Examining the Physicochemical Composition of Three Bioceramic Putties for Endodontic Use.

Objective: This study aimed to address the lack of comparative analyses of newly developed bioceramic materials by examining the chemical composition, thermodynamic profile, and microscopic surface features of three bioceramic putties: EndoSequence BC Root Repair Material Fast Set Putty (ESRRM-FS), BIO-C Repair (BCR), and Cera Putty (CP).

Methods: Samples of each of the three bioceramic putty obtained directly from manufacturers were prepared for analysis of physicochemical composition and microscopic features by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) imagery, and energy-disper-sive X-ray spectroscopy (EDS). The data obtained was qualitatively and statistically analysed.

Optimization of the biosynthesis of silver nanoparticles using bacterial extracts and their antimicrobial potential.

In the present study, silver nanoparticles (AgNPs) were biosynthesized using the supernatant and the intracellular extract of , and . The characterization of the AgNPs was carried out using UV-Vis spectroscopy, FTIR, DLS and TEM. Resazurin microtiter-plate assay was used to determine the antimicrobial action of AgNPs against UV-Visible spectra showed peaks between 414 and 460 nm.

Differential Volatile Organic Compound Expression in the Interaction of and .

Fungi exhibit a wide range of ecological guilds, but those that live within the inner tissues of plants (also known as endophytes) are particularly relevant due to the benefits they sometimes provide to their hosts, such as herbivory deterrence, disease protection, and growth promotion. Recently, endophytes have gained interest as potential biocontrol agents against crop pathogens, for example, coffee plants (). Published results from research performed in our laboratory showed that endophytic fungi isolated from wild Rubiaceae plants were effective in reducing the effects of the American leaf spot of coffee ().

Peptaibol Production and Characterization from and Their Action as Biofungicide.

Peptaibols (P), are a class of biologically active peptides isolated from soil, fungi and molds, which have interesting properties as antimicrobial agents. P production was optimized in flasks by adding sucrose as a carbon source, 2-aminoisobutyric acid (Aib) as an additive amino acid, and cell debris as an elicitor. P were purified, sequenced and identified by High-performance liquid chromatography (HPLC)coupled to mass spectrometry.

Evaluation of Surgical Bur Deformation and Bone Surface Roughness After Multiple Uses.

Purpose: The aim of the present in vitro study was to microscopically evaluate and describe the deformation of Lindeman surgical burs and the bone surface roughness after repeated osteotomies and sterilization cycles.

Materials And Methods: Twenty-one Lindeman surgical burs were analyzed under scanning electron microscopy (SEM) to evaluate the damage of the bur's integrity after 0, 1, 3, 5, 7, or 9 osteotomies on bovine ribs. Eighteen bone specimens were obtained after osteotomy for roughness analysis using profilometry.