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https://www.readbyqxmd.com/read/28535658/-value-of-the-endoscopic-diagnosis-on-the-lesions-of-the-skull-base-in-postradiotherapeutic-patients-with-nasopharyngeal-carcinoma
#1
J Y Lyu, F Y Liang, P Han, X M Huang
Objective: To evaluate the diagnostic value of the endoscopic biopsy operation to the lesions of the skull base in the patients with nasopharyngealcarcinoma after radiotherapy. Methods: From February 2006 to February 2010, 84 patients with nasopharyngeal carcinoma suffered from the lesions of the skull base after radiotherapy were included in this study. The relationship between the pathologic results of endoscopic biopsies from the skull base and the imaging results by Magnetic Resonance Imaging(MRI) was compared and discussed...
May 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28535281/the-relationship-between-surface-area-and-volume-of-common-blow-fly-diptera-calliphoridae-oviposition-sites-and-carrion-body-mass
#2
V A Pacheco, K R Hans, S L VanLaerhoven
Female blow flies (Diptera: Calliphoridae) demonstrate site preferences when ovipositing on carrion. Preference for oviposition sites is believed to reflect the suitability of the site such that the most preferred locations provide offspring with the greatest chance of survival. A number of factors might influence female choice, including area available for oviposition. For species known to aggregate during oviposition, the surface area of oviposition sites may be a key factor in the decision-making process...
May 23, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28534789/boundary-eliminated-pseudoinverse-linear-discriminant-for-imbalanced-problems
#3
Yujin Zhu, Zhe Wang, Hongyuan Zha, Daqi Gao
Existing learning models for classification of imbalanced data sets can be grouped as either boundary-based or nonboundary-based depending on whether a decision hyperplane is used in the learning process. The focus of this paper is a new approach that leverages the advantage of both approaches. Specifically, our new model partitions the input space into three parts by creating two additional boundaries in the training process, and then makes the final decision based on a heuristic measurement between the test sample and a subset of selected training samples...
May 16, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28534229/production-of-a-gonadotropin-releasing-hormone-2-receptor-knockdown-gnrhr2-kd-swine-line
#4
A T Desaulniers, R A Cederberg, G A Mills, C A Lents, B R White
Swine are the only livestock species that produce both the second mammalian isoform of gonadotropin-releasing hormone (GNRH2) and its receptor (GNRHR2). Previously, we reported that GNRH2 and GNRHR2 mediate LH-independent testosterone secretion from porcine testes. To further explore this ligand-receptor complex, a pig model with reduced GNRHR2 expression was developed. Small hairpin RNA sequences targeting porcine GNRHR2 were subcloned into a lentiviral-based vector, lentiviral particles were generated and microinjected into the perivitelline space of zygotes, and embryos were transferred into a recipient...
May 22, 2017: Transgenic Research
https://www.readbyqxmd.com/read/28533911/hepatic-encephalopathy
#5
Peter Ferenci
Hepatic encephalopathy (HE) is a reversible syndrome of impaired brain function occurring in patients with advanced liver diseases. The precise pathophysiology of HE is still under discussion; the leading hypothesis focus on the role of neurotoxins, impaired neurotransmission due to metabolic changes in liver failure, changes in brain energy metabolism, systemic inflammatory response and alterations of the blood brain barrier. HE produces a wide spectrum of nonspecific neurological and psychiatric manifestations...
May 2017: Gastroenterology Report
https://www.readbyqxmd.com/read/28533825/in-situ-mems-testing-correlation-of-high-resolution-x-ray-diffraction-with-mechanical-experiments-and-finite-element-analysis
#6
REVIEW
Andreas Schifferle, Alex Dommann, Antonia Neels
New methods are needed in microsystems technology for evaluating microelectromechanical systems (MEMS) because of their reduced size. The assessment and characterization of mechanical and structural relations of MEMS are essential to assure the long-term functioning of devices, and have a significant impact on design and fabrication. Within this study a concept for the investigation of mechanically loaded MEMS materials on an atomic level is introduced, combining high-resolution X-ray diffraction (HRXRD) measurements with finite element analysis (FEA) and mechanical testing...
2017: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/28532643/reprint-of-a-new-approach-to-analyze-data-from-eeg-based-concealed-face-recognition-system
#7
A H Mehrnam, A M Nasrabadi, Mahrad Ghodousi, A Mohammadian, Sh Torabi
The purpose of this study is to extend a feature set with non-linear features to improve classification rate of guilty and innocent subjects. Non-linear features can provide extra information about phase space. The Event-Related Potential (ERP) signals were recorded from 49 subjects who participated in concealed face recognition test. For feature extraction, at first, several morphological characteristics, frequency bands, and wavelet coefficients (we call them basic-features) are extracted from each single-trial ERP...
May 19, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28530803/red-phosphorus-nano-dots-on-reduced-graphene-oxide-as-a-flexible-and-ultra-fast-anode-for-sodium-ion-batteries
#8
Yihang Liu, Anyi Zhang, Chenfei Shen, Qingzhou Liu, Xuan Cao, Yuqiang Ma, Liang Chen, Christian Lau, Tian-Chi Chen, Fei Wei, Chongwu Zhou
Sodium-ion batteries offer an attractive option for potential low cost and large scale energy storage due to the earth abundance of sodium. Red phosphorus is considered as a high capacity anode for sodium-ion batteries with a theoretical capacity of 2596 mAh/g. However, similar to silicon in lithium-ion batteries, several limitations such as large volume expansion upon sodiation/de-sodiation and low electronic conductance have severely limited the performance of red phosphorus anodes. In order to address the above challenges, we have developed a method to deposit red phosphorus nano-dots densely and uniformly onto reduced graphene oxide sheets (P@RGO) to minimize the sodium ion diffusion length and the sodiation/de-sodiation stresses, and the RGO network also serves as electron pathway and creates free space to accommodate the volume variation of phosphorus particles...
May 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28529688/the-prevalence-temporal-and-spatial-trends-in-bulk-tank-equivalent-milk-fat-depression-in-irish-milk-recorded-herds
#9
Catherine I Carty, Alan G Fahey, Morgan R Sheehy, Steve Taylor, Ian J Lean, Conor G McAloon, Luke O'Grady, Finbar J Mulligan
BACKGROUND: Milk fat is important in terms of economic value and in its potential to provide information concerning cow diet and health. Under current milk payment schemes in Ireland farmer income is directly linked to milk fat production. METHODS: A descriptive analysis of milk fat depression (MFD) as calculated from test day milk recording data across all milk recording herds from 2004 to 2014 was undertaken. A dataset of 17 million test day records was used to calculate the prevalence of MFD in Irish milk recorded herds and to create a graphical description of the major descriptive epidemiological trends in milk fat depression in time and space in Ireland...
2017: Irish Veterinary Journal
https://www.readbyqxmd.com/read/28529445/regression-models-on-riemannian-symmetric-spaces
#10
Emil Cornea, Hongtu Zhu, Peter Kim, Joseph G Ibrahim
The aim of this paper is to develop a general regression framework for the analysis of manifold-valued response in a Riemannian symmetric space (RSS) and its association with multiple covariates of interest, such as age or gender, in Euclidean space. Such RSS-valued data arises frequently in medical imaging, surface modeling, and computer vision, among many others. We develop an intrinsic regression model solely based on an intrinsic conditional moment assumption, avoiding specifying any parametric distribution in RSS...
March 2017: Journal of the Royal Statistical Society. Series B, Statistical Methodology
https://www.readbyqxmd.com/read/28529253/relationship-between-blurring-and-refocus-flip-angle-in-3d-double-inversion-recovery-mri
#11
Tomoyuki Wada, Norio Hayashi, Shunichi Motegi, Hiroyuki Nagase, Kouichi Ujita, Akio Ogura, Toshihiro Ogura, Takehiro Shimada, Yoshito Tsushima
It is important to optimize imaging parameters in 3D-double inversion recovery (DIR) magnetic resonance imaging (MRI) for detecting cortical micro lesions. However, inadequate parameters markedly raise blurring in 3DDIR MRI. The purpose of this study was to evaluate the relationship between the blurring and refocus flip angle (RFA) in 3D-DIR MRI. White matter attenuated inversion recovery (WAIR) images as a test sample were obtained by 1.5T MRI with various RFA settings (30°, 40°, 60°, 100°, 140°, 180°, and variable refocus flip angle (VRFA))...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28529149/autotransplantation-of-third-molars-with-platelet-rich-plasma-for-immediate-replacement-of-extracted-non-restorable-teeth-a-case-series
#12
Jorge Gonzalez-Ocasio, Mark Stevens
PURPOSE: The aim of this study was to examine the use of platelet-rich plasma (PRP) for autotransplantation of third molars as a successful technique to provide immediate tooth structure for space maintenance and masticatory function when premature loss of a permanent tooth occurs and other dental restorative options are not indicated. MATERIALS AND METHODS: This study included 10 healthy patients 10 to 17 years of age with at least 1 immature third molar (one to two thirds of root formation) used to replace extracted non-restorable teeth...
April 25, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28528095/structural-and-mechanical-properties-of-organogels-role-of-oil-and-gelator-molecular-structure
#13
Miguel A Cerqueira, Luiz H Fasolin, Carolina S F Picone, Lorenzo M Pastrana, Rosiane L Cunha, António A Vicente
This work aims at evaluating the influence of oil and gelator structure on organogels' properties through rheological measurements, polarized microscopy and small-angle X-ray scattering (SAXS). Four different food-grade gelators (glyceryl tristearate - GT; sorbitan tristearate - ST; sorbitan monostearate - SM and glyceryl monostearate - GM) were tested in medium-chain triglyceride and high oleic sunflower (MCT and LCT, respectively) oil phases. Organogels were prepared by mixing the oil phase and gelator at different concentrations (5, 10, 15, 20 and 25%) at 80°C during 30min...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28527844/evaluation-of-various-pretreatments-to-fiber-post-on-the-push-out-bond-strength-of-root-canal-dentin
#14
Ömer Kırmalı, Özlem Üstün, Alper Kapdan, Alper Kuştarcı
INTRODUCTION: The aim of this in vitro study was to compare the effect of different pretreatments (fiber post) with the laser-activated irrigation (LAI) technique (for removal of the smear layer) on root canal dentin in terms of push-out bond strength (PBS) in a fiber post. METHODS: Fifty freshly extracted mandibular single-rooted premolars were prepared, and LAI was applied to all roots (17% EDTA was 5 mL for 120 seconds with an erbium, chromium:yttrium-scandium-gallium-garnet laser [0...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527749/visual-and-proprioceptive-feedback-differently-modulate-the-spatial-representation-of-number-and-time-in-children
#15
Elena Nava, Luca Rinaldi, Hermann Bulf, Viola Macchi Cassia
There has been compelling evidence favoring the idea that human adults similarly represent number and time along a horizontal mental number line (MNL) and mental time line (MTL), respectively. Yet, analogies drawn between the MNL and MTL have been challenged by recent studies suggesting that adults' representations of number and time arise from different spatial frames of reference; whereas the MNL relies on both hand-centered and object-centered coordinates, the MTL appears to be exclusively anchored on object-centered coordinates...
May 18, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28527648/a-case-of-amebiasis-with-negative-serologic-markers-that-caused-intra-abdominal-abscess
#16
Rie Tanaka, Norihiro Furusyo, Rinne Takeda, Sho Yamasaki, Akira Kusaga, Eiichi Ogawa, Masayuki Murata, Ryota Nakanishi, Yoshihiko Maehara
A 23-year-old Japanese woman presented with abdominal distention following fever, diarrhea, and abdominal pain during a stay in Taiwan. Serology for the detection of amebic-antibodies and stool microscopic examination were both negative. A computed tomography scan showed a 13 cm diameter abscess spreading from the lower abdominal wall to the pelvic retroperitoneal space. Needle aspiration of the abscess was done under computed tomography guidance, and microscopy of the aspirated fluid revealed trophozoites of Entamoeba...
May 17, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28525476/magnetic-resonance-classification-system-of-cervical-intervertebral-disk-degeneration-its-validity-and-meaning
#17
Akinobu Suzuki, Michael D Daubs, Tetsuo Hayashi, Monchai Ruangchainikom, Chenjie Xiong, Kevin Phan, Trevor P Scott, Jeffery C Wang
STUDY DESIGN: Retrospective analysis of kinetic magnetic resonance images (kMRIs). OBJECTIVE: (1) To analyze the changes seen on MRI related to disk degeneration and to develop a new grading system for cervical disk degeneration. (2) To evaluate the reliability and validity of the grading system. SUMMARY OF BACKGROUND DATA: Few have studied the relationship between changes seen on MRI with cervical disk degeneration and the chronological order of disk degeneration...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28525470/factors-affecting-the-nonlinear-force-versus-distraction-height-curves-in-an-in-vitro-c5-c6-anterior-cervical-distraction-model
#18
Junxiang Wen, Jianwei Xu, Lijun Li, Mingjie Yang, Jie Pan, Deyu Chen, Lianshun Jia, Jun Tan
STUDY DESIGN: In vitro biomechanical study of cervical intervertebral distraction. OBJECTIVE: To investigate the forces required for distraction to different heights in an in vitro C5-C6 anterior cervical distraction model, focusing on the influence of the intervertebral disk, posterior longitudinal ligament (PLL), and ligamentum flavum (LF). SUMMARY OF BACKGROUND DATA: No previous studies have reported on the forces required for distraction to various heights or the factors resisting distraction in anterior cervical discectomy and fusion...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28524797/the-relationship-of-dose-to-nerve-volume-in-predicting-pain-recurrence-after-stereotactic-radiosurgery-in-trigeminal-neuralgia
#19
Amparo Wolf, Amy Tyburczy, Jason Chao Ye, Girish Fatterpekar, Joshua S Silverman, Douglas Kondziolka
OBJECTIVE Approximately 75%-92% of patients with trigeminal neuralgia (TN) achieve pain relief after Gamma Knife surgery (GKS), although a proportion of these patients will experience recurrence of their pain. To evaluate the reasons for durability or recurrence, this study determined the impact of trigeminal nerve length and volume, the nerve dose-volume relationship, and the presence of neurovascular compression (NVC) on pain outcomes after GKS for TN. METHODS Fifty-eight patients with 60 symptomatic nerves underwent GKS for TN between 2013 and 2015, including 15 symptomatic nerves secondary to multiple sclerosis (MS)...
May 19, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28523954/photometric-cielab-analysis-of-the-gingiva-a-novel-approach-to-assess-response-to-periodontal-therapy
#20
Yaniv Mayer, Ofir Ginesin, Eli E Machtei
OBJECTIVE: A new photometric method is introduced for the assessment of the gingival condition and changes following periodontal therapy. MATERIAL AND METHODS: Clinical data (probing depth, plaque index, gingival index, bleeding on probing, clinical attachment level) and photographs from 53 subjects (49% males, 51% females) undergoing initial periodontal treatment were used for this analysis. Each maxillary anterior area was photographed before treatment and three months after...
May 19, 2017: Journal of Periodontology
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