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https://www.readbyqxmd.com/read/28068841/listeria-monocytogenes-behaviour-and-quality-attributes-during-sausage-storage-affected-by-sodium-nitrite-sodium-lactate-and-thyme-essential-oil
#1
Carla María Blanco-Lizarazo, Rubén Betancourt-Cortés, Angélica Lombana, Katerine Carrillo-Castro, Indira Sotelo-Díaz
The effects of the addition of nitrite at 200 ppm (N), sodium lactate 1.5% (L) and thyme essential oil at 100 ppm (T1) on Listeria monocytogenes behaviour and ATPase activity inhibition were evaluated, as well as lipid oxidation through the quantification of malonaldehydes, in sausage stored at 8 ℃ for 41 days and at 30 ℃ for 14 days. The changes in the colour profile were performed during storage time at 8 ℃. Quantitative descriptive sensory analyses were performed after two days at 4 ℃...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/28063268/evaluation-of-the-quality-of-herbal-teas-by-dart-tof-ms
#2
Jana Prchalová, František Kovařík, Aleš Rajchl
The paper focuses on the optimization, settings and validation of direct analysis in real time (DART) coupled with time of flight detector (TOF) when used for the evaluation of the quality of selected herbal teas (fennel, chamomile, nettle, linden, peppermint, thyme, lemon balm, marigold, sage, rose hip, St. John's Wort). The ionization mode, the optimal ionization temperature and the type of solvent for sample extraction were optimized. The characteristic compounds of the analysed herbal teas (glycosides, flavonoids, phenolic and terpenic substances, such as chamazulene, anethole, menthol, thymol, salviol, hypericin etc...
January 7, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/27994215/antimicrobial-activity-of-basil-oregano-and-thyme-essential-oils
#3
REVIEW
Hercules Sakkas, Chrissanthy Papadopoulou
For centuries plants have been used for a wide variety of purposes, from treating infectious diseases to food preservation and perfume production. Presently, the increasing resistance of microorganisms to currently used antimicrobials in combination with the appearance of emerging diseases requires urgently the development of new, more effective drugs. Plants, due to the large biological and structural diversity of their components, constitute a unique and renewable source for the discovery of new antibacterial, antifungal and antiparasitic treatments...
December 20, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27987818/antioxidant-edible-films-based-on-chitosan-and-starch-containing-polyphenols-from-thyme-extracts
#4
Emma Talón, Kata T Trifkovic, Viktor A Nedovic, Branko M Bugarski, María Vargas, Amparo Chiralt, Chelo González-Martínez
The aim of this study was to analyse the antioxidant activity of different polymeric matrices based on chitosan and starch, incorporating a thyme extract (TE) rich in polyphenols. TE provided the films with remarkable antioxidant activity. When mixed with chitosan, the polyphenols interacted with the polymer chains, acting as crosslinkers and enhancing the tensile behaviour of films. The opposite effect was observed when incorporated into the starch matrix. All the films became darker, more reddish and less transparent when TE was incorporated...
February 10, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27976178/essential-oils-from-caraway-oregano-and-thyme-as-phytogenic-substances-to-enhance-gut-health-in-a-porcine-epithelial-cell-culture-model
#5
E Mayer, A Springler, J Stelzer, B Novak, G Schatzmayr
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27973970/potential-renoprotective-effects-of-rosemary-and-thyme-against-gentamicin-toxicity-in-rats
#6
Amal S Abdel-Azeem, Amany M Hegazy, Hala M Zeidan, Khadiga S Ibrahim, Eman M El-Sayed
Gentamicin (GM) is a drug used commonly against gram-negative bacteria. Its therapeutic use is mainly limited by its nephrotoxicity. This investigation was aimed at evaluating the nephroprotective effects of rosemary (RM; Rosmarinus officinalis) and thyme (TV; Thymus vulgaris) against GM toxicity. Rats were divided into four groups. Normal control group was treated intraperitoneally (i.p.) with saline; positive control group was administered GM 60 mg/kg/day i.p.; RM group was co-administered 8% RM aqueous extract, 10 mL/kg/day, orally with GM; and TV group was co-administered 8% TV aqueous extract orally, 10 mL/kg/day with GM...
December 14, 2016: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/27965057/visible-light-enhances-the-antimicrobial-effect-of-some-essential-oils
#7
María Soledad Marqués-Calvo, Francesc Codony, Gemma Agustí, Carlos Lahera
The photodisinfection is a topical, broad spectrum antimicrobial technology, targeting bacteria, virus, fungi, and protozoa effective for single cells as for biofilms. Natural molecules have been studied less than synthetic agents in the process but they are currently receiving great interest. Therefore, the aim of this study is to evaluate for the first time if non-coherent blue and red light enhances the antimicrobial activity of some essential oils when standard strains for antibiotic or fungicide tests are enlightened in vitro...
December 10, 2016: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/27929352/the-in-vitro-effect-of-garden-thyme-thymus-vulgaris-l-extract-on-brachyspira-hyodysenteriae
#8
József Kutasi, László Jakab, Viktor Jurkovich, Pál Rafai
Filtrates of a water extract of commercially available garden thyme (Thymus vulgaris L.) were used for studying its possible bactericidal effect on Brachyspira hyodysenteriae, the causative agent of swine dysentery, by agar-diffusion technique. Five of the six studied Brachyspira strains have proven to be sensitive and one moderately sensitive in the in vitro tests. It was concluded that water extract of garden thyme possesses inhibitory effects against B. hyodysenteriae. In vivo experiments are needed to check the validity of this conclusion...
December 2016: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/27914909/benefits-pitfalls-and-risks-of-phytotherapy-in-clinical-practice-in-otorhinolaryngology
#9
O Laccourreye, A Werner, L Laccourreye, P Bonfils
OBJECTIVES: To elucidate the benefits, pitfalls and risks of phytotherapy in the clinical practice of otorhinolaryngology. MATERIAL AND METHODS: The PubMed and Cochrane databases were searched using the following keywords: phytotherapy, phytomedicine, herbs, otology, rhinology, laryngology, otitis, rhinitis, laryngitis and otorhinolaryngology. Seventy-two articles (18 prospective randomized studies, 4 Cochrane analyses, 4 meta-analysis and 15 reviews of the literature) devoted to clinical studies were analyzed...
November 30, 2016: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/27914344/evaluation-of-thymus-vulgaris-plant-extract-as-an-eco-friendly-corrosion-inhibitor-for-stainless-steel-304-in-acidic-solution-by-means-of-electrochemical-impedance-spectroscopy-electrochemical-noise-analysis-and-density-functional-theory
#10
A Ehsani, M G Mahjani, M Hosseini, R Safari, R Moshrefi, H Mohammad Shiri
Inhibition performance of Thymus vulgaris plant leaves extract (thyme) as environmentally friendly (green) inhibitor for the corrosion protection of stainless steel (SS) type 304 in 1.0molL(-1) HCl solution was studied by potentiodynamic polarization, electrochemical impedance (EIS) and electrochemical noise measurements (EN) techniques. The EN data were analyzed with FFT technique to make the spectral power density plots. The calculations were performed by MATLAB 2014a software. Geometry optimization and calculation of the structural and electronic properties of the molecular system of inhibitor have been carried out using UB3LYP/6-311++G(∗∗) level...
November 16, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27904398/stability-of-rosmarinic-acid-in-aqueous-extracts-from-different-lamiaceae-species-after-in-vitro-digestion-with-human-gastrointestinal-enzymes
#11
Zoran Zorić, Joško Markić, Sandra Pedisić, Viljemka Bučević-Popović, Ivana Generalić-Mekinić, Katarina Grebenar, Tea Kulišić-Bilušić
The present study compares the gastrointestinal stability of rosmarinic acid in aqueous extracts of thyme, winter savory and lemon balm with the stability of pure rosmarinic acid. The stability of rosmarinic acid was detected after two-phase in vitro digestion process (gastric and duodenal) with human gastrointestinal enzymes. The concentration of rosmarinic acid in undigested and digested samples was detected using HPLC-DAD. Results showed that gastrointestinal stability of pure rosmarinic acid was significantly higher than that of rosmarinic acid from plant extracts after both gastric and intestinal phases of digestion...
March 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27884782/is-the-plant-associated-microbiota-of-thymus-spp-adapted-to-plant-essential-oil
#12
Alice Checcucci, Isabel Maida, Giovanni Bacci, Cristina Ninno, Anna Rita Bilia, Sauro Biffi, Fabio Firenzuoli, Guido Flamini, Renato Fani, Alessio Mengoni
We examined whether the microbiota of two related aromatic thyme species, Thymus vulgaris and Thymus citriodorus, differs in relation to the composition of the respective essential oil (EO). A total of 576 bacterial isolates were obtained from three districts (leaves, roots and rhizospheric soil). They were taxonomically characterized and inspected for tolerance to the EO from the two thyme species. A district-related taxonomic pattern was found. In particular, high taxonomic diversity among the isolates from leaves was detected...
November 21, 2016: Research in Microbiology
https://www.readbyqxmd.com/read/27884762/pleasantness-familiarity-and-identification-of-spice-odors-are-interrelated-and-enhanced-by-consumption-of-herbs-and-food-neophilia
#13
Antti Knaapila, Oskar Laaksonen, Markus Virtanen, Baoru Yang, Hanna Lagström, Mari Sandell
The primary dimension of odor is pleasantness, which is associated with a multitude of factors. We investigated how the pleasantness, familiarity, and identification of spice odors were associated with each other and with the use of the respective spice, overall use of herbs, and level of food neophobia. A total of 126 adults (93 women, 33 men; age 25-61 years, mean 39 years) rated the odors from 12 spices (oregano, anise, rosemary, mint, caraway, sage, thyme, cinnamon, fennel, marjoram, garlic, and clove) for pleasantness and familiarity, and completed a multiple-choice odor identification...
February 1, 2017: Appetite
https://www.readbyqxmd.com/read/27860473/use-of-plant-extracts-as-an-efficient-alternative-therapy-of-respiratory-tract-infections
#14
Karel Šmejkal, Veronika Rjašková
Medicinal plants are advantageously used in the treatment of respiratory tract diseases. Upper respiratory tract catarrh is one of the diseases associated with seasonal weakening of immunity, and therefore, plant drugs with a non-specific immunomodulation effect are often used. Such plants include, but are not limited to, Echinacea (Echinacea purpurea) and American ginseng (Panax quinquefolius). In combination with medicinal plants having antibacterial and antiseptic effects, such as thyme (Thymus vulgaris) and pelargonium (Pelargonium sidoides), they can constitute efficient help in the treatment of respiratory tract diseases, shorten the duration of the disease and reduce the need of antibiotic therapy...
2016: Ceská a Slovenská Farmacie
https://www.readbyqxmd.com/read/27857542/effect-of-thyme-and-rosemary-on-the-quality-characteristics-shelf-life-and-residual-nitrite-content-of-sausages-during-cold-storage
#15
Sang Keun Jin, Jung Seok Choi, Seung Jae Lee, Seung Yun Lee, Sun Jin Hur
The effects of thyme and rosemary on the quality characteristics of sausages during cold storage were investigated. Sausages were prepared with thyme and rosemary powder (1 and 2%) and stored for 6 weeks at 10℃. The pH was significantly decreased in sausages by addition of thyme and rosemary compared to that observed in the control before and after storage. At 4 weeks of storage, the residual nitrite content was decreased by thyme and rosemary compared to the control. Lightness (L*) and yellowness (b*) were increased during storage, whereas redness (a*) and whiteness (W) were decreased before and after storage by addition of thyme and rosemary...
October 31, 2016: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/27854151/essential-oils-from-thyme-thymus-vulgaris-chemical-composition-and-biological-effects-in-mouse-model
#16
Vaclav Vetvicka, Jana Vetvickova
Thymus species are popular spices and contain volatile oils as main chemical constituents. Recently, plant-derived essential oils are gaining significant attention due to their significant biological activities. Seven different thymus-derived essential oils were compared in our study. First, we focused on their chemical composition, which was followed up by testing their effects on phagocytosis, cytokine production, chemotaxis, edema inhibition, and liver protection. We found limited biological activities among tested oils, with no correlation between composition and biological effects...
December 2016: Journal of Medicinal Food
https://www.readbyqxmd.com/read/27853710/thymus-vulgaris-red-thyme-and-caryophyllus-aromaticus-clove-essential-oils-to-control-spoilage-microorganisms-in-pork-under-modified-atmosphere
#17
Serena D'Amato, Giovanni Mazzarrino, Chiara Rossi, Annalisa Serio, Clemencia Chaves López, Gaetano Vitale Celano, Antonello Paparella
In recent years, it has been confirmed that essential oils (EOs) exert antimicrobial activity as they are able to inhibit cell growth and inactivate microbial cells. The application of biopreservation strategies by means of EOs opens up interesting perspectives in the food industry, including meat production. The paper aims to evaluate the effects of Thymus vulgaris (red thyme) and Caryophyllus aromaticus (cloves) EOs on the development of the spoilage population of fresh pork packaged under modified atmosphere (MAP)...
June 3, 2016: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/27808421/identification-and-quantification-of-thymol-metabolites-in-plasma-liver-and-duodenal-wall-of-broiler-chickens-using-uhplc-esi-qtof-ms
#18
Jana Pisarčíková, Vladimíra Oceľová, Štefan Faix, Iveta Plachá, Angela I Calderón
In the present study, we aimed to develop a method for thymol sulfate and thymol glucuronide determination in plasma, liver, and duodenal wall of broiler chickens after feeding with a Thymus vulgaris essential oil at the different concentrations (0.01%, 0.05%, 0.1% w/w). UHPLC coupled with Accurate-Mass QTOF-MS was used for identification and quantification of thymol metabolites. A novel Waters Oasis Prime HLB SPE cartridges were applied to sample clean-up with extraction recoveries ranged from 85 to 92%. The presence of thymol glucuronide was confirmed by MS software according to molecular formula, score, mass error, and double bond equivalent...
November 3, 2016: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/27806565/fluorescent-pteridine-derivatives-as-new-markers-for-the-characterization-of-genuine-monofloral-new-zealand-manuka-leptospermum-scoparium-honey
#19
Nicole Beitlich, Tilo Lübken, Martin Kaiser, Lilit Ispiryan, Karl Speer
New Zealand manuka honey is well-known for its unique antibacterial activity. Due to its high price and limited availability, this honey is often subject to honey fraud. Two pteridine derivatives, 3,6,7-trimethyl-2,4(1H,3H)-pteridinedione and 6,7-dimethyl-2,4(1H,3H)-pteridinedione, have now been identified in New Zealand manuka honey. Their structures were elucidated by LC-QTOF-HRMS, NMR, and single-crystal X-ray diffraction after isolation via semipreparative HPLC. Their marker potential for authentic manuka honey was proved as both substances were detectable in neither the pollen-identical kanuka honey nor the nine other kinds of monofloral New Zealand honey analyzed (clover, forest, kamahi, pohutukawa, rata, rewarewa, tawari, thyme, and vipers bugloss)...
November 23, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27774115/upregulation-of-heme-oxygenase-1-in-response-to-wild-thyme-treatment-protects-against-hypertension-and-oxidative-stress
#20
Nevena Mihailovic-Stanojevic, Zoran Miloradović, Milan Ivanov, Branko Bugarski, Đurđica Jovović, Danijela Karanović, Una-Jovana Vajić, Draženka Komes, Jelica Grujić-Milanović
High blood pressure is the most powerful contributor to the cardiovascular morbidity and mortality, and inverse correlation between consumption of polyphenol-rich foods or beverages and incidence of cardiovascular diseases gains more importance. Reactive oxygen species plays an important role in the development of hypertension. We found that wild thyme (a spice plant, rich in polyphenolic compounds) induced a significant decrease of blood pressure and vascular resistance in hypertensive rats. The inverse correlation between vascular resistance and plasma heme oxygenase-1 suggests that endogenous vasodilator carbon monoxide generated by heme oxidation could account for this normalization of blood pressure...
2016: Oxidative Medicine and Cellular Longevity
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