Study and characterization of a product based on a vegetable extract of quinoa fermented with water kefir grains.

This work aimed to study and characterize a product based on vegetable extract of quinoa (WVEQ) fermented with water kefir grains. The effect of sucrose concentration (SC), inulin concentration (IC), and xanthan gum (XG) concentration were evaluated using a central composite design (CCD) 23. They were subsequently characterized regarding cellular growth of the grains, beverage yield, pH, soluble solids, carbon dioxide (CO2) production, lactic acid, and ethanol production. Therefore, for the final stage, two formulations (F1 and F8) of the CCD were chosen to be characterized in terms of proximate composition, microbiological composition of the kefir culture, analysis of organic compounds, sensory analysis, and enzymatic and microbiological characterization before and after simulation of in vitro gastrointestinal digestion. In the two chosen products, one can see that fermentation optimized the bioavailability of proteins due to the high proteolytic activity of the microorganisms in kefir and the increase in lipid content. In identifying microorganisms, there was a prevalence of Saccharomyces sp. yeasts. In the sensory analysis, the F8 formulation showed better results than the F1 formulation. In vitro, gastrointestinal digestion showed reduced lactic acid bacteria and yeast and increased acetic acid bacteria in the liquid phase for both formulations. In the enzymatic profile, there was a reduction in all enzymes analyzed for both formulations, except for amylase in F1, which went from 14.05 U/mL to 39.41 U/mL. Therefore, it is concluded that using WVEQ as a substrate for the product appears to be a viable alternative with nutritional and technological advantages for serving a specific market niche.

[Intranasal lidocaine atomization as novel and noninvasive treatment option for postdural puncture headache : Two case reports from obstetric anesthesiology]. / Intranasale Lidocainvernebelung als neue und nichtinvasive Therapieoption des Postpunktionskopfschmerzes : Zwei Fallberichte aus der geburtshilflichen Anästhesiologie.

BACKGROUND: Postdural puncture headache (PDPH) occurs in up to 11% of patients after spinal anesthesia and in more than 80% after dural perforation upon epidural anesthesia. It represents a severe anesthesiological complication in obstetric patients. If conservative medication measures do not result in a timely relief of symptoms, the current guidelines recommend the early implementation of an epidural blood patch; however, although performing an epidural blood patch is effective to treat PDPH, potential side effects include neurological complications, spinal hematoma and infections. Assumed to reduce cerebral vasodilatation as a potential pathophysiological driver of PDPH, the transnasal block of the sphenopalatine ganglion with local anesthetics is discussed as an alternative approach. METHODS: In this case study a modification of this technique is reported using a mucosal atomization device (MAD) for off-label nasal administration of lidocaine in two obstetric patients suffering from PDPH. Up to now there is no experience with this modified technique in obstetric anesthesiology. RESULTS: The first patient (25-year-old secundigravida, body mass index [BMI] 54.7 kg/m2) displayed a pronounced PDPH with nausea and vomiting during the first day after a cesarean section under spinal anesthesia (3 attempts). The second patient (32-year-old tertiagravida, BMI 27.3 kg/m2) was readmitted to hospital due to PDPH 4 days after a natural birth under epidural anesthesia. Whereas conservative measures and therapeutic attempts with nonopioid analgesics and caffeine did not result in a sufficient treatment success, intranasal lidocaine administration via a MAD led to an immediate and persisting symptom relief. Both patients could be discharged from hospital after 24 h of surveillance and did not report any relevant side effects of the lidocaine administration. CONCLUSION: The described noninvasive and simple procedure represents a valuable addition to previously known treatment options for PDPH and a potential alternative to an epidural blood patch in obstetric patients with PDPH. Prospective studies are needed to validate the findings.

Evidence for a layer-dependent Ehrlich-Schwöbel barrier in organic thin film growth.

We report direct experimental evidence for a layer-dependent step-edge barrier in organic thin film growth, investigating di-indenoperylene on SiO_{2} as an archetypical system. In particular, we show that a noticeable Ehrlich-Schwöbel effect emerges only beyond the 3rd molecular layer, accompanied by mass step-upward diffusion. We further disclose that this thickness dependence of the interlayer transport is directly related to molecular reorientations during the first stages of the growth. This is ultimately responsible for a morphological transition from layer-by-layer growth to surface rapid roughening. These experimental findings should compel further development of molecular-scale models for organic thin film growth.