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Structural effects induced by dialysis-based purification of carbon nanomaterials

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Nano Materials Science 2024年第4期6卷 475-483页

作者： A.D.Veloso A.M.Ferraria A.M.botelho do Rego A.S.Viana A.J.S.Fernandes A.J.Fielding R.A.Videira M.C.Oliveira CQ-VR and Chemistry Department University of Trás-os-Montes e Alto Douro BSIRG iBB-Institute for Bioengineering and BiosciencesDepartment of Chemical Engineeringand Associate Laboratory i4HB-Institute for Health and BioeconomyInstituto Superior TécnicoUniversidade de Lisboa Centro de Química Estrutural Institute of Molecular SciencesDepartamento de Química e BioquímicaFaculdade de CiênciasUniversidade de Lisboa I3N and Physics Department University of AveiroCampus de Santiago Faculty of Science Pharmacy and Biomolecular SchoolLiverpool John Moores University REQUIMTE/LAQV Laborat orio de FarmacognosiaDepartamento de QuímicaFaculdade de Farm aciaUniversidade do Porto

Dialysis plays a crucial role in the purification of nanomaterials but its impact on the structural properties of carbon nanomaterials was never ***,a carbon-based nanomaterial generated electrochemically in potassium phosphate buffer,was characterized before and after dialysis against pure *** is shown that dialysis affects the size of the carbon domains,structural organization,surface functionalization,oxidation degree of carbon,and grade of ***,dialysis drives the nanomaterial organization from discrete roundish carbon domains,with sizes ranging from 70 to 160 nm,towards linear stacking structures of small nanoparticles （<15 nm）.In parallel,alcohol and ether （epoxide） surface groups evolve into more oxidized carbon groups （e.g.,ketone and ester groups）.Investigation of the as-prepared nanomaterial by electron paramagnetic resonance （EPR） revealed a resonance signal consistent with carbon-oxygen centred ***,this study brings to light the selective affinity of the carbon nanomaterial under study to capture Na+ions,a property greatly enhanced by the dialysis process,and its high ability to trap oxygen,particularly before *** findings open new perspectives for the application of carbon-based nanomaterials and raise awareness of the importance of structural changes that can occur during the purification of carbon-based nanomaterials.

关键词： Nanocarbon Surface functionalization NMR XPS Hydrophilic carbon Paramagnetic

Challenges and improvements in testosterone and estradiol testing

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Asian Journal of Andrology 2014年第2期16卷 178-184,I0006,I0007页

作者： Hubert W Vesper Julianne C botelho Yuesong Wang Clinical Chemistry Branch Division of Laboratory Sciences Centers for Disease Control and Prevention Atlanta Georgia USA.

Assays that measure steroid hormones in patient care, public health, and research need to be both accurate and precise, as these criteria help to ensure comparability across all clinical and research applications. This review addresses major issues relevant to assay variability and describes recent activities by the US Centers for Disease Control and Prevention （CDC） to improve assay performance. Currently, high degrees of accuracy and precision are not always met for testosterone and estradiol measurements; although technologies for steroid hormone measurement have advanced significantly, measurement variability within and across laboratories has not improved accordingly. Differences in calibration and specificity are discussed as sources of variability in measurement accuracy. Ultimately, a combination of factors appears to cause inaccuracy of steroid hormone measurements, with nonuniform assay calibration and lack of specificity being two major contributors to assay variability. Within-assay variability for current assays is generally high, especially at low analyte concentrations. The CDC Hormone Standardization （HoSt） Program is improving clinical assays, as evidenced by a 50% decline in mean absolute bias between mass spectrometry assays and the CDC reference method from 2007 to 2011. This program provides the measurement traceability to CDC reference methods and helps to minimize factors affecting measurement variability.

关键词： CDC hormone standardization CDC HoSt estradiol steroid hormone testing testosterone

The use of computational thermodynamic for yttrium recovery from rare earth elements-bearing residue

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Journal of Rare Earths 2021年第2期39卷 201-207页

作者： Amilton Barbosa botelho Junior Denise Crocce Romano Espinosa Jorge Alberto Soares Tenorio Department of Chem ical Engineering Polytechnic SchoolUniversity of Sao PauloSao PauloBrazil

The rare earth elements are considered critical metals,due to the risk of supply *** recycling of waste electrical and electronic equipment can be an alternative to supply the rare earth *** processes have been developed,and by aqueous media is the most prominent,which makes possible the extraction and separation of elements even in low concentration(traces).As an example of thermal processing,the use of thermodynamic simulations might benefit the metal extraction in hydrometallurgical *** this reason,the goal of this work is to evaluate the use of FactSage 7.2 software for the leaching of fluorescent lamp powders by sulfuric *** effect of concentration and temperature was *** comprise that the thermodynamic software wellpredicted the solid phase formed in all residues of leaching experiments-gypsum was predicted by the software and identified in XRD *** demonstrates that FactSage software can be explored for metals extraction in aqueous media,being important for trace-elements *** extraction reaches up to 95%at 45℃using H_(2)SO_(4)2 mol/L.

关键词： Yttrium Lanthanum Cerium WEEE FactSage Rare earths

Cell-free therapy:a neuroregenerative approach to sensory neuropathy?

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Neural Regeneration Research 2019年第8期14卷 1383-1384页

作者： Afranio Ferreira Evangelista Milena botelho Pereira Soares Cristiane Flora Villarreal Instituto Gongalo Moniz Fundacao Oswaldo Cruz Salvador BA Brazil Faculdade de Farmacia Universidade Federal da Bahia Salvador BA Brazil

Stem cells are considered as key therapeutic tools in the field of regenerative medicine. In the last decade, based on a growing body of knowledge about their mechanisms of action, a new way of exploring the therapeutic potential of stem cells without the need for cell transplantation has been evidenced. This approach, called cell-free therapy, uses stem cells as a source of therapeutic molecules rather than the therapeutic agent per se, and several studies have shown relevant therapeutic effects under a variety of experimental conditions, including nervous system disorders.

关键词： Cell-free therapy neuroregenerative approach sensory neuropathy

Kinetic modeling of adsorption of vanadium and iron from acid solution through ion exchange resins

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Transactions of Nonferrous Metals Society of China 2022年第7期32卷 2438-2450页

作者： JoséHelber VINCO Amilton Barbosa botelho JUNIOR Heitor Augusto DUARTE Denise Crocce Romano ESPINOSA Jorge Alberto Soares TENÓRIO Department of Chemical Engineering Polytechnic School of the University of São Paulo(USP)Rua do Lago25005508-080São PauloSPBrazil

This study assessed the adsorption process and the reaction kinetics involved in the selective recovery of vanadium from an acid solution containing iron as an *** commercial resins were studied:Lewatit^(®)MonoPlus TP 209 XL,Lewatit^(®) TP 207,Dowex^(TM)M4195(chelating resin)and Lewatit^(®) MonoPlus S 200 H(strong cationic exchange resin).To investigate the effect of time on the adsorption process,batch experiments were carried out using the following initial conditions:pH 2.0,298 K,and a proportion of 1 g of resin to 50 mL of *** variation of pH over time was *** resin released less H+ions as the adsorption occurred,resulting in a lower drop of pH when compared to S 200 H *** adsorption by the resins was also evaluated through FT-IR and SEM−EDS before and after the *** the evaluated kinetic models(pseudo-first order,pseudo-second order,Elovich and intraparticle diffusion models),the pseudo-second order model best fits the experimental data of the adsorption of vanadium and iron by all of the four resins.M4195 resin showed the highest recovery of vanadium and the lowest adsorption of *** data,which are fundamental to industrial processes applications,are provided.

关键词： vanadium recovery adsorption chelating resins metal ions cation exchange resin batch experiments

The role of mouse models in colorectal cancer research—The need and the importance of the orthotopic models

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Animal Models and Experimental Medicine 2020年第1期3卷 1-8页

作者： Rui C.Oliveira Ana Margarida Abrantes JoseGuilherme Tralhao Maria Filomena botelho Biophysics Unit Faculty of MedicineUniversity of CoimbraCoimbraPortugal Pathology Department University Hospital(CHUC)CoimbraPortugal Centre of Investigation on Environment Genetics and Oncobiology(CIMAGO)CoimbraPortugal Surgery A Department Faculty of MedicineUniversity Hospital(CHUC)CoimbraPortugal

Colorectal cancer is a worldwide health burden,with high incidence and mortality,especially in the advanced stages of the *** models are very important and valuable to discover and validate early and specific biomarkers as well as new therapeutic *** order to accomplish that,the animal models must replicate the clinical evolution of the disease in all of its *** this article,we review the existent mouse models,with their strengths and weaknesses in the replication of human cancer disease progression,with major focus on orthotopic models.

关键词： colorectal cancer mouse model orthotopic model

Auriculotherapy in primary health care: A large-scale educational experience in Brazil

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Journal of Integrative Medicine 2019年第4期17卷 302-309页

作者： Charles Dalcanale Tesser Ari Ojeda Ocampo More Melissa Costa Santos Emiliana Domingues Cunha da Silva Fatima Terezinha Pelachini Farias Lucio Jose botelho Department of Public Health Federal University of Santa Catarina Floriandpolis Santa Catarina 88036-800 Brazil Post-graduate Program in Public Health Federal University of Santa Catarina Florianopolis Santa Catarina 88036-800 Brazil Integrative Medicine and Acupuncture Service University Hospital Federal University of Santa Catarina Floriandpolis Santa Catarina 88036-800 Brazil Floriandpolis Municipality Health Office Florianopolis Santa Catarina 88036-800 Brazil

Auriculotherapy consists of physical stimuli applied to the outer ear and is commonly associated with traditional Chinese medicine (TCM). The authors present and discuss the development of a course that offers a semi-on-site auriculotherapy course for Brazilian primary health care (PHC) professionals. The course was funded by the Brazilian Ministry of Health and developed at the Federal University of Santa Catarina in 2015 by a team of experts in auriculotherapy. It consisted of 75 h of distance learning (five sequential modules) and 5 h of on-site learning. The modules included the following items:(1) introduction to integrative practices;(2) ear reflexology;(3) introduction to TCM;(4) biomedical view of auriculotherapy;and (5) auriculotherapy in PHC. The teaching material in eluded a workbook for each module, 14 video lectures and an interactive ear(on line resource) to study location and application to the main auricular points. The on-site lectures follow a structured script of ear palpation techniques, auricular seed insertion practice and clinical case discussions, under the supervision of trained instructors. The course was offered in 2016 and 2017 and on-site lectures took place in 25 cities, covering all Brazilian regions, in coordination with municipal or state boards of health. A total of 4273 health professionals concluded the training and their evaluation of the course was highly positive. The Brazilian experience of large-scale training shows the potential to disseminate auriculotherapy in the context of PHC, given that its practice is fast, easy to learn, safe, effective for different health problems and well accepted by the patients.

关键词： Auriculotherapy Traditional Chinese medicine Primary health care Health education Distance learning

Effect of solidification process parameters on dry sliding wear behavior of AlNiBi alloy

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Transactions of Nonferrous Metals Society of China 2020年第3期30卷 582-594页

作者： T.M.botelho H.M.AZEVEDO G.H.MACHADO C.R.BARBOSA F.S.ROCHA T.A.COSTA O.L.ROCHA Federal Institute of Education Science and Technology of ParáIFPAAlmirante Barroso Avenue 115566093-020 BelémPABrazil Institute of Technology Federal University of ParáUFPAAugusto Correa Avenue 166075-110 BelémPABrazil

As-cast samples of the Al-3wt.%Ni-lwt.%Bi alloy resulting from the horizontal directional solidification process were subjected to the micro-abrasive wear *** effects of the solidification thermal and microstructural parameters,such as the growth and cooling rates and the cellular and primary dendritic spacings(VL and TR;λ1 and λc;respectively),were evaluated in the wear resistance of the investigated *** tribological parameters analyzed were the wear volume and rate(Vw and Rw).The solidification experiments and the wear tests were carried out by means of a water-cooled horizontal directional solidification device and a rotary-fixed ball wear machine,*** results show lower Vw and Rw values correspond to finer microstructures and the Vw dependence on λ1 is characterized by an experimental mathematical equation.A better distribution of Bi soft droplets and Al3Ni hard intermetallic particles is observed within the finer interdendritic region and,in consequence,the better wear resistance is achieved in as-cast samples with dendritic morphology rather than cellular morphology.A transition of wear mechanism from adhesive to abrasive is observed.

关键词： unsteady-state horizontal solidification dry sliding wear cellular/dendrite arm spacing microhardness Bi particle Al_(3)Ni particle

Ileal intussusception due to a parasite egg: A case report

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World Journal of Gastroenterology 2014年第36期20卷 13191-13194页

作者： José Pedro Pinto Agostinho Cordeiro Ana Margarida Ferreira Conceio Antunes Patrícia botelho Ana Joo Rodrigues Pedro Leo Department of General Surgery Hospital of Braga 2242 Apartado Portugal Servi?o de Anatomia Patológica Hospital de Braga 2242 Apartado Portugal Life and Health Sciences Research Institute (ICVS) School of Health Sciences University of Minho Braga 2242 Apartado Portugal ICVS/3B’s-PT Government Associate Laboratory Braga/Guimar?es 2242 Apartado Portugal

Ileal intussusception is the invagination of the small intestine within itself and accounts for 1% of cases of acute obstruction. However, physicians do not initially consider intussusception as a possible diagnosis of obstruction due to its rarity in adults. Herein, we report the case of a 22-year-old male who was admitted to the Emergency Department with continuous abdominal pain. Ultrasonography and computed tomography revealed an ileal intussusception. The patient underwent surgical removal of the segment of the small bowel. Unexpectedly, pathology revealed that the invagination occurred due to a parasite egg, with features suggestive of Schistosoma species. Schistosomiasis, although considered a parasitic disease in tropical countries, is not absent from Europe and though it is highly improbable, it may be responsible for cases of intussusception in adults.

关键词： Ileal intussusception Parasite egg Bowel obstruction Schistosoma Abdominal pain