Autores: informamos que, a partir do próximo fascículo (39/9), a revista Química Nova adotará a licença CC-BY. Mais informações a respeito dessa licença podem ser obtidas aqui.
The Board of Directors of the Sociedade Brasileira de Química-SBQ (publisher of the Química Nova-QN) decided that QN will adopt the full open access format in which authors are required to cover part of the publication costs for their articles. See more...
Anna De Falco; Daphne Schneider Cukierman; Rachel A. Hauser-Davis; Nicolás A. Rey*
Alzheimer's Disease is the prevalent cause of dementia worldwide. Unfortunately, as of yet, there is still no cure. The different molecular hypotheses behind this condition and their relation to available treatments and potential new drugs are discussed herein in detail.
María Juliana MaccarroneI,*; Cecilia LederhosI; Carolina BettiI; Nicolás CarraraI; Juan C. YoriI,II; Fernando Coloma PascualIII; Domingo LiprandiI,II; Carlos VeraI,II; Mónica QuirogaI,II
The catalyst 7.1WN/A was the most active and selective (94%) for the (Z)-alkene at 323 K. The selectivity of the catalyst compared favorably to that of the classical and more expensive Lindlar catalyst.
Lucas L. FrancoI; Wagner G. CanhestroII; Vítor L. S. CunhaII; José D. S. FilhoI; Ricardo J. AlvesII,*
Silver carbonate efficiently promoted the glycosylation of cyclohexanol with peracetylated N-phtaloyl-α-D-glucosaminyl halides as compared to other promoters: silver trifatle and Mercury (II) bromide/mercury (II) oxide. The reaction did not work with three other glycosyl donors.
Ana Cristina LüdtkeI; Deborah Pinheiro DickII,*; Celso AitaIII; Bruno PavanII; Luiza MorosinoII; Alexandre DonedaIII; Rafael Ricardo CantúIII
The addition of composted pig slurry, even in small amounts, to a sandy Acrisol affects the soil organic matter. As a consequence, the distribution of the humic fractions is altered, with an enhancement of humic acid micelles.
Muhammad AshfaqI,#; Muhammad Mahboob AhmedII; Salama ShaheenI; Rukhsana TabussamI; Gildardo RiveraIII,*
We report excellent antibacterial activity of organotin(IV) esters. The tendency for inhibition was found to be stronger against E. coli than other bacterial strains. Insecticidal toxicity was also determined.
Silas R. FerreiraI; Fabio R. BarreiraI; Luciana S. SpinelliI; Katia Z. LealII; Peter SeidlIII; Elizabete F. LucasI,IV,*
Optical micrographs of petroleum before (a) and after (b) asphaltene precipitation as a function of volume of n-heptane added.
Ana P. OliveiraI; Amanda L. GuimarãesI; Alessandra G. M. PachecoII; Camila S. AraújoII; Raimundo G. Oliveira JúniorI; Érica M. LavorI; Mariana G. SilvaI; Edigênia C. C. AraújoI; Rosemairy L. MendesI; Larissa A. RolimI; Marcília P. CostaIII; Henrique C. L. FariasIV,V; Cláudia do Ó PessoaIV,V; Norberto P. LopesVI; Lucas M. M. MarquesVI; Jackson R. G. S. AlmeidaI,*
This work isolates the compound 3',4',5-trihydroxy-6,7-dimethoxyflavone (cirsiliol) from the leaves of the cultivated Leonotis nepetifolia, and evaluates in vitro the crude ethanol extracts and phases with respect to their potential antimicrobial, cytotoxic, and antitumoral activity.
Paulo H. S. RibeiroI; Maria L. dos SantosI,*; Claudio A. G. da CamaraII; Flávia S. BornII; Christopher W. FaggIII
Eugenia species, widely dispersed in the cerrado, were investigated and study results indicate that their leaf essential oils feature notable amounts of α- and β-pinene, limonene, bicyclogermacrene, β-caryophyllene, spathulenol, and globulol, which exhibit acaricidal activity against T. urticae.
Flavio Dolores Martínez-Mancera; José Luis Hernández-López*
Schematic illustration of co-poly(L-lysine)-graft-(ε-N-[X-D-biotinyl]-L-lysine).
Cíntia de A. CustódioI,II; Simon J. GardenI,*
The title compounds were prepared by nucleophilic aromatic substitution of 2,4-dinitrochlorobenzene followed by regioselective reduction using stannous chloride suspended in EtOAc. The reduction products were characterized as the acetamide derivatives.
Emerson F. MarquesI; Paulo C. VieiraI; Richele P. SeverinoI,II,*
Acridone alkaloids inhibit the enzyme cathepsin L as reversible competitive inhibitors with respect to the substrate Z-FR-MCA.
Leandro W. HantaoI,*; Bruna R. ToledoII; Fabio AugustoII
The application of ionic liquids (IL) as sorbent materials has proven highly successful in chemistry mainly due to their unique chemical and physical properties. As stationary phases in gas chromatography (GC), IL exhibit a multitude of requisites to provide highly efficient separations, namely, high thermal stability, negligible vapor pressure, and unique solvation properties.
Paulo H. M. MarfilI,II,*; Felipe H. T. VasconcelosI; Márcia H. PontieriIII; Vânia R. N. TelisII
A spectrophotometric method was developed and validated for determining the microencapsulation efficiency of palm oil by complex coacervation.
Marcos A. A. Silva; Adhane T. D. Borges; Nelson R. Antoniosi Filho*
An assay was developed for use in petrol stations to determine the presence of biodiesel in diesel-biodiesel blends based on the visual observation of significant coloring of the products.
Carmen Silvia da S. SáI,*; Wildson Luiz P. SantosII
The identities of the basic education teacher, higher education professor and bachelor's degree in chemistry/researcher circulate during a person's undergraduate degree, and the motivation to take on one of the identities depends on intrinsic and extrinsic factors affecting students and professors.
Guilherme Antonio FinazziI,*; Carlos Ney MartinsII; Milton Duffles CapelatoIII; Luiz Henrique FerreiraIII
Low-cost teaching experiments that obeyed the principles of Green Chemistry were developed. Copper electrogravimetry experiments were used because visual changes may be easily observed, thus facilitating the didactic exploration of gravimetric and electrochemical concepts.
Antonio G. Sampaio de Oliveira FilhoII,*; Ana Paula de Lima BatistaII
The electronic spectrum of the I2 molecule is calculated using scientific computing tools.
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