bluuebunny/crossref_metadata_2025 huggingface dataset:
Exploring Construction Workers' Experiences of Stress in the Work Environment in Aotearoa/New Zealand
Authors:   , Kaur Jasmeen
Published: April 2024

The construction industry is highly demanding, it has impacts on workers’ psychological, physiological and physical health; such as stress, cardiovascular diseases and injuries. This research aims to explore the experiences of stress for construction workers in their work environment in Aotearoa/New Zealand, and its impact on their health and wellbeing. This research had six participants from two construction organisations in Aotearoa/New Zealand. The construction organisations were recruited through the networking and the snowballing method. The participants were recruited through email from one construction organisation and through a toolbox talk from the other. This research used mixed-methods with a personal construct paradigm to underpin the methods. These methods used were the Copenhagen Psychosocial Questionnaire (COPSOQ) and semi-structured interviews. The COPSOQ was used as a foundation for the semi-structured interviews which provided the main findings in this research.

The findings of this research addressed the gaps in the previous literature. The findings specifically identified seven themes including social dynamics, work expectations, job meaningfulness, autonomy at work, hazards at work, health and wellbeing, and life factors outside of work. Under the seven themes participants highlighted unique perspectives that shaped their subjective experiences associated with stress. These subjective experiences were influenced by factors including cultural background, childhood, and past experiences in personal and work life context. In certain cases, these experiences impacted overall quality of life and wellbeing in participants. This research addresses the practical implications, limitations and future directions of this project in the construction industry. For example, practical implications of this research included tailoring psychological support interventions to consider subjectivity of the experiences in construction workers, limitations of this research included time constraints, and future directions encouraged addressing the limitations of this research. This can promote interventions to manage the negative impacts of subjective experiences in association with stress in the construction industry.
Evaluation of Phytochemical Analysis and Total Phenol Content of Proso Millet and Barnyard Millet
Authors: Ramadoss Peera Priya , Shanmugam Kirubanandan
Published: April 2024

Whole grains of proso and barnyard millets were sequentially extracted using different solvents (hexane, chloroform, ethyl acetate, and methanol). Phytochemical analysis was performed qualitatively, and the total phenolic content in the extracts of proso and barnyard millets was quantified. Alkaloids and cardiac glycosides were identified in all solvent extracts of both millets. Anthraquinone and glycosides yielded negative results in all solvent extracts of both millets. Among all the solvent extracts, methanol extracts of proso and barnyard millets showed the presence of major compounds such as flavonoids, terpenoids, amino acids, tannins, and phenolics compounds. The maximum amount of phenols was found in methanolic extracts of proso and barnyard millets (0.669 ± 0.003 and 0.625 ± 0.003), followed by the chloroform extract of proso and barnyard millets (0.284 ± 0.002 and 0.257 ± 0.003). The minimum amount of phenolics was found in the acetone extract of proso and barnyard millets. The methanol extract of both millets showed the presence of major compounds with high phenolic content.
Study on the Application Value of Liver Function and Serological Index Levels in the Diagnosis of Fatty Liver
Authors: Lu Gaopeng
Published: April 2024

Objective: To explore the application value of liver function and serological index detection in diagnosing fatty liver. Methods: Ninety patients with fatty liver disease (disease group) and ninety healthy subjects (healthy group) were selected as the subjects of this study. They all underwent liver function index testing and serological index testing. Test results were compared, and the diagnostic accuracy of single and combined tests was evaluated. Results: Liver function indicators of patients in the disease group were higher than those in the healthy group, with severe patients exhibiting higher levels than moderate patients and mild patients (P < 0.05). Serological indicators in patients in the disease group were higher than those in the healthy group, with severe patients showing higher levels than moderate patients and mild patients (P < 0.05). The diagnostic accuracy of liver function index testing was higher than that of serological index testing, and the accuracy of combined testing was higher than that of single testing (P < 0.05). Conclusion: In diagnosing fatty liver, combining liver function testing and serological testing enables the initial diagnosis of the disease and facilitates the accurate assessment of its severity.
Новые гетеролигандные октаэдрические кластерные комплексы молибдена и вольфрама
Authors: Пронин А.С. , Сухих Т.С. , Миронов Ю.В.
Published: April 2024

Реакцией (Bu4N)2[{M6I8}I6] (M = Mo, W) с NaCN в этаноле и последующей перекристаллизацией из водно-этанольного раствора получены кластерные комплексы состава (Bu4N)2[{Mo6I8}(CN)5(OEt)]·2H2O и (Bu4N)2[{W6I8}(CN)4(OEt)2]·H2O·EtOH. Строение обоих соединений установлено методом РСА. Внешнее лигандное окружение анионов содержит лиганды CN– и OEt–. Поведение комплексов в водном растворе исследовано методом электронной спектроскопии.
Propuesta y análisis de deflexión de losas aligeradas con arreglo metálico tridimensional embebido
Authors: Hernández-Pérez Javier , Jiménez-Montoya Adán , Pascual-Francisco Juan Benito , Contreras-Ramírez Juan Carlos , López-Segundo Néstor , Miramar-Mena Teresa
Published: April 2024

En este trabajo se evalúa la deflexión de dos propuestas de losa aligerada con peralte de 50 mm y estructura tridimensional embebida. Se proponen dos configuraciones de estructura (piramidal y cúbica) de varilla de acero grado 6000 de 4mm de diámetro. En una primera etapa, se evalúa la deflexión en losas convencionales mediante un método analítico y, posteriormente, se determina la deflexión en este tipo de losas mediante el método de elementos finitos, usando el software ANSYS.  A partir de la validación de las simulaciones con el software, se procedió a realizar las mismas simulaciones ahora en las losas con estructura tridimensional. Los resultados obtenidos indican que las estructuras tridimensionales proveen más resistencia ante la deflexión en comparación con un armado de acero convencional. Además, se encontró que la estructura cúbica es la más resistente ante la flexión. Se discute la posible aplicación de losas con armado tridimensional para optimización de materiales mediante disminución del peralte en vivienda.
Diseño de un intercambiador de calor de coraza y tubos
Authors: Lara-Lara Jesús , Clemente-Gómez Ricardo , López-Ramos Octaviano
Published: April 2024

Los intercambiadores de calor son aparatos que facilitan el intercambio de calor entre dos fluidos que se encuentran a temperaturas diferentes y evitan al mismo tiempo que se mezclen entre sí. Este trabajo tiene como objetivo diseñar un intercambiador de calor con ayuda del software SolidWorks, se dimensiona y se hacen los cálculos que nos darán el comportamiento de dicho diseño, con el fin de determinar los parámetros más importantes a considerar para la selección y diseño de un intercambiador de calor, para el análisis se considera el coeficiente total de transferencia de calor U, la razón de la transferencia de calor entre los dos fluidos Q ̇y la diferencia media logarítmica de temperatura (LMTD), se toma en cuenta el factor de corrección F que considera la desviación de la diferencia media de temperatura respecto de la LMTD, se utiliza el método de efectividad-NTU, el cual permite analizar los intercambiadores de calor cuando no se conocen las temperaturas de salida de los fluidos. Se obtiene como resultado que un intercambiador de flujo múltiple con aletas es la mejor opción para el diseño por su mayor ganancia de calor entre fluidos, se obtiene el plano del diseño y finalmente la fabricación del dispositivo que sirve para prácticas y el seguimiento del comportamiento de un intercambiador de calor.
Factores económicos influyentes en el desempeño académico de los estudiantes de Contaduría Pública del Tecnológico de Estudios Superiores San Felipe del Progreso.
Authors: Plata-Navarrete Rosa Isela , Ordoñez-Rodríguez Belén , Rojas-García Patricia , Garduño-Martínez Alberto , González-Armenta Eudelia
Published: April 2024

Los componentes económicos son variables primordiales que inciden en el éxito o el fracaso de los estudiantes. En este marco, se desarrolló un estudio que tiene como propósito examinar los factores que intervienen en el rendimiento académico de los alumnos, así que se indaga sobre su incidencia en el rendimiento académico universitario. El presente estudio se realizó bajo un enfoque cuantitativo, pues se obtuvo información estadística acerca de los factores relacionados con el desempeño escolar de los estudiantes de la carrera de Contador Público del Tecnológico de Estudios Superiores de San Felipe del Progreso. Se aplicó una muestra no probabilística de conveniencia, la recolección de los datos se realizó a través de un instrumento denominado Escala Medmar de Rendimiento Escolar. El diseño del método es no experimental, no se buscó la manipulación de las variables de estudio, sino la observación y el análisis de estas. Se trata de un estudio transversal dado que la recolección de los datos fue en un solo momento y tiempo.
Diseño de un sistema electrónico para la manipulación de biopsias a 12 pasos
Authors: Ortiz-Flores Victor Hugo , Gonzalez-Morales Víctor Alfredo , Higuera-Gonzalez Rogelio Manuel , Contreras-Uribe Tania Jetzabel
Published: April 2024

Obtener un diagnóstico clínico a tiempo se ha convertido en un objetivo primordial para la medicina, ya que las enfermedades avanzan constantemente, por lo cual se necesita de un mayor apoyo de la ingeniería para el desarrollo de sistemas capaces de realizar procedimientos automatizados y eficaces que beneficien este campo. En este trabajo se aborda el caso de las máquinas procesadoras de tejidos, se presenta el diseño y simulación del control eléctrico-electrónico de este equipo biomédico que permite la manipulación y el tratamiento de biopsias, cuyo proceso consta de doce pasos. La biopsia es un procedimiento donde se obtiene tejido de cualquier organismo para su estudio histopatológico. Uno de los procedimientos del sistema de biopsia es la recolección de muestras. El sistema para manipulación y control de la máquina está compuesto por un sistema electrónico, diseñado con una etapa de aislamiento óptico, amplificación, registro de temperatura, control de temperatura y control del cambio de giro de los motorreductores. Para la simulación de cada una de las etapas, se utilizó Proteus Demo y LabVIEW en su versión estudiantil.
Sistema Integral de Sustentabilidad y Competitividad Empresarial: Transición estratégica a través del IPC Sustentable
Authors: Mendoza-Cavazos Yolanda , Zerón-Félix Mariana , Mendoza-Cavazos Guillermo
Published: April 2024

La sustentabilidad se convierte cada vez más en un elemento imprescindible para las empresas; esta contribuye al éxito de las organizaciones integrando objetivos en los aspectos económico, ecológico y social; incrementando su competitividad. Inversionistas en todo el mundo consideran trascendente la disposición abierta de la información relacionada con la sustentabilidad para la toma de decisiones. Mediante este estudio es posible identificar y estudiar el alcance de la sustentabilidad en el medio empresarial actual, analizando el nivel de madurez sustentable alcanzado por 20 empresas pertenecientes al IPC Sustentable de la Bolsa Mexicana de Valores en la adopción de un Sistema Integral de Sustentabilidad. Los resultados de la revisión bibliográfica demuestran la importancia de la implementación de estrategias de sustentabilidad en las empresas; y el análisis de las autoevaluaciónes muestra que alcanzan en un 43 % el nivel más alto de integración.
Análisis bibliometrico de la análitica de datos en la educación superior mediante los sistemas de administración de aprendizaje
Authors: Díaz-Diaz Omar , Espinosa-Díaz Yessica , Saldívar-González Sandra Julieta
Published: April 2024

El presente artículo brinda un análisis bibliométrico delestado actual de la investigación de la analítica de datosaplicados al aprendizaje mediada por Tecnologías deInformación y Comunicación, con el objetivo de conoceraspectos del panorama de investigación del tema como,autores y países más productivos, análisis depublicaciones, co-citas, cooperación entre autores, co-ocurrencias de palabras claves y los clústeres deinvestigación para la visualización de la estructuraconceptual del campo de conocimiento. Se utilizó la basede datos Scopus para realizar la búsqueda de publicacionesmediante las palabras claves seleccionadas, arrojando estabúsqueda un total de 153 artículos. Se seleccionaron laspalabras claves siguientes: learning analytics, highereducation, e-learning, las cuales definen el área deconocimiento y los campos de acción del tema investigado.Se recomienda, una revisión más exhaustiva de lasinvestigaciones, para así poder identificar las herramientasy campos de aplicación actuales.
Processes and Challenges Associated with Conducting Survey Research in Conflict Zones
Authors: Rosenberg William L.
Published: April 2024

A wide variety of organizations domestically and internationally conduct surveys in conflict zones. Their timely findings are essential for policy makers. Survey research in conflict zones is an essential tool for policy makers in government, humanitarian, private sector, and non-governmental organizations to develop and evaluate programs, services, and policies. Such research is often even more challenging in less developed areas of the world due to issues related to access, technology, and staffing. Other challenges include population movements, lack of societal data structures such as a recent census, communication systems such as telephones, as well as issues related to sampling, design, and the omnipresent issue of security for the researchers and respondents. Often, researchers must make trade-offs regarding internal and external validity which are tempered by issues related to cost, speed, and accuracy. Policy makers need to feel comfortable in the reliability and the generalizability of the findings they receive or develop. The data collected in conflict zones must strive to use appropriate techniques to quantify the data and evaluate the results. Furthermore, flexibility and adaptability are important concepts to consider when conducting research in conflict zones.
Indigenous Literature
Authors: McMullin Angelina
Published: April 2024

This paper synthesizes Indigenous critical theories of literature and the cultural languages that shape Indigenous literary texts, centering these approaches, and arguing that without this body of literary criticism, it would be impossible for Indigenous and non-Indigenous readers alike to appreciate Indigenous literature, including its profound value to humanity. It demonstrates the power of these theories by offering a reading of Thomas King’s The Back of the Turtle using them as lenses to uncover the rich tapestry, the convergence of tradition and innovation, and the transformative power of Indigenous narratives in shaping our shared understanding of humanity. In many ways, the paper argues, Indigenous critical theories have significantly paved the way for the study and interpretation of Indigenous literature, broadening the scope for readers from diverse backgrounds.
APRENDIZADOS CRUCIAIS EM TREINAMENTO DE SUPORTE BÁSICO DE VIDA: UM RELATO DE EXPERIÊNCIA
Authors: Franco Lucas Pereira de Oliveira , Ferreira Antonio Josimar Silva , Gomes Henrique dos Santos , Garcia Cintia de Lima
Published: April 2024

INTRODUÇÃO: A formação em saúde ressalta capacitar leigos para agir em paradas cardiorrespiratórias, visando atendimento eficaz. OBJETIVO: Este estudo relata uma experiência em uma aula de Suporte Bás
ATENDIMENTO A PACIENTE COM TUBERCULOSE: UM RELATO DE CASO
Authors: casagrande Camilly
Published: April 2024

ATENDIMENTO A PACIENTE COM TUBERCULOSE: UM RELATO DE CASO
RESUMO
Objetivo: relatar estudo de caso de tuberculose extra-pulmonar. Metodologia: Trata-se de estudo decaso de paciente de 28 anos. Relato d
APLICAÇÃO DA MANOBRA DE VALSALVA MODIFICADA PARA INTERVENÇÃO DE TAQUICARDIA SUPRAVENTRICULAR EM SERVIÇOS DE URGÊNCIA E EMERGÊNCIA
Authors: Silva Júlio César Xavier da
Published: April 2024

Taquicardias supraventriculares paroxísticas (TSVp) são as causas mais comuns de arritmia presentes no pronto-socorro. O manejo de tratamento mais recomendado mundialmente para pacientes sintomáticos
MANEJO ADEQUADO DO TRAUMA ESPLÊNICO E SEU IMPACTO NA SOBREVIDA DO PACIENTE
Authors: Grigorio Matheus Amorim , Poggiali Lucca Ferrari , Souza Ana Carolina Lustosa Araújo , Souza Fernanda de Freitas Medeiros de , Lima Filho Vivaldo Palma , Marcos Ivan , Cordeiro Icaro
Published: April 2024

RESUMO
INTRODUÇÃO: O manejo inadequado do trauma esplênico está relacionado a altos índices de morbimortalidade e urge entendimento efetivo de seus mecanismos. A principal causa das lesões esplênicas
Gerenciando a crise asmática como uma emergência respiratória
Authors: Teixeira Kelly Victória Mendes
Published: April 2024

Introdução: A asma é uma doença crônica das vias respiratórias que se caracteriza pela obstrução significativa do fluxo de ar decorrente de uma vasta e intrincada rede de interações entre células infl
REIDRATAÇÃO NA CETOACIDOSE DIABÉTICA: UMA REVISÃO DE LITERATURA
Authors: Santos Gabriel Santiago Teles , Franco Fernanda Tinoco , Gonçalves Bárbara Rocha , Tavares Ricardo Silva
Published: April 2024

Introdução
A cetoacidose é um estado metabólico associado com a concentração plasmática e urinária elevada
patologicamente de corpos cetônicos, sendo eles, acetona, acetoacetato e beta-hidroxibutirato
QUEIMADURAS EM CRIANÇAS ATENDIDAS NO PARANÁ ENTRE 2018 E 2022
Authors: Bavaresco Ana Beatriz , Lima Luan Matheus Siqueira
Published: April 2024

Introdução: As queimaduras são uma das lesões mais graves que podem acometer o corpo humano, sendo ela a principal etiologia de acidentes domésticos em crianças e a segunda causa de mortes não intenci
TRAUMAS DENTÁRIOS EM ESPORTES
Authors: Delmondes Maria Caroline Oliveira , Delmondes Maria Luiza Oliveira
Published: April 2024

Introdução: Ao redor do mundo, o aumento da participação em esportes, tanto por lazer quanto
profissionalmente, tem levado a uma maior preocupação com os traumas dentários. Esportes de contato e
recre
Aplicabilidade do Protocolo FAST na detecção de lesões em politrauma
Authors: CAVALCANTI SOPHIA ALEXANDRE DE QUEIROZ , Esteves Henrique Mazzucatto Duarte , Começanha Leonardo de Maio , Machado Kadja Emanuelle Monteiro Lima , Dias Barbara Gabriele Ono , Januário Hudson rocha , Soares José Pedro Mazzarino
Published: April 2024

Até 40% dos casos de morte em politrauma são decorrentes de hemorragia. No contexto da emergência, além do exame físico, são necessários exames de imagem para a detecção de hipovolemia e identificação
AÇÕES EDUCATIVAS DE ENFERMAGEM NO ENFRENTAMENTO DA ASMA: RELATO DE EXPERIÊNCIA DO PROJETO DE EXTENSÃO UNIVERSITÁRIO
Authors: Manara Carina , Vargas Marli Leal de , Age Monica De Paula Pereira Da Silva
Published: April 2024

Introdução: A asma é uma doença que acomete os pulmões, acompanhada de uma inflamação crônica dos brônquios (Ministério da Saúde-MS, 2020). Mesmo sendo mais comum na infância adultos também podem dese
MOVIMENTAÇÃO ORTODÔNTICA FRENTE A TRAUMATISMOS DENTÁRIOS: UMA REVISÃO DE LITERATURA
Authors: Ferreira Antônio Fabrício Alves , Sousa Ângelo Gaia , Pereira Katia Caetana , Dalbom Vinícius Corrêa , Silva Nádia Maria Pires , Lima Dearley Corrêa , Salomão Thalia Vitoria Sousa Seba , Cruz Poliana da Silva , Lopes Welton Vicente , Costa Daffyne Kelly Silva , Carvalho Laís Sousa Silva , Guimarães Samara de Freitas
Published: April 2024

Considerando que a prevalência de traumatismo dentário prévio ao tratamento ortodôntico é em torno de 10,7% e que ele pode exacerbar uma reabsorção induzida pela movimentação ortodôntica, torna-se evidente a importância de trabalhos associando traumatismos com movimentos ortodônticos. O objetivo deste trabalho é realizar uma revisão de literatura acerca das condutas terapêuticas e protocolos utilizados durante a movimentação ortodôntica envolvendo dentes traumatizados. Através de busca bibliográfica nas bases de dados PubMed, Google Scholar e Scielo, foram selecionados artigos entre 2000 e 2020 em português e inglês. As palavras-chave utilizadas foram tooth movement techniques; tooth injuries; técnicas de movimentação dentária e dentes traumatizados, sendo incluídos estudos randomizados, revisões de literatura e relatos de caso. Segundo os artigos pesquisados, o protocolo de movimentação ortodôntica em dentes traumatizados envolve um período de observação prévio para cada tipo de trauma. Para as fraturas coronárias e corono-radiculares sem envolvimento pulpar deve ser aguardado um período de 3 meses para início de tratamento ortodôntico e, caso tenha envolvimento pulpar, estender até que haja evidências de saúde pulpar e periodontal; para concussão e subluxação deve-se aguardar 3 a 4 meses; luxações lateral, intrusiva, extrusiva e avulsão 1 ano de acompanhamento e para as fraturas radiculares estipula-se um período mínimo de 2 anos. Com base nesta revisão de literatura, conclui-se que a movimentação ortodôntica em dentes traumatizados não é contraindicada, porém uma boa anamnese, exames clínico e radiográfico, e acompanhamento são a base para o estabelecimento de um apurado prognóstico e elaboração de um correto plano de tratamento.

Palavras-chave: Odontologia; Ortodontia; Técnicas de movimentação dentária; Traumatismo dentário.
EFICÁCIA DOS METÓDOS AUXILIARES NA IRRIGAÇÃO DO SISTEMA DE CANAIS RADICULARES: UMA REVISÃO DE LITERATURA
Authors: Ferreira Antônio Fabricio Alves , Sena Leandro Rodrigues de , Guimarães Samara de Freitas , Cardenas Andres Felipe Millan , Siqueira Fabiana Suelen Figuerêdo de , Almeida Rossana Aboud Matos de , Soares Gustavo Leon Oliveira , Ferreira Glória Maria Linhares Bandeira de Melo , Chaves Narla dos Reis Bacelar , Salomão Thalia Vitória Sousa Seba , Cândido Valéria Ferreira , Dalbom Vinícius Corrêa
Published: April 2024

O tratamento endodôntico tem como finalidade a permanência do elemento dentário na cavidade oral, permitindo a reabilitação do elemento e o reestabelecimento da saúde do paciente. O procedimento é executado cumprindo-se algumas etapas, como modelagem mecânica, limpeza química e obturação do sistema de canais, com a finalidade de diminuir o número de microrganismos no interior do elemento dentário e promover o selamento do sistema de canais radiculares (SCR). O objetivo deste trabalho é verificar, através de uma revisão de literatura, a eficácia do uso de métodos auxiliares na irrigação do SCR. Foi realizada busca bibliográfica nas bases de dados Pubmed, BVS e Google Acadêmico. Os trabalhos selecionados apontam que o uso de métodos irrigadores auxiliares potencializa os efeitos antimicrobianos das soluções irrigadoras ao mesmo tempo em que promovem uma maior eliminação das raspas dentinárias, de modo que se alcança uma desinfecção e limpeza mais eficientes do SCR. A pesquisa também permitiu constatar que o método de irrigação ultrassônica passiva (PUI) é o mais eficaz em comparação com os outros métodos auxiliares por permitir um maior alcance da solução irrigadora no interior do SCR, contribuindo para vencer os desafios anatômicos.

Palavras-chave: irrigação ultrassônica; tratamento endodôntico; potencialização; agitação de solução irrigadora.
Kinetic Modeling of the Alkaline Decomposition and Cyanidation of Argentian Plumbojarosite
Authors: Patiño Francisco , Uriel Flores Mizraim , Reyes Iván Alejandro , Islas Hernán , Reyes Martín , Juárez Guillermo
Published: April 2024

The used sample was a solid plumbojarosite-argentian jarosite-hydronium jarosite solution. The stoichiometry of the alkaline decomposition and cyanide reaction in alkaline medium were studied. Alkaline decomposition shows an induction period, as well as a conversion period. Results on the reaction order and activation energy are consistent with the spherical particle model with decreasing core and chemical control. Six partial models and three global models were developed in order to describe its basic behavior. In every case the models were validated and tested for a plumbojarosite conversion of X = 0.75.
Liquid Chromatography for the Analysis of Hydrophilic Drugs in the Presence of Ionic Liquids
Authors: Garza Tapia Marsela , Chávez Montes Abelardo , Moyano Morcillo Encarnación , Galceran i Huguet Ma. Teresa , Waksman de Torres Noemí H. , Castro Ríos Rocío
Published: April 2024

Currently available methods for the analysis of hydrophilic compounds are usually time-consuming, tedious and inefficient. Ionic liquids (ILs) are salts with low melting points that are described as designer solvents. When ILs are used in the extraction of hydrophilic compounds, liquid chromatographic analysis can be challenging, as a result of co-elution of the IL with the analyte and poor miscibility of the IL with the mobile phase. This paper describes the development of analytical methods for hydrophilic compounds in the presence of water-immiscible ILs. Conventional and ion-pair reversed phase and hydrophilic interaction liquid chromatography were tested, with the best results obtained with the last one. The proposed methods showed a good performance and represent a useful alternative for the analysis of hydrophilic drugs.
Convenient Reductive Amination of Aldehydes by NaBH4/Cation Exchange Resin
Authors: Setamdideh Davood , Sepehraddin Farhad
Published: April 2024

Different secondary amines have been synthesized by reductive amination a variety of aldehydes and anilines with NaBH4/DOWEX(R)50WX8 as reducing system in THF at room temperature in high to excellent yields of products (85-93%).
Camphor Sulfonic Acid-hydrochloric Acid Codoped Polyaniline/polyvinyl Alcohol Composite: Synthesis and Characterization
Authors: Osorio-Fuente Jorge Enrique , Gómez-Yáñez Carlos , Hernández-Pérez María de los Ángeles , Pérez-Moreno Fidel
Published: April 2024

A complementary dopant system formed by hydrochloric and camphor sulfonic (CSA) acids was used in the in-situ synthesis of a polyaniline (PANi)/polyvinyl alcohol (PVA) composite. The conductivity measurements showed that the use of CSA either as single dopant or codopant caused a decrement up to 2 orders of magnitude on the overall conductivity as well as an improvement on thermal stability. The PANi/PVA composites were characterized by spectroscopic and thermal analysis. Conducting emeraldine salt formation was confirmed by UV-VIS and FTIR spectroscopy. Microstructure analysis was performed by SEM imaging.
Label-free Electrochemical Immunosensors for Viruses and Antibodies Detection-Review
Authors: Radecka Hanna , Radecki Jerzy
Published: April 2024

This article reviews the electrochemical immunosensors de-veloped by the successive modification of gold as well as glassy car-bon electrodes. Antibody or antigen fragments have been applied as the sensing elements. The complex between virions and specific anti-body adsorbing on a surface of an electrode forms an insulating layer. This phenomenon, which is a base of ion – channel mimetic type of immunosensors, can be monitored by Osteryoung square-wave vol-tammetry (OSWV) and electrochemical impedance spectroscopy (EIS) in the presence of [Fe(CN)6]3-/4- as a redox marker. Another type of immunosensors are based on redox active layers incorporated di-pyrromethene -Cu(II) or phenanthroline – Epoxy - Fe(III) complex-es. Changes of electrochemical parameters of redox centres upon tar-get analyte binding are the basis of analytical signal generation. Both type of immunosensors displayed better sensitivity in comparison to ELISA as well as being very selective. The matrix has no influence on the immunosensors performance. These devices could be recommend-ed for the direct electrochemical detection of viruses as well as anti-bodies in physiological samples.
Mechanisms of Analytical Signals Generated by Electrochemical Genosensors - Review
Authors: Radecki Jerzy , Radecka Hanna
Published: April 2024

Detection and analysis of specific DNA sequences is an im-portant approach in molecular diagnosis. Avian influenza viruses (AIVs), in particular the highly pathogenic H5 subtype, could cause severe diseases. They are endemic in wild birds and their introduction and conversion to highly pathogenic avian influenza virus in domestic poultry is a cause of serious economic losses as well as a risk for po-tential transmission to humans. We report a short review of electro-chemical genosensors devoted for detection of influenza virus H5N1 gene sequence. We will focus our attention on ion-channel mechanism, E-DNA sensors and genosensors based on redox active layer. A novel a dual DNA electrochemical sensor with “signal-off” and “signal-on” architecture for simultaneous detection of two different sequences of DNA derived from Avian Influenza Virus type H5N1 by means of one electrode is presented.
The Role of the π Acceptor Character of Polypyridine Ligands on the Electrochemical Response of Co(II) Complexes and its Effect on the Homogenous Electron Transfer Rate Constant with the Enzyme Glucose Oxidase
Authors: Ramírez-Delgado Vanessa , Cruz-Ramirez Marisela , Hernández-Ayala Luis Felipe , Reyes-Vidal Yolanda , Patakfalvi Rita , García-Ramos Juan Carlos , Tenorio Francisco J. , Ruiz-Azuara Lena , Ortiz-Frade Luis
Published: April 2024

In this work the electrochemical behavior of Co(II) com-plexes with substituted bidentate and tridentate polypyridine ligands [CoL3](BF4)2 and [CoL´2](NO3)2 in 0.1M phosphate buffer pH 7.2 was studied. A reversible electrochemical process Co(II)Ln → Co(III) Ln +1eˉ was observed. A linear relationship between the redox poten-tial (E°) and the pKa of the non-coordinated ligand was found. It was demonstrated by DFT calculations the use of pKa value as a descriptor of the π acceptor character of a ligand. The electrochemical response in the presence of glucose oxidase (GOx) was also studied. It was pos-sible to establish a tendency between the homogeneous electron trans-fer rate constant (ks) and the redox potential (E°) for the compounds studied in this work and other examples taken from the literature.
Electrochemical Behavior of Ni(II) Complexes with N2S2 and N6 Ligands as Potential Catalysts in Hydrogen Evolution Reaction
Authors: Ramírez-Delgado Vanessa , Osorio-Monreal Guadalupe , Hernández-Ayala Luis Felipe , Reyes-Vidal Yolanda , García-Ramos Juan Carlos , Ruiz-Azuara Lena , Ortiz-Frade Luis
Published: April 2024

In this work, two Ni(II) complexes with the tetradentate ligand N2S2 (pdto=1,8-bis(2-pyridyl)-3,6-dithioctane,) and the hexa-dentate ligand N6 (bdahp= 2,9-bis-(2’,5’-diazahexanyl)-1,10-phenan-throline) were prepared in order to explore its electrochemical behavior, that indicate their potential use as molecular catalysts for the hydrogen evolution reaction. The Ni(II)-pdto complex presented two consecutive one electron transfer [Ni(ΙΙ)-(pdto)] + 1e- [Ni(Ι)-(pd-to)] and [Ni(Ι)-(pdto)] + 1 e- → Ni(0) + pdto. On the other hand the Ni(II)-bdahp complex presented the electrochemical reduction Ni(ΙΙ)-(bdahp) + 1e- Ni(Ι)-(bdahp) followed by a coupled chemical reaction in an ECi mechanism, where a de-coordination of the diimin-ic moiety of the bdahp ligand was proposed. It was demonstrated that the pdto ligand promotes reduction over Ni(II) at less negative reduc-tion potential in comparison when the ligand bdahp is presented.
História e didática: diálogos eletivos a partir do Brasil
Authors: Schmidt Maria Auxiliadora
Published: April 2024

El trabajo buscó poner en perspectiva la compleja relación entre Historia, enseñanza/aprendizaje, a partir de su recorrido en Brasil. En este sentido, a partir de investigaciones en documentos relativos a reformas curriculares, así como en manuales de Didáctica de la Historia para docentes, se intentó acompañar la construcción de la presencia hegemónica de ciertas formas de escolarización del saber histórico, particularmente en lo que se refiere a la concepciones de la ciencia, así como el método de enseñanza y las visiones del aprendizaje que surgen de la pedagogía y la psicología, resultando en el éxito de la transposición didáctica. Retomando la relación con la historiografía, Jörn Rüsen, entre otros investigadores de la Didáctica de la Historia, contribuyó a cierta revolución en las posibilidades de diálogo entre la ciencia de la historia y su enseñanza. Anclados, principalmente, en los debates contemporáneos sobre la teoría de la historia, provocaron renovaciones en el contexto de la Didáctica de la Historia, particularmente en lo que se refiere a la presencia de elementos del método de producción del conocimiento histórico como método de enseñanza. Además, diferentes teóricos y filósofos europeos, norteamericanos y sudamericanos introdujeron la relación definitiva entre la Historia y la formación del pensamiento histórico. Esta renovación, que se viene produciendo desde finales del siglo XX, ha dado lugar a numerosas investigaciones y producciones académicas y, con ello, se puede hablar de la necesidad de repensar el diálogo entre la ciencia de la Historia y su aprendizaje y enseñanza, optando por perspectivas que incluyen también la lucha y la resistencia de los pueblos oprimidos por su emancipación.
“Guatones” y “chascones”. Facciones y unidades generacionales en la Democracia Cristiana durante la dictadura de Pinochet. (1973-1989)
Authors: Muñoz Tamayo Victor , Moyano Barahona Cristina
Published: April 2024

El objetivo de este artículo es analizar los debates, tensiones y definiciones político-partidarias de la Democracia Cristiana chilena durante los años de la dictadura de Pinochet, atendiendo a las prácticas políticas de los subgrupos partidarios conocidos como “guatones” y “chascones”. Se propone un abordaje centrado en la Juventud Demócrata Cristiana (JDC) y en las identidades políticas que se forjan en ella, pues se sostiene como hipótesis que los subgrupos analizados tienen su origen en la JDC y desde ahí se proyectan al partido en cuanto unidades de identidad política generacional. El estudio se construye a partir del análisis de documentos partidarios, prensa y un conjunto de entrevistas en profundidad a dirigentes demócrata cristianos.
Enhancing generative adversarial network
Authors: Rajbeer Kaur  , Amanpreet Kaur  , Kirandeep Kaur
Published: April 2024

The paper provides a comprehensive review of various GAN methods from the perspectives of theory, and applications. GAN algorithms' mathematical representations, and structures are detailed. The commonalities and differences among these GANs methods are compared. Theoretical issues related to GANs are explored, and typical applications in various fields are showcased. Future scope of research problems for GANs are also discussed in the paper.
Bibliometric analysis of artemisinin combination therapy efficacy publications on SCOPUS and PUBMED databases
Authors: Chinelo K. Ezejiegu  , Angus N. Oli  , Uchenna C. Ogwaluonye  , Chidimma R. Chukwunwejim  , Charles O. Esimone
Published: April 2024

In line with research efforts towards malaria control and eradication, this study was proposed to provide a bibliometric summary of research output on ACT resistance/ therapeutic efficacy. Keywords related to ACT efficacy were used to retrieve literature using the PUBMED and SCOPUS databases. In total we obtained 7082 and 3031 journal articles were retrieved from the databases respectively. The number of publications on SCOPUS was within the same range of 310-370 except for 2023 which recorded only 207 publications, while for PUBMED, publications showed a noticeable increase between 2006 and 2015. The malaria journal was well represented in both databases with 195, 2.7% appearance in PUBMED and 588, 19.4% in SCOPUS. Although it was the most productive journal in SCOPUS, in PUBMED we had BMC medicine (333, 4.7%). Publications in SCOPUS recorded an average yearly citation of 13.8, further individual analysis showed that 533, 7.5% of publications were cited eleven to twenty times, followed closely by 525,7.4% of the publications with six to 10 citations. Analysis of Author contribution showed majority of publications in the authorship of 6 and above.
Characterization of new hydrophilic polymers obtained from co-processed Detarium microcarpum seed gum with acacia, guar and tragacanth gums
Authors: Nkemakolam Nwachukwu  , Chisom Martha Ani
Published: April 2024

This work was aimed at developing and characterizing new hydrophilic polymers obtained through co-processing of Detarium microcarpum seed gum (DMG) with acacia (ACG), guar (GGG) and tragacanth (TGG) gums respectively. The hydrophilic polymer obtained from the seed of Detarium microcarpum (DT) was co-processed with acacia, guar and tragacanth gums respectively in proportions of 5%DMG+95%ACG, 10%DMG+90%ACG, 15%DMG+85%ACG, and 20%DMG+80%ACG. Replicate co-processed powders of DMG+GGG and DMG+TGG were prepared. The co-processed powders were characterized for: densities (bulk density, tapped density and particle density), flow parameters (flow rate, angle of repose, Hausner’s quotient, Carr’s index and porosity), moisture properties (hydration capacity, swelling index, moisture content and moisture absorption), viscosity and pH respectively using standard methods. The results obtained showed that the densities of the polymers increased at all the concentrations they were co-processed. However, not all the co-processed polymers had a good flow. Moisture studies showed improved hydrophilic properties for all the co-processed polymers with regards to the swelling index and hydration capacities. The viscosities of the composite co-processed polymers also increased as the concentrations of the co-processed gums increased. Co­processing of acacia, guar and tragacanth gums with D. microcarpum seed gum enhanced the swelling index, hydration capacities and viscosities of these gums. This demonstrates that the new hydrophilic polymers obtained from the co-processing can be used as good suspending, disintegrating and binding agents when properly applied in drug formulations.
Establishment of health food safety evaluation method-In vivo genotoxicity evaluation by micronucleus assay
Authors: Yi-Wei Lai  , Pi-Hsin Chen  , Ya-Ling Cyue  , Ya-Peng Wang  , Yu-Ying Fang  , Shih-Yi Guo  , Chia-Ying Lin  , Keng-Chia Hsu  , Tsung-Han Wu  , Yan-Zhong Wu  , Yu-Hsing Lin  , Shao-Wen Hung
Published: April 2024

In recent years, various factors such as shifts in health consciousness, changes in lifestyle habits, increased focus on dietary intake, the promotion of alternative medical concepts, and advancements in life sciences and technology have propelled the robust growth of the health food industry. An increasing number of reports suggest that "functional foods," containing beneficial functional components, may enhance short-term well-being and are increasingly regarded as healthful. Building upon these findings, this study aims to enhance the production capacity of high-value agricultural products. However, for quality assurance, toxicity assessment of functional foods is imperative. There is a growing necessity to employ in vivo genotoxicity assays to evaluate the carcinogenic potential of these products. In this study, we tried to establish another in vivo genotoxicity evaluation platform via acridine orange induction. According to all results in this study, during the experiment, there were no statistically significant differences in BW between the negative control group and the normal control group (p > 0.05). Moreover, the clinical observations of the experimental mice showed that all mice survived until the end of the experiment, and no abnormal clinical symptoms were observed. The mouse’s food consumption in each group were monitored during the experiments. The food consumption of mice was recorded daily after the experiment. During the experiments, there were no significant difference between two groups on the food consumption. The percentage of RETs/1,000 RBCs in the negative control group was significantly decrease than the normal control group (p < 0.001). RETs/1,000 RBCs (‰) in ICR mice (n = 5/group) in the negative control group and the normal control group at 48th and 72th hours-experiment were respectively 18 ± 4.6 / 45.6 ± 4.0 (48th hours-experiment) and 19 ± 4.8 / 47.6 ± 4.8 (72th hours-experiment). The percentage of Mn-RETs/1,000 RETs in the negative control group was significantly increase than the normal control group (p < 0.001). Mn-RETs/1,000 RETs (‰) in ICR mice (n = 5/group) in the negative control group and the normal control group were 10.6 ± 2.1 / 0.4 ± 0.5 and 8.2 ± 1.8 / 0.4 ± 0.5, respectively. Taken all results of RET/RBCs (‰) and MN-RET/RETs (‰) together, the genotoxicity in the negative control group has been successfully induced. In light of these requirements, we propose utilizing the mammalian erythrocyte micronucleus assay to detect damage induced by test substances to erythroblast chromosomes. This study endeavors to establish a sensitive and stable method for quantifying micronuclei formation in erythrocytes in vivo. The resulting data will facilitate the evaluation of potential toxicity associated with agricultural functional products in the future.
Horizon of Healthcare: AI's Evolutionary Journey and Future Implications
Authors: Shifan Khanday  , Azza shaloob  , Fathima maryam muzammil  , Hafsah shehzad  , Adia rounak Shriya  , Saima khan
Published: April 2024

This meta-analysis offers a comprehensive review of the literature surrounding the integration of Artificial Intelligence (AI) in healthcare. Drawing upon an extensive array of scholarly articles, research papers, and industry reports, this study synthesizes the current state of knowledge regarding AI's applications, challenges, and future directions within the healthcare sector. The analysis encompasses various dimensions of AI implementation, including diagnostic assistance, treatment optimization, patient management, and administrative streamlining. Additionally, it examines the methodological approaches employed in AI healthcare research, assessing the efficacy and reliability of AI-driven interventions across diverse medical domains. Furthermore, this meta-analysis explores the ethical, legal, and social implications associated with AI adoption in healthcare, shedding light on issues of data privacy, algorithmic bias, and patient autonomy. Through a systematic examination of existing literature, this study elucidates key trends, knowledge gaps, and emerging research directions in the evolving intersection of AI and healthcare, providing valuable insights for policymakers, practitioners, and researchers alike.
Study of petrol degrading bacteria and screening for biosurfactants
Authors: Pratibha Jinesh Shah  , Jaya Naresh Israni  , Insiya Zulfeqar Lokhandwala
Published: April 2024

Petroleum-based products when mixed with soil, air and water can lead to environmental pollution which can be dangerous for humans. In the current study, soil samples from the petrol unloading area of a petrol pump were collected and nine isolates of petrol degrading bacteria were isolated from the soil by enrichment technique using Bushnell and Hass media. The isolated bacteria could degrade up to 5% petrol and the best degraders were chosen after evaluating their cell mass when grown in the presence of petrol. The percentage of petrol degraded after different intervals of incubation was compared using a UV-vis double beam spectrometer at 228 nm. It was found that the two bacteria - Pseudomonas aeruginosa and Burkholderia cepacia degraded petrol 94.96% and 94.74%, respectively, by day 15 of incubation. The percentage degradation gradually decreased by day 20. Both bacteria were also screened for the production of biosurfactants through haemolysis. It was found that both the bacteria could produce biosurfactant along with them being a potent petrol degrader.
Design and Implementation Monitoring System for The effects of Prolonged Sitting
Authors: Yulastri Yulastri , Adila Asril Aprinal , Madona Era , Putra Roni
Published: April 2024

Workers spent more than two-thirds of their working hours sitting behind their desk. Almost all of them never put attention to good sitting position and caused health problems for themselves such as increasing the risk of hemorrhoids, heart disease, diabetes, obesity, joints damage, muscles and posture. The workers are not aware into account how long they had been sitting. Thus, one way to avoid health problems caused by long-term sitting is using a device which monitors body temperature, heart and muscle. In this study, the prototype is designed and implemented to monitor how long the worker had sit in their chair and the effect to their body. This system detected the temperature on the chair using temperature sensor, sensor ECG to heart detection placed on the finger and the sensor EMG to detect muscle is placed on the hand muscles. The information from the sensors are sent and saved to the database server and displayed through the website. The test results indicate that body weight and gender affect the speed of rise of body temperature which is measured on the seat cushions. Functional testing using the web interface successfully performed in displaying the results to the web interface sensor readings in real time and displays the results of the previous sensor readings.
Monitoring Pesticide Watering On Plants Shallot Using Mosquitto Network (MQTT) Client-Server Network
Authors: Melindra Muhammad Yaafi , Hendrick Hendrick , Alfitri Nadia , Rahmat Rahmat
Published: April 2024

Shallots are one of the leading commodities in several regions in Indonesia. In the cultivation of shallot plants there are pests that can reduce the quality of shallots. Along with the times, and to overcome the problem of watering pesticides for shallot plants, an automation tool is designed to make it easier for farmers to water pesticides. The design of this tool uses the concept of Internet of Thing (IoT) where the application used is Node-RED with the MQTT protocol. The optimum humidity for the growth and development of shallot plants is 50-70%, so soil moisture sensors are used to measure soil moisture. Pesticide watering also looks at weather conditions such as rain. Therefore, the raindrop sensor is used to detect rain. From several trials that have been carried out, it produces one experimental result that shows soil moisture of 35% where weather conditions are not raining and, the relay is active to perform pesticide watering. This indicates that the pesticide watering of shallot plants using the MQTT client-server network is successful carried out.