Article
Biochemistry & Molecular Biology
Jin-Myung Choi, Hiroki Suko, Kyusun Kim, Jiye Han, Sangsu Lee, Yutaka Matsuo, Shigeo Maruyama, Il Jeon, Hirofumi Daiguji
Summary: This study improved the moisture and oxygen barrier ability as well as heat releasing capability in the passivation of perovskite solar cells (PSCs) by adding multi-walled carbon nanotubes to the epoxy resin used for encapsulation. The PSCs encapsulated with carbon nanotube-added resin exhibited more stable operation and only experienced a ca. 30% efficiency decrease over one week compared to the ca. 63% decrease in the reference devices.
Article
Energy & Fuels
Rafael Vicentini, Willian G. Nunes, Lenon H. da Costa, Leonardo M. Da Silva, Bruno Freitas, Aline M. Pascon, Otavio Vilas-Boas, Hudson Zanin
Summary: A novel multi-walled carbon nanotubes and activated carbon composite material was reported as an electrode for electrochemical capacitors, showing low equivalent series resistance and operational stability in aqueous electrolytes. The simple, fast, and low-cost approach resulted in devices with high voltage and specific capacitance, demonstrating good cyclability and potential for environmentally friendly electrolytes.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Thiago A. Moura, Wellington Q. Neves, Rafael S. Alencar, Y. A. Kim, M. Endo, Thiago L. Vasconcelos, Deyse G. Costa, Graziani Candiotto, Rodrigo B. Capaz, Paulo T. Araujo, Antonio G. Souza Filho, Alexandre R. Paschoal
Summary: The unique electronic and vibrational properties of linear carbon chains (LCCs) have attracted attention recently. Raman spectroscopy has been widely used to identify LCC and study its properties. This study investigates the optical resonance window of LCCs encapsulated by multi-walled carbon nanotubes (MWCNTs) and a Raman signature assigned to the LCC's longitudinal acoustic phonon mode. First-principles calculations support the conclusions.
Article
Chemistry, Physical
Qianyu Ji, Bowen Wang, Yajuan Zheng, Xueping Yan, Fanguang Zeng, Bingheng Lu
Summary: The study introduces bulk graphene/carbon nanotubes hybrid materials for field emission applications, showcasing excellent stability and high efficiency. These bulk emitters are suitable for high-power cold cathode applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Biotechnology & Applied Microbiology
Won-Seok Lee, Ji-Hye Kang, Jung-Hwan Lee, Yoo Sung Kim, Jongmin Joseph Kim, Han-Sem Kim, Hae-Won Kim, Ueon Sang Shin, Bo-Eun Yoon
Summary: The study utilized carbon nanotube platforms to enhance astrocyte functions, such as improving cell adhesion, proliferation, and gliotransmission, by increasing resting Ca2+ levels.
JOURNAL OF NANOBIOTECHNOLOGY
(2022)
Article
Materials Science, Ceramics
R. Fernandez-Loyola, M. Muthuvel, A. B. Hernandez-Maldonado, J. A. Menchaca-Rivera, J. F. Perez-Robles, O. Solorza-Feria, G. G. Botte
Summary: A new nanocomposite material involving multi-walled carbon nanotubes (MWCNTs) was synthesized using the traditional chemical vapor deposition (CVD) method. The morphological and structural characterization, as well as the electrochemical evaluation, indicate the potential application of these nanocomposites as efficient electrocatalysts.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Xiaogang Luo, Dongli Xie, Jing Su, Jianchen Hu
Summary: This study evaluated the adverse effects and toxic mechanisms of multi-walled carbon nanotubes (MWCNTs) on human ocular cells. The results showed that MWCNTs could enter the cells and cause cell damage, leading to decreased cell viabilities. RNA sequencing analysis identified key genes associated with MWCNT exposure, particularly inflammation-related genes. Validation experiments confirmed the upregulation of these genes and their regulation by long non-coding RNAs. These findings provide promising biomarkers for monitoring MWCNT-induced eye disorders and targets for developing preventive and therapeutic strategies.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2023)
Article
Chemistry, Analytical
Jiaxin Zhou, Yi Xia, Zhirong Zou, Qing Yang, Xue Jiang, Xiaoli Xiong
Summary: This study presents a composite carbon nanomaterial electrode of CDs/MWCNTs, which is synthesized using liquid dielectric barrier discharge (DBD) microplasma. The electrode shows enhanced electron transfer and electrocatalytic activity for sensitive detection of dopamine (DA). The sensor exhibits good sensing performance and successfully detects DA levels in human serum samples with satisfactory selectivity and recovery rate.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Yuehong Yin, Guohua Cao, Lige Fu, Zhifei Wei, Haofeng Li, Pingping Wu, Ming Li, Haitao Zong, Lingling Yan, Baoqing Zhang
Summary: In this study, multi-walled carbon nanotubes (MWCNTs) with strong visible fluorescence were synthesized via oxidation and amination. The oxygen-containing surface functional groups contributing to fluorescence emission were found, and novel carbon nanoclusters with a diameter of 20-30 nm were formed at the tips of MWCNTs. The fluorescent MWCNTs exhibited distinct excitation-wavelength dependence, pH response, and temperature sensitivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xigui Yang, Jiajun Dong, Mingguang Yao, Kuo Hu, Huanhuan Sun, Ran Liu, Chong-Xin Shan, Bingbing Liu
Summary: The study introduces a new method for the synthesis of diamond-graphite hybrid nanocomposite from multi-walled carbon nanotubes fibers using laser heating diamond anvil cell, with a combined theory-experiment approach confirming the formation of the hybrid structure. This approach opens up a new avenue for generating new carbon nanocomposites using high pressure techniques and other suitable carbon precursors.
Article
Materials Science, Multidisciplinary
Raja Rashidul Hasan, Jasika Jasmine, Ahmed Mortuza Saleque, Sumit Hassan Eshan, Raja Tariqul Hasan Tusher, Sadia Zabin, Nadia Nowshin, Md. Abdur Rahman, Yuen Hong Tsang
Summary: This paper proposes the use of a small patch antenna with multiwall carbon nanotubes (MWCNTs) for early detection of breast cancer. The antenna shows promising results in free space and on a breast phantom model, making it a cost-effective and portable screening tool, particularly in resource-constrained regions.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Gabrielle B. Novais, Mariana A. Dias, Adilson A. M. Santana, Thigna C. Batista, Maria N. Marques, Carlisson R. Melo, Ricardo L. C. Albuquerque Junior, Margarete Z. Gomes, Patricia Severino, Eliana B. Souto, Juliana C. Cardoso
Summary: This work focuses on the functionalization of SWCNTs and MWCNTs with two selected isoflavones and compares their physicochemical properties. Acidic treatment improved the dispersibility of both types of nanotubes, but SWCNTs still remained aggregated. However, MWCNTs showed increased dispersibility after acidic treatment. The functionalization with isoflavones was confirmed by improved dispersibility of the nanotubes.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Materials Science, Multidisciplinary
Valery Ya. Rudyak, Gennady R. Dashapilov, Andrey V. Minakov, Maxim I. Pryazhnikov
Summary: The purpose of this study is to analyze the viscosity and rheology of nanofluids containing single-walled and multi-walled carbon nanotubes and compare their findings. The experiments involved a variety of nanofluids with the same base fluids and weight concentrations of CNTs and surfactants. The results showed that nanofluids with single-walled carbon nanotubes exhibited significantly higher viscosity than those with multi-walled carbon nanotubes. Most of the studied nanofluids exhibited pseudo-plastic or viscoplastic behavior, despite the Newtonian nature of the base fluids. Correlations describing the rheology of all investigated nanofluids were provided, along with the observation that the viscosity of nanofluids increased with a decrease in the average hydrodynamic size of nanotubes. The microrheology of these nanofluids was also studied, revealing the dependence of their elastic modulus on the concentration of CNTs.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mengyao Chen, Xiaohua Qi, Wenna Zhang, Na Yang, Di Yang, Yao Wang, Lixiu Zhang, Wenbin Yang, Linjun Huang, Miaorong Zhang, Shichao Wang, Peter Strizhak, Jianguo Tang
Summary: Unzipping of carbon nanotubes (CNTs) according to the modified Hummers method results in unzipped CNTs (uCNTs) with self-photoluminescence properties depending on the diameter of pristine CNTs. The unzipping process introduces defects and oxygen-containing functional groups, while larger diameter pristine CNTs reduce the edge etching effect and functionality of uCNTs. Additionally, UV-Vis spectra show that the band gap of uCNTs increases with decreasing diameter, leading to strong fluorescence in the visible light region.
Article
Engineering, Environmental
Ahmed I. EL-Seesy, Mahmoud S. Waly, Hesham M. El-Batsh, Radwan M. El-Zoheiry
Summary: Nitrogen-doped multiwalled carbon nanotubes (N-doped MWCNTs) are effective catalysts that can improve diesel engine performance and reduce exhaust emissions. Adding N-doped MWCNTs to diesel fuel significantly enhances combustion behavior, engine performance, and exhaust emission analysis. It increases in-cylinder pressure and heat release rate, improves brake thermal efficiency, reduces brake specific fuel consumption, and significantly reduces NOx, soot, and CO formations in exhaust emissions compared to diesel and MWCNTs blends.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Computer Science, Information Systems
A. F. Versiani, R. G. Sousa, P. T. Monteforte, J. J. S. Marciano, E. G. Nepomuceno, T. E. Nazare, M. J. Lacerda, M. F. S. Barroso, M. A. Abdalla-Junior, E. L. F. C. Alvarenga, N. C. Silva, A. M. Silva-Junior
Summary: This study investigated the impact of isolation measures on the spread of Covid-19 in the State of Minas Gerais, Brazil using the SEIR model. The results showed that reducing isolation can significantly decrease the peak of infected individuals, and around 70% isolation is needed to ensure a good quality of health service during the pandemic.
IEEE LATIN AMERICA TRANSACTIONS
(2021)
Article
Microbiology
Jessica Silva, Roberto Dias, Jose Ivo Junior, Maraisa Marcelino, Mirelly Silva, Adriele Carmo, Maira Sousa, Cynthia Silva, Sergio de Paula
Summary: This study evaluated the production of a T4-like bacteriophage in seven types of culture media and optimized the process by using four cultivation variables. The rotatable central composite design methodology was used to determine the ideal conditions for scaling up production. Despite the high number of conditions evaluated, the results showed that effective viral production could be achieved even with minimal medium, reducing costs during large-scale production.
Article
Chemistry, Physical
Gabriel L. Machado, Felipe M. F. Teixeira, Gabriel S. C. Ferreira, Alice F. Versiani, Lidia M. Andrade, Luiz O. Ladeira, Flavio G. da Fonseca, Jhonattan C. Ramirez
Summary: This paper presents a localized surface plasmon resonance (LSPR)-based biosensor for selectively detecting four serotypes of Dengue virus (DENVx) in seropositive patients. The behavior of gold nanoparticles in the shape of nanorods is studied theoretically and numerically, with induced structural variations observed during the detection process. The predictability of experimental results is calculated using the largest Lyapunov exponent, revealing chaotic systems with low repetition probability. The genetic similarity between certain DENV serotypes is evidenced through analysis of the resonance curve generated by the LSPR system. The biosensors are validated using samples from seronegative patients for DENVx and seropositive patients for other Flaviviruses.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2022)
Review
Virology
Thaise Yasmine Vasconcelos de Lima Cavalcanti, Mylena Ribeiro Pereira, Sergio Oliveira de Paula, Rafael Freitas de Oliveira Franca
Summary: Chikungunya virus (CHIKV) is a mosquito-borne alphavirus that has recently re-emerged, causing large-scale outbreaks worldwide. The infection mainly presents as severe joint pain and myalgia, but can also lead to severe complications such as neurological disorders and even death. Factors such as virus evolution, globalization, and climate change contribute to the spread of CHIKV, while the lack of preventive vaccines and effective antiviral treatments make it a major global health threat.
Article
Medicine, General & Internal
John Willians Oliveira Prates, Mariana Fonseca Xisto, Joao Vitor da Silva Rodrigues, Joao Pedro Cruz Colombari, Julia Maria Alves Meira, Roberto Sousa Dias, Cynthia Canedo da Silva, E. Sergio Oliveira de Paula
Summary: In this study, the Zika virus envelope protein was successfully produced in K. phaffii KM71H cells and showed potential for diagnostic applications based on ELISA results.
Article
Immunology
Luis A. F. Andrade, Alice F. Versiani, Edel F. Barbosa-Stancioli, Jenner K. P. dos Reis, Jordana Grazziela A. C. dos Reis, Flavio G. da Fonseca
Summary: The feline immunodeficiency virus (FIV) is a global retrovirus that affects both domestic and wild cats, and can lead to death. Currently, there is only one effective vaccine for certain FIV subtypes, while another common subtype is not preventable by vaccination. Researchers have developed a new vaccine prototype and conducted preclinical tests in mice, showing potential for further development and use in cats.
Article
Nutrition & Dietetics
Kelly Aparecida Dias, Aline Rosignoli da Conceicao, Stephanie Michelin Santana Pereira, Livya Alves Oliveira, Joao Vitor da Silva Rodrigues, Roberto Sousa Dias, Sergio Oliveira de Paula, Antonio Jose Natali, Sergio Luis Pinto da Matta, Reggiani Vilela Goncalves, Elad Tako, Hercia Stampini Duarte Martino, Ceres Mattos Della Lucia
Summary: The study found that the combination of whey protein concentrate and curcumin could reduce inflammation and oxidative damage in muscle tissue during an exhaustive swimming test.
Article
Immunology
Agata Lopes-Ribeiro, Franklin Pereira Araujo, Patricia de Melo Oliveira, Lorena de Almeida Teixeira, Geovane Marques Ferreira, Alice Aparecida Lourenco, Laura Cardoso Correa Dias, Caio Wilker Teixeira, Henrique Morais Retes, Elisson Nogueira Lopes, Alice Freitas Versiani, Edel Figueiredo Barbosa-Stancioli, Flavio Guimaraes da Fonseca, Olindo Assis Martins-Filho, Moriya Tsuji, Vanessa Peruhype-Magalhaes, Jordana Grazziela Alves Coelho-dos-Reis
Summary: This study aimed to identify MHC-I-restricted peptide signatures for arboviruses using in silico and in vitro peptide microarray tools. The results showed that there were few overlapping immunogenic peptides between different arboviruses, with DENV-derived peptides showing the highest reactivity with HLA-A*02:01. Additionally, non-structural proteins were identified as hotspots for HLA-A*02:01-reactive peptides.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Biology
Guilherme M. J. Costa, Samyra M. S. N. Lacerda, Andre F. A. Figueiredo, Natalia T. Wnuk, Marcos R. G. Brener, Lidia M. Andrade, Gabriel H. Campolina-Silva, Andrea Kauffmann-Zeh, Lucila G. G. Pacifico, Alice F. Versiani, Maisa M. Antunes, Fernanda R. Souza, Geovanni D. Cassali, Andre L. Caldeira-Brant, Helio Chiarini-Garcia, Fernanda G. de Souza, Vivian V. Costa, Flavio G. da Fonseca, Mauricio L. Nogueira, Guilherme R. F. Campos, Lucas M. Kangussu, Estefania M. N. Martins, Loudiana M. Antonio, Cintia Bittar, Paula Rahal, Renato S. Aguiar, Barbara P. Mendes, Marcela S. Procopio, Thiago P. Furtado, Yuri L. Guimaraes, Gustavo B. Menezes, Ana Martinez-Marchal, Kyle E. Orwig, Miguel Brieno-Enriquez, Marcelo H. Furtado
Summary: The SARS-CoV-2 virus has a higher affinity for the testes and can maintain its replicative and infective abilities for a prolonged period. Testicular alterations observed include angiogenesis, inflammation, and fibrosis. These findings suggest that critically ill patients may experience severe testicular pathogenesis with active viral presence.
Article
Medicine, General & Internal
Alice F. Versiani, Antoinette Kabore, Ludovic Brossault, Loic Dromenq, Thayza M. I. L. dos Santos, Bruno H. G. A. Milhim, Cassia F. Estofolete, Assana Cisse, Pegdwende Abel Sorgho, Florence Senot, Marie Tessonneau, Serge Diagbouga, Mauricio L. Nogueira
Summary: This study evaluated the performance of the VIDAS(R) dengue immunoassays in diagnosing dengue virus infections. The results showed that these immunoassays have high accuracy and stability in detecting NS1 antigen and anti-DENV IgM and IgG antibodies. They are suitable for the accurate diagnosis of dengue infections in endemic regions.
Article
Microbiology
Jessica Duarte da Silva, Lene Bens, Adriele J. do Carmo Santos, Rob Lavigne, Jose Soares, Luis D. R. Melo, Marta Vallino, Roberto Sousa Dias, Zuzanna Drulis-Kawa, Sergio Oliveira de Paula, Jeroen Wagemans
Summary: Proteus mirabilis is a significant pathogen causing catheter-associated urinary tract infections (CAUTIs). Two phages, BigMira and MidiMira, were studied and found to have similarities with four missense mutations impacting their depolymerase activity. Analysis of clinical P. mirabilis strains revealed differences in antibiotic resistance profiles and lipopolysaccharide locus, explaining phages' host range. The presence of antimicrobial resistance genes poses challenges for treating infections caused by multidrug-resistant bacteria.
Article
Medicine, Research & Experimental
Cecilia Artico Banho, Livia Sacchetto, Guilherme Rodrigues Fernandes Campos, Cintia Bittar, Fabio Sossai Possebon, Leila Sabrina Ullmann, Beatriz de Carvalho Marques, Gislaine Ceslestino Dutra da Silva, Marilia Mazzi Moraes, Maisa Carla Pereira Parra, Andreia Francesli Negri, Ana Carolina Boldrin, Michela Dias Barcelos, Thayza M. I. L. dos Santos, Bruno H. G. A. Milhim, Leonardo Cecilio Rocha, Fernanda Simoes Dourado, Andresa Lopes dos Santos, Victoria Bernardi Ciconi, Caio Patuto, Alice Freitas Versiani, Rafael Alves da Silva, Edoardo Estevam de Oliveira Lobl, Victor Miranda Hernandes, Nathalia Zini, Carolina Colombelli Pacca, Cassia Fernanda Estofolete, Helena Lage Ferreira, Paula Rahal, Joao Pessoa Araujo Jr, Jamie A. Cohen, Cliff C. Kerr, Benjamin M. Althouse, Nikos Vasilakis, Mauricio Lacerda Nogueira
Summary: The emergence of the Brazilian Gamma variant has impacted the epidemiological profile of COVID-19 cases, with higher transmissibility and immune evasion ability. The study showed that the Gamma variant rapidly increased in prevalence two months after its first detection in Sao Paulo, Brazil, and displaced seven circulating variants. Additionally, it was associated with increased mortality risk and severity of COVID-19 cases in younger age groups.
COMMUNICATIONS MEDICINE
(2022)
Meeting Abstract
Public, Environmental & Occupational Health
Alice Freitas Versiani, Irene Bosch, Leonardo A. Trigo, Matheus H. Avila, Andreia F. Reis, Andresa L. Santos, Fernanda S. Dourado, Beatriz C. Marques, Nathalia Zini, Cassia F. Estofolete, Flavio G. Da Fonseca, Lee Gehrke, Nikos Vasilakis, Mauricio L. Nogueira
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
(2021)
Meeting Abstract
Public, Environmental & Occupational Health
Guilherme R. Campos, Cintia Bittar, Alice Versiani, Cecilia A. Banho, Marilia M. Moraes, Thayza M. dos Santos, Joao P. Araujo Junior, Paula Rahal, Mauricio L. Nogueira
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
(2021)
Article
Biotechnology & Applied Microbiology
Roberto S. Dias, Michelle D. Teixeira, Mariana F. Xisto, John W. O. Prates, Jessica D. Da Silva, Iago O. Mello, Cynthia C. Da Silva, Sergio O. De Paula
Summary: The study focused on improving a DNA vaccine containing a truncated DENV-2 envelope protein and evaluating the impact of prM glycoprotein polymorphism on E protein immunogenicity. Results showed that DENV-3 prM had a greater influence on E protein immunogenicity, potentially due to its role as a chaperone, leading to increased presentation efficiency of produced transcripts.
HUMAN VACCINES & IMMUNOTHERAPEUTICS
(2021)