We report the electrochemical potential of conductive filaments produced with recycled polylactic acid (rPLA) alongside a mixture of graphite (Gpt) and/or carbon black (CB) and castor oil to create an electrode ready-to-use. Additively-manufactured electrodes (AMEs) were compared with commercial-conductive filament composed of PLA and CB. The Gpt-CB-rPLA and CB-rPLA sensors showed lower charge-transfer resistance (Rct) and a greater heterogenous rate constant, k0, (Rct= 1040 ± 50 Ω and 1810 ± 30 Ω and k0= 6.91 (± 0.58) × 103 and 5.31 (± 0.40) × 103 cm s-1, respectively) compared to the sensor from the commercial filament (Rct = 9620 ± 280 Ω and k0 = 3.62 (± 0.38) ×10-3 cm s-1). The electrochemical response of [Fe(CN6)]3-/4- displayed a peak-to-peak separation of 180 ± 8 mV (Gpt-CB-rPLA) and 240 ± 6 mV (CB-rPLA) compared to commercial AME (740 ±10 mV), without any surface treatment. The filaments were used to create a 2,4,6-trinitrotoluene (TNT) detection platform with linear range of 5-20 and 5-100 µmol L-1 for Gpt-CB-rPLA and CB-rPLA, respectively. The collector-detector device was applied for the analysis of a blast simulation. Finally, it is worth noting that the results obtained are without electrode treatment/activation, indicating that the rough surface of the additively manufactured electrode is an additional feature of the device for collecting explosive residues, simply by rubbing the additively manufactured platform on different surfaces in crime scenarios. rPLA (rPLA Gpt (Gpt andor or CB (CB readytouse. readytouse ready use. use ready-to-use Additivelymanufactured Additively AMEs (AMEs commercialconductive GptCBrPLA CBrPLA chargetransfer charge transfer Rct constant k Rct= 104 5 181 3 691 91 6.9 ( 0.58 058 0 58 10 531 31 5.3 0.40 040 40 s1, s1 s 1, 1 s-1 respectively 962 28 362 62 3.6 0.38 038 38 ×103 ×10 ×10- s1. . s-1) FeCN63/4 FeCN634 FeCN Fe CN6 /4 4 CN [Fe(CN6)]3-/4 peaktopeak peak 18 (Gpt-CB-rPLA 24 (CB-rPLA 740 (74 ±1 mV, , mV) treatment 2,4,6trinitrotoluene 246trinitrotoluene trinitrotoluene 2,4,6 2 TNT (TNT 520 20 5-2 5100 100 5-10 L1 L L- CBrPLA, rPLA, collectordetector collector detector simulation Finally treatmentactivation activation treatment/activation residues scenarios 69 9 6. 0.5 05 53 5. 0.4 04 s- 96 36 3. 0.3 03 ×1 FeCN63 FeCN63/ / [Fe(CN6)]3-/ 74 (7 6trinitrotoluene 246 2,4, 52 5- 510 5-1 0. FeCN6 [Fe(CN6)]3- 7 2,4 51 [Fe(CN6)]3 2, [Fe(CN6)] [Fe(CN6) [Fe(CN6 [Fe(CN

ABSTRACT The soil organic carbon (SOC) content under climate change scenarios is essential, especially in areas of difficult access such as the high-altitude Tropical paramos. This study aimed to correlate the digital elevation model (DEM) derivatives, spectral indices from Sentinel-1 and Sentinel-2, and WorldClim data with in situ SOC content in the PNR-Cortadera paramo (Boyaca, Colombia). Based on 169 soil samples collected at two depths (0-15 and 15-30 cm) organic carbon was determined using the Walkley-Black method. SOC contents ranged from 25 to 200 t HA-1 at 0-15 cm and from 33 to 466 t ha-1 at 15-30 cm. Altitude, temperature, NDVI, TWI0-15 cm, MRVBF, LS factor0-15 cm and VH band polarization showed the highest correlations and the lowest variance inflation factor. The highest SOC contents are located in the central and southern area of the paramo due to the higher altitude, greater precipitation and presence of vegetation cover.

RESUMEN El contenido de carbono orgánico (COS) del suelo bajo escenarios de cambio climático es esencial, especialmente en áreas de difícil acceso como los páramos tropicales de gran altitud. Este estudio tuvo como objetivo correlacionar los derivados del modelo de elevación digital (DEM), los índices espectrales Sentinel-1 y Sentinel-2 y los datos de WorldClim con el contenido de COS in situ en el páramo PNR-Cortadera (Boyacá, Colombia). A partir de 169 muestras de suelo recolectadas a dos profundidades (0-15 y 15-30 cm), se determinó el carbono orgánico mediante el método de Walkley-Black. Los contenidos de COS a 0-15 cm de profundidad variaron entre 25 a 200 t ha-1 y 33 a 466 t ha-1 a 15-30 cm. La altitud, la temperatura, el NDVI, el TWI0-15 cm, el MRVBF, el factor LS0-15 cm y la polarización de la banda VH mostraron las mejores correlaciones y el menor factor de inflación de la varianza. Los mayores contenidos de COS se ubican en la zona central y sur del páramo debido a la mayor altitud, precipitación y presencia de cobertura vegetal.

Finos de carvão vegetal são coprodutos da carbonização da madeira, indesejados por diminuir o rendimento gravimétrico em carvão vegetal. São produzidos devido ao processo de carbonização, durante o armazenamento e transporte do carvão vegetal. A pelletização de finos aumenta a densidade energética, produzindo um combustível homogêneo e com menor teor de umidade, possibilitando a queima em equipamentos com alta eficiência energética, além de propriedades desejáveis em produtos energéticos como alto teor de carbono fixo e baixo teor de umidade. Este estudo avaliou o efeito do teor de umidade e do tempo de secagem na produção de black pellets a partir de finos de carvão vegetal ligados com amido de arroz (Oryza sativa) nas características físico-químicas e mecânicas. Os black pellets foram produzidos utilizando duas proporções de água (10 ou 20%) e tempo de secagem de 4 ou 6 horas. Os black pellets foram avaliados quanto à análise química imediata, composição elementar, teor de umidade, tamanho, densidade aparente, poder calorífico e densidade energética. A adição de água não afetou o teor de voláteis, cinzas e carbono fixo, enquanto o tratamento com adição de 20% de água e quatro horas de secagem apresentou maior teor de umidade (3,34%). A adição de água permitiu melhor condução de calor e disposição das partículas, produzindo pellets com durabilidade superior a 98%. A melhor disposição promovida pela adição de 20% de água também aumentou a densidade dos pellets, resultando em maior densidade energética. Os black pellets podem ser considerados uma boa alternativa para aquecimento residencial, com tratamento T3 (20% de umidade - 4h de secagem) apresentando elevada densidade energética e melhor desempenho em termos de propriedades desejáveis para utilização e comercialização de acordo com a norma EN 14961-6.

Charcoal fines are co-products of the wood carbonization process, unwanted because they reduce the gravimetric yield of the main product, charcoal. It can be produced due to the carbonization process, during the storage and transport of charcoal. Pelletizing charcoal fines increases the energy density of this material, producing a homogeneous fuel with lower moisture content, enabling burning in equipment with high energy efficiency, in addition to desirable properties in energy products such as high fixed carbon content and low moisture content. This study evaluated the effect of moisture content and drying time on the production of black pellets from charcoal fines bound with rice starch (Oryza sativa) on the physicochemical and mechanical characteristics. Black pellets were produced using two proportions of water (10 or 20%) and a drying time of 4 or 6 hours. Black pellets were evaluated for their proximate analysis, elemental composition, moisture content, size, apparent density, calorific value and energy density. The addition of water did not affect the content of volatile matter, ash, and fixed carbon, while the treatment with addition of 20% water and four hours of drying showed a higher moisture content (3.34%). The addition of water allowed for better heat conduction and particle arrangement, producing pellets with a durability greater than 98%. The better arrangement promoted by the addition of 20% water also increased the density of the pellets, resulting in greater energy density. Black pellets can be considered an alternative for residential heating, with T3 treatment (20% - 4h) with a high energy density and better performance in terms of desirable properties for use and commercialization according to the standard EN 14961-6.

ABSTRACT This study aimed to prepare Ganoderma-based activated carbons for chemical adsorption and catalyzing N-(phosphonomethyl)iminodiacetic acid to glyphosate. The activated carbons were prepared by applying different activation conditions. These carbon samples were applied to catalyze N-(phosphonomethyl)iminodiacetic acid to glyphosate. The results showed that the black Ganoderma char activated at 800 °C for 90 min using 40% phosphoric acid had the highest methylene blue adsorption capacity and DPPH scavenging activities, but the methylene blue adsorption capacity of the black Ganoderma sample activated at 800 °C for 90 min using 40% acid-base solution was lower than the red AC sample. These carbon samples had high thermal stability. Chemical modifications of these chars with the carbon modifiers at an optimized activation condition increased the Langmuir-specific surface areas of these carbon samples up to 2055.09 m2/g. The carbon sample of black Ganoderma activated using the 40% acid-base solution at 800 °C for 90 min and coupled with the addition of hydrogen peroxide during ultrasonication and microwave-assisted reactions had the highest glyphosate catalyzing rate. The glyphosate yield obtained from the catalyzing at atmospheric pressure was 58.78 ± 0.28%. These Ganoderma-based activated carbons can replace other carbon materials for catalysis applications and as adsorbents in food and pharmaceutical industries. Ganodermabased based Nphosphonomethyliminodiacetic N phosphonomethyl iminodiacetic conditions 80 C 9 40 activities acidbase base stability Langmuirspecific Langmuir specific 205509 2055 09 2055.0 m2g mg m2 g m m2/g microwaveassisted microwave assisted rate 5878 58 78 58.7 028 0 28 0.28% industries 8 4 20550 205 2055. 587 5 7 58. 02 2 0.28 20 0.2 0.

ABSTRACT The bisphenol A (BPA) is a raw material in plastic manufacturing and is known as an endocrine disruptor. The development and validation of a voltammetric method for BPA determination were carried out, based on disposable carbon sensors modified with carbon black. Square-wave voltammetry was selected for BPA determination in mineral water samples, marketed in plastic bottles, and this method was validated using figures of merit. A linear response was observed in the concentration range of 6.10 to 27.4 µmol L–1, with detection and quantification limits values of 0.137 µmol L–1 and 0.416 µmol L–1, respectively. The method demonstrated adequate selectivity and good precision, with relative standard deviations ranging from 0.59 to 9.89%, which were below the indicated limit for this concentration range. Accuracy estimation, in terms of average recovery, ranged from 58.16 to 118.79%, falling within the limits established by regulatory agencies. Thus, the results obtained in this study are viable compared to other studies reported in the literature for BPA determination, presenting themselves as a rapid and cost-effective alternative for monitoring this contaminant. (BPA disruptor out black Squarewave Square wave samples bottles merit 610 6 10 6.1 274 27 4 27. L1 L 1 0137 0 137 0.13 L– 0416 416 0.41 respectively precision 059 59 0.5 989 9 89 9.89% estimation recovery 5816 58 16 58.1 11879 118 79 118.79% agencies Thus costeffective cost effective contaminant 61 6. 2 013 13 0.1 041 41 0.4 05 5 0. 98 8 9.89 581 58. 1187 11 7 118.79 01 04 9.8 118.7 9. 118.

RESUMO O bisfenol A (BPA) é utilizado como matéria prima na fabricação do plástico e apresenta-se como um desregulador endócrino. Foi realizado o desenvolvimento e a validação de um método voltamétrico para determinação de BPA e o método foi baseado em sensores descartáveis de carbono modificados com carbon black. A voltametria de onda quadrada foi selecionada para a determinação do BPA em amostras de água mineral, comercializadas em garrafas plásticas, e este método foi validado por meio das figuras de mérito. Observou-se uma resposta linear no intervalo de concentração de 6,10 a 27,4 µmol L–1, com valores de limites de detecção e de quantificação iguais a 0,137 µmol L–1 e 0,416 µmol L–1, respectivamente. O método demonstrou seletividade adequada e boa precisão, com desvios padrão relativos entre 0,59 e 9,89%, estando abaixo do limite indicado para esta faixa de concentração. A estimativa da exatidão, em termos de recuperação média, foi obtida na faixa de 58,16 e 118,79%, estando dentro dos limites estabelecidos por órgãos reguladores. Deste modo, os resultados obtidos neste trabalho são viáveis frente a outros trabalhos já reportados na literatura para a determinação de BPA, apresentando-se como uma alternativa rápida e de baixo custo para o monitoramento deste contaminante. (BPA apresentase apresenta se endócrino black mineral plásticas mérito Observouse Observou 610 6 10 6,1 274 27 4 27, L1 L 1 0137 0 137 0,13 L– 0416 416 0,41 respectivamente precisão 059 59 0,5 989 9 89 9,89% exatidão média 5816 58 16 58,1 11879 118 79 118,79% reguladores modo apresentandose apresentando contaminante 61 6, 2 013 13 0,1 041 41 0,4 05 5 0, 98 8 9,89 581 58, 1187 11 7 118,79 01 04 9,8 118,7 9, 118,

In the criminal sphere, it is extremely important to identify perpetrators of crimes based on latent fingerprints (invisible to the naked eye) revealed at crime scenes and their corresponding objects. The present work aimed to evaluate four synthetic analogues of curcumin as possible IDL developers, and to compare their results with those of carbon black developer, as well as to reach the most adequate parameters in the use of the LTQ and FT-ICR mass spectrometers with the paper spray ionization (PS) source to study the chemical composition of the endogenous substances contained in the IDL. For this, a 24-1 factorial design was developed, where it was verified that the distance and voltage factors were the most influential for the increase in the response of signals, in the analysis of latent fingerprints by PS. Among the detected substances we can mention around 20 fatty acids, and squalene. Finally, four potential developers, synthetic analogues of curcumin, were compared with carbon black developer. The revelation of latent fingerprints occurred efficiently, allowing the visualization of minutiae, such as bifurcation and end of line, making it possible to classify them, according to the Vucetich Fingerprint Classification System. sphere invisible eye objects developers developer FTICR FT ICR PS (PS this 241 24 1 24- developed signals 2 acids squalene Finally efficiently minutiae line them System

Abstract We describe the toxicity of multiwalled carbon nanotubes (MWCNTs) in two aquatic species: Danio rerio and Artemia salina. Fish were exposed to 25 mg L-1, 50 mg L-1, and 100 mg L-1 MWCNTs for 7 days. After exposure, the gills from D. rerio showed lamellar fusion and epithelial lifting in the secondary lamellae, and vasodilation in the primary lamellae. In the gills, heat shock protein 70 and Bax (pro apoptotic member) were stained more intensely in the treated groups than in the control group. The nauplii of A. salina were exposed to 25 µg L-1, 50 µg L-1, and 100 µg L-1 MWCNTs for 96 h. After exposure, the nauplii from the control group presented 20 % mortality, whereas the 25 µg mL-1, 50 µg mL-1, and 100 µg L-1 groups had 46.7 %, 70 %, and 100 % mortality, respectively. The nauplii exposed to 25 µg mL1 and 50 µg mL1 MWCNTs had black aggregates in the intestine because of the uptake of nanomaterials. In addition, the 25 µg mL-1 and 50 µg mL-1 MWCNT groups had black aggregates attached onto the body surface, appendages of the second pair, and mandibles.The results revealed the toxic effects of MWCNTs on the two aquatic organisms, and both species showed great potential for toxicological evaluation of MWCNTs in aquatic environments. (MWCNTs 2 L1, L1 L 1, 1 5 10 L- days exposure D lamellae pro member A 9 h mortality mL1, mL 467 46 46. respectively nanomaterials addition mL- surface pair mandiblesThe mandibles organisms environments 4

ABSTRACT: In this study,the causative pathogen was isolated from Eucommia ulmoides,verified using Koch’s postulates, identified by morphology and molecular biology, and assessed the biological characteristics. The effects of agar media, pH, temperature, light, carbon sources, and nitrogen sources on hyphal growth of Pestalotiopsistrachicarpicola were under investigation, and the influences of time, liquid matrix, light, temperature on conidial germination were studied. The results showed that P. trachicarpicola was a new pathogen causing black spot disease of E. ulmoides, and the mycelial growth of P.trachicarpicola was the best in the potato dextrose agar (PDA) medium, pH 7.0, the temperature was 20~25 °C, light, and glucose and beef extract were the best for carbon and nitrogen, respectively. The germination rate of the conidia increased from the time, darkness, and a proper supply of sugar. The lethal temperatures of the hyphae and conidia were 52 °C and 72 °C, respectively.We can conclude that appropriate environmental conditions are more conducive to the growth of the pathogen and the germination of spores, which leads to the occurrence of disease. This study constituted the first report on the new causative pathogen in E. ulmoides black spot and the biological characteristics. Theis study provided a theoretical basis to prevent the occurrence of this disease. ABSTRACT studythe ulmoidesverified verified Kochs Koch s postulates biology characteristics media light investigation time matrix studied P E Ptrachicarpicola PDA (PDA medium 70 7 0 7.0 2025 20 25 20~2 C respectively darkness sugar 5 respectivelyWe We spores 7. 202 2 20~

RESUMO: Neste estudo, o patógeno causador foi isolado de Eucommia ulmoides, verificado pelos postulados de Koch, identificado por morfologia e biologia molecular, e avaliadas as características biológicas. Os efeitos do meio de ágar, pH, temperatura, luz, fontes de carbono e fontes de nitrogênio no crescimento de hifas de Pestalotiopsis trachicarpicola foram investigados, e as influências do tempo, matriz líquida, luz e temperatura na germinação dos conídios foram estudadas. Os resultados mostraram que P. trachicarpicola é um novo patógeno causador da doença da mancha preta de E. ulmoides, e o crescimento micelial de P. trachicarpicola foi o melhor no meio de ágar batata dextrose (PDA), pH 7.0, a temperatura é de 20~25 °C, luz e extrato de glicose e carne são os melhores para carbono e nitrogênio, respectivamente. A taxa de germinação dos conídios aumentou com o tempo, escuridão e um suprimento adequado de açúcar. As temperaturas letais das hifas e dos conídios foram 52 °C e 72 °C, respectivamente. Podemos concluir que as condições ambientais adequadas são mais propícias ao crescimento do patógeno e à germinação de esporos, o que leva à ocorrência da doença. Este estudo constitui o primeiro relato sobre o novo patógeno causador da mancha negra de E. ulmoides e as características biológicas. O objetivo deste estudo é fornecer uma base teórica para prevenir a ocorrência desta doença. RESUMO Koch molecular biológicas investigados tempo líquida estudadas P E PDA, PDA , (PDA) 70 7 0 7.0 2025 20 25 20~2 C respectivamente açúcar 5 esporos (PDA 7. 202 2 20~

Abstract Polyhydroxyalkanoates are renewable, and biocompatible plastics having physiochemical properties similar to petrochemical plastics, and meet the Sustainable Development Goals (SDG). Two bacterial strains: Pseudomonas aeruginosa and Bacillus subtilis were selected to produce the PHA. The standard carbon source was glucose while molasses and banana peels were cheaper carbon substrates used in a medium to grow the bacterial strains. Sudan black B and Nile blue A staining were used to confirm the PHA production via spread plate assay. PHA granules were observed inside the bacterial cell microscopically, using Sudan stain. The carbohydrate concentration was estimated in molasses (29.4mg/mL) and banana peel extract (9.8mg/mL) by the Phenol-sulfuric acid test. In batch fermentation, time profiles of PHA production and growth of microbial strains for every 3hrs were performed up to incubation of 48hrs at 150rpm. PHA was extracted by sodium dodecyl sulfate digestion and chloroform extraction method. PHA production in Pseudomonas aeruginosa was 1.120g/L (66.82%) and 0.380g/L (44.60%) while in Bacillus subtilis was 0.476g/L (53.84%) and 0.288g/L (39.18%) utilizing molasses and banana peels, respectively after 48hrs. FTIR characterized the PHA monomer as polyhydroxybutyrate having a C=O bond at 1697.8cm-1 and 1750.0cm-1 and a CH3 group at 1395.9cm-1 and 1458.3cm-1. A statistical significance between the PHA productions was calculated by applying an unpaired t-test, for Pseudomonas aeruginosa, a significant difference was observed between glucose with both substrates, while for Bacillus subtilis, a significant difference was noted only between glucose and peel extract. renewable SDG. SDG . (SDG) assay microscopically stain 29.4mg/mL 294mgmL mgmL 29 4mg mL mg (29.4mg/mL 9.8mg/mL 98mgmL 9 8mg (9.8mg/mL Phenolsulfuric Phenol sulfuric test fermentation hrs 150rpm rpm method 1120gL gL 1 120g L g 66.82% 6682 66 82 (66.82% 0380gL 0 380g 44.60% 4460 44 60 (44.60% 0476gL 476g 53.84% 5384 53 84 (53.84% 0288gL 288g 39.18% 3918 39 18 (39.18% CO C O 1697.8cm1 16978cm1 cm 1697.8cm 1697 8cm 1697.8cm- 1750.0cm1 17500cm1 1750.0cm 1750 0cm 1750.0cm- CH 1395.9cm1 13959cm1 1395.9cm 1395 9cm 1395.9cm- 1458.3cm1. 14583cm1 1458.3cm 1. 1458 3cm 1458.3cm-1 ttest, ttest t test, t-test (SDG 2 66.82 668 6 8 (66.82 44.60 446 4 (44.60 53.84 538 5 (53.84 39.18 391 3 (39.18 8cm1 16978cm 169 0cm1 17500cm 175 9cm1 13959cm 139 3cm1 1458.3cm1 14583cm 145 1458.3cm- 66.8 (66.8 44.6 (44.6 53.8 (53.8 39.1 (39.1 16 17 13 14 66. (66. 44. (44. 53. (53. 39. (39. (66 (44 (53 (39 (6 (4 (5 (3 (

ABSTRACT Charcoal fines are co-products of the wood carbonization process, unwanted because they reduce the gravimetric yield of the main product, charcoal. It can be produced due to the carbonization process, during the storage and transport of charcoal. Pelletizing charcoal fines increases the energy density of this material, producing a homogeneous fuel with lower moisture content, enabling burning in equipment with high energy efficiency, in addition to desirable properties in energy products such as high fixed carbon content and low moisture content. This study evaluated the effect of moisture content and drying time on the production of black pellets from charcoal fines bound with rice starch (Oryza sativa) on the physicochemical and mechanical characteristics. Black pellets were produced using two proportions of water (10 or 20%) and a drying time of 4 or 6 hours. Black pellets were evaluated for their proximate analysis, elemental composition, moisture content, size, apparent density, calorific value and energy density. The addition of water did not affect the content of volatile matter, ash, and fixed carbon, while the treatment with addition of 20% water and four hours of drying showed a higher moisture content (3.34%). The addition of water allowed for better heat conduction and particle arrangement, producing pellets with a durability greater than 98%. The better arrangement promoted by the addition of 20% water also increased the density of the pellets, resulting in greater energy density. Black pellets can be considered an alternative for residential heating, with T3 treatment (20% - 4h) with a high energy density and better performance in terms of desirable properties for use and commercialization according to the standard EN 14961-6. coproducts co process product material efficiency Oryza sativa characteristics 10 (1 20 analysis composition size matter ash 3.34%. 334 3.34% . 3 34 (3.34%) 98 98% heating T (20 4h h 149616. 149616 14961 6. 14961-6 1 ( 2 33 3.34 (3.34% 9 (2 1496 14961- 3.3 (3.34 149 3. (3.3 14 (3. (3

RESUMO Finos de carvão vegetal são coprodutos da carbonização da madeira, indesejados por diminuir o rendimento gravimétrico em carvão vegetal. São produzidos devido ao processo de carbonização, durante o armazenamento e transporte do carvão vegetal. A pelletização de finos aumenta a densidade energética, produzindo um combustível homogêneo e com menor teor de umidade, possibilitando a queima em equipamentos com alta eficiência energética, além de propriedades desejáveis em produtos energéticos como alto teor de carbono fixo e baixo teor de umidade. Este estudo avaliou o efeito do teor de umidade e do tempo de secagem na produção de black pellets a partir de finos de carvão vegetal ligados com amido de arroz (Oryza sativa) nas características físico-químicas e mecânicas. Os black pellets foram produzidos utilizando duas proporções de água (10 ou 20%) e tempo de secagem de 4 ou 6 horas. Os black pellets foram avaliados quanto à análise química imediata, composição elementar, teor de umidade, tamanho, densidade aparente, poder calorífico e densidade energética. A adição de água não afetou o teor de voláteis, cinzas e carbono fixo, enquanto o tratamento com adição de 20% de água e quatro horas de secagem apresentou maior teor de umidade (3,34%). A adição de água permitiu melhor condução de calor e disposição das partículas, produzindo pellets com durabilidade superior a 98%. A melhor disposição promovida pela adição de 20% de água também aumentou a densidade dos pellets, resultando em maior densidade energética. Os black pellets podem ser considerados uma boa alternativa para aquecimento residencial, com tratamento T3 (20% de umidade - 4h de secagem) apresentando elevada densidade energética e melhor desempenho em termos de propriedades desejáveis para utilização e comercialização de acordo com a norma EN 14961-6. madeira Oryza sativa físicoquímicas físico químicas mecânicas 10 (1 20 imediata elementar tamanho aparente voláteis 3,34%. 334 3,34% . 3 34 (3,34%) partículas 98 98% residencial T (20 h 149616. 149616 14961 6. 14961-6 1 ( 2 33 3,34 (3,34% 9 (2 1496 14961- 3,3 (3,34 149 3, (3,3 14 (3, (3

ABSTRACT Antarctica is a remote and relatively pristine region, but the regional transport of aerosols may be a source of pollution, especially in the Antarctic Peninsula. Few studies have characterized atmospheric aerosols and evaluated the contribution of their emission sources. The Peruvian Antarctic research station Machu Pichu (ECAMP, by its Spanish acronym) is located on King George Island in the Antarctic Peninsula. During February 2020, atmospheric particulate mass (PM10 and PM2.5) was sampled and analyzed to characterize its elemental composition and was supplemented by measurements of equivalent black carbon and aerosol size distributions. Chemical elements were analyzed by inductively coupled plasma mass spectrometry (ICP-MS), multivariate techniques, and enrichment factors. The most abundant elements in PM10 and PM2.5 were Na, Fe, Mg, and Si, with the most important local sources being marine (Na, Mg, Mn, Ca) and crustal (Fe, Al, P). Sources of weathering (Ba and Si) from glacial thawing and sources of combustion linked to the use of oil (V) and emission of black carbon were recorded. Air mass back-trajectory analysis using the HYSPLIT model helped identify external sources of particulate matter in the air masses reaching the ECAMP site. Overall, this study supports the growing evidence of the anthropogenic impact of distant and local sources on the white continent.

RESUMEN La Antártida es una región remota, pero con importante influencia de las regiones circundantes. El transporte de aerosoles desde distancias lejanas es una importante fuente de contaminación que puede impactar esta región, especialmente la Península Antártica. Es necesario caracterizar los aerosoles atmosféricos y analizar la contribución de sus fuentes de emisión. Para ello se analizó durante febrero de 2020 la composición química elemental de las partículas atmosféricas PM10 y PM2.5, y se realizaron mediciones de tanto de éstas como de carbono negro con análisis de retrotrayectoria de masas de aire utilizando el modelo HYSPLIT. El objetivo fue caracterizar los elementos traza, analizar las fuentes de material particulado y comprender los orígenes de las masas de aire que contribuyen con partículas en la Estación Científica Antártica Peruana Machu Pichu (ECAMP), ubicada en la Isla Rey Jorge de la península Antártica. Se usaron colectores Partisol con filtros de teflón, perfilador contador de partículas y etalómetro. Los elementos químicos se analizaron por espectrometría de masas de plasma acoplada inductivamente (ICP-MS) y se aplicaron técnicas multivariadas y factor de enriquecimiento. Los elementos más abundantes en PM10 y PM2.5 fueron Na, Fe, Mg y Si, siendo las fuentes locales más importantes las de origen marino (Na, Mg, Mn, Ca) y de la corteza (Fe, Al, P). Se registraron también fuentes de meteorización (Ba y Si) propias del descongelamiento de los glaciares y fuentes de quema ligadas al uso de petróleo (V) y carbono negro. El estudio de las masas de aire sugiere una contribución potencialmente importante de fuentes externas. En general, se demuestra el impacto de fuentes antrópicas distantes y locales en el continente blanco.

ABSTRACT Background: Acacia mearnsii and Eucalyptus dunnii are species planted mainly for tannin and cellulose production. However, its woods have characteristics favorable to their use for energy generation, being commercialized in the form of firewood, chips or charcoal too. Biochar is a stable form of carbon that can be obtained by converting small particles of wood in the pyrolysis process and that can be used as solid fuel, among other applications as a soil conditioner. In this study, the properties of biochar produced in a horizontal reactor using wood of these species and under milder temperatures were evaluated. Results: Temperature of 350 oC and the reaction time of 30 minutes promoted an increase in higher calorific value of 33% for A. mearnsii and 51% for E. dunnii, with gravimetric yield of 39% and 32%, respectively. it was found that the 250 and 300 oC was not efficient to carbonize the wood of both species. An increase in specific surface area is observed with increasing carbonization temperature. Bigger increases were produced at temperatures of 350 oC for E. dunnii and 420 oC for A. mearnsii, with increase in porosity. At these temperatures, there was an increase in surface area and a decrease in pore size. Conclusion: In temperatures of 350 oC, the woods of both species provided a good quality biochar with porosity, surface area, pore size and pyrolysis yield suitable for energy use. For soil conditioning use, considering these aspects, suggested to test the appropriate temperatures for each species, between 350 and 420 oC. Background production However generation firewood too fuel conditioner study evaluated Results 35 3 33 A 51 E 39 32 32% respectively 25 temperature 42 porosity Conclusion aspects 5 2 4

ABSTRACT We measured the optical properties of aerosols with two photoacoustic spectrometers operating at 532 and 870 nm wavelengths and sampled PM2.5 to analyze the organic carbon (OC) and elemental carbon (EC) content. The measuring site was in the southwest corner of Mexico City. We sorted the data by OC/EC ratios and calculated four mass absorption efficiencies (MAEs) for each wavelength with linear regressions. The MAEs ranged from 2.27 to 19.75 and 2.03 to 15.26 m2 g-1 at 532 and 870 nm, respectively, with determination coefficients above 0.88, showing that the amount of OC modifies the absorption properties of particles, sometimes underestimating or overestimating the black carbon concentration. It is possible to choose the MAE based on the daily median O3 concentration when there is no information about the EC and OC composition.

RESUMEN Medimos las propiedades ópticas de aerosoles con dos espectrómetros fotoacústicos que operaban a longitudes de onda de 532 y 870 nm y tomamos muestras de PM2.5 para analizar el contenido de carbono orgánico (OC, por su sigla en inglés) y carbono elemental (EC). El sitio de medición estaba en la esquina suroeste de la Ciudad de México. Ordenamos los datos por cocientes OC/EC y calculamos cuatro eficiencias de absorción de masa (MAE) para cada longitud de onda. Los diferentes MAE variaron de 2.27 a 19.75 m2 g-1 a 532 nm y 2.03-15.26 m2 g-1 a 870 nm, con coeficientes de determinación superiores a 0.88, lo que demuestra que la cantidad de OC modifica las propiedades de absorción de las partículas, en ocasiones subestimando o sobreestimando la concentración de carbono negro. Se puede elegir un MAE con base en la concentración mediana diaria de O3 si no hay información sobre la composición de EC y OC de los aerosoles atmosféricos.

Abstract Clitoria ternatea L. is valued for its ornamental characteristics, medicinal properties, and culinary uses. However, efficient production of this species is constrained by seed coat dormancy, which impedes germination and seedling production. This study aimed to explore the physicochemical and morphological aspects of C. ternatea seeds, focusing on overcoming dormancy by applying multi-walled carbon nanotubes (MWCNTs) functionalized with carboxylic acid. The seeds were characterized by their physical, chemical, and mineral composition. Characterization included color dominance, geometry, thousand seed weight, and moisture content analyses. The seeds were treated with different concentrations (0, 100, 200, 400, 800 mg L-1) of multi-walled carbon nanotubes (MWCNT) during 24 hours of soaking. Then the germination rates were evaluated and morphological analysis was performed using scanning electron microscopy. Regarding the morphometry of the seeds, they were characterized by an oblong shape, a predominance of black tegument coloration, high levels of proteins, carbohydrates, lipids, fibers, and the presence of minerals such as potassium, magnesium, iron, and calcium. Seeds soaked in MWCNTs at a concentration of 200 mg L-1 exhibited an increase in germination percentage and the formation of normal seedlings compared to the control group (seeds soaked in water). The results suggest that MWCNTs can help to overcome seed dormancy and improve the quality of the resulting seedlings. Image analysis and scanning electron microscopy were crucial in understanding the physicochemical characteristics of the seeds and their changes upon exposure to MWCNTs. L properties uses However C multiwalled multi walled (MWCNTs acid physical chemical composition dominance geometry weight analyses 0, 0 (0 100 400 80 L1 1 MWCNT (MWCNT 2 soaking shape coloration proteins carbohydrates lipids fibers potassium magnesium iron calcium 20 L- water. water . water) ( 10 40 8 4

Resumo Clitoria ternatea L. é valorizada por suas características ornamentais, propriedades medicinais e usos culinários. No entanto, a produção eficiente desta espécie é limitada pela dormência do tegumento, que impede a germinação e a produção de mudas. Este estudo teve como objetivo explorar os aspectos físico-químicos e morfológicos de sementes de C. ternatea, com foco na superação da dormência através da aplicação de nanotubos de carbono de paredes múltiplas (MWCNTs) funcionalizados com ácido carboxílico. As sementes foram caracterizadas quanto à sua composição física, química e mineral. A caracterização incluiu análises de dominância de cor, geometria, peso de mil sementes e teor de umidade. As sementes foram tratadas com diferentes concentrações (0, 100, 200, 400, 800 mg L-1) de nanotubos de carbono de paredes múltiplas (MWCNT) 24 horas de embebição. Em seguida foram avaliadas as taxas de germinação e realizada análise morfológica por microscopia eletrônica de varredura. Quanto à morfometria das sementes, elas foram caracterizadas pelo formato oblongo, predomínio da coloração preta do tegumento, altos teores de proteínas, carboidratos, lipídios, fibras e presença de minerais como potássio, magnésio, ferro e cálcio. Sementes embebidas em MWCNTs na concentração de 200 mg L-1 apresentaram aumento na porcentagem de germinação e formação de plântulas normais em comparação ao grupo controle (sementes embebidas em água). Os resultados sugerem que os MWCNTs podem ajudar a superar a dormência das sementes e melhorar a qualidade das mudas resultantes. A análise de imagens e a microscopia eletrônica de varredura foram cruciais para a compreensão das características físico-químicas das sementes e suas alterações após a exposição aos MWCNTs. L ornamentais culinários entanto tegumento físicoquímicos físico químicos C (MWCNTs carboxílico física mineral cor geometria umidade 0, 0 (0 100 400 80 L1 1 MWCNT (MWCNT 2 embebição oblongo proteínas carboidratos lipídios potássio magnésio cálcio 20 L- água. água . água) resultantes físicoquímicas químicas ( 10 40 8 4

The generation of clean, zero-carbon, and renewable energy is a challenge for the development of a sustainable and egalitarian society. Hydrogen gas can be produced by water electrolysis and has been claimed as the most promising option to replace fossil fuels. The oxygen evolution reaction (OER) is the most energetically demanding step of the water splitting and requires the use of electrocatalysts to overcome the kinetic barrier. Iron oxide nanomaterials have been emerging as a low-cost and Earth-abundant OER electrocatalysts. The synthesis of iron oxide assisted by plant extract is an eco-friendly approach to obtain nanomaterials with unique properties. Herein, we investigated iron oxide synthesized with the assistance of Camellia sinensis extract, under different experimental conditions towards oxygen evolution reaction electrocatalysis. Pure phases of iron oxide were obtained, ferrihydrite and maghemite showed overpotentials of 460 and 480 mV at a current density of 10 mA cm–2, respectively. After calcination, hematite was formed and the overpotential was raised to 610 and 810 m V, respectively. The lower overpotential of the amorphous materials could be related to the lower electron transfer resistance and faster reaction rate. On the other hand, the calcinated materials presented higher specific activity, stability and higher Faradaic efficiency. clean zerocarbon, zerocarbon zero carbon, carbon zero-carbon society fuels (OER barrier lowcost low cost Earthabundant Earth abundant ecofriendly eco friendly properties Herein electrocatalysis obtained 46 48 1 cm2 cm 2 cm–2 respectively calcination 61 81 V rate hand activity efficiency 4 cm– 6 8