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https://www.readbyqxmd.com/read/29135685/olivocochlear-efferent-activity-is-associated-with-the-slope-of-the-psychometric-function-of-speech-recognition-in-noise
#1
Ian B Mertes, Erin C Wilbanks, Marjorie R Leek
OBJECTIVES: The medial olivocochlear (MOC) efferent system can modify cochlear function to improve sound detection in noise, but its role in speech perception in noise is unclear. The purpose of this study was to determine the association between MOC efferent activity and performance on two speech-in-noise tasks at two signal-to-noise ratios (SNRs). It was hypothesized that efferent activity would be more strongly correlated with performance at the more challenging SNR, relative to performance at the less challenging SNR...
November 9, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/29134675/analytical-approach-dissipation-pattern-and-risk-assessment-of-pesticide-residue-in-green-leafy-vegetables-a-comprehensive-review
#2
REVIEW
Waziha Farha, A M Abd El-Aty, Md Musfiqur Rahman, Ji Hoon Jeong, Ho-Chul Shin, Jing Wang, Sung Shik Shin, Jae-Han Shim
The category of "leafy vegetables" comprises a wide range of plants, including cabbage, lettuce, leeks, spinach, Swiss chard, and kale, and it forms a significant component of the human diet. Typically, leafy vegetables are low in calories and fat, are great sources of vitamins, protein, dietary fibre, minerals (including iron, calcium, and nitrates), and are rich in phytochemicals. To counter the impact of pests on vegetables, a broad variety of pesticides is used. Because of their large surface areas, leafy vegetables are expected to have high residual pesticide levels...
November 14, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29108741/the-role-of-smell-taste-flavour-and-texture-cues-in-the-identification-of-vegetables
#3
V L van Stokkom, A E Blok, O van Kooten, C de Graaf, M Stieger
It has been shown that the identification of many foods including vegetables based on flavour cues is often difficult. The effect of providing texture cues in addition to flavour cues on the identification of foods and the effect of providing taste cues only on the identification of foods have not been studied. The aim of this study was to assess the role of smell, taste, flavour and texture cues in the identification of ten vegetables commonly consumed in The Netherlands (broccoli, cauliflower, French bean, leek, bell pepper, carrot, cucumber, iceberg lettuce, onion and tomato)...
November 8, 2017: Appetite
https://www.readbyqxmd.com/read/29101381/hot-carrier-cooling-mechanisms-in-halide-perovskites
#4
Jianhui Fu, Qiang Xu, Guifang Han, Bo Wu, Cheng Hon Alfred Huan, Meng Lee Leek, Tze Chien Sum
Halide perovskites exhibit unique slow hot-carrier cooling properties capable of unlocking disruptive perovskite photon-electron conversion technologies (e.g., high-efficiency hot-carrier photovoltaics, photo-catalysis, and photodetectors). Presently, the origins and mechanisms of this retardation remain highly contentious (e.g., large polarons, hot-phonon bottleneck, acoustical-optical phonon upconversion etc.). Here, we investigate the fluence-dependent hot-carrier dynamics in methylammonium lead triiodide using transient absorption spectroscopy, and correlate with theoretical modeling and first-principles calculations...
November 3, 2017: Nature Communications
https://www.readbyqxmd.com/read/29064558/effect-of-different-light-spectra-on-the-pigmentation-of-stored-elephant-garlic
#5
Diego Comparini, Hieu T H Nguyen, Kota Ueda, Kyoshi Moritaka, Toshihiko Kihara, Kawano Tomonori
BACKGROUND: In the present study high-brightness light emitting diodes (HB-LEDs) have been used to investigate the influence of different light spectra on garlic discoloration at different humidity and temperature. Many processes involved in the discoloration process of garlic/leek during storage at different conditions remain unanswered. For this reason in this study the ability of specific light spectra to enhance the production of desirable pigments has been evaluated in the Elephant Garlic...
October 24, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29053322/strong-coupling-of-microwave-photons-to-antiferromagnetic-fluctuations-in-an-organic-magnet
#6
Matthias Mergenthaler, Junjie Liu, Jennifer J Le Roy, Natalia Ares, Amber L Thompson, Lapo Bogani, Fernando Luis, Stephen J Blundell, Tom Lancaster, Arzhang Ardavan, G Andrew D Briggs, Peter J Leek, Edward A Laird
Coupling between a crystal of di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium radicals and a superconducting microwave resonator is investigated in a circuit quantum electrodynamics (circuit QED) architecture. The crystal exhibits paramagnetic behavior above 4 K, with antiferromagnetic correlations appearing below this temperature, and we demonstrate strong coupling at base temperature. The magnetic resonance acquires a field angle dependence as the crystal is cooled down, indicating anisotropy of the exchange interactions...
October 6, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29042540/circuit-quantum-acoustodynamics-with-surface-acoustic-waves
#7
Riccardo Manenti, Anton F Kockum, Andrew Patterson, Tanja Behrle, Joseph Rahamim, Giovanna Tancredi, Franco Nori, Peter J Leek
The experimental investigation of quantum devices incorporating mechanical resonators has opened up new frontiers in the study of quantum mechanics at a macroscopic level. It has recently been shown that surface acoustic waves (SAWs) can be piezoelectrically coupled to superconducting qubits, and confined in high-quality Fabry-Perot cavities in the quantum regime. Here we present measurements of a device in which a superconducting qubit is coupled to a SAW cavity, realising a surface acoustic version of cavity quantum electrodynamics...
October 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29029732/determination-of-cyanocobalamin-by-isotope-dilution-lc-ms-ms
#8
Lucia D'Ulivo, Lu Yang, Jianfu Ding, Enea Pagliano, Donald M Leek, Marie-Pier Thibeault, Zoltán Mester
Cyanocobalamin (CNCbl) is an active form of vitamin B12, commonly employed for the preparation of multivitamin supplements and fortified food. In this study, we present a novel analytical method for its determination based on stable isotope dilution liquid chromatography electrospray tandem mass spectrometry (ID LC-MS/MS). Isotopically enriched (13)C(15)NCbl was synthesized in-house and used as internal standard. The method was validated using NIST SRM 3280 multivitamin reference material and by comparison with an independent methodology based on LC-ICPMS...
October 16, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29022728/stereo-viewing-modulates-three-dimensional-shape-processing-during-object-recognition-a-high-density-erp-study
#9
Zoe J Oliver, Filipe Cristino, Mark V Roberts, Alan J Pegna, E Charles Leek
The role of stereo disparity in the recognition of 3-dimensional (3D) object shape remains an unresolved issue for theoretical models of the human visual system. We examined this issue using high-density (128 channel) recordings of event-related potentials (ERPs). A recognition memory task was used in which observers were trained to recognize a subset of complex, multipart, 3D novel objects under conditions of either (bi-) monocular or stereo viewing. In a subsequent test phase they discriminated previously trained targets from untrained distractor objects that shared either local parts, 3D spatial configuration, or neither dimension, across both previously seen and novel viewpoints...
October 12, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/29016640/effects-of-aav-mediated-knockdown-of-nnos-and-gpx-1-gene-expression-in-rat-hippocampus-after-traumatic-brain-injury
#10
Deborah R Boone, Jeanna M Leek, Michael T Falduto, Karen E O Torres, Stacy L Sell, Margaret A Parsley, Jeremy C Cowart, Tatsuo Uchida, Maria-Adelaide Micci, Douglas S DeWitt, Donald S Prough, Helen L Hellmich
Virally mediated RNA interference (RNAi) to knock down injury-induced genes could improve functional outcome after traumatic brain injury (TBI); however, little is known about the consequences of gene knockdown on downstream cell signaling pathways and how RNAi influences neurodegeneration and behavior. Here, we assessed the effects of adeno-associated virus (AAV) siRNA vectors that target two genes with opposing roles in TBI pathogenesis: the allegedly detrimental neuronal nitric oxide synthase (nNOS) and the potentially protective glutathione peroxidase 1 (GPx-1)...
2017: PloS One
https://www.readbyqxmd.com/read/28992678/alterations-of-food-specific-serum-igg4-titers-to-common-food-antigens-in-patients-with-irritable-bowel-syndrome
#11
Hong Sub Lee, Kwang Jae Lee
Background/Aims: The role of dietary factors in the pathogenesis of irritable bowel syndrome (IBS) is still unclear. The aim of this study was to compare IgG4 levels to common food antigens between patients with IBS and healthy controls. Methods: Thirty-two patients diagnosed as IBS according to the Rome III criteria (12 diarrhea subgroup; 20 non-diarrhea subgroup) and 32 sex and age-matched healthy controls participated in the study. Serum IgG4 titers to 90 common foods were measured in each subject...
October 30, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/28990821/enrichment-broth-for-the-detection-of-campylobacter-jejuni-and-campylobacter-coli-in-fresh-produce-and-poultry
#12
Youmi Jo, Hye-Min Oh, Yohan Yoon, Sun-Young Lee, Ji-Hyoung Ha, Won-Il Kim, Hwang-Yong Kim, Sanghyun Han, Se-Ri Kim
Although campylobacteriosis caused by Campylobacter jejuni and Campylobacter coli has been increasingly reported worldwide owing to the consumption of contaminated poultry and fresh produce, the current detection protocols are not selective enough to inhibit unspecific microbes other than these pathogens. Five antibiotics were separately added to Bolton broth, and the survival rates of 18 Campylobacter spp. and 79 non-Campylobacter spp. were evaluated. The survival rate of the non-Campylobacter spp. was the lowest in Bolton broth with rifampin (6...
October 9, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28968811/human-parahippocampal-cortex-supports-spatial-binding-in-visual-working-memory
#13
Neil Michael Dundon, Mohammad Zia Ul Haq Katshu, Bronson Harry, Daniel Roberts, E Charles Leek, Paul Downing, Ayelet Sapir, Craig Roberts, Giovanni d'Avossa
Studies investigating the functional organization of the medial temporal lobe (MTL) suggest that parahippocampal cortex (PHC) generates representations of spatial and contextual information used by the hippocampus in the formation of episodic memories. However, evidence from animal studies also implicates PHC in spatial binding of visual information held in short term, working memory. Here we examined a 46-year-old man (P.J.), after he had recovered from bilateral medial occipitotemporal cortex strokes resulting in ischemic lesions of PHC and hippocampal atrophy, and a group of age-matched healthy controls...
September 15, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28948664/fate-of-escherichia-coli-o145-present-naturally-in-bovine-slurry-applied-to-vegetables-before-harvest-after-washing-and-simulated-wholesale-and-retail-distribution
#14
M L Hutchison, D Harrison, J F Heath, J M Monaghan
AIMS: To determine the fate of Escherichia coli on vegetables that were processed through commercial wash treatments and stored under simulated retail conditions at 4°C or wholesale at fluctuating ambient temperatures (0-25°C, dependent on season). METHODS AND RESULTS: Bovine slurry that was naturally contaminated with E. coli O145 was applied without dilution or diluted 1:10 using borehole water to growing potatoes, leeks or carrots. Manure was applied 1 week prior to harvest to simulate a near-harvest contamination event by manure deposition or an application of contaminated water to simulate a flooding event or irrigation from a contaminated water source...
September 26, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28947866/factors-associated-with-gastric-adenocarcinoma-and-dysplasia-in-patients-with-chronic-gastritis-a-population-based-study
#15
Jie Xing, Li Min, Shengtao Zhu, Hao Zhang, Yu Zhao, Hengcun Li, Zheng Zhang, Peng Li, Shutian Zhang
OBJECTIVE: Gastric cancer (GC) is one of the leading causes of death in China and other Asian countries. Recently, gastric endoscopy has become the main approach for GC screening, but the identification of high-risk individuals remains a challenge in GC screening programs. METHODS: There were 7,302 patients with chronic gastritis involved in this study. Endoscopic examinations were performed, and their demographic characteristics and lifestyle data were collected...
August 2017: Chinese Journal of Cancer Research, Chung-kuo Yen Cheng Yen Chiu
https://www.readbyqxmd.com/read/28939233/automatic-single-step-quick-easy-cheap-effective-rugged-and-safe-sample-preparation-devices-for-analysis-of-pesticide-residues-in-foods
#16
Jishi Wang, Zeying He, Lu Wang, Yaping Xu, Yi Peng, Xiaowei Liu
In this research, the manual two-step QuEChERS approach has been streamlined and automated into a one-step method using a cleanup tube fitted within an extraction tube. A novel automatic QuEChERS combination have been developed to simplify the QuEChERS procedures and improve sample preparation efficiency. This combination integrates QuEChERS procedures into a single run via the use of a vortex vibration-centrifuge device and a centrifuge filtration tube. To validate the efficiency of our automatic QuEChERS device, 270 pesticides were analyzed in plant origined foods including celery, tomatoes, leeks, eggplants, grapes, corn, green tea, and soybean oil using this automatic platform...
September 18, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28934004/development-of-functional-composts-using-spent-coffee-grounds-poultry-manure-and-biochar-through-microbial-bioaugmentation
#17
S Aalfin Emmanuel, Jangyeon Yoo, Eok-Jo Kim, Jae-Soo Chang, Young-In Park, Sung-Cheol Koh
Spent coffee grounds (SCG), poultry manure, and agricultural waste-derived biochar were used to manufacture functional composts through microbial bioaugmentation. The highest yield of tomato stalk-based biochar (40.7%) was obtained at 450°C with a surface area of 2.35 m(2) g(-1). Four pilot-scale composting reactors were established to perform composting for 45 days. The ratios of NH4(+)-N/NO3(-)-N, which served as an indicator of compost maturity, indicate rapid, and successful composting via microbial bioaugmentation and biochar amendment...
November 2, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28885539/a-comparison-of-18f-fdg-pet-mr-with-pet-ct-in-pulmonary-tuberculosis
#18
Benjamin A Thomas, James S Molton, Francesca Leek, Yan Pang, John J Totman, Nicholas I Paton, David W Townsend
PURPOSE: PET/computed tomography (CT) has been shown to detect lesions in patients with pulmonary tuberculosis (PTB) and may be useful for assessing PTB disease in clinical research studies. However, radiation dose is of concern for clinical research in individuals with an underlying curable disease. This study aimed to determine whether PET/MR is equivalent to PET/CT in PTB. MATERIALS AND METHODS: Ten patients with microbiologically confirmed PTB were recruited...
November 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28883824/natural-killer-nk-cell-education-differentially-influences-hiv-antibody-dependent-nk-cell-activation-and-antibody-dependent-cellular-cytotoxicity
#19
REVIEW
Nicole F Bernard, Zahra Kiani, Alexandra Tremblay-McLean, Sanket A Kant, Christopher E Leeks, Franck P Dupuy
Immunotherapy using broadly neutralizing antibodies (bNAbs) endowed with Fc-mediated effector functions has been shown to be critical for protecting or controlling viral replication in animal models. In human, the RV144 Thai trial was the first trial to demonstrate a significant protection against HIV infection following vaccination. Analysis of the correlates of immune protection in this trial identified an association between the presence of antibody-dependent cellular cytotoxicity (ADCC) mediated by immunoglobulin G (IgG) antibodies (Abs) to HIV envelope (Env) V1/V2 loop structures and protection from infection, provided IgA Abs with competing specificity were not present...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28867958/relationships-between-bioactive-compound-content-and%C3%A2-the-antiplatelet-and-antioxidant-activities-of-six-allium-vegetable-species
#20
Hebe Vanesa Beretta, Florencia Bannoud, Marina Insani, Federico Berli, Pablo Hirschegger, Claudio Rómulo Galmarini, Pablo Federico Cavagnaro
Allium sp. vegetables are widely consumed for their characteristic flavour. Additionally, their consumption may provide protection against cardiovascular disease due to their antiplatelet and antioxidant activities. Although antiplatelet and antioxidant activities in Allium sp. are generally recognised, comparative studies of antiplatelet and antioxidant potency among the main Allium vegetable species are lacking. Also, the relationship between organosulfur and phenolic compounds and these biological activities has not been well established...
June 2017: Food Technology and Biotechnology
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