Background: We continually look for better ways to slow down or hopefully even arrest the caries process. It is well known that oxygen, particularly in the form of ozone, can be effective in reducing the number of or even killing cariogenic microflora. Recently, a device had been developed to manufacture and deliver ozone in situ, on the tooth, with the intention of killing the caries-causing b...

While most adult Lepidoptera use flower nectar as their primary food source, butterflies in the genus Heliconius have evolved the novel ability to acquire amino acids from consuming pollen. Heliconius butterflies collect pollen on their proboscis, moisten the pollen with saliva, and use a combination of mechanical disruption and chemical degradation to release free amino acids that are subseque...

OBJECTIVES This study evaluated the percentages of continuous margins (%CM) and fracture strength (FS) of crowns made out from blocs of leucite-reinforced ceramic (IPS Empress CAD) and luted with a representative self-adhesive cement (RelyX Unicem) under four contaminating agents: saliva, water, blood, a haemostatic solution containing aluminium chloride (pH= 0.8) and a control group with no co...

OBJECTIVE The aim of this study was to investigate the coronal microleakage of endodontically treated teeth prepared to receive an intracanal post and teeth with an intracanal post but without a prosthetic crown and exposed to contamination by fresh human saliva. MATERIAL AND METHODS A mechanical-chemical preparation following the step-back technique was carried out in 35 extracted single-roo...

Pollen feeding behaviors Heliconius and Laparus (Lepidoptera: Nymphalidae) represent a key innovation that has shaped other life history traits of these neotropical butterflies. Although all flower visiting Lepidoptera regularly come in contact with pollen, only Heliconius and Laparus butterflies actively collect pollen with the proboscis and subsequently take up nutrients from the pollen grain...

Correspondence to: Paula Mathias Faculdade de Odontologia, Universidade Federal da Bahia Av. Araújo Pinho, 62, Canela, Salvador – BA, Brasil CEP 40110-060 Phone/Fax: + 55 71 3336-5776 E-mail: [email protected] Abstract This study aimed to investigate the influence of the moment of salivary contamination during the bonding procedure (before or after acid conditioning) on the microleakage around...

The possible effect of contrails in modifying the weather is reconsidered in the light of information obtained from ground-level contrails in Alaska. It appears likely that inadvertent cloud seeding b y jet aircraft may be of the same order of magnitude as that attained in commercial cloud seeding operations. Further investigation is needed; but in the meantime, the possibility of contrail cont...

Nasopharyngeal swabs are the most used in sample collecting for covid-19 tests SARS-CoV-2 molecular diagnosis. However, this sampling method presents some disadvantages, since, addition to being dependent on imported materials, it is invasive, causes discomfort patients, and risk of contamination medical collection team. This study aimed at validating saliva samples obtain viral RNA be diagnost...