Zobrazení zdroje stránky Merrillellison6906

Predictive microbiology methods were used to study the effect of carvacrol on the bacterial resistance to antimicrobials. [https://www.selleckchem.com/products/Rapamycin.html Rapamycin molecular weight] Our objective was to estimate the optimum dose of carvacrol at concentrations below its MIC value (Minimum Inhibitory Concentration). As a fluorescent marker, ethidium bromide (EtBr) was applied to Escherichia coli to acquire raw data. The accumulation of EtBr was measured by its fluorescence signal (Fs), in the unit of RFU (Relative Fluorescence Unit). The temporal change of the fluorescence values, at a constant concentration of carvacrol, was described by a saturation curve (primary model). The difference, within the observation interval, between the fitted initial and maximum fluorescent values was chosen as the primary parameter to be fitted in the secondary model a convex, asymmetric, bi-linear function of the carvacrol concentration changing between 0 and 0.5 MIC. Its breakpoint is the optimum value of the carvacrol, a cardinal parameter of the secondary model, where the chosen primary parameter assumes its highest value. This optimum was estimated with high uncertainty for individual experiments, but F-test showed that, with appropriate experimental and numerical procedure, its existence and value can be claimed with confidence. Our results demonstrate that the estimation of the optimum of the secondary model can be robust even if the full secondary model is uncertain.The purpose of the present study was to control the fermentation time and nitrite content of suancai prepared with Lactobacillus plantarum. According to analyses of the consumption amount and rate of nutrients, growth-stimulating nutrients, essential nutrients and nutrients accelerating the fermentation process of suancai, Asp, Thr, Glu, Cys, Tyr, Mg2+, Mn2+ and inosine were selected as additions to suancai prepared with L. plantarum. The fermentation time and nitrite content of suancai supplemented with nutrients and prepared with L. plantarum were shortened by 2 days and 5 days and reduced by approximately 0.1-fold and 0.7-fold, respectively, compared with unsupplemented suancai prepared with L. plantarum at 25 °C and 10 °C. The fermentation time and nitrite content of suancai supplemented with nutrients and prepared with L. plantarum were shortened by 6 days and 15 days and reduced by approximately 0.17-fold and 0.8-fold, respectively, compared with suancai undergoing spontaneous fermentation at 25 °C and 10 °C. Furthermore, no significant differences were observed in sensory properties in suancai. The results of this study indicated that certain nutrients accelerated the growth of L. plantarum and reduced the fermentation time and nitrite content of suancai prepared with L. plantarum. These findings help to establish a foundation for the practical use of nutrients to control the fermentation of suancai.It is important that hangover products are both safe and effective. The aims of the current study were to evaluate (a) the ingredients of currently marketed hangover treatments, (b) whether companies make disease modification claims for these products, and (c) the extent and quality of any independent scientific evidence on their efficacy and safety. Of eighty-two hangover products identified, the most common ingredients were vitamin B, vitamin C, milk thistle extract (silymarin), dihydromyricetin (DHM), and N-acetyl L-cysteine (NAC), often in combination. Fifty-one products (62.2% of the 82 evaluated products) contained one or more vitamins of which the dose exceeded the corresponding daily recommended intake level. For 9 (28.1%) of 32 products that reported the dose of Vitamin B3 and 2 (8.0%) of 25 products that reported the dose of Vitamin B9 the corresponding tolerable upper intake level was exceeded. Further, in many other cases the dose of other ingredients was not reported (e.g., dosages of DHM and NAC were not reported by 59% and 73% of the products containing these ingredients), and corresponding tolerable upper limits are unknown. A review of scientific literature revealed no peer-reviewed human data demonstrating either safety or efficacy of any of the 82 evaluated hangover products. Further, the product name and/or package/insert included explicit disease modification claims in 64.6% of the products. Finally, 45.1% of the products contain NAC as an ingredient. As NAC is registered as a drug by the US Food and Drug Administration (FDA), it is prohibited as an ingredient in dietary supplements or foods. We conclude that, in the interest of consumers, independent research supporting the safety and efficacy of hangover treatments should be a minimum requirement for hangover treatment claims irrespective whether the products are registered as medicinal drugs or dietary supplements.<br /><br /> To test preliminary efficacy and acceptability of Invite Only VR A Vaping Prevention Game (Invite Only VR), an electronic cigarette (e-cigarette) prevention game that uses virtual reality (VR) hardware.<br /><br /> 285 adolescents (146 boys; ages 11-14; M=12.45years; SD=0.57) were enrolled in this non-equivalent control groups design through their middle school. Participants who played Invite Only VR for 1.5h were compared to treatment as usual at 4 timepoints baseline, post gameplay, 3 and 6months. Evidence of the efficacy of the game to influence e-cigarette use, e-cigarette knowledge, nicotine addiction knowledge, perceived addictiveness of e-cigarettes, perceived likelihood of using e-cigarettes, perceptions of harm, self-efficacy to refuse, social approval of e-cigarettes, and e-cigarette social perceptions was assessed using mixed between-within subjects ANOVAS. Intervention acceptability was indicated by measures of gameplay experience/satisfaction, VR experience, and perceived responsibility for game-based deay. Adolescents' satisfaction with the VR gameplay indicates preliminary intervention acceptability.Interpersonal stress is a commonly reported drinking-related problem and evidence indicates that it is associated with drinking to cope (DTC) motivation. The preponderance of evidence for DTC motivation as a risk factor for increased interpersonal stress, however, comes mainly from studies examining between-person associations. Findings suggest that individuals who commonly report drinking to cope with stress show higher average levels of drinking-related interpersonal problems. To better understand the dynamic processes linking DTC motivation with interpersonal stress, we used a micro-longitudinal design to examine whether nighttime drinking-episode specific levels of three subtypes of DTC motivation (DTC related to anxiety, depressive affect and anger) were associated with concurrent and next-day levels of interpersonal stress, controlling for drinking levels. Participants (N = 939) reported their drinking motives, drinking level, and drinking-related problems daily for 30 days during college and again approximately five years later (post-college).