1. Phenolic content and antibacterial activity of extracts of Hamelia patens obtained by different extraction methods

Abstract Hamelia patens, is a plant traditionally used to treat a variety of conditions among the Huastec people of Mexico. The objective of this study is to characterize the phenolic content and critically examine the antimicrobial activity of leaf extracts H. patens, obtained by maceration, Soxhlet and percolation, using ethanol as 70% solvent. Phenolic co

Braz. J. Microbiol.. Publicado em: 2018-09

2. Study of pandrug and heavy metal resistance among E. coli from anthropogenically influenced Delhi stretch of river Yamuna

Abstract Escalating burden of antibiotic resistance that has reached new heights present a grave concern to mankind. As the problem is no longer confined to clinics, we hereby report identification of a pandrug resistant Escherichia coli isolate from heavily polluted Delhi stretch of river Yamuna, India. E. coli MRC11 was found sensitive only to tobramycin a

Braz. J. Microbiol.. Publicado em: 2018-09

3. Isoflavonoid composition and biological activity of extracts from soybean seedlings treated by different elicitors

Abstract Time-course and dose-response experiments were carried out to establish the ability for synthesizing isoflavonoids of soybean seedlings (cv. Soyica P34) treated with salicylic (SA) and isonicotinic acids (INA). Then, 25 structurally-related compounds were evaluated for their isoflavonoid-eliciting activity. Next, the antimicrobial and antioxidant ac

An. Acad. Bras. Ciênc.. Publicado em: 26/07/2018

4. Effects of enzymatic hydrolysis (Flavourzyme®) assisted by ultrasound in the structural and functional properties of hydrolyzates from different bovine collagens

Abstract This study aimed at evaluating the functional (antioxidant and antimicrobial activity) and structural properties of different bovine collagen hydrolysates obtained through ultrasound assisted enzymatic hydrolysis (Flavourzyme®). The use of previous or simultaneous ultrasound strengthened the enzymatic hydrolysis of bovine collagen samples, generat

Food Sci. Technol. Publicado em: 26/07/2018

5. Interaction study between vancomycin and liposomes containing natural compounds against methicillin-resistant Staphylococcus aureus clinical isolates

ABSTRACT The treatment of infections caused by resistant microorganisms is limited, and vancomycin (VAN) treatment failures for methicillin-resistant Staphylococcus aureus (MRSA) bacteremia are not uncommon, even when MRSA clinical isolates are susceptible to VAN. Thus, this study proposed the association of VAN with usnic acid and β-lapachone encapsulated

Braz. J. Pharm. Sci.. Publicado em: 26/07/2018

6. Synergistic antibacterial effect of statins with the complex {[1-(4-bromophenyl)-3-phenyltriazene N 3 -oxide-κ 2 N 1 ,O 4 ](dimethylbenzylamine-κ 2 C 1 ,N 4 )palladium(II)}

Abstract The treatment of infections caused by resistant microorganisms represents a big challenge in healthcare due to limited treatment options. For this reason, the discovery of new active substances which are able to perform innovative and selective actions is of great impact nowadays. Statins and triazenes (TZC) have consolidated as a promising class of

Braz. J. Pharm. Sci.. Publicado em: 26/07/2018

7. Acetylcholinesterase inhibition and antimicrobial activity of hydroxyl amides synthesized from natural products derivatives

ABSTRACT Thirteen natural products derivatives of hydroxyl amide class, three described for the first time, were synthesized by reaction of three indole acids and 3,4,5-trimethoxybenzoic acid with six different amino alcohols in the presence of triphenylphosphine and N-bromosuccinimide. The derivatives were tested against the Gram (+) bacteria Staphylococcus

An. Acad. Bras. Ciênc.. Publicado em: 25/06/2018

8. Determination of multidrug resistance mechanisms in Clostridium perfringens type A isolates using RNA sequencing and 2D-electrophoresis

In this study, we screened differentially expressed genes in a multidrug-resistant isolate strain of Clostridium perfringens by RNA sequencing. We also separated and identified differentially expressed proteins (DEPs) in the isolate strain by two-dimensional electrophoresis (2-DE) and mass spectrometry (MS). The RNA sequencing results showed that, compared w

Braz J Med Biol Res. Publicado em: 11/06/2018

9. Importance of the agar-media in the evaluation of bacteriocin activity against the same test-microorganisms

Abstract Bacteriocins are peptides produced by various species of bacteria, especially lactic acid bacteria, which exhibit a large spectrum of action against spoilage bacteria and foodborne pathogens. Successful application of techniques for quantitative or qualitative bacteriocin determination relies not only on the sensitivity of the test-microorganisms, b

Braz. J. Pharm. Sci.. Publicado em: 07/06/2018

10. PHYTOCHEMISTRY INVESTIGATION OF CASEARIA ARBOREA (RICH.) URB. (SALICACEAE) AND ANTIMICROBIAL ANALYSIS OF ITS DITERPENE

A phytochemical investigation from aerial parts of Casearia arborea (Rich.) Urb. (Salicaceae) led to isolation and identification of: sitosterol, 4-en-stigmast-3-one, 13-hydroxy-trans-ent-cleroda-3,14-diene,3-hydroxy-2-oxo-trans-ent-cleroda-3,14-diene (kolavelone), a mixture of 13-hydroxy-trans-ent-cleroda-3,14-diene and an ester ethyl hexadecanoate, kaempfe

Quím. Nova. Publicado em: 2018-06

11. Phytochemistry and antimicrobial activity of Campomanesia adamantium

ABSTRACT Campomanesia adamantium (Cambess.) O. Berg., Myrtaceae, is a plant popularly used for its anti-inflammatory, anti-diarrhoeal and urinary antiseptic activities. The aims of this study were to obtain the crude ethanolic extract and the hexane, dichloromethane, ethyl acetate, aqueous and concentrated aqueous tannin fractions from C. adamantium leaves,

Rev. bras. farmacogn.. Publicado em: 2018-06

12. Analysis of bacterial communities and characterization of antimicrobial strains from cave microbiota

Abstract In this study for the first-time microbial communities in the caves located in the mountain range of Hindu Kush were evaluated. The samples were analyzed using culture-independent (16S rRNA gene amplicon sequencing) and culture-dependent methods. The amplicon sequencing results revealed a broad taxonomic diversity, including 21 phyla and 20 candidat

Braz. J. Microbiol.. Publicado em: 2018-06