keyword
MENU ▼
Read by QxMD icon Read
search

Operant conditioning

keyword
https://www.readbyqxmd.com/read/28527231/nordic-walking-improves-trunk-stability-and%C3%A2-gait-spatial-temporal-characteristics-in%C3%A2-people-with-parkinson-disease
#1
Marie-Anne Gougeon, Lei Zhou, Julie Nantel
BACKGROUND: This study aimed to assess the effect of walking with Nordic walking (NW) poles on postural stability and gait spatial-temporal characteristics in individuals with PD and to determine the cognitive load associated operating the poles. METHODS: Twelve individuals with PD (age: 61.6±11.7) were asked to perform four 90 s walking trials; with/without poles and with/without verbal fluency task (category fluency) after a 6-week independent NW training. We assessed gait spatial-temporal characteristics, and trunk postural stability using the APDM accelerometry system...
May 13, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28526871/electro-tactile-stimulation-enhances-cochlear-implant-speech-recognition-in-noise
#2
Juan Huang, Benjamin Sheffield, Payton Lin, Fan-Gang Zeng
For cochlear implant users, combined electro-acoustic stimulation (EAS) significantly improves the performance. However, there are many more users who do not have any functional residual acoustic hearing at low frequencies. Because tactile sensation also operates in the same low frequencies (<500 Hz) as the acoustic hearing in EAS, we propose electro-tactile stimulation (ETS) to improve cochlear implant performance. In ten cochlear implant users, a tactile aid was applied to the index finger that converted voice fundamental frequency into tactile vibrations...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526525/high-throughput-estimation-of-specific-activities-of-enzyme-mutants-in-cell-lysates-through-immunoturbidimetric-assay-of-proteins
#3
Xiaolan Yang, Yiran Feng, Huimin Chong, Deqiang Wang, Xiaolei Hu, Jun Pu, Chang-Guo Zhan, Fei Liao
High-throughput estimation of specific activities of an enzyme and its mutants in a group (enzyme/mutants) in cell lysates via high-throughput assay of their activities and separate immunoturbidimetric assay (ITA) of their proteins was proposed. Pseudomonas aeruginosa arylsulfatase (PAAS) and Bacillus fastidious uricase (BFU) served as two models. ITA employed 0.75 mg of antisera against PAAS or BFU as the reference in 96-well microplates to measure the difference of extinction at 340 and 700 nm. According to the calibration curve, ITA quantified the reference from 0...
May 16, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28526518/clinical-presentation-of-endometriosis-identified-at-interval-laparoscopic-tubal-sterilization-prospective-series-of-465-cases
#4
Marion Tissot, Lise Lecointre, Emilie Faller, Karolina Afors, Chérif Akladios, Alain Audebert
OBJECTIVES: Women seeking sterilization are usually parous and have no major complains, such as pelvic pain. This could be a good model to indirectly assess the prevalence of endometriosis in the general population. Prevalence of endometriosis in women undergoing tubal sterilization by laparoscopy has been assessed in 17 published reports. Results indicate a surprising wide variation of prevalence of endometriosis, ranging from 1.4% to 43.3 %. This clinical study describes the prevalence and clinical presentations of endometriosis identified at interval laparoscopic tubal sterilization, as a close representation of endometriosis in general population...
May 16, 2017: J Gynecol Obstet Hum Reprod
https://www.readbyqxmd.com/read/28526040/catching-a-floating-thrombus-a-case-report-on-the-treatment-of-a-large-thrombus-in-the-ascending-aorta
#5
Gijs Eduard de Maat, Giorgio Vigano, Massimo Alessandro Mariani, Ehsan Natour
BACKGROUND: The ascending aorta is an uncommon site for non-infective thrombus. In non-aneurysmal and non-atherosclerotic vessels this condition becomes extremely rare, while it represents a source of potential cerebral and peripheral embolic events. Currently, there is no consensus in the guidelines on how to treat a free floating thrombus in ascending aorta, therefore we present our decision making process and therapeutic strategy. CASE PRESENTATION: A healthy 48-year-old man was hospital admitted with acute abdominal pain...
May 19, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28526017/the-effect-of-hypoxia-on-the-lipidome-of-recombinant-pichia-pastoris
#6
Núria Adelantado, Pablo Tarazona, Karlheinz Grillitsch, Xavier García-Ortega, Sergi Monforte, Francisco Valero, Ivo Feussner, Günther Daum, Pau Ferrer
BACKGROUND: Cultivation of recombinant Pichia pastoris (Komagataella sp.) under hypoxic conditions has a strong positive effect on specific productivity when the glycolytic GAP promoter is used for recombinant protein expression, mainly due to upregulation of glycolytic conditions. In addition, transcriptomic analyses of hypoxic P. pastoris pointed out important regulation of lipid metabolism and unfolded protein response (UPR). Notably, UPR that plays a role in the regulation of lipid metabolism, amino acid metabolism and protein secretion, was found to be upregulated under hypoxia...
May 19, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28525850/highly-sensitive-aptasensor-based-on-fluorescence-resonance-energy-transfer-between-l-cysteine-capped-zns-quantum-dots-and-graphene-oxide-sheets-for-the-determination-of-edifenphos-fungicide
#7
Majid Arvand, Aazam A Mirroshandel
With the advantages of excellent optical properties and biocompatibility, single-strand DNA-functionalized quantum dots have been widely applied in biosensing and bioimaging. A new aptasensor with easy operation, high sensitivity, and high selectivity was developed by immobilizing the aptamer on water soluble l-cysteine capped ZnS quantum dots (QDs). Graphene oxide (GO) sheets are mixed with the aptamer-QDs. Consequently, the aptamer-conjugated QDs bind to the GO sheets to form a GO/aptamer-QDs ensemble. This aptasensor enables the energy transfer based on a fluorescence resonance energy transfer (FRET) from the QDs to the GO sheets, quenching the fluorescence of QDs...
May 12, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28525820/sensing-inhomogeneous-mechanical-properties-of-human-corneal-descemet-s-membrane-with-afm-nano-indentation
#8
Rosa Di Mundo, Giuseppina Recchia, Mohit Parekh, Alessandro Ruzza, Stefano Ferrari, Giuseppe Carbone
The paper describes a highly space-resolved characterization of the surface mechanical properties of the posterior human corneal layer (Descemet's membrane). This has been accomplished with Atomic Force Microscopy (AFM) nano-indentation by using a probe with a sharp tip geometry. Results indicate that the contact with this biological tissue in liquid occurs with no (or very low) adhesion. More importantly, under the same operating conditions, a broad distribution of penetration depth can be measured on different x-y positions of the tissue surface, indicating a high inhomogeneity of surface stiffness, not yet clearly reported in the literature...
May 10, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28525809/one-step-preparation-of-nanostructured-martite-catalyst-and-graphite-electrode-by-glow-discharge-plasma-for-heterogeneous-electro-fenton-like-process
#9
Alireza Khataee, Saeed Sajjadi, Aliyeh Hasanzadeh, Behrouz Vahid, Sang Woo Joo
Natural Martite ore particles and graphite were modified by alternating current (AC) glow discharge plasma to form nanostructured catalyst and cathode electrode for using in the heterogeneous-electro Fenton-like (Het-EF-like) process. The performance of the plasma-treated martite (PTM) and graphite electrode (PTGE) was studied for the treatment of paraquat herbicide in a batch system. 85.78% degradation efficiency for 20 mg L(-1) paraquat was achieved in the modified process under desired operational conditions (i...
May 16, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28525784/sodium-hypochlorite-as-an-alternative-to-hydrogen-peroxide-in-fenton-process-for-industrial-scale
#10
Jamshid Behin, Abbas Akbari, Mohsen Mahmoudi, Mehdi Khajeh
In present work, the treatment of aromatic compounds of simulated wastewater was performed by Fenton and NaOCl/Fe(2+) processes. The model solution was prepared based on the wastewater composition of Diisocyanate unit of Karoon Petrochemical Company/Iran containing Diamino-toluenes, Nitro-phenol, Mononitro-toluene, Nitro-cresol, and Dinitro-toluene. Experiments were conducted in a batch mode to examine the effects of operating variables such as pH, oxidant dosages, ferrous ion concentration and numbers of feeding on COD removal...
May 9, 2017: Water Research
https://www.readbyqxmd.com/read/28525745/conditional-switch-between-frameshifting-regimes-upon-translation-of-dnax-mrna
#11
Neva Caliskan, Ingo Wohlgemuth, Natalia Korniy, Michael Pearson, Frank Peske, Marina V Rodnina
Ribosome frameshifting during translation of bacterial dnaX can proceed via different routes, generating a variety of distinct polypeptides. Using kinetic experiments, we show that -1 frameshifting predominantly occurs during translocation of two tRNAs bound to the slippery sequence codons. This pathway depends on a stem-loop mRNA structure downstream of the slippery sequence and operates when aminoacyl-tRNAs are abundant. However, when aminoacyl-tRNAs are in short supply, the ribosome switches to an alternative frameshifting pathway that is independent of a stem-loop...
May 18, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28525670/hemoadsorption-treatment-of-patients-with-acute-infective-endocarditis-during-surgery-with-cardiopulmonary-bypass-a-case-series
#12
Karl Träger, Christian Skrabal, Guenther Fischer, Thomas Datzmann, Janpeter Schroeder, Daniel Fritzler, Jan Hartmann, Andreas Liebold, Helmut Reinelt
INTRODUCTION: Infective endocarditis is a serious disease condition. Depending on the causative microorganism and clinical symptoms, cardiac surgery and valve replacement may be needed, posing additional risks to patients who may simultaneously suffer from septic shock. The combination of surgery bacterial spreadout and artificial cardiopulmonary bypass (CPB) surfaces results in a release of key inflammatory mediators leading to an overshooting systemic hyperinflammatory state frequently associated with compromised hemodynamic and organ function...
May 19, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28525668/comparison-of-hand-and-semiautomatic-tracing-methods-for-creating-maxillofacial-artificial-organs-using-sequences-of-computed-tomography-ct-and-cone-beam-computed-tomography-cbct-images
#13
Bence T Szabo, Seçil Aksoy, Gabor Repassy, Krisztian Csomo, Csaba Dobo-Nagy, Kaan Orhan
INTRODUCTION: The aim of this study was to compare the paranasal sinus volumes obtained by manual and semiautomatic imaging software programs using both CT and CBCT imaging. METHODS: 121 computed tomography (CT) and 119 cone beam computed tomography (CBCT) examinations were selected from the databases of the authors' institutes. The Digital Imaging and Communications in Medicine (DICOM) images were imported into 3-dimensonal imaging software, in which hand mode and semiautomatic tracing methods were used to measure the volumes of both maxillary sinuses and the sphenoid sinus...
May 17, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28525631/primary-leiomyosarcoma-of-inferior-vena-cava-adjacent-to-hepatic-veins-complete-off-pump-resection-and-inferior-vena-cava-graft-reconstruction-with-application-of-external-skin-surface-cooling
#14
Michael Malyshev, Sergey Zotov, Anton Malyshev, Andrey Rostovykh
OBJECTIVES: Resection of a leiomyosarcoma of the inferior vena cava (IVC) requires venovenous bypass, especially if IVC clamping above the hepatic veins is planned. This report describes the application of external skin surface cooling for off-pump resection of a primary IVC leiomyosarcoma adjacent to the hepatic veins with graft IVC reconstruction in conditions of suprahepatic caval clamping and uninterrupted Pringle's manoeuvre. METHODS: A 62-year-old woman presented with IVC leiomyosarcoma adjacent to the hepatic veins...
May 19, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28524845/divergent-prebiotic-synthesis-of-pyrimidine-and-8-oxo-purine-ribonucleotides
#15
Shaun Stairs, Arif Nikmal, Dejan-Krešimir Bučar, Shao-Liang Zheng, Jack W Szostak, Matthew W Powner
Understanding prebiotic nucleotide synthesis is a long standing challenge thought to be essential to elucidating the origins of life on Earth. Recently, remarkable progress has been made, but to date all proposed syntheses account separately for the pyrimidine and purine ribonucleotides; no divergent synthesis from common precursors has been proposed. Moreover, the prebiotic syntheses of pyrimidine and purine nucleotides that have been demonstrated operate under mutually incompatible conditions. Here, we tackle this mutual incompatibility by recognizing that the 8-oxo-purines share an underlying generational parity with the pyrimidine nucleotides...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28524088/a-hybrid-generalized-hidden-markov-model-based-condition-monitoring-approach-for-rolling-bearings
#16
Jie Liu, Youmin Hu, Bo Wu, Yan Wang, Fengyun Xie
The operating condition of rolling bearings affects productivity and quality in the rotating machine process. Developing an effective rolling bearing condition monitoring approach is critical to accurately identify the operating condition. In this paper, a hybrid generalized hidden Markov model-based condition monitoring approach for rolling bearings is proposed, where interval valued features are used to efficiently recognize and classify machine states in the machine process. In the proposed method, vibration signals are decomposed into multiple modes with variational mode decomposition (VMD)...
May 18, 2017: Sensors
https://www.readbyqxmd.com/read/28523612/analysis-of-the-environmental-issues-concerning-the-deployment-of-an-otec-power-plant-in-martinique
#17
Damien A Devault, Anne Péné-Annette
Ocean thermal energy conversion (OTEC) is a form of power generation, which exploits the temperature difference between warm surface seawater and cold deep seawater. Suitable conditions for OTEC occur in deep warm seas, especially the Caribbean, the Red Sea and parts of the Indo-Pacific Ocean. The continuous power provided by this renewable power source makes a useful contribution to a renewable energy mix because of the intermittence of the other major renewable power sources, i.e. solar or wind power. Industrial-scale OTEC power plants have simply not been built...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28523477/the-impact-of-e-visits-on-patient-access-to-primary-care
#18
Xiang Zhong, Peter Hoonakker, Philip A Bain, Albert J Musa, Jingshan Li
To improve patient access to primary care, many healthcare organizations have introduced electronic visits (e-visits) to provide patient-physician communication through secure messages. However, it remains unclear how e-visit affects physicians' operations on a daily basis and whether it would increase physicians' panel size. In this study, we consider a primary care physician who has a steady patient panel and manages patients' office and e-visits, as well as other indirect care tasks. We use queueing-based performance outcomes to evaluate the performance of care delivery...
May 18, 2017: Health Care Management Science
https://www.readbyqxmd.com/read/28523399/anal-sphincter-injury-in-vaginal-deliveries-complicated-by-shoulder-dystocia
#19
Mark P Hehir, Zachary Rubeo, Karen Flood, Anne H Mardy, Colm O'Herlihy, Peter C Boylan, Mary E D'Alton
INTRODUCTION AND HYPOTHESIS: Shoulder dystocia is an obstetric emergency that occurs in 0.2-3% of all cephalic vaginal deliveries. We hypothesized that because of the difficult nature of deliveries complicated by shoulder dystocia, the condition may be associated with anal sphincter injury. We sought to identify risk factors for obstetric anal sphincter injury in women with shoulder dystocia. METHODS: This retrospective analysis included all cases of shoulder dystocia from 2007 to 2011 at two large tertiary referral centers, in the USA and Ireland...
May 18, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28523161/the-safety-profile-of-preoperative-administration-of-heparin-for-thromboprophylaxis-in-chinese-patients-intended-for-thoracoscopic-major-thoracic-surgery-a-pilot-randomized-controlled-study
#20
Han-Yu Deng, Chang-Lin Shi, Gang Li, Jun Luo, Zhi-Qiang Wang, Yi-Dan Lin, Lun-Xu Liu, Qing-Hua Zhou
BACKGROUND: Patients undergoing major thoracic surgery especially for cancers are at a high risk of perioperative thromboembolism. Current guidelines recommended either heparin sodium (unfractionated heparin) or low-molecular-weight heparin (LMWH) for those patients at high risk of deep vein thrombosis (DVT). However, the rational timing of starting heparin has not yet been well established, because DVT can be caused by not only surgery but also comorbidities as well as prolonged hospital stay, and thoracic surgeons always concerned about heparin-related increased risk of intra- or post-operative bleeding...
April 2017: Journal of Thoracic Disease
keyword
keyword
27310
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"