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1.
Assessing the Quality of Wheat Flour Blended with Cassava Starch Using a Handheld NIR Spectrophotometer and Chemometrics
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Candeias, Dâmaris N. C.
; Barros, Sara Regina R. C. de
; Lyra, Wellington S.
; Fernandes, David Douglas S.
; Diniz, Paulo Henrique G. D.
.
Journal of the Brazilian Chemical Society
- Métricas do periódico
This work developed an effective and eco-friendly analytical method to support quality control for Brazilian Bill proposal No. 5332/2009. The bill advocates the creation of the “Brazilian bread” by mandating the incorporation of cassava byproducts into wheat flour, with the aim of reducing Brazil’s external dependency on wheat imports and promoting domestic cassava family farming. For this, a handheld near-infrared (NIR) spectrophotometer was utilized for on-site determination of cassava starch in commercial wheat flour. The quantitative analysis, which utilized NIR spectra pre-processed with offset correction (OFF) combined with linear baseline correction (LBC), alongside the successive projections algorithm for interval selection in partial least squares (iSPA-PLS), exhibited superior predictive capability, achieving a relative error of prediction below 8%. Furthermore, the classification process, which involved NIR spectra pre-processed with LBC and iSPA-PLS for discriminant analysis (iSPA-PLS-DA), yielded an impressive 94% overall accuracy, with only 3 misclassifications in the test set. ecofriendly eco friendly No 53322009 5332 2009 5332/2009 bread flour Brazils Brazil s farming this nearinfrared near infrared (NIR onsite site preprocessed pre processed OFF (OFF LBC, , (LBC) iSPAPLS, iSPAPLS iSPA PLS (iSPA-PLS) capability 8 8% Furthermore process iSPAPLSDA, iSPAPLSDA DA (iSPA-PLS-DA) 94 accuracy set 5332200 533 200 5332/200 (LBC (iSPA-PLS (iSPA-PLS-DA 9 533220 53 20 5332/20 53322 5 2 5332/2 5332/
2.
Brazoide Ε, a New Alkaloid and Other Compounds from Justicia wasshauseniana (Acanthaceae) Ε Acanthaceae (Acanthaceae
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Fernandes, Renata D.
; Braz Filho, Raimundo
; Carvalho, Mário G. de
; Braz, Denise M.
; Suzart, Luciano R.
; Tejero, Tatiane N.
; Bauerfeldt, Glauco F.
; Gonçalves, Mariele R. S.
.
Journal of the Brazilian Chemical Society
- Métricas do periódico
A new alkaloid, named brazoide Ε (6), three known steroids (campesterol, β-sitosterol, stigmasterol), two glucosides (3-O-β-D-glucopyranosylsitosterol and 3-O-β-D-glucopyranosyl stigmasterol) and sucrose were isolated from the leaves and stems of Justicia wasshauseniana. Their structures were characterized using high-resolution electrospray ionization mass spectrometry (HRESIMS), nuclear magnetic resonance (1D and 2D NMR), and infrared (IR) spectroscopy. To reinforce the structural proposal, an acetylated derivative (6a) was obtained and its data compared to 6. Moreover, circular dichroism spectroscopy (CD) analysis was performed to determine the absolute stereochemistry, time-dependent density functional theory (TD-DFT) at the wB97X-D/def2-TZVP level, adopting functionals M06-2X and wB97X-D and base aug-cc-pVDZ, was employed to confirm the CD analysis. alkaloid 6, 6 , (6) campesterol, campesterol (campesterol βsitosterol, βsitosterol β sitosterol, sitosterol β-sitosterol stigmasterol, stigmasterol 3OβDglucopyranosylsitosterol OβDglucopyranosylsitosterol 3 O D glucopyranosylsitosterol 3OβDglucopyranosyl OβDglucopyranosyl glucopyranosyl wasshauseniana highresolution high resolution HRESIMS, HRESIMS (HRESIMS) 1D NMR, NMR NMR) IR (IR proposal 6a a (6a Moreover (CD stereochemistry timedependent time dependent TDDFT TD DFT (TD-DFT wB97XD/def2TZVP wB97XDdef2TZVP wBXDdefTZVP wB97X D/def2 TZVP def2 wB X def level M062X MX M06 2X M wB97XD wBXD augccpVDZ, augccpVDZ aug cc pVDZ, pVDZ aug-cc-pVDZ (6 (HRESIMS def2TZVP XD XDdef wBX Ddef2 Ddef D/def M0 ( defTZVP
3.
Multiresidue Method for Quantification of Nitroimidazoles, Anthelmintics, Amphenicols, and Dyes in Meat, Shrimp, and Fish by Using a Modified QuEChERS-type Extraction and Isotope Dilution Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry Nitroimidazoles Anthelmintics Amphenicols Meat Shrimp QuEChERStype QuEChERS type UltraHigh Ultra High ChromatographyTandem Chromatography Tandem
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Souza, Leonardo F. de
; Pereira, Felipe L. P.
; Silva, Alisson L. D.
; Lana, Mary Ane G.
; Paiva, Cristiana R. de
; Gloria, Matheus M. M. F.
; Fernandes, Wagner L.
; Nogueira, Raquel
.
Journal of the Brazilian Chemical Society
- Métricas do periódico
This paper presents an analytical multiresidue method for the quantification of 7 nitroimidazoles, 19 anthelmintics, 3 amphenicols, and 4 dyes in poultry, pork, beef, horse, shrimp, and fish samples by isotope dilution ultra-high performance liquid chromatography coupled with tandem mass spectrometry (UHPLC-MS/MS) in a single 6 min run. Samples were prepared using a modified quick, easy, cheap, effective, rugged and safe (QuEChERS)-type extraction with ethyl acetate and Na2SO4-NaCl (2:1), concentration into dimethyl sulfoxide (DMSO), and defatting by liquid-liquid extraction (LLE) with n-hexane. No clean-up using solid-phase extraction (SPE) cartridges or dispersive solid-phase extraction (DSPE) was necessary. The linearity ranges (in μg kg-1) were 0.10-0.60 for chloramphenicol, 0.50-3.0 for dyes, 1.5-9.0 for nitroimidazoles, and 5.0-30.0 for the other drugs. The limits of quantitation (LOQ) were established at the lowest calibration curve levels. Except for chloramphenicol in the horse matrix, analyte recovery and reproducibility were satisfactory (recovery (fREC): 75.0 to 116.6%; coefficient of variation (CV): 1.2 to 29.9%). For the unapproved substances and the substances with a maximum residue level (MRL), respectively, the decision limits (CCα) were 0.14-4.10 and 5.28-1003.60 μg kg-1, while the detection capabilities (CCβ) were 0.13-3.33 and 5.46-11.56 μg kg-1. nitroimidazoles 1 anthelmintics amphenicols poultry pork beef shrimp ultrahigh ultra high UHPLCMS/MS UHPLCMSMS UHPLC MS/MS MS (UHPLC-MS/MS run quick easy cheap effective QuEChERStype QuEChERS type Na2SO4NaCl NaSONaCl Na2SO4 NaCl Na SO 21, 21 2 , (2:1) DMSO, DMSO (DMSO) liquidliquid LLE (LLE nhexane. nhexane n hexane. hexane n-hexane cleanup clean up solidphase solid phase SPE (SPE DSPE (DSPE necessary kg1 kg kg-1 0.100.60 010060 0.10 0.60 0 10 60 0.10-0.6 0.503.0 05030 0.50 3.0 50 0.50-3. 1.59.0 1590 1.5 9.0 5 9 1.5-9. 5.030.0 50300 5.0 30.0 30 5.0-30. drugs LOQ (LOQ levels matrix fREC (fREC) 750 75 75. 116.6% 1166 116 CV (CV) 12 1. 29.9%. 299 29.9% . 29 29.9%) MRL, MRL (MRL) respectively CCα (CCα 0.144.10 014410 0.14 4.10 14 0.14-4.1 5.281003.60 528100360 5.28 1003.60 28 1003 5.28-1003.6 kg1, 1, CCβ (CCβ 0.133.33 013333 0.13 3.33 13 33 0.13-3.3 5.4611.56 5461156 5.46 11.56 46 11 56 5.46-11.5 kg1. UHPLCMS MSMS NaSO Na2SO (2:1 (DMSO kg- 100 0.100.6 01006 010 0.1 060 0.6 0.10-0. 503 0.503. 0503 050 0.5 3. 0.50-3 59 1.59. 159 15 90 9. 1.5-9 030 5.030. 5030 5. 300 30. 5.0-30 (fREC 116.6 (CV 29.9 (MRL 144 0.144.1 01441 014 410 4.1 0.14-4. 281003 5.281003.6 52810036 528 5.2 100360 1003.6 5.28-1003. 133 0.133.3 01333 013 333 3.3 0.13-3. 4611 5.4611.5 546115 546 5.4 1156 11.5 5.46-11. (2: 0.100. 0100 01 0. 06 0.10-0 0.503 05 0.50- 1.59 1.5- 03 5.030 5.0-3 116. 29. 0.144. 0144 41 4. 0.14-4 28100 5.281003. 5281003 52 10036 1003. 5.28-1003 0.133. 0133 0.13-3 461 5.4611. 54611 54 115 11. 5.46-11 (2 0.100 0.10- 5.03 5.0- 0.144 0.14- 2810 5.281003 528100 5.28-100 0.133 0.13- 5.4611 5461 5.46-1 ( 281 5.28100 52810 5.28-10 5.461 5.46- 5.2810 5281 5.28-1 5.281 5.28-
4.
Resumen: Consenso internacional para la nomenclatura y clasificación de la válvula aórtica bicúspide congénita y su aortopatía, con fines clínicos, quirúrgicos, intervencionistas y de investigación
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Michelena, Hector I.
; Corte, Alessandro della
; Evangelista, Arturo
; Maleszewski, Joseph J.
; Edwards, William D.
; Roman, Mary J.
; Devereux, Richard B.
; Fernández, Borja
; Asch, Federico M.
; Barker, Alex J.
; Sierra, Lilia M.
; Kerchove, Laurent de
; Fernandes, Susan M.
; Fedak, Paul W.M.
; Girdauskas, Evaldas
; Delgado, Victoria
; Abbara, Suhny
; Lansac, Emmanuel
; Prakash, Siddharth K.
; Bissell, Malenka M.
; Popescu, Bogdan A.
; Hope, Michael D.
; Sitges, Marta
; Thourani, Vinod H.
; Pibarot, Phillippe
; Chandrasekaran, Krishnaswamy
; Lancellotti, Patrizio
; Borger, Michael A.
; Forrest, John K.
; Webb, John
; Milewicz, Dianna M.
; Makkar, Raj
; Leon, Martin B.
; Sanders, Stephen P.
; Markl, Michael
; Ferrari, Victor A.
; Roberts, William C.
; Song, Jae-Kwan
; Blanke, Philipp
; White, Charles S.
; Siu, Samuel
; Svensson, Lars G.
; Braverman, Alan C.
; Bavaria, Joseph
; Sundt, Thoralf M.
; Khoury, Gebrine El
; Paulis, Ruggero de
; Enriquez-Sarano, Maurice
; Bax, Jeroen J.
; Otto, Catherine M.
; Schäfers, Hans-Joachim
.
Abstract This consensus of nomenclature and classification for congenital bicuspid aortic valve and its aortopathy is evidence-based and intended for universal use by physicians (both pediatricians and adults), echocardiographers, advanced cardiovascular imaging specialists, interventional cardiologists, cardiovascular surgeons, pathologists, geneticists, and researchers spanning these areas of clinical and basic research. In addition, as long as new key and reference research is available, this international consensus may be subject to change based on evidence-based data1.
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5.
Calibration of SARRA-H model for climatic risk zoning of cowpea in Eastern Amazon SARRAH SARRA H
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Souza, Paulo J. O. P.
; Pinto, João V. de N.
; Nunes, Hildo G. G. C.
; Souza, Everaldo B. de
; Santiago, Alailson V.
; Fernandes, Gabriel S. T.
; Rua, Matheus L.
; Farias, Vivian D. da S.
; Sousa, Denis de P.
.
Revista Brasileira de Engenharia Agrícola e Ambiental
- Métricas do periódico
RESUMO Esta pesquisa teve como objetivo calibrar e testar o modelo de cultura SARRA-H (Système d’Analyse Régionale des Risques Agroclimatologiques) para o caupi, bem como realizar o zoneamento de risco climático para esta cultura em uma região localizada na Amazônia Oriental, a fim de permitir a identificação de locais e datas de semeadura que favoreçam a produção considerando tanto o déficit hídrico como a probabilidade de ocorrência de chuvas severas durante o período da colheita. O modelo foi calibrado e validado com dados de experimentos realizados entre 2013 e 2016 no município de Castanhal, PA. As áreas de baixo risco climático foram definidas como aquelas que apresentaram índice de satisfação da necessidade hídrica (WRSI) maior ou igual a 0,5 na fase reprodutiva combinado com a ocorrência de chuvas abaixo de 20 mm na colheita por, pelo menos, 80% dos anos onde foi simulado o plantio. O modelo foi capaz de simular o balanço hídrico, crescimento e desenvolvimento do feijão-caupi nas condições climáticas e de solo da região estudada com boa precisão e exatidão. O período de ótima semeadura para o feijão-caupi compreende o intervalo entre 5 e 25 de junho para regiões localizadas acima de 2° S, e entre 25 de março e 15 de abril para regiões abaixo de 2º S. SARRAH SARRA H Système dAnalyse d Analyse Agroclimatologiques caupi Oriental 201 Castanhal PA WRSI (WRSI 05 0 0, 2 por menos 80 plantio feijãocaupi feijão exatidão S 1 º 8
ABSTRACT This study aimed to calibrate and test the SARRA-H (Système d’Analyse Régionale des Risques Agroclimatologiques) crop model for cowpea, as well as conducting a climate risk zoning for this crop in a region located in Eastern Amazon, allowing the identification of locations and sowing dates that favor the production considering both the water deficit and the probability of occurrence of severe rains during the harvest period. The model was calibrated and validated with data from experiments conducted between 2013 and 2016 in the municipality of Castanhal, PA, Brazil. Low climate risk areas were defined as those that had a water requirement satisfaction index (WRSI) greater than or equal to 0.5 in the reproductive phase combined with the occurrence of rainfall below 20 mm at the harvest for, at least, 80% of the years for which planting was simulated. The model was able to simulate the water balance, growth and development of cowpea under the climate and soil conditions of the studied location with high precision and accuracy. The optimal period for sowing cowpea comprises the interval between June 5th and 25th for regions located above 2° S and between March 25th and April 15th for regions below 2º S. SARRAH SARRA H Système dAnalyse d Analyse Agroclimatologiques Amazon 201 Castanhal PA Brazil WRSI (WRSI 05 0 5 0. 2 least 80 simulated balance accuracy th º 8
6.
Free-feeding organisms and galling insects (Hymenoptera) interactions on Caryocar brasiliense (Malpighiales: Caryocaraceae) trees, a savanna plant from Brazil
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Leite, G. L. D.
; Soares, M. A.
; Veloso, R. V. S.
; Silva, L. F.
; Guanabens, P. F. S.
; Munhoz, E. J. M.
; Pereira, W. R.
; Silva, R. S.
; Fernandes, G. W.
; Serrão, J. E.
; Zanuncio, J. C.
.
Resumo Insetos galhadores são abundantes na natureza, encontrados em muitos ecossistemas globalmente, com espécies atacando plantas de importância econômica. Os efeitos de herbívoros de alimentação livre na abundância de insetos galhadores em árvores de Caryocar brasiliense (Caryocaraceae) no Cerrado brasileiro (Savana) foram estudados. A porcentagem de desfolha e o número de ácaros fitófagos ou de Hemiptera fitófagos correlacionaram-se, negativamente, com a percentagem de folhas galhadas e de adultos do parasitoide Eurytoma sp. (Hymenoptera: Eurytomidae), respectivamente. Porcentagem de folhas galhadas e o número de Eurytoma sp. adultos e ácaros fitófagos correlacionaram-se, positivamente, com o de aranhas. Os números de ácaros e fitófagos Hemiptera correlacionaram-se, positivamente, com os de joaninhas e Sycophila sp. (Hymenoptera: Eurytomidae), respectivamente. O número de adultos de Ablerus magistretti Blanchard (Hymenoptera: Aphelinidae) correlacionou-se, negativamente, com Sycophila sp. O número de Agistemus sp. (Acari: Stigmaeidae) correlacionou-se, negativa e positivamente, com os de joaninhas e ácaros fitófagos, respectivamente. Herbívoros de alimentação livre afetaram a presença de insetos galhadores (Hymenoptera) em árvores de C. brasiliense, competindo por alimento e espaço. O mesmo foi observado entre dois parasitoides de Eurytoma sp., o que pode reduzir o controle biológico natural dessa praga.
Abstract Galling insects are abundant in nature, found in many ecosystems globally, with species attacking plants of economic importance. We studied the effects of free-feeding organisms on the abundance of galling insects on Caryocar brasiliense (Caryocaraceae) trees in the Brazilian Cerrado (Savanna). Percentage of defoliation and the number of phytophagous mites or number of phytophagous Hemiptera correlated negatively with percentage of galled leaves and the parasitoid Eurytoma sp. (Hymenoptera: Eurytomidae) adults, respectively. Percentage of galled leaves and the numbers of Eurytoma sp. adults and phytophagous mites correlated positively with spiders. Numbers of mites and Hemiptera phytophagous correlated positively with those of lady beetles and Sycophila sp. (Hymenoptera: Eurytomidae), respectively. The number of Ablerus magistretti Blanchard (Hymenoptera: Aphelinidae) adults correlated negatively with Sycophila sp. The number of Agistemus sp. (Acari: Stigmaeidae) correlated, negatively and positively, with those of lady beetles and phytophagous mites, respectively. Free-feeding herbivores affected the presence of galling insects (Hymenoptera) on C. brasiliense trees, competing for food and space. The same was observed between two parasitoids of Eurytoma sp. galling insect, which can reduce the natural biological control of this pest.
7.
First report and biological characteristics of Heterorhabditis amazonensis in the state of Paraná, Brazil
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Guide, B. A.
; Andaló, V.
; Ferreira, D. G.
; Alves, V. S.
; Fernandes, T. A. P.
; Neves, P. M. O. J.
.
Resumo Nematoides entomopatogênicos (NEP) das famílias Heterorhabditidae e Steinernematidae são amplamente utilizados no controle de insetos-pragas. No Brasil, os estudos relacionados a caracterização e identificação destes entomopatógenos são recentes e escassos. Nesse sentido, o objetivo deste estudo foi isolar NEP de amostras de solos coletadas em diferentes áreas no estado do Paraná, Brasil. Um isolado Heterorhabditis (UEL 08) detectado em amostra de solo em área de pastagem cultivada com braquiária, localizada em Londrina, Paraná, Brasil (23º34´311´´S, 050º58´298´´W), utilizando o método de “inseto-isca” com lagartas de Galleria mellonella. Para a identificação foram realizados estudos de morfometria e identificação molecular a partir da amplificação da região ITS. Algumas diferenças foram encontradas em termos de morfometria em comparação com a descrição original, entretanto, os dados moleculares demonstraram que a sequência obtida para o isolado UEL 08 é idêntica à sequência de referência de H. amazonensis (DQ665222), com a qual apresentou 100% de similaridade. Os estudos das características biológicas de H. amazonensis (UEL 08) revelaram que o isolado tem dois ciclos de vida distintos, um curto (216 h) e outro longo (288 h), sendo que ocorrem duas gerações em ambos os ciclos. O isolado UEL 08 H. amazonensis foi patogénico e virulento sobre os três hospedeiros avaliados. Notadamente, as larvas de G. mellonella e Alphitobius diaperinus foram consideradas mais susceptíveis do que os adultos do percevejo Dichelops (Diacereus) melacanthus, com percentagens de mortalidade de 100%, 85% e 46% de mortalidade, respectivamente. O ensaio de produção in vivo revelou um rendimento médio diário de 3,4 × 103 juvenis infectantes/g de larva hospedeira.
Abstract Entomopathogenic nematodes (EPNs) from Heterorhabditidae and Steinernematidae families are extensively used to control insect pests. In Brazil, however, relatively few studies have identified and characterized these entomopathogens. The objective of this study was to identify and characterize an EPN isolate obtained from soil samples collected in the state of Paraná, Brazil. An isolate (UEL 08) of Heterorhabditis was detected in a soil sample collected from a pasture area cultivated with Brachiaria grass in Londrina, state of Paraná, Brazil (23°34ʹ311ʹʹS, 050°58ʹ298ʹʹW), using the insect-baiting technique with Galleria mellonella larvae as hosts. The nematode was identified through morphometric studies and molecular analyses based on amplification of the rDNA ITS region. Although we identified certain morphometric differences compared with the original description, the molecular data indicated that the ITS sequence obtained for the UEL 08 isolate is identical to the reference sequence of H. amazonensis (DQ665222) and presented 100% similarity. Thus, the findings of our morphological and molecular studies confirmed that the isolated nematode is H. amazonensis, which is the first time this species has been registered in Paraná. Study of the biological characteristics of H. amazonensis (UEL 08) revealed that the isolate has two distinct life cycles – one short (216 h) and the other long (288 h) – and produces two generations in both cycles. We observed that H. amazonensis (UEL 8) was pathogenic and virulent to the three evaluated hosts, although with different virulence against these hosts. The larvae of G. mellonella and Alphitobius diaperinus were more susceptible than adult Dichelops (Diacereus) melacanthus, with 100%, 85%, and 46% mortality, respectively. Furthermore, an in vivo production assay revealed a mean daily yield of 3.4 × 103 infective juveniles/g host larvae.
8.
Biodegradation of the Antibiotic Doxycycline by Bacteria from the Gastrointestinal Tract of Cucurbit Beetles (Diabrotica speciosa) Diabrotica speciosa
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Madera, Karen Susana M.
; Durango, Luis Guillermo C.
; Martínez, Orfa Ines C.
; Silva, Maria Fátima G. F. da
; Fernandes, João B.
; Forim, Moacir R.
.
Journal of the Brazilian Chemical Society
- Métricas do periódico
Antibiotics can contaminate the environment as a result of improper disposal. The induction of doxycycline in the environment could give rise to lineages of the cucurbit beetle Diabrotica speciosa containing resistant endosymbiotic microorganisms, giving rise to bacterial strains capable of biodegrading these antibiotic residues. This work determined the relationship between the intestinal microbiota of D. speciosa and its ability to biodegrade an antibiotic. Bacterial strains of Enterobacter cloacae and Stenotrophomonas maltophila isolated from the gastrointestinal tract of D. speciosa were evaluated for the biodegradation of doxycycline. An analytical method for the extraction and quantification of doxycycline by high-efficiency liquid chromatography-ultraviolet detection (HPLC-UV) was developed and applied to monitor the biodegradation rates during bacterial growth for nutrient and nutrient-deficient media, both supplemented with the antibiotic. Degradation kinetics showed a decrease in antibiotic concentration after 96 h in saline medium, with recoveries of 63.1 and 87.7% for E. cloacae and S. maltophilia, respectively. Two degradation products were then identified and characterized from the liquid chromatography-high resolution mass spectrometry data after bioassays with E. cloacae. The gastrointestinal tract of insects such as D. speciosa can be a source of useful microbes for biotechnological processes such as the biodegradation of exogenous organic compounds in the environment. disposal microorganisms residues D highefficiency high efficiency chromatographyultraviolet chromatography ultraviolet HPLCUV HPLC UV (HPLC-UV nutrientdeficient deficient media 9 medium 631 63 1 63. 877 87 7 87.7 E S maltophilia respectively chromatographyhigh 6 8 87.
9.
Catálogo Taxonômico da Fauna do Brasil: Setting the baseline knowledge on the animal diversity in Brazil Brasil
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Boeger, Walter A.
; Valim, Michel P.
; Zaher, Hussam
; Rafael, José A.
; Forzza, Rafaela C.
; Percequillo, Alexandre R.
; Serejo, Cristiana S.
; Garraffoni, André R.S.
; Santos, Adalberto J.
; Slipinski, Adam
; Linzmeier, Adelita M.
; Calor, Adolfo R.
; Garda, Adrian A.
; Kury, Adriano B.
; Fernandes, Agatha C.S.
; Agudo-Padrón, Aisur I.
; Akama, Alberto
; Silva Neto, Alberto M. da
; Burbano, Alejandro L.
; Menezes, Aleksandra
; Pereira-Colavite, Alessandre
; Anichtchenko, Alexander
; Lees, Alexander C.
; Bezerra, Alexandra M.R.
; Domahovski, Alexandre C.
; Pimenta, Alexandre D.
; Aleixo, Alexandre L.P.
; Marceniuk, Alexandre P.
; Paula, Alexandre S. de
; Somavilla, Alexandre
; Specht, Alexandre
; Camargo, Alexssandro
; Newton, Alfred F.
; Silva, Aline A.S. da
; Santos, Aline B. dos
; Tassi, Aline D.
; Aragão, Allan C.
; Santos, Allan P.M.
; Migotto, Alvaro E.
; Mendes, Amanda C.
; Cunha, Amanda
; Chagas Júnior, Amazonas
; Sousa, Ana A.T. de
; Pavan, Ana C.
; Almeida, Ana C.S.
; Peronti, Ana L.B.G.
; Henriques-Oliveira, Ana L.
; Prudente, Ana L.
; Tourinho, Ana L.
; Pes, Ana M.O.
; Carmignotto, Ana P.
; Wengrat, Ana P.G. da Silva
; Dornellas, Ana P.S.
; Molin, Anamaria Dal
; Puker, Anderson
; Morandini, André C.
; Ferreira, André da S.
; Martins, André L.
; Esteves, André M.
; Fernandes, André S.
; Roza, André S.
; Köhler, Andreas
; Paladini, Andressa
; Andrade, Andrey J. de
; Pinto, Ângelo P.
; Salles, Anna C. de A.
; Gondim, Anne I.
; Amaral, Antonia C.Z.
; Rondón, Antonio A.A.
; Brescovit, Antonio
; Lofego, Antônio C.
; Marques, Antonio C.
; Macedo, Antonio
; Andriolo, Artur
; Henriques, Augusto L.
; Ferreira Júnior, Augusto L.
; Lima, Aurino F. de
; Barros, Ávyla R. de A.
; Brito, Ayrton do R.
; Romera, Bárbara L.V.
; Vasconcelos, Beatriz M.C. de
; Frable, Benjamin W.
; Santos, Bernardo F.
; Ferraz, Bernardo R.
; Rosa, Brunno B.
; Sampaio, Brunno H.L.
; Bellini, Bruno C.
; Clarkson, Bruno
; Oliveira, Bruno G. de
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; Prado, Joyce R. do
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; Almeida, Julia C.
; Kohler, Julia
; Gonçalves, Julia P.
; Beneti, Julia S.
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; Alvim, Juliana
; Almeida, Juliana C.
; Segadilha, Juliana L.
; Wingert, Juliana M.
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; Nascimento, Karine B.
; Schoeninger, Karine
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; Bologna, Marco A.
; Gottschalk, Marco S.
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; Bevilaqua, Marcus
; Santos, Marcus T.T.
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; Sallum, Maria A.M.
; Digiani, María C.
; Santarém, Maria C.A.
; Nascimento, Maria C. do
; Becerril, María de los A.M.
; Santos, Maria E.A. dos
; Passos, Maria I. da S. dos
; Felippe-Bauer, Maria L.
; Cherman, Mariana A.
; Terossi, Mariana
; Bartz, Marie L.C.
; Barbosa, Marina F. de C.
; Loeb, Marina V.
; Cohn-Haft, Mario
; Cupello, Mario
; Martins, Marlúcia B.
; Christofersen, Martin L.
; Bento, Matheus
; Rocha, Matheus dos S.
; Martins, Maurício L.
; Segura, Melissa O.
; Cardenas, Melissa Q.
; Duarte, Mércia E.
; Ivie, Michael A.
; Mincarone, Michael M.
; Borges, Michela
; Monné, Miguel A.
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; Fernandez, Monica A.
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; Reategui, Natália S.
; Pedro, Natan C.
; Pecly, Nathalia H.
; Ferreira Júnior, Nelson
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; Perioto, Nelson W.
; Hamada, Neusa
; Degallier, Nicolas
; Chao, Ning L.
; Ferla, Noeli J.
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; Evangelista, Olivia
; Shibatta, Oscar A.
; Oliveira, Otto M.P.
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; Gonçalves, Pablo R.
; Shimabukuro, Paloma H.F.
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; Santos, Paula B. dos
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; Silva, Paula K.R.
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; Passos, Paulo G.H.
; Corgosinho, Paulo H.C.
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ABSTRACT The limited temporal completeness and taxonomic accuracy of species lists, made available in a traditional manner in scientific publications, has always represented a problem. These lists are invariably limited to a few taxonomic groups and do not represent up-to-date knowledge of all species and classifications. In this context, the Brazilian megadiverse fauna is no exception, and the Catálogo Taxonômico da Fauna do Brasil (CTFB) (http://fauna.jbrj.gov.br/), made public in 2015, represents a database on biodiversity anchored on a list of valid and expertly recognized scientific names of animals in Brazil. The CTFB is updated in near real time by a team of more than 800 specialists. By January 1, 2024, the CTFB compiled 133,691 nominal species, with 125,138 that were considered valid. Most of the valid species were arthropods (82.3%, with more than 102,000 species) and chordates (7.69%, with over 11,000 species). These taxa were followed by a cluster composed of Mollusca (3,567 species), Platyhelminthes (2,292 species), Annelida (1,833 species), and Nematoda (1,447 species). All remaining groups had less than 1,000 species reported in Brazil, with Cnidaria (831 species), Porifera (628 species), Rotifera (606 species), and Bryozoa (520 species) representing those with more than 500 species. Analysis of the CTFB database can facilitate and direct efforts towards the discovery of new species in Brazil, but it is also fundamental in providing the best available list of valid nominal species to users, including those in science, health, conservation efforts, and any initiative involving animals. The importance of the CTFB is evidenced by the elevated number of citations in the scientific literature in diverse areas of biology, law, anthropology, education, forensic science, and veterinary science, among others. publications problem uptodate up date classifications context exception (CTFB http//fauna.jbrj.gov.br/, httpfaunajbrjgovbr http //fauna.jbrj.gov.br/ , jbrj gov br (http://fauna.jbrj.gov.br/) 2015 Brazil 80 specialists 1 2024 133691 133 691 133,69 125138 125 138 125,13 82.3%, 823 82 3 (82.3% 102000 102 000 102,00 7.69%, 769 7 69 (7.69% 11000 11 11,00 . 3,567 3567 567 (3,56 2,292 2292 2 292 (2,29 1,833 1833 833 (1,83 1,447 1447 447 (1,44 1000 1,00 831 (83 628 (62 606 (60 520 (52 50 users science health biology law anthropology education others http//fauna.jbrj.gov.br/ faunajbrjgovbr //fauna.jbrj.gov.br (http://fauna.jbrj.gov.br/ 201 8 202 13369 13 133,6 12513 12 125,1 82.3% (82.3 10200 10 00 102,0 7.69% 76 6 (7.69 1100 11,0 3,56 356 56 (3,5 2,29 229 29 (2,2 1,83 183 83 (1,8 1,44 144 44 (1,4 100 1,0 (8 62 (6 60 52 (5 5 http//fauna.jbrj.gov.br (http://fauna.jbrj.gov.br 20 1336 133, 1251 125, 82.3 (82. 1020 0 102, 7.69 (7.6 110 11, 3,5 35 (3, 2,2 22 (2, 1,8 18 (1, 1,4 14 4 ( 82. (82 7.6 (7. 3, (3 2, (2 (1 7. (7
10.
Induced reproduction of yellow-tailed lambari (Astyanax lacustris) with Ovopel® and buserelin acetate as alternatives to the protocol with carp pituitary extract yellowtailed yellow tailed Astyanax lacustris Ovopel
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Brasileiro, L. O.
; Povh, J. A.
; Spica, L. N.
; Silva, T. V.
; Stringhetta, G. R.
; Teodoro, G. C.
; Sousa, R. M.
; Fernandes, C. E.
; Campos, C. M.
; Kasai, R. Y. D.
; Teixeira, S. A.
; Côrrea-Filho, R. A. C.
.
Resumo O objetivo deste estudo foi avaliar as características reprodutivas em adultos de Astyanax lacustris submetidos a diferentes indutores da desova. Foram utilizadas 240 fêmeas (12,54 g ± 2,33 e 7,66 cm ± 0,63 cm) e 240 machos (5,83 g ± 0,39 g e 6,14 cm ± 0,64 cm), todos em idade reprodutiva. Três diferentes indutores foram avaliados: (i) 0,4 pellets de Ovopel®/kg de peso corporal; (ii) 0,5 ml de acetato de buserelina/kg de peso corporal; e (iii) Extrato de Pituitária de Carpa (CPE) (5,5 mg CPE/kg de peso corporal para fêmeas e 2,5 mg de CPE/kg de peso corporal para machos) e solução salina (sem hormônio). Horas-grau para desova foi maior (P<0,05) no tratamento com Ovopel® (204,93) do que no tratamento com CPE (183,2). O peso das gônadas e o índice gonadossomático foram maiores (P<0,05) nos tratamentos com CPE e Ovopel® quando comparados ao acetato de buserelina. O número de oócitos por fêmea, a fecundidade absoluta e relativa foram maiores (P<0,05) para os tratamentos com Ovopel® e CPE. A taxa de fertilização foi maior (P<0,05) no tratamento com acetato de buserelina (82,3%) em relação aos tratamentos com Ovopel® (72,33%) e CPE (62,40%); e maior (P<0,05) taxa de eclosão foi obtida nos tratamentos com acetato de buserelina e Ovopel®. O número de larvas por peso corporal da fêmea foi maior (P<0,05) quando utilizado Ovopel®. Conclui-se que Ovopel® é um indutor reprodutivo mais eficaz para a reprodução induzida de A. lacustris quando comparado ao CPE e ao acetato de buserelina. 24 12,54 1254 12 54 (12,5 233 2 33 2,3 766 7 66 7,6 063 0 63 0,6 5,83 583 5 83 (5,8 039 39 0,3 614 6 14 6,1 064 64 cm, , reprodutiva avaliados i (i 04 4 0, Ovopelkg Ovopel kg ii (ii 05 buserelinakg iii (iii (CPE 5,5 55 (5, CPEkg 25 2, sem hormônio. hormônio . hormônio) Horasgrau Horas grau P<0,05 P005 P (P<0,05 204,93 20493 204 93 (204,93 183,2. 1832 183,2 183 (183,2) 82,3% 823 82 3 (82,3% 72,33% 7233 72 (72,33% 62,40% 6240 62 40 (62,40%) Concluise Conclui se 12,5 125 1 (12, 23 76 7, 06 5,8 58 8 03 61 6, 5, (5 P<0,0 P00 (P<0,0 204,9 2049 20 9 (204,9 183, 18 (183,2 82,3 (82,3 72,33 723 (72,33 62,40 624 (62,40% 12, (12 ( P<0, P0 (P<0, 204, (204, (183, 82, (82, 72,3 (72,3 62,4 (62,40 (1 P<0 (P<0 (204 (183 (82 72, (72, 62, (62,4 P< (P< (20 (18 (8 (72 (62, (P (2 (7 (62 (6
Abstract The objective of this study was to evaluate reproductive traits in adults of Astyanax lacustris subjected to different spawning inducers. The study involved 240 females (12.54 g ± 2.33 and 7.66 cm ± 0.63 cm) and 240 males (5.83 g ± 0.39 g and 6.14 cm ± 0.64 cm), all at reproductive age. Three different inducers were evaluated: (i) 0.4 pellets of Ovopel®/kg of body weight; (ii) 0.5 ml of buserelin acetate/kg of body weight; and (iii) carp pituitary extract (CPE) (5.5 mg CPE/kg body weight for females and 2.5 mg CPE/kg body weight for males), as well as saline solution (without hormone). The degree-hours for spawning were greater (P<0.05) for the Ovopel® treatment (with 204.93) than in the treatment with CPE (183.2). Ovary weight and gonadosomatic index were higher (P<0.05) in CPE and Ovopel® treatments when compared to buserelin acetate. The number of oocytes per female, absolute and relative fecundity were greater (P<0.05) for Ovopel® and CPE treatments. Fertilization rate was higher (P<0.05) in treatment with buserelin acetate (82.3%) in relation to Ovopel® (72.33%) and CPE (62.40%) treatments, and the highest (P<0.05) hatching rates were achieved with buserelin acetate and Ovopel®. The number of larvae per female body weight was greater (P<0.05) when Ovopel® was used. In conclusion, Ovopel® proves to be a more effective reproductive inducer for induced reproduction of A. lacustris when compared to CPE and buserelin acetate. 24 12.54 1254 12 54 (12.5 233 2 33 2.3 766 7 66 7.6 063 0 63 0.6 5.83 583 5 83 (5.8 039 39 0.3 614 6 14 6.1 064 64 cm, , age evaluated i (i 04 4 0. Ovopelkg Ovopel kg ii (ii 05 acetatekg iii (iii (CPE 5.5 55 (5. CPEkg 25 2. males, males) without hormone. hormone . hormone) degreehours degree hours P<0.05 P005 P (P<0.05 204.93 20493 204 93 183.2. 1832 183.2 183 (183.2) 82.3% 823 82 3 (82.3% 72.33% 7233 72 (72.33% 62.40% 6240 62 40 (62.40% used conclusion A 12.5 125 1 (12. 23 76 7. 06 5.8 58 8 03 61 6. 5. (5 P<0.0 P00 (P<0.0 204.9 2049 20 9 183. 18 (183.2 82.3 (82.3 72.33 723 (72.33 62.40 624 (62.40 12. (12 ( P<0. P0 (P<0. 204. (183. 82. (82. 72.3 (72.3 62.4 (62.4 (1 P<0 (P<0 (183 (82 72. (72. 62. (62. P< (P< (18 (8 (72 (62 (P (7 (6
11.
Determination of Coumarin in Mikania glomerata Infusions by Square-Wave Voltammetry Using a Boron-Doped Diamond Electrode SquareWave Square Wave BoronDoped Boron Doped
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Nóbrega, Denise M.
; Lourenço, Anabel S.
; Fernandes, David Douglas S.
; Lyra, Wellington S.
; Moreira, Edilene D. T.
; Diniz, Paulo Henrique G. D.
; Araújo, Mario C. U.
.
Journal of the Brazilian Chemical Society
- Métricas do periódico
Infusions of Mikania glomerata Sprengel (guaco) leaves are used in Brazil for the treatment of respiratory diseases. Coumarin is the chemical marker of guaco for quality control purposes. This work proposes a voltammetric methodology to determine coumarin by using a boron-doped diamond electrode. At pH 10 (0.1 mol L-1 Britton-Robinson buffer solution), coumarin is irreversibly oxidized around +1.77 V in a process predominantly controlled by diffusion. The methodology described here presented a linear range from 1.54 to 15.3 µg mL-1 with limits of detection and quantification of 0.20 and 0.62 µg mL-1, respectively. Analysis of variance confirmed the significance of the regression and the absence of lack-of-fit at the confidence level of 95%. Infusion of commercial guaco leaves was directly analyzed, and results were in agreement with high-performance liquid chromatography after applying the paired t-test at a confidence level of 95%. (guaco diseases purposes borondoped boron doped electrode 1 0.1 01 0 (0. L1 L L- BrittonRobinson Britton Robinson solution, solution , solution) 177 77 +1.7 diffusion 154 54 1.5 153 15 3 15. mL1 mL mL- 020 20 0.2 062 62 0.6 mL1, 1, respectively lackoffit lack fit 95 95% analyzed highperformance high performance ttest t test 0. (0 17 7 +1. 5 1. 02 2 06 6 9 ( +1 +
12.
Calcium pyruvate in the attenuation of the water deficit on the agro-industrial quality of ratoon sugarcane agroindustrial agro industrial
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Dias, M. S.
; Silva, F. A.
; Fernandes, P. D.
; Farias, C. H. A.
; Silva, I. J.
; Silva, M. F. C.
; Lima, R. F.
; Lacerda, C. N.
; Lima, A. M.
; Lima, V. R. N.
; Silva, A. A. R.
; Reis, L. S.
.
Resumo A cana-de-açúcar é uma das maiores commodities agrícolas, quando se considera o volume de exportação e o número de empregos gerados. A produção no Nordeste brasileiro, em geral, é baixa, decorrente de diversos fatores, entre eles, a irregularidade de distribuição das chuvas, o que realça a importância de estudos com vistas a minorar os efeitos deletérios do estresse hídrico. Nesse cenário, objetivou-se avaliar o piruvato de cálcio como atenuante do déficit hídrico sobre a qualidade agroindustrial da cana-de-açúcar no segundo ciclo de cultivo. O experimento foi conduzido em casa de vegetação da Universidade Federal de Campina Grande, onde foram testados cinco genótipos de cana-de-açúcar (G1- RB863129, G2- RB92579, G3- RB962962, G4- RB021754 e G5- RB041443) submetidos a três estratégias de manejo da irrigação (E1- Irrigação plena, E2- déficit hídrico com aplicação de 30 mM de piruvato de cálcio e E3- déficit hídrico sem aplicação de piruvato de cálcio), distribuídos em blocos casualizados, em esquema fatorial 5 × 3, com três repetições. O genótipo RB021754 sob déficit hídrico e sem aplicação foliar do piruvato de cálcio aumentou o teor de fibra (13,2%) e o peso do bolo úmido da cana (143,5 g). Os efeitos do déficit hídrico em genótipos de cana-de-açúcar são atenuados com aplicação exógena de 30 mM de piruvato de cálcio, com benefícios sobre o teor sacarose polarizada, teor de sacarose aparente do caldo, teor de sólidos solúveis, pureza, pol da cana corrigida, açúcares totais recuperáveis e massa de colmos, em relação as plantas sob déficit hídrico sem aplicação de piruvato de cálcio. canadeaçúcar açúcar agrícolas gerados brasileiro geral baixa fatores eles chuvas cenário objetivouse objetivou cultivo Grande G1 G (G1 RB863129 RB G2 RB92579 G3 RB962962 G4 RB02175 G5 RB041443 E1 E (E1 plena E2 3 E3 , cálcio) casualizados repetições 13,2% 132 13 2 (13,2% 143,5 1435 143 (143, g. g . g) polarizada caldo solúveis pureza corrigida colmos (G RB86312 RB9257 RB96296 RB0217 RB04144 (E 13,2 1 (13,2 143, 14 (143 RB8631 RB925 RB9629 RB021 RB0414 13, (13, (14 RB863 RB92 RB962 RB02 RB041 (13 (1 RB86 RB9 RB96 RB0 RB04 ( RB8
Abstract Sugarcane is one of the largest agricultural commodities when considering the export volume and the number of jobs generated. Sugarcane production in the Brazilian Northeast region is generally low due to several factors, including the irregular rainfall distribution, which highlights the importance of studies aimed at mitigating the deleterious effects of water stress. In this scenario, this study aimed to evaluate calcium pyruvate as a water deficit attenuator on the agro-industrial quality of sugarcane in the second cycle of cultivation. The experiment was conducted out under greenhouse conditions of the Federal University of Campina Grande, where five sugarcane commercial genotypes tested (G1- RB863129, G2- RB92579, G3- RB962962, G4- RB021754, and G5- RB041443) and three irrigation management strategies (E1- full irrigation, E2- water deficit with application of 30 mM of calcium pyruvate, and E3- water deficit without calcium pyruvate application), distributed in randomized blocks in 5 × 3 factorial arrangement with three replications. The RB021754 genotype under water deficit and without foliar application of calcium pyruvate increased the fiber content (13.2%) and the sugarcane moist cake weight (143.5 g). The effects of water deficit in sugarcane genotypes are attenuated by the exogenous application of 30 mM of calcium pyruvate, with benefits on the polarized sucrose content, apparent sucrose content of the juice, soluble solids content, purity, corrected cane POL, total recoverable sugars, and stem mass in relation to plants under water deficit without calcium pyruvate application. generated factors distribution stress scenario agroindustrial agro industrial cultivation Grande G1 G (G1 RB863129 RB G2 RB92579 G3 RB962962 G4 G5 RB041443 E1 E (E1 E2 E3 application, , application) replications RB02175 13.2% 132 13 2 (13.2% 143.5 1435 143 (143. g. g . g) juice purity POL sugars (G RB86312 RB9257 RB96296 RB04144 (E RB0217 13.2 1 (13.2 143. 14 (143 RB8631 RB925 RB9629 RB0414 RB021 13. (13. (14 RB863 RB92 RB962 RB041 RB02 (13 (1 RB86 RB9 RB96 RB04 RB0 ( RB8
13.
Salicylic acid does not relieve salt stress on gas exchange, chlorophyll fluorescence, and hydroponic melon growth exchange fluorescence
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Fátima, R. T.
; Dantas, M. V.
; Lima, G. S.
; Oliveira, V. K. N.
; Soares, L. A. A.
; Silva, A. A. R.
; Gheyi, H. R.
; Guedes, M. A.
; Nóbrega, J. S.
; Fernandes, P. D.
.
Resumo O objetivo deste trabalho foi avaliar as aplicações do ácido salicílico como atenuador dos efeitos deletérios da solução nutritiva salina sobre a fisiologia e o crescimento do melão 'Gaúcho' cultivado em sistema hidropônico NFT. O experimento foi conduzido em casa de vegetação, em Pombal - PB, Brasil. O sistema de cultivo utilizado foi a técnica do fluxo laminar de nutrientes - NFT. Foi utilizado um delineamento inteiramente casualizado em parcelas subdivididas, sendo a parcela referente a quatro níveis de salinidade de solução nutritiva - CEsn (2,1 controle, 3,2, 4,3 e 5,4 dS m-1) e a subparcelas quatro concentrações de ácido salicílico - AS (0, 1,5, 3,0 e 4,5 mM), aplicado via pulverização foliar, com seis repetições. A solução nutritiva de 4,3 e 5,4 dS m-1 condutividade elétrica promove maior fluorescência máxima e variável, respectivamente. A condutância estomática, a transpiração, o diâmetro do caule, o comprimento do ramo principal, a massa seca da folha e a massa seca do caule do meloeiro ‘Gaúcho’ diminuiu com o aumento da salinidade da solução nutritiva. O ácido salicílico aumenta a fluorescência inicial e o comprimento do ramo principal do meloeiro ‘Gaúcho’ em cultivo hidropônico. O ácido salicílico na concentração de 1,5 a 4,5 mM não atenuou os efeitos do estresse salino sobre a concentração interna de CO2, taxa de assimilação de CO2 e massa seca da raiz do meloeiro 'Gaúcho'. Gaúcho 'Gaúcho NFT vegetação PB Brasil subdivididas 2,1 21 2 1 (2, controle 32 3 3,2 43 4 4, 54 5 5, m1 m 0, 0 (0 15 30 3, 45 mM, , mM) foliar repetições m- variável respectivamente estomática transpiração ‘Gaúcho 1, CO Gaúcho. . 2, (2 (
Abstract The objective of this study was to evaluate the salicylic acid applications in attenuating the harmful effects of saline nutrient solution on the physiology and growth of 'Gaúcho' melon cultivated in the NFT hydroponic system. The experiment was conducted in a greenhouse, in Pombal-PB, Brazil. The cultivation system used was the Nutrient Film Technique - NFT hydroponics. A completely randomized split-plot design was used, with the plot referring to four levels of salinity in the nutrient solution - ECns (2.1 control, 3.2, 4.3, and 5.4 dS m-1) and the sub-plot four concentrations of salicylic acid (SA) (0, 1.5, 3.0, and 4.5 mM), applied via foliar spray, with six replications. Nutrient solution of 4.3 and 5.4 dS m-1 electrical conductivity promotes higher maximum and variable fluorescence, respectively. The stomatal conductance, transpiration, stem diameter, main branch length, leaf dry mass, and stem dry mass of ‘Gaúcho’ melon plants decrease with the increase in salinity of the nutrient solution. Salicylic acid increases the initial fluorescence and the main branch length of ‘Gaúcho’ melon plants in hydroponic cultivation. Salicylic acid at a concentration of 1.5 to 4.5 mM did not attenuate the effects of salt stress on the internal CO2 concentration, CO2 assimilation rate, and root dry mass of 'Gaúcho' melon plants. Gaúcho 'Gaúcho greenhouse PombalPB, PombalPB Pombal PB, PB Pombal-PB Brazil hydroponics splitplot split 2.1 21 2 1 (2. control 32 3 3.2 43 4 54 5 5. m1 m subplot sub SA (SA 0, 0 (0 15 30 3.0 45 4. mM, , mM) spray replications m- respectively conductance transpiration diameter ‘Gaúcho 1. CO rate 2. (2 3. (
14.
Edessa meditabunda (Hemiptera: Pentatomidae) feeding on Physalis peruviana (Solanaceae) in the highlands of Brazil
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Soares, M. A.
; Faustino-Júnior, W.
; Castro, B. M. C.
; Fernandes, J. A. M.
; Leite, G. L. D.
; Zanuncio, J. C.
.
https://doi.org/10.1590/1519-6984.248566
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15.
Valorization of Hesperidin from Citrus Residues: Evaluation of Microwave-Assisted Synthesis of Hesperidin-Mg Complex and Their Insecticidal Activity
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Silva, Danielle F. da
; Bomfim, João P. A.
; Marchi, Rafael C.
; Amaral, Jéssica C.
; Pinto, Luciano S.
; Carlos, Rose M.
; Ferreira, Antonio G.
; Forim, Moacir R.
; Fernandes, João B.
; Silva, Maria F. G. F. da
; Oliveira, Regiane C. de
; Buss, David
; Kirk, William D. J.
; Bruce, Toby J. A.
.
Journal of the Brazilian Chemical Society
- Métricas do periódico
The aim of the current study was the valorization of hesperidin, the dominant flavonoid in citrus processing waste, by microwave-assisted synthesis of hesperidin-Mg complex, improving its antioxidant activity and insecticidal potential. Here we show, for the first time, that microwave-assisted synthesis of [Mg(hesp)2(phen)]OAc (1) (hesp: hesperidin, phen: phenanthroline) improve the reaction rate and yield. The nuclear magnetic resonance (NMR) experiments proved to be powerful tools for the identification of three isomers in metal complexes. Moreover, we explore the insecticidal potential of 1 and [Mg(phen)2(Isov)]OAc (2) (Isov : isovanillic acid) complexes against three insects. Complex 1 killed 80% of adults whitefly at 0.14 μmol L-1, and 2 76% at 0.36 μmol L-1. There was a total mortality of Spodoptera frugiperda with 2 at 0.39 μmol L-1, and 83% with 1 at 0.14 μmol L-1. Both have similar activity, and represent a novel group of insecticide for Bemisia tabaci and S. frugiperda; nevertheless, the benefits of both as Myzus persicae repellent require further evaluation.
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