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https://www.readbyqxmd.com/read/29677675/nitrogen-use-efficiency-and-crop-production-patterns-of-regional-variation-in-the-united-states-1987-2012
#1
Dennis P Swaney, Robert W Howarth, Bongghi Hong
National-level summaries of crop production and nutrient use efficiency, important for international comparisons, only partially elucidate agricultural dynamics within a country. Agricultural production and associated environmental impacts in large countries vary significantly because of regional differences in crops, climate, resource use and production practices. Here, we review patterns of regional crop production, nitrogen use efficiency (NUE), and major inputs of nitrogen to US crops over 1987-2012, based on the Farm Resource Regions developed by the Economic Research Service (USDA-ERS)...
April 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29677637/the-prevalence-of-molecular-markers-of-drug-resistance-in-plasmodium-vivax-from-the-border-regions-of-thailand-in-2008-and-2014
#2
Kritpaphat Tantiamornkul, Tepanata Pumpaibool, Jittima Piriyapongsa, Richard Culleton, Usa Lek-Uthai
The prevalence of Plasmodium vivax is increasing in the border regions of Thailand; one potential problem confounding the control of malaria in these regions is the emergence and spread of drug resistance. The aim of this study was to determine the genetic diversity in genes potentially linked to drug resistance in P. vivax parasites isolated from four different border regions of Thailand; Thai-Myanmar (Tak, Mae Hong Son and Prachuap Khiri Khan Provinces), and Thai-Cambodian borders (Chanthaburi Province). Isolates were collected from 345 P...
April 12, 2018: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/29677528/low-arsenic-bioaccessibility-by-fixation-in-nanostructured-iron-hydr-oxides-quantitative-identification-of-as-bearing-phases
#3
Virginia S T Ciminelli, Daphne C Antônio, Claudia L Caldeira, Erico T F Freitas, Itamar Daniel Delbem, Marcus M Fernandes, Massimo Gasparon, Jack C Ng
A new analytical protocol was developed to provide quantitative, single-particle identification of arsenic in heterogeneous nanoscale mineral phases in soil samples, with a view to establishing its potential risk to human health. Microscopic techniques enabled quantitative, single-particle identification of As-bearing phases in twenty soil samples collected in a gold mining district with arsenic concentrations in range of 8 to 6354 mg kg-1 . Arsenic is primarily observed in association with iron (hydr) oxides in fine intergrowth with phyllosilicates...
March 29, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29677367/stable-microsaccades-and-microsaccade-induced-global-alpha-band-phase-reset-across-the-life-span
#4
Ying Gao, Carl Huber, Bernhard A Sabel
Purpose: To understand the effect of aging on microsaccade functions and brain physiologic responses, we quantified microsaccades and their physiologic correlates (including their interaction with alpha band brain oscillation) in normal subjects of different ages. Methods: Twenty-two normally sighted young (18 to 29 years), 22 middle-aged (31 to 55 years), and 22 elderly subjects (56 to 77 years) participated in this cross-sectional study. Dense array EEG and high-resolution eye-tracking data were simultaneously recorded during a fixation task...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29677336/both-saccadic-and-manual-responses-in-the-amblyopic-eye-of-strabismics-are-irreducibly-delayed
#5
Christina Gambacorta, Jian Ding, Suzanne P McKee, Dennis M Levi
Abnormal early visual development can result in a constellation of neural and visual deficits collectively known as amblyopia. Among the many deficits, a common finding is that both saccadic and manual reaction times to targets presented to the amblyopic eye are substantially delayed when compared to the fellow eye or to normal eyes. Given the well-known deficits in contrast sensitivity in the amblyopic eye, a natural question is whether the prolonged reaction times are simply a consequence of reduced stimulus visibility...
March 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29677335/the-eye-tracks-the-aesthetic-appeal-of-sentences
#6
Hideyuki Hoshi, Winfried Menninghaus
Eye-tracking parameters (fixation and pupillary responses) have been shown to be modulated by the aesthetic perception and evaluation of visual and auditory artworks (e.g., paintings, music). The present study investigated whether similar effects can be found in visual text processing. Participants read four groups of short sentences in which a key predictor of aesthetic liking, i.e., familiarity, was systematically modified to four degrees. Across all four groups, the sentences moreover varied with regard to featuring or not featuring meter...
March 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29677334/monocular-microsaccades-do-they-really-occur
#7
Yu Fang, Christopher Gill, Martina Poletti, Michele Rucci
Small saccades, known as microsaccades, occur frequently during fixation. Several recent studies have argued that a considerable fraction of these movements are present in the traces from one eye only. This claim contrasts with the findings of older reports, which concluded that microsaccades, like larger saccades, are virtually always binocular events. Here we examined the characteristics of small saccades by means of two of the most established high-resolution eye-tracking techniques available. A binocular Dual Purkinje Image eye-tracker was used to record eye movements while observers fixated, with their head immobilized, on markers displayed on a monitor...
March 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29677321/probing-the-temporal-dynamics-of-the-exploration-exploitation-dilemma-of-eye-movements
#8
Benedikt V Ehinger, Lilli Kaufhold, Peter König
When scanning a visual scene, we are in a constant decision process regarding whether to further exploit the information content at the current fixation or to go on and explore the scene. The balance of these two processes determines the distribution of fixation durations. Using a gaze-contingent paradigm, we experimentally interrupt this process to probe its state. Here, we developed a guided-viewing task where only a single 3° aperture of an image ("bubble") is displayed. Subjects had to fixate the bubble for an experimentally controlled time (forced fixation time)...
March 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29677302/effect-of-uterosacral-ligament-suspension-vs-sacrospinous-ligament-fixation-with-or-without-perioperative-behavioral-therapy-for-pelvic-organ-vaginal-prolapse-on-surgical-outcomes-and-prolapse-symptoms-at-5-years-in-the-optimal-randomized-clinical-trial
#9
J Eric Jelovsek, Matthew D Barber, Linda Brubaker, Peggy Norton, Marie Gantz, Holly E Richter, Alison Weidner, Shawn Menefee, Joseph Schaffer, Norma Pugh, Susan Meikle
Importance: Uterosacral ligament suspension (ULS) and sacrospinous ligament fixation (SSLF) are commonly performed pelvic organ prolapse procedures despite a lack of long-term efficacy data. Objective: To compare outcomes in women randomized to (1) ULS or SSLF and (2) usual care or perioperative behavioral therapy and pelvic floor muscle training (BPMT) for vaginal apical prolapse. Design, Setting, and Participants: This 2 × 2 factorial randomized clinical trial was conducted at 9 US medical centers...
April 17, 2018: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29677093/a-prospective-randomized-trial-to-assess-fixation-strategies-for-severe-open-tibia-fractures-modern-ring-external-fixators-versus-internal-fixation-fixit-study-erratum
#10
(no author information available yet)
No abstract text is available yet for this article.
May 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29677091/factors-associated-with-revision-surgery-after-internal-fixation-of-hip-fractures
#11
Sheila Sprague, Emil H Schemitsch, Marc Swiontkowski, Gregory J Della Rocca, Kyle J Jeray, Susan Liew, Gerard P Slobogean, Sofia Bzovsky, Diane Heels-Ansdell, Qi Zhou, Mohit Bhandari
BACKGROUND: Femoral neck fractures are associated with high rates of revision surgery after management with internal fixation. Using data from the Fixation using Alternative Implants for the Treatment of Hip fractures (FAITH) trial evaluating methods of internal fixation in patients with femoral neck fractures, we investigated associations between baseline and surgical factors and the need for revision surgery to promote healing, relieve pain, treat infection or improve function over 24 months postsurgery...
May 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29676826/epidermal-auxin-biosynthesis-facilitates-rhizobial-infection-in-lotus-japonicus
#12
Marcin Nadzieja, Simon Kelly, Jens Stougaard, Dugald Reid
Symbiotic nitrogen fixation in legumes requires nodule organogenesis to be coordinated with infection by rhizobia. The plant hormone auxin influences symbiotic infection, but the precise timing of auxin accumulation and the genetic network governing it remain unclear. We used a Lotus japonicus optimised variant of the DII-based auxin accumulation sensor and identify a rapid accumulation of auxin in the epidermis, specifically in the root hair cells. This auxin accumulation occurs in the infected root hairs during rhizobia invasion, while Nod factor application induces this response across a broader range of root hairs...
April 20, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29676458/an-optimized-method-to-measure-human-foxp3-regulatory-t-cells-from-multiple-tissue-types-using-mass-cytometry
#13
Nicholas A J Dawson, Avery J Lam, Laura Cook, Romy E Hoeppli, Raewyn Broady, Anne M Pesenacker, Megan K Leving
Mass cytometry has facilitated the discovery of complex immunological networks and immune cell interactions; however, there are limited reports of using this technology to measure expression of intranuclear antigens such as transcription factors. Herein we describe testing of multiple staining methods to detect FOXP3, the lineage-defining transcription factor for regulatory T cells (Tregs), by mass cytometry. A custom paraformaldehyde/saponin-based fixation and permeabilization method was found to be the optimal method for mass cytometry-based Treg detection, yielding the best balance of FOXP3 detection and preserved cell surface marker expression...
April 20, 2018: European Journal of Immunology
https://www.readbyqxmd.com/read/29675628/-perilunate-injuries
#14
REVIEW
C Riexinger, P Laier
Perilunate injuries are one of the most severe injuries of the hand. They occur relatively rarely but necessitate that diagnostic procedures should be carried out thoroughly and as soon as possible. The therapeutic strategy must consider the age, exact type and full extent of the injury. The key for successful treatment is exact anatomic reduction and stable fixation of all injured structures.
April 19, 2018: Der Unfallchirurg
https://www.readbyqxmd.com/read/29675508/are-trabecular-metal-cones-a-valid-option-to-treat-metaphyseal-bone-defects-in-complex-primary-and-revision-knee-arthroplasty
#15
REVIEW
Tommaso Bonanzinga, Thorsten Gehrke, Akos Zahar, Stefano Zaffagnini, Maurilio Marcacci, Carl Haasper
Purpose  Metaphyseal bone defects are a challenge in complex primary and revision total knee arthroplasty (TKA). Recently, several studies have been published with promising results about the use of Trabecular Metal (TM) cones to address bone defects. The aim of this study is to review the literature to assess the efficacy of TM cones to address metaphyseal bone loss. Methods  A comprehensive search was performed on PubMed, Medline, CINAHL, Cochrane, Embase, and Google Scholar databases using various combinations of the following keywords: "metaphyseal," "cones," "tantalum," "knee," and "revision...
March 2018: Joints
https://www.readbyqxmd.com/read/29675427/transvaginal-bilateral-sacrospinous-fixation-after-second-recurrence-of-vaginal-vault-prolapse-efficacy-and-impact-on-quality-of-life-and-sexuality
#16
Salvatore Giovanni Vitale, Antonio Simone Laganà, Marco Noventa, Pierluigi Giampaolino, Brunella Zizolfi, Salvatore Butticè, Valentina Lucia La Rosa, Giuseppe Gullo, Diego Rossetti
Objective: Our aim was to study the efficacy of transvaginal bilateral sacrospinous fixation (TBSF) and its impact on quality of life (QoL) and sexual functions in women affected by second recurrences of vaginal vault prolapse (VVP). Materials and Methods: We performed a prospective observational study on 20 sexually active patients affected by second recurrence of VVP, previously treated with monolateral sacrospinous fixation. TBSF was performed in all the patients...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29674998/distributions-and-abundances-of-sublineages-of-the-n-2-fixing-cyanobacterium-candidatus-atelocyanobacterium-thalassa-ucyn-a-in-the-new-caledonian-coral-lagoon
#17
Britt A Henke, Kendra A Turk-Kubo, Sophie Bonnet, Jonathan P Zehr
Nitrogen (N2 ) fixation is a major source of nitrogen that supports primary production in the vast oligotrophic areas of the world's oceans. The Western Tropical South Pacific has recently been identified as a hotspot for N2 fixation. In the Noumea lagoon (New Caledonia), high abundances of the unicellular N2 -fixing cyanobacteria group A (UCYN-A), coupled with daytime N2 fixation rates associated with the <10 μm size fraction, suggest UCYN-A may be an important diazotroph (N2 -fixer) in this region. However, little is known about the seasonal variability and diversity of UCYN-A there...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29674178/dawn-of-astome-ciliates-in-light-of-morphology-and-time-calibrated-phylogeny-of-haptophrya-planariarum-an-obligate-endosymbiont-of-freshwater-turbellarians
#18
Matej Rataj, Peter Vďačný
Morphology, systematic position and time-calibrated phylogeny of Haptophrya planariarum were investigated. This endosymbiont of freshwater turbellarians is characterized by: (i) a length of about 200-900 μm; (ii) a campanulate to truncate claviform body carrying an anterior adhesive sucker; (iii) an ellipsoidal macronucleus localized in the rear body end; (iv) a contractile canal extending along the dorsal margin; and (v) usually more than 150 meridional ciliary rows, a horseshoe-shaped suture line along the sucker, and two inconspicuous secant systems at lateral ends of the suture line...
April 5, 2018: European Journal of Protistology
https://www.readbyqxmd.com/read/29673972/microalgae-as-multi-functional-options-in-modern-agriculture-current-trends-prospects-and-challenges
#19
REVIEW
Nirmal Renuka, Abhishek Guldhe, Radha Prasanna, Poonam Singh, Faizal Bux
Algae are a group of ubiquitous photosynthetic organisms comprising eukaryotic green algae and Gram-negative prokaryotic cyanobacteria, which have immense potential as a bioresource for various industries related to biofuels, pharmaceuticals, nutraceuticals and feed. This fascinating group of organisms also has applications in modern agriculture through facilitating increased nutrient availability, maintaining the organic carbon and fertility of soil, and enhancing plant growth and crop yields, as a result of stimulation of soil microbial activity...
April 16, 2018: Biotechnology Advances
https://www.readbyqxmd.com/read/29673708/fractographic-analyses-of-failed-one-piece-zirconia-implant-restorations
#20
Marit Øilo, Dwayne Arola
BACKGROUND: Promising results of initial clinical trials with yttria-stabilized zirconia have led to more extensive use of zirconia in dental implant superstructures. The applications have extended to abutments and complex individually designed crown-abutment one-piece structures. Little is known about their clinical success and the primary cause of failures. PURPOSE: The aim of this study was to identify the cause of fracture of retrieved implant-retained one-piece prostheses that failed during clinical use...
April 16, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
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