Effect of nano-packing on preservation quality of fresh strawberry (Fragaria ananassa Duch. cv Fengxiang) during storage at 4 degrees C.

UNLABELLED A novel nano-packing material with lower relative humidity, oxygen transmission rate and high longitudinal strength was synthesized by blending polyethylene with nano-powder (nano-Ag, kaolin, anatase TiO(2), rutile TiO(2)), and its effect on preservation quality of strawberry fruits (Fragaria ananassa Duch. cv Fengxiang) was investigated during storage at 4 degrees C. Results showed that nano-packaging was able to maintain the sensory, physicochemical, and physiological quality of strawberry fruits at a higher level compared with the normal packing (polyethylene bags). After a 12-d storage, decreases in the contents of total soluble solids, titratable acidity, and ascorbic acid of nano-packing were significantly inhibited. Meanwhile, decay rate, anthocyanin, and malondialdehyde contents were decreased to 16.7%, 26.3 mg/100g, 66.3 micromol/g for nano-packing and 26.8%, 31.9 mg/100g, 75.4 micromol/g for normal packing; polyphenoloxidase (PPO) and pyrogallol peroxidase (POD) activities were significantly lower in nano-packing than the control. These data indicated that the nano-packaging might provide an attractive alternative to improve preservation quality of the strawberry fruits during extended storage. PRACTICAL APPLICATION Nano-packing exhibited identified quality benefits applicable to the preservation of fresh strawberry. Furthermore, nano-packing has the advantages of simple processing and feasibility to be industrialized in contrast with other storages. Thus, the utilization of nano-packing will likely assist commercial producers and retailers in extending the shelf life of products over a broader range in the future.

[1]  Volker Böhm,et al.  Processing strawberries to different products alters contents of vitamin C, total phenolics, total anthocyanins, and antioxidant capacity. , 2005, Journal of agricultural and food chemistry.

[2]  C. Forney,et al.  Antioxidant capacity, vitamin C, phenolics, and anthocyanins after fresh storage of small fruits. , 1999, Journal of agricultural and food chemistry.

[3]  Scott W. Leonard,et al.  Edible coatings to improve storability and enhance nutritional value of fresh and frozen strawberries (Fragaria × ananassa) and raspberries (Rubus ideaus) , 2004 .

[4]  Q. Fu,et al.  The interplay of thermodynamics and shear on the dispersion of polymer nanocomposite , 2004 .

[5]  Shiow Y. Wang,et al.  Changes in strawberry phenolics, anthocyanins, and antioxidant capacity in response to high oxygen treatments , 2007 .

[6]  M. Chisari,et al.  Characterization of polyphenol oxidase and peroxidase and influence on browning of cold stored strawberry fruit. , 2007, Journal of agricultural and food chemistry.

[7]  Adel A. Kader,et al.  Postharvest life and flavor quality of three strawberry cultivars kept at 5 °C in air or air+20 kPa CO2 , 2003 .

[8]  A. Kader,et al.  Carbon dioxide-induced changes in color and anthocyanin synthesis of stored strawberry fruit , 1999 .

[9]  Y. Imahori,et al.  Purification and properties of polyphenol oxidase from loquat fruit , 1998 .

[10]  W. Chiu,et al.  Synthesis of nano-sized TiO(2)/poly(AA-co-MMA) composites by heterocoagulation and blending with PET. , 2007, Journal of colloid and interface science.

[11]  T. Beta,et al.  Saskatoon and wild blueberries have higher anthocyanin contents than other Manitoba berries. , 2007, Journal of agricultural and food chemistry.

[12]  P. Nielsen,et al.  Potential of biobased materials for food packaging , 1999 .

[13]  Shang-Yu Huang,et al.  Nano-titanium dioxide composites for the enrichment of phosphopeptides. , 2006, Journal of chromatography. A.

[14]  Steven A. Sargent,et al.  Physicochemical changes during strawberry development in the field compared with those that occur in harvested fruit during storage , 2006 .

[15]  D. Joyce,et al.  1-Methylcyclopropene treatment affects strawberry fruit decay , 2001 .

[16]  N. Gontard,et al.  Recent innovations in edible and/or biodegradable packaging materials. , 1997, Food additives and contaminants.

[17]  R. Cappellini,et al.  Control of postharvest decays of blueberries by carbon dioxide-enriched atmospheres , 1983 .

[18]  S. Dipierro,et al.  The ascorbate system and lipid peroxidation in stored potato (Solanum tuberosum L.) tubers , 1997 .

[19]  Zhihong Xin,et al.  Effect of nano-packing on preservation quality of Chinese jujube (Ziziphus jujuba Mill. var. inermis (Bunge) Rehd) , 2009 .

[20]  Eva Almenar,et al.  Active package for wild strawberry fruit (Fragaria vesca L.). , 2007, Journal of agricultural and food chemistry.

[21]  Yonghua Zheng,et al.  Effect of high oxygen atmospheres on fruit decay and quality in Chinese bayberries, strawberries and blueberries , 2008 .

[22]  C. Biles,et al.  Peroxidase, polyphenoloxidase, and shikimate dehydrogenase isozymes in relation to tissue type, maturity and pathogen induction of watermelon seedlings , 1993 .

[23]  Amparo Chiralt,et al.  Quality of cold-stored strawberries as affected by chitosan–oleic acid edible coatings , 2006 .

[24]  R. Gavara,et al.  Effect of calcium dips and chitosan coatings on postharvest life of strawberries (Fragaria x ananassa) , 2006 .

[25]  P. Civello,et al.  Effect of heat treatment on strawberry fruit damage and oxidative metabolism during storage , 2006 .

[26]  F. Boostani,et al.  Effect of low temperature on the ascorbic acid content and quality characteristics of frozen strawberry , 2004 .

[27]  S. Tian,et al.  Physiological and quality responses of longan fruit to high O2 or high CO2 atmospheres in storage , 2002 .

[28]  U. Takahama,et al.  Changes in peroxidase activity and in peroxidase isozymes in carrot callus , 1993 .

[29]  A. A. Rodger,et al.  Developing the mechanical models for nanomaterials , 2007 .

[30]  Michael Jonathan QinetiQ Limited Pitkethly,et al.  Nanomaterials – the driving force , 2004 .

[31]  Hu Ai-wu,et al.  Nano Technology and Its Application in Packaging and Packaging Machinery , 2003 .

[32]  C. Forney,et al.  Improving the thiobarbituric acid-reactive-substances assay for estimating lipid peroxidation in plant tissues containing anthocyanin and other interfering compounds , 1999, Planta.