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https://www.readbyqxmd.com/read/29758698/from-quantum-to-classical-modeling-of-radiation-reaction-a-focus-on-stochasticity-effects
#1
F Niel, C Riconda, F Amiranoff, R Duclous, M Grech
Radiation reaction in the interaction of ultrarelativistic electrons with a strong external electromagnetic field is investigated using a kinetic approach in the nonlinear moderately quantum regime. Three complementary descriptions are discussed considering arbitrary geometries of interaction: a deterministic one relying on the quantum-corrected radiation reaction force in the Landau and Lifschitz (LL) form, a linear Boltzmann equation for the electron distribution function, and a Fokker-Planck (FP) expansion in the limit where the emitted photon energies are small with respect to that of the emitting electrons...
April 2018: Physical Review. E
https://www.readbyqxmd.com/read/29644909/advanced-ercp-techniques-for-the-extraction-of-complex-biliary-stones-a-single-referral-center-s-12-year-experience
#2
Nicholas G Brown, Joel Camilo, Eric Nordstrom, Roy D Yen, Norio Fukami, Brian C Brauer, Sachin Wani, Stuart K Amateau, Augustin R Attwell, Raj J Shah
OBJECTIVES: Advanced ERCP techniques (AETs) for difficult biliary stones include peroral cholangioscopy (POC) with electrohydraulic/laser lithotripsy (EHL/LL), endoscopic papillary large balloon dilation (EPLBD) and mechanical lithotripsy (ML). We assess the efficacy of AETs. METHODS: A retrospective query for AETs. PRIMARY OUTCOME: Complete duct clearance. Secondary outcome: Complete duct clearance by technique. Statistical Analysis version 9...
April 12, 2018: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/29439267/radiation-exposure-during-ureterorenoscopy-and-laser-lithotripsy-an-analysis-of-stone-characteristics
#3
Marios Hadjipavlou, Vincent Lam, Jai Seth, Faqar Anjum, Seshadri Sriprasad
INTRODUCTION AND OBJECTIVES: Stone formers often have a chronic exposure to significant quantities of ionising radiation from radiological investigations and interventions. Predicting radiation exposure would allow the clinician to quantify expected cumulative radiation and find strategies to minimise exposure. We evaluated radiation exposure during ureteroscopy and laser lithotripsy (URS + LL) for a single stone episode and correlated the results to stone characteristics. METHOD: Data was collected retrospectively for all patients undergoing URS + LL in our institution over a 1 year period...
2018: Urologia Internationalis
https://www.readbyqxmd.com/read/29402703/tibial-nerve-stimulation-to-drive-genital-sexual-arousal-in-an-anesthetized-female-rat
#4
Lauren L Zimmerman, Indie C Rice, Mitchell B Berger, Tim M Bruns
BACKGROUND: There is clinical evidence that percutaneous tibial nerve stimulation can positively benefit women with female sexual interest/arousal disorder, yet no studies have explored the potential mechanisms further. AIM: To investigate the effect of tibial nerve stimulation on vaginal blood perfusion (VBP) in an anesthetized rat model. METHODS: 16 ketamine-anesthetized rats were surgically implanted with a nerve cuff electrode on 1 tibial nerve...
March 2018: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29372443/sensitivity-of-caries-pathogens-to-antimicrobial-peptides-related-to-caries-risk
#5
Julia Eliette Goeke, Stefan Kist, Sören Schubert, Reinhard Hickel, Karin Christine Huth, Maximilian Kollmuss
OBJECTIVES: Antimicrobial peptides (AMPs) represent important facets of the immune system controlling infectious diseases. However, pathogens show varying susceptibilities to AMPs. This study investigates the susceptibilities of strains of Streptococcus mutans (SM), Actinomyces naeslundii (AN), and Lactobacillus spp. (LB) towards AMPs and if there are correlations between the appearance of such high-risk strains and clinical caries status. MATERIAL AND METHODS: Plaque samples were collected from patients along with clinical examinations...
January 25, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29273725/functional-shift-with-maintained-regenerative-potential-following-portal-vein-ligation
#6
Tibor Kovács, Domokos Máthé, András Fülöp, Katalin Jemnitz, Attila Bátai-Konczos, Zsuzsanna Veres, György Török, Dániel Sándor Veres, Ildikó Horváth, Krisztián Szigeti, László Homolya, Attila Szijártó
Selective portal vein ligation (PVL) allows the two-stage surgical resection of primarily unresectable liver tumours by generating the atrophy and hypertrophy of portally ligated (LL) and non-ligated lobes (NLL), respectively. To evaluate critically important underlying functional alterations, present study characterised in vitro and vivo liver function in male Wistar rats (n = 106; 210-250 g) before, and 24/48/72/168/336 h after PVL. Lobe weights and volumes by magnetic resonance imaging confirmed the atrophy-hypertrophy complex...
December 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29022391/kr-12-a5-is-a-non-cytotoxic-agent-with-potent-antimicrobial-effects-against-oral-pathogens
#7
Karina Sampaio Caiaffa, Loiane Massunari, Marcelle Danelon, Gabriel Flores Abuna, Telma Blanca Lombardo Bedran, Norival Alves Santos-Filho, Denise Madalena Palomari Spolidorio, Natalia Leal Vizoto, Eduardo Maffud Cilli, Cristiane Duque
This study evaluated the cytotoxicity and antimicrobial activity of analogs of cationic peptides against microorganisms associated with endodontic infections. L-929 fibroblasts were exposed to LL-37, KR-12-a5 and hBD-3-1CV and chlorhexidine (CHX, control), and cell metabolism was evaluated with MTT. The minimal inhibitory concentration (MIC) and the minimal bactericidal/fungicidal concentration (MBC/MFC) of the peptides and CHX were determined against oral pathogens associated with endodontic infections. Enterococcus faecalis and Streptococcus mutans biofilms were cultivated in bovine dentin blocks, exposed to different concentrations of the most efficient antimicrobial peptide and analyzed by confocal laser scanning microscopy...
November 2017: Biofouling
https://www.readbyqxmd.com/read/28911643/cytotoxic-and-antioxidant-capacity-of-camel-milk-peptides-effects-of-isolated-peptide-on-superoxide-dismutase-and-catalase-gene-expression
#8
Masoud Homayouni-Tabrizi, Ahmad Asoodeh, Mozhgan Soltani
Peptides from natural sources such as milk are shown to have a wide spectrum of biological activities. In this study, three peptides with antioxidant capacity were identified from camel milk protein hydrolysate. Pepsin and pancreatin were used for hydrolysis of milk proteins. Ultrafiltration and reverse-phase high-performance liquid chromatography were used for the concentration and purification of the hydrolysate, respectively. Sequences of the three peptides, which were determined by matrix-assisted laser desorption/ionization time-of-flight spectrophotometry, were LEEQQQTEDEQQDQL [molecular weight (MW): 1860...
July 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28874999/comparison-of-retention-forces-with-various-fabrication-methods-and-materials-in-double-crowns
#9
Melahat Çelik Güven, Meral Tuna, Ergun Bozdağ, Gizem Nur Öztürk, Gulsen Bayraktar
PURPOSE: The purpose of this study was to analyze the retention force changes and wear behaviours of double-crown systems over long-term use. MATERIALS AND METHODS: Ten groups, each consisting of six samples, were evaluated. Specifically, casting gold alloy primary crown - casting gold alloy secondary crown (AA), laser sintering primary crown - laser sintering secondary crown (LL), casting Cr alloy primary crown - casting Cr alloy secondary crown, (CC) zirconia primary crown - electroformed secondary crown (ZA), and CAD/CAM titanium alloy primary crown - CAD/CAM titanium alloy secondary crown (TT) groups were evaluated at cone angles of 4° and 6°...
August 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28759300/par-1-and-par-2-expression-is-enhanced-in-inflamed-odontoblast-cells
#10
M M P Alvarez, G E Moura, M F M Machado, G M Viana, C A de Souza Costa, L Tjäderhane, H B Nader, I L S Tersariol, F D Nascimento
Protease-activated receptors (PARs) are G protein-coupled receptors, which are activated by proteolytical cleavage of the amino-terminus and act as sensors for extracellular proteases. We hypothesized that PAR-1 and PAR-2 can be modulated by inflammatory stimulus in human dental pulp cells. PAR-1 and PAR-2 gene expression in human pulp tissue and MDPC-23 cells were analyzed by quantitative polymerase chain reaction. Monoclonal PAR-1 and PAR-2 antibodies were used to investigate the cellular expression of these receptors using Western blot, flow cytometry, and confocal microscopy in MDPC-23 cells...
December 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28721995/comparative-evaluation-of-laser-microtextured-implant-versus-machined-collar-implant-for-soft-and-hard-tissue-attachment-a-clinical-and-radiological-study
#11
Saroj Kumar Rath, Manab Kosala, Ankit Gupta
BACKGROUND: Various mechanical modifications in the collar region of endosseous implants is a challenge for better performance and osseointegration. Here is a comparative evaluation being carried out to find out the effect of the machined collar (MC) and Laser-Lok (LL)-modified titanium implants on the success of implants being commonly advocated in partially edentulous among serving personnel and their families. MATERIALS AND METHODS: Twenty-four patients with appropriate inclusion and exclusion criteria were selected for placement of Biohorizons MC and LL implants in 12 cases each...
May 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28709940/investigation-of-l-leucine-in-reducing-the-moisture-induced-deterioration-of-spray-dried-salbutamol-sulfate-power-for-inhalation
#12
Liang Li, Sharon Shui Yee Leung, Thomas Gengenbach, Jiaqi Yu, Ge Fiona Gao, Patricia Tang, Qi Tony Zhou, Hak-Kim Chan
The aim of this study was to investigate the ability of L-leucine (LL) in preventing moisture-induced deterioration in the in vitro aerosolization performance of spray-dried (SD) salbutamol sulfate (SS). Increasing mass fraction of LL (5-80%) were co-spray dried with SS, and the physicochemical properties of the powders were characterized by laser diffraction, X-ray powder diffraction (XRD) and dynamic vapour sorption (DVS). Furthermore, the surface morphology and chemistry of fine particles was analyzed by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS)...
September 15, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28555272/anatomical-variants-and-bilateral-lacrimal-pathways-surgery-avoiding-unnecessary-surgery
#13
Alberto Raposo, Francisco García-Purriños, Francisco Piqueras, María Ll Martínez-Martinez, Jerónimo Lajara
Success rates (SR) of transcanalicular diode laser-assisted dacryocystorhinostomy (TCL DCR) may be affected by the presence of nasal anatomical variations and additionally by whether or not the pathology is bilateral. The aim is to determine whether it is necessary to perform preliminary nasal anatomical variations surgery and to determine whether bilateral cases may be operated simultaneously. We extracted the patients undergoing simultaneous bilateral TCL DCR and we compared SR across the different groups using ANOVA, Chi-square testing and logistical regression...
August 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28492152/effect-of-stone-composition-on-the-outcomes-of-semi-rigid-ureteroscopy-using-holmium-yttrium-aluminum-garnet-laser-or-pneumatic-lithotripsy
#14
COMPARATIVE STUDY
Mustafa Kadihasanoglu, Ugur Yucetas, Mehmet Gokhan Culha, Erkan Erkan, Mahmut Gokhan Toktas
OBJECTIVE: To compare the effectiveness of laser lithotripsy (LL) and pneumatic lithotripters (PL) in calcium oxalate (CaOx) and calcium phosphate (CaP) stones and assess whether these stone compositions affect the outcomes of LL and PL. STUDY DESIGN: Comparative, descriptive study. PLACE AND DURATION OF STUDY: Istanbul Training and Research Hospital, Turkey, from August 2010 to August 2015. METHODOLOGY: A total of 114 patients underwent ureteroscopy using LL and PL...
April 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28383430/timing-of-surgical-ligation-and-morbidities-in-very-low-birth-weight-infants
#15
COMPARATIVE STUDY
YoungAh Youn, Cheong-Jun Moon, Jae-Young Lee, Cheul Lee, In Kyung Sung
The present study examined whether early patent ductus arteriosus (PDA) surgical ligation at ≤2 weeks of life was associated with increased morbidities and mortality in very low birth weight infants (VLBWIs) who were diagnosed with hemodynamically significant (hs) PDA. Between December 2013 and December 2015, a total of 407 VLBWIs were admitted, of whom 145 (35.6%) infants were diagnosed with an hs PDA. The clinical data for these infants were retrospectively collected for analysis. Among the 145 VLBWIs with an hs PDA, 58 (40%) infants had surgical ligation for PDA; of these, 29 (50%) infants had early ligation (EL; ligation at ≤2 weeks of life) and 29 (50%) infants had late ligation (LL; ligation at ≥2 weeks of life)...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28271355/to-dust-or-not-to-dust-a-systematic-review-of-ureteroscopic-laser-lithotripsy-techniques
#16
REVIEW
Javier E Santiago, Adam B Hollander, Samit D Soni, Richard E Link, Wesley A Mayer
PURPOSE OF REVIEW: This review discusses factors affecting outcomes during ureteroscopy (URS) with laser lithotripsy (LL), explores specific clinical challenges to the efficacy of URS LL, and reviews the available literature comparing the dusting and basketing approaches to URS LL. RECENT FINDINGS: Data show high stone-free rates with URS LL in all locations of the urinary tract and with all stone types and sizes. Recent data comparing LL with dusting versus basketing suggest higher rates of residual fragments with dusting but less utilization of ureteral access sheaths and potentially shorter operative times...
April 2017: Current Urology Reports
https://www.readbyqxmd.com/read/28198883/angle-resolved-coherent-wave-mixing-using-a-4-fs-ultra-broad-bandwidth-laser
#17
I P Mercer, T Witting, T Driver, R J Cogdell, J P Marangos, J W G Tisch
We demonstrate angle-resolved coherent (ARC) wave mixing using 4 fs light pulses derived from a laser source that spans 550-1000 nm. We believe this to be the shortest pulse duration used to date in coherent multi-dimensional spectroscopy. The marriage of this ultra-broad band, few-cycle coherent source with the ARC technique will permit new investigations of the interplay between energy transfers and quantum superposition states spanning 8200  cm<sup>-1</sup>. We applied this configuration to measurements on the photosynthetic low light (LL) complex from Rhodopseudomonas palustris in solution at ambient temperature...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28174421/streptomyces-euryhalinus-sp-nov-a-new-actinomycete-isolated-from-a-mangrove-forest
#18
Kaushik Biswas, Jayanta D Choudhury, Riddhi Mahansaria, Malay Saha, Joydeep Mukherjee
A Gram-positive, aerobic, non-motile actinomycete (strain MS 3/20(T)) was isolated from the sediment of the Sundarbans mangrove forest in India. On International Streptomyces Project (ISP) medium 2, the isolate produced yellowish brown to red aerial hyphae that carried spiny-surfaced spores in a retinaculum-apertum arrangement. Whole-cell hydrolysate of the strain contained LL-diaminopimelic acid and galactose. Predominant menaquinones were MK-9(H8) and MK-9(H6). Diagnostic polar lipids were glycolipid, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, unidentified phospholipid and unidentified amino lipid...
June 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28005786/the-comparison-of-the-efficacy-of-blue-light-emitting-diode-light-and-980-nm-low-level-laser-light-on-bone-regeneration
#19
COMPARATIVE STUDY
Ömür Dereci, Alper Sindel, Havva Serap Toru, Esra Yüce, Sinan Ay, Sinan Tozoğlu
The aim of this study is to histologically compare effects of blue light-emitting diode (LED) light (400-490 nm) and Ga-Al-As low-level diode laser light (980 nm) on bone regeneration of calvarial critical-sized defects in rats. Thirty Wistar Albino rats were included in the study. The experimental groups were as follows: blue LED light (400-490 nm) group (LED); 980-nm low-level laser light group (LL); and no-treatment, control group (CL). A critical-sized defect of 8 mm was formed on calvaria of rats...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27955693/three-dimensional-surface-and-ultrasound-imaging-for-daily-igrt-of-prostate-cancer
#20
Marco Krengli, Gianfranco Loi, Carla Pisani, Debora Beldì, Giuseppina Apicella, Valentina Amisano, Marco Brambilla
BACKGROUND: Image guided radiotherapy (IGRT) is an essential pre-requisite for delivering high precision radiotherapy. We compared daily variation detected by two non-ionizing imaging modalities (surface imaging and trans-abdominal ultrasound, US) to verify prostate patient setup and internal organ variations. METHODS: Forty patients with organ confined prostate cancer and candidates to curative radiotherapy were enrolled in this prospective study. At each treatment session, after laser alignment, all patients received imaging by a 3D-surface and a 3D-US system...
December 13, 2016: Radiation Oncology
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