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https://www.readbyqxmd.com/read/29773819/a-comprehensive-study-on-microstructure-and-tensile-behaviour-of-a-selectively-laser-melted-stainless-steel
#1
Chunlei Qiu, Mohammed Al Kindi, Aiman Salim Aladawi, Issa Al Hatmi
316L stainless steel samples have been prepared by selective laser melting (SLM) using a pulsed laser mode and different laser powers and scanning patterns. The as-fabricated samples were found to be dominated by clusters of nano-sized γ needles or cells. TEM imaging shows that these needles contain a high population of dislocations while TEM-EDX analysis reveals high chemical homogeneity throughout the as-fabricated samples as evidenced by the fact that there is even no micro-/nano-segregation at interfaces between neighbouring γ needles...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29761519/evaluation-of-needle-trap-micro-extraction-and-solid-phase-micro-extraction-obtaining-comprehensive-information-on-volatile-emissions-from-in-vitro-cultures
#2
Peter Oertel, Andreas Bergmann, Sina Fischer, Phillip Trefz, Anne Küntzel, Petra Reinhold, Heike Köhler, Jochen K Schubert, Wolfram Miekisch
Volatile organic compounds (VOCs) emitted from in vitro cultures may reveal information on species and metabolism. Due to low nmol L-1 concentration ranges, pre-concentration techniques are required for gas-chromatography mass-spectrometry (GC-MS) based analyses. This study was intended to compare the efficiency of established micro-extraction techniques - solid-phase micro-extraction (SPME) and needle-trap micro-extraction (NTME) - for the analysis of complex VOC patterns. For SPME, a 75 μm Carboxen®/Polydimethylsiloxane fibre was used...
May 14, 2018: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29725860/systematic-literature-review-of-clinical-and-economic-outcomes-of-micro-invasive-glaucoma-surgery-migs-in-primary-open-angle-glaucoma
#3
REVIEW
Pavi Agrawal, Steven E Bradshaw
INTRODUCTION: Primary open-angle glaucoma is estimated to affect 3% of the population aged 40-80 years. Trabeculectomy is considered the gold standard in surgical management of glaucoma; however, it is a technically complex procedure that may result in a range of adverse outcomes. Device-augmented, minimally invasive procedures (micro-invasive glaucoma surgeries, MIGS) have been developed aiming for safer and less invasive intraocular pressure (IOP) reduction compared with traditional surgery...
May 3, 2018: Ophthalmology and Therapy
https://www.readbyqxmd.com/read/29723455/-impacts-of-different-procedures-of-testicular-sperm-retrieval-on-testicular-function-and-antisperm-antibodies-in-azoospermia-patients
#4
Yang-Yang Hu, Li-Yuan Wang, Bo-Tian Song, Shun-Shun Cao, Ao-Lei Chen
Objective: To investigate the influence of different procedures of testicular sperm retrieval on the levels of serum inhibin B (INHB), antisperm antibodies (AsAb), follicle-stimulating hormone (FSH), and testosterone (T) in patients with azoospermia. METHODS: We randomly assigned 210 azoospermia patients to receive testicular sperm extraction (TESE, n = 50), testicular sperm aspiration (TESA, n = 56), testicular fine needle aspiration (TEFNA, n = 64), or microscopic TESE (micro-TESE, n = 40)...
July 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
https://www.readbyqxmd.com/read/29713543/advances-in-sperm-retrieval-techniques-in-azoospermic-men-a-systematic-review
#5
Rupin Shah, Chirag Gupta
Objective: To evaluate various methods of operative sperm retrieval in men with non-obstructive azoospermia (NOA) and to determine the optimal surgical approach in terms of effectiveness, morbidity, and complications. Materials and methods: PubMed and Cochrane databases were searched to identify five recent reviews and meta-analyses evaluating outcomes for sperm retrieval in men with NOA. Results and Conclusion: Micro-TESE is the most efficient method for retrieving sperm but requires special expertise and can be traumatic for the testes...
March 2018: Arab Journal of Urology
https://www.readbyqxmd.com/read/29710557/quantification-of-the-traffic-generated-particulate-matter-capture-by-plant-species-in-a-living-wall-and-evaluation-of-the-important-leaf-characteristics
#6
Udeshika Weerakkody, John W Dover, Paul Mitchell, Kevin Reiling
Traffic-generated particulate matter (PM) is a significant fraction of urban PM pollution and little is known about the use of living walls as a short-term strategy to reduce this pollution. The present study evaluated the potential of twenty living wall plants to reduce traffic-based PM using a living wall system located along a busy road in Stoke-on-Trent, UK. An Environmental Scanning Electron Microscope (ESEM) and ImageJ software were employed to quantify PM accumulation on leaves (PM1 , PM2.5 and PM10 ) and their elemental composition was determined using Energy Dispersive X-ray (EDX)...
April 20, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29677140/flow-channel-influence-of-a-collision-based-piezoelectric-jetting-dispenser-on-jet-performance
#7
Can Zhou, Guiling Deng, Junhui Li, Ji'an Duan
To improve the jet performance of a bi-piezoelectric jet dispenser, mathematical and simulation models were established according to the operating principle. In order to improve the accuracy and reliability of the simulation calculation, a viscosity model of the fluid was fitted to a fifth-order function with shear rate based on rheological test data, and the needle displacement model was fitted to a nine-order function with time based on real-time displacement test data. The results show that jet performance is related to the diameter of the nozzle outlet and the cone angle of the nozzle, and the impacts of the flow channel structure were confirmed...
April 20, 2018: Sensors
https://www.readbyqxmd.com/read/29625868/combined-use-of-flexible-ureteroscopic-lithotripsy-with-micro-percutaneous-nephrolithotomy-in-pediatric-multiple-kidney-stones
#8
Jun Li, Wenying Wang, Yuan Du, Ye Tian
BACKGROUND: We investigated the clinical value of treating pediatric multiple kidney stones with extensive distribution using flexible ureteroscopic lithotripsy (FUL) combined with micro-percutaneous nephrolithotomy (micro-PNL). PATIENTS AND METHODS: In total, 21 pediatric patients with multiple renal calculi between May 2016 and June 2017 received FUL combined with micro-PNL. The group included 13 boys and eight girls; the patients' mean age was 3.8 years (range 1-8 years)...
March 28, 2018: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/29558492/comparative-analysis-of-volatile-organic-compounds-for-the-classification-and-identification-of-mycobacterial-species
#9
Anne Küntzel, Peter Oertel, Sina Fischer, Andreas Bergmann, Phillip Trefz, Jochen Schubert, Wolfram Miekisch, Petra Reinhold, Heike Köhler
BACKGROUND: Species of Mycobacteriaceae cause serious zoonotic diseases in mammals, for example tuberculosis in humans, dogs, parrots, and elephants (caused by Mycobacterium tuberculosis) and in ruminants and humans (caused by M. bovis and M. caprae). Pulmonary diseases, lymphadenitis, skin diseases, and disseminated diseases can be caused by non-tuberculous mycobacteria (NTM). Diagnosis and differentiation among Mycobacterium species are currently done by culture isolation. The established diagnostic protocols comprise several steps that allow species identification...
2018: PloS One
https://www.readbyqxmd.com/read/29545537/publisher-correction-minimally-invasive-micro-indentation-mapping-tissue-mechanics-at-the-tip-of-an-18g-needle
#10
Steven V Beekmans, Kaj S Emanuel, Theodoor H Smit, Davide Iannuzzi
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
March 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29527323/visualisation-of-facet-joint-recesses-of-the-cadaveric-spine-a-micro-ct-and-sheet-plastination-study
#11
Casper G Thorpe Lowis, Zhaoyang Xu, Ming Zhang
Objectives: The size and shape of a joint cavity are the key determinates for the mobility of the joint. The anatomy and configuration of the facet joint (FJ) recesses at different levels of the spine remain unclear and controversial. The aim of this study was to identify the configuration of the FJ recesses in the cervical, thoracic and lumbar spine using a combination of micro-CT and sheet plastination techniques. Methods: Of 19 cadavers (9 males, 10 females, age range of 54-89 years), the FJ cavities of 3 spines were injected with contrast filling and scanned with micro-CT, and 16 plastinated spines were prepared as the series of sagittal (9 sets), transverse (5 sets) or coronal (2 sets) sections with a thickness of 2...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29510146/feasibility-and-safety-of-microforceps-biopsy-in-the-diagnosis-of-pancreatic-cysts
#12
Omer Basar, Osman Yuksel, Dennis J Yang, Jason Samarasena, David Forcione, Christopher J DiMaio, Mihir S Wagh, Kenneth Chang, Brenna Casey, Carlos Fernandez-Del Castillo, Martha B Pitman, William R Brugge
BACKGROUND AND AIMS: The tissue acquisition and diagnostic yield of cyst fluid cytology is low-to-moderate and rarely provides a specific diagnosis. The aim of this study was to compare the tissue acquisition and diagnostic tissue yield of microforceps biopsy (MFB) with cyst fluid cytology. METHODS: In this multicenter study, data of 42 patients who had cysts both aspirated by EUS-guided FNA (EUS-FNA) and biopsy specimens were then obtained with an MFB device, were collected...
March 3, 2018: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29497768/the-all-seeing-needle-micro-pcnl-versus-flexible-ureterorenoscopy-for-lower-calyceal-stones-of-%C3%A2-2-cm
#13
Kehua Jiang, Hongbo Chen, Xiao Yu, Zhiqiang Chen, Zhangqun Ye, Huixing Yuan
The objectives of the study are to compare the safety and efficacy of "all-seeing needle" optical puncture system micro-percutaneous nephrolithotomy (micro-PCNL) and flexible ureterorenoscopy (FURS) for the treatment of lower calyceal stones of ≤ 2 cm and to determine the advantages and disadvantages of each. 116 patients in total with lower calyceal stones of ≤ 2 cm were randomly divided into two equal groups, "all-seeing needle" optical puncture system micro-PCNL and FURS. In both groups, holmium laser was utilized for lithotripsy...
March 1, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29451317/ultrasound-guided-microinvasive-carpal-tunnel-release-using-a-novel-retractable-needle-mounted-blade-a-cadaveric-study
#14
Peter D Hebbard, Andrew I T Hebbard, Janos Tomka, Richard Appleyard
Ultrasound (US)-guided microinvasive procedures are defined as those performed via needles without notable scarring. Ten cadaver hands underwent US-guided microinvasive carpal tunnel release using a novel needle-based tool, the micro i-Blade (Summit Medical Products, Inc, Sandy, UT). A US-imaged landmark, the inflexion point of the ligaments distal to the hook of the hamate, was used to position the distal extent of the cut. The transverse carpal ligament was successfully released in all hands without damage to nerves or arteries...
February 16, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29421219/development-of-stabilizing-formulations-of-a-trivalent-inactivated-poliovirus-vaccine-in-a-dried-state-for-delivery-in-the-nanopatch%C3%A2-microprojection-array
#15
Ying Wan, John M Hickey, Christopher Bird, Katey Witham, Paul Fahey, Angus Forster, Sangeeta B Joshi, David B Volkin
The worldwide switch to inactivated polio vaccines (IPVs) is a key component of the overall strategy to achieve and maintain global polio eradication. To this end, new IPV vaccine delivery systems may enhance patient convenience and compliance. In this work, we examine Nanopatch™ (a solid, polymer microprojection array) which offers potential advantages over standard needle/syringe administration including intradermal delivery and reduced antigen doses. Using trivalent IPV (tIPV) and a purpose-built evaporative dry-down system, candidate tIPV formulations were developed to stabilize tIPV during the drying process and on storage...
February 6, 2018: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29415859/effects-of-transdermal-lidocaine-or-lidocaine-with-prilocaine-or-tetracaine-on-mechanical-superficial-sensation-and-nociceptive-thermal-thresholds-in-horses
#16
Franz J Söbbeler, Sabine Br Kästner
OBJECTIVE: To evaluate the transdermal local anaesthetic effect of lidocaine or lidocaine combined with prilocaine or tetracaine in horses. STUDY DESIGN: Experimental, randomized study. ANIMALS: A total of five healthy adult warmblood horses. METHODS: Horses were clipped bilaterally at the withers, cranial saddle area and caudal saddle area. Baseline measurements for mechanical superficial sensation via von Frey filaments and nociceptive thermal thresholds were performed...
March 2018: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29409286/percutaneous-soft-tissue-release-performed-using-a-blunt-cannula-in-rabbits-with-chronic-collagenase-induced-achilles-tendinopathy
#17
Yueh-Ling Hsieh, Ming-Ta Lin, Chang-Zern Hong, Hsin-Shui Chen
BACKGROUND: This study investigated the effects of percutaneous soft tissue release (PSTR) performed using a blunt cannula on (1) the inflammatory cells-count, (2) expressions of calcitonin gene-related peptide (CGRP) and (3) substance P (SP) in rabbits with chronic phase of collagenase-induced Achilles tendinopathy. METHODS: Thirty-two adult male New Zealand rabbits were randomly divided into four groups: (1) collagenase and PSTR treatment; (2) collagenase and sham-operated PSTR treatment; (3) vehicle-only injection and PSTR treatment; and (4) vehicle-only injection and sham-operated PSTR treatment...
October 29, 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29378433/passive-delivery-of-protein-drugs-through-transdermal-route
#18
Bivek Chaulagain, Ankit Jain, Ankita Tiwari, Amit Verma, Sanjay K Jain
Skin is the largest external organ in the human body but its use for therapeutic purposes has been minimal. Stratum corneum residing on the uppermost layer of the skin provides a tough barrier to transport the drugs across the skin. Very small group of drugs sharing Lipinski properties, i.e. drugs having molecular weight not larger than 500 Da, having high lipophilicity and optimum polarity are fortunate enough to be used on skin therapeutics. But, at a time where modern therapeutics is slowly shifting from use of small molecular drugs towards the use of macromolecular therapeutic agents such as peptides, proteins and nucleotides in origin, skin therapeutics need to be evolved accordingly to cater the delivery of these agents...
January 29, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29355518/rapid-single-step-formation-of-liposomes-by-flow-assisted-stationary-phase-interdiffusion
#19
Chandra Has, Sopan M Phapal, P Sunthar
Laboratory preparation of unilamellar liposomes often involves multiple steps carried out over several hours to achieve a monodisperse size distribution. Here, we present a methodology based on a recently introduced lipid self-assembly principle-stationary phase interdiffusion (SPI)-to prepare large unilamellar vesicles (LUVs) of a monodisperse population in a short period of about 10 min. The stationary interface between a lipid-ethanol phase and an aqueous phase is created by a density difference induced convective flow in a horizontal capillary...
January 31, 2018: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/29324482/enhanced-needle-visibility-by-micro-air-bubble-contrast-in-ultrasound-guided-nerve-block
#20
Yong Liu, Wei Mei
No abstract text is available yet for this article.
January 12, 2018: Anesthesiology
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