Sorocaba - ICTS - Instituto de Ciência e Tecnologia

URI Permanente para esta coleçãohttps://hdl.handle.net/11449/253851

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Overview of Nanopesticide Environmental Safety Aspects and Regulatory Issues: The Case of Nanoatrazine
(2020-01-01) de Albuquerque, Felícia Pereira ; Preisler, Ana Cristina ; Fraceto, Leonardo F. ; Oliveira, Halley Caixeta ; de Castro, Vera Lucia S. S. ; Universidade Estadual Paulista (UNESP) ; Universidade Estadual de Londrina (UEL) ; Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
The use of nanotechnology to create new formulations has shown great potential to reduce the indiscriminate use of pesticides and provide environmentally safer alternatives. Pesticides formulated using controlled release nanosystems are designed to efficiently provide sufficient and targeted quantities of active ingredients to target organisms, thus improving crop yields and reducing environmental contamination with pesticides. However, the possible harmful effects of these nanomaterials on the environment are not yet well understood, highlighting the need for studies assessing the fate and behavior of nanopesticides in the environment. This chapter will discuss the major challenges and advances in the research regarding nanopesticide risk analysis. It will also discuss the difficulty in developing regulations about the commercialization of nanoproducts, due to the underlying specific features of nanomaterials that drive their reactivity and toxicity. Finally, the case of nanoatrazine will be reviewed, providing an example of how the nanoencapsulation can affect herbicide efficiency and influence its toxicity to different non-target organisms.
Impacts of Magnetic Iron Oxide Nanoparticles in Terrestrial and Aquatic Environments
(2021-01-01) Grillo, Renato ; Fraceto, Leonardo F. ; Federal University of ABC Santo André ; Universidade Estadual Paulista (UNESP)
Use of magnetic iron oxide nanoparticles (IONPs) has found utility across many domains to include biotechnology and medicine, materials science, and environmental remediation. This is due in large part to their small size, surface chemistry, and magnetic properties. Although the properties, synthesis, and diverse industrial and commercial uses of IONPs are well described in the literature, little is known about their potential adverse environmental impacts once released to aquatic and terrestrial ecosystems, and of course possible effects on human health. This chapter comprehensively discusses the emergent commercial applications of IONPs, particularly in clinical medicine, imaging and diagnostic applications, and other areas to include food engineering, and environmental mitigation to include removal of contaminants like heavy metals, dyes, and pesticides, among others. Given their broad utility, this chapter critically discusses the known environmental fate, behavior, and toxicity of IONPs with a particular emphasis on aquatic and terrestrial systems. In the final section of this chapter, the known data and knowledge gaps are surveyed, particularly in regard to the speciation of IONPs nano-particles, trophic transfer and their potential for bioaccumulation, and biomagnification. In addition, the interactive effects of IONPs with diverse environmental species, which is influenced by a variety of environmental conditions to include pH and ionic strength, and temperature is considered. This chapter clearly identifies an urgent need for further environmental research and a critical need to characterize the environmental safety and aquatic/terrestrial toxicity of these novel nanomaterials.
Salvia leucantha essential oil encapsulated in chitosan nanoparticles with toxicity and feeding physiology of cotton bollworm Helicoverpa armigera
(2021-01-01) Dinesh, Devakumar ; Murugan, Kadarkarai ; Subramaniam, Jayapal ; Paulpandi, Manickam ; Chandramohan, Balamurugan ; Pavithra, Krishnasamy ; Anitha, Jaganathan ; Vasanthakumaran, Murugan ; Fraceto, Leonardo Fernandes ; Wang, Lan ; Shoiu-Hwang, Jiang ; Dahms, Hans-Uwe ; Bharathiar University ; Annamalai University ; Kongunadu Arts and Science College ; Universidade Estadual Paulista (UNESP) ; Shanxi University ; National Taiwan Ocean University ; Kaohsiung Medical University
We investigated the effect of encapsulated Chitosan-nanoparticles by using Salvia leucantha essential oil on the insecticidal activity against H. armigera, S. litura and P. xylostella. The encapsulated nanoparticles were characterized by UV-vis, SEM, EDX, FTIR and ZP. Phytochemical analysis of essential oil revealed that the presence of alkaloid, flavonoids, phenolics, and glycosides etc., and GC/MS analysis identified at least 12 compounds, the most abundant constituents were bornyl acetate, 1-Octadecanesulphonyl Chloride, spathulenol and caryophyllene oxide. Bioassays was conducted to find out the toxicity against H. armigera and LC50 values of essential oil was 175.39ppm (larva I) 542.09ppm (pupa), and encapsulations of essential oil was 14.56ppm (I) 63.28ppm (pupa), respectively. Life history parameters and food efficiency utilization measures were significantly affected with concomitant decline in the activities of digestive enzymes after treatment of encapsulated Chitosan-nanoparticles for H. armigera, S. litura and P. xylostella. From the results the nanomatierals are effective and eco-friendly bio-insecticides for not only control bollworm and also other lepidopteran insects such as Spodoptera litura and Plutella xylostella at different crop ecosystem.
Technological and Social Innovations in the Context of Small Brazilian Rural Properties
(2022-01-01) Da Silva, Alexandre Marco ; Universidade Estadual Paulista (UNESP)
For this manuscript, we had the goal to provide a general and concise panorama of the Brazilian agricultural systems, focusing on the small farmers. Currently, the smallholding farmers have experimented with a set of challenges to keep the business ongoing, as rural exodus, climate fluctuations, lack of trade points, lack of public policies, a bad distribution of foods, among others. They also have realized some potentialities of this segment of the economy, as the generation of income, quality of foods, price, and access, autonomy in the activity, quality of life, stay in the countryside, among others. Regarding the technologies, we identified four main groups that are of overall importance: digital technologies, alternative technologies, social technologies, and social innovations. Such groups of technologies are not excluding, but complementary among themselves, and they have been idealized and developed to improve income generation, improve quality of life, make progress in the context of environmental sustainability, and improve the family succession process. Currently, one of the most preoccupying issues related to the smallholding farmers is related to environmental sustainability that might be assessed through indicators that embrace aspects as maintenance of the productive capacity of the agroecosystem, conservation of natural resources, and biodiversity, strengthening the social organization and, as a consequence, reducing poverty, and strengthening of local communities, preserving their traditions, their knowledge, and ensuring participation in the development process. Hence, taking into account that the smallholding farmers constitute the basis of Brazilian agriculture socially and economically, it is commendable that this kind of entrepreneur is supported by governmental programs that permit, enable, and encourage the families to continue the praiseworthy work to produce foods in quality and diversity, allying the agricultural production with environmental protection.
Pesticide removal from industrial effluents using biopolymeric materials
(2020-01-01) Sanchez, Laura Mabel ; Ollier, Romina Paola ; Pereira, Anderson Espirito Santo ; Fraceto, Leonardo Fernandes ; Alvarez, Vera Alejandra ; CONICET-UNMdP ; Universidade Estadual Paulista (UNESP)
Associated with the growth of the human population and the development of the chemical industry, pesticides have been increasingly used for the control of pests in agriculture. As a result, these chemicals are now frequently found in water bodies and industrial wastewater. Therefore there is an evergrowing need to develop materials capable of removing such pollutants from water bodies. Materials with potential for this purpose include biopolymers such as chitosan, cellulose, starch, gums, and cyclodextrins. This chapter presents an overview of pesticides and their fates in the environment, together with examples of biopolymers and their potential applications in the removal of pollutants from water resources. However, in literature, there are only few studies reporting the use of biopolymeric membranes to remove industrial effluents, and, in this way, we have also considered other examples such as biopolymeric particles and treatment of pesticides. It could be concluded from the analysis undertaken that biopolymers have great potential for wastewater treatment, although there are still challenges associated with scale-up and the need for pilot studies before products based on biopolymers can reach the marketplace.
Potential Use of Polymeric Particles for the Regulation of Plant Growth
(2019-01-01) Pereira, Anderson E. S. ; Sousa, Bruno T. ; Iglesias, María J. ; Alvarez, Vera A. ; Casalongué, Claudia A. ; Oliveira, Halley C. ; Fraceto, Leonardo F. ; Universidade Estadual Paulista (UNESP) ; Universidade Estadual de Londrina (UEL) ; Facultad de Ciencias Exactas y Naturales ; UE CONICET Universidad Nacional de Mar del Plata
Plant growth regulators (PGRs) are molecules widely applied in the agriculture, leading to increased crop yield and improved quality of agricultural products. These compounds act as plant hormones, affecting the plant hormonal homeostasis, and thus control plant growth and development. Recently, the development of polymer-based modified release systems for PGRs has emerged as a promising alternative for increasing the efficacy of these compounds. This review will focus on polymeric particles that are used as carrier systems for PGRs, allowing their controlled release and protecting them from degradation. Successful examples include the phytohormone gibberellic acid(GA3)-loaded nanoparticles, which showed higher efficacy than the non-nano active ingredient in promoting seed germination and seedling growth, and salicylic acid (SA) and nitric oxide (NO)-releasing nanoparticles as effective plant protection agents against stresses. Polymeric nanomaterials per se such as chitosan (Cs) can also alter plant signaling pathways and promote plant growth and development. Despite their great potential in improving the plant production with less damage to the environment, relatively few studies have focused on the use of these nanomaterials for the development of modified release systems for PGRs. In this scenario, this review discusses on the major advances and obstacles in the area.
Nonlinear Control Applied in Jump Attenuation of a Non-ideal System
(2022-01-01) Tusset, A. M. ; Kossoski, A. ; Bueno, A. M. ; Balthazar, Jose Manoel ; Felix, J. L.P. ; Cunha, A. ; Avanço, R. H. ; Federal University of Technology ; Universidade Estadual Paulista (UNESP) ; Federal University of Pampa ; Rio de Janeiro State University ; Federal University of Maranhão
This work proposes the attenuation of the Sommerfeld effect (jump phenomenon) present in a non-ideal oscillator thought the use of different nonlinear controllers. The non-ideal system is composed of a beam-like mechanical structure excited by a limited power supply, in this case an unbalanced direct current motor. Two different control techniques are considered. The first controller has its feedback gain obtained through the SDRE (State-Dependent Riccati Equation) technique in conjunction with a feedforward gain. The second controller is based in the SMC (Sliding Mode Control) technique. Numerical simulations show that the two proposed control strategies are effective in suppressing the jump phenomenon, and thus keeping the structure vibration of the studied system at desirable levels.
A Brief Analysis of Artificial Satellites Solar Panels Deployment Considering a Nonlinear Dynamic Model
(2021-01-01) Avanço, Rafael ; Arias, Raibel ; Balthazar, José Manoel ; Tusset, Ângelo Marcelo ; Ribeiro, Maurício Aparecido ; Janzen, Frederic Conrad ; Bueno, Átila Madureira ; Federal University of Maranhão ; Universidade Estadual Paulista (UNESP) ; Federal University of Technology
The present analysis is focused on the nonlinear dynamics of a solar panel opening during the trajectory of a satellite around the Earth, analyzing the dynamics between energy sources and structural response that must not be ignored in real engineering problems. The governing equations were obtained with the Lagrangian function and the results were found using the Runge–Kutta method for integration. These results were found using two different models. One of them considers the panel directly connected to a DC motor and the other considers a torsion spring connected to the motor shaft and the solar panel. As a result, we obtained the time series of the mathematical model proposed.
Integrating a Global Learning Experience into an Inorganic Chemistry Teaching Laboratory
(2020-01-01) Grice, Kyle A. ; Fraceto, Leonardo F. ; DePaul University ; Universidade Estadual Paulista (UNESP)
Science is a global endeavor, and as such, we as instructors should be training our students to see science through an international lens. However, for many students, studying abroad is often too costly or disruptive to degree progress. Therefore, other avenues of interaction with global science can provide similar enriching experiences to a wider range of students. As a part of a required undergraduate inorganic chemistry laboratory course in the United States and a standalone nanomaterials course in Brazil, the authors developed a virtual exchange in which students in both the United States and Brazil synthesized and characterized nanoparticles. Students also learned about nanotechnology and interacted with the students from the other country to discuss their data and do assignments related to nanotechnology. The challenges involved in creating and running such a Global Learning Experience Module in an inorganic chemistry laboratory will be discussed, as well as the Global Learning Experience content and suggestions for how other faculty may create such modules in their courses.
The effects of soil pollution and its relation with morbidity in shoreline areas
(2011-01-01) Lourenço, Roberto Wagner ; Monteiro, Sandra Regina ; Roveda, Masalskiene ; Rosa, Andre Henrique ; Fraceto, Leonardo Fernandes ; Ferreira, Beatriz Antunes Justo ; Donalisio, Maria Rita ; Cordeiro, Ricardo ; Universidade Estadual Paulista (UNESP) ; Universidade Estadual de Campinas (UNICAMP)
Soil is a basic resource representing a fundamental component of ecosystems and natural cycles, a water reservoir, an essential yield for agriculture and further human and animal activities. Soil and subsoil pollution is not only significant in terms of environmental loss, but also a matter of environmental and public health. Solid, liquid and gaseous residues are the major soil contamination agents. They provide from urban conglomerates and industrial areas in which it is possible to emphasize the chemical, petrochemical and textile industry; thermoelectric, mining, and ironmaster activities. The contamination process can thus be defined as compound addition to soil, from what qualitative and or quantitative manners can modify soil natural characteristic and use, producing baneful and deteriorative effects on human health. Studies has shown that human exposition to high concentration of some heavy metals found on soil can cause serious health problems, such as pulmonary or kidney complications, liver and nervous system harm, allergy, and the chronic exposition leads to death. The present study searches for the correlation among soil contamination, done through geochemical baseline survey of a representative industrial contamination area in the shoreline of Sao Paulo state, and verifies if lead, cadmium and mercury concentration exhibit correlation with morbidity rates. On behalf of that, the study will be conducted by spatial analysis using Geographical Information Systems for mapping and data handle. The used data are samples of concentration of heavy metals Cd, Pb and Hg. They were sampled and spatial distributed by geostatistics methods, along with the area morbidity data available from the Info Department of the Brazilian Health System (DATASUS) georeferenced by neighborhood. In order to verify if there is a relation between heavy metals soil pollution and morbidity records spatial distribution, a thematic mapping procedure will be executed with the involved variables. Spatial correlation and regression analysis will be done in addition, using the morbidity registers as the dependable variables and heavy metal variation as the independent variables. It is expected, by the end of the study, to identify the human health potential risk areas, moreover to be able to provide assistance in terms of new methodologies that could facilitate soil pollution control programs and public health planning.
State Observer Applied to Position and Vibration Control Using Flexible Link Manipulator
(2021-01-01) Daltin, Daniel Celso ; Bueno, Átila Madureira ; Balthazar, José Manoel ; Serni, Paulo José Amaral ; Barbosa, Rudnei ; Universidade Estadual Paulista (Unesp)
Vibration control techniques are of a great importance in Aerospace Engineering, Automotive Engineering, Mechanical Engineering, and Robotics, providing stability and well damped behavior to control systems. In this context, this work aims to the development of a mathematical model for the slewing flexible structure, considering both flexible and rigid body motion. In order to obtain the equations of motion, the Euler-Lagrange method is considered. The experimental system consists of a flexible beam with a free end, and the other end clamped to a dc motor axis. The angular position of the motor axis is measured and sampled. The state observer is designed in order to estimate the flexible body motion and the angular speed of the rigid body motion, which are important signals in the feedback of vibration control systems. The mathematical model and the sate observer are experimentally validated. The expected results are the stabilization and damping of the vibration modes of the slewing flexible beam.
Dynamic Friction Model Study Applied to a Servomechanism at Low Velocities
(2021-01-01) Barbosa, Rudnei ; Bueno, Átila Madureira ; Balthazar, José Manoel ; Serni, Paulo José Amaral ; Daltin, Daniel Celso ; Universidade Estadual Paulista (Unesp)
The following work contains an experimental method for identifying dynamic friction in a DC servomotor, whose identification and subsequent compensation is highly important. Friction has characteristics that are difficult to equate and for this reason it becomes very important and necessary to identify nonlinearities and subsequently compensate them. In this paper, based on the DC motor equation using Newton’s law of motion, feasible models are presented and friction is measured and analyzed through Matlab and a Quanser data acquisition card. Nonlinear dynamic friction torque is used and compared with the experimental results of a real servomotor.
Bio-Based Nanoemulsion Formulations Applicable in Agriculture, Medicine, and Food Industry
(2019-01-01) Jampílek, Josef ; Kráľová, Katarína ; Campos, Estefânia V. R. ; Fraceto, Leonardo F. ; Palacky University ; Comenius University ; Universidade Estadual Paulista (Unesp)
Nanotechnology providing “a new dimension” accompanied with new properties conferred to many current materials is widely used for production of a new generation of agrochemicals; in medicine, it enables improved drug bioavailability, reducing undesirable side effects, minimizing non-specific uptake and specific targeting to certain target cells; while in food industry, it has great importance in food protection and biofortification of food with valuable ingredients. In bio-based nanoemulsions belonging to lipid nanocarriers, plant oils used for oil phase, emulsifiers, biosurfactants, cosurfactants, targeting ligands on the surface of nanoemulsion (e.g., folate), or encapsulated active ingredients are of natural origin. The biocomponents of such nanoemulsions show low toxicity to living organisms, could protect encapsulated compounds against degradation, ensure their sustainable release, and reduce the amount of active ingredient necessary for required effect. This chapter presents a comprehensive current overview of recent findings in the field of nanoemulsions and their utilization in agriculture and food industry, with the main emphasis on formulations encapsulating essential oils or plant extracts suitable as effective pesticide preparations as well as medicinal applications of bio-based nanoemulsions, where attention is paid to transdermal nanoemulsion formulations, the use of nanoemulsions in cancer therapy, and for pulmonary and ocular drug delivery. Nanoemulsions formulated with natural emulsifiers, biosurfactants, and biopolymers are presented, and bio-based nanoemulsions of essential oils and their constituents as well as nanoemulsions with encapsulated vitamins, fatty acids, and some bioactive compounds applicable in food products are discussed. Applications of nanoemulsions in edible coatings are outlined as well.
Design e Engenharia: Integração como Estratégia de Inovação nos Parques Tecnológicos
(canal6 edtora, 2015) Barcellos, Ekaterina Emmanuil Inglesis ; Botura Jr, Galdenoro ; Universidade Estadual Paulista (Unesp)
A aproximação dos aspectos humanos e estético-formais do design com as competências cartesianas e objetivas da engenharia é uma realidade que atravessa quase um século sem ter sua adequação e desempenho devidamente consolidados no Brasil. A atuação dos Parques Científicos Tecnológicos brasileiros, do ponto de vista da inovação, não emprega com eficiência estes recursos, e, em comparação com outros países perpassa essa defasagem. A transferência de conhecimento e de excelência acadêmica para os ambientes inovadores e criativos dos Parques Tecnológicos, ainda não se consolidou no país, que, apesar de possuir um grande número de publicações científicas, apresenta um pequeno número de patentes. A integração das áreas consolidaria o conceito de “creative engineering”, que sugere o “redesign da mente de engenharia” e agrega o pensamento criativo sistêmico do design, centrado nos usuários e nas relações homem-máquina. Este trabalho mostra como é necessária a alteração dos modelos e estratégias para que seja possível extrair melhores resultados em ativos inovadores, e principalmente para se alcançar os avanços tecnológicos decorrentes dessa relação.
Coworking: ambiente compartilhado, inovação e ferramenta colaborativa
(canal6 edtora, 2016) Barcellos, Ekaterina Emmanuil Inglesis ; Botura Jr, Galdenoro ; Universidade Estadual Paulista (Unesp)
Desde o princípio dos tempos a ocupação dos espaços pelo homem foi motivada por necessidades essencialmente imediatas. Os ambientes destinados à moradia, convivência social, produção e as diversas atividades do trabalho se configuraram e se modificaram por meio de adaptações em conformidade com a evolução da sociedade em seus anseios por subsistência básica, material e emocional. O amoldamento destes habitats foi impactado pelo constante aperfeiçoamento de processos e técnicas pautados pela inovação, onde produtos e serviços igualmente evoluíram ao longo dos séculos impulsionados pelo pensamento criativo, no intento de melhorar, solucionar, criar, inventar ou inovar, como uma forma de planejar o futuro (NELSON; STOLTERMAN, 2012). Moraes (2016). cita os conceitos de Bauman (2002). quando compara o mundo passado, fundamentalmente sólido com relação ao planejamento de vida linear e fixo. que evoluiu para um mundo complexo e fluído. Até o final do século XX. projetos e planos pessoais e profissionais tinham a duração de médio a longo prazo. ou seja, "(. ..) existiam 'containers disciplinares seguros' nos quais qualquer um poderia se posicionar sentindo-se bem definido em sua identidade profissional (e. consequentemente. no sentido amplo. também na esfera pessoal) " (BERTOLA ; MAZINI, 2004, apud MORAES. 2016). Atualmente. vivemos em um universo fluidificado que não possibilita ações permanentes (BAUMAN, 2002). No contexto descrito. a conformação dos ambientes de trabalho e de produção muito se alterou por inúmeras questões como: custo, produtividade, logística. permanência. facilidades e a importância do networking. Portanto. o desafio atual para designers, produtores e profissionais de áreas projetuais que lidam com tendências futuras, é o de trabalhar em cenários cada vez mais complexos e mutantes, marcados por fluidez e dinamismo (MORAES. 2016). Neste sentido, a atuação transversal do design é essencial, na tentativa de decodificar esta complexidade, identificando tendências. interpretando e caracterizando os produtos. os serviços e as experiências da contemporaneidade. (MORAES. 2016, KRUCKEN. 2016).
Design e Artesanato como Instrumento de Ressocialização: O Caso da DASPRE
(Atena Editora, 2018) Barcellos, Ekaterina Emmanuil Inglesis ; Botura Jr, Galdenoro ; Universidade Estadual Paulista (Unesp)
¾ This article aims to present a study about the training project and social reintegration developed by FUNAP for prisoners and former convicts. The project consists on learning through the Design, Arts and Crafts, conceived as a potential tool for rehabilitation programs in prisons of the State of São Paulo where handcraft workshops develop objects and sustainable products of popular and cultural appeal. Social programs with this profle contribute to the recovery and social inclusion; acquires training and employment opportunity; results in the elevation of the moral and physical level of people gathered in the prison units; generates a future perspective of job placement and improvement of life quality; reframe the symbolic dimension of the popular handmade objects through the visceral and refective Design that brings forth a solution bias and popular handcraft revival, based on the local art of diversity and identity of national culture.
Uso de micro e nanotecnologia com Trichoderma
(Embrapa, 2019) Fraceto, Leonardo Fernandes ; Maruyama, Cintia Rodrigues ; Guilger-Casagrande, Mariana ; Bilesky-José, Natalia ; Lima, Renata de ; Universidade Estadual Paulista (Unesp)
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Bio-based nanoemulsion formulations applicable in agriculture, medicine, and food industry
(Springer, 2019-07-05) Jampílek, Josef ; Kráľová, Katarína ; Campos, Estefânia V. R. ; Fraceto, Leonardo Fernandes ; Universidade Estadual Paulista (Unesp)
Nanotechnology providing “a new dimension” accompanied with new properties conferred to many current materials is widely used for production of a new generation of agrochemicals; in medicine, it enables improved drug bioavailability, reducing undesirable side effects, minimizing non-specific uptake and specific targeting to certain target cells; while in food industry, it has great importance in food protection and biofortification of food with valuable ingredients. In bio-based nanoemulsions belonging to lipid nanocarriers, plant oils used for oil phase, emulsifiers, biosurfactants, cosurfactants, targeting ligands on the surface of nanoemulsion (e.g., folate), or encapsulated active ingredients are of natural origin. The biocomponents of such nanoemulsions show low toxicity to living organisms, could protect encapsulated compounds against degradation, ensure their sustainable release, and reduce the amount of active ingredient necessary for required effect. This chapter presents a comprehensive current overview of recent findings in the field of nanoemulsions and their utilization in agriculture and food industry, with the main emphasis on formulations encapsulating essential oils or plant extracts suitable as effective pesticide preparations as well as medicinal applications of bio-based nanoemulsions, where attention is paid to transdermal nanoemulsion formulations, the use of nanoemulsions in cancer therapy, and for pulmonary and ocular drug delivery. Nanoemulsions formulated with natural emulsifiers, biosurfactants, and biopolymers are presented, and bio-based nanoemulsions of essential oils and their constituents as well as nanoemulsions with encapsulated vitamins, fatty acids, and some bioactive compounds applicable in food products are discussed. Applications of nanoemulsions in edible coatings are outlined as well
Potential use of polymeric particles for the regulation of plant growth
(Springer, 2019-08-02) Pereira, Anderson E. S. ; Sousa, Bruno T. ; Iglesias, María J. ; Alvarez, Vera A. ; Casalongué, Claudia A. ; Oliveira, Halley C. ; Fraceto, Leonardo Fernandes ; Universidade Estadual Paulista (Unesp)
Plant growth regulators (PGRs) are molecules widely applied in the agriculture, leading to increased crop yield and improved quality of agricultural products. These compounds act as plant hormones, affecting the plant hormonal homeostasis, and thus control plant growth and development. Recently, the development of polymer-based modified release systems for PGRs has emerged as a promising alternative for increasing the efficacy of these compounds. This review will focus on polymeric particles that are used as carrier systems for PGRs, allowing their controlled release and protecting them from degradation. Successful examples include the phytohormone gibberellic acid(GA3)-loaded nanoparticles, which showed higher efficacy than the non-nano active ingredient in promoting seed germination and seedling growth, and salicylic acid (SA) and nitric oxide (NO)-releasing nanoparticles as effective plant protection agents against stresses. Polymeric nanomaterials per se such as chitosan (Cs) can also alter plant signaling pathways and promote plant growth and development. Despite their great potential in improving the plant production with less damage to the environment, relatively few studies have focused on the use of these nanomaterials for the development of modified release systems for PGRs. In this scenario, this review discusses on the major advances and obstacles in the area
IoT-based networked control systems: A proposal and case study
(2018-01-01) Bigheti, Jeferson André ; Risso, Sérgio Luiz ; Godoy, Eduardo Paciência ; National Service of Industrial Training (SENAI) ; Universidade Estadual Paulista (Unesp)
New manufacturing applications such as Industry 4.0 have focused on the joint use of industrial automation and information technology for greater efficiency, quality and productivity. For the development and implementation of this new approach, it is necessary to apply some recent technologies such as Internet of Things (IoT), wireless network control systems (WNCS) and Cloud Computing. This work presents the proposal of an IoT-based networked control architecture based on integration of a WNCS to a Web server. Control system devices communicate via COAP protocol and the Web server is implemented using the open source tool Node.js. A case study using the Hardware-In-the-Loop (HIL) technique evaluates the closed loop control of a level plant through a modified PID controller with communication via Web Service RESTful with the data server.

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