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https://www.readbyqxmd.com/read/28918575/optimum-spacing-between-electrodes-in-an-air-cathode-single-chamber-microbial-fuel-cell-with-a-low-cost-polypropylene-separator
#1
Sanath Kondaveeti, Jung Mi Moon, Booki Min
The performance of a single chamber microbial fuel cell (MFC) with a low-cost polypropylene separator was investigated at various electrode interspaces in a separator electrode assembly (SEA). The lag period was shortened (3.74-0.17 days) and voltage generation was enhanced (0.2-0.5 V) as electrode spacing was increased from 0 to 9 mm. Power density was increased from 220 to 370 mW/m(2) with increased spacing. The highest power density of 488 mW/m(2) was obtained in polarization analysis with 6 mm. The oxygen mass transfer coefficients with 0 mm (K o = 3...
September 16, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28918537/reverse-genetics-of-filoviruses
#2
Thomas Hoenen, Janine Brandt, Yíngyún Caì, Jens H Kuhn, Courtney Finch
Reverse genetics systems are used for the generation of recombinant viruses. For filoviruses, this technology has been available for more than 15 years and has been used to investigate questions regarding the molecular biology, pathogenicity, and host adaptation determinants of these viruses. Further, reporter-expressing, recombinant viruses are increasingly used as tools for screening for and characterization of candidate medical countermeasures. Thus, reverse genetics systems represent powerful research tools...
September 17, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28918464/what-s-next-in-complex-networks-capturing-the-concept-of-attacking-play-in-invasive-team-sports
#3
REVIEW
João Ramos, Rui J Lopes, Duarte Araújo
The evolution of performance analysis within sports sciences is tied to technology development and practitioner demands. However, how individual and collective patterns self-organize and interact in invasive team sports remains elusive. Social network analysis has been recently proposed to resolve some aspects of this problem, and has proven successful in capturing collective features resulting from the interactions between team members as well as a powerful communication tool. Despite these advances, some fundamental team sports concepts such as an attacking play have not been properly captured by the more common applications of social network analysis to team sports performance...
September 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28918356/what-is-the-price-for-the-duchenne-gait-pattern-in-patients-with-cerebral-palsy
#4
Firooz Salami, Mirjam Niklasch, Britta K Krautwurst, Thomas Dreher, Sebastian I Wolf
Duchenne gait is characterized by trunk lean towards the affected stance limb with the pelvis stable or elevated on the swinging limb side during single limb stance phase. We assessed the relationship between hip abduction moments and trunk kinetics in patients with cerebral palsy showing excessive lateral trunk motion. Data of 18 subjects with bilateral spastic cerebral palsy (CP) and 20 aged matched typically developing subjects (TD) were collected retrospectively. Criteria for patient selection were barefoot walking without aid presenting with excessive lateral trunk motion...
September 7, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28918344/accesses-for-alcohol-intoxication-to-the-emergency-department-and-the-risk-of-re-hospitalization-an-observational-retrospective-study
#5
Maurizio Baldassarre, Fabio Caputo, Raimondo Maria Pavarin, Matteo Massimo Bossi, Maria Elena Bonavita, Paolo Caraceni, Alice Grignaschi, Mimosa Balloni, Mario Cavazza, Mauro Bernardi, Marco Domenicali
BACKGROUND: Alcohol use disorders (AUD) are a frequent cause of admission to emergency departments (EDs) for acute alcohol intoxication (AAI). Patients with AUD present a higher risk of readmission to EDs for AAI than the general population, however, the distinction between sporadic AAI and AAI in the context of AUD in the ED setting is difficult. AIMS: To analyze the epidemiological characteristics of patients admitted to EDs because of AAI and to identify factors associated with repeated admissions in order to develop a risk stratification system for patients with AUD based on objective data that can be easily applied in an ED setting...
September 1, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28918315/does-cognitive-behavioural-therapy-for-insomnia-improve-cognitive-performance-a-systematic-review-and-narrative-synthesis
#6
REVIEW
Vanessa Herbert, Simon D Kyle, Daniel Pratt
Individuals with insomnia report difficulties pertaining to their cognitive functioning. Cognitive behavioural therapy for insomnia (CBT-I) is associated with robust, long-term improvements in sleep parameters, however less is known about the impact of CBT-I on the daytime correlates of the disorder. A systematic review and narrative synthesis was conducted in order to summarise and evaluate the evidence regarding the impact of CBT-I on cognitive functioning. Reference databases were searched and studies were included if they assessed cognitive performance as an outcome of CBT-I, using either self-report questionnaires or cognitive tests...
July 12, 2017: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/28918313/learning-with-three-factors-modulating-hebbian-plasticity-with-errors
#7
REVIEW
Łukasz Kuśmierz, Takuya Isomura, Taro Toyoizumi
Synaptic plasticity is a central theme in neuroscience. A framework of three-factor learning rules provides a powerful abstraction, helping to navigate through the abundance of models of synaptic plasticity. It is well-known that the dopamine modulation of learning is related to reward, but theoretical models predict other functional roles of the modulatory third factor; it may encode errors for supervised learning, summary statistics of the population activity for unsupervised learning or attentional feedback...
September 14, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28918193/psychedelic-pleasures-an-affective-understanding-of-the-joys-of-tripping
#8
Frederik Bøhling
BACKGROUND: This paper considers the pleasures of psychedelic drugs and proposes a Deleuzian understanding of drugged pleasures as affects. In spite of a large body of work on psychedelics, not least on their therapeutic potentials, the literature is almost completely devoid of discussions of the recreational practices and pleasures of entheogenic drugs. Yet, most people do not use psychedelics because of their curative powers, but because they are fun and enjoyable ways to alter the experience of reality...
September 13, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/28918167/different-nutritional-assessment-tools-as-predictors-of-postoperative-complications-in-patients-undergoing-colorectal-cancer-resection
#9
Sílvia Fernandes Maurício, Jingjie Xiao, Carla M Prado, Maria Cristina Gonzalez, Maria Isabel Toulson Davisson Correia
BACKGROUND & AIMS: Malnutrition in patients with colorectal cancer contributes to increased postoperative complications. The aim of the study was to evaluate the prognostic value of several nutritional assessment parameters: body mass index versus percentage of weight loss grading system (BMI/%WL); Patient-Generated Subjective Global Assessment (PG-SGA); standardized phase angle (SPA) by BIA; muscle strength by handgrip strength; muscle mass by computerized tomography; and the combination of muscle mass and strength in patients undergoing resection surgery...
September 4, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28918092/growth-rate-dependent-regulation-of-trna-level-and-charging-in-bacillus-licheniformis
#10
Iolanda Ferro, Klaus Liebeton, Zoya Ignatova
Cellular growth crucially depends on protein synthesis and the abundance of translational components. Among them, aminoacyl-tRNAs play a central role in biosynthesis and shape the kinetics of mRNA translation, thus influencing protein production. Here, we used microarray-based approaches to determine the charging levels and tRNA abundance of Bacillus licheniformis. We observed an interesting cross-talk among tRNA expression, charging pattern and growth rate. For a large subset of tRNAs, we found a co-regulated and augmented expression at high growth rate...
September 13, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28917938/the-evaluation-of-antioxidant-and-antifungal-properties-of-6-amino-6-deoxychitosan-in-vitro
#11
Fang Luan, Qing Li, Wenqiang Tan, Lijie Wei, Jingjing Zhang, Fang Dong, Guodong Gu, Zhanyong Guo
We synthesized 6-amino-6-deoxychitosan (NCS) through a series of reactions from chitosan (CS). The antioxidant ability of CS and NCS were investigated in vitro, including that of DPPH-radical and hydrogen peroxide, reducing power, chelating abilities and inhibition of lipid peroxidation. As expected, after the introduction of amino groups, antioxidant ability had improved significantly. Especially, scavenging effect against DPPH-radical and hydrogen peroxide of NCS were 97% and 92% at 1.6mg/mL, respectively...
September 13, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28917924/synthesis-of-amphoteric-curdlan-derivatives-for-delivery-of-therapeutic-nucleic-acids
#12
Yao Tong, Tsogzolmaa Ganbold, Huricha Baigude
Cationic polymers are powerful carriers for intracellular delivery of therapeutic nucleic acids. However, the positively charged macromolecules have considerable cytotoxicity and often induce irreversible damages to the cells and tissues, which greatly negate the clinical application of such materials as drug delivery system. Herein, we report the synthesis of novel amphoteric polymers based on curdlan, and the evaluation of their cytotoxicity as well as the nucleic acid delivery efficiency. β-(1,3)-polyglucuronic acid, a TEMPO-oxidized derivative of curdlan, was chemically modified by conjugation of tetraethylenepentamine...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917842/multi-scale-simulations-of-biological-systems-using-the-opep-coarse-grained-model
#13
Fabio Sterpone, Sébastien Doutreligne, Thanh Thuy Tran, Simone Melchionna, Marc Baaden, Phuong H Nguyen, Philippe Derreumaux
Biomolecules are complex machines that are optimized by evolution to properly fulfill or contribute to a variety of biochemical tasks in the cellular environment. Computer simulations based on quantum mechanics and atomistic force fields have been proven to be a powerful microscope for obtaining valuable insights into many biological, physical, and chemical processes. Many interesting phenomena involve, however, a time scale and a number of degrees of freedom, notably if crowding is considered, that cannot be explored at an atomistic resolution...
September 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28917826/potassic-zeolites-from-brazilian-coal-ash-for-use-as-a-fertilizer-in-agriculture
#14
Camila Gomes Flores, Helena Schneider, Nilson Romeu Marcilio, Lizete Ferret, João Carlos Pinto Oliveira
Brazilian coal has an ash content ranging from 30 to 50% by weight. Consequently, its use in coal-fired thermoelectric for power production generates a lot of waste. The construction sector is the largest consumer of coal ash, but it cannot absorb the entire amount generated. Thus, other applications for coal ash should be studied in aim to optimize the use of this industrial waste. This research had as focus to synthesize potassic zeolite from of the coal ash into on potassium fertilizer for the grown wheat plant...
September 13, 2017: Waste Management
https://www.readbyqxmd.com/read/28917781/fluorescence-self-quenching-assay-for-the-detection-of-target-collagen-sequences-using-a-short-probe-peptide
#15
Linge Nian, Yue Hu, Caihong Fu, Chen Song, Jie Wang, Jianxi Xiao
The development of novel assays to detect collagen fragments is of utmost importance for diagnostic, prognostic and therapeutic decisions in various collagen-related diseases, and one essential question is to discover probe peptides that can specifically recognize target collagen sequences. Herein we have developed the fluorescence self-quenching assay as a convenient tool to screen the capability of a series of fluorescent probe peptides of variable lengths to bind with target collagen peptides. We have revealed that the targeting ability of probe peptides is length-dependent, and have discovered a relatively short probe peptide FAM-G(POG)8 capable to identify the target peptide...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917779/-on-off-switchable-tool-for-food-sample-preparation-merging-molecularly-imprinting-technology-with-stimuli-responsive-blocks-current-status-challenges-and-highlighted-applications
#16
REVIEW
Raquel Garcia, Marco D R Gomes da Silva, Maria João Cabrita
Sample preparation still remains a great challenge in the analytical workflow representing the most time-consuming and laborious step in analytical procedures. Ideally, sample pre-treatment procedures must be more selective, cheap, quick and environmental friendly. Molecular imprinting technology is a powerful tool in the development of highly selective sample preparation methodologies enabling to preconcentrate the analytes from a complex food matrix. Actually, the design and development of molecularly imprinted polymers-based functional materials that merge an enhancement of selectivity with a controllable and switchable mode of action by means of specific stimulus constitutes a hot research topic in the field of food analysis...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917770/applicability-of-the-direct-injection-liquid-chromatographic-tandem-mass-spectrometric-analytical-approach-to-the-sub-ngl-1-determination-of-perfluoro-alkyl-acids-in-waste-surface-ground-and-drinking-water-samples
#17
Lorenzo Ciofi, Lapo Renai, Daniele Rossini, Claudia Ancillotti, Alida Falai, Donatella Fibbi, Maria Concetta Bruzzoniti, José Juan Santana-Rodriguez, Serena Orlandini, Massimo Del Bubba
The applicability of a direct injection UHPLC-MS/MS method for the analysis of several perfluoroalkyl acids (PFAAs) in a wide range of water matrices was investigated. The method is based on the direct injection of 100µL of centrifuged water sample, without any other sample treatment. Very good method detection limits (0.014-0.44ngL(-1)) and excellent intra and inter-day precision (RSD% values in the range 1.8-4.4% and 2.7-5.7%, respectively) were achieved, with a total analysis time of 20min per sample. A high number of samples - i...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917724/backward-genotype-transcript-phenotype-association-mapping
#18
Seunghak Lee, Haohan Wang, Eric P Xing
Genome-wide association studies have discovered a large number of genetic variants associated with complex diseases such as Alzheimer's disease. However, the genetic background of such diseases is largely unknown due to the complex mechanisms underlying genetic effects on traits, as well as a small sample size (e.g., 1000) and a large number of genetic variants (e.g., 1 million). Fortunately, datasets that contain genotypes, transcripts, and phenotypes are becoming more readily available, creating new opportunities for detecting disease-associated genetic variants...
September 13, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28917711/crocodiles-and-alligators-antiamoebic-and-antitumor-compounds-of-crocodiles
#19
Ruqaiyyah Siddiqui, Shareni Jeyamogan, Salwa Mansoor Ali, Fatima Abbas, K A Sagathevan, Naveed Ahmed Khan
Crocodiles exist in unsanitary environments, feed on rotten meat, are often exposed to heavy metals such as arsenic, cadmium, cobalt, chromium, mercury, nickel, lead, selenium, tolerate high levels of radiation, and are amid the very few species to survive the catastrophic Cretaceous-Tertiary extinction event, nonetheless they can live for up to a 100 years. Moreover, as they live in unhygienic conditions, they regularly come across pathogens. Logically, we postulate that crocodiles have established mechanisms to defend themselves from noxious agents as well as protecting themselves from pathogens...
September 13, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28917698/introducing-axonal-myelination-in-connectomics-a-preliminary-analysis-of-g-ratio-distribution-in-healthy-subjects
#20
REVIEW
Matteo Mancini, Giovanni Giulietti, Nicholas Dowell, Barbara Spanò, Neil Harrison, Marco Bozzali, Mara Cercignani
Microstructural imaging and connectomics are two research areas that hold great potential for investigating brain structure and function. Combining these two approaches can lead to a better and more complete characterization of the brain as a network. The aim of this work is characterizing the connectome from a novel perspective using the myelination measure given by the g-ratio. The g-ratio is the ratio of the inner to the outer diameters of a myelinated axon, whose aggregated value can now be estimated in vivo using MRI...
September 13, 2017: NeuroImage
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