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Osmolarity

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https://www.readbyqxmd.com/read/29322584/effects-of-fixation-on-electrophysiology-and-structure-of-human-jejunal-villi
#1
Anna Casselbrant, Herbert F Helander
The villi of human jejunum vary in size and shape during different functional conditions. In the base the lamina propria is isotonic with blood, in the tip hyperosmotic. Here we study electrophysiological and morphological effects of incubation in hypotonic, isotonic, or hypertonic solutions, and to test various isotonic fixatives for microscopy. Samples of jejunal mucosae, obtained during surgery in obese patients, were studied in Ussing chambers where electrical parameters were registered during incubation in Krebs solution at various osmolarities, and during fixation in formaldehyde, glutaraldehyde, or osmium tetroxide (OsO4 )...
January 11, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29316923/comparative-assessment-of-probiotics-and-monensin-in-the-prophylaxis-of-acute-ruminal-lactic-acidosis-in-sheep
#2
Leonardo Frasson Reis, Rejane Santos Sousa, Francisco Leonardo Costa Oliveira, Frederico Augusto Mazzocca Lopes Rodrigues, Carolina Akiko Sato Cabral Araújo, Enoch Brandão Souza Meira-Júnior, Raimundo Alves Barrêto-Júnior, Clara Satsuki Mori, Antonio Humberto Hamad Minervino, Enrico Lippi Ortolani
BACKGROUND: Acute ruminal lactic acidosis (ARLA) is a major nutritional and metabolic disorder usually characterized by excessive or non-adapted intake of diets rich in nonstructural carbohydrates. Feed additives that regulate the ruminal environment have been used to prevent ARLA, such as ionophores and, more recently, yeast culture. Thus, we aimed to compare the efficacy of a yeast-based culture (Saccharomyces cerevisiae) with that of monensin sodium in the prevention of ARLA in sheep...
January 9, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29303581/pulsatile-gating-of-giant-vesicles-containing-macromolecular-crowding-agents-induced-by-colligative-nonideality
#3
Wan-Chih Su, Douglas L Gettel, Morgan Chabanon, Padmini Rangamani, Atul N Parikh
The ability of large macromolecules to exhibit nontrivial deviations in colligative properties of their aqueous solutions is well-appreciated in polymer physics. Here, we show that this colligative nonideality subjects giant lipid vesicles containing inert macromolecular crowding agents to osmotic pressure differentials when bathed in small-molecule osmolytes at comparable concentrations. The ensuing influx of water across the semipermeable membrane induces characteristic swell-burst cycles: here, cyclical and damped oscillations in size, tension, and membrane phase separation occur en route to equilibration...
January 5, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29300267/ocular-surface-workup-with-automated-noninvasive-measurements-for-the-diagnosis-of-meibomian-gland-dysfunction
#4
Giuseppe Giannaccare, Luca Vigo, Marco Pellegrini, Stefano Sebastiani, Francesco Carones
PURPOSE: To analyze diagnostic performance of an ocular surface workup based on automated noninvasive measurements in the diagnosis of meibomian gland dysfunction (MGD). METHODS: Two hundred ninety-eight eyes of 149 patients with MGD and 54 eyes of 27 control patients were analyzed. Ocular Surface Disease Index (OSDI), noninvasive breakup time (BUT), lipid layer thickness, meibomian gland loss, and tear osmolarity were calculated. The correlations among variables in the MGD group were analyzed...
January 3, 2018: Cornea
https://www.readbyqxmd.com/read/29300260/dry-eye-assessment-in-patients-with-vitiligo
#5
Sevil Karaman Erdur, Rukiye Aydin, Ali Balevi, Mustafa Ozsutcu, Mehmet Selim Kocabora
PURPOSE: To evaluate tear osmolarity and tear film parameters in patients with vitiligo. METHODS: A total of 25 eyes of 25 patients with vitiligo with periocular involvement (group 1), 30 eyes of 30 patients with vitiligo without periocular involvement (group 2), and 20 eyes of 20 controls (group 3) were evaluated using the Ocular Surface Disease Index (OSDI) questionnaire, Schirmer I test, tear film breakup time, scoring of ocular surface fluorescein staining using a modified Oxford scale, and tear osmolarity...
January 3, 2018: Cornea
https://www.readbyqxmd.com/read/29289724/disruption-of-the-cell-wall-integrity-gene-ecm33-results-in-improved-fermentation-performance-by-wine-yeast
#6
Jin Zhang, Maria A Astorga, Jennifer M Gardner, Michelle E Walker, Paul R Grbin, Vladimir Jiranek
Limiting assimilable nitrogen restricts yeast's ability to successfully complete fermentation. In the absence of a commercially available deletion collection in a wine yeast background, a screening approach was applied to a transposon library in a wine yeast derivative to identify clones with superior fermentation performance. Eight candidate genes, when disrupted by Ty insertion, were identified as enabling yeast to efficiently complete a model oenological fermentation with limited nitrogen availability. Analogous single gene disruptions were subsequently constructed in the haploid wine yeast strain, C911D and the performance of these during fermentation was analysed...
December 28, 2017: Metabolic Engineering
https://www.readbyqxmd.com/read/29288841/management-of-severe-traumatic-brain-injury-first-24-hours
#7
Thomas Geeraerts, Lionel Velly, Lamine Abdennour, Karim Asehnoune, Gérard Audibert, Pierre Bouzat, Nicolas Bruder, Romain Carrillon, Vincent Cottenceau, François Cotton, Sonia Courtil-Teyssedre, Claire Dahyot-Fizelier, Frédéric Dailler, Jean-Stéphane David, Nicolas Engrand, Dominique Fletcher, Gilles Francony, Laurent Gergelé, Carole Ichai, Etienne Javouhey, Pierre-Etienne Leblanc, Thomas Lieutaud, Philippe Meyer, Sébastien Mirek, Gilles Orliaguet, François Proust, Hervé Quintard, Catherine Ract, Mohamed Srairi, Karim Tazarourte, Bernard Vigué, Jean-François Payen
The latest French Guidelines for the management in the first 24hours of patients with severe traumatic brain injury (TBI) were published in 1998. Due to recent changes (intracerebral monitoring, cerebral perfusion pressure management, treatment of raised intracranial pressure), an update was required. Our objective has been to specify the significant developments since 1998. These guidelines were conducted by a group of experts for the French Society of Anesthesia and Intensive Care Medicine (Société Francaise d'Anesthésie Réanimation (SFAR)) in partnership with the Association de Neuro-Anesthésie-Réanimation de Langue Française (ANARLF), the Société Française de Neurochirurgie (SFN), the Groupe Francophone de Réanimation et d'Urgences Pédiatriques (GFRUP) and the Association des Anesthésistes-Réanimateurs Pédiatriques d'Expression Française (ADARPEF)...
December 27, 2017: Anaesthesia, Critical Care & Pain Medicine
https://www.readbyqxmd.com/read/29277067/biochemical-composition-of-fetal-fluids-in-at-term-normal-developed-healthy-viable-dogs-and-preliminary-data-from-pathologic-littermates
#8
M C Veronesi, B Bolis, M Faustini, A Rota, A Mollo
A proper canine neonatal assistance, required to reduce the high perinatal loss rate, imply a full knowledge about the fetal-to-neonatal physiology. Because fetal fluids play an important role throughout mammals pregnancy, influencing fetal growth and development, fetal well being, and contributing to guarantee the most suitable environment for the fetus, the knowledge about fetal fluids biochemical composition is of major importance. At first, the biochemical composition of fetal fluids collected by normal developed, healthy and viable newborns, is necessary to depict the normal features, and represent the first step for the further detection of abnormalities associated to fetal/neonatal distress and useful for the early identification of newborns needing special attention, immediately after birth...
December 14, 2017: Theriogenology
https://www.readbyqxmd.com/read/29276869/incidence-risk-factors-and-treatment-outcomes-of-drug-extravasation-in-pediatric-patients-in-china
#9
Ya-Min Yan, Mei Gong, Jia-Ling Chen, Dan Li, Ting-Ting Xu, Huan Zou, Ai-Qiu Li, Qiao-Ling Fan, Qun-Feng Lu
Yan YM, Gong M, Chen JL, Li D, Xu TT, Zou H, Li AQ, Fan QL, Lu QF. Incidence, risk factors and treatment outcomes of drug extravasation in pediatric patients in China. Turk J Pediatr 2017; 59: 162-168. Extravasation injury is a common phenomenon in hospitals. Failure to detect and treat extravasation injury can lead to irreversible local injuries, tissue necrosis and malfunction of the affected tissue. Until now, it is largely unknown about incidence, risk factors and treatment outcomes of extravasation in Chinese pediatric patients...
2017: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/29276571/draft-genome-sequence-of-dethiosulfovibrio-salsuginis-dsm-21565t-an-anaerobic-slightly-halophilic-bacterium-isolated-from-a-colombian-saline-spring
#10
Carolina Díaz-Cárdenas, Gina López, José David Alzate-Ocampo, Laura N González, Nicole Shapiro, Tanja Woyke, Nikos C Kyrpides, Silvia Restrepo, Sandra Baena
A bacterium belonging to the phylum Synergistetes, genus Dethiosulfovibrio was isolated in 2007 from a saline spring in Colombia. Dethiosulfovibrio salsuginis USBA 82T (DSM 21565T= KCTC 5659T) is a mesophilic, strictly anaerobic, slightly halophilic, Gram negative bacterium with a diderm cell envelope. The strain ferments peptides, amino acids and a few organic acids. Here we present the description of the complete genome sequencing and annotation of the type species Dethiosulfovibrio salsuginis USBA 82T. The genome consisted of 2...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/29276289/a-case-of-metronidazole-injection-infiltration-without-sequelae
#11
Andrew M North, Justin M Yee
Purpose: This report describes a case of metronidazole injection infiltration which contrasts the sole other case report in the literature at this time, as the patient described herein experienced mild signs and symptoms with prompt resolution and no significant sequelae. Summary: The patient experienced metronidazole injection infiltration during administration open to gravity via an 18-gauge peripheral catheter in the left brachial vein. The site was examined at bedside within approximately 30 minutes of the incident and was noted to be slightly edematous, erythemic, and painful in terms of a 5...
September 2017: Hospital Pharmacy
https://www.readbyqxmd.com/read/29276271/sodium-phosphates-injection-osmolarity-labeling-correction
#12
Robert Tindula
No abstract text is available yet for this article.
July 2017: Hospital Pharmacy
https://www.readbyqxmd.com/read/29274244/intracellular-potassium-under-osmotic-stress-determines-the-dielectrophoresis-cross-over-frequency-of-murine-myeloma-cells-in-the-mhz-range
#13
Colin Chung, Ronald Pethig, Stewart Smith, Martin Waterfall
Dielectrophoresis (DEP) has been widely studied for its potential as a biomarker-free method of sorting and characterizing cells based upon their dielectric properties. Most studies have employed voltage signals from ∼1 kHz to no higher than ∼30 MHz. Within this range a transition from negative to positive DEP can be observed at the cross-over frequency fx01 . The value of fx01 is determined by the conductivity of the suspending medium, as well as the size and shape of the cell and the dielectric properties (capacitance, conductivity) of its plasma membrane...
December 23, 2017: Electrophoresis
https://www.readbyqxmd.com/read/29261551/maximum-allowable-contrast-dose-and-prevention-of-acute-kidney-injury-following-cardiovascular-procedures
#14
Joe Aoun, Diala Nicolas, Jeremiah R Brown, Bertrand L Jaber
PURPOSE OF REVIEW: Contrast-induced acute kidney injury (CI-AKI) is a serious complication. Although nonmodifiable and modifiable risk factors have been thoroughly characterized, the utility of the maximal allowable contrast dose (MACD) has not received adequate attention. The focus of this review is to provide a critical appraisal of this modifiable risk factor. RECENT FINDINGS: Several retrospective and prospective cohort studies have demonstrated that the incidence of CI-AKI among patients receiving contrast media in volumes exceeding the MACD is consistently higher compared with those who do not exceed the MACD (an average of 24 vs...
December 18, 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/29261462/contrast-media-for-coronary-ct-angiography-should-an-iso-osmolar-agent-be-used
#15
U Joseph Schoepf
No abstract text is available yet for this article.
January 2018: Radiology
https://www.readbyqxmd.com/read/29249052/progressive-loss-of-hybrid-histidine-kinase-genes-during-the-evolution-of-budding-yeasts-saccharomycotina
#16
Anaïs Hérivaux, José L Lavín, Thomas Dugé de Bernonville, Patrick Vandeputte, Jean-Philippe Bouchara, Amandine Gastebois, José A Oguiza, Nicolas Papon
Two-component systems (TCSs) are widely distributed cell signaling pathways used by both prokaryotic and eukaryotic organisms to cope with a wide range of environmental cues. In fungi, TCS signaling routes, that mediate perception of stimuli, correspond to a multi-step phosphorelay between three protein families including hybrid histidine kinases (HHK), histidine phosphotransfer proteins (HPt) and response regulators (RR). The best known of these fungal transduction pathways remains the Sln1(HHK)-Ypd1(HPt)-Ssk1(RR) system that governs the high-osmolarity glycerol (HOG) mitogen-activated protein kinase (MAPK) pathway for osmo-adaptation in Saccharomyces cerevisiae...
December 16, 2017: Current Genetics
https://www.readbyqxmd.com/read/29246497/improved-in-vitro-corneal-delivery-of-a-thrombospondin-1-derived-peptide-using-a-liposomal-formulation
#17
Laura Soriano-Romaní, Jesús Álvarez-Trabado, Antonio López-García, Irene Molina-Martínez, Rocío Herrero-Vanrell, Yolanda Diebold
Peptide delivery to and through ocular sites is a growing field of research interest. However, several barriers restrict the permeation and bioavailability of these molecules to target tissues. The main pharmacological barriers of topical administration are the tear film, rapid drainage of the tear film, and poor corneal permeation. If the administered molecule is a peptide, instability and enzymatic degradation can be significant. Novel approaches such as the design and development of nanocarriers to overcome these drawbacks have been investigated with promising results...
December 12, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/29244757/expression-of-staphylococcal-enterotoxins-under-stress-encountered-during-food-production-and-preservation
#18
REVIEW
Jenny Schelin, Yusak Budi Susilo, Sophia Johler
Staphylococcal food poisoning (SFP) is the most prevalent cause of food-borne intoxications worldwide. Consumption of enterotoxins preformed in food causes violent vomiting and can be fatal in children and the elderly. While being repressed by competing bacteria in most matrices, Staphylococcus aureus benefits from crucial competitive advantages in foods with high osmolarity or low pH. During recent years, the long-standing belief in the feasibility of assessing SFP risk based on colony-forming units of S. aureus present in food products has been disproven...
December 15, 2017: Toxins
https://www.readbyqxmd.com/read/29226736/the-effect-of-major-adverse-renal-cardiovascular-event-marce-incidence-procedure-volume-and-unit-cost-on-the-hospital-savings-resulting-from-contrast-media-use-in-inpatient-angioplasty
#19
Eric Keuffel, Peter A McCullough, Thomas M Todoran, Emmanouil S Brilakis, Swetha R Palli, Michael P Ryan, Candace Gunnarsson
OBJECTIVE: Determine the net economic impact of switching from low-osmolar contrast media (LOCM) to iso-osmolar contrast media (IOCM; iodixanol) in patients undergoing inpatient coronary or peripheral angioplasty in the United States (US). METHODS: A budget impact model (BIM) was developed from a hospital perspective. Nationally representative procedural and contrast media prevalence rates, along with MARCE (major adverse renal cardiovascular event) incidence and episode-related cost data were derived from Premier Hospital Data (October 2014 to September 2015)...
December 11, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/29223651/effects-of-the-rigid-gas-permeable-contact-lense-use-on-tear-and-ocular-surface-among-keratoconus-patients
#20
Cansu Yuksel Elgin, Guzin Iskeleli, Ovgu Aydin
PURPOSE: To investigate changes in tear and ocular surface of patients with keratoconus using rigid gas permeable contact lenses (RGPCL) and compare them against keratoconus patients who were not using lenses as well as a control group of healthy subjects. METHODS: 24 keratoconus patients using RGPCL (Group 1) 22 patients who were not using lenses (Group 3) and 21 healthy subjects (Group 3) were included in the study. Subjective complaints about the subjects' eyes have been investigated using the ocular-surface disease index (OSDI)...
December 6, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
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