Read by QxMD icon Read


Isabella Veríssimo Nader Haddad, Bárbara de Sá-Haiad, Lygia Dolores Ribeiro de Santiago-Fernandes, Silvia Rodrigues Machado
Perfect flowers of Maytenus obtusifolia have partial sterility of pollen grains, resulting in collapsed and developed free microspores. However, the cellular events resulting in partial male sterility have not been determined. In pistillate flowers of this species, male sterility is related to the premature programmed cell death (PCD) in tapetum and sporogenic cells. The process occurs through autophagy via macroautophagy and massive autophagy and is associated with sporophytic cytoplasmic male sterility (CMS)...
December 15, 2018: Protoplasma
Drew C Hayman, R Andrew Shalliker
The performance of a particle packed column will inevitably degrade through use or misadventure. 'Active flow technology' (AFT) is known to greatly improve the performance of pristine columns, but is as of yet untested when used on columns that have degraded significantly. In this study AFT was used to regenerate a degraded column, where the reduced plate height and asymmetry values were 3.5 and 1.25 respectively. Once the AFT fittings were fitted to the column outlet and the flow segmentation ratio adjusted to 28% from the radial central exit port, the reduced plate height decreased to 2...
December 4, 2018: Journal of Chromatography. A
Rui Shi, John Russo, Hajime Tanaka
Water displays a vast array of unique properties, known as water's anomalies, whose origin remains subject to hot debate. Our aim in this article is to provide a unified microscopic physical picture of water's anomalies in terms of locally favored structures, encompassing both thermodynamic and dynamic anomalies, which are often attributed to different origins. We first identify locally favored structures via a microscopic structural descriptor that measures local translational order and provide direct evidence that they have a hierarchical impact on the anomalies...
December 14, 2018: Journal of Chemical Physics
Kunzhou Wang, Bin Wang, Huailiang Li, Xianguo Tuo, Kun Xiong, Minhao Yan, Jérémie Courtois
HYPOTHESIS: Nanoparticles functionalized with ligands which can on-demand and remotely be detached have recently attracted interest as stimuli-responsive materials. Research is now focused on multi-responsive systems, with applications in environmental science and biomedicine. The possibility to covalently couple two different ligands on a single nanoparticles, and to release them independently is investigated. This concept of nanoparticles functionalized with dual on-demand cleavable ligands is exploited in ground water decontamination and radionuclides separation...
December 7, 2018: Journal of Colloid and Interface Science
Tien Tuan Dao
Skeletal muscle forces may be estimated using rigid musculoskeletal models and neural networks. Neural network (NN) approach has the advantages of real-time estimation ability and promising prediction accuracy. However, most of the developed NN models are based on conventional feedforward NNs, which do not take dynamic temporal relationships of the muscle force profiles into consideration. The objectives of this present paper are twofold: (1) to develop a recurrent deep neural network (RDNN) incorporating dynamic temporal relationships to estimate skeletal muscle forces from kinematics data during a gait cycle; (2) then to establish a transfer learning strategy to improve the accuracy of muscle force estimation...
December 14, 2018: Medical & Biological Engineering & Computing
Lindsay S Mayberry, John D Piette, Aaron A Lee, James E Aikens
Adults with type 2 diabetes mellitus (T2DM) often receive self-management support from adult children, siblings or close friends residing outside of their home. However, the role of out-of-home support in patients' self-management and well-being is unclear. Patients (N = 313) with HbA1c > 7.5% were recruited from community primary care clinics for a mobile health intervention trial and identified an out-of-home informal support person, herein called a CarePartner; 38% also had an in-home supporter...
December 14, 2018: Journal of Behavioral Medicine
Maksim Nikitin, Ksenia Deych, Inessa Grevtseva, Natalya Girsova, Maria Kuznetsova, Mikhail Pridannikov, Vitaly Dzhavakhiya, Natalia Statsyuk, Alexander Golikov
Fungal diseases of plants are of great economic importance causing 70⁻80% of crop losses associated with microbial plant pathogens. Advanced on-site disease diagnostics is very important to maximize crop productivity. In this study, diagnostic systems have been developed for simultaneous detection and identification of six fungal pathogens using 48-well microarrays (micromatrices) for qPCR. All oligonucleotide sets were tested for their specificity using 59 strains of target and non-target species. Detection limit of the developed test systems varied from 0...
December 13, 2018: Biosensors
Waseem A Abboud, Maria Krichmar, Daniela Blinder, Alex Dobriyan, Gilad Yahalom, Ran Yahalom
PURPOSE: To evaluate 3-dimensional orofacial changes that occurred after proportional condylectomy that was not followed by orthognathic surgery in patients with condylar hyperplasia type 1B (unilateral hemimandibular elongation). MATERIALS AND METHODS: This retrospective analysis used the medical records of 14 skeletally mature patients. Transverse, vertical, and horizontal cephalometric analyses of photographs and radiographs were undertaken. A comparison of preoperative and postoperative measurements was conducted...
November 20, 2018: Journal of Oral and Maxillofacial Surgery
Lourdes Montes-Jovellar, Alvaro Carrillo, Alfonso Muriel, Rafael Barbera, Fatima Sanchez, Ignacio Cobeta
BACKGROUND: The main objective of this study was to perform the adaptation and cultural translation and validation of the MD Anderson Dysphagia Inventory (MDADI) questionnaire for the Spanish language. METHODS: A total of 69 patients were diagnosed with head and neck cancer treated with surgery; radiotherapy and chemoradiotherapy were included. MDADI was translated and a feasibility, internal consistency, test-retest reliability, and construct validity were assessed...
December 14, 2018: Head & Neck
Emilie Laurin, Diane Morrison, Ian A Gardner, Ahmed Siah, James F F Powell, Mykolas Kamaitis
Renibacterium salmoninarum infection causes bacterial kidney disease (BKD) in salmonid freshwater and saltwater life stages, with potentially severe financial loss for the aquaculture industry. Preventing vertical transmission, from infected broodstock to eggs, is key to disease management. As there is no perfect reference standard for detecting R. salmoninarum, we used Bayesian latent class analyses to compare real-time reverse transcriptase PCR (RT-rPCR, mRNA target) and enzyme-linked immunosorbent assay (ELISA; p57 antigen target) diagnostic accuracy for detection in Atlantic salmon broodstock from British Columbia, Canada, and assessed ELISA repeatability...
December 14, 2018: Journal of Fish Diseases
Matthan W A Caan, Pierre-Louis Bazin, José P Marques, Gilles de Hollander, Serge Dumoulin, Wietske van der Zwaag
Quantitative magnetic resonance imaging generates images of meaningful physical or chemical variables measured in physical units that allow quantitative comparisons between tissue regions and among subjects scanned at the same or different sites. Here, we show that we can acquire quantitative T1 , T2 * , and quantitative susceptibility mapping (QSM) information in a single acquisition, using a multi-echo (ME) extension of the second gradient-echo image of the MP2RAGE sequence. This combination is called MP2RAGE ME, or MP2RAGEME...
December 13, 2018: Human Brain Mapping
Charles E Chambers, Stephen Awuor
This article illustrates the positive impact of fluoroscopic imaging equipment on radiation dose reduction in CTO PCI. The reader should recognize the importance of purchasing and maintaining the best equipment, understanding procedure/patient complexity, and assuring operator training in radiation dose reduction. Future efforts/studies should focus upon all three areas of dose reduction for best results.
December 1, 2018: Catheterization and Cardiovascular Interventions
Lei Zhang, Zeyong Wei, Jinlong Zhang, Huasong Liu, Yiqin Ji, Sven Schröder, Marcus Trost, Zhanshan Wang, Xinbin Cheng
In this Letter, defect-induced scattering in 1064 nm high-reflection coatings prepared by dual ion beam sputtering and its suppression were investigated by artificial nodules, finite-difference time-domain simulations, angular resolved scattering (ARS) measurements, and planarization technology. After establishing the geometric model of the nodules grown from ϕ 1 μm SiO2 microspheres, the far-field scattering of the multiple nodules was determined by intensity superposition. For a nodule density of 100  mm-2 , there is good agreement between the simulated and measured ARS...
December 15, 2018: Optics Letters
Alireza Safaei, Sushrut Modak, Abraham Vázquez-Guardado, Daniel Franklin, Debashis Chanda
Photonic microcavity coupling of a subwavelength hole-disk array, a two-element metal/dielectric composite structure with enhanced extraordinary transmission, leads to 100% coupling of incident light to the cavity system and subsequent absorption. This light-funneling process arises from the temporal and spatial coupling of the broadband localized surface plasmon resonance on the coupled hole-disk array and the photonic modes of the optical cavity, which induces spectral narrowing of the perfect absorption of light...
December 15, 2018: Optics Letters
Ana Roguljic, Gulio Spagnoli, Antonio Juretic, Bozena Sarcevic, Marija Banovic, Lidija Beketic Oreskovic
Cancer/testis antigens (CTAs) are a large family of tumor-associated antigens expressed in human tumors of different histological origin, but not in normal tissues, with the exception of the testes and placenta. Numerous immunohistochemical studies have reported associations between CTA expression and a negative estrogen receptor (ER) status in breast tumors, and demonstrated that CTAs are frequently expressed in tumors with higher nuclear grade. The expression of CTAs has not been studied as extensively in ductal carcinoma in situ (DCIS) as it has been in invasive breast cancer...
December 2018: Oncology Letters
Peng Sun, Charles Chubb, Charles E Wright, George Sperling
Grouping is a perceptual process in which a subset of stimulus components (a group) is selected for a subsequent-typically implicit-perceptual computation. Grouping is a critical precursor to segmenting objects from the background and ultimately to object recognition. Here, we study grouping by color. We present subjects with 300-ms exposures of 12 dots colored with the same but unknown identical color interspersed among 14 dots of seven different colors. To indicate grouping, subjects point-click the remembered centroid ("center of gravity") of the set of homogeneous dots, of heterogeneous dots, or of all dots...
December 13, 2018: Proceedings of the National Academy of Sciences of the United States of America
Ruchitbhai M Shah, Benjamin F Banahan, Erin R Holmes, Amit S Patel, Marie Barnard, Rahul Khanna, John P Bentley
BACKGROUND: This study examined the psychometric properties of version 2 of the SF-12 Health Survey (SF-12v2) among adults with hemophilia in the United States. METHODS: This study employed a cross-sectional design using web-based and paper-based self-administered surveys. Hemophilia patients were recruited using an online panel and at a hemophilia treatment clinic. The psychometric properties of the SF-12v2 were assessed in terms of construct validity, internal consistency reliability, and presence of floor and ceiling effects...
December 13, 2018: Health and Quality of Life Outcomes
James K Elrod, John L Fortenberry
BACKGROUND: Target marketing, a practice used to more effectively address the wants and needs of customers, involves three interrelated activities: market segmentation, targeting, and product positioning. The practice follows a perfectly logical process. For a given offering, healthcare institutions select a desired group to pursue and arrange service characteristics and related attributes in a manner to entice that particular group to forward patronage and become customers. Pursuits often focus on heavily-traveled routes teeming with competitors, but occasionally an off the beaten path can be identified to amplify target marketing efforts...
December 14, 2018: BMC Health Services Research
Chucai Guo, Jianfa Zhang, Wei Xu, Ken Liu, Xiaodong Yuan, Shiqiao Qin, Zhihong Zhu
Graphene has unique properties which make it an ideal material for photonic and optoelectronic devices. However, the low light absorption in monolayer graphene seriously limits its practical applications. In order to greatly enhance the light absorption of graphene, many graphene-based structures have been developed to achieve perfect absorption of incident waves. In this review, we discuss and analyze various types of graphene-based perfect absorption structures in the visible to terahertz band. In particular, we review recent advances and optoelectronic applications of such structures...
December 12, 2018: Nanomaterials
(no author information available yet)
OBJECTIVEStereotactic radiosurgery (SRS) is characterized by high levels of conformity and steep dose gradients from the periphery of the target to surrounding tissue. Clinical studies have backed up the importance of these factors through evidence of symptomatic complications. Available data suggest that there are threshold doses above which the risk of symptomatic radionecrosis increases with the volume irradiated. Therefore, radiosurgical treatment plans should be optimized by minimizing dose to the surrounding tissue while maximizing dose to the target volume...
December 1, 2018: Journal of Neurosurgery
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"