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1.
Plants (Basel) ; 13(14)2024 Jul 12.
Artigo em Inglês | MEDLINE | ID: mdl-39065449

RESUMO

The increasing demand for organic and biodynamically cultivated fireweeds worldwide has led to a paucity of studies on the effects of solid-phase fermentation and various growth techniques on the quantities of biologically active substances and their antioxidant activity. This experiment was carried out in 2023 at the organic farm in the Jonava district (Safarkos village, Lithuania). The aim of this work was to investigate polyphenols (flavonoids and phenolic acids) and antioxidant activity in fireweed (Chamerion angustifolium (L.) Holub) leaves fermented for 24 and 48 h in solid-phase fermentation and natural, organic, and biodynamic cultivation. Fireweeds have high quantities of polyphenols and strong antioxidant activity. The method employed for determining antioxidant activity was spectrophotometric, for measuring polyphenols, high-performance liquid chromatography (HPLC). Principal component analysis (PCA) was used to determine the relationships between the average content of total polyphenols and antioxidant activity in fermented fireweed leaves grown in different systems. This study's findings demonstrated that the leaves of fireweed cultivated organically had the greatest concentration of total flavonoids, total phenolic acids, and total polyphenols. Comparing the fermentation process effect, the amount of predominant phenolic acids-chlorogenic, p-coumaric, and ellagic acids-as well as the content of oenothein B, during the fermentation process significantly decreased, but the concentration of quercetin-3-O-glucoside after a short time of the fermentation process significantly increased. According to the obtained results, it would be possible to create various health-giving and nature-friendly products from fireweeds.

2.
Environ Sci Technol ; 57(48): 19352-19362, 2023 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-37971896

RESUMO

Quantifying metal bioaccumulation in a sedimentary environment is a valuable line of evidence when evaluating the ecological risks associated with metal-contaminated sediments. However, the precision of bioaccumulation predictions has been hindered by the challenges in accurately modeling metal influx processes. This study focuses on nickel bioaccumulation from sediment and introduces an innovative approach using the isotopically modified bioassay to directly measure nickel assimilation rates in sediment. Tested in sediments spiked with two distinct nickel concentrations, the measured Ni assimilation rates ranged from 35 to 78 ng g-1 h-1 in the Low-Ni treatment and from 96 to 320 ng g-1 h-1 in the High-Ni treatment. Integrating these rates into a biodynamic model yielded predictions of nickel bioaccumulation closely matching the measured results, demonstrating high accuracy with predictions within a factor of 3 for the Low-Ni treatment and within a factor of 1 for the High-Ni treatment. By eliminating the need to model metal uptake from various sources, this streamlined approach provides a reliable method for predicting nickel bioaccumulation in contaminated sediments. This advancement holds promise for linking bioaccumulation with metal toxicity risks in sedimentary environments, enhancing our understanding of metal-contaminated sediment risks and providing valuable insights to support informed decision-making in ecological risk assessment and management.


Assuntos
Níquel , Poluentes Químicos da Água , Sedimentos Geológicos , Bioacumulação , Metais , Bioensaio , Poluentes Químicos da Água/análise
3.
Ergonomics ; : 1-22, 2023 Nov 27.
Artigo em Inglês | MEDLINE | ID: mdl-38009317

RESUMO

Biomechanical models are mathematical representations of human structure. These models are used to analyse joint and injury mechanics and design of prosthetic devices for human body under various conditions. Biomechanical model development involves the integration of knowledge from various fields, including mechanics, biology, physiology, and mathematics. Biomechanical models have become more significant in the healthcare sector as researchers strive to offer better medical supplies and ride comfort. It has uses in automobile and sports science as well, to create human dummies for accident and segmental vibration transmissibility study, improve training routines, and prevent injuries. These biomechanical models might be anything from straightforward lumped parameter models to intricate multi-body models. The virtues, weaknesses, and contemporary uses of lumped parameter modelling and multi body modelling in biomechanical modelling are discussed in this article. Subsequently, emphasised the recent modelling improvements and explored the future direction of biomechanical modelling. Researchers and professionals who wish to apply biomechanical models to comprehend human movement and enhance performance may find this review to be helpful.


Our understanding of how the human body functions, moves, and responds to various situations has greatly improved as a result of the current review. The models play a critical role in the simulation and quantification of interactions between anatomical structures, tissues, and external forces, providing essential information on mobility, function, and damage mechanisms.

4.
Plants (Basel) ; 12(12)2023 Jun 16.
Artigo em Inglês | MEDLINE | ID: mdl-37375970

RESUMO

With the growing global demand for organically and biodynamically grown fireweeds, little research is being conducted on them, and little is known about how the different growing systems and the process of solid-phase fermentation changes biologically active substances and antioxidant activity. Our experiment was conducted in 2022 in Jonava district, Safarkos village, Giedres Nacevicienes organic farm (No. SER-T-19-00910, Lithuania, 55°00'22″ N 24°12'22″ E). This study aimed to investigate the influence of various growing systems (natural, organic, and biodynamic) and technological parameters (different duration: 24, 48 and 72 h) of aerobic solid-phase fermentation on the change of flavonoids, phenolic acids, tannins, carotenoids, chlorophylls, and antioxidant activity. High-performance liquid chromatography (HPLC) for polyphenols, carotenoids, and chlorophylls as well as the spectrophotometric method for antioxidant activity determinations were used. The results of the study showed that different growing systems (natural, organic, and biodynamic) and solid-phase fermentation had a significant effect on the quantitative composition of biologically active substances in the leaves of the fireweeds. According to these data, it would be possible to recommend fermented fireweed leaves grown organically as a source of polyphenols (especially: phenolic acids and flavonoids), leaves grown biodynamically as a source of carotenoids (exceptionally: lutein and beta-carotene) and chlorophyll, and leaves grown naturally for better antioxidant activity.

5.
Sci Total Environ ; 877: 162813, 2023 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-36940747

RESUMO

Microplastics are emerging pollutants that can absorb large amounts of hydrophobic organic contaminants (HOCs). However, no biodynamic model has yet been proposed to estimate their effects on HOC depuration in aquatic organisms, where the HOC concentrations are time-varying. In this work, a microplastic-inclusive biodynamic model was developed to estimate the depuration of HOCs via ingestion of microplastics. Several key parameters of the model were redefined to determine the dynamic HOC concentrations. Through the parameterized model, the relative contributions of dermal and intestinal pathways can be distinguished. Moreover, the model was verified and the vector effect of microplastics was confirmed by studying the depuration of polychlorinated biphenyl (PCB) in Daphnia magna (D. magna) with different sizes of polystyrene (PS) microplastics. The results showed that microplastics contributed to the elimination kinetics of PCBs because of the fugacity gradient between the ingested microplastics and the biota lipids, especially for the less hydrophobic PCBs. The intestinal elimination pathway via microplastics would promote overall PCB elimination, contributing 37-41 % and 29-35 % to the total flux in the 100 nm and 2 µm polystyrene (PS) microplastic suspensions, respectively. Furthermore, the contribution of microplastic uptake to total HOC elimination increased with decreasing microplastic size in water, suggesting that microplastics may protect organisms from HOC risks. In conclusion, this work demonstrated that the proposed biodynamic model is capable of estimating the dynamic depuration of HOCs for aquatic organisms. The results can shed light on a better understanding of the vector effects of microplastics.


Assuntos
Bifenilos Policlorados , Poluentes Químicos da Água , Animais , Microplásticos/metabolismo , Plásticos/análise , Poliestirenos/metabolismo , Daphnia , Bifenilos Policlorados/análise , Organismos Aquáticos/metabolismo , Poluentes Químicos da Água/análise
6.
Ergonomics ; 66(12): 1854-1867, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36656143

RESUMO

Biodynamic modelling of seat-occupant systems can assist in seat comfort design. A finite element (FE) model of the seated human body, including detailed modelling of the lumbar spine, was established to reflect the human response to vibration and biodynamic response of the lumbar spine under whole-body vibration (WBV). The lumbar spine model was established and validated against the in-vitro results and calculated data. The posture of the lumbar spine was adjusted according to the radiological research results, and the adjusted model was combined to establish a FE model of the seated human body. The present seated human model with backrest inclination angles of 10, 20, and 30°, validated by comparing the measured apparent mass and seat-to-lumbar spine transmissibility, was used to calculate the biodynamic response of the lumbar spine with three inclined backrests under WBV. The results showed that the model could characterise the apparent mass, seat-to-lumbar spine transmissibility, and the biodynamic response of the lumbar spine. Practitioner summary: Biodynamic models can represent dynamic characteristics of the human body exposed to vibration and assist in seat comfort design. The three-dimensional FE model of the human body can be used to explore the human response to vibration and the biodynamic response of the lumbar spine under WBV.


Assuntos
Corpo Humano , Vibração , Humanos , Vibração/efeitos adversos , Análise de Elementos Finitos , Fenômenos Biomecânicos , Vértebras Lombares
7.
Med Biol Eng Comput ; 61(1): 271-284, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36385615

RESUMO

Patients with adolescent idiopathic scoliosis suffer severe health issues. The unclear dynamic biomechanical characteristics of scoliosis were needed to be explored to improve the prevention and treatment in clinics. Validated 3D finite element (FE) models of thoracolumbosacral spine (T1-S1) both with and without scoliosis were developed from computed tomography (CT) images. Modal and harmonic analyses were performed to investigate the biomechanical responses of the spinal models to vibration. Resonant frequencies of the scoliotic model were lower than those of the model without scoliosis. Peak amplitudes occurred at vibrational frequencies close to the modal resonant frequencies, which caused the deformed thoracic segment in scoliosis suffered the maximum amplitude. The stresses on vertebrae and intervertebral discs in the scoliotic model derived from vibrations were significantly larger than those in the non-scoliosis model, and heterogeneously concentrated on the scoliotic thoracic segment. In conclusion, the scoliotic spine in the patients with Lenke 1BN scoliosis is more prone to injuries than the non-scoliotic spine while vibrating. Scoliotic thoracic segments in patients with Lenke 1BN scoliosis were the more vulnerable and sensitive component of the T1-S1 spine to vibration than lumbar spines. This study suggested that vibration would impair the scoliotic spines, and patients with Lenke 1BN scoliosis should avoid exposure to vibration, especially the low-frequency vibration.


Assuntos
Disco Intervertebral , Cifose , Escoliose , Humanos , Adolescente , Vibração/uso terapêutico , Vértebras Lombares , Vértebras Torácicas
8.
Front Endocrinol (Lausanne) ; 13: 1043366, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36568081

RESUMO

Background and purpose: Maternal circadian rhythms are important for maintaining maternal and fetal homeostasis. The maternal circadian system coordinates the internal clock of the fetus with environmental lighting conditions via the melatonin signal. The intensity and wavelength of daylight influence nocturnal melatonin production. This study aims to evaluate the effect of environmental lighting conditions on melatonin production in pregnant women with reduced mobility during hospitalization. Methods: We installed a human-centric lighting system with biodynamic effects (BDL, biodynamic lighting) in the patient rooms. The pregnant women in the patient rooms with standard indoor conditions served as a control group. The illuminance (lux) and dose of effective circadian irradiation (Hec) were recorded every 10 seconds by light dosimeters (Lucerne University, Switzerland) attached to the patients` clothing. Results: We analyzed the illuminance status of 47 pregnant women with a median (IQR) gestational age of 29.9 (25.4-32.3) weeks of gestation. The median illuminance in the control group was significantly lower (p<0.05) than in the BDL group in the morning and afternoon from day 1 to 5. BDL patients had a significantly higher effective circadian irradiation in the morning. The effective circadian irradiation showed a significant daily rhythm only in the BDL group. The BDL group had a significantly higher melatonin production on day 3 (p=0.006) and day 5 (p=0.012) than the control group median (IQR) nocturnal 6-Sulfatoxymelatonin excretion 15840 (10140-22160) ng/12h vs. 6141 (2080-11328) ng/12h on day 3 and 18780 (11320-23562) ng/12h vs. 6380 (3500-17600) ng/12h on day 5). Conclusion: We have demonstrated that dramatically altered lighting conditions of hospitalized pregnant women may be optimized by installing biodynamic lighting systems in the patient rooms resulting in the maintenance of nocturnal melatonin production in pregnant women.


Assuntos
Iluminação , Melatonina , Humanos , Feminino , Gravidez , Lactente , Gestantes , Projetos Piloto , Luz , Estudos Prospectivos , Hospitalização
9.
Front Neurosci ; 16: 745138, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35712451

RESUMO

Introduction: Hildegard of Bingen (1098-1179) interpreted the origins of chronic disease highlighting and anticipating, although only in a limited fashion, the importance that complex interactions among numerous genetic, internal milieu and external environmental factors have in determining the disease phenotype. Today, we recognize those factors, capable of mediating the transmission of messages between human body and environment and vice versa, as biodynamic interfaces. Aim: We analyzed, in the light of modern scientific evidence, Hildegard of Bingen's medical approach and her original humoral theory in order to identify possible insights included in her medicine that could be referred to in the context of modern evidence-based medicine. In particular, the abbess's humoral theory suggests the identification of biodynamic interfaces with sex hormones and their receptors. Findings: We found that the Hildegardian holistic vision of the organism-environment relationship can actually represent a visionary approach to modern endocrinology and that sex hormones, in particular estrogens, could represent an example of a biodynamic interface. Estrogen receptors are found in regions of the brain involved in emotional and cognitive regulation, controlling the molecular mechanism of brain function. Estrogen receptors are involved in the regulation of the hypothalamic-pituitary-adrenal axis and in the epigenetic regulation of responses to physiological, social, and hormonal stimuli. Furthermore, estrogen affects gene methylation on its own and related receptor promoters in discrete regions of the developing brain. This scenario was strikingly perceived by the abbess in the XIIth century, and depicted as a complex interplay among different humors and flegmata that she recognized to be sex specific and environmentally regulated. Viewpoint: Considering the function played by hormones, analyzed through the last scientific evidence, and scientific literature on biodynamic interfaces, we could suggest Hildegardian insights and theories as the first attempt to describe the modern holistic, sex-based medicine. Conclusion: Hildegard anticipated a concept of pathogenesis that sees a central role for endocrinology in sex-specific disease. Furthermore, estrogens and estrogen receptors could represent a good example of molecular interfaces capable of modulating the interaction between the organism internal milieu and the environmental factors.

10.
Environ Toxicol Chem ; 41(3): 726-738, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-34913522

RESUMO

Treatment wetlands utilize various physical and biological processes to reduce levels of organic contaminants, metals, bacteria, and suspended solids. Silver nanoparticles (AgNPs) are one type of contaminant that can enter treatment wetlands and impact the overall treatment efficacy. Grazing by filter-feeding zooplankton, such as Daphnia magna, is critical to treatment wetland functioning; but the effects of AgNPs on zooplankton are not fully understood, especially at environmentally relevant concentrations. We characterized the bioaccumulation kinetics of dissolved and nanoparticulate (citrate-coated) 109 Ag in D. magna exposed to environmentally relevant 109 Ag concentrations (i.e., 0.2-23 nmol L-1 Ag) using a stable isotope as a tracer of Ag. Both aqueous and nanoparticulate forms of 109 Ag were bioavailable to D. magna after exposure. Water chemistry affected 109 Ag influx from 109 AgNP but not from 109 AgNO3 . Silver retention was greater for citrate-coated 109 AgNP than dissolved 109 Ag, indicating a greater potential for bioaccumulation from nanoparticulate Ag. Feeding inhibition was observed at higher dietary 109 Ag concentrations, which could lead to reduced treatment wetland performance. Our results illustrate the importance of using environmentally relevant concentrations and media compositions when predicting Ag bioaccumulation and provide insight into potential effects on filter feeders critical to the function of treatment wetlands. Environ Toxicol Chem 2022;41:726-738. © 2021 SETAC.


Assuntos
Nanopartículas Metálicas , Poluentes Químicos da Água , Animais , Bioacumulação , Ácido Cítrico/farmacologia , Daphnia , Íons , Nanopartículas Metálicas/química , Nanopartículas Metálicas/toxicidade , Prata/química , Prata/toxicidade , Nitrato de Prata , Água , Poluentes Químicos da Água/toxicidade
11.
Ergonomics ; 65(4): 546-560, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-34503399

RESUMO

The biodynamic response of 12 subjects to single-axis vertical and multi-axis vertical, lateral and roll excitations was studied to advance understanding of the biodynamics. Different from using single-input and single-output (SISO) method, the apparent masses with multiple inputs were estimated by multi-input and single-output (MISO) method, whose advantage was discussed. By studying the relationship between resonance frequencies and excitation magnitudes, the primary resonance frequencies of vertical apparent masses on seat pan and backrest and fore-and-aft cross-axis apparent masses from vertical acceleration on seat pan had a negative correlation with the weighted root-sum-of-square (r.s.s.) value of excitation magnitudes. Weighting factors of lateral and vertical magnitudes in r.s.s. value were comparable and were much larger than that of roll magnitude. However, the nonlinearity in the apparent mass was more significant or significant only under low r.s.s. value. MISO method appeared more suitable for estimating apparent masses with multiple inputs than SISO method. Practitioner Summary: This paper experimentally studies the dependence of the resonance frequencies in the apparent masses of seated human body on the vibration magnitudes to advance understanding of the biodynamics. The sensitivities of resonance frequencies to lateral and vertical magnitudes are comparable, and much higher than that to roll magnitude. Abbreviations: MISO: multi-input and single-output; SISO: single-input and single-output; r.s.s.: root-sum-of-square; SD: standard deviation; ISVR: Institute of Sound and Vibration Research; r.m.s.: root-mean-square; FRF: frequency response function.


Assuntos
Corpo Humano , Vibração , Fenômenos Biomecânicos/fisiologia , Humanos , Postura/fisiologia , Postura Sentada
12.
Saúde debate ; 46(spe2): 149-162, 2022. tab
Artigo em Português | LILACS-Express | LILACS | ID: biblio-1390387

RESUMO

RESUMO A formação-ação no contexto da saúde coletiva pode ser estratégica para a resistência a esse modelo de agronegócio deletério e excludente, pois engendra um conjunto de práticas que modificam a maneira de sentir, pensar e agir em relação aos usos da terra; e fortalecem o movimento agroecológico, as práticas integrativas complementares de cuidado e as formas solidárias, democráticas e inclusivas de se relacionar com a natureza. A formação-ação: Cultivo Biodinâmico de Plantas Medicinais em Agroflorestas na Promoção de Territórios Saudáveis e Sustentáveis no Distrito Federal, nasce da confluência de outras experiências associada à necessidade de construir estratégias para a formação de profissionais e comunidades relacionados com ações em saúde para a promoção de territórios saudáveis e sustentáveis, constituído de bases teórico-metodológicos que envolvem educandos, educadores e comunidades, e articula diferentes categorias de análise para a construção e ressignificação do conhecimento, contando com ferramentas pedagógico-metodológicas baseadas na Pedagogia da Alternância e organizadas em tempos distintos do processo ensino-aprendizagem. A matriz curricular organiza-se em dois módulos: Desenvolvimento, Ciência e Saúde; e Agrofloresta, Arranjos Produtivos e Saúde. A formação é um meio de transformar a realidade local, de promover a saúde, de dialogar com as comunidades e de reconhecer os territórios.


ABSTRACT Training-action, in the context of collective health, can be strategic for resisting this harmful and exclusive agribusiness model, as it engenders a set of practices that modify not only the way of feeling, thinking and acting in relation to land uses, and they strengthen the agroecological movement, complementary integrative care practices and the solidary, democratic, and inclusive ways of relating to nature. Training-action: Biodynamic Cultivation of Medicinal Plants in Agroforestry in the Promotion of Healthy and Sustainable Territories in the Federal District arises from the confluence of other experiences associated with the need to build strategies for the training of professionals and communities related to health actions to promote healthy and sustainable territories, constituted by theoretical-methodological bases that involve students, educators, and communities, and articulates different categories of analysis for the construction and reframing of knowledge, having pedagogical-methodological tools based on the Pedagogy of Alternation and organized at different times of the teaching-learning process. The curriculum matrix has 2 modules: Development, Science, and Health; and Agroforestry, Productive Arrangements, and Health. Training is a means to transform the local reality, to promote health, to dialogue with communities, and to recognize the territories.

13.
Artigo em Inglês | MEDLINE | ID: mdl-34682455

RESUMO

BACKGROUND: Multicomponent training has considerable adherence among older populations, but there is a lack of literature on the benefits of this training on older people's posture. Literature also lacks stretching protocols that work the body in an integrated/unified way and respect the principle of individuality in exercise training. We evaluated the effect of a multicomponent training protocol combined or not with flexibility training in improving the posture and quality of movement in physically inactive older women, according to a score lower than 9.11 in the Modified Baecke Questionnaire for the Elderly (MBQE). METHODS: 142 participants were evaluated and randomized in three training groups: multicomponent training (MT = 52), multicomponent and flexibility training (MFT = 43), and a control group (CG = 47). We evaluated joint amplitude using goniometry, flexibility with sit and reach and hands behind the back tests, quality of movement with the functional movement screen, and posture using biophotogammetry. RESULTS: The MFT group had 15 parameters-flexibility and posture-with a very large effect size (ES > 1.30) and nine with average ES (0.50-0.79). MT presented two variables with large ES (0.80-1.25) and seven with average ES. CG presented three variables with high ES and five with average ES. Both interventions improved the quality of movement. CONCLUSIONS: These results demonstrate that 14 weeks of multicomponent and flexibility training in a group intervention can improve flexibility and posture levels in physically inactive older women.


Assuntos
Exercício Físico , Postura , Idoso , Terapia por Exercício , Feminino , Humanos , Movimento , Equilíbrio Postural
14.
Foods ; 10(8)2021 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-34441671

RESUMO

The aim of this study was to propose a methodological approach to evaluate the impact of the organic, biodynamic, and conventional production processes on the intrinsic and perceived quality of a typical wine. For this purpose, fourteen commercial Chianti DOCG wines from the 2016 harvest were selected based on the type of production management. A survey was set up to get winemaking information from the estate's producer of the wines to estimate the carbon dioxide production under the three types of management. The eligibility, identity, and style properties (the intrinsic quality) of the wines were defined. A group of 45 experts evaluated the differences between wines by the Napping test and rated their typicality (perceived quality). The organic and biodynamic management showed a lower level of estimated values of carbon dioxide production. The overall statistical elaboration of the chemical and sensory data highlighted that the registered differences of the intrinsic, perceived quality, and typicality level of the respective wines, did not depend on the type of management. The comparison of the three kinds of wine by SIMCA modeling, put in evidence that the conventional ones showed a greater homogeneity regarding chemical composition, sensory characteristics, and typicality.

15.
J Biomech ; 127: 110666, 2021 10 11.
Artigo em Inglês | MEDLINE | ID: mdl-34371474

RESUMO

Underwater explosion (UNDEX) can cause severe damage to hull structure, equipment and human. In this paper, the effect of UNDEX load, including shock wave and bubble pulsation, on seated human response was investigated. The incident pressure of non-contact UNDEX was calculated. A lumped parameter interaction model of the ship structure (single-deck and multi-deck) and seated human was created based on the Taylor's theory and its veracity was verified. The results indicated that the pelvis, which is in direct contact with the structure, is the most vulnerable part of seated human when suffered impact. The shock wave and bubble pulsation had equal destructive potential to upper torso, viscera and head. The low pass filtering feature of multi-deck configuration may magnify the human response caused by the upper deck motion. The energy carried by the low and high frequency component was the dominant factors to human injury and the broadband protection to human shock isolation design is essential.


Assuntos
Navios , Postura Sentada , Humanos , Movimento (Física) , Sujeitos da Pesquisa , Tronco
16.
Nanotoxicology ; 15(5): 673-689, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-34137642

RESUMO

The use of copper oxide (CuO) NPs results in the release of these particles into the aquatic environment. Here, the particles settle out and accumulate in the sediment. However, little is known about the biodynamics of sediment-associated NPs in benthic organisms. We compared the toxicity and biodynamics of CuO NPs (7 nm) and dissolved Cu (CuCl2) in the sediment-dwelling oligochaete, Tubifex tubifex, to gain insights into the relative importance of metal form (CuCl2 vs CuO NPs) and exposure route (water vs sediment). Isotopically enriched 65Cu was used as a tracer to distinguish background from newly accumulated 65Cu in worms. For each exposure route, we conducted three experiments: one uptake, one elimination, and one longer-term net accumulation experiment to parameterize uptake and elimination of 65CuCl2 and 65CuO NPs in T. tubifex. 65Cu accumulation was detected for both 65CuCl2 and 65CuO NPs regardless of whether T. tubifex were exposed in sediment- or water-only setups. Water exposures to 65CuCl2 resulted in tail trauma whereas limited effects were seen for sediment exposures or exposures to 65CuO NPs via either exposure route. Uptake rate constants and accumulation of 65Cu in T. tubifex were higher following 65CuCl2 exposure than 65CuO NPs, in water, but not in sediment. Thus, the relative importance of exposure route and Cu form for uptake dynamics is not straightforward suggesting that findings on bioaccumulation and toxicity in water exposures cannot be directly extrapolated to sediment.


Assuntos
Cobre , Nanopartículas Metálicas , Poluentes Químicos da Água , Cobre/análise , Cobre/toxicidade , Sedimentos Geológicos , Nanopartículas Metálicas/toxicidade , Água , Poluentes Químicos da Água/análise , Poluentes Químicos da Água/toxicidade
17.
Foods ; 10(1)2021 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-33430151

RESUMO

From the ancient times, when wine/oenos was described as "Wine, the benevolent demon" by ancient Greek gastronomist and philosopher Athinaios in "Dipnosofistes", to modern days, the craft has seen significant fruition. The wine industry has evolved over time, and more so recently, to encompass many different subsets, one of which is the organic wine market. The organic wine industry has grown in recent years, especially in California. This rapid gain in interest has resulted in the evolution of several subsets, including biodynamic, natural, and clean wine. While biodynamic and natural wine, function more as a fulfillment of niche markets, clean wine may provide benefits for consumers that otherwise suffer from side effects of wine consumption. Low sulfite levels and lack of histamines in clean wine plausibly decrease headaches and adverse effects some consumers experience when drinking wine. An overview of the organic wine industry and its evolution with potential contributions to consumers, with an emphasis on clean wine, is discussed herein.

18.
Carbon Balance Manag ; 15(1): 23, 2020 Nov 03.
Artigo em Inglês | MEDLINE | ID: mdl-33141918

RESUMO

BACKGROUND: Organic viticulture can generate a range of ecosystem services including supporting biodiversity, reducing the use of conventional pesticides and fertilizers, and mitigating greenhouse gas emissions through long-term carbon (C) storage. Here we focused on aboveground C storage rates and accumulation using a one-year increment analysis applied across different winegrape varietals and different-aged vineyard blocks. This produced a chronosequence of C storage rates over what is roughly the productive lifespan of most vines (aged 2-30 years). To our knowledge, this study provides the first estimate of C storage rates in the woody biomass of vines. Additionally, we assessed C storage in wildland buffers and adjacent oak-dominated habitats over a 9-year period. RESULTS: Carbon storage averaged 6.5 Mg/Ha in vines. We found the average annual increase in woody C storage was 43% by mass. Variation correlated most strongly with vine age, where the younger the vine, the greater the relative increase in annual C. Decreases in C increment rates with vine age were more than offset by the greater overall biomass of older vines, such that C on the landscape continued to increase over the life of the vines at 18.5% per year on average. Varietal did not significantly affect storage rates or total C stored. Carbon storage averaged 81.7 Mg/Ha in native perennial buffer vegetation; we found an 11% increase in mass over 9 years for oak woodlands and savannas. CONCLUSIONS: Despite a decrease in the annual rate of C accumulation as vines age, we found a net increase in aboveground C in the woody biomass of vines. The results indicate the positive role that older vines play in on-farm (vineyard) C and overall aboveground accumulation rates. Additionally, we found that the conservation of native perennial vegetation as vineyard buffers and edge habitats contributes substantially to overall C stores. We recommend that future research consider longer time horizons for increment analysis, as this should improve the precision of C accumulation rate estimates, including in belowground (i.e., soil) reservoirs.

19.
Cogn Neurodyn ; 14(5): 579-590, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33014174

RESUMO

"Systems neuroergonomics" (Mau, J. In: R. Wang and X. Pan, editors, Advances in Cognitive Neurodynamics (V), chapter 59, pages 431-437, Springer Science+Business Media, Singapore, 2016) showed a separation of human-body system's functional organization from its cellular material in order to open a holistic perspective that can comprise all body functions. This was achieved with a strictly hierarchical structure in drill-down from system's functional whole to base functional elements. Implied multi-scale functional dynamics with coherent up-scaling were mathematically described in an axiomatic way, but the daily wake/sleep dynamics cover mainly anticipated functional challenges. Here, the theory is expanded to permit "functional learning" in the sense of adjustment of functional capacities to meet higher demand. "Functional aging" as a whole-body frailty is derived from biodynamic entropy that eventually drives the living to meet its inevitable destiny, death. The ages at which frailty begins to dominate can currently be obtained only from official life tables as population averages and are different for men and women, accordingly. The objective is to develop a mathematical theory in medicine from an axiomatic approach to phenomenological biodynamics, in which cognition is viewed as an embodied activity.

20.
Bioessays ; 42(11): e2000017, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32851694

RESUMO

The environment impacts human health in profound ways, yet few theories define the form of the relationship between human physiology and the environment. It is conjectured that such complex systems cannot interact directly, but rather their interaction requires the formation of an intermediary "interface." This position contrasts with current epidemiological constructs of causation, which implicitly assume that two complex systems transfer information directly while remaining separate entities. Further, it is contended that dynamic, process-based interfaces incorporate components from all the interacting systems but exhibit operational independence. This property has many consequences, the foremost being that characteristics of the interface cannot be fully resolved by only studying the systems involved in the interaction. The interface itself must be the subject of inquiry. Without refocusing the attention on biodynamic interfaces, how the environment impacts health cannot be discerned. Also see the video abstract here https://youtu.be/XeyjeZeyo4o.


Assuntos
Interação Gene-Ambiente , Humanos
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