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https://www.readbyqxmd.com/read/29443501/magnetically-actuated-peanut-colloid-motors-for-cell-manipulation-and-patterning
#1
Zhihua Lin, Xinjian Fan, Mengmeng Sun, Changyong Gao, Qiang He, Hui Xie
We report a magnetically-actuated, peanut-shaped hematite colloid motor that can not only move in a rolling or wobbling mode in fluids but also perform single-cell manipulation and patterning in a non-contact manner. The peanut motor in the rolling mode can reach a maximal velocity of 10.6 μm s-1 under a rotating magnetic field of 130 Hz and 6.3 mT and can achieve a more precisely controllable motion in predefined tracks. By comparison, the peanut motor in the wobbling mode can reach a maximal velocity of 14...
February 14, 2018: ACS Nano
https://www.readbyqxmd.com/read/29435751/impact-of-anatomical-position-of-the-pancreas-on-postoperative-complications-and-drain-amylase-concentrations-after-laparoscopic-distal-gastrectomy-for-gastric-cancer
#2
Koshi Kumagai, Naoki Hiki, Souya Nunobe, Satoshi Kamiya, Masahiro Tsujiura, Satoshi Ida, Manabu Ohashi, Toshiharu Yamaguchi, Takeshi Sano
BACKGROUND: Laparoscopic surgery for gastric cancer requires traction or compression of the pancreas, with the extent depending on the anatomical position of the pancreas. This study investigated the impact of the position of the pancreas on postoperative complications and drain amylase concentrations after laparoscopic distal gastrectomy (LDG). METHODS: Gastric cancer patients who underwent LDG were assessed retrospectively. The following anatomical parameters were measured retrospectively in preoperative computed tomography sagittal projections: the length of the vertical line between the pancreas and the aorta (P-A length), representing the height of the slope looking down the celiac artery from the top of the pancreas, and the angle between a line drawn from the upper border of the pancreas to the root of the celiac artery and the aorta (UP-CA angle), representing the steepness of the slope...
February 12, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29399434/steep-switching-devices-for-low-power-applications-negative-differential-capacitance-resistance-field-effect-transistors
#3
REVIEW
Eunah Ko, Jaemin Shin, Changhwan Shin
Simply including either single ferroelectric oxide layer or threshold selector, we can make conventional field effect transistor to have super steep switching characteristic, i.e., sub-60-mV/decade of subthreshold slope. One of the representative is negative capacitance FET (NCFET), in which a ferroelectric layer is added within its gate stack. The other is phase FET (i.e., negative resistance FET), in which a threshold selector is added to an electrode (e.g., source or drain) of conventional field effect transistor...
2018: Nano Convergence
https://www.readbyqxmd.com/read/29366328/stream-mercury-export-in-response-to-contemporary-timber-harvesting-methods-pacific-coastal-mountains-oregon-usa
#4
Chris S Eckley, Collin Eagles-Smith, Michael T Tate, Brandon Kowalski, Robert Danehy, Sherri L Johnson, David P Krabbenhoft
Land-use activities can alter hydrological and biogeochemical processes that can affect the fate, transformation, and transport of mercury (Hg). Previous studies in boreal forests have shown that forestry operations can have profound but variable effects on Hg export and methylmercury (MeHg) formation. The Pacific Northwest is an important timber producing region that receives large atmospheric Hg loads, but the impact of forest harvesting on Hg mobilization has not been directly studied and was the focus of our investigation...
February 7, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29346531/doppler-assessment-of-aortic-stenosis-a-25-operator-study-demonstrating-why-reading-the-peak-velocity-is-superior-to-velocity-time-integral
#5
Stefania Sacchi, Niti M Dhutia, Matthew J Shun-Shin, Massoud Zolgharni, Nilesh Sutaria, Darrel P Francis, Graham D Cole
Aims: Measurements with superior reproducibility are useful clinically and research purposes. Previous reproducibility studies of Doppler assessment of aortic stenosis (AS) have compared only a pair of observers and have not explored the mechanism by which disagreement between operators occurs. Using custom-designed software which stored operators' traces, we investigated the reproducibility of peak and velocity time integral (VTI) measurements across a much larger group of operators and explored the mechanisms by which disagreement arose...
January 15, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29318846/-a-survey-on-ecological-environment-of-wild-adiantum-reniforme-var-sinense-in-three-gorges-reservoir-region
#6
Zhong-de Xie, Han Jia, Shao-Zhi Fu, Wen-Yuan Gao, Zhi-Wei Zhang, Wei Sun
The study aims at investigating the ecological environment Adiantum reniforme var. sinense of in Three Gorges Reservoir region, and providing a reference basis for the protection of resources and artificial cultivation of A. reniforme var. sinense. By using the method of investigation, field survey and experimental analysis, the vegetation, natural geographical environment, climate, soil nutrients of A. reniforme var. sinense were studied and analyzed. The survey found that A. reniforme var. sinense distribution area reduced fast in Three Gorges region, a lot of distribution has diminished and vanished due to excessive digging, currently only in 3 towns of Wanzhou there exist 4 wild distribution areas...
November 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29286327/assessment-of-the-possibility-of-using-unmanned-aerial-vehicles-uavs-for-the-documentation-of-hiking-trails-in-alpine-areas
#7
Paweł Ćwiąkała, Rafał Kocierz, Edyta Puniach, Michał Nędzka, Karolina Mamczarz, Witold Niewiem, Paweł Wiącek
The research described in this paper deals with the documentation of hiking trails in alpine areas. The study presents a novel research topic, applying up-to-date survey techniques and top quality equipment with practical applications in nature conservation. The research presents the initial part of the process-capturing imagery, photogrammetric processing, quality checking, and a discussion on possibilities of the further data analysis. The research described in this article was conducted in the Tatra National Park (TNP) in Poland, which is considered as one of the most-visited national parks in Europe...
December 29, 2017: Sensors
https://www.readbyqxmd.com/read/29258947/a-novel-method-to-measure-the-tentorial-angle-and-the-implications-on-surgeries-of-the-pineal-region
#8
Hasan R Syed, Walter C Jean
OBJECTIVE: There is no standard way to define the angle of the tentorium. The current trend to use the Twining line to define this angle has significant pitfalls. The goal of the current study is to provide a new and accurate way to measure the "tentorial angle," and demonstrate its impact on surgeries of the pineal region. METHODS: A new technique (n-angle) to measure the tentorial angle is introduced using the floor of the fourth ventricle and the torcula. Comparisons to older techniques were made to illustrate reliability...
December 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29244213/trajectories-of-impairment-in-amyotrophic-lateral-sclerosis-insights-from-the-pooled-resource-open-access-als-clinical-trials-cohort
#9
Nimish J Thakore, Brittany R Lapin, Erik P Pioro
INTRODUCTION: Rate of decline of the Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised (ALSFRS-R) score is a common outcome measure and a powerful predictor of mortality in ALS. METHODS: Observed rate of decline (postslope) of ALSFRS-R, its linearity, and its relationship to decline at first visit (preslope) were examined in the Pooled Resource Open-Access ALS Clinical Trials cohort by using longitudinal mixed effects models. RESULTS: Mean ALSFRS-R postslope in 3,367 patients was -0...
December 15, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/29222816/shyness-and-trajectories-of-functional-network-connectivity-over-early-adolescence
#10
Chad M Sylvester, Diana J Whalen, Andy C Belden, Shana L Sanchez, Joan L Luby, Deanna M Barch
High shyness during early adolescence is associated with impaired peer relationships and risk for psychiatric disorders. Little is known, however, about the relation between shyness and trajectories of brain development over early adolescence. The current study longitudinally examined trajectories of resting-state functional connectivity (rs-fc) within four brain networks in 147 adolescents. Subjects underwent functional magnetic resonance imaging at three different time points, at average ages 10.5 (range = 7...
December 8, 2017: Child Development
https://www.readbyqxmd.com/read/29222452/enhanced-electronic-transport-modulation-in-single-crystalline-vo2-nanowire-based-solid-state-field-effect-transistors
#11
Tingting Wei, Teruo Kanki, Masashi Chikanari, Takafumi Uemura, Tsuyoshi Sekitani, Hidekazu Tanaka
Field-effect transistors using correlated electron materials with an electronic phase transition pave a new avenue to realize steep slope switching, to overcome device size limitations and to investigate fundamental science. Here, we present a new finding in gate-bias-induced electronic transport switching in a correlated electron material, i.e., a VO2 nanowire channel through a hybrid gate, which showed an enhancement in the resistive modulation efficiency accompanied by expansion of metallic nano-domains in an insulating matrix by applying gate biases near the metal-insulator transition temperature...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29179112/participatory-assessment-of-soil-erosion-severity-and-performance-of-mitigation-measures-using-stakeholder-workshops-in-koga-catchment-ethiopia
#12
Walle Jemberu, Jantiene E M Baartman, Luuk Fleskens, Coen J Ritsema
Farmers possess a wealth of knowledge regarding soil erosion and soil and water conservation (SWC), and there is a great demand to access it. However, there has been little effort to systematically document farmers' experiences and perceptions of SWC measures. Sustainable Land Management (SLM) has largely evolved through local traditional practices rather than adoption based on scientific evidence. This research aimed to assess soil erosion and performance of different SWC measures from the farmers' perspective by documenting their perceptions and experiences in Koga catchment, Ethiopia...
November 24, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29167601/tectonic-evolution-and-paleokarstification-of-carbonate-rocks-in-the-paleozoic-tarim-basin
#13
Xuhui Xu, Qianglu Chen, Chenglin Chu, Guorong Li, Cunge Liu, Zheng Shi
Thick carbonate rocks were developed in the depression of the Tarim craton during the Cambrian-Middle Ordovician periods. The compressional tectonic movement during the Middle Caledonian-Hercynian created the paleouplifts, which became the base for the paleokarst in the Ordovician carbonate rocks. Based on the large quantity of seismic, drilling, and geological outcrop data, this study analyzed the paleokarst development in relation to the multi-stage tectonic movements in the Paleozoic Era and different stages of karstification and hypothesized paleogeomorphology and paleokarst water system of those stages...
2017: Carbonates and Evaporites
https://www.readbyqxmd.com/read/29161602/gravel-beaches-nourishment-modelling-the-equilibrium-beach-profile
#14
I López, L Aragonés, Y Villacampa, F J Navarro-González
The erosion of the world's coasts and the shortage of sand to mitigate beach erosion are leading to the increasingly common use of gravel for coastal protection and beach nourishment. Therefore, in order to determine the amount of gravel required for such actions, it is important to know perfectly the equilibrium profile of gravel beaches. However, at present, this profile is obtained from formulas obtained mainly after channel tests, and therefore most of them do not adapt to the real profiles formed by gravel beaches in nature...
November 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29157032/pain-fatigue-function-and-participation-among-long-term-manual-wheelchair-users-partnered-with-a-mobility-service-dog
#15
Claude Vincent, Dany H Gagnon, Frédéric Dumont
PURPOSE: To assess the effects of a mobility service dog (MSD) on pain, fatigue, wheelchair-related functional tasks, participation and satisfaction among manual wheelchair users over a nine-month period. METHOD: A longitudinal study with repeated assessment times before and three, six and nine months after intervention was achieved. Intervention consisted in partnering each participant with a MSD. The setting is a well-established provincial service dog training school and participants homes...
November 20, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/29122823/comparative-evaluation-of-progression-rate-in-keratoconus-before-and-after-collagen-crosslinking
#16
Yu Meng Wang, Tommy Cy Chan, Marco C Y Yu, Vishal Jhanji
PURPOSE: To compare the rate of disease progression in keratoconus before and after corneal collagen crosslinking (CXL). METHODS: 145 eyes were followed without CXL (no-CXL group) for a median duration of 31 months whereas 45 eyes were followed up for 41 months before (pre-CXL) and after (post-CXL) accelerated, epithelium-off crosslinking. Progression was defined based on significant slope found in linear mixed effect models against time. Swept-source optical coherence tomography was used for measurement of anterior steep keratometry, anterior flat keratometry (Ant Kf), anterior average keratometry (Ant Avg K); posterior steep keratometry, posteriorflat keratometry (Post Kf), posterior average keratometry (Post Avg K) and corneal thickness...
November 9, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29104543/simultaneous-quantification-of-spatially-discordant-alternans-in-voltage-and-intracellular-calcium-in-langendorff-perfused-rabbit-hearts-and-inconsistencies-with-models-of-cardiac-action-potentials-and-ca-transients
#17
Ilija Uzelac, Yanyan C Ji, Daniel Hornung, Johannes Schröder-Scheteling, Stefan Luther, Richard A Gray, Elizabeth M Cherry, Flavio H Fenton
Rationale: Discordant alternans, a phenomenon in which the action potential duration (APDs) and/or intracellular calcium transient durations (CaDs) in different spatial regions of cardiac tissue are out of phase, present a dynamical instability for complex spatial dispersion that can be associated with long-QT syndrome (LQTS) and the initiation of reentrant arrhythmias. Because the use of numerical simulations to investigate arrhythmic effects, such as acquired LQTS by drugs is beginning to be studied by the FDA, it is crucial to validate mathematical models that may be used during this process...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29100454/peritoneal-recurrence-in-gastric-cancer-following-curative-resection-can-be-predicted-by-postoperative-but-not-preoperative-biomarkers-a-single-institution-study-of-320-cases
#18
Fan Wu, Chunmei Shi, Riping Wu, Zhiqing Huang, Qiang Chen
To determine the risk factors for peritoneal recurrence in gastric cancer patients after curative resection, we included 320 patients with stage I-III primary gastric cancer between January 2008 and June 2012. Data on each patient's surgical and pathological information, preoperative and postoperative tumor markers were collected and analyzed retrospectively. The risk factors for peritoneal recurrence were investigated by univariate and multivariate analysis. In patients with peritoneal recurrence, advanced T or N stage, low differentiation, vascular/lymphatic invasion, perineural invasion, and elevated postoperative CEA/CA19-9 were more common than in patients without peritoneal recurrence...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29071706/behavioral-flexibility-in-learning-to-sit
#19
Jaya Rachwani, Kasey C Soska, Karen E Adolph
What do infants learn when they learn to sit upright? We tested behavioral flexibility in learning to sit-the ability to adapt posture to changes in the environment-in 6- to 9-month-old infants sitting on forward and backward slopes. Infants began with slant at 0°; then slant increased in 2° increments until infants lost balance. Infants kept balance on impressively steep slopes, especially in the forward direction, despite the unexpected movements of the apparatus. Between slant adjustments while the slope was stationary, infants adapted posture to the direction and degree of slant by leaning backward on forward slopes and forward on backward slopes...
December 2017: Developmental Psychobiology
https://www.readbyqxmd.com/read/29068798/use-of-pain-medication-before-and-after-inpatient-musculoskeletal-rehabilitation-longitudinal-analysis-of-a-nationwide-cohort
#20
Mikhail Saltychev, Katri Laimi, Jaana Pentti, Mika Kivimäki, Jussi Vahtera
The objective of this study was to identify subgroups among the participants in inpatient multidisciplinary musculoskeletal rehabilitation based on the differences in the shapes of trajectories of pain medication consumption during the 9 years around the time of intervention. A register-based study among 4578 public sector employees was conducted. Group-based trajectory analysis was done on the purchase of prescribed pain medications during the 9 years around the time of rehabilitation. The participants were on an average 50...
October 24, 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
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