for Journals by Title or ISSN
for Articles by Keywords

Publisher: Macrothink Institute   (Total: 40 journals)   [Sort by number of followers]

Showing 1 - 40 of 40 Journals sorted alphabetically
Aquatic Science and Technology     Open Access   (Followers: 3)
Asian J. of Finance & Accounting     Open Access   (Followers: 13)
Business and Economic Research     Open Access   (Followers: 6)
Business and Management Horizons     Open Access   (Followers: 12)
Business Management and Strategy     Open Access   (Followers: 43)
Case Studies in Business and Management     Open Access   (Followers: 10)
Education and Linguistics Research     Open Access   (Followers: 4)
Environmental Management and Sustainable Development     Open Access   (Followers: 6)
Intl. Finance and Banking     Open Access   (Followers: 2)
Intl. J. of Accounting and Financial Reporting     Open Access   (Followers: 14)
Intl. J. of Culture and History     Open Access   (Followers: 8)
Intl. J. of Education     Open Access   (Followers: 18)
Intl. J. of English Language Education     Open Access   (Followers: 15)
Intl. J. of Human Resource Studies     Open Access   (Followers: 13)
Intl. J. of Industrial Marketing     Open Access   (Followers: 5)
Intl. J. of Learning and Development     Open Access   (Followers: 6)
Intl. J. of Linguistics     Open Access   (Followers: 12)
Intl. J. of Regional Development     Open Access   (Followers: 1)
Intl. J. of Social Science Research     Open Access   (Followers: 12)
Intl. J. of Social Work     Open Access   (Followers: 17)
Intl. Research in Education     Open Access   (Followers: 6)
Issues in Economics and Business     Open Access  
Issues in Social Science     Open Access   (Followers: 3)
J. for the Study of English Linguistics     Open Access   (Followers: 6)
J. of Agricultural Studies     Open Access   (Followers: 2)
J. of Applied Biotechnology     Open Access   (Followers: 2)
J. of Asian Development     Open Access   (Followers: 1)
J. of Biology and Life Science     Open Access   (Followers: 1)
J. of Education and Training     Open Access   (Followers: 2)
J. of Educational Issues     Open Access  
J. of Entrepreneurship and Business Innovation     Open Access   (Followers: 6)
J. of Environment and Ecology     Open Access   (Followers: 10)
J. of Food Studies     Open Access   (Followers: 5)
J. of Management Research     Open Access   (Followers: 9)
J. of Public Administration and Governance     Open Access   (Followers: 24)
J. of Social Science Studies     Open Access   (Followers: 9)
J. of Studies in Education     Open Access   (Followers: 4)
Research in Applied Economics     Open Access   (Followers: 3)
Research in Business and Management     Open Access   (Followers: 1)
World J. of Business and Management     Open Access   (Followers: 1)
Journal Cover Journal of Agricultural Studies
  [2 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2166-0379
   Published by Macrothink Institute Homepage  [40 journals]
  • Optimization of a Microwave Assisted Extraction of Organic Sulphur from
           Domestic Sewage Sludge by UV-Vis Spectrophotometry Determination

    • Authors: Darlan Ferreira Silva, Maria Olimpia Oliveira Rezende
      Pages: 1 - 13
      Abstract: An alternative method for microwave-assisted extraction of organic sulphur in sewage sludge samples was optimized based on response surface methodology. The extraction process was defined by a 23 factorial design. In the factorial design, the temperature, the extraction time and the volume of hydrochloric acid in the solvent mixture were evaluated. The samples were extracted with a mixture of nitric acid and hydrochloric acid. The data obtained for study were based on the concentration of sulphur in the sulfate form (S-SO42-) obtained spectrophotometrically in the sludge samples. The initial extraction parameters were adjusted so that spectrophotometric determination was feasible. According to the levels (minimum and maximum) defined for each parameter, the methodology showed that the best extraction conditions were achieved with an extraction temperature of 150 °C, using a longer extraction time (40 min). This study was carried out to evaluate the efficiency of microwave-assisted extraction in spectrophotometric determination of sulphur in sludge samples.
      PubDate: 2017-10-09
      DOI: 10.5296/jas.v5i4.11888
      Issue No: Vol. 5, No. 4 (2017)
  • Supply Response of Milk Producers to Economic and Non-Economic Factors in

    • Authors: Micah Bheki Masuku, Mlungisi C. Sukati, Jeremiah I Rugambisa
      Pages: 14 - 34
      Abstract: Supply response indicates the output change due to the change in price and non-price factors. The main aim of this study was to analyse the supply response of milk producers to various economic and non-economic factors. The specific objectives were to determine the responsiveness of milk supply in Swaziland to price and its substitute price (milk powder) and to examine the responsiveness of milk producers to non-economic factors such as rainfall, technology and dairy cattle inventory. The study used time series data from 2010 to 2014 and each year was given in months in-order to have 60 data points. Several techniques relevant for analysing time series data were employed, which included testing for stationarity of the data, checking if the independent variables if are able to explain the dependent variable (cointegration), running the long-run regression, then dropping some of the residuals which were not significant, after which the Vector Error-Correction Model and the diagnostic tests were conducted. Such analysis included the formal test for stationarity. The Johansen cointegration test was used which provided evidence of cointegration between Milk Output and its determinants. The long-run regression results revealed that Milk Powder Output and Milk Powder Price are significant in determining milk response in the long-run in Swaziland with the elasticities of -0.48 and -0.92 respectively, while the short-run coefficients were-0.21 and -0.70 respectively. Both variable were significant at 1% in the short-run and only the Milk Output was significant at 5% (P>0.05) in the short-run. The Vector Error Correction Model (VECM) came out with the correct -0.129 implying that only 12.9% of the shocks will be adjusted back to the long-run path within a month. The study therefore, recommended that the Swaziland Government should promote local market share and purpose policies to decrease the country’s reliance to imported dairy products, which negatively affects economic development.
      PubDate: 2017-10-22
      DOI: 10.5296/jas.v5i4.11764
      Issue No: Vol. 5, No. 4 (2017)
  • Analysis of Substitute Products in the Demand for Food Products in
           Côte D’Ivoire

    • Authors: Tite Beke
      Pages: 35 - 64
      Abstract: This study analyzes the demand for staple foods in Côte d’Ivoire and assesses the impact of fluctuations in food prices on household well-being. It focuses on the price- and income elasticities of food demand, as they are useful parameters for measuring households’ reaction to the changes in prices and incomes, and for improving food policies. The study also assesses the loss in well-being arising from food crises with a view to recommending more effective measures for supporting households. It uses an approach that estimates a Quadratic Almost Ideal Demand System (QUAIDS) in order to highlight price and expenditure elasticities. The data used in the study were obtained from the National Household Living Standards Survey (ENV) conducted by the National Institute of Statistics (INS) in 2008. The estimated expenditure- and price elasticities show that the four food clusters under analysis (cereals, root crops and tubers, fruit and vegetables, and animal products) were staple foods that were price inelastic for all the households. A substitutability relationship is observed between cereals, and root crops and tubers. However, animal products and vegetables are found to be complementary to each other and complementary to cereals and root crops and tubers.
      PubDate: 2017-10-30
      DOI: 10.5296/jas.v5i4.11402
      Issue No: Vol. 5, No. 4 (2017)
  • Chemical Disinfestation for Sowing and in Vitro Re-cultivation of Orchids
           and its Influence on the Seedlings Nutrition

    • Authors: Andréia Aline Fontes, Victor Hugo Alvarez V., Sarah Vieira Novais, Wagner Campos Otoni, André Ferreira Santos, Roberto Ferreira Novais
      Pages: 65 - 82
      Abstract: The use of a commercial bleach solution (CB) for in vitro propagation of orchids has proven to be an efficient technique and an alternative to the use of the autoclave and laminar flow chamber (LFC). The aim of this study was to evaluate the use of CB in disinfestation of culture media (CM) for seeding and for re-cultivation of orchid plantlets and its effect in different types of flasks and on the nutritional state of the plantlets. In the seeding experiment, seeds of Laelia tenebrosa Rolfe were used, with evaluation of three types of flasks; five concentrations of CB applied to the CM of 2, 5, 10, 20 and 40 mL L-1 and the control treatment. In the re-cultivationexperiment, Cattleya kerri Brieger & Bicalho plantlets were used. The rates of CB added to the CM were 2, 5, 10, 20, 30, 35 and 38 mL L-1 in polypropylene containers, and the rates sprayed on the plantlets at re-cultivation were 5, 12.5, 25, 50, 75, 87.5 and 95 mL L-1. The proportion of germinated seeds and the dry matter weight of the protocorms were greater in the control treatment. The increasing rates of CB added to the CM had worse results for germination in glass flasks. In re-cultivation, there was no significant difference in the growth of the plantlets between the autoclaved flasks and those disinfested in CB.Keymessage: Both orchid seeding and re-cultivation of seedlings can be carried out entirely and efficiently without the use of an autoclave and laminar flow chamber, using chemical disinfection with commercial bleach.
      PubDate: 2017-11-03
      DOI: 10.5296/jas.v5i4.12099
      Issue No: Vol. 5, No. 4 (2017)
  • Developing A Simple Water Use Model of Ilex x ‘Nellie R. Stevens’ from
           Liners to Four Meter Tall Trees

    • Authors: Richard C. Beeson; Jr., Hang Thi Thu Duong, Roger J. Kjelgren
      Pages: 83 - 96
      Abstract: To meet minimum spring flows, water management districts in Florida sought to make both agriculture and urban landscapes water efficient, which includes tree farms. Ilex spp. (holly) trees are endemic to Central Florida and among the most popular landscape trees for their hardness, bright colors and go-anywhere size. To provide a basis for irrigation allocations both during production and in landscapes, daily actual evapotranspiration (ETA) for three holly trees were measured with weighing lysimeters over 5.75 years, beginning with rooted cuttings and continuing until trees averaged 4.3 meters in height. Empirical models were derived to calculate ETA based on crown horizontal projected area or trunk caliper, adjusted daily by changes in evapotranspiration (ETo). Average ETA to produce these hollies was 20 432 L cumulative over 5.75 years.
      PubDate: 2017-11-02
      DOI: 10.5296/jas.v5i4.11820
      Issue No: Vol. 5, No. 4 (2017)
  • Cropping System Effects on Soil Monosaccharides in Western Burkina Faso

    • Authors: Badiori Ouattara, Idriss Sermé, Korodjouma Ouattara, Michel P Sédogo, Hassan Bismark Nacro
      Pages: 97 - 109
      Abstract: Labile pools of soil organic matter (SOM), including soil sugars, are important to the formation and stabilization of soil aggregates and to microbial activity and nutrient cycling. The effects of cropping systems at farm level in tropical areas on SOM labile pool dynamics have not been adequately studied and the results are sparse and inconsistent. The objective of this study was to determine the effects of soil management intensity on soil sugar monomers derived from plant debris or microbial activity in cotton (Gossypium herbaceum)-based cropping systems of western Burkina Faso. Thirty-three (33) plots were sampled at 0-15 cm soil depth considering field-fallow successions and tillage intensity. Two pentose (arabinose, xylose) and four hexose (glucose, galactose, mannose, glucosamine) monomers accounted for 2 to 18% of soil organic carbon (SOC) content. Total sugar content was significantly less with tillage, especially for the hexose monomeric sugars glucose and mannose, the latter of microbial origin. Soil mannose was 63 and 80% less after 10 years of cultivation, without and with annual ploughing respectively, compared with fallow conditions. Soil monosaccharide content was rapidly restored with fallow and soon approached the equilibrium level observed under old fallow lands. Therefore, the soil monosaccharides, in particular galactose and mannose from microbial synthesis are early indicators of changes in SOC.
      PubDate: 2017-11-06
      DOI: 10.5296/jas.v5i4.11985
      Issue No: Vol. 5, No. 4 (2017)
  • Possibilities of Energy Generation from Olive Tree Residues, by-products
           and Waste in Crete, Greece

    • Authors: John Vourdoubas
      Pages: 110 - 122
      Abstract: The objective of the current work is the investigation of the current utilization of olive tree residues, by-products and waste for energy generation in Crete and their future prospects. The quantity of olive tree biomass in Crete has been estimated and its potential for energy generation has been calculated. Possibilities for using it for heat production, power generation, biogas production, pellet manufacturing and fermentable sugar production have been investigated. Experiences in other olive oil producing countries have been recorded together with the technologies used or experimented with so far. The energy potential of olive tree biomass in Crete has been estimated at 24.05 % of the TPES supply in the island. The only highly utilized olive tree by-product for heat generation by combustion in Crete is the olive kernel wood. Olive tree pruning have the highest energy content but they are underutilized in Crete. Their successful utilization in other countries for pellet manufacturing and power generation indicates that their exploitation should be promoted in Crete. The results of this study indicate that olive tree cultivation in Crete, apart from producing a high nutritional edible product, generates residues, by-products and waste which if properly utilized could contribute in the reduction of fossil fuels used and the carbon footprint due to energy use in the island.
      PubDate: 2017-11-08
      DOI: 10.5296/jas.v5i4.12114
      Issue No: Vol. 5, No. 4 (2017)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
Home (Search)
Subjects A-Z
Publishers A-Z
Your IP address:
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-