Search results for "polis"
showing 10 items of 624 documents
Ultrastructural Alterations of Midgut Epithelium, but Not Greater Wing Fluctuating Asymmetry, in Paper Wasps (Polistes dominula) from Urban Environme…
2018
Polistes paper wasps can be used to monitor trace metal contaminants, but the effects of pollution on the health of these insects are still unknown. We evaluated, in a south-eastern area of Spain, whether workers of Polistes dominula collected at urban and rural sites differ in health of midgut tissue and in fluctuating asymmetry, an estimate of developmental noise. We found that wasps collected at the urban sites had abundant lead (Pb)-containing spherites, which were less visible in wasps from the rural sites. Evident ultrastructural alterations in the epithelium of the midgut of the wasps collected at the urban sites included broken and disorganized microvilli, a high amount and density …
Antibacterial Activity of Propolis Extracts from the Central Region of Romania against Neisseria gonorrhoeae
2021
(1) Background: Sexually transmitted infections (STIs) are among the most common infections worldwide, many of these being caused by Neisseria gonorrhoeae (NG). Increased antimicrobial NG resistance has been reported in recent decades, highlighting the need for new sources of natural compounds with valuable antimicrobial activity. This study aims to determine the effect of propolis extracts on NG strains, including antibiotic-resistant strains. (2) Methods: First void urine samples from presumed positive STI subjects were harvested. DNA was extracted, purified, and amplified via PCR for the simultaneous detection of 6 STIs. The presence of the dcmH, gyrA, and parC genes was checked in the D…
Antibacterial potency and fluoride release of a glass ionomer restorative material containing different concentrations of natural and chemical produc…
2018
Background This study investigated the antibacterial efficacy against Streptococcus mutans and fluoride release of a conventional glass ionomer (GI) contained natural and chemical agents. Material and methods Two hundred and ten GI specimens were divided into ten groups (n=21) according to the concentrations of the additives as; Propolis extract containing GI (Groups 1, 2, 3) with concentrations of 0.25%, 0.75% and 1.25% respectively, Miswak extract containing GI (Groups 4, 5, 6) and Chlorhexidine containing GI (Groups 7, 8, 9) with the same concentrations. The prepared specimens were subjected to antimicrobial activity by well diffusion, bacterial adherence, and fluoride release (from 2 to…
Effect of Propolis mouthwash on plaque and gingival indices over fixed orthodontic patients
2019
Background In patients with fixed orthodontics, the presence of orthodontic appliances causes dental plaque accumulation and hygiene problems. The purpose of this study was to evaluate the effect of Propolis and chlorhexidine mouthwashes on plaque and gingival indices in patients who are undergoing orthodontic treatment. Material and Methods In this triple blind study, in total, 37 patients aged from 15 to 35 years those who have been undergoing fixed orthodontic treatment were studied. After that, one of the mouthwashes that containing either Propolis or Chlorhexidine was randomly prescribed to patients. The patients were asked to use mouthwashes twice a day after brushing their teeth for …
Red propolis hydroalcoholic extract inhibits the formation of Candida albicans biofilms on denture surface
2020
Background To evaluate the antifungal activity of the red propolis hydroalcoholic extract (RPHE) against Candida albicans biofilms. Material and Methods The minimum inhibitory and fungicidal concentrations (MIC and MFC) of the RPHE were determined by the microdilution technique. C. albicans biofilms were formed on the surface of resin specimens preconditioned with artificial saliva (1h). The specimens (N=48) were equally divided according to the four solutions used for anti-biofilm evaluation (n=12 per group). After overnight incubation, biofilms were daily exposed (2x/day for 15 min) along 3 days with 3% RPHE, 0.12% chlorhexidine (CHX), 50,000 IU/mL nystatin (NYS) or saline (0.9% NaCl). Bi…
The antimicrobial activity of honey and propolis extracts from the central region of Romania
2021
Abstract Honey and propolis from Apis mellifera (bees) are products that have been used due to their multiple biological properties. The antimicrobial activity of 10 honey samples of known origin and 4 propolis extracts gathered from the same beekeepers located in Transylvania, Romania, were used against certain microorganisms: Escherichia coli, Staphylococcus aureus, Bacillus cereus, Pseudomonas aeruginosa and Candida albicans. The study also investigated the positive interaction of propolis aqueous extracts when used with poly-floral honey against the same microorganisms. The most sensitive to the activity of honey samples was the S. aureus strain (the largest inhibition area 18 mm) for p…
Provoke or encourage improvements? On semantic prosody in English-to-Polish translation
2021
Originally defined as an aura of meaning associated with words used together in a particular context, semantic prosody is a complex linguistic concept, and there is no agreement among researchers as to its precise definition and level of operationalization (word, phrase, text or discourse). Although there have been some studies on semantic prosody in translation, their findings are rather inconclusive and limited to individual words and phrases. Also, there has been no research on semantic prosody conducted so far in Polish-English translation. Intending to fill in this gap, this paper, grounded in corpus linguistics, showcases the role of semantic prosody in a selected English-to-Polish tr…
Comparing formulaicity of learner writing through phrase-frames: a corpus-driven study of Lithuanian and Polish EFL student writing
2018
Learner corpus research continues to provide evidence of how formulaic language is (mis)used by learners of English as a foreign language (EFL). This paper deals with less investigated multi-word units in EFL contexts, namely, phrase-frames (Fletcher 2002–2007), i.e. sets of n-grams identical except for one word (it is * to, in the * of). The study compares Lithuanian and Polish learner writing in English in terms of phrase-frames and contrasts them with native speakers. The analysis shows that certain differences between Lithuanian and Polish learners result from transfer from their native languages, yet both groups of learners share many common features. Most importantly, the phrase-frame…
STANCE BUNDLES IN ENGLISH-TO-POLISH TRANSLATION: A CORPUS-INFORMED STUDY
2018
In this paper, we make an attempt to improve the textual fit of English-to-Polish translation of a peculiar type of multi-word units known in corpus linguistic literature as lexical bundles (Biber et al. 1999). Inspired by a study conducted by Grabar and Lefer (2015), we used the English-Polish parallel corpus Paralela (Pezik 2016) and the National Corpus of Polish (NKJP) to extract and explore the use - in terms of frequency distributions - of the Polish equivalents of selected English lexical bundles expressing attitudinal and epistemic stance. More precisely, we used the NKJP corpus to check whether the Polish equivalents are typical of contemporary Polish as found in native texts. The r…
Estudio de alteraciones neurofisiológicas durante el sueño en pacientes con encefalopatía hepática mínima
2021
Una proporción importante de los pacientes con cirrosis y otras enfermedades hepáticas van a desarrollar una afectación del sistema nervioso central en forma de encefalopatía hepática. En fases iniciales, la clínica puede pasar desapercibida, estadio que da lugar al concepto de encefalopatía hepática mínima (EHM), que es habitualmente diagnosticada mediante test neuropsicológicos. Las alteraciones del sueño pueden ser las primeras manifestaciones neurológicas de la EHM y se asocian con una disminución de la calidad de vida. Existe un interés en la obtención de biomarcadores que permitan identificar a estos pacientes para su tratamiento precoz. La hipótesis del estudio parte de si la polisom…