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Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 69
Author(s):  
Yeon-Bin Choi ◽  
Naoyoshi Nunotani ◽  
Kunimitsu Morita ◽  
Nobuhito Imanaka

Pt/CeO2-ZrO2-Bi2O3-PbO/SBA-16 (SBA-16: Santa Barbara Amorphous No. 16) catalysts were synthesized to produce hydroxypyruvic acid by glycerol oxidation. In the catalysts, the introduction of PbO into CeO2-ZrO2-Bi2O3 improved the oxygen release and storage abilities owing to the synergistic redox reaction of Pb2+/4+ and Ce3+/4+, which facilitated the oxidation ability of Pt. In addition, the oxidation of the secondary OH group in glycerol might be accelerated by the geometric effects of glycerol, Pt, and Bi3+ or Pb2+/4+. Furthermore, the moderate reaction conditions such as room temperature and open-air atmosphere enabled the suppression of further oxidation of hydroxypyruvic acid. The highest catalytic activity was obtained for 7 wt% Pt/16 wt% Ce0.60Zr0.15Bi0.20Pb0.05O2−δ/SBA-16, which provided a hydroxypyruvic acid yield maximum of 24.6%, after the reaction for 6 h at 30 °C in atmospheric air.


2022 ◽  
Vol 10 (1) ◽  
pp. 7-18
Author(s):  
Joane Souza ◽  
Renan Almeida ◽  
Ruth Almeida ◽  
Rafael Chagas ◽  
Ian Almeida

The aim of this work is to discuss and analyzing which criteria adopted for fish consumption in the Belém, Pará State, Metropolitan Region through the analysis of the consumer socioeconomic profile, the origin of his knowledge about the theme and his preferences about their fish buying and consumption habits, based on the answers obtained through a questionnaire. The methodology was the application of a questionnaire through the Google Forms platform,composed of 16 questions related to the themes addressed in this work directed to fish consumers in the municipalities of Ananindeua, Belém, Benevides, Castanhal, Marituba, Santa Bárbara do Pará and Santa Isabel do Pará. The questionnaire reached a total of 239 people. When asked about the preference in the choice of fish the dourada appears with about 68% as the preferred species for consumption in the BMR. The survey shows that most purchase places for consumption are the neighborhood fairs with 59% of the answers. Most respondents (about 60%) prefer fresh fish as the most sought-after form of conservation. As to the reason for the choice, the main answer obtained was the taste present in 89% of the interviews. Many respondents claimed that they would consume all types of fish, on the other hand, Tamuatá was chosen as the fish that respondents would not eat because it was seen in poor hygiene environments and had a strong flavor and odor. When asked how they learned to identify the fish freshness, 67% of respondents answered that this knowledge came through family teaching, showing that preference is a personal question and is related to the consumer cultural tradition.


2021 ◽  
Vol 9 (3) ◽  
pp. 225
Author(s):  
Beatriz Maria De Figueiredo Ribeiro
Keyword(s):  

Durante o verão amazônico do ano de 2009, em pesquisa de campo numa área de assentamento da reforma agrária, na cidade de Eldorado dos Carajás – PA, comecei a ouvir de forma recorrente que fulano e beltrano tinham ido para o sem-terra. Havia sempre alguém indo ou voltando de lá. Por sem-terra, as pessoas do assentamento denominavam o acampamento do MST mais próximo; neste caso, tratava-se do Acampamento Dalcídio Jurandir, nome dado à ocupação realizada na Fazenda Maria Bonita, amplamente citada nos noticiários da mídia em 2008 por ter ocorrido, próximo ao local, conflitos violentos desencadeados por parte da escolta armada do Grupo Santa Bárbara - pretenso dono da área -, que rondava o acampamento dia e noite...


2021 ◽  
Vol 15 ◽  
pp. e021019
Author(s):  
Ana Maria Girotti Sperandio ◽  
Tailana Fraga Lima
Keyword(s):  

O estudo parte do pressuposto que a implantação de novas tecnologias sociais, baseada na perspectiva de gênero, torna-se importante instrumento para minimizar as desigualdades da sociedade contemporânea, promovendo ambientes saudáveis e resilientes. Assim, este artigo busca descrever e sistematizar as ações desenvolvidas por um grupo de mulheres para construção de um espaço coletivo e plural a partir do cultivo de Plantas Alimentícias e Medicinais. O trabalho consiste na apresentação de uma experiência ao Viveiro Municipal de Santa Bárbara d’Oeste, cidade localizada no interior do estado de São Paulo, Brasil, onde um grupo de mulheres ocupou o espaço urbano para viabilizar a implementação do viveiro. O projeto é monitorado pelo Grupo de Pesquisa em Metodologias do Planejamento Urbano e Cidades Saudáveis da Universidade. Para tanto, foi realizada uma revisão bibliográfica e documental com a utilização do método observacional e apoio de registros fotográficos para levantamento de dados multidisciplinares para compreensão das variáveis envolvidas com o desenvolvimento do projeto. Durante os anos de 2019-2020 foi identificada a atuação e contribuição feminina no processo de construção de ambientes humanizados, participativos e seus efeitos nas condições de saúde de moradores do entorno. O trabalho desenvolvido em rede indica a facilidade da mulher de responder aos princípios da cidade saudável, apresenta animosidades próprias que podem subsidiar a formação de novas políticas e esforços coletivos que determinam a melhoria das condições e modos de viver.  


Author(s):  
Fermin Francisco Chaiña Chura
Keyword(s):  

El objetivo de la investigación es identificar la demanda social de tecnología agropecuaria en el altiplano peruano como base para un proceso de comunicación horizontal: caso Centro Poblado de Santa Bárbara de Moro, en el departamento de Puno. Aplicando el método cuantitativo-no experimental, se encuestó a 80 jefes de familia para analizar la relación de 10 variables socioeconómicas con las demandas de tecnología agropecuaria. La actividad principal de los actores productivos es la crianza de ganado vacuno, cuyas demandas son predominantes con mayor incidencia en la implementación de cobertizos, sanidad animal, establos, máquinas ordeñadoras, entre otros; de igual forma, para el desarrollo de la pequeña agricultura, se evidenció la necesidad de adquisición de maquinaria agrícola y riego tecnificado. El estado civil, la actividad principal y la tenencia de ganado vacuno están altamente asociados a la demanda de tecnología al 99% (p-valor < 0.01), mientras que el nivel de escolaridad tiene una significancia del 95% (p-valor < 0.05). En conclusión, el estudio demuestra la importancia de la fase de identificación de la demanda de tecnología agropecuaria a partir de la comunicación horizontal, que contribuye al fortalecimiento de las actividades agroalimentarias.


Ecologies ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 366-379
Author(s):  
Ruchira Gangahagedara ◽  
Shyamantha Subasinghe ◽  
Madhushan Lankathilake ◽  
Wasantha Athukorala ◽  
Isurun Gamage

The study of ecosystem services (ES) is becoming increasingly popular, as it plays an important role in human wellbeing, economic growth, and livelihoods. The primary goal of this research is to investigate the global trend in ES research using a rigorous systematic review of highly cited articles. The articles for this study were extracted from Science Citation Index Expanded (SCI-E), Emerging Sources Citation Index (ESCI), and Social Sciences Citation Index (SSCI) databases of Web of Science Core Collection (WoSCC) covering the period from 2000 to 2020. This study was limited to SCI-E, ESCI, and SSCI databases of the Web of Science. The term “ecosystem service/s” has been used as a research term to filter the study sample and eliminate other databases from the analysis. A citation level equal to or greater than 200 was used to further filtration of articles. This query could restrict to 128 articles that are highly cited in the selected period. Bibliometric analysis results show that, according to the author’s keywords, the “ecosystem service/s” keyword is highly connected to the “biodiversity”, “valuation”, “marine spatial planning”, and “conservation planning”. The U.S.A., Canada, China, France, and Australia are the leading countries in the cumulative number of highly cited articles and networks of co-authors. The U.S.A. is a strong contributor to ES research with China, Canada, and France. The most productive universities linked to the United States were the University of Minnesota, the University of California-Santa Barbara (UC Santa Barbara), and the Chinese Academy of Science. The most significant and compelling author is Halpern S Benjamin, who represents UC Santa Barbara. He has earned international recognition for a model he developed to analyze global data sets of anthropogenic drivers of ecological change in marine environments. The most accessed and studied fields in the ES are terrestrial, urban, and marine environments.


2021 ◽  
Vol 10 (15) ◽  
pp. e76101522617
Author(s):  
Fernando Ribeiro de Castro ◽  
Cláudia Fabiana Alves Rezende

A criação de bovinos no Brasil e um dos grandes pilares da economia, no qual a cada dia o foco e a maior disponibilidade de alimento ideal para consumo, gerando melhor aproveitamento das áreas, aumentando assim a produção por hectare. O objetivo com esse trabalho foi verificar a eficiência do uso de corretivos do solo na recuperação de uma pastagem degradada. O experimento realizou se na fazenda Santa Barbara no município de Orizona Goiás, em delineamento experimental de blocos casualizados, com três tratamentos de dez repetições onde os tratamentos foram: T1 testemunha sem aplicação dos corretivos de solo; T2 – aplicação de calcário 2,44 t ha-1; T3 - aplicação de calcário 2,44 t ha-1 e gesso agrícola 0,306 t ha-1. O plantio da Brachiaria brizantha foi feita a lanço no início do período chuvoso com aplicação de 10 Kg ha-1, após 90 dias do plantio foi realizado a coleta do material. Foram realizadas as coletas da forragem com o auxílio de um quadrado de ferro com diâmetro de 1,0 m2, sendo lançado sob a área da pastagens em 10 pontos aleatórios dentro de cada tratamento. Foram avaliados os teores de matéria seca, proteína bruta, umidade, extrato etéreo, fibra bruta, material mineral, Ca%, P%, NDT%. O trabalho apresentou resultado positivo na utilização dos corretivos (calcário + gesso) com aumento de 21% maior produção de matéria seca e níveis de macronutrientes adequados a alimentação animal.


2021 ◽  
Author(s):  
Dan Gunter ◽  
Oluwamayowa Amusat ◽  
Timothy Bartholomew ◽  
Markus Drouven

2021 ◽  
Author(s):  
Hang Yu ◽  
Grayson L Chadwick ◽  
Usha F Lingappa ◽  
Jared Renton Leadbetter

Chemolithoautotrophic manganese oxidation has long been theorized, but only recently demonstrated in a bacterial co-culture. The majority member of the co-culture, Candidatus Manganitrophus noduliformans, is a distinct but not yet isolated lineage in the phylum Nitrospirota (Nitrospirae). Here, we established two additional MnCO3-oxidizing cultures using inocula from Santa Barbara (USA) and Boetsap (South Africa). Both cultures were dominated by strains of a new species, designated Candidatus Manganitrophus morganii. The next abundant members differed in the available cultures, suggesting that while Ca. Manganitrophus species have not been isolated in pure culture, they may not require a specific syntrophic relationship with another species. Phylogeny of cultivated Ca. Manganitrophus and related metagenome-assembled genomes revealed a coherent taxonomic family, Candidatus Manganitrophaceae, from both freshwater and marine environments and distributed globally. Comparative genomic analyses support this family being Mn(II)-oxidizing chemolithoautotrophs. Among the 895 shared genes were a subset of those hypothesized for Mn(II) oxidation (Cyc2 and PCC_1) and oxygen reduction (TO_1 and TO_2) that could facilitate Mn(II) lithotrophy. An unusual, plausibly reverse Complex 1 containing 2 additional pumping subunits was also shared by the family, as were genes for the reverse TCA carbon fixation cycle, which could enable Mn(II) autotrophy. All members of the family lacked genes for nitrification found in Nitrospira species. The results suggest that Ca. Manganitrophaceae share a core set of candidate genes for the newly discovered manganese dependent chemolithoautotrophic lifestyle, and likely have a broad, global distribution.


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