Zweifach-Fung Microfluidic Device for Efficient Microparticle Separation: Cost-Effective Fabrication Using CO2 Laser-Ablated PMMA.

Microfluidic separators play a pivotal role in the biomedical and chemical industries by enabling precise fluid manipulations. Traditional fabrication of these devices typically requires costly cleanroom facilities, which limits their broader application. This study introduces a novel microfluidic device that leverages the passive Zweifach-Fung principle to overcome these financial barriers. Through Lagrangian computational simulations, we optimized an eleven-channel Zweifach-Fung configuration that achieved a perfect 100% recall rate for particles following a specified normal distribution. Experimental evaluations determined 2 mL/h as the optimal total flow rate (TFR), under which the device showcased exceptional performance enhancements in precision and recall for micrometer-sized particles, achieving an overall accuracy of 94% ± 3%. Fabricated using a cost-effective, non-cleanroom method, this approach represents a significant shift from conventional practices, dramatically reducing production costs while maintaining high operational efficacy. The cost of each chip is less than USD 0.90 cents and the manufacturing process takes only 15 min. The development of this device not only makes microfluidic technology more accessible but also sets a new standard for future advancements in the field.

Práticas de cuidado para a construção do Comum / Care practices to build the Common

Resumo Este artigo apresenta trecho de uma pesquisa realizada a partir de experiência cartográfica no Laboratório Procomum, em Santos-SP, e procura estruturar uma reflexão sobre as práticas de cuidado integral para a construção do Comum. O texto apresenta um recorte bibliográfico e teórico sobre o Comum, discute o que são os Laboratórios de Inovação Cidadã e traz uma perspectiva teórica sobre corpo e cuidado. A metodologia utilizada foi uma cartografia, construída a partir de experiências, vivências, relatos, memórias, conversas e narrativas. O material foi organizado em eixos do que seria um "dispositivo-sonho" para o cuidado: feminino, gestão, práticas, território e emergência. Como resultado, a pesquisa encontra o cuidado corporificado como uma prática coletiva de escuta, troca, redes, gesto menor e presença.

Abstract This study describes an excerpt from a research carried out from a cartographic experience at the Procomum Laboratory in Santos and seeks to structure a reflection on comprehensive care practices to construct the Common. It offers a bibliographic and theoretical excerpt about the Common, characterizes Citizen Innovation Laboratories, and brings a theoretical perspective on Body and Care. A cartography built from experiences, reports, memories, conversations, and narratives was used as its methodology. The material was organized into axes of what would be a "dream device" for care: the feminine, management, practices, territory, and emergency. As its result, this research finds care as embodied as a collective practice of listening, exchange, networks, minor gestures, and presence.

Inhibition of the Human Neuronal Sodium Channel Nav1.9 by Arachidonyl-2-Chloroethylamide, An Analogue of Anandamide in a hNav1.9/rNav1.4 Chimera, An Experimental and in Silico Study.

Cannabinoids regulate analgesia, which has aroused much interest in identifying new pharmacological therapies in the management of refractory pain. Voltage-gated Na+ channels (Navs) play an important role in inflammatory and neuropathic pain. In particular, Nav1.9 is involved in nociception and the understanding of its pharmacology has lagged behind because it is difficult to express in heterologous systems. Here, we utilized the chimeric channel hNav1.9_C4, that comprises the extracellular and transmembrane domains of hNav1.9, co-expressed with the ß1 subunit on CHO-K1 cells to characterize the electrophysiological effects of ACEA, a synthetic surrogate of the endogenous cannabinoid anandamide. ACEA induced a tonic block, decelerated the fast inactivation, markedly shifted steady-state inactivation in the hyperpolarized direction, decreasing the window current and showed use-dependent block, with a high affinity for the inactivated state (ki = 0.84 µM). Thus, we argue that ACEA possess a local anaesthetic-like profile. To provide a mechanistic understanding of its mode of action at the molecular level, we combined induced fit docking with Monte Carlo simulations and electrostatic complementarity. In agreement with the experimental evidence, our computer simulations revealed that ACEA binds Tyr1599 of the local anaesthetics binding site of the hNav1.9, contacting residues that bind cannabinol (CBD) in the NavMs channel. ACEA adopted a conformation remarkably similar to the crystallographic conformation of anandamide on a non-homologous protein, obstructing the Na+ permeation pathway below the selectivity filter to occupy a highly conserved binding pocket at the intracellular side. These results describe a mechanism of action, possibly involved in cannabinoid analgesia.

A Methodology for Designing Smart Urban Living Labs from the University for the Cities of the Future.

Cities have high demand and limited availability of water and energy, so it is necessary to have adequate technologies to make efficient use of these resources and to be able to generate them. This research focuses on developing and executing a methodology for an urban living lab vocation identification for a new water and energy self-sufficient university building. The methods employed were constructing a technological roadmap to identify global trends and select the technologies and practices to be implemented in the building. Among the chosen technologies were those for capturing and using rain and residual water, the generation of solar energy, and water and energy generation and consumption monitoring. This building works as a living laboratory since the operation and monitoring generate knowledge and innovation through students and research groups that develop projects. The insights gained from this study may help other efforts to avoid pitfalls and better design smart living labs and off-grid buildings.

Alpha-Defensin Is Not Superior to Traditional Diagnostic Methods for Detection of Periprosthetic Joint Infection in Total Hip Arthroplasty and Total Knee Arthroplasty Patients.

BACKGROUND: Synovial fluid alpha-defensin (AD) may improve diagnostic accuracy of periprosthetic joint infection (PJI) following total knee (TKA) and hip (THA) arthroplasty but is only available as send-out test. This study evaluated laboratory result accuracy between send-out test vs hospital labs and if AD made a difference in treatment plan. METHODS: A retrospective review was performed of 152 consecutive patients with a TKA or THA joint aspiration for painful or clinically concerning joint. Synovial fluid was sent to our institution (hospital-based labs, HBL) and send-out immunoassay laboratory (Synovasure). Patients were scored with specific criteria from validated scoring system for PJI using HBL and Synovasure results. The score with and without AD test was compared to determine if AD impacted patient management. RESULTS: Overall, there was strong agreement between institutions for PJI diagnosis (Cohen's kappa score 0.96). Twenty-nine patients had PJI diagnosis (score ≥6), of which 28 (97%) had positive AD with 1 false-negative result. Sixty-three patients had inconclusive score (between 2 and 5) and 60 patients had negative PJI diagnosis (score ≤1). Of these patients, 5 underwent surgery for infection. Two patients had surgery for positive AD, 2 for positive culture, and 1 because of elevated HBL results. The AD test changed the PJI diagnosis and influenced decision for surgery in only 1.3% (2/152) of patients. CONCLUSION: Minimal differences were found in laboratory values between institutions. The addition of AD may be useful in cases of equivocal laboratory results but does not appear to be necessary for routine diagnosis of PJI after TKA/THA. LEVEL EVIDENCE: Level III.

Living Senior Labs, ecosistemas de co-creación e innovación abierta con personas mayores: revisión sistemática de la literatura en Ciencias Sociales / Living Senior Labs, co-criação e ecossistemas de inovação aberta com idosos: revisão sistemática da literatura em Ciências Sociais / Living Senior Labs, ecosystems of co-creation and open innovation with older people: a systematic review on Social Science literature

Los Living Labs son experiencias colaborativas que buscan implicar a la ciudadanía en la gobernanza científica y la evaluación de tecnologías. A pesar de su interés, se sabe muy poco sobre estas comunidades, su funcionamiento, tipología y características. Por ello, se realizó una revisión sistemática de la literatura sobre de un tipo particular de Living Lab, orientado hacia las personas mayores: los Living Senior Labs. A partir de una búsqueda general en las principales bases de datos científicas (WOS y Scopus), y de la aplicación de criterios de inclusión preestablecidos tras la primera selección quedaron finalmente seleccionados 19 estudios sobre Senior Labs (2010 y 2021). Los resultados proporcionan un mejor conocimiento de este tipo de ecosistemas y crean una base firme para avanzar en el conocimiento de este campo. (AU)

Os Living Labs são experiências colaborativas que procuram envolver os cidadãos na governança científica e na avaliação tecnológica. Apesar de seu interesse, muito pouco se sabe sobre essas comunidades, seu funcionamento, tipologia e características. Portanto, foi realizada uma revisão sistemática da literatura sobre um tipo particular de Living Lab, orientado para os idosos: os Living Senior Labs. Com base em uma pesquisa geral nos principais bancos de dados científicos (WOS e Scopus) e na aplicação de critérios de inclusão pré-estabelecidos, foram selecionados 19 estudos sobre os Senior Labs (2010 a 2021). Os resultados proporcionam uma melhor compreensão deste tipo de ecossistema e criam uma base firme para o avanço do conhecimento neste campo. (AU)

Living Labs are collaborative experiences that seek to involve citizens in scientific governance and technology assessment. In spite of their interest, very little is known about these communities, their functioning, typology and characteristics. Thus, a systematic literature review was carried out about a particular type of Living Lab, oriented towards the elderly: Living Senior Labs. Based on a general search in the main scientific databases (WOS and Scopus), and the application of pre-established inclusion criteria, 19 studies about Senior Labs were selected (2010 to 2021). The results provide a more comprehensive understanding of this type of ecosystem and create a strong foundation for progress in the knowledge of this area. (AU)

Diretrizes de uma política para a rede de laboratórios de Saúde Pública no Estado de São Paulo / Bases for planning a network of Public Health Laboratories for the State of Sao Paulo

Após breve histórico, são discutidas as atribuições da rede de laboratórios de Saúde 'Pública do Estado de São Paulo e oferecidos subsídios para o seu planejamento e organização, além de critérios para sua avaliação (AU).