scholarly journals Brazil nuts a non-timber potential: Uncertainties and investments

2021 ◽  
Vol 10 (15) ◽  
pp. e22101521868
Author(s):  
Lyvia Julienne Sousa Rêgo ◽  
Naisy Silva Soares ◽  
Crismeire Isbaex ◽  
Simone Silva ◽  
José Cola Zanuncio ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Export Price ◽  
Price Volatility ◽  
Forest Products ◽  
Brazil Nut ◽  
Export Prices ◽  
Brazil Nuts ◽  
Risk Return ◽  
Price Series ◽  
Historical Series

The Brazil nut is one of the main non-timber forest products in Brazil, but its price fluctuations generate uncertainties and risks for both extractivists and investors. Econometric models or other simpler methods can estimate price changes and indicate the investment attractiveness of the Brazil nut. The objective of the present study was to analyze the risk-return relationship and the export price for both volatility of the Brazil nut over a 15 years period. The historical series of Brazil nut export prices, shelled and unshelled nuts, was evaluated from 2002 to 2016. The geometric growth rate and the variation coefficient indicate the return and risk respectively, associated with its price series. The price volatility of shelled and unshelled Brazil nuts was estimated with the standard deviation of the price series and with generalized models of ARCH (GARCH, EGARCH and TARCH). The shelled or unshelled Brazil nut coefficient increased over 15 years, with a low risk-return ratio. The shelled Brazil nut volatility was lower in the 2002 to 2006, 2007 to 2011 and 2012 to 2016 periods than for the unshelled nut when estimated by the standard deviation method than for the unshelled nut. The shelled Brazil nut price was higher from 2002 to 2016, with low volatility and persistent shocks. The estimate of the shelled and unshelled Brazil nut price volatility was better with the TARCH and the EGARCH models, respectively.

scholarly journals The effects of international price volatility on farmer prices and marketing margins in cattle markets

2018 ◽  
Vol 21 (3) ◽  
pp. 335-350
Author(s):  
L. Emilio Morales
Keyword(s):  
Developing Countries ◽  
Fixed Effects ◽  
Service Providers ◽  
Export Price ◽  
Price Volatility ◽  
Developed Countries ◽  
Price Transmission ◽  
Export Prices ◽  
Cattle Markets ◽  
Marketing Margins

This study examines the effects of export price volatility in cattle markets using panel data from twelve countries between 1970 and 2013. Fixed-effects models with Driscoll and Kraay standard errors were estimated to control for cross-sectional dependence. Results indicate that price transmission depends on prices previously paid to farmers, variations in export prices and volatility of export prices, which reduces farmer prices in developed countries and it increases them in developing countries. In contrast, marketing margins are reduced by contemporaneous export price volatility and are increased by previous volatility. Exporters in developing countries take more time to transmit shocks in international prices, pay lower prices to farmers and absorb a bigger proportion of price fluctuations. These price transmission imperfections affect investments, technology adoption, production level and quality across the chain in developing countries, which negatively impact farmers, input and service providers, traders and other actors of the beef cattle chain.

scholarly journals Non-timber Amazonian Forest Products and Their Valuable Edible Nuts: Cutia Nut, Egg Nut, Sapucaia Nut and Brazil Nut

2021 ◽  
Vol 9 (1) ◽  
pp. 286
Author(s):  
Beatriz de Oliveira Lopes ◽  
Caroline Correa de Souza Coelho ◽  
Aparecida das Graças Claret Souza ◽  
Otniel Freitas-Silva
Keyword(s):  
Woody Plants ◽  
Forest Products ◽  
Brazil Nut ◽  
Species Discovery ◽  
Brazil Nuts ◽  
Genetic Reserve ◽  
Non Timber Forest Products ◽  
Edible Seeds ◽  
The Subject ◽  
Scientific Name

The Amazon region contains the world’s leading genetic reserve of native plants, with most of the area located in Brazil. This region is rich in species that little known or still unknown by the population at large, including species that produce non-timber forest products (NTFPs) such as edible nuts. The objective was to verify the occurrence of these edible nuts in Brazil, to evaluate their potential and the possibility of other uses, in addition to expanding the knowledge about them. A bibliographic review of the last 50 years was carried out, mainly using the descriptors the popular name and the scientific name of the four nut trees present in the Amazon and their respective families, namely: agouti nut (Acioa edulis Prance) and egg nut (Acioa longipendula Pilg.) From the Chrysobalanaceae family, and sapucaia nut (Lecythis Pisonis Miers) and Brazil nut (Bertholletia excels Bonpl.) From the Lecythidaceae family. The Chrysobalanaceae has 450 species and 17 genera of woody plants and shrubs, producing oilseeds by some species, including egg and agouti nuts. The Lecythidaceae, on the other hand, has approximately 17 genera and 300 species, and in Brazil it is possible to find 9 genera and 122 species, 54 of them endemic, some of which produce edible seeds such as sapucaia and Brazil nuts. Those species have a great nutritional potential, and the chemical composition of their nuts reveals a good amount of lipids and proteins, but more in-depth research on the subject is necessary, including on other biases for better knowledge of the species, discovery of other potential uses and benefits and, consequently, their valorization.

scholarly journals Risk-return and difference of Ipe wood price in Pará and São Paulo markets

CERNE ◽  
2014 ◽  
Vol 20 (1) ◽  
pp. 69-72
Author(s):  
Humberto Figueira Barbosa ◽  
Lyvia Julienne Sousa Rego ◽  
Márcio Elly Piero ◽  
Rommel Noce ◽  
Juliana Mendes de Oliveira ◽  
...  
Keyword(s):  
Coefficient Of Variation ◽  
Sao Paulo ◽  
The State ◽  
Price Increase ◽  
Price Difference ◽  
Risk And Return ◽  
Risk Return ◽  
Price Series ◽  
The City ◽  
Geometric Growth

This study estimated the relation risk-return and the trend of the price difference among the markets of consumers of Ipê amarelo (Tabebuia serratifolia) sawn wood in the State of Pará and the cities of Baurú, Campinas, and Sorocaba,. It was considered as indicative of risk the Coefficient of Variation (CV), and as indicative of return the Rate of Geometric Growth (RGG) of the price series that was also used to estimate the trend of the price difference among the markets. It was noted that the risk-return relationship is coherent in all markets, and the city of Sorocaba stands out with the greatest estimative in both risk and return, and presents increase trend of the price difference among State of Pará market, which presented a temporal deficit in the price increase compared to other markets analyzed.

scholarly journals Sorption isotherms of Brazil nuts

2019 ◽  
Vol 23 (10) ◽  
pp. 776-781 ◽  
Author(s):  
Fernando M. Botelho ◽  
Nilso J. Boschiroli Neto ◽  
Silvia de C. C. Botelho ◽  
Gabriel H. H. de Oliveira ◽  
Michele R. Hauth
Keyword(s):  
Moisture Content ◽  
Equilibrium Moisture Content ◽  
Water Activity ◽  
Sorption Isotherms ◽  
Static Method ◽  
Acid Solutions ◽  
Brazil Nut ◽  
Brazil Nuts ◽  
Abstract Knowledge ◽  
Sorption Phenomenon

ABSTRACT Knowledge of the water sorption phenomenon in Brazil nut seeds will allow proper handling of this product, especially with regard to adequate conditions for safe storage. Thus, the present study aimed to determine the sorption isotherms (desorption and adsorption) of Brazil nuts, fitting different mathematical models to the experimental data, as well as to examine the hysteresis effect. To obtain the sorption isotherms, the static method was employed at temperatures of 25, 35, 45 and 55 °C and air relative humidities varying from 10 to 80%. The psychrometric conditions of the air were acquired with the aid of acid solutions and specific saturated saline left inside desiccators with the samples. It was verified that for a given isotherm, the equilibrium moisture content of Brazil nuts increases with water activity increment. In addition, at a constant water activity, equilibrium moisture content decreases with temperature increase. The Copace, Henderson and Oswin are the models that best describe the hygroscopicity of the Brazil nut seed for both the adsorption and desorption processes. Hysteresis was more pronounced at lower temperatures and higher values of water activity. The moisture content value for storage at temperatures less than 55 °C, without the risk of fungal development, must be lower than 8.2% (d.b.).

scholarly journals Selenium Accumulation, Speciation and Localization in Brazil Nuts (Bertholletia excelsa H.B.K.)

Plants ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 289 ◽  
Author(s):  
Leonardo W. Lima ◽  
Gavin C. Stonehouse ◽  
Christina Walters ◽  
Ali F. El Mehdawi ◽  
Sirine C. Fakra ◽  
...  
Keyword(s):  
Nutritional Value ◽  
Daily Intake ◽  
Brazil Nut ◽  
Organic Form ◽  
Toxicity Threshold ◽  
Brazil Nuts ◽  
Important Variation ◽  
Selenium Accumulation ◽  
Daily Allowance ◽  
Serving Size

More than a billion people worldwide may be selenium (Se) deficient, and supplementation with Se-rich Brazil nuts may be a good strategy to prevent deficiency. Since different forms of Se have different nutritional value, and Se is toxic at elevated levels, careful seed characterization is important. Variation in Se concentration and correlations of this element with other nutrients were found in two batches of commercially available nuts. Selenium tissue localization and speciation were further determined. Mean Se levels were between 28 and 49 mg kg−1, with up to 8-fold seed-to-seed variation (n = 13) within batches. Brazil nut Se was mainly in organic form. While present throughout the seed, Se was most concentrated in a ring 1 to 2 mm below the surface. While healthy, Brazil nuts should be consumed in moderation. Consumption of one seed (5 g) from a high-Se area meets its recommended daily allowance; the recommended serving size of 30 g may exceed the allowable daily intake (400 μg) or even its toxicity threshold (1200 μg). Based on these findings, the recommended serving size may be re-evaluated, consumers should be warned not to exceed the serving size and the seed may be sold as part of mixed nuts, to avoid excess Se intake.

scholarly journals Long-Term Timber Contracts in the Southeastern United States: Updating the Primer Valuation Framework

2020 ◽  
Vol 66 (6) ◽  
pp. 653-665
Author(s):  
Hector I Restrepo ◽  
Bin Mei ◽  
Bronson P Bullock
Keyword(s):  
United States ◽  
Interest Rates ◽  
Southeastern United States ◽  
Price Volatility ◽  
Forest Products ◽  
The United States ◽  
Raw Material ◽  
Conditional Volatility ◽  
Material Supply

Abstract Timberland ownership has drastically changed in the United States since the 1980s, driven by the divestitures of vertically integrated forest products companies. Having sold their timberland, forest products companies have exposed themselves more to the risk of raw material supply. To hedge against this risk, forest products companies usually use long-term timber contracts (LTTC). The objective of this article is to update the valuation framework for LTTCs proposed by Shaffer (1984) by including alternative option price models and refining the estimates of some key economic variables. In particular, conditional volatility from the generalized autoregressive conditional heteroscedasticity model and quasi-conditional volatility from rolling estimation windows, in addition to simple standard deviation, are used for the volatility estimates in the option pricing models. Contrary to the previous result by Shaffer (1984), our analysis suggests that LTTCs that were once profitable for forest products companies in the 1980s are no longer so under current market conditions. This is primarily because both timber price volatility and the risk-free interest rates have declined significantly. Thus, to be better off, forest products companies need to either lower the administration and management costs of those LTTCs or rely more on the open market for timber procurement. Study Implications: Forest products companies have traditionally relied on long-term timber contracts (LTTC) negotiated with forest landowners to mitigate the risk of raw material supply. The value of these LTTCs highly depends on the economic context. This research provides some insights into the valuation of LTTCs in the southeastern United States. Forest products companies can use this updated framework to aid their decisionmaking in timber procurement.

Multifunctional Column Coupled with Liquid Chromatography for Determination of Aflatoxins B1, B2, G1, and G2 in Corn, Almonds, Brazil Nuts, Peanuts, and Pistachio Nuts: Collaborative Study

1994 ◽  
Vol 77 (6) ◽  
pp. 1512-1521 ◽  
Author(s):  
Mary W Trucksess ◽  
Michael E Stack ◽  
Stanley Nesheim ◽  
Richard H Albert ◽  
Thomas R Romer
Keyword(s):  
Liquid Chromatography ◽  
Standard Deviation ◽  
Relative Standard Deviation ◽  
Collaborative Study ◽  
The United States ◽  
Test Portion ◽  
Brazil Nuts ◽  
Pistachio Nuts ◽  
Relative Standard

Abstract An AOAC/IUPAC collaborative study was conducted to evaluate the effectiveness of a multifunctional column for the determination of aflatoxins. The test portion is extracted with acetonitrile–water (9 + 1), the extract is filtered, and the filtrate is passed through the column. The aflatoxins in the eluate are determined by reversed-phase liquid chromatography after derivatization with trifluoroacetic acid. Naturally contaminated corn, almonds, Brazil nuts, peanuts, and pistachio nuts spiked with total aflatoxins at 5,10,20, and 30 ng/g were sent to 12 collaborators in the United States, Denmark, France, Japan, and Switzerland. Eleven collaborators completed the study. Average recoveries of total aflatoxins for each spike level for the various commodities (excluding Brazil nuts at 5 ng/g) were 93,97,95, and 95%, respectively; the repeatability relative standard deviation (RSDr) ranged from 6.0 to 23.2% and the reproducibility relative standard deviation (RSDR) ranged from 12.0 to 69.4%. The multifunctional column coupled with a liquid chromatographic method for determination of aflatoxins in corn, almonds, Brazil nuts, peanuts, and pistachio nuts has been adopted first action by AOAC INTERNATIONAL.

THE LEVEL AND PRICE VOLATILITY OF BLUEBERRY FRUITS (VACCINIUM CORYMBOSUM L.) OBTAINED BY PRODUCER AND ON THE WHOLESALE MARKET DURING 2007-2016

2017 ◽  
Vol XIX (2) ◽  
pp. 275-281 ◽  
Author(s):  
Wioletta Wróblewska ◽  
Eugenia Czernyszewicz
Keyword(s):  
Export Price ◽  
Market Price ◽  
Distribution Channel ◽  
Price Volatility ◽  
Vaccinium Corymbosum ◽  
Domestic Market ◽  
Wholesale Market ◽  
Price Changes ◽  
Market Prices

The aim of the study was to assess the level and volatility of prices of blueberry obtained in the farm (in wholesale on the domestic market and in export) and on the wholesale market during 2007-2016, due to choice of distribution channel. The level, direction and intensification of price changes were analyzed. The study shows that the prices of blueberry at the producer level were characterized by greater volatility than the wholesale market. Prices obtained by the producers on wholesale on the domestic market were significantly lower than in exports and in the wholesale market, on average in the analyzed period accounted for only 69% of the export price and 52% of the wholesale market price. Regardless of where the price comes from,the highest price for fruits was obtained in September, and the lowest in August, which is the month of the largest supply of fruits on the market.

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