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https://www.readbyqxmd.com/read/28810123/electrochemical-dissolution-of-iridium-and-iridium-oxide-par-ticles-in-acidic-media-transmission-electron-microscopy-electrochemical-flow-cell-coupled-to-inductively-coupled-plasma-mass-spectrometry-and-x-ray-absorption-spectros-copy-study
#1
Primož Jovanovič, Nejc Hodnik, Francisco Ruiz-Zepeda, Iztok Arcon, Barbara Jozinović, Milena Zorko, Marjan Bele, Martin Šala, Vid Simon Šelih, Samo B Hocevar, Miran Gaberscek
Iridium based particles as the most promising proton exchange membrane electrolyser electrocatalysts were investigated by transmission electron microscopy (TEM), and by coupling of electrochemical flow cell (EFC) with online inductively coupled plasma mass spectrometer (ICP-MS). Additionally, a thin-film rotating disc electrode (RDE), an identical location trans-mission and scanning electron microscopy (IL-TEM and IL-SEM) as well as an X-ray absorption spectroscopy (XAS) studies have been performed. Extremely sensitive online time-and potential-resolved electrochemical dissolution profiles revealed that iridium particles dissolved already well below oxygen evolution reaction (OER) potentials, presumably induced by iridium surface oxidation and reduction processes, also referred to as transient dissolution...
August 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28809100/porous-carbon-materials-based-on-graphdiyne-basis-units-by-the-incorporation-of-the-functional-groups-and-li-atoms-for-superior-co2-capture-and-sequestration
#2
Yong Dang, Wenyue Guo, Lianming Zhao, Houyu Zhu
Graphdiyne family has attracted a high degree of concern, because of its intriguing and promising properties. However, graphdiyne materials reported to date represent only a tiny fraction of the possible combinations. In this work, we demonstrate a computational approach to generate a series of conceivable graphdiyne-based frameworks (GDY-Rs and Li@GDY-Rs) by introducing a variety of functional groups (R = -NH2, -OH, -COOH, and -F) and doping metal (Li) in the molecular building blocks of graphdiyne without restriction of experimental conditions and rapidly screen the best candidates for the application of CO2 capture and sequestration (CCS)...
August 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28807459/rapidly-progressive-atherosclerosis-after-domino-liver-transplantation-from-a-teenage-donor-with-homozygous-familial-hypercholesterolemia
#3
Jessica R Golbus, Linda Farhat, Robert J Fontana, Melvyn Rubenfire
Familial hypercholesterolemia (FH) is an autosomal dominant disorder characterized by impaired clearance of low-density lipoprotein cholesterol. Given limitations in pharmacologic therapy and the significant morbidity and mortality associated with this disease, liver transplantation may be offered to select homozygous FH patients in childhood in an effort to slow progression of atherosclerotic cardiovascular disease. In rare cases, domino liver transplantation can be performed, transplanting the livers of patients with various metabolic disorders into elderly recipients whose projected survival precludes prolonged waiting on the transplant list...
July 22, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28797164/universal-surface-engineering-of-transition-metals-for-superior-electrocatalytic-hydrogen-evolution-in-neutral-water
#4
Bo You, Xuan Liu, Guoxiang Hu, Sheraz Gul, Junko Yano, De-En Jiang, Yujie Sun
The development of low-cost hybrid water splitting-biosynthetic systems that mimic natural photosynthesis to achieve solar-to-chemical conversion is of great promise for future energy demands, but often limited by the kinetically sluggish H2 evolu-tion reaction (HER) on the surface of nonprecious transition metal catalysts in neutral media. It is thus highly desirable to rationally tailor the reaction interface to boost the neutral HER catalytic kinetics. Herein, we report a general surface nitro-gen modification of diverse transition metals (e...
August 10, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28796028/sleeve-fracture-of-the-adult-patella-case-report-and-review-of-the-literature
#5
Linjun Xie, Hong Xu, Lizhi Zhang, Rong Xu, Yingkun Guo
RATIONALE: The patellar fractures are common in adults, but rare in children. As a particular type of patellar fracture, however, sleeve fractures are almost always limited to children in the under 16's group. PATIENT CONCERNS: Herein, we report a rare case of a 19-year-old healthy adult female who presented sleeve fracture at the superior pole of the left patella. The clinical and radiological features are found including joint effusion, anterior tilt of the patella and a shell of bone lying proximally to the patella...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28795042/ectopic-cervical-thymoma-a-case-report-and-review
#6
Hyun Oh Park, Sung Hwan Kim, Seong Ho Moon, Jun Ho Yang, Dong Hoon Kang, Jeong Hee Lee
In the embryo, the thymus originates from the third and fourth pharyngeal pouches and migrates from the superior neck to the mediastinum. Ectopic cervical thymoma (ECT) is an extremely rare tumor that originates from ectopic tissue, and is caused by the aberrant migration of the embryonic thymus. Our patient was a 30-year-old woman who had a nodular lesion in the neck for several years. Ultrasonography and computed tomography were performed. She underwent surgery, and a histological examination resulted in a diagnosis of type AB thymoma...
August 2017: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28793899/enumeration-of-circulating-endothelial-cell-frequency-as-a-diagnostic-marker-in-aortic-valve-surgery-a-flow-cytometric-approach
#7
Anton Sabashnikov, Klaus Neef, Vera Chesnokova, Leonie Wegener, Kathrin Godthardt, Maximilian Scherner, Elmar W Kuhn, Antje-Christin Deppe, Meike Lauer, Kaveh Eghbalzadeh, Mohamed Zeriouh, Parwis B Rahmanian, Jens Wippermann, Ferdinand Kuhn-Régnier, Navid Madershahian, Thorsten Wahlers, Alexander Weymann, Yeong-Hoon Choi
BACKGROUND: The frequency of circulating endothelial cells (CEC) in patients' peripheral blood can be assessed as a direct marker of endothelial damage. However, conventional enumeration methods are extremely challenging. We developed a novel, automated approach to determine CEC frequencies and tested this method on two groups of patients undergoing conventional (CAVR) versus trans-catheter aortic valve implantation (TAVI). METHODS: CEC frequencies were assessed by a flow cytometric approach, including automated pre-enrichment of CD34 positive blood cell subpopulation and isotype controls...
August 9, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28791022/enhancing-stability-of-camelid-and-shark-single-domain-antibodies-an-overview
#8
REVIEW
Ellen R Goldman, Jinny L Liu, Dan Zabetakis, George P Anderson
Single domain antibodies (sdAbs) are gaining a reputation as superior recognition elements as they combine the advantages of the specificity and affinity found in conventional antibodies with high stability and solubility. Melting temperatures (Tms) of sdAbs cover a wide range from below 50 to over 80°C. Many sdAbs have been engineered to increase their Tm, making them stable until exposed to extreme temperatures. SdAbs derived from the variable heavy chains of camelid and shark heavy chain-only antibodies are termed VHH and VNAR, respectively, and generally exhibit some ability to refold and bind antigen after heat denaturation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28790028/staged-retroperitoneal-mesenteric-revascularisation-and-aortobifemoral-bypass-after-endovascular-rescue-for-acute-mesenteric-ischaemia
#9
Shepard Peir Johnson, Melani Lighter, Harry Linne Anderson, Abdulhameed Aziz
Visceral artery revascularisation through a retroperitoneal approach provides an infrequent yet viable, alternative means of managing mesenteric ischaemia in patients with previous abdominal operations. We present a unique case implementing this surgical approach in a 55-year-old man in which we performed a retroperitoneal aortobifemoral bypass with concomitant retrograde jump graft from the aortic prosthesis to the superior mesenteric artery (SMA) for bilateral lower extremity rest pain and chronic mesenteric ischaemia...
August 8, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28789677/cold-adaptation-aging-and-korean-women-divers-haenyeo
#10
REVIEW
Joo-Young Lee, Joonhee Park, Siyeon Kim
BACKGROUND: We have been studying the thermoregulatory responses of Korean breath-hold women divers, called haenyeo, in terms of aging and cold adaptation. During the 1960s to the 1980s, haenyeos received attention from environmental physiologists due to their unique ability to endure cold water while wearing only a thin cotton bathing suit. However, their overall cold-adaptive traits have disappeared since they began to wear wetsuits and research has waned since the 1980s. For social and economic reasons, the number of haenyeos rapidly decreased to 4005 in 2015 from 14,143 in 1970 and the average age of haenyeos is about 75 years old at present...
August 8, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28783633/towards-optimal-manifold-hashing-via-discrete-locally-linear-embedding
#11
Rongrong Ji, Hong Liu, Liujuan Cao, Di Liu, Yongjian Wu, Feiyue Huang
Binary code learning, a.k.a. hashing, has received increasing attention in large-scale visual search. By transforming high-dimensional features to binary codes, the original Euclidean distance is approximated via Hamming distance. More recently, it is advocated that it is the manifold distance, rather than the Euclidean distance, that should be preserved in the Hamming space. However, it retains as an open problem to directly preserve the manifold structure by hashing. In particular, it needs first to build the local linear embedding in the original feature space, and then quantize such embedding to binary codes...
August 2, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28772906/a-comparison-study-of-machine-learning-based-algorithms-for-fatigue-crack-growth-calculation
#12
Hongxun Wang, Weifang Zhang, Fuqiang Sun, Wei Zhang
The relationships between the fatigue crack growth rate ( d a / d N ) and stress intensity factor range ( Δ K ) are not always linear even in the Paris region. The stress ratio effects on fatigue crack growth rate are diverse in different materials. However, most existing fatigue crack growth models cannot handle these nonlinearities appropriately. The machine learning method provides a flexible approach to the modeling of fatigue crack growth because of its excellent nonlinear approximation and multivariable learning ability...
May 18, 2017: Materials
https://www.readbyqxmd.com/read/28771846/amorphous-transition-metal-sulfides-anchored-on-amorphous-carbon-coated-multiwalled-carbon-nanotubes-for-enhanced-lithium-ion-storage
#13
Rencheng Jin, Qinghe Zhai, Qingyao Wang
Cobalt sulfide and molybdenum sulfide with high theoretical capacity have been considered as one of most promising anode materials for lithium-ion batteries (LIBs). However, the poor cyclability and low rate performance originated from the large volume expansion and poor electrical conductivity extremely inhibit their practical application. Here, the electrochemical performance is effectively improved by growing amorphous cobalt sulfide and molybdenum sulfide onto amorphous carbon coated multiwalled carbon nanotubes (CNTs@C@CoS2 and CNTs@C@MoS2)...
August 3, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28771495/social-and-content-aware-one-class-recommendation-of-papers-in-scientific-social-networks
#14
Gang Wang, XiRan He, Carolyne Isigi Ishuga
With the rapid development of information technology, scientific social networks (SSNs) have become the fastest and most convenient way for researchers to communicate with each other. Many published papers are shared via SSNs every day, resulting in the problem of information overload. How to appropriately recommend personalized and highly valuable papers for researchers is becoming more urgent. However, when recommending papers in SSNs, only a small amount of positive instances are available, leaving a vast amount of unlabelled data, in which negative instances and potential unseen positive instances are mixed together, which naturally belongs to One-Class Collaborative Filtering (OCCF) problem...
2017: PloS One
https://www.readbyqxmd.com/read/28767594/retroperitoneal-bronchogenic-cyst-resembling-an-adrenal-tumor-with-high-levels-of-serum-carbohydrate-antigen-19-9-a-case-report
#15
Min Wang, Xu He, Xia Qiu, Chuan Tian, Jian Li, Mingnan Lv
RATIONALE: Retroperitoneal bronchogenic cysts without specific clinical manifestations are extremely rare and difficult to diagnose preoperatively and are easily misdiagnosed as left adrenal or pancreatic tumors. PATIENT CONCERNS: A 48-year-old woman with the chief complaint of obscure epigastric pain for 1 month and with no other gastrointestinal symptoms and no significant medical history. The patient had signed informed consent for publication of this case report...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28767166/radiological-anatomy-of-the-perforators-of-the-gluteal-region-the-radiosome-based-anatomy
#16
Enrico Vigato, Eleonora De Antoni, Cesare Tiengo, Andrea Porzionato, Cinzia Tortorella, Maurizio Governa, Veronica Macchi, Raffaele De Caro
BACKGROUND: The superior (SGA) and the inferior gluteal artery (IGA) perforator flaps are widely used in pressure-sore repair and in breast reconstruction. The aim was to exhaustively depict the topographical anatomy of the whole system of perforators in the buttock. METHODS: Eighty lower-extremity computed tomographic angiography (CTA) of patients (20 males/20 females, mean age 61-years old, range 38-81) were considered. The source artery, location, type, and caliber of gluteal perforators were analyzed...
August 2, 2017: Microsurgery
https://www.readbyqxmd.com/read/28764916/outcome-of-oscillating-saw-open-osteotomy-in-two-stage-lower-extremity-bone-transport-with-monolateral-frame
#17
Pablo S Corona, Luis J Ramirez-Nuñez, Carles Amat, Luis Carrera
INTRODUCTION: Bone transport techniques have been widely used to solve massive bone defects due to trauma, osteomyelitis or bone tumors. The technique of bone interruption to achieve better new bone formation is a subject of debate. Low-energy osteotomy (LEO) techniques have been proposed as the gold standard. Some authors reject open osteotomy with an oscillating saw (OOS osteotomy), based on the danger of bone tissue thermal necrosis and periosteal damage. To date, however, there is no strong clinical evidence to discourage this high-energy (HEO) bone interruption technique...
July 25, 2017: Injury
https://www.readbyqxmd.com/read/28764872/integration-of-data-mining-classification-techniques-and-ensemble-learning-to-identify-risk-factors-and-diagnose-ovarian-cancer-recurrence
#18
Chih-Jen Tseng, Chi-Jie Lu, Chi-Chang Chang, Gin-Den Chen, Chalong Cheewakriangkrai
Ovarian cancer is the second leading cause of deaths among gynecologic cancers in the world. Approximately 90% of women with ovarian cancer reported having symptoms long before a diagnosis was made. Literature shows that recurrence should be predicted with regard to their personal risk factors and the clinical symptoms of this devastating cancer. In this study, ensemble learning and five data mining approaches, including support vector machine (SVM), C5.0, extreme learning machine (ELM), multivariate adaptive regression splines (MARS), and random forest (RF), were integrated to rank the importance of risk factors and diagnose the recurrence of ovarian cancer...
May 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28763827/-management-of-a-port-catheter-related-superior-vena-cava-thrombosis-in-the-setting-of-active-crohn-s-disease-a%C3%A2-case-report
#19
Ludwig Abel, Britta Uhde, Rolf Dembinski, Konstantin Schraepler
History and clinical findings A 56 year-old woman was admitted to our hospital for treatment of a severe exacerbation of Crohn's disease. During the stay a port catheter was implanted, safeguarding nutrition. A few days later the patient developed symptoms of a severe superior vena cava (SVC) syndrome with dyspnea, cyanosis, headaches and swelling of face and upper extremities. Examination A CT scan showed port catheter-associated SVC thrombosis with complete occlusion of the SVC. Diagnosis There was a coexistence of a port catheter-associated SVC thrombosis with complete occlusion of the SVC and a severe exacerbation of Crohn's disease with haematochezia...
August 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28762426/considerable-humidity-response-of-a-well-aligned-soms-micro-wire-flexible-sensor-by-moisture-induced-releasing-of-trapped-electrons
#20
Kuei-Lin Chan, Min-Han Yang, Hsin-Tien Chiu, Chi-Young Lee
Sandia Octahedral Molecular Sieves micro-wires (SOMS MWs) that exhibit ultra-high response to moisture and a short response time can be produced easily in an environmentally friendly mass production process. They are excellent candidate materials for use in humidity sensors. SOMS MWs were synthesized using niobium pentoxide as a precursor in concentrated sodium hydroxide solution. To fabricate humidity-sensing devices, electrophoresis was utilized to align the SOMS MWs on a polyethylene terephthalate (PET) substrate...
August 1, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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