keyword
MENU ▼
Read by QxMD icon Read
search

Vickers

keyword
https://www.readbyqxmd.com/read/28438485/variations-in-the-apoe-allele-or-bdnf-val66met-polymorphism-are-not-associated-with-changes-in-cognitive-function-following-a-tertiary-education-intervention-in-older-adults-the-tasmanian-healthy-brain-project
#1
Megan E Thow, Mathew J Summers, Jeffery J Summers, Nichole L Saunders, James C Vickers
The apolipoprotein (APOE) ε4 allele and the Met variant of the brain-derived neurotrophic factor (BDNF) Val66Met polymorphism are associated with reduced cognitive function in older adults. The aim of this study was to examine the independent and interactional effect of the APOE ε4 allele and BDNF Val66Met polymorphism on cognitive function in a cohort of healthy older adults who had undertaken further university level education. Multiple group latent growth curve modeling revealed no change in cognitive function over time in APOE ε4-carriers or in BDNF Met-carriers, nor in carriers of both APOE-ε4 and BDNF-Met alleles...
April 2, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28436062/ultrahigh-average-thermoelectric-figure-of-merit-low-lattice-thermal-conductivity-and-enhanced-micro-hardness-in-nanostructured-gete-x-agsbse2-100-x
#2
Manisha Samanta, Subhajit Roychowdhury, Jay Ghatak, Suresh Perumal, Kanishka Biswas
Waste heat sources are generally diffused and provide a range of temperatures rather than a particular temperature. Thus, thermoelectric waste heat to electricity conversion requires high average thermoelectric figure of merit (ZTavg) of materials over the entire working temperature along with high peak thermoelectric figure of merit (ZTmax). Herein, we report an ultrahigh ZTavg of 1.4 for (GeTe)80(AgSbSe2)20 [TAGSSe-80] in the temperature range of 300-700K, which is one of the highest value measured among the state-of-art Pb-free thermoelectric materials...
April 24, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28435619/acid-etching-of-glass-infiltrated-zirconia-and-its-biological-response
#3
Van Thi Vu, Gye-Jeong Oh, Kwi-Dug Yun, Hyun-Pil Lim, Ji-Won Kim, Thao Phuong Thi Nguyen, Sang-Won Park
PURPOSE: The purpose of this study was to evaluate the influence of acid etching treatment on surface characteristics and biological response of glass-infiltrated zirconia. MATERIALS AND METHODS: A hundred zirconia specimens were divided into four groups depending on surface treatments: untreated zirconia (group Z); acid-etched zirconia (group ZE); glass-infiltrated zirconia (group ZG); and glass-infiltrated and acid-etched zirconia (group ZGE). Surface roughness, surface topography, surface morphology, and Vickers hardness of specimens were evaluated...
April 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28429875/effect-of-untreated-zirconium-oxide-nanofiller-on-the-flexural-strength-and-surface-hardness-of-autopolymerized-interim-fixed-restoration-resins
#4
Abdolhamid Alhavaz, Maryam Rezaei Dastjerdi, Arman Ghasemi, Azade Ghasemi, Abolfazl Alizadeh Sahraei
OBJECTIVE: Autopolymerized poly methyl methacrylate (PMMA) resin is commonly used for the construction of interim restorations; however, it has less than optimal mechanical properties. In this article, we evaluated the reinforcing effect of adding untreated zirconia nanoparticles on the flexural strength and surface hardness of this resin. METHODS: A total of 80 specimens were fabricated. Forty each were used for the flexural strength test and for the surface hardness test...
April 21, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28428800/effect-of-enamel-caries-lesion-baseline-severity-on-fluoride-dose-response
#5
Frank Lippert
This study aimed to investigate the effect of enamel caries lesion baseline severity on fluoride dose-response under pH cycling conditions. Early caries lesions were created in human enamel specimens at four different severities (8, 16, 24, and 36 h). Lesions were allocated to treatment groups (0, 83, and 367 ppm fluoride as sodium fluoride) based on Vickers surface microhardness (VHN) and pH cycled for 5 d. The cycling model comprised 3 × 1 min fluoride treatments sandwiched between 2 × 60 min demineralization challenges with specimens stored in artificial saliva in between...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28413590/effect-of-nano-hydroxyapatite-toothpaste-on-microhardness-ofartificial-carious-lesions-created-on-extracted-teeth
#6
Asghar Ebadifar, Mohammad Nomani, Sayed Ali Fatemi
Background. Many types of toothpastes contain substances that can remineralize initial enamel caries. This study aimed to assess the effect of nano-hydroxyapatite (NHA) on microhardness of artificially created carious lesions. Methods. In this in vitro study, NHA was prepared using sol-gel technique and added to the toothpaste with 7% concentration. A total of 80 extracted sound teeth were collected. The crowns were polished using 500-grit abrasive paper. The specimens were randomly coded from 1 to 80. Number 1 to 40 were assigned to group A and numbers 41 to 80 to group B...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28400603/maternal-plasma-mirnas-as-biomarkers-during-mid-pregnancy-to-predict-later-spontaneous-preterm-birth-a-pilot-study
#7
Clint Gray, Lesley M McCowan, Rachna Patel, Rennae S Taylor, Mark H Vickers
More than 10% of babies are born too early resulting in over 15 million preterm births and more than one million new-born deaths globally. Although women with a previous spontaneous preterm birth (SPTB) are considered at high risk for recurrence, the majority occur in women without prior history. Prediction of SPTB risk allows for improved care and potential for targeting novel and existing therapeutics to prevent SPTB, which may result in improved outcomes for infant and mother. In this pilot study, a miRNA array was used to analyse plasma from healthy women in their first pregnancy at 20 weeks of gestation who then went on to deliver either at term or experience SPTB at 28-32 weeks...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28389484/long-term-use-benefits-of-personal-frequency-modulated-systems-for-speech-in-noise-perception-in-patients-with-stroke-with-auditory-processing-deficits-a-non-randomised-controlled-trial-study
#8
Nehzat Koohi, Deborah Vickers, Jason Warren, David Werring, Doris-Eva Bamiou
OBJECTIVES: Approximately one in five stroke survivors suffer from difficulties with speech reception in noise, despite normal audiometry. These deficits are treatable with personal frequency-modulated systems (FMs). This study aimed to evaluate long-term benefits in speech reception in noise, after daily 10-week use of personal FMs, in non-aphasic patients with stroke with auditory processing deficits. DESIGN: This was a prospective non-randomised controlled trial study...
April 7, 2017: BMJ Open
https://www.readbyqxmd.com/read/28389183/influence-of-the-cross-linking-agent-on-mechanical-properties-of-pmma-powder-with-compromised-particle-morphology
#9
Tassanaporn Saen-Isara, Surachai Dechkunakorn, Niwat Anuwongnukroh, Toemsak Srikhirin, Siriporn Tanodekaew, Wassana Wichai
OBJECTIVE: To investigate the effect of a cross-linking agent on the mechanical properties of self-cured orthodontic acrylic resin using PMMA powder (CPM-PMMA) with a compromised microstructure. MATERIALS AND METHODS: The mechanical properties of three sample groups were investigated in this study: CPM-PMMA, orthocryl and orthoplast. CPM-PMMA powder was prepared by suspension polymerization. It was mixed with a commercially available liquid (orthocryl) to yield a test specimen and to compare its flexural properties and Vicker hardness with the two commercial products...
April 4, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28385550/currents-of-memory-recent-progress-translational-challenges-and-ethical-considerations-in-fornix-deep-brain-stimulation-trials-for-alzheimer-s-disease
#10
REVIEW
John Noel M Viaña, James C Vickers, Mark J Cook, Frederic Gilbert
The serendipitous discovery of triggered autobiographical memories and eventual memory improvement in an obese patient who received fornix deep brain stimulation in 2008 paved the way for several phase I and phase II clinical trials focused on the safety and efficacy of this potential intervention for people with Alzheimer's disease. In this article, we summarize clinical trials and case reports on fornix deep brain stimulation for Alzheimer's disease and review experiments on animal models evaluating the physiological or behavioral effects of this intervention...
March 11, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28381300/linkages-between-changes-in-the-3d-organization-of-the-genome-and-transcription-during-myotube-differentiation-in-vitro
#11
Malina D Doynova, James F Markworth, David Cameron-Smith, Mark H Vickers, Justin M O'Sullivan
BACKGROUND: The spatial organization of eukaryotic genomes facilitates and reflects the underlying nuclear processes that are occurring in the cell. As such, the spatial organization of a genome represents a window on the genome biology that enables analysis of the nuclear regulatory processes that contribute to mammalian development. METHODS: In this study, Hi-C and RNA-seq were used to capture the genome organization and transcriptome in mouse muscle progenitor cells (C2C12 myoblasts) before and after differentiation to myotubes, in the presence or absence of the cytidine analogue AraC...
April 5, 2017: Skeletal Muscle
https://www.readbyqxmd.com/read/28372478/investigation-of-impulsivity-in-binge-eating-rats-in-a-delay-discounting-task-and-its-prevention-by-the-d-amphetamine-prodrug-lisdexamfetamine
#12
Steven P Vickers, Simon Goddard, Richard J Brammer, Peter H Hutson, David J Heal
Freely-fed, female, rats were trained in a two-lever, delay-discounting task: one lever delivered a single chocolate-flavoured pellet immediately and the other a three-pellet reward after increasing delay (0, 4, 8, 16, 32 s). Rats were divided into two groups (i.e. binge-eating rats given irregular, limited access to chocolate in addition to normal chow and controls maintained on normal chow). Both groups exhibited increased preference for the immediate reward as the delay interval was lengthened. The discounting rate was significantly greater in binge-eating rats than non-binge-eating controls, especially as the behaviour became more established indicating that increased impulsivity and intolerance of delayed reward are part of the psychopathology of binge-eating...
February 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28343461/the-impact-of-maternal-obesity-on-inflammatory-processes-and-consequences-for-later-offspring-health-outcomes
#13
S A Segovia, M H Vickers, C M Reynolds
Obesity is a global epidemic, affecting both developed and developing countries. The related metabolic consequences that arise from being overweight or obese are a paramount global health concern, and represent a significant burden on healthcare systems. Furthermore, being overweight or obese during pregnancy increases the risk of offspring developing obesity and other related metabolic complications in later life, which can therefore perpetuate a transgenerational cycle of obesity. Obesity is associated with a chronic state of low-grade metabolic inflammation...
March 27, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28342935/interpreting-patient-reported-urinary-and-sexual-function-outcomes-across-multiple-validated-instruments
#14
Emily A Vertosick, Andrew J Vickers, Janet E Cowan, Jeanette M Broering, Peter R Carroll, Matthew R Cooperberg
INTRODUCTION: Comparing patient-reported outcomes such as urinary and erectile function across institutions is critical for prostate cancer research and quality assurance. Such comparisons are complicated by the use of different questionnaires. We aimed to develop a method to convert scores between four commonly used instruments. MATERIALS AND METHODS: Patient-reported data on urinary and sexual function were collected from 1,284 men with localized prostate cancer using the Expanded Prostate Index Composite (EPIC-26), UCLA Prostate Cancer Index (PCI), Sexual Health Inventory for Men (SHIM) and International Prostate Symptom Scale (IPSS) questionnaires...
March 22, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28338021/absence-of-a-gestational-diabetes-phenotype-in-the-leprdb-mouse-is-independent-of-control-strain-diet-misty-allele-or-parity
#15
Jasmine F Plows, XinYang Yu, Ric Broadhurst, Mark H Vickers, Chao Tong, Hua Zhang, HongBo Qi, Joanna L Stanley, Philip N Baker
Treatment options for gestational diabetes (GDM) are limited. In order to better understand mechanisms and improve treatments, appropriate animal models of GDM are crucial. Heterozygous db mice (db/+) present with glucose intolerance, insulin resistance, and increased weight gain during, but not prior to, pregnancy. This makes them an ideal model for GDM. However, several recent studies have reported an absence of GDM phenotype in their colony. We investigated several hypotheses for why the phenotype may be absent, with the aim of re-establishing it and preventing further resources being wasted on an ineffective model...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28333399/evaluation-of-surface-roughness-characteristics-using-atomic-force-microscopy-and-inspection-of-microhardness-following-resin-infiltration-with-icon-%C3%A2
#16
Elif Beril Gurdogan, Didem Ozdemir-Ozenen, Nuket Sandalli
OBJECTIVE: The aim of this study was to evaluate the surface roughness via atomic force microscopy (AFM) as well as to evaluate the microhardness values of Icon(®) in comparison with sound and demineralized enamel in a large subject group. MATERIALS AND METHODS: Enamel samples were prepared from sound bovine incisors and randomly allocated into either AFM (n = 60) or microhardness (n = 60) groups. The AFM group was divided into control (n = 30) and Icon(®) (n = 30) subgroups...
March 23, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28333319/wck-4234-a-novel-diazabicyclooctane-potentiating-carbapenems-against-enterobacteriaceae-pseudomonas-and-acinetobacter-with-class-a-c-and-d-%C3%AE-lactamases
#17
Shazad Mushtaq, Anna Vickers, Neil Woodford, David M Livermore
Background: Several diazabicyclooctanes (DBOs) are under development as inhibitors of class A and C β-lactamases. Inhibition of OXA (class D) carbapenemases is variable, with those of Acinetobacter spp. remaining notably resistant. We describe a novel DBO, WCK 4234 (Wockhardt), with distinctive activity against OXA carbapenemases. Methods: MICs of imipenem and meropenem were determined by CLSI agar dilution with WCK 4234 added at 4 or 8 mg/L. Test organisms were clinical Enterobacteriaceae, Acinetobacter baumannii and Pseudomonas aeruginosa with carbapenemases or carbapenem resistance via porin loss plus AmpC or ESBL activity...
February 16, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28328215/synthesis-and-mechanical-character-of-hexagonal-phase-%C3%AE-wn
#18
Changchun Wang, Qiang Tao, Shushan Dong, Xin Wang, Pinwen Zhu
In this work, high-quality bulk WC-structured WN (δ-WN) was synthesized via an untraditional method and the structure was accurately determined by X-ray diffraction and Rietveld refinement. In the process of synthesizing δ-WN, W2N3 and melamine were used as tungsten source and nitrogen source, respectively. The result of successfully synthesized high-quality δ-WN indicates that our method is an effective route for synthesizing high-quality bulk δ-WN and melamine is a pure nitrogen source for introducing the nitrogen to the metal precursor...
March 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28320490/effect-of-cu-on-nanoscale-precipitation-evolution-and-mechanical-properties-of-a-fe-nial-alloy
#19
Qin Shen, Hao Chen, Wenqing Liu
The microstructural evolution of precipitation in two model alloys, Fe-NiAl and Fe-NiAl-Cu, was investigated during aging at 500°C for different times using atom probe tomography (APT). The APT results reveal that the addition of Cu effectively increases the number density of NiAl precipitates. This is attributed to Cu promoting the nucleation of NiAl particles by increasing the chemical driving force and decreasing the interfacial energy. The NiAl precipitates of the Fe-NiAl-Cu alloy grow and coarsen at a slower rate than that of the Fe-NiAl alloy, mainly due to the slower diffusion rate of the Cu atoms...
March 21, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28314357/experimental-study-on-thermal-conductivity-and-hardness-of-cu-and-ni-nanoparticle-packed-bed-for-thermoelectric-application
#20
Zi-Zhen Lin, Cong-Liang Huang, Wen-Kai Zhen, Yan-Hui Feng, Xin-Xin Zhang, Ge Wang
The hot-wire method is applied in this paper to probe the thermal conductivity (TC) of Cu and Ni nanoparticle packed beds (NPBs). A different decrease tendency of TC versus porosity than that currently known is discovered. The relationship between the porosity and nanostructure is investigated to explain this unusual phenomenon. It is found that the porosity dominates the TC of the NPB in large porosities, while the TC depends on the contact area between nanoparticles in small porosities. Meanwhile, the Vickers hardness (HV) of NPBs is also measured...
December 2017: Nanoscale Research Letters
keyword
keyword
116453
1
2
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"