The Experts below are selected from a list of 6168 Experts worldwide ranked by ideXlab platform
Xiaoshuan Zhang - One of the best experts on this subject based on the ideXlab platform.
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development and evaluation on a wireless multi gas sensors system for improving traceability and transparency of Table Grape cold chain
Computers and Electronics in Agriculture, 2017Co-Authors: Xiang Wang, Tomislav Jemric, Qile He, Maja Matetic, Xiaoshuan ZhangAbstract:A WGS2 for Table Grape cold chain was developed and evaluated.The key traceability indicators include temperature, humidity, CO2, O2, and SO2.The shelf life model was built to predict the quality indicators.Tested and analyzed in two sample Table Grapes cold chains in China.Improving the traceability and transparency of the Table Grape cold chain. There is increasing requirement to improve traceability and transparency of Table Grapes cold chain. Key traceability indicators including temperature, humidity and gas microenvironments (e.g., CO2, O2, and SO2) based on Table Grape cold chain management need to be monitored and controlled. This paper presents a Wireless Multi-Gas-Sensors System (WGS2) as an effective real-time cold chain monitoring system, which consists of three units: (1) the WMN which applies the 433MHz as the radio frequency to increase the transmission performance and forms a wireless sensor network; (2) the WAN which serves as the intermediary to connect the users and the sensor nodes to keep the sensor data without delay by the GPRS remote transmission module; (3) the signal processing unit which contains embedded software to drive the hardware to normal operation and shelf life prediction for Table Grapes. Then the study evaluates the WGS2 in a cold chain scenario and analyses the monitoring data. The results show that the WGS2 is effective in monitoring quality, and improving transparency and traceability of Table Grape cold chains. Its deploy ability and efficiency in implantation can enable the establishment of a more efficient, transparent and traceable Table Grape supply chain.
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Development and evaluation on a wireless multi-gas-sensors system for improving traceability and transparency of Table Grape cold chain
Computers and Electronics in Agriculture, 2017Co-Authors: Xiang Wang, Tomislav Jemric, Maja Matetić, Qile He, Xiaoshuan ZhangAbstract:There is increasing requirement to improve traceability and transparency of Table Grapes cold chain. Key traceability indicators including temperature, humidity and gas microenvironments (e.g., CO2, O2, and SO2) based on Table Grape cold chain management need to be monitored and controlled. This paper presents a Wireless Multi-Gas-Sensors System (WGS2) as an effective real-time cold chain monitoring system, which consists of three units: (1) the WMN which applies the 433 MHz as the radio frequency to increase the transmission performance and forms a wireless sensor network; (2) the WAN which serves as the intermediary to connect the users and the sensor nodes to keep the sensor data without delay by the GPRS remote transmission module; (3) the signal processing unit which contains embedded software to drive the hardware to normal operation and shelf life prediction for Table Grapes. Then the study evaluates the WGS2in a cold chain scenario and analyses the monitoring data. The results show that the WGS2is effective in monitoring quality, and improving transparency and traceability of Table Grape cold chains. Its deploy ability and efficiency in implantation can enable the establishment of a more efficient, transparent and traceable Table Grape supply chain.
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Evaluation on home storage performance of Table Grape based on sensory quality and consumers’ satisfaction
Journal of Food Science and Technology, 2016Co-Authors: Changyang Ma, Mira Trebar, Mark Xu, Zetian Fu, Xiaoshuan ZhangAbstract:With continuous rise of Table Grapes consumption and increased public awareness of food safety, the quality control of Grapes in storage after purchase is not sufficiently examined. Home storage constitutes the last and important stage in Grape supply chain. Literature review shows that few researches on Grape quality focus on the home storage stage compared with numerous researches reported on the quality control during postharvest and transportation process. This paper reports the performance evaluation of Grape quality at home storage and consumers’ satisfaction using integrated sensory evaluations. The internal attributes, including Texture, Taste and Odor of the Table Grapes and the appearance indices, Color and Cleanliness are examined. Key results show that during home storage, all the internal attributes decrease rapidly as time goes on, and cleanliness and color appear to be deteriorating in a lower speed. A comprehensive quality index was created to measure the quality of Table Grape which has high correlation with the Overall acceptability perceived by consumers.
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Estimating technical efficiency of Chinese Table Grape wholesalers
British Food Journal, 2015Co-Authors: Weihua Jiao, Xiaoshuan Zhang, Zetian Fu, Weisong Mu, Jianjun Lu, Mark XuAbstract:Purpose – The purpose of this paper is to estimate the technical efficiency of Chinese Table Grape wholesalers and subsequently to examine the degree to which the calculated efficiency correlates with a set of explanatory variables. Design/methodology/approach – A two-stage procedure is applied in this paper. First, a non-parametric data envelopment analysis (DEA) technique is applied to investigate the degree of technical efficiency for Chinese Table Grape wholesalers. Second, Tobit regression is used to analyze the factors influencing technical efficiency. Findings – Research results reveal that the mean technical efficiency of the sample is 0.544 and 0.860 under constant returns scale (CRS) and VRS assumptions, respectively, and the scale efficiency (SE) is 0.620. The variables of experiences, number of Grape varieties on sale, daily selling volumes and fixed sale ratio have a significant effect on technical efficiency, while the other exogenous variables do not affect the efficiency in any significant...
Nader Katerji - One of the best experts on this subject based on the ideXlab platform.
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direct and indirect methods to simulate the actual evapotranspiration of an irrigated overhead Table Grape vineyard under mediterranean conditions
Hydrological Processes, 2008Co-Authors: Gianfranco Rana, Nader KaterjiAbstract:Two methods, indirect and direct, for simulating the actual evapotranspiration (E) were applied to an irrigated overhead Table Grape vineyard during summer, situated in the Mediterranean region (south Italy), over two successive years. The first method, indirect but more practical, uses the crop coefficient (Kc) approach and requires determination of the reference evapotranspiration E0 (FAO (Food and Agriculture Organization) method). This method underestimated on average by 17% the daily values of the actual evapotranspiration E. The analysis in this paper shows that the values of Kc for the Table Grapes determined by the FAO method seem to not be valid in our experimental conditions. Similar conclusions can be found in the literature for the Table Grape cultivated under different experimental conditions and using different training systems. The second method, is a direct method for estimating the evapotranspiration. It requires development of a model for the overhead Table Grape vineyard E, following the Penman–Monteith one-step approach, and using standard meteorological variables as inputs for the determination of the canopy resistance. This method, which needs a particularly simple calibration, provided a better simulation of the hourly and daily evapotranspiration than the indirect method. In additon, the standard error of the daily values for the direct method (s0 Ð 41 mm) was about 50% lower than that obtained for the indirect method, also when the indirect method used a locally calibrated coefficient Kc instead of a generic Kc. Both, for practical application and theoretical issues, the advantages and disadvantages linked to the use of each tested method are discussed in detail.
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Direct and indirect method to simulate the actual evapotranspiration of irrigated overhead Table Grape vineyard under mediterranean conditions
Hydrological Processes, 2008Co-Authors: Gianfranco Rana, Nader KaterjiAbstract:Two methods, indirect and direct, for simulating the actual evapotranspiration (E) were applied to an irrigated overhead Table Grape vineyard during summer, situated in the Mediterranean region (south Italy), over two successive years. The first method, indirect but more practical, uses the crop coefficient (Kc) approach and requires determination of the reference evapotranspiration E0 (FAO (Food and Agriculture Organization) method). This method underestimated on average by 17% the daily values of the actual evapotranspiration E. The analysis in this paper shows that the values of Kc for the Table Grapes determined by the FAO method seem to not be valid in our experimental conditions. Similar conclusions can be found in the literature for the Table Grape cultivated under different experimental conditions and using different training systems. The second method, is a direct method for estimating the evapotranspiration. It requires development of a model for the overhead Table Grape vineyard E, following the Penman–Monteith one-step approach, and using standard meteorological variables as inputs for the determination of the canopy resistance. This method, which needs a particularly simple calibration, provided a better simulation of the hourly and daily evapotranspiration than the indirect method. In additon, the standard error of the daily values for the direct method (š0 Ð 41 mm) was about 50% lower than that obtained for the indirect method, also when the indirect method used a locally calibrated coefficient Kc instead of a generic Kc. Both, for practical application and theoretical issues, the advantages and disadvantages linked to the use of each tested method are discussed in detail.
Manuela M. Chaves - One of the best experts on this subject based on the ideXlab platform.
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deficit irrigation in Table Grape eco physiological basis and potential use to save water and improve quality
Theoretical and Experimental Plant Physiology, 2016Co-Authors: M. Permanhani, M. A.f. Conceição, R. T. De Souza, M. A.s. Vasconcellos, Manuela M. Chaves, Miguel J CostaAbstract:Table Grapes are one of the most productive and economically relevant fruit crops worldwide. Table Grape production characterizes by high water productivity but also by an intensive use of water, which puts pressure on local/regional water resources, particularly in dry regions (e.g. South Mediterranean, Northeast and Southeast of Brazil). Climate change and scarcer water resources make the problem more severe in those areas. Meanwhile, consumer’s demand for quality and sustainable production is increasing and environmental issues are becoming critical for competiveness. In this context, Table Grape “industry” needs solutions to promote water savings, sustain yield, quality and profit. Deficit irrigation emerged as a tool to mitigate the negative impact of drought on yield and quality and to save water in modern irrigated viticulture. Our aim is to describe the potential benefits of deficit irrigation in Table Grape production namely in what concerns water savings and berry quality. Previous literature shows that the effect of deficit irrigation on water savings varies with the genotype (scion and rootstock), the environmental conditions as well as the adopted agronomic strategies. This paper provides a comprehensive and up-to-date overview on the eco-physiological basis of deficit irrigation strategies and their role on growth, yield and berry quality (biophysical and biochemical) in Table Grape. Complementary crop management strategies to guarantee a more sustainable use of water (e.g. higher water use efficiency), improved berry quality and smaller environmental impact of Table Grape production are presented and discussed.
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Deficit irrigation in Table Grape: eco-physiological basis and potential use to save water and improve quality
Theoretical and Experimental Plant Physiology, 2016Co-Authors: M. Permanhani, J. Miguel Costa, M. A.f. Conceição, R. T. De Souza, M. A.s. Vasconcellos, Manuela M. ChavesAbstract:Table Grapes are one of the most produc-tive and economically relevant fruit crops worldwide. Table Grape production characterizes by high water productivity but also by an intensive use of water, which puts pressure on local/regional water resources, particularly in dry regions (e.g. South Mediterranean, Northeast and Southeast of Brazil). Climate change and scarcer water resources make the problem more severe in those areas. Meanwhile, consumer's demand for quality and sustainable production is increasing and environmental issues are becoming critical for competiveness. In this context, Table Grape ''industry'' needs solutions to promote water savings, sustain yield, quality and profit. Deficit irrigation emerged as a tool to mitigate the negative impact of drought on yield and quality and to save water in modern irrigated viticulture. Our aim is to describe the potential benefits of deficit irrigation in Table Grape production namely in what concerns water savings and berry quality. Previous literature shows that the effect of deficit irrigation on water savings varies with the genotype (scion and rootstock), the environmental conditions as well as the adopted agronomic strategies. This paper provides a comprehensive and up-to-date overview on the eco-physiological basis of deficit irrigation strate-gies and their role on growth, yield and berry quality (biophysical and biochemical) in Table Grape. Com-plementary crop management strategies to guarantee a more sustainable use of water (e.g. higher water use efficiency), improved berry quality and smaller envi-ronmental impact of Table Grape production are presented and discussed. M. Permanhani and J. Miguel Costa contributed equally to this study.
R. Campos-vargas - One of the best experts on this subject based on the ideXlab platform.
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Effect of modified atmosphere packaging (MAP) on rachis quality of 'Red Globe' Table Grape variety
Postharvest Biology and Technology, 2016Co-Authors: Christian Silva-sanzana, Ivan Balic, Francisca Blanco-herrera, Pilar Sepulveda, Pablo Olmedo, Bruno G Defilippi, Gabriel Leon, R. Campos-vargasAbstract:Rachis browning corresponds to a postharvest disorder that drastically reduces overall Table Grape quality. This problem has been associated mainly to water loss, but the possibility of having other factors involved like green pigment degradation and brownish compound synthesis that mask the green tissue is also feasible. Modified Atmosphere Packaging (MAP) is a technology used to extend Table Grape postharvest life, including rachis appearance. The objective of this study was to analyze the effects caused by MAP on rachis browning during cold storage of 'Red Globe' Table Grape variety. MAP helped to reduce the green color loss on rachises stored for 90 days of storage at 0 °C compared with a conventional storage (CS) even after a shelf life period, without to affect negatively the quality of the berries. Interestingly, MAP storage decreased the content of chlorophyll-a and increased the amount of pheophytin-a, a chlorophyll degradation product, compared to CS both after cold storage period and shelf life. Additionally, the expression of genes involved in the chlorophyll breakdown pathway was analyzed by qPCR. We found that MAP induced an increase in the transcript abundance of metal-chelating substance (MCS) and Red Chlorophyll Catabolite Reductase (RCCR) genes. However, Pheophytinase (PPH) and Pheophorbide-a Oxigenase (PaO) transcript accumulation revealed no changes compared with CS. Apparently, MAP generated a modification in the chlorophyll breakdown process allowing an accumulation of green like compounds responsible for the greener color of rachises in the MAP stored bunches. On the other hand, histological analysis reveals that after cold storage and shelf life, morphological changes and brown compounds accumulation take place at the periderm and cortex tissues, and these symptoms are less severe in MAP stored bunches helping to keep longer the green coloration of the rachises. In this study we observed that MAP storage increases rachis postharvest quality by reducing green color loss probably due to a combination of processes involving a delay of green pigments degradation and a less accumulation of brown compounds at the periderm and cortex tissues, thus preventing green pigments masking.
J Cuevas - One of the best experts on this subject based on the ideXlab platform.
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post veraison regulated deficit irrigation in crimson seedless Table Grape saves water and improves berry skin color
Agricultural Water Management, 2016Co-Authors: V Pinillos, Fernando Marcelo Chiamolera, Juan F Ortiz, J J Hueso, J CuevasAbstract:Poor skin color in red Table Grape cultivars is one of the most troublesome difficulty producers face in the management of this crop. Recent EU limitations of ethylene release products left growers with poor prospects to improve the color of the berry. In this work, we have explored ‘Crimson Seedless’ response to deficit irrigation from veraison to the end of harvest and we observed an improvement in the development of the berry skin color. Earlier yield was also obtained in plants under deficit irrigation, with a higher percentage of yield in the first picking operations, due to earlier acquisition of color by the berries. Negative effects on berry size or on total yield were not observed. Therefore, we may recommend deficit irrigation from veraison to harvest as a mean to increase the quality of the berry and to reduce water consumption.
