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https://www.readbyqxmd.com/read/29783693/microstructural-evolution-in-high-strain-rate-deformation-of-ti-5al-5mo-5v-1cr-1fe-alloy
#1
Chun Ran, Pengwan Chen, Zemin Sheng, Jingbo Li, Wangfeng Zhang
To study the microstructural evolution in high-strain-rate shear deformation of Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloy, a series of forced shear tests of hat-shaped specimens have been conducted using a split Hopkinson pressure bar combined with the "strain-frozen" technique. A localized shear band is induced in Ti-55511 alloy in these tests. The experimental results demonstrate that the flow stress in hat-shaped specimens remains constant (about 600 MPa) and is independent of punching depth. The width of the adiabatic shear band increases with increasing punching depth and tends to saturate at 30 μm, and the estimation of the adiabatic shear band (ASB) width in hat-shaped (HS) specimens has been modified...
May 18, 2018: Materials
https://www.readbyqxmd.com/read/29783086/biomechanical-comparison-of-cemented-vs-non-cemented-anterior-screw-fixation-in-type-ii-odontoid-fractures-in-the-elderly-a-cadaveric-study
#2
Petr Rehousek, Edward Jenner, James Holton, Marcin Czyz, Lukas Capek, Petr Henys, Marketa Kulvajtova, Martin Krbec, Jiri Skala-Rosenbaum
Background Context Odontoid process fractures are the most common injuries of the cervical spine in the elderly. Anterior screw stabilisation of type 2 odontoid process fractures improves survival and function in these patients but may be complicated by failure of fixation. Purpose To determine whether cement augmentation of a standard anterior screw provides biomechanically superior fixation of type II odontoid fractures in comparison to a non-cemented standard screw. Study design Twenty human cadaveric C2 vertebrae from elderly donors (mean age 83 years) were obtained...
May 18, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29782306/urticarial-lesions-in-a-pregnant-woman
#3
Sergio Santos-Alarcón, Cesar Benavente-Villegas, Isabel García-Briz, Magdalena Moneva-Léniz, Celia Sanchis-Sánchez, Almudena Mateu-Puchades
Dear Editor, Gestational pemphigoid (GP) is a rare autoimmune bullous dermatosis in pregnancy. GP usually occurs during the second or third month of pregnancy. It clinically manifests as the development of either early-onset urticarial lesions or late-onset subepidermal blisters that may linger for weeks or even months. Herein we report the case of a 45-year-old woman with the distinctive clinical onset of GP. A forty-five-year-old woman, gravida I, para 0, at 27 weeks gestation, was referred for evaluation to our Department with an extensive pruritic eruption that had developed over the previous 7 days...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29782305/tatami-mats-a-source-of-pitted-keratolysis-in-a-martial-arts-athlete
#4
Anamaria Balić, Zrinka Bukvić Mokos, Branka Marinović, Daniela Ledić Drvar
Dear Editor, Pitted keratolysis (PK), also known as keratosis plantaris sulcatum, is a non-inflammatory, bacterial, superficial cutaneous infection, characterized by many discrete superficial crateriform ''pits'' and erosions in the thickly keratinized skin of the weight-bearing regions of the soles of the feet (1). The disease often goes unnoticed by the patient, but when it is noticed it is because of the unbearable malodor and hyperhidrosis of the feet, which are socially unacceptable and cause great anxiety to many of the patients...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29776642/blunt-splenic-injury-during-colonoscopy-is-it-as-rare-as-we-think
#5
Erin G Andrade, Olubode A Olufajo, Eleanor L Drew, Grant V Bochicchio, Laurie J Punch
BACKGROUND: Post colonoscopy blunt splenic injury (PCBSI) is a rarely reported and poorly recognized event. We analyzed cases of PCBSI managed at our hospital and compared them to existing literature. METHODS: We identified 5 patients admitted with PCBSI through chart review. RESULTS: There were 5 cases of PCBSI identified from April 2016-July 2017. Four of the patients were older than 65 years, three had prior surgeries, and all were women...
May 12, 2018: American Journal of Surgery
https://www.readbyqxmd.com/read/29775811/determination-of-docetaxel-in-dried-blood-spots-by-lc-ms-ms-method-development-validation-and-clinical-application
#6
S Raymundo, V V Muller, N B Andriguetti, M Tegner, A C Artmann, H M Kluck, M A Franzoi, R M M Vilela, G Schwartsmann, R Linden, M V Antunes
In this study, a LC-MS/MS method for the measurement of docetaxel in Dried Blood Spots (DBS) samples was developed and validated. Docetaxel was extracted from 8 mm DBS punch with a mixture of methanol and acetonitrile (9:1, v/v). The chromatographic separation occurred in an Acquity® C18 column (150 × 2.1 mm, 1.7 μm) eluted with a mixture of water and acetonitrile plus 0.1% formic acid (45:55, v/v). Total analytical run time was 7 min. The method was linear from 50 to 3000 ng ml-1 . Precision assays showed CV% < 9...
May 15, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29774079/long-non-coding-rnas-ac026904-1-and-uca1-a-one-two-punch-for-tgf-%C3%AE-induced-snai2-activation-and-epithelial-mesenchymal-transition-in-breast-cancer
#7
Guo-Yin Li, Wei Wang, Jian-Yong Sun, Bo Xin, Xiang Zhang, Ting Wang, Qian-Feng Zhang, Li-Bo Yao, Hua Han, Dai-Ming Fan, An-Gang Yang, Lin-Tao Jia, Lei Wang
Transforming growth factor-β (TGF-β) has received much attention as a major inducer of epithelial-mesenchymal transition (EMT) during cancer progression, mainly by activating a set of pleiotropic transcription factors including SNAI2/Slug. However, the involvement of long non-coding RNAs (lncRNAs) in TGF-β-induced Slug activation and EMT remains largely unknown. Methods: In this study, we used microarray analysis to compare lncRNA expression profiles between TGF-β treated and untreated breast cancer cells...
2018: Theranostics
https://www.readbyqxmd.com/read/29771705/the-causality-nexus-between-the-tako-tsubo-syndrome-and-an-assault-a-forensic-case-report
#8
Malek Zribi, Syrine Azza Manoubi, Narjes Karray, Salma Charfeddine, Wiem Benamar, Zouhir Hammami, Samir Kammoun, Samir Maatoug
"Tako-tsubo" cardiomyopathy, also known as "broken heart syndrome," is one of the rarest types of stress-induced cardiomyopathy. It frequently mimics acute coronary syndrome, characterized by transient left ventricular dysfunction, electrocardiographic changes, and release of myocardial enzymes. After treatment, the patients are cured in most cases without sequelae. Tako-tsubo syndrome is rarely considered as a reason for consultation in the forensic department.Herein, we report a case of a 68-year-old woman who was assaulted by her police officer neighbor...
May 4, 2018: American Journal of Forensic Medicine and Pathology
https://www.readbyqxmd.com/read/29770623/quality-of-tissue-from-punch-biopsy-forceps-vs-round-loop-electrode-in-colposcopically-directed-biopsy-a-randomized-controlled-trial
#9
Thanita Wetcho, Athithan Rattanaburi, Kanet Kanjanapradit
OBJECTIVE: To compare the quality of tissue from punch biopsy forceps (PB group) with round loop electrode (LE group) in colposcopically directed biopsy along with the evaluation of pain associated with each procedure. METHODS: Patients with abnormal cervical cytologic results and abnormal colposcopic findings were enrolled into a randomized trial into either a PB group or LE group. The quality of tissue was evaluated in regards to the size of tissue, site of tissue, and tissue damage...
March 12, 2018: Journal of Gynecologic Oncology
https://www.readbyqxmd.com/read/29769770/clinical-and-histological-evaluation-on-application-of-platelet-concentrates-on-depigmented-gingival-epithelium
#10
Koel Debnath, Anirban Chatterjee
Background: The platelet concentrate is a windfall in the field of regenerative therapy in periodontology. It accelerates wound healing by excellent neovascularization and promoting fast cicatricle tissue remodeling. Aim: This study aims to evaluate clinically and histologically accelerated effect of platelet-rich fibrin (PRF) membrane and PRF matrix (PRFM) following depigmentation procedure. Materials and Methods: Eleven individuals were divided into three groups after depigmentation procedure...
March 2018: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/29763480/spontaneous-regression-of-merkel-cell-carcinoma
#11
Sean Branch, Kenneth Maloney, Stephen M Purcell
A 96-year-old woman presented with a rapidly enlarging lesion overlying the suprasternal notch. The lesion originated as a small, erythematous, scaly macule that rapidly increased in size over 8 weeks and became an ulcerated nodule measuring 5 cm in diameter and 4.5 cm in thickness. A 4-mm punch biopsy showed a poorly differentiated tumor with cells that were positive for CAM 5.2 and cytokeratin 20 in a dotlike paranuclear pattern and negative for cytokeratin 5/6, human melanoma black 45, and leukocyte common antigen...
April 2018: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/29763476/drug-induced-linear-iga-bullous-dermatosis-in-a-patient-with-a-vancomycin-impregnated-cement-spacer
#12
Kelsie Riemenschneider, Daren A Diiorio, John A Zic, Matthew R Livingood, Jo-David Fine, Jennifer G Powers, Jeffrey P Zwerner, Eric Tkaczyk
Linear IgA bullous dermatosis (LABD) is an autoimmune blistering rash caused by IgA autoantibodies against the epidermal basement membrane zone. It commonly is drug induced, often in association with systemic vancomycin. We report a case of a previously healthy 77-year-old man who developed a diffuse macular rash and hemorrhagic bullae on the left leg 10 days after placement of a vancomycin-impregnated cement spacer (VICS) during a revision knee arthroplasty and initiation of postoperative treatment with intravenous (IV) vancomycin...
April 2018: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/29750354/jung-and-mr-punch-as-mythologems
#13
Dale Mathers
This paper explores how we can make our own mythological version of 'Jung' say whatever we want. Excessive veneration gets in the way of his theories being allowed to stand on their own. Understanding 'Jung' as a mythologem provides a way out of this intoxication with identification by letting us recollect and re-connect to the Collective Unconscious.
June 2018: Journal of Analytical Psychology
https://www.readbyqxmd.com/read/29747155/manual-punch-versus-automated-flow-through-sample-desorption-for-dried-blood-spot-lc-ms-ms-analysis-of-voriconazole
#14
Lisa C Martial, Erik van den Hombergh, Cornelis Tump, Otto Halmingh, David M Burger, Erik M van Maarseveen, Roger J Brüggemann, Rob E Aarnoutse
Dried blood spot (DBS) sampling is a patient-friendly alternative for plasma sampling for the purpose of therapeutic drug monitoring (TDM). To speed up the analysis time, an automated flow-through desorption method of DBS samples may be beneficial. This article describes the cross-validation of a manual punch DBS method with an automated desorption (DBS autosampler, DBSA) method for the DBS analysis of the antifungal drug voriconazole, followed by cross-validation of both DBS methods with a plasma-based method, and an assessment of agreement between DBS/DBSA and regular plasma concentration measurements (gold standard) in samples from patients on voriconazole treatment...
April 27, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29747144/measurement-of-lidocaine-and-2-6-dimethylaniline-in-minipig-plasma-skin-and-dermal-tapes-using-uhplc-with-electrospray-ms-ms
#15
Qian Li, Tobias Magers, Brad King, Brian J Engel, Ray Bakhtiar, Charisse Green, Ronald Shoup
Sensitive LC-MS/MS methods were developed to measure lidocaine and its metabolite 2,6-dimethylaniline (2,6-DMA) with application to transdermal studies. The methods for lidocaine in minipig plasma, tissue biopsies, and dermal tapes utilized mixed mode/SCX solid phase extraction, with lower quantitation limits of 25 pg/mL in plasma, 15 ng/g tissue, and 5 ng/tape. 2,6-DMA was measured in plasma and skin tissue homogenates by ultrafiltration and (for tissue) by further derivatization with 4-methoxybenzoyl chloride to form the corresponding benzamide derivative, which extended the lower limit of quantitation to 200 pg/mL...
April 18, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29744425/preliminary-focus-on-the-mechanical-and-antibacterial-activity-of-a-pmma-based-bone-cement-loaded-with-gold-nanoparticles
#16
T Russo, A Gloria, R De Santis, U D'Amora, G Balato, A Vollaro, O Oliviero, G Improta, M Triassi, L Ambrosio
In total knee arthroplasty (TKA) and total hip replacement (THR) the restoration of the normal joint function represents a fundamental feature. A prosthetic joint must be able to provide motions and to transmit functional loads. As reported in the literature, the stress distribution may be altered in bones after the implantation of a total joint prosthesis. Some scientific works have also correlated uncemented TKA to a progressive decrease of bone density below the tibial component. Antibiotic-loaded bone cements are commonly employed in conjunction with systemic antibiotics to treat infections...
September 2017: Bioactive Materials
https://www.readbyqxmd.com/read/29741410/management-of-resistant-halo-nevi
#17
Sherif S Awad, Rasha Ta Abdel Aziz, Sahar S Mohammed
BACKGROUND: Halo nevus (HN) is a rare dermatologic disorder characterized by typical whitish rim surrounding an existing melanocytic nevus resembling halo. It is a cosmetic problem that may be linked to vitiligo, and it is advised to remove these nevi in order to avoid development of vitiligo. OBJECTIVES: The aim of the present study is to evaluate the cosmetic outcome after nevus removal and leukoderma dermabrasion with epithelial graft followed by narrow-band ultraviolet B (NB-UVB) phototherapy as management of resistant halo nevi and avoidance of development of vitiligo...
May 9, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29738301/ultrasound-assisted-debridement-of-neuroischaemic-diabetic-foot-ulcers-clinical-and-microbiological-effects-a-case-series
#18
José Luis Lázaro-Martínez, Francisco Javier Álvaro-Afonso, Yolanda García-Álvarez, Raúl Juan Molines-Barroso, Esther García-Morales, David Sevillano-Fernández
OBJECTIVE: To evaluate the clinical and microbiological effects of sequential wound debridement in a case series of neuroischaemic diabetic foot ulcers (DFUs) using an ultrasound-assisted wound debridement (UAW) device. METHOD: A prospective, single-centre study, involving a case series of 24 neuroischaemic DFUs, was conducted to evaluate sequential wound debridement with UAW during a six-week treatment period. Soft tissue punch biopsies were taken every second week of treatment, both before and after wound debridement sessions...
May 2, 2018: Journal of Wound Care
https://www.readbyqxmd.com/read/29737221/injuries-in-karate-systematic-review
#19
Roger E Thomas, Jodie Ornstein
OBJECTIVES: to identify all studies of Karate injuries and assess injury rates, types, location, and causes. METHODS: Six electronic and four grey literature databases were searched. Two reviewers independently assessed titles/abstracts, abstracted data and assessed risk-of-bias with the Newcastle-Ottawa scale. Average injury rates/1000AE (AE = athletic-encounter) and/1000minutesAE, injury location and type weighted by study size were calculated. RESULTS: In competitions rates of injury/1000AE and/1000 minutesAE were similar for males (111...
May 8, 2018: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/29733949/influence-of-extended-dwell-time-during-pre-and-main-compression-on-the-properties-of-ibuprofen-tablets
#20
E Peeters, A F T Silva, M Fonteyne, T De Beer, C Vervaet, J P Remon
The low melting point, poor flow, physico-mechanical properties (particle size distribution, shape, particle surface roughness) and deformation mechanism of ibuprofen in combination with its high dose in tablets all contribute to the problems observed during the compaction of ibuprofen-based formulations. Since ibuprofen is plastically and elastically deforming, the rate of compaction plays an important role in both the final tablet properties and the risk of capping, laminating and sticking to the punches...
May 4, 2018: European Journal of Pharmaceutics and Biopharmaceutics
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