scholarly journals Sesame post-harvest loss from small-scale producers in Kafta Humera District, Ethiopia

2019 ◽  
Vol 11 (2) ◽  
pp. 33-42 ◽  
Author(s):  
Gebretsadik Desale ◽  
Haji Jema ◽  
Tegegne Bosena
Keyword(s):  
Small Scale ◽  
Post Harvest ◽  
Post Harvest Loss

scholarly journals Assessment of post harvest loss of wet fish: a novel approach based on sensory indicator assessment

2015 ◽  
Vol 13 (1) ◽  
pp. 75-89 ◽  
Author(s):  
A AKM Nowsad ◽  
MM Hossain ◽  
MN Hassan ◽  
SM Sayem ◽  
JF Polanco
Keyword(s):  
Fish Species ◽  
Goodness Of Fit ◽  
Sensory Quality ◽  
Distribution Channel ◽  
Small Scale ◽  
Interval Estimate ◽  
Quality Loss ◽  
Commercial Fish ◽  
Post Harvest ◽  
Post Harvest Loss

As a very common feature of fish marketing, small-scale fisheries in tropical countries suffers from huge post-harvest loss every year. A method was proposed to quantify the post-harvest quality loss of wet fish using sensory based assessment tool. The assessments were conducted on four fish species (rohu Labeo rohita; Ilish Tenualosa ilisha, catfish Pangasius sutchi and tilapia Oreochromis niloticus) in different steps of major distribution channels in Bangladesh for a year. Sensory quality defect point data were standardized with corresponding biochemical and microbiological quality parameters through interval estimate based on regression analysis, where a “near to actual” sensory quality breaking point was found to be DP 3.3. High value of goodness of fit 2 R indicated a highly fitted regression model for all the fishes tested, with highly significant (p<0.01) estimated regression coefficients. Percent quality loss of fish at each step of distribution channel was determined using DP 3.3, constructing a (1-?) confidence interval for average percentage of defective fish. The loss assessment study indicated that fish did not lose quality during handling by the fishermen, and fish farmers or at landing centers and primary fish markets, except fresh T. ilisha destined for consumer market. While, T. ilisha used for salting during glut catch suffered substantial loss. Most of the quality losses were initiated at the transporters and commission agents, from 4% in P. sutchi to 11% in O. niloticus. When fish come to retailers, a 16% loss was recognized in L. rohita and O. niloticus, but 7% in P. sutchi and 9% in T. ilisha. Higher loss was observed in fish vendors, from 10% - 19%. Considering the retailers as the end-point stake in the fish distribution chain, study revealed the range of fish quality loss was 7-16% in four major consumed species in Bangladesh. The method was further validated in assessing the quality of 24 other major commercial fish species in different seasons and locations country-wide for two consecutive years and found identical results. The results suggest that the new method can be applied to any fish in quantifying the qualitative loss.SAARC J. Agri., 13(1): 75-89 (2015)

scholarly journals Ethylene induces soil microbes to delay fruit ripening

2014 ◽  
Author(s):  
Guenevere Perry ◽  
Diane Williams
Keyword(s):  
Fruit Ripening ◽  
Fruits And Vegetables ◽  
Soil Microbes ◽  
Low Cost ◽  
Ripening Process ◽  
Post Harvest ◽  
Climacteric Fruit ◽  
Low Concentrations ◽  
Transportation Container ◽  
Post Harvest Loss

The consumer demand for fresh fruits and vegetables increases every year, and farmers need a low cost novel method to reduce post-harvest loss and preserve the quality of fresh fruits and vegetables. This study identifies a method to induce soil bacteria to biosynthesize a nitrile compound that potentially enters the plants tissue and negatively affects climacteric ripening and delays the ripening process at 20-30˚C. This study used soil rich with soil microbes, to delay the ripening of climacteric fruit. The soil was treated with nitrogen, a heavy metal, and ethylene gas. Ethylene induced the soil to delay the ripening of organic bananas and peaches. A prototype transportation container maintained fruit fresh for up to 72 h at 20-30˚C. The fruit retained color, firmness, texture, no bruising and minimal spotting. The soil also prevented fungal infection in all samples. GC-MS analysis suggests ethylene induced the soil microbes to release an acetonitrile compound into the gaseous environment. The nitrile is released in low concentrations, but mature plants (fruits) contain very low levels of indole-3-acetonitrile (IAN) or indole-3-acetic acid (IAA). The nitrile may obstruct or modify the mature plants (fruit) late stages development process, thus delay the climacteric ripening process and retarding the physiological and phenotypic effects of fruit ripening. We believe this study may have strong applications for post-harvest biotechnology.

Control of Perishable Goods in Cold Logistic Chains by Bionanosensors

2016 ◽  
pp. 376-402 ◽  
Author(s):  
David Bogataj ◽  
Damjana Drobne
Keyword(s):  
Supply Chain ◽  
Feedback Control ◽  
Supply Chains ◽  
Industrial Engineering ◽  
Fruit And Vegetable ◽  
Loss Prevention ◽  
Post Harvest ◽  
Perishable Goods ◽  
Temperature And Humidity ◽  
Post Harvest Loss

Nanotechnology can contribute to food security in supply chains of agri production-consumption systems. The unique properties of nanoparticles have stimulated the increasing interest in their application as biosensing. Biosensing devices are designed for the biological recognition of events and signal transduction. Many types of nanoparticles can be used as biosensors, but gold nanoparticles have sparked most interest. In the work presented here, we will address the problem of fruit and vegetable decay and rotting during transportation and storage, which could be easily generalized also onto post-harvest loss prevention in general. During the process of rotting, different compounds, including different gasses, are released into the environment. The application of sensitive bionanosensors in the storage/transport containers can detect any changes due to fruit and vegetable decay and transduce the signal. The goal of this is to reduce the logistics cost for this items. Therefore, our approach requires a multidisciplinary and an interdisciplinary approach in science and technology. The cold supply chain is namely a science, a technology and a process which combines applied bio-nanotechnology, innovations in the industrial engineering of cooling processes including sensors for temperature and humidity measurements, transportation, and applied mathematics. It is a science, since it requires the understanding of chemical and biological processes linked to perishability and the systems theory which enables the developing of a theoretical framework for the control of systems with perturbed time-lags. Secondly, it is a technology developed in engineering which relies on the physical means to assure appropriate temperature conditions along the CSC and, thirdly, it is also a process, since a series of tasks must be performed to prepare, store, and transport the cargo as well as monitor the temperature and humidity of sensitive cargo and give proper feedback control, as it will be outlined in this chapter. Therefore, we shall discuss how to break the silos of separated knowledge to build an interdisciplinary and multidisciplinary science of post-harvest loss prevention. Considering the sensors as floating activity cells, modelled as floating nodes, in a graph of such a system, an extended Material Requirement Planning (MRP) theory will be described which will make it possible to determine the optimal feedback control in post-harvest loss prevention, based on bionanosensors. Therefore, we present also a model how to use nanotechnology from the packaging facility to the final retail. Any changes in time, distance, humidity or temperature in the chain could cause the Net Present Value (NPV) of the activities and their added value in the supply chain to be perturbed, as presented in the subchapter. In this chapter we give the answers to the questions, how to measure the effects of some perturbations in a supply chain on the stability of perishable agricultural goods in such systems and how nanotechnology can contribute with the appropriate packaging and control which preserves the required level of quality and quantity of the product at the final delivery. The presented model will not include multicriteria optimization but will stay at the NPV approach. But the annuity stream achieved by improved sensing and feedback control could be easily combined with environmental and medical/health criteria. An interdisciplinary perspective of industrial engineering and management demonstrates how the development of creative ideas born in separate research fields can be liaised into an innovative design of smart control devices and their installation in trucks and warehouses. These innovative technologies could contribute to an increase in the NPV of activities in the supply chains of perishable goods in general.

scholarly journals Reduction of Postharvest Loss and Prolong the Shelf-Life of Banana through Hot Water Treatment

2013 ◽  
Vol 27 ◽  
pp. 42-47 ◽  
Author(s):  
Md Nurul Amin ◽  
Md Mosharraf Hossain
Keyword(s):  
Water Treatment ◽  
Shelf Life ◽  
Chemical Engineering ◽  
Hot Water ◽  
Crown Rot ◽  
Hot Water Treatment ◽  
Post Harvest ◽  
Soluble Solid ◽  
Post Harvest Loss ◽  
Postharvest Loss

For reducing the post-harvest loss and extension of shelf-life of banana, it is treated with fungicide or combination of fungicide and hot-water treatment. A study was conducted for developing a method to control post-harvest diseases and extension of shelf-life of banana through non-chemical method of hot water treatment. The best treatment combination was found at 53 °C for 9 minutes. Shelf-lives of BARI Kola 1 and Sabri Kola treated with hot water increased by 26 and 27.5%, respectively against untreated fruits. Post-harvest loss (decay and crown rot) of these varieties was reduced, respectively by 95% and 70% against untreated fruits. Firmness of treated fruits for both varieties was found higher than that of untreated fruits during ripening. Total soluble solid, total sugar, acidity and ?-carotene of treated fruits of these varieties increased over untreated fruits. The pH and vitamin C of treated bananas decreased over untreated fruits during ripening. DOI: http://dx.doi.org/10.3329/jce.v27i1.15857 Journal of Chemical Engineering, IEB Vol. ChE. 27, No. 1, June 2012: 42-47

scholarly journals Using Post-Harvest Waste to Improve Shearing Behaviour of Loess and Its Validation by Multiscale Direct Shear Tests

2019 ◽  
Vol 9 (23) ◽  
pp. 5206 ◽  
Author(s):  
Wen-Chieh Cheng ◽  
Zhong-Fei Xue ◽  
Lin Wang ◽  
Jian Xu
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Strain Hardening ◽  
Gradual Increase ◽  
Small Scale ◽  
Optimal Dosage ◽  
Direct Shear ◽  
Shear Tests ◽  
Post Harvest ◽  
Direct Shear Tests

Loess and PHW (post-harvest waste) are easily accessible in the Chinese Loess Plateau and have been widely applied to construction of residential houses that have been inhabited for decades under the effect of freeze-thaw cycles. Although many researchers have recognised that the addition of fibers to loess soil is effective in preventing soil erosion and stabilising slopes, a consensus on this claim has not been reached yet. This study investigates the shearing behaviour of the loess-PHW mixture using small-scale and large-scale direct shear (SSDS and LSDS) tests. Four typical shear stress versus horizontal displacement curves from the multiscale direct shear tests are recognised where one is featured with strain-softening shape and the other three with a strain-hardening shape. Two out of the three curves with strain-hardening shape show a gradual increase in the shear stress at additional and larger displacements, respectively, in which some factor starts to have an influence on the shearing behaviour. Comparisons of the shear strength measured in SSDS and LSDS are made, indicating that there are differences between SSDS and LSDS. The effect of PHW addition on shear strength is assessed in order to determine the optimal dosage. The improvement of shear strength is attributed to the effect of particle inter-locking, resulting from the addition of PHW to loess specimens, and takes effect as the water content surpassed a threshold, i.e., >14%, that facilitates particle rearrangement. Particle-box interaction behaviour is assessed at the same time, and the findings satisfactorily address the main cause of the gradual increase in shear stress following the curve inflection point. The improved shearing behaviour proves the ability of the loess-PHW mixture to resist the seepage force and consequently stratum erosion.

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