Meio dispersivo na síntese eficiente de nanopartículas de prata para aplicação em tecidos antimicrobianos

Silver nanoparticles have been increasingly used in industrial applications for a long time. Chemical methods of synthesizing silver nanoparticles can be toxic and expensive. Therefore, many studies have emerged to create ecologically correct synthetic routes that provide good dispersion and stability in the extractive medium. Plant species are investigated for the discovery of a new dispersive medium for silver nanoparticles (AgNPs) synthesized by the green route. AgNPs are disperse in plant extract, by plants available in Brazil. In this work, Melissa Officinalis leaves were used as a dispersive medium of nanoparticles. The characterization techniques used became possible to observe the superficial modifications with the presence of well-dispersed nanostructures, which are fundamental for the production of intelligent textiles with antimicrobial action. Thus, it was possible by means of each synthesis route to evaluate the dispersion and morphology of AgNPs in different dispersive media of Melissa Officinalis, concluding that it is very efficient for the stabilization of AgNPs.As nanopartículas de prata têm sido cada vez mais utilizadas em aplicações industriais há muito tempo. Os métodos químicos de síntese de nanopartículas de prata podem ser tóxicos e caros. Portanto, muitos estudos têm surgido para criar rotas de síntese ecologicamente corretas que forneçam boa dispersão e estabilidade no meio extrativo. Espécies vegetais são investigadas para a descoberta de um novo meio dispersivo para nanopartículas de prata (AgNPs) sintetizadas por via verde. As AgNPs estão dispersas em extrato vegetal, por plantas disponíveis no Brasil. Neste trabalho foram utilizadas folhas de Melissa Officinalis como meio dispersivo das nanopartículas. Através das técnicas de caracterização utilizadas foi possível observar as modificações superficiais com a presença de nanoestruturas bem dispersas, que são fundamentais para a confecção de tecidos inteligentes com ação antimicrobiana. Assim foi possível por meio de cada rota de síntese avaliar a dispersão e morfologia das AgNPs em diferentes meios dispersivos de Melissa Officinalis, concluindo-se que o mesmo é muito eficiente para estabilização das AgNPs

Meio dispersivo na síntese eficiente de nanopartículas de prata para aplicação em tecidos antimicrobianos

Silver nanoparticles have been increasingly used in industrial applications for a long time. Chemical methods of synthesizing silver nanoparticles can be toxic and expensive. Therefore, many studies have emerged to create ecologically correct synthetic routes that provide good dispersion and stability in the extractive medium. Plant species are investigated for the discovery of a new dispersive medium for silver nanoparticles (AgNPs) synthesized by the green route. AgNPs are disperse in plant extract, by plants available in Brazil. In this work, Melissa Officinalis leaves were used as a dispersive medium of nanoparticles. The characterization techniques used became possible to observe the superficial modifications with the presence of well-dispersed nanostructures, which are fundamental for the production of intelligent textiles with antimicrobial action. Thus, it was possible by means of each synthesis route to evaluate the dispersion and morphology of AgNPs in different dispersive media of Melissa Officinalis, concluding that it is very efficient for the stabilization of AgNPs.As nanopartículas de prata têm sido cada vez mais utilizadas em aplicações industriais há muito tempo. Os métodos químicos de síntese de nanopartículas de prata podem ser tóxicos e caros. Portanto, muitos estudos têm surgido para criar rotas de síntese ecologicamente corretas que forneçam boa dispersão e estabilidade no meio extrativo. Espécies vegetais são investigadas para a descoberta de um novo meio dispersivo para nanopartículas de prata (AgNPs) sintetizadas por via verde. As AgNPs estão dispersas em extrato vegetal, por plantas disponíveis no Brasil. Neste trabalho foram utilizadas folhas de Melissa Officinalis como meio dispersivo das nanopartículas. Através das técnicas de caracterização utilizadas foi possível observar as modificações superficiais com a presença de nanoestruturas bem dispersas, que são fundamentais para a confecção de tecidos inteligentes com ação antimicrobiana. Assim foi possível por meio de cada rota de síntese avaliar a dispersão e morfologia das AgNPs em diferentes meios dispersivos de Melissa Officinalis, concluindo-se que o mesmo é muito eficiente para estabilização das AgNPs

Bionanotechnology in Agriculture: A One Health Approach

Healthy eating habits are one of the requirements for the health of society. In particular, in natura foods are increasingly encouraged, since they have a high concentration of nutrients. However, these foods are often grown in the presence of agrochemicals, such as fertilizers and pesticides. To increase crop productivity and achieve high vigor standards in less time, farmers make excessive use of agrochemicals that generate various economic, environmental, and clinical problems. In this way, bionanotechnology appears as an ally in developing technologies to improve planting conditions, ranging from the health of farmers and consumers to the production of new foods and functional foods. All these improvements are based on the better use of land use in synergy with the lowest generation of environmental impacts and the health of living beings, with a view to the study and production of technologies that take into account the concept of One Health in its processes and products. In this review article, we will address how caring for agriculture can directly influence the quality of the most desired foods in contemporary society, and how new alternatives based on nanotechnology can point to efficient and safe solutions for living beings on our planet

Environmental Implications Associated with the Development of Nanotechnology: From Synthesis to Disposal

Nanotechnology remains under continuous development. The unique, fascinating, and tunable properties of nanomaterials make them interesting for diverse applications in different fields such as medicine, agriculture, and remediation. However, knowledge about the risks associated with nanomaterials is still poorly known and presents variable results. Furthermore, the interaction of nanomaterials with biological systems and the environment still needs to be clarified. Moreover, some issues such as toxicity, bioaccumulation, and physicochemical transformations are found to be dependent on several factors such as size, capping agent, and shape, making the comparisons even more complex. This review presents a comprehensive discussion about the consequences of the use and development of nanomaterials regarding their potential risks to the environment as well as human and animal health. For this purpose, we reviewed the entire production chain from manufacturing, product development, applications, and even product disposal to raise the important implications at each stage. In addition, we present the recent developments in terms of risk management and the recycling of nanomaterials. Furthermore, the advances and limitations in the legislation and characterization of nanomaterials are also discussed

Bionanotechnology and its applications: The plurality of science is fundamental for the search for solutions

Over the years, science and technology have enabled improvement in various sectors of society through the development of products, services, and applications. Despite the tremendous scientific development, it is necessary to understand and pay attention to the environmental, social, and clinical consequences generated by developing a new product and service. Bionanotechnology emerges as a multidisciplinary and transdisciplinary science capable of presenting strategies based on sustainability and biocompatibility with living beings. Therefore, it seeks to solve, with plurality, the emerging problems through manipulating matter at atomic and molecular scales and its application in biological systems. One of the bionanotechnological alternatives that this review will address is the use of nanoparticles synthesized from natural extracts with various applications that can solve emerging problems on the planet, such as the excessive use of agrochemicals, resistant pathogenic microorganisms, the misuse of natural resources and improper disposal of plastics. This review aims to present bionanotechnology as a strategy for sustainable development in emerging problems in health, agriculture, and maintaining biodiversity and population problems

Graphene Oxide (GO) Materials—Applications and Toxicity on Living Organisms and Environment

Graphene-based materials have attracted much attention due to their fascinating properties such as hydrophilicity, high dispersion in aqueous media, robust size, high biocompatibility, and surface functionalization ability due to the presence of functional groups and interactions with biomolecules such as proteins and nucleic acid. Modified methods were developed for safe, direct, inexpensive, and eco-friendly synthesis. However, toxicity to the environment and animal health has been reported, raising concerns about their utilization. This review focuses primarily on the synthesis methods of graphene-based materials already developed and the unique properties that make them so interesting for different applications. Different applications are presented and discussed with particular emphasis on biological fields. Furthermore, antimicrobial potential and the factors that affect this activity are reviewed. Finally, questions related to toxicity to the environment and living organisms are revised by highlighting factors that may interfere with it

Biosynthesis of Nanoparticles Using Plant Extracts and Essential Oils

Plant extracts and essential oils have a wide variety of molecules with potential application in different fields such as medicine, the food industry, and cosmetics. Furthermore, these plant derivatives are widely interested in human and animal health, including potent antitumor, antifungal, anti-inflammatory, and bactericidal activity. Given this diversity, different methodologies were needed to optimize the extraction, purification, and characterization of each class of biomolecules. In addition, these plant products can still be used in the synthesis of nanomaterials to reduce the undesirable effects of conventional synthesis routes based on hazardous/toxic chemical reagents and associate the properties of nanomaterials with those present in extracts and essential oils. Vegetable oils and extracts are chemically complex, and although they are already used in the synthesis of nanomaterials, limited studies have examined which molecules are effectively acting in the synthesis and stabilization of these nanostructures. Similarly, few studies have investigated whether the molecules coating the nanomaterials derived from these extracts and essential oils would bring benefits or somehow reduce their potential activity. This synergistic effect presents a promising field to be further explored. Thus, in this review article, we conducted a comprehensive review addressing the main groups of molecules present in plant extracts and essential oils, their extraction capacity, and available methodologies for their characterization. Moreover, we highlighted the potential of these plant products in the synthesis of different metallic nanomaterials and their antimicrobial capacity. Furthermore, we correlated the extract’s role in antimicrobial activity, considering the potential synergy between molecules from the plant product and the different metallic forms associated with nanomaterials