Journal of the Brazilian Chemical Society最新文献_第9页

Seasonal and Circadian Evaluation of the Pectis brevipedunculata Essential Oil and Its Acaricidal Activity against Rhipicephalus microplus (Acari: Ixodidae) 短柄果胶精油对微小蜱螨(蜱螨目:伊蚊科)杀螨活性的季节和昼夜评价

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230017

M. Camara, Aldilene Lima, L. Jumbo, C. Tavares, C. Mendonça, O. Monteiro, Sabrina H. C. Araujo, E. D. de Oliveira, J. Neto, J. Maia, L. Costa-Júnior, C. D. da Rocha

{"title":"Seasonal and Circadian Evaluation of the Pectis brevipedunculata Essential Oil and Its Acaricidal Activity against Rhipicephalus microplus (Acari: Ixodidae)","authors":"M. Camara, Aldilene Lima, L. Jumbo, C. Tavares, C. Mendonça, O. Monteiro, Sabrina H. C. Araujo, E. D. de Oliveira, J. Neto, J. Maia, L. Costa-Júnior, C. D. da Rocha","doi":"10.21577/0103-5053.20230017","DOIUrl":"https://doi.org/10.21577/0103-5053.20230017","url":null,"abstract":"Pectis brevipedunculata are native species and widely available in dry and semi-arid ecosystems showing high biotechnological potential. The objective of this study was to evaluate the circadian and seasonal chemical variation of the essential oil (EO) of P. brevipedunculata, as well as its acaricide effect on Rhipicephalus microplus larvae. Aerial parts were collected and submitted to the hydrodistillation process, and the chemical composition was determined by gas chromatography mass spectrometry (GC-MS). For the assays with R. microplus, the larval immersion test was performed. The main constituents were citral (75% of the EO), followed by α-pinene and limonene. In the seasonality analysis, the highest yields were in the months of April (2.08%) and August (2.05%), while in the study of circadian rhythm, the percentage was 2.0% at 6 p.m. in the rainy season, and 1.2%, dry season at 6 p.m. Concerning acaricidal activity (50% lethal concentration (LC50)), the April (1.17 mg mL-1), March (1.28 mg mL-1), June (1.37 mg mL-1), and October (1.27 mg mL-1) oils obtained were the most active and assays performed with circadian rhythm revealed in the rain season (April) at 6 p.m. and dry season (September) at 12 a.m. LC50 values of 1.75 and 1.75 mg mL-1, respectively. Additionally, this EO is selective to non-target organisms, i.e., ladybeetles and lacewing.","PeriodicalId":17257,"journal":{"name":"Journal of the Brazilian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68329260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Dispersive Liquid Phase Microextraction (DLPME) as a Strategy for CdII Separation and Determination in High-Salinity Produced Waters by Graphite Furnace Atomic Absorption Spectrometry 分散液相微萃取-石墨炉原子吸收光谱法分离测定高盐度采出水中CdII

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230007

Nicolle F. Robaina, G. Cruz, R. Cassella

{"title":"Dispersive Liquid Phase Microextraction (DLPME) as a Strategy for CdII Separation and Determination in High-Salinity Produced Waters by Graphite Furnace Atomic Absorption Spectrometry","authors":"Nicolle F. Robaina, G. Cruz, R. Cassella","doi":"10.21577/0103-5053.20230007","DOIUrl":"https://doi.org/10.21577/0103-5053.20230007","url":null,"abstract":"In this study, we propose a microextraction method for the determination of CdII in produced waters. The process is based on the conversion of CdII ions into a hydrophobic diethyldithiocarbamate (DDTC) complex with its subsequent dispersive liquid phase microextraction (DLPME) from the aqueous medium with chloroform. The organic phase was then diluted with ethanol and Cd absorbance was measured by graphite furnace atomic absorption spectrometry (GF AAS). The experimental conditions related to the DLPME process were investigated, and the best microextraction conditions were achieved at pH = 6.0 (acetate buffer), 7.5 × 10-6 mol L-1 of DDTC, and when using 200 µL of chloroform as the extracting solvent. No dispersing solvent was needed, which allowed the recovery of approximately 140 µL of chloroform extract. Pyrolysis and atomization temperatures of the GF AAS program were determined through the construction of the respective curves. The estimated limits of detection (LOD) and quantification (LOQ) were 5 and 17 ng L-1, respectively, whereas the enrichment factor for the method was 17. Six samples of seawater and five samples of produced waters with salinities between 30 and 270‰ were analyzed as well as two certified reference materials of saline waters.","PeriodicalId":17257,"journal":{"name":"Journal of the Brazilian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68329149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of Flavonoids Profiles in Polar Extracts from Croton grewioides Baill. Using Ultra-High Resolution Mass Spectrometry 克罗维极地提取物中黄酮类化合物的特征。使用超高分辨率质谱

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230004

Pedro do Nascimento, Vilma Prado, R. D. de Jesus, Wenes Ramos da Silva, Alberto Wisniewski Jr., José Carlos Freitas de Sá Filho, A. Blank, Daniel G. de Souza, E. Wartha, P. Nogueira, V. Moraes

{"title":"Characterization of Flavonoids Profiles in Polar Extracts from Croton grewioides Baill. Using Ultra-High Resolution Mass Spectrometry","authors":"Pedro do Nascimento, Vilma Prado, R. D. de Jesus, Wenes Ramos da Silva, Alberto Wisniewski Jr., José Carlos Freitas de Sá Filho, A. Blank, Daniel G. de Souza, E. Wartha, P. Nogueira, V. Moraes","doi":"10.21577/0103-5053.20230004","DOIUrl":"https://doi.org/10.21577/0103-5053.20230004","url":null,"abstract":"Research to identify plant bioactive compounds led to the evolution of extraction methods. This study optimized ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE) to extract the flavonoids of Croton grewioides Baill. species contributing to characterize the polar extract profile and understand the antioxidant potential of these plant constituents. The use of experimental design and statistical treatments enabled the determination of the ideal conditions for each technique. The extracts of five accessions of C. grewioides were obtained under the optimized extraction conditions and were analyzed using ultra high-resolution mass spectrometry (FT-Orbitrap MS) operating at negative ionization mode for flavonoids detection. The accurate experimental mass obtained to the main compounds was used to attribute the molecular formula. Chemical structures of the main compounds detected were proposed using structure data bases. Chemometric analysis were performed with two FT-Orbitrap MS spectra samples using the identified metabolites and, the antioxidant activity data, showing that for this species the MAE was most effective in extracting the antioxidant compounds. It was possible to propose the structures for forty compounds in the C. grewioides extracts, demonstrating the excellent performance of the FT-Orbitrap MS in providing information on the chemical profile of polar compounds in plant extracts.","PeriodicalId":17257,"journal":{"name":"Journal of the Brazilian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68328820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective Extraction of Hafnium over Zirconium with Dialkylphosphinic Acids from H2SO4 Media 硫酸介质中二烷基膦酸选择性萃取锆和铪

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230014

Junlian Wang, Hui Liu, Wen Xu, Ziyong Chang, Pei-pei Wang, Huajun Wang

{"title":"Selective Extraction of Hafnium over Zirconium with Dialkylphosphinic Acids from H2SO4 Media","authors":"Junlian Wang, Hui Liu, Wen Xu, Ziyong Chang, Pei-pei Wang, Huajun Wang","doi":"10.21577/0103-5053.20230014","DOIUrl":"https://doi.org/10.21577/0103-5053.20230014","url":null,"abstract":"Designing highly efficient dialkylphosphinic acid extractant for zirconium/hafnium separation relies on systematic structure-property studies. In this paper, dialkylphosphinic acids with different substituents at β-C, γ-C and δ-C for zirconium and hafnium extraction and separation from H2SO4 media were investigated. The results show that substituents at β-C, γ-C and δ-C reduce the extraction ability of dialkylphosphinic acids for both zirconium and hafnium. The substituent effect at β-C is greater than that at γ-C and δ-C. The larger steric hindrance of the substituents (ethyl > methyl > H), the weaker extraction ability of the dialkylphosphinic acids. The zirconium and hafnium separation behavior is related to the extraction ability of dialkylphosphinic acids. Dialkylphosphinic acids with stronger extraction ability show better zirconium/hafnium separation performance at higher acidity of 2.0 mol L-1 H2SO4, while those with weaker extraction ability show better zirconium and hafnium separation performance at lower acidity of 0.25 mol L-1 H2SO4. The highest hafnium/zirconium separation factor (βHf/Zr) in the current study occurs with (2-ethylhexyl) (2,4,4-trimethylpentyl)phosphinic acid (USTB-1), which reaches 19.2.","PeriodicalId":17257,"journal":{"name":"Journal of the Brazilian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68329608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Nectarine Coated with Biopolymeric Nanocapsules Containing Eugenol to Control Brown Rot 丁香酚生物聚合物纳米包膜油桃防治褐腐病的研究

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230018

Joslaine Jacumazo, G. Parchen, M. Garcia, N. Santos, L. D. De Mio, F. Marques, R. D. de Freitas

{"title":"Nectarine Coated with Biopolymeric Nanocapsules Containing Eugenol to Control Brown Rot","authors":"Joslaine Jacumazo, G. Parchen, M. Garcia, N. Santos, L. D. De Mio, F. Marques, R. D. de Freitas","doi":"10.21577/0103-5053.20230018","DOIUrl":"https://doi.org/10.21577/0103-5053.20230018","url":null,"abstract":"Infections in fruits caused by fungi reduce the quantity and quality of food for human consumption, in addition to causing economic losses. In this sense, this study aimed to address the effects of eugenol nanocapsules (NCs) based on chitosan and carboxymethylcellulose in protecting nectarines against Monilinia fructicola, a brown rot agent, a worldwide important disease. NCs were prepared by layer-by-layer (LbL) self-assembly starting from an anionic template and deposition with up to two polymeric layers. The hydrodynamic diameters ranged from 158 nm (nanoemulsion), 360 nm (one polymeric layer) to 398 nm (two polymeric layers). NCs presented, during the in vitro release, the release of eugenol following a first order process. In addition to being in the region of stability (zeta potential ca. |30| mV), the capsules showed good adhesion to the nectarine surface. In relation to brown rot, the eugenol NCs with chitosan proved to be the best formulation compared to nanoemulsion and NCs with two polymeric layers for its control, increasing the probability that the fruits remain without symptoms, even after 7 days. Therefore, this study demonstrated that chitosan NCs containing eugenol could be an alternative to preserve fruit for longer periods in post-harvest.","PeriodicalId":17257,"journal":{"name":"Journal of the Brazilian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68330030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

pH-Responsive, Hemocompatible, and Non-Toxic Polysaccharide-Based Hydrogel from Seeds of Salvia spinosa L. for Sustained Release of Febuxostat pH响应性、血液相容性、无毒的刺五加种子多糖水凝胶对非布索坦的缓释作用

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230001

Arshad Ali, M. Hussain, M. Haseeb, M. Ashraf, Muhammad Farid-ul-Haq, T. Tabassum, Gulzar Muhammad, A. Abbas

{"title":"pH-Responsive, Hemocompatible, and Non-Toxic Polysaccharide-Based Hydrogel from Seeds of Salvia spinosa L. for Sustained Release of Febuxostat","authors":"Arshad Ali, M. Hussain, M. Haseeb, M. Ashraf, Muhammad Farid-ul-Haq, T. Tabassum, Gulzar Muhammad, A. Abbas","doi":"10.21577/0103-5053.20230001","DOIUrl":"https://doi.org/10.21577/0103-5053.20230001","url":null,"abstract":"Herein, a polysaccharide-based hydrogel from seeds of Salvia spinosa (SSH) was evaluated as a pH-responsive, superporous, hemocompatible, non-toxic, and sustained release material. The SSH-based tablets showed pH-dependent swelling (pH 7.4 > 6.8 > 4.5 > 1.2) as well as swelling and de-swelling behavior at pH 7.4 and 1.2, respectively. Sustained release of febuxostat was achieved by mimicking the gastrointestinal tract conditions for 14 h and following the zero-order kinetics and super case-II transport mechanism. Scanning electron microscopy revealed the porous nature of SSH even after compression. SSH was found to be hemocompatible with antioxidant properties. Acute toxicity studies ensured the safety of SSH at a maximum dose level of 2.0 g kg-1 body weight of the animals. SSH was also found as non-irritant to the eye. The histopathology of vital organs did not show any lesions or inflammation. Conclusively, SSH can be considered a safe ingredient for oral, dermal, and ophthalmic formulations.","PeriodicalId":17257,"journal":{"name":"Journal of the Brazilian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68329128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Different Al2O3 Supports on the Synthesis of Tetralin by Selective Catalytic Hydrogenation of Naphthalene 不同Al2O3载体对萘选择性催化加氢合成四氢萘的影响

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230011

X. Su, Lei Zhao, Xiangrui Wang, Zhao Wang, Zhichao Wang, Tao Shen, Ping Zhang

引用次数: 0

Silver Tungstate Obtained via Successive Seed Crystal Growth: Structural, Morphological, Optical, and Photocatalytic Properties 通过连续种子晶体生长获得的钨酸银:结构、形态、光学和光催化性质

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230013

G. Santos, F. Silva, J. Cruz-Filho, R. Luza, G. Luz Jr

{"title":"Silver Tungstate Obtained via Successive Seed Crystal Growth: Structural, Morphological, Optical, and Photocatalytic Properties","authors":"G. Santos, F. Silva, J. Cruz-Filho, R. Luza, G. Luz Jr","doi":"10.21577/0103-5053.20230013","DOIUrl":"https://doi.org/10.21577/0103-5053.20230013","url":null,"abstract":"Synthesis routes and parameters such as synthesis time, precursor molar ratio, pH, and temperature are critical for generating oxides of various sizes and morphological aspects. However, there is no information on how to prepare silver tungstate (Ag2WO4) crystals of different shapes and sizes under laboratory conditions and without using sulfating agents. In this study, we attempted to fill this gap by preparing α-Ag2WO4 crystals of various sizes and morphologies using the coprecipitation method in a 3 h interval at room temperature and without using sulfating agents. The powder X-ray diffraction analysis confirmed that all crystals had an orthorhombic structure, whereas Fourier-transform infrared spectroscopy revealed the degree of structural disorder in the bonds between the atoms in the materials. Scanning electron microscopy revealed that the α-Ag2WO4 crystals had different sizes (5.37-26.83 μm) and morphologies (tetragonal prism, rod, and cypress leave-like rod), whereas ultraviolet-visible diffuse reflectance spectroscopy analysis indicated the optical band gap energy (2.92-3.05 eV), calculated using the method proposed by Kubelka and Munk. Catalytic tests revealed that the synthesized samples with the smallest crystals (AW1) and a tetragonal prism morphology degraded dye more efficiently (apparent rate constant (k) = 5.86 × 10−3 min−1) than other samples.","PeriodicalId":17257,"journal":{"name":"Journal of the Brazilian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68329563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biogenic Silver Nanoparticles Capped with Proteins: Timed Knowledge and Perspectives 生物纳米银与蛋白质封顶:时间知识和观点

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI: 10.21577/0103-5053.20230062

N. Durán, W. Fávaro, S. Alborés, Thyerre da Costa, L. Tasić

{"title":"Biogenic Silver Nanoparticles Capped with Proteins: Timed Knowledge and Perspectives","authors":"N. Durán, W. Fávaro, S. Alborés, Thyerre da Costa, L. Tasić","doi":"10.21577/0103-5053.20230062","DOIUrl":"https://doi.org/10.21577/0103-5053.20230062","url":null,"abstract":"Biogenic silver nanoparticles are synthesized through silver(I) reduction, which is promoted by biomolecules available in the biological world and mostly obtained from plant extracts, fungal bioproduction, and some bacteria. The exact mechanisms accounting for such oxidoreduction processes are not fully known. However, some studies have already mentioned oxidoreductases, cofactors (nicotinamide adenine dinucelotide hydrogen (NADH), dihydroflavine-adenine dinucleotid (FADH2)), and phenolic compounds, as the main reductive species engaged in the formation of silver(0) and silver nanoparticles (silver NPs) synthesis. Biosynthesis is a one-pot process that leads to stable silver NP colloids that, regarding their size, shape, and uniformity, can be successfully controlled; and show great stability when one takes into account their surface capping by some biomolecules that as well take part in their synthesis. Although great efforts have been made to feature capping biomolecules and their interactions with silver NP surfaces, knowledge of the quantity (exact number per cm2 ) and type of biomolecules that cap or surround silver NPs remains limited. The literature provides detailed information on protein capping, but it still shows gaps regarding many aspects of fine biophysical protein featuring. The reason why certain proteins prefer to interact with silver NP surface and form chemical bonds, whereas others rather have intermolecular interaction with the first layer of proteins remains unknown. Assessing capping proteins’ involvement in the bioactivity of biogenic silver NPs is another relevant research field. Certain proteins enhance bioactivity of silver NPs and lower toxicity; however, the way antimicrobial processes benefit from protein capping is yet to be discovered. Finally, biogenic silver NPs can be found both in the environment and in water; moreover, their additional activity and behavior must be known or, at least, hypothesized.","PeriodicalId":17257,"journal":{"name":"Journal of the Brazilian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68338911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Multi-Analytical Characterization of Rupestrian Precolonial Paintings of Inhuma, Piauí, Brazil 秘鲁人的前殖民时期绘画的多分析表征，Piauí，巴西

IF 1.4 4区化学

Journal of the Brazilian Chemical Society Pub Date : 2023-05-26 DOI: 10.21577/0103-5053.20220151

Jacira de Moura, M. Lage, Benedito B. Farias Filho, D. L. de Faria, Wilkins de Barros, Hugo Loureiro

引用次数: 0