bluuebunny/crossref_metadata_2025 huggingface dataset:
APLICAÇÃO DA TÉCNICA DE MANUTENÇÃO CENTRADA EM CONFIABILIDADE, COMO METODOLOGIA NA MANUFATURA SUBSTRATIVA DE USINAGEM EM CILINDROS
Authors: Campos Luciana Aparecida de , Moura Roque Antônio de
Published: February 2020

A falta de confiabilidade em máquinas e equipamentos, nas atividades produtivas, causam falhas que comprometem a disponibilidade do equipamento, reduzindo assim a competitividade de tal forma que afetem os negócios da organização. Este trabalho propõe a utilização da ferramenta módulo de falhas e seus efeitos aplicando na manutenção centrada na confiabilidade, respeitando o histórico do equipamento, suas peculiaridades e condições de uso. O método, além de vasta pesquisa literária, contará com a análise, levantamento e histórico necessários para adoção de uma disponibilidade confiável na aplicação de análise de falhas integrado à um torno computadorizado visando reduzir as ocorrências das falhas. O resultado além, do conhecimento disponível, contribuirá com uma abordagem mais abrangente possível e detalhada, embasada em uma vasta revisão bibliográfica detalhada que culminará com análise crítica. Nesse viés conclui-se que utilizando a metodologia de pesquisa-ação, reduziu as falhas.
PENGARUH POSISI BUKU SUMBER MATA TEMPEL DAN KONSENTRASI ATONIK TERHADAP PERTUMBUHAN BIBIT OKULASI JERUK (Citrus sp) VARIETAS KEPROK TEJAKULA
Authors: Purba Jhon Hardy , Wahyuni Putu Sri , Suarnaya I Gede
Published: February 2020

Tujuan penelitian ini adalah untuk mengetahui pengaruh posisi buku sumber mata tempel dan konsentrasi Atonik terhadap pertumbuhan bibit okulasi jeruk varietas keprok Tejakula. Penelitian ini dilaksanakan di Balai Benih Utama Hortikultura Desa Sukasada, Kecamatan Sukasada, Kabupaten Buleleng, dengan ketinggian + 100 m di atas permukaan laut, dari bulan Agustus sampai September 2017. Rancangan percobaan menggunakan rancangan acak kelompok (RAK) yang tersusun secara faktorial yang terdiri atas 2 faktor yaitu faktor pertama adalah posisi buku sumber mata tempel (P) dengan 3 taraf yaitu bagian ujung ranting sumber mata tempel (Pu); bagian tengah ranting sumber mata tempel (Pt); dan bagian pangkal ranting sumber mata tempel (Pp). Faktor kedua adalah konsentrasi Atonik (A) dengan 4 taraf, yaitu tanpa perlakuan Atonik (kontrol) (A0); Atonik 0.25 ml.l-1 larutan (A1); Atonik 0,50 ml.l-1 larutan (A2); dan Atonik 0,75 ml.l-1 larutan (A3). Hasil analisis ragam menunjukkan posisi buku sumber mata tempel hanya berpengaruh nyata (p<0,05) terhadap panjang tunas batang atas. Perlakuan konsentrasi Atonik berpengaruh sangat nyata (p<0,01) terhadap persentase okulasi hidup, umur mulai muncul tunas batang atas, panjang tunas batang atas, jumlah daun batang atas, dan diameter tunas batang atas. Pemberian konsentrasi Atonik berpengaruh nyata (p<0,05) terhadap jumlah daun, berat kering oven daun batang atas, dan berat kering oven tunas batang atas. Hubungan antara konsentrasi Atonik (X) dan berat kering oven tunas batang atas per tanaman (Ŷ) menunjukkan hubungan kuadratik dengan persamaan, yaitu Ŷ= -2,6667x2+ 2,48x + 1,8978 dengan koefisien determinasi (R2) = 0,8787; sehingga Xopt = 0,46 ml.l-1 Larutan dan Ŷmax = 2,47 g. Kombinasi perlakuan posisi buku sumber mata tempel dengan konsentrasi Atonik berpengaruh tidak nyata terhadap semua variabel yang diamati.
PENGARUH VARIETAS DAN KEPADATAN TANAM TERHADAP PERTUMBUHAN DAN HASIL PADI (Oryza sativa L.) PADA LAHAN SAWAH DI ANTURAN
Authors: Wahyuni Putu Sri , Srilaba Nyoman , Rumtily Emy Alberthina
Published: February 2020

Tujuan dari penelitian ini adalah untuk mengetahui pengaruh beberapa varietas padi sawah, pengaruh kepadatan tanam dan interaksinya terhadap pertumbuhan dan hasil produksi padi. Penelitian ini telah dilaksanakan pada bulan September – Desember 2011 di lahan sawah Subak Anturan, Desa Anturan, Kecamatan Buleleng pada ketinggian tempat ± 3m dari atas permukaan laut. Penelitian ini menggunakan rancangan petak terpisah (split plot desgn) dengan dasar rancangan acak kelompok (RAK) yang terdiri dari dua faktor. Faktor utama adalah faktor varietas yang terdiri dari tiga faktor yaitu varietas Ciherang, varietas Inpari 3 dan varietas Inpari 10. Faktor tambahan adalah faktor cara tanam legowo terdiri dari empat taraf yaitu cara tanam tegel 20 x 20 cm populasi 250.000 per hektar, cara tanam legowo 2:1 populasi 166.660 per hektar, cara tanam legowo 2:1 populasi 250.000 per hektar, dan cara tanam legowo 2:1 populasi 333.333 per hektar. Kedua faktor ini dikombinasikan sehingga terdapat 12 perlakuan kombinasi. Masing-masing perlakuan kombinasi diulang tiga kali, sehingga berjumlah 36 unit perlakuan. Pengaruh jenis varietas padi menunjukkan bahwa Varietas Ciherang cenderung memberikan hasil gabah kadar air 14% per hektar lebih berat, yaitu 6,81 ton. Pada varietas Inpari 10 dan Inpari 3 memberikan hasil gabah kadar air 14% per hektar, yaitu 6,16 ton dan 6,17 ton atau lebih rendah 9,54% dan 6,17% dibandingkan dengan hasil pada Varietas Ciherang. Tanam jajar legowo 2:1 dengan populasi 333.333 rumpun per hektar nyata memberikan hasil gabah kadar air 14% per hektar yang lebih berat, yaitu 7,11 ton, atau nyata lebih berat 7,24% dibandingkan dengan hasil gabah kadar air 14% per hektar yang dicapai pada populasi 250.000 rumpun per hektar tanam tegel. Interaksi antara jenis vatietas padi dan kepadatan tanam berpengaruh tidak nyata terhadap semua variabel yang diamati.
PENGARUH DOSIS PUPUK ORGANIK CAIR DAN NITROGEN TERHADAP PERTUMBUHAN DAN HASIL JAGUNG MANIS (Zea mays-saccharata Sturt) PADA LAHAN KERING DI DESA TELAGA
Authors: Suarsana Made , Wahyuni Putu Sri , Maliastra Made
Published: February 2020

Tujuan penelitian ini adalah untuk mengetahui pengaruh pemberian dosis pupuk organik cair/POC, dosis pupuk nitrogen yang paling tepat, dan interaksinya terhadap pertumbuhan dan produksi jagung manis. Penelitian ini telah dilaksanakan pada bulan September-November 2018 di Desa Telaga, Kecamatan Busungbiu Kabupaten Buleleng dengan ketinggian tempat ± 500 meter dari atas  permukaan laut.  Rancangan yang digunakan adalah Rancangan Acak Kelompok Faktorial (RAKF) dengan dua faktor. Faktor  pertama: pemberian POC Plus (Pomi kuning) dengan tiga tingkatan, yaitu  tanpa  POC, Pemberian POC dosis 25 l/ha, dan POC dosis 50 l/ha.  Faktor  ke dua yaitu pemberian pupuk nitrogen dengan tiga tingkatan, yaitu tanpa pemberian nitrogen, pemberian nitrogen  sebanyak  69 kg/ha, 138 kg/ha, dan 207 kg/ha. Pemberian POC berpengaruh sangat nyata terhadap hasil segar tongkol/ha. Penggunaan POC pada dosis 25 l/ha memberikan hasil segar tongkol/ha tertinggi, yaitu 27,83 ton.  Hasil analisis regresi hubungan antara dosis POC  (x) dengan hasil segar tongkol per hektar (ŷ)  menunjukkan hubungan kuadratik, yaitu ŷ = 24,25 + 0,28x – 0,006x2 dengan R2 = 89,80%. Pemberian nitrogen berpengaruh sangat nyata terhadap hasil segar tongkol per hektar. Pemberian nitrogen pada dosis 138 kg/ha memberikan hasil segar tongkol per hektar tertingi, yaitu 28,30 ton. Hasil analisis regresi hubungan antara dosis nitrogen (x) dengan hasil tongkol per hektar (ŷ) menunjukkan hubungan kuadratik, yaitu   ŷ = 20,663 + 0,0087x – 0,0003x2 dengan R2 = 88,28%. Interaksi antara pemberian POC dan nitrogen  berpengaruh nyata terhadap hasil segar tongkol/ha. Penggunaan kombinasi POC dosis 25 l/ha dan nitrogen pada dosis 138 kg/ha memberikan hasil segar tongkol/ha tertinggi, yaitu 29,61 ton.
DIRECT AND INDIRECT EFFECTS OF OPERANT RESOURCES ON CO-CREATION EXPERIENCE: EMPIRICAL EVIDENCE FROM AIRBNB CONSUMERS
Authors: Hastari Revi , Adela Zehan , Alkhair Hanesman , Wibowo Alexander Joseph Ibnu
Published: February 2020

This study aims to empirically analyze the direct and indirect effects of operant resources on co-creation experience of Airbnb consumers. Specifically, this study examines operant resources’ impact on perceived benefits, trust, and co-creation experience. In addition, this study also investigates the effect of perceived benefits, and trust on co-creation experience. We managed to collect a sample of 201 respondents obtained through online surveys. Respondents were consumers who have used Airbnb service offerings. Data were gathered using a questionnaire developed on the basis of a literature review. A convenience sampling was adopted in inviting consumers to participate in this study. The hypotheses were analyzed using simple and multiple linear regression analysis. The results show that operant resources are proven to influence perceived benefits, and trust of consumers. Likewise, perceived benefits, trust, and operant resources have been shown to influence the co-creation experience. The novelty and the most important contribution of this study are that it has succeeded in proving empirically the existence of the Service-Dominant Logic (S-D Logic) perspective.
Optimization of Production Process of Frangible Bullets Based on Bismuth Powder
Authors: Do V. , Bui X. , Komenda J. , Vítek R. , Skalický P.
Published: February 2020

The article deals with the pressing process of the samples from bismuth powder, which were used in place of the bullet in order to optimize the frangible bullets manufacturing process. Cylindrical samples with a diameter of 9 mm were compacted by cold pressing in a cylindrical rigid die without sintering. Various pressing conditions (the changing of pressing force, pressing velocity and dwell time) were applied for compacting the samples. After compaction, the axial strength of the samples was tested to determine the optimal manufacturing process of the frangible bullet based on the bismuth powders.
Quantification of Command and Control Approaches - Model Based Evaluation
Authors: Hodický J. , Procházka D. , Stodola P. , Drozd J.
Published: February 2020

The Post-Information Age brings new challenges into the military operational environment. The current approach of the extreme hierarchical command and control cannot be sustained in this complex and dynamic environment. Thus, making the search for new command and control approaches is a critical activity. The description and classification of command and control approaches is expressed in a very abstract way. The article describes a unique, quantification technique of command and control approaches. The quantification is demonstrated by Use Case with self-synchronization as the selected command and control approach. In the Use Case, the deterministic dynamic model is implemented. The results achieved from the model demonstrate a variance of a single parameter, on which the quality of the selected Command and Control approach in the given operational scenario quantifies.
Autenticação de azeites de oliva extra virgem com diferentes níveis de acidez através de espectroscopia UV-Vis e PLS-DA
Authors: Alves Francieli Cassia Gomes Barroso Simão , Março Paulo Henrique , Valderrama Patricia
Published: February 2020

Neste estudo foi desenvolvida uma metodologia para autenticação de azeites de oliva extra virgem com diferentes níveis de acidez através da espectroscopia na região do Ultravioleta e Visível (UV-Vis) acoplada ao método de Mínimos Quadrados Parciais com Análise Discriminante (PLS-DA). A sensibilidade do modelo foi igual a 1.0. Com base nesse resultado, o modelo foi capaz de classificar corretamente todas as amostras de azeite de oliva de acordo com seus diferentes níveis de acidez. A especificidade também apresentou resultado igual a 1.0, o que significa que nenhuma amostra foi classificada de forma errônea em uma outra classe. A habilidade da espectroscopia UV-Vis na autenticação dos azeites de oliva extra virgem baseado em seus diferentes níveis de acidez pode ser atribuída aos deslocamentos hipocrômico e hipercrômico, devido às absorções entre 250 – 510 nm e 670 nm, que são características de carotenos e clorofilas.
Influência do método de extração de café no perfil químico e atividade antioxidante “in vitro” e “in vivo” nas bebidas
Authors: Rabelo Daniel Mansur , Henriques Bárbara Oliveira , Castilho Rachel Oliveira , Labanca Renata Adriana
Published: February 2020

O café, fruto do cafeeiro (gênero Coffea), contém sementes, que quando torradas e moídas, geram uma das bebidas mais consumidas do mundo. Ao consumo do café são atribuídos muitos benefícios à saúde, a maioria deles ligados às suas propriedades antioxidantes. Os componentes do café ligados a essa atividade são, principalmente, os polifenóis, a cafeína e as melanoidinas. Vários fatores como o tipo de cultivo, a espécie utilizada, o grau de torração e o modo de preparo da bebida exercem influência sobre a composição química e atividade biológica do café. Para o preparo, geralmente utiliza-se infusão seguida de filtração, decocção sem filtração ou pressão, utilizando-se máquinas de café expresso. A ação antioxidante consiste basicamente em reverter o processo de estresse oxidativo, que ocorre quando mais radicais livres são gerados que eliminados do organismo. Assim, esse trabalho objetivou avaliar a atividade antioxidante in vitro e in vivo de bebidas de café obtidas a partir de diferentes tipos de extração. Para isso, foram preparadas a partir de uma mesma amostra de café torrado e moído bebidas a 10 g/L nas formas de filtrado (infusão), fervido (decocção) e expresso (pressão) e foram realizados testes de atividade antioxidante in vitro (DPPH e ABTS) e in vivo, utilizando-se animais sadios submetidos a uma dosagem diária da bebida equivalente a 350 mL para um adulto de 70 Kg, em cujos fígados foram determinadas as atividades das enzimas catalase e glutationa redutase e a medida da peroxidação por TBARS, além da determinação de alguns parâmetros bioquímicos no sangue. Nos ensaios in vitro, o café fervido obteve menor atividade que os demais, sendo que o filtrado apresentou a maior atividade no ensaio de DPPH e o expresso no ensaio de ABTS. Com relação aos parâmetros bioquímicos, houve diferenças significativas apenas para a glicemia, que foi maior nos animais controle que nos tratamentos. Como havia atividade antioxidante in vitro atribuída ao café e há atividade antioxidante in vivo atribuída ao café em outros estudos, suspeita-se que o tempo de exposição pode ter sido insuficiente ou poderia ser induzido estresse oxidativo nos animais, a fim de obter uma melhor resposta. Portanto, estudos adicionais podem ser realizados para confirmar os resultados obtidos neste trabalho.
Termoestabilidade de bacteriocinas produzidas por Enterococcus sp.
Authors: Maia Luciana Furlaneto , Costa Larissa Cristina , Rocha Katia Real , Terra Márcia Regina , Furlaneto Marcia Cristina
Published: February 2020

Bacteriocina produzidas por diversas espécies de Enterococcus (enterocinas) tem mostrado potencial atividade antagônica contra diversos patógenos além de termoestabilidade. Neste trabalho avaliamos duas enterocinas já caracterizadas produzidas por Enterococcus faecium- Efm20 and Enterococcus sp-Ent22. A produção de enterocina foi realizada inoculando os isolados em caldo MRS suplementado com  glicose (20,0 g/L), tween20  (5,0 g/L) e lactose (30,0), seguida de incubação por 24 h a 37°C. Posteriormente, o CFS foi obtido centrifugando a cultura a 10.000 rpm  por 15 minutos e filtrado em membrana Millipore. O CFS foi aquecido a 60°C, 80°C e 100°C por 30 minutos, e  121°C por 15 minutos. A atividade inibitória contra Listeria innocua foi realizada pela técnica do spot on law. A atividade inibitória não foi substancialmente  afetada pela temperatura, demonstrando assim o potencial de aplicação desta enterocina na indústria de alimentos.
Caracterização higiênico-sanitária e microbiológica de estabelecimentos que comercializam açaí (Euterpe oleracea Mart.) em Igarapé-Miri, Pará
Authors: Nascimento Neto Antônio Fernandes do , Vasconcelos Cássio Eluan Cunha , Figueiredo Elaine Lopes
Published: February 2020

O açaí faz parte da cultura da região Norte e vem ganhando cada vez mais destaque no cenário nacional e internacional pelas suas características sensoriais, elevado valor nutricional e por auxiliar na prevenção de doenças. Em contrapartida, o fruto está susceptível a muitos micro-organismos e o seu processamento em polpa requer cuidados higiênicos para a qualidade microbiológica. Assim este trabalho tem como objetivo fazer a caracterização higiênico-sanitária e microbiológica de três estabelecimentos produtores e comercializadores de polpas de açaí, localizados no município de Igarapé-Miri, Pará. Aplicou-se a Lista de Verificação de Boas Práticas de Fabricação – BPF para o diagnóstico higiênico-sanitário dos estabelecimentos. Foram realizadas análises microbiológicas nas amostras de polpas de açaí (Coliformes Totais e Termotolerantes, e pesquisa de Salmonella spp) e de “swabs” de três superfícies (mão de manipulador, batedeira e bancada) em cada um dos estabelecimentos avaliados (Coliformes Totais e Termotolerantes, contagem de Staphylococcus aureus e contagem padrão de bactérias aeróbias mesófilas). Os resultados da Lista de Verificação de BPF mostrou que o estabelecimento E1 foi o que apresentou as maiores percentagens de adequações higiênico-sanitárias e o estabelecimento E2 apresentou as menores percentagens de adequações. Os resultados microbiológicos indicaram a presença de Coliformes Totais em todas as amostras e de Coliformes Termotolerantes em dois estabelecimentos, mas com valores permitidos pela legislação vigente. Detectou-se a presença de Coliformes Totais, bactérias aeróbias mesófilas e Staphylococcus aureus em todas as superfícies avaliadas, evidenciando assim falhas higiênico-sanitárias durante o processamento da polpa.Palavras-Chaves: Açaí, qualidade, higiene.
Caracterização fenotípica do perfil de resistência a antimicrobianos em cepas de Escherichia coli isoladas de carne moída em feiras livres da região do Alto Oeste Potiguar, Rio Grande do Norte
Authors: Freitas Francisco Bruno Ferreira de , Machado Adalva Lopes
Published: February 2020

A carne moída é um produto bastante comercializado em ambientes com condições higiênico-sanitárias precárias como as feiras livres, podendo assim ser contaminado por diferentes patógenos. Tais micro-organismos podem apresentar características de resistência a antimicrobianos, gerando um problema de saúde pública. Dentre os principais causadores das contaminações da carne moída, a Escherichia coli é a espécie predominante. O objetivo desse trabalho foi realizar a caracterização fenotípica de cepas isoladas de carne moída do município de Pau dos Ferros, e conhecer o perfil de resistência a antimicrobianos dos isolados de Escherichia coli. Foram analisadas 24 cepas de bactérias não identificadas, a partir dessas cepas foram realizados, provas bioquímicas, provas morfológicas índice ARI, índice MAR e antibiograma. Das 24 cepas, 54,2% foram confirmadas como E.coli. Foi verificado que 23,07% das cepas foram resistentes a todos os antimicrobianos, as estirpes testadas se mostraram mais resistentes a cefalotina, com 53,84% de resistência. Em relação ao perfil de multirresistência, das 13 cepas analisadas (30,77%) apresentaram índice MAR variando de 66,6 a 100. Para o índice ARI os valores observados foram de 0,025 a 0,076. Com relação à resistência antimicrobiana, todos os isolados apresentaram resistência a pelo menos um antimicrobiano testado. Todos os resultados encontrados são preocupantes, pois os três antimicrobianos testados são utilizados frequentemente pela população em geral, percebemos que esses medicamentos em várias ocasiões se mostraram ineficazes para a população de E.coli.
Verificação do teor de sódio e de gordura trans descritos na informação nutricional de manteigas, margarinas e requeijões cremosos industrializados comercializados no município de Aracaju, Sergipe
Authors: Machado Wesney , Cerqueira Emanuele , Serio Juliana , Gonçalves Cleber
Published: February 2020

A manteiga, margarina e o requeijão cremoso são produtos alimentícios que estão inseridos na dieta da população brasileira e que também são usados como ingredientes na elaboração de alimentos industrializados e de preparações caseiras. Diante disso, o presente estudo teve como objetivo avaliar qualitativamente, conforme a legislação brasileira vigente, os teores de sódio e de gordura trans contidos na informação nutricional de manteigas, margarinas e requeijões cremosos industrializados comercializados no município de Aracaju, Sergipe. Foram analisadas 42 amostras, onde 38 amostras (90,5%) estavam com os teores de sódio acima do limite estabelecido pela legislação (maior ou igual a 400 mg), com valores que variaram entre 433 a 1500 mg.100g-1, sendo então classificados como elevados.  Dez amostras (23,8%) apresentaram teores de gorduras trans acima do permitido (maior ou igual a 0,6 g), com valores que variaram de 1 g a 20 g.100g-1, sendo então classificados como elevados. Ainda três marcas, M4, M5 e M9, apresentaram porções de referência em desacordo ao que determina a lei brasileira. Há necessidade, portanto, de adequação à legislação e ajustes na tecnologia de produção da maioria dos produtos alimentícios analisados nesta pesquisa, visando a diminuição dos teores de sódio e a eliminação do uso de gorduras trans na formulação dos alimentos produzidos.
Analises físico-químicas em linguiças coloniais produzidas no município de Palmas, Paraná
Authors: Jardim Apoliana Rosa , Lima Kely Priscila de
Published: February 2020

O Brasil é um grande produtor de carne suína, sendo que boa parte desta produção é destinada a elaboração de embutidos. Portanto, o objetivo foi avaliar os teores em comparação com a legislação de linguiças tipo colonial produzidos no município de Palmas, Paraná. Foram analisados os parâmetros de nitrito, pH, umidade, lipídios e colesterol de 3 marcas. O teor de nitrito e o pH foram analisados 5, 10, 25 e 35 dias após a fabricação, a marca B apresentou o menor teor de nitrito 12,16 mg.Kg-1, enquanto as marcas A e C apresentaram valores de 48,2 mg.Kg-1 e 44,66 mg.Kg-1 respectivamente, os quais não diferiram estatisticamente (p menor que 0,05) na primeira quantificação, em relação a este parâmetro todas as marcas encontram-se dentro da legislação vigente. O pH das marcas apresentou um aumento, a marca A de 5,02 para 5,19, B de 5,55 para 6,15 e a C de 4,99 para 5,38, tais valores encontram-se acima do ideal em relação à segurança dos alimentos. Quanto aos demais parâmetros, os valores de umidade estavam de acordo com a legislação. Os teores de lipídios, as marcas B e C apresentaram 51,66% e 49,63% respectivamente, portanto esses valores ultrapassam a legislação e o informado no rótulo. O teor colesterol também apresentou valores elevados sendo para a marca A 1593,3 mg.Kg-1, para B 1903,3 mg.Kg-1 e para C 1943,3 mg.Kg-1. Desta maneira é possível observar que o produto pode estar sendo adulterado pela adição excessiva de toucinho.
Análise microbiológica de alimentos comercializados em quiosques da praia de Ponta Negra, Natal, Rio Grande do Norte
Authors: De Almeida Isa Heloísa , Da Costa Larissa Ramalho , Nóbrega Dantas Amanda Thayse , Aragão de Araújo Leonardo Bruno
Published: February 2020

A alimentação na praia, não é vista apenas como uma forma de suprir uma necessidade do indivíduo, mas também como uma atração turística. No entanto, é importante que essa alimentação não represente risco à saúde do consumidor e para isso é essencial que atenda aos requisitos de higiene e boas práticas de manipulação. O presente estudo teve como objetivo realizar análise microbiológica de alimentos comercializados em quiosques da praia de Ponta Negra, Natal, Rio Grande do Norte. A coleta das amostras foi realizada entre os meses de setembro e outubro de 2017, em 13 dos 28 quiosques existentes, os quais foram escolhidos aleatoriamente.  Os alimentos escolhidos foram 4 amostras de cada um dos seguintes pratos: macaxeira frita, iscas de peixe frito, arroz cozido, água de coco in natura e suco de cajá. Foram realizados testes microbiológicos para coliformes totais e termotolerantes, Estafilococos aureus e Salmonella spp. Das pesquisas realizadas obteve-se resultados satisfatórios para as amostras de iscas de peixe frito, macaxeira frita e suco de cajá, porém para as amostras de arroz cozido obteve-se o maior número de crescimento de microrganismos, em 75% das amostras de água de coco in natura houve o crescimento de coliformes totais e termotolerantes. Em nenhuma das amostras analisadas foi verificada a presença de Samonella spp. Ter hábitos saudáveis de higiene, implantar, praticar formas seguras de manipular alimentos e qualificar a mão de obra são meios de fornecer uma alimentação segura para aqueles que frequentam os quiosques da praia de Ponta Negra.
Photoelectrocatalytic Degradation of C.I. Basic Blue 9 under UV Light Using Silver-Doped Titanium Dioxide Nanotubes
Authors: Lopez Edgar Clyde R. , Cleofe Vince Aron F. , Cañal Rio Ysabel A. , Boado Kristoffer Francis P. , Perez Jem Valerie D.
Published: February 2020

Titanium dioxide is a widely-investigated semiconductor photocatalyst due to its wide availability and low cost. Although it has been successfully used in the photocatalytic treatment of various organics in wastewater, it remains a challenge to modify its structure to achieve enhanced catalytic properties at a wider light spectrum. Doping with transition metals was seen to narrow its optical band gap yet synthesis routes have been largely limited to the use of high-end equipment. Herein we demonstrate the use of a simpler one-pot approach to synthesize nanoporous arrays of silver-doped titanium dioxide nanotubes (Ag-TiNTs) by double anodization of titanium sheets. The synthesized Ag-TiNTs have an average inner diameter of 58.68 nm and a wall thickness of 16.46 nm. ATR-FTIR spectroscopy revealed its characteristic peaks attributed to O-Ti-O bonds. Silver doping increased the lattice volume and crystallite size of anatase with a corresponding decrease in the degree of crystallinity due to the introduction of impurity Ag atoms in its tetragonal structure. Silver was homogeneously distributed across the nanotube surface at an average loading of 1.41 at. %. The synthesized Ag-TiNTs were shown to have a superior photoelectrocatalytic activity in degrading C.I. Basic Blue 9 under UV illumination with a pseudo-first-order kinetic rate of 1.0253 x 10-2 min-1. Most importantly, the Ag-TiNTs are photoelectrocatalytically-active even at a low Ag loading.
An Explicit, Accurate Approach Toward Modeling Irrecoverable Deformation Effects of Shape Memory Alloys
Authors: Zhan Lin , Wang Si Yu , Xi Hui Feng , Xiao Heng
Published: February 2020

Finite strain plastic deformation effects of SMAs are simulated based on finite strain elastoplastic J2-flow equations, in a direct sense with no reference to any additional variables for phase transition mechanisms. Uniaxial loading-unloading curves of any given shape may be exactly reproduced as uniaxial stress-strain responses of these equations in each loading-unloading cycle. A new technique for combining linear spline functions into a unified, smooth interpolating function is proposed toward the purpose of explicitly, accurately fitting any given test data for both loading and unloading cases.
A case report of a high division of Extensor digitorum longus
Authors: Eshwara J. M. , Kosgallana E. W. , Dissanayake J. K.
Published: February 2020

No abstract available
Morphometric evaluation of the foramen magnum in a Sri Lankan population
Authors: Peiris R. , Vadysinghe A. , Nanayakkara D.
Published: February 2020

Objective: The foramen magnum (FM) that transmits a large number of vital structures is an important anatomical landmark in neurosurgical procedures and forensic anthropology. The aim of the present study was to determine the dimensions and shape of the FM in a Sri Lankan population. Material and method: Forty-four adult skulls (32 males and 12 females) were selected for the study. Sagittal (FMSD) and transverse (FMTD) diameters of the FM were taken using a sliding digital vernier caliper to the nearest 0.01mm by one investigator. The area of the FM was calculated using Radinsky's formula; A=1/4 X 3.14 X FMTD X FMSD and FM index was calculated using the formula: FMTD x 100 / FMSD. The skulls were visually assessed to determine the shape of the FM. The shape of the FM was recorded as round, oval, egg-shaped, tetragonal, pentagonal, hexagonal or irregular. Results: The mean sagittal and transverse diameter, area and index of the foramen magnum in males were 34.62 ±2.17 mm, 29.52±2.13 mm, 695.77±90.64 mm2 and 85.41±5.66, respectively, whereas they were 33.87±2.31 mm, 28.28±1.99 mm, 662.56±98.67 mm2 and 83.69±6.13, respectively, in females. The shape of the foramen was found to be eggshaped in 34.1%, and round in 27.2% of the cases. Conclusions: The size and shape of the foramen magnum are highly variable among different world populations. Sri Lankan skulls showed smaller foramen magnum in compare with those of African, Mediterranean and European populations. Males displayed larger mean values than females for all measured variables.
A brief history of neuroscience
Authors: Mathangasinghe Y. , Samaranayake U. M. J. E.
Published: February 2020

No abstract available
Cadaveric study of variations of origin of lateral circumflex and medial circumflex artery in a Sri Lankan population
Authors: Dassanayake D. M. T. D. , Chrishan A. N. , Dissanayake J. K.
Published: February 2020

No abstract available
Determination of sex using the humerus in a contemporary Sri Lankan population
Authors: Dissanayake J. K. , Kodikara K. A. S. , Peiris H. R. D. , Ranasinghe D. J. , Abeywardhana U. N. Y. , Chandrasiri D. A. C. T. , Nawarathna L. S. , Nanayakkara C. D.
Published: February 2020

No abstract available
Morphometric analysis of the foramen magnum in a sample of adult Sri Lankan skulls
Authors: Fernando R. C. U. , Ihalagedara D. D. , Vadysinghe A. , Peiris H. R. D. , Nanayakkara C. D.
Published: February 2020

No abstract available
Comparison of neck Range of Motion (ROM) and neck lordosis angle between spectacle users and non-spectacle users among first year undergraduates of the University of Peradeniya
Authors: Kumarasiri K. G. S. I. , Jayasundara B. P. , Kalahagahawaththa K. W. D. P. , Lisana M. M. F. , Wijesinghe N. P. , Karunathilaka K. G. L. R. A. D. , Senarath M. K. I. D. , Sominanda A.
Published: February 2020

No abstract available
Learning style preferences among second year medical students in Rajarata University of Sri Lanka
Authors: Vijithananda H. H. T. S. M. , Senarath D. M. K. N. , Perera H. T. C. , Dharmarathne K. N. D. , Abeyrathne I. A. N. P. , Adikari S. B. , Paththinige C. S. , Jayawardana S. M. A.
Published: February 2020

No abstract available
A study on student perception on a formative 'mini-viva' examination in Anatomy
Authors: Ilangarathne I. P. S. D. , Dissanayake C. S. , Rodrigo P. W. D. C. H. , De Silva C. L. , Koralegedara K. I. S. , Jayawardana S. M. A. , Paththinige C. S.
Published: February 2020

No abstract available
Anatomical variations of the obturator artery in a group of Sri Lankan subjects: A cadaveric study
Authors: Samarawickrama M. B. , Rodrigo P. M. , Nanayakkara P. G. C. L. , Chamara A. G. D. , Tharaka N. G. S. , Karunadasa T. H. A. S.
Published: February 2020

No abstract available
Anatomical variations of the sciatic nerve: a descriptive study
Authors: Chandrasiri D. A. C. T. , Patabandige D. J. , Ekanayaka E. A. D. A. , Dissanayaka J. K.
Published: February 2020

No abstract available
Anatomical landmarks for the intercostal nerve blocks: a cross sectional cadaveric study
Authors: Mathangasinghe Y. , Samaranayake U. M. J. E. , Wijayasinghe R. , Manchanayake M. , Seneviratne P. D. , Dassanayake V. E. G.
Published: February 2020

No abstract available
Location and number of nutrient foramina in human long bones of a Sri Lankan sample
Authors: Subasinghe S. A. J. S. , Weerasooriya W. W. R. W. M. P. K. , Fernando R. C. U. , Ekanayake E. M. S. D. , Jayaweera A. S. , Nawarathna N. G. S. , Sampath P. H. , Manawarathne M. R. K. , Banneheka B. M. H. S. K. , Peiris H. R. D.
Published: February 2020

No abstract available
Diaphragmatic hernia presenting in adult life
Authors: Peiris S. P. M. , Amaratunga H. A. , Seneviratne R. J. K. , Lamawanse M. D.
Published: February 2020

No abstract available
Morphological variations of human adult spleens: a cadaveric study
Authors: Kiritharan A. , Samaranayake U. M. J. E. , Anthony D. J.
Published: February 2020

No abstract available
A study of variations in the origin of Profunda femoris artery
Authors: Chrishan A. N. , Dassanayake D. M. T. D. , Abeywardhana U. N. Y. , Dissanayake J. K.
Published: February 2020

No abstract available
Anatomical variations of terminal branching pattern of the brachial artery
Authors: Abeywardhana U. N. Y. , Wahalawatte Y. R. , Dissanayake J. K. , Amaratunga H. A.
Published: February 2020

No abstract available
Variations of the human retinal vascular patterns: a descriptive crosssectional study in Sri Lanka
Authors: Sanjayan A. , Ruwanpathirana P. S. , Dissanayake M. M.
Published: February 2020

No abstract available
A variation in the course of sciatic nerve in relation to the piriformis muscle: a case report
Authors: Chandrasiri D. A. C. T. , Patabandige D. J. , Ekanayaka E. A. D. A. , Dissanayaka J. K.
Published: February 2020

No abstract available
A cadaveric study of the variations in pulmonary fissures
Authors: Ekanayaka E. A. D. A. , Chrishan A. N. , Dassanayake D. M. T. D. , Dissanayake J. K.
Published: February 2020

No abstract available
A preliminary study of morphological and morphometric variations of internal iliac artery in a group of Sri Lankan subjects: A cadaveric study
Authors: Samarawickrama M. B. , Rodrigo P. M. , Ranasinghe D. S. , Wickramasuriya P. , Wijesekara K. B.
Published: February 2020

No abstract available
Oxygen-ozone therapy: an extra weapon for the general practitioners and their patients
Authors: Allorto Nicolò
Published: February 2020

Oxygen-ozone therapy is a medical practice validated in the literature by numerous international clinical studies. It has indications in many diseases and complications, alone or in combination with conventional therapies. In this work, a number of international clinical studies have been evaluated and those most relevant to pathologies of daily interest to the general practitioner (GP) have been selected to assess their cost/benefit ratio. It has been concluded that GPs and their patients can derive significant benefits from this medical practice, and GPs are ideally placed to assess which patients should receive this treatment.
Association of oxygen-ozone therapy with high-power photodynamic therapy: a new protocol for the treatment of periodontopathies
Authors: Pulga Antonello
Published: February 2020

In this study, we want to demonstrate that oxygen-ozone therapy together with laser therapy (high-power photodynamic therapy) leads to substantial and rapid benefits for periodontopathic patients.
Table of Contents Vol 24 (2019)
Authors: Office Editorial
Published: February 2020

No abstract available.
Investigating the comprehension iceberg: Developing empirical benchmarks for early-grade reading in agglutinating African languages
Authors: Spaull Nicholas , Pretorius Elizabeth , Mohohlwane Nompumelelo
Published: February 2020

Background: Reading development in agglutinating African languages is a relatively under-researched area. While numerous studies highlight the low comprehension levels among learners reading in African languages in South Africa, little has been done to probe beneath this ‘comprehension iceberg’ in terms of decoding skills.Aim: As a tentative step towards benchmarking in African languages, we analyse the sub-components of reading across three languages (Northern Sotho, Xitsonga and isiZulu), to better understand the nature of alphabetic knowledge, word reading and fluency in these languages, how these relate to one another, and how accuracy and speed relate to comprehension.Setting: Data was obtained from 785 Grade 3 learners across three African languages in three provinces in South Africa.Methods: The early grade reading assessment (EGRA) framework was adapted to the written features of the three languages to assess letter-sounds, single-word reading, non-word reading, oral reading fluency (ORF) and oral comprehension.Results: We present results on fluency, accuracy and comprehension and their interrelationships in these morphologically rich languages. While differences emerged between the conjunctive and disjunctive orthographies, strong relations occurred across the languages between letter-sound knowledge and word reading, word reading and oral reading fluency, and ORF and reading comprehension. Results suggest minimum thresholds of accuracy and ORF in each language, below which it is virtually impossible to read for meaning.Conclusion: There is a strong need for language-specific norms and benchmarks for African languages. Preliminary minimum decoding thresholds for comprehension found in these three languages serve as a move in that direction.
Mistaken Identity for Gastric Carcinoma
Authors: Koul Ajaz Nabi , Rather Aadil Rafeeq
Published: February 2020

Isolated gastric tuberculosis, without evidence of pulmonary or other gastrointestinal involvement, is extremely rare. Due to inaccurate clinical diagnoses, most patients end up requiring surgical intervention,only after which is gastric tuberculosis diagnosed. we present a case where this dilemma between tuberculosis and malignancy costed the patient half of his stomach.
Growth, relations and prime spectrum of monomial algebras
Authors: Greenfeld Be'eri
Published: February 2020

We show that monomial algebras defined by

r_n

relations of each degree can (under mild assumptions) be mapped onto prime monomial algebras with prescribed growth functions tightly bounded by any function growing slower than

r_n

.

Using the same method, we are able to construct finitely generated, prime monomial algebras with GK-dimension 2 admitting arbitrarily long chains of prime ideals, providing an answer to a question of Bergman from 1989. Unlike the previously known examples, our algebras are computable, concretely constructed and concrete upper bounds of the form

n^2f(n)

can be put on their growth rates, for arbitrarily slow unbounded non-decreasing function

f

.
The Klein–Gordon equation, the Hilbert transform, and dynamics of Gauss-type maps
Authors: Hedenmalm Haakan , Montes-Rodríguez Alfonso
Published: February 2020

We study the uncertainty principle associated with the Klein–Gordon equation. As in the previous work [Ann. of Math. 173 (2011)], we consider vanishing along a lattice-cross. The following variants appear naturally: (1) vanishing only along “half” of the lattice-cross, where the “half” is defined as being on the boundary of a quarter-plane, and (2) that the function vanishes on the whole lattice-cross, but we require the function to have Fourier transform supported by one of the two branches of the hyperbola. In case (1) the critical phenomenon is whether the given condition forces the function to vanish on the quarter-plane in question. Here it turns out to be crucial whether the quarter-plane is space-like or time-like, and in short the answer is yes for space-like and no for time-like. The analysis brings us quite far, involving the orbit of the Hilbert kernel under the iterates of the transfer operator, and uses methods from the theory of totally positive matrices as well as Hurwitz zeta functions, and is partially postponed to a separate publication. In case (2), the critical phenomenon occurs at another density, and the dynamics then comes from the standard Gauss transformation

t \mapsto 1/t \: \mathrm {mod} \: \mathbb Z

on the interval [0, 1]. In the intermediate range of the density of the lattice-cross, we obtain unique extendability of the Fourier transform from one branch of the hyperbola to the other.
Accountants: hou op met dat verwijzen naar het V-woord
Authors: Pheijffer Marcel
Published: February 2020

Er is geen vakgebied waarin het woord verwachtingskloof zo vaak wordt aangehaald als de accountancy. Nu het vooral accountants zijn die het V-woord in de mond nemen en daarnaar verwijzen, mogen hun uitingen kritisch worden beschouwd, waarbij ook de kritiek van verstandige leken, redelijke en geïnformeerde derden en maatman-beleggers mag worden meegenomen. Daaruit blijkt dat deze niet refereren aan het V-woord, maar accountants aanspreken op het bestaan van een prestatiekloof. Het is dan ook die kloof waarop de discussie zich primair zou moeten toespitsen.
Technical note: Intermittent reduction of the stratospheric ozone over northern Europe caused by a storm in the Atlantic Ocean
Authors: Sofiev Mikhail , Kouznetsov Rostislav , Hänninen Risto , Sofieva Viktoria F.
Published: February 2020

Abstract. A 3 d episode of anomalously low ozone
concentrations in the stratosphere over northern Europe occurred on 3–5 November 2018. A reduction of the total ozone column down to ∼ 200–210 Dobson units was predicted by the global forecasts of the System for
Integrated modeLling of Atmospheric coMposition (SILAM) driven by the
weather forecast of the Integrated Forecasting System (IFS) of the European Centre
for Medium-Range Weather Forecasts (ECMWF). The reduction down to 210–215 DU was subsequently observed by satellite instruments, such as the Ozone
Monitoring Instrument (OMI) and Ozone Mapping Profile Suite (OMPS). The
episode was caused by an intrusion of tropospheric air, which was
initially uplifted by a storm in the northern Atlantic, south-east of Greenland.
Subsequent transport towards the east and further uplift over the Scandinavian
ridge of this humid and low-ozone air brought it to ∼25 km
altitude, causing ∼30 % reduction of the ozone layer
thickness over northern Europe. The low-ozone air was further transported
eastwards and diluted over Siberia, so that the ozone concentrations were
restored a few days later. Comparison of the model predictions with OMI,
OMPS, and MLS (Microwave Limb Sounder) satellites demonstrated the high
accuracy of the 5 d forecast of the IFS–SILAM system: the ozone anomaly
was predicted within ∼10 DU accuracy and positioned within a
couple of hundreds of kilometres. This episode showed the importance of the
stratospheric composition dynamics and the possibility of its short-term
forecasting, including such rare events.
Particle number concentrations and size distribution in a polluted megacity: The Delhi Aerosol Supersite study
Authors: Gani Shahzad , Bhandari Sahil , Patel Kanan , Seraj Sarah , Soni Prashant , Arub Zainab , Habib Gazala , Hildebrandt Ruiz Lea , Apte Joshua S.
Published: February 2020

Abstract. The Indian national capital, Delhi, routinely experiences some of the world's highest urban particulate matter concentrations. While fine particulate matter (PM2.5) mass concentrations in Delhi are at least an order of magnitude higher than in many western cities, the particle number (PN) concentrations are not similarly elevated. Here we report on 1.25 years of highly time resolved particle size distributions (PSD) data in the size range of 12–560 nm. We observed that the large number of accumulation mode particles – that constitute most of the PM2.5 mass – also contributed substantially to the PN concentrations. The ultrafine particles (UFP, Dp
Solar radiative forcing of aerosol particles near the Taklimakan desert during the Dust Aerosol Observation-Kashi campaign in Spring 2019
Authors: Li Li , Li Zhengqiang , Chang Wenyuan , Ou Yang , Goloub Philippe , Li Chengzhe , Li Kaitao , Hu Qiaoyun , Wang Jianping , Wendisch Manfred
Published: February 2020

Abstract. The Taklimakan desert is a main and continuous source of Asian dust particles causing a significant direct aerosol solar radiative forcing (ASRF). In order to improve the accuracy of the estimation of dust radiative forcing effects, the Dust Aerosol Observation-Kashi (DAO-K) campaign was carried out near the Taklimakan desert in April 2019. The objective of the campaign is to provide comprehensive parameters such as: dust optical and microphysical properties, vertical distribution and surface albedo, for the calculation of ASRF. The measurements were employed in radiative transfer (RT) simulations and the estimations are improved by considering the actual measured atmospheric profiles and diurnal variations of land surface albedo in addition to reliable aerosol parameters. The RT model estimates the ASRF results in average daily mean cooling effects of −19 W m−2 at the top of atmosphere and −36 W m−2 at the bottom of atmosphere during the DAO-K campaign. The Weather Research and Forecasting model with Chemistry (WRF-Chem) with assimilations of the aerosol optical depth and PM2.5 and PM10 concentrations measurements is prone to overestimate the radiative forcing effects of dust aerosols. The percent difference of daily mean ASRF between the two simulations are greater than 50 % in heavy dust episode. Ground-based observations of downward irradiances have validated that the RT simulations are in good agreement with simultaneous observations, whereas the WRF-Chem estimations exhibit obvious discrepancy with these independent measurements. Data assimilations can partly reduce the discrepancy, but there is still room for improving the WRF-Chem simulation of dust aerosol radiative forcing.
Classification of Lidar Measurements Using Supervised and Unsupervised Machine Learning Methods
Authors: Farhani Ghazal , Sica Robert J. , Daley Mark Joseph
Published: February 2020

Abstract. While it is relatively straightforward to automate the processing of lidar signals, it is more difficult to choose periods of "good" measurements to process. Groups use various ad hoc procedures involving either very simple (e.g. signal-to-noise ratio) or more complex procedures (e.g. Wing et al., 2018) to perform a task which is easy to train humans to perform but is time consuming. Here, we use machine learning techniques to train the machine to sort the measurements before processing. The presented methods is generic and can be applied to most lidars. We test the techniques using measurements from the Purple Crow Lidar (PCL) system located in London, Canada. The PCL has over 200,000 raw scans in Rayleigh and Raman channels available for classification. We classify raw (level-0) lidar measurements as "clear" sky scans with strong lidar returns, "bad" scans, and scans which are significantly influenced by clouds or aerosol loads. We examined different supervised machine learning algorithms including the random forest, the support vector machine, and the gradient boosting trees, all of which can successfully classify scans. The algorithms where trained using about 1500 scans for each PCL channel, selected randomly from different nights of measurements in different years. The success rate of identification, for all the channels is above 95 %. We also used the t-distributed Stochastic Embedding (t-SNE) method, which is an unsupervised algorithm, to cluster our lidar scans. Because the t-SNE is a data driven method in which no labelling of training set is needed, it is an attractive algorithm to find anomalies in lidar scans. The method has been tested on several nights of measurements from the PCL measurements.The t-SNE can successfully cluster the PCL data scans into meaningful categories. To demonstrate the use of the technique, we have used the algorithm to identify stratospheric aerosol layers due to wildfires.