COBB DOUGLAS PRODUCTION FUNCTION WITH COMPOSITE ERROR TERM IN EGG LAYING ENTERPRISE IN AKWA IBOM STATE, NIGERIA

ABSTRACT The study tried to estimate the profit efficiency and the relevant indices determining efficiency levels for egg-laying industry in Akwa Ibom State, Nigeria utilizing Cobb-Douglas production function based on stochastic profit frontier. Sixty poultry farms were randomly selected across the six agricultural zones of the state. Primary data were collected with the aid of a structured questionnaire. Empirical results revealed the mean economic efficiency of 65.00% implying the need for increased resource use efficiency The results further showed that variable inputs such as price of feeds, price of drugs and medication were statistically significant (p<0.05) thus indicating that profit decreased with increase in input prices while fixed inputs such as capital inputs and farm size were statistically significant and had the right sign a-priori indicating that profit increased with increase in the level of its utilization. The maximum economic efficiency level attained by an individual farmer was 88.00% indicating that there was room for improvement. The study therefore suggests that policy that would enhance extension services, encourage membership in cooperative farming and enhanced good and adequate utilization of improved livestock inputs should be put in place

Dermatofibrosarcoma Protuberance

Background:Dermatofibrosarcoma protuberance (DFSP) is a relatively uncommon soft tissue neoplasm with intermediate to low grade malignancy, rarely metastasizing to regional lymph node or distant site but with proclivity for local recurrence due to inadequate resection. Methods:We evaluated the clinical histories and treatment outcomes of five consecutive patients who had histologic diagnosis of DFSP in the University of Calabar Teaching Hospital between 2000 and 2004. Results:The five cases reported had histologic diagnosis, sought for after excision. The male: female ratio was 2:3 with an age range of 17-35 years (mean, 26.6 years). Two of the lesions involved the neck and the other three sites involved were the anterior chest wall, groin and proximal thigh. Three of the lesions were recurrent. Conclusion: DFSP is an uncommon tumour, painless, cutaneous and multilobulated lesions should arouse the suspicion of this tumour. Early presentation, pre-operative histologic diagnosis and postoperative evaluation of resection margins would enhance the goal of ensuring adequate excision for improved outcome.Introduction: Protub\ue9rance dermatofibrosarcome (DFSP) neoplasme parties charnues r\ue9lativement peu commun avec une moyenne au niveau de la malignit\ue9 base, rarement m\ue9tastazing \ue0 la lymphe ou si\ue8ge \ue0 distance mais avec le penchant pour une r\ue9cidive locale attribuable \ue0 la resection inad\ue9quate. M\ue9thodes: Nous avons \ue9tudi\ue9 des histoires cliniques et des r\ue9sultats du traitement des cinq patients cons\ue9qutif qui avaient eu un diagnostic histologique de (DFSP) dans le centre hospitalier universitaire du Calabar entre 2000 et 2004. R\ue9sultats: Les cinq cas rapport\ue9s avaient des diagnostiques histologiques, cherch\ue9 apr\ue8s l'excision. La proportion sexe masculin : sexe f\ue9minin \ue9tait 2 :3 avec une \ue2ge moyenne de 17-35 ans (moyen, 26,6 ans). Deux (40%) de la l\ue9sions ont impliqu\ue9 le cou et les trois autres (60%) si\ue8ges concern\ue9s, \ue9taient paroi de la poitrine ant\ue9rieure, l'aine et cuisse proximale. Trois (60%) des l\ue9sions \ue9taient r\ue9currentes. Conclusion: DFSP est une tumeur peu commun, sans douleur, cutaneuse et l\ue9sion multilobulate devront provoquer un soup\ue7on de cette tumeur. Pr\ue9sentation pr\ue9coce diagnostique histologique pr\ue9op\ue9ratoire, et \ue9valuation postop\ue9ratoire des marges de la r\ue9section vont renforcer l'objectif d'assurer \ue9xicion ad\ue9quate pour une am\ue9lioration du r\ue9sulta

Farming Systems in Southeastern Nigeria: Implications for Sustainable Agricultural Production

This study examines the farming systems in southeastern Nigeria. Using a structured questionnaire, 300 farmers were selected through multistage random sampling techniques. The data collected were subjected to descriptive analysis of simple proportions and percentages. Findings from the study revealed that 72% of the respondents engaged in both crop and livestock production. Intercropping was the dominant cropping system with cassava, yam, and maize as the principal arable crops, while cocoa, kolanut, oil palm, rubber, cashew, banana/plantain and citrus were the main permanent crops. The dominant fallow period was found to be three to four years and most farm sizes were less than 2 hectares. The study also showed that 88% of the respondents knew of fertilizer, 61% knew of other agrochemicals, while 56% and 16% utilized them, respectively. Findings generally point to inefficiencies in some of the existing farming practices. Addressing the constraints identified in this study may improve the farming systems in the study area and thus increase agricultural production on a sustainable basis

Diversity and antimicrobial resistance of Salmonella enterica isolated from fresh produce and environmental samples

In Nigeria, as in most developing countries, vegetable farmers depend largely on wastewater for irrigation and on untreated manure for soil enrichment. Salmonella is among the most important foodborne pathogens worldwide with fresh vegetables as major route of transmission to man. A total of 440 samples comprising vegetables and environmental samples (irrigation water and manure treated soil) were analyzed for the presence of Salmonella, resistance and virulence genes and diversity of isolates by genotyping. Samples were obtained from five irrigation fields in Kano and Plateau States and cultured using selective isolation with prior enrichment method. Presumptive isolates were identified and characterized using conventional biochemical methods and Microbact 24E (Oxoid, UK) identification kit. Amplification of virulence (invasive A and enterotoxin) genes by polymerase chain reaction (PCR) further confirmed Salmonella and its virulence potential. Enterobacterial repetitive intergenic concensus (ERIC) fingerprinting PCR showed genetic diversity of confirmed isolates. Confirmed isolates were evaluated for susceptibilities to eight commonly used antimicrobial agents. Sixty-one (13.9%) samples were positive for Salmonella. The distribution of serotypes included; Salmonella typhi (7.7%), Salmonella paratyphi (2.0%) and Salmonella typhimurium (4.1%). S. typhi had the highest isolation rate and was most commonly detected in vegetables. Simultaneous resistance to all antibiotics assayed was found amongst the salmonellae. Fingerprinting pattern of the Salmonella strains from the different samples showed marked similarities and close genetic relatedness. Cluster analysis at a coefficient of similarity of 0.82 grouped the fifteen strains of Salmonella assayed into five different groups. Our results indicate that irrigated vegetables are vehicles of transmission of potentially pathogenic Salmonella isolates that can contribute to the development of salmonellosis and other Salmonella related infections in Nigeria. This study provides data that support the potential transmission strains of Salmonella harboring virulence and resistance factors from vegetables and environmental sources to cause infections in humans

Analysis of upland farm households’ vulnerability to climate variability in the Niger Delta, Nigeria

Analysis of upland farm households’ vulnerability - Gabriel, Edet, *Valerie, Glory, Godwin, Clement, Nkoyo, E. Bassey and Obot Analysis of upland farm households’ vulnerability to climate variability in the Niger Delta, Nigeria The study analysed the vulnerability of upland farm households to climate variability in the Niger Delta. Three states - Akwa Ibom, Ondo and Rivers were selected from the nine states that make up the Niger Delta region. A total of 120 respondents from upland communities of the Niger delta were used for analysis. Household questionnaire and vulnerability questionnaire using Cost Route method were the instruments used for data collection and analysed using Vulnerability Profile and Vulner-ability / Risk Framework. The results of the analysis show that both male and female headed house-holds in all the upland communities were vulnerable to flooding, windstorm, erosion and drying up of streams. Important factors that made households vulnerable to climate hazards were low agricultural output and income, non-availability of irrigation facilities, insufficient farm labour and lack of storage facilities. Technical capacities of household members were assessed using both science-based knowledge as well as indigenous knowledge of climate change as indicators to adaptation to climate variability. It was assumed that the adaptive capacity of households could be enhanced by the number of persons with either science-based knowledge or indigenous knowledge across the re-gion. Expenditure on carbohydrate was higher across the region during disaster time, followed by expenditure in protein, vitamin/minerals and fat and oil and other classes of food, implying that more carbohydrate food is consumed during disaster period than any other class of food. Certain geo-graphical factors such as distance to coastline and population have direct impact on climate variability in the Niger Delta Region. Recommendations include establishment of emergency evacuation systems, income opportunities and support programmes as well as capacity building on climate change knowledge, enterprise development and management. Key words: Farm households, Nigeria, poverty, rural areas, smallholder farmer

Novi pristup spektrofotometrijskom određivanju metronidazola i tinidazola koristeći p-dimetilaminobenzaldehid

A new approach to the spectrophotometric determination of metronidazole (MZ) and tinidazole (TZ) has been developed. The procedure involves coupling of diazotized nitroimidazoles with p-dimethylaminobenzaldehyde (DMAB) to form a greenish-yellow solution. Optimal temperature and time for diazotization were 0 oC (iced) and 3 minutes and 30 oC and 2 minutes for coupling was, respectively, for both MZ and TZ. Coloured adducts of MZ and TZ showed peaks at 406 nm and 404 nm, respectively, which were selected as analytical wavelengths. The reaction with p-DMAB occurred in a 1:1 mole ratio. Beer’s law was obeyed within the 4.8–76.8 µg mL1 concentration range with low limits of detection. The azo adducts were stable for over a week. Molar absorptivities were 1.10 x 103 (MZ) and 1.30 x 103 L mol1 cm1 (TZ). Overall recoveries of MZ and TZ from quality control samples were 103.2 ± 1.3 and 101.9 ± 1.3 % over three days. There was no interference from commonly utilized tablet excipients. No significant difference was obtained between the results of the new method and the BP titrimetric procedures. The azo approach using the p-dimethylaminobenzaldehyde procedure described in this paper is simple, fast, accurate and precise. It is the first application of DMAB as a coupling component in the diazo coupling reaction.U radu je opisan novi način spektrofotometrijskog određivanja metronidazola (MZ) i tinidazola (TZ). Postupak uključuje reakciju diazotiranog nitroimidazola s p-dimetilaminobenzaldehidom (DMAB), pri čemu nastaje zelenkasto-žuta otopina. Optimalna temperatura i vrijeme za diazotaciju su 0 oC (ledena kupelj) i 3 minute, a za reakciju kondenzacije 30 oC i 2 minute. Obojeni adukti imaju maksimum apsorpcije pri 406, odnosno 404 nm pa su te valne duljine izabrane za analitički postupak. Reakcija s p-DMAB zbiva se u množinskom omjeru 1:1. Reakcija slijedi Beerov zakon u koncentracijskom rasponu 4,8–76,8 µg mL1 s niskim granicama detekcije. Azo adukti su stabilni preko tjedan dana. Molarna apsorptivnost bila je 1,10 × 103 (MZ), odnosno 1,30 × 103 L mol1 cm1 (TZ). Ukupni povrat MZ i TZ iz kontrolnih uzoraka bio je 103,2 ± 1,3, odnosno 101,9 ± 1,3 % tijekom tri dana. Nije zamijećena nikakva interferencija uobičajenih pomoćnih tvari koje se koriste za tabletiranje. Ne postoji značajna razlika između rezultata dobivenih novom metodom i rezultata dobivenih BP titrimetrijskim postupkom. Metoda određivanja opisana u ovom radu je jednostavna, brza, pogodna, točna i precizna i po prvi puta uključuje DMAB u reakciji diazo kopulacije

Evaluation of sesamum gum as an excipient in matrix tablets

In developing countries modern medicines are often beyond the affordability of the majority of the population. This is due to the reliance on expensive imported raw materials despite the abundance of natural resources which could provide an equivalent or even an improved function. The aim of this study was to investigate the potential of sesamum gum (SG) extracted from the leaves of Sesamum radiatum (readily cultivated in sub-Saharan Africa) as a matrix former. Directly compressed matrix tablets were prepared from the extract and compared with similar matrices of HPMC (K4M) using theophylline as a model water soluble drug. The compaction, swelling, erosion and drug release from the matrices were studied in deionized water, 0.1 N HCl (pH 1.2) and phosphate buffer (pH 6.8) using USP apparatus II. The data from the swelling, erosion and drug release studies were also fitted into the respective mathematical models. Results showed that the matrices underwent a combination of swelling and erosion, with the swelling action being controlled by the rate of hydration in the medium. SG also controlled the release of theophylline similar to the HPMC and therefore may have use as an alternative excipient in regions where Sesamum radiatum can be easily cultivated

Drivers of diversification and pluriactivity among smallholder farmers—evidence from Nigeria

Diversification and pluriactivity have become a norm among farm business owners (FBOs) due to persistent low farm income. This study applies the resource-based theory to examine drivers of diversification and livelihood income-oriented towards a sustainable livelihood. Our framework develops hypotheses about the impact of internal and external resources on livelihood choices at the household level. We use a survey of 480 rural Nigerian farmers (agripreneurs), applying a Multivariate Tobit to test our framework. We find that education plays the most significant role in all types of employment options. The more FBOs are educated, the more the likelihood that they will choose non-farm or wage employment. This study revealed that while the agriculture sector’s share of rural employment is declining, non-farm is on the increase. More so, there is a decline in farming among the young generation, marital status bias and gender influence in resource allocation. The socioeconomic (income and food security) and socio-cultural (employment and rural-urban migration) implications of rural sustainability linked to UN Development Goals have been highlighted and analysed in this article

Nigeria: macroeconomic environment and the perennial crops

This paper examines the impacts of macroeconomic environment on the output performances of perennial crops – namely cocoa, rubber, palm oil and palm kernel in Nigeria. The time series data used for the analysis reveals agricultural policy/programme instability. Ordinary Least Square estimation shows that most macroeconomic policy variables – exchange rate, interest rate, government expenditure, credit are negatively related to outputs. Technological change and policy shift variables are negative for cocoa but positive for other crops. Collectively, the variables explain between 70 and 85% of the variation in the outputs of the crops considered. Keywords: Macroeconomic environment, perennial crops, Nigeria. [Global Jnl Agric Res Vol.2(1) 2003: 53-61