Knowledge integration and the adoption of new agricultural technologies: Kenyan perspectives

Despite gains in agricultural yields, access to food remains a serious challenge in many parts of the world. It is now recognized that improving food security requires a more integrated understanding of food systems and that key under-explored areas of these systems are likely to be crucial in developing effective policy change. In Kenya, institutional changes have occurred to facilitate knowledge integration within the agricultural sector. Drawing on the experiences and understandings of key stakeholders in Kenya, this paper aims to identify and better understand the barriers to knowledge integration for improved agricultural technologies and their adoption. A number of barriers to the flow of knowledge to and from those working to develop new agricultural technologies and farmers are identified. The results of this study suggest a potential link between farmers?? levels of community organization and levels of trust with levels of knowledge integration surrounding agricultural technologies and their adoption. The findings suggest that increasing the planning and follow-up of newly introduced agricultural technologies has the potential to encourage interdisciplinary approaches and improve food security outcomes.     

Characterisation of cultivars of Jamaican ginger (Zingiber officinale Roscoe) by HPTLC and HPLC

In this study, a novel high performance thin layer chromatography (HPTLC) technique for fingerprinting of Jamaican ginger was developed and its application to the chemo-profiling of four cultivars of Jamaican ginger illustrated. Applications of the method to maturation and storage studies involving ginger oleoresins are also presented. The method showed good resolution of the pungent compounds characteristic of ginger: 6-gingerol, 8-gingerol, 10-gingerol and 6-shogaol, with five other discrete zones being described as additional references. HPTLC fingerprints of the ginger cultivars showed chemical homogeneity with small qualitatively observed differences in the intensities of the gingerol and shogaol zones. Quantification of these compounds by high-performance liquid chromatography (HPLC) revealed significant differences in total pungency among the cultivars. Essential oil yields from the cultivars also varied significantly. The described characterisations will prove useful in the authentication of Jamaican ginger.     

Microbial Concentrations in Sand and their Effect on Beach Water in Door County,Wisconsin

The seasonal variations and patterns of Escherichia coli in Wisconsin's coastal waters have been closely studied in recent years due to increased beach monitoring activities. Patterns of distribution of the indicator organism, E. coli, in the sand at these beaches are now being investigated as a source of E. coli to adjacent beach water. This project investigates the concentrations of E. coli in beach sand, and the relationship between these sand-microbe concentrations and concentrations of microbes in the corresponding beach water. Weekly sampling of upshore, swash, and submerged sand at six beaches provided numbers of the indicator bacteria in each beach's sand substrate for two consecutive summers. Overall concentrations of E. coli were highest in the swash sand of the beach, with the highest numbers seen in the summer months and lowest numbers in the winter months. Each location had very different concentrations of E. coli in the beach sand from 1,800 CFU/100 g to 21,670 CFU/100 g sand. Each location had a very different relationship between the indicator organism found in the beach sand and that found in the beach water. These data suggest that sand may be a reservoir for E. coli at some locations, and another source of contamination that should be considered in beach monitoring programs. However, elevated levels of E. coli in beach sand were not universal and varied greatly from location to location.     

Factors influencing the salience of temporal cues in the discrimination of synthetic Japanese monkey (Macaca fuscata) coo calls.

If temporal position of a frequency inflection is the most salient communication cue in Japanese macaque smooth early and smooth late high coos, then macaques should perceive coos differing only along the early–late dimension as belonging to different classes. The perceived similarity of synthetic coos and temporally reversed variants were evaluated, using multidimensional scaling of macaque discrimination latencies. Original calls and calls temporally reversed in the frequency domain could be discriminated if the peak was near a call endpoint but not if the frequency peak in the original call was near the coo midpoint. Perceived similarity of such calls was inversely related to the amount of frequency modulation. Temporal reversals of amplitude contours were also conducted. Although macaques are quite sensitive to amplitude increments, reversal of the relatively flat amplitude contours of these calls did not affect discrimination responses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Partner smoking status and pregnant smoker's perceptions of support for and likelihood of smoking cessation.

Perceptions of support for cessation of smoking during pregnancy, likelihood of quitting, and partner smoking status were explored in a sample of 688 pregnant smokers (372 baseline smokers and 316 baseline quitters). Women with nonsmoking partners were significantly more likely to be baseline quitters than women with partners who smoked. Baseline quitters reported significantly more positive support from their partners than did continuing smokers (p?=?.02). Neither partner smoking status nor partner support at baseline was associated with cessation or relapse later in pregnancy. Women reported greater support, both positive and negative, from nonsmoking partners than from partners who smoked (p?=?.001). Among partner smokers, those who were trying to quit were perceived to be particularly supportive. Cessation interventions for expectant fathers may increase pregnant women's success at quitting. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychometrically matched visual-processing tasks in schizophrenia spectrum disorders.

Patients with schizophrenia show deficits in visual perception and working memory, but the relationship between these deficits has not been characterized with psychometrically matched tasks. The authors administered 2 visual discrimination and 6 recognition tasks to 43 schizophrenia spectrum patients and 22 nonpsychiatric subjects. When performing difficulty-matched tasks, spectrum subjects showed more severe impairments for motion compared with form processing. When tasks were matched on true score variance, spectrum subjects exhibited worse performance on both form and motion discrimination, and a differential deficit in motion recognition with a short display duration and long interstimulus interval. These results provide evidence of differential deficits in visual processing in schizophrenia that appear to be dependent on the temporal characteristics of the tasks. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Emotional Intelligence and Leadership Behavior in Construction Executives

The study documented in this paper builds upon the concept of multiple intelligences by examining the need for a greater concept of intelligence within the construction profession. Specifically, the paper documents the study of 130 construction executives for their emotional intelligence (EI) as measured by their emotional quotient. In this study, the writers analyze the relationship between EI and leadership behaviors, specifically examining the relationship between EI and transformational leadership behaviors. The paper outlines the strengths and weaknesses found in executives in relation to developing transformational leadership behaviors. Through the use of established testing procedures, the researchers identify five specific components of EI that are related to transformational leadership behavior at a convincing level of statistical significance. Of particular importance is the identification of interpersonal skills and empathy as key EI behaviors that need additional attention during the development of construction industry executives. The writers contend that these traits are as important as classical traits of intelligence and experience in developing the leaders of tomorrow’s construction organizations.     

Stimuli response of cationic polymer brush prepared by ATRP: Application in peptide fractionation

Random cationic copolymer brushes composed of 2-(dimethylamino)ethyl methacrylate (DMAEMA) and N-isopropylacrylamide (NIPAAm) were synthesized using the atom transfer radical polymerization (ATRP) method. The effects of varying the monomer feed ratios (30:70 and 70:30 DMAEMA:NIPAAm) and polymerization times on the film height, morphology and stimuli response to pH of the brush were evaluated. While the polymerization time was found to have little influence on the properties of the brushes, the monomer feed ratios had a great impact. The 70% DMAEMA polymer brush had similar height as the 30% DMAEMA brush after 45 min; however, it had a greater response to pH and morphological change compared to the 30% DMAEMA. The 70% DMAEMA brush was used to demonstrate an efficient approach to alleviate the ion suppression effect in MALDI analysis of complex mixtures by effectively fractionating a binary mixture of peptides prior to MALDI-MS analysis.