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https://www.readbyqxmd.com/read/29782932/resin-flow-in-conifers
#1
Paulo Cabrita
Resins are plant exudates of economic importance used by plants as defence. They flow out of resin ducts, open and long tube-like intercellular spaces lined by a layer of specialized parenchyma cells, called the epithelium, which secrete resin into the duct lumen. A model that describes resin flow in conifers is presented to investigate how duct structure, resin loading, crystallization, and viscosity affect flow and could explain differences between species. Considering resin viscosity, the structure of resin ducts, and a pressure-driven resin loading through the duct wall, the unsteady Stokes equation was applied...
May 18, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29782702/unique-tube-ring-interactions-complexation-of-single-walled-carbon-nanotubes-with-cycloparaphenyleneacetylenes
#2
Koji Miki, Kenzo Saiki, Tomokazu Umeyama, Jinseok Baek, Takeru Noda, Hiroshi Imahori, Yuta Sato, Kazu Suenaga, Kouichi Ohe
Carbon nanotubes (CNTs) interlocked by cyclic compounds through supramolecular interaction are promising rotaxane-like materials applicable as 2D and 3D networks of nanowires and disease-specific theranostic agents having multifunctionalities. Supramolecular complexation of CNTs with cyclic compounds in a "ring toss'' manner is a straightforward method to prepare interlocked CNTs; however, to date, this has not been reported on. Here, the "ring toss" method to prepare interlocked CNTs by using π-conjugated carbon nanorings: [8]-, [9]-, and [10]cycloparaphenyleneacetylene (CPPA) is reported...
May 21, 2018: Small
https://www.readbyqxmd.com/read/29782482/trauma-patients-are-safe-to-fly-72-hours-after-tube-thoracostomy-removal
#3
David Zonies, Joel Elterman, Christopher Burns, Vincent Paul, John Oh, Jeremy Cannon
BACKGROUND: Current recommendations for safe air travel following traumatic pneumothorax are 2-3 weeks after radiographic resolution. These recommendations are based on several small observational studies and expert consensus which cite a theoretical risk of recurrence and hypoxia due to decreased oxygen tension at altitude. We sought to systematically study the timing of chest drain removal after traumatic pneumothorax and risk of recurrence in relation to air travel. METHODS: A retrospective cohort study of consecutively admitted patients who sustained a traumatic chest injury treated with tube thoracostomy over a 5-year period was undertaken...
May 18, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29782417/prevalence-and-analysis-of-medical-device-related-pressure-injuries-results-from-the-international-pressure-ulcer-prevalence-survey
#4
Susan A Kayser, Catherine A VanGilder, Elizabeth A Ayello, Charlie Lachenbruch
OBJECTIVE: To examine the prevalence and characteristics of medical device-related pressure injuries (MDR PIs) in a large, generalizable database. METHODS: This study is a retrospective analysis of the 2016 International Pressure Ulcer Prevalence data. Data were limited to US and Canadian facilities. Facilities included acute care, long-term care, rehabilitation, long-term acute care hospitals, and hospice. Analysis included 102,865 adult patients; 99,876 had complete data and were the focus of the analysis and are reported in the results below...
June 2018: Advances in Skin & Wound Care
https://www.readbyqxmd.com/read/29782365/utilization-of-an-alternative-docetaxel-based-intraperitoneal-chemotherapy-regimen-in-patients-with-ovarian-fallopian-tube-or-primary-peritoneal-carcinoma-a-continued-need-for-ovarian-cancer-patients
#5
David A Becker, Charles A Leath, Christen L Walters-Haygood, Brentley Q Smith, Kerri S Bevis
OBJECTIVE: The objective of this study was to report the tolerability and toxicity of a regimen consisting of intravenous (IV) docetaxel and intraperitoneal (IP) cisplatin and paclitaxel with granulocyte colony-stimulating factor support. MATERIALS AND METHODS: We conducted a retrospective cohort study of patients with surgical stage II-IV epithelial ovarian, fallopian tube or primary peritoneal carcinoma treated with an outpatient IP chemotherapy regimen consisting of docetaxel 75 mg/m IV and cisplatin 75 mg/m IP day 1 followed by paclitaxel 60 mg/m IP day 8 every 21 days...
May 18, 2018: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29782340/fatal-airway-obstruction-in-a-man-with-a-cystic-hygroma
#6
Cassandra Maria Wygant, Stephen D Cohle
We describe a 24-year-old man with a cystic hygroma of the left side of the lower neck that led to sudden death. Cystic hygroma (cystic lymphangioma) is a congenital malformation of the lymphatic system. The patient, who had a tracheostomy because of airway obstruction from the cystic hygroma, was found dead with his tracheostomy tube on the floor next to him. Complications of cystic hygroma include infiltration of the neck causing airway obstruction, dysphagia, pain, and obstructive sleep apnea.
May 3, 2018: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/29782005/the-diffusion-of-passive-tracers-in-laminar-shear-flow
#7
Manuchehr Aminian, Francesca Bernardi, Roberto Camassa, Daniel M Harris, Richard M McLaughlin
A simple method to experimentally observe and measure the dispersion of a passive tracer in a laminar fluid flow is described. The method consists of first injecting fluorescent dye directly into a pipe filled with distilled water and allowing it to diffuse across the cross-section of the pipe to obtain a uniformly distributed initial condition. Following this period, the laminar flow is activated with a programmable syringe pump to observe the competition of advection and diffusion of the tracer through the pipe...
May 1, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29781925/osteo-odonto-keratoprosthesis-in-severe-thermal-and-chemical-injuries
#8
Alfonso Vasquez-Perez, Mehran Zarei-Ghanavati, Venkata Avadhanam, Christopher Liu
PURPOSE: To report the results of osteo-odonto-keratoprosthesis (OOKP) surgery in patients who sustained severe chemical and thermal injuries. METHODS: This is a noncomparative retrospective case series of 14 patients who underwent OOKP surgery between 2001 and 2016 at the Sussex Eye Hospital, Brighton, UK, because of severe chemical and thermal injuries RESULTS:: OOKP surgery was performed in 14 eyes of 14 patients. Eight patients (57%) sustained thermal injuries and 6 patients (43%) chemical injuries...
May 16, 2018: Cornea
https://www.readbyqxmd.com/read/29781859/nonoperating-room-anesthesia-for-gastrointestinal-endoscopic-procedures
#9
Otto S Lin, Wade Weigel
PURPOSE OF REVIEW: To assess the trends in nonoperating room anesthesia (NORA) for gastrointestinal endoscopy over the past few years, and to describe alternative methods of delivering propofol sedation in selected low-risk patients. RECENT FINDINGS: The use of NORA for routine gastrointestinal endoscopic procedures has been rising steadily over the past decade in the United States, considerably increasing healthcare costs. Because of this, there have been attempts to develop nonanesthesiologist-administered propofol sedation methods in low-risk patients...
May 16, 2018: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/29781599/fused-silica-micro-capillaries-used-for-a-simple-miniaturization-of-the-electrified-liquid-liquid-interface
#10
Konrad Rudnicki, Lukasz Poltorak, Sławomira Skrzypek, Ernst J R Sudholter
Short pieces of fused silica capillary tubing were used to support an electrified liquid - liquid interface. A methyl deactivated silica capillary having a diameter of 25 µm was filled with 1,2-dichloroethane solution and served as the organic part of the liquid - liquid interface. A non-deactivated fused silica capillary having a diameter of 5, 10 or 25 µm were filled with an aqueous HCl solution and served as the aqueous part of the electrochemical cell. For the latter, silanization of the capillary interior with chlorotrimethylsilane allowed for a successful phase reversal...
May 21, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29781330/management-of-pleural-infections
#11
Lucía Ferreiro, José M Porcel, Silvia Bielsa, María Elena Toubes, José Manuel Álvarez-Dobaño, Luis Valdés
The management of infected pleural effusion is complex. Therapeutic resolution requires determining the following: appropriate antibiotic regimen, the need for pleural drainage, the optimal drainage tube size, and the need for intrapleural therapy or surgery. Areas covered: An updating of the latest advances in the management of parapneumonic pleural effusion based on the best evidence available is provided. Expert commentary: The correct management of parapneumonic pleural effusion is based on selecting an antibiotic regimen according to the origin of the pleural infection (community-acquired or nosocomial)...
May 20, 2018: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/29780715/endovascular-treatment-of-acute-type-a-aortic-dissection-the-endo-bentall-approach
#12
Maximilian Kreibich, Bartosz Rylski, Stoyan Kondov, Julia Morlock, Johannes Scheumann, Fabian A Kari, Holger Schröfel, Matthias Siepe, Friedhelm Beyersdorf, Martin Czerny
Outcome after classical surgical repair of acute Type A aortic dissection has steadily improved over the years and several modifications in cannulation and perfusion added to this achievement. However, subgroups remain where results of classical surgical repair still have room for improvement, particularly patients with severe preoperative malperfusion as well as elderly patients with a limited physiological reserve. So far, only small case series or case reports have been published on the endovascular treatment of dissected ascending aortas...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29780548/reversible-dispersion-and-release-of-carbon-nanotubes-via-cooperative-clamping-interactions-with-hydrogen-bonded-nanorings
#13
Raquel Chamorro, Leire de Juan-Fernández, Belén Nieto-Ortega, Maria J Mayoral, Santiago Casado, Luisa Ruiz-González, Emilio M Pérez, David González-Rodríguez
Due to their outstanding electronic and mechanical properties, single-walled carbon nanotubes (SWCNTs) are promising nanomaterials for the future generation of optoelectronic devices and composites. However, their scarce solubility limits their application in many technologies that demand solution-processing of high-purity SWCNT samples. Although some non-covalent functionalization approaches have demonstrated their utility in extracting SWCNTs into different media, many of them produce short-lived dispersions or ultimately suffer from contamination by the dispersing agent...
May 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780513/simulations-of-the-synthesis-of-boron-nitride-nanostructures-in-a-hot-high-pressure-gas-volume
#14
Predrag S Krstic, Longtao Han, Stephan Irle, Hiromi Nakai
We performed nanosecond timescale computer simulations of clusterization and agglomeration processes of boron nitride (BN) nanostructures in hot, high pressure gas, starting from eleven different atomic and molecular precursor systems containing boron, nitrogen and hydrogen at various temperatures from 1500 to 6000 K. The synthesized BN nanostructures self-assemble in the form of cages, flakes, and tubes as well as amorphous structures. The simulations facilitate the analysis of chemical dynamics and we are able to predict the optimal conditions concerning temperature and chemical precursor composition for controlling the synthesis process in a high temperature gas volume, at high pressure...
April 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780463/simultaneous-multiple-single-nucleotide-polymorphism-detection-based-on-click-chemistry-combined-with-dna-encoded-probes
#15
Qian-Yu Zhou, Fang Yuan, Xiao-Hui Zhang, Ying-Lin Zhou, Xin-Xiang Zhang
Single nucleotide polymorphisms (SNPs) are emerging as important biomarkers for disease diagnosis, prognostics and disease pathogenesis. As one type of disease is always connected to several SNP sites, there is great demand for a reliable multiple SNP detection method. Herein, we mimicked a ligation reaction based on DNA ligase and originally utilized an enzyme-free DNA template-directed click reaction for SNP detection. With 5'-alkyne and 3'-azide groups labelled on two oligonucleotide probes, the target DNA-directed Cu(i)-catalyzed alkyne-azide cycloaddition (CuAAC) click reaction produced a new DNA strand with a triazole backbone, as a mimic of a DNA phosphodiester linkage...
April 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29779999/peer-assisted-learning-model-enhances-clinical-clerk-s-procedural-skills
#16
Chia-Chang Huang, Hui-Chi Hsu, Ling-Yu Yang, Chen-Huan Chen, Ying-Ying Yang, Ching-Chih Chang, Chiao-Lin Chuang, Wei-Shin Lee, Fa-Yauh Lee, Shinn-Jang Hwang
BACKGROUND: Failure to transfer procedural skills learned in a laboratory to the bedside is commonly due to a lack of peer support/stimulation. A digital platform (Facebook) allows new clinical clerks to share experiences and tips that help augment their procedural skills in a peer-assisted learning/teaching method. This study aims to investigate the effectiveness of the innovation of using the digital platform to support the transfer of laboratory-trained procedural skills in the clinical units...
May 17, 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29779822/associations-of-hyperosmolar-medications-administered-via-nasogastric-or-nasoduodenal-tubes-and-feeding-adequacy-food-intolerance-and-gastrointestinal-complications-amongst-critically-ill-patients-a-retrospective-study
#17
Evertine Wesselink, Kristine W A C Koekkoek, Martijn Looijen, Dick A van Blokland, Renger F Witkamp, Arthur R H van Zanten
BACKGROUND: Adequate nutrition is essential during critical illness. However, providing adequate nutrition is often hindered by gastro-intestinal complications, including feeding intolerance. It is suggested that hyperosmolar medications could be causally involved in the development of gastro-intestinal complications. The aims of the present study were 1) to determine the osmolality of common enterally administered dissolved medications and 2) to study the associations between nasogastric and nasoduodenal administered hyperosmolar medications and nutritional adequacy as well as food intolerance and gastro-intestinal symptoms...
June 2018: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29779769/seasonal-variation-in-the-performance-of-quantiferon-tb-gold-in-tube-assays-used-for-the-diagnosis-of-tuberculosis-infection
#18
Marc Tebruegge, Nigel Curtis, Vanessa Clifford, Cristina Fernandez-Turienzo, Nigel Klein, Katy Fidler, Salah Mansour, Paul Elkington, Stephen Morris-Jones
This study aimed to determine whether there are seasonal changes in the performance of QuantiFERON-TB Gold In-Tube (QFT-GIT) assays, an interferon-gamma release assay widely used for the diagnosis of tuberculosis infection. Results of 31,932 QFT-GIT assays performed at a large independent, accredited diagnostic service provider in London, UK over a 4.5-year-period were analysed. The proportion of positive results was significantly lower in autumn (14.8%) than in spring (16.0%; p = 0.0366) and summer (17...
May 2018: Tuberculosis
https://www.readbyqxmd.com/read/29779486/risk-factors-for-prolonged-postoperative-ileus-in-adult-patients-undergoing-elective-colorectal-surgery-an-observational-cohort-study
#19
Andrea Pisani Ceretti, Nirvana Maroni, Marco Longhi, Marco Giovenzana, Roberto Santambrogio, Matteo Barabino, Carmelo Luigiano, Giovanni Radaelli, Enrico Opocher
Purpose Prolonged postoperative ileus (PPOI) after abdominal surgery may effect unfavourably the patient recovery. The aim of this study was to estimate the incidence of PPOI in patients elective for colorectal resection and investigate perioperative variables associated with PPOI. Methods A consecutive series of 428 patients undergoing colorectal resection (median age 72, range 24-92, years; men/women ratio 1.14) were analyzed. Data were extracted retrospectively throughout a five-year period from an electronic prospectively maintained database...
May 20, 2018: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/29779316/-the-necessity-of-artificial-kidney-seeper-in-the-ultrasonography-guided-percutaneous-nephrolithotomy-a-randomized-controlled-study
#20
J J Ye, Y Yang, H J Zhang, Y C Zheng, Y Pan, H Xie
Objective: To investigate the necessity of artificial kidney seeper which made through inserting a ureteral tube in the ureter to the ultrasonography-guided percutaneous nephrolithotomy (PCNL). Methods: This was a randomized prospective study. Patients who conformed to the inclusion and exclusion criteria were enrolled at Department of Urology, Frist Affiliated Hospital of Wenzhou Medical University from January 2016 to May 2017. Totally 291 patients were included in the study. Patients were randomly assigned into two groups (artificial kidney seeper group and non-artificial kidney seeper group) in different kidney seeper level (5 to <10 mm, 10 to 20 mm) respectively...
May 1, 2018: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
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