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Article
Publication date: 1 January 2007

O.O. Adejumo and J.O. Ojo

The results of trial experiments carried out with a computer simulation model of total reflection X‐ray fluorescence, TXRF system to determine optimum conditions for…

Abstract

The results of trial experiments carried out with a computer simulation model of total reflection X‐ray fluorescence, TXRF system to determine optimum conditions for detecting certain elements of interest under various analytical conditions in a given ten‐element standard sample is presented in this paper. Results of these trial experiments show that the detectability of elements improved with increasing applied voltages up to about 43kV (for a Molybdenum anode TXRF spectrometer) and atomic number of elements. Variation of geometry such as the glancing incidence angle of the excitation beam reflected slight increase in minimum detection limit, MDL values as the angle of incidence is reduced from an optimum value of 1.6mradian to 1.0mradian. The nature of the sample support was observed to affect the detectability of the elements as good detection limits were obtained if gold is used as sample holder..

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Multidiscipline Modeling in Materials and Structures, vol. 3 no. 1
Type: Research Article
ISSN: 1573-6105

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Article
Publication date: 20 June 2020

Olayinka A. Adeagbo and Oluwabunmi O. Adejumo

The study was conducted to investigate the economics of dry season vegetable production in Ogun state, Nigeria.

Abstract

Purpose

The study was conducted to investigate the economics of dry season vegetable production in Ogun state, Nigeria.

Design/methodology/approach

Descriptive statistics, budgetary technique and regression analysis model were used to analyze the data collected from 120 respondents using multistage sampling technique.

Findings

Descriptive statistics showed that while the mean age of the farmers was 62.1 ± 38.78, the mean farming experience was 17.3 ± 12.84. Majority (56.7%) of the respondents were uneducated. Vegetable enterprise in the area was male-dominant. The result of budgetary analysis revealed that the average net and total income were ₦ 55,405.29 and ₦ 131,514, respectively. While the average total variable cost was ₦ 64,767.29, average total cost was ₦ 76,108.70. Benefit cost ratio and rate of returns were 1.73 and 0.73, respectively. The regression analysis revealed that revenue from vegetable production in the study area was influenced by farm size, seed quantity, farming experience, quantity of labor and fertilizer used.

Research limitations/implications

It is therefore imperative for policymakers to encourage dry season vegetable farming as a viable enterprise option for the unemployed and upcoming entrepreneurs. Meanwhile, the government should design and implement policies that would improve access to land, labor, quality seed, water and fertilizers.

Originality/value

The study adds to the growing body of literature on inherent prospects for labor and entrepreneurs as regards the opportunities latent in dry season farming activities.

Details

African Journal of Economic and Management Studies, vol. 11 no. 3
Type: Research Article
ISSN: 2040-0705

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Article
Publication date: 12 July 2013

Isaac Bamgboye and Oyebola I. Adejumo

The study aimed to focus on the effect of the processing parameters on the physicochemical properties of oil from roselle seed.

Abstract

Purpose

The study aimed to focus on the effect of the processing parameters on the physicochemical properties of oil from roselle seed.

Design/methodology/approach

Fine and coarse samples of the ground roselle seeds were conditioned to the moisture contents of 4.4‐10.4 per cent and 5.14‐11.14 per cent. Oil was expressed at applied pressures of 15‐37.5 MPa with 7.5 MPa interval using hydraulic oil extractor for between 10‐40 min. at increment of 10 min. and at the heating temperatures of 80, 90, 100 and 110°C over a period of 15‐30 min. at an increment of 5 min. All the physicochemical properties were determined using AOAC and AOCS methods [AOAC, 1984; AOCS, 1994].

Findings

The free fatty acid, peroxide values and the colour intensity of the oil were affected by the processing parameters; while saponification value, viscosity, specific gravity, refractive index and the iodine value of the oil were not affected by the expression parameters.

Originality/value

Processing parameters were found to affect the quality attributes of free fatty acid, peroxide values and the colour intensity of the oil.

Details

Nutrition & Food Science, vol. 43 no. 4
Type: Research Article
ISSN: 0034-6659

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Book part
Publication date: 24 October 2018

Shola Abidemi Olabode

Abstract

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Digital Activism and Cyberconflicts in Nigeria
Type: Book
ISBN: 978-1-78756-014-7

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Article
Publication date: 26 October 2012

Christopher O. Odudu and Modupe M. Omirin

Urban crop farming as a variant of urban agriculture is a rising phenomenon in food and income generation especially in the developing countries. It is useful in fresh…

Abstract

Purpose

Urban crop farming as a variant of urban agriculture is a rising phenomenon in food and income generation especially in the developing countries. It is useful in fresh food supplies, recycling of urban wastes and poverty alleviation. However, as an informal activity, the greatest challenge it faces is accessibility to land. This tends to undermine the numerous contributions it can make to a city's development in terms of social, economic and environmental developments particularly its influence on climate change, fresh air supply and healthy living of the teaming urban population. There is therefore an urgent need to examine the potentials and risks associated with urban crop farming in order to identify factors that can enhance its productivity and economic viability by improving practitioners’ access to land. The purpose of the paper is to do this.

Design/methodology/approach

The study therefore conceptualized that land accessibility among urban crop farmers can be predicted from identified constraint variables. Respondents in some locations where urban crop farming was found to be thriving well within the Lagos Metropolis were randomly selected and administered with structured questionnaires.

Findings

The data collected were analyzed using factor (principal component) analysis which enabled the construction of a constraints analysis equation or regression equation.

Originality/value

The study identified five constraints affecting land accessibility among urban crop farmers with the most critical factors being affordability and security of tenure.

Details

Journal of Agribusiness in Developing and Emerging Economies, vol. 2 no. 2
Type: Research Article
ISSN: 2044-0839

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Article
Publication date: 12 January 2015

Anna Saiti and Yiannis Papadopoulos

The purpose of this paper (based on the relevant literature) is to: investigate, through empirical analysis, primary school teachers’ perceptions regarding their job…

Abstract

Purpose

The purpose of this paper (based on the relevant literature) is to: investigate, through empirical analysis, primary school teachers’ perceptions regarding their job satisfaction, and examine whether or not the personal characteristics of primary school educators (such as gender, age, family status, educational level, and the total years of service in public primary education) have any impact on their job satisfaction.

Design/methodology/approach

In total, 360 questionnaires were administered to primary school teachers in the metropolitan area of Athens (region of Attiki). The sample was randomly selected. The questionnaire was based on 41 closed and was divided into two sections. The Job Satisfaction Survey developed by Spector (1985) was implemented.

Findings

Greek school teachers are generally satisfied with their profession. There is no statistical correlation between personal characteristics and the overall satisfaction while indicated that teachers are more satisfied with three aspects (subscales) of job satisfaction, namely, “administration,” “colleagues” and “nature of work” and less satisfied with “salary,” “benefits” and “potential rewards.” Age correlates with the levels of satisfaction with reference to administration, potential rewards, colleagues and the nature of work. The overall satisfaction positively correlates with all nine aspects of job satisfaction (subscales) and gender affects the aspects of “promotion” and “colleagues.”

Research limitations/implications

This study only analyzes a small sample from the Athens region and hence the results cannot be used to generalize about the whole of Greece. Since other Greek regions operate in different socio-economic environments, an analysis of additional data from other regions (rural and urban areas) would be necessary to compare and confirm the results.

Originality/value

The findings of this study a valuable extension of other relevant research as it provides the first empirical study of the Greek school system, investigating the relationship between certain aspects of job satisfaction and the personal characteristics of school educators as well as the relationship between these aspects of job satisfaction and total satisfaction. In the context of efficient educational policy, a greater understanding of educators’ job satisfaction could facilitate the development of more effective policy practice that would increase not only the level of educators’ satisfaction, commitment and morale but also improve the performance of the school system.

Details

International Journal of Educational Management, vol. 29 no. 1
Type: Research Article
ISSN: 0951-354X

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Article
Publication date: 21 February 2019

Omobolaji Olubukunmi Obisesan, Kabir Kayode Salman, Kemisola O. Adenegan and Ghene Oghenerueme Obi-Egbedi

Rice processing, an important feature in rice production involving the transformation of harvested paddy into edible rice, is dependent on the type of rice processing…

Abstract

Purpose

Rice processing, an important feature in rice production involving the transformation of harvested paddy into edible rice, is dependent on the type of rice processing techniques used. The purpose of this paper is to analyze the choice of processing techniques among rice processors in Nigeria.

Design/methodology/approach

The study was carried out in Nigeria using structured questionnaires among 410 rice processors selected from four states (Ebonyi, Ekiti, Ogun and Nasarawa) from three geo-political zones (Southeast, Southwest and North-central) of Nigeria. Information on socio-economic characteristics (age, sex, household size, marital status and education) and processing characteristics (experience, paddy source, processing activities, processing techniques, credit and distance) were obtained. Data were analyzed with the use of descriptive statistics and multinomial logistic regression model at 0.05.

Findings

The mean age of processors was 47.8±9.9 years, mean household size was 6.5±4.2 persons and 88.7 percent were married. In total, 73.6 percent had formal education and mean years of experience was 16.4±9.2 years. Main processing activities were parboiling and drying (50.0 percent); milling (40.0 percent); and de-stoning (10.0 percent). In all, 65.7, 20.4 and 13.9 percent used traditional and modern techniques (TMTs), traditional techniques (TTs) and purely modern techniques (PMTs), respectively. The probability of choice of TT relative to TMT reduced by years of education (4.5 percent), paddy source (1.8 percent) and distance to processing center (4.4 percent), while probability of choice of PMT relative to TMT increased for male processors (7.3 percent), membership of association(18.0 percent) and other income sources (6.2 percent).

Research limitations/implications

Level of education of processors and reduction in the distance taken to paddy source reduced choice of TTs.

Practical implications

Other income sources increased the choice of PMTs of rice processing in Nigeria.

Social implications

Processors with high level of education, who also engage in other income generating activities, were able to choose modern processing techniques.

Originality/value

This research was an original research carried out among rice processors in Nigeria.

Details

World Journal of Entrepreneurship, Management and Sustainable Development, vol. 15 no. 1
Type: Research Article
ISSN: 2042-5961

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Article
Publication date: 8 July 2020

İsmail Demirdag and Ayda Eraydin

The growing number of studies shows that government policies and measures are critical in determining entrepreneurship levels of regions. Any changes in the government…

Abstract

Purpose

The growing number of studies shows that government policies and measures are critical in determining entrepreneurship levels of regions. Any changes in the government policies and measures are, therefore, expected to bring significant changes at the entrepreneurship levels. This paper aims to explore the importance of the government policies and measures, along with supply and demand-side determinants in regional entrepreneurship in Turkey and explains the convergence of entrepreneurship among two distinct periods corresponding to changes in the government policies and measures concerning entrepreneurship.

Design/methodology/approach

Looking at a study on 81 NUTS-III regions of Turkey, this paper focusses on regional determinants important in the separation of regions with different entrepreneurship trajectories (based on the initial level and the rate of increase in entrepreneurship). Using discriminant function analysis, this paper tries to show how far government policies are important in distinguishing regions with different entrepreneurship levels.

Findings

The outcomes of the analysis show that certain policies and measures recently introduced have become instrumental in triggering higher entrepreneurship levels in regions with already higher levels of entrepreneurship, but not in regions with initially lower levels of entrepreneurship.

Originality/value

This study contributes to the existing regional entrepreneurship literature through introducing the research findings on the importance of government policies and institutions on regional entrepreneurship, besides the role of regional capacities and assets.

Details

Journal of Entrepreneurship in Emerging Economies, vol. 13 no. 2
Type: Research Article
ISSN: 2053-4604

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Article
Publication date: 7 November 2019

Maram Saeed Sabri and Keith Thomas

This paper aims to investigate psycho-attitudinal features in female entrepreneurs participating in micro, small and medium-sized enterprises in Saudi Arabia, using the…

Abstract

Purpose

This paper aims to investigate psycho-attitudinal features in female entrepreneurs participating in micro, small and medium-sized enterprises in Saudi Arabia, using the Big Five model of personality traits and risk propensity. These attitudes, further grouped into three broad categories, namely, fixed, moderate and growth-oriented mindsets, are used to illustrate the collective impact of attitude over the entrepreneurial process.

Design/methodology/approach

The study is a quantitative study, using a survey to registered business owners and entrepreneurs operating in micro, small and medium businesses in Riyadh, Makkah and Eastern Province, three major administration areas of Saudi Arabia. Survey distribution was through the Chamber of Commerce located in each city. In total, 701 questionnaires were collected with 232 completed responses suitable for use in the study’s empirical findings. The overall response rate was 33 per cent.

Findings

The paper provides practical insights into gender-specific attitudes, including reported variance over the entrepreneurial process. It shows that attitude is an equally predominant feature for both genders through all business stages, with female entrepreneurs reporting a slightly higher growth-oriented attitude relative to their male counterparts. Overall, significant differences were noted between gender and business stages for five of the six-attitudinal growth subscales. From a policy perspective, noting the country’s plan for economic reform and desire for greater participation by women, there are important questions that arise concerning the impact of incentive devices and policy measures.

Research limitations/implications

The main limitation of this study is in the number of women participants, which was small. As participation rates for women rise, there is a good opportunity for future analysis to extend this current study’s findings.

Practical implications

The research uses the Big Five model and risk propensity to explore the important role of attitude in female entrepreneurs. Noting the moderating influence of factors in the macro-environment and the pervasive impact of social norms on women, this study flags some implications for government and policymakers in formulating supportive policies to enable greater uptake by women entrepreneurs with growth-oriented mindsets.

Originality/value

This paper contributes to the literature on the role of gender-specific attitudes through the business stages. This paper presents original research on the attitudes of women in the context of Arabic society.

Details

International Journal of Gender and Entrepreneurship, vol. 11 no. 4
Type: Research Article
ISSN: 1756-6266

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Article
Publication date: 13 July 2015

Adewale Williams Adebayo, Babatunde S Ogunsina and Olasunkanmi Saka Gbadamosi

– This study aims to investigate some physicochemical characteristics of Hildegardia barteri seed oils obtained by cold-pressing and solvent extraction procedures.

Abstract

Purpose

This study aims to investigate some physicochemical characteristics of Hildegardia barteri seed oils obtained by cold-pressing and solvent extraction procedures.

Design/methodology/approach

Crude oil samples were obtained from the kernels by cold pressing and solvent extraction. The physicochemical properties of the oil samples were investigated according to the standard procedures in published works of literature.

Findings

The oil yield was 55.7 and 97 per cent for cold-pressed kariya seed oil (CPKSO) and solvent-extracted kariya seed oil (SEKSO), respectively. Specific gravities, refractive indices, viscosities, iodine value, saponification value, peroxide value and acid value were 0.8742 and 0.9036; 1.4629 and 1.4584; 75.93 and 74.90 mPa.s; 55.78 and 53.56 g of I2/100g of oil; 249.76 and 253.90 mg KOH/g; 4.86 and 5.02 meq KOH/g; 2.12 and 2.09 mg KOH/g of oil for CPKSO and SEKSO, respectively. The physicochemical characteristics of kariya seed oil were not significantly affected by extraction method. The fatty acid profiles of CPKSO and SEKSO showed that the two oil samples contain 24.2 and 23.7, 31.3 and 29.3, 23.2 and 23.7 and 19.6 and 21.3 per cent of myristic, palmitic, stearic and linolenic acids, respectively. Lauric and oleic acids were present in very little proportions of 0.3 and 0.41; and 0.01 and 0.03 per cent, respectively, whereas linoleic acid was 1.4 per cent for the two oil samples. Significant differences in fatty acid profiles were observed for lauric, palmitic and linolenic acids (p = 0.05). Saturated and unsaturated fatty acids were about 79.0 and 77.11 per cent and 21.01 and 22.73 per cent for CPKSO and SEKSO, respectively.

Practical implications

This work promotes H. barteri tree beyond its use as a mere ornamental plant. The non-conventional seed oil it produces may find relevance in the food or biofuels industry subject to further investigation.

Originality/value

This study is the first to document the extraction and physicochemical properties of kariya seed oils.

Details

Nutrition & Food Science, vol. 45 no. 4
Type: Research Article
ISSN: 0034-6659

Keywords

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