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https://www.readbyqxmd.com/read/28088143/fokker-planck-quantum-master-equation-for-mixed-quantum-semiclassical-dynamics
#1
Jin-Jin Ding, Yao Wang, Hou-Dao Zhang, Rui-Xue Xu, Xiao Zheng, YiJing Yan
We revisit Caldeira-Leggett's quantum master equation representing mixed quantum-classical theory, but with limited applications. Proposed is a Fokker-Planck quantum master equation theory, with a generic bi-exponential correlation function description on semiclassical Brownian oscillators' environments. The new theory has caustic terms that bridge between the quantum description on primary systems and the semiclassical or quasi-classical description on environments. Various parametrization schemes, both analytical and numerical, for the generic bi-exponential environment bath correlation functions are proposed and scrutinized...
January 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28074704/the-toxicology-of-zinc-chloride-smoke-producing-bombs-and-screens
#2
Ayman El Idrissi, Lisanne van Berkel, Nadia E Bonekamp, Diana J Z Dalemans, Marcel A G van der Heyden
CONTEXT: Zinc chloride (ZnCl2)-based smoke bombs and screens are in use since the Second World War (1939-1945). Many case descriptions on ZnCl2 smoke inhalation incidents appeared since 1945. OBJECTIVE: We provide a comprehensive overview of the clinical symptoms and underlying pathophysiology due to exposure to fumes from ZnCl2 smoke producing bombs. In addition, we give a historical overview of treatment regimens and their outcomes. METHODOLOGY: We performed a literature search on Medline, Scopus and Google Scholar databases using combinations of the following search terms "smoke bomb", "smoke screen", "ZnCl2", "intoxication", "poisoning", "case report", "HE smoke", "hexachloroethane smoke", "smoke inhalation" and "white smoke"...
January 11, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28066602/a-novel-surgical-method-for-acquired-non-malignant-complicated-tracheoesophageal-and-bronchial-gastric-stump-fistula-the-double-patch-technique
#3
Guang Yang, Wei-Miao Li, Jin-Bo Zhao, Jian Wang, Yun-Feng Ni, Yong-An Zhou, Yong Han, Xiao-Fei Li, Xiao-Long Yan
BACKGROUND: To manage the acquired benign complicated tracheoesophageal fistula (TEF) and bronchial-gastric stump fistula (BGSF) are clinical technical challenge. The purpose of this study is to retrospectively review a surgical "double patch" technique in treating nonmalignant complicated TEF and BGSF, and then clarify the long-term curative effect of the technique. METHODS: Clinical records of 30 patients with non-malignant complicated TEF and BGSF treated by "double patch" technique in Tangdu Hospital between August 2004 and August 2014, were analyzed and summarized retrospectively...
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28063680/gastric-tube-esophagoplasty-for-pediatric-esophageal-replacement
#4
Mahmoud M A Elfiky, Gamal El Tagy, Wissam Mohamed, Osama Abdel Azim, Mohamed A Elfiky
BACKGROUND: Esophageal replacement in children is indicated in cases of esophageal atresia with or without fistula, in case of long gap esophageal atresia or failed primary repair. Intractable post corrosive esophageal stricture is considered also a major indication for replacement. METHODS: This is a cohort retrospective study of esophageal replacement cases by gastric tube carried out at the pediatric surgery department at Cairo University between 2011 and 2015...
December 24, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28045663/caustic-ingestion
#5
REVIEW
Mircea Chirica, Luigi Bonavina, Michael D Kelly, Emile Sarfati, Pierre Cattan
Corrosive ingestion is a rare but potentially devastating event and, despite the availability of effective preventive public health strategies, injuries continue to occur. Most clinicians have limited personal experience and rely on guidelines; however, uncertainty persists about best clinical practice. Ingestions range from mild cases with no injury to severe cases with full thickness necrosis of the oesophagus and stomach. CT scan is superior to traditional endoscopy for stratification of patients to emergency resection or observation...
October 26, 2016: Lancet
https://www.readbyqxmd.com/read/28032947/controversies-in-the-management-of-caustic-ingestion-injury-an-evidence-based-review
#6
J H Bird, S Kumar, C Paul, J D Ramsden
BACKGROUND: Caustic ingestion of acid or alkaline substances can cause damage to the upper respiratory and upper digestive tract. Initial presentation following caustic ingestion can include oropharyngeal pain, dysphagia and stridor. Due to this clinical presentation that the resident otolaryngologist is consulted to review and examine these patients to assess for airway compromise and commence initial management and care until airway concern has passed. OBJECTIVE OF REVIEW: This review aims to provide evidence based guidance in the management of those presenting with acute ingestion injury so that informed initial medical therapy can be commenced and appropriate investigations arranged to optimise patient outcome...
December 29, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27997142/thiosulfate-conversion-to-sulfide-by-a-haloalkaliphilic-microbial-community-in-a-bioreactor-fed-with-h2-gas
#7
João A B Sousa, Martijn F M Bijmans, Alfons J M Stams, Caroline M Plugge
In industrial gas biodesulfurization systems, where haloalkaline conditions prevail, a thiosulfate containing bleed stream is produced. This bleed stream can be treated in a separate bioreactor by reducing thiosulfate to sulfide and recycling it. By performing treatment and recycling of the bleed stream, its disposal decreases and less caustics are required to maintain the high pH. In this study, anaerobic microbial thiosulfate conversion to sulfide in a H2/CO2 fed bioreactor operated at haloalkaline conditions was investigated...
January 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/27988404/bauxite-residue-neutralization-with-simultaneous-mineral-carbonation-using-atmospheric-co2
#8
Young-Soo Han, Sangwoo Ji, Pyeong-Koo Lee, Chamteut Oh
Simultaneous carbon mineralization during neutralization of bauxite residue, a caustic alkaline by-product of alumina refining, was tested using laboratory batch and a field pilot study in contact with atmospheric CO2. Since CO2 sequestration is limited by the Ca concentration in the bauxite residue, extra Ca sources were added in a semi-soluble mineral and salt form (flue gas desulfurization gypsum or CaCl2) to verify whether this Ca addition accelerated and enlarged the CO2 sequestration obtained as a consequence of neutralization...
December 12, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27987121/further-understanding-on-the-mechanism-of-alkyl-ketene-dimer-sizing-on-the-causticized-calcium-carbonate-filled-paper-and-its-improvements
#9
Jian Wang, Miao Dang, Chao Duan, Li Qian
Causticized calcium carbonate (CCC), a solid waste derived from kraft black recovery process, can be used as an alternative for the conventional precipitated calcium carbonate (PCC). However, the application of the CCC has been limited due to its low sizing efficiency in its filled paper. In this study, the characteristics of the CCC were studied aiming to improve the alkyl ketene dimer (AKD) sizing performances of the CCC filled papers, and the results were compared with those from PCC filled papers. The results showed that the CCC had higher pore structure, higher specific surface area, and more negative charge density than the PCC, thus leading to a higher cationic AKD adsorption onto the CCC filler...
December 16, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27979610/salivary-bypass-tube-placement-in-esophageal-stricture-a-technical-note-and-report-of-three-cases
#10
Giancarlo Tirelli, Roberto Baruca, Francesca Boscolo Nata
Hypopharyngeal and cervical esophageal strictures can be caused by advanced malignancies, ingestion of caustic materials, or can follow surgery or radiation therapy. They cause marked dysphagia and consequently patients need nasogastric or gastrostomy tube feeding, with a remarkable impact on quality of life. To restore oral feeding, the stenosis can be progressively dilated by using rubber bougies of increasing diameter, and a Montgomery(®) Salivary Bypass Tube can then be inserted to maintain the obtained calibre...
December 12, 2016: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/27943305/use-of-skin-lightening-products-among-selected-urban-communities-in-accra-ghana
#11
Margaret Lartey, Francis D Krampa, Mubarak Abdul-Rahman, Naa L Quarcoo, Phaedra Yamson, Paa G Hagan, Yao Tettey, Richard Gyasi, Andrew A Adjei
BACKGROUND: The practice of skin lightening has been reported from North America, Europe, Asia, and Africa. In literature, some prevalence rates exceed 50%, and both sexes are involved. Common agents used include hydroquinone, mercury, corticosteroids, and caustic agents. The agents are easily accessible and affordable with very little regulation. Cutaneous and systemic side effects occur but do not appear to be a deterrent, as the notion of light skin as a surrogate for beauty is strong...
January 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/27938784/surveillance-of-patients-at-high-risk-of-squamous-cell-esophageal-cancer
#12
REVIEW
A Chaber-Ciopinska, D Kiprian, A Kawecki, M F Kaminski
Currently curative treatment for esophageal squamous cell cancer (ESCC) is possible only in patients with early-stage, usually asymptomatic disease. In Western countries, where the incidence of ESCC is relatively low, a screening of asymptomatic, average-risk population is untenable. In order to detect early-stage ESCC or its precursor lesions it is important to identify high-risk patients and consider endoscopic surveillance in these groups. These high-risk groups include patients after curative treatment for head and neck cancer, previous endoscopic resection of ESCC, caustic injury, and patients with tylosis or achalasia...
December 2016: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/27931108/caustic-esophageal-injury-by-impaction-of-cell-batteries
#13
Francisco José García Fernández, Rafael León Montañés, Juan Manuel Bozada Garcia
The ingestion of cell batteries can cause serious complications (fistula, perforation or stenosis) at the esophageal level. The damage starts soon after ingestion (approximately 2 hours) and is directly related to the amount of time the battery is lodged in said location, the amount of electrical charge remaining in the battery, and the size of the battery itself. Injury is produced by the combination of electrochemical and chemical mechanisms and pressure necrosis. The ingestion of multiple cells and a size > = 20 mm are related with more severe and clinically significant outcomes...
December 2016: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/27928446/gastrostomy-with-peritoneal-collar-versus-percutaneous-endoscopic-gastrostomy
#14
Tudor C, Branescu C, Savlovschi C, El-Khatib A, Pantu H, Nica A, Dascalu Am, Masoumeh B, Tudor As, Oprescu Sm, Serban D
Aim. The present study aimed to perform a medico-surgical comparative analysis of the 2 most widely used techniques: gastrostomy with peritoneal collar versus percutaneous endoscopic gastrostomy, based on the vast clinical experience in an Upper Digestive Surgery Clinic. Materials and method. A retrospective study was carried out between January 2010 and January 2015 on the patients admitted for a surgical solution for feeding. The indications, preoperative preparation, surgical techniques, and postoperative outcomes were analyzed...
October 2016: Journal of Medicine and Life
https://www.readbyqxmd.com/read/27911065/-gastric-tube-esophagoplasty-using-the-retroesternal-route-in-children
#15
L García Martínez, J A Molino Gahete, S Redecillas Ferreiro, E Bordón Cabrera, J Bueno Recio, G Guillén Burrieza, C Giné Prades, A Lara Valtueña, J Lloret Roca
INTRODUCTION: Esophageal replacement is a surgical alternative once native esophagus can't be preserved. Different organs and routes for the replacement have been described, being the retroesternal route the least used. The aim is to present our results using gastric tube esophagoplasty with a retroesternal approach. PATIENTS AND METHODS: We performed a retrospective and descriptive study of 11 patients operated from 2000 to 2015. Median age at surgery was 2.2 years (5 months-9 years) and median weight was 11...
January 25, 2016: Cirugía Pediátrica: Organo Oficial de la Sociedad Española de Cirugía Pediátrica
https://www.readbyqxmd.com/read/27908051/internal-tides-and-deep-diel-fades-in-acoustic-intensity
#16
Andrew W White, Frank S Henyey, Rex K Andrew, James A Mercer, Peter F Worcester, Matthew A Dzieciuch, John A Colosi
A mechanism is presented by which the observed acoustic intensity is made to vary due to changes in the acoustic path that are caused by internal-tide vertical fluid displacements. The position in range and depth of large-scale caustic structure is determined by the background sound-speed profile. Internal tides cause a deformation of the background profile, changing the positions of the caustic structures-which can introduce intensity changes at a distant receiver. Gradual fades in the acoustic intensity occurring over timescales similar to those of the tides were measured during a low-frequency (284-Hz) acoustic scattering experiment in the Philippine Sea in 2009 [White et al...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27872426/gastric-tube-esophageal-reconstruction-in-children-with-esophageal-atresia-and-caustic-stricture-study-of-clinical-value-based-on-25-years-single-centre-experience
#17
Maja Milickovic, Djordje Savic, Blagoje Grujic, Aleksandar Vlahovic, Miroslav Vukadin, Mila Stajevic, Vladimir Kojovic
AIM: The aim of this study was estimation of clinical value of gastric tube esophagoplasty in children based on one single center experience. METHODS: Forty - nine patients with diagnosis of EA (n=22) and caustic esophageal injury (n=27) had undergone reverse gastric tube esophagoplasty during 25 years at our institution. Almost all EA patients received initially gastrostomy and cervical esophagostomy. Majority of CS patients had initially repeated dilatation therapy...
November 21, 2016: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/27859311/basic-mechanism-of-button-battery-ingestion-injuries-and-novel-mitigation-strategies-after-diagnosis-and-removal
#18
Kris R Jatana, Keith Rhoades, Scott Milkovich, Ian N Jacobs
OBJECTIVES/HYPOTHESIS: Button battery (BB) injuries continue to be a significant source of morbidity and mortality, and there is a need to confirm the mechanism of injury for development of additional mitigation strategies. STUDY DESIGN: Cadaveric piglet esophageal model. METHODS: Lithium, silver oxide, alkaline, and zinc-air BBs were placed in thawed sections of cadaveric piglet esophagus, bathed in normal saline. Severity of gross visual burn, pH, and temperature were recorded every 30 minutes for 6 hours...
November 9, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27858433/spin-wave-power-flow-and-caustics-in-ultrathin-ferromagnets-with-the-dzyaloshinskii-moriya-interaction
#19
Joo-Von Kim, Robert L Stamps, Robert E Camley
The Dzyaloshinskii-Moriya interaction in ultrathin ferromagnets can result in nonreciprocal propagation of spin waves. We examine theoretically how spin wave power flow is influenced by this interaction. We show that the combination of the dipole-dipole and Dzyaloshinskii-Moriya interactions can result in unidirectional caustic beams in the Damon-Eshbach geometry. Morever, self-generated interface patterns can also be induced from a point-source excitation.
November 4, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27853393/acute-abdomen-as-a-consequence-of-an-unusual-suicide-attempt-intra-abdominal-injection-of-sulfuric-acid
#20
Anna Lepore, Davide D'Antini, Pasquale Raimondo, Lucia Mirabella, Leonardo Pennisi, Giuseppe Carrillo, Antonella Cotoia, Michele Dambrosio, Gilda Cinnella
Caustic ingestion is a common cause of life-threatening upper gastrointestinal tract injuries. It mostly happens in children as accidental exposure, but may occur in adults as a result of suicide attempt. We present a case of an acute abdomen that occurred after a peculiar way of self-administration of sulfuric acid as a suicide attempt in an adult psychiatric male patient, already known for self-harm with caustic agents in the previous years. In a few hours, the patient developed diffuse peritonitis, pneumoperitoneum, and a rapid hemodynamic deterioration, as a consequence of ileum and sigmoid necrosis, requiring an emergency surgery with the application of a damage control strategy...
2016: International Medical Case Reports Journal
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