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https://www.readbyqxmd.com/read/29317681/the-effect-of-gravity-on-flame-spread-over-pmma-cylinders
#1
Shmuel Link, Xinyan Huang, Carlos Fernandez-Pello, Sandra Olson, Paul Ferkul
Fire safety is a concern in space travel, particularly with the current plans of increasing the length of the manned space missions, and of using spacecraft atmospheres different than in Earth, such as microgravity, low-velocity gas flow, low pressure and elevated oxygen concentration. In this work, the spread of flame over a thermoplastic polymer, polymethyl methacrylate (PMMA), was conducted in the International Space Station and on Earth. The tests consisted of determining the opposed flame spread rate over PMMA cylinders under low-flow velocities ranging from 0...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29290509/ambient-mass-spectrometry-for-rapid-diagnosis-of-psychoactive-drugs-overdose-in-an-unstable-patient
#2
Chi-Wei Lee, Yu-Ying Chao, Jentaie Shiea, Jheng-Heng Shen, Hei-Hwa Lee, Bai-Hsiun Chen
A 25-year-old man suffered from consciousness change was sent to our emergency department by friends who reported that they were not sure what had happened to him. Physical examination revealed bilateral pupils dilatation, lethargy, slurred speech, and ataxia. Computer-aided tomographic scan of the brain revealed no definite evidence of intracranial lesions. Routine laboratory tests revealed total physiological turmoil. Despite immediate commencement of aggressive treatment, the patient's condition deteriorated long before the traditional drug screen provided an answer for the identities of the multiple drugs overdose...
December 20, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29283238/molecular-mechanisms-of-action-of-gas-transmitters-no-co-and-h2s-in-smooth-muscle-cells-and-effect-of-no-generating-compounds-nitrates-and-nitrites-on-average-life-expectancy
#3
S V Gusakova, L V Smagliy, Y G Birulina, I V Kovalev, V Nosarev, I V Petrova, V P Reutov
Gaseous signaling molecules (gas transmitters) take an especial position among the numerous signaling molecules involved in the regulation of both intracellular processes that occur in different types of cells and cell-cell interactions. At present time, gas transmitters include three molecules whose enzymatic systems of synthesis and degradation, physiological action and intracellular effectors, the change of which under the action of gas transmitters may result in physiological and/or pathophysiological effects are well- determined...
January 2017: Uspekhi Fiziologicheskikh Nauk
https://www.readbyqxmd.com/read/29280704/reversible-pneumatosis-cystoides-intestinalis-after-liver-transplantation
#4
M Telegrafo, A A Stabile Ianora, G Angelelli, M Moschetta
Pneumatosis cystoides intestinalis (PCI) is a rare disease characterized by the presence of multiple gas-filled cysts within the submucosa or subserosa of the intestinal wall. We report a case of PCI in a 54-yearold man 4 weeks after liver transplantation due to hepatitis B virus (HBV)-associated liver cirrhosis presenting with illness, diarrhea and abdominal pain. CT scans revealed normal shape of the abdominal parenchymal organs and no intra-hepatic complication due to liver transplantation. Main abdominal venous and arterial vessels resulted patent...
September 2017: Il Giornale di Chirurgia
https://www.readbyqxmd.com/read/29276419/lessons-from-unilateral-loss-of-cilia-early-nasal-nitric-oxide-gas-mixing-and-the-role-of-sinus-patency-in-determining-nasal-nitric-oxide
#5
Kenneth Rodriguez, Benjamin Gaston, Jay Wasman, Nadzeya Marozkina
Nasal nitric oxide (nNO) measurement is a diagnostic test for primary ciliary dyskinesia (PCD). Here, we have shown the development of unilateral PCD-like symptoms associated with low nNO. A 60-year-old man had been previously healthy but developed unilateral, severe pansinusitis. He required surgical drainage of all left sinuses, and biopsies showed loss of the ciliated epithelium. At 4 weeks, he had unilateral (left-sided), profuse, clear rhinorrhea characteristic of PCD, and his surgical ostia were all patent endoscopically...
2017: Clinical Medicine Insights. Ear, Nose and Throat
https://www.readbyqxmd.com/read/29276229/severe-acute-respiratory-distress-syndrome-using-electrical-activity-of-the-diaphragm-on-weaning-from-extracorporeal-membrane-oxygenation
#6
Shuji Okahara, Kazuyoshi Shimizu, Hiroshi Morimatsu
The electrical activity of the diaphragm (EAdi) shows global diaphragmatic activation and power output from the central nervous system. We measured the EAdi as an indicator of breathing workload in a 40-year-old man suffering from severe acute respiratory distress syndrome (ARDS) secondary to influenza pneumonia in the process of weaning from extracorporeal membrane oxygenation (ECMO). Turning off the sweep gas flow immediately led to EAdi elevation, followed by hypoxia. The patient was successfully weaned from ECMO by reference to EAdi...
December 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/29260103/crystalline-lens-dislocation-secondary-to-bacterial-endogenous-endophthalmitis
#7
Amit Sangave, Rahul Komati, Allison Weinmann, Linoj Samuel, Uday Desai
Purpose: To present an unusual case of endogenous endophthalmitis secondary to Group A streptococcus (GAS) that resulted in dislocation of the crystalline lens. Observations: An immunocompetent 51-year-old man presented to the emergency room (ER) with upper respiratory infection (URI) symptoms and painful right eye. He was diagnosed with URI and viral conjunctivitis and discharged on oral azithromycin and polytrim eyedrops. He returned to the ER 30 h later with sepsis and findings consistent with endophthalmitis, including light perception only vision...
September 2017: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29258784/methemoglobinemia-in-a-case-of-paint-thinner-intoxication-treated-successfully-with-vitamin-c
#8
Deba Prasad Dhibar, Kamal Kant Sahu, Sanjay Jain, Savita Kumari, Subhash Chander Varma
BACKGROUND: Methemoglobin (MetHb) is an oxidized form of hemoglobin. It is a poor transporter of oxygen and is unable to deliver oxygen to the tissue. Globally, drug & toxin induced methemoglobinemia is more common as compared with the congenital form. Methemoglobinemia caused by paint thinner intoxication is rare. Methylene blue is well established as the first-line therapy for severe methemoglobinemia. CASE REPORT: A 25-year old man was brought to the Emergency Department after accidental consumption of paint thinner...
December 16, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29245639/the-black-coral-fauna-cnidaria-antipatharia-of-bermuda-with-new-records
#9
Daniel Wagner, Andrew Shuler
The black coral fauna of Bermudan waters is poorly known, in large part due to the logistical challenges of surveying deep-water (>50 m) environments where most species occur. In 2016, the Nekton Expedition sought to survey the deep-water biodiversity around Bermuda using manned submersibles and mixed-gas technical SCUBA. A total of 28 black coral specimens were collected, and these were examined based on skeletal spine morphology, polyp morphology, colony branching pattern and in situ photographs. The specimens were assigned to seven species in three families and four genera, including (1) Antipathes atlantica Gray, 1857, (2) Antipathes furcata Gray, 1857, (3) Stichopathes pourtalesi Brook, 1889, (4) Stichopathes sp...
November 7, 2017: Zootaxa
https://www.readbyqxmd.com/read/29209805/selected-persistent-organic-pollutants-pops-in-water-of-river-niger-occurrence-and-distribution
#10
J P Unyimadu, O Osibanjo, J O Babayemi
This study assessed the levels and distribution of selected persistent organic pollutants (POPs) in water of River Niger. The selected POPs of interest were organochlorine pesticides (OCPs). Fifteen representative sites along River Niger: three each from Gurara River (tributary) in Niger State, Lokoja (confluence) in Kogi State, Onitsha in Anambra State, Brass and Nicolas Rivers (tributaries) in Bayelsa State were selected for sampling quarterly over a 24-month period. A total of 240 surface and bottom water samples were collected using Van Dorn water sampler in the eight quarters of 2008-2009...
December 6, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29197851/deadly-combination-clostridium-septicum-and-colorectal-malignancy
#11
Carolyn Cullinane, Helen Earley, Shona Tormey
Gas gangrene is a life-threatening, necrotising soft tissue infection. Colorectal malignancy-associated Clostridiumsepticum is a rare cause of gas gangrene. This case outlines an initial presentation of colonic malignancy as gas gangrene from C.septicum infection.A 69-year-old man presented with abdominal pain, vomiting and constipation. Abdominal X-ray revealed dilated small bowel loops. Lactate was elevated. A diagnosis of small bowel obstruction was made. Subsequent CT revealed caecal thickening and subcutaneous emphysema overlying the left flank...
December 2, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29192578/-nitrous-oxide-induced-polyneuropathy
#12
S H P Conjaerts, J E Bruijnes, K Beerhorst, R Beekman
Nitrous oxide, laughing gas, is used as a party drug to achieve a euphoric effect. It has been gaining popularity in recent years and is considered a relatively innocent substance. Nitrous oxide is known to cause subacute degeneration of the spinal cord by inactivation of active vitamin B12. Vitamin B12 plays an essential role in the synthesis of myelin. Hence, vitamin B12 deficiency can lead to degeneration of the dorsal and lateral columns of the spinal cord. Polyneuropathy is a less known complication. We present a 17-year-old woman and a 19-year-old man with subacute axonal polyneuropathy caused by laughing gas abuse...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/29179775/fusobacterium-emphysematous-pyomyositis-with-necrotizing-fasciitis-of-the-leg-presenting-as-compartment-syndrome-a-case-report
#13
Eduardo Smith-Singares, Joseph Adjei Boachie, Izaskun M Iglesias, Leland Jaffe, Adam Goldkind, Eric I Jeng
BACKGROUND: Fusobacterium necrophorum is a common agent of disease in humans, but the occurrence of primary infections outside the head and neck area is extremely rare. While infection with Fusobacterium necrophorum has a rather benign course above the thorax, the organism is capable of producing very severe disease when located in unusual sites, including various forms of septic thrombophlebitis. No infections of the leg have been documented before; thus, antibiotic coverage for Fusobacterium is currently not recommended in this area...
November 28, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29176687/avoidance-of-seismic-survey-activities-by-penguins
#14
Lorien Pichegru, Reason Nyengera, Alistair M McInnes, Pierre Pistorius
Seismic surveys in search for oil or gas under the seabed, produce the most intense man-made ocean noise with known impacts on invertebrates, fish and marine mammals. No evidence to date exists, however, about potential impacts on seabirds. Penguins may be expected to be particularly affected by loud underwater sounds, due to their largely aquatic existence. This study investigated the behavioural response of breeding endangered African Penguins Spheniscus demersus to seismic surveys within 100 km of their colony in South Africa, using a multi-year GPS tracking dataset...
November 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29175087/iso-risk-air-no-decompression-limits-after-scoring-marginal-decompression-sickness-cases-as-non-events
#15
F Gregory Murphy, Ashleigh J Swingler, Wayne A Gerth, Laurens E Howle
Decompression sickness (DCS) in humans is associated with reductions in ambient pressure that occur during diving, aviation, or certain manned spaceflight operations. Its signs and symptoms can include, but are not limited to, joint pain, radiating abdominal pain, paresthesia, dyspnea, general malaise, cognitive dysfunction, cardiopulmonary dysfunction, and death. Probabilistic models of DCS allow the probability of DCS incidence and time of occurrence during or after a given hyperbaric or hypobaric exposure to be predicted based on how the gas contents or gas bubble volumes vary in hypothetical tissue compartments during the exposure...
November 15, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29162990/a-microbubble-of-gas-as-an-early-indication-of-macular-hole-formation-after-vitrectomy-surgery-for-retinal-detachment-repair
#16
Alexander Melamud, Dionysios Koroulakis, Ferdinand Rodriguez-Agramonte
We present a novel case of a 67-year-old man who developed a full-thickness macular hole in the presence of a microbubble after repair of rhegmatogenous retinal detachment.
2017: Digital Journal of Ophthalmology: DJO
https://www.readbyqxmd.com/read/29150508/community-composition-and-ultrastructure-of-a-nitrate-dependent-anaerobic-methane-oxidizing-enrichment-culture
#17
Lavinia Gambelli, Simon Guerrero-Cruz, Rob J Mesman, Geert Cremers, Mike S M Jetten, Huub J M Op den Camp, Boran Kartal, Claudia Lueke, Laura van Niftrik
Methane is a very potent greenhouse gas and can be oxidized aerobically or anaerobically through microbial-mediated processes, thus decreasing methane emissions to the atmosphere. Using a complementary array of methods including phylogenetic analysis, physiological experiments, and light and electron microscopy techniques (including electron tomography), we investigated the community composition and ultrastructure of a continuous bioreactor enrichment culture, in which anaerobic methane oxidation (AOM) was coupled to nitrate reduction...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29145325/perforated-appendicitis-after-colonoscopy-cause-or-coincidence-a-rare-case-report-and-literature-review
#18
Xiao-Cong Zhou, Chun-Wei Huang, Yan-Yan Dai, Zhi-Yang Huang, Zheng Lou
RATIONALE: Colonoscopy is a relatively safe and common procedure with low risks of complications, and acute appendicitis with perforation is an extremely rare complication of colonoscopy. The current study presents an unusual case of acute gangrenous appendicitis with perforation following a screening colonoscopy. PATIENT CONCERNS: A 73-year-old man presented to our emergency department with lower right abdominal pain 3 days after a routine screening colonoscopy...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29144430/a-correlation-study-of-dha-intake-estimated-by-a-ffq-and-concentrations-in-plasma-and-erythrocytes-in-mid-and-late-pregnancy
#19
Yu-Bo Zhou, Hong-Tian Li, Leonardo Trasande, Lin-Lin Wang, Ya-Li Zhang, Ke-Yi Si, Man-Xi Bai, Jian-Meng Liu
Adequate docosahexaenoic acid (DHA) is essential for the optimal growth and development of the fetus. Maternal DHA content fluctuates during pregnancy. The correlation of DHA content with dietary intake might be varied over the course of pregnancy. We aimed to compare the dietary DHA intake, estimated by a DHA-specific semiquantitative food frequency questionnaire (FFQ) against its blood content, among mid- and late-term pregnant women. A total of 804 Chinese pregnant women completed the tailored FFQ and provided fasting venous blood samples...
November 16, 2017: Nutrients
https://www.readbyqxmd.com/read/29138066/modification-of-membrane-properties-and-fatty-acids-biosynthesis-related-genes-in-escherichia-coli-and-staphylococcus-aureus-implications-for-the-antibacterial-mechanism-of-naringenin
#20
Lang-Hong Wang, Xin-An Zeng, Man-Sheng Wang, Charles S Brennan, Deming Gong
In this work, modifications of cell membrane fluidity, fatty acid composition and fatty acid biosynthesis-associated genes of Escherichia coli ATCC 25922 (E. coli) and Staphylococcus aureus ATCC 6538 (S. aureus), during growth in the presence of naringenin (NAR), one of the natural antibacterial components in citrus plants, was investigated. Compared to Escherichia coli, the growth of Staphylococcus aureus was significantly inhibited by NAR in low concentrations. Combination of gas chromatography-mass spectrometry with fluorescence polarization analysis revealed that E...
November 11, 2017: Biochimica et Biophysica Acta
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