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https://www.readbyqxmd.com/read/29454201/nitrous-oxide-emissions-from-near-zero-water-exchange-brackish-recirculating-aquaculture-systems
#1
Uri Yogev, Adiel Atari, Amit Gross
The development of intensive recirculating aquaculture systems (RAS) with low water exchange has accelerated in recent years as a result of environmental, economic and other concerns. In these systems, fish are commonly grown at high density, 50 to 150kg/m 3 , using high-protein (30%-60%) feeds. Typically, the RAS consists of a solid treatment and a nitrification unit; in more advanced RAS, there is an additional denitrification step. Nitrous oxide (N 2 O), a byproduct during nitrification and denitrification processes, is a potent greenhouse gas that destroys the ozone layer...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29453965/effects-of-beauveria-bassiana-on-predation-and-behavior-of-the-predatory-mite-phytoseiulus-persimilis
#2
Shengyong Wu, Zhenlong Xing, Weinan Sun, Xuenong Xu, Ruixia Meng, Zhongren Lei
Determination of intraguild interactions between entomopathogens and predators is important when attempting to use a combination of these two natural enemy groups for biological control of their shared arthropod pest species. This study assessed the effects of Beauveria bassiana on the predation and associated behavior of the predatory mite, Phytoseiulus persimilis, against Tetranychus urticae. The functional response tests showed that P. persimilis exhibited a Holling type II response on the spider mite, Tetranychus urticae, when treated with either a B...
February 14, 2018: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29453666/comments-on-a-mathematical-study-to-control-visceral-leishmaniasis-an-application-to-south-sudan
#3
E Iboi, K Okuneye, O Sharomi, A B Gumel
Deterministic (ordinary differential equation) models for the transmission dynamics of vector-borne diseases that incorporate disease-induced death in the host(s) population(s) are generally known to exhibit the phenomenon of backward bifurcation (where a stable disease-free equilibrium of the model coexists with a stable endemic equilibrium when the associated reproduction number of the model is less than unity). Further, it is well known that, in these models, the phenomenon of backward bifurcation does not occur when the disease-induced death rate is negligible (e...
February 16, 2018: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/29453402/a-soft-lithographic-approach-to-fabricate-inas-nanowire-field-effect-transistors
#4
Sang Hwa Lee, Sung-Ho Shin, Morten Madsen, Kuniharu Takei, Junghyo Nah, Min Hyung Lee
The epitaxial layer transfer process was previously introduced to integrate high-quality and ultrathin III-V compound semiconductor layers on any substrate. However, this technique has limitation for fabrication of sub-micron nanoribbons due to the diffraction limit of photolithography. In order to overcome this limitation and scale down its width to sub-50 nm, we need either a costly short wavelength lithography system or a non-optical patterning method. In this work, high-quality III-V compound semiconductor nanowires were fabricated and integrated onto a Si/SiO 2 substrate by a soft-lithography top-down approach and an epitaxial layer transfer process, using MBE-grown ultrathin InAs as a source wafer...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453271/government-will-cap-legal-costs-of-clinical-negligence-claims
#5
Abi Rimmer
No abstract text is available yet for this article.
February 16, 2018: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/29453039/tolerance-for-psychological-pain-and-capability-for-suicide-contributions-to-suicidal-ideation-and-behavior
#6
Esther L Meerwijk, Sandra J Weiss
Among people with suicide ideation most do not attempt suicide or die by suicide. In this online study of adult US Facebook users (n = 219), we examined capability for suicide, operationalized as fearlessness about death, and tolerance for psychological pain as potential variables that may explain why some people move from suicide ideation to suicidal behavior. Tolerance for psychological pain was significantly higher for participants who had never attempted suicide. Fearlessness about death was higher in participants who had attempted suicide, but not significantly...
February 3, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29452867/deep-inspiration-breath-hold-level-variability-and-deformation-in-locoregional-breast-irradiation
#7
Leigh Conroy, Sarah Quirk, Elizabeth Watt, Gillian Ecclestone, Jessica L Conway, Ivo A Olivotto, Tien Phan, Wendy L Smith
PURPOSE: The purpose of this study was to evaluate the dosimetric effect of breath hold level variability and deformation on breast, chest wall, internal mammary chain (IMC) nodes, and heart. METHODS AND MATERIALS: Left-sided post-lumpectomy (n = 12) and postmastectomy (n = 3) patients underwent deep inspiration breath hold (DIBH) and exhale breath hold (EBH) computed tomography (CT) scans. Forward-planned locoregional breast plans were created on the DIBH scan...
February 13, 2018: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29452515/intelligent-anticancer-drug-delivery-performances-of-two-poly-n-isopropylacrylamide-based-magnetite-nanohydrogels
#8
Nahid Poorgholy, Bakhshali Massoumi, Marjan Ghorbani, Mehdi Jaymand, Hamed Hamishehkar
This article evaluates the anticancer drug delivery performances of two nanohydrogels composed of poly(N-isopropylacrylamide-co-itaconic anhydride) [P(NIPAAm-co-IA)], poly(ethylene glycol) (PEG), and Fe 3 O 4 nanoparticles. For this purpose, the magnetite nanohydrogels (MNHGs) were loaded with doxorubicin hydrochloride (DOX) as a universal anticancer drug. The morphologies and magnetic properties of the DOX-loaded MNHGs were investigated using transmission electron microscopy (TEM) and vibrating-sample magnetometer (VSM), respectively...
February 16, 2018: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29452133/some-properties-of-the-conditioned-reconstructed-process-with-bernoulli-sampling
#9
Carsten Wiuf
In many areas of genetics it is of relevance to consider a population of individuals that is founded by a single individual in the past. One model for such a scenario is the conditioned reconstructed process with Bernoulli sampling that describes the evolution of a population of individuals that originates from a single individual. Several aspects of this reconstructed process are studied, in particular the Markov structure of the process. It is shown that at any given time in the past, the conditioned reconstructed process behaves as the original conditioned reconstructed process after a suitable time-dependent change of the sampling probability...
February 13, 2018: Theoretical Population Biology
https://www.readbyqxmd.com/read/29451892/assessing-site-formation-and-assemblage-integrity-through-stone-tool-refitting-at-gruta-da-oliveira-almonda-karst-system-torres-novas-portugal-a-middle-paleolithic-case-study
#10
Marianne Deschamps, João Zilhão
We use stone tool refitting to assess palimpsest formation and stratigraphic integrity in the basal units of the Gruta da Oliveira archeo-stratigraphic sequence, layers 15-27, which TL and U-series dating places in late Marine Isotope Stage (MIS) 5 or early MIS 4. As in most karst contexts, the formation of this succession involved multiple and complex phenomena, including subsidence, bioturbation, carnivore activity and runoff as agents of potential post-depositional disturbance. During phases of stabilization, such as represented by layers 15, 21 and 22, the excavated area was inhabited and refits corroborate that post-depositional displacement is negligible...
2018: PloS One
https://www.readbyqxmd.com/read/29451775/fluorescence-imaging-of-huntingtin-mrna-knockdown
#11
Eunseon Oh, Yuhong Liu, Mahesh V Sonar, Diane Merry, Eric Wickstrom
Huntington's disease (HD) is an autosomal-dominant neurodegenerative genetic disorder caused by CAG repeat expansion in exon 1 of the HTT gene. Expression of the mutant gene results in the production of a neurotoxic polyglutamine (polyQ)-expanded huntingtin (Htt) protein. Clinical trials of knockdown therapy of mutant polyglutamine-encoding HTT mRNA in Huntington's disease (HD) have begun. To measure HTT mRNA knockdown effectiveness in human cells, we utilized a fluorescent hybridization imaging agent specific to the region encompassing the human HTT mRNA initiation codon...
February 16, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29451435/safe-insertion-of-s-2-alar-iliac-screws-radiological-comparison-between-2-insertion-points-using-computed-tomography-and-3d-analysis-software
#12
Kentaro Yamada, Yuichiro Abe, Shigenobu Satoh
OBJECTIVE S-2 alar iliac (S2AI) screws are commonly used as anchors for lumbosacral fixation. A serious potential complication of screw insertion is major vascular injury due to anterior or caudal screw deviation. To avoid screw deviation, the pelvic inlet view on intraoperative fluoroscopy images is recommended. However, there has been no detailed investigation of optimal fluoroscopic incline with the pelvic inlet view. The purpose of this study was to investigate the safety margins and to optimize fluoroscopic settings to avoid screw deviation with 2 reported insertion techniques using 3D analysis software and CT...
February 16, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29451084/unusual-case-of-choking-due-to-assassin-bug-cydnocoris-gilvus
#13
Vaibhav Sonar, Sachin Patil
Choking is a form of asphyxia which is caused by an obstruction within the air passages. Here, we report a case of obstruction of the upper respiratory tract due to assassin bug ( Cydnocoris gilvus) where allegations of medical negligence were made by relatives of the deceased. Autopsy findings demonstrated that an insect was present inside the larynx, lodged at the epiglottis. Multiple haemorrhagic patches were present at the base of the tongue, larynx, epiglottis, vocal cords and tracheal bifurcation. As Reduviidae can be successfully used as a biological pest-control agents, they should be used with due precaution...
January 2018: Medicine, Science, and the Law
https://www.readbyqxmd.com/read/29449731/mixed-malignant-mullerian-tumor-with-neuroendocrine-features-in-an-irradiated-uterus-for-cervical-carcinoma-a-unique-association-a-morphological-immunohistochemisty-and-ultrastructural-study
#14
V G Vellone, B Spina, F Grillo, P Calamaro, F Sarocchi, P Sala, S Ferrero, E Fulcheri
Chemo-radiation represents an effective therapy for carcinoma of the uterine cervix. The endometrium may however receive a consistent dose of mutagenic radiations and patients may have an increased risk of secondary malignancies. Endometrial mixed malignant mullerian tumor (MMMT) is a rare, highly aggressive disease, and neuroendocrine features are even rarer. A 68 years old woman underwent radio-chemotherapy for a squamous cell carcinoma of the cervix. Follow up was uneventful until, eight years after radio-chemotherapy, imaging exams detected a diffuse enlargement of the uterine body...
December 2017: Pathologica
https://www.readbyqxmd.com/read/29448798/effect-of-alkaline-metal-cations-on-the-ionic-structure-of-cryolite-melts-ab-initio-npt-md-study
#15
Tomáš Bučko, František Šimko
Ab initio molecular dynamics simulations in an NpT ensemble have been performed to study the role of alkaline metal cations (Me = Li, Na, K, Rb) on the structure and vibrational properties of melts of Me-cryolites (Me 3 AlF 6 ) at T = 1300 K. In all melts examined in this work, the species AlF 5 2- has been found to be formed at the highest abundance [from 58% (Li) to 70% (Na)] among the Al-containing anionic clusters. The concentration of clusters AlF 4 - increases with the size of cations while that of anions AlF 6 3- follows the opposite trend and it becomes negligible in the melts of the K- and Rb-cryolites...
February 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29448640/impact-of-isolation-and-immobilization-layers-on-the-electro-mechanical-response-of-piezoresistive-nano-cantilever-sensors
#16
Ribu Mathew, A Ravi Sankar
In the last decade, piezoresistive nano cantilever sensors have been extensively explored, especially for chemical and biological sensing applications. Piezoresistive cantilever sensors are multi-layer structures with different constituent materials. Performance of such sensors is a function of their geometry and constituent materials. For a fixed material set, the pre-requisite for optimizing the performance of a composite piezoresistive cantilever sensor is careful geometrical design of its constituent layers...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448233/earth-s-field-nmr-detection-of-oil-under-arctic-ice-water-suppression
#17
Mark S Conradi, Stephen A Altobelli, Nicholas J Sowko, Susan H Conradi, Eiichi Fukushima
Earth's field NMR has been developed to detect oil trapped under or in Arctic sea-ice. A large challenge, addressed here, is the suppression of the water signal that dominates the oil signal. Selective suppression of water is based on relaxation time T 1 because of the negligible chemical shifts in the weak earth's magnetic field, making all proton signals overlap spectroscopically. The first approach is inversion-null recovery, modified for use with pre-polarization. The requirements for efficient inversion over a wide range of B 1 and subsequent adiabatic reorientation of the magnetization to align with the static field are stressed...
February 7, 2018: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29447625/predicting-help-seeking-behavior-the-impact-of-knowing-someone-close-who-has-sought-help
#18
David J Disabato, Jerome L Short, Diane M Lameira, Karen D Bagley, Stephanie J Wong
OBJECTIVES: This study sought to replicate and extend research on social facilitators of college student's help seeking for psychological problems. PARTICIPANTS: We collected data on 420 ethnically diverse college students at a large public university (September 2008 - May 2010). METHODS: Students completed a cross-sectional online survey. RESULTS: We found that students who were aware of close others' (e.g., family, friends) help seeking were two times more likely to have sought formal (e...
February 15, 2018: Journal of American College Health: J of ACH
https://www.readbyqxmd.com/read/29446763/ferroelectric-nanoparticle-embedded-sponge-structure-triboelectric-generators
#19
Daehoon Park, Sung-Ho Shin, Ick-Jae Yoon, Junghyo Nah
We report packaged triboelectric nanogenerators (TENGs) fabricated with ferroelectric nanoparticles (NPs) embedded sponge created by using sugar powder as a sacrificial template. Here, the sponge structure provides a minimal separation gap necessary for triboelectric induction and resilience during detachment between two contacted surfaces. Besides, excellent mechanical durability is obtained due to decent elasticity and flexibility of the sponge structure. Ferroelectric BaTiO3 NPs embedded in a sponge structure contributes to increased output voltage and current by increasing surface charge density by spontaneous dipole and permittivity modulation...
February 15, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29446760/quenching-free-fluorescence-signal-from-plastic-fibres-in-proton-dosimetry-understanding-the-influence-of-%C3%A4-erenkov-radiation
#20
Jeppe Brage Christensen, Erik Almhagen, Håkan Nyström, Claus E Andersen
Photons emitted in optical fibres under proton irradiations have been attributed to be both entirely Čerenkov radiation or to be light consisting of fluorescence with a substantial amount of Čerenkov radiation. The source of the light emission is assessed in order to understand why the signal from optical fibres irradiated with protons reportedly is quenching-free. 
 
 The present study uses the directional emittance of Čerenkov photons in 12 MeV and 20 MeV electron beams to validate a Monte Carlo model for simulating the emittance and transmission of Čerenkov radiation in optical fibres...
February 15, 2018: Physics in Medicine and Biology
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