Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"thymol"”.
-
Thymol synthesis by acid catalysed isopropylation of m-cresol
… to identify a suitable window of operation for thymol synthesis from iso-propanol and m-cresol mediated by a commercially available H-MFI zeolite catalyst. A preliminary investigation uncovered seeming anomalies in the course of the synthesis process, in particular counterintuitive trends with …
-
Thymol synthesis via alkylation of m-cresol with isopropanol the effect of the SiO2/AI2O3 ratio of H-MFI catalysts on catalyst activity and thymol selectivity
… the use of acid zeolites for the synthesis of thymol of selective isopropylation of m-cresol on the 6-position. The aim of this study was to investigate the effect of the SiO2/AI2O3 ration, i.e. the aluminium content of H-MFI (H-ZSM-5) zeolites. The results are interpreted based on a deep …
-
Systemische Verfügbarkeit und Pharmakokinetik von Thymol nach oraler Applikation einer thymianhaltigen Zubereitung im Menschen
… durchgeführt, um festzustellen, ob Thymol, das den Hauptbestandteil des ätherischen Thymianöls darstellt, zur Wirksamkeit dieser Zubereitung beitragen kann. Dazu wurde eine Extraktionsmethode für die Bestimmung von Thymol nach enzymatischer Spaltung des Phase-II-Konjugates …
-
Efeitos cronotropico e inotropico negativos induzidos pelo timol em ratos espontaneamente hipertensos
Thymol is a monoterpene present in the constitution of the essential oils of many plants and is well known for its broad spectrum antimicrobial activity and is also reported in the literature their activities on the cardiovascular system . Therefore , this study aimed to evaluate the chronotropic …
-
Investigação da atividade tocolítica do óleo essencial de Lippia microphylla Cham. (Verbenaceae) e dos seus constituintes majoritários, carvacrol e timol, em útero de rata.
… essential oil (LM - OE), which has carvacrol and thymol as major constituents . The aim of this work was to investigate and to characterize the tocolytic effect of LM - OE on rat uterus, as well as to verify if this effect is du e its isolated major constituents, carvacrol and thymol, or themself …
-
Towards a more efficacious treatment for Oropharyngeal Candidiasis (OPC): Hydrogel-forming tablets for the controlled release delivery of Chlorhexidine diacetate
… do not develop resistance against it. Thymol and farnesol were also tested individually and in combination with CHD to investigate a synergistic effect against Candida planktonic cells. The effects of CHD and thymol were investigated against C. albicans biofilm after two hours exposure …
-
Use of plant-derived essential oil compounds, naturally-occurring apple aroma compounds, and apple juice flavoring mixtures to control the growth of Escherichia coli O157:H7
… activity of three essential oil (EO) compounds (thymol, eugenol, and trans-cinnamaldehyde) alone and in combination with three naturally-occurring apple aroma (AA) compounds (hexanal, trans-2-hexenal and 1-hexanol) to identify the minimum inhibitory concentrations necessary to inhibit E. coli …
-
Incorporation of natural antimicrobial agents into starch-based material for food packaging
… of AM agents (carvacrol, linalool or thymol) into TPS films via a compression moulding technique; and (ii) by application of a coating containing the AM agents onto the commercial APTPS films.
-
Multi-techniques Characterization of Mechanochemically Synthesized Deep Eutectic Solvents
… V (Non-ionic DES, Menthol-Octanoic acid, Menthol-Thymol, Menthol-Camphor, and Thymol-Camphor); and (iii) Type VI (Therapeutic DES, Ibuprofen-Menthol) were synthesized using mechanochemical and thermochemical methods. The spectroscopic (FT-IR) investigation confirmed the formation of DES from both …
-
Use of plant-derived essential oil compounds and naturally-occurring apple flavor compounds to control foodborne pathogens in apple juice
… antimicrobial activity of three EO compounds (thymol, eugenol, and trans-cinnamaldehyde) alone and in combination with three naturally-occurring apple aroma compounds (hexanal, trans-2-hexenal and 1-hexanol) in order to identify combinations that lower the concentrations needed to destroy …
-
Development and evaluation of low density polyethylene-based antimicrobial food packaging films containing natural agents
… films containing naturally-derived AM agents, thymol or carvacrol, were developed. These agents were incorporated into a low-density polyethylene (LDPE) substrate using the techniques of both compression moulding and extrusion film blowing. Different film formulations containing additive …
-
The Effects of Miticides on the Reproductive Physiology of Honey Bee (Apis mellifera L.) Queens and Drones
… Check Mite+ (coumaphos), and Apilife VAR (74% thymol) on sperm production and viability in drones. Drones from colonies treated with each miticide were collected at sexual maturity. Sperm production was determined by counting the number of sperm in the seminal vesicles. Sperm for viability …
-
The Use of NaI As A Novel Radiographic Contrast Material For Differentiating Between Cavitated and Non Cavitated Carious Lesions
… Human pre-molar extracted teeth stored in thymol were collected in the Omaha area. 12 sound, cavitated, and non-cavitated white spot lesion surfaces were used for the experiment. Control exposures were made using Gendex Gx-770, 70 kVp, 0.1 secs, 7 mA with the digital intraoral sensor, XDR …
-
IN VITRO ANTIBACTERIAL ACTIVITY OF 12 COMMERCIAL MOUTHRINSE FORMULATIONS.
… menthol, 0.06% methyl salicylate, and 0.064% thymol, without alcohol), 9.) PerioShield Oral Health Rinse (formerly from Sunstar Americas, Inc.; containing 0.2% delmopinol hydrochloride plus 1.5% alcohol), 10.) Listerine Cool Mint (Johnson & Johnson Consumer, Inc.; containing essential oils …
-
Geochemical Significance of Biomarkers in Paleozoic Coals
… Isoborneol, Borneol, Fenychylalkohol, Kampher, Thymol und Carvacrol in vielen unreifen Proben des gesamten untersuchten Zeitintervalls wird in dieser Arbeit erstmals dokumentiert, Dies ist bemerkenswert da es zeigt, daß die Landpflanzen des Paläozoikums bereits die Fähigkeit besaßen, diese …
-
Actividad antibacteriana de extractos vegetales en cepas hospitalarias de "Staphylococcus aureus" con resistencia múltiple
… acid etil ester, phytol, cariophyllene, thymol and p-cymene. The studied compounds have a potential application as antibacterials for what is suggested to measure their pharmaceutical properties to establish their use as a therapeutic agents.
-
Ameliorative effects of phytochemical ingestion on viral infection in honey bees
… bees with viral particles and then feeding them thymol, carvacrol, p-coumaric acid, quercetin, or caffeine in a series of high-throughput bioassays, all of which were chosen based on their immune-boosting properties in honey bees. Among these candidates, caffeine was the only phytochemical …
-
Bioengineering strategies to improve functional qualities of nisin
… variants and low levels of plant essential oils (thymol, carvacrol, trans-cinnamaldehyde) significantly controlled Gram negative foodborne pathogens in in vitro assays compared to nisin A-essential oil combinations. This enhanced control was also evident in model food systems. Nisin variants used …
-
Development of bio-composites with novel characteristics through enzymatic grafting
… acid (GA), p-4-hydroxybenzoic acid (HBA), and thymol (T) were grafted onto the newly developed P(3HB)-EC and keratin-EC-based composites under laccase-assisted environment. Subsequently, the resulting bio-composites were removed from their respective casting surfaces under ambient environment …
Page 1 of 2