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https://www.readbyqxmd.com/read/28099805/the-importance-of-cannizzaro-type-reactions-during-electrocatalytic-reduction-of-carbon-dioxide
#1
Yuvraj Y Birdja, Marc T M Koper
A seemingly catalytic inactive electrode as boron doped diamond is found to be active for CO2 and CO reduction to formaldehyde and even methane. At very cathodic potentials formic acid and methanol are formed as well. However, these products are the result of base-catalyzed Cannizzaro-type disproportionation reactions. A local alkaline environment near the electrode surface, caused by the hydrogen evolution reaction, initiates aldehyde disproportionation promoted by hydroxide ions, which leads to the formation of the corresponding carboxylic acid and alcohol...
January 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28097924/enhancing-the-performance-of-electro-peroxone-by-incorporation-of-uv-irradiation-and-bdd-anodes
#2
Nasr Bensalah, Ahmed Bedoui
In this work, the treatment of 4-nitrophenol (NP) in water by ozonation, electrolysis, electro-peroxone (EP), and photo-electro-peroxone (PEP) processes was investigated. PEP process is based on the combination of ozonation, UV irradiation, and electrolysis using carbon felt cathode and Boron Doped Diamond (BDD) anode. In this process, H2O2 is electrochemically generated from reduction of O2 in the ozone generator effluent at a carbon felt cathode. The insitu generated H2O2 is simultaneously decomposed by UV- photolysis and by reaction with O3 to form HO(-) radicals that can rapidly and non-selectively oxidize organic pollutants...
January 18, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28033567/electrochemical-oxidation-of-cod-from-real-textile-wastewaters-kinetic-study-and-energy-consumption
#3
Jiaxiu Zou, Xiaolan Peng, Miao Li, Ying Xiong, Bing Wang, Faqin Dong, Bin Wang
In the present study, the electrochemical oxidation of real wastewaters discharged by textile industry was carried out using a boron-doped diamond (BDD) anode. The effect of operational variables, such as applied current density (20-100 mA·cm(-2)), NaCl concentration added to the real wastewaters (0-3 g·L(-1)), and pH value (2.0-10.0), on the kinetics of COD oxidation and on the energy consumption was carefully investigated. The obtained experimental results could be well matched with a proposed kinetic model, in which the indirect oxidation mediated by electrogenerated strong oxidants would be described through a pseudo-first-order kinetic constant k...
December 19, 2016: Chemosphere
https://www.readbyqxmd.com/read/28030788/definitive-screening-design-applied-to-electrochemical-degradation-of-chromotrope-2r-with-bdd-anodes
#4
Xiaoming Du, Zhefeng Zhang, Chunyong Zhang, Degang Fu
Here, a novel three-level definitive screening design (DSD) was initially employed to investigate the electrochemical degradation of Chromotrope 2R (C2R) with boron-doped diamond (BDD) anodes. Experiments were performed using a synthetic C2R solution containing five supporting electrolytes (Na2SO4, NaCl, Na3PO4, NaNO3 and Na2CO3). The effects of nine quantitative parameters on C2R removal rate: initial C2R concentration (50-100 mg L(-1)), applied current density (1.29-3.87 mA cm(-2)), Na2SO4 concentration (0-10 mM), NaCl concentration (0-10 mM), Na3PO4 concentration (0-10 mM), NaNO3 concentration (0-10 mM), Na2CO3 concentration (0-10 mM), flow rate (300-500 mL min(-1)) and temperature (10-50 °C), were investigated...
December 21, 2016: Chemosphere
https://www.readbyqxmd.com/read/28008432/polycrystalline-boron-doped-diamond-electrodes-for-electrocatalytic-and-electrosynthetic-applications
#5
Tribidasari A Ivandini, Yasuaki Einaga
Boron-doped diamond (BDD) electrodes are recognized as being superior to other electrode materials due to their outstanding chemical and dimensional stability, their exceptionally low background current, the extremely wide potential window for water electrolysis that they have, and their excellent biocompatibility. However, whereas these properties have been utilized in the rapid development of electroanalytical applications, very few studies have been done in relation to their applications in electrocatalysis or electrosynthesis...
December 23, 2016: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/27998509/visual-selective-attention-in-body-dysmorphic-disorder-bulimia-nervosa-and-healthy-controls
#6
Ines Kollei, Stefanie Horndasch, Yesim Erim, Alexandra Martin
OBJECTIVE: Cognitive behavioral models postulate that selective attention plays an important role in the maintenance of body dysmorphic disorder (BDD). It is suggested that individuals with BDD overfocus on perceived defects in their appearance, which may contribute to the excessive preoccupation with their appearance. METHODS: The present study used eye tracking to examine visual selective attention in individuals with BDD (n=19), as compared to individuals with bulimia nervosa (BN) (n=21) and healthy controls (HCs) (n=21)...
January 2017: Journal of Psychosomatic Research
https://www.readbyqxmd.com/read/27968940/obsession-with-perfection-body-dysmorphia
#7
Neelam A Vashi
The deeply rooted fascination with beauty penetrates society worldwide. The indulgence to look and feel beautiful pervades all ages, genders, and nationalities, with research conferring a remarkable tendency to agree on measures of attractiveness among these disparate groups. Research has found that beautiful people do, in fact, receive more desirable outcomes in life and job satisfaction, family formation, and overall happiness. Humans have a tendency to respond to attractive persons more favorably, driving many patients to our clinics...
November 2016: Clinics in Dermatology
https://www.readbyqxmd.com/read/27966680/developing-high-performance-small-molecule-organic-solar-cells-via-a-large-planar-structure-and-an-electron-withdrawing-central-unit
#8
Hongtao Zhang, Yongtao Liu, Yanna Sun, Miaomiao Li, Bin Kan, Xin Ke, Qian Zhang, Xiangjian Wan, Yongsheng Chen
We designed and synthesized a new small molecule donor material named DR3TBDD using an electron-withdrawing unit BDD as the central building block. A PCE of 9.53% with a high Voc of around 1 V was achieved.
December 22, 2016: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/27941273/development-of-electrochemical-oxygen-demand-measurement-cells-using-a-diamond-electrode
#9
Takeshi Kondo, Masaki Hoshino, Takeshi Watanabe, Tatsuo Aikawa, Makoto Yuasa, Yasuaki Einaga
Electrolytic cells for electrochemical oxygen demand (ECOD) measurements based on total electrolytic decomposition at a boron-doped diamond (BDD) electrode were developed for rapid measurement of organic pollutants at low concentrations. Using improved electrolytic cells designed for efficient mass transfer, the ECOD for 10 μM potassium hydrogen phthalate (theoretical ECOD: 2.3 mg-O2 L(-1)) was determined in a relatively short electrolysis time. Thus, ECOD measurements using these cells would be useful for estimating organic water pollution in industrial waste and lake water...
2016: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/27934028/co-reactant-on-demand-ecl-electrogenerated-chemiluminescence-by-the-in-situ-production-of-s2o8-2-at-boron-doped-diamond-electrodes
#10
Irkham, Takeshi Watanabe, Andrea Fiorani, Giovanni Valenti, Francesco Paolucci, Yasuaki Einaga
A novel co-reactant-free electrogenerated chemiluminescence (ECL) system is developed where Ru(bpy)3(2+) emission is obtained on boron-doped diamond (BDD) electrodes. The method exploits the unique ability of BDD to operate at very high oxidation potential in aqueous solutions and to promote the conversion of inert SO4(2-) into the reactive co-reactant S2O8(2-). This novel procedure is rather straightforward, not requiring any particular electrode geometry, and since the co-reactant is only generated in situ, the interference with biological samples is minimized...
December 7, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27932116/surgical-complications-in-en-bloc-renal-transplantation
#11
M A Moreno de la Higuera Díaz, N Calvo Romero, I Pérez-Flores, M Calvo Arévalo, B Rodríguez Cubillo, A Shabaka, V López de la Manzanara, Á Gómez Vegas, J Blázquez Izquierdo, A I Sánchez-Fructuoso
En bloc pediatric transplantation (EBPT) began with the aim of increasing the donor pool due to the existing high demand for donors. At its inception, it was considered a type of suboptimal transplantation due to its association with a high incidence of vascular, urologic, and immunologic complications. The main objective of this study was to update information on EBPT with the largest case series that exists on a worldwide scale. In a retrospective study, the results obtained from brain-dead donors (BDDs; n = 770) were compared to those of EBPT (n = 100) from January 1990 to December 2012...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27930752/prevalence-of-body-dysmorphic-disorder-and-surgeon-diagnostic-accuracy-in-facial-plastic-and-oculoplastic-surgery-clinics
#12
Andrew W Joseph, Lisa Ishii, Shannon S Joseph, Jane I Smith, Peiyi Su, Kristin Bater, Patrick Byrne, Kofi Boahene, Ira Papel, Theda Kontis, Raymond Douglas, Christine C Nelson, Masaru Ishii
Importance: Body dysmorphic disorder (BDD) is a relative contraindication for facial plastic surgery, but formal screening is not common in practice. The prevalence of BDD in patients seeking facial plastic surgery is not well documented. Objective: To establish the prevalence of BDD across facial plastic and oculoplastic surgery practice settings, and estimate the ability of surgeons to screen for BDD. Design, Setting, and Participants: This multicenter prospective study recruited a cohort of 597 patients who presented to academic and private facial plastic and oculoplastic surgery practices from March 2015 to February 2016...
December 8, 2016: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/27918970/-not-just-right-experiences-and-incompleteness-in-body-dysmorphic-disorder
#13
Berta J Summers, Natalie L Matheny, Jesse R Cougle
The current studies examined the role of 'not just right' experiences (NJREs) and incompleteness (INC) in body dysmorphic disorder (BDD). In Study 1, a clinical BDD sample endorsed more severe NJREs than healthy controls, when controlling co-occurring symptoms of depression and anxiety. In Study 2, INC predicted reactivity to an in vivo task designed to evoke BDD-related concerns in an unselected sample. Study 3 demonstrated a positive relationship between INC and BDD symptom severity in a community sample...
January 2017: Psychiatry Research
https://www.readbyqxmd.com/read/27918913/reduced-cortical-thickness-in-body-dysmorphic-disorder
#14
Sally A Grace, Ben G Buchanan, Jerome J Maller, Wei Lin Toh, David J Castle, Susan L Rossell
Recent neuroimaging studies in body dysmorphic disorder (BDD) have implicated abnormal structure and function of occipito-temporal and fronto-limbic regions in the potential pathophysiology of the disorder. To date, morphometric investigations have yielded inconsistent results, and have suggested that clinical symptoms may mediate structural brain abnormalities in BDD. We measured Grey Matter (GM) cortical thickness in 20 participants with BDD and 20 healthy control participants matched on age, gender, estimated IQ and handedness...
January 30, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/27914726/removal-of-2-mib-and-geosmin-by-electrogenerated-persulfate-performance-mechanism-and-pathways
#15
Lingjun Bu, Shiqing Zhou, Zhou Shi, Lin Deng, Naiyun Gao
In this study, the degradation of 2-methylisoborneol (2-MIB) and geosmin (GSM) was evaluated by electrochemical oxidation (EO) using boron-doped diamond (BDD) electrode. Both 2-MIB and GSM could be degraded efficiently in sulfate electrolyte compared to inert nitrate or perchlorate electrolytes, implying that in-situ generated persulfate may be responsible for contaminants degradation. The observed linear relationship between 2-MIB (GSM) degradation rates and persulfate generation rates further proved that the in-situ generated persulfate enhanced 2-MIB (GSM) degradation...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27899165/cognitive-dysfunction-in-body-dysmorphic-disorder-new-implications-for-nosological-systems-and-neurobiological-models
#16
Kiri Jefferies-Sewell, Samuel R Chamberlain, Naomi A Fineberg, Keith R Laws
: Introduction Body dysmorphic disorder (BDD) is a debilitating disorder, characterized by obsessions and compulsions relating specifically to perceived appearance, and which has been newly classified within the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) Obsessive-Compulsive and Related Disorders grouping. Until now, little research has been conducted into the cognitive profile of this disorder. METHODS: Participants with BDD (n=12) and participants without BDD (n=16) were tested using a computerized neurocognitive battery investigating attentional set-shifting (Intra/Extra Dimensional Set Shift Task), decision-making (Cambridge Gamble Task), motor response-inhibition (Stop-Signal Reaction Time Task), and affective processing (Affective Go-No Go Task)...
November 30, 2016: CNS Spectrums
https://www.readbyqxmd.com/read/27869127/main-effects-of-diagnoses-brain-regions-and-their-interaction-effects-for-cerebral-metabolites-in-bipolar-and-unipolar-depressive-disorders
#17
Hai-Zhu Tan, Hui Li, Chen-Feng Liu, Ji-Tian Guan, Xiao-Bo Guo, Can-Hong Wen, Shao-Min Ou, Yin-Nan Zhang, Jie Zhang, Chong-Tao Xu, Zhi-Wei Shen, Ren-Hua Wu, Xue-Qin Wang
Previous studies suggested patients with bipolar depressive disorder (BDd) or unipolar depressive disorder (UDd) have cerebral metabolites abnormalities. These abnormalities may stem from multiple sub-regions of gray matter in brain regions. Thirteen BDd patients, 20 UDd patients and 20 healthy controls (HC) were enrolled to investigate these abnormalities. Absolute concentrations of 5 cerebral metabolites (glutamate-glutamine (Glx), N-acetylaspartate (NAA), choline (Cho), myo-inositol (mI), creatine (Cr), parietal cortex (PC)) were measured from 4 subregions (the medial frontal cortex (mPFC), anterior cingulate cortex (ACC), posterior cingulate cortex (PCC), and parietal cortex (PC)) of gray matter...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847122/electrochemical-mineralization-of-cephalexin-using-a-conductive-diamond-anode-a-mechanistic-and-toxicity-investigation
#18
Douglas A C Coledam, Marília M S Pupo, Bianca F Silva, Adilson J Silva, Katlin I B Eguiluz, Giancarlo R Salazar-Banda, José M Aquino
The contamination of surface and ground water by antibiotics is of significant importance due to their potential chronic toxic effects to the aquatic and human lives. Thus, in this work, the electrochemical oxidation of cephalexin (CEX) was carried out in a one compartment filter-press flow cell using a boron-doped diamond (BDD) electrode as anode. During the electrolysis, the investigated variables were: supporting electrolyte (Na2SO4, NaCl, NaNO3, and Na2CO3) at constant ionic strength (0.1 M), pH (3, 7, 10, and without control), and current density (5, 10 and 20 mA cm(-2))...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27803720/prevalence-of-body-dysmorphic-disorder-and-its-association-with-body-features-in-female-medical-students
#19
Shaik Shaffi Ahamed, Jawaher Enani, Lama Alfaraidi, Lujain Sannari, Rihaf Algain, Zainah Alsawah, Ali Al Hazmi
BACKGROUND: Body dysmorphic disorder (BDD) is a distressing psychiatric disorder. So far there have not been any studies on BDD in Saudi Arabia. OBJECTIVES: The aim of this study was to determine the prevalence of body dysmorphic disorder in female medical students and to investigate whether there is an association between BDD and body features of concern, social anxiety and symptoms of BDD. MATERIALS AND METHODS: A cross sectional study was carried out on female medical students of the college of medicine, King Saud University, Riyadh, Saudi Arabia during January to April, 2015...
June 2016: Iranian Journal of Psychiatry and Behavioral Sciences
https://www.readbyqxmd.com/read/27761610/avoiding-psychological-pitfalls-in-aesthetic-medical-procedures
#20
Qiuyu Wang, Chuan Cao, Rui Guo, Xiaoge Li, Lele Lu, Wenping Wang, Shirong Li
OBJECTIVE: To assess the prevalence of body dysmorphic disorder (BDD) in an aesthetic surgery setting in the region of Southwest China, and to ascertain the differences in terms of body images between patients in the aesthetic setting and general Chinese population. This study tracked patient satisfaction with their body image changes while undergoing aesthetic medical procedures to identify whether the condition of patients who were presenting with BDD symptoms or their psychological symptoms could be improved by enhancing their appearance...
December 2016: Aesthetic Plastic Surgery
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