ABSTRACT Biochar can promote crop production and soil quality. However, its characteristics depend on the waste used in its production and its effects may vary according to the species being cultivated and the management adopted. The aim of this study was to evaluate the application of biochar from animal waste on soil quality and the agronomic characteristics of the cowpea. An experiment was set up to test three types of biochar (bovine-BB, swine-SB and poultry-BP), with added fertiliser (BBF, SBF and BPF) and two control treatments, including the addition of calcium magnesium oxide (CT) and calcium magnesium oxide with fertiliser (CTF), giving a total of eight treatments with four replications. There was a respective increase of up to 102.94%, 1048%, 1560% and 360.22% in stem diameter, number of pods, number of grains per pod and stem dry matter from adding the biochar. The poultry biochar increased each of the above parameters even with no added fertiliser. There was no difference in basal soil respiration or β-glucosidase enzyme activity, whereas organic carbon (TOC), total nitrogen (TN), microbial carbon and soil labile carbon were greater with biochar. BBF gave the highest TOC content (24.40 g kg-1), while BP and BPF increased TN by around 61%. The application of biochar + fertiliser contributed to an average reduction of 56% in the soil metabolic quotient. Poultry biochar favoured both the agronomic characteristics of the cowpea and soil quality, while bovine biochar showed more marked results with the addition of fertiliser. However adopted bovineBB, bovineBB BB, BB (bovine-BB swineSB swine SB poultryBP, poultryBP , poultry-BP) BBF, (BBF CT (CT CTF, CTF (CTF) replications 10294 102 94 102.94% 1048 1048% 1560 36022 360 22 360.22 diameter pods βglucosidase β glucosidase activity TOC, (TOC) TN, (TN) 24.40 2440 24 40 (24.4 kg1, kg1 kg 1 kg-1) 61 61% 56 quotient poultry-BP (CTF 1029 10 9 102.94 104 156 3602 36 2 360.2 (TOC (TN 24.4 244 4 (24. kg-1 6 5 102.9 15 3 360. 24. (24 kg- 102. (2 (

Phosphate species can affect aquatic ecosystems, as excess of this nutrient can cause eutrophication, generating environmental impacts. Lamellar double hydroxides have shown promise in removing phosphate at low concentrations (10-50 mg L 1). In this context, lamellar double hydroxides were synthesized interspersed with nitrates and humic substances, searching for a new product that favors phosphorus adsorption. X-ray diffraction showed the presence of characteristic peaks of lamellar double hydroxides and thermogravimetric analysis showed the decomposition behavior of lamellar structure. The adsorption capacity occurred quickly (< 30 min), being more efficient for lamellar double hydroxides with NO3. The maximum adsorption capacity showed results of 35.03 and 44.20 mg g 1 for lamellar double hydroxides with humic substances and lamellar double hydroxides with NO3, respectively. The complexation capacity showed that pH directly influences complexation, being greater for lamellar double hydroxides with humic substances at pH 6.5. Thus, nanostructured materials with humic substances are promising for use in contaminant remediation and adsorption can be a fast and efficient technique for use in soil and water. ecosystems eutrophication impacts 1050 10 50 (10-5 1. . 1) context Xray X ray structure < ( 3 min, min , min) NO3 NO 3503 35 03 35.0 4420 44 20 44.2 respectively 65 6 5 6.5 Thus water 105 (10- 350 0 35. 442 4 2 44. 6. (10 (1

The present work focused on the screening process of different inorganic oxides and different temperatures for the epoxidation reaction of macaw palm vegetable oil without using solvent, a promising Brazilian biomass that can substitute other vegetable oils (e.g., soybean oil) in technological applications. This oil has an iodine value of 108.48 g of I2 per 100 g being categorized as a semi-dry oil. The epoxidized vegetable oil can be applied in manifold areas in polymer science. The epoxidation reaction here presented avoided organic solvents and organic acids and aimed to produce a greener route using metal oxides or niobium phosphate as a peroxide-activating catalyst. The experimental parameters were maintained as 10 mol% of catalyst loading and a time of 24 h; however, the temperature for some catalysts was changed to improve the epoxide conversion. Experiments were measured by proton nuclear magnetic resonance (1H NMR). Experiments using titanium oxide (TiO2) as a catalyst reached a conversion greater than 84.7%, while experiments using aluminium oxide (Al2O3) or lanthanum oxide (La2O3) achieved conversions of 22.6 and 30.1%, respectively. Furthermore, it was observed that both niobium compounds instantly react with hydrogen peroxide to form peroxy derivatives. solvent e.g., eg e (e.g. applications 10848 108 48 108.4 I semidry semi dry science peroxideactivating activating 1 mol 2 h however 1H H NMR. NMR . NMR) TiO2 TiO (TiO2 847 84 7 84.7% Al2O3 AlO Al O (Al2O3 La2O3 LaO La (La2O3 226 22 6 22. 301 30 30.1% respectively Furthermore derivatives e.g. (e.g 1084 4 108. (TiO 8 84.7 Al2O (Al2O La2O (La2O 3 30.1 e.g 84. 30.

RESUMO Objetivo: Identificar e caracterizar a população de casos pediátricos encaminhados para o nosso centro de oxigenoterapia hiperbárica. Métodos: Estudo retrospetivo e observacional, que incluiu doentes pediátricos tratados com oxigenoterapia hiperbárica, de 2006 a 2021, no centro de referência de medicina hiperbárica do norte de Portugal. As variáveis de interesse foram extraídas dos processos clínicos eletrônicos. Resultados: O nosso estudo incluiu 134 casos. Os motivos de encaminhamento mais frequentes foram intoxicação por monóxido de carbono (n=59) e surdez súbita neurossensorial (n=41). Em 75 casos (56%) o tratamento foi iniciado em contexto de urgência. Os sintomas de apresentação à admissão variaram entre os diferentes casos, sendo os mais frequentes cefaleias e náuseas/vômitos. No que diz respeito à intoxicação por monóxido de carbono, as fontes mais comuns foram o aquecedor, lareira/braseiro e caldeira. Com relação aos efeitos adversos, foram identificados um caso de intoxicação por oxigênio e quatro casos de barotrauma do ouvido médio. Conclusões: A causa mais frequente de encaminhamento foi a intoxicação por monóxido de carbono. Todos os pacientes evoluíram favoravelmente e foram registrados poucos efeitos adversos, o que enfatiza a segurança desta terapia. Uma vez que a maioria dos pediatras pode não estar informada sobre os potenciais benefícios da oxigenoterapia hiperbárica, é de extrema importância promovê-los para que esta técnica seja cada vez mais implementada. Objetivo Métodos observacional 200 2021 Portugal eletrônicos Resultados 13 n=59 n59 n 59 (n=59 n=41. n41 n=41 . 41 (n=41) 7 56% 56 (56% urgência náuseasvômitos náuseas vômitos náuseas/vômitos aquecedor lareirabraseiro lareira braseiro caldeira adversos médio Conclusões terapia promovêlos promovê los implementada 20 202 1 n=5 n5 5 (n=5 n4 n=4 4 (n=41 (56 2 n= (n= (n=4 (5 (n (

ABSTRACT Objective: To identify and characterize the population of Pediatric patients referred to our hyperbaric oxygen therapy center. Methods: Retrospective and observational study, including pediatric patients treated with hyperbaric oxygen therapy, from 2006 to 2021, at the hyperbaric medicine reference center in the north of Portugal. Variables of interest were extracted from electronic medical records. Results: Our study included 134 patients. The most frequent reasons for referral were carbon monoxide poisoning (n=59) and sudden sensorineural hearing loss (n=41). In 75 cases (56%), treatment was initiated in an urgent context. Symptom presentation at Emergency Department varied among patients, the most frequent being headache and nausea/vomiting. Concerning carbon monoxide poisoning, the most common sources were water heater, fireplace/brazier, and boiler. Regarding adverse effects, it was identified one case of intoxication by oxygen and four cases of middle ear barotrauma. Conclusions: The most frequent cause for referral was carbon monoxide poisoning. All patients evolved favorably, with few side effects being reported, emphasizing the safety of this therapy. While most pediatricians may not be aware of the potential benefits arising with hyperbaric oxygen therapy, it is of upmost importance to promote them, so that this technique is increasingly implemented. Objective Methods 200 2021 Portugal records Results 13 n=59 n59 n 59 (n=59 n=41. n41 n=41 . 41 (n=41) 7 56%, 56 56% , (56%) context nauseavomiting nausea vomiting nausea/vomiting heater fireplacebrazier fireplace brazier fireplace/brazier boiler barotrauma Conclusions favorably reported them implemented 20 202 1 n=5 n5 5 (n=5 n4 n=4 4 (n=41 (56% 2 n= (n= (n=4 (56 (n (5 (

The in silico study aimed to suggest phytochemicals from Commiphora leptophloeos leaves essential oil as therapies against coronavirus disease (COVID-19) (or severe acute respiratory syndrome coronavirus 2, SARS-CoV-2). For that, we used molecular docking (MD), absorption, distribution, metabolism, excretion, and toxicity (ADMET) parameters, and pharmacokinetic analysis. MD showed the presence of hydrophobic and hydrogen bonds for nine compounds. β-Selinene and bicyclogermacrene showed the best interaction values with the protein Mpro (ID: 6Y2F) (-5.9) and chimeric receptor complexed with its receptor human ACE2 (ID: 6VW1) (-6.1 and -5.5) proteins, as well as low gastrointestinal and high epithelial absorptions, medium permeability for Caco-2 cells and high epithelial permeability, low oral excretion, and were inhibitors of CYP2C19 and CYP2C9 enzymes. On the other hand, both were not permeable to the blood-brain barrier and inhibitors or substrates for glycoprotein-D, and showed carcinogenic potential, but only β-selinene was considered mutagenic. Although little bioavailable, both presented aspects structurally adequate, being compounds with moderate synthesis difficulty. Therefore, more analyses are necessary to evaluate the mechanism of action and unsatisfactory parameters foreseen in bioinformatic assays. COVID19 COVID 19 (COVID-19 2 SARSCoV2. SARSCoV2 SARSCoV SARS CoV . SARS-CoV-2) that MD, , (MD) absorption distribution metabolism excretion ADMET (ADMET analysis βSelinene β Selinene ID (ID 6Y2F YF Y F 5.9 59 5 9 (-5.9 ACE 6VW1 VW 6.1 61 6 1 (-6. 5.5 55 -5.5 proteins absorptions Caco2 Caco Caco- CYPC CYP C CYP2C1 CYP2C enzymes hand bloodbrain blood brain glycoproteinD, glycoproteinD glycoprotein D, D glycoprotein-D potential βselinene selinene mutagenic bioavailable adequate difficulty Therefore assays COVID1 (COVID-1 SARS-CoV-2 (MD 5. (-5. 6VW 6. (-6 -5. (COVID- SARS-CoV- (-5 (- -5 (COVID SARS-CoV ( -

ABSTRACT The correct use of tyres on agricultural tractors, in respect of the terrain and the type and internal pressure of the tyre, are factors that influence the performance of the tractor. The aim of the present study was to evaluate the operating performance of an agricultural tractor fitted with two types of traction device (radial and diagonal tyres) at different pressures, and operating on soil with two levels of moisture. The experiment was conducted on a dystrophic Red Yellow Argisol, with tests to evaluate the performance of the tyres under specific working conditions. Tractive power and tractive force, wheel slip and fuel consumption were evaluated. For each of the conditions under evaluation, the radial configuration showed better performance than the diagonal configuration, the effect being more significant at the lower pressure and under low soil moisture. The use of radial tyres led to an increase in traction capacity and drawbar power, with a reduction in fuel consumption, especially at higher slip rates. tractors tyre pressures moisture Argisol force evaluated evaluation rates

ABSTRACT Cobalt (Co) and molybdenum (Mo) are essential elements with a fundamental role in biological nitrogen fixation in legumes. Vitamins such as thiamine, despite being required in small quantities, influence plant growth. This study aimed to assess the efficiency of different doses of thiamine applied as seed treatment, combined or not with Co and Mo, in enhancing the development of soybean crops. The experiment was conducted in a greenhouse according to a randomized block design with a 6 × 2 factorial arrangement, comprising six thiamine doses (0, 10, 25, 50, 100, and 200 mg kg-1) in the presence or absence of Co and Mo at the recommended rate of 100 mL ha-1. At 40 days after sowing, plants were analyzed for root length, root dry weight, shoot length, shoot dry weight, nodule number, and nodule dry weight. Principal component analysis showed that combined application of Co and Mo with thiamine was negatively associated with all variables and that the thiamine doses most positively associated with the analyzed variables were 50 and 200 mg kg-1. In treatments containing thiamine alone, there was a linear direct relationship between thiamine dose and nodule dry weight. Root and shoot lengths and dry weights were highest in plants treated with thiamine only at a dose of 122 mg kg-1. Application of Co and Mo combined with thiamine via seed treatment does not promote the development of soybean crops. Thiamine application is a promising treatment to increase shoot length, root dry weight, and nodule dry weight in soybean. (Co (Mo legumes quantities growth crops arrangement 0, 0 (0 10 25 20 kg1 kg 1 kg-1 ha1. ha1 ha 1. ha-1 4 sowing length number 5 kg1. alone 12 ( kg- ha-

In the present study a spectrophotometric method for Cr(VI) determination in organic fertilizers, especially those from tanning industry residues, is proposed. Conditions for chromium extraction, extract clean-up and analytical characteristics of the method were established. The method is based on the complexation of Cr(VI) with 1,5-diphenylcarbazide (DPC) in acid medium (pH 2.0). A mixture of NaOH and Na2CO3 solution at 0.125 and 0.07 mol L–1 (pH 12), respectively, and heating at 90 °C for 60 min were the best conditions for chromium extraction. Florisil and activated charcoal were tested for clean-up of the extract, with activated charcoal being effective. Under the established conditions, the calibration linear range is up to 2500 μg L–1 Cr(VI), the results obtained are in agreement with the value of a certified reference material (CRM041), precision is better than 5% for five consecutive determinations of a solution at 1000 μg L–1 of Cr(VI) and the limit of quantification is 1.62 μg g–1. In can be concluded that the method is robust, accurate and precise, and can be easily applied for the determination of Cr(VI) in routine analysis, since it complies with legislation of most countries regarding the maximum allowed concentration of 2 μg g–1 of Cr(VI). CrVI Cr VI Cr(VI fertilizers residues proposed extraction cleanup clean 1,5diphenylcarbazide 15diphenylcarbazide diphenylcarbazide 1,5 1 5 DPC (DPC pH 2.0. 20 2.0 . 0 2.0) NaCO Na CO Na2CO 0125 125 0.12 007 07 0.0 L1 L L– 12, 12 , 12) respectively 9 C 6 effective 250 CrVI, CRM041, CRM041 CRM (CRM041) 100 162 62 1.6 g1 g robust precise analysis g– CrVI. 5diphenylcarbazide 15 1, 2. 012 0.1 00 0. 25 CRM04 (CRM041 10 16 1. 01 CRM0 (CRM04 (CRM0 (CRM

The emergence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) stands for being the most serious epidemic (so far) of the 21st century. However, only a few computational studies have investigated the molecular mechanisms underlying the neutralization of the spike protein by antibodies of different classes. Hence, bioinformatic methods were employed to unravel the factors contributing to the remarkable neutralization capacity exhibited by specific antibodies. Initially, crystallographic structures of IgA monomeric / dimeric, IgG, and IgM antibodies binding with the receptor-binding domain region of the SARS-CoV-2 spike protein were retrieved. Subsequently, rigid molecular docking and molecular dynamic simulations were performed over 100 ns with explicit water solvation. Lastly, an energy decomposition was conducted to estimate the binding affinity using the last frames from molecular dynamics. The results revealed a higher binding affinity for both monomeric and dimeric forms of IgA antibodies against the spike protein. Additionally, a greater number of hydrogen bonds were observed during their interaction with the spike protein, as well as greater structural instability along the time and especially a more thermodynamically favorable interaction affinity. In this way, the research contributes a small piece to the complex puzzle of understanding the humoral immune response induced by the SARS-CoV-2 virus. SARSCoV2 SARSCoV SARS CoV (SARS-CoV-2 so far st century However classes Hence Initially IgG receptorbinding receptor SARS-CoV- retrieved Subsequently 10 solvation Lastly dynamics Additionally way virus (SARS-CoV- SARS-CoV 1 (SARS-CoV

The present study analyzed the chemical composition and phytotoxic activity of Artemisia lancea essential oil (EO). Gas chromatography-mass spectrometry (GC-MS) results showed the presence of 55 compounds, representing 82.36% of the entire EO, with eucalyptol (18.7%) being the most abundant constituent. Phytotoxic bioassay results indicated that the EO (concentration ranging from 0.25-5 mg mL−1) inhibited the growth of Amaranthus retroflexus and Setaria viridis. Root length of A. retroflexus and S. viridis were reduced with the increasing concentration of the EO, especially when the EO was applied at 1-5 mg mL−1. When treated with 1-5 mg mL−1 EO, shoot length of A. retroflexus and S. viridis were also significantly suppressed. The half maximal inhibitory concentration (IC50) values for inhibiting root and shoot growth of A. retroflexus by the EO were 0.284 and 0.246 mg mL−1; for S. viridis, the EO showed IC50 values of 0.44 and 0.262 mg mL−1 for root and shoot inhibition, respectively. The most promising findings were observed when A. lancea EO concentration reached 1 mg mL−1 and higher, which completely inhibited seed germination of A. retroflexus and S. viridis. These findings suggest A. lancea EO has potential as an eco-friendly bioherbicide for agricultural weed control. EO. . (EO) chromatographymass chromatography mass GCMS GC MS (GC-MS 5 compounds 8236 82 36 82.36 18.7% 187 18 7 (18.7% constituent 0.255 0255 0.25 0 25 0.25- mL1 mL A S 15 1- mL− suppressed IC (IC50 0284 284 0.28 0246 246 0.24 IC5 044 44 0.4 0262 262 0.26 inhibition respectively higher ecofriendly eco friendly control (EO 823 8 3 82.3 18.7 (18.7 255 025 0.2 2 (IC5 028 28 024 24 04 4 0. 026 26 82. 18. (18. 02 (IC (18 (1 (

Resumen: Con la crisis del petróleo de principios de la década del 70, vimos el inicio del fin de los "años dorados" del modelo burocrático, en la década siguiente el modelo ya estaba ampliamente desacreditado hasta el punto del modelo de reemplazo, Nueva Gestión Pública. (NGP), siendo visto como superior. Sin embargo, los académicos señalan que la NGP no es más que "creencias precientíficas" y Denhardt y Denhardt (2000) proponen el nuevo servicio público que, entre otros aspectos, tiene como objetivo superar el individualismo y el economicismo subyacentes a la NGP. Sin embargo, los supuestos del Nuevo Servicio Público se acercan a los que ha defendido Ubuntu. Por tanto, la pregunta es: qué es Ubuntu, cuáles son los presupuestos del nuevo servicio público y cuáles son sus puntos de convergencia. Basado en una metodología que combina una visión subjetivista y una epistemología del poscolonialismo, este estudio de caso de investigación cualitativa se basó técnicamente en la revisión de la literatura y el análisis del discurso. Se concluyó que las propuestas del nuevo servicio público convergen con los cimientos de Ubuntu y que, a pesar de ser epistemologías construidas en distintos lados de las fronteras, pueden dialogar y complementarse. Resumen 70 años dorados burocrático reemplazo Pública NGP, , (NGP) superior embargo creencias precientíficas 2000 (2000 aspectos tanto convergencia poscolonialismo discurso fronteras complementarse 7 (NGP 200 (200 20 (20 2 (2 (

Abstract: With the oil crisis at the beginning of the 70s, we saw the beginning of the end of the "golden years" of the bureaucratic model, in the following decade the model was already largely discredited, therefore, material and intellectual conditions led us to believe in and defend the superiority of the substitute model, New Public Management (NPM). However, scholars point out that NPM is nothing more than "pre-scientific beliefs" and Denhardt and Denhardt (2000) proposed the New Public Service (NPS) model which, among other aspects, aims to overcome the individualism and economism underlying NPM. However, the assumptions that shape the New Public Service propose the rescue of values that have been defended by Ubuntu for decades. The question is: what is Ubuntu, what are the assumptions of the new public service and what are its points of convergence. In ontological terms, this study adopts a subjectivist view and, epistemologically, it is anchored in post-colonialism. This is a case study associated with qualitative research that was technically based on literature review and discourse analysis. It was concluded that the proposals for the new public service converge with the foundations of Ubuntu and that, despite being epistemologies built on different sides of the borders, they can dialogue and complement each other. Abstract 70s s golden years discredited therefore . (NPM) However prescientific pre scientific beliefs 2000 (2000 NPS (NPS which aspects decades convergence terms epistemologically postcolonialism. postcolonialism post colonialism. colonialism post-colonialism analysis borders (NPM 200 (200 20 (20 2 (2 (

Resumo: Com a crise do petróleo no início da década de 1970, assistiu-se ao princípio do fim dos "anos dourados" do modelo burocrático. Na década seguinte, o modelo já estava amplamente desacreditado; por conseguinte, condições materiais e intelectuais levaram a crer e defender a superioridade do modelo substituto, a Nova Gestão Pública (NGP). No entanto, estudiosos apontam que a NGP não passa de "crenças pré-científicas", e Denhardt e Denhardt (2000) propuseram o modelo do Novo Serviço Público (NSP) que, dentre outros aspetos, visa superar o individualismo e o economicismo subjacente à NGP. No entanto, os pressupostos que fundamentam o NSP propõem o resgate de valores que há décadas são defendidos pelo Ubuntu. Questiona-se: o que é Ubuntu, quais são os pressuposto do Novo Serviço Público e quais são os seus pontos de convergência. Em termos ontológicos, este estudo adopta uma visão subjetivista e, epistemologicamente, ancora-se no pós-colonialismo. Este é um estudo de caso associado à pesquisa qualitativa que tecnicamente alicerçou-se na revisão da literatura e análise de discurso. Concluiu-se que as propostas do Novo Serviço Público convergem com os fundamentos do Ubuntu e que, a despeito de serem epistemologias construídas em lados diferentes das fronteiras, podem dialogar e se complementar. Resumo 1970 assistiuse assistiu anos dourados burocrático seguinte desacreditado conseguinte substituto . (NGP) entanto crenças précientíficas, précientíficas pré científicas , pré-científicas" 2000 (2000 (NSP aspetos Questionase Questiona Questiona-se convergência ontológicos epistemologicamente ancorase ancora póscolonialismo. póscolonialismo pós colonialismo. colonialismo pós-colonialismo alicerçouse alicerçou discurso Concluiuse Concluiu fronteiras complementar 197 (NGP pré-científicas 200 (200 19 20 (20 1 2 (2 (

Abstract There are several characteristics that influence fire resistance of load-bearing masonries, wherein stand out the bricks compressive strength. Verification of wall systems fire behavior was conducted as prescribed by NBR 5628. This research aims to comparatively analyze fire resistance in real scale load-bearing walls, considering thermal insulation, structural stability, and airtightness. The thickness of the coating and laying mortar were standardized for all specimens just varying brick geometry and septs design in blocks of EST 60, 100, and 140 class. The obtained results show that the compressive strength of the bricks can induce both the structural stability of the constructive systems and its thermal insulation, being a typically critical characteristic for clay brick walls in a building fire. The sample with the highest compressive strength obtained the shortest local displacement, contributing to mitigate the generation of fissures in the system, enhancing the thermal insulation of the clay brick wall, and, thereby, its fire resistance. loadbearing load bearing masonries 5628 airtightness 60 100 14 class displacement system thereby 562 6 10 1 56 5

Resumo Diversas características influenciam a resistência ao fogo de sistema de parede em alvenaria estrutural, dentre as quais pode se incluir sua resistência à compressão. O comportamento desse sistema é validado experimentalmente conforme a norma NBR 5628. Esse estudo tem como objetivo analisar comparativamente a resistência ao fogo obtida através de ensaios em escala real em alvenaria estrutural, envolvendo as características de isolamento térmico, estanqueidade a passagem de gases e fumaça e estabilidade estrutural. Foram avaliados componentes com a mesma configuração em termos de revestimento e assentamento, assumindo como variável a resistência a compressão dos blocos, tendo sido considerados neste estudo blocos de classe EST 60, 100 e 140. Os resultados obtidos apontam que a resistência à compressão da alvenaria pode influenciar, além da estabilidade estrutural do sistema, também seu isolamento térmico, critério tipicamente crítico para alvenarias de blocos cerâmicos em situação de incêndio. A amostra de maior resistência à compressão apresentou menor deslocamento horizontal, contribuindo para mitigar a geração de fissuras, aumentando a oposição da alvenaria à passagem da temperatura ao longo de sua seção transversal e assim aumentar sua resistência ao fogo. 5628 térmico assentamento 60 10 140 influenciar incêndio horizontal fissuras 562 6 1 14 56 5

Abstract The use of supplementary cementitious materials to replace Portland clinker is one of the most effective strategies adopted by cement companies to reduce CO 2 emission on large-scale. However, due to the limited availability of traditional materials, alternative options are being investigated. The main objective of this research is to evaluate the characteristics and effect of different replacement levels of cement by dregs and grits on compressive strength. The wastes were ground and particles smaller than 75 µm were used. Chemical and physical were performed to characterize the dregs and grits. For both wastes, replacement levels of 0, 5, 10, 20 and 30% of cement mass were evaluated in the mortar production. The water-cement ratio and superplasticizer admixture content were kept constant. In fresh state, the consistency index and incorporated air content were obtained. Mortars made with dregs had higher strength compared to grits due to the higher combined water content. The results showed that it is possible to replace up to 36% of cement with dregs to obtain a strength of 25 MPa; and 15% for 40 MPa. largescale. largescale large scale. scale large-scale However investigated 7 used 0 5 10 30 production watercement constant state obtained 36 MPa 15 4 1 3

Resumo Ouso de adições minerais em substituição ao clínquer Portland é uma das medidas mitigadoras de emissão de CO2, mais promissoras em larga escala, adotadas pelas cimenteiras. Dada a limitação de disponibilidade de algumas, materiais alternativos vêm sendo investigados. A presente pesquisa teve como objetivo caracterizar e avaliar o efeito de diferentes teores de dregs e grits em substituição parcial ao cimento na resistência à compressão. Os resíduos foram submetidos à moagem, utilizando-se partículas inferiores a 75 µm. Foram realizados ensaios para caracterização química e física dos dregs e grits. Para ambos os resíduos, foram analisados os teores de 0, 5, 10, 20 e 30% em substituição à massa de cimento na produção de argamassas. A relação água/finos e o teor de aditivo superplastificante foram mantidos constantes. No estado fresco, foram avaliados o índice de consistência e o teor de ar incorporado. As argamassas com dregs proporcionaram maior resistência em relação às com grits devido ao maior teor de água combinada. Os resultados mostraram que é possível substituir até 36% do cimento por esse resíduo para obtenção de resistência à compressão de 25 MPa e 15% para 40 MPa. CO2 CO escala cimenteiras algumas investigados moagem utilizandose utilizando se 7 µm 0 5 10 2 30 águafinos finos constantes fresco incorporado combinada 36 15 4 1 3

Abstract In recent years, the analysis of development conditions during the operation phase has gained attention, specially using Building Information Modeling (BIM). In this context, this research aims to delineate the frontiers of knowledge and identify future research directions with regard to the uses of BIM for the management, operation and maintenance of facilities. A mixed review method was employed, which combined scientometric analysis and a systematic literature review. To conduct the review, 4050 publications were initially retrieved from the Scopus database, which were filtered using the PRISMA protocol and resulted in 1004 publications to be analyzed. The frequency of sources and citations and the networks of co-occurrence of keywords, co-authorship of authors and countries composed the first analysis. Then, the systematic analysis of the data set was carried out, grouping the surveys into eight different categories. As a result, it was possible to identify that the field “BIM for management, operation and maintenance of facilities” is growing and that the purposes of application in this area have been expanded, in addition to there being a promising association of emerging technologies with BIM for this purpose. years attention BIM. . (BIM) context management facilities employed 405 database 100 analyzed cooccurrence co occurrence keywords coauthorship authorship Then out categories result expanded purpose (BIM 40 10 4 1

Resumo Nos últimos anos a análise das condições de empreendimentos durante a fase de operação tem ganhado atenção, inclusive com o uso do Building Information Modeling (BIM). Neste âmbito, esta pesquisa tem por objetivo delinear as fronteiras do conhecimento e identificar direções de pesquisa futuras no que diz respeito aos usos do BIM para fins de gestão, operação e manutenção de instalações. Foi empregado um método misto de revisão que associou a análise cientométrica e revisão sistemática da literatura. Para condução da revisão inicialmente foram identificadas 4050 publicações da base de dados Scopus, que foram filtrados por meio do protocolo PRISMA e resultaram em 1004 publicações a serem analisadas. A frequência de fontes e citações e as redes de coocorrência de palavras-chave, de coautoria e de países compuseram a primeira análise. Em seguida, a análise sistemática do conjunto de dados foi realizada com o agrupamento das pesquisas em oito categorias diferentes. Como resultado, foi possível identificar que o campo “BIM para gestão, operação e manutenção das instalações” está em crescimento e que as finalidades de aplicação neste âmbito têm sido ampliadas, além de haver uma associação promissora das tecnologias emergentes com o BIM para este fim. atenção BIM. . (BIM) gestão instalações literatura 405 Scopus 100 analisadas palavraschave, palavraschave palavras chave, chave palavras-chave seguida diferentes resultado ampliadas fim (BIM 40 10 4 1

Abstract This study aimed to evaluate the effect of thermal treatment on the adhesion quality of bonded joints in high-density wood, specifically Corymbia citriodora and Eucalyptus pellita, using resorcinol formaldehyde and castor oil-based polyurethane adhesives. It was used at temperatures of 160 ºC, 180 ºC and 200 °C, being compared with a control batch. The percentage of failure in the wood was analyzed to evaluate the quality of the bonding. The castor oil-based polyurethane adhesive exhibited higher values of viscosity and solid content than resorcinol formaldehyde. Eucalyptus pellita showed higher shear strength values compared to Corymbia citriodora wood. The increase in temperature reduced the shear strength for both woods. The ratio between the strength of the bonded wood and solid wood, at the same treatment temperature, often exceeded one, indicating the formation of an adhesive-fiber composite, which enhances the strength of the bonded interface, especially for C. citriodora wood. Overall, there was better bonding of Eucalyptus pellita wood with resorcinol formaldehyde, and it exhibited less thermal degradation due to lower mass loss. highdensity high density oilbased oil based adhesives 16 18 20 C °C batch woods one adhesivefiber fiber composite interface Overall loss 1 2

Resumo Esse estudo teve como objetivo avaliar o efeito do tratamento térmico na qualidade da adesão de juntas coladas de madeira de alta densidade, Corymbia citriodora e Eucalyptus pellita utilizando os adesivos resorcinol e poliuretano vegetal à base de óleo de mamona. O tratamento térmico foi realizado nas temperaturas de 160 ºC, 180 ºC e 200 °C, sendo comparadas com um lote controle. A qualidade da colagem foi avaliada através do teste de cisalhamento e análise do percentual de falha na madeira. O adesivo de poliuretano de mamona apresentou maiores valores de viscosidade e teor de sólidos, do que o resorcinol formaldeído. O Eucalyptus pellitaexibiu maiores valores de resistência ao cisalhamento que a madeira de Corymbia citriodora. O aumento da temperatura reduziu a resistência ao cisalhamento para ambas as madeiras. A razão entre a resistência da madeira colada com madeira solida, na mesma temperatura de tratamento, muitas vezes atingiu valores superiores a um, indicando a formação de um compósito adesivo-fibras, que aumenta a resistência da interface colada, especialmente para madeira de C. citriodora. De forma geral, houve uma melhor colagem da madeira de Eucalyptus pellita, com resorcinol formaldeído, e está exibiu menor degradação térmica, devido à menor perda de massa. densidade 16 18 20 C °C controle sólidos formaldeído madeiras solida adesivofibras, adesivofibras fibras, fibras adesivo-fibras geral térmica massa 1 2