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https://www.readbyqxmd.com/read/29786663/modeling-the-effect-of-primary-and-secondary-twinning-on-texture-evolution-during-severe-plastic-deformation-of-a-twinning-induced-plasticity-steel
#1
Laszlo S Toth, Christian Haase, Robert Allen, Rimma Lapovok, Dmitri A Molodov, Mohammed Cherkaoui, Haitham El Kadiri
Modeling the effect of deformation twinning and the ensuing twin-twin- and slip-twin-induced hardening is a long-standing problem in computational mechanical metallurgy of materials that deform by both slip and twinning. In this work, we address this effect using the twin volume transfer method, which obviates the need of any cumbersome criterion for twin variant selection. Additionally, this method is capable of capturing, at the same time, secondary or double twinning, which is particularly important for modeling in large strain regimes...
May 22, 2018: Materials
https://www.readbyqxmd.com/read/29786579/operative-treatment-of-corrosive-esophageal-strictures
#2
Volodymyr O Shaprynskyi, Yevhen V Shaprynskyi, Yaroslav V Karyi, Serhii A Lysenko, Oleg O Vorovskyi, Andrii I Semenenko
OBJECTIVE: Introduction: Nowadays operative treatment of corrosive esophageal strictures remains one of the difficult and unsolved problems in surgery. The level of postoperative complications such as anastomotic leak (develops in 7-30% of cases), infections, pneumonia, pleural empyema, mediastinitis, peritonitis, postoperative corrosive strictures is still rather high. The aim of our work was to improve the results of surgical treatment of patients with corrosive esophageal strictures by analyzing and refining on conservative therapy options as well as differentiated approach to each operative treatment method...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29786549/pluripotent-stem-cells-induction-and-self-renewal
#3
REVIEW
R Abu-Dawud, N Graffmann, S Ferber, W Wruck, J Adjaye
Pluripotent stem cells (PSCs) lie at the heart of modern regenerative medicine due to their properties of unlimited self-renewal in vitro and their ability to differentiate into cell types representative of the three embryonic germ layers-mesoderm, ectoderm and endoderm. The derivation of induced PSCs bypasses ethical concerns associated with the use of human embryonic stem cells and also enables personalized cell-based therapies. To exploit their regenerative potential, it is essential to have a firm understanding of the molecular processes associated with their induction from somatic cells...
July 5, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29786432/modular-design-of-fluorescent-dibenzo-and-naphtho-fluoranthenes-structural-rearrangements-and-electronic-properties
#4
Gavin S Mohammad-Pour, Richard T Ly, David C Fairchild, Alex Burnstine-Townley, Demetrius A Vazquez-Molina, Khang D Trieu, Andres D Campiglia, James K Harper, Fernando J Uribe-Romo
A library of twelve dibenzo- and naphtho- fluoranthene polycyclic aromatic hydrocarbons (PAHs) with MW = 302 (C24H14) was synthesized via a Pd-catalyzed fluoranthene ring-closing reaction. By understanding the various modes by which the palladium migrates during the transformation, structural rearrangements were bypassed, obtaining pure PAHs in high yields. Spectroscopic and electrochemical characterization demonstrated the profound diversity in the electronic structures between isomers. Highlighting the significant differences in emission of visible light, this library of PAHs will enable their standardization for toxicological assessment and potential use as optoelectronic materials...
May 22, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29785544/heartmate-ii-implantation-technique-that-spares-the-sternum-and-ascending-aorta
#5
Masashi Kawabori, Chitaru Kurihara, Tadahisa Sugiura, Andrew B Civitello, Jeffrey A Morgan
Left ventricular assist devices (LVADs) have become the standard therapy for patients with end-stage heart failure, and the use of LVADs for long-term support has grown exponentially over the past decade. As the number of LVAD implantations has increased, surgeons have faced more challenging cases, such as those in which the patient has previously undergone a sternotomy. The HeartMate II is one of the most widely implanted LVADs. The standard procedure for HeartMate II implantation is median sternotomy and sewing the outflow graft to the ascending aorta...
May 21, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29785339/identification-of-potential-crucial-genes-and-pathways-associated-with-vein-graft-restenosis-based-on-gene-expression-analysis-in-experimental-rabbits
#6
Qiang Liu, Xiujie Yin, Mingzhu Li, Li Wan, Liqiao Liu, Xiang Zhong, Zhuoqi Liu, Qun Wang
Occlusive artery disease (CAD) is the leading cause of death worldwide. Bypass graft surgery remains the most prevalently performed treatment for occlusive arterial disease, and veins are the most frequently used conduits for surgical revascularization. However, the clinical efficacy of bypass graft surgery is highly affected by the long-term potency rates of vein grafts, and no optimal treatments are available for the prevention of vein graft restenosis (VGR) at present. Hence, there is an urgent need to improve our understanding of the molecular mechanisms involved in mediating VGR...
2018: PeerJ
https://www.readbyqxmd.com/read/29785211/a-very-rare-cause-of-lower-limb-ischemia-in-young-people-popliteal-artery-entrapment
#7
Hasan Baki Altinsoy, Ozkan Alatas, Emjed Khalil, Kenan Abdurrahman Kara, Candan Cudi Okten, Omer Faruk Dogan
Background: Popliteal artery entrapment syndrome (PAES) is a very rare pathology that can cause lower extremity ischemia in healthy young people. Anomalous anatomic relationships between the popliteal artery (PA) and the surrounding musculo-tendinous structures cause PAES. We present 31 patients with PAES in 35 limbs that were treated surgically in our clinic within a 12-year period. Patients and Methods: From 2001 to 2015, 31 patients (mean age: 32 ± 7.4 years) underwent surgery for PAES...
2018: Open Cardiovascular Medicine Journal
https://www.readbyqxmd.com/read/29784901/symptomatic-total-aortic-occlusion
#8
Bogdan Dutu, Dumitru Zdrenghea, Dana Pop, Gabriel Cismaru, Alexandru Martis, Adrian C Iancu
BACKGROUND Aortic occlusion, whether acute or subacute, is a rare but very serious entity with disastrous consequences if not treated in a timely fashion. Rapid diagnosis is crucial in this setting. In surgically treated patients there is a high degree of mortality and morbidity; therefore, percutaneous revascularization, whenever possible and independent of the available techniques, is much more desirable. CASE REPORT A 62-year-old woman with a history of diabetes mellitus, dyslipidemia, hypertension, and peripheral vascular disease, with previous femoral-femoral bypass for right common iliac artery occlusion, and with recent conventional angiography showing near occlusion of the ostial left common iliac artery (the donor vessel for the previous bypass), was referred to our hospital for conventional angioplasty...
May 22, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29784885/-pseudomonas-aeruginosa-regulated-intramembrane-proteolysis-rip-protease-mucp-can-overcome-mutations-in-the-algo-periplasmic-protease-to-restore-alginate-production-in-nonmucoid-revertants
#9
Camila Delgado, Laura Florez, Ivonne Lollett, Christine Lopez, Shiva Kangeyan, Hansi Kumari, Marios Stylianou, Robert J Smiddy, Lisa Schneper, Robert T Sautter, George Szatmari, Kalai Mathee
The progression of cystic fibrosis (CF) from an acute to a chronic disease is often associated with the conversion of the opportunistic pathogen Pseudomonas aeruginosa from a nonmucoid form to a mucoid form in the lung. This conversion involves the overproduction of the exopolysaccharide alginate, whose production is under control of the AlgT/U sigma factor. This factor is regulated posttranslationally by an extremely unstable process and has been commonly attributed to mutations in the algT/U gene. By exploiting this unstable phenotype, we isolated 34 spontaneous nonmucoid variants arising from the mucoid strain PDO300, a PAO1 derivative containing the mucA22 allele commonly found in mucoid CF isolates...
May 21, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29784120/open-surgical-management-of-deep-venous-occlusive-disease
#10
Misaki M Kiguchi, Steven D Abramowitz
Endovascular techniques have revolutionized the management of deep venous occlusive disease. Open surgery, however, is still required for cases that prove refractory to endovascular interventions. The surgical management of deep venous occlusive disease typically involves venous bypass. Preoperative planning before open venous surgery relies upon dynamic imaging to clarify the location and severity of venous obstruction, the assessment of infrainguinal reflux, and the delineation of bypass origination and target vessels...
June 2018: Techniques in Vascular and Interventional Radiology
https://www.readbyqxmd.com/read/29783031/a-unique-all-payer-rate-setting-system-controls-the-cost-but-not-the-racial-disparity-in-lower-extremity-revascularization-procedures
#11
Besma Nejim, Robert J Beaulieu, Husain Alshaikh, Mohammed Hamouda, Joseph Canner, Mahmoud B Malas
BACKGROUND: Patients with peripheral arterial disease (PAD) often have high comorbidity burden that may complicate post-interventional course and drive increased healthcare expenditures. Racial disparity had been observed in lower extremity revascularization (LER) patterns and outcomes. In 2014, Maryland adopted an all-payer rate setting system to limit the rising hospitalization costs. This resulted in an aggregate payment system in which hospital compensation takes place as an overall per capita expenditure for hospital services...
May 18, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29783030/venous-conduits-have-superior-patency-compared-to-prosthetic-grafts-for-femoro-femoral-bypass
#12
Khanh Nguyen, Gregory Moneta, Gregory Landry
OBJECTIVE: To compare outcomes of externally supported polytetrafluoroethylene (PTFE) grafts and femoral vein as conduits for femoro-femoral crossover grafts. METHODS: This is a retrospective review of consecutive femoro-femoral crossover grafts at our institution between January 2005 and March 2016. Patient demographics, indications, complication rates, patency rates and survival rates were compared between femoro-femoral grafts created with either PTFE or femoral vein conduits, autogenous or cryopreserved...
May 18, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29782430/novel-technique-of-distal-roux-en-y-gastric-bypass-for-insufficient-weight-loss-after-primary-procedure-personal-experience-and-primary-results-at-12-months
#13
Theodoros Thomopoulos, Vincent Tomasi, Evangelos Koliakos, Maximilien Thoma, Benoit Navez
PURPOSE: In the literature, up to 20% of patients present a failure of weight loss after primary Roux-en-Y gastric bypass (RYGBP) or other restrictive procedures. Our aim is to describe the midterm results of our novel technique of distal Roux-en-Y gastric bypass (DRYGBP) as a revisional procedure. MATERIALS AND METHODS: We performed our DRYGBP in 30 patients. The length of the common channel was 100 cm, whereas the lengths of the alimentary and the biliopancreatic limbs were 2/3 and 1/3 of the remaining bowel, respectively...
May 18, 2018: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/29782264/-the-case-of-successful-surgical-treatment-of-a-patient-with-thoracic-endograft-infection-in-5-years-after-thoracic-endovascular-aortic-repair
#14
V A Popov, A N Korostelev, E S Malyshenko, A S Revishvili
We present here a case of successful staged treatment of a patient with para-aortic abscess that arose 5 years after thoracic endovascular aortic repair because of thoracic aortic aneurysm. After stabilization of the patient's condition by intensive antibiotic therapy we performed left-subclavian extra-thoracic debranching as the first stage of the surgical treatment. In 2 weeks via median sternotomy and on-pump we removed the infected endograft and performed extraanatomical ascending-to-descending aortic bypass with good postoperative result...
April 2018: Kardiologiia
https://www.readbyqxmd.com/read/29782009/construction-of-synthetic-phage-displayed-fab-library-with-tailored-diversity
#15
Ganggang Huang, Zhenwei Zhong, Shane Miersch, Sachdev S Sidhu, Shin-Chen Hou, Donghui Wu
Demand for monoclonal antibodies (mAbs) in basic research and medicine is increasing yearly. Hybridoma technology has been the dominant method for mAb development since its first report in 1975. As an alternative technology, phage display methods for mAb development are increasingly attractive since Humira, the first phage-derived antibody and one of the best-selling mAbs, was approved for clinical treatment of rheumatoid arthritis in 2002. As a non-animal based mAb development technology, phage display bypasses antigen immunogenicity, humanization, and animal maintenance that are required from traditional hybridoma technology based antibody development...
May 1, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29781776/empathy-present-and-future
#16
Judith Hall, Rachel Schwartz
The empathy concept has central significance for social and personality psychology, and in many other domains including neuroscience, clinical/abnormal psychology, and the health professions. However, the current diversity in conceptual and operational definitions, and the promiscuous use of the term "empathy," threaten the ability of researchers to advance the field. The present article provides a quantitative review and conceptual analysis of empathy definitions and usages by examining 393 studies published between 2001 and 2013, and 96 studies published in 2017...
May 21, 2018: Journal of Social Psychology
https://www.readbyqxmd.com/read/29781101/feline-ureteral-obstructions-part-2-surgical-management
#17
REVIEW
D L Clarke
Feline obstructive ureteral disease will likely remain a common and frustrating cause of critical illness in cats for the foreseeable future. Since many cats are uraemic and cardiovascularly unstable secondary to obstructive nephropathy, prompt recognition using clinical intuition, blood work and diagnostic imaging is essential to make a timely diagnosis and decision about timing for intervention, if indicated. Multiple surgical and interventional procedures exist for the management of feline ureteral obstructions but there is no ideal technique and all currently available procedures carry risk of infection, re-obstruction, urine leakage and the need for additional procedures in the future...
May 20, 2018: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/29781070/antiplatelet-therapy-for-patients-undergoing-coronary-artery-bypass-surgery
#18
Christine M DeStephan, David J Schneider
Considerable variation in the use and duration of antiplatelet medications during the perioperative and postoperative care of patients undergoing coronary artery bypass grafting (CABG) reflects limited studies focused directly on these patients as well as variation in the results reported. In this review we will highlight the incidence and mechanisms of graft closure as well as the evidence in support of antiplatelet therapy that is balanced by the impact of antiplatelet therapy on the risk of bleeding to provide recommendations for the use of antiplatelet therapy in patients undergoing CABG...
May 21, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29781038/downregulation-of-lncrna-malat1-contributes-to-renal-functional-improvement-after-duodenal-jejunal-bypass-in-a-diabetic-rat-model
#19
Dong Wu, Yu-Gang Cheng, Xin Huang, Ming-Wei Zhong, Shao-Zhuang Liu, San-Yuan Hu
Ameliorated renal function has been reported after bariatric surgery, but the mechanisms underlying this phenomenon are not well-studied. To investigate whether the long non-coding RNA (lncRNA) MALAT1 mediates the amelioration of diabetic nephropathy after duodenal-jejunal bypass (DJB) surgery, rats were assigned randomly into four groups: diabetic (DM) group, DM with DJB surgery group, DM with sham surgery group, and healthy control group. Food intake, body weight, oral glucose tolerance test (OGTT), urine albumin excretion rate (UAER), and glomerular filtration rate (GFR) were measured and histological examination of renal sections was performed...
May 21, 2018: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29780857/multi-omic-network-based-interrogation-of-rat-liver-metabolism-following-gastric-bypass-surgery-featuring-swath-proteomics
#20
Gautham Vivek Sridharan, Matthew D'Alessandro, Shyam Sundhar Bale, Vicky Bhagat, Hugo Gagnon, John M Asara, Korkut Uygun, Martin L Yarmush, Nima Saeidi
Morbidly obese patients often elect for Roux-en-Y gastric bypass (RYGB), a form of bariatric surgery that triggers a remarkable 30% reduction in excess body weight and reversal of insulin resistance for those who are type II diabetic. A more complete understanding of the underlying molecular mechanisms that drive the complex metabolic reprogramming post-RYGB could lead to innovative non-invasive therapeutics that mimic the beneficial effects of the surgery, namely weight loss, achievement of glycemic control, or reversal of non-alcoholic steatohepatitis (NASH)...
September 2017: Technology
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