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1.
Braz. arch. biol. technol ; 64(spe): e21210148, 2021. tab, graf
Article in English | LILACS | ID: biblio-1339319

ABSTRACT

Abstract The Brazilian Power Sector is preparing the introduction of battery energy storage in its distribution lines for energy quality control. The technical and financial viability of this new technology depends on several factors: battery technologies, geographical locations, environmental restrictions and the local regulation. One of the objectives of the present project was to create a methodology for helping technicians to choose the best battery technology for each particular application. The Analytic Hierarchy Process - AHP algorithm was selected to take into account all the above-mentioned factors. This methodology was applied to a case study considering four different commercially available battery energy storage systems (BESS) and the methodology was able to recommend the best choice by taking into account all the criteria and subcriteria considered. The second objective of the present project is to evaluate a real hybrid BESS operation composed of two different battery technologies. Up to the moment when this paper was submitted the BESS has not been installed yet. The installation place has already been selected, a feeder-line with 1,360 kW peak power, and monitored for energy quality. The BESS has been sized, a 250 kW/1 MWh flow battery together with a 250 kW/500 kWh lithium-ion battery and the purchase process has been initiated. Both battery technologies will work in separate and joint operations for power quality in on-grid and island cases.


Subject(s)
Tensile Strength , Electricity , Batteries , Algorithms
2.
Article in Chinese | WPRIM | ID: wpr-879285

ABSTRACT

In order to solve the current problems in medical equipment maintenance, this study proposed an intelligent fault diagnosis method for medical equipment based on long short term memory network(LSTM). Firstly, in the case of no circuit drawings and unknown circuit board signal direction, the symptom phenomenon and port electrical signal of 7 different fault categories were collected, and the feature coding, normalization, fusion and screening were preprocessed. Then, the intelligent fault diagnosis model was built based on LSTM, and the fused and screened multi-modal features were used to carry out the fault diagnosis classification and identification experiment. The results were compared with those using port electrical signal, symptom phenomenon and the fusion of the two types. In addition, the fault diagnosis algorithm was compared with BP neural network (BPNN), recurrent neural network (RNN) and convolution neural network (CNN). The results show that based on the fused and screened multi-modal features, the average classification accuracy of LSTM algorithm model reaches 0.970 9, which is higher than that of using port electrical signal alone, symptom phenomenon alone or the fusion of the two types. It also has higher accuracy than BPNN, RNN and CNN, which provides a relatively feasible new idea for intelligent fault diagnosis of similar equipment.


Subject(s)
Algorithms , Electricity , Memory, Short-Term , Neural Networks, Computer
3.
Article in Chinese | WPRIM | ID: wpr-878538

ABSTRACT

Microbial fuel cell (MFC) is a bioelectrochemical device, that enables simultaneous wastewater treatment and energy generation. However, a few issues such as low output power, high ohmic internal resistance, and long start-up time greatly limit MFCs' applications. MFC anode is the carrier of microbial attachment, and plays a key role in the generation and transmission of electrons. High-quality bioelectrodes have developed into an effective way to improve MFC performance. Conjugated polymers have advantages of low cost, high conductivity, chemical stability and good biocompatibility. The use of conjugated polymers to modify bioelectrodes can achieve a large specific surface area and shorten the charge transfer path, thereby achieving efficient biological electrochemical performance. In addition, bacteria can be coated with nano-scale conjugated polymer and effectively transfer the electrons generated by cells to electrodes. This article reviews the recently reported applications of conjugated polymers in microbial fuel cells, focusing on the MFC anode materials modified by conjugated polymers. This review also systematically analyzes the advantages and limitations of conjugated polymers, and how these composite hybrid bioelectrodes solve practical issues such as low energy output, high inner resistance, and long starting time.


Subject(s)
Bacteria , Bioelectric Energy Sources , Electricity , Electrodes , Polymers , Water Purification
4.
São Paulo; s.n; 2020. 117 p.
Thesis in Portuguese | LILACS | ID: biblio-1178160

ABSTRACT

A abordagem do nexo entre água, energia e alimentos (ou simplesmente nexo) parte do entendimento de que esses três recursos estão conectados por uma relação de interdependência marcada por trade-offs e sinergias. Sendo assim, o nexo pode contribuir com a otimização do uso de recursos por promover a produção de mais utilizando menos. Entretanto, a falta de metodologias e instrumentos analíticos abrangentes não favorece o desenvolvimento de uma percepção mais holística e integrada das dimensões sociais, ambientais e econômicas envolvendo a complexidade dessas relações de interdependência. Diante disso, este trabalho teve o objetivo principal de propor uma matriz de indicadores baseada no modelo FPSEEA da Organização Mundial de Saúde para validar essa estrutura como um instrumento analítico capaz de explorar a (in)sustentabilidade do nexo em sistemas urbanos complexos, como é o caso da Macrometrópole Paulista (MMP). Para definir e sistematizar os indicadores de acordo com o significado atribuído para cada um dos eixos do modelo foi realizada uma revisão não sistemática das literaturas e consulta a alguns dos sistemas de informação de domínio público do país. Utilizou-se, também, de uma matriz de correlação e clusters obtidos a partir da técnica Self organizing map para analisar e interpretar dados de 2016 que foram extraídos para os 180 municípios da Macrometrópole, a fim de testar a aplicabilidade do modelo e delinear um panorama de sustentabilidade da região que serviu de unidade experimental. Apesar da indisponibilidade de alguns dos dados para todos os municípios ter se apresentado como uma limitação para a construção da matriz, verificou-se que o modelo demonstrou viabilidade para as atividades de identificação e análise dos trade-offs do nexo. Com base na análise dos dados, foi percebida uma nova centralidade de municípios e relações de injustiça para a MMP. Trata-se de uma centralidade divergente ao acúmulo de capital por abranger municípios que sustentam o desenvolvimento humano e regional por meio de uma maior concentração de infraestrutura verde que presta serviços ecossistêmicos que subsidiam o abastecimento de água, energia e alimentos. Porém, em termos de desenvolvimento humano, os mesmos municípios que foram classificados como provedores de recursos não contam com as mesmas oportunidades dos demais. Conclui-se, portanto, que a abordagem do nexo ainda continua sendo um desafio epistemológico e de gestão. Além disso, as intervenções e políticas de desenvolvimento sustentável da MMP precisam estar mais alinhadas às necessidades sociais apresentadas pelos municípios classificados como provedores, pois esses municípios são estratégicos em termos de conservação e provisão de elementos fundamentais à manutenção da vida na região macrometropolitana.


The water-energy-food nexus (or just nexus) begins from the understanding that these three resources are connected by an interdependence relationship marked by trade-offs and synergies. Thus, the nexus approach can contributes to the optimization of the resources management by promoting the production of more while spending less. However, the lack of comprehensive analytical methodologies and instruments does not contribute to the development of more holistic and integrated perception of the social, environmental and economic dimensions involving the complexity of interdependence relationships. Therefore, this work aimed to propose a matrix of indicators based on the DPSEEA (WHO) framework to validate the structure as an instrument capable of exploring the sustainability of the nexus in complex urban systems, such as the São Paulo Macrometropolis (SPM). In order to define and systematize the indicators according to the meaning attributed to each of the axes of the DPSEEA framework, a non-systematic literature review was carried out and consultation of some of the country's domain information systems as well. It was also used a correlation matrix and clusters obtained from the Self organizing map technique to analyze and interpret data from 2016 that were extracted for the 180 municipalities of SPM, in order to test the applicability of the DPSEEA framework and outline a sustainability panorama of the region that served as an experimental unit. The lack of data for some municipalities was presented as a limitation for the construction of the matrix, but the framework demonstrated viability for the activities of identification and analysis of the nexus trade-offs. Based on the data analysis, a new centrality of municipalities and relations of Injustice for the SPM was perceived. It is a divergent centrality to the accumulation of capital because it encompasses municipalities that support human and regional development through a greater concentration of green infrastructure that provides ecosystem services that subsidize the supply of water, energy and food. However, in terms of human development, the same municipalities that were classified as resource providers do not have the same opportunities as the others. It is concluded, therefore, that the nexus approach still remains an epistemological and management challenge. In addition, SPM's sustainable development interventions and policies need to be more in line with the social needs presented by municipalities classified as providers, as these municipalities are strategic in terms of conservation and provision of essential elements for maintaining life in the macrometropolitan region.


Subject(s)
Water , Electricity , Sustainable Development Indicators , Food , Human Development
5.
Article in Chinese | WPRIM | ID: wpr-828194

ABSTRACT

Facing the new situation of national green development, energy conservation and environmental protection, this study systematically expounds the energy consumption management of medical electrical equipment in USA, Europe and China, and puts forward suggestions on green development of medical electrical equipment in China.


Subject(s)
Electricity , Energy-Generating Resources , Equipment and Supplies
6.
Article in Chinese | WPRIM | ID: wpr-828169

ABSTRACT

Wireless power transfer (WPT) is a new power transmission way, which can be widely used in electric vehicles and other fields. Its electromagnetic environment must be analyzed to ensure safe application. A low-power wireless power transfer system experimental platform was built, with 25 W receiving power and 47 kHz resonant frequency, which was used to carry out animal experiments. Treatment mice were exposed to environment of wireless power transfer system for 5 h a day and 6 days as one cycle. At the end of every cycle, learning memory behavior of mice were detected in T-shaped maze. The exposure experiment lasted for 12 weeks. Finally, immune parameters, sex hormones and part of organ physiological structure were detected. The results are as follows: as exposure time increased, memory behavior of mice did not change obviously with no statistical difference in sex hormone either ( > 0.05), the concentration of immune factors including tumor necrosis factor-α (TNF-α), interleukin 6 (IL-6) and interleukin-1 beta (IL-1β) significantly increased ( < 0.05), and the structure of some organs showed some changes. The experimental results show that the environment of the wireless power transfer system has no effect on the memory behavior of mice, and has some effect on physiological properties of mice.


Subject(s)
Animals , Cytokines , Electric Power Supplies , Electricity , Electromagnetic Fields , Gonadal Steroid Hormones , Memory , Mice , Wireless Technology
7.
Chinese Journal of Biotechnology ; (12): 2719-2731, 2020.
Article in Chinese | WPRIM | ID: wpr-878524

ABSTRACT

Exoelectrogens are promising for a wide variety of potential applications in the areas of environment and energy, which convert chemical energy from organic matter into electrical energy by extracellular electrons transfer (EET). Microorganisms with different mechanisms and EET efficiencies have been elucidated. However, the practical applications of exoelectrogens are limited by their fundamental features. At present, it is difficult to realize the extensive application of exoelectrogens in complex and diverse environments by means of traditional engineering strategies such as rational design and directed evolution. The exoelectrogens with excellent performance in environments can be screened with efficient strain identification technologies, which promote the widespread applications of exoelectrogens. The aims of this review are to summarize the methods of screening based on different types of exoelectrogens, and to outline future research directions of strain screening.


Subject(s)
Bioelectric Energy Sources , Electricity , Electron Transport
8.
Psicol. ciênc. prof ; 39: e185833, jan.-mar.2019. tab
Article in Portuguese | LILACS-Express | LILACS, INDEXPSI | ID: biblio-1098512

ABSTRACT

Resumo O objetivo deste estudo foi examinar, por meio de revisão integrativa de artigos empíricos, a produção científica relacionando a Psicologia Ambiental (variáveis de comportamento/cognição) e sustentabilidade, considerando diferentes recursos. Para efeitos deste estudo, foram analisados os artigos que abordam um recurso único. A busca foi realizada nos periódicos Environment and Behavior, Journal of Environmental Psychology e Psyecology, reconhecidos pela relevância internacional em produção científica no campo da Psicologia Ambiental. Foram selecionados 24 artigos, publicados entre os anos de 2012 e 2016, a partir dos critérios de inclusão pré-estabelecidos. Os anos com maior número de publicação foram 2014 (n = 8) e 2015 (n = 8). A maioria dos artigos se refere a estudos realizados na Europa, apenas um trata de pesquisa no Brasil. Os recursos abordados nos estudos abrangeram transporte, produtos, água, energia elétrica, sacola plástica e pastagem natural. Os resultados revisados demonstram que há uma diversidade de conceitos na mediação entre comportamentos/cognições e diferentes recursos, indicando a relevância destas abordagens para a promoção de sustentabilidade. Sugere-se caminhos para pesquisa e intervenção nas relações sustentáveis entre pessoas e recursos disponíveis em seus meios.


Abstract The objective of this study was to examine, through an integrative review of empirical articles, the scientific production on the relation between Environmental Psychology (behavior/cognition variables) and sustainability considering different resources. For that purpose, this analysis considered articles approaching a unique resource. Search was conducted in three journals with international relevance in the scientific production of Environmental Psychology: Environment and Behavior, Journal of Environmental Psychology and Psyecology. Following pre-established inclusion criteria, results included 24 articles published from 2012 and 2016. Years with higher number of publications were 2014 (n = 8) and 2015 (n = 8). The articles found refer mostly to studies conducted in Europe; only one article is a research from Brazil. Resources included transportation, products, water, energy, plastic bag, and natural grassland. Results indicate that there is a diversity of concepts mediating behaviors/cognitions and different resources, which reveals the relevance of these approaches to the promotion of sustainability. Research and intervention paths are suggested to sustainable relations between people and resources available in their surroundings.


Resumen El objetivo de este estudio fue examinar, por medio de una revisión integradora de artículos empíricos, la producción científica que relaciona la Psicología Ambiental (variables de comportamiento/cognición) y la sostenibilidad, considerando diferentes recursos. Para los propósitos de este estudio, se analizaron artículos que abordan un solo recurso. La búsqueda fue realizada en los periódicos Environment and Behavior, Journal of Environmental Psychology y Psyecology, reconocidos por la relevancia internacional en producción científica en el campo de la Psicología Ambiental. Se seleccionaron 24 artículos, publicados entre los años 2012 y 2016, basados en criterios de inclusión preestablecidos. Los años con el mayor número de publicaciones fueron 2014 (n = 8) y 2015 (n = 8). La mayoría de los artículos se refiere a estudios realizados en Europa, sólo uno trata de investigación en Brasil. Los recursos abordados en los estudios incluyeron transporte, productos, agua, energía eléctrica, bolsas de plástico y pastoreo natural. Los resultados revisados demuestran que hay una diversidad de conceptos en la mediación entre comportamientos/cogniciones y diferentes recursos, indicando la relevancia de estos enfoques para la promoción de la sostenibilidad. Se sugieren caminos para la investigación e intervención en las relaciones sostenibles entre personas y recursos disponibles en sus medios.


Subject(s)
Environment , Scientific and Technical Activities , Environmental Psychology , Sustainable Development , Plastics , Psychology , Transportation , Water , Pasture , Natural Resources , Electricity
9.
Article in Chinese | WPRIM | ID: wpr-772523

ABSTRACT

This article summarizes the common problems in registration and supervision testing of infrared therapy equipment, combines YY 0306-2008 Particular requirements for the safety of heat radiation therapy equipment, GB 9706.1-2007 Medical electrical equipment-Part 1:General requirements for safety, Registration technical review guidelines for infrared treatment equipment, etc. This paper analyzes and discusses the following aspects, including classification and applicable standards, performance indicators and overtemperature protection. Some suggestions and solutions are given to provide some guidance for medical equipment manufacturers in design, research and development and registration, in order to avoid the problem effectively and improve the passing rate of testing.


Subject(s)
Electricity , Equipment Design , Equipment Safety , Infrared Rays
10.
Article in Korean | WPRIM | ID: wpr-759876

ABSTRACT

The authors investigated the cases of electrocution suicides in South Korea from 2008 to 2018. Out of 151,419 suicides during this 11-year period, suicide by electrocution was extremely rare. Only nine victims were recorded in eight cases, with one case involving a married couple. The majority of the victims were men (89%), and only one case involved a woman (11%). The mean age of the victims was 55 years, and ranged from 38 to 74 years. In all cases, the suicides occurred in the home, and low-voltage electricity was used. Two of the nine victims (22%) had an occupation related with electrical knowledge. Mental illness, such as depression and schizophrenia, was found in two cases (22%). An autopsy was not performed in all cases.


Subject(s)
Autopsy , Depression , Electricity , Female , Humans , Korea , Male , Occupations , Schizophrenia , Suicide
11.
Article in English | WPRIM | ID: wpr-764034

ABSTRACT

Recently, the importance of on-site detection of pathogens has drawn attention in the field of molecular diagnostics. Unlike in a laboratory environment, on-site detection of pathogens is performed under limited resources. In this study, we tried to optimize the experimental conditions for on-site detection of pathogens using a combination of ultra-fast convection polymerase chain reaction (cPCR), which does not require regular electricity, and nucleic acid lateral flow (NALF) immunoassay. Salmonella species was used as the model pathogen. DNA was amplified within 21 minutes (equivalent to 30 cycles of polymerase chain reaction) using ultra-fast cPCR, and the amplified DNA was detected within approximately 5 minutes using NALF immunoassay with nucleic acid detection (NAD) cassettes. In order to avoid false-positive results with NAD cassettes, we reduced the primer concentration or ultra-fast cPCR run time. For singleplex ultra-fast cPCR, the primer concentration needed to be lowered to 3 µM or the run time needed to be reduced to 14 minutes. For duplex ultra-fast cPCR, 2 µM of each primer set needed to be used or the run time needed to be reduced to 14 minutes. Under the conditions optimized in this study, the combination of ultra-fast cPCR and NALF immunoassay can be applied to on-site detection of pathogens. The combination can be easily applied to the detection of oral pathogens.


Subject(s)
Convection , DNA , Electricity , Immunoassay , NAD , Pathology, Molecular , Polymerase Chain Reaction , Salmonella
12.
Article in English | LILACS | ID: biblio-1020891

ABSTRACT

ABSTRACT OBJECTIVE To evaluate the " Energía, la justa " program, aimed at reducing energy poverty in the city of Barcelona, from the point of view of the target population and the workers involved in the intervention. METHODS A qualitative, descriptive and exploratory pilot study was carried out, with a phenomenological approach. Twelve semi-structured interviews were conducted: to three users, three energy agents who performed interventions in the homes, and six professionals who participated in the program coordination. A thematic content analysis was carried out using Atlas-ti software . Interviews were conducted between October 2016 and March 2017. RESULTS Trust in a contact person (e.g. social workers) facilitated the participation, although there were difficulties reaching people who had illegal energy supplies, immigrant women or immigrants who subrent properties. Regarding implementation, home visits, energy efficiency advice and the relationship with energy agents were the best assessed aspects. However, not being able to carry out reforms in deteriorated dwellings was considered a limitation. The program also contributed to raise awareness on energy rights, to save on utility bills and to generate tranquility and social support. CONCLUSIONS Programs such as this one can promote energy empowerment and improve psychosocial status. However, strategies with a gender and equity perspective should be considered to reach other vulnerable groups.


RESUMEN OBJETIVO Conocer las valoraciones del programa "Energía, la justa" orientado a reducir la pobreza energética en la ciudad de Barcelona, desde la perspectiva de las personas destinatarias y de las personas trabajadoras involucradas en la intervención. MÉTODOS Estudio piloto realizado con metodología cualitativa, de tipo descriptivo y exploratorio, analizado desde un enfoque fenomenológico. Se realizaron 12 entrevistas semi-estructuradas: a tres personas destinatarias, a tres agentes energéticos que realizaron intervención en los hogares y a seis profesionales que participaron en la coordinación del programa. Se realizó un análisis de contenido temático mediante el software Atlas-ti. Las entrevistas se realizaron entre octubre de 2016 y marzo de 2017. RESULTADOS La confianza con una persona de contacto (por ejemplo, trabajadoras sociales) facilitó la participación, pero hubo dificultad para acceder a personas que tenían los suministros ilegales, mujeres inmigrantes o inmigrantes que subalquilaban pisos. Respecto a la implementación, las visitas domiciliarias, el asesoramiento en materia de eficiencia energética y la relación con los agentes energéticos, fueron los aspectos mejor valorados. Sin embargo, se consideró como limitación no poder realizar reformas en viviendas muy deterioradas. A nivel de impacto, el programa contribuyó al conocimiento de los derechos energéticos, a ahorrar en las facturas de los suministros y a generar mayor tranquilidad y soporte social. CONCLUSIONES Programas como este fomentan el empoderamiento en materia energética y producen mejoras a nivel psicosocial. No obstante, se deberían desarrollar estrategias con perspectiva de género y de equidad para llegar a otros colectivos especialmente vulnerables.


Subject(s)
Humans , Energy-Generating Resources/economics , Poverty , Spain , Surveys and Questionnaires , Delivery of Health Care , Qualitative Research , Electricity , Emigrants and Immigrants , Health Services Accessibility
13.
Braz. oral res. (Online) ; 33: e037, 2019. tab, graf
Article in English | LILACS | ID: biblio-1001598

ABSTRACT

Abstract: Iontophoresis is a noninvasive technique, based on the application of a constant low-intensity electric current to facilitate the release of a variety of drugs, whether ionized or not, through biological membranes. The objective of this research was to evaluate the effect of iontophoresis using different electric current intensities on the uptake of fluoride in dental enamel with artificial caries lesions. In this in vitro operator-blind experiment, bovine enamel blocks (n = 10/group) with caries-like lesions and predetermined surface hardness were randomized into 6 groups: placebo gel without fluoride applied with a current of 0.8 mA (negative control), 2% NaF gel without application of any current, and 2% NaF gel applied with currents of 0.1, 0.2, 0.4 and 0.8 mA. Cathodic iontophoresis was applied for 4 min. The concentration of loosely bound fluoride (calcium fluoride) and firmly bound fluoride (fluorapatite) was determined. The results were analyzed by the nonparametric Kruskal-Wallis and Dunn tests. Iontophoresis at 0.8 mA, combined with the application of fluoridated gel (2% NaF), increased fluoride uptake in enamel with caries-like lesions, as either calcium fluoride or fluorapatite.


Subject(s)
Animals , Cattle , Cariostatic Agents/pharmacology , Iontophoresis/methods , Dental Caries , Dental Enamel/drug effects , Fluorides/pharmacology , Apatites/analysis , Surface Properties/drug effects , Calcium Fluoride/analysis , Random Allocation , Treatment Outcome , Disease Models, Animal , Electricity , Hardness/drug effects
14.
Braz. arch. biol. technol ; 62(spe): e19190019, 2019. graf
Article in English | LILACS | ID: biblio-1055441

ABSTRACT

Abstract In a world where technology is even more essential, quality and reliability of electrical system are fundamental. In Brazil, country where most of the energy is produced thought power plants, the existing distribution network is overwhelmed and the needs for the consolidation of distributed generation is growing. Wind and Solar power generation from biomass and another renewable sources are one alternative to power plants, which requires large areas and massive investment. The renewable energy sources mentioned may be assembled in a way to generate reliable energy to properties far from the cities, such as rural zones, where often energy from power plants doesn't gets to. Distributed generation allows quick development of Brazilian farming and guarantees to the farmer independence from the energy dealerships. Microgrids assembled with renewable sources are one sustainable option and benefits Brazilian economy and society.


Subject(s)
Biomass , Electricity , Renewable Energy , Rural Areas , Sustainable Agriculture
15.
Braz. arch. biol. technol ; 62(spe): e19190022, 2019. tab, graf
Article in English | LILACS | ID: biblio-1055434

ABSTRACT

Abstract: Humanity is increasingly dependent on energy, which demand grows every year. Renewable energy sources are consolidated alternatives in the market, previously installed on a small scale but now thought as large plants. The correct operation, taking full advantage of the generation potential, depends on studies of the place of implantation, such as radiation levels, temperature, latitude, etc. Two photovoltaic systems installed in the city of Curitiba were studied in order to monitor their respective performances through figures of merit.


Subject(s)
Electricity , Photovoltaic Energy , Power Plants , Brazil
16.
Braz. arch. biol. technol ; 62(spe): e19190020, 2019.
Article in English | LILACS | ID: biblio-1055433

ABSTRACT

Abstract Around the world there's a rising interest in the installation of renewable energy sources due to their ecological, economical, political and social advantages. In this article is studied specifically the case of the incentive towards the installation of these sources in the state of Parana's rural area, where they wouldn't just be ecologically interesting, but also would help the improvement on the living conditions of the rural producers, promote income distribution and would cause an increase on the power supply, this way reducing the tariff. However, the problem arises in the acquisition of the energy generator, since even though they are interesting for the rural producers, these sources are majorly too expensive and end up being beyond their purchasing power. Based on that, this article brings a selection of public policies that could make the use of these sources viable in the rural area of the state, based on the experiences of other countries who face or have faced in the past similar difficulties, like China or India, and countries who have become reference in the matter, like Germany.


Subject(s)
Public Policy , Renewable Energy , Brazil , Rural Areas , Electricity
17.
Braz. arch. biol. technol ; 62(spe): e19190001, 2019. tab, graf
Article in English | LILACS | ID: biblio-1055430

ABSTRACT

Abstract Advances in energy demand in rural areas cannot be dissociated from agricultural modernization, large estates, mechanization of labor and reduced investment in small production. The use of biogas together with biomass are the most cost-effective ways for the small producer, as it has a high calorific value. In the case of biogas the procedure is performed by combining a compressor and a chiller, allowing the gas enter the reactor and burn together with the air stream. The use of these techniques is an auxiliary way to reduce the cost of the producer to produce a certain crop, besides allowing a participation in the final energy supply, so that the utilities have an alternative to distribute the surplus energy to another region, serving thus a wider range in the rural area.


Subject(s)
Rural Areas , Biomass , Electricity , Biofuels
18.
Chinese Journal of Biotechnology ; (12): 2367-2385, 2019.
Article in Chinese | WPRIM | ID: wpr-781632

ABSTRACT

Nanogenerator (triboelectric nanogenerator and piezoelectric nanogenerator) has experienced a rapid development since it was proposed. This technique can covert various mechanical energies into electric energy, including human motion energy, wind energy, acoustic energy and ocean energy. The converted electricity can be used for health monitoring and physiological function regulation, such as pulse detection, bioelectrical stimulation and cardiac pacing. This review summarizes the structure, working mechanism, output performance of nanogenerator and its latest progress in circulatory system, nervous system, biological tissue, sleep and rescue system. Additionally, a further analysis was also made on the application challenge of nanogenerator in clinical treatment. In the future, nanogenerator is expected to be an auxiliary power source, or even to replace battery to power medical electronic device and realize the self-powered health monitoring and physiological function regulation of human body.


Subject(s)
Electric Power Supplies , Electricity , Humans
19.
Electron. j. biotechnol ; 31: 34-43, Jan. 2018. ilus, tab, graf
Article in English | LILACS | ID: biblio-1022040

ABSTRACT

Background: Microbial Fuel Cell (MFC) technology is used in various applications such as wastewater treatment with the production of electrical energy. The objective of this study was to estimate the biodepuration of oils and fats, the elimination of blue dye brl and bioelectro-characterization in MFCs with Chlorella vulgaris and bacterial community. Results: The operation of MFCs at 32 d showed an increase in bioelectrogenic activity (from 23.17 to 327.67 mW/m2 ) and in the potential (from 200 to 954 mV), with biodepuration of fats and oils (95%) in the microalgal cathode, and a removal of the chemical oxygen demand COD (anode, 71%, cathode, 78.6%) and the blue dye brl (73%) at the anode, here biofilms were formed by the bacterial community consisting of Actinobacteria and Deltaproteobacteria. Conclusions: These findings suggest that MFCs with C. vulgaris and bacterial community have a simultaneous efficiency in the production of bioelectricity and bioremediation processes, becoming an important source of bioenergy in the future.


Subject(s)
Bacteria/metabolism , Bioelectric Energy Sources/microbiology , Water Purification/methods , Chlorella vulgaris/metabolism , Bacteria/chemistry , Biofilms , Chlorella vulgaris/chemistry , Electricity , Electrodes , Microalgae , Denaturing Gradient Gel Electrophoresis , Waste Water
20.
Article in Chinese | WPRIM | ID: wpr-775552

ABSTRACT

This article elaborates electromagnetic compatibility of medical electrical equipment and the regulatory tests based on related standards. And elaborating the diversity and the necessity of rectification by specific cases and deeply discussing and summing up for improving the compatibility of medical electrical equipment.


Subject(s)
Electricity , Electromagnetic Fields , Equipment Failure , Equipment and Supplies
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