Atrito e desgaste de recobrimentos de PET, politeraftalato de etileno, pós-consumo processados por aspersão térmica Friction and wear of a thermal sprayed PET - poly(ethylene teraphthalate coating

Directory of Open Access Journals (Sweden)

Rogério A. X. Nunes

2007-09-01

Full Text Available A aspersão térmica envolve processos de recobrimentos que podem utilizar materiais cerâmicos, poliméricos, metálicos ou misturas destes. O material a ser depositado é fundido total ou parcialmente. As partículas aquecidas são aceleradas e projetadas em direção a uma superfície devidamente preparada, onde se formam camadas com estrutura lamelar. Os efeitos das variáveis do processo de aspersão, pressão dos gases de combustão, taxa de alimentação e gás de arraste no transporte do material, sobre a resistência ao desgaste e atrito de filmes PET foram investigados. Os recobrimentos de PET foram caracterizados através do desgaste micro-abrasivo, utilizando o ensaio de caloteste, e da medida dos coeficientes de atrito, com o ensaio de pino-sobre-disco. Os valores do coeficiente de desgaste abrasivo e do coeficiente de atrito dos recobrimentos são comparados com os valores da garrafa PET utilizada como referência. Os coeficientes de desgaste encontrados foram similares aos valores de garrafas PET da ordem de 10-5. As análises estatísticas dos resultados deste trabalho indicam que os efeitos das interações das três variáveis, pressão dos gases de combustão, taxa de alimentação e gás de arraste foram significativos para o coeficiente de desgaste e não significativos para o coeficiente de atrito.The thermal spray technique involves coating processes that can use ceramic, polymers, metallic materials or a blend of these. The material to be deposited is melted totally or partially, where the heated particles are accelerated and projected toward a prepared surface forming layers with a lamellar structure. The effect of the spray process parameters such as, combustion pressure, feed rate and carrier gas, on the wear resistance and friction of PET films was evaluated. The PET coatings were characterized by measuring the wear coefficient through the calowear type testing and the friction coefficients using pin-on-disk testing

Influência da criação de um serviço de tratamento da dor aguda nos custos e no consumo de drogas analgésicas na sala de recuperação pós-anestésica Influencia de la creación de un servicio de tratamiento del dolor agudo en los costos y en el consumo de drogas analgésicas en la sala de recuperación pos-anestésica Influence of acute pain management service on analgesic drugs cost and consumption in the post-anesthetic recovery unit

Directory of Open Access Journals (Sweden)

Marcos Emanuel Wortmann Gomes

2003-12-01

Full Text Available JUSTIFICATIVA E OBJETIVOS: Sabe-se que a dor aguda pós-operatória apresenta grande influência na evolução dos pacientes cirúrgicos. Mobilização precoce, menor tempo de hospitalização, diminuição de custos e maior satisfação são resultados do adequado manuseio da dor. Observa-se uma tendência mundial ao surgimento de serviços especializados no tratamento da dor pós-operatória. O presente estudo visa descrever a influência da criação de um serviço de tratamento da dor aguda pós-operatória nos custos e no consumo de analgésicos na sala de recuperação pós-anestésica. MÉTODO: Durante os anos de 2000 e 2001 foi realizada coleta prospectiva de dados, através de sistemas informatizados especialistas da Controladoria de nossa instituição, relativos ao consumo e custo de drogas analgésicas na sala de recuperação e ao número de cirurgias realizadas. RESULTADOS: Houve um aumento do consumo e dos custos com analgésicos, assim como uma modificação no perfil de utilização dos mesmos. CONCLUSÕES: A criação do Serviço de Tratamento da Dor Aguda (STDA em nossa instituição determinou uma mudança no perfil dos analgésicos utilizados. Houve um aumento de consumo e nos custos dessas drogas, sugerindo que os pacientes tiveram um melhor controle da dor pós-operatória.JUSTIFICATIVA Y OBJETIVOS: Se sabe que el dolor agudo pos-operatorio presenta gran influencia en la evolución de los pacientes quirúrgicos. Movilización precoz, menor tiempo de hospitalización, diminución de costos y mayor satisfacción son resultados del adecuado manoseo del dolor. Se observa una tendencia mundial al surgimiento de servicios especializados en el tratamiento del dolor pos-operatorio. El actual estudio tiene por finalidad describir la influencia de la creación de un servicio de tratamiento del dolor agudo pos-operatorio en los costos y en el consumo de analgésicos en la sala de recuperación pos-anestésica. MÉTODO: Durante los a

Poli(tereftalato de etileno, PET: uma revisão sobre os processos de síntese, mecanismos de degradação e sua reciclagem Poly(ethylene terephthalate, PET: a review on the synthesis processes, degradation mechanisms and its recycling

Directory of Open Access Journals (Sweden)

Wanderson Romão

2009-06-01

Full Text Available Apresentamos uma revisão sobre o poli(tereftalato de etileno enfatizando os processos de síntese e os mecanismos de degradação. Atualmente o Brasil apresenta um dos maiores índices mundiais de reciclagem mecânica deste polímero, correspondendo a um percentual de 53%. O sucesso desse termoplástico na indústria de reciclagem deve-se à sua ampla diversidade de aplicações, desde a indústria têxtil (multifilamento até as indústrias de alimentos, onde as embalagens recicladas grau alimentício poderão ser misturadas com a resina virgem em diversas proporções e reprocessadas para o uso. Uma abordagem sobre a atual legislação do uso de PET reciclado em contato com alimentos também é mostrada neste trabalho. No processo de síntese do PET realizado em duas ou três etapas, são usados comonômeros e aditivos para otimizar as condições de processamento do material. Entretanto, tanto durante a síntese como no processo de reciclagem, ocorrem reações de degradação (termomecânica e termo-oxidativa e reações secundárias, formando acetaldeído, oligômeros, e o dietileno glicol. A presença desses "contaminantes" acelera o processo de degradação do polímero, afetando a qualidade do produto final.We present a review on poly(ethylene terephthalate, emphasizing the synthesis processes and the degradation mechanisms. Brazil is currently among the countries that most recycle PET, with 53% of this polymer being mechanically recycled. The success of this thermoplastic in the recycling industry is due to its large diversity of applications, from the textile industry to food packaging, where the food grade recycled packages will be mixed with the pristine resin for reprocessing and use. We also discuss the present legal aspects concerning PET recycling and its use in contact with food. In the synthesis of PET, usually done in two or three steps, several co-monomers and additives are used to optimize the final properties and

Toxicidad por óxido de etileno

Directory of Open Access Journals (Sweden)

Téllez M. Jairo A.

1993-08-01

Full Text Available

El óxido de etileno, es un compuesto epóxido gaseoso, ampliamente utilizado en nuestro medio como agente esterilizante y de desinfección en instituciones hospitalarias. Los estudios realizados en varios países han demostrado efectos sobre la salud humana, caracterizados por  hipersensibilidad dérmica, irritación del tracto respiratorio, irritación ocular, excitación del S.N.C. y se asocia con presencia de abortos expontáneos, aberraciones cromosómicas e irritación crónica de laringe y tráquea en personal expuesto ocupacionalmente.

Mivoq Evalita 2016 PosTwITA tagger

OpenAIRE

Paci, Giulio

2017-01-01

The POS tagger developed by Mivoq to tag tweets according to PosTwITA task guidelines as defined at Evalita 2016 is presented. The system obtained third position with 92.7% of accuracy. Si presenta il POS tagger sviluppato da Mivoq per etichettare i tweet secondo le linee guida del task PosT-wITA, cos come definite per Evalita 2016. Il sistema ha ottenuto la terza posizione con un accuratezza del 92.7%.

Pengaruh Sistem Rekrutmen dan Penempatan Kerja Terhadap Kinerja Karyawan pada Kantor PT. Pos Indonesia (Persero) Kantor Pos Medan 20000

OpenAIRE

Febrianto

2015-01-01

The purpose of this study was to determine and analyze the influence of the system of recruitment and placement of the work performance of employees at PT. Pos Indonesia (Persero) Kantor Pos Medan 20000. This type of research is explanatory. The sample in this study were employees of PT. Pos Indonesia (Persero) Kantor Pos Medan 20000, amounting to 51 people. The data used is secondary data. Primary data was collected using a questionnaire. The analytical method used is descriptive analysis me...

Atmosfera modificada e controle de etileno para bananas 'Prata-Anã' cultivadas na Amazônia Setentrional Brasileira

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Marcos André de Souza Prill

2012-12-01

Full Text Available O presente trabalho teve por objetivo avaliar o efeito da atmosfera modificada (AM pelo uso de embalagem plástica de polietileno de baixa densidade (PEBD, do vácuo e da adsorção de etileno, visando à manutenção da qualidade das bananas 'Prata-Anã' produzidas em Roraima. As análises foram realizadas em intervalos de 5 dias após a colheita, até 35 dias de armazenamento refrigerado (AR. Verificou-se que os frutos submetidos a embalagem de PEBD apresentaram as menores perdas de massa fresca quando comparados aos demais. Da mesma forma, os frutos embalados na presença do adsorvedor de etileno obtiveram a melhor manutenção na coloração da casca, atraso temporal, do pico climatérico, assim como o retardamento na degradação do amido, os menores incrementos de sólidos solúveis e acidez titulável, as menores concentrações de etileno nos interiores das embalagens e atraso temporal e a diminuição da atividade enzimática. Isso, possivelmente, proporcionou os maiores teores de pectina total e solúvel ao final do período experimental. A combinação do uso da embalagem de PEBD com o sachê de permanganato de potássio (KMnO4 resultou no retardamento do processo de maturação dos frutos de banana 'Prata-Anã', quando armazenada a 12 ºC. Pode-se atribuir esse efeito benéfico à presença do sachê na adsorção de etileno e, consequentemente, na ação do etileno no amadurecimento dos frutos, retardando a senescência das bananas 'Prata-Anã'.

Long conduction time POs experiments on MITE

International Nuclear Information System (INIS)

Woodall, H.N.; McDaniel, D.H.; Mendel, C.W.; Rochau, G.E.; Zagar, D.M.; Simpson, W.W.; Zuchowski, N.P.

1990-01-01

MITE is a power flow test bed that has been modified to conduct experiments in high power plasma opening switch (POS) technology and apply this technology to Inertial Confinement Fusion. The goal of the experiment is to develop a plasma opening switch that conducts megampere currents for 300 ns, then opens in 5--10 ns. MITE/POS is an advanced power flow experiment that uses a magnetically insulated transmission line (MITL) as the inductive energy store and as a means to shape the output pulse. This experiment demonstrates that a simplified, lower-cost facility can be built by eliminating water pulse-forming lines and water-switching. Another advantage of this approach is that high energy efficiency at peak power can be achieved. The disadvantage is that a new technology, the triggered POS, must be implemented. The triggered POS is necessary for synchronization of multiple modules with a long conduction-time POS. The MITE facility has been modified to drive a 250 nH, 16.6 Ohm MITL at 0.9 MA to accommodate this power flow experiment. A MITL inductive energy storage of 101 kJ is available for POS switching to a matched load. Experiments have been conducted using segmented flashboards and magnetic-field controlled plasma sources. These experiments will lead to the development of the triggered POS. The initial experiments with plasma conduction times of 120 ns to 800 ns are discussed

PET after use. From problem to opportunity; PET post-consumo. Da problema a opportunita'

Energy Technology Data Exchange (ETDEWEB)

Chiacchio, G.; Malinconico, M. [Consiglio Nazionale delle Ricerche, Arcofelice, NA (Italy). Istituto di Ricerca e Tecnologia delle Materie Plastiche; Santacesaria, E.; Di Sero, M. [Naples Univ. Federico 2. (Italy). Dipt. di Chimica

1999-04-01

Due to collection, separation and legislation problems, the only type of PET suitable for recycling, is, at moment, the polymer employed in liquid containers or, more precisely, PET from drink bottles. The paper refer to the most up-to-date strategies to overcomes typical problems occurring during physical recycling of PET (hydrolytic and thermal degradation). Among others, a recent procedure is cited, that utilizes p-hydroxybenzoic acid and titanium tetraisopropylate. As far as chemical recycling is concerned, alternative methodologies to PET glycolysis (normally employing ethyleneglycol to obtain monomers) using unsaturated diols to obtain polyesters suitable for production of thermosetting resins, are reported. Finally, chemical recycling of PET to produce alkyl-phthalates (well know plasticizers for thermoplastic polymers) is described. [Italian] L'unico tipo di PET che si presta concretamente ad essere impiegato in processi di riciclo e', attualmente, quello che deriva da contenitori per liquidi ed in particolare da bottiglie per bevande. Nel lavoro si fa riferimento alle strategie piu' recenti per ovviare ai problemi tipici del riciclo fisico del PET e ai metodidi riciclo chimico, mediante metodologie alternative di glicolisi del PET. Viene anche esposta una via alternativa di produzione di esteri alchil-ftalici (noti plastificanti per polimeri termoplastici).

Identification of Staphylococcus species and subspecies with the MicroScan Pos ID and Rapid Pos ID panel systems.

Science.gov (United States)

Kloos, W E; George, C G

1991-01-01

The accuracies of the MicroScan Pos ID and Rapid Pos ID panel systems (Baxter Diagnostic Inc., MicroScan Division, West Sacramento, Calif.) were compared with each other and with the accuracies of conventional methods for the identification of 25 Staphylococcus species and 4 subspecies. Conventional methods included those used in the original descriptions of species and subspecies and DNA-DNA hybridization. The Pos ID panel uses a battery of 18 tests, and the Rapid Pos ID panel uses a battery of 42 tests for the identification of Staphylococcus species. The Pos ID panel has modified conventional and chromogenic tests that can be read after 15 to 48 h of incubation; the Rapid Pos ID panel has tests that use fluorogenic substrates or fluorometric indicators, and test results can be read after 2 h of incubation in the autoSCAN-W/A. Results indicated that both MicroScan systems had a high degree of congruence (greater than or equal to 90%) with conventional methods for the species S. capitis, S. aureus, S. auricularis, S. saprophyticus, S. cohnii, S. arlettae, S. carnosus, S. lentus, and S. sciuri and, in particular, the subspecies S. capitis subsp. capitis and S. cohnii subsp. cohnii. The Rapid Pos ID panel system also had greater than or equal to 90% congruence with conventional methods for S. epidermidis, S. caprae, S. warneri subsp. 2, S. xylosus, S. kloosii, and S. caseolyticus. For both MicroScan systems, congruence with conventional methods was 80 to 90% for S. haemolyticus subsp. 1, S. equorum, S. intermedius, and S. hyicus; and in addition, with the Rapid Pos ID panel system congruence was 80 to 89% for S. capitis subsp. ureolyticus, S. warneri subsp. 1, S. hominis, S. cohnii subsp. urealyticum, and S. simulans. The MicroScan systems identified a lower percentage (50 to 75%) of strains of S. lugdunensis, S. gallinarum, S. schleiferi, and S. chromogenes, although the addition of specific tests to the systems might increase the accuracy of identification

Efeito compatibilizante de copolímeros contendo segmentos líquido-cristalinos em misturas com poli(tereftalato de etileno e um poliéster líquido-cristalino termotrópico (TLCP

Directory of Open Access Journals (Sweden)

Novack Kátia M.

1999-01-01

Full Text Available Uma série de copolímeros com segmentos líquido-cristalinos foram sintetizados por policondensação em solução a alta temperatura e misturados com poli(tereftalato de etileno (PET e um poliéster líquido-cristalino termotrópico (TLCP, previamente sintetizado. Os copolímeros foram utilizados com sucesso como compatibilizantes nas misturas PET/TLCP. As técnicas de caloria diferencial de varredura, análises dinâmico-mecânicas, análises térmicas e microscopia eletrônica (SEM foram utilizadas na caracterização dos polímeros. Foi verificada boa processabilidade e diminuição da velocidade de cristalização das misturas. As micrografias das superfícies fraturadas das amostras, obtidas das análises de SEM, mostraram melhor miscibilidade para as misturas com maior teor de copolímero.

Síntese e Caracterização de Nanocompósitos de Poli(3-hidroxibutirato) - PHB/ZnO e Poli(tereftalato de etileno) - PET/ZnO

OpenAIRE

LIMA JÚNIOR, Reginaldo Gomes de

2015-01-01

Neste trabalho o óxido de zinco nanoestruturado (ZnOnano) foi incorporado em duas matrizes poliméricas: o poli(hidroxibutirato), e o poli(tereftalato de etileno), com o objetivo de avaliar o efeito desta adição nas propriedades físicas, químicas, bem como a atividade antimicrobiana para o nanocompósito PHB/ZnOnano, tendo como referência a bactéria Escherichia coli. Filmes de PHB/ZnOnano foram produzidos por casting, com parâmetros de síntese obtidos a partir de um planejamento experimental 24...

Aplicação de 1-metilciclopropeno associado ao etileno para minimizar seus efeitos na inibição do amadurecimento do mamão 'golden'

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Marcos José Trevisan

2013-06-01

Full Text Available O objetivo deste trabalho foi estudar a fisiologia e a conservação pós-colheita de mamões 'Golden', submetidos à aplicação simultânea de 1-metilciclopropeno e etileno. Os frutos foram provenientes de cultivo comercial no Espírito Santo, no estádio de maturação 1. Os tratamentos foram compostos pelas seguintes combinações de 1-MCP (nL. L-1 + etileno (µL. L-1: 0+0; 100+0; 100+2,5; 100+5 e 100+10. Os tratamentos com 1-MCP e 1-MCP mais 2,5 µL. L-1 de etileno foram os que mais retardaram a perda da firmeza e a mudança da cor. Foi observada diferença na atividade respiratória entre o controle e os demais tratamentos. Inicialmente, a produção de etileno foi maior nos frutos do controle e menor naqueles com 1-MCP, a qual aumentou a partir do 10º dia. Não houve diferença no teor de sólidos solúveis entre os tratamentos. Quanto ao teor de ácido ascórbico, tratamentos com 1-MCP e 1-MCP mais 2,5 µL. L-1 de etileno apresentaram os teores mais elevados. Os tratamentos apresentaram notas de aparência acima de quatro ao final do armazenamento, ou seja, com boa aparência. Com estes resultados, é possível afirmar que existe potencial de uso do 1-MPC associado ao etileno, nos estádios iniciais de maturação do mamão 'Golden', para aumentar sua vida pós-colheita.

Resposta da maçã cv. Fuji ao etileno no armazenamento em atmosfera controlada Response of Fuji apples to ethylene in controlled atmosphere storage

Directory of Open Access Journals (Sweden)

Auri Brackmann

2001-12-01

Full Text Available Conduziu-se um experimento com o objetivo de avaliar o efeito das concentrações de etileno sobre a manutenção da qualidade e ocorrência de distúrbios fisiológicos na maçã cv. Fuji armazenada em atmosfera controlada (AC com 1kPa de O2 e 0,2kPa de CO2 na temperatura de 0,5ºC. O delineamento experimental foi o inteiramente casualizado com três repetições. Os tratamentos avaliados foram: 0,25; 20; e, 800m.L-1 de etileno. As avaliações foram realizadas após nove meses de armazenamento, no momento da abertura das câmaras e após sete dias de exposição a 25ºC. Somente os frutos mantidos em 800m.L-1 de etileno durante o período de conservação em AC foram influenciados pelo etileno, apresentando maior respiração e síntese de etileno, menor firmeza de polpa e cor de fundo da epiderme mais amarela do que aqueles armazenados com 0,25 ou 20m.L-1 de etileno na atmosfera da câmara. A maçã 'Fuji' apresentou baixa sensibilidade a altas concentrações de etileno durante o armazenamento em AC, não se justificando a sua absorção em câmaras comerciais.The experiment was carried out aiming to evaluate the effect of ethylene concentrations on the quality and occurrence of physiological disorders on Fuji apples stored in controlled atmosphere (CA with 1kPa O2 / 0,2kPa CO2 at 0.5ºC. The treatments applied were: 0.25; 20; and 800m.L-1 ethylene. The evaluations were accomplished after nine months of storage, at the opening of the chambers and after seven days in shelf life (25ºC. Only the fruits kept at 800m.L-1 ethylene during storage period were influenced by the ethylene, showing higher respiration and ethylene biosynthesis, lower firmness and more yellow background color of the peel than those stored with 0.25 or 20m.L-1. Fuji apples presented low sensibility to high ethylene concentrations during storage in AC, therefore absorption is not recomended in commercial storage rooms.

Modificação química de poli(tereftalato de etileno pós-consumo por reação com ácido sulfúrico: estrutura e propriedades Chemical modification of post consumer poly(ethylene terephthalate by sulfuric acid reaction: structure and properties

Directory of Open Access Journals (Sweden)

Janaína G. Alonso

2005-03-01

Full Text Available PET pós-consumo foi modificado quimicamente através de reação com ácido sulfúrico por diferentes tempos. O material modificado foi caracterizado por DSC e FTIR-PAS e XPS. Verificou-se que a intensidade relativa do isômero trans diminui enquanto do isômero gauche aumenta para tempos de reação entre 0 e 60 minutos. Após 60 minutos de reação observou-se a presença de endotermas múltiplas que podem ser relacionadas com o desenvolvimento de estruturas intermediárias porque as intensidades relativas dos isômeros trans e gauche não apresentam variação significativa. O valor determinado de capacidade de troca iônica do PET pós-consumo modificado (PETS-pc é comparável com os valores de resinas ácidas comerciais e não é afetado no intervalo de tempo de reação utilizado. Os valores da capacidade máxima de adsorção, qm, e do parâmetro de afinidade entre o adsorvente e o adsorvato, K, (111,18 ppm e 531,91 mg de corante/100g de adsorvente, respectivamente para a adsorção do corante Remazol vermelho na amostra quimicamente modificada por 30 minutos foram calculados a partir da isoterma de adsorção de Langmuir. Os resultados indicam que esse material possui características adsorventes, podendo vir a ser utilizado para tratamento de efluente de indústria de tingimento têxtil.Chemical modification of post consumer PET was carried out by reaction with sulfuric acid. The modified material was characterized by DSC, XPS and FTIR-PAS measurements. The relative intensity of trans isomer increases while it decreases for gauche isomer for reaction times from 0 up to 60 min. After 60 minutes of reaction multiple endotherms were observed, which may be related to the development of an intermediated structure, since the relative intensities of the trans and gauche isomers do not change. The ionic exchange capacity of the modified post consumer poly(ethylene terephthalate, PETS-pc, is comparable to commercial acid resins and is not

Chemical recycling of post-consumer PET: structural characterization of terephthalic acid and the effect of Alkaline Hydrolysis at low temperature; Reciclagem quimica do PET pos-consumo: caracterizacao estrutural do acido tereftalico e efeito da hidrolise alcalina em baixa temperatura

Energy Technology Data Exchange (ETDEWEB)

Fonseca, Talitha Granja; Almeida, Yeda Medeiros Bastos de; Vinhas, Gloria Maria, E-mail: gmvinhas@yahoo.com.br [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Engenharia Quimica

2014-09-15

Due to the environmental impact caused by PET packaging disposal, this material recycling has been thoroughly discussed and evaluated. In particular, chemical recycling enables achievement of the monomers that are used in PET resin manufacture: ethylene glycol (EG) and terephthalic acid (PTA). Therefore, studies for this process optimization are important from environmental and economic points of view. The present study investigated certain parameters that influence the depolymerization reaction of PET post-consumer via alkaline hydrolysis in order to obtain PTA. Assays were performed at 70 °C by varying the concentration of sodium hydroxide and the reaction time. The best results were obtained at 10.82 mol L{sup -1} NaOH and 9 h reaction time. Consequently, it was possible to prove this process viability, once analyses by infrared and nuclear magnetic resonance confirmed that PTA was obtained in all reactions performed. (author)

INTEGRATION OF IMAGE-DERIVED AND POS-DERIVED FEATURES FOR IMAGE BLUR DETECTION

Directory of Open Access Journals (Sweden)

T.-A. Teo

2016-06-01

Full Text Available The image quality plays an important role for Unmanned Aerial Vehicle (UAV’s applications. The small fixed wings UAV is suffering from the image blur due to the crosswind and the turbulence. Position and Orientation System (POS, which provides the position and orientation information, is installed onto an UAV to enable acquisition of UAV trajectory. It can be used to calculate the positional and angular velocities when the camera shutter is open. This study proposes a POS-assisted method to detect the blur image. The major steps include feature extraction, blur image detection and verification. In feature extraction, this study extracts different features from images and POS. The image-derived features include mean and standard deviation of image gradient. For POS-derived features, we modify the traditional degree-of-linear-blur (blinear method to degree-of-motion-blur (bmotion based on the collinear condition equations and POS parameters. Besides, POS parameters such as positional and angular velocities are also adopted as POS-derived features. In blur detection, this study uses Support Vector Machines (SVM classifier and extracted features (i.e. image information, POS data, blinear and bmotion to separate blur and sharp UAV images. The experiment utilizes SenseFly eBee UAV system. The number of image is 129. In blur image detection, we use the proposed degree-of-motion-blur and other image features to classify the blur image and sharp images. The classification result shows that the overall accuracy using image features is only 56%. The integration of image-derived and POS-derived features have improved the overall accuracy from 56% to 76% in blur detection. Besides, this study indicates that the performance of the proposed degree-of-motion-blur is better than the traditional degree-of-linear-blur.

PRS and POS/PRS coupling experiments on Hawk

Energy Technology Data Exchange (ETDEWEB)

Peterson, G G; Apruzese, J P; Commisso, R J [Naval Research Laboratory, Washington, DC (United States). Plasma Physics Div.; and others

1997-12-31

Experiments are being conducted on Hawk to investigate the electrical coupling of a plasma opening switch (POS) to a neon plasma radiation source (PRS) and to evaluate the K SHELL x-ray yield scaling of implosions with different initial radii, mass, and implosion times. Understanding the coupling and scaling is important for optimizing the performance of more powerful inductive-storage generators that rely on POS technology. (author). 1 tab., 5 figs., 7 refs.

DISFEMIA DALAM BERITA UTAMA SURAT KABAR POS KOTA DAN RADAR BOGOR

OpenAIRE

Pratiwi, Kania; Ridwan, Sakura; Rahmawati, Aulia

2016-01-01

Abstrak. Penelitian ini bertujuan memahami secara mendalam penggunaan bentuk dan nilai rasa disfemia pada berita utama surat kabar Pos Kota dan Radar Bogor. Metode yang digunakan dalam penelitian ini adalah metode deskriptif kualitatif dengan teknik analisis isi. Hasil penelitian yang diperoleh dari surat kabar Pos Kota dan Radar Bogor ditemukan 245 data. Sebanyak 155 data atau 63,26% ditemukan pada surat kabar Pos Kota dan 90 data atau 36,73% ditemukan pada surat kabar Radar Bogor. Disfemia ...

Etileno e peróxido de hidrogênio na formação de aerênquima em milho tolerante a alagamento intermitente

Directory of Open Access Journals (Sweden)

Marinês Ferreira Pires

2015-09-01

Full Text Available Resumo:O objetivo deste trabalho foi avaliar o papel do etileno e do peróxido de hidrogênio (H2O2 na formação do aerênquima em ciclos de seleção genética da cultivar de milho BRS 4154, sob alagamento. Plantas dos ciclos C1 e C18 foram submetidas a alagamento por 7 dias, com coleta das raízes aos 0 (controle, sem alagamento, 1 e 7 dias. Foram analisados: a expressão gênica das enzimas ACC sintase (ACS, ACC oxidase (ACO, dismutase do superóxido (SOD e peroxidase do ascorbato (APX; a produção de etileno e o conteúdo de H2O2; a atividade da enzima ACO; e a proporção de aerênquima no córtex. Não houve expressão de ACS e ACO. Houve variação na atividade de ACO e na produção de etileno. A expressão da SOD foi maior em plantas C1 e a da APX, em C18, com redução aos 7 dias. O conteúdo de H2O2 não diferiu entre os tratamentos. A proporção de aerênquima aumentou com o tempo, tendo sido maior em plantas C18 e relacionada à taxa de formação do aerênquima. O tempo de alagamento e o nível de tolerância do ciclo de seleção influenciam a produção do etileno. A expressão da APX indica maior produção de H2O2 no início do alagamento.

PosQ: Unsupervised Fingerprinting and Visualization of GPS Positioning Quality

DEFF Research Database (Denmark)

Kjærgaard, Mikkel Baun; Weckemann, Kay

. This paper proposes PosQ, a system for unsupervised fingerprinting and visualization of GPS positioning quality. PosQ provides quality maps to position-based applications and visual overlays to users and managers to reveal the positioning quality in a local environment. The system reveals the quality both...

Respiração e produção de etileno em beterrabas inteiras e minimamente processadas submetidas a tratamentos com etileno e biorreguladores Respiratory rate and ethylene production of whole and minimally processed beet roots submitted to ethylene and bioregulators treatments

Directory of Open Access Journals (Sweden)

Ricardo Alfredo Kluge

2010-03-01

Full Text Available Verificou-se o efeito do etileno e de biorreguladores sobre a atividade respiratória e a síntese de etileno em beterrabas minimamente processadas e inteiras. Para o processamento mínimo, as raízes foram selecionadas quanto à firmeza, cor e tamanho, descascadas, sanificadas, sendo em seguida cortadas em fatias (2 mm de espessura, enxaguadas e centrifugadas. Os tratamentos aplicados foram: etileno (1000 µL L-1, 1-metilciclopropeno (300 nL L-1 e ácido salicílico (500 mg L-1. Após os tratamentos, as beterrabas foram embaladas e armazenadas a 5±1ºC e 85±5% UR durante 10 dias. Observou-se que o ácido salicílico promoveu a diminuição da atividade respiratória do produto minimamente processado durante o armazenamento. Além disso, verificou-se que a resposta fisiológica de beterraba minimamente processada é diferente de beterraba inteira, o que foi comprovada ao se analisar a atividade respiratória e a produção de etileno, que foram significativamente maiores no produto minimamente processado.The objective of this work was to evaluate the effects of ethylene and bioregulators on the respiratory activity and ethylene synthesis of minimally processed and whole beet roots. For the minimal processing, beet roots were graded for firmness, color and size, and were peeled. Roots were then sanitized, shredded (2 mm thick, rinsed and centrifuged. The following treatments were applied: ethylene (1000 µL L-1, 1-methylciclopropene (300 nL L-1 and salicylic acid (500 mg L-1. After treatments, beet roots were packed and stored at 5±1 ºC and 85±5% RH during 10 days. It was observed that salicylic acid use promoted the decrease of respiratory rates of minimally processed beet roots during all storage time. It was also noted difference between whole and minimally processed beet roots physiology. This difference was observed by the high values of respiratory activity and ethylene production rates in the minimally processed beet roots.

PerPos: A Platform Providing Cloud Services for Pervasive Positioning

DEFF Research Database (Denmark)

Blunck, Henrik; Godsk, Torben; Grønbæk, Kaj

2010-01-01

-based building model manager that allows users to manage building models stored in the PerPos cloud for annotation, logging, and navigation purposes. A core service in the PerPos platform is sensor fusion for positioning that makes it seamless and efficient to combine a rich set of position sensors to obtain...

Global Evidence on the Association between POS Advertising Bans and Youth Smoking Participation.

Science.gov (United States)

Shang, Ce; Huang, Jidong; Cheng, Kai-Wen; Li, Qing; Chaloupka, Frank J

2016-03-09

Point-of-sale (POS) tobacco advertising has been linked to youth smoking susceptibility and experimental smoking. However, there is limited evidence of the association between POS advertising bans and youth smoking participation. This study aims to examine how such bans are associated with current smoking, daily smoking, and regular smoking (≥ 1 cigarettes per day) participation among youth. one to two waves (primarily one wave) of the Global Youth Tobacco Survey were conducted in 130 countries between 2007 and 2011. These surveys were linked to the WHO "MPOWER" data using country and year identifiers to analyze the association between POS advertising bans (a dichotomous measure of the existence of such bans) and smoking participation in the past month. Weighted logistic regressions were employed to analyze this association while controlling for age, gender, parents' smoking status, 6 MPOWER policy scores, and GDP per capita. We find that in countries with POS advertising bans, current smoking (OR = 0.73, p ≤ 0.1), daily smoking (OR = 0.70, p ≤ 0.1), and regular smoking (OR = 0.75, p ≤ 0.05) participation in the past month is significantly lower, suggesting that POS promotion bans can potentially reduce youth smoking. This study provides evidence to support the implementation of POS promotion regulations by the US FDA and implementation of the WHO FCTC guidelines regarding restrictions on tobacco POS promotion.

Manejo do etileno em ameixas 'Laetitia' armazenadas sob atmosferas controlada e modificada ativa

Directory of Open Access Journals (Sweden)

Thais Roseli Corrêa

2011-09-01

Full Text Available O objetivo deste trabalho foi avaliar o efeito de condições de atmosfera controlada (AC e atmosfera modificada (AM ativa (filme PEBD de 40 µm, com duas perfurações de 1,0 mm de diâmetro, associadas ao manejo do etileno, sobre a manutenção da qualidade em ameixas 'Laetitia'. Os tratamentos avaliados consistiram no armazenamento refrigerado (60 dias a 0,5±0,1ºC em: atmosfera refrigerada (AR; 21,0 kPa O2 + <0,03 kPa CO2; AM; AM + baixo etileno (BE; AC; e AC + 1-MCP (1,0 µL L-1. As pressões parciais de O2 + CO2 (kPa foram de 1,0 + 1,0 e 2,5 + <0,1, em AC e AM, respectivamente. Os frutos armazenados em AC, independentemente do tratamento com 1-MCP, apresentaram retardo no amadurecimento, quando comparados aos frutos em AR. Contudo, os melhores resultados para a manutenção da textura da polpa e da acidez titulável foram obtidos em AC + 1-MCP. Os tratamentos não interferiram para a incidência de podridões, rachaduras e degenerescência da fruta. Frutos dos tratamentos AM + BE e AC + 1-MCP apresentaram menor escurecimento da polpa e maior aceitabilidade quanto à cor e ao sabor na análise sensorial em relação àqueles armazenados em AR.

Analisa Dan Perancangan Aplikasi Point Of Sale (POS Untuk Mendukung Manajemen Hubungan Pelanggan

Directory of Open Access Journals (Sweden)

Silvester Dian Handy Permana

2015-11-01

Full Text Available Abstrak Perkembangan dunia bisnis mendorong perusahaan untuk selalu berusaha meningkatkan kualitas produk dan pelayanan kepada konsumen. Layanan pembelian barang dapat dilakuan secara elektronik dan juga dapat dilakukan secara online atau electronic commerce. Penerapan solusi bisnis tersebut merupakan komitmen dalam meningkatkan keunggulan kompetitif pelanggan korporatnya dalam hal efisiensi, efektivitas, kinerja, serta pengembangan bisnis. Adapun tujuan dari penelitian ini yaitu melakukan analisis dan perancangan aplikasi point of sale (POS untuk mendukung sistem layanan pembelian yang dapat membantu para pengusaha kecil dan menengah dalam pengelolaan data. Pembuatan aplikasi POS ini dimulai dari pengumpulan seluruh data-data yang dibutuhkan dengan menggunakan metode observasi dan wawancara, perancangan model aplikasi dengan pendekatan diagram berbasis obyek dengan alat bantu perancangan aplikasi berupa diagram alir / flowchart dan Unified Modeling Language (UML hingga diimplementasikannya aplikasi POS ini. Dengan diterapkannya aplikasi point of sales (POS ini dapat membantu tugas-tugas pihak-pihak terkait atau seluruh stake-holder yang berhubungan langsung dengan aplikasi POS ini. Kata kunci: Manajemen hubungan pelanggan, point of sales, electronic commerce, Unified Modeling Language Abstract The development of the business prompted the company to always strive to improve the quality of products and services to consumers. The service can purchase goods was done electronically and can also be done online or electronic commerce. Implementation of business solutions is a commitment to improve its corporate customers a competitive advantage in terms of efficiency, effectiveness, performance, and business development. The research purpose is to analyze and design the application point of sale (POS system to support the purchase of services that can help small and medium entrepreneurs in data management. The application point of sale (POS system

Nuclear norm regularized convolutional Max Pos@Top machine

KAUST Repository

Li, Qinfeng

2016-11-18

In this paper, we propose a novel classification model for the multiple instance data, which aims to maximize the number of positive instances ranked before the top-ranked negative instances. This method belongs to a recently emerged performance, named as Pos@Top. Our proposed classification model has a convolutional structure that is composed by four layers, i.e., the convolutional layer, the activation layer, the max-pooling layer and the full connection layer. In this paper, we propose an algorithm to learn the convolutional filters and the full connection weights to maximize the Pos@Top measure over the training set. Also, we try to minimize the rank of the filter matrix to explore the low-dimensional space of the instances in conjunction with the classification results. The rank minimization is conducted by the nuclear norm minimization of the filter matrix. In addition, we develop an iterative algorithm to solve the corresponding problem. We test our method on several benchmark datasets. The experimental results show the superiority of our method compared with other state-of-the-art Pos@Top maximization methods.

La piattaforma POS/LV di Applanix nelle applicazioni di laser scanner cinematico

OpenAIRE

Domenico Santarsiero

2008-01-01

The Applanix POS/LV platform in cinematic laser scanner applicationsOn the 11th of march the GEOmedia editorial unit had the pleasure of hosting a technical meeting dedicated to the Applanix LANDMark new Position and Orientation System for Land Vehicles (POS/LV)field test. The meeting, which is part of an italian tour organized by Louis Nastro (Applanix Director of Land Products) and Terenzio Mariani (Sales manager for Italy), helped to test the functionalities of a complete POS/LV system equ...

IceBridge POS/AV L1B Corrected Position and Attitude Data

Data.gov (United States)

National Aeronautics and Space Administration — The IceBridge POS/AV L1B Corrected Position and Attitude (IPAPP1B) data set contains georeferencing data from the Applanix 510 POS AV system flown with the Digital...

Accidentes y lesiones por consumo de alcohol y drogas en pacientes atendidos en una sala de urgencia Acidentes e lesões por consumo de álcool e drogas em pacientes atendidos em uma sala de urgência Accidents and injuries due to consumption of alcohol or drugs in patients treated at an emergency room

Directory of Open Access Journals (Sweden)

Nora Nelly Oliva Rodríguez

2010-06-01

Full Text Available Los propósitos del estudio fueron describir la diferencia del consumo de alcohol por género, escolaridad y ocupación y conocer el efecto de las características sociodemográficas sobre el consumo de alcohol, en 120 pacientes. Los resultados mostraron diferencias significativas por género (t=-3,570, pOs propósitos deste estudo foram descrever a diferença do consumo de álcool por sexo, escolaridade e ocupação e conhecer o efeito das características sociodemográficas sobre o consumo de álcool, em 120 pacientes. Os resultados mostraram diferenças significativas por sexo (t=-3.570; pThe aims of the study were to describe the differences in alcohol consumption by sex, education and occupation and to understand the effects of the socio-demographic characteristics on alcohol consumption, in 120 emergency room patients. The results showed significant differences for sex (t=-3.570, p <.01 and education (t=2.636, p <.01 in alcohol consumption. In addition the factors; age, age alcohol consumption started, quantity of alcohol ingested, age marijuana consumption started, and hours lapsed between the consumption of marijuana and the accident (F7, 116=15.519, p <.00, were also significant on the consumption of alcohol with an explained variance of 40%.

La piattaforma POS/LV di Applanix nelle applicazioni di laser scanner cinematico

Directory of Open Access Journals (Sweden)

Domenico Santarsiero

2008-03-01

Full Text Available The Applanix POS/LV platform in cinematic laser scanner applicationsOn the 11th of march the GEOmedia editorial unit had the pleasure of hosting a technical meeting dedicated to the Applanix LANDMark new Position and Orientation System for Land Vehicles (POS/LVfield test. The meeting, which is part of an italian tour organized by Louis Nastro (Applanix Director of Land Products and Terenzio Mariani (Sales manager for Italy, helped to test the functionalities of a complete POS/LV system equipped with a laser and an imaging acquisition software installed on board of a SUV.

SERIJSKA POVEZAVA POS TERMINALA INGENICO 5100 Z NAPRAVO ECR

OpenAIRE

Černenšek, Matjaž

2012-01-01

Diplomsko delo predstavlja korak naprej k poenostavitvi in pospešitvi izvajanja postopkov finančnih transakcij na prodajnem mestu z uporabo plačilnih kartic in POS terminala. Predstavljena in definirana je ideja fizične povezave dveh naprav, vključenih v ta proces. To sta blagajniška naprava ECR in POS terminal, ki ju z uporabo serijske povezave povežemo tako, da si izmenjujeta podatke za uspešno izvršitev finančne transakcije in druge ključne informacije. Podrobneje je opisana fizična izvedb...

The Process-Oriented Simulation (POS) model for common cause failures: recent progress

International Nuclear Information System (INIS)

Berg, H.P.; Goertz, R.; Schimetschka, E.; Kesten, J.

2006-01-01

A common-cause failure (CCF) model based on stochastic simulation has been developed to complement the established approaches and to overcome some of their shortcomings. Reflecting the models proximity to the CCF process it was called Process Oriented Simulation (POS) Model. In recent years, some progress has been made to render the POS model fit for practical applications comprising the development of parameter estimates and a number of test applications in areas where results were already available - especially from CCF benchmarks - and comparison can provide insights in strong and weak points of the different approaches. In this paper, a detailed description of the POS model is provided together with the approach to parameter estimation and representative test applications. It is concluded, that the POS model has a number of strengths - especially the feature to provide reasonable extrapolation to CCF groups with high degrees of redundancy - and thus a considerable potential to complement the insights obtained from existing modeling. (orig.)

Consumo de alcohol alcoholismo

OpenAIRE

Rodríguez Páez, Pablo E.; Fundación Valle de Lili

1999-01-01

¿Qué es el alcohol?/¿Cómo actual el alcohol en el organismo?/¿Qué efectos causa?/Efectos por el consumo crónico/¿El consumo de alcohol durante el embarazo afecta el embrión?/¿Qué otras consecuencias tiene el consumo de alcohol?/¿Cuándo se considera que una persona tiene problemas con su consumo de alcohol?/¿Cuándo se debe sospechar que alguien tiene problemas con el consumo de alcohol?/Características del saber beber adecuadamente?/¿Cuales son las alternativas de tratamiento para este problem...

IceBridge LVIS POS/AV L1B Corrected Position and Attitude Data

Data.gov (United States)

National Aeronautics and Space Administration — The IceBridge LVIS POS/AV L1B Corrected Position and Attitude Data (IPPLV1B) data set contains georeferencing data from the Applanix 510 and 610 POS AV systems flown...

Effect of Ethylene Inhibitors on Quality Attributes of Apricot cv. Modesto and Patterson during Storage Efecto de los Inhibidores de Etileno sobre Atributos de Calidad de Damascos, Variedades Modesto y Patterson durante Almacenamiento

Directory of Open Access Journals (Sweden)

Héctor Valdés

2009-06-01

Full Text Available Apricot (Prunus armeniaca L. fruit are highly susceptible to flesh softening, loss of flavor and fruit decay, particularly during postharvest storage. Most of these quality changes observed during fruit ripening are under ethylene regulation. We performed a study with the objective of determining the effect of 1-methylcyclopropene (1-MCP and aminoethoxyvinylglycine (AVG applications on quality attributes of Modesto and Patterson apricot cultivars. 1-MCP was applied at a rate of 1000 and 10 000 nL L-1 of SmartFresh™, and AVG at a rate 100 and 1000 mg L-1 of Retain®. Quality evaluations were performed after 20 and 30 days of cold storage and after a shelf-life period of 3-4 days at 20 °C. In general, both ethylene inhibitors were effective in reducing the ethylene production rate, especially in Patterson. Fruit softening and color development showed ethylene-dependent behavior, with significant reductions for both varieties in fruit treated with 1-MCP and AVG. On the other hand, soluble solids concentration and titratable acidity showed an ethylene-independent pattern, i.e. they were not affected by ethylene inhibitors applications. Among volatile compounds identified, esters and aldehydes showed ethylene-dependent behavior in both varieties. On the other hand, alcohols and terpenes were not affected by ethylene inhibition, suggesting ethylene-independent behavior.El damasco (Prunus armeniaca L. es muy susceptible al ablandamiento de la pulpa, pérdida de sabor y pudriciones, especialmente durante postcosecha. Muchos de estos cambios que ocurren durante maduración son regulados por etileno. El objetivo del presente trabajo fue determinar el cambio de la calidad de damascos var. Modesto y Patterson tratados con 1-metilciclopropeno (1-MCP y aminoetoxivinilglicina (AVG. Las dosis utilizadas fueron de 1000 y 10 000 nL L-1 de 1-MCP (SmartFresh™, 100 y 1000 mg L-1 de AVG (Retain® 15% p/p y su respectivo testigo. Las evaluaciones se realizaron

The Palliative Outcome Scale (POS) applied to clinical practice and research: an integrative review.

Science.gov (United States)

Rugno, Fernanda Capella; Carlo, Marysia Mara Rodrigues do Prado De

2016-08-15

to identify and evaluate the evidence found in the international scientific literature on the application of the Palliative Outcome Scale (POS) in clinical practice and research in Palliative Care (PC). integrative literature review, through the search of publications in journals indexed in PubMed / MEDLINE, LILACS, SciELO and CINAHL databases, between the years 1999 and 2014. the final sample consisted of 11 articles. In the data analysis, the articles were classified into 2 units of analysis (studies using the POS as a resource in research and studies using the POS in clinical practice), in which the information was presented in the form of sub-themes related to publications of the selected studies, highlighting the synthesis of the results. POS emerged as an important tool for measuring outcomes to assess the quality of life of patients and families, of the quality of care provided and the PC service organization. The international scientific literature on the application of POS proved to be relevant to the advancement and consolidation of the field of knowledge related to PC. identificar e avaliar as evidências encontradas na literatura científica internacional, referentes à aplicação da Palliative Outcome Scale (POS) na prática clínica e nas pesquisas em Cuidados Paliativos (CPs). revisão integrativa da literatura, por meio da busca de publicações nos periódicos indexados nas bases de dados PubMed/MEDLINE, LILACS, SciELO e CINAHL, entre os anos de 1999 e 2014. a amostra final do estudo constituiu-se de 11 artigos. Na análise dos dados, os artigos foram classificados em 2 unidades de análise (estudos que utilizam a POS como recurso na pesquisa e estudos que utilizam a POS na prática clínica), nas quais as informações foram apresentadas na forma de subtemas referentes às publicações dos estudos selecionados, com destaque para a síntese dos resultados. a POS se destacou como um importante instrumento de medidas de resultados para a avalia

POS-Tagging for informal language (study in Indonesian tweets)

Science.gov (United States)

Suryawati, Endang; Munandar, Devi; Riswantini, Dianadewi; Fatchuttamam Abka, Achmad; Arisal, Andria

2018-03-01

This paper evaluates Part-of-Speech Tagging for the formal Indonesian language can be used for the tagging process of Indonesian tweets. In this study, we add five additional tags which reflect to social media attributes to the existing original tagset. Automatic POS tagging process is done by stratified training process with 1000, 1600, and 1800 of annotated tweets. It shows that the process can achieve up to 66.36% accuracy. The experiment with original tagset gives slightly better accuracy (67.39%) than the experiment with five additional tags, but will lose important informations which given by the five additional tagset.POS-Tagging for Informal Language (Study in Indonesian Tweets).

Estrutura da cadeia reversa: "caminhos" e "descaminhos" da embalagem PET Structure of the reverse chain: "ways" of PET packing

Directory of Open Access Journals (Sweden)

Sylmara Lopes Francelino Gonçalves-Dias

2006-12-01

Full Text Available O trabalho propõe-se a discutir as possibilidades, limites e desafios da reciclagem de PET - Politereftalato de Etileno. Como fundamentação teórico-conceitual, recorre à discussão sobre a natureza e o alcance da logística reversa, analisando as estratégias para estruturação da cadeia de reciclagem. A pesquisa é de caráter exploratório, com adoção de diferentes estratégias para a coleta de dados, envolvendo fontes secundárias produzidas por órgãos públicos, instituições especializadas e mídia, e ainda entrevistas semi-estruturadas com especialistas na área. Os resultados apontam que múltiplos atores estão envolvidos na estrutura da cadeia reversa do PET e que, apesar do avanço no volume de reciclagem, nenhum dos setores, seja público ou privado, consegue individualmente organizar-se para o alcance da efetividade operacional e ambiental desejável no cenário brasileiro. O alcance de bons resultados depende, sobretudo, do investimento nos dois extremos da cadeia reversa: na coleta seletiva e no mercado para o produto reciclado.The work discuss the possibilities, limits and challenges of the recycling of PET packing in the Brazilian case. The authors analyze the nature and the function of the reverse logistics and its strategies for articulation of the recycling chain. The research is based in the exploratory methodological approach, with adoption of different strategies for the collection of data, involving secondary sources produced by public institutions, specialized organizations and media, and still, interviews semi-structured with specialists in the area. The results point that the Brazilian public and private sectors doesn’t get to organize this activity in the desirable environmental scale. Good performances in the PET packing reverse chain depends on investing in the selective collection and in the market for the recycled products.

El Fenómeno de Consumo y el Consumo en Marketing

Directory of Open Access Journals (Sweden)

Dagoberto Páramo Morales

2004-01-01

Full Text Available En este artículo se presentan las principales características que tipifican el fenómeno de consumo en las sociedades contemporáneas. Para lograrlo, primero se revisan algunas aproximaciones conceptuales del consumo, visto como fenómeno social, asociándolo con el simbolismo de consumo, los rituales, las posesiones y el materialismo como motores propulsores de la concepción y práctica del marketing de hoy.

Materiales carbonosos obtenidos a partir del reciclado de PET

Directory of Open Access Journals (Sweden)

Parra, J. B.

2004-04-01

Full Text Available Poly(ethyleneterephthalate, PET, is nowadays one of the polymers more widely used. However, due to its big production, it accounts for a large part of the wastes generated and it becomes necessary to minimise them. The PET incineration with energy recovery is the most common way to eliminate these residues. Further research is needed in order to find alternative processes to recycling PET. In this work, it is shown that the post-consumer PET is an interesting source of carbonaceous materials that develop a well controlled microporosity, giving the possibility of application in several fields.

El polietilentereftalato o tereftalato de polietileno, PET, es un poliéster termoplástico ampliamente utilizado. Debido a su gran producción y consumo se genera un gran volumen de PET usado que es necesario tratar. En la actualidad, la única alternativa utilizada para la minimización de residuos de PET de pureza media/baja es la incineración. Por lo tanto, se hace necesaria la búsqueda de otras opciones que aprovechen en mayor medida el potencial de este residuo y que, a la vez, sean rentables. En este trabajo se muestra cómo el PET proveniente de botellas usadas puede ser una fuente de materiales carbonosos que desarrollan una microporosidad controlada, por lo que su campo de aplicación puede ser muy amplio.

Tejido óseo y apósito biológico esterilizados con gas óxido de etileno Tesis presentada en opción al grado científico Doctor en Ciencias Médicas

OpenAIRE

Jacas Torné, Manuel

2014-01-01

Introducción: En Cuba tradicionalmente se ha empleado las radiaciones Gamma para esterilizar el tejido óseo y la piel porcina. Con el propósito de buscar una alternativa a su empleo se estudió el gas óxido de etileno (OtE), nunca antes empleado en Cuba con esos fines. Objetivo general: Evaluar la efectividad del gas óxido de etileno como método esterilizante del tejido óseo esponjoso y la piel porcina. Metodología de la investigación: Se realizó un estudio experimental In Vitro d...

A Nonlinear Multiparameters Temperature Error Modeling and Compensation of POS Applied in Airborne Remote Sensing System

Directory of Open Access Journals (Sweden)

Jianli Li

2014-01-01

Full Text Available The position and orientation system (POS is a key equipment for airborne remote sensing systems, which provides high-precision position, velocity, and attitude information for various imaging payloads. Temperature error is the main source that affects the precision of POS. Traditional temperature error model is single temperature parameter linear function, which is not sufficient for the higher accuracy requirement of POS. The traditional compensation method based on neural network faces great problem in the repeatability error under different temperature conditions. In order to improve the precision and generalization ability of the temperature error compensation for POS, a nonlinear multiparameters temperature error modeling and compensation method based on Bayesian regularization neural network was proposed. The temperature error of POS was analyzed and a nonlinear multiparameters model was established. Bayesian regularization method was used as the evaluation criterion, which further optimized the coefficients of the temperature error. The experimental results show that the proposed method can improve temperature environmental adaptability and precision. The developed POS had been successfully applied in airborne TSMFTIS remote sensing system for the first time, which improved the accuracy of the reconstructed spectrum by 47.99%.

Nuclear norm regularized convolutional Max Pos@Top machine

KAUST Repository

Li, Qinfeng; Zhou, Xiaofeng; Gu, Aihua; Li, Zonghua; Liang, Ru-Ze

2016-01-01

, named as Pos@Top. Our proposed classification model has a convolutional structure that is composed by four layers, i.e., the convolutional layer, the activation layer, the max-pooling layer and the full connection layer. In this paper, we propose

EDUCACIÓN PARA EL CONSUMO

Directory of Open Access Journals (Sweden)

J. L. Castillejo

2011-01-01

Full Text Available El consumo es un fenómeno de gran peso en la vida actual de los países desarrollados y también de los que están en vías de desarrollo, sinónimo de felicidad y de estatus personal. Por todo ello el consumo merece ser objeto de la educación. En la educación para el consumo resulta clave la implicación familia- escuela, puesto que los padres marcan las primeras pautas en este terreno, junto al contexto social y los medios de comunicación. La educación para el consumo implica información, capacidad de análisis crítica de las situaciones y sensibilidad respecto a las consecuencias del consumo desmedido, que pone en peligro la supervivencia misma del planeta. El consumo se enfrenta así con la escala de valores que la educación debe defender.

Pengaruh Budaya Organisasi Terhadap Komitmen Afektif Pada Karyawan PT. Pos Pusat Medan

OpenAIRE

Sanjaya, M. Ricky

2016-01-01

The pupose of this study was to look the influence of organizational culture on affective commitment among employees PT. Pos Pusat Medan. This study used quantitative approach. To collected data of organizational culture scale based on Robbins theory about organizational culture that contains 35 items and organizational commitment scale based on Meyer & Allen’s theory about affective commitment that contains 10 items. The samples of this study were 100 employess PT. Pos Pusat Medan. The da...

Etileno glicol na criopreservação de sêmen canino Ethylene glycol on canine semen cryopreservaton

Directory of Open Access Journals (Sweden)

Marcio Pereira Soares

2002-08-01

Full Text Available O objetivo deste trabalho foi avaliar a utilização do etileno glicol, adicionado ao meio Tris-gema, na criopreservação de sêmen canino, considerando os seus efeitos sobre a motilidade, o vigor e a morfologia espermática pré e pós-congelamento. Como doadores, utilizaram-se quatro cães da raça Pastor Alemão coletados por manipulação digital os quais no ejaculado apresentaram padrões mínimos de 90% de motilidade, cinco de vigor espermático (0 - 5 e no máximo 35% de defeitos morfológicos totais. As concentrações de etileno glicol testadas foram de 0, 25; 0,5 e 1,0M, sendo empregados como controle 0,8M de glicerol. Foram feitas cinco avaliações de motilidade e vigor, respectivamente, na obtenção da fração rica, depois da primeira diluição, ao atingir 4°C, após uma hora de estabilização a 4°C e no descongelamento. Avaliou-se a morfologia espermática em sêmen a fresco e após o descongelamento das amostras de cada tratamento. Não houve diferença na motilidade e na morfologia espermática dos grupos após o descongelamento. No vigor espermático pós- descongelamento, as concentrações de 0,25 e 0,5M de etileno glicol foram semelhantes entre si e com a concentração de 0,8M de glicerol (controle, mas diferiram da concentração de 1M, a qual apresentou vigor inferior ao controle. Conclui-se que, para a criopreservação de sêmen canino, o glicerol 0,8M pode ser substituído pelo etileno glicol nas concentrações de 0,25, 0,5 e 1,0M.The objective of the present work was to evaluate the efficiency of ethylene glycol on criopreservation of canine semen, considering its possible deleterious effects upon semen motility, vigor and morphology at the pre and post freezing stages, using a tris-egg yolk extender. Four adult german shepards were used as donors. Samples were obtained by digital manipulation, and only ejaculates presenting a minimum of 90% motility and 5 (0-5 vigor and no more than 35% of total morphological

Similar words analysis based on POS-CBOW language model

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Dongru RUAN

2015-10-01

Full Text Available Similar words analysis is one of the important aspects in the field of natural language processing, and it has important research and application values in text classification, machine translation and information recommendation. Focusing on the features of Sina Weibo's short text, this paper presents a language model named as POS-CBOW, which is a kind of continuous bag-of-words language model with the filtering layer and part-of-speech tagging layer. The proposed approach can adjust the word vectors' similarity according to the cosine similarity and the word vectors' part-of-speech metrics. It can also filter those similar words set on the base of the statistical analysis model. The experimental result shows that the similar words analysis algorithm based on the proposed POS-CBOW language model is better than that based on the traditional CBOW language model.

Acquisti, consumo ed emozioni

OpenAIRE

M. Addis; I. Soscia

2006-01-01

Il nuovo fenomeno del ‘marketing esperienziale’ Il concetto di esperienza di consumo Suscitare emozioni per arricchire l’esperienza e il suo valore Gli investimenti di marketing esperienziale per generare emozioni Le criticita’ dell’investimento nelle emozioni e nelle esperienze del consumo

Determinação da variação da viscosidade intrínseca do poli (tereftalato de etileno de embalagens Determination of intrinsic viscosity variation for polyethyelene terephthalate's bottles

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Sandro D. Mancini

2004-06-01

Full Text Available O mercado de embalagens de poli(tereftalato de etileno -PET- para acondicionamento de refrigerantes, água mineral, sucos concentrados e óleos comestíveis apresenta polímeros de diferentes tipos, que foram desenvolvidos para personalizar o atendimento a clientes desejosos de propriedades melhores e mais específicas, principalmente em termos de massa molar. No caso do PET, assim como na indústria da reciclagem do polímero, o ensaio de viscosidade intrínseca é muito usado para determinar a massa molar. Este trabalho apresenta os resultados de viscosidade intrínseca de PET advindo de embalagens de várias marcas de refrigerantes, sucos e óleos de soja. Amostras de cada embalagem foram dissolvidas em solução de fenol-tetracloroetano (60:40 em peso e o fluxo das mesmas em um viscosímetro Cannon-Fenske a 30 °C para medir a viscosidade relativa, que foi convertido para viscosidade intrínseca. Os resultados mostraram uma variação no valor da propriedade conforme se variava o volume, tipo e a marca do produto envasado. Para as 21 amostras analisadas, os resultados variaram de 0,70 a 0,79 dL/g. Portanto, uma melhor seleção das embalagens pode ajudar os recicladores na obtenção de produtos melhores, com menor variação na massa molar. Os valores de densidade obtidos apresentaram uma pequena variação, que torna-se maior quando transformados em cristalinidade.The market of polyethylene terephthalate (PET bottles presents polymers of different types, which have been developed in order to provide the client with products with improved properties, mainly in respect of molar mass. In the case of PET, as well as in the recycling industry of this polymer, the test of intrinsic viscosity is widely used to determine molar mass. This study presents the results of intrinsic viscosity and density for PET bottles of soft-drinks, juices and soy-bean oils. Samples of each bottle were dissolved in 60-40 phenol-tetrachloroethane solution and flowed

Analisis Pengaruh Strategi Bauran Pemasaran Terhadap Keputusan Konsumen Untuk Menggunakan Jasa Pos Di PT. Pos Indonesia (PERSERO) Cabang Pematangsiantar

OpenAIRE

Evadine, Rebecca

2011-01-01

The shipping service industries in Pematangsiantar do the same activities creating competition in getting their consumers. To maintain its existence, PT. Pos Indonesia (Limited Liability Company) Pematangsiantar Branch regards that the mix service marketing strategies are essential to be implemented in influencing consumer’s decision to use the postal service and stick with it. Consumer’s decision is influenced by the variables of mix marketing service strategies consisting of produc...

Armazenamento em atmosfera modificada e controlada de banana 'Prata' com absorção de etileno Modified and controlled atmosphere storage of 'Prata' banana with ethylene scrubbing

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Auri Brackmann

2006-10-01

Full Text Available Foram conduzidos dois experimentos com o objetivo de avaliar o efeito da absorção do etileno e de pressões parciais de O2 e CO2 sobre a qualidade da banana 'Prata'. Os tratamentos no experimento 1 foram: AR (armazenamento refrigerado; AR + AE (absorção de etileno; e AM (atmosfera modificada + AE. No experimento 2 os tratamentos foram: AR; AR + AE; AM + AE; 21,0 kPa O2 + 3,0 kPa CO2 + AE; 21,0 kPa O2 + 4,5 kPa CO2 + AE; 21,0 kPa O2 + 6,0 kPa CO2 + RA; 21,0 kPa O2 + 4,5 kPa CO2; e 2,0 kPa O2 + 4,5 kPa CO2 + AE. As temperaturas de armazenamento foram 25ºC e 12ºC para os experimentos 1 e 2, respectivamente. Para o armazenamento em atmosfera modificada foram utilizados filmes de polietileno de baixa densidade, com espessura de 16gama. No experimento 1, a absorção de etileno proporcionou frutos com maior firmeza de polpa e menor escurecimento da casca. A AM+AE proporcionou frutos com cor da epiderme mais verde. No experimento 2, verificou-se que todos tratamentos em atmosfera controlada com absorção de etileno apresentaram cor da casca mais verde e menor escurecimento da casca. A banana 'Prata' pode ser armazenada em atmosfera modificada durante 14 e 21 dias a 25ºC e 12ºC, respectivamente, e por 28 dias em atmosfera controlada a 12ºC, sempre com absorção do etileno.Two experiments were carried out with the objective to evaluate the effect of storage conditions and ethylene scrubbing on the quality of 'Prata' bananas. The treatments of experiment 1 were: cold storage (CS; CS + ES (ethylene scrubbing and MA (modified atmosphere + ES. In experiment 2 treatments were: CS; CS + ES; MA + ES; 21kPa O2 + 3kPa CO2 + ES; 21kPa O2 + 4.5kPa CO2 + ES; 21kPa O2 + 6kPa CO2 + ES; 21kPa O2 + 4.5kPa CO2; and 2kPa O2 + 4.5kPa CO2 + ES. The storage temperatures were 25ºC and 12ºC for the experiments 1 and 2, respectively. In experiment 1, ethylene scrubbing maintained higher flesh firmness and lower skin browning. MA+ES maintained greener peel color. In

Armazenamento de pêssego 'Chimarrita' em atmosfera controlada e sob absorção de etileno Storage of 'Chimarrita' peach in controlled atmosphere and under ethylene absorption

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Auri Brackmann

2003-06-01

Full Text Available Foram conduzidos dois experimentos com o objetivo de avaliar o efeito de duas formas de absorção de etileno e de condições de atmosfera controlada (AC sobre a qualidade do pêssego 'Chimarrita'. Os tratamentos do experimento 1 foram: testemunha com armazenamento refrigerado (AR; 1kPa de O2/3kPa de CO2; e 5kPa de O2/10kPa de CO2. No experimento 2, os mesmos tratamentos foram combinados com a absorção de etileno; absorção de etileno por filtro; e absorção de etileno por sache e sem absorção (testemunha. Tanto no experimento 1 como no experimento 2, os frutos foram armazenados na temperatura de -0,2ºC. As avaliações realizadas após 45 dias de armazenamento refrigerado + 2 dias em temperatura ambiente demonstraram que o uso de AC manteve os frutos com maior acidez titulável e reduziu a incidência de podridões e esporulação de fungos. Após os dois dias a 20ºC, os frutos armazenados em AC apresentaram-se mais firmes e com menor incidência de podridões e esporulação de patógenos. Os frutos mantidos na atmosfera de 5kPa de O2/10kPa de CO2 apresentaram maior incidência de lanosidade. No experimento 2, a absorção de etileno não foi eficiente na manutenção da qualidade do pêssego 'Chimarrita', mas após dois dias a 20ºC reduziu a incidência de podridões.Two experiments were carried out with the objective to evaluate the effects of two forms of ethylene absorption and controlled atmosphere (CA storage on the quality of 'Chimarrita' peaches. The treatments of the first experiment were: control (cold storage; 1kPa O2/3kPa CO2; e 5kPa O2/10kPa CO2. In the second experiment the same treatments were combined to ethylene absorption; either absorption using a filter or absorption using a sachet and no absorption at all. In both experiments, the fruits were stored at -0,2ºC for 45 days. At retrieval from storage, CA conditions maintained higher titratable acidity and reduced decay incidence and pathogen sporolution. After two

CONTROLE DA MATURAÇÃO PRÉ-COLHEITA DE MAÇÃS ‘ROYAL GALA’ PELA INIBIÇÃO DA AÇÃO OU SÍNTESE DO ETILENO

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ANDREIA MARIA TOMAZINI SCOLARO

2015-03-01

Full Text Available RESUMO O objetivo deste trabalho foi avaliar os efeitos da inibição da ação (pela pulverização de 1-metilciclopropeno em meio aquoso; 1-MCP e da síntese (pela pulverização de aminoetoxivinilglicina; AVG do etileno, sobre a maturação pré-colheita de maçãs. Macieiras ‘Royal Gala’ foram pulverizadas com 1-MCP (50 ou 100 mg L-1 em meio aquoso ou com AVG (124 mg L-1, sete e 28 dias antes do ponto de colheita comercial dos frutos, respectivamente. Macieiras não tratadas com 1-MCP nem com AVG foram usadas como testemunha. As maçãs foram colhidas semanalmente, durante cinco semanas, a partir do sétimo dia após a aplicação do 1-MCP, e analisadas quanto à maturação e qualidade, um dia após a colheita. Índices de maturação e qualidade das maçãs, na data em que os frutos atingiram firmeza de 71,1 N, foram estimados por análise de regressão, para cada tratamento. Os tratamentos 1-MCP (50 e 100 mg L-1 e AVG atrasaram a maturação das maçãs, diminuindo as taxas de produção de etileno, degradação do amido, perda de firmeza da polpa e da acidez, amarelecimento da epiderme, acúmulo de sólidos solúveis e desenvolvimento de cor vermelha. O tempo para os frutos atingirem firmeza de polpa de 71,1 N na planta foi retardado em 6 e 12 dias pelo 1-MCP (100 mg L-1 e AVG, respectivamente, em relação à testemunha. Maçãs tratadas com 1-MCP ou com AVG apresentaram índice de iodo-amido, produção de etileno e acidez semelhantes ou menores que maçãs testemunhas, nas datas em que os frutos de todos os tratamentos atingiram a mesma firmeza de 71,1 N. A magnitude do efeito do 1-MCP sobre a firmeza da polpa foi semelhante àquela sobre a produção de etileno e coloração da epiderme, mas sensivelmente menor que aquela sobre a degradação do amido.Os efeitos do AVG sobre a produção de etileno, coloração da epiderme e acidez foram maiores que aqueles sobre a redução da firmeza da polpa. Os resultados mostram que a

Doppler Centroid Estimation for Airborne SAR Supported by POS and DEM

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CHENG Chunquan

2015-05-01

Full Text Available It is difficult to estimate the Doppler frequency and modulating rate for airborne SAR by using traditional vector method due to instable flight and complex terrain. In this paper, it is qualitatively analyzed that the impacts of POS, DEM and their errors on airborne SAR Doppler parameters. Then an innovative vector method is presented based on the range-coplanarity equation to estimate the Doppler centroid taking the POS and DEM as auxiliary data. The effectiveness of the proposed method is validated and analyzed via the simulation experiments. The theoretical analysis and experimental results show that the method can be used to estimate the Doppler centroid with high accuracy even in the cases of high relief, instable flight, and large squint SAR.

The utility of PET/CT in staging and assessment of treatment response of naso pharyngeal cancer

International Nuclear Information System (INIS)

Law, Alastair; Peters, L.J.; Dutu, Gaelle; Rischin, Danny; Lau, Eddie; Drummond, Elizabeth; Corry, June

2011-01-01

Full text: The aim of this study was to evaluate the impact of positron emission tomography/computerised tomography (PET/CT) as an adjunct to conventional imaging (CI) in the management of nasopharyngeal cancer (NPC) both for initial staging and assessment of post-treatment response. Methods: All NPC cases referred to the Peter MacCallum Centre for Metabolic Imaging between January 2002 and December 2007 were identified, In patients undergoing initial staging, any differences between the pre PET/CT management plan based on CI and that following performance of the PET/CT scan were noted. Clinical impact was scored using the Centre's published criteria: 'high' if PET /CT changed the primary treatment modality or intent, 'medium' if treatment modality was unchanged but the radiotherapy technique or dose was altered, and 'low' if there was no change in treatment modality or intent. Patients undergoing PET/CT following definitive treatment were scored according to whether or not they achieved a complete metabolic response. Results: Forty-eight patients underwent a staging PET/CT. The clinical impact was high in 8%, medium in 25% and low in 66% of patients. Twenty-one patients were scanned for post-treatment response. PET/CT was less frequently equivocal than MRI (3 vs 8/21). A complete metabolic response on PET /CT was associated with a 93% negative predictive value for subsequent recurrence. Conclusion: PET /CT is a valuable staging tool for the detection of occult metastatic disease and defining the extent of neck nodal disease, Pos treatment, a complete metabolic response on PET /CT has a very high negative predictive value with fewer equivocal results than MRI.

DESARROLLO DE UN PROGRAMA PARA ESTUDIAR EL COMPORTAMIENTO DE UNA COLUMNA DE FRACCIONAMIENTO ETANO/ETILENO DE UNA PLANTA DE OLEFINAS

OpenAIRE

González, Patricia; Alciaturi, Carlos

2012-01-01

En este trabajo se presenta el desarrollo de programas para el estudio del comportamiento de una columna de fraccionamiento Etano/Etileno, perteneciente a una planta de Olefinas. Se utilizaron una red neuronal (RNA) del tipo multicapas con propagación hacia adelante y el algoritmo de mínimos cuadrados parciales (PLS) con este propósito. El entrenamiento de la red neuronal y la obtención del modelo PLS se realizaron con datos experimentales de la planta. Estos datos experimentales se dividiero...

Funciones sociales del consumo: un caso extremo

OpenAIRE

JOSÉ CASTILLO CASTILLO

1994-01-01

El consumo religioso de reliquías de santos durante la edad media cumple semejantes funciones sociales para su época que el consumo economico de objetos para la nuestra: El de reforzar real y simbólicamente las estructuras de prestigio, riqueza y poder de sus respectivas sociedades. El ámbito de la sociología del consumo no se circunscribe a los estrechos límites de las llamadas sociedades de consumo de masas. en el presente caso, el estudio del pasado ilumina procesos sociales propios de nue...

Funciones sociales del consumo: un caso extremo

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JOSÉ CASTILLO CASTILLO

1994-01-01

Full Text Available El consumo religioso de reliquías de santos durante la edad media cumple semejantes funciones sociales para su época que el consumo economico de objetos para la nuestra: El de reforzar real y simbólicamente las estructuras de prestigio, riqueza y poder de sus respectivas sociedades. El ámbito de la sociología del consumo no se circunscribe a los estrechos límites de las llamadas sociedades de consumo de masas. en el presente caso, el estudio del pasado ilumina procesos sociales propios de nuestros días.

A Glimpse into a State Technical College System's POS Pathways

Science.gov (United States)

Frazier, Stephanie D.; Swygert, N. Maria

2012-01-01

The South Carolina Technical College System (SCTCS) has embraced POS, providing students across the state with pathways into careers ranging from nuclear systems technology to health care to industrial technology. The SCTCS has strived, over the last 50 years, to foster a bridge between business and education. The colleges coordinate and…

ProtPOS: a python package for the prediction of protein preferred orientation on a surface.

Science.gov (United States)

Ngai, Jimmy C F; Mak, Pui-In; Siu, Shirley W I

2016-08-15

Atomistic molecular dynamics simulation is a promising technique to investigate the energetics and dynamics in the protein-surface adsorption process which is of high relevance to modern biotechnological applications. To increase the chance of success in simulating the adsorption process, favorable orientations of the protein at the surface must be determined. Here, we present ProtPOS which is a lightweight and easy-to-use python package that can predict low-energy protein orientations on a surface of interest. It combines a fast conformational sampling algorithm with the energy calculation of GROMACS. The advantage of ProtPOS is it allows users to select any force fields suitable for the system at hand and provide structural output readily available for further simulation studies. ProtPOS is freely available for academic and non-profit uses at http://cbbio.cis.umac.mo/software/protpos Supplementary data are available at Bioinformatics online. shirleysiu@umac.mo. © The Author 2016. Published by Oxford University Press.

Consumo cultural y educación

OpenAIRE

Bigott Suzzarini, Belkis V.

2007-01-01

El propósito fue sintetizar el estado del conocimiento acerca del consumo cultural, y establecer de forma teórica las posibles implicaciones educativas de este fenómeno. El consumo cultural es definido a partir del análisis de las conceptualizaciones de cultura y consumo cultural derivadas de los estudios de la Escuela Culturalista Latinoamericana. Se realizó una investigación documental asociada a la construcción teórica - conceptual que permitió generar como elementos conclusivos las catego...

CONSUMO DE DROGAS EN ADOLESCENTES ESCOLARIZADOS INFRACTORES

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José-María Faílde Garrido

2015-01-01

Full Text Available En las últimas décadas ha habido un interés creciente en la investigación acerca del consumo de drogas en los adolescentes. Sin embargo, es muy poco lo que conocemos sobre el consumo de sustancias en adolescentes infractores. Este estudio tiene como objetivo describir los patrones de consumo de drogas en adolescentes infractores de Galicia escolarizados en 4.º de Educación Secundaria Obligatoria (ESO y compararlos con los de estudiantes no infractores de su mismo nivel educativo y edad. La muestra total fue de 491 participantes, de los cuales 92 eran adolescentes infractores y 399 adolescentes no infractores. Los resultados indican diferencias estadísticamente significativas en el consumo de sustancia entre ambos grupos, siendo más elevado en los adolescentes infractores. Asimismo, se han detectado diferencias significativas en el porcentaje de policonsumidores, en el número de sustancias consumidas y en la edad de inicio de consumo de sustancias. En conclusión, los resultados ponen en evidencia la necesidad de intervenciones educativas dirigidas a prevenir el consumo de drogas en este colectivo.

In vitro identification and characterization of CD133(pos cancer stem-like cells in anaplastic thyroid carcinoma cell lines.

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Giovanni Zito

Full Text Available Recent publications suggest that neoplastic initiation and growth are dependent on a small subset of cells, termed cancer stem cells (CSCs. Anaplastic Thyroid Carcinoma (ATC is a very aggressive solid tumor with poor prognosis, characterized by high dedifferentiation. The existence of CSCs might account for the heterogeneity of ATC lesions. CD133 has been identified as a stem cell marker for normal and cancerous tissues, although its biological function remains unknown.ATC cell lines ARO, KAT-4, KAT-18 and FRO were analyzed for CD133 expression. Flow cytometry showed CD133(pos cells only in ARO and KAT-4 (64+/-9% and 57+/-12%, respectively. These data were confirmed by qRT-PCR and immunocytochemistry. ARO and KAT-4 were also positive for fetal marker oncofetal fibronectin and negative for thyrocyte-specific differentiating markers thyroglobulin, thyroperoxidase and sodium/iodide symporter. Sorted ARO/CD133(pos cells exhibited higher proliferation, self-renewal, colony-forming ability in comparison with ARO/CD133(neg. Furthermore, ARO/CD133(pos showed levels of thyroid transcription factor TTF-1 similar to the fetal thyroid cell line TAD-2, while the expression in ARO/CD133(neg was negligible. The expression of the stem cell marker OCT-4 detected by RT-PCR and flow cytometry was markedly higher in ARO/CD133(pos in comparison to ARO/CD133(neg cells. The stem cell markers c-KIT and THY-1 were negative. Sensitivity to chemotherapy agents was investigated, showing remarkable resistance to chemotherapy-induced apoptosis in ARO/CD133(pos when compared with ARO/CD133(neg cells.We describe CD133(pos cells in ATC cell lines. ARO/CD133(pos cells exhibit stem cell-like features--such as high proliferation, self-renewal ability, expression of OCT-4--and are characterized by higher resistance to chemotherapy. The simultaneous positivity for thyroid specific factor TTF-1 and onfFN suggest they might represent putative thyroid cancer stem-like cells. Our in

Produção de etileno em frutos de ameixeira ‘Prunus domestica’ sujeitos a duas temperaturas de conservação Ethylene production by ‘Prunus domestica’ plums during storage at two different temperatures

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A.E. Rato

2007-01-01

Full Text Available A síntese de etileno em frutos climatéricos tem sido bastante estudada pela influência que tem na conservação dos mesmos. Por esse motivo tem-se tentado através de alterações das condições ambientais, influenciar a produção de etileno. Em muitas espécies a exposição dos frutos ao frio favorece a síntese de etileno, quando estes são transferidos para a temperatura ambiente, também a actividade enzimática da ACC sintetase aumenta rapidamente nos frutos quando da sua passagem para a temperatura ambiente. Em algumas variedades de pêras e maçãs têm-se mesmo utilizado a exposição a baixas temperaturas apenas com o objectivo de conseguir uma maturação mais homogénea e uma textura aceitável. Relativamente à ameixeira Prunus domestica L. ‘Rainha Claudia Verde’ existe pouca informação acerca da expressão dos genes que controlam a maturação, mais concretamente das enzimas ACC sintetase e ACC oxidase. Durante a maturação da ameixa ‘Rainha Claudia Verde’ observa-se um aumento na produção de etileno e na taxa de respiração, paralelamente a um decréscimo da acidez e da firmeza dos frutos. No entanto, contrariamente à maioria das espécies fruteiras, nesta variedade observa-se uma diminuição na taxa de produção de etileno quando os frutos, sujeitos à conservação pelo frio, são posteriormente retirados para a temperatura ambiente. Este decréscimo é tanto mais acentuado quanto maior for o período de exposição ao frio. Esta variedade é habitualmente conservada entre os 0-2 ºC e apresentando um período de comercialização de 2 semanas após a colheita. Pretendeu-se com este trabalho perceber que tipo de efeito existe relativamente à produção de etileno nesta variedade. Estudou-se a influência de duas temperaturas de conservação, (1 ºC e 7 ºC ± 1 ºC, na produção de etileno. Os frutos foram sujeitos a diferentes períodos de conservação frigorífica: 0, 2, 5, 8 e 14 dias, ao fim dos

Consumo Voluntario de Forraje por Rumiantes en Pastoreo Consumo Voluntario de Forraje por Rumiantes en Pastoreo

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José Mejía Haro

2012-02-01

Full Text Available The variation in voluntary forage intake is undoubtedly the major dietary factor determining level and efficiency of ruminant production. This variation is bigger and least predictable for grazing ruminants. Range ruminant productivity and efficiency is relatively low due, partly, to intake limitations; productivity could probably be increased most by increasing intake. Distension of the reticulo-rumen wall is the primary intake regulation mechanism of low-quality roughages in range ruminants, digestibility and rate of ingest passage also affect voluntary intake. Body size and metabolic bodysize as well affect intake of grazing animals. Kind and amount of supplementation, forage availability, and grazing intensity have been related to voluntary forage intake. La variación en el consumo voluntario de forraje es indudablemente el principal factor dietario que determina el nivel y eficiencia de producción en un rumiante. Esta variación es mayor y muy difícil de predecir bajo condiciones de pastoreo. La productividad y eficiencia de rumiantes en pastoreo es relativamente baja debido, en parte, a las limitaciones en el consumo; la productividad probablemente se podrá incrementar si se incrementa el consumo. La distensión de la pared del rumenretículo es el principal mecanismo de regulación del consumo de forrajes de baja calidad en rumiantes en pastoreo, aunque la digestibilidad y la tasa de pasaje también afectan el consumo voluntario. Igualmente, el consumo se ve afectado por el tamaño corporal y peso metabólico del animal, por la cantidad y tipo de suplemento ofrecido, por la disponibilidad de forraje y por la intensidad del pastoreo.

Do institutions matter in neighbourhood commons governance? A two-stage relationship between diverse property-rights structure and residential public open space (POS quality: Kota Kinabalu and Penampang, Sabah, Malaysia

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Ling Gabriel Hoh Teck

2016-02-01

Full Text Available Despite the existing literature regarding institutional influence ontraditional commons, there is still a comparative dearth of research that theorisesproperty-rights structure and its impact on contemporary commons. This isparticularly true for public open space (POS governance: its management andutilisation and hence its quality, of which underinvestment and overexploitationleads to increasingly negative externalities and outcomes. An interdisciplinarystudy is employed here to depict the relationships of diverse property-rightsstructure attributes – POS title existence, community existence, POS title transfer and POS site handing-over period to local government – with quality ofresidential POS. A cross-sectional survey via direct structured observation witha POS quality audit tool was conducted to collect a randomly stratified sampleof 155 Country Lease (CL POS and entire 22 Native Title (NT POS, from thedistricts of Kota Kinabalu and Penampang, Sabah, respectively. Archival searchand document analysis on data of property-rights attributes were executed aswell. Next, 2-stage Pearson’s Chi-Square ( c2 and Lambda (λ with ProportionalReduction Error feature analyses were performed. Results showed that only thesethree property-rights attributes – title deed existence, community existence andPOS site handing-over period to local government- are significantly associatedwith POS quality at significance level (p≤0.05. It is found that, although POSwith title deed and community’s involvement might not contribute to goodquality, these attributes were likely to provide better quality. On the other hand,it is found that the more recent the POS site handing over to government, thehigher the likelihood of good POS quality and vice versa. Such empirical findingsprima facie infer that: (i current local property-rights structure does matter incontributing to POS condition, particularly the effective management right whichlikely leads to better

New vector/scalar Overhauser DNP magnetometers POS-4 for magnetic observatories and directional oil drilling support

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Sapunov V.A., Denisov A.Y., Saveliev D.V., Soloviev A.A., Khomutov S.Y., Borodin P.B., Narkhov E.D., Sergeev A.V., Shirokov A.N.

2016-12-01

Full Text Available This paper covers same results of the research directed at developing an absolute vector proton magnetometer POS-4 based on the switching bias magnetic fields methods. Due to the high absolute precision and stability magnetometer POS-4 found application not only for observatories and to directional drilling support of oi and gas well. Also we discuss the some basic errors of measurements and discuss the long-term experience in the testing of magnetic observatories ART and PARATUNKA.

ESTUDIO DE FACTIBILIDAD PARA LA MANUFACTURA DE EMPUÑADURAS DE PET RECICLADO

OpenAIRE

Mariana Juárez N; María E. Santiago J; Jesús Vera M

2011-01-01

Este artículo, expone los resultados obtenidos de la investigación realizada, para proponer una nueva reutilización viable del plástico, el cual, se usa en las botellas hechas de Polietilentereftalato (PET). Este plástico cuenta con gran potencial de reciclado. Sin embargo, forma parte de las miles de toneladas que son dispuestas a los rellenos sanitarios, generando entre otras problemáticas, la necesidad de generar mayores espacios para la gestión de desechos, además del consumo de materias ...

Towards Payment Systems for all: accessible POS

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Begoña Pino

2014-10-01

Full Text Available The project presented here is a first step towards building a more accessible world through Payment Systems and a successful implementation of a User Centred Design. By means of a beep-system, a Point of Sale (POS payment device informs the user of those transaction steps that require his/her attention at the moment of payment, such as when: the card has been successfully read, the Personal Identification Number (PIN must be entered, the transaction has been successfully processed and the transaction has not been completed due to an error. The proposed solution increases the personal autonomy and security of blind people when paying at a merchant.

Simmel y la cultura del consumo

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JOSÉ MIGUEL MARINAS

2000-01-01

Full Text Available Este artículo que se encuadra en una serie de trabajos sobre los orígenes de la cultura del consumo en el principio de siglo, presenta un recorrido por los textos simmelianos relativos a la constitución de la identidad social basada no en el paradigma de la producción , sino en la relación con los objetos y procesos del consumo.Antes de la pauta del consumo de masas surge y se generaliza un modo cultural basado en el lujo y su ostentación (consumo conspicuo, según Veblen y, en general de la mediación de las mercancías y su lógica (fetichismo como formadoras de los sujetos sociales . Los elementos críticos y creativos que Simmel elabora resultarán de una enorme fecundidad en autores como Kracauer y, sobre todo, Walter Benjamin. De esta herencia en el análisis de las metrópolis de los pasajes comerciales (Passagen Werk se da cuenta detallada en la segunda parte de este trabajo.

¿Tomar no tomar?: análisis de los motivos de consumo y no consumo de alcohol en jóvenes

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Ivonne Andrea Flórez

2013-01-01

Full Text Available El estudio analiza los motivos de consumo y no consumo en los adolescentes de un colegio de Chía. Se realizó un estudio cualitativo de análisis de contenido en donde se desarrolló una aproximación cualitativa por medio de preguntas abiertas; para posteriormente crear las categorías de análisis y cuantificar los resultados. La aplicación se llevó a cabo en una muestra de 282 adolescentes. Los resultados identifican las categorías y subcategorías de los motivos de consumo, las cuales muestran las diferentes temáticas y cuestiones que los jóvenes describen para argumentar el por qué consumir o no alcohol. La discusión resalta la importancia de generar programas preventivos que tengan en cuenta los motivos de consumo y no consumo de los jóvenes, que tengan en cuenta diferencias individuales en los estudiantes, que promueva los recursos personales como factores de protección y que desestimulen las asociaciones culturales del consumo de alcohol en los jóvenes.

Consumo y salud

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Miguel-C SÁNCHEZ-BARBUDO RUIZ-TAPIADOR

2009-11-01

Full Text Available RESUMEN: El tema «CONSUMO Y SALUD» está enfocado desde el punto de vista de la función importantísima del Profesor. Tiene como finalidad poner de manifiesto el marco dentro del cual el consumo es útil y beneficioso para la salud, tanto individual como colectiva. Al mismo tiempo, intenta orientar la acción educativa del Profesor para que, conjuntamente con su ejemplo, encauce el desarrollo de la personalidad del alumno y pueda éste integrarse en esta sociedad de consumo como ciudadano responsable, capaz de elegir libremente entre conductas positivas para la salud y rechace las conductas negativas.SUMMARY: The topic «CONSUMER SOCIETY AND HEALTH» is approached from the teacher's point of view, whose function in introducing this subject to the students is most important. The purpose is to show the framework within which consuming is useful and advantageous for both an individual and collective health. At the same time, the article intends to give directions to the teacher's educative task. The aim is for the teacher, helped by his exemplary behaviour, to guide students' personality development and on that account to help them to join consumer society in a responsible way and to enable them to both choose freely among positive consumer attitudes to their health and reject the negative ones.

EDUCACIÓN PARA EL CONSUMO: APROXIMACIÓN EMPÍRICA A LOS HÁBITOS DE CONSUMO DEL ALUMNADO DE SECUNDARIA

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Llarela Berríos Valenzuela

2015-01-01

Full Text Available Este artículo presenta los resultados de la investigación sobre los hábitos de consumo de los estudiantes de secundaria de la provincia de Barcelona, España. La investigación se sitúa en el paradigma cuantitativo, utilizando la metodología ex post facto descriptiva por encuesta, empleando un cuestionario como instrumento de recolección de datos. Debido al carácter diagnóstico y exploratorio, participaron de la muestra 232 estudiantes de 14-16 años, de institutos públicos de las comarcas del Maresme, Vallés Occidental y Barcelonés. Los principales resultados indican que los adolescentes tienen hábitos de consumo moderados, ya que no se consideran consumistas, perciben que influyen medianamente en el consumo familiar y aseguran que han recibido suficiente educación para el consumo responsable, pero lo interesante es que indican que les gustaría aprender más sobre este tipo de consumo. Sin embargo, señalan no tener conocimiento de organismos o entidades a los que se pueden dirigir en caso de reclamación. Se concluye que es necesario abordar la educación para el consumo a través de una propuesta pedagógica desde el ámbito de los valores, y es fundamental trabajar con el trinomio esencial de la educación (familia, escuela, adolescentes, para que contribuya de forma integral en la formación del alumnado de secundaria, a través del desarrollo de actitudes críticas y reflexivas frente a la sociedad de consumo en la que viven y, de este modo, estar preparados como ciudadanía activa y responsable, ante las problemáticas que nos afectan en el siglo XXI.

The research of a gyro-stabilized platform and POS application technology in airborne remote sensing

Science.gov (United States)

Xu, Jiang; Du, Qi

2009-07-01

The distortion of the collected images usually takes place since the attitude changes along with the flying aerocraft on airborne remote sensing. In order to get original images without distortion, it is necessary to use professional gyro-stabilized platform. In addition to this, another solution of correcting the original image distortion is to utilize later geometric rectification using position & orientation system ( POS ) data. The third way is to utilize medium-accuracy stabilized platform to control the distortion at a tolerant range, and then make use of the data obtained by high-solution posture measure system to correct the low-quality remote sensing images. The third way which takes advantage of both techniques is better than using only one of the two other ways. This paper introduces several kinds of structural forms of gyro-stabilized platforms, and POS acquiring instruments respectively. Then, the essay will make some analysis of their advantages and disadvantages, key technologies and the application experiment of the third method. After the analysis, the thesis discusses the design of the gyro-stabilized platform. The thesis provides crucial information not only for the application technology of gyro-stabilized platform and POS but also for future development.

Qualidade da maçã "Gala" armazenada em atmosfera controlada associada à absorção e ao controle da síntese e da ação do etileno Quality of 'Gala' apples stored in controlled atmosphere associated with ethylene absorption and control of its syntheses and action

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Auri Brackmann

2008-11-01

Full Text Available Este trabalho teve por objetivo avaliar o efeito da inibição da biossíntese de etileno no período pré-colheita e o efeito da inibição da ação ou da absorção do etileno durante o armazenamento em atmosfera controlada (AC; 1,2kPa de O2 + 2,5kPa de CO2 a 0°C sobre a qualidade de maçãs cv. "Gala". Além disso, avaliou-se também o efeito combinado desses tratamentos. Os tratamentos avaliados foram: (1 armazenamento em AC (controle; (2 aplicação pré-colheita de AVG; (3 AVG + aplicação pós-colheita de 1-MCP; (4 aplicação de 1-MCP; (5 AVG + absorção do etileno durante todo o período de armazenamento; e (6 absorção de etileno. Após oito meses de armazenamento mais sete dias a 20°C, os frutos tratados com AVG apresentaram menor atividade da ACC oxidase. A combinação de AVG + 1-MCP ou AVG + absorção de etileno mantiveram menor produção de etileno até cinco dias de vida de prateleira a 20°C. Além disso, a firmeza da polpa dos frutos submetidos a esses tratamentos combinados manteve-se mais elevada. A cor de fundo da epiderme manteve-se mais verde nos frutos tratados com AVG, independente do tratamento em pós-colheita, demonstrando que a modificação da coloração da epiderme é mais afetada pelo etileno produzido ainda na pré-colheita. Portanto, conclui-se que a aplicação em pré-colheita de AVG associada com a absorção do etileno durante o armazenamento é mais eficiente no controle da maturação de maçãs "Gala", no entanto, a aplicação pré-colheita de AVG combinada com a aplicação pós-colheita de 1-MCP também é eficiente.This research aimed to evaluate the effect of inhibition the ethylene biosynthesis at the pre-harvest stage, the ethylene action and the absorption from the controlled atmosphere storage room on the quality of 'Gala' apples. The experimental design was entirely randomized, with four replicates and the experimental unit composed by 25 fruits. The treatments were: (1 CA storage only

Consumo Simbólico de Artesanías // Symbolic Consumption of Crafts // Consumo Simbólico de Artesanato

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Jenny Amaya Tellez

2016-06-01

Full Text Available Este estudio aborda los factores asociados al consumo simbólico de artesanías –cerámica y cestería- de Ráquira y Guacamayas, objetos que fueron expuestos en Expoartesanías 2011, en la ciudad de Bogotá, y su relación con la construcción de la identidad nacional. La metodología empleada es cuantitativa bajo un estudio descriptivo multidimensional con base en los resultados de la encuesta, se realizó un análisis lexicométrico, de concordancias y representación gráfica. Los resultados permitieron identificar el perfil sociodemográfico, procesos de consumo y la construcción de identidad relacionada con el consumo simbólico de dichas artesanías. Además, y no menos importante fue el aporte teórico al concepto de consumo cultural desde sus contradicciones y posibilidades.

PROSPECÇÃO EM SIMULADOR DE ENERGIA ELÉTRICA

OpenAIRE

Ribeiro, Elisalvo Alves; Universidade Federal de Sergipe; Nunes, Maria Augusta Silveira Netto; Universidade Federal de Sergipe

2014-01-01

O processo de educar a população, em relação ao hábito de consumo consciente, é uma árdua tarefa, visto que as pessoas vivem em torno de aparatos tecnológicos que evoluem com uma velocidade nunca antes vivida pela humanidade, os quais oferecem mais comodidade, porém, em contrapartida incita-se a consumir mais energia. Assim, um dos meios de auxiliar as pessoas a terem um consumo consciente, é possibilitando-lhes mensurar seus consumos diários, através de um simulador de consumo, onde este pos...

Concepto de "relación de consumo"

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Juan Pablo Cajarville Peluffo

2014-07-01

Full Text Available Versión, corregida por el autor, de su exposición en las "2as. Jornadas Uruguayas de Derecho de Consumo", organizadas por la Directora de la Dirección Area Defensa del Consumidor de la Dirección General de Comercio. Prof. Esc. Beatriz Ramos, los días 19 y 20 de noviembre de 2001, en el Paraninfo de la Universidad de la República.El "Derecho del consumo", constituya o no una nueva rama del derecho, supone sin duda alguna la confluencia de problemas, principios y soluciones considerados hasta el presente por distintas ramas especializadas de la ciencia jurídica. (...Contenido: Introducción. Concepto legal de "consumidor", "proveedor" y "relación de consumo". Cometidos de las entidades estatales y "relaciones de consumo". Anexo: Ley 17.250 de 11 de agosto de 2000 (texto parcial

JURNALISME BENCANA DALAM PEMBERITAAN KECELAKAAN AIRASIA QZ8501 PADA SURAT KABAR JAWA POS DAN KOMPAS

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Finsensius Yuli Purnama

2016-05-01

Full Text Available Disaster has always been one of the topics of media attention. There are many sensitive issues that encourage the emergence of a special study in the field of journalism, related to disaster journalism. Disaster journalism in this research is intended as any journalism principle used by Jawa Pos and Kompas related to disaster. It contains two dimensions in disaster journalism that is process dimension and result dimension. This research focuses on the result dimension of AirAsia QZ8501 aircraft crash report that occurred on December 28, 2014. There are four principles that should be used by media in covering disaster: accuracy principle, humanist principle especially victim voice principle, commitment principle towards rehabilitation, and control and advocacy principle . By using content analysis method, the result of this research shows that the principle of disaster journalism applied by Jawa Pos is the principle of accuracy and humanist. While the principle of disaster journalism applied by Kompas is the principle of accuracy only.   Bencana selalu menjadi salah satu topik yang mendapat sorotan media. Terdapat banyak isu sensitif yang mendorong munculnya sebuah kajian khusus di bidang jurnalistik, terkait dengan jurnalisme bencana. Jurnalisme bencana dalam penelitian ini dimaksudkan sebagai prinsip jurnalisme apa saja yang digunakan oleh Jawa Pos dan Kompas terkait bencana. Terkandung dua dimensi dalam jurnalisme bencana yaitu dimensi proses dan dimensi hasil. Penelitian ini berfokus pada dimensi hasil yaitu berita kecelakaan pesawat AirAsia QZ8501 yang terjadi pada 28 Desember 2014. Terdapat empat prinsip yang harus digunakan media dalam meliput bencana: prinsip akurasi, prinsip humanis khususnya prinsip suara korban, prinsip komitmen menuju rehabilitasi, serta prinsip kontrol dan advokasi. Dengan menggunakan metode analisis isi, hasil penelitian ini menunjukkan bahwa prinsip jurnalisme bencana yang diterapkan Jawa Pos adalah prinsip

Consumo sustentável: limites e possibilidades de ambientalização e politização das práticas de consumo

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Fátima Portilho

Full Text Available O crescimento da percepção social do impacto ambiental do consumo e o surgimento de novas estratégias de política ambiental centradas na esfera do consumo são explicados através de um "deslocamento" discursivo da definição da crise ambiental. O presente trabalho analisa as promessas e armadilhas da estratégia de consumo verde e os limites e as possibilidades de mudar os atuais padrões de consumo através da estratégia política do consumo sustentável. O trabalho tem por objetivo discutir a seguinte questão: que possibilidades de fortalecer ou inibir a participação na esfera pública emergem com o deslocamento das políticas ambientais para a esfera do consumo? Ao contrário de reafirmar a alienação, a manipulação e a heteronomia dos consumidores ou, apressadamente, enfatizar seu poder e sua liberdade de escolha, optamos por enfatizar uma vertente do diálogo da teoria social contemporânea que concebe a possibilidade de novas formas de ação política a partir da articulação das esferas pública e privada. Uma vez que as atividades de consumo operam na interseção entre vida pública e privada, o debate sobre meio ambiente e consumo pode envolver questões de ambas as esferas, recuperando as pontes entre elas.

Consumo de alcohol en estudiantes universitarios

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Merfi Raquel Montaño

2011-01-01

Full Text Available Abstract The aim of this research was to describe the level of alcohol consumption in university students. 336 students selected from a random stratified sampling took part in this cross-sectional study. AUDIT (Vera & Gantiva, in press instrument was applied to the entire sample and a survey to identify social and demographic variables. The results showed that 6% of students were abstainers, 52,1% have a low-risk drinking, and 38,1% high-risk drinking and 3,9% are likely to experience alcohol dependence. The research also showed more problematic consumption in student between 17 and 14 years old and in those upper strata and male. The results allowed the identification of university students population which should be directed prevention programs the consumption of alcohol. Resumen Este artículo da a conocer los resultados de una investigación cuyo objetivo fue describir el nivel de consumo de alcohol en estudiantes universitarios. Fue un estudio descriptivo transversal en el que participaron 336 estudiantes escogidos a través de un muestreo aleatorio estratificado. Se implementó el Cuestionario de Identificación de los Trastornos debidos al Consumo de Alcohol (AUDIT, (Vera & Gantiva, en prensa y una encuesta para identificar variables sociodemográficas. Los resultados mostraron que el 6% de los estudiantes son abstemios, el 52,1% presenta un consumo de bajo riesgo, el 38,1% un consumo de alto riesgo y el 3,9% tiene posibilidades de experimentar dependencia al alcohol. También se evidenció un mayor consumo problemático en estudiantes de 17 a 24 años de edad, en aquellos de estratos altos y del sexo masculino. Los resultados permitieron establecer una guía sobre las características de la población universitaria a la cual deben ir dirigidos los programas de prevención del consumo de alcohol.

Aspectos metodológicos en la medición del consumo de alcohol: la importancia de los patrones de consumo

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José L. Valencia Martín

2014-01-01

Full Text Available Medir correctamente el consumo de alcohol es fundamental para in vestigar de forma fiable sus efectos en salud. Sin embargo, esta estima ción resulta enormemente compleja, tanto por la diversidad de formas de consumo de alcohol existente como por la gran heterogeneidad en su cla sificación. Además, cada patrón de consumo de alcohol puede asociarse a efectos muy diferentes sobre la salud, por lo que no tenerlos en conside ración cuando estimamos la ingesta de alcohol puede ocultar o confundir su importancia en estos efectos. Todo ello dificulta las comparaciones en tre estudios y el establecimiento de asociaciones consistentes que permi tan comprender los verdaderos efectos del consumo de alcohol, tanto glo bales como específicos de cada patrón de bebida. Este trabajo revisa los principales métodos y fuentes de información disponibles en España para estimar los aspectos más relevantes del consumo de alcohol, así como las dificultades y problemas metodológicos más frecuentes en la medición y clasificación de cada uno de estos indicadores.

Reduced Seminal Concentration of CD45pos Cells after Follicle-Stimulating Hormone Treatment in Selected Patients with Idiopathic Oligoasthenoteratozoospermia

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Rosita A. Condorelli

2014-01-01

Full Text Available The present study evaluated the conventional sperm parameters and the seminal concentration of CD45pos cells (pan-leukocyte marker of infertile patients with idiopathic oligoasthenoteratozoospermia (OAT. The patients were arbitrarily divided into three groups treated with recombinant follicle-stimulating hormone FSH: α (Group A = 20 patients, recombinant FSH-β (Group B = 20 patients, and highly purified human FSH (Group C = 14 patients. All treated groups achieved a similar improvement of the main sperm parameters (density, progressive motility, and morphology, but only the increase in the percentage of spermatozoa with normal morphology was significant compared to the baseline in all three examined groups. Moreover, all groups had a significant reduction of the seminal concentration of CD45pos cells and of the percentage of immature germ cells. Before and after the treatment, the concentration of CD45pos cells showed a positive linear correlation with the percentage of immature germ cells and a negative correlation with the percentage of spermatozoa with regular morphology. These results demonstrate that treatment with FSH is effective in patients with idiopathic OAT and that there are no significant differences between the different preparations. The novelty of this study is in the significant reduction of the concentration of CD45pos cells observed after the treatment.

La piattaforma POS/LV di Applanix nelle applicazioni di laser scanner cinematico

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Domenico Santarsiero

2008-03-01

field test. The meeting, which is part of an italian tour organized by Louis Nastro (Applanix Director of Land Products and Terenzio Mariani (Sales manager for Italy, helped to test the functionalities of a complete POS/LV system equipped with a laser and an imaging acquisition software installed on board of a SUV.

La lancia di Peleo: vitalità di un tópos

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Susanna Bevilacqua

2013-12-01

Full Text Available Il tópos della ‘lancia di Peleo’ è mostrato nel suo percorso dalla Provenza all’Italia, da Bernart de Ventadorn al Dante dell’Inferno, passando per la poesia siciliana e per i poeti pre-stilnovisti: ritenuto essere uno dei più diffusi nell’esperienza lirica delle origini, esso è in realtà raramente utilizzato nella sua forma semanticamente più ricca (la lancia che ferisce con un colpo, e guarisce la ferita con un secondo colpo della stessa lancia, mentre è più spesso incrociato con quello del ‘dardo amoroso’.The essay traces the tópos of “Peleus’ spear” throughout the history of literature, from Provence to Italy, from Bernard de Ventadorn to Dante’s Inferno, through Sicilian poetry and pre-stilnovistic poets. While it is believed to be one of the most common tópoi of ancient poetry, it is only rarely used in its semantically richest form (a spear wounding with its first blow and healing with the second and is more often linked to the concept of a “love dart”.

Aspectos fundamentais na validação do monitor biológico para a esterilização por óxido de etileno

OpenAIRE

Terezinha de Jesus Andreoli Pinto

1991-01-01

Considerando a importância da garantia de esterilidade em produtos médico-hospitalares, e conhecendo a necessidade de controle do processo esterilizante por óxido de etileno através de vários parâmetros dentre eles pelo sensor biológico, este trabalho teve como objetivo a padronização de alguns aspectos importantes do monitor biológico. Esporos de Bacillus subtilis var. niger foram obtidos em meios sólido e líquido sintético de esporulação, assim como adquiridos no comércio nacional, como sus...

Atmosfera modificada e controle de etileno para bananas 'Prata-Anã' cultivadas na Amazônia Setentrional Brasileira Atmospheric modification and ethylene's control in posthaverst, for 'Prata-Anã' bananas cultivated in the Setentrional Brazilian Amazon

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Marcos André de Souza Prill

2012-12-01

Full Text Available O presente trabalho teve por objetivo avaliar o efeito da atmosfera modificada (AM pelo uso de embalagem plástica de polietileno de baixa densidade (PEBD, do vácuo e da adsorção de etileno, visando à manutenção da qualidade das bananas 'Prata-Anã' produzidas em Roraima. As análises foram realizadas em intervalos de 5 dias após a colheita, até 35 dias de armazenamento refrigerado (AR. Verificou-se que os frutos submetidos a embalagem de PEBD apresentaram as menores perdas de massa fresca quando comparados aos demais. Da mesma forma, os frutos embalados na presença do adsorvedor de etileno obtiveram a melhor manutenção na coloração da casca, atraso temporal, do pico climatérico, assim como o retardamento na degradação do amido, os menores incrementos de sólidos solúveis e acidez titulável, as menores concentrações de etileno nos interiores das embalagens e atraso temporal e a diminuição da atividade enzimática. Isso, possivelmente, proporcionou os maiores teores de pectina total e solúvel ao final do período experimental. A combinação do uso da embalagem de PEBD com o sachê de permanganato de potássio (KMnO4 resultou no retardamento do processo de maturação dos frutos de banana 'Prata-Anã', quando armazenada a 12 ºC. Pode-se atribuir esse efeito benéfico à presença do sachê na adsorção de etileno e, consequentemente, na ação do etileno no amadurecimento dos frutos, retardando a senescência das bananas 'Prata-Anã'.This present study aimed to evaluate the effect of modified atmosphere (MA by the use of plastic packaging for low density polyethylene (LDPE, the vacuum and the adsorption of ethylene, aiming the maintenance of the quality of bananas 'Prata Anã' cultived in Roraima.. Analyses were performed each 5 days after harvest, up to 35 days. It was verified that the fruit under LDPE bags showed the lowest losses of fresh weight when compared to the others. Likewise, as the fruits packed in the

El consumo de Cigarrillo en adolescentes Escolarizados De Santa Marta

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Guillermo A. Ceballos O.

2014-06-01

Full Text Available El consumo de cigarrillo es la principal causa de enfermedades que se puede prevenir.1 No obstante, un número significativo de adolescentes inicia y se mantiene en el consumo de cigarrillo.2 Los adolescentes, por lo general, consumen cigarrillo de manera ocasional; sin embargo, un número importante muestra un patrón de consumo diario.3 Algunas investigaciones sugieren que aquellas personas que fuman de manera ocasional muestran menores riesgos psicosociales que los fumadores diarios y mayor facilidad de abandono del consumo.  

Consumo de alcohol y contextos de desarrollo en la adolescencia

OpenAIRE

Rubio González, Antonia

2016-01-01

Los patrones de consumo de alcohol en España se han modificado en los últimos años, y aunque el consumo de alcohol per cápita ha ido descendiendo ligeramente en las últimas décadas, su prevalencia actual entre los adolescentes y las mujeres es alta. Se ha constatado que el consumo abusivo de alcohol en la adolescencia se asocia a numerosas consecuencias negativas, como la continuidad en su consumo y el de otras drogas en la adultez, los problemas académicos, las relaciones sexu...

Consumo alimentar e estresse em pacientes com síndrome coronariana aguda

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Evelise Helena Fadini Reis Brunori

2015-10-01

Full Text Available RESUMOObjetivo:Avaliar se o consumo alimentar de pacientes com síndrome coronariana aguda (SCA segue as recomendações nacionais e internacionais e se existe relação com níveis de estresseMétodo:Estudo transversal com 150 pacientes com SCA que foram entrevistados utilizando-se os Questionários de Frequência Alimentar e Escala de Estresse Percebido-10.Resultados:Consumo diário acima das recomendações: colesterol (92%, fi bras (42,7% e proteínas (68%; consumo abaixo das recomendações: potássio (88% e carboidratos (68,7%; consumo conforme recomendações: sódio (53,3% e lípides (53,3%. A maioria (54% com consumo alimentar inadequado era estressada ou altamente estressada. Houve associação estatisticamente signifi cante entre menor nível de estresse e maior consumo de fibras.Conclusão:Em pacientes com SCA, o consumo alimentar esteve fora do recomendado pelas diretrizes e o menor consumo de fibras ocorre concomitantemente com maior estresse. Esforços educativos podem instrumentalizar os pacientes na adequação do consumo alimentar e no controle do estresse.

Development of a Patient-Reported Palliative Care-Specific Health Classification System: The POS-E.

Science.gov (United States)

Dzingina, Mendwas; Higginson, Irene J; McCrone, Paul; Murtagh, Fliss E M

2017-06-01

Generic preference-based measures are commonly used to estimate quality-adjusted life-years (QALYs) to inform resource-allocation decisions. However, concerns have been raised that generic measures may be inappropriate in palliative care. Our objective was to derive a health-state classification system that is amenable to valuation from the ten-item Palliative Care Outcome Scale (POS), a widely used patient-reported outcome measure in palliative care. The dimensional structure of the original POS was assessed using factor analysis. Item performance was assessed, using Rasch analysis and psychometric criteria, to enable the selection of items that represent the dimensions covered by the POS. Data from six studies of patients receiving palliative care were combined (N = 1011) and randomly split into two halves for development and validation. Analysis was undertaken on the development data, and results were validated by repeating the analysis with the validation dataset. Following Rasch and factor analyses, a classification system of seven items was derived. Each item had two to three levels. Rasch threshold map helped identify a set of 14 plausible health states that can be used for the valuation of the instrument to derive a preference-based index. Combining factor analysis and Rasch analysis with psychometric criteria provides a valid method of constructing a classification system for a palliative care-specific preference-based measure. The next stage is to obtain preference weights so the measure can be used in economic evaluations in palliative care.

Produção de etileno e atividade da enzima ACCoxidase em frutos de maracujá-amarelo (Passiflora edulis f. flavicarpa Deg. Ethylene production and ACCoxidase activity in passion fruits (Passiflora edulis f. flavicarpa Deg.

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Larissa Macedo Winkler

2002-12-01

Full Text Available O maracujá-amarelo (Passiflora edulis f. flavicarpa Deg. é uma das principais espécies cultivadas do gênero Passiflora. Seus frutos são ricos em minerais, vitaminas e apresentam aroma e sabor agradáveis. O presente trabalho teve como objetivos determinar a produção de etileno e atividade enzimática da ACCoxidase (ACCO em maracujá-amarelo colhido em diferentes estádios de maturação. A determinação do estádio de maturação foi realizada com o auxílio de um colorímetro, que, por meio da radiação ultravioleta, estabeleceu valores absolutos da cor dos frutos de cada um dos grupos (I, II e III. A produção de etileno e a atividade da ACCoxidase foram realizadas por cromatografia gasosa. Os frutos do grupo I são predominantemente verdes, de acordo com os valores absolutos da cor obtidos. Os frutos do grupo II são predominantemente, coloridos, ou seja, em um estádio de maturação intermediário, e os frutos do grupo III, totalmente coloridos, apresentando-se, portanto, em início da senescência. Os frutos do grupo I apresentaram atividade da ACCO predominantemente mais elevada do que os frutos do grupo III, ocorrendo também o mesmo comportamento com a produção de etileno, com um valor médio de 7,25 nL. g-1. h-1, bem acima do nível máximo estabelecido para espécies classificadas como fracamente produtoras de etileno (0,5 nL. g-1. h-1. Assim, o maracujá-amarelo difere quanto à produção de etileno e atividade da enzima ACCO, de acordo com o estádio de maturação. A espécie foi considerada, em comparação com outras espécies, como produtora intermediária de etileno. A atividade enzimática da ACCO é mais elevada em frutos predominantemente verdes, mas ela é limitada e necessita de co-fatores enzimáticos para sua atividade máxima.Passion fruit (Passiflora edulis f. flavicarpa Deg. is one of the main cultivated species of Passiflora genus. Its fruits are rich in mineral salts and vitamins and to present

O consumo na vida digital

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Iuri Yudi Furukita Baptista

2016-02-01

Full Text Available O modelo de consumo não possui as mesmas características sempre: suas relações, motivações, formatos, espaços, interesses e atividades são construções sociais que se modificam atreladas ao cenário econômico, político e tecnológico. O presente trabalho repassa o surgimento da sociedade do consumidor para então conjecturar sobre as propriedades distintivas do consumo na vida digital. O que se defende ao final é que o consumidor já não se restringe ao papel de consumir.

IceBridge LVIS POS/AV L1B Corrected Position and Attitude Data, Version 1

Data.gov (United States)

National Aeronautics and Space Administration — This data set contains georeferencing data from the Applanix 510 and 610 POS AV systems flown with the Land, Vegetation, and Ice Sensor (LVIS) over Greenland,...

CONSUMO ENERGÉTICO PROVENIENTE DE ALIMENTOS ULTRAPROCESSADOS POR ADOLESCENTES

OpenAIRE

D’Avila, Helen Freitas; Kirsten, Vanessa Ramos

2017-01-01

RESUMO Objetivo: Avaliar o consumo proveniente dos alimentos ultraprocessados e fatores relacionados em adolescentes. Métodos: Estudo transversal com 784 adolescentes (de ambos os sexos e entre 12 a 19 anos) de escolas públicas e privadas do município de Palmeira das Missões, Brasil. O consumo alimentar foi registrado pelo questionário semiquantitativo de frequência de consumo de alimentos e convertido em energia (Kcal/dia). Os alimentos foram classificados em: minimamente processados, gr...

ESTUDIO DE FACTIBILIDAD PARA LA MANUFACTURA DE EMPUÑADURAS DE PET RECICLADO

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Mariana Juárez N

2011-01-01

Full Text Available Este artículo, expone los resultados obtenidos de la investigación realizada, para proponer una nueva reutilización viable del plástico, el cual, se usa en las botellas hechas de Polietilentereftalato (PET. Este plástico cuenta con gran potencial de reciclado. Sin embargo, forma parte de las miles de toneladas que son dispuestas a los rellenos sanitarios, generando entre otras problemáticas, la necesidad de generar mayores espacios para la gestión de desechos, además del consumo de materias primas vírgenes. En este sentido, materiales con las cualidades como las del PET pueden ser reaprovechadas por medio del reciclaje, este tiene tienes varias opciones, entre estas destaca el reciclaje mecánico. Este método presenta varias ventajas, una de las más importantes es que tiene un impacto menor en el ambiente. Por lo tanto es necesaria la búsqueda de la continuación del proceso de recuperación, hasta llegar al producto terminado. Uno de los métodos de transformación, que cuentan con un ciclo corto de proceso, es la extrusión, por la cual, es posible convertir las hojuelas de PET, a un artículo de uso común, como pueden ser las empuñaduras para escobas o mechudos. Todo esto mediante un estudio previo del material, es decir, con la revisión bibliográfica de trabajos anteriores y otros medios, se encontró que el PET permite ser utilizado en diversas aplicaciones, siempre y cuando, se lleve a cabo un control minucioso del proceso durante el extruido del PET. Por tanto, este trabajo implica el aprovechamiento del PET reciclado, que contribuye a la conciencia ambiental, además de los beneficios económicos inherentes.

HÁBITOS Y PREFERENCIAS DE CONSUMO. CONSUMO EN ESTUDIANTES UNIVERSITARIOS // CONSUMER HABITS AND PREFERENCES. CONSUMPTION IN UNIVERSITY STUDENTS // HÁBITOS DE CONSUMO E PREFERÊNCIAS. CONSUMO EM ESTUDANTES UNIVERSITÁRIOS

Directory of Open Access Journals (Sweden)

Héctor Fabio Ríos Hernández

2016-06-01

Full Text Available El artículo analiza el comportamiento de consumo en estudiantes universitarios. El fundamento conceptual es la teoría microeconómica del consumidor y elementos básicos de economía del comportamiento. Considerando la declaración sobre sus preferencias de consumo para doce grupos de bienes, se analiza la probabilidad de realizar un presupuesto mensual de gasto, teniendo en cuenta su rango de ingreso. Se concluye que el ingreso es factor fundamental en la elaboración de un presupuesto, teniendo en cuenta las preferencias por grupos de bienes. El grupo de bienes alimentos es muy importante para los estudiantes con ingreso hasta 2 millones, mientras que estudiantes con ingresos mayores presentan mayores preferencias por prendas de vestir, restaurantes y hoteles, y bienes y servicios diversos.

Universitarios analizan su consumo de alcohol y proponen

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Liliana Muñoz Ortega

2011-01-01

Full Text Available Abstract This article spread the proposal of university students about elements to design and implementation of alcohol prevention programs. Levels, situations and characteristics about alcohol consume was taking into account in 350 students in the daytime in a university in Bogota. The form general data, the CEAL and ISCA and focus groups were using. Consumption is high, and there are early indicators of intoxication, abuse and dependence. Situations associated with consumption are both unpleasant and pleasant emotions, the urge to consume, social pressure and pleasant times. It stand up programs implemented since the University Welfare that aimed at reducing consumption and responsible consumption using shocking activities under the responsibility of all stakeholders. Resumen Los resultados de investigación presentados en este artículo muestran la propuesta de universitarios de elementos para el diseño e implementación de programas de prevención al consumo de alcohol. Se partió de niveles, situaciones y características del consumo en 350 universitarios de la jornada diurna de una institución universitaria de Bogotá. Se utilizaron la ficha de datos generales, el CEAL y el ISCA y grupos focales. El consumo es alto, iniciado tempranamente; existen indicadores de intoxicación, abuso y dependencia. Las situaciones asociadas al consumo son las emociones tanto desagradables como agradables, la urgencia por consumir, la presión social y los momentos agradables. Se destacan programas preventivos implementados desde Bienestar Universitario orientados a la reducción del consumo y al consumo responsable a través de actividades impactantes bajo la responsabilidad de todos los actores implicados.

Impacto social del consumo abusivo de alcohol en el estado español. Consumo, coste y políticas

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Rosario Ivano Scandurra

2011-01-01

Full Text Available Aunque ha disminuido en las últimas décadas, el consumode alcohol en el Estado español sigue siendo elevado en comparación con el resto de países europeos. El patrón de consumomuestra una tendencia convergente con el patrón europeo, conuna disminución del consumo de vino y un aumento del de cerveza. Así mismo, la mortalidad relacionada con el consumo de alcohol también ha disminuido en los últimos veinte años, a pesar de seguir siendo una de las principales causas de muerte. Elcoste directo sanitario y el coste indirecto de las enfermedadestotal y parcialmente atribuibles al consumo de alcohol en elaño 2007 fue de 2.669,74 millones de euros. El régimen fiscalefectivo en el Estado español grava muy poco las bebidas alcohólicas, por lo que un aumento substancial de la misma, en lalínea de algunos países europeos, podría ser una opción a teneren cuenta para acelerar la disminución de la carga de morbimortalidad asociada al consumo de alcohol.

18-FDG-PET in pretherapeutical determination of extra medullary involvement prior to Re-188-antibody guided myeloablative therapy

International Nuclear Information System (INIS)

Hofmann, M.; Boerner, A.R.; Otto, D.; Knapp, W.H.; Hertenstein, B.

2002-01-01

Full text: In relapsed or refractory leukemia it is highly desirable to intensify the conditioning prior to allogenic bone mamarrow transplantation (BMT). Application of the 188-Re-labelled antibody BW 250/183 has proved to be feasible for internal radiation therapy of the bone marrow. Because the number of granulocytes (which express the CD66b antigen targeted) in extramedullary manifestations are usually low, the treatment of extramkedullary lesions will be not effective. This study deals with the pretherapeutical identification of patients with extramedullary involvement via 18-F-FDG-PET. 1-2 weeks prior scheduled 188-Re-therapy 12 patients underwent 18-F-FDG PET (dedicated PET scanner Siemens ECAT EXACT 47). Non physiological tracer accumulations were evaluated by means of SUV and consecutive morphological imaging (CT/MRI). 3 of 11 patients did show non physiological enrichment. 1 patient had enrichment in the upper mediastine, which was confirmed as extramedullary leukemia involvement by cytology. In CT scan these lesions had been identified as small lymphnodes (1-2 cm diameter). 2 Patients did show small lesions in the lung. In one patient they were confirmed to be active fungous infection (pos. sputum culture) and in the other patient they were regarded as regenerative residuals of previous known pneumonic infection not active now (neg. sputum cultures and neg. inflammation markers). 18-F-FDG PET is helpful of identifying extramedullary involvement and gives in addition information on the inflammatory status of patients prior to BMT. (author)

PENTINGNYA BINTEK (BIMBINGAN TEKNIS DALAM PENGEMBANGAN KARAKTERISTIK TENAGA PENGAJAR DI POS PAUD SEBAGAI PERWUJUDAN MUTU PENDIDIK PROFESIONAL

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Agung Prasetyo

2012-03-01

Full Text Available Abstract Technical assistance in developing a cadre post in early childhood Pudak Payung Banyumanik Semarang is an activity undertaken in order to provide insight into the implementation of early childhood in every RW Pos in order to realize the City/County Eligible Children. City/County deserve a child is the implementation of child rights in three areas, namely: profisi (meeting the needs of children of love, protection (children's rights in obtaining protection, and participation (involvement of children's rights in decision making. Third child rights will not be fulfilled properly, without a beginning and involving parents, teachers or early childhood educators. This activity aims to provide assistance for citizens in the realization of decent child starts from the family environment. The solutions offered are: (1 provide training and mentoring for teachers/teacher/early childhood in a cadre post bintek to achieve professionalism in the field of early childhood, (2 provide the skills for early childhood cadre post about active learning and creative developmentally appropriate early childhood, (3 provide training and skills in the construction of educational games based waste/scrap materials as a source of learning for AUD; (4 provide assistance in conducting the evaluation of early childhood education at the post, and (5 monitoring the implementation of sustainable results. Therefore, with this activity, is expected to citizens, parents, and children receive the same rights in accordance with the ideals that the realization of decent kids program. Key Words: Guidance, Lecturer, and Educator Quality ?é?á Abstrak Bimbingan Teknis dalam mengembangkan Kader Pos Paud di Pudak Payung Banyumanik Semarang adalah sebuah kegiatan yang dilakukan dalam rangka memberikan pemahaman tentang pelaksanaan Pos PAUD di setiap RW dalam rangka mewujudkan Kota/ Kabupaten Layak Anak. Kota/Kabupaten layak anak merupakan implementasi hak-hak anak dalam tiga bidang

Cultura e consumo: uma explicação teórica da estrutura e do movimento do significado cultural dos bens de consumo

OpenAIRE

McCracken, Grant

2007-01-01

Numa sociedade de consumo, o significado cultural se move incessantemente de um ponto para outro. Na trajetória normal, o significado cultural se move primeiro do mundo culturalmente constituído para os bens de consumo e desses para o consumidor individual. Diversos instrumentos são responsáveis por esse movimento: a publicidade, o sistema de moda e quatro rituais de consumo. Este artigo analisa o movimento do significado cultural do ponto de vista teórico, demonstrando onde reside o signifi ...

Elementos para una teoría sociológica del consumo

OpenAIRE

Callejo Gallego, Manuel Javier

1995-01-01

En las sociedades desarrolladas, la práctica del consumo ocupa el centro del proceso de reproducción social. Sin embargo, el consumo sigue aparcado en un lugar periférico en la teoria social. Mientras que, por otro lado, la teoria sociológica necesita reactualizarse en su proyección en campos concretos de prácticas. El presente trabajo se propone como un paso hacia tal teoria sociológica del consumo. Ahora bien, pensar el consumo requiere romper con tradicionales hipótesis, como la concepción...

Espacios de consumo populares: las ferias comerciales de indumentaria en Argentina

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Guillermo Nicolás Schiaffino

2015-12-01

Full Text Available En el periodo actual, la expansión del consumo en el territorio se materializa en las ciudades evidenciándose el avance y la instalación de diferentes espacios de consumo. Por un lado, espacios de consumo de grandes capitales del circuito superior como son los shopping center, supermercados e hipermercados y por otro lado, espacios de consumo populares como las ferias comerciales de indumentaria y accesorios, denominadas muchas veces shopping populares, con características distintivas del circuito inferior de la economía urbana (Santos, 1979. En este sentido, se observa que cada vez más las variables distintivas del período como son la técnica, la información, la publicidad, las finanzas, el crédito, entre otras, se hacen presentes en este tipo de actividades. Proponemos en este artículo reflexionar sobre la importancia de estas variables haciendo énfasis en el consumo y en los diversos espacios comerciales. Se presentan brevemente las características del periodo actual y la centralidad del consumo. Luego, se profundiza sobre los espacios de consumo populares como son las ferias comerciales de indumentaria en Argentina para finalmente explicar sintéticamente el caso de la mega- feria “La Salada”.

El lado oculto del consumo

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Susana Narotzky

2007-12-01

Full Text Available El aprovisionamiento de recursos es un proceso complejo en el que deben considerarse conjuntamente relaciones de producción, distribución, apropiación y consumo, y en el que el desarrollo histórico va a definir en cada caso las vías particulares de aprovisionamiento de bienes y servicios que están disponibles en sociedades concretas, para grupos concretos y para actores concretos dentro de esas sociedades. Desde una perspectiva que observa los "modos de aprovisionamiento" en su diversidad, el trabajo se aproxima a las formas no mercantiles de obtención y transferencia de recursos y no sólo al consumo encuadrado en dinámicas de mercado.O aprovisionamento de recursos e um processo complexo em o que e necessário considerar conjuntamente relaciones de produção, distribuição, apropriação e consumo, onde o desenvolvimento histórico vá definir em cada caso as vias particulares de aprovisionamento de bens e serviços disponibles em sociedades concretas, para grupos concretos y para atores concretos em essas sociedades. Desde uma perspectiva que observa os "modos de aprovisionamento" em sua diversidade, este trabalho se aproxima as formas no mercantil de obtenção y transferência de recursos y no solo al consumo enquadrado em dinâmicas de mercado.The purchasing resources is a complex process and need to consider together production, distribution, appropriation and consume relations, and en the historical development will define in each case the goods and services purchasing especial ways available in specific societies, for specific groups y for specific actors into this societies. Observing the "purchasing modes" in them diversity, this article analyze the no mercantile forms the obtaining and transference the resources, and no only to the mercantile consume.

Educación para el consumo: aproximación empírica a los hábitos de consumo del alumnado de sencundaria

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Berríos Valenzuela, Llarela

2015-01-01

Full Text Available Este artículo presenta los resultados de la investigación sobre los hábitos de consumo de los estudiantes de secundaria de la provincia de Barcelona, España. La investigación se sitúa en el paradigma cuantitativo, utilizando la metodología ex post facto descriptiva por encuesta, empleando un cuestionario como instrumento de recolección de datos. Debido al carácter diagnóstico y exploratorio, participaron de la muestra 232 estudiantes de 14-16 años, de institutos públicos de las comarcas del Maresme, Vallés Occidental y Barcelonés. Los principales resultados indican que los adolescentes tienen hábitos de consumo moderados, ya que no se consideran consumistas, perciben que influyen medianamente en el consumo familiar y aseguran que han recibido suficiente educación para el consumo responsable, pero lo interesante es que indican que les gustaría aprender más sobre este tipo de consumo. Sin embargo, señalan no tener conocimiento de organismos o entidades a los que se pueden dirigir en caso de reclamación. Se concluye que es necesario abordar la educación para el consumo a través de una propuesta pedagógica desde el ámbito de los valores, y es fundamental trabajar con el trinomio esencial de la educación (familia, escuela, adolescentes, para que contribuya de forma integral en la formación del alumnado de secundaria, a través del desarrollo de actitudes críticas y reflexivas frente a la sociedad de consumo en la que viven y, de este modo, estar preparados como ciudadanía activa y responsable, ante las problemáticas que nos afectan en el siglo XXI.

Consumo Adolescente: Construindo a Identidade de Jovens Brasileiras.

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Andrya Verena Silva Rosa de Carvalho

2017-03-01

Full Text Available O estudo objetiva compreender a construção da identidade em brasileiras de 12 a 17 anos tomando como pressuposto a influência do consumo sob tal fenômeno. A abordagem teórica retrata aspectos da identidade individual e coletiva e refere-se a cultura de consumo nos preceitos da Consumer Culture Theory – CCT, como disposta por Arnould & Thompson (2005, dentre outros estudos.  Com método qualitativo, a pesquisa utilizou-se da ferramenta Grupos de Foco em uma amostra de 33 informantes de classes sociais variadas, regionalizadas em 13 estados brasileiros e dentro da faixa etária determinada. O estudo identificou particularidades de consumo deste público, segmentando os resultados em três dimensões: Psicossocial, Comportamental e Cultural. Os principais influenciadores encontrados a partir dos depoimentos das informantes foram divididos em: Classe Social, Família, Grupos de Pares, Mídia e Instituições de Ensino como aspectos relevantes da cultura de consumo das adolescentes e consequentemente na construção de sua identidade.

A Hall-current model of electron loss after POS opening into high-impedance loads

International Nuclear Information System (INIS)

Greenly, J.B.

1989-01-01

The author discusses how a self-consistent relativistic model of laminar Hall (E x B) electron flow across a POS plasma allows a loss mechanism after opening even in a strongly magnetically-insulated line, downstream of the remaining POS plasma. Opening is assumed to occur at the cathode, either by erosion or push-back. The loss results only when a large voltage appears after opening into a high impedance load. Then the difference in potential between the plasma, which is near anode potential, and the cathode results in an axial component of E at the load end of the plasma, which supports an E x B drift of electrons across the gap. The analytic model predicts that this loss should increase with higher voltage after opening, and could be eliminated only by removing the plasma from the gap, or eliminating cathode electron emission (both difficult), or by confining this downstream electron flow with an applied magnetic field

Consumo de Alcohol en los Adolescentes de Chía y su Percepción del Consumo y de la Permisividad Parental frente al Uso de Sustancias

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Ángela M. Trujillo

2013-01-01

Full Text Available Este estudio tuvo como objetivo identificar las asociaciones entre el consumo de alcohol en adolescentes del municipio de Chía, Colombia, y la percepción que estos tienen del consumo de sustancias por parte de los padres y de la permisividad parental. Mediante un estudio correlacional se midieron las variables de interés a partir de una encuesta diseñada por los autores y aplicada a una muestra de 326 adolescentes. Los resultados mostraron una asociación positiva y significativa entre el consumo de alcohol en adolescentes y la percepción del consumo de los padres y de la permisividad parental. Se discute la importancia de generar programas preventivos que tengan presente las actitudes favorables de los padres hacia el consumo de alcohol en los adolescentes.

When POS datasets don’t add up: Combatting sample bias

DEFF Research Database (Denmark)

Hovy, Dirk; Plank, Barbara; Søgaard, Anders

2014-01-01

Several works in Natural Language Processing have recently looked into part-of-speech (POS) annotation of Twitter data and typically used their own data sets. Since conventions on Twitter change rapidly, models often show sample bias. Training on a combination of the existing data sets should help...... overcome this bias and produce more robust models than any trained on the individual corpora. Unfortunately, combining the existing corpora proves difficult: many of the corpora use proprietary tag sets that have little or no overlap. Even when mapped to a common tag set, the different corpora...

Por uma etnografia das práticas de consumo

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Valéria Brandini

2008-09-01

Full Text Available Este artigo sugere uma reflexão teórica acerca da etnografia como método para pesquisas de consumo e desenvolvimento de estratégias de produção de bens. O universo do consumo, e, em especial, do consumo de moda, representa hoje um sistema de produção de significações (como quer Jean Baudrillard e comportamentos gerados pela racionalidade econômica (como vemos em Pierre Bourdieu que são evidenciados por meio do mercado como processo ritual. Assim, a etnografia do consumo e a antropologia empresarial podem ser vistas como estratégia para empresas. Palavras-chave: Consumo; etnografia; comunicação. ABSTRACT This article suggests a theoretical reflection about ethnography as a method for research on consumption and the development of strategies of goods production. The universe of consumption, and, specially, fashion consumption, represents nowadays a system of significations (as said by Jean Baudrillard and behavior generated by the economic rationality (as we have seen in Pierre Bourdieu that are evidentiated by the market as a ritual process. So, ethnography of consumption, and anthropology of business can be seen as business strategies. Keywords: Consumption; ethnography; communication.

Razones para reducir el consumo de alcohol en universitarios

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Karina Conde

2017-12-01

Full Text Available Las razones para reducir el consumo de alcohol pueden ser definidas como motivos que llevan a una persona a disminuir el consumo de alcohol o mantener la sobriedad. Este tema suele ser poco estudiado, particularmente en países latinoamericanos y en poblaciones en riesgo. El objetivo de esta investigación de diseño secuencial exploratorio fue explorar las razones para cambiar el consumo de alcohol en universitarios que lo hayan modificado (N = 100, de la ciudad de Mar del Plata, Argentina, con una pregunta abierta. A su vez, la descripción se realizó sobre la base de la experiencia previa de consumo excesivo episódico del alcohol, trastornos por uso de alcohol, y el sexo de los participantes. Los resultados indican que el motivo más frecuente es el disgusto o indiferencia por la sustancia en casi todos los grupos considerados. Sin embargo, cuando el trastorno por uso de alcohol fue grave o moderado, se observaron diferencias. Se discuten los aportes teóricos de la investigación, entre ellos, comprender qué lleva a cada grupo a cambiar su consumo alcohol, y las implicancias para el desarrollo de intervenciones específicas basadas en esta información.

PADRÃO DE CONSUMO E PRESSÃO AMBIENTAL NO BRASIL

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Lucio Flávio da Silva Freitas

2014-04-01

Full Text Available Este artigo examina as conexões entre o consumo das famílias e a pressão ambiental no Brasil. O objetivo é investigar como o aumento do consumo das famílias brasileiras nas últimas duas décadas modificou a pressão ambiental do sistema econômico. A avaliação é feita a partir da decomposição estrutural de um modelo de insumo produto associado aos dados das Pesquisas de Orçamentos Familiares. Exclusive os efeitos da Mudança de Uso da Terra e Florestas, o nível de emissão continua subindo com o aumento da produção e do consumo. O efeito composição diminuiu as emissões do consumo, quase exclusivamente devido ao setor agropecuário. O efeito tecnológico também reduziu o conteúdo de gases do efeito estufa (GEE por unidade do PIB, entretanto, estas reduções foram superadas pelo efeito escala do consumo.

Quantificação de antimônio em garrafas de politereftalato de etileno (PET brasileiras por fluorescência de raios-X e avaliação quimiométrica para verificar a presença de pet reciclado através do teor de ferro

Directory of Open Access Journals (Sweden)

Gustavo G. Shimamoto

2011-01-01

Full Text Available Antimony is a common catalyst in the synthesis of polyethylene terephthalate used for food-grade bottles manufacturing. However, antimony residues in final products are transferred to juices, soft drinks or water. The literature reports mentions of toxicity associated to antimony. In this work, a green, fast and direct method to quantify antimony, sulfur, iron and copper, in PET bottles by X-ray fluorescence spectrometry is presented. 2.4 to 11 mg Sb kg-1 were found in 20 samples analyzed. The coupling of the multielemental technique to chemometric treatment provided also the possibility to classify PET samples between bottle-grade PET/recycled PET blends by Fe content.

Imaging and PET - PET/CT imaging

International Nuclear Information System (INIS)

Von Schulthess, G.K.; Hany, Th.F.

2008-01-01

PET/CT has grown because the lack of anatomic landmarks in PET makes 'hardware-fusion' to anatomic cross-sectional data extremely useful. Addition of CT to PET improves specificity, but also sensitivity, and adding PET to CT adds sensitivity and specificity in tumor imaging. The synergistic advantage of adding CT is that the attenuation correction needed for PET data can also be derived from the CT data. This makes PET-CT 25-30% faster than PET alone, leading to higher patient throughput and a more comfortable examination for patients typically lasting 20 minutes or less. FDG-PET-CT appears to provide relevant information in the staging and therapy monitoring of many tumors, such as lung carcinoma, colorectal cancer, lymphoma, gynaecological cancers, melanoma and many others, with the notable exception of prostatic cancer. for this cancer, choline derivatives may possibly become useful radiopharmaceuticals. The published literature on the applications of FDG-PET-CT in oncology is still limited but several designed studies have demonstrated the benefits of PET-CT. (authors)

Evaluation of PET Scanner Performance in PET/MR and PET/CT Systems: NEMA Tests.

Science.gov (United States)

Demir, Mustafa; Toklu, Türkay; Abuqbeitah, Mohammad; Çetin, Hüseyin; Sezgin, H Sezer; Yeyin, Nami; Sönmezoğlu, Kerim

2018-02-01

The aim of the present study was to compare the performance of positron emission tomography (PET) component of PET/computed tomography (CT) with new emerging PET/magnetic resonance (MR) of the same vendor. According to National Electrical Manufacturers Association NU2-07, five separate experimental tests were performed to evaluate the performance of PET scanner of General Electric GE company; SIGNATM model PET/MR and GE Discovery 710 model PET/CT. The main investigated aspects were spatial resolution, sensitivity, scatter fraction, count rate performance, image quality, count loss and random events correction accuracy. The findings of this study demonstrated superior sensitivity (~ 4 folds) of PET scanner in PET/MR compared to PET/CT system. Image quality test exhibited higher contrast in PET/MR (~ 9%) compared with PET/CT. The scatter fraction of PET/MR was 43.4% at noise equivalent count rate (NECR) peak of 218 kcps and the corresponding activity concentration was 17.7 kBq/cc. Whereas the scatter fraction of PET/CT was found as 39.2% at NECR peak of 72 kcps and activity concentration of 24.3 kBq/cc. The percentage error of the random event correction accuracy was 3.4% and 3.1% in PET/MR and PET/CT, respectively. It was concluded that PET/MR system is about 4 times more sensitive than PET/CT, and the contrast of hot lesions in PET/MR was ~ 9% higher than PET/CT. These outcomes also emphasize the possibility to achieve excellent clinical PET images with low administered dose and/or a short acquisition time in PET/MR.

CONSUMO ENERGÉTICO PROVENIENTE DE ALIMENTOS ULTRAPROCESSADOS POR ADOLESCENTES

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Helen Freitas D’Avila

Full Text Available RESUMO Objetivo: Avaliar o consumo proveniente dos alimentos ultraprocessados e fatores relacionados em adolescentes. Métodos: Estudo transversal com 784 adolescentes (de ambos os sexos e entre 12 a 19 anos de escolas públicas e privadas do município de Palmeira das Missões, Brasil. O consumo alimentar foi registrado pelo questionário semiquantitativo de frequência de consumo de alimentos e convertido em energia (Kcal/dia. Os alimentos foram classificados em: minimamente processados, grupo 1 (G1; alimentos processados, grupo 2 (G2; e alimentos ultraprocessados, grupo 3 (G3. As variáveis avaliadas foram: sexo, classe socioeconômica, cor, atividade física, índice de massa corpórea (IMC e níveis pressóricos. Na comparação de variáveis quantitativas foi usado o teste de Mann-Whitney e o teste H de Kruskal-Wallis. Para ajustar as diferenças entre os grupos, considerando os efeitos de calorias totais, foi aplicado o teste de análise de covariância (ANCOVA. Resultados: A mediana do consumo energético total foi de 3.039,8 Kcal e a de ultraprocessados foi de 1.496,5 Kcal/dia (49,23%. O consumo calórico proveniente dos alimentos do G1, do G2 e do G3 não diferiu de acordo com a cor da pele dos adolescentes. Os adolescentes pertencentes às classes C e D são os maiores consumidores de calorias do G2 e do G3 (p<0,001. Os adolescentes insuficientemente ativos consomem menos calorias de alimentos minimamente processados. Os adolescentes eutróficos apresentam maior consumo do G3 (p<0,001, quando comparados aos que possuem excesso de peso. Conclusões: O consumo de alimentos ultraprocessados associou-se ao nível social, ao nível de atividade física e ao estado nutricional.

Estudo do consumo de cimento no Brasil no periodo 1980-1995

OpenAIRE

Julio Cesar Recuero

1997-01-01

Resumo: Este trabalho analisa a mudança no consumo de cimento no Brasil nas últimas duas décadas. Para tanto, avaliou-se a evolução do consumo de cimento frente aos demais indicadores econômicos do país. Baseando-se nestes indicadores e em modelos para o setor da construção civil de outros países, foi elaborado um modelo exploratório de consumo de cimento. No período estudado, observa-se a relação inversa entre o consumo de cimento e a taxa de inflação, a taxa de juros e a taxa de desemprego,...

Tribus de consumo. Hacia la autosegmentación del consumidor

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Nicolás Martín Ortiz Esaine

2016-11-01

Full Text Available El siguiente artículo busca comprender el consumo desde una mirada de las tribus de consumo. A su vez, busca posicionarse como una nueva alternativa metodológica para las empresas de estudios de mercados, como un criterio innovador de segmentación. Se exponen las exploraciones de visitas de campo a diversas tribus de consumo de Lima Metropolitana. En total nos sumergimos en nueve comunidades culturales: skaters, gamers, surfers, k-popers, atléticos, hipsters, otakus, melómanos y graffiteros. Nos enfocamos primero, en la relación sociedad y tribu; segundo, sus características y aplicaciones de marketing. El artículo concluye con una reflexión acerca de elementos claves del criterio de segmentación por tribus de consumo.

Pathogenic outcome following experimental infection of sheep with Chlamydia abortus variant strains LLG and POS.

Science.gov (United States)

Livingstone, Morag; Wheelhouse, Nicholas; Ensor, Hannah; Rocchi, Mara; Maley, Stephen; Aitchison, Kevin; Wattegedera, Sean; Wilson, Kim; Sait, Michelle; Siarkou, Victoria; Vretou, Evangelia; Entrican, Gary; Dagleish, Mark; Longbottom, David

2017-01-01

This study investigated the pathogenesis of two variant strains (LLG and POS) of Chlamydia abortus, in comparison to a typical wild-type strain (S26/3) which is known to be responsible for late term abortion in small ruminants. Challenge with the three strains at mid-gestation resulted in similar pregnancy outcomes, with abortion occurring in approximately 50-60% of ewes with the mean gestational lengths also being similar. However, differences were observed in the severity of placental pathology, with infection appearing milder for strain LLG, which was reflected in the lower number of organisms shed in vaginal swabs post-partum and less gross pathology and organisms present in placental smears. Results for strain POS were somewhat different than LLG with a more focal restriction of infection observed. Post-abortion antibody responses revealed prominent differences in seropositivity to the major outer membrane protein (MOMP) present in elementary body (EB) preparations under denaturing conditions, most notably with anti-LLG and anti-POS convalescent sera where there was no or reduced detection of MOMP present in EBs derived from the three strains. These results and additional analysis of whole EB and chlamydial outer membrane complex preparations suggest that there are conformational differences in MOMP for the three strains. Overall, the results suggest that gross placental pathology and clinical outcome is not indicative of bacterial colonization and the severity of infection. The results also highlight potential conformational differences in MOMP epitopes that perhaps impact on disease diagnosis and the development of new vaccines.

Pathogenic outcome following experimental infection of sheep with Chlamydia abortus variant strains LLG and POS.

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Morag Livingstone

Full Text Available This study investigated the pathogenesis of two variant strains (LLG and POS of Chlamydia abortus, in comparison to a typical wild-type strain (S26/3 which is known to be responsible for late term abortion in small ruminants. Challenge with the three strains at mid-gestation resulted in similar pregnancy outcomes, with abortion occurring in approximately 50-60% of ewes with the mean gestational lengths also being similar. However, differences were observed in the severity of placental pathology, with infection appearing milder for strain LLG, which was reflected in the lower number of organisms shed in vaginal swabs post-partum and less gross pathology and organisms present in placental smears. Results for strain POS were somewhat different than LLG with a more focal restriction of infection observed. Post-abortion antibody responses revealed prominent differences in seropositivity to the major outer membrane protein (MOMP present in elementary body (EB preparations under denaturing conditions, most notably with anti-LLG and anti-POS convalescent sera where there was no or reduced detection of MOMP present in EBs derived from the three strains. These results and additional analysis of whole EB and chlamydial outer membrane complex preparations suggest that there are conformational differences in MOMP for the three strains. Overall, the results suggest that gross placental pathology and clinical outcome is not indicative of bacterial colonization and the severity of infection. The results also highlight potential conformational differences in MOMP epitopes that perhaps impact on disease diagnosis and the development of new vaccines.

Relaciones entre estilos de personalidad y tipos de consumo de alcohol

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Jairo Andrés Castañeda Arcila

2013-01-01

Full Text Available Objetivo. Esta investigación buscó identificar, en la población adulta del municipio de El Retiro (Antioquia, los tipos de consumo de alcohol, así como su relación con estilos de personalidad. Método. Se realizó un estudio transversal, descriptivo y correlacional. Se aplicaron dos instrumentos, Millon Inventory of Personality (MIPS y Alcohol Use Disorder Identification Test (Audit en una muestra de 61 participantes, de los cuales 33 fueron hombres y 28 mujeres. Resultados. El tipo de consumo de bebidas alcohólicas más frecuente en el municipio de El Retiro fue el consumo sin riesgo (68.9%. Además, se presentaron diferencias estadísticamente significativas en el tipo de consumo de alcohol según el género. Particularmente, los hombres registraron dependencia al alcohol. Asimismo, se halló que en los hombres el consumo de alcohol se encuentra relacionado con los estilos de personalidad como la innovación (r = 0.35, la discrepancia (r = 0.40 y el dominio (r = 0.46; mientras que en las mujeres se relacionan con la discrepancia (r = 0.38, la expansión (r = 0.39, la modificación (r = 0.40 y la adecuación (r = 0.42. Para ambos géneros, el consumo de riesgo se correlaciona con el estilo de sistematización (r = 0.67, el consumo perjudicial con la protección (r = 0.89 y la dependencia al alcohol con la indecisión (r = 0.99. Conclusión. Las tres categorías en las que se agrupan los estilos de personalidad (metas motivacionales, modos cognitivos y comportamientos interpersonales, se asociaron diferencialmente con el consumo sin riesgo, con riesgo, perjudicial y dependencia, encontrando que estas relaciones entre estilo de personalidad y consumo también muestran diferencia por género.

Inadequação do consumo de nutrientes entre adolescentes brasileiros Consumo inadecuado de nutrientes entre adolescentes brasileños Inadequate nutrient intake in Brazilian adolescents

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Rosely Sichieri

2013-02-01

Full Text Available OBJETIVO: Estimar o consumo de energia e nutrientes e a prevalência de inadequação da ingestão de micronutrientes entre adolescentes brasileiros. MÉTODOS: Amostra probabilística composta por 6.797 adolescentes (49,7% do sexo feminino entre dez e 18 anos de idade foi avaliada no Inquérito Nacional de Alimentação, 2008-2009. Os fatores de expansão, a complexidade do desenho da amostra e a correção da variabilidade intrapessoal do consumo foram considerados. A prevalência de inadequação de consumo de micronutrientes foi estimada pela proporção de adolescentes com ingestão abaixo da necessidade média estimada. Para o sódio, estimou-se a prevalência de consumo acima do valor de ingestão máxima tolerável. RESULTADOS: A média de consumo de energia variou de 1.869 kcal, observada nas adolescentes de 10 a 13 anos, a 2.198 kcal, estimada para os adolescentes de 14 a 18 anos. Os carboidratos forneceram 57% da energia total, os lipídios, 27% e as proteínas, 16%. As maiores prevalências de inadequação foram observadas para cálcio (> 95%, fósforo (entre 54% e 69% e vitaminas A (entre 66% e 85%, E (100% e C (entre 27% e 49%. Mais de 70% dos adolescentes apresentaram consumo de sódio superior à ingestão máxima tolerável. CONCLUSÕES: As médias de consumo energético e a distribuição de macronutrientes eram adequadas, mas foram observadas elevadas prevalências de inadequação no consumo de vitaminas e minerais, destacando-se consumo de sódio muito acima do recomendado, consumo de cálcio reduzido e nas adolescentes de 14 a 18 anos foi observada importante inadequação na ingestão de ferro.OBJETIVO: Estimar el consumo de energía y nutrientes y la prevalencia de ingestión inadecuada de micronutrientes entre adolescentes brasileños. MÉTODOS: La muestra probabilística compuesta por 6.797 adolescentes (49,7% del sexo femenino entre diez y 18 años de edad fue evaluada en la Pesquisa Nacional de Alimentación, 2008

Impulsividad y consumo de alcohol y tabaco en adolescentes

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María del Carmen Pérez-Fuentes

2015-12-01

Full Text Available La etapa de la adolescencia se caracteriza por una prematura experimentación de nuevas experiencias y sensaciones. Estas experiencias, pasan en ocasiones por el consumo de drogas, que aun siendo legales y socialmente aceptadas, las consecuencias negativas en el desarrollo del adolescente comienzan a hacerse patentes. En los últimos años se ha observado una disminución en el consumo de tabaco en los adolescentes españoles, no así en el consumo de alcohol. Una de las causas de inicio en las drogas es la personalidad o conducta impulsiva. Así, el objetivo de este estudio es analizar la relación entre la impulsividad y la frecuencia de consumo de alcohol y tabaco en 822 alumnos de entre 13 y 18 años. Para ello, se utilizó la Escala de Impulsividad Estado (EIE y un cuestionario elaborado ad hoc para conocer las características demográficas y el consumo de alcohol y tabaco. Los resultados mostraron que aquellos estudiantes que se declararon consumidores obtuvieron puntuaciones significativamente más altas en impulsividad. De este modo, analizar detalladamente el perfil de los sujetos con este factor de riesgo puede favorecer la creación de programas más adecuados para la intervención.

Efeito compatibilizante de uma argila organofílica na blenda PLA/terpolímero (etileno/acrilato de metila/metacrilato de glicidila

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Gustavo F. Brito

2013-01-01

Full Text Available Neste trabalho, nanocompósitos obtidos a partir de blendas entre o poli (ácido lático e o terpolímero (etileno/acrilato de metila/metacrilato de glicidila foram confeccionados. A argila organofílica comercial Cloisite 20A foi utilizada como nanocarga. Interações entre a argila e o terpolímero foram investigadas por reometria de torque. As estruturas dos nanocompósitos foram determinadas por difração de raios X, sendo obtidos nanocompósitos intercalados e microcompósitos. A atuação da argila como agente compatibilizante foi evidenciada por fotomicrografias obtidas por microscopia eletrônica de varredura. As propriedades mecânicas das blendas mostraram-se dependentes tanto da morfologia como do grau de dispersão da argila.

Experiments with crowdsourced re-annotation of a POS tagging data set

DEFF Research Database (Denmark)

Hovy, Dirk; Plank, Barbara; Søgaard, Anders

2014-01-01

Crowdsourcing lets us collect multiple annotations for an item from several annotators. Typically, these are annotations for non-sequential classification tasks. While there has been some work on crowdsourcing named entity annotations, researchers have assumed that syntactic tasks such as part......-of-speech (POS) tagging cannot be crowdsourced. This paper shows that workers can actually annotate sequential data almost as well as experts. Further, we show that the models learned from crowdsourced annotations fare as well as the models learned from expert annotations in downstream tasks....

Vida de vaso de inflorescências de Epidendrum ibaguense Kunth tratadas com inibidores de etileno

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MARCELO AMARAL DE MOURA

2010-12-01

Full Text Available O objetivo deste trabalho foi avaliar a influência de inibidores da síntese e ação do etileno, incluindo ácido aminooxiacético (AOA, ácido aminoetoxivinilglicina (AVG, ácido acetilsalicílico (AAS e tiossulfato de prata (STS, aplicados na forma de pulverização ou solução de condicionamento sobre a qualidade de flores cortadas de Epidendrum ibaguense. As hastes foram colhidas e imediatamente submetidas aos seguintes tratamentos: (1 pulverização com 1,0 mM de AOA; (2 pulverização com 1,0 mM de AVG; (3 pulverização com 1,0 mM de AAS; (4 pulsing com 2,0 mM de STS, por 30 minutos; (5 pulverização com 1,0 mM de AOA + pulsing com 2,0 mM de STS, por 30 minutos; (6 pulverização com 1,0 mM de AVG + pulsing com 2,0 mM de STS; (7 pulverização com 1,0 mM de AAS + pulsing com 2,0 mM de STS; (8 pulverização + pulsing com água desionizada (controle. Após os tratamentos, as hastes foram mantidas em vasos com água desionizada, renovada a cada dois dias, para evitar o desenvolvimento de microrganismos. Ao final da longevidade, o qual variou de acordo com o tratamento, as inflorescências submetidas ao AVG e AVG + STS mostraram a maior porcentagem de abertura floral, visto que promoveram aumento de 49 e 88% em relação ao controle. A taxa de abscisão também foi influenciada pelos tratamentos, pois ao oitavo dia, as inflorescências controle apresentaram cerca de 51% de queda das flores, cujo início ocorreu, principalmente, a partir do quinto dia. As inflorescências tratadas ao AAS, AOA, STS, AVG, STS + AAS, STS + AOA e STS + AVG mostraram redução de 11, 39, 47, 71, 38, 61 e 86%, respectivamente. Além disso, houve atraso de 1, 2, 3, 4, 3, 3 e 8 dias para o início da abscisão, respectivamente. A longevidade de E. ibaguense foi afetada pelos inibidores do etileno, mas com exceção de AAS e AOA, os demais tratamentos foram significativamente maiores que o controle. O STS, AVG, AAS + STS, AOA + STS e AVG + STS tiveram longevidade

Consumo de bocadillos y exceso de peso en niños colombianos

OpenAIRE

Herrán F, Oscar Fernando; DelCastillo M, Sara; Fonseca C, Zulma Yanira

2015-01-01

Cuatrocientos noventa y cinco niños entre 0 y 17 años aportaron información sobre su consumo dietario en 966 formatos de recordatorios de las últimas 24 horas. En todos se estableció su estado de nutrición con base en antropometría utilizando los patrones de crecimiento de la OMS. Se determinó el consumo de energía y macronutrientes en 27 categorías del consumo dietario de bocadillos con base en evidencia científica. El objetivo fue establecer la relación entre el exceso de peso, el consumo d...

Consumo de sustancias psicoactivas en auxiliares de enfermería

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Johanna Londoño Restrepo

2017-05-01

Full Text Available Introducción: El consumo de drogas trae consecuencias adversas en todos los ámbitos y se considera un problema de salud pública. El objetivo fue determinar la prevalencia de consumo de sustancias psicoactivas en auxiliares de enfermería. Materiales y Métodos: Estudio descriptivo, transversal, muestra probabilística constituida por 110 auxiliares de enfermería que trabajaban en una institución de salud. La información se recolectó a través de una encuesta que contenía variables demográficas y de consumo, se aplicaron los test de CAGE y de Fagerström. Se calcularon medidas de tendencia central y de dispersión para variables cuantitativas y frecuencias absolutas y relativas para las cualitativas, se realizó análisis bivariado, que estableció la diferencia de proporciones de consumo en vida de sustancias psicoactivas por algunas variables sociodemográficas. Resultados: La mediana de edad fue de 29 años, el 81.8% eran mujeres, el 60% estaban solteras. La sustancia más consumida fue el alcohol con 62.7%, seguido por bebidas energizantes con 28.2% y tabaco 19.1%. Discusión: Igual que en otros estudios las sustancias más consumidas fueron el alcohol y el tabaco, los que más consumieron fueron los hombres. Los motivos para el consumo fueron socializar. Más de la cuarta parte consumieron bebidas energizantes para aumentar el estado de alerta. La prevalencia del consumo de alcohol en vida es menor que la reportada en población general colombiana. Conclusiones: El consumo de sustancias legales e ilegales excepto los sedantes fue menor a las reportadas en población general y semejante a otros estudios en personal de salud. Cómo citar este artículo: Londoño J, Álvarez ML. Consumo de sustancias psicoactivas en auxiliares de enfermería. Rev Cuid. 2017; 8(2: 1591-8. http://dx.doi.org/10.15649/cuidarte.v8i2.378

Vivienda sostenible para un consumo casi nulo

OpenAIRE

MENDOZA GÓMEZ, CLAUDIA MARÍA

2014-01-01

Este TFG pretende aplicar los conceptos de eficiencia energética y sostenibilidad en la edificación para conseguir una vivienda con un consumo casi nulo. Para ello, es necesario reducir la demanda y los consumos así como las emisiones de CO2, contribuyendo de esa forma a cuidar el medio ambiente, a reducir los gases de efecto invernadero y la huella de carbono de la vivienda. El propósito es conseguir una vivienda sostenible que aproveche todo el potencial de las energías renovables y, ello i...

Consumo responsable

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Educadores por la sostenibilidad

2007-01-01

Full Text Available Hablar de consumo moderado es plantear el problema del hiperconsumo de las sociedades “desarrolladas” y de los grupos poderosos de cualquier sociedad, que sigue creciendo como si las capacidades de la Tierra fueran infinitas. Baste señalar que los 20 países más ricosdel mundo han consumido en este siglo más naturaleza, es decir, más materia prima y recursos energéticos no renovables, que toda la humanidad a lo largo de su historia y prehistoria

Culpa e prazer: imagens do consumo na cultura de massa

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Everardo Rocha

2008-09-01

Full Text Available O objetivo deste artigo é estudar algumas das principais representações do consumo no senso comum e na cultura de massa. Essas representações tendem a classificar o consumo como algo hedonista, ou exercer sobre ele um discurso moralista, ou vê-lo como algo natural ou, ainda, como utilitário. Ao estudar as implica ções ideológicas dessas visões, este artigo pretende contribuir para o estudo do consumo como um sistema cultural central na sociedade moderno-contemporânea. Palavras-chave: Cultura e consumo; cultura de massa e ideologia; Teoria da comunicação; Antropologia do consumo. ABSTRACT The objective of this article is to study some of the main representations of consumption in the general sense and in mass culture. These representations tend to classify consumption as something hedonist, or answer to it with a moralistic rhetoric, or to see it as something natural or even as something utilitarian. While studying the ideological implications of these views, this article intends to contribute to the study of consumption as a central cultural system in the modern contemporary society. Keywords: Culture and consumption; mass culture and ideology; Theory of communication; Anthropology of consumption.

A Sociedade de Consumo e os Adolescentes: uma visão sobre as relações escolares frente à sociedade de consumo

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Tatiana Vanesca Wasum

2012-08-01

Full Text Available Os efeitos dos valores reproduzidos na sociedade de consumo, tais como o individualismo, a competição por status, a imitação e o exibicionismo, podem refletir nas relações escolares. Partindo desse princípio, se faz necessário propor reflexões sobre a cultura e a sociedade de consumo, relacionando-as com realidades vivenciadas na escola, como a violência entre colegas e as suas causas, torna-se significativo nos dias atuais. O presente artigo busca investigar se os adolescentes de baixa renda são afetados pelas imposições da sociedade de consumo ou como os valores impostos pela indústria cultural atingem as relações dos alunos de uma escola pública. Este trabalho apresenta o resultado de encontros de grupos focais realizados com alunos das oitavas séries de uma escola pública em São Jerônimo/RS. A partir de algumas imagens, procurei questionar os adolescentes se o consumo de produtos e serviços “da moda” seria capaz de deixálos mais felizes. Muitos dos alunos ouvidos nos grupos focais demonstraram, em suas falas, sentimentos de rejeição, diferença ou exclusão em relação aos adolescentes que demonstram mais condições econômicas pela capacidade de consumo destes. As relações escolares parecem ser afetadas pelos valores como o individualismo, a competição por status, a imitação e o exibicionismo.

Comparison of PET/CT with Sequential PET/MRI Using an MR-Compatible Mobile PET System.

Science.gov (United States)

Nakamoto, Ryusuke; Nakamoto, Yuji; Ishimori, Takayoshi; Fushimi, Yasutaka; Kido, Aki; Togashi, Kaori

2018-05-01

The current study tested a newly developed flexible PET (fxPET) scanner prototype. This fxPET system involves dual arc-shaped detectors based on silicon photomultipliers that are designed to fit existing MRI devices, allowing us to obtain fused PET and MR images by sequential PET and MR scanning. This prospective study sought to evaluate the image quality, lesion detection rate, and quantitative values of fxPET in comparison with conventional whole-body (WB) PET and to assess the accuracy of registration. Methods: Seventeen patients with suspected or known malignant tumors were analyzed. Approximately 1 h after intravenous injection of 18 F-FDG, WB PET/CT was performed, followed by fxPET and MRI. For reconstruction of fxPET images, MRI-based attenuation correction was applied. The quality of fxPET images was visually assessed, and the number of detected lesions was compared between the 2 imaging methods. SUV max and maximum average SUV within a 1 cm 3 spheric volume (SUV peak ) of lesions were also compared. In addition, the magnitude of misregistration between fxPET and MR images was evaluated. Results: The image quality of fxPET was acceptable for diagnosis of malignant tumors. There was no significant difference in detectability of malignant lesions between fxPET and WB PET ( P > 0.05). However, the fxPET system did not exhibit superior performance to the WB PET system. There were strong positive correlations between the 2 imaging modalities in SUV max (ρ = 0.88) and SUV peak (ρ = 0.81). SUV max and SUV peak measured with fxPET were approximately 1.1-fold greater than measured with WB PET. The average misregistration between fxPET and MR images was 5.5 ± 3.4 mm. Conclusion: Our preliminary data indicate that running an fxPET scanner near an existing MRI system provides visually and quantitatively acceptable fused PET/MR images for diagnosis of malignant lesions. © 2018 by the Society of Nuclear Medicine and Molecular Imaging.

Investigando o Consumo de Lazer por Idosos

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Marcelo de Rezende Pinto

2015-06-01

Full Text Available A partir da constatação de que ainda são incipientes os estudos que buscam investigar a perspectiva cultural do consumo, atrelada à percepção de que pouco se pesquisou sobre o consumo de lazer de consumidores da terceira idade, o artigo tem por objetivo geral apresentar resultados de uma pesquisa empírica cujo objetivo foi investigar como as experiências de consumo nas atividades de lazer por indivíduos da terceira idade interagem com o sistema cultural e simbólico envolvido no fluxo da vida social cotidiana. Para se atingir esses objetivos, adotou-se uma perspectiva interpretativa de investigação, a partir de uma abordagem etnográfica. Os resultados parecem indicar que os processos sociais, desde a construção de relacionamentos entre familiares, amigos e vizinhos até a construção de redes de convivência com integrantes dos clubes de terceira constituem-se os principais processos presentes nas atividades de lazer desses indivíduos.

Comparison between PET/MR and PET/CT in evaluation of oncological patients%PET/MR与PET/CT的对比研究

Institute of Scientific and Technical Information of China (English)

徐白萱; 富丽萍; 关志伟; 尹大一; 刘家金; 杨晖; 张锦明; 陈英茂; 安宁豫

2014-01-01

Objective To verify the feasibility of the integrated PET/MR for oncological applications by comparing PET/MR with PET/CT in terms of lesion detection and quantitative measurement.Methods A total of 277 patients (165 males,112 females,average age (52.9± 12.6) years) voluntarily participated in this same-day PET/CT and PET/MR comparative study.The time interval between the two studies was 15-35 min.PET/CT images were acquired and reconstructed following standard protocols.PET/MR covered the body trunk with a sequence combination of transverse T1 weighted imaging (WI) 3D-volumetric interpolated breath-hold,T2WI turbo spin echo with fat saturation,diffusion-weighted imaging,and simultaneous PET acquisition.PET images were reconstructed by vender-provided attenuation correction methods.The results of PET/CT and PET/MR were regarded as positive if any modality (CT,PET or MRI) was positive.SUVmax was obtained by the manually drawn ROI.Detection rates were compared with x2 test and SUVmax from the two modalities was analyzed with Spearman correlation analysis.Results A total of 353 lesions were detected in 220 patients.Compared to PET/CT,PET/MR revealed 30 additional true-positive lesions,while missed 6.The detection rates between PET/CT and PET/MR were significantly different (P＜0.05).The lesion-based and patient-based consistency was 89.8％ (317/353) and 85.9％ (189/220),respectively.There were significant correlations of SUVmax between PET/MR and PET/CT for lesions(rs =0.91,P＜0.01) and for normal tissues(rs =0.62-0.76,all P＜0.01).Conclusions With reference to PET/CT,integrated PET/MR may provide comparable semi-quantitative measurements of pathological lesions as well as normal tissues.Integrated PET/MR may be more effective to detect lesions in abdomen and pelvis.%目的 通过与PET/CT在病灶检测及定量分析方面的比较,论证PET/MR一体机应用于临床的可行性.方法 2012年5月至2013年2月共300例患者同天间隔15 ～ 35 min行PET/CT和PET

Consumo de alcohol en ratas adolescentes tratadas con reserpina y fluoxetina

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Paul Ruiz

2017-01-01

Full Text Available Si bien se ha estudiado el vínculo entre los trastornos de estado de ánimo y el consumo de alcohol, tanto en humanos como en animales, todavía no es del todo claro cómo se da esta relación, y menos aún durante la adolescencia. La administración de reserpina, un depletor de monoaminas, es un modelo ampliamente utilizado en roedores adultos para inducir comportamientos asociados a depresión, pero se desconoce su utilidad en otras etapas del desarrollo. En este trabajo validamos este modelo en ratas adolescentes y posteriormente estudiamos el consumo de alcohol en estos animales, así como su modulación por antidepresivos. En el experimento 1 se administró reserpina (0.0 o 1.0 mg/kg, durante 4 días, IP a ratas Wistar machos de 30 días. El consumo de alcohol fue evaluado luego de observar comportamientos asociados a depresión e indagar indicadores neuroendocrinos de esta patología. En el experimento 2 los animales recibieron reserpina, seguida por el antidepresivo fluoxetina (0.0 o 10.0 mg/kg, durante 4 días, IG, y luego se evaluó el consumo de alcohol. Los resultados mostraron que la reserpina aumentó significativamente los comportamientos asociados a depresión y alteró los niveles de dopamina en la corteza insular y de hormonas tiroideas en sangre. En la prueba de consumo de alcohol los animales deprimidos, pero no los controles, mostraron un incremento en el consumo a través de los días. El segundo experimento replicó parcialmente este perfil, y no se observó un efecto significativo del antidepresivo en el consumo de alcohol. Los resultados indican que la reserpina es útil para modelar en ratas adolescentes comportamientos asociados a depresión. Se encontró una relación entre este estado y el consumo de alcohol, que no se pudo revertir con antidepresivos.

Pet Problems at Home: Pet Problems in the Community.

Science.gov (United States)

Soltow, Willow

1984-01-01

Discusses problems of pets in the community, examining the community's role related to disruptive pets and pet overpopulation. Also discusses pet problems at home, offering advice on selecting a pet, meeting a pet's needs, and disciplining pets. Includes a list of books, films/filmstrips, teaching materials, and various instructional strategies.…

Subjetivação e consumo em sites de relacionamento

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Marta de Araújo Pinheiro

2009-09-01

Full Text Available Resumo Construção de perfis, customização das páginas pessoais, compartilhamento de bens culturais nas redes sociais na internet vêm transformando as relações entre subjetivação, cultura e consumo. A progressiva liberação da associação do consumo às categorias de classe social, estilos de vida e atualização do self permite aproximá-lo do conceito de governabilidade. Como estudo de caso, o site de relacionamentos Myspace.com. Palavras-chave: Sites de relacionamentos; consumo; Myspace.com. Resumen La construcción de perfiles, la adaptación de las páginas personales, y el compartimiento de bienes culturales en las redes sociales de Internet están transformando las relaciones entre subjetivación, cultura y consumo. La liberación progresiva de la asociación del consumo a las categorías de clases sociales, estilos de vida y auto-actualización permite aproximarlo al concepto de gobernabilidad. Se utiliza la red Myspace. com como estudio de caso. Palabras-clave: Red social; consumo; Myspace.com. Abstract Profiles construction, personal web pages customization and the sharing of cultural products over internet social network are changing the relations between subjectivation, culture and consumption. The continuous liberation of the association of consumption to the categories of social classes, lifestyles and self-actualization allows us to consider the self closer to the concept of governmentality. The network MySpace.com is taken as a case study. Keywords: Social networks; consumption; MySpace.com.

O homem sem qualidades: modernidade, consumo e identidade cultural

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Silvia Pimenta Veloso Rocha

2008-09-01

Full Text Available Este artigo pretende analisar a sociedade de consumo como ruptura com a tradição. Uma sociedade tradicional deixa muito pouca coisa à escolha de seus membros; a modernidade, ao contrário, nos oferece todas as escolhas, mas, libertando o homem das instituições que determinavam seu lugar, impõe ao indivíduo a tarefa de criar a si mesmo. O consumo surge como o lugar por excelência desta construção: é aderindo a determinados estilos de vida comportamentos, valores e hábitos de consumo que o homem moderno constrói uma identidade. Palavras-chave: Consumo; modernidade; sujeito; identidade; estilo de vida. ABSTRACT A traditional society leaves litlle choice to its members, since it’s institutions define a priori their identity. Modernity, on the contrary, offers us every choice but as it releases man from the institutions wich stablished his place, it imposes him the task to create his identity. The act of consuming appears as the locus of such a construction: by adopting certain “life styles attitudes, values and consumption habits modern man creates his identity. Keywords: Consumer society; modernity; subject; identity; life style.

Consumo de alcohol y tabaco en estudiantes de enfermería

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Juan Yovani Telumbre-Terrero

2015-12-01

Full Text Available Introducción. Los estudiantes de enfermería están inmersos en un contexto cultural tanto protector como de riesgo en cuanto  al consumo de drogas, durante su proceso académico y/ o laboral, dado que enfrentan diversas situaciones físicas, emocionales y sociales que pueden aumentar la probabilidad de consumo con el fin de mitigar tales situaciones. El objetivo de la presente investigación fue determinar el tipo de consumo de alcohol y tabaco en estudiantes de enfermería. Método. La población estuvo formada por 172 estudiantes de un programa de Licenciatura en Enfermería de dos universidades privadas del área Metropolitana de Monterrey Nuevo León, México. El diseño del estudio es no experimental de tipo transversal descriptivo. Se utilizó una cédula de datos personales y de consumo de alcohol y tabaco y el Cuestionario de Identificación de Desórdenes por Uso de Alcohol (AUDIT. Resultados. Se identificó que predomina un tipo de consumo sensato de alcohol, seguido del dependiente y de uno dañino. En relación con el consumo de tabaco, prevalecieron los no fumadores, seguido de los fumadores experimentales, los exfumadores, los usuarios y los dependientes. Conclusión. Estos resultados permiten comprender mejor la magnitud del problema del consumo de alcohol y tabaco entre los estudiantes universitarios, específicamente entre los estudiantes de enfermería quienes serán futuros profesionales de la salud y que actuarán como educadores y promotores para la adopción de estilos de vida saludables en la población general

Atividade respiratória e evolução de etileno em alface crespa minimamente processada armazenada sob duas temperaturas Respiratory activity and ethylene evolution of fresh-cut crisphead lettuce stored under two temperatures

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Leonora Mansur Mattos

2008-12-01

Full Text Available O processamento mínimo de hortaliças envolve operações que ocasionam diversas alterações metabólicas no tecido processado, como elevação da atividade respiratória e evolução de etileno. A respiração é um processo complexo pelo qual reações químicas oxidam compostos orgânicos a dióxido de carbono e água para produção de energia. O aumento na evolução de etileno é, também, de extrema importância e pode ser observado em hortaliças submetidas ao processamento mínimo. No presente trabalho, estudaram-se efeitos fisiológicos desencadeados pelo processamento mínimo de alface (Lactuca sativa L., visando conhecer a melhor temperatura de armazenamento bem como o estresse causado pelo processamento mínimo afeta o produto. Verificou-se que, logo após o processamento mínimo, as taxas respiratórias eram estatisticamente diferentes para os materiais processados a 5 e 10 mm e folha inteira, tanto na temperatura de 5 ºC quanto a 10 ºC. Verificou-se que o armazenamento a 5 ºC reduziu de forma mais rápida o metabolismo respiratório quando se comparou com o armazenamento a 10 ºC. O perfil das curvas de atividade respiratória e evolução de etileno da alface processada a 10 mm foi o mesmo para as duas temperaturas estudadas, diferindo apenas nos valores, que foram mais altos, conforme esperado, para a temperatura de 10 ºC. No armazenamento à temperatura de 5 ºC, pôde-se observar a redução da evolução de etileno para o material processado a 10 mm, mas não para o processado a 5 mm, nas duas primeiras horas após o processamento mínimo. A melhor temperatura para o armazenamento da alface minimamente processada foi de 5 ºC e o produto processado como folha inteira apresentou menor taxa respiratória e elevação de etileno.Fresh-cut technology involves many operations that might cause metabolic alterations in the processed tissue such as increase in respiration rate and ethylene evolution. Respiration is a complex

Evaluation of PET Scanner Performance in PET/MR and PET/CT Systems: NEMA Tests

OpenAIRE

Mustafa Demir; Türkay Toklu; Mohammad Abuqbeitah; Hüseyin Çetin; H. Sezer Sezgin; Nami Yeyin; Kerim Sönmezoğlu

2018-01-01

Objective: The aim of the present study was to compare the performance of positron emission tomography (PET) component of PET/computed tomography (CT) with new emerging PET/magnetic resonance (MR) of the same vendor. Methods: According to National Electrical Manufacturers Association NU2-07, five separate experimental tests were performed to evaluate the performance of PET scanner of General Electric GE company; SIGNATM model PET/MR and GE Discovery 710 model PET/CT. The main investigated...

Evaluation of PET Scanner Performance in PET/MR and PET/CT Systems: NEMA Tests

OpenAIRE

Demir, Mustafa; Toklu, Türkay; Abuqbeitah, Mohammad; Çetin, Hüseyin; Sezgin, H. Sezer; Yeyin, Nami; Sönmezoğlu, Kerim

2018-01-01

Objective: The aim of the present study was to compare the performance of positron emission tomography (PET) component of PET/computed tomography (CT) with new emerging PET/magnetic resonance (MR) of the same vendor. Methods: According to National Electrical Manufacturers Association NU2-07, five separate experimental tests were performed to evaluate the performance of PET scanner of General Electric GE company; SIGNATM model PET/MR and GE Discovery 710 model PET/CT. The main investigated asp...

Diagnóstico del consumo de sustancias psicoactivas en adolescentes

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Ruth Esperanza Caicedo-Fonseca

2013-12-01

Full Text Available Objetivo: establecer el diagnóstico del consumo de sustancias psicoactivas en los adolescentes escolarizados de San José de Cúcuta y el área metropolitana. Materiales y Métodos: se aplicó una metodología que corresponde al paradigma cuantitativo de tipo descriptivo, retrospectivo. La muestra del estudio estuvo conformada por 343 alumnos de grados Décimo y Undécimo de colegios oficiales del área Metropolitana de Cúcuta. El instrumento empleado en la recolección de información fue la encuesta “ZERO SPA Resultados: los problemas emocionales no es un motivo de consumo de Sustancias Psicoactivas (SPA representado por un 87.1%, el rango de edad en el cual se inicia el consumo es a los 10 a 15 años de edad con un 49%. Las sustancias psicoactivas más consumidas son cafeína, el alcohol y el cigarrillo y en menor proporción consumen hongos, marihuana, cocaína, bóxer, éxtasis y gasolina. Conclusiones: el comportamiento actual de los adolescentes gira en torno a tres grandes variables como son la sexualidad, la violencia y las sustancias psicoactivas. Las relaciones interpersonales del adolescente y conocimiento sobre el consumo de Sustancias Psicoactivas (SPA dan la pauta y decisión frente al consumo de estas.

The Role of mPOS System in Process Change and Strategy Change: A Situated Change Perspective

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Yao Chin Lin

2015-10-01

Full Text Available The purpose of this study is to revisit the relationship among information technology (IT, Process, and Strategy. We focus on the impact of mobile Point of Sales (mPOS on changing of operational processes in the restaurant industry. This study investigates the changing of IT strategy and service strategy. The research model was developed based on the literature (strategic alignment model and situated change perspective and inputs from the restaurant industry and IT experts. The data of this study are collected from observation and face-to-face interviews with both business and IT personnel from 10 restaurants in Taiwan. The findings of this study provide a comprehensive view about the ways processes change once restaurants implements mPOS. We also figure out the impact of this change on IT strategy and service strategy. This study’s results shed new light on IT implementation. Researchers need to look at IT in different ways and suggest suitable solutions for practitioners.

PERSONALIDADE E CONSUMO ECOLOGICAMENTE CONSCIENTE

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Márcio Augusto Gonçalves

2008-08-01

Full Text Available Adotando-se como moldura teórica o Modelo Meta-teórico de Motivação e Personalidade (MOWEN, 2000, investigou-se a relação entre personalidade e consumo ecologicamente consciente. Por meio de um levantamento com uma amostra de 735 pessoas, obteve-se razoável sustentação empírica para um modelo em que os traços de personalidade explicam percentual considerável da variância do consumo ecologicamente consciente (R2 = 33%, interpretado como traço superficial da personalidade do consumidor. No modelo estimado, construtos relacionados ao cuidado com problemas ambientais são interpretados como traços situacionais, que remetem a traços mais profundos de personalidade. O significado dos resultados é avaliado conforme seu potencial em sustentar intervenções educacionais para promover o comportamento ecologicamente consciente.

Consumo de alcohol en trabajadores de una industria en Monterrey, México Consumo de álcool em trabalhadores de uma indústria em Monterrey, México Alcohol consumption among industrial workers in Monterrey , Mexico

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Teresita de Jesús Campa Magallón

2005-10-01

Full Text Available El objectivo fue describir el consumo de alcohol en 129 trabajadores de una industria. La recolección de datos se realizó a través de los cuestionarios AUDIT y CECA. El mayor consumo fue en operarios masculinos con 31 años de edad, 9,8 años de escolaridad, 5 años de antigüedad laboral, casados, con consumo de 3 a 4 bebidas por ocasión (38,5%. Un consumo de 6 copas o más al mês se presentó en 32,7% de los operarios. La frecuencia de consumo mensual fue de 2 o 4 veces. 46,5% fueron considerados dependientes. Ocurrieron daños en 55% de los operarios y empleados. Los empleados refirieron consumo de alcohol en reuniones sociales con compañeros (63,6%. Los consecuencies del consumo fueron: cansancio físico (44,2%, problemas físicos (29,5%, disminución de rendimiento laboral (29,5% y la disminución de reflejos (21,7%. Delante del mayor consumo de alcohol, los trabajdores perciben menores consecuencias respecto a este consumo. Los que refirieron el no consumo se encontraban en la etapa de precontemplación.O objetivo foi descrever o consumo de álcool entre 129 trabalhadores de uma indústria. A coleta de dados foi realizada a través dos instrumentos AUDIT e CECA. A maior porcentagem de consumo foi em operários masculinos de 31 anos, escolaridade de 9,8 anos, tempo de trabalho 5 anos, casados. Identificou-se um consumo de 3 a 4 bebidas por ocasião (38,5%. Obteve-se o consumo de 6 copos ou mais por mês em 32,7% dos operários. A freqüência de consumo mensal foi de 2 ou 4 vezes, a dependência correspondeu a 46,5% e a ocorrência de danos a 55% dos operários e empregados. Os trabalhadores informaram consumo de álcool em encontros sociais com amigos (63,6%. As conseqüências desse consumo foram: cansaço físico (44,2%, problemas físicos (29,5%, diminuição do rendimento de trabalho (29,5% e diminuição de reflexos (21,7%. Diante de um maior consumo de álcool, os trabalhadores percebem menores conseqüências em relação a

CONSUMO DE ALCOHOL EN LOS ADOLESCENTES DE CHÍA Y SU PERCEPCIÓN DEL CONSUMO Y DE LA PERMISIVIDAD PARENTAL FRENTE AL USO DE SUSTANCIAS/ ALCOHOL CONSUMPTION IN ADOLESCENTS FROM CHÍA AND THEIR PERCEPTION OF PARENTAL CONSUMPTION AND PERMISSIVENESS WITH RESPECT TO SUBSTANCE USE/ CONSUMO DE ÁLCOOL NOS ADOLESCENTES DE CHÍA E SUA PERCEPÇÃO DO CONSUMO E DA PERMISSIVIDADE PARENTAL ANTE O USO DE SUBSTÂNCIAS

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Ángela M. Trujillo

2013-06-01

Full Text Available Este estudio tuvo como objetivo identificar las asociaciones entre el consumo de alcohol en adolescentes del municipio de Chía, Colombia, y la percepción que estos tienen del consumo de sustancias por parte de los padres y de la permisividad parental. Mediante un estudio correlacional se midieron las variables de interés a partir de una encuesta diseñada por los autores y aplicada a una muestra de 326 adolescentes. Los resultados mostraron una asociación positiva y significativa entre el consumo de alcohol en adolescentes y la percepción del consumo de los padres y de la permisividad parental. Se discute la importancia de generar programas preventivos que tengan presente las actitudes favorables de los padres hacia el consumo de alcohol en los adolescentes.

Consumo de alcohol y autoestima en adolescentes Consumo de álcool e autoestima em adolescentes Alcohol consumption and self esteem in adolescents

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Alicia Álvarez Aguirre

2010-06-01

Full Text Available La presente investigación tuvo como objetivo analizar la relación entre el nivel de autoestima y el consumo de alcohol en los adolescentes, a través de la realización de un estudio descriptivo transversal, en una facultad de enfermería en la ciudad de Querétaro, en México, en el mes de julio de 2008, en una muestra de 109 adolescentes, entre 17 y 20 años. Para la obtención de los datos fueron aplicados dos instrumentos: AUDIT y Cuestionario de autoestima de Rosemberg. La mayoría de los adolescentes participantes tuvieron la autoestima elevada (94.5%, ninguno presentó autoestima baja. El 80.7% de los adolescentes del estudio no tiene riesgo de consumo de alcohol. Se concluye que la mayoría de los adolescentes presentaron una elevada autoestima y tuvieron riesgo bajo de consumo de alcohol. Por lo que se sugiere implementar programas preventivos con respecto al consumo de alcohol y factores protectores a fin de que los adolescentes continúen con un estilo de vida saludable.O presente estudo teve como objetivo analisar a relação entre o nível de autoestima e o consumo de álcool em adolescentes, através da realização de estudo descritivo transversal, em uma faculdade de enfermagem de Queretaro, México, no mês de julho de 2008, com amostra de 109 adolescentes, entre 17 e 20 anos. Para obtenção dos dados, foram aplicados dois instrumentos, o AUDIT e o questionário de autoestima de Rosemberg. A maioría dos adolescentes participantes tinha autoestima elevada (94,5%, nenhum apresentou baixa autoestima. Nesta amostra, 80,7% dos adolescentes não possui risco para consumo de álcool. Conclui-se que os adolescentes apresentaram elevada autoestima e baixo risco para o consumo de álcool. Portanto, é necessário implementar programas preventivos relacionados ao consumo de álcool e identificar os fatores protetores para garantir a manutenção de hábitos saudáveis pelos adolescentes.The aim of this study was to analyze the

Conciencia social y ecológica en el consumo

OpenAIRE

José Raúl Luyando Cuevas

2016-01-01

La presente investigación se propone utilizar una concepción diferente del consumo que ayude a amalgamar la principal corriente teórica con el paradigma de la sustentabilidad. A este nuevo enfoque lo denominamos consumo con conciencia social y ecológica. La pretensión es que se pueda utilizar para transitar hacia una producción más sosteni- ble en el corto plazo.

Antisocial behavior and alcohol consumption by school adolescents Conducta antisocial y consumo de alcohol en adolescentes escolares Conduta anti-social e consumo de álcool em adolescentes escolares

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Karla Selene López García

2008-04-01

Full Text Available Adolescence is a vulnerable period and facilitates the start of risk behaviors, for instance the use of drugs. This study aims to describe the differences between antisocial behavior and alcohol consumption according to gender, age and education; as well as to discover the relation between antisocial behavior and alcohol consumption in 1,221 school adolescents from Monterrey - Nuevo Leon, Mexico. The findings reveal differences in antisocial behavior according to gender. Evidences showed that 41.3% of the students had consumed alcohol at sometime in their lives, and that differences exist in alcohol consumption according to age and education. Finally, the study found positive and significant relations between antisocial behavior and alcohol consumption (r s = .272, p La adolescencia se convierte en una etapa de vulnerabilidad y facilitador para el inicio de conductas de riesgo como es el consumo de drogas. Los objetivos del presente estudio fueron: describir las diferencias de la conducta antisocial y consumo de alcohol según sexo, edad y escolaridad; conocer la relación existente de la conducta antisocial con el consumo de alcohol en 1221 adolescentes escolares de Monterrey, Nuevo Léon, México, en relación a los hallazgos encontrados se presentan diferencias de la conducta antisocial por sexo; se destaca que 41.3% de los estudiantes consumieron alcohol alguna vez en su vida, y existen diferencias de consumo de alcohol por edad y escolaridad. Finalmente se encontró relación positiva y significativa de la conducta antisocial con el consumo de alcohol (r s=.272, pA adolescência se apresenta como uma etapa de vulnerabilidade e facilitadora para o início de condutas de risco como o consumo de drogas. Os objetivos do presente estudo foram: descrever as diferenças entre sexo, idade e escolaridade na conduta anti-social e o consumo de álcool e conhecer a relação existente entre a conduta anti-social e o consumo de álcool em 1221

Algunas reflexiones sobre el abordaje de la prevención del consumo de drogas en el ámbito familiar. La importancia de la educación en el consumo de marcas como un medio de prevención en el consumo de drogas

OpenAIRE

Conde Gutiérrez del Álamo, Fernando

2009-01-01

En este artículo se reflexiona sobre la problemática de la prevención del consumo de drogas en las familias. Se apunta la necesidad de reforzar las normas y límites en la educación de los hijos, como factores protectores de los consumos de drogas. La línea fundamental del artículo, sin embargo, señala la insuficiencia de este refuerzo, para subrayar la importancia de inscribir las políticas preventivas en el terreno del consumo de drogas en el medio familiar en un planteamiento más amplio de ...

Benzodiazepine use among employees of a private company Consumo de benzodiazepinas en trabajadores de una empresa privada Consumo de benzodiazepinas por trabalhadores de uma empresa privada

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Alide Salazar Molina

2008-08-01

Full Text Available This study aimed to identify variables associated to the consumption of benzodiazepine among workers of a private company in the VIII Region, Chile. This is a cross-sectional and correlative study. Study population: 40 employees of a private company. The instruments included a questionnaire on socio-demographic variables and a benzodiazepine questionnaire. There was no record of benzodiazepine consumption at the moment of the study. Twenty percent (20% of the interviewees had already used benzodiazepine in the past, whereas, half of them (10% in the last year. The bivariate analysis of the last year consumption of benzodiazepine with work hours variables showed no significant relation (p=0.073. No association was found between benzodiazepine consumption and socio-demographic variables among the study participants.El propósito de este estudio fue identificar las variables asociadas al consumo de benzodiazepinas en población trabajadora de una institución privada de la VIII Región, Chile. Diseño cuantitativo, transversal y correlacional. Población del estudio: 40 trabajadores de una empresa privada de la VIII Región, Chile. Instrumentos recolectores de datos. Cuestionario de variables biosociodemográficas y Cuestionario de benzodiazepinas. No se registró consumo de benzodiazepinas al momento del estudio. 20% de los entrevistados tenía antecedentes de consumo de benzodiazepinas en el pasado, de ellos la mitad (10% en el último año. El análisis bivariado del consumo de benzodiazepinas en el último año con variables del trabajo sólo mostró una relación débilmente significativa (p= 0,073 con la jornada de trabajo. No se encontró asociación entre el consumo de benzodiazepines y las variables sociodemográficas entre los participantes del estudio.O propósito deste estudo foi avaliar as variáveis associadas ao consumo de benzodiazepínicos em população trabalhadora de uma instituição privada da VIII Região, Chile. Este é um

Consumo de sustancias psicoactivas en estudiantes Universitarios en Villavicencio 2009-2010

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Mónica García-Baquero

2011-12-01

Full Text Available Introducción: El consumo de alcohol acompañado del consumo de tabaco es un fenómeno que se encuentra profundamente arraigado en muchas sociedades y se ha convertido en uno de los factores de mayor riesgo sanitario. Objetivo: Identificar la prevalencia del consumo de sustancias psicoactivas (alcohol y tabaco en jóvenes de 14 a 20 años, estudiantes de primer semestre de las universidades que se encuentran en el municipio de Villavicencio. Materiales y Métodos: Estudio de tipo descriptivo exploratorio, de corte trasversal. La población está conformada por 1878 estudiantes; que para el segundo semestre del año 2009 cursaban el primer semestre de formación universitaria. Resultados: La prevalencia de consumo de alcohol en algún momento de la vida en la población universitaria de Villavicencio se sitúa en el 95.6% (IC95: 93,9%– 96,9%; DE: 0.21. En relación con la prevalencia de consumo de cigarrillo en algún momento de la vida en la población universitaria de Villavicencio se halla en el 47.4% (IC95: 43,9%–51%, DE: 0.49; el 34.5% de ese consumo se inició entre los 14 y los 18 años. Discusión y Conclusiones: En general se encuentra que las prevalencias de consumo de alcohol en todos los casos están por encima de las cifras nacionales, en contraste con las de cigarrillo, las cuales se encuentran por debajo. El alcohol en los menores de edad es unasunto de gran relevancia en la población universitaria: Uno de cada cuatro (1/4 de los encuestados consumen alcohol y uno de cada diez (1/10 fuman. Aunque el alcohol y el cigarrillo son sustancias socialmente aceptadas, se encontró que la prevalencia de consumo de alcohol es superior. Ambas sustancias proporcionan al consumidor mayor liderazgo y ego entre sus grupo social, sin embargo es de resaltar que el alcohol inhibe los prejuicios sociales, es un facilitador de expresión emocional y potencializador de relaciones sociales, produciendo una serie de efectos o

Consumo de alcohol entre estudiantes Mexicanos de medicina

OpenAIRE

Puig-Nolasco,Angel; Cortaza-Ramirez,Leticia; Cristina Pillon,Sandra

2011-01-01

Este estudio tiene por objetivo identificar el patrón de consumo de alcohol entre los estudiantes mexicanos de medicina. Se trata de un estudio transversal realizado en la Universidad Veracruzana, en México, con 263 estudiantes (84,4%). El cuestionario contiene la Prueba de Identificación de Trastornos por el Uso del Alcohol y el Cuestionario de Estudiantes 2006. Los sujetos eran 60% mujeres, jóvenes. El uso en la vida fue de 71,9% y la edad de inicio 12,5 años. La frecuencia del consumo fue ...

Conciencia social y ecológica en el consumo

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José Raúl Luyando Cuevas

2016-01-01

Full Text Available La presente investigación se propone utilizar una concepción diferente del consumo que ayude a amalgamar la principal corriente teórica con el paradigma de la sustentabilidad. A este nuevo enfoque lo denominamos consumo con conciencia social y ecológica. La pretensión es que se pueda utilizar para transitar hacia una producción más sosteni- ble en el corto plazo.

El papel de los padres y los amigos en el consumo temprano de alcohol

OpenAIRE

Gallego Moya, Sígrid; Ibáñez Ribes, Manuel Ignacio

2016-01-01

Introducción: El consumo de alcohol en la adolescencia es atribuible a la influencia de variables de tipo social, sobre todo del grupo de iguales y del ámbito familiar. Es-pecíficamente, el consumo de los amigos resulta ser la variable más importante en las primeras etapas del consumo de alcohol. No obstante, el uso que hacen los padres de esta sustancia y el empleo de estilos permisivos e inconsistentes en la educación de sus hijos, parecen favorecer también el inicio temprano al consumo de ...

The mitochondrial cytochrome c peroxidase Ccp1 of Saccharomyces cerevisiae is involved in conveying an oxidative stress signal to the transcription factor Pos9 (Skn7).

Science.gov (United States)

Charizanis, C; Juhnke, H; Krems, B; Entian, K D

1999-10-01

In Saccharomyces cerevisiae two transcription factors, Pos9 (Skn7) and Yap1, are involved in the response to oxidative stress. Fusion of the Pos9 response-regulator domain to the Gal4 DNA-binding domain results in a transcription factor which renders the expression of a GAL1-lacZ reporter gene dependent on oxidative stress. To identify genes which are involved in the oxygen-dependent activation of the Gal4-Pos9 hybrid protein we screened for mutants that failed to induce the heterologous test system upon oxidative stress (fap mutants for factors activating Pos9). We isolated several respiration-deficient and some respiration-competent mutants by this means. We selected for further characterization only those mutants which also displayed an oxidative-stress-sensitive phenotype. One of the respiration-deficient mutants (complementation groupfap6) could be complemented by the ISM1 gene, which encodes mitochondrial isoleucyl tRNA synthetase, suggesting that respiration competence was important for signalling of oxidative stress. In accordance with this notion a rho0 strain and a wild-type strain in which respiration had been blocked (by treatment with antimycin A or with cyanide) also failed to activate Gal4-Pos9 upon imposition of oxidative stress. Another mutant, fap24, which was respiration-competent, could be complemented by CCP1, which encodes the mitochondrial cytochrome c peroxidase. Mitochondrial cytochrome c peroxidase degrades reactive oxygen species within the mitochondria. This suggested a possible sensor function for the enzyme in the oxidative stress response. To test this we used the previously described point mutant ccp1 W191F, which is characterized by a 10(4)-fold decrease in electron flux between cytochrome c and cytochrome c peroxidase. The Ccp1W191F mutant was still capable of activating the Pos9 transcriptional activation domain, suggesting that the signalling function of Ccp1 is independent of electron flux rates.

RIESGOS PARA LA SALUD DERIVADOS DEL CONSUMO VOLUNTARIO E INVOLUNTARIO DE TABACO

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Finn Edler von Eyben

2003-01-01

Full Text Available Este trabajo examina y actualiza los aspectos sanitarios del consumo de tabaco basándose especialmente en estudios llevados a cabo en países europeos, con énfasis en el tabaquismo en el lugar de trabajo. Se revisan los riesgos del consumo de tabaco para la salud en ambos sexos, el impacto en la esperanza de vida, las ventajas del abandono del consumo de tabaco, el patrón social del tabaquismo en las sociedades occidentales y las diferencias sociales en las enfermedades que causa. Se describen también los efectos inmediatos y a largo plazo del consumo involuntario de tabaco, sus consecuencias en el lugar de trabajo, y las técnicas de medida del Aire Contaminado por Humo de Tabaco (ACHT.

Riesgos para la salud derivados del consumo voluntario e involuntario de tabaco

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Eyben Finn Edler von

2003-01-01

Full Text Available Este trabajo examina y actualiza los aspectos sanitarios del consumo de tabaco basándose especialmente en estudios llevados a cabo en países europeos, con énfasis en el tabaquismo en el lugar de trabajo. Se revisan los riesgos del consumo de tabaco para la salud en ambos sexos, el impacto en la esperanza de vida, las ventajas del abandono del consumo de tabaco, el patrón social del tabaquismo en las sociedades occidentales y las diferencias sociales en las enfermedades que causa. Se describen también los efectos inmediatos y a largo plazo del consumo involuntario de tabaco, sus consecuencias en el lugar de trabajo, y las técnicas de medida del Aire Contaminado por Humo de Tabaco (ACHT.

Dependência para alimentar-se e consumo alimentar em idosos hospitalizados

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Arethusa Sass

2012-12-01

Full Text Available O objetivo do estudo foi verificar a associação entre o consumo alimentar e a dependência para alimentar-se em idosos hospitalizados, os quais foram entrevistados nas primeiras 24hs após internação na clínica médica de um hospital geral. Participaram da pesquisa 75 idosos com idade média de 70,9 anos, sendo 58,7% do sexo masculino e 17,3% com dependência para alimentar-se. Não foi evidenciada associação entre dependência para alimentar-se e o consumo de alimentos energéticos e construtores, mas o foi para o consumo dos alimentos reguladores como o alho e cebola (p=0,00 e o de água (p=0,04. Sugere-se a necessidade de orientação nutricional aos cuidadores, visto que a dependência para alimentar-se se associa ao baixo consumo de água entre idosos.

A lógica do consumo

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Tiago Eloy Zaidan

2017-06-01

Full Text Available Referência da obra resenhada: LINDSTROM, Martin. A lógica do consumo: verdades e mentiras sobre por que compramos. Tradução: Marcello Lino. Rio de Janeiro: Harper Collins Brasil, 2016.

Comparison of lesion detection and quantitation of tracer uptake between PET from a simultaneously acquiring whole-body PET/MR hybrid scanner and PET from PET/CT

International Nuclear Information System (INIS)

Wiesmueller, Marco; Schmidt, Daniela; Beck, Michael; Kuwert, Torsten; Gall, Carl C. von; Quick, Harald H.; Navalpakkam, Bharath; Lell, Michael M.; Uder, Michael; Ritt, Philipp

2013-01-01

PET/MR hybrid scanners have recently been introduced, but not yet validated. The aim of this study was to compare the PET components of a PET/CT hybrid system and of a simultaneous whole-body PET/MR hybrid system with regard to reproducibility of lesion detection and quantitation of tracer uptake. A total of 46 patients underwent a whole-body PET/CT scan 1 h after injection and an average of 88 min later a second scan using a hybrid PET/MR system. The radioactive tracers used were 18 F-deoxyglucose (FDG), 18 F-ethylcholine (FEC) and 68 Ga-DOTATATE (Ga-DOTATATE). The PET images from PET/CT (PET CT ) and from PET/MR (PET MR ) were analysed for tracer-positive lesions. Regional tracer uptake in these foci was quantified using volumes of interest, and maximal and average standardized uptake values (SUV max and SUV avg , respectively) were calculated. Of the 46 patients, 43 were eligible for comparison and statistical analysis. All lesions except one identified by PET CT were identified by PET MR (99.2 %). In 38 patients (88.4 %), the same number of foci were identified by PET CT and by PET MR . In four patients, more lesions were identified by PET MR than by PET CT , in one patient PET CT revealed an additional focus compared to PET MR . The mean SUV max and SUV avg of all lesions determined by PET MR were by 21 % and 11 % lower, respectively, than the values determined by PET CT (p CT and PET MR were minor, but statistically significant. Nevertheless, a more detailed study of the quantitative accuracy of PET MR and the factors governing it is needed to ultimately assess its accuracy in measuring tissue tracer concentrations. (orig.)

Actitud ante el consumo y no consumo de alcohol en estudiantes de preparatoria Mexico

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Manuel Antonio Lopez-Cisneros

2013-08-01

Full Text Available El objetivo del estudio fue identificar diferencias de actitud entre estudiantes de la educación secundaria consumidores y no de alcohol a través de la Teoría de la Conducta Planeada. Estudio descriptivo transversal con abordaje cuantitativo, con una muestra de 131 adolescentes. Se verifi có que 74% ya habían consumido alcohol y 18.3% tienen consumo dañino. Se constató que las creencias conductuales hacia el consumo eran más altas en los consumidores de alcohol ( X =29.32, Mdn=27.50 que en los no consumidores, así con la evaluación de las creencias en sentido positivo son más altas en los consumidores de alcohol ( X =17.72, Mdn=9.52 que en los no consumidores, haciéndose necesaria la implementación de programas preventivos que fortalezcan las creencias de los adolescentes, así como estimular las estrategias vinculadas con el fortalecimiento de factores protectores y estilos de vida saludables.

Enfisema bolhoso associado a consumo de drogas

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Sandra Figueiredo

2010-01-01

Full Text Available Resumo: O enfisema bolhoso é caracterizado pelo aumento dos espaços aéreos distais ao bronquíolo terminal com perda das paredes alveolares. Várias etiologias têm sido descritas, nomeadamente a deficiência de alfa1-antitripsina e o consumo de tabaco. À excepção da deficiência de alfa1-antitripsina, alguns casos de enfisema bolhoso no jovem continuam sem etiologia conhecida. Têm sido descritos alguns casos associados a consumo de drogas. O tabagismo associado ao consumo de drogas possivelmente criará as condições para o desenvolvimento de bolhas, com particular exuberância pelos lobos superiores. Os autores descrevem dois casos clínicos de doentes jovens, com história de consumo de drogas inaladas e enfisema bolhoso.Rev Port Pneumol 2010; XVI (1: 157-161 Abstract: Bullous emphysema is characterized by permanent enlargement of airspaces distal to the terminal bronchiole accompanied by destruction of alveolar walls. Several aetiologies have been described, namely deficiency of α1-antitrypsin and the consumption of tobacco. With the exception of the deficiency of α1-antitrypsin, some cases of bullous emphysema in the young adult continue without known aetiology. Some cases of bullous emphysema have been described, emphasising the relationship between the disease and drug consumption. The association possibly creates the conditions for the development of large lung bullae, with particular exuberance for the superior lobes. The authors describe two clinical cases of young patients, with history of consumption of smoked substance abuse and bullous emphysema.Rev Port Pneumol 2010; XVI (1: 157-161 Palavras-chave: Enfisema bolhoso, drogas inaladas, Key-words: Bullous emphysema, smoked substance abuse

Enfisema bolhoso associado a consumo de drogas

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Sandra Figueiredo

2010-01-01

Full Text Available Resumo: O enfisema bolhoso é caracterizado pelo aumento dos espaços aéreos distais ao bronquíolo terminal com perda das paredes alveolares. Várias etiologias têm sido descritas, nomeadamente a deficiência de alfa1-antitripsina e o consumo de tabaco. À excepção da deficiência de alfa1-antitripsina, alguns casos de enfisema bolhoso no jovem continuam sem etiologia conhecida. Têm sido descritos alguns casos associados a consumo de drogas. O tabagismo associado ao consumo de drogas possivelmente criará as condições para o desenvolvimento de bolhas, com particular exuberância pelos lobos superiores. Os autores descrevem dois casos clínicos de doentes jovens, com história de consumo de drogas inaladas e enfisema bolhoso. Abstract: Bullous emphysema is characterized by permanent enlargement of airspaces distal to the terminal bronchiole accompanied by destruction of alveolar walls. Several aetiologies have been described, namely deficiency of α1-antitrypsin and the consumption of tobacco. With the exception of the deficiency of α1-antitrypsin, some cases of bullous emphysema in the young adult continue without known aetiology. Some cases of bullous emphysema have been described, emphasising the relationship between the disease and drug consumption. The association possibly creates the conditions for the development of large lung bullae, with particular exuberance for the superior lobes. The authors describe two clinical cases of young patients, with history of consumption of smoked subs tance abuse and bullous emphysema. Palavras-chave: Enfisema bolhoso, drogas inaladas, Key-words: Bullous emphysema, smoked substance abuse

Consumo de frutas, verduras e legumes por gestantes adolescentes

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Antônia Caroline Diniz Brito

2016-11-01

Full Text Available Objetivo: Determinar o estado nutricional e os fatores associados ao consumo alimentar de frutas, verduras e legumes por gestantes adolescentes atendidas em um serviço público de referência para assistência pré-natal. Métodos: Estudo transversal e analítico, com 73 gestantes adolescentes de 10 a 19 anos, atendidas no Núcleo de Assistência ao Adolescente (NASA do Hospital Materno Infantil, em São Luís, Maranhão. Utilizou-se o Questionário de Frequência de Consumo Alimentar (QFCA, medidas antropométricas (peso, altura, índice de massa corporal - IMC - pré-gravídico e gravídico e questionário socioeconômico. As variáveis dependentes foram o consumo de frutas, verduras e legumes, e as independentes foram escolaridade, estado civil, raça, renda, situação demográfica, dados gestacionais e antropométricos. Resultados: Observou-se que 39,7% apresentaram IMC pré-gestacional de desnutrição, 50,7% de eutrofia, e menos de 10% sobrepeso ou obesidade. Para o IMC gestacional, os valores se alteraram, com 27,4% das gestantes desnutridas, 57,5% eutróficas e 15,1% com sobrepeso. Observou-se que os maiores percentuais de adequação para o consumo de frutas, verduras e legumes foram em adolescentes casadas ou em união estável (65,4%, que não trabalhavam (92,3% e com renda familiar menor que 1 salário mínimo (84,62%. Entretanto, a única associação positiva encontrada com o consumo de frutas, verduras e legumes foi o início do pré-natal. Conclusão: A maior parte das gestantes avaliadas apresentou-se eutrófica, apesar de cerca de um quarto apresentar baixo peso durante a gestação. Além disso, elas não consumiam uma dieta balanceada, com uma ingestão abaixo do recomendado de FVL. Entre os fatores relacionados a um melhor consumo de FVL destaca-se o início do acompanhamento pré-natal no primeiro trimestre.

Módulo de sincronización entre Tienda Online Prestashop y Unicenta POS

OpenAIRE

Sánchez Corredor, Montserrat

2015-01-01

[CASTELLÀ] Este proyecto consiste en la creación de un sistema que permite sincronizar los productos, categorías y stock, entre dos programas que gestionan tiendas. Estos programas son el TPV (Terminal Punto de Venta) uniCenta y el CMS (Content Management System) eCommerce (Electronic Commerce) Prestashop. [ANGLÈS] This project involves the creation of a system that synchronizes products, categories and stock between two programs that manage shops. These programs are the POS (Point of Sal...

O DISCURSO DO CONSUMO MORALISTA, NA REVISTA TURMA DA MÔNICA JOVEM

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Flávia Meneguelli Ribeiro Setubal

2016-08-01

Full Text Available A proposta do artigo é contribuir no âmbito educacional e dos estudos do consumo, desenvolvendo uma análise crítica da revista em quadrinhos Turma da Mônica Jovem (TMJ, dentro dos pressupostos teóricos e metodológicos dos estudos da semiótica discursiva, tendo como pano de fundo a sociedade de consumo atual. O corpus é formado pela edição 58, intitulada “Conflito de Gerações”, com o objetivo de identificar como o discurso do consumo moralista é apropriado pela revista, bem como que estratégias enunciativas são utilizadas para inscrever o público infantojuvenil neste discurso. Os resultados apontam para um alerta ao consumo desordenado de informações na internet, reiterando uma característica marcante do público infantojuvenil de TMJ, uma vez que seu discurso figurativiza essa relação jovens x tecnologia, o tempo todo. Ainda, a categoria de consumo moralista tem foco no público masculino, colocando os meninos como personagens principais das tramas ou situações apresentadas.http://dx.doi.org/10.21714/pretexto.v17i2.4085

Accuracy analysis of exterior orientation elements on vertical parallax in POS-supported aerial photogrammetry

Science.gov (United States)

Wu, Zhenli; Yuan, Xiuxiao

2009-10-01

This paper analyzes the effect of exterior orientation elements on vertical parallax, especially using the orientation parameters of aerial images obtained by a POS (Positioning and Orientation System) after calibration. Firstly, based on the theory of analytical relative orientation of consecutive photo connection, the exterior orientation elements can be easily translated to relative orientation elements. Then, the formula of vertical parallax can be deduced. The results of vertical parallax in left image space coordinate system are compared with the results calculated in the image coordinate system which are parallel to those of the object coordinate system. The validity and feasibility of the mathematical model are tested using two sets of actual data at different images scales. Finally, the differences between the effects of exterior orientation parameters on vertical parallax are compared using exterior orientation parameters obtained by traditional bundle block adjustment and by a POS after calibrated. And how the single element of exterior orientation effected on vertical parallax and how they worked together are analyzed. The empirical results indicate that the effects of different elements of exterior orientation on vertical parallax are different, all exterior orientation parameters can be affected by each other, so the overall effect of vertical parallax accuracy can be restricted by all exterior orientation parameters.

Sonolência e consumo de carboidratos entre motoristas de caminhão

OpenAIRE

Andressa Juliane Martins

2013-01-01

Introdução - Há evidências de que o aumento do consumo de carboidratos esteja associado à sonolência. Quando realizado à noite, o consumo de carboidratos parece ser um fator que afeta o desempenho no trabalho. Paradoxalmente, o trabalho noturno levaria ao aumento da ingestão de alimentos ricos em carboidratos como consequência da privação de sono. Objetivo - Verificar a existência de correlação entre a sonolência e consumo de carboidratos entre motoristas de caminhão. Métodos - Participaram d...

Detection of Cancer with PET and PET/CT in Asymptomatic Volunteers

International Nuclear Information System (INIS)

Chung, Ji In; Choi, Joon Young; Lee, Kyung Han; Kim, Byung Tae; Choi, Yoon Ho; Cho, Han Byoul; Shim, Jae Yong

2009-01-01

We retrospectively investigated the diagnostic performance of 18 F-fluorodeoxyglucose positron emission tomography (PET) and PET/CT for cancer detection in asymptomatic health-check examinees. This study consisted of 5091 PET or PET/CT conducted as part of annual health examination at one hospital from March 1998 to February 2008. To find the incidence of cancers, medical records of the subjects were thoroughly reviewed for a follow-up period of one year. The patterns of formal readings of PET and PET/CT were analyzed to assess the sensitivity and specificity for cancer detection. The histopathology and stage of the cancers were evaluated in relation to the results of PET. Eighty-six cancers (1.7%) were diagnosed within one year after PET or PET/CT. When PET and PET/CT results were combined, the sensitivity was 48.8% and specificity was 81.1% for cancer detection. PET only had a sensitivity of 46.2% and a specificity of 81.4%, and PET/CT only had a sensitivity of 75.0% and a specificity of 78.5% respectively. There were no significant differences in cancer site, stage and histopathology between PET positive and PET negative cancers. In 19.3% of formal readings of PET and PET/CT, further evaluation to exclude malignancy or significant disease was recommended. Head and neck area and upper gastrointestinal tract were commonly recommended sites for further evaluation. PET and PET/CT showed moderate performance for detecting cancers in asymptomatic adults in this study. More experience and further investigation are needed to overcome limitations of PET and PET/CT for cancer screening

Screening for depression in advanced disease: psychometric properties, sensitivity, and specificity of two items of the Palliative Care Outcome Scale (POS).

Science.gov (United States)

Antunes, Bárbara; Murtagh, Fliss; Bausewein, Claudia; Harding, Richard; Higginson, Irene J

2015-02-01

Depression is common among patients with advanced disease but often difficult to detect. To assess the Palliative care Outcome Scale (POS) (10 items) against the Geriatric Depression Scale (GDS)-10 total score and the Hospital Anxiety and Depression Scale (HADS)-Depression subscale total score and determine if the POS has appropriate items to screen for depression among people with advanced disease. This was a secondary analysis performed on five studies. Four psychometric properties were assessed: data quality, scaling assumptions, acceptability, and internal consistency (reliability). Receiver operating characteristic (ROC) curves were used to determine the area under the curve. Sensitivity, specificity, positive and negative predictive values, false positive and negative rates, and positive and negative likelihood ratios were computed. The overall sample had 416 patients from Germany and England: 144 had cancer and 267 had nonmalignant conditions. Prevalence of depression across the sample was 17.5%. Floor and ceiling effects were rare. Cronbach's alpha coefficients for POS items 7 and 8 summed, GDS-10 and HADS-Depression items varied: 0.61 (heart failure) and 0.80 (cancer). Two items combined (Item 7-feeling depressed and Item 8-feeling good about yourself) consistently presented the highest area under the ROC curve, ranging from 0.76 (95% CI 0.60, 0.93) (Germany, lung cancer) to 0.97 (95% CI 0.91, 1.0) (heart failure), highest negative predictive value, and lowest false negative rate. For the overall sample, the cutoff 2/3 presented a negative predictive value of 89.4% (95% CI 84.7, 92.8) and false negative rate of 10.6 (95% CI 7.2, 15.3). POS items 7 and 8 summed are potentially useful to screen for depression in advanced disease populations. Copyright © 2015 American Academy of Hospice and Palliative Medicine. Published by Elsevier Inc. All rights reserved.

Qualidade pós-colheita de frutos de tomate cv. Andréa tratados com etileno Postharvest quality of tomato fruits cv. Andréa treated with ethylene

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Caroline Andreuccetti

2007-03-01

Full Text Available O tomate é uma das principais hortaliças cultivadas no Brasil e tratamentos que propiciem o controle do amadurecimento são extremamente desejáveis. Avaliou-se a qualidade pós-colheita de tomates tipo italiano tratados com etileno. Tomates 'Andréa' foram colhidos em campos de produção comercial no estádio verde-maduro, selecionados para presença de danos externos e classificados quanto ao tamanho e cor e posteriormente foram tratados com 100 µL L-1 de etileno. Os ensaios foram planejados com delineamento inteiramente casualizado em esquema fatorial com quatro tratamentos e quinze repetições (n=10. Após a aplicação, os frutos foram divididos em dois lotes. Um lote permaneceu a 20º±1ºC e outro foi mantido a 12,5º±1ºC, ambos sob umidade relativa 90±5%. Tomates do tratamento controle foram mantidos nas mesmas condições de temperatura e umidade relativa. Os frutos foram avaliados após cada mudança de estádio de amadurecimento para as seguintes variáveis: coloração externa (L*a*b*, perda de massa, sólidos solúveis totais, acidez titulável e teor de ácido ascórbico. A aplicação de etileno não influenciou de maneira significativa as variáveis químicas e físicas estudadas. Frutos armazenados à temperatura de 20ºC demonstraram maior porcentagem de perda de massa ao longo do amadurecimento, com média de 2,60%. A relação brix/acidez apresentou pouca variação entre os tratamentos avaliados. Frutos do tratamento controle e mantidos à temperatura de 20ºC apresentaram mudança de coloração mais rápida no início dos experimentos, não sendo observada posteriormente diferença significativa no desenvolvimento da cor dos tratamentos avaliados. O tratamento com etileno não acelerou de forma significativa o amadurecimento de tomates 'Andréa' armazenado sob as duas temperaturas estudadas.Tomatoes are one of the most important vegetable crops grown in Brazil and treatments that facilitate ripening control are

PET

DEFF Research Database (Denmark)

Mariager, Rasmus Mølgaard; Schmidt, Regin; Heiberg, Morten Rievers

PET handler om den hemmelige tjenestes arbejde under den kolde krig 1945-1989. Her fortæller Regin Schmidt, Rasmus Mariager og Morten Heiberg om de mest dramatiske og interessante sager fra PET's arkiv. PET er på flere måder en udemokratisk institution, der er sat til at vogte over demokratiet....... Dens virksomhed er skjult for offentligheden, den overvåger borgernes aktiviteter, og den registrerer følsomme personoplysninger. Historien om PET rejser spørgsmålet om, hvad man skal gøre, når befolkningen i et demokrati er kritisk indstillet over for overvågningen af lovlige politiske aktiviteter......, mens myndighederne mener, at det er nødvendigt for at beskytte demokratiet. PET er på en gang en fortælling om konkrete aktioner og begivenheder i PET's arbejde og et stykke Danmarkshistorie. Det handler om overvågning, spioner, politisk ekstremisme og international terrorisme.  ...

Resistência à compressão de argamassa composta por resíduo de construção e demolição e politereftalato de etileno (PET) em flocos

OpenAIRE

Duarte, Eric Brum de Lima

2014-01-01

A indústria da construção tem, historicamente, uma relevante importância no desenvolvimento do Brasil. Este setor também é um grande vetor de desenvolvimento gerando muitos empregos diretos e indiretos, contribuindo para a melhoria da infraestrutura e diminuindo o déficit de moradias. Entretanto, essa contribuição positiva tem outro lado, pois a indústria da construção civil é responsável por um grande consumo de materiais e gera uma grande quantidade de resíduos que, se não forem adequadamen...

Clinical usefulness of PET in the management of oral cancer. Comparison between FDG-PET and MET-PET

International Nuclear Information System (INIS)

Kitagawa, Yoshimasa; Saitoh, Masaaki; Nakamura, Mikiko

2007-01-01

Inductive chemoradiotherapy has played an important role in preserving organs and functions in patients with oral squamous cell carcinoma (SCC). To determine whether a reduced form of surgery should be performed after chemoradiotherapy, accurate evaluation of residual tumor cells is essential. We investigated the clinical value of positron emission tomography with 18 F labeled fluorodeoxyglucose (FDG-PET) in the management of oral SCCs. Forty-five patients underwent two FDG-PET studies, one prior to and one at 6 weeks after the chemoradiotherapy. Pretreatment FDG-PET was useful in predicting the response to treatment. Posttreatment FDG-PET could evaluate residual viable cells and prognosis. Organ preservation may be feasible based on PET evaluation. Hence FDG-PET is a valuable tool in the treatment of oral cancer. 11 C-Methionine (MET) is another promising tracer for PET that can be used to assess metabolic demand for amino acids in cancer cells. A MET-PET and FDG-PET study was performed during the same period to investigate diagnostic accuracy in 40 oral malignancies. Sensitivity and positive predictive value of MET-PET were 95% and 100%, respectively, and were comparable with those of FDG-PET. Further study is required to determine the diagnostic significance of MET-PET in evaluating response to chemoradiotherapy. (author)

Development of PET/MRI with insertable PET for simultaneous PET and MR imaging of human brain

International Nuclear Information System (INIS)

Jung, Jin Ho; Choi, Yong; Jung, Jiwoong; Kim, Sangsu; Lim, Hyun Keong; Im, Ki Chun; Oh, Chang Hyun; Park, Hyun-wook; Kim, Kyung Min; Kim, Jong Guk

2015-01-01

Purpose: The purpose of this study was to develop a dual-modality positron emission tomography (PET)/magnetic resonance imaging (MRI) with insertable PET for simultaneous PET and MR imaging of the human brain. Methods: The PET detector block was composed of a 4 × 4 matrix of detector modules, each consisting of a 4 × 4 array LYSO coupled to a 4 × 4 Geiger-mode avalanche photodiode (GAPD) array. The PET insert consisted of 18 detector blocks, circularly mounted on a custom-made plastic base to form a ring with an inner diameter of 390 mm and axial length of 60 mm. The PET gantry was shielded with gold-plated conductive fabric tapes with a thickness of 0.1 mm. The charge signals of PET detector transferred via 4 m long flat cables were fed into the position decoder circuit. The flat cables were shielded with a mesh-type aluminum sheet with a thickness of 0.24 mm. The position decoder circuit and field programmable gate array-embedded DAQ modules were enclosed in an aluminum box with a thickness of 10 mm and located at the rear of the MR bore inside the MRI room. A 3-T human MRI system with a Larmor frequency of 123.7 MHz and inner bore diameter of 60 cm was used as the PET/MRI hybrid system. A custom-made radio frequency (RF) coil with an inner diameter of 25 cm was fabricated. The PET was positioned between gradient and the RF coils. PET performance was measured outside and inside the MRI scanner using echo planar imaging, spin echo, turbo spin echo, and gradient echo sequences. MRI performance was also evaluated with and without the PET insert. The stability of the newly developed PET insert was evaluated and simultaneous PET and MR images of a brain phantom were acquired. Results: No significant degradation of the PET performance caused by MR was observed when the PET was operated using various MR imaging sequences. The signal-to-noise ratio of MR images was slightly degraded due to the PET insert installed inside the MR bore while the homogeneity was

Development of PET/MRI with insertable PET for simultaneous PET and MR imaging of human brain

Energy Technology Data Exchange (ETDEWEB)

Jung, Jin Ho; Choi, Yong, E-mail: ychoi.image@gmail.com; Jung, Jiwoong; Kim, Sangsu; Lim, Hyun Keong; Im, Ki Chun [Department of Electronic Engineering, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 121-742 (Korea, Republic of); Oh, Chang Hyun; Park, Hyun-wook [Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701 (Korea, Republic of); Kim, Kyung Min; Kim, Jong Guk [Korea Institute of Radiological and Medical Science, 75 Nowon-ro, Nowon-gu, Seoul 139-709 (Korea, Republic of)

2015-05-15

Purpose: The purpose of this study was to develop a dual-modality positron emission tomography (PET)/magnetic resonance imaging (MRI) with insertable PET for simultaneous PET and MR imaging of the human brain. Methods: The PET detector block was composed of a 4 × 4 matrix of detector modules, each consisting of a 4 × 4 array LYSO coupled to a 4 × 4 Geiger-mode avalanche photodiode (GAPD) array. The PET insert consisted of 18 detector blocks, circularly mounted on a custom-made plastic base to form a ring with an inner diameter of 390 mm and axial length of 60 mm. The PET gantry was shielded with gold-plated conductive fabric tapes with a thickness of 0.1 mm. The charge signals of PET detector transferred via 4 m long flat cables were fed into the position decoder circuit. The flat cables were shielded with a mesh-type aluminum sheet with a thickness of 0.24 mm. The position decoder circuit and field programmable gate array-embedded DAQ modules were enclosed in an aluminum box with a thickness of 10 mm and located at the rear of the MR bore inside the MRI room. A 3-T human MRI system with a Larmor frequency of 123.7 MHz and inner bore diameter of 60 cm was used as the PET/MRI hybrid system. A custom-made radio frequency (RF) coil with an inner diameter of 25 cm was fabricated. The PET was positioned between gradient and the RF coils. PET performance was measured outside and inside the MRI scanner using echo planar imaging, spin echo, turbo spin echo, and gradient echo sequences. MRI performance was also evaluated with and without the PET insert. The stability of the newly developed PET insert was evaluated and simultaneous PET and MR images of a brain phantom were acquired. Results: No significant degradation of the PET performance caused by MR was observed when the PET was operated using various MR imaging sequences. The signal-to-noise ratio of MR images was slightly degraded due to the PET insert installed inside the MR bore while the homogeneity was

Evaluation of attenuation correction in cardiac PET using PET/MR.

Science.gov (United States)

Lau, Jeffrey M C; Laforest, R; Sotoudeh, H; Nie, X; Sharma, S; McConathy, J; Novak, E; Priatna, A; Gropler, R J; Woodard, P K

2017-06-01

Simultaneous acquisition Positron emission tomography/magnetic resonance (PET/MR) is a new technology that has potential as a tool both in research and clinical diagnosis. However, cardiac PET acquisition has not yet been validated using MR imaging for attenuation correction (AC). The goal of this study is to evaluate the feasibility of PET imaging using a standard 2-point Dixon volume interpolated breathhold examination (VIBE) MR sequence for AC. Evaluation was performed in both phantom and patient data. A chest phantom containing heart, lungs, and a lesion insert was scanned by both PET/MR and PET/CT. In addition, 30 patients underwent whole-body 18 F-fluorodeoxyglucose PET/CT followed by simultaneous cardiac PET/MR. Phantom study showed 3% reduction of activity values in the myocardium due to the non-inclusion of the phased array coil in the AC. In patient scans, average standardized uptake values (SUVs) obtained by PET/CT and PET/MR showed no significant difference (n = 30, 4.6 ± 3.5 vs 4.7 ± 2.8, P = 0.47). There was excellent per patient correlation between the values acquired by PET/CT and PET/MR (R 2  = 0.97). Myocardial SUVs PET imaging using MR for AC shows excellent correlation with myocardial SUVs obtained by standard PET/CT imaging. The 2-point Dixon VIBE MR technique can be used for AC in simultaneous PET/MR data acquisition.

Blogues de moda: a influência dos blogues no consumo de moda

OpenAIRE

Santos, Vânia Raquel Teixeira

2014-01-01

Dissertação apresentada à Escola Superior de Comunicação Social como parte dos requisitos para obtenção de grau de mestre em Publicidade e Marketing. A evolução das comunidades online e das redes sociais tem vindo a conferir cada vez mais poder ao consumidor. Os blogues têm vindo a assumir um protagonismo crescente no consumo. Este trabalho aborda o consumo de moda em blogues de moda, ou seja, o estudo dos blogues de moda como influenciadores do processo de consumo de moda. A propagação da...

RELAÇÕES VIRTUAIS DE CONSUMO: PERSPECTIVAS DE DIREITOS NO E-COMMERCE

OpenAIRE

Jensen, Vinicius de Souza; Ferreira, Vitor Hugo do Amaral

2012-01-01

O presente estudo perfaz uma abordagem crítica em face às relações de consumo atuais e a forma como interagem com a tecnologia. Sabe-se que o comércio eletrônico é um fenômeno recente e crescente decorrente da tecnologia da informação que evolui a passos largos. Neste enfoque, busca-se suprir as lacunas legislativas do Código de Defesa do Consumidor (CDC) quanto ao consumo virtual e estender a proteção aos consumidores virtuais. Neste contexto, importante a abordagem quanto ao consumo via int...

18F-FDG PET and PET/CT in Burkitt's lymphoma

International Nuclear Information System (INIS)

Karantanis, Dimitrios; Durski, Jolanta M.; Lowe, Val J.; Nathan, Mark A.; Mullan, Brian P.; Georgiou, Evangelos; Johnston, Patrick B.; Wiseman, Gregory A.

2010-01-01

Objective: To explore the value of 18 F fluorodeoxy-glucose (FDG) positron emission tomography (PET) in Burkitt's lymphoma. Methods: All Burkitt's lymphoma patients referred for FDG PET or FDG PET/computed tomography (CT) exams at our institution from June 2003 to June 2006 were included. Selected patients were followed and clinical information was reviewed retrospectively. Results from FDG PET-PET/CT, as blindly reviewed by a consensus of two experienced readers, were compared with the status of the disease as determined by other laboratory, clinical and imaging exams and clinical follow-up. FDG PET-PET/CT results were classified as true positive or negative and false positive or negative. The degree of FDG uptake in the positive lesions was semiquantified as maximum standard uptake value (SUVmax). Results: Fifty-seven FDG PET-PET/CT exams were done in 15 patients. Seven exams were done for initial staging, 8 during and 14 after the completion of therapy, and 28 for disease surveillance. For nodal disease FDG PET-PET/CT was true positive in 8, true negative in 47 and false positive in 2 exams (sensitivity 100%, specificity 96%). For extranodal disease FDG PET-PET/CT was true positive in 6, true negative in 48 and false positive in 3 exams (sensitivity 100%, specificity 94%). The mean SUVmax for the positive nodal lesions was 15.7 (range 6.9-21.7, median 18.5) and for extranodal lesions was 14.2 (range 6.2-24.3, median 12.4). Conclusions: FDG PET-PET/CT is sensitive for the detection of viable disease in Burkitt's lymphoma. Affected areas demonstrated high degree of uptake that was reversible upon successful implementation of treatment.

PET or PET-CT with cancer screening

International Nuclear Information System (INIS)

Wang Taisong; Zhao Jinhua; Song Jianhua

2007-01-01

At present, cancer screening remains a lot of debate in contemporary medical practice. Many constitutes have done a lot of experiments in cancer screening. The same version is that recommendations and decisions regarding cancer screening should be based on reliable data, not self- approbation. Now, some institutes advocate 18 F-FDG PET or 18 F-FDG PET-CT for cancer screening, here, discussed status quo, potential financial, radiation safety and statistical data in 18 F-FDG PET or 18 F-FDG PET- CT cancer screening. (authors)

PET / MRI vs. PET / CT. Indications Oncology

International Nuclear Information System (INIS)

Oliva González, Juan P.

2016-01-01

Hybrid techniques in Nuclear Medicine is currently a field in full development for diagnosis and treatment of various medical conditions. With the recent advent of PET / MRI much it speculated about whether or not it is superior to PET / CT especially in oncology. The Conference seeks to clarify this situation by dealing issues such as: State of the art technology PET / MRI; Indications Oncology; Some clinical cases. It concludes by explaining the oncological indications of both the real and current situation of the PET / MRI. (author)

Cultura y poder: el consumo de carne bovina en Colombia

Directory of Open Access Journals (Sweden)

Íngrid Johanna Bolívar

2005-04-01

Full Text Available El artículo presenta líneas de indagación para comprender cómo se construyó el consumo de carne de res como una práctica hegemónica en Colombia, especialmente en la primera mitad del siglo XX. El texto insiste en la necesidad de situar las preguntas por el consumo en un mapa amplio que permita ir más allá de las explicaciones económicas para entender las distintas racionalidades sociales, culturales y políticas implícitas en los diversos usos del ganado. Además, sugiere que la evolución del consumo de carne es inseparable del desarrollo de la economía cafetera y es funcional a las formas de diferenciación territorial y social que la acompañan.

CULTURA Y PODER: EL CONSUMO DE CARNE BOVINA EN COLOMBIA

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Íngrid Johanna Bolívar

2005-01-01

Full Text Available El artículo presenta líneas de indagación para comprender cómo se construyó el consumo de carne de res como una práctica hegemónica en Colombia, especialmente en la primera mitad del siglo XX. El texto insiste en la necesidad de situar las preguntas por el consumo en un mapa amplio que permita ir más allá de las explicaciones económicas para entender las distintas racionalidades sociales, culturales y políticas implícitas en los diversos usos del ganado. Además, sugiere que la evolución del consumo de carne es inseparable del desarrollo de la economía cafetera y es funcional a las formas de diferenciación territorial y social que la acompañan.

Application of PET and PET/CT imaging for cancer screening

International Nuclear Information System (INIS)

Chen Yenkung; Hu Fenglan; Shen Yehyou; Liao, A.C.; Hung, T.Z.; Su, Chentau; Chen Liangkuang

2004-01-01

The aim of this study was to evaluate the potential application of 18F-fluorodeoxyglucose (FDG) Positron Emission Tomography (PET) and PET/CT for cancer screening in asymptomatic individuals. Methods: The subjects consisted of 3631 physical check up examinees (1947 men, 1684 women; mean age ±SD, 52.1±8.2 y) with non-specific medical histories. Whole-body FDG PET (or PET/CT), ultrasound and tumor markers were performed on all patients. Focal hypermetabolic areas with intensities equal to or exceeding the level of FDG uptake in the brain and bladder were considered abnormal and interpreted as neoplasia. Follow-up periods were longer than one year. Results: Among the 3631 FDG PET (including 1687 PET/CT), ultrasound and tumor markers examinations, malignant tumors were discovered in 47 examinees (1.29%). PET findings were true-positive in 38 of the 47 cancers (80.9%). In addition, 32 of the 47 cancers were performed with the PET-CT scan. PET detected cancer lesions in 28 of the 32 examinees. However, the CT detected cancer lesions in only 15 of 32 examinees. Conclusion: The sensitivity of FDG PET in the detection of a wide variety of cancers is high. Most cancer can be detected with FDG PET in a resectable stage. CT of the PET/CT for localization and characteristics of the lesion shows an increased specificity of the PET scan. Using ultrasound and tumor markers may complement the PET scan in cancer screening for hepatic and urologic neoplasms. (authors)

PET/CT in lymphoma patients; PET-CT bei Lymphompatienten

Energy Technology Data Exchange (ETDEWEB)

Steinert, H.C. [Universitaetsspital Zuerich, Klinik und Poliklinik fuer Nuklearmedizin (Switzerland)

2004-11-01

First results of PET/CT in Hodgkin's disease (HD) and aggressive non-Hodgkin's lymphoma (NHL) are reported. From March 2001 to August 2004 822 PET/CT were performed at our clinic in lymphoma patients for primary staging, restaging after therapy, and diagnosis of recurrence. For coregistration non contrast-enhanced low-dose CT were used. Due to the exact anatomic localization of {sup 18}F-FDG accumulating lesions equivocal or false positive PET findings are avoided. In comparison to contrast enhanced CT, PET/CT has a higher sensitivity and specificity in patients with HD and aggressive NHL. Integration of PET/CT in treatment planning of radiation therapy optimizes the field volume. Even in the initial phase of clinical evaluation, PET/CT has proven useful in staging and restaging of lymphoma. The exact anatomic localization of the PET findings is essential for a precise report, for treatment planning of radiation therapy, and for planning surgical biopsy. (orig.) [German] Erste Ergebnisse der PET-CT bei Morbus Hodgkin (HD) und den aggressiven Non-Hodgkin-Lymphomen (NHL) werden beschrieben. Von Maerz 2001 bis August 2004 wurden 822 PET-CT bei Lymphompatienten zum primaeren Staging, zum Restaging nach Therapie und zur Rezidivdiagnostik an unserer Klinik durchgefuehrt. Fuer die Koregistration wurde ein Low-dose-CT ohne i.v.-Kontrastmittel verwendet. Durch die exakte anatomische Zuordnung der {sup 18}F-FDG aufnehmenden Laesionen wurden unklare oder falsch-positive PET-Befunde vermieden. Die PET-CT erzielte im Vergleich zur KM-verstaerkten CT eine hoehere Sensitivitaet und Spezifitaet bei Patienten mit HD und aggressiven NHL. Die Integration der PET-CT in die Planung der Strahlentherapie fuehrte zu einer Optimierung der Feldgrenzen. Die PET-CT hat sich bereits in der Phase der initialen klinischen Evaluation als wertvoll beim Staging und Restaging von Lymphomen erwiesen. Die exakte anatomische Zuordnung der PET-Informationen ist fuer eine sichere Befundung

Consumidora Consciente?! Paradoxos do Discurso do Consumo Sustentável de Moda

Directory of Open Access Journals (Sweden)

Adriana Tenório Cordeiro

2013-09-01

Full Text Available À medida que a questão ambiental se destaca nas agendas de discussão, bem como no repertório mercadológico, amplia-se a abrangência de questões relacionadas à necessidade não apenas de processos produtivos sustentáveis, mas também de um consumo “consciente”, “responsável” ou “sustentável” no segmento de moda. A responsabilização individual do consumidor de moda, quanto a problemas socioambientais é objeto de reflexão neste artigo. A partir de uma pesquisa exploratória qualitativa, no Pólo de Confecções do Agreste pernambucano, analisamos como problemáticas socioculturais e ambientais são (redescritas segundo uma (suposta prática “consciente” no consumo de moda. Para construção do corpus, consideramos a perspectiva de indivíduos em relação significativa com a prática sob investigação (o consumo de moda, tendo sido realizadas dez entrevistas em profundidade com jovens consumidoras locais de moda. Dados suplementares foram coletados, e incluíram fontes diversas, agrupadas e categorizadas após o trabalho de campo: artigos e conferências que versam sobre o consumo de moda (foco em vestuário; e matérias e notícias de jornais, revistas e internet que versavam sobre o consumo de moda no Agreste pernambucano, totalizando 70 artigos/matérias. Neste segmento, foi possível problematizar a relação entre inveja e felicidade como marcador importante, e a moda que funciona como parte dos recursos empregados pelo sujeito para construção identitária e reprodução cultural. Observam-se paradoxos de um consumo “ecologicamente correto” de moda, desmitificando-se a idéia de que o consumo “consciente” de moda é simplesmente uma questão de “escolha”. DOI: 10.5585/remark.v12i3.2413

Do carotid MR surface coils affect PET quantification in PET/MR imaging?

International Nuclear Information System (INIS)

Willemink, Martin J; Eldib, Mootaz; Leiner, Tim; Fayad, Zahi A; Mani, Venkatesh

2015-01-01

To evaluate the effect of surface coils for carotid MR imaging on PET quantification in a clinical simultaneous whole-body PET/MR scanner. A cylindrical phantom was filled with a homogeneous 2L water-FDG mixture at a starting dose of 301.2MBq. Clinical PET/MR and PET/CT systems were used to acquire PET-data without a coil (reference standard) and with two carotid MRI coils (Siemens Special Purpose 8-Channel and Machnet 4-Channel Phased Array). PET-signal attenuation was evaluated with Osirix using 51 (PET/MR) and 37 (PET/CT) circular ROIs. Mean and maximum standardized uptake values (SUVs) were quantified for each ROI. Furthermore, SUVs of PET/MR and PET/CT were compared. For validation, a patient was scanned with an injected dose of 407.7MBq on both a PET/CT and a PET/MR system without a coil and with both coils. PET/MR underestimations were -2.2% (Siemens) and -7.8% (Machnet) for SUVmean, and -1.2% (Siemens) and -3.3% (Machnet) for SUVmax, respectively. For PET/CT, underestimations were -1.3% (Siemens) and -1.4% (Machnet) for SUVmean and -0.5% (both Siemens and Machnet) for SUVmax, respectively using no coil data as reference. Except for PET/CT SUVmax values all differences were significant. SUVs differed significantly between PET/MR and PET/CT with SUVmean values of 0.51-0.55 for PET/MR and 0.68-0.69 for PET/CT, respectively. The patient examination showed that median SUVmean values measured in the carotid arteries decreased from 0.97 without a coil to 0.96 (Siemens) and 0.88 (Machnet). Carotid surface coils do affect attenuation correction in both PET/MR and PET/CT imaging. Furthermore, SUVs differed significantly between PET/MR and PET/CT.

Adolescencia, consumo de sustancias y demanda terapéutica

OpenAIRE

Fernandez Raone, Martina

2017-01-01

Esta tesis se propone desarrollar la articulación entre adolescencia, consumo de sustancias y demanda terapéutica en un hospital especializado en drogodependencias y alcoholismo. A tal fin parte de la pregunta ¿Por qué el consumo y la adicción a diferentes tipos sustancias tóxicas se inician en general en la adolescencia y qué particularidades y dificultades se encuentran en la demanda terapéutica por adicciones en una institución asistencial para abordar estas presentaciones desde una perspe...

Evaluation of the PET component of simultaneous [18F]choline PET/MRI in prostate cancer: comparison with [18F]choline PET/CT

International Nuclear Information System (INIS)

Wetter, Axel; Lipponer, Christine; Nensa, Felix; Altenbernd, Jens-Christian; Schlosser, Thomas; Lauenstein, Thomas; Heusch, Philipp; Ruebben, Herbert; Bockisch, Andreas; Poeppel, Thorsten; Nagarajah, James

2014-01-01

The aim of this study was to evaluate the positron emission tomography (PET) component of [ 18 F]choline PET/MRI and compare it with the PET component of [ 18 F]choline PET/CT in patients with histologically proven prostate cancer and suspected recurrent prostate cancer. Thirty-six patients were examined with simultaneous [ 18 F]choline PET/MRI following combined [ 18 F]choline PET/CT. Fifty-eight PET-positive lesions in PET/CT and PET/MRI were evaluated by measuring the maximum and mean standardized uptake values (SUV max and SUV mean ) using volume of interest (VOI) analysis. A scoring system was applied to determine the quality of the PET images of both PET/CT and PET/MRI. Agreement between PET/CT and PET/MRI regarding SUV max and SUV mean was tested using Pearson's product-moment correlation and Bland-Altman analysis. All PET-positive lesions that were visible on PET/CT were also detectable on PET/MRI. The quality of the PET images was comparable in both groups. Median SUV max and SUV mean of all lesions were significantly lower in PET/MRI than in PET/CT (5.2 vs 6.1, p max of PET/CT and PET/MRI (R = 0.86, p mean of PET/CT and PET/MRI (R = 0.81, p max of PET/CT vs PET/MRI and -1.12 to +2.23 between SUV mean of PET/CT vs PET/MRI. PET image quality of PET/MRI was comparable to that of PET/CT. A highly significant correlation between SUV max and SUV mean was found. Both SUV max and SUV mean were significantly lower in [ 18 F]choline PET/MRI than in [ 18 F]choline PET/CT. Differences of SUV max and SUV mean might be caused by different techniques of attenuation correction. Furthermore, differences in biodistribution and biokinetics of [ 18 F]choline between the subsequent examinations and in the respective organ systems have to be taken into account. (orig.)

Adolescentes costarricenses con problemas judiciales y consumo de drogas

Directory of Open Access Journals (Sweden)

Sandra Fonseca-Chaves

2012-12-01

Full Text Available El objetivo de este estudio fue determinar los niveles de consumo de drogas y su relación con la comisión de delitos en una muestra de jóvenes, en su mayoría hombres, de entre 12 y 17 años de edad en un centro de detención juvenil de Costa Rica (Centro de Formación Juvenil Zurquí en los años 2006 al 2008. Un técnico capacitado realizó las entrevistas mediante un cuestionario estándar diseñado por la Comisión Interamericana para el Control de Abuso de Drogas de la Organización de Estados Americanos (CICAD/OEA utilizado en varios países de América Latina. El cuestionario preguntó a los jóvenes acerca de su situación sociodemográfica, los períodos anteriores y actuales de detención, los antecedentes penales, los patrones de uso de varias categorías de drogas, edad de inicio, la presión social, la contención familiar, la percepción y el conocimiento y la información en relación con el consumo de drogas. Los jóvenes entrevistados reportaron mayor consumo de alcohol, tabaco y una variedad de drogas ilícitas y en la mayoría de ellos había una estrecha relación entre el consumo de drogas y el delito. Mientras que la relación entre el abuso de sustancias y la comisión del delito no es bien conocida, la evidencia disponible sugiere que el consumo de sustancias exacerba el delito y preceden a ello, debido a las condiciones sociales y económicas, así como otros factores de la familia/comunidad. Además, el estudio encuentra que los infractores tienden a comenzar a experimentar con sustancias a edades más tempranas, que los no infractores.

[Principles of PET].

Science.gov (United States)

Beuthien-Baumann, B

2018-05-01

Positron emission tomography (PET) is a procedure in nuclear medicine, which is applied predominantly in oncological diagnostics. In the form of modern hybrid machines, such as PET computed tomography (PET/CT) and PET magnetic resonance imaging (PET/MRI) it has found wide acceptance and availability. The PET procedure is more than just another imaging technique, but a functional method with the capability for quantification in addition to the distribution pattern of the radiopharmaceutical, the results of which are used for therapeutic decisions. A profound knowledge of the principles of PET including the correct indications, patient preparation, and possible artifacts is mandatory for the correct interpretation of PET results.

Evaluation of Dixon Sequence on Hybrid PET/MR Compared with Contrast-Enhanced PET/CT for PET-Positive Lesions

International Nuclear Information System (INIS)

Jeong, Ju Hye; Cho, Ihn Ho; Kong, Eun Jung; Chun, Kyung Ah

2014-01-01

Hybrid positron emission tomography and magnetic resonance (PET/MR) imaging performs a two-point Dixon MR sequence for attenuation correction. However, MR data in hybrid PET/MR should provide anatomic and morphologic information as well as an attenuation map. We evaluated the Dixon sequence of hybrid PET/MR for anatomic correlation of PET-positive lesions compared with contrast-enhanced PET/computed tomography (CT) in patients with oncologic diseases. Twelve patients underwent a single injection, dual imaging protocol. PET/CT was performed with an intravenous contrast agent (85±13 min after 18 F-FDG injection of 403± 45 MBq) and then (125±19 min after injection) PET/MR was performed. Attenuation correction and anatomic allocation of PET were performed using contrast-enhanced CT for PET/CT and Dixon MR sequence for hybrid PET/MR. The Dixon MR sequence and contrast-enhanced CT were compared for anatomic correlation of PET-positive lesions (scoring scale ranging from 0 to 3 for visual ratings). Additionally, standardized uptake values (SUVs) for the detected lesions were assessed for quantitative comparison. Both hybrid PET/MR and contrast-enhanced PET/CT identified 55 lesions with increased FDG uptake in ten patients. In total, 28 lymph nodes, 11 bone lesions, 3 dermal nodules, 3 pleural thickening lesions, 2 thyroid nodules, 1 pancreas, 1 liver, 1 ovary, 1 uterus, 1 breast, 1 soft tissue and 2 lung lesions were present. The best performance was observed for anatomic correlation of PET findings by the contrast-enhanced CT scans (contrast-enhanced CT, 2.64± 0.70; in-phase, 1.29±1.01; opposed-phase, 1.29±1.15; water-weighted, 1.71±1.07; fat weighted, 0.56±1.03). A significant difference was observed between the scores obtained from the contrast-enhanced CT and all four coregistered Dixon MR images. Quantitative evaluation revealed a high correlation between the SUVs measured with hybrid PET/MR (SUVmean, 2.63±1.62; SUVmax, 4.30±2.88) and contrast-enhanced PET

Evaluation of Dixon Sequence on Hybrid PET/MR Compared with Contrast-Enhanced PET/CT for PET-Positive Lesions

Energy Technology Data Exchange (ETDEWEB)

Jeong, Ju Hye; Cho, Ihn Ho; Kong, Eun Jung; Chun, Kyung Ah [Yeungnam Univ. Hospital, Daegu (Korea, Republic of)

2014-03-15

Hybrid positron emission tomography and magnetic resonance (PET/MR) imaging performs a two-point Dixon MR sequence for attenuation correction. However, MR data in hybrid PET/MR should provide anatomic and morphologic information as well as an attenuation map. We evaluated the Dixon sequence of hybrid PET/MR for anatomic correlation of PET-positive lesions compared with contrast-enhanced PET/computed tomography (CT) in patients with oncologic diseases. Twelve patients underwent a single injection, dual imaging protocol. PET/CT was performed with an intravenous contrast agent (85±13 min after {sup 18}F-FDG injection of 403± 45 MBq) and then (125±19 min after injection) PET/MR was performed. Attenuation correction and anatomic allocation of PET were performed using contrast-enhanced CT for PET/CT and Dixon MR sequence for hybrid PET/MR. The Dixon MR sequence and contrast-enhanced CT were compared for anatomic correlation of PET-positive lesions (scoring scale ranging from 0 to 3 for visual ratings). Additionally, standardized uptake values (SUVs) for the detected lesions were assessed for quantitative comparison. Both hybrid PET/MR and contrast-enhanced PET/CT identified 55 lesions with increased FDG uptake in ten patients. In total, 28 lymph nodes, 11 bone lesions, 3 dermal nodules, 3 pleural thickening lesions, 2 thyroid nodules, 1 pancreas, 1 liver, 1 ovary, 1 uterus, 1 breast, 1 soft tissue and 2 lung lesions were present. The best performance was observed for anatomic correlation of PET findings by the contrast-enhanced CT scans (contrast-enhanced CT, 2.64± 0.70; in-phase, 1.29±1.01; opposed-phase, 1.29±1.15; water-weighted, 1.71±1.07; fat weighted, 0.56±1.03). A significant difference was observed between the scores obtained from the contrast-enhanced CT and all four coregistered Dixon MR images. Quantitative evaluation revealed a high correlation between the SUVs measured with hybrid PET/MR (SUVmean, 2.63±1.62; SUVmax, 4.30±2.88) and contrast

Norma percibida de consumo de marihuana en los pares de estudiantes universitarios Norma percebida de consumo de maconha sobre os pares de estudantes universitários Perceived norm for marijuana use among university student peers

Directory of Open Access Journals (Sweden)

Angélica Cazenave

2009-01-01

Full Text Available En este estudio se describe la relación entre la norma percibida del consumo de marihuana en los pares y el consumo real informado por alumnos de una universidad chilena. Se trata de un estudio cuantitativo, multicéntrico y transversal. Participaron 449 estudiantes previa firma del consentimiento informado. La información se recolectó con un cuestionario autoaplicado y se analizó con el programa SPSS 15.0. Fue encontrado que la mayoría son mujeres solteras, entre 20 y 21 años de edad, estudiantes de enfermería y educación. La norma percibida fue mayor que la de estudios nacionales (32,1% versus 21%; también el consumo autoinformado fue mayor que el nacional (32,1% versus 5,6%. Se observa un mayor consumo entre las mujeres, en educación y enfermería. Se confirma la feminización del consumo; el inicio del consumo en la universidad, el uso recreativo y la mayor tolerancia al consumo en los pares. Existe una sobreestimación del consumo de marihuana, lo que de acuerdo a la Teoría de las Normas Sociales y de Normalización influye en el aumento del consumo. Esta investigación constituye un aporte a las políticas de la salud del país y de la universidad.Descreve-se, aqui, a relação entre norma percebida de consumo de maconha entre os pares e consumo reportado em alunos de uma universidade chilena. Este é um estudo quantitativo, multicêntrico, transversal. Participaram 449 estudantes, com livre consentimento. As informações foram coletadas mediante questionário autoaplicado e analisadas através do programa SPSS 15.0. RESULTADOS: a maioria são mulheres, solteiras, entre 20 e 21 anos, estudantes de enfermagem e educação. A norma percebida é maior do que nos estudos nacionais (32,1% vs 21% e maior do que o consumo autorreportado (32,1% vs 5,6%. Observa-se maior consumo nas mulheres, e dos cursos de educação e de enfermagem. Confirma-se a feminização do consumo, o qual se inicia na universidade, por uso recreativo, e haver

Patrones de consumo de carne en el noroeste de México

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Cristina Taddei

2012-01-01

Full Text Available En gran medida, el conocimiento de la forma en la que se comporta el consumidor determina el desempeño en el mercado de un producto determinado. Se utiliza un algoritmo de agrupamiento de datos, en el marco del reconocimiento de patrones, para identificar tipos de consumidores de carne en el noroeste de México, con el objetivo de conocer las preferencias de consumo y con ello orientar decisiones de mercado por parte de los productores o bien de funcionarios responsables de políticas de fomento en sectores involucrados. El análisis de datos permitió encontrar tres tipos de consumidores de carne: 1 aquellos que tienen preferencia alta por el consumo de carne de res y carnes blancas como pollo y pescado, 2 los que muestran preferencia alta por carne de res, seguida por carne de pollo y de puerco y 3 quienes prefieren el consumo de carnes blancas como pollo y pescado y tienen muy escasa preferencia por el consumo de carne de res. Es a partir de estos grupos que se describen algunas características del mercado de carnes en la región de estudio.

Baixa Renda: O Consumo Simbólico e o Comércio Informal de Acessórios Femininos

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Elisângela Domingues Michelatto Natt

2017-01-01

Full Text Available Para compreender mais do universo do consumo simbólico, foi realizada uma pesquisa sobre o consumo de acessórios femininos por mulheres de baixa renda. As participantes foram revendedoras ambulantes e suas clientes. Sob a perspectiva do consumo simbólico foi possível observar alguns aspectos comuns ao consumo dessa classe de mulheres que recorrem às suas experiências de consumo para relacionar-se no universo social e marcar sua presença nele. Em termos gerenciais essa pesquisa se faz importante porque apresenta algumas peculiaridades desse processo de consumo, revelando informações que podem contribuir para a avaliação das estratégias de mercado.

Helminthic Infection and Nutritional Studies among Orang Asli Children in Sekolah Kebangsaan Pos Legap, Perak.

Science.gov (United States)

Wong, Weng Kin; Foo, Phiaw Chong; Roze, Mohamad Noor Mohamad; Pim, Chau Dam; Subramaniam, Puvaneswari; Lim, Boon Huat

2016-01-01

Background. Orang Asli (aborigine) children are susceptible to soil-transmitted helminth (STH) infections due to their lifestyle and substandard sanitation system. Objectives. This study aimed to examine the helminthic and nutritional status of Orang Asli school children in Sekolah Kebangsaan Pos Legap, a remote primary school at Kuala Kangsar District in the state of Perak, Malaysia. In addition, the sensitivities of four STH stool examination techniques were also compared. Methods. Demography and anthropometry data were collected by one-to-one interview session. Collected stools were examined with four microscopy techniques, namely, direct wet mount, formalin ether concentration (FEC), Kato-Katz (KK), and Parasep™. Results. Anthropometry analysis showed that 78% (26/33) of children in SK Pos Legap were malnourished and 33% (11/33) of them were stunted. Stool examinations revealed almost all children (97%) were infected by either one of the three commonest STHs. FEC was the most sensitive method in detection of the three helminth species. Conclusion. This study revealed that STH infections and nutritional status still remain a health concern among the Orang Asli children. These communal problems could be effectively controlled by regular monitoring of STH infection loads, administration of effective antihelminthic drug regimen, and also implementation of effective school nutritional programs.

Baixa Renda: O Consumo Simbólico e o Comércio Informal de Acessórios Femininos

OpenAIRE

Elisângela Domingues Michelatto Natt; Bruna Fernanda Barbosa; Francisco Giovanni David Vieira; Alexandre de Pádua Carrieri

2017-01-01

Para compreender mais do universo do consumo simbólico, foi realizada uma pesquisa sobre o consumo de acessórios femininos por mulheres de baixa renda. As participantes foram revendedoras ambulantes e suas clientes. Sob a perspectiva do consumo simbólico foi possível observar alguns aspectos comuns ao consumo dessa classe de mulheres que recorrem às suas experiências de consumo para relacionar-se no universo social e marcar sua presença nele. Em termos gerenciais essa pesquisa se faz importan...

Consumo de música : os social media e os serviços de streaming

OpenAIRE

Nunes, Luís Filipe da Mata

2015-01-01

Mestrado em Marketing A indústria da música obteve, durante décadas, lucros multimilionários do consumo de cópias físicas de obras musicais e não do consumo de música em si, uma vez que o consumo não implica a compra de música. No início deste século, o desenvolvimento de novas tecnologias e estratégias de distribuição e promoção de conteúdos, contribuiu para uma transformação tremenda da indústria de música e dos hábitos de consumo. Atualmente, as vendas de cópias físicas e de downloads l...

Lung PET scan

Science.gov (United States)

... Chest PET scan; Lung positron emission tomography; PET - chest; PET - lung; PET - tumor imaging; ... Grainger & Allison's Diagnostic Radiology: A Textbook of Medical Imaging . 6th ed. Philadelphia, ...

Factores predictores del consumo de tabaco entre adolescentes del Colegio Universitario Santiago de Cali, 2005

Directory of Open Access Journals (Sweden)

Yamileth Ortiz-Gómez

2009-01-01

Resultados: La prevalencia del consumo fue 40,5% [IC: 34,8-46,4]. En los tres modelos, el consumo de amigos tuvo un OR 2,31, IC 95% [1,06-5,04]; el fumar si un amigo se lo brinda, presentó un OR 7,45, [IC 95% 3,9-14,0] y la exposición al humo de cigarrillo explican el consumo de tabaco con un OR 2,18, [IC 95% 1,23-3,87]; Test Hosmer-Lemeshow, Ji2=10,6 y P=0,2253. Conclusión: En este grupo de adolescentes solo los amigos se encontraron como posibles predictores del consumo de tabaco; aunque hubo cierto consumo por parte de los padres, no fue estadísticamente significativo, pero sí lo fue para la exposición al humo fuera del hogar. No hubo asociación con alcohol o sustancias psicoactivas.

El proyecto "campana educativa para incrementar el consumo de frijoles"

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Ligia Rodr\\u00EDguez

2004-01-01

Full Text Available El proyecto “Campaña educativa para incrementar el consumo de frijoles”. Se describen las diferentes etapas que se siguen en el desarrollo de un proyecto denominado “Campaña educativa para incrementar el consumo de frijoles”. La Campaña tuvo como objetivo “incrementar el consumo de frijoles en la población urbana de clase media de Costa Rica” y contribuir a contrarrestar la disminución en el consumo de este alimento, que se ha presentado en forma muy marcada en el área urbana. El artículo pretende ofrecer una visión global del mencionado proyecto, de manera que le permita al lector la ubicación dentro del proceso, al mismo tiempo que lo refiere a los artículos específicos que ofrecen el detalle de las diferentes etapas y resultados. La metodología describe las características generales del abordaje que se utiliza y la forma en que se desarrolla cada una de las etapas. Los resultados sumarizan los hallazgos de la evaluación y otros aspectos globales del proyecto. Además, ofrece pautas para un abordaje de la educación nutricional focalizada alrededor de un alimento y sustentada en la realidad social y cultural de la población.

Simultaneous PET/MRI with 13C magnetic resonance spectroscopic imaging (hyperPET): phantom-based evaluation of PET quantification

DEFF Research Database (Denmark)

Hansen, Adam E.; Andersen, Flemming L.; Henriksen, Sarah T.

2016-01-01

Background: Integrated PET/MRI with hyperpolarized 13C magnetic resonance spectroscopic imaging (13C-MRSI) offers simultaneous, dual-modality metabolic imaging. A prerequisite for the use of simultaneous imaging is the absence of interference between the two modalities. This has been documented...... for a clinical whole-body system using simultaneous 1 H-MRI and PET but never for 13C-MRSI and PET. Here, the feasibility of simultaneous PET and 13C-MRSI as well as hyperpolarized 13C-MRSI in an integrated whole-body PET/MRI hybrid scanner is evaluated using phantom experiments. Methods: Combined PET and 13C......-MRSI phantoms including a NEMA [18F]-FDG phantom, 13C-acetate and 13C-urea sources, and hyperpolarized 13C-pyruvate were imaged repeatedly with PET and/or 13C-MRSI. Measurements evaluated for interference effects included PET activity values in the largest sphere and a background region; total number of PET...

Positron Emission Tomography (PET)

International Nuclear Information System (INIS)

Welch, M.J.

1990-01-01

Positron emission tomography (PET) assesses biochemical processes in the living subject, producing images of function rather than form. Using PET, physicians are able to obtain not the anatomical information provided by other medical imaging techniques, but pictures of physiological activity. In metaphoric terms, traditional imaging methods supply a map of the body's roadways, its, anatomy; PET shows the traffic along those paths, its biochemistry. This document discusses the principles of PET, the radiopharmaceuticals in PET, PET research, clinical applications of PET, the cost of PET, training of individuals for PET, the role of the United States Department of Energy in PET, and the futures of PET. 22 figs

Positron Emission Tomography (PET)

Science.gov (United States)

Welch, M. J.

1990-01-01

Positron emission tomography (PET) assesses biochemical processes in the living subject, producing images of function rather than form. Using PET, physicians are able to obtain not the anatomical information provided by other medical imaging techniques, but pictures of physiological activity. In metaphoric terms, traditional imaging methods supply a map of the body's roadways, its, anatomy; PET shows the traffic along those paths, its biochemistry. This document discusses the principles of PET, the radiopharmaceuticals in PET, PET research, clinical applications of PET, the cost of PET, training of individuals for PET, the role of the United States Department of Energy in PET, and the futures of PET.

Positron Emission Tomography (PET)

Energy Technology Data Exchange (ETDEWEB)

Welch, M.J.

1990-01-01

Positron emission tomography (PET) assesses biochemical processes in the living subject, producing images of function rather than form. Using PET, physicians are able to obtain not the anatomical information provided by other medical imaging techniques, but pictures of physiological activity. In metaphoric terms, traditional imaging methods supply a map of the body's roadways, its, anatomy; PET shows the traffic along those paths, its biochemistry. This document discusses the principles of PET, the radiopharmaceuticals in PET, PET research, clinical applications of PET, the cost of PET, training of individuals for PET, the role of the United States Department of Energy in PET, and the futures of PET. 22 figs.

Indeterminate findings on oncologic PET/CT: What difference dose PET/MRI make?

Energy Technology Data Exchange (ETDEWEB)

Fraum, Tyler J.; Fowler, Kathryn J.; McConathy, Jonathan; Dehdashti, Farokh [Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis (United States)

2016-12-15

Positron emission tomography/computed tomography (PET/CT) with 2-deoxy-2-[{sup 18}F]fluoro-D-glucose (FDG) has become the standard of care for the initial staging and subsequent treatment response assessment of many different malignancies. Despite this success, PET/CT is often supplemented by MRI to improve assessment of local tumor invasion and to facilitate detection of lesions in organs with high background FDG uptake. Consequently, PET/MRI has the potential to expand the clinical value of PET examinations by increasing reader certainty and reducing the need for subsequent imaging. This study evaluates the ability of FDG-PET/MRI to clarify findings initially deemed indeterminate on clinical FDG-PET/CT studies. A total of 190 oncology patients underwent whole-body PET/CT, immediately followed by PET/MRI utilizing the same FDG administration. Each PET/CT was interpreted by our institution's nuclear medicine service as a standard-of-care clinical examination. Review of these PET/CT reports identified 31 patients (16 %) with indeterminate findings. Two readers evaluated all 31 PET/CT studies, followed by the corresponding PET/MRI studies. A consensus was reached for each case, and changes in interpretation directly resulting from PET/MRI review were recorded. Interpretations were then correlated with follow-up imaging, pathology results, and other diagnostic studies. In 18 of 31 cases with indeterminate findings on PET/CT, PET/MRI resulted in a more definitive interpretation by facilitating the differentiation of infection/inflammation from malignancy (15/18), the accurate localization of FDG-avid lesions (2/18), and the characterization of incidental non-FDG-avid solid organ lesions (1/18). Explanations for improved reader certainty with PET/MRI included the superior soft tissue contrast of MRI and the ability to assess cellular density with diffusion-weighted imaging. The majority (12/18) of such cases had an appropriate standard of reference; in all 12 cases

Indeterminate findings on oncologic PET/CT: What difference dose PET/MRI make?

International Nuclear Information System (INIS)

Fraum, Tyler J.; Fowler, Kathryn J.; McConathy, Jonathan; Dehdashti, Farokh

2016-01-01

Positron emission tomography/computed tomography (PET/CT) with 2-deoxy-2-["1"8F]fluoro-D-glucose (FDG) has become the standard of care for the initial staging and subsequent treatment response assessment of many different malignancies. Despite this success, PET/CT is often supplemented by MRI to improve assessment of local tumor invasion and to facilitate detection of lesions in organs with high background FDG uptake. Consequently, PET/MRI has the potential to expand the clinical value of PET examinations by increasing reader certainty and reducing the need for subsequent imaging. This study evaluates the ability of FDG-PET/MRI to clarify findings initially deemed indeterminate on clinical FDG-PET/CT studies. A total of 190 oncology patients underwent whole-body PET/CT, immediately followed by PET/MRI utilizing the same FDG administration. Each PET/CT was interpreted by our institution's nuclear medicine service as a standard-of-care clinical examination. Review of these PET/CT reports identified 31 patients (16 %) with indeterminate findings. Two readers evaluated all 31 PET/CT studies, followed by the corresponding PET/MRI studies. A consensus was reached for each case, and changes in interpretation directly resulting from PET/MRI review were recorded. Interpretations were then correlated with follow-up imaging, pathology results, and other diagnostic studies. In 18 of 31 cases with indeterminate findings on PET/CT, PET/MRI resulted in a more definitive interpretation by facilitating the differentiation of infection/inflammation from malignancy (15/18), the accurate localization of FDG-avid lesions (2/18), and the characterization of incidental non-FDG-avid solid organ lesions (1/18). Explanations for improved reader certainty with PET/MRI included the superior soft tissue contrast of MRI and the ability to assess cellular density with diffusion-weighted imaging. The majority (12/18) of such cases had an appropriate standard of reference; in all 12 cases, the

O consumo alimentar de gestantes adolescentes no Município do Rio de Janeiro

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Barros Denise Cavalcante de

2004-01-01

Full Text Available O crescimento da gravidez na adolescência é visto com preocupação pela área de saúde pública. O consumo de alimentos que atendam a alta demanda de nutrientes durante a gestação tem sido identificado como um componente relevante. O objetivo do estudo foi conhecer o consumo habitual dos alimentos e de energia e nutrientes entre gestantes adolescentes. Foram entrevistadas 1.180 mães adolescentes em maternidades do Município de Rio de Janeiro e aplicado um Questionário de Freqüência de Consumo Alimentar semiquantitativo simplificado. Os alimentos referidos por pelo menos 50% delas foram arroz, açúcar, manteiga, pão, feijão, leite, refrigerante, sucos, legumes e laranja. Observa-se um menor consumo de sucos, legumes e frutas entre as menores de 15 anos. No primeiro quartil de consumo, a ingestão mínima recomendada de energia, ferro, folato, vitamina C e cálcio não foi alcançada. Encontrou-se uma associação inversa entre o número de pessoas no domicílio e o consumo de energia e nutrientes. O relato de informação sobre alimentação no pré-natal e a informação de mudança de alimentação durante a gravidez esteve associado a um melhor consumo de energia e nutrientes. A atenção pré-natal mostrou-se como um cuidado fundamental para melhores resultados na gestação.

PET and PET/CT in tumour of undetermined origin; PET y PET/CT en tumor de origen indeterminado

Energy Technology Data Exchange (ETDEWEB)

Garcia O, J R [Nuclear Medicine and Molecular Imaging, PET/CT, Centro Medico ABC, Mexico D.F. (Mexico)

2007-07-01

In this presentation the following conclusions were obtained regarding the use of PET and PET/CT in patient with cancer of unknown primary: 1. Detection of the primary one in 1/3 at 1/2 of patient. 2. It detects metastases in other places in 50%. 3. It changes the initial therapy planned in 1/3 at 1/2 of patient. 4. Useful in initial phases of protocol study to limit the other procedures. After standard evaluation. Before advanced protocol. 5. PET/CT study increases the % of primary detection, although in a non significant way vs. PET. 6. They are required more studies to value their utility to a more objective manner. (Author)

The Scattering of Slow Neutrons from Hydrogen and Ethylene; Diffusion des neutrons lents par l'hydrogene et par l'ethylene; O rasseyanii medlennykh nejtronov vodorodom i ehtilenom; Dispersion de neutrones lentos por hidrogeno y etileno

Energy Technology Data Exchange (ETDEWEB)

Bally, D; Tarina, V; Todireanu, S [Institute of Atomic Physics, Bucharest (Romania)

1963-01-15

The angular distribution of 1.61 A wavelength neutrons scattered from hydrogen and ethylene has been measured. For ethylene the pressure was varied from 15 to 60 atm and for hydrogen from 60 to 110 atm. The investigated angular range was between 5''o and 90{sup o}. The experimental results obtained have been compared with the differential cross-section calculated using the Krieger-Nelkin formulae. (author) [French] Les auteurs ont mesure la distribution angulaire des neutrons ayant une longueur d'onde de 1,61 A diffuses par de l'hydrogene et par l'ethylene. Ils ont fait varier la pression de l'ethylene de 15 a 60 atm et celle de l'hydrogene de 60 a 110 atm. Le domaine angulaire etudie etait compris entre 5{sup o} et 90{sup o}. Les resultats des experiences ont ete compares aux sections efficaces differentielles calculees au moyen des formules de Krieger-Nelkin. (author) [Spanish] Los autores han medido la distribucion angular de neutrones de longitud de onda igual a 1,61 A, despersados por hidrogeno y etileno. En el caso del etileno, la presion vario de 15 a 60 atm y en el del higrogeno, de 60 a 110 atm. Los autores han explorado angulos comprendidos entre 5{sup o} y 90{sup o}. comparan los resultados experimentales obtenidos con el valor de la seccion eficaz diferencial calculado con ayuda de las formulas de Kriger-Nelkin. (author)

Fatores associados ao consumo de frutas e hortaliças no Brasil, 2006 Factores asociados al consumo de frutas y hortalizas en Brasil, 2006 Factors associated with fruit and vegetable consumption in Brazil, 2006

Directory of Open Access Journals (Sweden)

Patricia Constante Jaime

2009-11-01

Full Text Available OBJETIVO: Estimar a freqüência do consumo de frutas e hortaliças e fatores associados. MÉTODOS: Foram estudados 54.369 indivíduos com idade >18 anos, entrevistados pelo sistema de Vigilância de Fatores de Risco e Proteção para Doenças Crônicas por Inquérito Telefônico (VIGITEL nas capitais brasileiras e Distrito Federal, em 2006. Os indicadores do consumo alimentar foram: consumo regular (>5 dias/semana de frutas e hortaliças e consumo adequado (>5 vezes/dia. Calculou-se a prevalência dos indicadores e intervalos de confiança, estratificada por sexo. Para analisar a associação das variáveis sociodemográficas foram calculados odds ratio bruta e ajustada por sexo, idade, escolaridade e estado civil. RESULTADOS: Menos da metade dos indivíduos referiu consumo regular de fruta (44,1% ou hortaliças (43,8%, enquanto 23,9% referiram consumo regular de frutas e hortaliças em conjunto; o consumo adequado foi referido por 7,3% dos entrevistados. O consumo de frutas e hortaliças variou entre as cidades estudadas, foi maior entre as mulheres e aumentou com a idade e escolaridade. CONCLUSÕES: Iniciativas de promoção do consumo de frutas e hortaliças devem atender a população como um todo, especialmente às cidades das regiões Norte e Nordeste, aos jovens, aos homens e aos estratos populacionais com baixa escolaridade.OBJETIVO: Estimar la frecuencia de consumo de frutas y hortalizas y factores asociados. MÉTODOS: Fueron estudiados 54.369 individuos con edad >18 años, entrevistados por el Sistema de Vigilancia de Factores de Riesgo y Protección para Enfermedades Crónicas por Pesquisa Telefónica (VIGITEL en las capitales brasileras y Distrito Federal, en 2006. Los indicadores de consumo alimentario fueron: consumo regular (>5 días/semana de frutas y hortalizas y consumo adecuado (>5 veces/día. Se calculó la prevalencia de los indicadores e intervalos de confianza, estratificada por sexo. Para analizar la asociación de las

Análise dos fatores que influenciam o consumo de água mineral

OpenAIRE

Pitaluga, Christiane Marques

2006-01-01

A água mineral foi o produto que mais apresentou crescimento em consumo entre as famílias brasileiras nos últimos trinta anos, ultrapassando 0,320 litros per capita/ano em 1974/1975 e alcançando a marca de 18,541 litros em 2002/2003. Dentre os produtos de maior consumo alimentar, somente o leite fica à frente da água mineral. No ambito mundial, o consumo de água envasada continuará crescendo nos próximos anos, passando de um volume de 155 bilhões de litros em 2003 para 206 bilhões em 2008, se...

Simultaneous PET/MRI with (13)C magnetic resonance spectroscopic imaging (hyperPET): phantom-based evaluation of PET quantification.

Science.gov (United States)

Hansen, Adam E; Andersen, Flemming L; Henriksen, Sarah T; Vignaud, Alexandre; Ardenkjaer-Larsen, Jan H; Højgaard, Liselotte; Kjaer, Andreas; Klausen, Thomas L

2016-12-01

Integrated PET/MRI with hyperpolarized (13)C magnetic resonance spectroscopic imaging ((13)C-MRSI) offers simultaneous, dual-modality metabolic imaging. A prerequisite for the use of simultaneous imaging is the absence of interference between the two modalities. This has been documented for a clinical whole-body system using simultaneous (1)H-MRI and PET but never for (13)C-MRSI and PET. Here, the feasibility of simultaneous PET and (13)C-MRSI as well as hyperpolarized (13)C-MRSI in an integrated whole-body PET/MRI hybrid scanner is evaluated using phantom experiments. Combined PET and (13)C-MRSI phantoms including a NEMA [(18)F]-FDG phantom, (13)C-acetate and (13)C-urea sources, and hyperpolarized (13)C-pyruvate were imaged repeatedly with PET and/or (13)C-MRSI. Measurements evaluated for interference effects included PET activity values in the largest sphere and a background region; total number of PET trues; and (13)C-MRSI signal-to-noise ratio (SNR) for urea and acetate phantoms. Differences between measurement conditions were evaluated using t tests. PET and (13)C-MRSI data acquisition could be performed simultaneously without any discernible artifacts. The average difference in PET activity between acquisitions with and without simultaneous (13)C-MRSI was 0.83 (largest sphere) and -0.76 % (background). The average difference in net trues was -0.01 %. The average difference in (13)C-MRSI SNR between acquisitions with and without simultaneous PET ranged from -2.28 to 1.21 % for all phantoms and measurement conditions. No differences were significant. The system was capable of (13)C-MRSI of hyperpolarized (13)C-pyruvate. Simultaneous PET and (13)C-MRSI in an integrated whole-body PET/MRI hybrid scanner is feasible. Phantom experiments showed that possible interference effects introduced by acquiring data from the two modalities simultaneously are small and non-significant. Further experiments can now investigate the benefits of simultaneous PET and

Pet Allergy Quiz

Science.gov (United States)

... Treatments ▸ Allergies ▸ Pet Allergy ▸ Pet Allergy Quiz Share | Pet Allergy Quiz More than half of U.S. households ... cat family. Yet, millions of people suffer from pet allergies. Take this quiz to test your knowledge ...

Colorectal cancer staging: comparison of whole-body PET/CT and PET/MR.

Science.gov (United States)

Catalano, Onofrio A; Coutinho, Artur M; Sahani, Dushyant V; Vangel, Mark G; Gee, Michael S; Hahn, Peter F; Witzel, Thomas; Soricelli, Andrea; Salvatore, Marco; Catana, Ciprian; Mahmood, Umar; Rosen, Bruce R; Gervais, Debra

2017-04-01

Correct staging is imperative for colorectal cancer (CRC) since it influences both prognosis and management. Several imaging methods are used for this purpose, with variable performance. Positron emission tomography-magnetic resonance (PET/MR) is an innovative imaging technique recently employed for clinical application. The present study was undertaken to compare the staging accuracy of whole-body positron emission tomography-computed tomography (PET/CT) with whole-body PET/MR in patients with both newly diagnosed and treated colorectal cancer. Twenty-six patients, who underwent same day whole-body (WB) PET/CT and WB-PET/MR, were evaluated. PET/CT and PET/MR studies were interpreted by consensus by a radiologist and a nuclear medicine physician. Correlations with prior imaging and follow-up studies were used as the reference standard. Correct staging was compared between methods using McNemar's Chi square test. The two methods were in agreement and correct for 18/26 (69%) patients, and in agreement and incorrect for one patient (3.8%). PET/MR and PET/CT stages for the remaining 7/26 patients (27%) were discordant, with PET/MR staging being correct in all seven cases. PET/MR significantly outperformed PET/CT overall for accurate staging (P = 0.02). PET/MR outperformed PET/CT in CRC staging. PET/MR might allow accurate local and distant staging of CRC patients during both at the time of diagnosis and during follow-up.

Riqueza por vivienda de los hogares y sus efectos amplificadores en el consumo

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Miguel Ángel Morales Mosquera

2010-12-01

Full Text Available Este documento analiza los efectos que generan los cambios en la riquezade los hogares en el consumo agregado de la economía. Dado que el principalactivo en la riqueza de los hogares es la vivienda, es importante analizar sucomportamiento y entender los canales por los cuales el cambio en la valoración de este activo, puede generar cambios en la riqueza, y por ende, variaciones en el consumo agregado. Para ello se desarrolla un modelo en el que la vivienda hace de colateral y los hogares pueden realizar inversión en este sector. En el modelo se incluyen restricciones al crédito y costos de ajuste a la inversión, en orden de analizar sus implicaciones en el consumo. Al final, se obtiene que los hogares que enfrentan bajos costos de ajuste en la inversión y que, adicionalmente utilizan a la vivienda como colateral, enfrentan mayores fluctuaciones en el consumo dado el efecto del acelerador financiero.

Consumo de micronutrientes y tumores de vías urinarias en Córdoba, Argentina.

OpenAIRE

Román, María Dolores; Roqué, Florencia Inés; Muñoz, Sonia Edith; Andreatta, María Marta; Navarro, Alicia; Diaz, Maria del Pilar

2015-01-01

Introducción: Los micronutrientes contenidos en los alimentos de consumo habitual integran el modelo de red causal del cáncer aunque su evaluación conjunta es compleja debido a la interdependencia en el consumo habitual. Diversos estudios reportaron que ciertos nutrientes pueden modificar el riesgo de desarrollar tumores de vías urinarias (TVU), aunque dicha evidencia es aún limitada. Objetivo: Identificar asociaciones entre el consumo de vitaminas A, E, B6, C, fósforo, selenio y zinc proce...

Lifetime prevalence of drugs use in adolescents from Cartagena, Colombia Prevalencia de vida de consumo de sustancias sicoactivas en adolescentes de Cartagena, Colombia Prevalência de vida de consumo de substâncias em adolescentes de Cartagena, Colômbia

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Zuleima Cogollo Milanés

2012-07-01

Full Text Available Objective. To estimate the prevalence of lifetime use of psychoactive drugs in adolescents from Cartagena, Colombia. Methodology. Cross-sectional study carried out with a representative sample of 244 adolescents between 13 and 17 years of age from the general population. The study inquired on use of psychoactive drugs at any time of their lives (cocaine, ecstasy, inhalants, marihuana, or any drug that can be injected. The explanatory variables were adjusted through logistic regression. Results. Participants were from low and middle socio-economic levels. The lifetime prevalence of use of any drug was 20%. A total of 19% of the participants reported daily cigarette use and 18% had risky alcohol use. The following risk factors were related to drug use some time in their lives: daily cigarette use (OR=30.2; CI95%=11.8-77.6, not being religious (OR=5.8; CI95%=1.8- 18.8, male gender (OR=3.7; CI95%=1.1-13.1, and risky alcohol use (OR=3.5; CI95%=1.2-9.8. Conclusion. Use of any illegal drug some time in their lives by adolescents is high, constituting a healthcare problem, which should be addressed by government organizations. This use was related to male gender, not being religious, cigarette smoking, and having risky alcohol use.Objetivo. Estimar la prevalencia de vida de consumo de sustancias sicoactivas en adolescentes de Cartagena, Colombia. Metodología. Estudio de corte transversal realizado en una muestra representativa de 244 adolescentes entre 13 y 17 años. Se indagó sobre el consumo alguna vez en la vida de sustancias sicoactivas (cocaína, éxtasis, inhalantes, marihuana o alguna inyectable. Mediante regresión logística se ajustaron las variables explicatorias. Resultados. Los participantes pertenecían a los estratos socioeconómicos bajo y medio. La prevalencia de vida de consumo de alguna sustancia fue de 20%. El 19% informó consumo diario de cigarrillo y 18% tenía consumo problemático de alcohol. Se relacionaron con el consumo de

TOF-PET/MR和TOF-PET/CT在体部恶性肿瘤SUVmax值的比较%Comparision of SUVmax of TOF-PET/MR and TOF-PET/CT in body malignant tumor

Institute of Scientific and Technical Information of China (English)

宋天彬; 卢洁; 崔碧霄; 马杰; 杨宏伟; 马蕾; 梁志刚

2017-01-01

目的 探讨时间飞行(TOF)技术PET/CT和PET/MR检查体部恶性病变SUVmax值的一致性.方法 回顾性分析接受TOF-PET/CT和TOF-PET/MR检查的体部恶性肿瘤患者20例,分为先PET/CT后PET/MR组和先PET/MR后PET/CT组,每组10例.采用Bland-Altma图评价两次检查病灶SUVmax值的一致性,采用多因素方差分析评价扫描顺序和机器类型对病灶的SUVmax测量值的影响.结果 TOF-PET/CT与TOF-PET/MR检查病灶的SUVmax值有较好的一致性[先PET/CT后PET/MR组:均值差为3.06,95％CI(-7.5,13.6),先PET/MR后PET/CT组:均值差3.0,95％CI(-2.4,8.3)].扫描顺序对于恶性病灶的SUVmax有影响(F=46.00,P＜0.001),而机器类型对恶性病灶的SUVmax值无影响(F=0.005,P=0.95).结论 TOF-PET/MR和TOF-PET/CT在体部恶性病变SUVmax值测量方面具有相当的诊断价值,且延迟显像SUVmax的增加与采集时间有关,而与检查机器类型无关.%Objective To explore the consistency of time-of-flight (TOF) technology of PET/MRI and PET/CT for max standardized uptake value (SUVmax) of body malignant tumors.Methods A retrospective analysis of TOF-PET/CT and TOF-PET/MR imaging data about twenty patients with body malignant tumors was performed.Patients were divided into two groups (each n=10),including PET/CT first and sequentially PET/MR group and PET/MR first and sequentially PET/CT group.Bland-Altman figure was used to evaluate consistency of SUVmax of malignant lesions between TOF-PET/CT and TOF-PET/MR.Multi-way ANOVA was used to analysis effect of machine type and exam order on SUVmaxof malignant lesions in TOF-PET/CT and TOF-PET/MR.Results SUVmax of malignant lesions in TOF-PET/CT and TOF-PET/MR had good consistency in two groups (PET/CT first and sequentially PET/MR group:Mean difference was 3.06,95％CI was [-7.5,13.6];PET/MR first and sequentially PET/CT group:Mean difference was 3.0,95％CI was [-2.4,8.3]).SUVmax was not influenced by machine type (F=0.005,P=0.95),but exam order (F=46.00,P＜0

Implementasi Sistem ERP (Enterprise Resources Planning PT Pos Indonesia : Sebuah Inisiasi dan Strategi

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Anton Susanto

2013-12-01

Full Text Available ABSTRAK Implementasi Enterprise Resources Planning (ERP PT Pos Indonesia merupakan bagian dari strategi penguatan internal bisnis perusahaan dan pilihan yang cukup penting dalam konteks karena tidak sedikit berbagai implementasi ERP oleh perusahaan-perusahaan di Indonesia yang mengalami kegagalan baik disebabkan oleh over budget, over time dalam pengerjaan proyek, kinerja sistem yang kurang dan keuntungan yang tidak sesuai harapan (Dantes & Hasibuan, 2011. Pilihan investasi ERP ini bukan karena sebab, berbagai pengaruh lingkungan internal maupun eksternal telah menjadi dorongan tersendiri bagi perlunya ERP pada PT Posindo. Faktor eksternal dimaksud seperti iklim kompetisi yang semakin meningkat, upaya IPO (Initial Public Offering yang membutuhkan penerapan tata kelola bisnis dengan standar yang berlaku best practice dan diterima secara internasional dan berbagai kebijakan dan regulasi terkati UU Perposan dan juga peraturan tentang BUMN. Sebagai sebuah sistem terintegrasi, ERP dalam konteks internal diharapkan dapat meningkatkan efisiensi dan kinerja aset produk agar lebih meningkatkan nilai tambah bagi perusahaan, seperti Layanan Pos dan bisnis retail yang secara financial memberikan value added negatif pada tahun 2012. Dalam tahap inisiasi, implementasi ERP dilakukan secara bertahap dimulai dengan modul SAP modul FICO (Financial Controlling dengan memperhatikan kesiapan infrastruktur dan pengembangan aplikasi-aplikasi existing (in-house development agar nantinya dapat diintegrasikan dengan basis data pada ERP. ABSTRACT The implementation of Enterprise Resource Planning (ERP at PT Pos Indonesia is a part of strengthening internal business strategy and important options because there is many implementation of ERP by various companies in Indonesia that have failed either due to over-budget, over- time in construction project , the performance of the system is lacking and  benefits that are not as expected (Dantes & Hasibuan , 2011. ERP investment

Consumo de sustancias durante la adolescencia:trayectorias evolutivas y consecuencias para el ajuste psicológico

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Alfredo Oliva

2008-01-01

Full Text Available Este estudio ha perseguido dos objetivos fundamentales: encontrar diferentes trayectorias en el consumo de sustancias a lo largo de la adolescencia y analizar las consecuencias que este consumo en la adolescencia temprana y media tiene para el ajuste emocional y comportamental al final de la adolescencia. El estudio, con un diseño descriptivo longitudinal mediante cuestionarios, se llevó a cabo sobre una muestra de 101 adolescentes (63 varones y 38 mujeres que fueron estudiados en 3 ocasiones: a los 13, 15 y 18 años de edad. Los resultados mostraron tres grupos de adolescentes en función de las trayectorias seguidas por su consumo de sustancias: consumo bajo, consumo ascendente y experimentación precoz. La comparación entre estos tres grupos indicó un mejor ajuste psicológico en la adolescencia tardía entre los varones y mujeres del grupo de experimentadores, mientras que los problemas de conducta fueron más frecuentes entre los incluidos en el grupo de consumo ascendente. Por otra parte, los análisis de regresión señalaron que el consumo moderado de sustancias en la adolescencia temprana estaba relacionado con una autoestima más alta y con menos problemas emocionales al final de la adolescencia, pero no con más problemas externos.

Consumo de drogas y competencia social en jóvenes universitarios de la Unidad Regional Sur

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Alondra Jimena Olivares Noriega

2013-12-01

Full Text Available El consumo de drogas representa un problema de salud pública, y entre los jóvenes universitarios representa un riesgo mayor por ser la fase en la que experimentan nuevas situaciones generadoras de estrés, lo cual puede desencadenar conductas negativas asociadas al consumo de drogas. Con el objetivo describir el consumo de drogas licitas e ilícitas y su relación con la competencia social, se llevó a cabo la presente investigación, en 170 alumnos de primer ingreso. El estudio fue descriptivo y correlacional. En el consumo de drogas lícitas, el 57.6% ha consumido tabaco alguna vez en la vida, el 19.4% lo hace diariamente; el 20.5% consume alcohol de forma riesgosa y 9% de forma perjudicial, con mayor frecuencia en el sexo masculino. En cuanto al consumo de drogas ilícitas las más consumidas alguna vez en la vida fueron la marihuana (9.4% y la cocaína (7.6%. Se aplicó el coeficiente de correlación de Spearman en el que se encontró relación positiva débil y estadísticamente significativa de la conducta antisocial con el consumo de alcohol (rs = .297, p < .001 y consumo de drogas ilegales (rs = .228, p < .003.

Estudio de propiedades térmicas y mecánicas en espumas de mezclas poliméricas entre copolímero de etileno-acetato de vinilo (EAV y caucho natural (CN

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Daniel Alberto Morales Rivera

2006-01-01

Full Text Available Se estudiaron algunas propiedades de espumas poliméricas, preparadas con mezclas de copolímeros de etileno-acetato de vinilo (EAV y caucho natural (CN: comportamiento térmico, por análisis térmico diferencial (DSC, y análisis termogravimétrico (TGA, resistencia a la tracción, compresión set y contenido de gel. Se establecieron relaciones entre la composición de las mezclas y las propiedades medidas en función de la reticulación y el espumado, teniendo en cuenta estudios previos realizados en espumas poliolefínicas con densidades similares.

Consumo de alcohol y otras sustancias, un problema en estudiantes universitarios de salud

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Estela Rodríguez-Torres

2016-06-01

Full Text Available Objetivo: caracterizar el consumo de alcohol y otras sustancias, los motivos para consumir o no consumir en estudiantes de pregrado de una universidad privada en Santiago de Cali. Materiales y Métodos: estudio descriptivo transversal, con una muestra de 207 estudiantes pertenecientes a dos programas de salud de una universidad privada, estuvo integrada por estudiantes entre los 14 y 49 años de edad, media de 23 años, seleccionados aleatoriamente por muestreo estratificado proporcional. Se utilizó un cuestionario de auto reporte Alcohol Use Disorders Identification Test y preguntas sobre los motivos de consumo de sustancias legales e ilegales. Se realizó análisis univariado y estimadores con intervalos de confianza, en relación con otras variables se calculó prueba de X 2 utilizando Epi Info 7. Resultados: el consumo en el último año para sustancias legales como alcohol es de 76.8% (IC 95%: 70.5-82.4 para cigarrillo de 15% (IC 95%: 10.4-20.6. Para sustancias ilegales como la marihuana un 1% (IC 95%: 0.1-3.4. Entre las razones para el consumo los participantes manifiestan que los hace sentir bien en un 69.3% (IC 95%: 60.6-75.2 Conclusiones: entre los universitarios del área de la salud, el consumo de sustanciales legales es semejante al de la población general. La elaboración de planes de intervención para prevenir el consumo de drogas legales e ilegales, es una tarea que debe asumir la academia en su labor educativa y de proyección social de manera permanente.

Consumo de bebida alcoólica entre fumicultores: prevalência e fatores associados

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Juliana Lopes Fávero

Full Text Available Resumo Resultados Este trabalho tem por objetivo descrever a prevalência do beber pesado e o consumo de risco de bebida alcoólica e fatores associados em agricultores que cultivam fumo. Foi realizado estudo transversal em 2469 fumicultores, maiores de 18 anos, no ano de 2011. Foi considerado consumo de risco de bebida alcoólica a ingestão de 3 ou mais doses padrão por dia em homens e 2 ou mais em mulheres. O beber pesado foi a ingestão de 15 ou mais doses padrão por semana em homens e 8 ou mais em mulheres. Foi realizada análise multivariada hierarquizada, que examinou a associação com variáveis socioeconômicas, comportamentais e ocupacionais. : A prevalência do consumo de risco e beber pesado foi 4,7% e 1,09% em mulheres e 30,8% e 4,8% em homens, respectivamente. Foram associados com consumo de risco em homens e mulheres: o percentual da renda representado pelo fumo (RP 1,3 e 0,4, ser empregado (RP 1,3 e 3,1 e uso de agrotóxico (RP 1,5 e 2,1, respectivamente. Foi associado a beber pesado em homens: perda da lavoura (RP 1,6, participação em atividades religiosas (RP 0,3 e horas de trabalho agrícola (RP 0,6. Existe associação de fatores ocupacionais com o consumo de risco de bebidas alcoólicas em homens. Os fatores associados variam conforme o padrão de consumo avaliado.

El impacto de las redes sociales en la función consumo

OpenAIRE

Jiménez Nieto, Sara; Jiménez Ruiz, Cristian Camilo

2013-01-01

El trabajo evalúa el impacto de las redes sociales en el volumen de ventas en el mercado de consumo masivo directo B2C (Business to consumer), medido a través de la manera en que las redes sociales afectan las preferencias del consumidor y por esta vía su función de consumo en la población

Dedicated brain PET system of PET/MR for brain research

International Nuclear Information System (INIS)

Cheng, Li; Liu, Yaqiang; Ma, Tianyu; Wang, Shi; Wei, Qingyang; Xu, Tianpeng

2015-01-01

This work is to replace PET ring in human brain PET/MR system with a dedicated wearable PET insert, aimed at improving both patient feasibility and system performance for brain imaging. The designed PET/MR system includes two parts: the inside parts, including a radio frequency (RF) coil and PET ring, are mounted on patient’s head, and the outside part, a MR imager, is dependent of patient. The RF coil is the innermost layer, surrounded by an outer PET-ring layer. They are supported by a MRcompatible structure. And both RF coil and PET detectors are placed inside a standard clinical 3-T MR imager. From the design of the system we can infer that some advantages can be achieved. First, high sensitivity will be achieved with the same amount crystals as the PET ring is more close to region-of-interest area, at a reduced cost. Second, by using a 2-layer depth of interaction (DOI) detector, the parallax effect can be minimized. The resolution will benefit from short positron range caused by magnetic field and smaller ring diameter will also reduce the effect of non-collinearity. Thirdly, as the PET ring is mounted on head, impact of patient motion will be reduced.

Dedicated brain PET system of PET/MR for brain research

Energy Technology Data Exchange (ETDEWEB)

Cheng, Li; Liu, Yaqiang; Ma, Tianyu; Wang, Shi; Wei, Qingyang; Xu, Tianpeng [Institute of Medical Physics, Department of Engineering Physics, Tsinghua University, Beijing (China)

2015-05-18

This work is to replace PET ring in human brain PET/MR system with a dedicated wearable PET insert, aimed at improving both patient feasibility and system performance for brain imaging. The designed PET/MR system includes two parts: the inside parts, including a radio frequency (RF) coil and PET ring, are mounted on patient’s head, and the outside part, a MR imager, is dependent of patient. The RF coil is the innermost layer, surrounded by an outer PET-ring layer. They are supported by a MRcompatible structure. And both RF coil and PET detectors are placed inside a standard clinical 3-T MR imager. From the design of the system we can infer that some advantages can be achieved. First, high sensitivity will be achieved with the same amount crystals as the PET ring is more close to region-of-interest area, at a reduced cost. Second, by using a 2-layer depth of interaction (DOI) detector, the parallax effect can be minimized. The resolution will benefit from short positron range caused by magnetic field and smaller ring diameter will also reduce the effect of non-collinearity. Thirdly, as the PET ring is mounted on head, impact of patient motion will be reduced.

Crisis y nuevos patrones de consumo: discursos sociales acerca del consumo ecológico en el ámbito de las grandes ciudades españolas.

Directory of Open Access Journals (Sweden)

Luis Enrique Alonso

2014-01-01

Full Text Available La situación de profunda crisis económica que atraviesa España desde hace varios años está teniendo efectos significativos en las formas de relación de la ciudadanía con las prácticas de consumo. Una de las cuestiones más relevantes en este contexto tiene que ver con la posibilidad de un crecimiento de la con - ciencia medioambiental, ante la dificultad creciente para sostener los patrones consumistas de la época del boom, la popularización de nuevas pautas de con - sumo responsable y la creciente preocupación en relación a fenómenos como el cambio climático. En este artículo, nuestro objetivo específico es el de explorar las percepciones sociales en relación al denominado consumo ecológico, desde una perspectiva fundamentalmente cualitativa. Para ello, procederemos a realizar un análisis de los discursos generados en una serie de grupos de discusión, en el marco de una investigación más amplia sobre la relación entre consumo y crisis. Los resultados obtenidos parecen apuntar hacia las dificultades que presentan las opciones de consumo ecológicas de consolidarse en el imaginario del consumi - dor medio español, debido a una serie de razones que se describirán con detalle en nuestro trabajo

Effect of Attenuation Correction on Regional Quantification Between PET/MR and PET/CT

DEFF Research Database (Denmark)

Teuho, Jarmo; Johansson, Jarkko; Linden, Jani

2016-01-01

UNLABELLED: A spatial bias in brain PET/MR exists compared with PET/CT, because of MR-based attenuation correction. We performed an evaluation among 4 institutions, 3 PET/MR systems, and 4 PET/CT systems using an anthropomorphic brain phantom, hypothesizing that the spatial bias would be minimized....../MR systems, CTAC was applied as the reference method for attenuation correction. RESULTS: With CTAC, visual and quantitative differences between PET/MR and PET/CT systems were minimized. Intersystem variation between institutions was +3.42% to -3.29% in all VOIs for PET/CT and +2.15% to -4.50% in all VOIs...... for PET/MR. PET/MR systems differed by +2.34% to -2.21%, +2.04% to -2.08%, and -1.77% to -5.37% when compared with a PET/CT system at each institution, and these differences were not significant (P ≥ 0.05). CONCLUSION: Visual and quantitative differences between PET/MR and PET/CT systems can be minimized...

Consumo de alcohol y drogas y factores psicosociales asociados en adolescentes de Lima

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Eduardo Salazar

2004-09-01

Full Text Available Objetivo: Determinar la prevalencia del consumo de alcohol y drogas y los factores psicosociales asociados con dicho consumo en adolescentes de Lima. Diseño: Estudio analítico de corte transversal. Material y Métodos: Se estudió una muestra de 430 adolescentes de educación secundaria de un colegio de Lima. Se utilizó el Cuestionario Tamiz de Experiencias Personales (Personal Experience Screening Questionnaire - PESQ. Resultados: Se recibió 391 encuestas válidas. La prevalencia de consumo de alcohol o drogas fue 43%, de alcohol 42,2%, de marihuana 8,7% y de cocaína 3,1%. Se encontró problema de consumo de alcohol o drogas en el 10,7%, los factores psicosociales asociados fueron distrés psicológico severo (OR 4,58 IC 95% 1,60-13,05, pensamiento problemático severo (OR 2,63 IC 95% 1,15-6,01 y abuso físico (OR 2,31 IC 95% 1,19-4,49. Conclusiones: El factor psicosocial más asociado al problema de consumo de drogas fue el distrés psicológico severo. Asimismo, se encontró asociación entre el pensamiento problemático severo y el abuso físico con dicho problema. El acoso sexual sólo se encontró asociado en los adolescentes de segundo de secundaria.

El consumo de drogas en el debate de la salud pública

Directory of Open Access Journals (Sweden)

Andrés Felipe Tirado-Otálvaro

2016-01-01

Full Text Available Resumen: Este texto sitúa el consumo de drogas ilegales en el debate actual entre la salud pública tradicional, frente a las propuestas latinoamericanas, y propone la necesidad de abordar el tema desde de una salud pública alternativa, centrada en la vida y el protagonismo de los sujetos, los grupos y los movimientos sociales, mediante una praxis contrahegemónica, para orientar así la discusión sobre la necesidad de generar políticas públicas incluyentes y democráticas. El consumo de drogas ha sido abordado desde la medicina clínica como un problema que genera trastornos mentales y enfermedades infecciosas, ya sea por las prácticas sexuales de riesgo, o el uso de jeringas para el consumo intravenoso; desde la política, como un problema relacionado con fenómenos delictivos; y desde la salud pública tradicional, como un problema que genera abandono escolar y laboral, aumento en la demanda de servicios de salud, muerte y violencia; sin embargo, no todas las formas de consumo representan un uso problemático, ni desencadenan trastornos por uso de sustancias.

Consumo Compensatorio: ¿Una nueva forma de construir sensibilidades desde el Estado?

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Adrián Scribano

2014-09-01

Full Text Available La motivación central del presente trabajo es explorar la emergencia de un fenómeno social que, al menos, se viene consolidando en los últimos catorce años en Latinoamérica en general y en Argentina en particular: el consumo compensatorio. El artículo sintetiza un conjunto de indagaciones que venimos realizando en el cruce entre una sociología de las políticas sociales y una manera de entender la sociología de los cuerpos/emociones. La estrategia argumentativa que hemos seleccionado es la siguiente: a se bosqueja el punto de partida conceptual sobre los cruces entre políticas sociales y sensibilidades, b se presenta un esquema de las conexiones consumo y disfrute en la actualidad, c se muestran algunos resultados de las indagaciones que se han utilizado como base del análisis y d se conceptualiza de modo sintético una noción de consumo compensatorio como resultado de la argumentación. Se finaliza proponiendo la posibilidad de que el consumo compensatorio es hoy, tal vez,  “una política social” retomada desde y para el mercado. 

Consumo Compensatorio: ¿Una nueva forma de construir sensibilidades desde el Estado?

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Angélica De Sen

2014-08-01

Full Text Available La motivación central del presente trabajo es explorar la emergencia de un fenómeno social que, al menos, se viene consolidando en los últimos catorce años en Latinoamérica en general y en Argentina en particular: el consumo compensatorio. El artículo sintetiza un conjunto de indagaciones que venimos realizando en el cruce entre una sociología de las políticassociales y una manera de entender la sociología de los cuerpos/emociones. La estrategia argumentativa que hemosseleccionado esla siguiente: ase bosqueja el punto de partida conceptualsobre los cruces entre políticas sociales y sensibilidades, bse presenta un esquema de las conexiones consumo y disfrute en la actualidad, cse muestran algunosresultados de lasindagaciones que se han utilizado como base del análisis y dse conceptualiza de modo sintético una noción de consumo compensatorio como resultado de la argumentación. Se finaliza proponiendo la posibilidad de que el consumo compensatorio es hoy, tal vez, “una política social” retomada desde y para el mercado

Quantitative PET imaging with the 3T MR-BrainPET

International Nuclear Information System (INIS)

Weirich, C.; Scheins, J.; Lohmann, P.; Tellmann, L.; Byars, L.; Michel, C.; Rota Kops, E.; Brenner, D.; Herzog, H.; Shah, N.J.

2013-01-01

The new hybrid imaging technology of MR-PET allows for simultaneous acquisition of versatile MRI contrasts and the quantitative metabolic imaging with PET. In order to achieve the quantification of PET images with minimal residual error the application of several corrections is crucial. In this work we present our results on quantification with the 3T MR BrainPET scanner

Brain PET scan

Science.gov (United States)

... results on a PET scan. Blood sugar or insulin levels may affect the test results in people with diabetes . PET scans may be done along with a CT scan. This combination scan is called a PET/CT. Alternative Names Brain positron emission tomography; PET scan - brain References Chernecky ...

Clinical PET application

Energy Technology Data Exchange (ETDEWEB)

Lim, Sang Moo; Hong, Song W.; Choi, Chang W.; Yang, Seong Dae [Korea Cancer Center Hospital, Seoul (Korea)

1997-12-01

PET gives various methabolic images, and is very important, new diagnostic modality in clinical oncology. In Korea Cancer Center Hospital, PET is installed as a research tool of long-mid-term atomic research project. For the efficient use of PET for clinical and research projects, income from the patients should be managed to get the raw material, equipment, manpower, and also for the clinical PET research. 1. Support the clinical application of PET in oncology. 2. Budgetary management of income, costs for raw material, equipment, manpower, and the clinical PET research project. In this year, 250 cases of PET images were obtained, which resulted total income of 180,000,000 won. 50,000,000 won was deposited for the 1998 PET clinical research. Second year PET clinical research should be managed under unified project. Increased demand for {sup 18}FDG in and outside KCCH need more than 2 times production of {sup 18}FDG in a day purchase of HPLC pump and {sup 68}Ga pin source which was delayed due to economic crisis, should be done early in 1998. (author). 2 figs., 3 tabs.

A imersão orgânica no Templo de Consumo

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Renato Nunes Bittencourt

2015-02-01

Full Text Available Neste artigo abordamos a relação funcional e afetiva que o sujeito de consumo da sociedade administrada estabelece para com um dos mais bem-sucedidos modelos comerciais da tecnocracia capitalista, o Shopping Center, evidenciando uma espécie de simbiose entre o humano e o material, circunstância que demonstra o efeito sedutor que a estrutura assimiladora do Shopping Center, um genuíno templo de consumo, exerce sobre a subjetividade pessoal do frequentador, dando-lhe a sensação de conforto e segurança que não encontra no mundo exterior. Contudo, por reconhecermos que a sociedade de consumo se fundamenta na alienação da consciência do ser humano, propomos a ressignificação do Shopping Center, de modo a torná-lo um espaço social de politização.

A infância e a cultura do consumo na contemporaneidade

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Michele Guedes Bredel de Castro

2016-01-01

Full Text Available Observa-se na atualidade que ao mesmo tempo em que a criança é objeto do consumo, também é sujeito, na medida em que consome tanto ou mais que um adulto. Analisar as práticas culturais contemporâneas da criança, relacionadas à cultura de consumo, faz-se necessário e importante hoje quando, em função da lógica do mercado, as relações entre adulto e criança foram modificadas. O presente artigo tem como objetivo compreender as implicações da cultura do consumo na constituição da infância. Defini como metodologia uma pesquisa de cunho teórico. Tomei como referencial teórico dentre outros autores, os estudos de Buckingham (2002, Canclini (1997, Postman (1999 e Ribes (2003. Traz à tona questões polêmicas sobre o impacto do consumo na infância, suscitando novas questões sobre a temática. Palavras-chave: infância, criança, consumo. It is noted that in actuality the same time the child is an object of consumption, it is also subject, as it consumes much or more than an adult. Analyze contemporary cultural practices of children relating to consumer culture, it is necessary and important today when, according to the market logic, relations between adults and children have been modified. This papers aims to understand the implications of consumer culture in childhood constitution. Set as methodology one theoretical, research based on studies of Buckingham (2002, Canclini (1997, Postman (1999 and Ribes (2003. It brings up controversial issues on the impact of consumption in childhood, raising new questions about the topic. Keywords: childhood, child, consumption.

PET and PET/CT in oncology: the key of diagnostic challenge

International Nuclear Information System (INIS)

Mortelmans, L.; Stroobants, S.; Spaepen, K.

2004-01-01

In this presentation authors present use of positron emission tomography (PET) in oncology. This lecture is divided to the following parts: (1) Assessment of treatment response; (2) Treatment monitoring by PET: clinical examples; (3) PET for early response assessment; (4) Use of PET in Radiotherapy planning

'PET -Compton' system. Comparative evaluation with PET system using Monte Carlo simulation

International Nuclear Information System (INIS)

Diaz Garcia, Angelina; Arista Romeu, Eduardo; Abreu Alfonso, Yamiel; Leyva Fabelo, Antonio; Pinnera Hernandez, Ibrahin; Bolannos Perez, Lourdes; Rubio Rodriguez, Juan A; Perez Morales, Jose M.; Arce Dubois, Pedro; Vela Morales, Oscar; Willmott Zappacosta, Carlos

2011-01-01

Positron Emission Tomography (PET) in small animals has actually achieved spatial resolution round about 1 mm and currently there are under study different approaches to improve this spatial resolution. One of them combines PET technology with Compton Cameras. This paper presents the idea of the so called 'PET-Compton' systems and includes comparative evaluation of spatial resolution and global efficiency in both PET and PET-Compton system by means of Monte Carlo simulations using Geant4 code. Simulation is done on a PET-Compton system consisting of LYSO-LuYAP scintillating detectors of particular small animal PET scanner named 'Clear-PET' and for Compton detectors based on CdZnTe semiconductor. A group of radionuclides that emits a positron (e + ) and γ quantum almost simultaneously and fulfills some selection criteria for their possible use in PET-Compton systems for medical and biological applications were studied under simulation conditions. (Author)

Circuitos online de comunicação relacionada ao consumo

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Ernani Coelho Neto

2008-09-01

Full Text Available O artigo discute o papel da internet na circulação de informações sobre produtos e serviços e apresenta a noção de circuitos online de comunicação relacionada ao consumo. A análise destaca a ampliação da interação entre consumidores através da internet como um fenômeno da comunicação contemporânea e suas implicações sobre o processo de construção da experiência de consumo. Palavras-chave: Comunicação; consumo; internet; interação entre consumidores. ABSTRACT The article argues the role of the Internet in the circulation of informations on products and services and presents the notion of circuits online of communication related to the consumption. The analysis detaches the magnifying of the interaction between consumers through the Internet as a phenomenon of the contemporary communication and its implications on the process of construction of the consumption experience. Keywords: Communication; consumption; internet; consumer interactions.

Importancia del consumo de productos hidropónicos en Guayaquil

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Hugo Ramiro Castillo Lascano

2015-11-01

Full Text Available El propósito de esta investigación busca concientizar a la ciudadanía en general en la educación en cuanto a valores nutricionales y, de qué manera puede beneficiar a la salud de los habitantes de la ciudad de Guayaquil, creando una nueva cultura de consumo de productos tratados de manera no tradicional (Hidropónicos, ricos en valores nutricionales apegados de acuerdo a la Matriz Productiva sobre la base al Plan Nacional del Buen Vivir, impulsado por el Gobierno Nacional de la República del Ecuador. El consumo de Productos Hidropónicos en la ciudad de Guayaquil es importante, debido a que actualmente es necesario saber los beneficios de consumir productos provenientes de un tipo de cultivo no tradicional, debido a la tendencia del cuidado de la salud en general y del consumo de alimentos sin un alto volumen de químicos que se utilizan en la mayoría de frutas o vegetales provenientes de cultivos tradicionales.

Física y consumo responsable

OpenAIRE

Calvo Iglesias, Encina

2016-01-01

En esta comunicación se reflexiona sobre la educación científica que se imparte y si es adecuada para que la ciudadanía pueda interpretar la composición de cosméticos o productos de limpieza. En particular, se analizan los conocimientos sobre los tensoactivos del alumnado de primer de curso del Grado de Ingeniería Química y se proponen tareas que fomenten un consumo responsable

PET-COMPTON System. Comparative evaluation with PET System using Monte Carlo Simulation

International Nuclear Information System (INIS)

Diaz Garcia, Angelina; Arista Romeu, Eduardo; Abreu Alfonso, Yamiel; Leyva Fabelo, Antonio; Pinnera HernAndez, Ibrahin; Bolannos Perez, Lourdes; Rubio Rodriguez, Juan A.; Perez Morales, Jose M.; Arce Dubois, Pedro; Vela Morales, Oscar; Willmott Zappacosta, Carlos

2012-01-01

Positron Emission Tomography (PET) in small animals has actually achieved spatial resolution round about 1 mm and currently there are under study different approaches to improve this spatial resolution. One of them combines PET technology with Compton Cameras. This paper presents the idea of the so called PET-Compton systems and has included comparative evaluation of spatial resolution and global efficiency in both PET and PET-Compton system by means of Monte Carlo simulations using Geant4 code. Simulation was done on a PET-Compton system made-up of LYSO-LuYAP scintillating detectors of particular small animal PET scanner named Clear-PET and for Compton detectors based on CdZnTe semiconductor. A group of radionuclides that emits a positron (e+) and quantum almost simultaneously and fulfills some selection criteria for their possible use in PET-Compton systems for medical and biological applications were studied under simulation conditions. By means of analytical reconstruction using SSRB (Single Slide Rebinning) method were obtained superior spatial resolution in PET-Compton system for all tested radionuclides (reaching sub-millimeter values of for 22Na source). However this analysis done by simulation have shown limited global efficiency values in PET-Compton system (in the order of 10 -5 -10 -6 %) instead of values around 5*10 -1 % that have been achieved in PET system. (author)

PREVENCIÓN INDICADA DEL CONSUMO PROBLEMÁTICO DE DROGAS EN ADOLESCENTES DE BARCELONA

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Anna M Guitart

2012-01-01

Full Text Available Fundamentos: El Servicio de Orientación sobre Drogas (SOD de Barcelona ofrece un programa de Información y Orientación (PIO para adolescentes y un Programa de Medidas Alternativas (PMA a menores sancionados por consumo/tenencia de drogas en la vía pública. El objetivo de este trabajo es describirlos y comparar los perfiles de los usuarios en cada uno de ellos. Métodos: Estudio transversal descriptivo de 1.010 personas atendidas en ambos programas durante el período 2008-2010, con cribado de patología psiquiátrica y adicción e intervención breve extendida en consumidores sin indicios de patología. Se compararon los perfiles de los usuarios y se calcularon las tasas de uso del PMA por edad. Resultados: El cannabis motivó el 89,9% de entradas en el Servicio. Entre los usuarios del PIO el consumo de alto riesgo de cannabis fue del 13,1% y el consumo de riesgo de alcohol del 11,3%. Entre los usuarios del PMA los consumos fueron del 8,9 y 4% respectivamente. El 38% de los usuarios del PIO y el 6% de los del PMA se derivaron a atención especializada por presentar criterios de abuso o dependencia a alguna sustancia psicoactiva u otro trastorno psiquiátrico. Conclusiones: Los adolescentes atendidos en PMA hacen un consumo de cannabis (y en muchos casos de alcohol de riesgo bajo o moderado comparados con los del PIO. Además del valor de la intervención preventiva indicada, los programas facilitan la detección precoz de consumos problemáticos o trastornos mentales incipientes y su derivación.

Pautas de consumo televisivo en adolescentes de la era digital: un estudio transcultural

Directory of Open Access Journals (Sweden)

2017-01-01

Full Text Available Los profundos cambios acaecidos en la configuración del contexto mediático en los últimos tiempos, han generado cambios tanto en el medio televisivo como en las relaciones establecidas con él. Es por ello que, resulta necesario conocer cómo consumen la televisión los jóvenes actuales en aras de crear estrategias que ayuden a capacitarlos en la utilización de este medio. Con este fin, en esta investigación se han estudiado las pautas de consumo televisivo de 553 adolescentes (267 chicos y 286 chicas de Irlanda, España y México, de edades comprendidas entre 14 y 19 años. Mediante la aplicación de dos cuestionarios (CH-TV 0.2 y VAL-TV 0.2, se han podido detectar cuatro pautas de consumo generalizables a todos los contextos estudiados. Dos de estas pautas, diferencian el consumo entre hombres (Crítico-Cultural y mujeres (Social-Conversacional, siendo ellos los que realizan un consumo más cultural e informativo y ellas, más dirigido a entablar conversación con sus amistades. En lo que a las otras dos pautas se refiere, la percepción de un clima conflictivo (consumo Conflictivo-Pasivo o la de una mediación responsable (consumo Comprometido-Positivo son algunas de las variables que marcan las diferencias. Además, se han detectado aquellos factores que presentan mayor poder discriminativo en la configuración de estas pautas, siendo la preferencia mostrada hacia los géneros televisivos el factor más discriminante entre los estudiados. Sin embargo, la permanencia, el realismo percibido y el contexto cultural no han resultado ser determinantes.

El consumo de alcohol en adolescentes: el rol de la comunicación, el funcionamiento familiar, la autoestima y el consumo en la familia y amigos

OpenAIRE

Musitu Ochoa, Gonzalo; Suárez Relinque, Cristian; Del Moral Arroyo, Gonzalo; Villareal González, María Elena

2015-01-01

En este estudio se pretende analizar las relaciones existentes entre la comunicación familiar y el funcionamiento y la autoestima (dimensiones familiar y académica) con el consumo de alcohol en adolescentes escolarizados y el consumo de familia y amigos. También, se examinaron estas relaciones en función del sexo. Participaron 1,245 adolescentes mexicanos (50,7% chicos, edad media de 14,8; 49,3% chicas, edad media de 14,2) ubicados en centros educativos de secundaria y preparatoria. Se utiliz...

Cambios en el consumo de bebidos alcohólicas en España

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FRANCISCO ALVIRA MARTÍN

1986-01-01

Full Text Available Una discusión sobre los hábitos en el consumo de bebidas alcohólicas basado en los resultados de 4 cuestionarios con muestras nacionales concernientes a jóvenes y/o adultos. La comparativa se centra en patrones de consumo, incluyendo frecuencia, cantidad y tipo de bebidas, así como diferencias por edad y género. Los mayores descubrimientos relativos a la evolución a lo largo del tiempo son: 1 Se incrementa la frecuencia con la que los jóvenes beben alcohol. 2 Las diferencias entre géneros en los hábitos de consumo están decayendo, si bien es cierto que los varones siguen doblando a las mujeres en la probabilidad de ser bebedores habituales. 3 Existe un incremento en el consumo de cerveza y combinados, aunque el vino sigue siendo la bebida más popular. 4 Se detecta así mismo un incremento del número de "bebedores de fines de semana".

Comparison of dosimetry between PET/CT and PET alone using 11C-ITMM

International Nuclear Information System (INIS)

Ito, Kimiteru; Sakata, Muneyuki; Wagarsuma, Kei; Toyohara, Jun; Ishibashi, Kenji; Ishii, Kenji; Ishiwata, Kiichi; Oda, Keiichi

2016-01-01

We used a new tracer, N-[4-[6-(isopropylamino) pyrimidin-4-yl]-1,3-thiazol-2-yl]-4- 11 C-methoxy-N-methylbenzamide ( 11 C-ITMM), to compare radiation doses from positron emission tomography (PET)/computed tomography (CT) with previously published doses from PET alone. Twelve healthy volunteers [six males (mean age ± SD, 27.7 ± 6.7 years) and six females (31.8 ± 14.5 years)] in 12 examinations were recruited. Dose estimations from PET/CT were compared with those from PET alone. Regions of interest (ROIs) in PET/CT were delineated on the basis of low-dose CT (LD-CT) images acquired during PET/CT. Internal and external radiation doses were estimated using OLINDA/EXM 1.0 and CT-Expo software. The effective dose (ED) for 11 C-ITMM calculated from PET/CT was estimated to be 4.7 ± 0.5 μSv/MBq for the male subjects and 4.1 ± 0.7 μSv/MBq for the female subjects. The mean ED for 11 C-ITMM calculated from PET alone in a previous report was estimated to be 4.6 ± 0.3 μSv/MBq (males, n = 3). The ED values for 11 C-ITMM calculated from PET/CT in the male subjects were almost identical to those from PET alone. The absorbed doses (ADs) of the gallbladder, stomach, red bone marrow, and spleen calculated from PET/CT were significantly different from those calculated from PET alone. The EDs of 11 C-ITMM calculated from PET/CT were almost identical to those calculated from PET alone. The ADs in several organs calculated from PET/CT differed from those from PET alone. LD-CT images acquired during PET/CT may facilitate organ identification.

Additional value of PET-CT in the staging of lung cancer: comparison with CT alone, PET alone and visual correlation of PET and CT

International Nuclear Information System (INIS)

Wever, W. de; Marchal, G.; Bogaert, J.; Verschakelen, J.A.; Ceyssens, S.; Mortelmans, L.; Stroobants, S.

2007-01-01

Integrated positron emission tomography (PET) and computed tomography (CT) is a new imaging modality offering anatomic and metabolic information. The purpose was to evaluate retrospectively the accuracy of integrated PET-CT in the staging of a suggestive lung lesion, comparing this with the accuracy of CT alone, PET alone and visually correlated PET-CT. Fifty patients undergoing integrated PET-CT for staging of a suggestive lung lesion were studied. Their tumor, node, metastasis (TNM) statuses were determined with CT, PET, visually correlated PET-CT and integrated PET-CT. These TNM stages were compared with the surgical TNM status. Integrated PET-CT was the most accurate imaging technique in the assessment of the TNM status. Integrated PET-CT predicted correctly the T status, N status, M status and TNM status in, respectively, 86%, 80%, 98%, 70% versus 68%, 66%,88%, 46% with CT, 46%, 70%, 96%, 30% with PET and 72%, 68%, 96%, 54% with visually correlated PET-CT. T status and N status were overstaged, respectively, in 8% and 16% with integrated PET-CT, in 20% and 28% with CT, in 16% and 20% with PET, in 12% and 20% with visually correlated PET-CT and understaged in 6% and 4% with integrated PET-CT, versus 12% and 6% with CT, 38% and 10% with PET and 12% with visually correlated PET-CT. Integrated PET-CT improves the staging of lung cancer through a better anatomic localization and characterization of lesions and is superior to CT alone and PET alone. If this technique is not available, visual correlation of PET and CT can be a valuable alternative. (orig.)

Pet-Related Infections.

Science.gov (United States)

Day, Michael J

2016-11-15

Physicians and veterinarians have many opportunities to partner in promoting the well-being of people and their pets, especially by addressing zoonotic diseases that may be transmitted between a pet and a human family member. Common cutaneous pet-acquired zoonoses are dermatophytosis (ringworm) and sarcoptic mange (scabies), which are both readily treated. Toxoplasmosis can be acquired from exposure to cat feces, but appropriate hygienic measures can minimize the risk to pregnant women. Persons who work with animals are at increased risk of acquiring bartonellosis (e.g., cat-scratch disease); control of cat fleas is essential to minimize the risk of these infections. People and their pets share a range of tick-borne diseases, and exposure risk can be minimized with use of tick repellent, prompt tick removal, and appropriate tick control measures for pets. Pets such as reptiles, amphibians, and backyard poultry pose a risk of transmitting Salmonella species and are becoming more popular. Personal hygiene after interacting with these pets is crucial to prevent Salmonella infections. Leptospirosis is more often acquired from wildlife than infected dogs, but at-risk dogs can be protected with vaccination. The clinical history in the primary care office should routinely include questions about pets and occupational or other exposure to pet animals. Control and prevention of zoonoses are best achieved by enhancing communication between physicians and veterinarians to ensure patients know the risks of and how to prevent zoonoses in themselves, their pets, and other people.

PET and PET-CT. State of the art and future prospects

International Nuclear Information System (INIS)

Fanti, Stefano; Franchi, Roberto; Battista, Giuseppe; Monetti, Nino; Canini, Romeo

2005-01-01

Fluoro-deoxyglucose positron emission tomography (FDG PET) enables the in vivo study of tissue metabolism, and thus is able to identify malignant tumours as hypermetabolic lesions by an increase in tracer uptake. Many papers have demonstrated both the relevant impact of FDG PET on staging of many cancers and the superior accuracy of the technique compared with conventional diagnostic methods for pre-treatment evaluation, therapy response evaluation and relapse identification. In particular PET was found useful in identifying lymph nodal and metastatic spread. thus altering patient management in more than 30% of cases. PET images, however, provide limited anatomical data, which in regions such as the head and neck, mediastinum and pelvic cavity is a significant drawback. The exact localization of lesions may also be difficult in some cases, on the basis of PET images alone. The introduction of combined PET-computed tomography (PET-CT) scanners enables the almost simultaneous acquisition of transmission and emission images, thus obtaining optimal fusion images in a very short time. PET-CT fusion images enable lesions to be located, reducing false positive studies and increasing accuracy; the overall duration of examination may also be reduced. On the basis of both literature data and our experience we established the clinical indications when PET-CT may be particularly useful, in comparison with PET alone. It should also be underlined that the use of PET-CT is almost mandatory for new traces such as C-choline and C-methionine; these new tracers may be applied for studying tumours not assessable with FDG, such as prostate cancer. In conclusion PET-CT is at present the most advanced method for metabolic imaging, and is capable of precisely localizing and assessing tumours; fusion images reduce false positive and inconclusive studies, thus increasing diagnostic accuracy [it

Development of PET insert for simultaneous PET/MR imaging of human brain

Energy Technology Data Exchange (ETDEWEB)

Jung, Jiwoong; Choi, Yong; Jung, Jin Ho; Kim, Sangsu; Im, Ki Chun; Lim, Hyun Keong [Molecular Imaging Research & Education (MiRe) Laboratory, Department of Electronic Engineering, Sogang University, Seoul (Korea, Republic of); Oh, Changheun; Park, HyunWook; Cho, Gyuseong [Departments of Electrical Engineering and Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon (Korea, Republic of)

2014-07-29

Recently, there has been great interest on the development of combined PET/MR, which is a useful tool for both functional and anatomic imaging. The purpose of this study was to develop a MR compatible PET insert for simultaneous PET and MR imaging of human brain and to evaluate the performance of the hybrid PET-MRI. The PET insert consisted of 18 detector blocks arranged in a ring of 390 mm diameter with 60 mm axial FOV. Each detector block was composed of 4 × 4 matrix of detector modules, each of which consisted of a 4 × 4 array LYSO coupled to a 4 × 4 GAPD array. The PET gantry was shielded with gold-plated conductive fabric tapes. The charge signals of PET detector transferred via 4 m long flat cables were fed into the position decoder circuits (PDCs) and then transferred to FPGA-embedded DAQ modules. The PDCs and DAQ modules were enclosed in an aluminum box and located at the rear of the MR bore inside MRI room. 3-T human MRIs of two different vendors were used to evaluate the MR compatibility of developed PET insert. No significant changes of the PET performance and the homogeneity of MR images caused by the non-compatibility of PET-MRI were observed with the 2 different MRIs. The signal intensities of MR images were slightly degraded (<3.6%) with the both MRI systems. The difference between independently and simultaneously acquired PET images of brain phantom was negligibly small (<4.3%). High quality simultaneous brain PET and MRI of 3 normal volunteers were successfully acquired. Experimental results indicate that the high performance compact and lightweight PET insert for hybrid PET/MRI, which could be utilized with the MRI from various manufactures, can be developed using GAPD arrays and charge signal transmission method proposed in this study.

Estimativa de consumo de sodio pela populacao brasileira, 2008-2009

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Flavio Sarno

2013-06-01

Full Text Available OBJETIVO: Atualizar estimativas sobre consumo de sódio no Brasil. MÉTODOS: Foram utilizados dados da Pesquisa de Orçamentos Familiares 2008-2009. Realizou-se a conversão em nutrientes dos registros de aquisição de alimentos dos domicílios brasileiros por meio de tabelas de composição de alimentos. Foram calculadas a disponibilidade média de sódio/pessoa/dia e a disponibilidade média ajustada para um consumo energético diário de 2.000 kcal. Calculou-se a contribuição de grupos de alimentos selecionados para o total de sódio disponível para consumo no domicílio e comparou-se com aqueles da Pesquisa de Orçamentos Familiares 2002-2003. RESULTADOS: A quantidade diária de sódio disponível para consumo nos domicílios brasileiros foi de 4,7 g para ingestão diária de 2.000 kcal, mantendo-se mais de duas vezes superior ao limite recomendado de ingestão desse nutriente. A maior parte do sódio disponível para consumo provém do sal de cozinha e de condimentos à base de sal (74,4%, mas a fração proveniente de alimentos processados com adição de sal aumentou linear e intensamente com o poder aquisitivo domiciliar (12,3% do total de sódio no quinto inferior da distribuição da renda por pessoa e 27,0% no quinto superior. Observou-se redução na contribuição de sal e condimentos à base de sal (76,2% para 74,4% e dos alimentos in natura ou processados sem adição de sal (6,6% para 4,8% e aumento dos alimentos processados com adição de sal (15,8% para 18,9% e dos pratos prontos (1,4% para 1,6% na comparação com a Pesquisa de Orçamentos Familiares 2002-2003. CONCLUSÕES: O consumo de sódio no Brasil mantém-se em níveis acima da recomendação máxima para esse nutriente em todas as macrorregiões e classes de renda brasileiras. Observou-se estabilidade na disponibilidade domiciliar total de sódio e aumento na fração proveniente dos alimentos processados com adição de sal e dos pratos prontos, na comparação de

Drogas ilegales en escolares de Lima y Callao: factores familiares asociados a su consumo

Directory of Open Access Journals (Sweden)

César Gutiérrez

2009-12-01

Full Text Available Introducción: El consumo de drogas es un problema de salud pública a nivel mundial; se viene incrementando en países en vías de desarrollo. Las drogas ilegales, como marihuana e inhalantes (terokal, PVC, benzina y/o acetona, son consumidas cada vez a edades más tempranas. Objetivo: Determinar las características epidemiológicas, personales, escolares y los factores de tipo familiar (involucramiento de los padres con las actividades de sus hijos que se asocian con el consumo de marihuana e inhalantes por los estudiantes de secundaria de Lima Metropolitana y Callao. Diseño: Estudio analítico y transversal. Lugar: Lima Metropolitana y Callao. Participantes: Cinco mil seiscientos cuarenta y siete estudiantes de 2°, 4° y 5° año de secundaria. Intervenciones: Revisión y análisis de la base de datos del estudio nacional "Prevención y consumo de drogas en estudiantes de secundaria", llevado a cabo por la Comisión Nacional para el Desarrollo y Vida sin Drogas, el año 2005. Resultados: La prevalencia de vida de consumo de drogas ilegales en estudiantes de secundaria de Lima Metropolitana y Callao fue de 5,9% (marihuana y 4,8% (inhalantes. El consumo de marihuana fue más frecuente en hombres (7,6% que en mujeres (2,71%, p<0,001. El consumo de marihuana e inhalantes fue significativamente más frecuente (p<0,001 en quienes no conviven con sus padres, en quienes tienen dos o más antecedentes de fracaso escolar, en quienes tienen frecuentes problemas de comportamiento en el colegio y en quienes se ‘hacen la vaca’ (ausentismo escolar. El tipo de colegio (público o privado no se asoció significativamente con el antecedente de consumo de marihuana e inhalantes. Los factores de riesgo hallados para el consumo de marihuana e inhalantes fueron: tener algún problema de comportamiento o disciplina durante los estudios, dos o más antecedentes de fracaso escolar y ‘hacerse la vaca’. Entre los factores de involucramiento familiar, fueron

PET/MRI and PET/CT in advanced gynaecological tumours: initial experience and comparison

Energy Technology Data Exchange (ETDEWEB)

Queiroz, Marcelo A.; Schulthess, Gustav von; Veit-Haibach, Patrick [University Hospital Zurich, Department Medical Radiology, Nuclear Medicine, Zurich (Switzerland); University Hospital Zurich, Department Medical Radiology, Diagnostic and Interventional Radiology, Zurich (Switzerland); University of Zurich, Zurich (Switzerland); Kubik-Huch, Rahel A.; Freiwald-Chilla, Bianka [Kantonsspital Baden AG, Department of Radiology, Baden (Switzerland); Hauser, Nik [Kantonsspital Baden AG, Department of Gynaecology, Baden (Switzerland); Froehlich, Johannes M. [Guerbet AG, Zurich (Switzerland)

2015-08-15

To compare the diagnostic accuracy of PET/MRI and PET/CT for staging and re-staging advanced gynaecological cancer patients as well as identify the potential benefits of each method in such a population. Twenty-six patients with suspicious or proven advanced gynaecological cancer (12 ovarian, seven cervical, one vulvar and four endometrial tumours, one uterine metastasis, and one primary peritoneal cancer) underwent whole-body imaging with a sequential trimodality PET/CT/MR system. Images were analysed regarding primary tumour detection and delineation, loco-regional lymph node staging, and abdominal/extra-abdominal distant metastasis detection (last only by PET/CT). Eighteen (69.2 %) patients underwent PET/MRI for primary staging and eight patients (30.8 %) for re-staging their gynaecological malignancies. For primary tumour delineation, PET/MRI accuracy was statistically superior to PET/CT (p < 0.001). Among the different types of cancer, PET/MRI presented better tumour delineation mainly for cervical (6/7) and endometrial (2/3) cancers. PET/MRI for local evaluation as well as PET/CT for extra-abdominal metastases had therapeutic consequences in three and one patients, respectively. PET/CT detected 12 extra-abdominal distant metastases in 26 patients. PET/MRI is superior to PET/CT for primary tumour delineation. No differences were found in detection of regional lymph node involvement and abdominal metastases detection. (orig.)

Consumo de tabaco y alcohol en una muestra en proceso de desahucio

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Humbelina Robles-Ortega

Full Text Available Resumen Introducción: En España, la actual crisis económica nos ha llevado a un lamentable fenómeno poco conocido hasta ahora: el proceso del desahucio. Nuestro objetivo ha sido evaluar hábitos poco saludables como el consumo del tabaco y alcohol en un grupo de granadinos/as en riesgo de perder su vivienda habitual. Método: Han participado 205 personas adultas (122 mujeres y 83 hombres a los que se les administró los ítems de hábitos relacionados con la salud de la Entrevista Andaluza de Salud 2011. Todos los participantes estaban vinculados a la Plataforma de Afectados por la Hipoteca Stop Desahucios de Granada. Resultados: Consumo de tabaco: observamos mayor porcentaje de fumadores a diario en hombres (54.22 %, personas que no viven en pareja y trabajadores. Las personas que han entrado en el proceso judicial fuman más cigarrillos al día (t = -1.944, p = .055 y perciben un aumento en el consumo de tabaco debido al proceso de desahucio (χ2 = 8.494, p = .037. Consumo de alcohol: encontramos mayor porcentaje en hombres χ2 = 10.005, p = .019 y en personas que no viven en pareja χ2 = 8.553, p = .036; los hombres perciben un mayor aumento en el consumo de alcohol debido al proceso de desahucio (χ2 = 20.375, p = .000. Conclusiones: El proceso de desahucio afecta negativamente a los hábitos relacionados con la salud por lo que debería priorizarse en las políticas de Salud Pública como una población de riesgo.

Comparative analysis of PET/CT and PET/MR image characteristics of head and neck squamous cell carcinoma%对比分析头颈部鳞状细胞癌PET/CT与PET/MR特征

Institute of Scientific and Technical Information of China (English)

白乐; 程勇; 唐勇进; 凌雪英

2017-01-01

Objective To investigate PET/CT and PET/MR characteristics of head and neck squamous cell carcinoma (HNSCC).Methods Totally 40 patients with HNSCC underwent whole body 18F-FDG PET/CT and MR scans of head and neck before anti-tumor treatment.PET positive lesions of HNSCC,including primary lesions and lymph nodes were evaluated by 2 radiologists independently.Then the imaging quality,fusion quality,lesion conspicuity and lesion characteristics were assessed based on PET/CT,PET/MR T1WI and PET/MR T2WI.Results Ninety PET positive lesions in all 40patients were evaluated,including 40 primary lesions and 50 lymph nodes.Similar imaging quality and fusion quality of PET/CT,PET/MR T1WI and PET/MR T2WI were obtained without statistical difference (both P＞0.05).For the lesion conspicuity,PET/MR T1WI and PET/MR T2WI demonstrated significantly better than PET/CT in positive primary lesions and lymph nodes (all P＜0.05).For the characteristics of positive primary lesions,PET/MR T2WI provided more information than PET/CT in 29 lesions,equal to PET/CT in 4 lesions,and less than PET/CT in 7 lesions.Conclusion The application of PET/MR in HNSCC is feasible,being superior to PET/CT in indication of lesions in head and neck area.%目的 探讨头颈部鳞状细胞癌(HNSCC)的PET/CT及PET/MR特征.方法 纳入未经抗肿瘤治疗的头颈部鳞状细胞癌患者40例,所有患者均接受PET/CT及头颈部MR检查.由2名观察者独立观察PET阳性病灶,包括阳性原发灶及阳性淋巴结;并对PET/CT、PET/MR T1WI及PET/MR T2WI的图像质量、融合准确度、病灶清晰度、病灶特征等进行评分.分析2名观察者间的一致性.结果 40例患者共90个PET阳性病灶,包括阳性原发灶40个、阳性淋巴结50个.PET/CT、PET/MR T1WI及PET/MR T2WI在图像质量及融合准确度方面差异均无统计学意义(P均＞0.05);在显示阳性原发灶及阳性淋巴结的清晰度方面,PET/MR T1WI及PET/MR T2WI均优于PET/CT(P均＜0.05).40个阳性原发灶中,PET

Present and future of PET and PET/CT in gynaecologic malignancies

International Nuclear Information System (INIS)

Musto, Alessandra; Rampin, Lucia; Nanni, Cristina; Marzola, Maria Cristina; Fanti, Stefano; Rubello, Domenico

2011-01-01

Objectives: To review the published data in literature on patients affected by gynaecological malignancies to establish the role of 18 F-FDG positron emission tomography (PET) and PET/CT in comparison to conventional imaging (CI). Materials and methods: All papers specifically addressed to the role of 18 F-FDG PET and PET/CT in gynaecological malignancies published on PubMed/Medline, in abstracts from the principal international congresses, in the guidelines from national Societies that had appeared in literature until November 2009 were considered for the purpose of the present study. Results and conclusions: The use of 18 F-FDG PET, and even more of 18 F-FDG PET/CT, is increasing in the follow up of patients with gynaecologic malignancies and suspected recurrent disease: there is evidence in the literature that 18 F-FDG PET/CT has a higher sensitivity than CI in depicting occult metastatic spread. An interesting issue is represented by patients with ovarian cancer with an increase of the specific biomarker, CA-125, and negative/inconclusive findings at CI. The use of 18 F-FDG PET in differential diagnosis and staging is more controversial, but there is some evidence that a baseline PET examination performed before commencing therapy, for staging purpose, is also useful to evaluate the response to chemoradiation treatment. In several papers it has been suggested a relevant role of 18 F-FDG PET/CT in evaluating the entity of response to treatment and therefore to plan the subsequent therapeutic strategy.

The Role of mPOS System in Process Change and Strategy Change: A Situated Change Perspective

OpenAIRE

Yao Chin Lin; Nhu-Hang Ha; Kuo-Sung Lin

2015-01-01

The purpose of this study is to revisit the relationship among information technology (IT), Process, and Strategy. We focus on the impact of mobile Point of Sales (mPOS) on changing of operational processes in the restaurant industry. This study investigates the changing of IT strategy and service strategy. The research model was developed based on the literature (strategic alignment model and situated change perspective) and inputs from the restaurant industry and IT experts. The data of thi...

Consumo de cine-video : Una investigación empírica

OpenAIRE

Wallace, Santiago; Muñoz Cobeñas, Leticia Amelia; Rodríguez, Pablo Gustavo; Silva, Celia; Cabutti, Marcela

1998-01-01

Este trabajo recoge parte de los resultados del proyecto de investigación "Las industrias culturales hoy: consumo de cine-video y su relación con las políticas culturales (La Plata)", realizado durante los años 1994 y 1995 en el marco del Programa de Incentivos. Se intentó, en base a los objetivos propuestos analizar las modalidades de elección y consumo al momento de ver cine en el ámbito hogareño. Facultad de Bellas Artes

Consumo de Drogas y Violencia en el Noviazgo en Estudiantes Universitarios del Sur de Chile

OpenAIRE

Saldivia, Claudia; Vizcarra, Beatriz

2012-01-01

La presente investigación tuvo por objetivo describir la relación entre consumo de drogas y violencia en el noviazgo, en jóvenes universitarios del sur de Chile. La muestra estuvo compuesta por 205 estudiantes, quienes respondieron a dos instrumentos: un cuestionario de detección de consumo problemático de alcohol y otras drogas y un cuestionario de violencia de pareja en jóvenes. Los resultados obtenidos muestran una relación significativa y directa entre consumo de drogas y violencia en el ...

La afinidad electiva entre consumo cultural y percepción sociocultural: el caso de Chile

OpenAIRE

Tomás Peters Núñez

2010-01-01

El presente artículo demuestra la afinidad electiva entre consumo cultural y percepción sociocultural. A partir de los datos de la Encuesta de participación y consumo cultural 2009, de Chile, se muestra evidencia estadística de que el consumo cultural mantiene una afinidad electiva con las valoraciones democráticas, políticas, sociales y ciudadanas de los consumidores. Esta tendencia también es observable entre las personas que pertenecen a segmentos de la población con bajos ingresos económi...

Verso il consumo sostenibile: i prodotti biologici nelle abitudini alimentari degli italiani

OpenAIRE

Scalvedi, Maria Luisa

2015-01-01

Scegliere di consumare in modo sostenibile significa passare ad un nuovo modello di consumo. Tale modello richiede una maggiore consapevolezza e responsabilità da parte dei consumatori, unite all'adozione di nuovi stili di vita e di scelte d’acquisto, che permettano il raggiungimento di elevati livelli di benessere nel rispetto dell'ambiente. Un notevole sforzo è stato compiuto recentemente dai policy maker per incoraggiare il consumo sostenibile quali implementazioni dello sviluppo sostenibi...

Head and neck imaging with PET and PET/CT: artefacts from dental metallic implants

International Nuclear Information System (INIS)

Goerres, Gerhard W.; Hany, Thomas F.; Kamel, Ehab; Schulthess von, Gustav K.; Buck, Alfred

2002-01-01

Germanium-68 based attenuation correction (PET Ge68 ) is performed in positron emission tomography (PET) imaging for quantitative measurements. With the recent introduction of combined in-line PET/CT scanners, CT data can be used for attenuation correction. Since dental implants can cause artefacts in CT images, CT-based attenuation correction (PET CT ) may induce artefacts in PET images. The purpose of this study was to evaluate the influence of dental metallic artwork on the quality of PET images by comparing non-corrected images and images attenuation corrected by PET Ge68 and PET CT . Imaging was performed on a novel in-line PET/CT system using a 40-mAs scan for PET CT in 41 consecutive patients with high suspicion of malignant or inflammatory disease. In 17 patients, additional PET Ge68 images were acquired in the same imaging session. Visual analysis of fluorine-18 fluorodeoxyglucose (FDG) distribution in several regions of the head and neck was scored on a 4-point scale in comparison with normal grey matter of the brain in the corresponding PET images. In addition, artefacts adjacent to dental metallic artwork were evaluated. A significant difference in image quality scoring was found only for the lips and the tip of the nose, which appeared darker on non-corrected than on corrected PET images. In 33 patients, artefacts were seen on CT, and in 28 of these patients, artefacts were also seen on PET imaging. In eight patients without implants, artefacts were seen neither on CT nor on PET images. Direct comparison of PET Ge68 and PET CT images showed a different appearance of artefacts in 3 of 17 patients. Malignant lesions were equally well visible using both transmission correction methods. Dental implants, non-removable bridgework etc. can cause artefacts in attenuation-corrected images using either a conventional 68 Ge transmission source or the CT scan obtained with a combined PET/CT camera. We recommend that the non-attenuation-corrected PET images also be

Prevalencia del consumo de sustancias en estudiantes de bachillerato de Pamplona, Colombia: una comparación por género

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Andrés Enrique Zárate Pradilla, Psicol* Diana María Catalina Prada Uribe, MD* Sandra Licette Padilla Sarmiento, Psicol* Germán Eduardo Rueda-Jaimes, MD**

2009-04-01

Full Text Available Introducción: el consumo de sustancias trae consecuencias en la salud de los adolescentes a corto y largo plazo. Objetivo: determinar la prevalencia del consumo de sustancias en niños y adolescentes escolarizados de Pamplona, Colombia. Método: se realizó un estudio trasversal con una muestra de 1.647 estudiantes de bachillerato seleccionados aleatoriamente. Ellos diligenciaron un cuestionario auto administrado sobre consumo de sustancias legales e ilegales. Resultados: la edad promedio fue 14,6 años (DE 1,99; 52,7% eran hombres. La prevalencia vital para el consumo de sustancias legales (sin incluir el alcohol y tabaco fue 3,96% y la prevalencia vital de consumo de las ilegales fue 5,03%. La prevalencia de consumo diario de cigarrillo durante el último mes fue 4,9%. El uso de sustancias en hombres tuvo una mayor prevalencia que en mujeres. La edad de inicio en el consumo de cualquier sustancia estuvo entre los 10 y 13 años. Conclusión: el consumo de sustancias legales e ilegales por parte de estudiantes de bachillerato de Pamplona fue más alto que el encontrado en otras ciudades del país con población similar. Se encontró la emergencia del consumo de heroína y popper en niños y adolescentes escolarizados. [Zárate AE, Prada DMC, Padilla SL, Rueda GE. Prevalencia del consumo de sustancias en estudiantes de bachillerato de Pamplona, Colombia: una comparación por género. MedUNAB 2009; 12:07-13].

Familia: Consumo y ahorro

OpenAIRE

Navarro López, Manuel

2003-01-01

Es obvio que el contenido de este trabajo deberá moverse entre la sociología de la familia y la del consumo, aunque solo sea como referentes teóricos. Sin embargo, tales vínculos deberán ser solo puntos de apoyo para analizar sin ataduras académicas una visión de los comportamientos económicos que tienen su localización primaria en la familia. Consecuentemente, tendremos que hacer una descripción de esos comportamientos y sus contenidos, su evolución y su diversificación, retomando los motivo...

Consumo de tabaco en adolescentes y jóvenes de México que no estudian y no trabajan

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Jorge A. Villatoro Velázquez

2015-05-01

Full Text Available Introducción: la falta de oportunidades de estudio o trabajo incrementa la vulnerabilidad de los jóvenes, quienes ante la inestabilidad pueden iniciarse en el consumo de tabaco o de otras sustancias adictivas. Objetivo: analizar cómo es el consumo de tabaco entre grupos de adolescentes y jóvenes que sólo estudian, sólo trabajan, estudian y trabajan, o no estudian ni trabajan. Método: se tomó una muestra nacional de 6 mil 72 jóvenes de 12 a 25 años con datos que provienen de la Encuesta Nacional de Adicciones 2011, con un diseño aleatorio, probabilístico y polietápico. Se midió el consumo alguna vez, en el último año y en el último mes, así como el uso diario de tabaco y el consumo de más de 100 cigarros. Resultados: los hombres de 12 a 17 años que no estudian y no trabajan tienen un consumo de tabaco mayor que aquellos que sólo estudian. Tanto en hombres como en mujeres de 12 a 25 años, quienes trabajan presentan un consumo mayor de tabaco que los jóvenes que sólo estudian. Discusión y conclusiones: el riesgo de consumo de sustancias no se da únicamente entre los jóvenes que no estudian y no trabajan, sino también en aquellos que estando en edad de estudiar, se encuentran laborando, por lo que es importante reforzar y actualizar los programas de prevención del consumo de tabaco que han permitido contener, y en algunos casos disminuir, los niveles de consumo de la población.

{sup 18}F-FDG PET and PET/CT in Burkitt's lymphoma

Energy Technology Data Exchange (ETDEWEB)

Karantanis, Dimitrios, E-mail: dkarantanis@nuclmed.ne [Division of Nuclear Medicine, Department of Radiology, Mayo Clinic, Rochester, MN (United States); Durski, Jolanta M.; Lowe, Val J.; Nathan, Mark A.; Mullan, Brian P. [Division of Nuclear Medicine, Department of Radiology, Mayo Clinic, Rochester, MN (United States); Georgiou, Evangelos [Medical Physics Department, Medical School, University of Athens (Greece); Johnston, Patrick B. [Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN (United States); Wiseman, Gregory A. [Division of Nuclear Medicine, Department of Radiology, Mayo Clinic, Rochester, MN (United States)

2010-07-15

Objective: To explore the value of {sup 18}F fluorodeoxy-glucose (FDG) positron emission tomography (PET) in Burkitt's lymphoma. Methods: All Burkitt's lymphoma patients referred for FDG PET or FDG PET/computed tomography (CT) exams at our institution from June 2003 to June 2006 were included. Selected patients were followed and clinical information was reviewed retrospectively. Results from FDG PET-PET/CT, as blindly reviewed by a consensus of two experienced readers, were compared with the status of the disease as determined by other laboratory, clinical and imaging exams and clinical follow-up. FDG PET-PET/CT results were classified as true positive or negative and false positive or negative. The degree of FDG uptake in the positive lesions was semiquantified as maximum standard uptake value (SUVmax). Results: Fifty-seven FDG PET-PET/CT exams were done in 15 patients. Seven exams were done for initial staging, 8 during and 14 after the completion of therapy, and 28 for disease surveillance. For nodal disease FDG PET-PET/CT was true positive in 8, true negative in 47 and false positive in 2 exams (sensitivity 100%, specificity 96%). For extranodal disease FDG PET-PET/CT was true positive in 6, true negative in 48 and false positive in 3 exams (sensitivity 100%, specificity 94%). The mean SUVmax for the positive nodal lesions was 15.7 (range 6.9-21.7, median 18.5) and for extranodal lesions was 14.2 (range 6.2-24.3, median 12.4). Conclusions: FDG PET-PET/CT is sensitive for the detection of viable disease in Burkitt's lymphoma. Affected areas demonstrated high degree of uptake that was reversible upon successful implementation of treatment.

Standardised uptake values from PET/CT images: comparison with conventional attenuation-corrected PET

International Nuclear Information System (INIS)

Souvatzoglou, M.; Ziegler, S.I.; Martinez, M.J.; Dzewas, G.; Schwaiger, M.; Bengel, F.; Busch, R.

2007-01-01

In PET/CT, CT-derived attenuation factors may influence standardised uptake values (SUVs) in tumour lesions and organs when compared with stand-alone PET. Therefore, we compared PET/CT-derived SUVs intra-individually in various organs and tumour lesions with stand-alone PET-derived SUVs. Thirty-five patients with known or suspected cancer were prospectively included. Sixteen patients underwent FDG PET using an ECAT HR+scanner, and subsequently a second scan using a Biograph Sensation 16PET/CT scanner. Nineteen patients were scanned in the reverse order. All images were reconstructed with an iterative algorithm (OSEM). Suspected lesions were grouped as paradiaphragmatic versus distant from the diaphragm. Mean and maximum SUVs were also calculated for brain, lung, liver, spleen and vertebral bone. The attenuation coefficients (μ values) used for correction of emission data (bone, soft tissue, lung) in the two data sets were determined. A body phantom containing six hot spheres and one cold cylinder was measured using the same protocol as in patients. Forty-six lesions were identified. There was a significant correlation of maximum and mean SUVs derived from PET and PET/CT for 14 paradiaphragmatic lesions (r=0.97 respectively; p<0.001 respectively) and for 32 lesions located distant from the diaphragm (r=0.87 and r=0.89 respectively; p<0.001 respectively). No significant differences were observed in the SUVs calculated with PET and PET/CT in the lesions or in the organs. In the phantom, radioactivity concentration in spheres calculated from PET and from PET/CT correlated significantly (r=0.99; p<0.001). SUVs of cancer lesions and normal organs were comparable between PET and PET/CT, supporting the usefulness of PET/CT-derived SUVs for quantification of tumour metabolism. (orig.)

Consumo de carnes por adultos do sul do Brasil: um estudo de base populacional

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Bruna Celestino Schneider

2014-08-01

Full Text Available Estudo transversal de base populacional que avaliou indivíduos com 20 anos ou mais, residentes na zona urbana de Pelotas, Rio Grande do Sul, que objetivou descrever a frequência do consumo de carnes e o hábito de consumi-las com excesso de gordura. Foi avaliado, no último ano, o consumo de carnes vermelhas (com osso, bife e carne moída, brancas (frango e peixes, vísceras e embutidos. Dos 2,730 entrevistados, 99,1% (IC95%, 98,7 - 99,5 consumiu algum tipo de carne no último ano, sendo que, em torno de 32% referiu consumo diário. A prevalência do consumo de carnes vermelhas (99,3%, IC95%, 98,9 - 99,6 e brancas (99,4% IC95%, 99,1 - 99,7 foi semelhante. A carne de frango foi a mais consumida (98,0%, IC95%, 97,4 - 98,5, enquanto que as vísceras, as menos (59,1% IC95% 56,4 - 61,7. Os embutidos, consumidos por 85,5% (IC95%, 83,7 - 87,2 das pessoas, apresentaram a maior prevalência de consumo diário (16,6%. As carnes com excesso de gordura foram consumidas por 52,3% (IC95%, 49,8 - 54,8 dos adultos, principalmente homens, e pessoas de menor escolaridade e nível econômico.

Consumo de alimentos fora do domicílio no Brasil

Directory of Open Access Journals (Sweden)

Ilana Nogueira Bezerra

2013-02-01

Full Text Available OBJETIVO: Analisar características do consumo de alimentos fora do domicílio no Brasil. MÉTODOS: Foram analisados dados do Inquérito Nacional de Alimentação, conduzido com 34.003 indivíduos acima de dez anos de idade em 24% dos domicílios participantes da Pesquisa de Orçamentos Familiares em 2008-2009. O consumo de alimentos e bebidas foi coletado por meio de registros dos alimentos consumidos, tipo de preparação, quantidade, horário e fonte do alimento (dentro ou fora de casa. A frequência de indivíduos que consumiu alimentos fora do domicílio foi calculada segundo faixas de idade, sexo, faixas de renda, área de localização do domicílio, tamanho da família, presença de criança no domicílio e idade do chefe do domicílio no Brasil e em cada região brasileira. Para as análises, considerou-se o peso amostral específico do inquérito e incorporou-se o efeito do desenho amostral. RESULTADOS: O consumo de alimentos fora do domicílio no Brasil foi reportado por 40% dos entrevistados, variando de 13% entre os idosos da região Sul a 51% entre os adolescentes da região Sudeste. Esse percentual diminuiu com a idade e aumentou com a renda em todas as regiões brasileiras; foi maior entre os homens e na área urbana. Os grupos de alimentos com maior percentual de consumo fora de casa foram bebidas alcoólicas, salgadinhos fritos e assados, pizza, refrigerantes e sanduíches. CONCLUSÕES: A alimentação fora de casa apresenta predominância de alimentos de alto conteúdo energético e pobre conteúdo nutricional, indicando que o consumo de alimentos fora do domicílio deve ser considerado nas ações de saúde pública voltadas para a melhoria da alimentação dos brasileiros.

Present and future of PET and PET/CT in gynaecologic malignancies

Energy Technology Data Exchange (ETDEWEB)

Musto, Alessandra [Department of Nuclear Medicine, PET Center, Policlinico Sant' Orsola Malpighi, Bologna University, Bologna (Italy); Rampin, Lucia [Department of Nuclear Medicine, PET Center, Radiology, Medical Physics, Santa Maria della Misericordia Hospital, viale tre martiri 140, 45100 Rovigo (Italy); Nanni, Cristina [Department of Nuclear Medicine, PET Center, Policlinico Sant' Orsola Malpighi, Bologna University, Bologna (Italy); Marzola, Maria Cristina [Department of Nuclear Medicine, PET Center, Radiology, Medical Physics, Santa Maria della Misericordia Hospital, viale tre martiri 140, 45100 Rovigo (Italy); Fanti, Stefano [Department of Nuclear Medicine, PET Center, Policlinico Sant' Orsola Malpighi, Bologna University, Bologna (Italy); Rubello, Domenico, E-mail: domenico.rubello@libero.it [Department of Nuclear Medicine, PET Center, Radiology, Medical Physics, Santa Maria della Misericordia Hospital, viale tre martiri 140, 45100 Rovigo (Italy)

2011-04-15

Objectives: To review the published data in literature on patients affected by gynaecological malignancies to establish the role of {sup 18}F-FDG positron emission tomography (PET) and PET/CT in comparison to conventional imaging (CI). Materials and methods: All papers specifically addressed to the role of {sup 18}F-FDG PET and PET/CT in gynaecological malignancies published on PubMed/Medline, in abstracts from the principal international congresses, in the guidelines from national Societies that had appeared in literature until November 2009 were considered for the purpose of the present study. Results and conclusions: The use of {sup 18}F-FDG PET, and even more of {sup 18}F-FDG PET/CT, is increasing in the follow up of patients with gynaecologic malignancies and suspected recurrent disease: there is evidence in the literature that {sup 18}F-FDG PET/CT has a higher sensitivity than CI in depicting occult metastatic spread. An interesting issue is represented by patients with ovarian cancer with an increase of the specific biomarker, CA-125, and negative/inconclusive findings at CI. The use of {sup 18}F-FDG PET in differential diagnosis and staging is more controversial, but there is some evidence that a baseline PET examination performed before commencing therapy, for staging purpose, is also useful to evaluate the response to chemoradiation treatment. In several papers it has been suggested a relevant role of {sup 18}F-FDG PET/CT in evaluating the entity of response to treatment and therefore to plan the subsequent therapeutic strategy.

Quantitative and Visual Assessments toward Potential Sub-mSv or Ultrafast FDG PET Using High-Sensitivity TOF PET in PET/MRI.

Science.gov (United States)

Behr, Spencer C; Bahroos, Emma; Hawkins, Randall A; Nardo, Lorenzo; Ravanfar, Vahid; Capbarat, Emily V; Seo, Youngho

2018-06-01

Newer high-performance time-of-flight (TOF) positron emission tomography (PET) systems have the capability to preserve diagnostic image quality with low count density, while maintaining a high raw photon detection sensitivity that would allow for a reduction in injected dose or rapid data acquisition. To assess this, we performed quantitative and visual assessments of the PET images acquired using a highly sensitive (23.3 cps/kBq) large field of view (25-cm axial) silicon photomultiplier (SiPM)-based TOF PET (400-ps timing resolution) integrated with 3 T-MRI in comparison to PET images acquired on non-TOF PET/x-ray computed tomography (CT) systems. Whole-body 2-deoxy-2-[ 18 F]fluoro-D-glucose ([ 18 F]FDG) PET/CT was acquired for 15 patients followed by whole body PET/magnetic resonance imaging (MRI) with an average injected dose of 325 ± 84 MBq. The PET list mode data from PET/MRI were reconstructed using full datasets (4 min/bed) and reduced datasets (2, 1, 0.5, and 0.25 min/bed). Qualitative assessment between PET/CT and PET/MR images were made. A Likert-type scale between 1 and 5, 1 for non-diagnostic, 3 equivalent to PET/CT, and 5 superior quality, was used. Maximum and mean standardized uptake values (SUV max and SUV mean ) of normal tissues and lesions detected were measured and compared. Mean visual assessment scores were 3.54 ± 0.32, 3.62 ± 0.38, and 3.69 ± 0.35 for the brain and 3.05 ± 0.49, 3.71 ± 0.45, and 4.14 ± 0.44 for the whole-body maximum intensity projections (MIPs) for 1, 2, and 4 min/bed PET/MR images, respectively. The SUV mean values for normal tissues were lower and statistically significant for images acquired at 4, 2, 1, 0.5, and 0.25 min/bed on the PET/MR, with values of - 18 ± 28 % (p PET/MR datasets. High-sensitivity TOF PET showed comparable but still better visual image quality even at a much reduced activity in comparison to lower-sensitivity non-TOF PET. Our data translates to a seven times

Imaging with 124I in differentiated thyroid carcinoma: is PET/MRI superior to PET/CT?

International Nuclear Information System (INIS)

Binse, I.; Poeppel, T.D.; Ruhlmann, M.; Gomez, B.; Bockisch, A.; Rosenbaum-Krumme, S.J.; Umutlu, L.

2016-01-01

The aim of this study was to compare integrated PET/CT and PET/MRI for their usefulness in detecting and categorizing cervical iodine-positive lesions in patients with differentiated thyroid cancer using 124 I as tracer. The study group comprised 65 patients at high risk of iodine-positive metastasis who underwent PET/CT (low-dose CT scan, PET acquisition time 2 min; PET/CT 2 ) followed by PET/MRI of the neck 24 h after 124 I administration. PET images from both modalities were analysed for the numbers of tracer-positive lesions. Two different acquisition times were used for the comparisons, one matching the PET/CT 2 acquisition time (2 min, PET/MRI 2 ) and the other covering the whole MRI scan time (30 min, PET/MRI 30 ). Iodine-positive lesions were categorized as metastasis, thyroid remnant or inconclusive according to their location on the PET/CT images. Morphological information provided by MRI was considered for evaluation of lesions on PET/MRI and for volume information. PET/MRI 2 detected significantly more iodine-positive metastases and thyroid remnants than PET/CT 2 (72 vs. 60, p = 0.002, and 100 vs. 80, p = 0.001, respectively), but the numbers of patients with at least one tumour lesion identified were not significantly different (21/65 vs. 17/65 patients). PET/MRI 30 tended to detect more PET-positive metastases than PET/MRI 2 (88 vs. 72), but the difference was not significant (p = 0.07). Of 21 lesions classified as inconclusive on PET/CT, 5 were assigned to metastasis or thyroid remnant when evaluated by PET/MRI. Volume information was available in 34 % of iodine-positive metastases and 2 % of thyroid remnants on PET/MRI. PET/MRI of the neck was found to be superior to PET/CT in detecting iodine-positive lesions. This was attributed to the higher sensitivity of the PET component, Although helpful in some cases, we found no substantial advantage of PET/MRI over PET/CT in categorizing iodine-positive lesions as either metastasis or thyroid remnant

Factores socioculturales y consumo de drogas entre estudiantes universitarios costarricenses

Directory of Open Access Journals (Sweden)

Jaime Alonso Caravaca Morera

2015-01-01

Full Text Available Investigación cuantitativa de tipo descriptiva-exploratoria, con diseño transversal que examinó el efecto moderador de ciertos factores socio-culturales en el consumo de drogas entre estudiantes universitarios en San José, Costa Rica. La muestra fue conformada por 126 mujeres y 124 hombres de una universidad pública de forma no probabilística. Fue elaborado un cuestionario con cinco escalas ya validadas, que interrogaba sobre la influencia del grupo de pares, las relaciones familiares, el entretenimiento, la espiritualidad y el consumo de drogas. Se utilizó el programa SPSS versión 18 para el análisis estadístico. Se estableció que el 98,4% de los estudiantes reportaron tener por lo menos un amigo que consumía drogas, las drogas más consumidas fueron alcohol, tabaco y marihuana. Se estableció asociación significativa entre algunos factores académicos y culturales con el consumo de drogas legales e ilegales. Se concluye que deben ser implementadas estrategias preventivas considerando la influencia de los factores culturales entre los estudiantes universitarios.

Administrador de presentación para jPOS (plataforma JAVA para transacciones electrónicas)

OpenAIRE

Paoletti, Jerónimo

2010-01-01

En los últimos años, una de las áreas de negocios que más se ha expandido es la de las transacciones electrónicas financieras. En este marco ha aparecido jPOS, una biblioteca / framework OpenSource desarrollado en Java y basado en el protocolo ISO-8583, que puede ser personalizado y extendido para implementar transacciones electrónicas de todo tipo (incluyendo financieras). Los proyectos de esta índole suelen estar acompañados de información complementaria vinculada al negocio abordado. Dicha...

Práticas e consumos dos jovens portugueses em ambientes digitais

OpenAIRE

Amaral, Inês; Reis, Bruno Carriço; Lopes, Paula; Quintas, Célia

2017-01-01

Na cultura juvenil, as lógicas de mobilidade, multiscreen e multitarefa permitem equacionar novas práticas mediáticas numa era de convergência das plataformas digitais e dos consumos em cross-media. Neste artigo, descrevemos indicadores de atividades online de jovens portugueses com o objetivo de analisar as suas práticas mediáticas digitais e os consumos em rede que decorrem da apropriação dos recursos técnicos. O estudo empírico foi operacionalizado com recurso ao inquérito por questi...

Magnetic Resonance-based Motion Correction for Quantitative PET in Simultaneous PET-MR Imaging.

Science.gov (United States)

Rakvongthai, Yothin; El Fakhri, Georges

2017-07-01

Motion degrades image quality and quantitation of PET images, and is an obstacle to quantitative PET imaging. Simultaneous PET-MR offers a tool that can be used for correcting the motion in PET images by using anatomic information from MR imaging acquired concurrently. Motion correction can be performed by transforming a set of reconstructed PET images into the same frame or by incorporating the transformation into the system model and reconstructing the motion-corrected image. Several phantom and patient studies have validated that MR-based motion correction strategies have great promise for quantitative PET imaging in simultaneous PET-MR. Copyright © 2017 Elsevier Inc. All rights reserved.

TRIBO DE CONSUMO DE ANIMES: O ANIME COMO UM TOTEM

OpenAIRE

Bruno Alves Catão; Claudia Rosa Acevedo; Eduardo Correa de Godoy

2017-01-01

O presente estudo é uma análise etnográfica das tribos de animes, com o objetivo de desvendar os valores, as práticas de consumo, a organização, o comportamento e a cultura da tribo. Utilizamos registros de vídeo, fotos e anotações de campo para coletar as informações da pesquisa de observação participante. Concluímos que os animes influenciam os estilos visuais, hábitos e padrões de consumo dos integrantes. O anime é o centro da atenção dos jovens. É uma espécie de “totem” da tribo de consum...

A culpa das mães como antecedente do consumo

OpenAIRE

Battistella-Lima, Suzana Valente

2015-01-01

A culpa, uma emoção de valência negativa, é objeto de interesse da literatura científica em comportamento do consumidor desde os anos 1990. Um grupo de pessoas especialmente susceptível ao sentimento de culpa são as mães, e o pressuposto desta dissertação é que esta emoção influencia suas decisões de consumo. O objetivo aqui é investigar se a culpa pode ser um antecedente do consumo, e para isso a pesquisa foi realizada por meio de métodos mistos sequenciais com mães de crianças entre 3 e 12 ...

DETERMINACIÓN DE LOS ÍNDICES DE CONSUMO ENERGÉTICO EN UNA PLANTA DE PRODUCTOS LÁCTEOS.

Directory of Open Access Journals (Sweden)

Luis Cruz Viera

2011-02-01

Full Text Available El objetivo del trabajo es evaluar los índices de consumo energético en una planta de productos lácteos. Se elaboraron los cronogramas de los consumos de vapor y energía eléctrica en las líneas tecnológicas de leche, yogurt y crema, lo que permitió la caracterización de los procesos a partirdel consumo de estos portadores energéticos. Se determinaron los consumos de combustible y energía eléctrica técnicamente requeridos. La energía eléctrica se correspondió con el consumo actual mientras que el consumo de combustible técnicamente requerido resultó inferior al realmente consumido en la planta. Se realiza un análisis de este comportamiento y se establecen recomendaciones para disminuir el consumo de vapor. Se reportan los índices de consumo actual  y técnicamente requerido así como el ahorro que significaría el logro de este ultimo.  Evaluating the energetic consumption indexes in a dairy product plant is the objective of this paper. The corresponding chronograms of vapor and electric energy consumptions in the technological lines of milk, yogurt and cream were made. It allowed the characterization of the processes according to this source of energy. The technically required consumptions of electric energy and fuel were determined. The former was equal to the consumption at present whereas the later was lower than the fuel truly consumed in the plant. An analysis of this behavior is made and recommendations for diminishing the fuel consumption are established.The present consumption indexes, the technically required ones and the economical saving are reported.

Sensory analysis of pet foods.

Science.gov (United States)

Koppel, Kadri

2014-08-01

Pet food palatability depends first and foremost on the pet and is related to the pet food sensory properties such as aroma, texture and flavor. Sensory analysis of pet foods may be conducted by humans via descriptive or hedonic analysis, pets via acceptance or preference tests, and through a number of instrumental analysis methods. Sensory analysis of pet foods provides additional information on reasons behind palatable and unpalatable foods as pets lack linguistic capabilities. Furthermore, sensory analysis may be combined with other types of information such as personality and environment factors to increase understanding of acceptable pet foods. Most pet food flavor research is proprietary and, thus, there are a limited number of publications available. Funding opportunities for pet food studies would increase research and publications and this would help raise public awareness of pet food related issues. This mini-review addresses current pet food sensory analysis literature and discusses future challenges and possibilities. © 2014 Society of Chemical Industry.

The application of PET and PET-CT in cervical cancer

International Nuclear Information System (INIS)

Huang Jianmin; Pan Liping; Li Dongxue

2007-01-01

Cervical cancer is the common malignancies in woman, 18 F-fluorodeoxyglucose ( 18 F-FDG) PET is a well-established method for detecting, staging, cancer recurrence, therapeutic response and prognosis of cervical cancer. PET-CT can accurately locate the anatomical sites of tracer uptake and improve the diagnostic accuraccy of PET. (authors)

The petit rat (pet/pet), a new semilethal mutant dwarf rat with thymic and testicular anomalies.

Science.gov (United States)

Chiba, Junko; Suzuki, Katsushi; Suzuki, Hiroetsu

2008-12-01

The petit rat (pet/pet) is a recently discovered semilethal mutant dwarf. The neonatal pet/pet rats had a low body weight and small thymus and testis. During the first 3 d after birth, 50% of the male and 80% of the female pet/pet pups were lost or found dead. Surviving pet/pet rats showed marked retardation of postnatal growth, and their body weights were 41% (female rats) and 32% (male rats) of those of normal rats at the adult stage. The pet/pet rats exhibited proportional dwarfism, and their longitudinal bones were shorter than those of controls without skeletal malformations. Most organs of male pet/pet rats, especially the thymus, testis, adipose tissue surrounding the kidney, and accessory sex organs, weighed markedly less at 140 d of age than did those of their normal counterparts. The thymus of pet/pet rats was small with abnormal thymic follicles. Testes from pet/pet rats exhibited 2 patterns of abnormal histology. Spermatogenesis was present in testes that were only slightly anomalous, but the seminiferous tubules were reduced in diameter. In severely affected testes, most of the seminiferous tubules showed degeneration, and interstitial tissue was increased. Plasma growth hormone concentrations did not differ between pet/pet and normal male rats. The dwarf phenotype of pet/pet rats was inherited as an autosomal recessive trait. These results indicate that the pet/pet rat has a semilethal growth-hormone-independent dwarf phenotype that is accompanied by thymic and testicular anomalies and low birth weight.

Value of PET and PET-CT for monitoring tumor therapy

International Nuclear Information System (INIS)

Chen Xiang; Zhao Jinhua

2007-01-01

18 F-fluorodeoxyglucose ( 18 F-FDG) PET or PET-CT is an accurate test for differentiating residual viable tumor tissue from therapy-induced changes in tumor. Furthermore, quantitative assessment of therapy-induced changes in tumor 18 F-FDG uptake may allow the prediction of tumor response. Treatment may be adjusted according to tumor response. So it is increasingly used to monitor tumor response in patients undergoing chemotherapy and chemoradiotherapy. Here we focused on practical aspects of 18 F-FDG PET or PET-CT for treatment monitoring and on the existing advantages and challenges. (authors)

CONSUMO DE ALCOHOL EN JOVENES Y SU RELACION CON LA VIOLENCIA PSICOLOGICA EN EL NOVIAZGO

OpenAIRE

Francisco Rafael Guzmán Facundo; Santiaga Enriqueta Esparza Almanza; Selene Alejandra Alcántara Rodríguez; Ivonne Yazmín Escobedo Robles; Tannia Henggeler Hernández

2009-01-01

Un problema relacionado con el abuso de alcohol en jóvenes es la violencia. Los objetivos del estudio fueron: describir la prevalencia del consumo de alcohol, así como la clasificación del consumo en jóvenes, conocer la proporción de mujeres que han sufrido violencia psicológica, la proporción de hombres que han ejercido violencia psicológica y conocer la relación del consumo de alcohol y la violencia psicológica durante el noviazgo en jóvenes de Monterrey, NL, México. Se empleó un diseño de...

El consumo de drogas en el alumnado de la Universidad de Jaén

Directory of Open Access Journals (Sweden)

Mª del Mar Díaz-Castela

Full Text Available Resumen En los últimos años, el consumo de sustancias psicoactivas entre los jóvenes ha incrementado ostensiblemente (OMS, 2011. Por ello, el objetivo de este trabajo es conocer el estado actual del consumo de drogas entre los grupos de consumidores de alto y bajo riesgo en alcohol y tabaco. Para ello se realizó un estudio descriptivo basado en una encuesta, con una muestra de 303 estudiantes de la Universidad de Jaén. Los resultados indican un aumento del consumo de las sustancias psicoactivas en este año y que el alcohol y el tabaco se relacionan con la ingesta de otras sustancias psicoactivas en población universitaria. De lo anterior se deduce la necesidad de seguir trabajando en la concienciación de esta población sobre el peligro de la droga y establecer mejoras en las acciones preventivas en el contexto universitario que se han llevado a cabo hasta ahora, para así disminuir en lo posible el consumo.

Factores psicosociales relacionados con el consumo de alcohol y tabaco en adolescentes españoles

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Cándido J. Inglés

2007-01-01

Full Text Available El objetivo de este estudio ex post facto fue analizar la relación entre variables de personalidad, ansiedad social, conducta prosocial, conducta antisocial y consumo de tabaco y alcohol en la adolescencia. La muestra se compuso de 352 estudiantes de 2º a 4º de Enseñanza Secundaria Obligatoria. Los coeficientes de correlación de Pearson mostraron que el consumo de tabaco correlacionó positiva y significativamente con las puntuaciones en conducta antisocial, extraversión y neuroticismo, mientras que el consumo de alcohol correlacionó positiva y significativamente con las puntuaciones de psicoticismo, extraversión y conducta antisocial. El análisis de regresión logística reveló que los predictores del consumo de tabaco fueron las puntuaciones en conducta antisocial (OR = 1,03; IC 95% = 1,01¿1,05, extraversión (OR = 1,11; IC 95% = 1,02¿ 1,21 y neuroticismo (OR = 1,07; IC 95% = 1,01¿1,13, mientras que los predictores del consumo de alcohol fueron las puntuaciones en conducta antisocial (OR = 1,04; IC 95% = 1,02¿1,07 y extraversión (OR = 1,12; IC 95% = 1,03¿1,24.

Relación entre conducta prosocial, resolución de problemas y consumo de drogas en adolescentes

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Olga Hernández-Serrano

Full Text Available Este estudio presenta como objetivos: 1 estudiar el consumo de drogas, la conducta prosocial y la resolución de problemas en función del sexo y la edad, y 2 analizar la asociación de la conducta prosocial y las habilidades de resolución de problemas con el consumo de drogas. Se realizó un estudio descriptivo con un diseño transversal. La muestra se compuso de 567 escolares de Educación Secundaria Obligatoria (48.14% chicos con edades entre 14 y 17 años (M = 14.92; DT = .90. Se hallaron diferencias estadísticamente significativas en el consumo de alcohol y conducta prosocial en función del sexo, así como en el consumo de alcohol y cannabis en función de la edad. Cuando se controló el efecto de la edad y el sexo dentro de los modelos de regresión, la variable que mejor predijo el consumo de alcohol y cannabis fue la conducta prosocial. Los resultados de este estudio resaltan la importancia de promover conductas prosociales como factor de protección del consumo de alcohol y cannabis en la etapa adolescente.

O Homem Pós-Moderno como Vítima Colateral da Sociedade de Consumo

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Rafaela Baldissera

2017-06-01

Full Text Available O presente artigo tem como objetivo investigar se os padrões determinados pela sociedade de consumidores trazem impactos negativos ao ser humano enquanto ator social. Nesse sentido, por meio do método dedutivo e da técnica bibliográfica, discorre-se sobre o fato de o consumo ser um novo valor social e analisa-se quem seriam as vítimas colaterais da atual sociedade de consumo. Assim, ao verificar que as ações humanas estão sendo orientadas por mandamentos consumistas, reconhece-se a importância de uma educação para o consumo consciente e sustentável como pressuposto para aperfeiçoar um desenvolvimento humano mais responsável, pautado na igualdade e justiça social.

Processing and characterization of extruded PET and its r-PET and ...

Indian Academy of Sciences (India)

of r-PET and r-PET+ MWCNT fillers was obtained by the precipitation method using TFA as a solvent and acetone ... crystallinity in r-PET and decrease in chain entanglements. ..... insufficient to supply the complete information of the surface.

Consumo de bebidas e refrigerantes por adolescentes de uma escola pública Consumo de bebidas y refrescos en adolescentes de una escuela pública Beverage and soft drink consumption by adolescents from a public school

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Camilla Chermont P. Estima

2011-03-01

Full Text Available OBJETIVO: Avaliar o consumo de bebidas e refrigerantes por adolescentes de uma escola pública de São Paulo (SP. MÉTODOS: Participaram do estudo 71 adolescentes com idade entre 14 e 17 anos, de ambos os gêneros, matriculados no ensino médio em uma escola técnica da região metropolitana de São Paulo. Avaliaram se o tipo de bebida consumida durante as refeições, os locais onde se consome refrigerante e o motivo que leva ao consumo. RESULTADOS: A bebida mais consumida durante as refeições foi o suco de frutas industrializado (38,1%, seguido do refrigerante do tipo comum (28,6% e do suco de frutas natural (22,2%. Os locais do consumo de refrigerantes foram a casa (38,2%, seguida da escola (22,1%. O principal fator apontado para o consumo de refrigerantes foi o sabor (75,4%. CONCLUSÕES: O consumo de bebidas açucaradas foi frequente entre adolescentes, especialmente o refrigerante. Essas bebidas são disponíveis e consumidas tanto em casa como na escola e consideradas saborosas. Os programas de educação nutricional devem pensar em como priorizar o consumo de outras bebidas, além de controlar a comercialização de refrigerantes nas escolas, com o objetivo de estimular o consumo de bebidas mais saudáveis para essa faixa etária.OBJETIVO: Evaluar el consumo de bebidas y refrescos por adolescentes de una escuela pública de São Paulo. MÉTODOS: Participaron del estudio 71 adolescentes con edad entre 14 y 17 años, de ambos géneros, matriculados en la secundaria en una escuela técnica de la región metropolitana de la ciudad de São Paulo. Se evaluó el tipo de bebida consumida durante las comidas, los locales donde se consumen refrescos y el motivo que lo lleva al consumo. RESULTADOS: La bebida más consumida durante las comidas fue el jugo de frutas industrializado (38,1%, seguido por el refresco de tipo común (28,6% y por el jugo de frutas natural (22,2%. Los locales del consumo de refrescos fueron la casa (38,2%, seguido por la

PET and PET/CT in tumour of undetermined origin

International Nuclear Information System (INIS)

Garcia O, J.R.

2007-01-01

In this presentation the following conclusions were obtained regarding the use of PET and PET/CT in patient with cancer of unknown primary: 1. Detection of the primary one in 1/3 at 1/2 of patient. 2. It detects metastases in other places in 50%. 3. It changes the initial therapy planned in 1/3 at 1/2 of patient. 4. Useful in initial phases of protocol study to limit the other procedures. After standard evaluation. Before advanced protocol. 5. PET/CT study increases the % of primary detection, although in a non significant way vs. PET. 6. They are required more studies to value their utility to a more objective manner. (Author)

Clinical applications of PET/CT

International Nuclear Information System (INIS)

Le Ngoc Ha

2011-01-01

The purpose of this article is to review the evolution of PET, PET/CT focusing on the technical aspects, PET radiopharmaceutical developments and current clinical applications as well. The newest technologic advances have been reviewed, including improved crystal design, acquisition modes, reconstruction algorithms, etc. These advancements will continue to improve contrast, decrease noise, and increase resolution. Combined PET/CT system provides faster attenuation correction and useful anatomic correlation to PET functional information. A number of new radiopharmaceuticals used for PET imaging have been developed, however, FDG have been considered as the principal PET radiotracer. The current clinical applications of PET and PET/CT are widespread and include oncology, cardiology and neurology. (author)

EHLE Project: Consumo farmacéutico

OpenAIRE

Universidad Permanente de la Universidad de Alicante

2012-01-01

Vídeo Consumo Farmacéutico para utilizar en el Paquete de Formación elaborado a través del Proyecto EHLE (Empowering Health Learning for the Elderly), que fue desarrollado entre 2008 y 2009 en cuatro países europeos - Italia, España, Francia y Holanda - en el marco del Programa Grundtvig de Aprendizaje a lo largo de la Vida de la Comisión Europea.

Consumo alimentar e fatores dieteticos envolvidos no processo saude e doenca de Nikkeis: revisao sistematica

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Fabiana Hitomi Tanabe

2013-06-01

Full Text Available OBJETIVO: Analisar consumo alimentar e fatores dietéticos envolvidos no processo saúde e doença da população de nikkeis. MÉTODOS: Foi realizada revisão sistemática da literatura, com buscas nas bases de dados do Lilacs, SciELO e PubMed/Medline, referente ao período de 1997 a 2012, de estudos observacionais sobre o consumo alimentar de nikkeis. Inicialmente, foram analisados 137 títulos e resumos, sendo excluídos estudos de intervenção, aqueles que apresentavam somente níveis séricos de vitaminas e metabólitos e estudos que não contemplassem o objetivo da revisão. Desses, foram selecionados 38 estudos avaliados com base no método de Downs & Black (1998, adaptado para estudos observacionais, permanecendo 33 para análise. RESULTADOS: Foram encontrados poucos estudos sobre consumo alimentar de nikkeis fora do Havaí, dos Estados Unidos e do estado de São Paulo (principalmente em Bauru, no Brasil. Houve elevada contribuição dos lipídios no valor calórico total dos nipo-brasileiros, em detrimento dos carboidratos e das proteínas. Nos Estados Unidos, a prevalência de consumo de alimentos de alta densidade energética foi elevada em nipo-americanos. Os nisseis (filhos de imigrantes apresentaram, em média, maior consumo de produtos da dieta japonesa, enquanto os sanseis (netos de imigrantes apresentaram um perfil alimentar mais ocidentalizado. CONCLUSÕES: O consumo alimentar de nikkeis, embora ainda conservando alguns hábitos alimentares de japoneses nativos, revela alta prevalência de consumo de alimentos típicos do padrão ocidental (alimentos processados, ricos em gorduras e sódio e pobres em fibras, que pode estar contribuindo para o aumento de doenças crônicas nessa população.

Perfis de consumo alcoolico entre pacientes da atencao primaria a saude e seu reconhecimento pelos profissionais de saude

Directory of Open Access Journals (Sweden)

Maira Lemos de Castro Taufick

2014-02-01

Full Text Available Neste estudo transversal verificaram-se os perfis de consumo alcoólico entre pacientes das Equipes de Saúde da Família (ESF em uma cidade do sudeste brasileiro, e o reconhecimento deste consumo pelos profissionais das ESF. Avaliaram-se 932 pacientes adultos entre novembro de 2010 e novembro de 2011. Entre todos, 17,5% faziam consumo de risco (AUDIT ≥ 8, que foi mais frequente em homens, entre as pessoas mais jovens e aqueles sem doenças crônicas. O questionário CAGE foi positivo em 98 (10,5% pacientes, sendo mais frequente em homens. Homens, pessoas com idades ≥ 55 anos, com doenças crônicas ou com consumo alcoólico mais grave foram mais frequentemente questionadas sobre o uso do álcool (438/932; 47,8%. Homens, pessoas de 35 a 54 anos ou com consumo alcoólico mais grave foram mais frequentemente reconhecidos como alcoolistas (22/175; 12,6%. Conclui-se que o consumo do álcool é frequente entre os pacientes atendidos pelas ESF, é pouco reconhecido pelos profissionais e a minoria dos alcoolistas é orientada quanto aos seus riscos.

Consumo de álcool entre pescadores: uma revisão integrativa Alcohol consumption among fishermen: an integrative review

Directory of Open Access Journals (Sweden)

Crystiane Ribas Batista Ribeiro

2017-04-01

Full Text Available Objetivo: Sintetizar a produção científica quanto ao consumo de álcool entre pescadores. Método: Revisão integrativa realizada por meio de levantamento bibliográfico nas bases de dados CAPES, ScieLO e LILACS, com período de coleta de dados entre março a abril de 2014. Resultados: Evidenciou-se o consumo de álcool como atividade habitual entre pescadores, salientando sua associação com religião, longas jornadas de trabalho, desconhecimento dos níveis máximos de consumo de álcool semanais satisfatórios, acidentes ocupacionais, doenças sexualmente transmissíveis e cardiovasculares, e hiperlipidemia. Conclusão:O consumo de álcool é uma prática comum entre os pescadores e apesar de todos os estudos apontarem para essa prática, não há evidências de alternativas reais relacionadas à promoção, prevenção e cuidado da saúde de pescadores no que tange ao consumo de álcool.  Descritores: Consumo de bebidas alcoólicas, Pesqueiros, Saúde do trabalhador, Enfermagem.

Consumo de bebida alcoólica e adiposidade abdominal em doadores de sangue Consumo de bebida alcohólica y adiposidad abdominal en donadores de sangre Alcohol consumption and abdominal fat in blood donors

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Márcia Gonçalves Ferreira

2008-12-01

Full Text Available OBJETIVO: Analisar a associação entre o consumo de bebidas alcoólicas e adiposidade abdominal. MÉTODOS: Estudo transversal com uma amostra de homens doadores de sangue (N=1.235, de 20 a 59 anos, em Cuiabá (MT, realizado de agosto/1999 a janeiro/2000. Os indicadores de adiposidade abdominal foram circunferência da cintura e relação cintura/quadril, ajustados pela adiposidade total. As medidas aferidas foram: peso, estatura, circunferências da cintura e do quadril. O consumo de álcool foi avaliado utilizando-se um questionário sobre tipo, freqüência e quantidade da bebida consumida. A associação entre o consumo de álcool e adiposidade abdominal foi analisada por regressão linear múltipla, com os modelos ajustados para idade, atividade física, tabagismo e adiposidade total. RESULTADOS: Após ajuste, a circunferência da cintura e a relação cintura quadril mantiveram-se associadas positivamente ao consumo de cerveja (p=0,02 e ao total de álcool consumido (p=0,01 e 0,03, respectivamente. O consumo de aguardente mostrou associação somente com a circunferência da cintura (p=0,04. CONCLUSÕES: O consumo de álcool, particularmente de cerveja, associou-se com a localização abdominal de gordura.OBJETIVO: Analizar la asociación entre el consumo de bebidas alcohólica y adiposidad abdominal. MÉTODOS: Se efectuó estudio transversal con una muestra de hombres donadores de sangre (N= 1.235, de 20 a 59 años, en Cuiabá (Centro-Oeste de Brasil, realizado de agosto/1999 a enero/2000. Los indicadores de adiposidad abdominal fueron circunferencia de la cintura y relación cintura/cuadril, ajustadas por la adiposidad total. Las medidas verificables fueron: peso, estatura, circunferencias de la cintura y del cuadril. El consumo de alcohol fue evaluado utilizándose un cuestionario sobre tipo, frecuencia y cantidad de la bebida consumida. La asociación entre el consumo de alcohol y adiposidad abdominal fue analizada por regresi

F actors Affecting Non Bank - Issued POS E - microp a ym en t Choice: A Study of Taiwan Market

OpenAIRE

Wee Kheng Tan; Shih Kuo Chen

2008-01-01

I n Taiwan , o rgani z ations with existing captive markets, that is, transport - related companies and convenience stores, have issue d their own non bank - issued POS e - micro payment programs and achieve d good success. Due to legal restriction imposed on non bank - issued programs, Taiwan’s market has evolve d further resulting in two major categories: non bank - iss...

Diagnosis and dosimetry in differentiated thyroid carcinoma using 124I PET: comparison of PET/MRI vs PET/CT of the neck

International Nuclear Information System (INIS)

Nagarajah, James; Jentzen, Walter; Hartung, Verena; Rosenbaum-Krumme, Sandra; Bockisch, Andreas; Stahl, Alexander; Mikat, Christian; Heusner, Till Alexander; Antoch, Gerald

2011-01-01

This study compares intrinsically coregistered 124 I positron emission tomography (PET) and CT (PET/CT) and software coregistered 124 I PET and MRI (PET/MRI) images for the diagnosis and dosimetry of thyroid remnant tissues and lymph node metastases in patients with differentiated thyroid carcinoma (DTC). After thyroidectomy, 33 high-risk DTC patients (stage III or higher) received 124 I PET/CT dosimetry prior to radioiodine therapy to estimate the absorbed dose to lesions and subsequently underwent a contrast-enhanced MRI examination of the neck. Images were evaluated by two experienced nuclear medicine physicians and two radiologists to identify the lesions and to categorize their presumable provenience, i.e. thyroid remnant tissue (TT), lymph node metastasis (LN) and inconclusive tissue. The categorization and dosimetry of lesions was initially performed with PET images alone (PET only). Subsequently lesions were reassessed including the CT and MRI data. The analyses were performed on a patient and on a lesion basis. Patient-based analyses showed that 26 of 33 (79%) patients had at least one lesion categorized as TT on PET only. Of these patients, 11 (42%) and 16 (62%) had a morphological correlate on CT and MRI, respectively, in at least one TT PET lesion. Twelve patients (36%) had at least one lesion classified as LN on PET only. Nine (75%) of these patients had a morphological correlate on both CT and MRI in at least one LN PET lesion. Ten patients (30%) showed at least one lesion on PET only classified as inconclusive. The classification was changed to a clear classification in two patients (two LN) by CT and in four (two TT, two LN) patients by MRI. Lesion-based analyses (n = 105 PET positive lesions) resulted in categorization as TT in 61 cases (58%), 16 (26%) of which had a morphological correlate on CT and 33 (54%) on MRI. A total of 29 lesions (27%) were classified as LN on PET, 18 (62%) of which had a morphological correlate on CT and 24 (83%) on MRI

Importancia de la educación en las farmacias comunitarias respecto al consumo responsable de alcohol

Directory of Open Access Journals (Sweden)

Gallego Muñoz C

2017-12-01

Full Text Available El consumo de alcohol es uno de los factores de riesgo prevenible más ampliamente reconocido que se asocia con un aumento de la morbi y mortalidad en la población. En los países mediterráneos se bebe alcohol desde tiempos remotos, obteniéndose a partir de la fermentación de frutos, y más rara vez mediante destilación. En España, en general se sigue el llamado “patrón de consumo mediterráneo” caracterizado por un consumo ligado a las relaciones sociales en compañía de amigos, familiares o conocidos y que se produce actualmente de forma mayoritaria a través del canal de hostelería y menos en el hogar. Se asume que se trata de un consumo responsable moderado, no concentrado en los fines de semana y no asociado a ingesta de grandes cantidades de alcohol en periodos limitados de tiempo. Por otro lado, existe evidencia acerca de la relación beneficiosa que existe entre un consumo moderado de alcohol y la salud.

Clinical Application of F-18 FDG PET (PET/CT) in Colo-rectal and Anal Cancer

International Nuclear Information System (INIS)

Kim, Byung Il

2008-01-01

In the management of colo-retal and anal cancer, accurate staging, treatment evaluation, early detection of recurrence are main clinical problems. F-18 FDG PET (PET/CT) has been reported as useful in the management of colo-rectal and anal cancer because that PET has high diagnostic performance comparing to conventional studies. In case of liver metastases, for confirmation of no extrahepatic metastases, in case of high risk of metastasis, for avoiding unnecessary operation, PET (PET/CT) is expected more useful. In anal cancer, PET is expected useful in lymph node staging. For the early prediction of chemotherapy or radiation therapy effect PET has been reported as useful, also. In early detection of recurrence by PET, cost-benefit advantages has been suggested, also. PET/CT is expected to have higher diagnostic performance than PET alone

Clinical Application of F-18 FDG PET (PET/CT) in Malignancy of Unknown Origin

International Nuclear Information System (INIS)

Kim, Byung Il

2008-01-01

Diagnosis of primary origin site in the management of malignancy of unknown origin (MUO) is the most important issue. According to the histopathologic subtype of primary lesion, specialized treatment can be given and survival gain is expected. F-18 FDG PET (PET/CT) has been estimated as useful in detection of primary lesion with high sensitivity and moderate specificity. F-18 FDG PET (PET/CT) study before conventional studies is also recommended because it has high diagnostic performance compared to conventional studies. Although there has few data, F-18 FDG PET (PET/CT) is expected to be useful in diagnosis of recurrence, restaging, evaluation of treatment effect, considering that PET (PET/CT) has been reported as useful in other malignancies

Basic study of entire whole-body PET scanners based on the OpenPET geometry

Energy Technology Data Exchange (ETDEWEB)

Yoshida, Eiji, E-mail: rush@nirs.go.j [National Institute of Radiological Sciences, 4-9-1 Inage-ku, Chiba 263-8555 (Japan); Yamaya, Taiga; Nishikido, Fumihiko; Inadama, Naoko; Murayama, Hideo [National Institute of Radiological Sciences, 4-9-1 Inage-ku, Chiba 263-8555 (Japan)

2010-09-21

A conventional PET scanner has a 15-25 cm axial field-of-view (FOV) and images a whole body using about six bed positions. An OpenPET geometry can extend the axial FOV with a limited number of detectors. The entire whole-body PET scanner must be able to process a large amount of data effectively. In this work, we study feasibility of the fully 3D entire whole-body PET scanner using the GATE simulation. The OpenPET has 12 block detector rings with the ring diameter of 840 mm and each block detector ring consists of 48 depth-of-interaction (DOI) detectors. The OpenPET has the axial length of 895.95 mm with five parts of 58.95 mm open gaps. The OpenPET has higher single data loss than a conventional PET scanner at grouping circuits. NECR of the OpenPET decreases by single data loss. But single data loss is mitigated by separating the axially arranged detector into two parts. Also, multiple coincidences are found to be important for the entire whole-body PET scanner. The entire whole-body PET scanner with the OpenPET geometry promises to provide a large axial FOV with the open space and to have sufficient performance values. But single data loss at the grouping circuits and multiple coincidences are limited to the peak noise equivalent count rate (NECR) for the entire whole-body PET scanner.

Condiciones del consumo e ingreso por el trabajo en Piedras Negras, Coahuila

Directory of Open Access Journals (Sweden)

Blanca Delia Vázquez Delgado

2002-01-01

Full Text Available En este trabajo se asume que los patrones de consumo son resultado, principalmente, de la estructura socioeconómica y por ello identifican ciertas condiciones del bienestar alcanzado por la población. La existencia de mercados de consumo transfronterizos, bajo condiciones de diferenciación e integración, permiten a la población asentada a lo largo de la frontera entre México y Estados Unidos discriminar entre bienes y servicios que le proporcionan diferentes escalas de calidad y satisfacción de necesidades. Esta circunstancia, sin embargo, evidencia con mayor magnitud las diferencias en los estándares de bienestar en poblaciones de carácter no sólo heterogéneo y de desigual distribución del ingreso, sino también un desigual acceso a mercados de consumo, colocando, en los espacios transfronterizos, a los usos y valores sociales del acto de compra por encima de las desigualdades propias de la distribución del ingreso.

Trends in PET imaging

International Nuclear Information System (INIS)

Moses, William W.

2000-01-01

Positron Emission Tomography (PET) imaging is a well established method for obtaining information on the status of certain organs within the human body or in animals. This paper presents an overview of recent trends PET instrumentation. Significant effort is being expended to develop new PET detector modules, especially those capable of measuring depth of interaction. This is aided by recent advances in scintillator and pixellated photodetector technology. The other significant area of effort is development of special purpose PET cameras (such as for imaging breast cancer or small animals) or cameras that have the ability to image in more than one modality (such as PET / SPECT or PET / X-Ray CT)

Consumo ilimitado, eficiencia y desigualdad urbana. Definición socioecológica del consumo urbano desde las perspectivas del marxismo y el metabolismo

Directory of Open Access Journals (Sweden)

Rubén Miguel Águeda

2015-12-01

Full Text Available Resumen Las mejoras en la eficiencia de los sistemas urbanos pueden resultar insuficientes en la búsqueda de una ciudad más respetuosa con el medio natural si el consumo en el interior de las ciudades sigue creciendo sin control y, especialmente, si este incremento no es consecuencia directa del comportamiento de los consumidores. Para explicar cómo la estructura de la ciudad interviene en el consumo se recurre a dos formas diferentes de entender el espacio urbano. Por un lado el estudio del metabolismo urbano cuantifica los componentes que intervienen en el consumo, por otro, las interpretaciones marxistas de la ciudad tratan de explicar las estructuras sociales, políticas y económicas que lo condicionan. El resultado es una teoría conjunta que permite interpretar todos los fenómenos y actividades que engloba el término consumo, aglutinando tanto la dimensión ecológica de éste como los aspectos sociales y políticos que intervienen en el mismo. Palabras clave Estructura urbana, sostenibilidad, flujos de circulación, escasez, desequilibrios sociales y ambientales Abstract Improving the efficiency of urban systems may prove insufficient in the pursuit of a friendlier city with the environment if consumption within cities continues growing out of control and, in particular, if this increase is not a direct consequence of consumers’ behavior. For explaining how the structure of the city intervenes in consumption we can use two different ways of understanding urban space. On one hand urban metabolism quantifies the components involved in consumption, on the other Marxist interpretations of the city try to explain the social, political and economic structures that condition it. The result is a joint theory that allow us to interpret every phenomenon and activity within the term consumption and that bring together both ecological, political and social dimensions involved. Keywords Urban structure, sustainability, circulation fluxes

Patrón de consumo e ingestas recomendadas de azúcar

OpenAIRE

Joan Quiles i Izquierdo

2013-01-01

Los azúcares son hidratos de carbono con sabor dulce que proveen energía al organismo. El cerebro adulto utiliza aproximadamente 140 g de glucosa al día, cantidad que puede representar hasta el 50% del total de hidratos de carbono que se consumen. En nuestro país el patrón de consumo de azúcar en alimentos permanece constante, mientras que el consumo de bebidas refrescantes presenta un aumento en los últimos cuatro años. La Encuesta Nacional de Ingesta Dietética de España (ENIDE, 2010-11) est...

Imaging with {sup 124}I in differentiated thyroid carcinoma: is PET/MRI superior to PET/CT?

Energy Technology Data Exchange (ETDEWEB)

Binse, I.; Poeppel, T.D.; Ruhlmann, M.; Gomez, B.; Bockisch, A.; Rosenbaum-Krumme, S.J. [University of Duisburg-Essen, Medical Faculty, Department of Nuclear Medicine, Essen (Germany); Umutlu, L. [University of Duisburg-Essen, Medical Faculty, Department of Radiology, Essen (Germany)

2016-06-15

The aim of this study was to compare integrated PET/CT and PET/MRI for their usefulness in detecting and categorizing cervical iodine-positive lesions in patients with differentiated thyroid cancer using {sup 124}I as tracer. The study group comprised 65 patients at high risk of iodine-positive metastasis who underwent PET/CT (low-dose CT scan, PET acquisition time 2 min; PET/CT{sub 2}) followed by PET/MRI of the neck 24 h after {sup 124}I administration. PET images from both modalities were analysed for the numbers of tracer-positive lesions. Two different acquisition times were used for the comparisons, one matching the PET/CT{sub 2} acquisition time (2 min, PET/MRI{sub 2}) and the other covering the whole MRI scan time (30 min, PET/MRI{sub 30}). Iodine-positive lesions were categorized as metastasis, thyroid remnant or inconclusive according to their location on the PET/CT images. Morphological information provided by MRI was considered for evaluation of lesions on PET/MRI and for volume information. PET/MRI{sub 2} detected significantly more iodine-positive metastases and thyroid remnants than PET/CT{sub 2} (72 vs. 60, p = 0.002, and 100 vs. 80, p = 0.001, respectively), but the numbers of patients with at least one tumour lesion identified were not significantly different (21/65 vs. 17/65 patients). PET/MRI{sub 30} tended to detect more PET-positive metastases than PET/MRI{sub 2} (88 vs. 72), but the difference was not significant (p = 0.07). Of 21 lesions classified as inconclusive on PET/CT, 5 were assigned to metastasis or thyroid remnant when evaluated by PET/MRI. Volume information was available in 34 % of iodine-positive metastases and 2 % of thyroid remnants on PET/MRI. PET/MRI of the neck was found to be superior to PET/CT in detecting iodine-positive lesions. This was attributed to the higher sensitivity of the PET component, Although helpful in some cases, we found no substantial advantage of PET/MRI over PET/CT in categorizing iodine

Imaging corn plants with PhytoPET, a modular PET system for plant biology

Energy Technology Data Exchange (ETDEWEB)

Lee, S.; Kross, B.; McKisson, J.; McKisson, J. E.; Weisenberger, A. G.; Xi, W.; Zorn, C.; Bonito, G.; Howell, C. R.; Reid, C. D.; Crowell, A.; Cumberbatch, L. C.; Topp, C.; Smith, M. F.

2013-11-01

PhytoPET is a modular positron emission tomography (PET) system designed specifically for plant imaging. The PhytoPET design allows flexible arrangements of PET detectors based on individual standalone detector modules built from single Hamamatsu H8500 position sensitive photomultiplier tubes and pixelated LYSO arrays. We have used the PhytoPET system to perform preliminary corn plant imaging studies at the Duke University Biology Department Phytotron. Initial evaluation of the PhytoPET system to image the biodistribution of the positron emitting tracer {sup 11}C in corn plants is presented. {sup 11}CO{sub 2} is loaded into corn seedlings by a leaf-labeling cuvette and translocation of {sup 11}C-sugars is imaged by a flexible arrangement of PhytoPET modules on each side. The PhytoPET system successfully images {sup 11}C within corn plants and allows for the dynamic measurement of {sup 11}C-sugar translocation from the leaf to the roots.

Oncology PET imaging

International Nuclear Information System (INIS)

Inubushi, Masayuki

2014-01-01

At the beginning of this article, likening medical images to 'Where is Waldo?' I indicate the concept of diagnostic process of PET/CT imaging, so that medical physics specialists could understand the role of each imaging modality and infer our distress for image diagnosis. Then, I state the present situation of PET imaging and the basics (e.g. health insurance coverage, clinical significance, principle, protocol, and pitfall) of oncology FDG-PET imaging which accounts for more than 99% of all clinical PET examinations in Japan. Finally, I would like to give a wishful prospect of oncology PET that will expand to be more cancer-specific in order to assess therapeutic effects of emerging molecular targeted drugs targeting the 'hallmarks of cancer'. (author)

[18F]FDG PET/CT outperforms [18F]FDG PET/MRI in differentiated thyroid cancer

International Nuclear Information System (INIS)

Vrachimis, Alexis; Wenning, Christian; Weckesser, Matthias; Stegger, Lars; Burg, Matthias Christian; Allkemper, Thomas; Schaefers, Michael

2016-01-01

To evaluate the diagnostic potential of PET/MRI with [ 18 F]FDG in comparison to PET/CT in patients with differentiated thyroid cancer suspected or known to have dedifferentiated. The study included 31 thyroidectomized and remnant-ablated patients who underwent a scheduled [ 18 F]FDG PET/CT scan and were then enrolled for a PET/MRI scan of the neck and thorax. The datasets (PET/CT, PET/MRI) were rated regarding lesion count, conspicuity, diameter and characterization. Standardized uptake values were determined for all [ 18 F]FDG-positive lesions. Histology, cytology, and examinations before and after treatment served as the standards of reference. Of 26 patients with a dedifferentiated tumour burden, 25 were correctly identified by both [ 18 F]FDG PET/CT and PET/MRI. Detection rates by PET/CT and PET/MRI were 97 % (113 of 116 lesions) and 85 % (99 of 113 lesions) for malignant lesions, and 100 % (48 of 48 lesions) and 77 % (37 of 48 lesions) for benign lesions, respectively. Lesion conspicuity was higher on PET/CT for both malignant and benign pulmonary lesions and in the overall rating for malignant lesions (p < 0.001). There was a difference between PET/CT and PET/MRI in overall evaluation of malignant lesions (p < 0.01) and detection of pulmonary metastases (p < 0.001). Surgical evaluation revealed three malignant lesions missed by both modalities. PET/MRI additionally failed to detect 14 pulmonary metastases and 11 benign lesions. In patients with thyroid cancer and suspected or known dedifferentiation, [ 18 F]FDG PET/MRI was inferior to low-dose [ 18 F]FDG PET/CT for the assessment of pulmonary status. However, for the assessment of cervical status, [ 18 F]FDG PET/MRI was equal to contrast-enhanced neck [ 18 F]FDG PET/CT. Therefore, [ 18 F]FDG PET/MRI combined with a low-dose CT scan of the thorax may provide an imaging solution when high-quality imaging is needed and high-energy CT is undesirable or the use of a contrast agent is contraindicated. (orig.)

CyberPET: a PET service distributed over a wide area

International Nuclear Information System (INIS)

Pilloy, W.J.; Hellwig, D.; Schaeffer, A.; Hoffmann, P.; Lens, V.

2002-01-01

Aim: Demonstration of bi-directional PET data transmission, interactive display and co-registration, for the purpose of correlative imaging, treatment planning and teaching. Material and Method: In the year 2000, the initial problem to attend was to provide an effective PET service to a hospital (in Luxemburg) which lies 150 km away from a PET center (in another country). Once this solved, the procedure was expanded (in 2001) to co-registration with CT/MRI scans performed locally, and with radiotherapy simulation CT performed in another center 25 km away (in 2002). Equipment from various vendors was used (Siemens, Adac, GE, Hermes). With preliminary agreement of the national medical aid, patients are sent from the Nuclear Medicine Dept of the Centre Hospitalier in Luxemburg (CHL) to the Dept NM of the Saarland University Medical Center for PET examination. The digital data are then sent from the Siemens PET camera to a PC connected to the LAN, and then to a FTP server (Healthnet). The data are similarly collected by a PC of the hospital network in Luxemburg, and transferred to a Hermes NM station. The Dicom PET data are converted on the fly to Interfile, displayed interactively as any other tomographic data, printed and available on the NM image server. Since 2001, the PET data are co-registered with whole-body CT data recorded at CHL according to a specific protocol (see other paper of this group). Now in 2002, we are busy implementing the co-registration of PET data and simulation CT data obtained from the Centre Baclesse (CFB, 25 km from CHL) for the treatment planning of brain tumours (input into an ADAC system). Furthermore, we plan to send the data (after deletion of their digital ID) to a (South African) university which does not yet dispose of a PET camera, to allow the training of their registrars. Results: For the end-user clinician at CHL and CFB , the PET data have the quality of 'live data', which can be examined interactively, along with other imaging

Manejo do etileno e sua relação com a maturação de maçãs 'Gala' armazenadas em atmosfera controlada Ethylene management and its relationship with ripening of 'Gala' apples stored on controlled atmosphere

Directory of Open Access Journals (Sweden)

Auri Brackmann

2009-01-01

Full Text Available O objetivo deste trabalho foi avaliar a qualidade da maçã 'Gala' submetida a diferentes formas de manejo do etileno, por meio da inibição da síntese, inibição da ação e ainda pela sua absorção na câmara de armazenamento, associado a duas temperaturas. Os tratamentos utilizados originaram-se da combinação de duas temperaturas (0,5 °C e -0,5 °C e da aplicação de aminoetoxivinilglicina (AVG e de 1-metilciclopropeno (1-MCP além da absorção do etileno, sendo todos os tratamentos armazenados em atmosfera controlada (AC com 1,2 kPa O2 e 2,5 kPa CO2. As avaliações da maturação e qualidade dos frutos foram realizadas após oito meses de armazenamento e após este tempo mais sete dias de exposição a 20 °C. A aplicação de AVG manteve a epiderme dos frutos mais verde na saída da câmara. Após sete dias a 20 °C, o tratamento com AVG proporcionou frutos com cor de fundo mais verde, com menor incidência de podridão, maior firmeza de polpa e menor incidência de degenerescência senescente. A menor produção de etileno dos frutos tratados com AVG propiciou baixa respiração, mantendo mais altos os níveis de acidez. A temperatura de 0,5°C promoveu significativa manutenção da acidez titulável total e menor incidência de degenerescência senescente, quando comparada com a temperatura de -0,5 ºC. A absorção de etileno e a aplicação de 1-MCP foram eficientes no controle da degenerescência senescente e da perda de firmeza, porém foram menos eficientes que o tratamento com AVG.This research aimed to evaluate the quality of Gala apples submitted to different ways of ethylene handling, through inhibition of synthesis, inhibition of action and ethylene absorption in storage room, associated with two temperatures. The treatments originated from the combination between two temperatures (0.5 °C e -0.5 °C and application of aminoethoxyvinylglycine (AVG, 1- methylcyclopropene (1-MCP and ethylene absorption. All treatments

Childhood Attachment to Pets: Associations between Pet Attachment, Attitudes to Animals, Compassion, and Humane Behaviour

Directory of Open Access Journals (Sweden)

Roxanne D. Hawkins

2017-05-01

Full Text Available Attachment to pets has an important role in children’s social, emotional, and cognitive development, mental health, well-being, and quality of life. This study examined associations between childhood attachment to pets and caring and friendship behaviour, compassion, and attitudes towards animals. This study also examined socio-demographic differences, particularly pet ownership and pet type. A self-report survey of over one thousand 7 to 12 year-olds in Scotland, UK, revealed that the majority of children are strongly attached to their pets, but attachment scores differ depending on pet type and child gender. Analysis revealed that attachment to pets is facilitated by compassion and caring and pet-directed friendship behaviours and that attachment to pets significantly predicts positive attitudes towards animals. The findings have implications for the promotion of prosocial and humane behaviour. Encouraging children to participate in pet care behaviour may promote attachment between children and their pet, which in turn may have a range of positive outcomes for both children (such as reduced aggression, better well-being, and quality of life and pets (such as humane treatment. This study enhances our understanding of childhood pet attachment and has implications for humane education and promoting secure emotional attachments in childhood.

Monitorización del consumo eléctrico

OpenAIRE

González Albín, Iosu

2014-01-01

Desarrollo de una aplicación de monitorización del consumo eléctrico con ODEnergy desde Android. Desenvolupament d'una aplicació de monitorització del consum elèctric amb ODEnergy des d'Android. Bachelor thesis for the Telecommunication Technologies program on Telematics.

Patrones de consumo, estado nutricional y suplementos dietarios en el Muay Thai

OpenAIRE

Cañadas, Lucas

2013-01-01

El Muay Thai es un arte marcial tailandés considerado hoy uno de los mejores deportes de contacto en el mundo porque trabaja todas las extremidades del cuerpo, y permite un elevado desarrollo de la aptitud física, de concentración y la confianza. El objetivo del presente trabajo es determinar cuáles son los patrones de consumo alimentario, el estado nutricional y el consumo de suplementos dietarios en deportistas que practican la disciplina de Muay Thai en la ciudad de Mar del ...

Consumo de Drogas en Estudiantes del Nivel Medio Superior de la Universidad de Guanajuato Consumo de Drogas en Estudiantes del Nivel Medio Superior de la Universidad de Guanajuato

Directory of Open Access Journals (Sweden)

Diana Ojeda Revah

2012-02-01

Full Text Available El consumo de drogas es un problema de salud pública a nivel mundial y los estudiantes del nivel medio superior de la Universidad de Guanajuato no están exentos de éste fenómeno. El presente estudio evaluó la prevalencia del consumo de varias drogas, alcohol y tabaco, los factores psicosociales asociados y las diferencias de éstos por sexo. Se aplicó el “Cuestionario de estudiantes 2002” a 2 532 alumnos (rango de edad 13 a 22 años. Entre los resultados se encontró que el 14.2 % de la muestra ha consumido alguna droga ilegal alguna vez en su vida; las drogas más utilizadas son tranquilizantes, marihuana y cocaína. La prevalencia de consumo de drogas presentó índices superiores a los reportados nacionalmente. Fue detectada la influencia de la familia y de las creencias personales como factores protectores o de riesgo del consumo. Además, hubieron diferencias entre hombres y mujeres respecto a las drogas usadas y en las creencias sobre las mismas, entre otras. Ante un porcentaje de consumo tan elevado se vuelve necesario profundizar más en el tema. Drug abuse is a public health world wide problem of, and Guanajuato’s University High School students are not exempt from this phenomenon. This study evaluated the prevalence in usage of several drugs, alcohol and tobacco, the associated psychosocial factors and the differences by sexes. The “Questionnaire for students 2002” was applied to 2 532 high school students (ranging from 13 to 22 yearsold. It was found that 14.2 % of the sample has used illegal drugs; the drugs mostly used were tranquilizers, marijuana and cocaine. In our sample, the drug consume (legal and illegal drugs prevalences howed higher rate than the national reported. Family Influence and personal beliefs were detected as a consume protection factor. Differences by sexes about particular drugs use and the beliefs about them were found. In view of the results deeper studies are necessary.

Selecting Safe Pets (For Parents)

Science.gov (United States)

... supplies (pet bowls, pet bed, leash, etc.) as gifts, then selecting the pet as a family. That way, everyone has time to really think about whether your family is ready for a pet. Key Questions Before adopting or purchasing any pet, talk to all family members, discuss ...

Consumo de bebidas alcoólicas na população adulta Brasileira: características sociodemográficas e tendência

OpenAIRE

Moura,Erly Catarina; Malta,Deborah Carvalho

2011-01-01

OBJETIVO: Estimar o consumo de bebidas alcoólicas, identificar as características sociodemográficas associadas a este consumo em 2006 e avaliar a tendência de consumo de 2006 a 2009. MÉTODOS: Foram avaliados, em 2006, 54.369 adultos residentes nas capitais de estados brasileiros e no Distrito Federal. Considerou-se consumo habitual a ingestão de qualquer quantidade de bebida alcoólica nos últimos 30 dias, e consumo abusivo a ingestão de mais de 5 doses para homens ou mais de 4 doses para mulh...

Diagnostic performance of FDG PET or PET/CT in prosthetic infection after arthroplasty: a meta-analysis

International Nuclear Information System (INIS)

Jin, H.; Yuan, L.; Li, C.; Kan, Y.; Yang, J.; Hao, R.

2014-01-01

The purpose of this study was to systematically review and perform a meta-analysis of published data regarding the diagnostic performance of positron emission tomography (PET) or PET/computed tomography (PET/CT) in prosthetic infection after arthroplasty. A comprehensive computer literature search of studies published through May 31, 2012 regarding PET or PET/CT in patients suspicious of prosthetic infection was performed in PubMed/MEDLINE, Embase and Scopus databases. Pooled sensitivity and specificity of PET or PET/CT in patients suspicious of prosthetic infection on a per prosthesis-based analysis were calculated. The area under the receiver-operating characteristic (ROC) curve was calculated to measure the accuracy of PET or PET/CT in patients with suspicious of prosthetic infection. Fourteen studies comprising 838 prosthesis with suspicious of prosthetic infection after arthroplasty were included in this meta-analysis. The pooled sensitivity of PET or PET/CT in detecting prosthetic infection was 86% (95% confidence interval [CI] 82-90%) on a per prosthesis-based analysis. The pooled specificity of PET or PET/CT in detecting prosthetic infection was 86% (95% CI 83-89%) on a per prosthesis-based analysis. The area under the ROC curve was 0.93 on a per prosthesis-based analysis. In patients suspicious of prosthetic infection, FDG PET or PET/CT demonstrated high sensitivity and specificity. FDG PET or PET/CT are accurate methods in this setting. Nevertheless, possible sources of false positive results and influcing factors should kept in mind.

Diagnostic performance of FDG PET or PET/CT in prosthetic infection after arthroplasty: a meta-analysis.

Science.gov (United States)

Jin, H; Yuan, L; Li, C; Kan, Y; Hao, R; Yang, J

2014-03-01

The purpose of this study was to systematically review and perform a meta-analysis of published data regarding the diagnostic performance of positron emission tomography (PET) or PET/computed tomography (PET/CT) in prosthetic infection after arthroplasty. A comprehensive computer literature search of studies published through May 31, 2012 regarding PET or PET/CT in patients suspicious of prosthetic infection was performed in PubMed/MEDLINE, Embase and Scopus databases. Pooled sensitivity and specificity of PET or PET/CT in patients suspicious of prosthetic infection on a per prosthesis-based analysis were calculated. The area under the receiver-operating characteristic (ROC) curve was calculated to measure the accuracy of PET or PET/CT in patients with suspicious of prosthetic infection. Fourteen studies comprising 838 prosthesis with suspicious of prosthetic infection after arthroplasty were included in this meta-analysis. The pooled sensitivity of PET or PET/CT in detecting prosthetic infection was 86% (95% confidence interval [CI] 82-90%) on a per prosthesis-based analysis. The pooled specificity of PET or PET/CT in detecting prosthetic infection was 86% (95% CI 83-89%) on a per prosthesis-based analysis. The area under the ROC curve was 0.93 on a per prosthesis-based analysis. In patients suspicious of prosthetic infection, FDG PET or PET/CT demonstrated high sensitivity and specificity. FDG PET or PET/CT are accurate methods in this setting. Nevertheless, possible sources of false positive results and influcing factors should kept in mind.

Clinical Applications of FDG PET and PET/CT in Head and Neck Cancer

Directory of Open Access Journals (Sweden)

Akram Al-Ibraheem

2009-01-01

Full Text Available 18F-FDG PET plays an increasing role in diagnosis and management planning of head and neck cancer. Hybrid PET/CT has promoted the field of molecular imaging in head and neck cancer. This modality is particular relevant in the head and neck region, given the complex anatomy and variable physiologic FDG uptake patterns. The vast majority of 18F-FDG PET and PET/CT applications in head and neck cancer related to head and neck squamous cell carcinoma. Clinical applications of 18F-FDG PET and PET/CT in head and neck cancer include diagnosis of distant metastases, identification of synchronous 2nd primaries, detection of carcinoma of unknown primary and detection of residual or recurrent disease. Emerging applications are precise delineation of the tumor volume for radiation treatment planning, monitoring treatment, and providing prognostic information. The clinical role of 18F-FDG PET/CT in N0 disease is limited which is in line with findings of other imaging modalities. MRI is usually used for T staging with an intense discussion concerning the preferable imaging modality for regional lymph node staging as PET/CT, MRI, and multi-slice spiral CT are all improving rapidly. Is this review, we summarize recent literature on 18F-FDG PET and PET/CT imaging of head and neck cancer.

Prevalencia de consumo riesgoso y dañino de alcohol en derechohabientes del Instituto Mexicano del Seguro Social

Directory of Open Access Journals (Sweden)

Morales-García Juana Inés de la Cruz

2002-01-01

Full Text Available Objetivo. Medir la prevalencia de consumo riesgoso y dañino de alcohol en la población amparada por el Instituto Mexicano del Seguro Social (IMSS. Material y métodos. En un estudio transversal se entrevistaron 45 117 derechohabientes del IMSS, en las 36 delegaciones del país. Se aplicó un cuestionario estructurado y autoaplicable a cada sujeto usando el instrumento de tamizaje AUDIT (Alcohol Use Disorder Identification Test, el cual consta de 10 preguntas. Las tres primeras se relacionan con la cantidad y frecuencia del consumo de alcohol, las tres siguientes evalúan la dependencia y las cuatro últimas se refieren a problemas causados por el alcohol. Cada pregunta consta de tres a cinco opciones, a las que se les asignan valores progresivos de cero a cuatro. Se estimó la prevalencia de consumo, con intervalos de confianza al 95% (IC 95%. Resultados. La prevalencia de consumo problema de alcohol (riesgoso y dañino fue de 12.8% (IC 95% 12.5-13.2. El consumo fue mayor en hombres (22.2%; IC 95% 21.7-22.8 que en mujeres (3.4%; IC 95% 3.1-3.6. En los hombres se observó un efecto de edad, mientras que en las mujeres el consumo por edad fue más homogéneo. En ambos grupos el consumo fue más importante en la edad productiva. Conclusiones. La prevalencia de consumo de alcohol que constituye un problema para la salud, es elevada en la población derechohabiente del IMSS. Es necesario desarrollar políticas y programas de salud específicos, para disminuir este grave problema.

Imaging with PET system

International Nuclear Information System (INIS)

Das, B.K.; Noreen Norfaraheen Lee Abdullah

2012-01-01

PET deals with biochemistry and metabolic changes that occur at molecular level. Hence, PET differs fundamentally from other imaging modalities. CT imaging is based on tissue density, whereas MRI conveys anatomic information based on proton density and proton relaxation dynamics. CT and MRI are useful in clinical diagnosis only when disease process has caused significant anatomic alterations. However, in most disease conditions chemical changes precede anatomic changes, that can be detected by PET technology. Thus, PET can provide earliest and unique information about ongoing disease process long before anatomic or structural changes take place. There is no other modality available at present that can replace PET technology. Although PET produces cross-sectional images like that obtained in MRI or CT, they represent circulation, function and metabolism, and not anatomic structure. PET is extremely sensitive measuring quantitatively concentration of tracers in nano to pico-molar range. Thus, PET enables merger of biochemistry and biology in medicine giving birth to molecular medicine that focuses on identifying the molecular errors of disease leading to developing molecular corrections including gene therapy. Molecular imaging with PET has been playing a role in examining the biological nature of a disease condition and its characterization to guide selection and evaluation of treatment. (author)

Consumo de antioxidantes durante tratamento quimioterápico Antioxidants consumption during chemotherapy treatment

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Caroline Cavali Rohenkohl

2011-06-01

Full Text Available RACIONAL: O câncer é definido como enfermidade multicausal crônica, em que as células possuem crescimento descontrolado. Resulta de vários fatores, sendo um dos principais, a dieta inadequada. As fases de iniciação, promoção e progressão de carcinogênese têm sido frequentemente relacionadas ao estresse oxidativo. OBJETIVO: Verificar o consumo de antioxidantes em pacientes com câncer durante os diferentes ciclos de quimioterapia. MÉTODOS: Estudo descritivo exploratório, incluindo pacientes em tratamento quimioterápico em ambulatório de quimioterapia. Para investigar o consumo de antioxidantes foi elaborado um questionário de frequência alimentar semi-quantitativo (QFASQ e uma ficha de anamnese clinica - nutricional. RESULTADOS: Amostra foi composta por 30 pacientes com idade média de 56,4±2,3 anos. De acordo com o consumo diário representado pelos ciclos, houve adequado consumo de vitamina C, vitamina E e Zinco e inadequado consumo de vitamina A e Selênio. Ao dividir a tabela estudada segundo os quatro quartis de consumo diário de antioxidantes, houve consumo adequado de vitamina A em 25% da amostra e inadequado de vitamina C, vitamina E, zinco em 25% da amostra e de também selênio em todos os ciclos. Entre as fontes alimentares consideradas ricas nos antioxidantes estudados, as mais consumidas foram cenoura, espinafre, mamão, laranja, óleo de soja, óleo de girassol, carne vermelha, queijo e carne de frango. CONCLUSÃO: A população estudada atingiu o consumo diário recomendado para os antioxidantes analisados quando dividida nos ciclos do tratamento, mas houve porcentagem alta de consumo inadequado quando dividida nos quartis. Desta forma, a orientação nutricional é um fator indispensável para auxiliar na prevenção e controle do câncer.BACKGROUND: The cancer is defined as chronic multifactorial disease, in which cells have uncontrolled growth. Several factors contribute to its development, one of them is

Cost-effectiveness of PET and PET/Computed Tomography

DEFF Research Database (Denmark)

Gerke, Oke; Hermansson, Ronnie; Hess, Søren

2015-01-01

measure by means of incremental cost-effectiveness ratios when considering the replacement of the standard regimen by a new diagnostic procedure. This article discusses economic assessments of PET and PET/computed tomography reported until mid-July 2014. Forty-seven studies on cancer and noncancer...

Choline-PET/CT for imaging prostate cancer; Cholin-PET/CT zur Bildgebung des Prostatakarzinoms

Energy Technology Data Exchange (ETDEWEB)

Krause, Bernd Joachim [Klinik- und Poliklinik fuer Nuklearmedizin, Klinikum rechts der Isar, Technische Univ. Muenchen (Germany); Treiber, U.; Schwarzenboeck, S.; Souvatzoglou, M. [Klinik fuer Urologie, Klinikum rechts der Isar, Technische Univ. Muenchen (Germany)

2010-09-15

PET and PET/CT using [{sup 11}C]- and [{sup 18}F]-labelled choline derivatives are increasingly being used for imaging of prostate cancer. The value of PET and PET/CT with [{sup 11}C]- and [{sup 18}F]-labelled choline derivates in biochemical recurrence of prostate cancer has been examined in many studies and demonstrates an increasing importance. Primary prostate cancer can be detected with moderate sensitivity using PET and PET/CT using [{sup 11}C]- and [{sup 18}F]-labelled choline derivatives - the differentiation between benign prostatic hyperplasia, prostatitis or high-grade intraepithelial neoplasia (HGPIN) is not always possible. At the present time [{sup 11}C]choline PET/CT is not recommended in the primary setting but may be utilized in clinically suspected prostate cancer with repeatedly negative prostate biopsies, in preparation of a focused re-biopsy. Promising results have been obtained for the use of PET and PET/CT with [{sup 11}C]- and [{sup 18}F]-labelled choline derivates in patients with biochemical recurrence. The detection rate of choline PET and PET/CT for local, regional, and distant recurrence in patients with a biochemical recurrence shows a linear correlation with PSA values at the time of imaging and reaches about 75% in patients with PSA > 3 ng/mL. At PSA values below 1 ng/mL, the recurrence can be diagnosed with choline PET/CT in approximately 1/3 of the patients. PET and PET/CT with [{sup 11}C]- and [{sup 18}F]choline derivates can be helpful for choosing a therapeutic strategy in the sense of an individualized treatment: since an early diagnosis of recurrence is crucial to the choice of optimal treatment. The localization of the site of recurrence - local recurrence, lymph node metastasis or systemic dissemination - has important influence on the therapy regimen. (orig.)

Funcionamiento familiar y consumo de sustancias en adolescentes: el rol mediador de la autoestima

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Teresa I. Jiménez

2008-01-01

Full Text Available En el presente estudio ex post facto se analizan las relaciones directas e indirectas entre el funcionamiento familiar, la autoestima considerada desde una perspectiva multidimensional (autoestima familiar, escolar, social y física y el consumo de sustancias en una muestra de 414 adolescentes. Para el análisis de datos se utilizan matrices de correlaciones bivariadas, el cálculo de ecuaciones estructurales y se sigue el procedimiento de análisis de efectos mediadores. Los resultados muestran que las distintas dimensiones de la autoestima median conjuntamente el 82% de la relación entre el funcionamiento familiar y el consumo de sustancias de los adolescentes. Además, se observa, por un lado, un efecto protector de las autoestimas familiar y escolar frente a la implicación en el consumo de sustancias y, por otro, un efecto de riesgo de las autoestimas social y física. Finalmente, se discute el rol de la autoestima como un mediador para determinadas influencias del contexto familiar y como un recurso psicosocial paradójico en relación con el consumo de sustancias en la edad adolescente.

Patrón de consumo de alcohol en pacientes captados en salas de urgencias

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López-Jiménez Jorge Luis

1998-01-01

Full Text Available Objetivo. Describir los patrones de consumo de alcohol en personas de 15 años y más, captadas en los servicios de urgencias de ocho hospitales de la Ciudad de México. Material y métodos. La información se obtuvo mediante autorreportes. El levantamiento de los datos se realizó en cada hospital durante una semana completa, las 24 horas del día. Se incluyó a los pacientes que notificaron su consumo en los últimos doce meses. Resultados. De 2 523 individuos entrevistados, 63% informó haber consumido bebidas alcohólicas, entre las que destacan los destilados y la cerveza; 56.8% informó que, al menos una vez durante el último año, se había embriagado. En el patrón de consumo predomina la ingestión de baja frecuencia y alta cantidad (46.9%; sin embargo, se encontraron variaciones por sexo y edad principalmente, y se notificaron problemas asociados. Conclusiones. La descripción de patrones de consumo de alcohol en diferentes grupos poblacionales es relevante en el estudio de problemas personales, familiares y sociales asociados con la ingesta de alcohol.

Hybrid FDG-PET/MR compared to FDG-PET/CT in adult lymphoma patients.

Science.gov (United States)

Atkinson, Wendy; Catana, Ciprian; Abramson, Jeremy S; Arabasz, Grae; McDermott, Shanaugh; Catalano, Onofrio; Muse, Victorine; Blake, Michael A; Barnes, Jeffrey; Shelly, Martin; Hochberg, Ephraim; Rosen, Bruce R; Guimaraes, Alexander R

2016-07-01

The goal of this study is to evaluate the diagnostic performance of simultaneous FDG-PET/MR including diffusion compared to FDG-PET/CT in patients with lymphoma. Eighteen patients with a confirmed diagnosis of non-Hodgkin's (NHL) or Hodgkin's lymphoma (HL) underwent an IRB-approved, single-injection/dual-imaging protocol consisting of a clinical FDG-PET/CT and subsequent FDG-PET/MR scan. PET images from both modalities were reconstructed iteratively. Attenuation correction was performed using low-dose CT data for PET/CT and Dixon-MR sequences for PET/MR. Diffusion-weighted imaging was performed. SUVmax was measured and compared between modalities and the apparent diffusion coefficient (ADC) using ROI analysis by an experienced radiologist using OsiriX. Strength of correlation between variables was measured using the Pearson correlation coefficient (r p). Of the 18 patients included in this study, 5 had HL and 13 had NHL. The median age was 51 ± 14.8 years. Sixty-five FDG-avid lesions were identified. All FDG-avid lesions were visible with comparable contrast, and therefore initial and follow-up staging was identical between both examinations. SUVmax from FDG-PET/MR [(mean ± sem) (21.3 ± 2.07)] vs. FDG-PET/CT (mean 23.2 ± 2.8) demonstrated a strongly positive correlation [r s = 0.95 (0.94, 0.99); p < 0.0001]. There was no correlation found between ADCmin and SUVmax from FDG-PET/MR [r = 0.17(-0.07, 0.66); p = 0.09]. FDG-PET/MR offers an equivalent whole-body staging examination as compared with PET/CT with an improved radiation safety profile in lymphoma patients. Correlation of ADC to SUVmax was weak, understating their lack of equivalence, but not undermining their potential synergy and differing importance.

Expectativas, consumo de alcohol y problemas asociados en estudiantes universitarios de la ciudad de México

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Mora-Ríos Jazmín

2001-01-01

Full Text Available OBJETIVO: Establecer la relación entre las expectativas hacia el consumo de alcohol, los patrones de su uso y los problemas asociados a su consumo en una muestra de estudiantes universitarios de la ciudad de México. MATERIAL Y MÉTODOS: Estudio transversal realizado en octubre de 1998, en el que participaron 678 estudiantes, hombres y mujeres entre los 17 y 25 años de edad, provenientes de universidades públicas y privadas. En él se midieron las expectativas a partir de un cuestionario de autorreporte, el Alcohol Expectancy Questionnaire (AEQ, que fue adaptado a esta población obteniendo una consistencia interna global elevada (alpha=0.93. RESULTADOS: Del total de los estudiantes, 31% presentó un consumo alto (mayor a cinco copas por ocasión de consumo en el último año, principalmente en los varones, mientras que 17% fueron no consumidores. Mediante un modelo estructural de ecuaciones se estudió la relación entre las subescalas de expectativas, el patrón de consumo y problemas asociados. El análisis de varianza mostró una relación estadísticamente significativa entre seis subescalas de expectativas (el alcohol como facilitador de la interacción grupal, expresividad verbal, desinhibición, incremento de la sexualidad, reducción de la tensión psicológica e incremento de la agresividad y las variables sexo, consumo de alcohol y problemas asociados (F=5.23, gl=1, phttp://www.insp.mx/salud/index.html

Fatores associados ao consumo de dietas ricas em gordura em adultos de uma cidade no sul do Brasil

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Airton José Rombaldi

2014-05-01

Full Text Available O objetivo deste estudo foi descrever a frequência de consumo de dieta rica em gordura por adultos de 20 a 69 anos de Pelotas, RS, e analisar fatores associados. Foi realizado um estudo transversal de base populacional, incluindo 972 adultos. A frequência do consumo de gordura alimentar no ano anterior à pesquisa foi avaliada pelo questionário de Block, composto por quinze itens alimentares, pontuados de acordo com a frequência de consumo de alimentos com elevados teores de gordura. Cerca de 1/3 da população adulta (32,7% consumia regularmente dieta rica em gordura. Para ambos os sexos, o consumo regular de gordura mostrou-se associado a idades mais jovens e consumo regular de refrigerantes e, somente para homens, aos níveis econômicos A/B. A frequência do consumo regular de alimentos ricos em gordura na população adulta residente no município de Pelotas encontra-se além das recomendações atuais do Ministério da Saúde. Políticas públicas que estimulem uma alimentação saudável são urgentemente necessárias.

Clinical evaluation of PET image quality as a function of acquisition time in a new TOF-PET/MR compared to TOF-PET/CT - initial results

International Nuclear Information System (INIS)

Zeimpekis, Konstantinos; Huellner, Martin; De Galiza Barbosa, Felipe; Ter Voert, Edwin; Davison, Helen; Delso, Gaspar; Veit-Haibach, Patrick

2015-01-01

The recently available integrated PET/MR imaging can offer significant additional advances in clinical imaging. The purpose of this study was to compare the PET performance between a PET/CT scanner and an integrated TOF-PET/MR scanner concerning image quality parameters and quantification in terms of SUV as a function of acquisition time (a surrogate of dose). Five brain and five whole body patients were included in the study. The PET/CT scan was used as a reference and the PET/MR acquisition time was consecutively adjusted, taking into account the decay between the scans in order to expose both systems to the same amount of emitted signal. The acquisition times were then retrospectively reduced to assess the performance of the PET/MRI for lower count rates. Image quality, image sharpness, artifacts and noise were evaluated. SUV measurements were taken in the liver and in white matter to compare quantification. Quantitative evaluation showed good correlation between PET/CT and PET/MR brain SUVs. Liver correlation was lower, with uptake underestimation in PET/MR, partially justified by bio-redistribution. The clinical evaluation showed that PET/MR offers higher image quality and sharpness with lower levels of noise and artefacts compared to PET/CT with reduced acquisition times for whole body scans, while for brain scans there is no significant difference. The PET-component of the TOF-PET/MR showed higher image quality compared to PET/CT as tested with reduced imaging times. However, these results account mainly for body imaging, while no significant difference were found in brain imaging. This overall higher image quality suggests that the acquisition time or injected activity can be reduced by at least 37% on the PET/MR scanner.

Clinical evaluation of PET image quality as a function of acquisition time in a new TOF-PET/MR compared to TOF-PET/CT - initial results

Energy Technology Data Exchange (ETDEWEB)

Zeimpekis, Konstantinos; Huellner, Martin; De Galiza Barbosa, Felipe; Ter Voert, Edwin; Davison, Helen; Delso, Gaspar; Veit-Haibach, Patrick [Nuclear Medicine, University Hospital Zurich (Switzerland)

2015-05-18

The recently available integrated PET/MR imaging can offer significant additional advances in clinical imaging. The purpose of this study was to compare the PET performance between a PET/CT scanner and an integrated TOF-PET/MR scanner concerning image quality parameters and quantification in terms of SUV as a function of acquisition time (a surrogate of dose). Five brain and five whole body patients were included in the study. The PET/CT scan was used as a reference and the PET/MR acquisition time was consecutively adjusted, taking into account the decay between the scans in order to expose both systems to the same amount of emitted signal. The acquisition times were then retrospectively reduced to assess the performance of the PET/MRI for lower count rates. Image quality, image sharpness, artifacts and noise were evaluated. SUV measurements were taken in the liver and in white matter to compare quantification. Quantitative evaluation showed good correlation between PET/CT and PET/MR brain SUVs. Liver correlation was lower, with uptake underestimation in PET/MR, partially justified by bio-redistribution. The clinical evaluation showed that PET/MR offers higher image quality and sharpness with lower levels of noise and artefacts compared to PET/CT with reduced acquisition times for whole body scans, while for brain scans there is no significant difference. The PET-component of the TOF-PET/MR showed higher image quality compared to PET/CT as tested with reduced imaging times. However, these results account mainly for body imaging, while no significant difference were found in brain imaging. This overall higher image quality suggests that the acquisition time or injected activity can be reduced by at least 37% on the PET/MR scanner.

Medical application of PET technology

International Nuclear Information System (INIS)

Lim, Sang Moo; Choi, C. W.; An, S. H.; Woo, K. S.; Chung, W. S.; Yang, S. D.; Jun, G. S. and others

1999-04-01

We performed following studies using PET technology: 1. Clinical usefulness of [ 18 F]FDG whole body PET in malignant disease 2. Clinical usefulness of quantitative evaluation of F-18-FDG 3. Pilot study of C-11 methionine PET in brain tumor 4. PET study in patients with Parkinson's disease 5. A study on the clinical myocardial PET image. PET gives various metabolic information for the living human body, and is very important, new diagnostic modality. The PET study will give us the information of cancer patients such as early detection of cancer, staging, recurrence detection and characterization of cancer. The quantitative analysis using PET could be applied to evaluate the pathophysiology of various diseases and develop new drugs and develop new radiopharmaceuticals

Medical application of PET technology

Energy Technology Data Exchange (ETDEWEB)

Lim, Sang Moo; Choi, C. W.; An, S. H.; Woo, K. S.; Chung, W. S.; Yang, S. D.; Jun, G. S. and others

1999-04-01

We performed following studies using PET technology: 1. Clinical usefulness of [{sup 18}F]FDG whole body PET in malignant disease 2. Clinical usefulness of quantitative evaluation of F-18-FDG 3. Pilot study of C-11 methionine PET in brain tumor 4. PET study in patients with Parkinson's disease 5. A study on the clinical myocardial PET image. PET gives various metabolic information for the living human body, and is very important, new diagnostic modality. The PET study will give us the information of cancer patients such as early detection of cancer, staging, recurrence detection and characterization of cancer. The quantitative analysis using PET could be applied to evaluate the pathophysiology of various diseases and develop new drugs and develop new radiopharmaceuticals.

Consumo alimentar de beneficiários do programa Bolsa Família

OpenAIRE

Alan Giovanini de Oliveira Sartori

2014-01-01

A expansão do consumo de alimentos submetidos a elevado grau de processamento em países em desenvolvimento é notória. Em paralelo, observa-se o aumento na prevalência de excesso de peso e de comorbidades associadas. O fenômeno também tem sido observado em famílias consideradas pobres que recebem benefício financeiro de programa federal de transferência condicionada de renda. O objetivo geral foi analisar o consumo alimentar de beneficiários do Programa Bolsa Família (PBF). Foi elaborado um si...

Consumos identitarios juveniles. Construcciones comunicacionales recíprocas entre "chetos" y "cumbieros"

Directory of Open Access Journals (Sweden)

Norberto Leonardo Murolo

2011-03-01

Full Text Available El trabajo analiza la construcción identitaria de dos grupos de jóvenes argentinos, los denominados "chetos" y "cumbieros”. Se hace foco en sus usos y prácticas discursivas, estilos de vestimenta y su relación con el consumo de diversas mercancías, en especial con las tecnologías de la comunicación, donde se advierte que algunas mercancías tienen la particularidad de traspasar las barreras de las clases sociales y se han convertido en productos universales que proveen pertenencia mediante su consumo.

Significado cultural dos bens de consumo em um concurso de beleza infantil

OpenAIRE

Netto, Carla Freitas Silveira

2010-01-01

A presente dissertação tem como objetivo ampliar o conhecimento sobre o significado cultural dos bens de consumo, tendo como objeto o fenômeno dos concursos de beleza infantil e suas candidatas. Primeiramente, descrevo os concursos de beleza (adulto e infantil) expondo as principais discussões já geradas sobre o assunto, a fim de apresentar o contexto da pesquisa. Depois, realizo uma revisão teórica da temática dos significados culturais dos bens de consumo, do modelo de movimentação destes s...

Carne de consumo e risco de transmissão de Toxoplasma gondii

OpenAIRE

Rosado, Joana de Carvalho Serra

2009-01-01

O consumo de carne de suíno (Sus domesticus) é considerado o maior factor de risco para a transmissão da toxoplasmose aos humanos. No entanto, apesar dos suínos serem muito usados na gastronomia portuguesa, tanto pelo consumo de carne, como pelo de enchidos, pouco se sabe sobre a prevalência e caracterização genética de Toxoplasma gondii nestes produtos alimentares, no país. Neste trabalho, pretendeu-se determinar a seroprevalência de anticorpos IgG anti-T. gondii em suínos de ...

Software-based PET-MR image coregistration: combined PET-MRI for the rest of us

International Nuclear Information System (INIS)

Robertson, Matthew S.; Liu, Xinyang; Vyas, Pranav K.; Safdar, Nabile M.; Plishker, William; Zaki, George F.; Shekhar, Raj

2016-01-01

With the introduction of hybrid positron emission tomography/magnetic resonance imaging (PET/MRI), a new imaging option to acquire multimodality images with complementary anatomical and functional information has become available. Compared with hybrid PET/computed tomography (CT), hybrid PET/MRI is capable of providing superior anatomical detail while removing the radiation exposure associated with CT. The early adoption of hybrid PET/MRI, however, has been limited. To provide a viable alternative to the hybrid PET/MRI hardware by validating a software-based solution for PET-MR image coregistration. A fully automated, graphics processing unit-accelerated 3-D deformable image registration technique was used to align PET (acquired as PET/CT) and MR image pairs of 17 patients (age range: 10 months-21 years, mean: 10 years) who underwent PET/CT and body MRI (chest, abdomen or pelvis), which were performed within a 28-day (mean: 10.5 days) interval. MRI data for most of these cases included single-station post-contrast axial T1-weighted images. Following registration, maximum standardized uptake value (SUV max ) values observed in coregistered PET (cPET) and the original PET were compared for 82 volumes of interest. In addition, we calculated the target registration error as a measure of the quality of image coregistration, and evaluated the algorithm's performance in the context of interexpert variability. The coregistration execution time averaged 97±45 s. The overall relative SUV max difference was 7% between cPET-MRI and PET/CT. The average target registration error was 10.7±6.6 mm, which compared favorably with the typical voxel size (diagonal distance) of 8.0 mm (typical resolution: 0.66 mm x 0.66 mm x 8 mm) for MRI and 6.1 mm (typical resolution: 3.65 mm x 3.65 mm x 3.27 mm) for PET. The variability in landmark identification did not show statistically significant differences between the algorithm and a typical expert. We have presented a software

Software-based PET-MR image coregistration: combined PET-MRI for the rest of us

Energy Technology Data Exchange (ETDEWEB)

Robertson, Matthew S.; Liu, Xinyang; Vyas, Pranav K.; Safdar, Nabile M. [Children' s National Health System, Sheikh Zayed Institute for Pediatric Surgical Innovation, Washington, DC (United States); Plishker, William; Zaki, George F. [IGI Technologies, Inc., College Park, MD (United States); Shekhar, Raj [Children' s National Health System, Sheikh Zayed Institute for Pediatric Surgical Innovation, Washington, DC (United States); IGI Technologies, Inc., College Park, MD (United States)

2016-10-15

With the introduction of hybrid positron emission tomography/magnetic resonance imaging (PET/MRI), a new imaging option to acquire multimodality images with complementary anatomical and functional information has become available. Compared with hybrid PET/computed tomography (CT), hybrid PET/MRI is capable of providing superior anatomical detail while removing the radiation exposure associated with CT. The early adoption of hybrid PET/MRI, however, has been limited. To provide a viable alternative to the hybrid PET/MRI hardware by validating a software-based solution for PET-MR image coregistration. A fully automated, graphics processing unit-accelerated 3-D deformable image registration technique was used to align PET (acquired as PET/CT) and MR image pairs of 17 patients (age range: 10 months-21 years, mean: 10 years) who underwent PET/CT and body MRI (chest, abdomen or pelvis), which were performed within a 28-day (mean: 10.5 days) interval. MRI data for most of these cases included single-station post-contrast axial T1-weighted images. Following registration, maximum standardized uptake value (SUV{sub max}) values observed in coregistered PET (cPET) and the original PET were compared for 82 volumes of interest. In addition, we calculated the target registration error as a measure of the quality of image coregistration, and evaluated the algorithm's performance in the context of interexpert variability. The coregistration execution time averaged 97±45 s. The overall relative SUV{sub max} difference was 7% between cPET-MRI and PET/CT. The average target registration error was 10.7±6.6 mm, which compared favorably with the typical voxel size (diagonal distance) of 8.0 mm (typical resolution: 0.66 mm x 0.66 mm x 8 mm) for MRI and 6.1 mm (typical resolution: 3.65 mm x 3.65 mm x 3.27 mm) for PET. The variability in landmark identification did not show statistically significant differences between the algorithm and a typical expert. We have presented a software

PREVALENCIA Y CARACTERÍSTICAS DEL CONSUMO DE TABACO EN ADOLESCENTES DEL COLEGIO UNIVERSITARIO SANTIAGO DE CALI

Directory of Open Access Journals (Sweden)

Yamileth Ortiz Gómez

2009-04-01

Full Text Available Antecedentes. El consumo de tabaco es responsable del 90 por ciento de los cánceres de pulmón; su uso está en los primeros lugares de América Latina y el Caribe. Objetivo. Identificar la prevalencia del consumo de tabaco, los conocimientos, actitudes, exposición, influencia de medios de comunicación e intervenciones curriculares frente al consumo de los adolescentes del colegio Santiago de Cali. Material y métodos. Estudio transversal con muestra representativa de 286 estudiantes de sexto a noveno grado, fueron seleccionados con muestreo aleatorio equiprobabilístico al grado escolar. Se utilizó EMTAJOVEN para medir el consumo de tabaco a partir del auto-reporte del último mes, clasificando en no consumidores, consumidores experimentales, actuales y regulares. Se calcularon proporciones con intervalos de confianza al 95 por ciento; prueba de normalidad y análisis para encontrar diferencias con T–student o prueba U Mann-Whitney y Chi2. Resultados. La prevalencia del consumo 40,5 por ciento [IC 95% 34,8-46,4], sin encontrar diferencias por género (p=0,058. Los hombres consideran que si fuman tienen más amigos y se ven más atractivos (p

EL CONSUMO DE AUTOMÓVILES EN LA AMÉRICA LATINA Y EL CARIBE (1902-1930

Directory of Open Access Journals (Sweden)

César Yáñez

2011-01-01

Full Text Available El automóvil como bien de consumo duradero se difunde en la América Latina en el primer tercio del siglo XX. El comercio exterior determina su consumo en la región, a excepción de algunos países que en el decenio de los veinte consiguen instrumentar plantas de ensamblaje de automóviles con piezas importadas, lo que ocurre solamente allí donde coincide una cierta dimensión del mercado con una renta alta (Argentina, Brasil, México y Uruguay. Otros factores explicativos, aun-que en un claro segundo plano, son la extensión de medidas proteccionistas y una mayor desigualdad en la distribución de la renta. Al respecto proponemos que hubo un efecto negativo en el consumo final cuando el consumo se sesgó hacia los automóviles de gama más cara; en tanto que en los países donde el consumo por habitante es alto se consumen cantidades proporcionalmente altas de vehículos de la gama de precios bajos. Las importaciones de automóviles muestran buena parte del consumo de automóviles y nos permiten calcular los vehículos en circulación, además de indicar cuales fueron los países en los que se desarrollaron experiencias propias en la producción de autos. El papel que en ellas desempeña los Estados Unidos es casi absoluto a partir de 1920, después de la primera Guerra Mundial, aunque anteriormente tiene que compartir buena parte del, aún reducido mercado, con varios países europeos (Francia, Italia, Alemania y Gran Bretaña.

Consumo de nutrientes em adultos e idosos em estudo de base populacional: Projeto Bambuí

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Aline Cristine Souza Lopes

Full Text Available Inquérito alimentar populacional em amostra aleatória de 550 indivíduos > ou = 18 anos, realizado em Bambuí, Minas Gerais, Brasil, utilizando o Questionário Semiquantitativo de Freqüência Alimentar e recordatório 24 horas calibrados pela técnica de regressão linear. A análise constou de comparação de médias, teste de qui-quadrado e razão de adequação do nutriente (RAN-adequada: 90,0-110,0%. Foi baixo o percentual da população que apresentou RAN de acordo com o recomendado para consumo de carboidratos (2,4%, proteínas (17,6%, vitaminas (0,0-5,1% e minerais (0-21,1%. Diferenças de acordo com sexo e idade foram encontradas: 90,2% e 91,8% de mulheres apresentaram baixo consumo de ferro e vitamina B6, respectivamente. Ao contrário, 87,7% dos homens relataram consumo excessivo de ferro, 80,3% de fósforo e 11,9% de colesterol. Quanto à idade, 64,3% de idosos (> 60 anos relataram baixa ingestão protéica e 39,3% apresentavam inadequação das frações lipídicas; sendo que 35,7% informaram consumo excessivo de ácidos graxos saturados. Dos adultos (18-59 anos, 67,8% relataram excessivo consumo protéico e 53,4% ingestão insuficiente de ferro. Alto e inadequado consumo de lipídios e baixa ingestão de fibras, vitaminas e minerais, constituem problema importante de saúde pública por possivelmente contribuir para o aumento das doenças crônicas não transmissíveis.

Competitive advantage of PET/MRI

Energy Technology Data Exchange (ETDEWEB)

Jadvar, Hossein, E-mail: jadvar@usc.edu; Colletti, Patrick M.

2014-01-15

Multimodality imaging has made great strides in the imaging evaluation of patients with a variety of diseases. Positron emission tomography/computed tomography (PET/CT) is now established as the imaging modality of choice in many clinical conditions, particularly in oncology. While the initial development of combined PET/magnetic resonance imaging (PET/MRI) was in the preclinical arena, hybrid PET/MR scanners are now available for clinical use. PET/MRI combines the unique features of MRI including excellent soft tissue contrast, diffusion-weighted imaging, dynamic contrast-enhanced imaging, fMRI and other specialized sequences as well as MR spectroscopy with the quantitative physiologic information that is provided by PET. Most evidence for the potential clinical utility of PET/MRI is based on studies performed with side-by-side comparison or software-fused MRI and PET images. Data on distinctive utility of hybrid PET/MRI are rapidly emerging. There are potential competitive advantages of PET/MRI over PET/CT. In general, PET/MRI may be preferred over PET/CT where the unique features of MRI provide more robust imaging evaluation in certain clinical settings. The exact role and potential utility of simultaneous data acquisition in specific research and clinical settings will need to be defined. It may be that simultaneous PET/MRI will be best suited for clinical situations that are disease-specific, organ-specific, related to diseases of the children or in those patients undergoing repeated imaging for whom cumulative radiation dose must be kept as low as reasonably achievable. PET/MRI also offers interesting opportunities for use of dual modality probes. Upon clear definition of clinical utility, other important and practical issues related to business operational model, clinical workflow and reimbursement will also be resolved.

Competitive advantage of PET/MRI.

Science.gov (United States)

Jadvar, Hossein; Colletti, Patrick M

2014-01-01

Multimodality imaging has made great strides in the imaging evaluation of patients with a variety of diseases. Positron emission tomography/computed tomography (PET/CT) is now established as the imaging modality of choice in many clinical conditions, particularly in oncology. While the initial development of combined PET/magnetic resonance imaging (PET/MRI) was in the preclinical arena, hybrid PET/MR scanners are now available for clinical use. PET/MRI combines the unique features of MRI including excellent soft tissue contrast, diffusion-weighted imaging, dynamic contrast-enhanced imaging, fMRI and other specialized sequences as well as MR spectroscopy with the quantitative physiologic information that is provided by PET. Most evidence for the potential clinical utility of PET/MRI is based on studies performed with side-by-side comparison or software-fused MRI and PET images. Data on distinctive utility of hybrid PET/MRI are rapidly emerging. There are potential competitive advantages of PET/MRI over PET/CT. In general, PET/MRI may be preferred over PET/CT where the unique features of MRI provide more robust imaging evaluation in certain clinical settings. The exact role and potential utility of simultaneous data acquisition in specific research and clinical settings will need to be defined. It may be that simultaneous PET/MRI will be best suited for clinical situations that are disease-specific, organ-specific, related to diseases of the children or in those patients undergoing repeated imaging for whom cumulative radiation dose must be kept as low as reasonably achievable. PET/MRI also offers interesting opportunities for use of dual modality probes. Upon clear definition of clinical utility, other important and practical issues related to business operational model, clinical workflow and reimbursement will also be resolved. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

Competitive advantage of PET/MRI

International Nuclear Information System (INIS)

Jadvar, Hossein; Colletti, Patrick M.

2014-01-01

Multimodality imaging has made great strides in the imaging evaluation of patients with a variety of diseases. Positron emission tomography/computed tomography (PET/CT) is now established as the imaging modality of choice in many clinical conditions, particularly in oncology. While the initial development of combined PET/magnetic resonance imaging (PET/MRI) was in the preclinical arena, hybrid PET/MR scanners are now available for clinical use. PET/MRI combines the unique features of MRI including excellent soft tissue contrast, diffusion-weighted imaging, dynamic contrast-enhanced imaging, fMRI and other specialized sequences as well as MR spectroscopy with the quantitative physiologic information that is provided by PET. Most evidence for the potential clinical utility of PET/MRI is based on studies performed with side-by-side comparison or software-fused MRI and PET images. Data on distinctive utility of hybrid PET/MRI are rapidly emerging. There are potential competitive advantages of PET/MRI over PET/CT. In general, PET/MRI may be preferred over PET/CT where the unique features of MRI provide more robust imaging evaluation in certain clinical settings. The exact role and potential utility of simultaneous data acquisition in specific research and clinical settings will need to be defined. It may be that simultaneous PET/MRI will be best suited for clinical situations that are disease-specific, organ-specific, related to diseases of the children or in those patients undergoing repeated imaging for whom cumulative radiation dose must be kept as low as reasonably achievable. PET/MRI also offers interesting opportunities for use of dual modality probes. Upon clear definition of clinical utility, other important and practical issues related to business operational model, clinical workflow and reimbursement will also be resolved

Validating PET segmentation of thoracic lesions-is 4D PET necessary?

DEFF Research Database (Denmark)

Nielsen, M. S.; Carl, J.

2017-01-01

Respiratory-induced motions are prone to degrade the positron emission tomography (PET) signal with the consequent loss of image information and unreliable segmentations. This phantom study aims to assess the discrepancies relative to stationary PET segmentations, of widely used semiautomatic PET...... segmentation methods on heterogeneous target lesions influenced by motion during image acquisition. Three target lesions included dual F-18 Fluoro-deoxy-glucose (FDG) tracer concentrations as high-and low tracer activities relative to the background. Four different tracer concentration arrangements were...... segmented using three SUV threshold methods (Max40%, SUV40% and 2.5SUV) and a gradient based method (GradientSeg). Segmentations in static 3D-PET scans (PETsta) specified the reference conditions for the individual segmentation methods, target lesions and tracer concentrations. The motion included PET...

FDG PET and PET/CT : EANM procedure guidelines for tumour PET imaging: version 1.0

NARCIS (Netherlands)

Boellaard, Ronald; O'Doherty, Mike J.; Weber, Wolfgang A.; Mottaghy, Felix M.; Lonsdale, Markus N.; Stroobants, Sigrid G.; Oyen, Wim J. G.; Kotzerke, Joerg; Hoekstra, Otto S.; Pruim, Jan; Marsden, Paul K.; Tatsch, Klaus; Hoekstra, Corneline J.; Visser, Eric P.; Arends, Bertjan; Verzijlbergen, Fred J.; Zijlstra, Josee M.; Comans, Emile F. I.; Lammertsma, Adriaan A.; Paans, Anne M.; Willemsen, Antoon T.; Beyer, Thomas; Bockisch, Andreas; Schaefer-Prokop, Cornelia; Delbeke, Dominique; Baum, Richard P.; Chiti, Arturo; Krause, Bernd J.

The aim of this guideline is to provide a minimum standard for the acquisition and interpretation of PET and PET/CT scans with [18F]-fluorodeoxyglucose (FDG). This guideline will therefore address general information about [18F]-fluorodeoxyglucose (FDG) positron emission tomography-computed

FDG PET and PET/CT: EANM procedure guidelines for tumour PET imaging: version 1.0

NARCIS (Netherlands)

Boellaard, Ronald; O'Doherty, Mike J.; Weber, Wolfgang A.; Mottaghy, Felix M.; Lonsdale, Markus N.; Stroobants, Sigrid G.; Oyen, Wim J. G.; Kotzerke, Joerg; Hoekstra, Otto S.; Pruim, Jan; Marsden, Paul K.; Tatsch, Klaus; Hoekstra, Corneline J.; Visser, Eric P.; Arends, Bertjan; Verzijlbergen, Fred J.; Zijlstra, Josee M.; Comans, Emile F. I.; Lammertsma, Adriaan A.; Paans, Anne M.; Willemsen, Antoon T.; Beyer, Thomas; Bockisch, Andreas; Schaefer-Prokop, Cornelia; Delbeke, Dominique; Baum, Richard P.; Chiti, Arturo; Krause, Bernd J.

2010-01-01

The aim of this guideline is to provide a minimum standard for the acquisition and interpretation of PET and PET/CT scans with [18F]-fluorodeoxyglucose (FDG). This guideline will therefore address general information about[18F]-fluorodeoxyglucose (FDG) positron emission tomography-computed

FDG PET and PET/CT: EANM procedure guidelines for tumour PET imaging: version 1.0

NARCIS (Netherlands)

Boellaard, R.; O'Doherty, M.J.; Weber, W.A.; Mottaghy, F.M.; Lonsdale, M.N.; Stroobants, S.G.; Oyen, W.J.G.; Kotzerke, J.; Hoekstra, O.S.; Pruim, J.; Marsden, P.K.; Tatsch, K.; Hoekstra, C.J.; Visser, E.P.; Arends, B.; Verzijlbergen, F.J.; Zijlstra, J.M.; Comans, E.F.I.; Lammertsma, A.A.; Paans, A.M.; Willemsen, A.T.; Beyer, T.; Bockisch, A.; Schaefer-Prokop, C.; Delbeke, D.; Baum, R.P.; Chiti, A.; Krause, B.J.

2010-01-01

The aim of this guideline is to provide a minimum standard for the acquisition and interpretation of PET and PET/CT scans with [18F]-fluorodeoxyglucose (FDG). This guideline will therefore address general information about [18F]-fluorodeoxyglucose (FDG) positron emission tomography-computed

Reproducibility of Quantitative Brain Imaging Using a PET-Only and a Combined PET/MR System

Directory of Open Access Journals (Sweden)

Martin L. Lassen

2017-07-01

Full Text Available The purpose of this study was to test the feasibility of migrating a quantitative brain imaging protocol from a positron emission tomography (PET-only system to an integrated PET/MR system. Potential differences in both absolute radiotracer concentration as well as in the derived kinetic parameters as a function of PET system choice have been investigated. Five healthy volunteers underwent dynamic (R-[11C]verapamil imaging on the same day using a GE-Advance (PET-only and a Siemens Biograph mMR system (PET/MR. PET-emission data were reconstructed using a transmission-based attenuation correction (AC map (PET-only, whereas a standard MR-DIXON as well as a low-dose CT AC map was applied to PET/MR emission data. Kinetic modeling based on arterial blood sampling was performed using a 1-tissue-2-rate constant compartment model, yielding kinetic parameters (K1 and k2 and distribution volume (VT. Differences for parametric values obtained in the PET-only and the PET/MR systems were analyzed using a 2-way Analysis of Variance (ANOVA. Comparison of DIXON-based AC (PET/MR with emission data derived from the PET-only system revealed average inter-system differences of −33 ± 14% (p < 0.05 for the K1 parameter and −19 ± 9% (p < 0.05 for k2. Using a CT-based AC for PET/MR resulted in slightly lower systematic differences of −16 ± 18% for K1 and −9 ± 10% for k2. The average differences in VT were −18 ± 10% (p < 0.05 for DIXON- and −8 ± 13% for CT-based AC. Significant systematic differences were observed for kinetic parameters derived from emission data obtained from PET/MR and PET-only imaging due to different standard AC methods employed. Therefore, a transfer of imaging protocols from PET-only to PET/MR systems is not straightforward without application of proper correction methods.Clinical Trial Registration:www.clinicaltrialsregister.eu, identifier 2013-001724-19

Obtención de una medida del consumo nacional de comidas.

Directory of Open Access Journals (Sweden)

Álvarez Martínez, Pedro

2004-01-01

Full Text Available En España el gasto de alimentos representa un alto porcentaje del total de presupuesto de los hogares. El presupuesto se reparte como sigue: carne (29%, frutas, legumbres, veduras y patatas (19%, productos lácteos, huevos y quesos (14%, pan y cereales (13%, pescado (13%, grasas y aceites (4%, otros alimentos (8%. El consumo de alimentos está afectado no solo por factores económicos sino también por hábitos, gustos, antecedentes culturales y forma de vida. Por tanto un importante un objetivo importante para los investigadores es medir la importancia relativa de estos factores, y cuales de ellos determinan la preferencia. Estas preferencias son diferentes para gente que viven en ciudades de distintas población. Este hecho es debido a diferentes antecedentes culturales, factores sociales, y cambios de sistemas de distribución. El objetivo de este trabajo es aplicar una nueva metodología que nos permita obtener una medida de las preferencias en el consumo de los alimentos conociendo solo la cantidad de dinero semanal que los hogares gastan en cada una de los alimentos, y detectar así posibles hábitos de consumo.

Evaluation of PeneloPET Simulations of Biograph PET/CT Scanners

Science.gov (United States)

Abushab, K. M.; Herraiz, J. L.; Vicente, E.; Cal-González, J.; España, S.; Vaquero, J. J.; Jakoby, B. W.; Udías, J. M.

2016-06-01

Monte Carlo (MC) simulations are widely used in positron emission tomography (PET) for optimizing detector design, acquisition protocols, and evaluating corrections and reconstruction methods. PeneloPET is a MC code based on PENELOPE, for PET simulations which considers detector geometry, acquisition electronics and materials, and source definitions. While PeneloPET has been successfully employed and validated with small animal PET scanners, it required a proper validation with clinical PET scanners including time-of-flight (TOF) information. For this purpose, we chose the family of Biograph PET/CT scanners: the Biograph True-Point (B-TP), Biograph True-Point with TrueV (B-TPTV) and the Biograph mCT. They have similar block detectors and electronics, but a different number of rings and configuration. Some effective parameters of the simulations, such as the dead-time and the size of the reflectors in the detectors, were adjusted to reproduce the sensitivity and noise equivalent count (NEC) rate of the B-TPTV scanner. These parameters were then used to make predictions of experimental results such as sensitivity, NEC rate, spatial resolution, and scatter fraction (SF), from all the Biograph scanners and some variations of them (energy windows and additional rings of detectors). Predictions agree with the measured values for the three scanners, within 7% (sensitivity and NEC rate) and 5% (SF). The resolution obtained for the B-TPTV is slightly better (10%) than the experimental values. In conclusion, we have shown that PeneloPET is suitable for simulating and investigating clinical systems with good accuracy and short computational time, though some effort tuning of a few parameters of the scanners modeled may be needed in case that the full details of the scanners studied are not available.

Muerte cerebral causada por consumo de psicofármacos

OpenAIRE

Iglesias Rozas, José Rafael, 1942-

1987-01-01

Tres imágenes de una biopsia de un cerebro en estado de muerte cerebral causada por consumo de psicofármacos. Three pictures of a biopsy of a brain that has died because of consumption of psychoactive drugs.

SU-F-I-57: Evaluate and Optimize PET Acquisition Overlap in 18F-FDG Oncology Wholebody PET/CT: Can We Scan PET Faster?

International Nuclear Information System (INIS)

Zhang, J; Natwa, M; Hall, NC; Knopp, MV; Knopp, MU; Zhang, B; Tung, C

2016-01-01

Purpose: The longer patient has to remain on the table during PET imaging, the higher the likelihood of motion artifacts due to patient discomfort. This study was to investigate and optimize PET acquisition overlap in 18F-FDG oncology wholebody PET/CT to speed up PET acquisition and improve patient comfort. Methods: Wholebody 18F-FDG PET/CT of phantoms, 8 pre-clinical patients (beagles) and 5 clinical oncology patients were performed in 90s/bed on a time-of-flight Gemini TF 64 system. Imaging of phantoms and beagles was acquired with reduced PET overlaps (40%, 33%, 27%, 20%, 13% and no overlap) in addition to the system default (53%). In human studies, 1 or 2 reduced overlaps from the listed options were used to acquire PET/CT sweeps right after the default standard of care imaging. Image quality was blindly reviewed using visual scoring criteria and quantitative SUV assessment. NEMA PET sensitivity was performed under different overlaps. Results: All PET exams demonstrated no significant impact on the visual grades for overlaps >20%. Blinded reviews assigned the best visual scores to PET using overlaps 53%–27%. Reducing overlap to 27% for oncology patients (12-bed) saved an average of ∼40% acquisition time (11min) compared to using the default overlap (18min). No significant SUV variances were found when reducing overlap to half of default for cerebellum, lung, heart, aorta, liver, fat, muscle, bone marrow, thighs and target lesions (p>0.05), except expected variability in urinary system. Conclusion: This study demonstrated by combined phantom, pre-clinical and clinical PET/CT scans that PET acquisition overlap in axial of today’s systems can be reduced and optimized. It showed that a reduction of PET acquisition overlap to 27% (half of system default) can be implemented to reduce table time by ∼40% to improve patient comfort and minimize potential motion artifacts, without prominently degrading image quality or compromising PET quantification.

SU-F-I-57: Evaluate and Optimize PET Acquisition Overlap in 18F-FDG Oncology Wholebody PET/CT: Can We Scan PET Faster?

Energy Technology Data Exchange (ETDEWEB)

Zhang, J; Natwa, M; Hall, NC; Knopp, MV [The Ohio State University, Columbus, OH (United States); Knopp, MU [Pepperdine University, Malibu, CA (United States); Zhang, B; Tung, C [Philips Healthcare, Highland Heights, OH (United States)

2016-06-15

Purpose: The longer patient has to remain on the table during PET imaging, the higher the likelihood of motion artifacts due to patient discomfort. This study was to investigate and optimize PET acquisition overlap in 18F-FDG oncology wholebody PET/CT to speed up PET acquisition and improve patient comfort. Methods: Wholebody 18F-FDG PET/CT of phantoms, 8 pre-clinical patients (beagles) and 5 clinical oncology patients were performed in 90s/bed on a time-of-flight Gemini TF 64 system. Imaging of phantoms and beagles was acquired with reduced PET overlaps (40%, 33%, 27%, 20%, 13% and no overlap) in addition to the system default (53%). In human studies, 1 or 2 reduced overlaps from the listed options were used to acquire PET/CT sweeps right after the default standard of care imaging. Image quality was blindly reviewed using visual scoring criteria and quantitative SUV assessment. NEMA PET sensitivity was performed under different overlaps. Results: All PET exams demonstrated no significant impact on the visual grades for overlaps >20%. Blinded reviews assigned the best visual scores to PET using overlaps 53%–27%. Reducing overlap to 27% for oncology patients (12-bed) saved an average of ∼40% acquisition time (11min) compared to using the default overlap (18min). No significant SUV variances were found when reducing overlap to half of default for cerebellum, lung, heart, aorta, liver, fat, muscle, bone marrow, thighs and target lesions (p>0.05), except expected variability in urinary system. Conclusion: This study demonstrated by combined phantom, pre-clinical and clinical PET/CT scans that PET acquisition overlap in axial of today’s systems can be reduced and optimized. It showed that a reduction of PET acquisition overlap to 27% (half of system default) can be implemented to reduce table time by ∼40% to improve patient comfort and minimize potential motion artifacts, without prominently degrading image quality or compromising PET quantification.

Consumo de pornografía on-line y off-line en adolescentes colombianos

Directory of Open Access Journals (Sweden)

Reynaldo Rivera

2016-01-01

Full Text Available El consumo de medios de comunicación se ha incrementado notablemente en los últimos años. Una consecuencia no deseada de ello es la proliferación de consumos de riesgo, como es el caso de la pornografía on-line y off-line. Aunque la literatura ha señalado una serie de variables predictoras (edad, género, etnia, nivel socioeconómico o estructura familiar, estudios recientes han sugerido incluir los valores y los estilos de vida como factores asociados a las decisiones de consumo. El objetivo del presente trabajo fue examinar si los estilos de vida relacionales de los adolescentes son predictores relevantes del consumo de pornografía tanto en Internet como en revistas o vídeos. Se empleó un diseño observacional transversal que incluyó una muestra representativa de 9.942 adolescentes colombianos (Medad=14,93, DT=2,47. Los estilos de vida, controlando el efecto de variables sociodemográficas, estructurales e individuales, fueron sometidos a un análisis de regresión múltiple y a un análisis de mediación. Los resultados indicaron que el estilo intrafamiliar positivo estuvo asociado con una reducción en el consumo de pornografía, sin embargo, tanto el estilo intrafamiliar negativo como el de independencia relacional incrementan el mismo. Además se propone que los estilos relacionales familiares pueden mediar la relación entre los valores positivos y el comportamiento de riesgo on-line y off-line. Finalmente, se realiza una discusión de los resultados desde la perspectiva relacional y su aplicación en programas de educación mediática.

Interference between PET and MRI sub-systems in a silicon-photomultiplier-based PET/MRI system

International Nuclear Information System (INIS)

Yamamoto, Seiichi; Watabe, Hiroshi; Kanai, Yasukazu; Hatazawa, Jun; Aoki, Masaaki; Sugiyama, Eiji; Watabe, Tadashi; Imaizumi, Masao; Shimosegawa, Eku

2011-01-01

The silicon-photomultiplier (Si-PM) is a promising photodetector, especially for integrated PET/MRI systems, due to its small size, high gain, and low sensitivity to static magnetic fields. The major problem using a Si-PM-based PET system within the MRI system is the interference between the PET and MRI units. We measured the interference by combining a Si-PM-based PET system with a permanent-magnet MRI system. When the RF signal-induced pulse height exceeded the lower energy threshold level of the PET system, interference between the Si-PM-based PET system and MRI system was detected. The prompt as well as the delayed coincidence count rates of the Si-PM-based PET system increased significantly. These noise counts produced severe artifacts on the reconstructed images of the Si-PM-based PET system. In terms of the effect of the Si-PM-based PET system on the MRI system, although no susceptibility artifact was observed on the MR images, electronic noise from the PET detector ring was detected by the RF coil and reduced the signal-to-noise ratio (S/N) of the MR images. The S/N degradation of the MR images was reduced when the distance between the RF coil and the Si-PM-based PET system was increased. We conclude that reducing the interference between the PET and MRI systems is essential for achieving the optimum performance of integrated Si-PM PET/MRI systems.

Consumo, acesso e sociabilidade

OpenAIRE

Canclini, Nestor García; Universidad Autónoma Metropolitana

2010-01-01

Este artigo é uma adaptação, feita pelo autor, da palestra de abertura que iria realizar no 3º Encontro ESPM de Comunicação e Marketing – participação impossibilitada pela epidemia globalizada.   Entendendo o consumo como um cenário de disputas entre as determinações da esfera da produção e os diferentes modos de apropriação social dos bens e serviços, o autor argumenta que as transformações na produção cultural e no acesso à cultura trazidas pela industrialização, globalização e digitalizaçã...

[F-18]FDG imaging of head and neck tumors: comparison of hybrid PET, dedicated PET and CT

International Nuclear Information System (INIS)

Dresel, S.; Brinkbaeumer, K.; Schmid, R.; Poepperl, G.; Hahn, K.; Szeimies, U.

2001-01-01

Aim: Aim of the study was to evaluate [F-18]FDG imaging of head and neck tumors using a Hybrid-PET device of the 2nd or 3rd generation. Examinations were compared to dedicated PET and Spiral-CT. Methods: 54 patients suffering from head and neck tumors were examined using dedicated PET and Hybrid-PET after injection of 185-350 MBq [F-18]FDG. Examinations were carried out on the dedicated PET first followed by a scan on the Hybrid-PET. Dedicated PET was acquired in 3D mode, Hybrid-PET was performed in list mode using an axial filter. Reconstruction of data was performed iteratively on both, dedicated PET and Hybrid-PET. All patients received a CT scan in multislice technique. All finding have been verified by the goldstandard histology or in case of negative histology by follow up. Results: Using dedicated PET the primary or recurrent lesion was correctly diagnosed in 47/48 patients, using Hybrid-PET in 46/48 patients and using CT in 25/48 patients. Metastatic disease in cervical lymph nodes was diagnosed in 17/18 patients with dedicated PET, in 16/18 patients with Hybrid-PET and in 15/18 with CT. False positive results with regard to lymph node metastasis were seen with one patient for dedicated PET and Hybrid-PET, respectively, and with 18 patients for CT. In a total of 11 patients unknown metastastic lesions were seen with dedicated PET and with Hybrid-PET elsewhere in the body. Additional malignant disease other than the head and neck tumor was found in 4 patients. Conclusion: Using Hybrid-PET for [F-18]FDG imaging reveals a loss of sensitivity and specificity of about 1-5% as compared to dedicated PET in head and neck tumors. [F-18]FDG PET with both, dedicated PET and Hybrid-PET is superior to CT in the diagnosis of primary or recurrent lesions as well as in the assessment of lymph node involvement. (orig.) [de

The spatial distribution of pet dogs and pet cats on the island of Ireland

Directory of Open Access Journals (Sweden)

More Simon J

2011-06-01

Full Text Available Abstract Background There is considerable international research regarding the link between human demographics and pet ownership. In several international studies, pet ownership was associated with household demographics including: the presence of children in the household, urban/rural location, level of education and age/family structure. What is lacking across all these studies, however, is an understanding of how these pets are spatially distributed throughout the regions under study. This paper describes the spatial distribution of pet dog and pet cat owning households on the island of Ireland. Results In 2006, there were an estimated 640,620 pet dog owning households and 215,542 pet cat owning households in Ireland. These estimates are derived from logistic regression modelling, based on household composition to determine pet dog ownership and the type of house to determine pet cat ownership. Results are presented using chloropleth maps. There is a higher density of pet dog owning households in the east of Ireland and in the cities than the west of Ireland and rural areas. However, in urban districts there are a lower proportion of households owning pet dogs than in rural districts. There are more households with cats in the urban areas, but the proportion of households with cats is greater in rural areas. Conclusions The difference in spatial distribution of dog ownership is a reflection of a generally higher density of households in the east of Ireland and in major cities. The higher proportion of ownership in the west is understandable given the higher proportion of farmers and rural dwellings in this area. Spatial representation allows us to visualise the impact of human household distribution on the density of both pet dogs and pet cats on the island of Ireland. This information can be used when analysing risk of disease spread, for market research and for instigating veterinary care.

FDG PET and PET/CT: EANM procedure guidelines for tumour PET imaging: version 1.0

DEFF Research Database (Denmark)

Boellaard, Ronald; O'Doherty, Mike J; Weber, Wolfgang A

2010-01-01

The aim of this guideline is to provide a minimum standard for the acquisition and interpretation of PET and PET/CT scans with [18F]-fluorodeoxyglucose (FDG). This guideline will therefore address general information about[18F]-fluorodeoxyglucose (FDG) positron emission tomography-computed tomogr...

Consumo de sustancias psicoactivas y trastornos de la personalidad: estudio comparativo entre personas consumidoras y no consumidoras

Directory of Open Access Journals (Sweden)

Carolina Luna Guerrero

2017-07-01

Full Text Available El estudio de la personalidad en sujetos adictos es clave para comprender la relación que media entre el sujeto, la droga y el ambiente. Las investigaciones que se han realizado en Colombia sobre este tema han estado centradas en la correspondencia entre el consumo y la personalidad normal; sin embargo, en el ámbito internacional, se insiste en la importancia de ampliar el marco comprensivo hacia las relaciones entre el consumo y los trastornos de la personalidad. El objetivo de este estudio fue identificar diferencias en el perfil de trastornos de personalidad de sujetos pertenecientes a una comunidad terapéutica para el tratamiento del consumo de sustancias psicoactivas de la ciudad de Bogotá-Colombia y población de comparación. Para este estudio participaron 30 personas con edades comprendidas entre los 17 y los 28 años. Se utilizó, para evaluar el nivel de consumo de sustancias, la Escala CRAFFT (CARLOS y, para evaluar los trastornos de la personalidad, el Inventario Multifásico de la Personalidad de Minnesota (MMPI-2. Los resultados muestran relaciones importantes entre el consumo y diversos rasgos de la personalidad; resaltan las relaciones encontradas en las escalas de desviación psicopática y esquizofrenia, lo que haría pensar en el nexo entre el consumo y las conductas de oposición a la norma. A diferencia de otros estudios, en este se encuentran bajos puntajes en la escala de depresión en consumidores, lo que podría señalar una característica propia de la población en tratamiento. Frente a la variable género y consumo en estas comunidades, la evidencia sigue siendo mixta.

PET/MR in oncology

DEFF Research Database (Denmark)

Balyasnikova, Svetlana; Löfgren, Johan; de Nijs, Robin

2012-01-01

of the challenges inherent in this new technology, but focus on potential applications for simultaneous PET/MR in the field of oncology. Methods and tracers for use with the PET technology will be familiar to most readers of this journal; thus this paper aims to provide a short and basic introduction to a number...... be applied together with PET increasing the amount of information about the tissues of interest. The potential clinical benefit of applying PET/MR in staging, radiotherapy planning and treatment evaluation in oncology, as well as the research perspectives for the use of PET/MR in the development of new...

18F-FDG PET of the hands with a dedicated high-resolution PEM system (arthro-PET): correlation with PET/CT, radiography and clinical parameters.

Science.gov (United States)

Mhlanga, Joyce C; Carrino, John A; Lodge, Martin; Wang, Hao; Wahl, Richard L

2014-12-01

The aim of this study was to prospectively determine the feasibility and compare the novel use of a positron emission mammography (PEM) scanner with standard PET/CT for evaluating hand osteoarthritis (OA) with (18)F-FDG. Institutional review board approval and written informed consent were obtained for this HIPAA-compliant prospective study in which 14 adults referred for oncological (18)F-FDG PET/CT underwent dedicated hand PET/CT followed by arthro-PET using the PEM device. Hand radiographs were obtained and scored for the presence and severity of OA. Summed qualitative and quantitative joint glycolytic scores for each modality were compared with the findings on plain radiography and clinical features. Eight patients with clinical and/or radiographic evidence of OA comprised the OA group (mean age 73 ± 7.7 years). Six patients served as the control group (53.7 ± 9.3 years). Arthro-PET quantitative and qualitative joint glycolytic scores were highly correlated with PET/CT findings in the OA patients (r = 0.86. p = 0.007; r = 0.94, p = 0.001). Qualitative arthro-PET and PET/CT joint scores were significantly higher in the OA patients than in controls (38.7 ± 6.6 vs. 32.2 ± 0.4, p = 0.02; 37.5 ± 5.4 vs. 32.2 ± 0.4, p = 0.03, respectively). Quantitative arthro-PET and PET/CT maximum SUV-lean joint scores were higher in the OA patients, although they did not reach statistical significance (20.8 ± 4.2 vs. 18 ± 1.8, p = 0.13; 22.8 ± 5.38 vs. 20.1 ± 1.54, p = 0.21). By definition, OA patients had higher radiographic joint scores than controls (30.9 ± 31.3 vs. 0, p = 0.03). Hand imaging using a small field of view PEM system (arthro-PET) with FDG is feasible, performing comparably to PET/CT in assessing metabolic joint activity. Arthro-PET and PET/CT showed higher joint FDG uptake in OA. Further exploration of arthro-PET in arthritis management is warranted.

Consumo e custo de recursos materiais em unidades pediátricas de terapia intensiva e semi-intensiva

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Larissa Lenotti Zuliani

2012-12-01

Full Text Available O gerenciamento de custos de materiais de consumo hospitalar é um tema atual em pesquisa, principalmente em unidades de saúde especializadas. Os enfermeiros são destacados como os principais gestores do consumo e custo de materiais hospitalares. Neste estudo, objetivou-se caracterizar unidades pediátricas semi-intensivas e intensivas de um hospital de ensino e verificar o consumo e os custos de materiais utilizados na assistência a pacientes internados nessas unidades. Estudo descritivo, exploratório, retrospectivo, com abordagem quantitativa; os dados foram obtidos do Sistema de Informação Hospitalar; analisados com base na classificação ABC. O gasto médio foi semelhante entre as UTIs cardiológica e neonatal e menor nas UTI e semi-intensiva pediátricas; houve variação significativa de consumo mensal de materiais; os materiais de maior custo tiveram mais impacto no orçamento das unidades estudadas. Os dados obtidos revelaram a importância do uso de método sistêmico de análise de consumo e gastos de materiais em unidades pediátricas e subsidiam ações administrativas de economia.

Deep-inspiration breath-hold PET/CT versus free breathing PET/CT and respiratory gating PET for reference. Evaluation in 95 patients with lung cancer

International Nuclear Information System (INIS)

Kawano, Tsuyoshi; Ohtake, Eiji; Inoue, Tomio

2011-01-01

The objective of this study was to define the factors that correlate with differences in maximum standardized uptake value (SUV max ) in deep-inspiration breath-hold (DIBH) and free breathing (FB) positron emission tomography (PET)/CT admixed with respiratory gating (RG) PET for reference. Patients (n=95) with pulmonary lesions were evaluated at one facility over 33 months. After undergoing whole-body PET/CT, a RG PET and FB PET/CT scans were obtained, followed by a DIBH PET/CT scan. All scans were recorded using a list-mode dynamic collection method with respiratory gating. The RG PET was reconstructed using phase gating without attenuation correction; the FB PET was reconstructed from the RG PET sinogram datasets with attenuation correction. Respiratory motion distance, breathing cycle speed, and waveform of RG PET were recorded. The SUV max of FB PET/CT and DIBH PET/CT were recorded: the percent difference in SUV max between the FB and DIBH scans was defined as the %BH-index. The %BH-index was significantly higher for lesions in the lower lung area than in the upper lung area. Respiratory motion distance was significantly higher in the lower lung area than in the upper lung area. A significant relationship was observed between the %BH-index and respiratory motion distance. Waveforms without steady end-expiration tended to show a high %BH-index. Significant inverse relationships were observed between %BH-index and cycle speed, and between respiratory motion distance and cycle speed. Decrease in SUV max of FB PET/CT was due to tumor size, distribution of lower lung, long respiratory movement at slow breathing cycle speeds, and respiratory waveforms without steady end-expiration. (author)

Clinical Evaluation of PET Image Quality as a Function of Acquisition Time in a New TOF-PET/MRI Compared to TOF-PET/CT--Initial Results.

Science.gov (United States)

Zeimpekis, Konstantinos G; Barbosa, Felipe; Hüllner, Martin; ter Voert, Edwin; Davison, Helen; Veit-Haibach, Patrick; Delso, Gaspar

2015-10-01

The purpose of this study was to compare only the performance of the PET component between a TOF-PET/CT (henceforth noted as PET/CT) scanner and an integrated TOF-PET/MRI (henceforth noted as PET/MRI) scanner concerning image quality parameters and quantification in terms of standardized uptake value (SUV) as a function of acquisition time (a surrogate of dose). The CT and MR image quality were not assessed, and that is beyond the scope of this study. Five brain and five whole-body patients were included in the study. The PET/CT scan was used as a reference and the PET/MRI acquisition time was consecutively adjusted, taking into account the decay between the scans in order to expose both systems to the same amount of the emitted signal. The acquisition times were then retrospectively reduced to assess the performance of the PET/MRI for lower count rates. Image quality, image sharpness, artifacts, and noise were evaluated. SUV measurements were taken in the liver and in the white matter to compare quantification. Quantitative evaluation showed strong correlation between PET/CT and PET/MRI brain SUVs. Liver correlation was good, however, with lower uptake estimation in PET/MRI, partially justified by bio-redistribution. The clinical evaluation showed that PET/MRI offers higher image quality and sharpness with lower levels of noise and artifacts compared to PET/CT with reduced acquisition times for whole-body scans while for brain scans there is no significant difference. The TOF-PET/MRI showed higher image quality compared to TOF-PET/CT as tested with reduced imaging times. However, this result accounts mainly for body imaging, while no significant differences were found in brain imaging.

Evacuating People and Their Pets: Older Floridians' Need for and Proximity to Pet-Friendly Shelters.

Science.gov (United States)

Douglas, Rachel; Kocatepe, Ayberk; Barrett, Anne E; Ozguven, Eren Erman; Gumber, Clayton

2017-10-04

Pets influence evacuation decisions, but little is known about pet-friendly emergency shelters' availability or older adults' need for them. Our study addresses this issue, focusing on the most densely populated area of Florida (Miami-Dade)-the state with the oldest population and greatest hurricane susceptibility. We use Geographic Information Systems (GIS)-based methodology to identify the shortest paths to pet-friendly shelters, based on distance and congested and uncongested travel times-taking into account the older population's spatial distribution. Logistic regression models using the 2013 American Housing Survey's Disaster Planning Module examine anticipated shelter use as a function of pet ownership and requiring pet evacuation assistance. Thirty-four percent of older adults in the Miami-Dade area have pets-35% of whom report needing pet evacuation assistance. However, GIS accessibility measures show that travel time factors are likely to impede older adults' use of the area's few pet-friendly shelters. Logistic regression results reveal that pet owners are less likely to report anticipating shelter use; however, the opposite holds for pet owners reporting they would need help evacuating their pets-they anticipate using shelters. High pet shelter need coupled with low availability exacerbates older adults' heightened vulnerability during Florida's hurricane season. © The Author 2017. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Role of FDG-PET and PET/CT in the diagnosis of prolonged febrile states

International Nuclear Information System (INIS)

Jaruskova, M.; Belohlavek, O.

2006-01-01

The role of FDG-PET and PET/CT in patients whose main symptom is prolonged fever has not yet been defined. We addressed this topic in a retrospective study. A total of 124 patients (referred between May 2001 and December 2004) with fever of unknown origin or prolonged fever due to a suspected infection of a joint or vascular prosthesis were included in the study. The patients underwent either FDG-PET or FDG-PET/CT scanning. Sixty-seven patients had a negative focal FDG-PET finding; in this group the method was regarded as unhelpful in determining a diagnosis, and no further investigation was pursued. We tried to obtain clinical confirmation for all patients with positive PET findings. Fifty-seven (46%) patients had positive FDG-PET findings. In six of them no further clinical information was available. Fifty-one patients with positive PET findings and 118 patients in total were subsequently evaluated. Systemic connective tissue disease was confirmed in 17 patients, lymphoma in three patients, inflammatory bowel disease in two patients, vascular prosthesis infection in seven patients, infection of a hip or knee replacement in seven patients, mycotic aneurysm in two patients, abscess in four patients and AIDS in one patient. In eight (16%) patients the finding was falsely positive. FDG-PET or PET/CT contributed to establishing a final diagnosis in 84% of the 51 patients with positive PET findings and in 36% of all 118 evaluated patients with prolonged fever. (orig.)

La controversial Ritalina: ¿Cómo es su consumo en Costa Rica?

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Carolina Santamaría Ulloa

2007-01-01

Full Text Available El déficit atencional y déficit atencional con hiperactividad son trastornos que se diagnostican cada vez con mayor frecuencia en la población infantil en edad escolar. Este fenómeno ha generado un aumento en el consumo de Ritalina. Con el objetivo de determinar la prevalencia de estos trastornos en Costa Rica, y la magnitud del consumo de Ritalina, se utilizó información proporcionada por el Ministerio de Salud sobre la venta del medicamento durante un período de 30 meses entre el 2000 y el 2003. Se encontró que a pesar de que la prevalencia es baja en términos globales, su distribución geográfica es muy heterogénea. En la Región Central Norte el consumo es 11 veces mayor que en la Brunca. Se recomienda impulsar la homogenización de criterios para el diagnóstico de estos trastornos, con el fin de mejorar la atención y tratamiento de los niños que así lo requieran.

Bacteriophages safely reduce Salmonella contamination in pet food and raw pet food ingredients.

Science.gov (United States)

Soffer, Nitzan; Abuladze, Tamar; Woolston, Joelle; Li, Manrong; Hanna, Leigh Farris; Heyse, Serena; Charbonneau, Duane; Sulakvelidze, Alexander

2016-01-01

Contamination of pet food with Salmonella is a serious public health concern, and several disease outbreaks have recently occurred due to human exposure to Salmonella tainted pet food. The problem is especially challenging for raw pet foods (which include raw meats, seafood, fruits, and vegetables). These foods are becoming increasingly popular because of their nutritional qualities, but they are also more difficult to maintain Salmonella -free because they lack heat-treatment. Among various methods examined to improve the safety of pet foods (including raw pet food), one intriguing approach is to use bacteriophages to specifically kill Salmonella serotypes. At least 2 phage preparations (SalmoFresh® and Salmonelex™) targeting Salmonella are already FDA cleared for commercial applications to improve the safety of human foods. However, similar preparations are not yet available for pet food applications. Here, we report the results of evaluating one such preparation (SalmoLyse®) in reducing Salmonella levels in various raw pet food ingredients (chicken, tuna, turkey, cantaloupe, and lettuce). Application of SalmoLyse® in low (ca. 2-4×10 6 PFU/g) and standard (ca. 9×10 6 PFU/g) concentrations significantly ( P contamination in all raw foods examined compared to control treatments. When SalmoLyse®-treated (ca. 2×10 7 PFU/g) dry pet food was fed to cats and dogs, it did not trigger any deleterious side effects in the pets. Our data suggest that the bacteriophage cocktail lytic for Salmonella can significantly and safely reduce Salmonella contamination in various raw pet food ingredients.

The MiniPET: a didactic PET system

International Nuclear Information System (INIS)

Pedro, R; Silva, J; Maio, A; Gurriana, L; Silva, J M; Augusto, J Soares

2013-01-01

The MiniPET project aims to design and build a small PET system. It consists of two 4 × 4 matrices of 16 LYSO scintillator crystals and two PMTs with 16 channels resulting in a low cost system with the essential functionality of a clinical PET instrument. It is designed to illustrate the physics of the PET technique and to provide a didactic platform for the training of students and nuclear imaging professionals as well as for scientific outreach. The PET modules can be configured to test for the coincidence of 511 keV gamma rays. The model has a flexible mechanical setup [1] and can simulate 14 diferent ring geometries, from a configuration with as few as 18 detectors per ring (ring radius φ=51 mm), up to a geometry with 70 detectors per ring (φ=200 mm). A second version of the electronic system [2] allowed measurement and recording of the energy deposited in 4 detector channels by photons from a 137 Cs radioactive source and by photons resulting of the annihilation of positrons from a 22 Na radioactive source. These energy spectra are used for detector performance studies, as well as angular dependency studies. In this paper, the mechanical setup, the front-end high-speed analog electronics, the digital acquisition and control electronics implemented in a FPGA, as well as the data-transfer interface between the FPGA board and a host PC are described. Recent preliminary results obtained with the 4 active channels in the prototype are also presented.

Recommendations for the use of PET and PET-CT for radiotherapy planning in research projects.

Science.gov (United States)

Somer, E J; Pike, L C; Marsden, P K

2012-08-01

With the increasing use of positron emission tomography (PET) for disease staging, follow-up and therapy monitoring in a number of oncological indications there is growing interest in the use of PET and PET-CT for radiation treatment planning. In order to create a strong clinical evidence base for this, it is important to ensure that research data are clinically relevant and of a high quality. Therefore the National Cancer Research Institute PET Research Network make these recommendations to assist investigators in the development of radiotherapy clinical trials involving the use of PET and PET-CT. These recommendations provide an overview of the current literature in this rapidly evolving field, including standards for PET in clinical trials, disease staging, volume delineation, intensity modulated radiotherapy and PET-augmented planning techniques, and are targeted at a general audience. We conclude with specific recommendations for the use of PET in radiotherapy planning in research projects.

Quantitative simultaneous PET-MR imaging

Science.gov (United States)

Ouyang, Jinsong; Petibon, Yoann; Huang, Chuan; Reese, Timothy G.; Kolnick, Aleksandra L.; El Fakhri, Georges

2014-06-01

Whole-body PET is currently limited by the degradation due to patient motion. Respiratory motion degrades imaging studies of the abdomen. Similarly, both respiratory and cardiac motions significantly hamper the assessment of myocardial ischemia and/or metabolism in perfusion and viability cardiac PET studies. Based on simultaneous PET-MR, we have developed robust and accurate MRI methods allowing the tracking and measurement of both respiratory and cardiac motions during abdominal or cardiac studies. Our list-mode iterative PET reconstruction framework incorporates the measured motion fields into PET emission system matrix as well as the time-dependent PET attenuation map and the position dependent point spread function. Our method significantly enhances the PET image quality as compared to conventional methods.

Selected PET radiomic features remain the same.

Science.gov (United States)

Tsujikawa, Tetsuya; Tsuyoshi, Hideaki; Kanno, Masafumi; Yamada, Shizuka; Kobayashi, Masato; Narita, Norihiko; Kimura, Hirohiko; Fujieda, Shigeharu; Yoshida, Yoshio; Okazawa, Hidehiko

2018-04-17

We investigated whether PET radiomic features are affected by differences in the scanner, scan protocol, and lesion location using 18 F-FDG PET/CT and PET/MR scans. SUV, TMR, skewness, kurtosis, entropy, and homogeneity strongly correlated between PET/CT and PET/MR images. SUVs were significantly higher on PET/MR 0-2 min and PET/MR 0-10 min than on PET/CT in gynecological cancer ( p = 0.008 and 0.008, respectively), whereas no significant difference was observed between PET/CT, PET/MR 0-2 min , and PET/MR 0-10 min images in oral cavity/oropharyngeal cancer. TMRs on PET/CT, PET/MR 0-2 min , and PET/MR 0-10 min increased in this order in gynecological cancer and oral cavity/oropharyngeal cancer. In contrast to conventional and histogram indices, 4 textural features (entropy, homogeneity, SRE, and LRE) were not significantly different between PET/CT, PET/MR 0-2 min , and PET/MR 0-10 min images. 18 F-FDG PET radiomic features strongly correlated between PET/CT and PET/MR images. Dixon-based attenuation correction on PET/MR images underestimated tumor tracer uptake more significantly in oral cavity/oropharyngeal cancer than in gynecological cancer. 18 F-FDG PET textural features were affected less by differences in the scanner and scan protocol than conventional and histogram features, possibly due to the resampling process using a medium bin width. Eight patients with gynecological cancer and 7 with oral cavity/oropharyngeal cancer underwent a whole-body 18 F-FDG PET/CT scan and regional PET/MR scan in one day. PET/MR scans were performed for 10 minutes in the list mode, and PET/CT and 0-2 min and 0-10 min PET/MR images were reconstructed. The standardized uptake value (SUV), tumor-to-muscle SUV ratio (TMR), skewness, kurtosis, entropy, homogeneity, short-run emphasis (SRE), and long-run emphasis (LRE) were compared between PET/CT, PET/MR 0-2 min , and PET/MR 0-10 min images.

Practical use and implementation of PET in children in a hospital PET centre

DEFF Research Database (Denmark)

Borgwardt, Lise; Larsen, Helle Jung; Pedersen, Kate

2003-01-01

Children are not just small adults-they differ in their psychology, normal physiology and pathophysiology, and various aspects should be considered when planning a positron emission tomography (PET) scan in a child. PET in children is a growing area, and this article describes the practical use...... and implementation of PET in children in a hospital PET centre. It is intended to be of use to nuclear medicine departments implementing or starting to implement PET scans in children. Topics covered are: dealing with children, dosimetry, organisation within the department and relations with other departments......, preparation of the child (provision of information to the child and parents and the fasting procedure), the imaging procedure (resting, tracer injection, positioning, sedation and bladder emptying) and pitfalls in the interpretation of PET scans in children, including experiences with telemedicine....

Practical use and implementation of PET in children in a hospital PET centre

International Nuclear Information System (INIS)

Borgwardt, Lise; Larsen, Helle Jung; Pedersen, Kate; Hoejgaard, Liselotte

2003-01-01

Children are not just small adults - they differ in their psychology, normal physiology and pathophysiology, and various aspects should be considered when planning a positron emission tomography (PET) scan in a child. PET in children is a growing area, and this article describes the practical use and implementation of PET in children in a hospital PET centre. It is intended to be of use to nuclear medicine departments implementing or starting to implement PET scans in children. Topics covered are: dealing with children, dosimetry, organisation within the department and relations with other departments, preparation of the child (provision of information to the child and parents and the fasting procedure), the imaging procedure (resting, tracer injection, positioning, sedation and bladder emptying) and pitfalls in the interpretation of PET scans in children, including experiences with telemedicine. (orig.)

Practical use and implementation of PET in children in a hospital PET centre

Energy Technology Data Exchange (ETDEWEB)

Borgwardt, Lise; Larsen, Helle Jung; Pedersen, Kate; Hoejgaard, Liselotte [Department of Clinical Physiology, Nuclear Medicine and PET, University Hospital of Copenhagen, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen (Denmark)

2003-10-01

Children are not just small adults - they differ in their psychology, normal physiology and pathophysiology, and various aspects should be considered when planning a positron emission tomography (PET) scan in a child. PET in children is a growing area, and this article describes the practical use and implementation of PET in children in a hospital PET centre. It is intended to be of use to nuclear medicine departments implementing or starting to implement PET scans in children. Topics covered are: dealing with children, dosimetry, organisation within the department and relations with other departments, preparation of the child (provision of information to the child and parents and the fasting procedure), the imaging procedure (resting, tracer injection, positioning, sedation and bladder emptying) and pitfalls in the interpretation of PET scans in children, including experiences with telemedicine. (orig.)

Healthy Pets and People

Science.gov (United States)

... prevent the spread of germs between pets and people. Keep pets and their supplies out of the kitchen, and ... a local wildlife rehabilitation facility. More Information Healthy Pets Healthy People Clean Hands Save Lives! Stay Healthy at Animal ...

Respiração e produção de etanol e de etileno em mangas armazenadas sob diferentes concentrações de dióxido de carbono e oxigênio

Directory of Open Access Journals (Sweden)

BENDER RENAR JOÃO

2000-01-01

Full Text Available O objetivo deste trabalho foi avaliar a respiração e produção de etanol e etileno em mangas armazenadas sob reduzidas concentrações de oxigênio (O2 e elevadas concentrações de dióxido de carbono (CO2. Mangas pré-climatéricas das cultivares Kent e Tommy Atkins foram armazenadas, sob fluxo contínuo, por 14 ou 21 dias, a 12°C em três concentrações de O2: 3%, 5% ou 21% em mistura com concentrações de 5%, 15%, 25%, 35%, 45%, 50% ou 70% de CO2. O tratamento-testemunha constou de armazenagem em ar sob fluxo contínuo. Após o período em atmosfera controlada (AC, as mangas foram transferidas e mantidas por 5 dias em ar a 20°C. Mangas sob concentrações de 50% e 70% de CO2 produziram mais etanol que nas demais concentrações de CO2. A redução para 3% de O2 na atmosfera de armazenagem aparentemente não teve efeito adicional ao CO2 na produção de etanol. A atividade respiratória de mangas em AC com CO2 acima de 45% foi muito mais intensa do que a respiração sob as concentrações de CO2 mais baixas; a produção de etileno, no entanto, esteve suprimida, e, mesmo após a transferência para ar, não se recuperou, permanecendo inferior aos demais tratamentos. A queda na atividade respiratória das mangas armazenadas a 50% e 70% de CO2, quando foram transferidas para ar a 20°C indica que as elevadas concentrações de CO2 causaram dano irreparável aos tecidos.

Consumo de bebidas alcohólicas en pacientes de los servicios de urgencias de la ciudad de Pachuca, Hidalgo

Directory of Open Access Journals (Sweden)

Borges Guilherme

1999-01-01

Full Text Available Se estudió la prevalencia del consumo y el abuso en la ingestión de alcohol entre los casos de urgencias médicas, accidentes y violencias atendidaos en las salas de urgencias de tres hospitales del sector salud de la ciudad de Pachuca, Hidalgo. Material y métodos. Se aplicó un cuestionario y se hizo una medición de alcohol en sangre a las personas que solicitaron atención por primera vez en estos servicios de urgencias. El cuestionario recabó datos demográficos, patrones de consumo de alcohol, escalas para medir la dependencia y el consumo riesgoso de alcohol, tales como el CAGE y el Alcohol Use Disorders Identification Test (AUDIT. Se comparó, por medio de la prueba ji², el consumo de alcohol entre los pacientes que ingresaron por un accidente o acto de violencia y aquellos que ingresaron debido a una urgencia médica. Resultados. Se evaluaron 1 511 pacientes. El consumo fue mayor y más frecuente en los pacientes que ingresaron por un accidente o porque fueron víctimas de la violencia, en comparación con las urgencias médicas. De los pacientes con accidentes o víctimas de la violencia, 17.7% fueron positivos al alcosensor y 15.8% notificaron consumo de alcohol en las seis horas previas al accidente. El CAGE detectó como dependiente a 9.2% de los casos, y 10.9% calificaron como bebedores riesgosos según el AUDIT. Conclusiones. El consumo de bebidas alcohólicas, especialmente en los pacientes atendidos en los servicios de urgencias debido a un accidente o acto de violencia, es elevado. Son indispensables las medidas preventivas para disminuir el costo individual y social del abuso en el consumo de alcohol en esta población.

La historia familiar y la conducta de consumo de alcohol como factor sociocultural en el adolescente. Perspectiva de enfermería

Directory of Open Access Journals (Sweden)

Nora Angélica Armendáriz-García

2015-01-01

Full Text Available Los adolescentes con mayor probabilidad de presentar la conducta de consumo de alcohol son los que están sometidos a diferentes factores de riesgo, los cuales pueden ser personales; dentro de estos factores se encuentra la historia familiar de consumo de alcohol (HFCA. Objetivo: establecer las diferencias y la relación entre el factor personal sociocultural a través de la HFCA y la conducta no sa- ludable de consumo de alcohol en adolescentes de preparatoria del Estado de Nuevo León. Materiales y métodos: estudio descriptivo correlacional, la población estuvo conformada por 743 adolescentes de preparatoria, la muestra fue de 240, con un poder del 90 % . Mues- treo aleatorio estratificado con asignación proporcional al tamaño del estrato. Dentro de cada estrato se empleó muestreo aleatorio por conglomerados unietápicos. Los instrumentos empleados fueron el Inventario de HFCA y el Cuestionario de Identificación de los Trastor- nos debidos al Consumo de Alcohol. Resultados: los adolescentes con HFCA positiva fueron quienes presentaron mayores prevalencias de conducta no saludable (consumo de alcohol; asimismo, el tipo de consumo de alcohol dependiente y dañino presentó esta misma tendencia observándose diferencias estadísticamente significativas (p < 0,05. Cuando se analiza la conducta de consumo de alcohol en los adolescentes se identificó una relación positiva y significativa ( r s = 0,196, p < 0,01, lo que indica que a mayor consumo de alcohol por parte de los padres, se presenta un mayor consumo por parte del hijo adolescente.

Determinantes do consumo de frutas e hortaliças em adolescentes por regressão quantílica

Directory of Open Access Journals (Sweden)

Roberta Schein Bigio

2011-06-01

Full Text Available OBJETIVO: Analisar o consumo de frutas, legumes e verduras (FLV de adolescentes e identificar fatores associados. MÉTODOS: Estudo transversal de base populacional com amostra representativa de 812 adolescentes de ambos os sexos de São Paulo, SP, em 2003. O consumo alimentar foi medido pelo recordatório alimentar de 24 horas. O consumo de FLV foi descrito em percentis e para investigar a associação entre a ingestão de FLV e variáveis explanatórias; foram utilizados modelos de regressão quantílica. RESULTADOS: Dos adolescentes entrevistados, 6,4% consumiram a recomendação mínima de 400 g/dia de FLV e 22% não consumiram nenhum tipo de FLV. Nos modelos de regressão quantílica, ajustados pelo consumo energético, faixa etária e sexo, a renda domiciliar per capita e a escolaridade do chefe de família associaram-se positivamente ao consumo de FLV, enquanto o hábito de fumar associou-se negativamente. Renda associou-se significativamente aos menores percentis de ingestão (p20 ao p55; tabagismo aos percentis intermediários (p45 ao p75 e escolaridade do chefe de família aos percentis finais de consumo de FLV (p70 ao p95. CONCLUSÕES: O consumo de FLV por adolescentes paulistanos mostrou-se abaixo das recomendações do Ministério da Saúde e é influenciado pela renda domiciliar per capita, pela escolaridade do chefe de família e pelo hábito de fumar.

Circuitos subalternos de consumo: sobre cópias baratas, falsificações e quinquilharias

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Ludmila Brandão

2008-09-01

Full Text Available O fenômeno global de consumo de objetos chamados aqui made in China − de baixo valor, baixa qualidade e utilidade reduzida −, que compõem certo universo kitsch contemporâneo, é o foco deste texto. O objetivo é abordá-lo do ponto de vista das práticas de consumo, visitando as referências teóricas mais recentes, desde Mary Douglas a García Canclini, a ponto de podermos considerar esses objetos ao modo de outros bens, mas que se organizam segundo o que denominamos circuitos subalternos de consumo. Palavras-chave: Consumo; made in China; subalterno; quinquilharia. ABSTRACT The global phenomenon of consumption of objects called here “made in China” − consumption of low price, low quality and reduced utility −, which compose a certain contemporary kitsch universe, is the focus of this text. The objective is to approach it from the viewpoint of consumption practices departing from the most recent theoretical frameworks, sinceMary Douglas until García Canclini, in order to analyze these objects the way we do with other goods but that are organized like subaltern circuits of consumption. Keywords: Consumption; “made in China”; subaltern; knick-knack.

Clinical Nononcologic Applications of PET/CT and PET/MRI in Musculoskeletal, Orthopedic, and Rheumatologic Imaging.

Science.gov (United States)

Gholamrezanezhad, Ali; Basques, Kyle; Batouli, Ali; Matcuk, George; Alavi, Abass; Jadvar, Hossein

2018-06-01

With improvements in PET/CT and PET/MRI over the last decade, as well as increased understanding of the pathophysiology of musculoskeletal diseases, there is an emerging potential for PET as a primary or complementary modality in the management of rheumatologic and orthopedic conditions. We discuss the role of PET/CT and PET/MRI in nononcologic musculoskeletal disorders, including inflammatory and infectious conditions and postoperative complications. There is great potential for an increased role for PET to serve as a primary or complementary modality in the management of orthopedic and rheumatologic disorders.

Influence of PET/CT-introduction on PET scanning frequency and indications. Results of a multicenter study

International Nuclear Information System (INIS)

Stergar, H.; Bockisch, A.; Eschmann, S.M.; Krause, B.J.; Roedel, R.; Tiling, R.; Weckesser, M.

2007-01-01

Aim: to evaluate the influence of the introduction of combined PET/CT scanners into clinical routine. This investigation addresses the quantitative changes between PET/CT and stand alone PET. Methods: the study included all examinations performed on stand alone PET- or PET/CT-scanners within 12 month prior to and after implementation of PET/CT. The final data analysis included five university hospitals and a total number of 15 497 exams. We distinguished exams on stand alone tomographs prior to and after installation of the combined device as well as PET/CT scans particularly with regard to disease entities. Various further parameters were investigated. Results: the overall number of PET scans (PET and PET/CT) rose by 146% while the number of scans performed on stand alone scanners declined by 22%. Only one site registered an increase in stand alone PET. The number of exams for staging in oncology increased by 196% while that of cardiac scans decreased by 35% and the number of scans in neurology rose by 47%. The use of scans for radiotherapy planning increased to 7% of all PET/CT studies. The increase of procedures for so-called classic PET oncology indications was moderate compared to the more common tumors. An even greater increase was observed in some rare entities. Conclusions: the introduction of PET/CT led to more than a doubling of overall PET procedures with a main focus on oncology. Some of the observed changes in scanning frequency may be caused by a rising availability of new radiotracers and advancements of competing imaging methods. Nevertheless the evident increase in the use of PET/CT for the most common tumour types demonstrates its expanding role in cancer staging. The combination of molecular and morphologic imaging has not only found its place but is still gaining greater importance with new developments in technology and radiochemistry. (orig.)