel, H. & Opara, U.L. (2015). Geometric Design Characterisation of Ventilated Multi-scale Packaging Used in the South African Pome Fruit Industry. Agric. Mech. Asia, Africa, Lat. Am. 46, 1–19.

  5. Caleb, O. J., Aindongo, W. V., Opara, U.L. & Mokwena, L. (2015). Effect of pre-treatment and modified atmosphere packaging on quality attributes and volatile composition of pomegranate arils ('Bhagwa')​​. Acta Horticulturae, (1079​), 165–171. 

  6. Caleb, O. J., Fawole, O.A., Mphahlele, R.R. & Opara, U. L. (2015). Impact of preharvest and postharvest factors on changes in volatile compounds of pomegranate fruit and minimally processed arils - ReviewScienti​​a Horticulturae, 188, 106–114. 

  7. Defraeye, T., Cronjé, P., Berry, T., Opara, U.L., East, A., Hertog, M., Verboven, P. & Nicolaï, B. (2015). Towards integrated performance evaluation of future packaging for fresh produce in the cold chain. Trends ​in Food Science & Technology, 44 (August), 201–225. 

  8. Defraeyea, T., Cronjé, P., Verboven, P., Opara, U.L. & Nicolaï, B. (2015). Exploring ambient loading of citrus fruit into reefer containers for cooling during marine transport using computational fluid dynamics. Postharvest Biology and Technology, 108, 91–101. 

  9. Defraeye, T., Verboven, P., Opara, U.L., Nicolaï, B. & Cr​onjé, P. (2015). Feasibility of ambient loading of citrus fruit into refrigerated containers for cooling during marine transport. Biosystems Engineering, 134(0), 20–30.

  10. Hu, M. H., Dong, Q. L., Liu, B. L., Opara, U.L. & Chen, L​. (2015). Estimating blueberry mechanical properties based on random frog selected hyperspectral data. Postharvest Biology and Technology, 106, 1–10. 

  11. Hussein, Z., Caleb, O. J., Jacobs, K., Manley, M. & Opara​, U.L. (2015). Effect of perforation-mediated modified atmosphere packaging and storage duration on physicochemical properties and microbial quality of ​fresh minimally processed "Acco" pomegranate arils. LWT - Food Science and Technology, 64(2), 911–918.

  12. Hussein, Z., Caleb, O. J. & Opara, U.L. (2015). Perforation-mediated modified atmosphere packaging of fresh and minimally processed produce - A review. Food Packaging and Shelf Life, 6, 7–20. 

  13. Magwaza, L.S. & Opara, U.L. (2015). Analytical methods for determination of sugars and sweetness of horticultural products - A reviewScientia Horticulturae, 184, 179–192. 

  14. Magwaza, L.S., Terry, L. & Opara, U.L. (2016). Rapid methods for extracting and quantifying phenolic compounds in citrus rinds. Food Science and Nutrition, 4(1), 4–10.

  15. Mditshwa, A., Vries, F., Van der Merwe, K., Crouch, E. ​& Opara, U​. L. (2015). Antioxidant content and phytochemical properties of apple "Granny Smith" at different harvest times. South African Journal of Plant and Soil, (August), 1–6. 

  16. O'Grady, L., Sigge, G.O., Caleb, O. J. & Opara, U.L.  (2015). Effects of water dipping of whole fruit on the microbial quality of minimally processed pomegranate (Punica granatum L .) arils during cold storage. International Journal of Postharvest Technology and Innovation, 5(1), 1–7. 

  17. Opara U.L., Atukuri J., Fawole O.A. (2015). Application of physical and chemical postharvest treatments to enhance storage and shelf life of pomegranate fruit-A review. Scientia Horticulturae, 197, 41-49.

  18. Opara, U. L., Hussein, Z., Caleb, O. J. & Mahajan, P. V. (2015). Investigating the effects of perforation and storage temperature on water vapour transmission rate of packaging films: experimental and modelling approaches, 22(9), 498–509.

  19. Uchechukwu-Agua, A. D., Caleb, O. J., Manley, M. & Opara, U. L. (2015). Effects of storage conditions and duration on physicochemical and microbial quality of the flour of two cassava cultivars (TME 419 and UMUCASS 36). CyTA - Journal of Food, 6337(September), 1–11. 

  20. Uchechukwu-Agua, A. D., Caleb, O. J. & Opara, U. L. (2015). Postharvest handling and storage of fresh cassava root and products: A reviewFood and Bioprocess Technology, 8(4), 729–748. 


2014

  1. Aindongo, W.V., Caleb, O.J., Mahajan, P.V., Manley, M. & Opara, U.L. (2014). Effects of storage conditions on transpiration rate of pomegranate aril-sacs and arils. South African Journal of Plant and Soil, 31(1), 7-11. ​     ​

  2. Aindongo, W.V., Caleb, O.J., Mahajan, P.V., Manley, M. & Opara, U.L. (2014). Modelling the effects of s​torage temperature on the respiration rate of different pomegranate fractionsSouth African Journal of Plant and Soi​l, 1–5.                                          

  3. Ambaw, A., Verboven, P., Delele, M.A., Defraeye, T., Tijskens, E., Schenk, A., Verlinden, B.E., Opara, U.L. & Nicolaï, B.M. (2014). CFD-Based analysi​s of 1-MCP distribution in commercial cool store rooms: Porous medium model application. Food and Bioprocess Technology, 7, 1903-1916. 

  4. ​Arendse, E., Fawole, O.A. & Opara, U.L. (2014). Effects of postharvest storage co​nditions on phytochemical and radical-scavenging activity of pomegranate fruit (cv. Wonderful)Scientia Horticulturae, 169, 125–129.                  

  5. Arendse, E., Fawole, O.A. & Opara, U.L. (2014). Influence of storag​​​e temperature and duration on postharvest physico-chemical and mechanical properties of pomegranate fruit and arils. CyTA - Journal of Food, 1​2(4).  

  6. Defraeye, T., Lambretch, R., Tsige, A.A., Delele, ​M.A., Opara, U.L., Cronjé, P., Verboven, P. & Nicolaï, B. (2014). Forced-convective cooling of citrus fruit: cooling conditions and energy consumption in relation to package design. Journal of Food Engineering, 121, 118-127. 

  7. Fawole, O.A. & Opara, U.L. (2014). Physicomechanical, phyt​​ochemical, volatile compounds and free radical scavenging properties of eight pomegranate cultivars and classification by principal component and cluster analyses. British Food Journal, 116(3), 544-567.  

  8. Lu, X., Chen, L., Heng, R., Cheng, Y. & Opara, U.L. (2014). Influence of mixing environmental conditions on flowability of lactose blends, Key Engineering Materials, 633, 3-6. 

  9. Magwaza, L.S., Landahl, S., Cronjé, P.J.R., Nieuwoudt, H.H., Mouazen, A.M., Nicolaï, B.M., Terry, L.A. & Opara, U.L. (2014). The use of Vis/NIRS and chemometric analysis to predict fruit defects and postharves​t behaviour of 'Nules Clementine' mandarin fruit. Food Chemistry, 163, 267–274.

  10. Magwaza, L.S. & Opara, U.L. (2014). Investigating non-destructive quantification and characterisation of pomegranate fruit internal structure using X-ray computed tomography. Postharvest Biology and Technology, 95: 1–6.  
  11. Magwaza, L.S., Opara, U.L., Cronjé, P.J.R., Landahl, S., Nieuwoudt, H.H., Mouazen, A.M., Nicolaï, B.M. & Terry, L.A. (2014). Assessment of rind quality of 'Nules Clementine' mandarin fruit during postharvest storage: 1. Vis/NIRS PCA models and relationship with canopy position. Scientia Horticulturae, 165: 410–420. 

  12. Magwaza L.S., Opara U.L., Cronje P.J.R., Landahl S., Nieuwoudt H.H., Mouazen A.M., Nicolai B.M. & Terry L.A. (2014). Assessment of rind quality of 'Nules Clementine' mandarin fruit during postharvest storage: 2. Robust Vis/NIRS PLS models for prediction of physico-chemical attributes. Scientia Horticulturae, 165

  13. Mahajan, P.V., Caleb, O.J., Singh, Z., Watkins, C.B. & Geyer, M. (2014). Postharvest treatments of fresh produce. Philosophical Transactions of the Royal Society A. 372: 1-19. 

  14. McHenry, M.P., Doepel, D., Onyango, B.O. & Opara U.L. (2014). Small-scale portable photovoltaic-battery-LED systems with submersible LED units to replace kerosene-based artisanal fishing lamps for Sub-Saharan African lakes. Renewable Energy, 62: 276-284.    

  15. Mphahlele, R.R., Fawole, O.A. & Opara, U.L. (2014). Preharvest and postharvest factors influencing bioactive compounds in pomegranate (Punica granatum L.) - A review. Scientia Horticulturae, 178: 114–123.   

  16.  Mphahlele, R.R., Stander, M.A., Fawole, O.A. & Opara U.L. (2014). Effect of fruit maturity and growing location on the postharvest contents of flavonoids, phenolic acids, vitamin C and antioxidant activity of pomegranate juice (cv. Wonderful)Scientia Horticulturae, 179: 36-45. 

  17. O'Grady, L., Sigge, G., Caleb, O.J. & Opara, U.L. (2014). Effects of storage temperature and duration on chemical properties, proximate composition and selected bioactive components of pomegranate (Punica granatum L.) arils. LWT - Food Science and Technology, 57(2): 508–515.  

  18. O'Grady, L., Sigge, G., Caleb, O.J. & Opara, U.L. (2014). Bioactive compounds and quality attributes of pomegranate arils (Punica granatum L.) processed after long-term storage. Food Packaging and Shelf life, 2:​ 30-37.   

  19. Opara, U.L. & Pathare, P.B. (2014). Bruise damage measurement and analysis of fresh horticultural produce – A review. Postharvest Biology and Technology, 91: 9-24. 

  20. ​Pathare, P.B. & Opara, U.L. (2014). Structural design of corrugated boxes for horticultural produce: A review. Biosystems Engineering, 125: 128-140.  

  21. Opara, U.L. (2014). Perspective: The evolving dimensions and perspectives on food security – what implications for postharvest research, policy and practice? International Journal of Postharvest Technology and Innovation, 3(3), 324–332.


2013

  1. ​Al-Said, F. A., Al-Yahyai, R.A. & Opara, U. L. (2013). Traditional Cultivation of Pomegranate in Oman. Acta horticulturae . 

  2. Ambaw, A., Delele, M.A., Defraeye, T., Ho, Q.T., Opara, L.U., Nicolaï, B.M. & Verboven, P. (2013). The use of CFD to characterize and design post-harvest storage facilities: Past, present and future. Computer and Electronics in Agriculture, 93, 184–194. 

  3. Ambaw, A., Verboven, P., Defraeye, T., Tijskens, E., Schenk, A., Opara, U.L. & Nicolaï, B.M. (2013). Porous medium modeling and parameter sensitivity analysis of 1-MCP distribution in boxes with apple fruit. Journal of Food Engineering, 119, 13–21. 

  4. Ambaw, A., Verboven, P., Defraeye, T., Tijskens, E., Schenk, A., Opara, U.L. & Nicolaï, B.M. (2013). Effect of box materials on the distribution of 1-MCP gas during cold storage: a CFD study. Journal of Food Engineering, 119, 150–158. 

  5. Berry, T., Delele, M. A., Opara, U. L. & Cronjé, P. J. R. (2013). Spatial variation of fruit cooling rate and relative humidity inside “Super-vent” packaging for citrus during static coolingActa Horticulturae, 1007, 207–213.​

  6. Caleb, O.J., Opara, U.L., Pramod, P.V., Manley, M., Mokwena, L. & Tredoux, A.G.J. (2013). Effect of modified atmosphere packaging and storage temperature on volatile composition and postharvest life of minimally-processed pomegranate arils (cvs. 'Acco' and 'Herskawitz')Postharvest Biology and Technology, 79, 54-61 

  7. Caleb, O.J., Pramod, P.V., Al-Said, F.A.J. & Opara, U.L. (2013). Modified atmosphere packaging technology of fresh and fresh-cut produce and the microbial consequences - A review. Food and Bioprocess Technology, 6(2), 303-329.   

  8. Caleb, O.J., Pramod, P.V., Al-Said, F.A.J. & Opara, U.L. (2013). Transpiration rate and quality of pomegranate arils as affected by storage conditions. CyTA Journal of Food 11(3), 199-207. 

  9. Caleb, O.J., Pramod, P.V., Manley, M. & Opara, U.L. (2013). Evaluation of parameters affecting modified atmosphere packaging engineering design for pomegranate arils. International Journal of Food Science and Technology, 48, 2315–2323. 

  10. Chen, L., Heng, R., Delele, M.A., Cai, J., Du, D. & Opara, U.L. (2013). Investigation of dry powder aerosolization mechanisms in different channel designs. International Journal of Pharmaceutics, ​​457(1), 143-149. 

  11. Chen, L. & Opara, U.L. (2013). Approaches to analysis and modeling texture in fresh and processed foods - A review. Journal of Food Engineering, 119(3), 497-507 

  12. Chen, L. & Opara, U.L. (2013). Texture measurement approaches in fresh and processed foods - A review. Food Research International 51(2), 823–835 

  13. Defraeye, T., Lambretch, R., Tsige, A.A., Delele, M.A., Opara, U.L., Cronjé, P., Verboven, P. & Nicolaï, B. (2013). Forced-convective cooling of citrus fruit: package design. Journal of Food Engineering 118(1), 8-18                                                                                                                     

  14. Delele, M.A., Ngcobo, M.E.K., Getahun, S., Chen, L., Mellmann, J. & Opara, U.L. (2013). Studying airflow and heat transfer characteristics of horticultural produce packaging system using 3-D CFD model, part I: model development and validation. Postharvest Biology and Technology, 86, 536-545. ​

  15. Delele, M.A., Ngcobo, M.E.K., Getahun, S., Chen, L., Mellmann, J. & Opara, U.L. (2013). Studying airflow and heat transfer characteristics of a horticultural produce packaging system using 3-D CFD model, part II: effect of package design. Postharvest Biology and Technology, 86, 546-555. ​​

  16. Delele, M.A., Ngcobo, M.E.K., Opara, U.L. & Meyer, C.J. (2013). Investigating the effects of table grape package components and stacking on airflow, heat and mass transfer using 3-D CFD modelling. Food and Bioprocess Technology 6(9), 2571-2585.  

  17. Fawo​le, O.A. & Opara, U.L. (2013). Changes in physical properties, chemical and elemental composition and antioxidant capacity of pomegranate (cv. Ruby) fruit at five maturity stages. Scientia Horticulturae, 150(4), 37-46. 

  18. Fawole, O.A. & Opara, U.L. (2013). Developmental changes in maturity indices of pomegranate fruit: A descriptive review. Scientia Horticulturae, 159, 152–161.  ​

  19. Fawole, O.A. & Opara, U.L. (2013). Effects of maturity status on biochemical content, polyphenol composition and antioxidant capacity of pomegranate fruit arils (cv. 'Bhagwa')South African Journal of Botany, 85, 23–31. 

  20. Fawole, O.A. & Opara, U.L. (2013). Effects of storage temperature and duration on physiological responses of pomegranate fruit. Industrial Crops and Products, 47, 300 – 309. 

  21. Fawole, O.A. & Opara, U.L. (2013). Fruit growth dynamics, respiration rate and physico-textural properties during pomegranate development and ripening. Scientia Horticulturae, 157, 90-98. 

  22. Fawole, O.A. & Opara, U.L. (2013). Harvest discrimination of pomegranate fruit: postharvest quality changes and relationships between instrumental and sensory attributes during shelf lifeJournal of Food Science, 78(8), S1264-72.  

  23. Fawole, O.A. & Opara, U.L. (2013). Seasonal variation in chemical composition, aroma volatiles and antioxidant capacity of pomegranate during fruit development. African Journal of Biotechnology, 12(25), 4006-4019. 

  24. Fawole, O. A., Opara, U. L., & Theron, K. I. (2013). Influence of fruitdevelopmental and maturity stages on chemical, phytochemical and antioxidantproperties of pomegranate juice. Acta Horticulturae, 1007, 461–470. ​

  25. Ho, Q.T., Carmeliet, J., Datta, A.K., Defraeye, T., Delele, M.A., Herremans, E., Opara, U.L., Ramon, H., Tijskens, E., Van der Sman, R., Van Liedekerke, P., Verboven, P. &  Nicolaï, B.M. (2013). Multiscale modeling in food engineering. Journal of Food Engineering, 114(3), 279–291. 

  26. Magwaza, L.S., Opara, U.L., Cronjé, P.J.R., Landahl, S. & Terry, L.A. (2013). Canopy position affects rind biochemical profile of 'Nules Clementine' mandarin fruit during postharvest storage. Postharvest Biology and Technology, 86, 300–308. 

  27. Magwaza, L.S., Opara, U.L., Cronjé, P.J.R., Terry, L.A., Landahl, S. & Nicolaï, B.M. (2013) Non-chilling physiological rind disorders in citrus fruit. Horticultural Reviews, 41, 131-175.  ​                  

  28. Magwaza, L. S., Opara, U. L., Nieuwoudt, H. H., Cronjé, P. J. R., Landahl, S. & Terry, L. A. (2013). Quantifying the effects of fruit position in the canopy on physical and biochemical properties and predicting susceptibility to rind breakdown disorder of "Nules Clementine" mandarin (Citrus reticulate Blanco) using Vis/NIR spectroscopy. Acta Horticulturae, 1007, 83–92.

  29. Magwaza, L.S., Opara, U.L., Tatam, R., Cronjé, P., Landahl, S. & Ford, H. (2013). Application of Optical Coherence Tomography to Non-destructively Characterise Rind Breakdown Disorder of 'Nules Clementine' Mandarins. Postharvest Biology and Technology, 84, 16-21. 

  30. Magwaza, L.S., Opara, U.L., Terry, L.A., Landahl, S., Cronjé, P.J.R., Nieuwoudt, H.H., Hanssens, A., Saeys, W. & Nicolaï, B.M. (2013). Evaluation of Fourier transform-NIR spectroscopy for integrated external and internal quality assessment of Valencia oranges. Journal of Food Composition and Analysis, 31(1), 144-154.  

  31. Mditshwa, A., Opara, U.L., Fawole, O.A., Al-Said, F. & Al-Yahyai, R. (2013). Phytochemical content, antioxidant capacity and physico-chemical properties of pomegranate grown in different micro-climates in South Africa. South African Journal of Plant and Soil, 30(2), 81-90. 

  32. Ngcobo, M.E.K., Delele, M.A., Chen, l. & Opara, U.L. (2013). Investigating the potential of a humidification system to control moisture loss and quality of 'Crimson Seedless' table grapes during cold storage. Postharvest Biology and Technology, 86, 201-211.  ​

  33. Ngcobo, M.E.K., Delele, M.A., Opara, U.L & Meyer, C.J. (2013). Performance of multi-packaging for table grapes based on airflow, cooling rates and fruit quality. Journal of Food Engineering116(2), 613–621. 

  34. Ngcobo, M.E.K., Delele, M.A., Opara, U.L., Thiart, G.D. & Meyer, C.J. (2013). Heat transfer and external quality attributes of "regal seedless" table grapes inside multi layered packaging during postharvest cooling and storage. Acta Horticulturae, 1007, 189–196.​

  35. Ngcobo, M.E.K., Pathare, P., Delele, M.A. & Opara, U.L. (2013). Moisture diffusivity of table grape stems during postharvest handling and storage at low temperature conditions. Biosystems Engineering, 115, 346-353. 

  36. Opara, U.L. & Mditshwa, A. (2013). The role of packaging in securing the food system: Adding value to food products and reducing losses and waste: A review. African Journal of Agricultural Research, 8(22), 2621-2630. 

  37. Opara, U.L., Yahyai, R., Al-Waili, N., Al-Said, F., Al-Ani, M., Manickavasagan, A. & Al-Mahdouri, A. (2013). Postharvest responses of 'Malindi' cavendish banana to various storage conditions. International Journal of Fruit Science, 13, 373–388.

  38. Pathare, P.B., Opara, U.L. & Al-Said, F.A.J. (2013). Colour measurement and analysis in fresh and processed foods: A review. Food and Bioprocess Technology, 6(1), 36-60.   ​​

  39. Opara, U.L. (2013). Successful mechanisation of smallholder agriculture – opportunities for cooperation and partnership between Africa and Japan. Agricultural Mechanization in Asia, Africa and Latin America, 44(4), 27-30.

  40. Opara, U.L. (2013). The urgent need for African leadership in Science, Engineering and Technology to transform African agriculture into agri-food value chains (Guest Editorial). African Journal of Food, Agriculture, Nutrition and Development, 13(4), 1-12. 

  41. Opara, U.L. (2013). Editorial: What's next in Postharvest Technology? International Journal of Postharvest Technology and Innovation, 3(3), 217-218.

  42. Opara, U.L. (2013). Editorial: Postharvest – proposal to standardise the terminology, International Journal of Postharvest Technology and Innovation, 3(2), 105-108.

  43. Opara, U.L. (2013). Perspective: The role of universities in transforming African agriculture for economic development – producing knowledge farmers and entrepreneurial leaders. International Journal of Postharvest Technology and Innovation, 3(2), 207-215.

  44. Opara, U.L. (2013). Perspective: Investing in research and promoting trade are critical for Africa's agricultural transformation. International Journal of Postharvest Technology and Innovation, 3(1), 97-103. 

  45. Opara, U.L. (2013). Perspective: The evolving dimensions and perspectives on food security – what implications for postharvest research, policy and practice? International Journal of Postharvest Technology and Innovation, 3(3), 324–332.

  46. Opara, U.L. (2013). Professor Emeritus Adel A. Kader (1941–2012), a golden era in postharvest education, research and practice, International Journal of Postharvest Technology and Innovation, 3(1), 1-4.


2012

  1. Caleb, O.J., Pramod, P.V., Opara, U.L. & Witthuhn, C.R. (2012). Modelling the respiration rates of pomegranate fruit and arils. Postharvest Biology and Technology, 64(1), 49-54. ​​

  2. Caleb, O.J., Pramod, P.V., Opara, U.L. & Witthuhn, C.R. (2012). Modeling the effect of time and temperature on respiration rate of pomegranate arils (cv. "Acco" and "Herskawitz"). Journal of Food Science, 77(4), E80–E87. 

  3. Caleb, O.J., Pramod, P.V., Opara, U.L. & Witthuhn, C.R. (2012). Modified atmosphere packaging of pomegranate fruit and arils: A review. Food and Bioprocess Technology, 5(1), 15-30. 

  4. Delele, M.A., Vorstermans, B., Creemers, P., Tsige, A.A., Tijskens, E., Schenk, A., Opara, U.L., Nicolaï, B.M. & Verboven, P. (2012). CFD model development and validation of a thermonebulisation fungicide fogging system for postharvest storage of fruit. Journal of Food Engineering, 108(1), 59-68.       

  5. Delele, M.A., Vorstermans, B., Creemers, P., Tsige, A.A., Tijskens, E., Schenk, A., Opara, U.L., Nicolaï, B.M. & Verboven, P. (2012).​ Investigating the performance of thermonebulisation fungicide fogging system for loaded fruit storage room using CFD model. Journal of Food Engineering, 109(1), 87-97. 

  6. Fawole, O.A., Makunga, N.P. & Opa​ra, U.L. (2012). Antibacterial, antioxidant and tyrosinase-inhibition activities of pomegranate fruit peel methanolic extract. BMC Complementary and Alternative Medicine. 12, 200.  

  7. Fawole, O.A. & Opara, U.L. (2012). Composition of trace and major minerals in different parts of pomegranate (Punica granatum) fruit cultivars. British Food Journal 114(11), 1518-1532. 

  8. Fawole​, O.A., Opara, U.L. & Theron, K.I. (2012). Chemical and phytochemical properties and antioxidant activities of three pomegranate cultivars grown in South Africa. F​​ood Bioprocess and Technology, 5(2), 425-444. 

  9. Magwaza, L.S., Opara, U.L., Nieuwoudt, H.H., Cronjé, P.J.R., Saeys, W. & Nicolaï, B. (2012). NIR Spectroscopy applications for internal and external quality analysis of citrus fruit - A review. Food and Bioprocess Technology, 5(2), 425-444. 

  10. Magwaza, L.S., Opara, U.L., Terry, L.A., Landahl, S., Cronjé, P.J.R., Nieuwoudt, H.H., Mouazen, A.B., Saeys, W. & Nicolaï, B. (2012). Prediction of 'Nules Clementine' mandarin susceptibility to rind breakdown disorder using Vis/NIR spectroscopy. Postharvest Biology and Technology, 74, 1-10. 

  11. Ngcobo, M.E.K., Delele, M.A., Opara, U.L., Zietsman, C.J. & Meyer, C.J. (2012). Resistance to airflow and cooling patterns through multi-scale packaging of table grapes. International Journal of Refrigeration, 35(2), 445–452. 

  12. Ngcobo, M.E.K., Delele, M., Pathare, P.B., Chen, L., Opara, U.L. & Meyer, C.J. (2012). Moisture loss characteristics of fresh table grapes packed in different film liners during cold storage. Biosystems Engin​eering, 113(4), 363-370. 

  13. Ngcobo, M.E.K., Opara, U.L. & Thiart, G.D. (2012). Effects of packaging liners on cooling rate and quality attributes of table grape (cv. Regal Seedless). Packaging Technology and Science, 25(2), 73–84. 

  14. Opara, U.L., Al-Ani, M.R. & Al-Rahbi, N.M. (2012). Effect of fruit ripening stage on physico-chemical properties, nutritional composition and antioxidant components of tomato (Lycopersicum esculentum) cultivars. Food and Bioprocess Technology, 5(8), 3236-3243. 

  15. Opara, U.L., Al-Yahyai R., Al-Waili, N., Al-Said, F., Al-Ani, M., Manickavasagan, A. & Al-Mahdouri, A. (2012). Effect of storage conditions on physico-chemical attributes and physiological responses of 'milk' (Musa spp., AAB group) banana during fruit ripening. International Journal of Postharvest Technology and Innovation, 2(4), 370-386.                                                                                        

  16. ​​​​Pathare, P.B., Opara, U.L., Vigneault, C., Delele, M. & Al-Said, F.A. (2012). Design of packaging vents for cooling fresh horticultural produce. Food and Bioprocess Technology, 5(6), 2031-2045. 

  17. Opara, U.L. (2012). The need for a professional network of agricultural and biosystems engineers in Africa. International Journal of Postharvest Technology & Innovation, 2(4), 426-432.

  18. Opara, U.L. (2012). Editorial: The future of postharvest research and education and implications for Africa‘s Green Revolution. International Journal of Postharvest Technology & Innovation, 2(4), 329-333. 

2011

  1. Fawole O.A., Opara L.U. & Theron K.I. (2011). Chemical and Phytochemical Properties and antioxidant activity of three pomegranate cultivars grown in South Africa, Food Bioprocess Technology, 5(7), 2934–2940.
  2. Opara, U.L. (2011). Editorial: The urgent need to transform small-scale subsistence farming in Africa towards sustainable agribusiness value-chains. International Journal of Postharvest Technology and Innovation, 2(2).
     

2010​​

  1. ​Opara, U.L. & Al-Ani, M.R. (2010). Antioxidant contents of pre-packed fresh-cut versus whole fruit and vegetables. British Food Journal, 112(8), 797–810. 

  2. Opara, U.L. & Al‐Ani, M.R. (2010). Effects of cooking methods on carotenoids content of Omani kingfish (Scomeberomorus commerson L.). British Food Journal, 112(8), 811–820. 

  3. Opara, U.L., Jacobson, D. & Al-Saady, N.A. (2010). Analysis of genetic diversity in banana cultivars (Musa cvs.) from the South of Oman using AFLP markers and classification by phylogenetic, hierarchical clustering and principal component analyses. Journal of Zhejiang University. Science. B, 11(5), 332–41. ​​​

  4. Opara, U.L. (2010). Editorial: High incidence of postharvest food losses is worsening global food and nutrition security. International Journal of Postharvest Technology & Innovation, 2(1), 1-3.

 

2009

  1. Al-Said, F.A., L.U. Opara & R. A. Al-Yahyai. (2009). Physico-chemical and textural quality attributes of pomegranate cultivars (Punica granatum L.) grown in the Sultanate of Oman. Journal of Food Engineering, 90(1), 129-134. 

  2. Al-Yahyai, R., F.A. Al-Said & L.U. Opara. (2009). Fruit growth characteristics of four pomegranate cultivars from northern Oman Fruits, 64(6), p. 1-10.

  3. Opara, L.U., M.R. Al-Ani & Y. Al-Shuaibi. (2009). Physico-chemical Properties, Vitamin C Content, and Antimicrobial Properties of Pomegranate Fruit (Punica granatum L.). Food and Bioprocess Technology: an International Journal, 2(3), 315-321.

  4. Opara, U.L. (2009). Editorial: Harnessing postharvest technology for development. International Journal of Postharvest Technology & Innovation, 1(4), 357-359.