187,170 research outputs found
Urban and Peri-urban Agriculture in Kyiv (Ukraine): "Crisis Induced Strategy" versus Recreational Resource
No full textFor the study 240 Kyiv households with urban and peri-urban agriculture (UPA) have been surveyed in 2005. Quotas were assigned to four different types of plots. A standardized questionnaire was developed to collect data on crop and animal production, inputs, sales of produce for income, importance of the plot for self-sufficiency, recreation and leisure time. A factor analysis is employed to reduce attitudinal data. Based on factor scores a cluster analysis is conducted to segment the respondents into more homogeneous groups and to show multiple purposes of UPA. Four clusters labeled as “Seekers of leisure activities”, “UPA-dependent growers”, “Recreation-oriented growers” and “Little engaged growers” are created. Multiple purposes of UPA are shown by profiling the clusters due to demographic, socioeconomic and other selected characteristics. The results show that depending on the type of plot the importance of UPA shifts from livelihood necessity to recreational resource or combines both.Urban and peri-urban agriculture, livelihood, Ukraine, Farm Management,
Conformational dependence of through-space tellurium-tellurium spin-spin coupling in peri-substituted bis(tellurides)
No full textThe work in this project was supported by the Engineering and Physical Sciences Research Council (EPSRC). M.B. wishes to thank EaStCHEM and the University of St Andrews for support.Three related series of peri‐substituted bis(tellurides) bearing naphthalene, acenaphthene and acenaphthylene backbones (Nap/Acenap/Aceyl(TeY)2 (Nap=naphthalene‐1,8‐diyl N ; Acenap=acenaphthene‐5,6‐diyl A ; Aceyl=acenaphthylene‐5,6‐diyl Ay ; Y=Ph 1 ; Fp 2 ; Tol 3 ; An‐p 4 ; An‐o 5 ; Tp 6 ; Mes 7 ; Tip 8 ) have been synthesised and their solid‐state structures determined by X‐ray crystallography. Molecular conformations were classified as a function of the two C9‐C‐Te‐C(Y) dihedral angles (θ); in the solid all members adopt AB or CCt configurations, with larger Te(aryl) moieties exclusively imposing the CCt variant. Exceptionally large J(125Te,125Te) spin–spin coupling constants between 3289–3848 Hz were obtained for compounds substituted by bulky Te(aryl) groups, implying these species are locked in a CCt‐type conformation. In contrast, compounds incorporating smaller Te(aryl) moieties are predicted to be rather dynamic in solution and afford much smaller J values (2050–2676 Hz), characteristic of greater populations of AB conformers with lower couplings. This conformational dependence of through‐space coupling is supported by DFT calculations.Peer reviewe
Linee guida per la messa a punto dei sistemi aziendali di autocontrollo dell'igiene, il metodo Peri
No full textThe composition and nutritional properties of extra-virgin olive oil
No full textChapter 3 gives basic information about the composition and nutritional properties of extra-virgin olive oil. As triglycerides make up 97 to 99% of extra-virgin olive oil, the main chemical-physical characteristics of the oil depend on the composition of the triglyceride moiety. However, the minor components give an invaluable contribution to sensory and health-promoting properties. It is mainly the presence of these components that differentiates extra-virgin olive oil from all other edible oils
Peri-urbanisation, Social Heterogeneity and Ecological Simplification
No full textPeri-urban development pressure on and near Australian coastlines is resulting in the conversion of agricultural land for rural-residential use. The impact of larger and more diverse human populations upon the ecological assets remaining in agricultural landscapes has consequently become a policy concern. This paper contributes to these policy debates by integrating the results of parallel social and ecological research projects commissioned to improve natural resource management in peri-urbanising regions. The research was undertaken in the case study region of South East Queensland, the region supporting Australia’s most rapid population growth. Our results indicate that both social and ecological communities cross a fragmentation threshold due to peri-urban development whereby they become ecologically simple and socially heterogeneous in a coupling that cedes a poor diagnosis for biodiversity retention.stored soil water, dryland grain cropping, extension, social systems, RD&E, differentiation
Study of the bread baking process - II. Mathematical modelling
No full textA mathematical model of baking was set up and validated experimentally. The model describes heat and mass transport phenomena during baking of a cylindrical bread sample. The model was solved by finite difference numerical method. The model is based on the hypothesis described in a previous work (Zanoni, B., Peri, C. & Pierucci, S. (1993). J. Food Eng., 19, 383-98), that the variation in temperature and moisture of bread during baking is determined by the formation of an evaporation front at 100°C. The progressive advancing of the evaporation front towards the inside of the product determines different conditions of heat and mass transport in a crust and crumb portion. The validation shows that the model correctly simulates heat and mass transfer during baking. © 1994
On the geometric structure of lattice U-polygons
No full textAbstractLet U be a finite set of directions in the Euclidean plane. A convex polygon P is a U-polygon if for each vertex v of P and for each u∈U the line with direction u through v meets a vertex of P different from v. We study the geometric structure of lattice U-polygons and introduce the notion of class of a U-polygon. We then characterize the lattice U-polygons of class c⩾4. On the other hand, if P is a lattice U-polygon of class c<4, we describe a few geometric properties of P
Indicadores de risco para a peri-implantite
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Odontologia, Florianópolis, 2014.O objetivo deste estudo foi identificar os indicadores de risco sistêmicos e locais associados com a peri-implantite e sua prevalência. Os critérios de inclusão para o estudo compreenderam: pacientes tratados com implantes de titânio Implacil De Bortoli (São Paulo, Brasil) na Fundação para o Desenvolvimento Científico e Tecnológico da Odontologia (FUNDECTO), da Universidade de São Paulo (USP), no período de 1998 a 2012. Foram examinados 183 pacientes, reabilitados com 916 implantes em função por pelo menos 1 ano. As variáveis foram avaliadas segundo condição sistêmica do paciente, características do implante, coroa protética e parâmetros clínicos. A regressão logística não demonstrou associação de características do implante com a PI. Houve correlação estatística positiva para histórico de doença periodontal (DP), próteses cimentadas, presença de facetas de desgaste na coroa protética e próteses totais. A PI apresentou risco aumentado em 2.20 vezes para histórico de DP, 3.62 vezes para próteses cimentadas em relação às parafusadas, 2.43 vezes na presença de facetas de desgaste na coroa protética e 16.11 vezes para próteses totais em relação as parafusadas. Foram relacionados como indicadores de risco para a PI histórico de DP, próteses cimentadas, presença de facetas de desgaste na coroa protética e próteses totais. As características dos implantes não foram relacionadas com a PI.Abstract : The aim of this study was to identify systemic and local risk indicators associated with peri-implantitis (PI) and its prevalence. Inclusion criteria for the study were patients treated with osseointegrated implants (Implacil De Bortoli, Sao Paulo, Brazil) at FUNDECTO (University of Sao Paulo, USP), from 1998 to 2012. There were examined 183 patients, rehabilitated with 916 implants in function for 1 year at least. Variables were evaluated according to patient's systemic condition, implant's characteristics, prosthetic crown and clinical parameters. Logistic regression did not show any association between implant's characteristics with PI. Also, it was identified an increased risk of 2.20 times for historic of periodontal disease (PD), 3.62 times for cemented restorations compared to screw-retained, 2.43 times when displayed wear facets on the prosthetic crown and 16.11 times for total rehabilitations when compared to single rehabilitations. There were related as risk indicators for PI the historic of periodontal disease, cemented prostheses, presence of wear facets on the prosthetic crown and in total rehabilitations. Implants' characteristics were not related with PI
Diagnóstico das cianobactérias na Lagoa do Peri, Florianópolis, SC e a legislação sobre água para consumo humano
No full textTCC(graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Biológicas. Biologia.A Lagoa do Peri, situada dentro de uma área protegida, o Parque Municipal da Lagoa do Peri, constitui o maior corpo de água doce da ilha de Santa Catarina e é utilizada pela CASAN, para abastecimento das populações do leste e sul da mesma. Em virtude da sua importância, vários estudos têm sido realizados no local, os quais revelaram a presença de cianobactérias produtoras de toxinas do grupo das saxitoxinas. Com base na legislação sobre água para consumo humano em vigor, a Portaria 2.914/MS/2011, esse estudo foi realizado com o objetivo de avaliar as densidades de cianobactérias e indicar medidas a serem tomadas pelos responsáveis do sistema de abastecimento de água. As coletas foram realizadas uma vez no outono, inverno e primavera. No presente estudo, a espécie Cilindrospermopsis raciborskii foi sempre dominante em todas as coletas acompanhada por Limnothrix sp e Planktolyngbya limnetica, em densidades significativas. As densidades de cianobactérias encontradas, variaram entre 587.884 cél.mL-1 e 1.126.250 cél.mL-1, sendo superiores a 20.000 cél.mL-1, o que exige análise com freqüência semanal de cianotoxinas na água do manancial. Como a C. raciborskii foi dominante e é produtora de saxitoxinas na Lagoa do Peri, deve-se realizar análise semanal dessa toxina, que não pode ultrapassar 3,0 μg de equivalente STX/L na água a ser distribuida para a população. Análises de microcistinas também devem ser feitas já que foram encontradas densidades de Planktolyngbya limnetica e Limnothrix sp. maiores que 10.000 cel.mL-1. Análise de cilindrospermopsina deve ser feita pelo menos uma vez, para confirmar a ausência de produção desta toxina na lagoa do Peri.The Peri lake located in a protected area is the biggest water body of Santa Catarina island and is used by the CASAN to supply the southern and eastern populations of this island. Because its importance, several studies have been conducted in the site, which revealed the presence of cyanobacteria that produce cyanotoxins of the saxitoxins group. Based on drinking water current law, the ordinance 2.914/MS/2011, this study has been conducted in order to evaluate the cyanobacteria densities and indicate the measures to be taken by the authorities in this water supply system. Samples were colected once in autumn, winter and spring. In this study, the C. raciborskii specie was always dominant in all of the samples followed by Limnothrix sp and Planktolyngbya limnetica in significant densities. The cianobacterial densities varied between 587.884 cel.mL-1 and 1.126.250 cel.mL-1, exceeding 20.000 cel.mL-1, which requires analysis with weekly frequency of cyanotoxins in the water supply system. As the C. raciborskii was dominant and is a saxitoxin producer in Peri lake, the water supply system must perform the analysis of this toxins weekly that may not exceed 3,0 μg STX equivalents/L in the water to be distributed to the population. Because the densities of Planktolyngbya limnetica and Limnothrix sp. found exceed 10.000 cels.mL-1, microcystins analysis must be performed. Cylindrospermopsins analysis must be performed at least once to confirm the absence of this toxin in the Peri lake
Water poverty in the peri-urban territories of Mumbai, India
No full textThis paper addresses water poverty in the peri-urban areas of Mumbai. The term "water poverty" refers to a variety of situations where people lack from sufficient water in terms of quality and quantity or from enough money to buy water from formal and informal providers. The aim of this paper is to identify "water poor peri-urban population" and examine their access to water and how they satisfy their needs. Peri-urban areas are undergoing rapid transformations in the form of economic development, urbanization, demographic changes, environmental hazards all of which are having implications on the demand and supply of water. The water policies are not able to adapt to these rapid transformations. Therefore, a growing population lacks from sufficient access to water, in terms of being supplied by a large distribution network, or by private operators using alternative means.demand of water ; water poverty ; access to water ; peri-urban aera ; India ; Mumbai
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