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Social and Behavioral Sciences Commons™
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- Post-harvest Technology and Management (5)
- Food Chemistry and Quality Control (3)
- Agricultural Ethics (1)
- Chaos Theory (1)
- Coase theorem (1)
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- Dioscorea dumetorum (1)
- Dioscorea dumetorum; Cell wall constituents; Mechanical properties; Post-harvest hardening (1)
- Dioscorea dumetorum; Post-harvest changes; Rheological properties; Amylase activities; Starch paste (1)
- Dioscorea dumetorum; Raw; Cooked; Physical changes; Chemical changes; Biochemical changes; Textural changes; Post-harvest storage (1)
- Dioscorea dumetorum; Textural changes; Microstructural changes; Post-harvest hardening (1)
- Endowment effect (1)
- Environmental Economics/Public Economics (1)
- Environmental Policy in the Transportation Sector (1)
- Environmental economics (1)
- Pasting characteristics (1)
- Post-harvest changes (1)
- Public goods (1)
- Regulation of renewable resource industries (1)
- Starch paste (1)
- Valuation (1)
- Viscoelastic properties (1)
- WTA (1)
- WTA-WTP disparity (1)
- WTP (1)
- Publication
Articles 1 - 14 of 14
Full-Text Articles in Social and Behavioral Sciences
Monitoring Pv In Corn And Soybean Oils By Nir Spectroscopy, Gülgün (Yildiz) Tiryaki
Monitoring Pv In Corn And Soybean Oils By Nir Spectroscopy, Gülgün (Yildiz) Tiryaki
Dr. Gülgün YILDIZ TIRYAKI
Gülgün Yildiz a, b, Randy L. Wehling*,a, and Susan L. Cuppett a a: Department of Food Science and Technology, University of Nebraska, Lincoln, Nebraska 68583-0919, and b: Olive Culture Research Institute, Universite Cd. No. 43, Bornova/Izmir, Turkey 3500. NIR spectroscopy was used successfully in our laboratory to monitor oxidation levels in vegetable oils. Calibration models were developed to measure PV in both soy and corn oils, using partial least squares (PLS) regression and forward stepwise multiple linear regression, from NIR transmission spectra. PV can be measured successfully in both corn and soy oils using a single calibration. The most successful …
Viscoelastic Properties And Changes In Pasting Characteristics Of Trifoliate Yam (Dioscorea Dumetorum) Starch After Harvest, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Viscoelastic Properties And Changes In Pasting Characteristics Of Trifoliate Yam (Dioscorea Dumetorum) Starch After Harvest, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Professor Emmanuel Ohene Afoakwa
Studies were conducted on the viscoelastic properties, as well as the changes in pasting characteristics, of trifoliate yam, Dioscorea dumetorum, starch during post-harvest hardening of the tubers. A 3x4 factorial experiment with blanching treatment time (0, 15 and 30 s) and storage time (0, 12, 24 and 36 h) as the respective variables was performed. The samples were evaluated for pasting temperature, viscosity at 95 _C, viscosity at 95 _C-Hold, viscosity at 50 _C and viscosity at 50 _C-Hold, as well as their changes during storage of the tubers, to determine the starch behaviour of the D. dumetorum tubers during …
Textural And Microstructural Changes Associated With Post-Harvest Hardening Of Trifoliate Yam (Dioscorea Dumetorum) Pax Tubers, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Textural And Microstructural Changes Associated With Post-Harvest Hardening Of Trifoliate Yam (Dioscorea Dumetorum) Pax Tubers, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Professor Emmanuel Ohene Afoakwa
The textural and microstructural changes associated with the post-harvest hardening phenomenon of Dioscorea dumetorum tubers were studied to determine how texture relates to microstructure during the hardening process. A 2x2x4 factorial experiment with sample treatment,storage conditions and storage time as variables was performed. The tubers were harvested,matured and stored under prevailing tropical ambient conditions (28 _C) and cold room conditions (4 _C) for the study. All the samples were evaluated for their hardness (peak force) and adhesiveness (curve areas). Starch microscopy was done on the freshly harvested tubers,hardened tubers and tubers stored under low temperature conditions (4 _C) during the …
Changes In Cell Wall Constituents And Mechanical Properties During Post-Harvest Hardening Of Trifoliate Yam Dioscorea Dumetorum (Kunth) Pax Tubers, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Changes In Cell Wall Constituents And Mechanical Properties During Post-Harvest Hardening Of Trifoliate Yam Dioscorea Dumetorum (Kunth) Pax Tubers, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Professor Emmanuel Ohene Afoakwa
In an attempt to investigate the changes leading to the rapid post-harvest hardening of the white cultivars of Dioscorea dumetorum tubers, alterations in the plant cell wall constituents and mechanical properties of the tubers were monitored. A 4x2 factorial experiment with storage time (0, 24, 48 and 72 h) and storage conditions [cold room (4 _C, 85–100% RH) and tropical ambient (28 _C, 62–100% RH)] as variables were performed. Harvested tubers were stored for 24, 48 and 72 h under 4 and 28 _C. Changes in mechanical properties, acid and neutral detergent fibres, lignin, cellulose and hemicellulose contents were monitored. …
Determinants Of Demand For Food In Greece (Undergraduate Thesis, In Greek), Andreas Drichoutis
Determinants Of Demand For Food In Greece (Undergraduate Thesis, In Greek), Andreas Drichoutis
Andreas Drichoutis
No abstract provided.
Changes In Rheological Properties And Amylase Activities Of Trifoliate Yam, Dioscorea Dumetorum, Starch After Harvest, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Changes In Rheological Properties And Amylase Activities Of Trifoliate Yam, Dioscorea Dumetorum, Starch After Harvest, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Professor Emmanuel Ohene Afoakwa
Changes in rheological properties and amylase activities occurring in trifoliate yam, Dioscorea dumetorum, starch after harvest were investigated. Trifoliate yam tubers were harvested and stored under tropical ambient (28 _C) and cold room conditions (4 _C) for 12, 24 and 36 h. The D. dumetorum starches were extracted from the tubers under study and samples were evaluated for changes in their rheological properties (paste characteristics) during storage and to study the action of amylases on D. dumetorum starch after harvesting. The post-harvest activities of a and b-amylases were also studied to evaluate their rate of action on D. dumetorum starch. …
Biochemical And Textural Changes In Trifoliate Yam Dioscorea Dumetorum Tubers After Harvest, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Biochemical And Textural Changes In Trifoliate Yam Dioscorea Dumetorum Tubers After Harvest, Emmanuel Ohene Afoakwa, Samuel Sefa-Dedeh
Professor Emmanuel Ohene Afoakwa
Biochemical and textural changes were investigated in trifoliate yam Dioscorea dumetorum tubers, after harvest, in an attempt to study the chemical and physical changes associated with the raw and cooked tubers and how these relate to the hardening phenomenon of the tubers after harvest. A 2x2x3x4 factorial experiment, with cultivar, storage condition, treatment and storage time as their respective variables, was done. Samples were analysed for moisture, starch, reducing sugars, alcohol-soluble sugars, acid and neutral detergent fibre, cellulose, hemicellulose and lignin. The Warner–Bratzler test cell was used in a TA.XT2 Texture Analyser to measure the hardness of cooked tubers. The …
Determinants Of Demand For Food In Greece, Andreas Drichoutis, Panagiotis Lazaridis
Determinants Of Demand For Food In Greece, Andreas Drichoutis, Panagiotis Lazaridis
Andreas Drichoutis
No abstract provided.
Putting Food Production In Context: Toward A Postmechanistic Agricultural Ethics, David R. Keller, Charles Brummer
Putting Food Production In Context: Toward A Postmechanistic Agricultural Ethics, David R. Keller, Charles Brummer
David R. Keller
No abstract provided.
The Bias Against New Innovations In Health Care:Value Uncertainty And Willingness To Pay, Surrey M. Walton, Philip E. Graves, Peter R. Mueser, Jay K. Dow
The Bias Against New Innovations In Health Care:Value Uncertainty And Willingness To Pay, Surrey M. Walton, Philip E. Graves, Peter R. Mueser, Jay K. Dow
PHILIP E GRAVES
This paper offers a model for the bias found in willingness-to-pay valuations against new treatments. For example, this bias provides an explanation for patient preferences that make it difficult for formularies to take treatments off their lists, even when newer treatments would appear to be clearly preferable. The appeal of the model, which is based on imperfect information, is that it is consistent with rational preferences and rational behavior by patients, which are necessary for standard models and methods related to decision theory, costeffectiveness, and efficiency.
Market Power And/Or Efficiency: A Structural Approach, Azzeddine Azzam, Rigoberto Lopez, Liron-Espana Cameron
Market Power And/Or Efficiency: A Structural Approach, Azzeddine Azzam, Rigoberto Lopez, Liron-Espana Cameron
Azzeddine Azzam
This article separates oligopoly-power and cost-efficiency effects of changes in industrial concentration and assesses their impact on output prices in 32 food-processing industries. Empirical results indicate that although concentration induces cost efficiency in one-third of the industries, oligopoly-power effects either dominate cost efficiency or reinforce inefficiency, resulting in higher output prices in most industries. The article also provides fresh econometric estimates of oligopoly power and economies of size for the industries in question.
Are Commodity Prices Chaotic? Evidence From Futures Markets, Arjun Chatrath, Bahram Adrangi, Kathy K. Dhanda
Are Commodity Prices Chaotic? Evidence From Futures Markets, Arjun Chatrath, Bahram Adrangi, Kathy K. Dhanda
Kathy K Dhanda
No abstract provided.
Can Taxes On Cars And On Gasoline Mimic An Unavailable Tax On Emissions, Don Fullerton, Sarah E. West
Can Taxes On Cars And On Gasoline Mimic An Unavailable Tax On Emissions, Don Fullerton, Sarah E. West
Don Fullerton
An emissions tax is efficient, but measurement of every car’s emissions would be inaccurate and expensive. With identical consumers, we demonstrate the same efficiency for: an emissions tax; a gas tax that depends on fuel type, engine size, and pollution control equipment (PCE); a vehicle tax that depends on mileage; or a combination of uniform tax rates on gasoline and engine size with a subsidy to PCE. With heterogeneous consumers, efficiency can be obtained by a vehicle-specific gas tax or mileage-specific vehicle tax, but not by flat rates. We characterize second-best uniform tax rates on gasoline and on car characteristics.
A Principal-Agent Analysis Of Fisheries, Frank Jensen, Niels Vestergaard
A Principal-Agent Analysis Of Fisheries, Frank Jensen, Niels Vestergaard
Niels Vestergaard
Very little principal-agent analysis has been done within the fisheries economic literature. This paper conducts a principal-agent analysis of fisheries. Within a standard principal-agent model, the low-cost agent must be allowed the same level of effort as under complete information. This conclusion does not hold for fisheries, because of a resource restriction and the fact that maximisation takes place over two variables. By means of comparative-static analysis, this paper argues that the low-cost agent must be allowed a larger effort than under complete information.