keyword
MENU ▼
Read by QxMD icon Read
search

RPM

keyword
https://www.readbyqxmd.com/read/27917513/torsional-and-bending-resistance-of-waveone-gold-reciproc-and-twisted-file-adaptive-instruments
#1
S E Elsaka, A M Elnaghy, A E Badr
AIM: To compare the torsional and bending resistance of WaveOne Gold (Dentsply Tulsa Dental Specialties, Tulsa, OK, USA), Reciproc (VDW, Munich, Germany) and Twisted File Adaptive (Axis/SybronEndo, Orange, CA, USA) instruments. METHODOLOGY: Torsional strength of WaveOne Gold primary size 25, .07 taper, Reciproc size 25, .08 taper and Twisted File Adaptive M-L1 size 25, .08 taper was measured by fastening the apical 3 mm of the instrument firmly and applying a constant rotation at 2 rpm to the instrument using a torsiometer...
December 5, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27915573/solid-dispersions-enhance-solubility-dissolution-and-permeability-of-thalidomide
#2
Silvana A Barea, Cristiane B Mattos, Ariadne C C Cruz, Vitor C Chaves, Rafael N Pereira, Claudia M O Simões, Jadel M Kratz, Letícia S Koester
Thalidomide (THD) is a BCS class II drug with renewed and growing therapeutic applicability. Along with the low aqueous solubility, additional poor biopharmaceutical properties of the drug, i.e. chemical instability, high crystallinity and polymorphism, lead to a slow and variable oral absorption. In this view, we developed solid dispersions (SDs) containing THD dispersed in different self-emulsifying carriers aiming at an enhanced absorption profile for the drug. THD was dispersed in lauroyl macrogol-32 glycerides (Gelucire® 44/14) and α-tocopherol polyethylene glycol succinate (Kolliphor® TPGS),in the presence or absence of the precipitation inhibitor polyvinylpyrrolidone K30 (PVP K30), by means of the solvent method...
December 5, 2016: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/27914022/alkaline-protease-production-from-brevibacterium-luteolum-mtcc-5982-under-solid-state-fermentation-and-its-application-for-sulfide-free-unhairing-of-cowhides
#3
R Renganath Rao, M Vimudha, N R Kamini, M K Gowthaman, B Chandrasekran, P Saravanan
Enzyme-based unhairing in replacement of conventional lime sulfide system has been attempted as an alternative for tackling pollution. The exorbitant cost of enzyme and the need for stringent process control need to be addressed yet. This study developed a mechanism for regulated release of protease from cheaper agro-wastes, which overcomes the necessity for stringent process control along with total cost reduction. The maximum protease activity of 1193.77 U/g was obtained after 96 h of incubation with 15% inoculum of the actinomycete strain Brevibacterium luteolum (MTCC 5982) under solid-state fermentation (SSF)...
December 2, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27910381/single-phase-driven-ultrasonic-motor-using-two-orthogonal-bending-modes-of-sandwiching-piezo-ceramic-plates
#4
Yuting Ma, Minkyu Choi, Kenji Uchino
A compact ultrasonic motor using sandwiching piezo-ceramic plates was developed, having advantages of low manufacturing costs, simple driving circuit, and high scalability. The stator is composed of two piezoelectric plates attached to a T-shaped steel body. Two orthogonal bending modes can be excited by driving one piezoelectric plate and the reversed motion of the rotor can be obtained by driving the piezoelectric plate on the opposite side. The prototype stator with a size of 15 mm × 2.44 mm × 2 mm, operated at 44...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27904937/separation-of-cyclic-lipopeptide-puwainaphycins-from-cyanobacteria-by-countercurrent-chromatography-combined-with-polymeric-resins-and-hplc
#5
José Cheel, Petra Urajová, Jan Hájek, Pavel Hrouzek, Marek Kuzma, Elodie Bouju, Karine Faure, Jiří Kopecký
Puwainaphycins are a recently described group of β-amino fatty acid cyclic lipopeptides of cyanobacterial origin that possess interesting biological activities. Therefore, the development of an efficient method for their isolation from natural sources is necessary. Following the consecutive adsorption of the crude extract on Amberlite XAD-16 and XAD-7 resins, countercurrent chromatography (CCC) was applied to separate seven puwainaphycin variants from a soil cyanobacterium (Cylindrospermum alatosporum CCALA 988)...
November 30, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27904079/application-of-response-surface-methodology-to-estimate-the-design-space-of-pharmaceutical-diluents-for-dispensing-powdered-formulations
#6
Yasunori Miyazaki, Kozo Takayama, Tomonobu Uchino, Yoshiyuki Kagawa
Scientific approaches for dispensation are important for the quality and efficacy of drug treatments. Therefore, for the dispensation of powdered medicines, we have developed a powder blending method using a planetary centrifugal mixer (PCM) to replace the empirical manual method involving a mortar and pestle. The aim of this study was to optimize the formulation of pharmaceutical diluents for dispensing powdered medicines, using PCM. The diluents, composed of powdered lactose, crystalline lactose, and corn starch were assigned to a {3,2}-Simplex Lattice design...
2016: Chemical & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27898855/genomewide-association-study-of-methane-emissions-in-angus-beef-cattle-with-validation-in-dairy-cattle
#7
C I V Manzanilla-Pech, Y De Haas, B J Hayes, R F Veerkamp, M Khansefid, K A Donoghue, P F Arthur, J E Pryce
Methane (CH) is a product of enteric fermentation in ruminants, and it represents around 17% of global CH emissions. There has been substantial effort from the livestock scientific community toward tools that can help reduce this percentage. One approach is to select for lower emitting animals. To achieve this, accurate genetic parameters and identification of the genomic basis of CH traits are required. Therefore, the objectives of this study were 1) to perform a genomewide association study to identify SNP associated with several CH traits in Angus beef cattle (1,020 animals) and validate them in a lactating Holstein population (population 1 [POP1]; 205 animals); 2) to validate significant SNP for DMI and weight at test (WT) from a second Holstein population, from a previous study (population 2 [POP2]; 903 animals), in an Angus population; and 3) to evaluate 2 different residual CH traits and determine if the genes associated with CH also control residual CH traits...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27897135/improved-dielectric-constant-and-breakdown-strength-of-%C3%AE-phase-dominant-super-toughened-polyvinylidene-fluoride-tio2-nanocomposite-film-an-excellent-material-for-energy-storage-applications-and-piezoelectric-throughput
#8
Md Mehebub Alam, Sujoy Kumar Ghosh, Debabrata Sarkar, Shrabanee Sen, Dipankar Mandal
Titanium dioxide (TiO2) nanoparticles (NPs) embedded γ-phase containing polyvinylidene fluoride (PVDF) nanocomposite (PNC) film turns to an excellent material for energy storage application due to an increased dielectric constant (32 at 1 kHz), enhanced electric breakdown strength (400 MV m(-1)). It also exhibits a high energy density of 4 J cm(-3) which is 25 times higher than that of virgin PVDF. 98% of the electroactive γ-phase has been acheived by the incorporation of TiO2 NPs and the resulting PNC behaves like a super-toughened material due to a dramatic improvement (more than 80%) in the tensile strength...
January 6, 2017: Nanotechnology
https://www.readbyqxmd.com/read/27895480/synthesis-of-three-arm-block-copolymer-poly-lactic-co-glycolic-acid-poly-ethylene-glycol-with-oxalyl-chloride-and-its-application-in-hydrophobic-drug-delivery
#9
Xiaowei Zhu, Chao Liu, Jianwei Duan, Xiaoyu Liang, Xuanling Li, Hongfan Sun, Deling Kong, Jing Yang
PURPOSE: Synthesis of star-shaped block copolymer with oxalyl chloride and preparation of micelles to assess the prospect for drug-carrier applications. MATERIALS AND METHODS: Three-arm star block copolymers of poly(lactic-co-glycolic acid) (3S-PLGA)-polyethylene glycol (PEG) were synthesized by ring-opening polymerization, then PEG as the hydrophilic block was linked to the terminal hydroxyl of 3S-PLGA with oxalyl chloride. Fourier-transform infrared (FT-IR) spectroscopy, gel-permeation chromatography (GPC), hydrogen nuclear magnetic resonance ((1)H-NMR) spectra, and differential scanning calorimetry were employed to identify the structure and properties of 3S-PLGA-PEG...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27890161/primary-or-secondary-tasks-dual-task-interference-between-cyclist-hazard-perception-and-cadence-control-using-cross-modal-sensory-aids-with-rider-assistance-bike-computers
#10
Chao-Yang Yang, Cheng-Tse Wu
This research investigated the risks involved in bicycle riding while using various sensory modalities to deliver training information. To understand the risks associated with using bike computers, this study evaluated hazard perception performance through lab-based simulations of authentic riding conditions. Analysing hazard sensitivity (d') of signal detection theory, the rider's response time, and eye glances provided insights into the risks of using bike computers. In this study, 30 participants were tested with eight hazard perception tasks while they maintained a cadence of 60 ± 5 RPM and used bike computers with different sensory displays, namely visual, auditory, and tactile feedback signals...
March 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/27889272/can-muscle-coordination-explain-the-advantage-of-using-the-standing-position-during-intense-cycling
#11
Nicolas A Turpin, Antony Costes, Pierre Moretto, Bruno Watier
OBJECTIVES: When compared to seated, the standing position allows the production of higher power outputs during intense cycling. We hypothesized that muscle coordination could explain this advantage. To test this hypothesis, we assessed muscle activity over a wide range of power outputs for both seated and standing cycling positions. DESIGN: Nine lower limb muscle activities from seventeen untrained volunteers were recorded during cycling sequences performed in the seated and the standing positions at power outputs ranging from ∼100 to 700W at 90±5 revolutions-per-minute (RPM)...
November 17, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27888444/first-report-of-raoiella-indica-hirst-acari-tenuipalpide-in-southern-brazil
#12
F T Hata, J E P Silva, M U Ventura, A Pasini, S Roggia
The red palm mite (RPM), Raoiella indica (Hirst) (Acari: Tenuipalpidae), was found for the first time in the Paraná State, in southern Brazil. The first observations occurred in September 2015, on strawberry (Fragaria × ananassa Duch) leaves, which is not considered a typical host plant of RPM. It is probable that its occurrence on this plant was serendipitous. Visual surveys for RPM were carried out on four typical host plants (banana, coconut, foxtail palm, and real palm), in five cities of the Paraná State (Bela Vista do Paraíso, Londrina, Maringá, Marialva, and Sarandi)...
November 26, 2016: Neotropical Entomology
https://www.readbyqxmd.com/read/27886051/a-laminar-flow-based-microfluidic-tesla-pump-via-lithography-enabled-3d-printing
#13
Mohammed-Baker Habhab, Tania Ismail, Joe Fujiou Lo
Tesla turbine and its applications in power generation and fluid flow were demonstrated by Nicholas Tesla in 1913. However, its real-world implementations were limited by the difficulty to maintain laminar flow between rotor disks, transient efficiencies during rotor acceleration, and the lack of other applications that fully utilize the continuous flow outputs. All of the aforementioned limits of Tesla turbines can be addressed by scaling to the microfluidic flow regime. Demonstrated here is a microscale Tesla pump designed and fabricated using a Digital Light Processing (DLP) based 3D printer with 43 µm lateral and 30 µm thickness resolutions...
November 23, 2016: Sensors
https://www.readbyqxmd.com/read/27883160/highly-repeatable-generation-of-very-small-nanoparticles-by-pulsed-laser-ablation-in-liquids-of-a-high-speed-rotating-target
#14
A Resano-Garcia, S Champmartin, Y Battie, A Koch, A En Naciri, A Ambari, N Chaoui
By irradiating a cylindrical silver target rotated at a high-speed within the range 300-2400 rpm (lateral speed 0.16-1.25 m s(-1)) in pure water, we prepare ligand-free Ag nanoparticles (NPs) with a size of 4 ± 2 nm which are likely to be primary particles. Usually, the generation of NPs showing such a small size requires either a laser post-treatment and/or chemical additives. As the rotation rate of the target is increased, calculated 3D flow patterns revealed different hydrodynamic regimes which clearly influence the ablation rate and repeatability of the process as well as the colloidal properties...
November 24, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27882557/laboratory-scale-milling-of-whole-durum-flour-quality-effect-of-mill-configuration-and-seed-conditioning
#15
Lingzhu Deng, Frank A Manthey
BACKGROUND: Research was conducted to develop a laboratory milling procedure to make whole-durum flour. An ultra-centrifugal mill was evaluated by determining the effect of mill configuration and seed conditioning on particle size distribution and quality of whole-wheat flour. RESULTS: Particle size of whole-wheat flour decreased as screen aperture decreased from 1,000 to 250 µm; as rotor speed increased from 6,000 to 18,000 rpm; and as seed conditioning moisture content decreased from 150 to 90 g kg(-1) ...
November 23, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27879622/ultrasound-assisted-extraction-centrifugation-and-ultrafiltration-multistage-process-for-polyphenol-recovery-from-purple-sweet-potatoes
#16
Zhenzhou Zhu, Tian Jiang, Jingren He, Francisco J Barba, Giancarlo Cravotto, Mohamed Koubaa
This work provides an evaluation of an ultrasound-assisted, combined extraction, centrifugation and ultrafiltration process for the optimal recovery of polyphenols. A purple sweet potato (PSP) extract has been obtained using ultrasonic circulating extraction equipment at a power of 840 W, a frequency of 59 kHz and using water as solvent. Extract ultrafiltration, using polyethersulfone (PES), was carried out for the recovery of polyphenol, protein and anthocyanin. Pre-treatment, via the centrifugation of purple sweet potato extract at 2500 rpm over 6 min, led to better polyphenol recovery, with satisfactory protein removal (reused for future purposes), than PSP extract filtration without centrifugation...
November 20, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27878628/global-deformation-parameters-response-to-exercise-in-adolescents-with-repaired-tetralogy-of-fallot
#17
Timur Mese, Baris Guven, Murat Muhtar Yilmazer, Mustafa Demirol, Şenay Çoban, Cem Karadeniz
Exercise stress echocardiography is rarely used in the follow-up of children with congenital heart disease following surgical repair. There are no data on global longitudinal strain (GLS) and global circumferential strain (GCS) during exercise in adolescents with repaired tetralogy of Fallot (TOF). The purpose of this prospective study was to investigate GLS and GCS using speckle tracking two-dimensional echocardiography (2D-STE) at rest and during exercise in adolescents with repaired TOF. Twenty patients with repaired TOF and 20 controls were included...
November 23, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27866481/effect-of-inoculum-age-and-physical-parameters-on-in-vitro-culture-of-the-entomopathogenic-nematode-steinernema-feltiae
#18
L G Leite, D I Shapiro-Ilan, S Hazir, M A Jackson
Entomopathogenic nematodes (EPNs) of the families Steinernematidae and Heterorhabditidae have a symbiotic association with bacteria which makes them virulent against insects. EPNs have been mass produced using in vivo and in vitro methods, including both solid and liquid fermentation. This study assessed the effect of nematode inoculum age on the production of Steinernema feltiae in liquid, solid and biphasic processes. Several physical parameters were also assessed: the effect of medium viscosity, flask size and aeration speed on the recovery and yield of infective juveniles (IJs)...
November 21, 2016: Journal of Helminthology
https://www.readbyqxmd.com/read/27856036/antipyrine-removal-by-tio2-photocatalysis-based-on-spinning-disc-reactor-technology
#19
A J Expósito, D A Patterson, W S W Mansor, J M Monteagudo, E Emanuelsson, I Sanmartín, A Durán
The photo-degradation of the emerging contaminant antipyrine (AP) was studied and optimized in a novel photocatalytic spinning disc reactor (SDR). A heterogeneous process (UV/H2O2/TiO2) was used. TiO2 was immobilized on the surface of a glass disc using a sol-gel method. A factorial design of experiments followed by a Neural Networks fitting allowed the optimal conditions to be determined for treating 50 mg/L of AP. Under these conditions (pH = 4; [H2O2]0 = 1500 mg/L; disc speed = 500 rpm; flowrate = 25 mL/s), AP was completely degraded in 120 min and regeneration of the disc allowed 10 cycles with no loss in efficiency...
November 14, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27851793/two-step-production-of-phenylpyruvic-acid-from-l-phenylalanine-by-growing-and-resting-cells-of-engineered-escherichia-coli-process-optimization-and-kinetics-modeling
#20
Ying Hou, Gazi Sakir Hossain, Jianghua Li, Hyun-Dong Shin, Long Liu, Guocheng Du, Jian Chen
Phenylpyruvic acid (PPA) is widely used in the pharmaceutical, food, and chemical industries. Here, a two-step bioconversion process, involving growing and resting cells, was established to produce PPA from l-phenylalanine using the engineered Escherichia coli constructed previously. First, the biotransformation conditions for growing cells were optimized (l-phenylalanine concentration 20.0 g·L-1, temperature 35°C) and a two-stage temperature control strategy (keep 20°C for 12 h and increase the temperature to 35°C until the end of biotransformation) was performed...
2016: PloS One
keyword
keyword
47070
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"