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De Gasperi D, El Azzi MS, Martins JPN, Brounts SH. Ex vivo study shows novel, rapid, suture-free tenotomy technique for the equine deep digital flexor tendon. Am J Vet Res 2024; 85:ajvr.23.09.0215. [PMID: 38109844 DOI: 10.2460/ajvr.23.09.0215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 11/28/2023] [Indexed: 12/20/2023]
Abstract
OBJECTIVE To describe the feasibility of a novel thread-transecting technique for the tenotomy of the equine deep digital flexor tendon (DDFT). ANIMALS 39 equine distal limb specimens. METHODS Under ultrasonographic guidance, a surgical thread was percutaneously placed around the DDFT through 2 needle punctures (lateral and medial) using a Tuohy needle in equine limbs (22 forelimbs, 17 hindlimbs). The DDFT was transected by a back-and-forth motion of the thread until the loop emerged from the entry puncture site. Each specimen was dissected and assessed for completeness of transection and iatrogenic damage under direct visualization. Descriptive statistics were reported. RESULTS Complete DDFT transection was achieved in all 39 limbs, taking an average of 8.6 minutes per procedure. Iatrogenic damage to surrounding structures occurred in 17 (44%) limbs, with 6 (15%) limbs having more than 1 structure damaged. Damage to the communicating branch of the palmar or plantar nerves was the most commonly seen. CLINICAL RELEVANCE DDFT tenotomy in equine limb specimens was effectively performed using a novel thread-transecting technique. The procedure is quick, and no suturing is needed, but damage to surrounding structures is possible. Further assessment of the procedure and clinical significance of its potential iatrogenic damage in clinical cases is needed.
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Affiliation(s)
- Diego De Gasperi
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI
- Department of Large Animal Clinical Sciences, School of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Marcelo S El Azzi
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI
| | - João Paulo N Martins
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI
| | - Sabrina H Brounts
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI
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Barbosa ADP, Espasandin I, Pinheiro de Lima L, de Souza Ribeiro C, Raquel Silva L, Faria Quintal T, Nascimento Lima E, Catarina Duarte Vieira L, Soares TR, Autran Colaço AR. Body Harmonization: The Definition of a New Concept. Clin Cosmet Investig Dermatol 2023; 16:3753-3766. [PMID: 38170132 PMCID: PMC10759920 DOI: 10.2147/ccid.s426813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 10/05/2023] [Indexed: 01/05/2024]
Abstract
Body Harmonization (BHA) is an innovative concept in aesthetics area based on a set of advanced injectable techniques that have shown promising results for body shaping. This is based on procedure combinations indicated to treat body aesthetic dysfunctions, such as localized fat, stretch marks, blemishes, flaccidity, buttocks remodeling, lean mass gain and muscle definition. This study aims to define the clinical concept of BHA, its applications and the main protocols used based on injectable pharmacotherapy. For this purpose, we performed a retrospective review of proven efficient injectable procedures with advanced results for the treatment of body aesthetic disorders, in addition to relying on data obtained from previous clinical experiences. Based on these data, we describe how different compounds can act for treatment of the main body aesthetic dysfunctions, such as lipolytic compounds and collagen biostimulators. In addition, the main application techniques and treatment protocols for each of these dysfunctions were defined. Minimally invasive injectable procedures offer an effective therapeutic option for patients who do not intend to undergo surgical interventions.
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Affiliation(s)
- Antony de Paula Barbosa
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Isabela Espasandin
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Lucas Pinheiro de Lima
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Caroline de Souza Ribeiro
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Lara Raquel Silva
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Thalita Faria Quintal
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Evenny Nascimento Lima
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Láila Catarina Duarte Vieira
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Thaina Ribeiro Soares
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
| | - Anna Raphaella Autran Colaço
- Department of Research & Development, Health & Aesthetics, Antony Barbosa Institute, Belo Horizonte, MG, 30575-210Brazil
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Stančeková D, Turian F, Šajgalík M, Drbúl M, Náprstková N, Rudawská A, Špiriak M. Identification of the Production of Small Holes and Threads Using Progressive Technologies in Austenite Stainless Steel 1.4301. Materials (Basel) 2023; 16:6538. [PMID: 37834676 PMCID: PMC10574282 DOI: 10.3390/ma16196538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 09/21/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023]
Abstract
This article focuses on the technologies used by a manufacturing company to produce threads in chrome-nickel steel 1.4301 at specific sheet thicknesses. To enhance production quality, two specific technologies were chosen for hole formation, considering the requirements of the company. Both conventional drilling and nonconventional laser cutting methods were evaluated as potential techniques for hole production. Conventional thread-cutting technology and progressive forming technology were employed to create metric internal threads. The aim of integrating these diverse technologies is to identify the optimal solution for a specific sheet thickness in order to prevent the occurrence of defective threads that could not fulfil the intended purpose. The evaluation of the threads and holes relies on the examination of surface characteristics, such as the quality of the surface, as well as the lack of any signs of damage, cracks, or burrs. Furthermore, residual stresses in the surface layer were monitored because these stresses have the potential to cause cracking. Additionally, extensive monitoring was performed to guarantee that the form and size of the manufactured threads were correct to ensure smooth assembly and optimal functionality.
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Affiliation(s)
- Dana Stančeková
- Faculty of Mechanical Engineering, University of Zilina, Univerzitná 8215/1, 01026 Žilina, Slovakia; (F.T.); (M.Š.); (M.D.); (M.Š.)
| | - Filip Turian
- Faculty of Mechanical Engineering, University of Zilina, Univerzitná 8215/1, 01026 Žilina, Slovakia; (F.T.); (M.Š.); (M.D.); (M.Š.)
| | - Michal Šajgalík
- Faculty of Mechanical Engineering, University of Zilina, Univerzitná 8215/1, 01026 Žilina, Slovakia; (F.T.); (M.Š.); (M.D.); (M.Š.)
| | - Mário Drbúl
- Faculty of Mechanical Engineering, University of Zilina, Univerzitná 8215/1, 01026 Žilina, Slovakia; (F.T.); (M.Š.); (M.D.); (M.Š.)
| | - Nataša Náprstková
- Faculty of Mechanical Engineering, University J. E. Purkyně in Ústí nad Labem, Pasteurova 3544/1, 400 96 Ústí nad Labem, Czech Republic;
| | - Anna Rudawská
- Faculty of Mechanical Engineering, Lublin University of Technology, 20-618 Lublin, Poland;
| | - Miroslav Špiriak
- Faculty of Mechanical Engineering, University of Zilina, Univerzitná 8215/1, 01026 Žilina, Slovakia; (F.T.); (M.Š.); (M.D.); (M.Š.)
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Sahan A, Karaosmanoglu N, Ozdemir Cetinkaya P. Is it possible to obtain long-lasting results with thread lift in the brow region? Introduction of a new suspension technique and evaluation of 50 patients. J Cosmet Dermatol 2023; 22:1863-1869. [PMID: 36762403 DOI: 10.1111/jocd.15658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/20/2022] [Accepted: 01/17/2023] [Indexed: 02/11/2023]
Abstract
BACKGROUND Eyebrow region is a dynamic region, and it has a thinner skin prone to wrinkles and sagging. Descended brows could be repositioned immediately with fewer complications by the use of the threads. Despite all its advantages, the main drawback of absorbable thread lift is its short duration of lifting effect. AIMS This report aims to describe our thread lift technique we have implemented to counteract the descent of the brows and evaluate our results in 50 patients. PATIENTS/METHODS A retrospective chart review was carried out over a period of 1 year from September 2019 to 2020 for the patients who underwent thread lifting for eyebrows in a private clinic in Ankara. Complications after the procedure, durability of the results, global esthetic improvement scale (GAIS) score, and patient satisfaction survey scores were recorded. RESULTS The study group was composed of 50 female patients with a median age of 34 years. The median duration of the procedure is 15 months. Nine (18%) patients experienced complications related to the procedure including ecchymosis, edema, erythema, skin dimpling, and pain. Three weeks after the procedure, the position of the eyebrows of eight (16%) patients were improved, 18 (36%) patients were much improved, and 24 (48%) patients were very much improved according to GAIS. CONCLUSIONS So far, the most disappointing feature of the threads was the poor long-term sustainability of the outcomes. Our thread lift technique for brows offers a significant improvement in the position of the eyebrows in a short time with decreased downtime. More importantly, it can be possible to improve the longevity of the results with this approach.
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Affiliation(s)
- Ali Sahan
- Dermatology and Venereology, Private Clinic, Ankara, Turkey
| | - Nermin Karaosmanoglu
- Dermatology and Venereology, Ankara Training and Research Hospital, Ankara, Turkey
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Den TQ, Neu TR, Sultana S, Giebel HA, Simon M, Billerbeck S. Distinct glycoconjugate cell surface structures make the pelagic diatom Thalassiosira rotula an attractive habitat for bacteria. J Phycol 2023; 59:309-322. [PMID: 36471567 DOI: 10.1111/jpy.13308] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 11/14/2022] [Indexed: 05/28/2023]
Abstract
Interactions between marine diatoms and bacteria have been studied for decades. However, the visualization of physical interactions between these diatoms and their colonizers is still limited. To enhance our understanding of these specific interactions, a new Thalassiosira rotula isolate from the North Sea (strain 8673) was characterized by scanning electron microscopy and confocal laser scanning microscopy (CLSM) after staining with fluorescently labeled lectins targeting specific glycoconjugates. To investigate defined interactions of this strain with bacteria the new strain was made axenic and co-cultivated with a natural bacterial community and in two- or three-partner consortia with different bacteria of the Roseobacter group, Gammaproteobacteria and Bacteroidetes. The CLSM analysis of the consortia identified six out of 78 different lectins as very suitable to characterize glycoconjugates of T. rotula. The resulting images show that fucose-containing threads were the dominant glycoconjugates secreted by the T. rotula cells but chitin and to a lesser extent other glycoconjugates were also identified. Bacteria attached predominantly to the fucose glycoconjugates. The colonizing bacteria showed various attachment patterns such as adhering to the diatom threads in aggregates only or attaching to both the surfaces and the threads of the diatom. Interestingly the colonization patterns of single bacteria differed strikingly from those of bacterial co-cultures, indicating that interactions between two bacterial species impacted the colonization of the diatom. Our observations help to better understand physical interactions and specific colonization patterns of distinct bacterial mono- and co-cultures with an abundant diatom of costal seas.
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Affiliation(s)
- Tran Quoc Den
- Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Oldenburg, Germany
| | - Thomas R Neu
- Helmholtz Centre for Environmental Research - UFZ, Magdeburg, Germany
| | - Sabiha Sultana
- Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Oldenburg, Germany
| | - Helge-A Giebel
- Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Oldenburg, Germany
| | - Meinhard Simon
- Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Oldenburg, Germany
| | - Sara Billerbeck
- Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Oldenburg, Germany
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Krawczyk B, Szablewski P, Mendak M, Gapiński B, Smak K, Legutko S, Wieczorowski M, Miko E. Surface Topography Description of Threads Made with Turning on Inconel 718 Shafts. Materials (Basel) 2022; 16:80. [PMID: 36614419 PMCID: PMC9821200 DOI: 10.3390/ma16010080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/16/2022] [Accepted: 12/18/2022] [Indexed: 06/17/2023]
Abstract
The technology of producing threads, especially in materials that are difficult to cut, is a rare subject of research and scientific publications. The requirements for the production of these elements apply not only to the geometry, but also to the quality of the surface obtained. This is particularly important in the aviation industry, where the durability of the threaded connection affects passenger safety. Due to the design of the thread, the quality of its surface is assessed visually in industrial practice. The authors of this study decided to examine the surface topography of external threads made by turning on Inconel 718 shafts in order to confirm the visual evaluation, as well as to investigate the influence of such factors as cutting speed, turning direction and type of profile. Three types of contours were cut for the research: triangular, trapezoidal symmetrical and trapezoidal asymmetrical. Turning of each was carried out twice at cutting speeds vc = 17 m/min and vc = 30 m/min. On each of the threads, the side surface of the profile made in the direction of the insert feed and the opposite surface were examined. The surface texture parameters Sa, Sq, Sp, Sv, Sz, Ssk and Sku were determined and compared. It was noticed that the thread surfaces show a tendency to irregular roughness, which was confirmed by the analysis of the Sku and Ssk coefficients. The sides of the contours made in the direction of the insert feed are characterized by a higher roughness in relation to the opposite sides, which may result from high cutting forces and difficulties with chip evacuation. With the cutting speed being considered, lower values of Sa and Sq were obtained for vc = 17 m/min, which differed from the visual assessment, proving its high subjectivity.
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Affiliation(s)
- Bartłomiej Krawczyk
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland
- Pratt & Whitney Kalisz, Elektryczna 4a, 62-800 Kalisz, Poland
| | - Piotr Szablewski
- Pratt & Whitney Kalisz, Elektryczna 4a, 62-800 Kalisz, Poland
- Institute of Gears Research Excellence Center, The President Stanislaw Wojciechowski Calisia Univeristy, Nowy Świat 4, 62-800 Kalisz, Poland
| | - Michał Mendak
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland
- ITA, Poznańska 104, Skórzewo, 60-185 Poznan, Poland
| | - Bartosz Gapiński
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland
| | - Krzysztof Smak
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland
- Pratt & Whitney Kalisz, Elektryczna 4a, 62-800 Kalisz, Poland
| | - Stanisław Legutko
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland
| | - Michał Wieczorowski
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland
| | - Edward Miko
- Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland
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Píška M, Sliwková P, Vnuková Z, Petrenec M, Sedláková-Valášková E. Exquisite Energy Savings at Cold Metal Forming of Threads through the Application of Polymers. Polymers (Basel) 2022; 14:polym14061084. [PMID: 35335414 PMCID: PMC8950108 DOI: 10.3390/polym14061084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 12/04/2022] Open
Abstract
One of the global problems today is energy—its production and distribution. As the human population grows, the consumption of energy rises simultaneously. However, the natural sources are limited, and so the focus on power savings becomes more and more important. One of the ways to reduce consumption is the use of effective lubricants and tribological fluids in industry, especially in processes with high demands on energy but high quality of products as well. Forming is a typical example of such technology, and the application of polymers seems to be a very important challenge, because the application of straight oils or lubricant with extreme pressure additives seems to be prevailing in that field. Nevertheless, the polymer lubricant should fulfill all European standards as well as the environmental and ecological limitations with respect to health and the natural environment and its recycling and disposal. This paper is focused on the forming technology of threads and the application of selected polymers to the forming process. The measured and quantified criteria are torque and force loadings, energy consumption, and quality of the produced surfaces. Kistler dynamometers, scanning electron microscopy, and advanced surface topography with the use of Alicona IF-G5 were applied to assess all aspects of the tribological and energy aspects of six modern process fluids, three lubricating pastes, and two fluid modifications. The results show that the polymer synthetic lubricant (at volume concentration 20% in water) can reduce the total energy consumption by up to 40% per forming cycle (in mean values) at average surface roughness below 0.8 μm.
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Abstract
Medical textiles, such as gowns, scrubs, and even disposable uniforms, are all stitched by sewing machines. These garments are mostly made from polypropylene (PP) and polyester due to their durability, antibacterial performance, and functionality. Demand for these garments has significantly risen in the last few years, and sewing machines are able to stitch at extremely high speeds. However, higher sewing speeds can cause burnt spots on the fabric, lower seam strength, and a decrease in production due to thread breakage. In this paper, I have deeply discussed how medical textiles lose their strength and functionality due to higher sewing speeds; this problem is often neglected due to high production demands. This research is based on PP medical gowns, stitched with polyester (PET) threads, sewn at different speeds. The experimental work is also followed by a theoretical explanation of needle heating during the stitching of medical textiles.
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Affiliation(s)
- Adnan Mazari
- Department of Clothing, Technical University of Liberec, Studenstksa 2 Husova, 46117 Liberec, Czech Republic
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Addevico F, Solitro GF, Morandi MM. Salvaging Pull-Out Strength in a Previously Stripped Screw Site: A Comparison of Three Rescue Techniques. J Funct Morphol Kinesiol 2021; 6:jfmk6030071. [PMID: 34564190 PMCID: PMC8482251 DOI: 10.3390/jfmk6030071] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/21/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022] Open
Abstract
Screw stripping during bone fixation is a common occurrence during operations that results in decreased holding capacity and bone healing. We aimed to evaluate the rescue of the stripped screw site using screws of different dimensions. Five screw configurations were tested on cadaveric specimens for pull-out strength (POS). The configurations included a control screw tightened without stripping, a configuration voluntarily stripped and left in place, and three more configurations in which the stripped screws were replaced by a different screw with either increased overall length, diameter, or thread length. Each configuration was tested five times, with each screw tested once. The POS of the control screw, measured to be 153.6 ± 27 N, was higher than the POS measured after stripping and leaving the screw in place (57.1 ± 18 N, p = 0.001). The replacement of the stripped screw resulted in a POS of 158.4 ± 64 N for the screw of larger diameter, while the screws of the same diameter but increased length or those with extended thread length yielded POS values of 138.4 ± 42 and 185.7 ± 48 N, respectively. Screw stripping is a frequent intraoperative complication that, according to our findings, cannot be addressed by leaving the screw in place. The holding capacity of a stripped screw implanted in cancellous bone can successfully be restored with a different screw of either larger diameter, longer length, or extended thread length.
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Affiliation(s)
- Francesco Addevico
- Department of Orthopedic and Traumatology, Niguarda Hospital, 20162 Milano, Italy
- Correspondence:
| | - Giovanni F. Solitro
- Department of Orthopaedic Surgery, Louisiana State University Health-Shreveport, Shreveport, LA 71103, USA; (G.F.S.); (M.M.M.)
| | - Massimo Max Morandi
- Department of Orthopaedic Surgery, Louisiana State University Health-Shreveport, Shreveport, LA 71103, USA; (G.F.S.); (M.M.M.)
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Abstract
BACKGROUND Blepharochalasis, induced by the aging process, is an important esthetic blemish which can be solved by blepharoplasty, the most performed cosmetic surgical procedure in the world today to repair droopy eyelids. Nowadays, there is a greater interest to combine blepharoplasty with minimally invasive treatments to harmonize the oval shape of the face. Therefore, blepharoplasty technique could be associated with face thread lifting, a safe and effective technique that optimizes the rejuvenation of the central and lower part of the face. AIM The aim of this study was to assess the overall safety and efficacy of blepharoplasty combined with suspension thread lifting. The author also aimed to demonstrate patients' satisfaction after treatment. METHOD The study involved 12 patients undergoing blepharoplasty plus threads lifting to improve the mandibular line. Patient's satisfaction was valuated with global esthetic improvement score, visual analog scale score, before and after treatment clinical images. RESULTS All patients showed optimized face rejuvenation and high satisfaction. Patients experienced an immediate improvement in face harmony in addition to the eye refinement and expressed their satisfaction. The combination of plastic surgery and minimal invasive technique did not cause adverse events to the patients and they would recommend it. CONCLUSION Interest in thread lifting is currently high, and this study highlights the excellent outcome and the visible results of blepharoplasty and threads combination.
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Affiliation(s)
- Daniele Bollero
- Department of Plastic Surgery, Burn Center, CTO Hospital, Turin, Italy
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Vogt B, Chokri I. Characterization of Sonic Hedgehog/Gli1 Signal Expression in Human Ureter Either Un-Stented or Fitted with Double-Pigtail Stent or a Thread. Res Rep Urol 2021; 13:529-533. [PMID: 34345615 PMCID: PMC8324979 DOI: 10.2147/rru.s324192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 07/21/2021] [Indexed: 12/02/2022] Open
Abstract
Introduction The Sonic Hedgehog/Gli1 signal is involved in smooth muscle activity. An experiment showed that the double-pigtail stent caused ureteral inflammation and decreased Gli1 expression in smooth muscle cells. The innovative pigtail-suture stent (JFil® or MiniJFil®) with a thin 0.3F suture thread significantly decreased stent-related symptoms. Fortuitously, a dilation of the ureter containing the sutures was discovered, and a previous study confirmed that the sutures caused less ureteral inflammation than the double-pigtail stent. However, the mechanisms involved in the ureteral dilation are still unknown. In this study, we assessed ureteral Gli1 expression in the human ureter when it was un-stunted or when fitted with a double-pigtail stent or a suture thread. Material and Methods After consent and inclusion of patients in the protocol, nine segments of ureters were collected during cystectomy procedures for bladder cancers. There was no selection or exclusion, and patients with large tumors were included. Gli1 expression was assessed on the histological section to control the reflection of an active hedgehog signal. The expression of Gli1 in smooth muscle cells of the stented ureter was subjectively compared to un-stented ureter. Results A decrease in the intensity of Gli1 expression of smooth muscle cells was observed in all cases of ureter fitted with a double-pigtail stent. For the un-stunted ureters and the ureters fitted with the thin 0.3F suture thread, Gli1 staining of smooth muscle cells was heterogeneous, and the small number of cases did not allow us to conclude. Conclusion Apart from the cases of ureters fitted with the double-pigtail stent, Gli1 expression of smooth muscle was heterogeneous. The Shh/Gli1 pathway may not be involved in ureteral dilation by the thread. A broader exploration of molecular mechanisms could make it possible to obtain the mechanisms involved in the dilation of the ureter by the thread.
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Affiliation(s)
- Benoît Vogt
- Department of Urology, Polyclinique de Blois, La Chaussée Saint-Victor, 41260, France
| | - Ilham Chokri
- Laboratory of Anatomocytopathology, Laboratoire Léonard de Vinci, Chambray-lès-Tours, 37170, France
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Mohammed GF. A Simple method for controlling depth of skin piercing using simple injection needles. J Cosmet Dermatol 2021; 21:337-338. [PMID: 33735511 DOI: 10.1111/jocd.14081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/05/2021] [Accepted: 03/15/2021] [Indexed: 11/30/2022]
Abstract
An 18-gauge disposable needles can be smoothly bent by artery forceps in two alternate 90o angles. By determining the desired depth, we can control depth of penetration, inclination angle of needle entry and prevent accidental deep breakthrough by stopping the needle with the bended shoulder (Fig. 1). Controlling depth can be achieved by cutting the cap to the desired depth, but only for vertical needle entry [3].
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Affiliation(s)
- Ghada F Mohammed
- Dermatology and Venereology department, Faculty of Medicine, Suez Canal University, 41511, Ismailia, Egypt
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Rauf S, Andrés MA, Roubeau O, Gascón I, Serre C, Eddaoudi M, Salama KN. Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique. Nanomaterials (Basel) 2021; 11:E160. [PMID: 33435145 DOI: 10.3390/nano11010160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/05/2021] [Accepted: 01/07/2021] [Indexed: 11/21/2022]
Abstract
The Langmuir-Blodgett (LB) method is a well-known deposition technique for the fabrication of ordered monolayer and multilayer thin films of nanomaterials onto different substrates that plays a critical role in the development of functional devices for various applications. This paper describes detailed studies about the best coating configuration for nanoparticles of a porous metal-organic framework (MOF) onto both insulating or conductive threads and nylon fiber. We design and fabricate customized polymethylmethacrylate sheets (PMMA) holders to deposit MOF layers onto the threads or fiber using the LB technique. Two different orientations, namely, horizontal and vertical, are used to deposit MIL-96(Al) monolayer films onto five different types of threads and nylon fiber. These studies show that LB film formation strongly depends on deposition orientation and the type of threads or fiber. Among all the samples tested, cotton thread and nylon fiber with vertical deposition show more homogenous monolayer coverage. In the case of conductive threads, the MOF particles tend to aggregate between the conductive thread’s fibers instead of forming a continuous monolayer coating. Our results show a significant contribution in terms of MOF monolayer deposition onto single fiber and threads that will contribute to the fabrication of single fiber or thread-based devices in the future.
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Abstract
BACKGROUND/OBJECTIVES It is a common Indian custom to tie threads on the hip, neck, or wrist of infants and children. METHODS/RESULTS A retrospective registry review was performed for 23 children (age range 5-18 months) with threads tied around the hip/neck/forearm who presented with dermatitis. Analysis of one of the threads revealed the presence of three banned azo dyes and disperse yellow 3 (category 2B possible carcinogens). CONCLUSION Thread dermatitis is a unique cultural dermatosis. Dermatitis caused by threads may have multifactorial causes including friction, maceration, and contact dermatitis (allergic and/ or irritant) to the thread contents. Use of banned dyes still used to color these threads may be contributory to dermatitis, but there is also concern for health and environmental hazards to children. Strict regulation is needed in the manufacture of these threads to protect the health and welfare of young children.
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Affiliation(s)
- Palaniappan Vijayasankar
- Department of Dermatology, Venereology and Leprosy, Sri Manakula Vinayagar Medical College and Hospital, Pondicherry, India
| | - Hima Gopinath
- Department of Dermatology, All India Institute of Medical Sciences, Mangalagiri, India
| | - Kaliaperumal Karthikeyan
- Department of Dermatology, Venereology and Leprosy, Sri Manakula Vinayagar Medical College and Hospital, Pondicherry, India
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Kamiński M, Borger M, Prymas P, Muth A, Stachowski A, Łoniewski I, Marlicz W. Analysis of Answers to Queries among Anonymous Users with Gastroenterological Problems on an Internet Forum. Int J Environ Res Public Health 2020; 17:ijerph17031042. [PMID: 32041356 PMCID: PMC7037061 DOI: 10.3390/ijerph17031042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/05/2020] [Accepted: 02/05/2020] [Indexed: 12/24/2022]
Abstract
Internet forums are an attractive source of health-related information. We aimed to investigate threads in the gastroenterological section of a popular Polish medical forum for anonymous users. We characterised the following aspects in threads: the main problem of the original poster, declared ailments and rationale of the responses (rational, neutral, harmful or not related to the problem of the original poster). We analysed over 2717 forum threads initiated in the years 2010–2018. Users mostly asked for diagnosis of the problem [1814 (66.8%)], treatment [1056 (38.9%)] and diagnostic interpretation [308 (11.3%)]. The most commonly declared symptoms were abdominal pain [1046 (38.5%)], diarrhea [454 (16.7%)] and bloating [354 (13.0%)]. Alarm symptoms were mentioned in 309 (11.4%) threads. From the total 3550 responses, 1257 (35.4%) were assessed as rational, 693 (19.5%) as neutral, 157 (4.4%) as harmful and 1440 (40.6%) as not related to the user’s problem. The original poster’s declaration of blood in stool, dyspepsia, pain in the abdominal right lower quadrant, weight loss or inflammatory bowel disease was positively related to obtaining at least one potentially harmful response. Advice from anonymous users on Internet forums may be irrational and disregards alarm symptoms, which can delay the diagnosis of life-threatening diseases.
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Affiliation(s)
- Mikołaj Kamiński
- Sanprobi Sp.z o.o. Sp. k., 70-535 Szczecin, Poland
- Correspondence: ; Tel.: +48-516268563
| | - Michał Borger
- Faculty of Medicine I, Poznan University of Medical Sciences, 60-780 Poznań, Poland; (M.B.); (P.P.); (A.M.); (A.S.)
| | - Piotr Prymas
- Faculty of Medicine I, Poznan University of Medical Sciences, 60-780 Poznań, Poland; (M.B.); (P.P.); (A.M.); (A.S.)
| | - Agnieszka Muth
- Faculty of Medicine I, Poznan University of Medical Sciences, 60-780 Poznań, Poland; (M.B.); (P.P.); (A.M.); (A.S.)
| | - Adam Stachowski
- Faculty of Medicine I, Poznan University of Medical Sciences, 60-780 Poznań, Poland; (M.B.); (P.P.); (A.M.); (A.S.)
| | - Igor Łoniewski
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, 70-204 Szczecin, Poland;
| | - Wojciech Marlicz
- Department of Gastroenterology, Pomeranian Medical University, 70-204 Szczecin, Poland;
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Rumaner M, Horowitz L, Ovadya A, Folch A. Thread as a Low-Cost Material for Microfluidic Assays on Intact Tumor Slices. Micromachines (Basel) 2019; 10:mi10070481. [PMID: 31319620 PMCID: PMC6680473 DOI: 10.3390/mi10070481] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 07/13/2019] [Accepted: 07/13/2019] [Indexed: 01/01/2023]
Abstract
In this paper we describe the use of thread as a low-cost material for a microfluidic chemosensitivity assay that uses intact tumor tissue ex vivo. Today, the need for new and effective cancer treatments is greater than ever, but unfortunately, the cost of developing new chemotherapy drugs has never been higher. Implementation of low-cost microfluidic techniques into drug screening devices could potentially mitigate some of the immense cost of drug development. Thread is an ideal material for use in drug screening as it is inexpensive, widely available, and can transport liquid without external pumping hardware, i.e., via capillary action. We have developed an inexpensive microfluidic delivery prototype that uses silk threads to selectively deliver fluids onto subregions of living xenograft tumor slices. Our device can be fabricated completely for less than $0.25 in materials and requires no external equipment to operate. We found that by varying thread materials, we could optimize device characteristics, such as flow rate; we specifically explored the behavior of silk, nylon, cotton, and polyester. The incremental cost of our device is insignificant compared to the tissue culture supplies. The use of thread as a microfluidic material has the potential to produce inexpensive, accessible, and user-friendly devices for drug testing that are especially suited for low-resource settings.
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Affiliation(s)
- Maxwell Rumaner
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, WA 98105, USA.
| | - Lisa Horowitz
- Department of Pathology, University of Washington, 1959 NE Pacific St, Seattle, WA 98195, USA
| | - Avital Ovadya
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, WA 98105, USA
| | - Albert Folch
- Department of Pathology, University of Washington, 1959 NE Pacific St, Seattle, WA 98195, USA
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Visco A, Scolaro C, Giamporcaro A, De Caro S, Tranquillo E, Catauro M. Threads Made with Blended Biopolymers: Mechanical, Physical and Biological Features. Polymers (Basel) 2019; 11:polym11050901. [PMID: 31108907 PMCID: PMC6572296 DOI: 10.3390/polym11050901] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/12/2019] [Accepted: 05/13/2019] [Indexed: 01/19/2023] Open
Abstract
Poly (Lactic Acid), PLA, and Poly (ε-CaproLactone), PCL, compatibilized with Ethyl Ester l-Lysine Triisocyanate (LTI) can be employed as biomaterials. We mixed PLA with PCL and LTI in a twin extruder and by a melt spinning process obtained threads with an average diameter of about 0.3 mm. In order to study the possible application of these threads, mechanical tensile (with the calorimetric and morphological investigations) and biological tests were performed. The results highlighted these biopolymers as promising materials for sutures since they can be rigid and elastic (especially by increasing the PCL amount in the blend), and they are bioactive, able to inhibit bacterial growth. This paper represents a starting point to optimize the blend composition for biomedical suture application.
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Affiliation(s)
- Annamaria Visco
- Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy.
- Institute for Chemical-Physical Processes CNR ⁻IPCF, Viale Ferdinando Stagno d'Alcontres, 37, 98158 Messina, Italy.
| | - Cristina Scolaro
- Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy.
| | - Alberto Giamporcaro
- Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy.
| | - Salvatore De Caro
- Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy.
| | - Elisabetta Tranquillo
- Department of Engineering, University of Campania Luigi Vanvitelli, VialeAbramo Lincoln 5, 81100 Caserta, Italy.
| | - Michelina Catauro
- Department of Engineering, University of Campania Luigi Vanvitelli, VialeAbramo Lincoln 5, 81100 Caserta, Italy.
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Lee JW, Han DC, Shin HJ, Yeom SH, Ju BK, Lee W. PEDOT:PSS-Based Temperature-Detection Thread for Wearable Devices. Sensors (Basel) 2018; 18:E2996. [PMID: 30205504 DOI: 10.3390/s18092996] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/29/2018] [Accepted: 09/05/2018] [Indexed: 12/04/2022]
Abstract
In this research, we developed a wearable temperature-sensing element by dip dyeing threads in poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) (p-type conducting polymer) solution. The PEDOT:PSS was used to dye the textile and it exhibited negative temperature coefficient characteristics in which the resistance decreases as the temperature increases. The fabricated temperature-detection thread achieved a sensitivity of 167.1 Ω/°C with 99.8% linearity in the temperature range of −50 °C to 80 °C. We anticipate that temperature sensors that apply our technology will be made as stitch- or textile-type for wearable devices, and they will be widely adopted for different applications such as in fitness, leisure, healthcare, medical treatment, infotainment, industry, and military applications, among others.
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Hamada NA, Roman VA, Howell SM, Wilker JJ. Examining Potential Active Tempering of Adhesive Curing by Marine Mussels. Biomimetics (Basel) 2017; 2:biomimetics2030016. [PMID: 31105179 PMCID: PMC6352656 DOI: 10.3390/biomimetics2030016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 08/17/2017] [Accepted: 08/17/2017] [Indexed: 11/16/2022] Open
Abstract
Mussels generate adhesives for staying in place when faced with waves and turbulence of the intertidal zone. Their byssal attachment assembly consists of adhesive plaques connected to the animal by threads. We have noticed that, every now and then, the animals tug on their plaque and threads. This observation had us wondering if the mussels temper or otherwise control catechol chemistry within the byssus in order to manage mechanical properties of the materials. Here, we carried out a study in which the adhesion properties of mussel plaques were compared when left attached to the animals versus detached and exposed only to an aquarium environment. For the most part, detachment from the animal had almost no influence on the mechanical properties on low-energy surfaces. There was a slight, yet significant difference observed with attached versus detached adhesive properties on high energy surfaces. There were significant differences in the area of adhesive deposited by the mussels on a low- versus a high-energy surface. Mussel adhesive plaques appear to be unlike, for example, spider silk, for which pulling on the material is needed for assembly of proteinaceous fibers to manage properties.
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Affiliation(s)
- Natalie A Hamada
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907-2084, USA.
| | - Victor A Roman
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907-2084, USA.
| | - Steven M Howell
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907-2084, USA.
| | - Jonathan J Wilker
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907-2084, USA.
- School of Materials Engineering, Purdue University, 701 West Stadium Avenue, West Lafayette, IN 47907-2045, USA.
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Nilghaz A, Zhang L, Li M, Ballerini DR, Shen W. Understanding thread properties for red blood cell antigen assays: weak ABO blood typing. ACS Appl Mater Interfaces 2014; 6:22209-15. [PMID: 25399507 DOI: 10.1021/am505849e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
"Thread-based microfluidics" research has so far focused on utilizing and manipulating the wicking properties of threads to form controllable microfluidic channels. In this study we aim to understand the separation properties of threads, which are important to their microfluidic detection applications for blood analysis. Confocal microscopy was utilized to investigate the effect of the microscale surface morphologies of fibers on the thread's separation efficiency of red blood cells. We demonstrated the remarkably different separation properties of threads made using silk and cotton fibers. Thread separation properties dominate the clarity of blood typing assays of the ABO groups and some of their weak subgroups (Ax and A3). The microfluidic thread-based analytical devices (μTADs) designed in this work were used to accurately type different blood samples, including 89 normal ABO and 6 weak A subgroups. By selecting thread with the right surface morphology, we were able to build μTADs capable of providing rapid and accurate typing of the weak blood groups with high clarity.
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Affiliation(s)
- Azadeh Nilghaz
- Department of Chemical Engineering, Monash University , Clayton Campus, Victoria 3800, Australia
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Abstract
Recently, there has been growing interest in female genital plastic surgery. To the authors' knowledge, no studies have adopted elastic silicone thread for vaginal rejuvenation. This study introduces clinical experience over 4 years with vaginal rejuvenation using elastic silicone thread to specifically assess the overall patient satisfaction (sexual function and correction of the vaginal width). It is hypothesised that this novel surgical method can improve sexual function. Between 2007-2011, 180 patients underwent vaginal rejuvenation using elastic silicone thread performed by the authors at a single institution. Patients with persistent feeling of a wide vagina and/or a decreased ability to reach orgasm were included. Patients were excluded from the study if they were unavailable for follow-up, or if they had been diagnosed with any gynecologic diseases. To measure the 15 degree of improvement with regard to sexual function, this study adopted the validated system; Female Sexual Function Index (FSFI). 92.8% (167/180) of the patients were satisfied with outcome with regard to feelings of correction of vaginal width. Vaginal rejuvenation using elastic silicone thread significantly improved postoperative outcomes, resulting in improved sexual function, with a focus on improving the FSFI score. This is especially prominent in FSFI orgasm subscore. However, a prospective multicentre study would be beneficial to provide patients with the best possible management.
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Affiliation(s)
- Tae Hwan Park
- Buleun Health Care Center , Incheon , Republic of Korea
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