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https://www.readbyqxmd.com/read/27748691/investigation-on-the-cutaneous-change-induced-by-face-lifting-monodirectional-barbed-polydioxanone-thread
#1
Jihee Kim, Zhenlong Zheng, Heesu Kim, Kyung Ae Nam, Kee Yang Chung
BACKGROUND: Owing to its potentially greater mechanical force on the implanted tissue, barbed thread is frequently used in face-lifting procedures. However, the long-term durability thereof remains controversial. Moreover, reports on underlying histologic and molecular changes resulting from face-lifting procedures are scarce. OBJECTIVE: To evaluate histologic and molecular changes induced by absorbable, barbed face-lifting thread in an animal model. MATERIALS AND METHODS: Fragments of monofilament, monodirectionally barbed polydioxanone thread were implanted in dorsal skin from 12 guinea pigs...
September 28, 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/27504362/an-innovative-method-of-assessing-the-mechanical-axis-deviation-in-the-lower-limb-in-standing-position
#2
Jagannath Kamath, Raja Shekar Danda, Nikil Jayasheelan, Rohit Singh
INTRODUCTION: Various methods of measuring mechanical axis deviation of lower limb have been described including radiographic and CT scanogram, intraoperative fluoroscopy with the use of an electrocautery cord. These methods determine the mechanical axis in a supine, non-weight bearing position. Although long cassette standing radiographic view is used for the purpose but is not available at most centres. A dynamic method of determining the mechanical axis in a weight bearing position was devised in this study...
June 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27460842/hagfish-slime-and-mucin-flow-properties-and-their-implications-for-defense
#3
Lukas Böni, Peter Fischer, Lukas Böcker, Simon Kuster, Patrick A Rühs
When hagfish (Myxinidae) are attacked by predators, they form a dilute, elastic, and cohesive defensive slime made of mucins and protein threads. In this study we propose a link between flow behavior and defense mechanism of hagfish slime. Oscillatory rheological measurements reveal that hagfish slime forms viscoelastic networks at low concentrations. Mucins alone did not contribute viscoelasticity, however in shear flow, viscosity was observed. The unidirectional flow, experienced by hagfish slime during suction feeding by predators, was mimicked with extensional rheology...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27454946/threading-through-macrocycles-enhances-the-performance-of-carbon-nanotubes-as-polymer-fillers
#4
Alejandro López-Moreno, Belén Nieto-Ortega, Maria Moffa, Alberto de Juan, M Mar Bernal, Juan P Fernández-Blázquez, Juan J Vilatela, Dario Pisignano, Emilio M Pérez
In this work, we study the reinforcement of polymers by mechanically interlocked derivatives of single-walled carbon nanotubes (SWNTs). We compare the mechanical properties of fibers made of polymers and of composites with pristine SWNTs, mechanically interlocked derivatives of SWNTs (MINTs), and the corresponding supramolecular models. Improvements of both Young's modulus and tensile strength of up to 200% were observed for the polystyrene-MINT samples with an optimized loading of just 0.01 wt %, while the supramolecular models with identical chemical composition and loading showed negligible or even detrimental influence...
August 23, 2016: ACS Nano
https://www.readbyqxmd.com/read/27351597/unidirectional-threading-into-a-bowl-shaped-macrocyclic-trimer-of-boron-dipyrrin-complexes-through-multipoint-recognition
#5
Takashi Nakamura, Gento Yamaguchi, Tatsuya Nabeshima
Bowl-shaped macrocycles have the distinctive feature that their two sides are differentiated, and thus can be developed into elaborate hosts that fix a target molecule in a controlled geometry through multipoint interactions. We now report the synthesis of a bowl-shaped macrocyclic trimer of the boron-dipyrrin (BODIPY) complex and its unidirectional threading of guest molecules. Six polarized B(δ+) -F(δ-) bonds are directed towards the center of the macrocycle, which enables strong recognition of cationic guests...
August 8, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27329047/cdse-nanoplatelets-living-polymers
#6
Santanu Jana, Patrick Davidson, Benjamin Abécassis
Colloidal CdSe nanoplatelets are considered to be excellent candidates for many applications in nanotechnology. One of the current challenges is to self-assemble these colloidal quantum wells into large ordered structures to control their collective optical properties. We describe a simple and robust procedure to achieve controlled face-to-face self-assembly of CdSe nanoplatelets into micron-long polymer-like threads made of up to ∼1000 particles. These structures are formed by addition of oleic acid to a stable colloidal dispersion of platelets, followed by slow drying and re-dispersion...
August 1, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27006683/mesoscale-morphology-at-nanoscale-resolution-serial-block-face-scanning-electron-microscopy-reveals-fine-3d-detail-of-a-novel-silk-spinneret-system-in-a-tube-building-tanaid-crustacean
#7
Tomonari Kaji, Keiichi Kakui, Naoyuki Miyazaki, Kazuyoshi Murata, A Richard Palmer
BACKGROUND: The study of morphology is experiencing a renaissance due to rapid improvements in technologies for 3D visualization of complex internal and external structures. But 3D visualization of the internal structure of mesoscale objects - those in the 10-1000 μm range - remains problematic. They are too small for microCT, many lack suitable specific fluorescent markers for confocal microscopy, or they require labor-intensive stacking and smoothing of individual TEM images. Here we illustrate the first comprehensive morphological description of a complete mesoscale biological system at nanoscopic resolution using ultra-modern technology for 3D visualization - serial block-face scanning electron microscopy (SBF-SEM)...
2016: Frontiers in Zoology
https://www.readbyqxmd.com/read/26955050/leveraging-fpgas-for-accelerating-short-read-alignment
#8
James Arram, Thomas Kaplan, Wayne Luk, Peiyong Jiang
One of the key challenges facing genomics today is how to efficiently analyse the massive amounts of data produced by next-generation sequencing platforms. With general-purpose computing systems struggling to address this challenge, specialised processors such as the Field-Programmable Gate Array (FPGA) are receiving growing interest. The means by which to leverage this technology for accelerating genomic data analysis is however largely unexplored. In this paper we present a runtime reconfigurable architecture for accelerating short read alignment using FPGAs...
February 29, 2016: IEEE/ACM Transactions on Computational Biology and Bioinformatics
https://www.readbyqxmd.com/read/26582126/caring-in-an-atmosphere-of-uncertainty-perspectives-and-experiences-of-caregivers-of-peoples-undergoing-haemodialysis-in-iran
#9
Leili Rabiei, Ahmad Ali Eslami, HeidarAli Abedi, Reza Masoudi, Gholam Reza Sharifirad
BACKGROUND: Chronic renal failure is one of the major causes of mortality and disability worldwide. Although dialysis treatment is considered as a life-saving treatment for these patients, their caregivers face various problems making the atmosphere of caring uncertain. AIMS: This study is aimed to explore and describe the experiences and perspectives of family caregivers of the patients undergoing haemodialysis. METHODS: In this study, 20 haemodialysis family caregivers were selected by purposeful sampling...
September 2016: Scandinavian Journal of Caring Sciences
https://www.readbyqxmd.com/read/26441105/hand-clinical-anatomy-and-regional-approaches-with-injectable-fillers
#10
REVIEW
Marc Lefebvre-Vilardebo, Patrick Trevidic, Amir Moradi, Mariano Busso, Allison B Sutton, Vivian W Bucay
BACKGROUND: Cosmetic physicians are more and more frequently asked for hand rejuvenation. They commonly propose the same techniques as for the face. The authors undertook an anatomical study of the hand dorsum to understand the optimal location for an injected filler and to design the safest technique of placement. METHODS: The first part of the study included dissections of 19 fresh cadaveric hands and duplex ultrasounds investigation of 28 healthy hands. A technique of injection specifically designed from anatomical findings was then tested on 8 fresh cadaveric hands using magnetic resonance imaging and dissection in comparison with 3 other commonly used techniques of rejuvenating injections...
November 2015: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/26430622/development-of-facial-rejuvenation-procedures-thirty-years-of-clinical-experience-with-face-lifts
#11
REVIEW
Byung Jun Kim, Jun Ho Choi, Yoonho Lee
Facial rejuvenation procedures can be roughly divided into face lift surgery and nonoperative, less invasive procedures, such as fat grafts, fillers, botulinum toxin injections, thread lifts, or laserbrasion. Face lift surgery or rhytidectomy is the procedure most directly associated with rejuvenation, due to its fundamental ability to restore the anatomical changes caused by aging. Various methods of face lift surgery have been developed over the last hundred years, thanks to advances in the understanding of facial anatomy and the mechanisms of aging, as well as the dedication of innovative surgeons...
September 2015: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/26384622/specificity-of-facelift-surgery-including-mid-facelift-in-case-of-facial-palsy
#12
C Le Louarn
The asymmetry created by the facial palsy is of course a cause of demand for facelift surgery. As this lifting action is specific and different from the standard procedures, 3 zones of analysis are proposed: first the frontal and temporal areas with the direct eyebrow lift, second the neck and jawline with action on the depressor anguli oris for the non-paralyzed side and the anterior sub SMAS dissection and third the midface. A new and more simple technique of concentric malar lift is proposed. The first publication on concentric malar lift was made 11years ago...
October 2015: Annales de Chirurgie Plastique et Esthétique
https://www.readbyqxmd.com/read/26377507/the-mechanics-of-tessellations-bioinspired-strategies-for-fracture-resistance
#13
REVIEW
Peter Fratzl, Otmar Kolednik, F Dieter Fischer, Mason N Dean
Faced with a comparatively limited palette of minerals and organic polymers as building materials, evolution has arrived repeatedly on structural solutions that rely on clever geometric arrangements to avoid mechanical trade-offs in stiffness, strength and flexibility. In this tutorial review, we highlight the concept of tessellation, a structural motif that involves periodic soft and hard elements arranged in series and that appears in a vast array of invertebrate and vertebrate animal biomaterials. We start from basic mechanics principles on the effects of material heterogeneities in hypothetical structures, to derive common concepts from a diversity of natural examples of one-, two- and three-dimensional tilings/layerings...
January 21, 2016: Chemical Society Reviews
https://www.readbyqxmd.com/read/26370942/outer-membrane-lipoprotein-biogenesis-lol-is-not-the-end
#14
REVIEW
Anna Konovalova, Thomas J Silhavy
Bacterial lipoproteins are lipid-anchored proteins that contain acyl groups covalently attached to the N-terminal cysteine residue of the mature protein. Lipoproteins are synthesized in precursor form with an N-terminal signal sequence (SS) that targets translocation across the cytoplasmic or inner membrane (IM). Lipid modification and SS processing take place at the periplasmic face of the IM. Outer membrane (OM) lipoproteins take the localization of lipoproteins (Lol) export pathway, which ends with the insertion of the N-terminal lipid moiety into the inner leaflet of the OM...
October 5, 2015: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/26364915/click-addition-of-a-dna-thread-to-the-n-termini-of-peptides-for-their-translocation-through-solid-state-nanopores
#15
Sudipta Biswas, Weisi Song, Chad Borges, Stuart Lindsay, Peiming Zhang
Foremost among the challenges facing single molecule sequencing of proteins by nanopores is the lack of a universal method for driving proteins or peptides into nanopores. In contrast to nucleic acids, the backbones of which are uniformly negatively charged nucleotides, proteins carry positive, negative and neutral side chains that are randomly distributed. Recombinant proteins carrying a negatively charged oligonucleotide or polypeptide at the C-termini can be translocated through a α-hemolysin (α-HL) nanopore, but the required genetic engineering limits the generality of these approaches...
October 27, 2015: ACS Nano
https://www.readbyqxmd.com/read/26272195/pattern-of-online-communication-in-teaching-a-blended-oral-surgery-course
#16
H F Marei, K S Al-Khalifa
AIM: To explore the factors that might affect the patterns of interaction amongst dental students that can be found in asynchronous online discussion fora. SUBJECTS AND METHODS: It is a qualitative study that involved the participation of 71 dental students (42 male and 29 female) who belong to one academic year. Students were participated in asynchronous online discussion fora as a part of a blended oral surgery course that involved both face-to-face lecture and an online learning environment using the Blackboard learning management system...
August 14, 2015: European Journal of Dental Education: Official Journal of the Association for Dental Education in Europe
https://www.readbyqxmd.com/read/26242955/expectant-fathers-abortion-and-embryos
#17
Dara E Purvis
One thread of abortion criticism, arguing that gender equality requires that men be allowed to terminate legal parental status and obligations, has reinforced the stereotype of men as uninterested in fatherhood. As courts facing disputes over stored pre-embryos weigh the equities of allowing implantation of the pre-embryos, this same gender stereotype has been increasingly incorporated into a legal balancing test, leading to troubling implications for ART and family law.
2015: Journal of Law, Medicine & Ethics: a Journal of the American Society of Law, Medicine & Ethics
https://www.readbyqxmd.com/read/26177157/complications-associated-with-cutaneous-aesthetic-procedures
#18
REVIEW
Daniela Hartmann, Thomas Ruzicka, Gerd G Gauglitz
In recent years, a plethora of novel therapeutic approaches to fight signs of aging and to influence external body appearance have become available in aesthetic dermatology. Extensive research in this field has led to advanced understanding of the anatomy and physiology of the aging face. To successfully address the complex age-related alterations anti-aging treatment nowadays calls for a multi-faceted approach. Most frequently utilized aesthetic procedures include the use of botulinum toxin, a variety of filling substances, microneedling (collagen induction therapy), chemical peeling, lasers, radiofrequency, thread facelift and injectional lipolysis with phosphatidylcholine/deoxycholate among others...
August 2015: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/26106947/threading-the-needle-how-to-stop-the-hiv-outbreak-in-rural-indiana
#19
Steffanie A Strathdee, Chris Beyrer
Many observers were surprised when Indiana Governor Mike Pence issued an executive order on March 26, 2015, declaring a public health emergency after a rapidly escalating outbreak of human immunodeficiency virus (HIV) was identified in Scott County, a rural region on the Kentucky border. Others,..
July 30, 2015: New England Journal of Medicine
https://www.readbyqxmd.com/read/26094362/management-of-a-dental-implant-with-internal-thread-damage-a-patient-treatment-report
#20
Barry S Rubel, Edward E Hill
When a patient presents with an implant with the internal threads damaged (or cross-threaded), a definitive restorative challenge may be faced. By having a difference in hardness between an abutment screw and the implant to which it is to be attached, there is potential for internal thread damage to the implant if the opposing threads do not interface properly. As such, the operator must use care when positioning the abutment and engaging the threads to prevent possible misalignment and damage to the internal aspect of the implant body...
April 2015: New York State Dental Journal
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