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https://www.readbyqxmd.com/read/28075332/-i-ab-initio-i-calculations-of-the-elastic-and-thermodynamic-properties-of-gold-under-pressure
#1
Nikolai A Smirnov
The paper presents first-principles FP-LMTO calculations on the relative stability of $fcc$, $bcc$, $hcp$ and $dhcp$ gold under pressure. They were done in Local Density Approximation (LDA), as well as in Generalized Gradient Approximation (GGA) with and without spin-orbit interaction. Phonon spectra for the considered gold structures were obtained from LDA calculations within linear response theory and the contribution of lattice vibrations to the free energy of the system was determined in quasiharmonic approximation...
January 11, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28074370/comparative-toxicity-of-nano-zno-and-bulk-zno-towards-marine-algae-tetraselmis-suecica-and-phaeodactylum-tricornutum
#2
Jiji Li, Simona Schiavo, Gabriella Rametta, Maria Lucia Miglietta, Vera La Ferrara, Changwen Wu, Sonia Manzo
The wide use of ZnO nanoparticles in a number of products implies an increasing release into the marine environment, resulting in the need to evaluate the potential effects upon organisms, and particularly phytoplankton, being at the base of the throphic chain. To this aim, dose-response curves for the green alga Tetraselmis suecica and the diatom Phaeodactylum tricornutum derived from the exposure to nano ZnO (100 nm) were evaluated and compared with those obtained for bulk ZnO (200 nm) and ionic zinc. The toxic effects to both algae species were reported as no observable effect concentration (NOEC) of growth inhibition and as 1, 10, and 50% effect concentrations (EC1, EC10, and EC50)...
January 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28069228/cu-sns-sno2-nanoparticles-as-novel-sorbent-for-dispersive-micro-solid-phase-extraction-of-atorvastatin-in-human-plasma-and-urine-samples-by-high-performance-liquid-chromatography-with-uv-detection-application-of-central-composite-design-ccd
#3
Mehdi Dastkhoon, Mehrorang Ghaedi, Arash Asfaram, Maryam Arabi, Abbas Ostovan, Alireza Goudarzi
Separation and detection of residual drug in biological fluids has directly related to human health in term of their beneficial or side effects. In biological fluid samples (complex matrix which containing drug at very low level) conduction of preliminary efficient technique as good choice for pre-concentration and clean-up of real sample before their instrumental analysis is highly recommended. In this result technique, based on nano-structure material which poses higher available surface area and larger member of reactive sites led to significant improvement in characteristic performance of analytical method...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28065382/energy-efficiency-and-pulmonary-artery-flow-after-balloon-pulmonary-angioplasty-for-inoperable-chronic-thromboembolic-pulmonary-hypertension-analysis-by-phase-contrast-mri
#4
Michinobu Nagao, Yuzo Yamasaki, Kohtaro Abe, Kazuya Hosokawa, Satoshi Kawanami, Takeshi Kamitani, Torahiko Yamanouchi, Hidetake Yabuuchi, Kenji Fukushima, Hiroshi Honda
PURPOSE: The aims of this study were to propose a new quantitative method for pulmonary artery (PA) flow energetics using phase-contrast magnetic resonance imaging (PC-MRI), and to investigate how balloon pulmonary angioplasty (BPA) impacts energetics in chronic thromboembolic pulmonary hypertension (CTEPH). MATERIALS AND METHODS: PC-MRI at 3-Teslar and with a flow sensitive gradient echo was used to examine energetics prior to and following BPA for 24 CTEPH patients...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28062541/evaluation-of-a-novel-renewable-hepatic-cell-model-for-prediction-of-clinical-cyp3a4-induction-using-a-correlation-based-ris-approach
#5
Rongjun Zuo, Feng Li, Sweta Parikh, Li Cao, Kirsten L Cooper, Yulong Hong, Jin Liu, Ronald A Faris, Daochuan Li, Hongbing Wang
Metabolism enzyme induction-mediated drug-drug interactions need to be carefully characterized in vitro for drug candidates in order to predict in vivo outcomes of safety risk and therapeutic efficiency. Currently, both the FDA and EMA recommend using primary human hepatocytes as the "Gold Standard" in vitro test system for studying the induction potential of candidate drugs on cytochrome P450 (CYP), CYP3A4, CYP1A2, and CYP2B6. However, primary human hepatocytes are known to bear inherent limitations such as limited supply and large lot-to-lot variations which result in an experimental burden to qualify new lots...
January 6, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28060545/safety-and-immunogenicity-of-adenovirus-35-tb-vaccine-candidate-in-adults-with-active-or-previous-tb-a-randomized-trial
#6
Richard N van Zyl-Smit, Aliasgar Esmail, Mary E Bateman, Rodney Dawson, Jonathan Goldin, Eva van Rikxoort, Macaya Douoguih, Maria Grazia Pau, Jerald C Sadoff, J Bruce McClain, Margaret Ann Snowden, Jacqueline Benko, David A Hokey, Kathryn Tucker Rutkowski, Andrew Graves, Barbara Shepherd, Sadritdin Ishmukhamedov, Benjamin M N Kagina, Brian Abel, Willem A Hanekom, Thomas J Scriba, Eric D Bateman
RATIONALE: Administration of tuberculosis vaccines in participants with previous or current pulmonary tuberculosis may have the potential for causing harmful post-vaccination immunological (Koch-type) reactions. OBJECTIVES: To assess the safety and immunogenicity of three dose levels of the AERAS-402 live, replication-deficient adenovirus 35-vectored tuberculosis candidate vaccine, containing three mycobacterial antigens, in individuals with current or previous pulmonary tuberculosis...
January 6, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28060026/exponential-decay-metrics-of-topical-tetracaine-hydrochloride-administration-describe-corneal-anesthesia-properties-mechanistically
#7
Jason Ethington, David Goldmeier, Bruce I Gaynes
PURPOSE: To identify pharmacodynamic (PD) and pharmacokinetic (PK) metrics that aid in mechanistic understanding of dosage considerations for prolonged corneal anesthesia. METHODS: A rabbit model using 0.5% tetracaine hydrochloride was used to induce corneal anesthesia in conjunction with Cochet-Bonnet anesthesiometry. Metrics were derived describing PD-PK parameters of the time-dependent domain of recovery in corneal sensitivity. Curve fitting used a 1-phase exponential dissociation paradigm assuming a 1-compartment PK model...
January 4, 2017: Cornea
https://www.readbyqxmd.com/read/28051340/altered-tolbutamide-pharmacokinetics-by-a-decrease-in-hepatic-expression-of-cyp2c6-11-in-rats-pretreated-with-5-fluorouracil
#8
Shuhei Fukuno, Katsuhito Nagai, Keita Kasahara, Yuki Mizobata, Sachiko Omotani, Yasutoshi Hatsuda, Michiaki Myotoku, Hiroki Konishi
We investigated the change in the pharmacokinetic profile of tolbutamide (TB), a substrate for CYP2C6/11, 4 days after single administration of 5-fluorouracil (5-FU), and the hepatic gene expression and activity of CYP2C6/11 were also examined in 5-FU-pretreated rats. Regarding the pharmacokinetic parameters of the 5-FU group, the area under the curve (AUC) was significantly increased, and correspondingly, the elimination rate constant at the terminal phase (ke) was significantly decreased without significant change in the volume of distribution at the steady state (Vdss)...
January 4, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/28048671/su-f-t-104-determining-the-ntcp-parameters-of-pharyngeal-constrictors-and-proximal-esophagus-for-radiation-induced-swallowing-problems-recorded-six-months-after-radiation-therapy-for-head-and-neck-tumors
#9
P Mavroidis, A Price, M Kostich, R Amdur, W Mendenhall, N Sheets, R Green, S Das, L Marks, B Chera
PURPOSE: To estimate the radiobiological parameters of four NTCP models that describe the dose-response relations of pharyngeal constrictors and proximal esophagus regarding the severity of patient reported swallowing problems 6 months post chemo-radiotherapy. To identify the section/structure that best correlates with the manifestation of the clinical endpoints. Finally, to compare the goodness-of-fit of those models. METHODS: Forty-three patients were treated on a prospective multi-institutional phase II study for oropharyngeal squamous cell carcinoma...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048247/we-fg-202-10-assessing-hepatocellular-carcinoma-hcc-response-to-sbrt-using-dce-mri
#10
Y Yuan, M Buckstein, M Chao, K Rosenzweig, Y Lo
PURPOSE: To investigate the feasibility of using DCE-MRI to assess treatment response of HCC to SBRT. METHODS: For seven liver HCC patients treated by photon SBRT with radiation dose ranging from 35 to 50 Gy in 5 fractions, T1-weighted DCE-MRI was performed before and at 1-3 months after the treatment. Each study included one pre-contrast and five post Gd-EOB-DTPA-enhanced imaging series. The target tumor and the liver were manually outlined on the arterial phase images...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046893/su-d-204-05-fitting-four-ntcp-models-to-treatment-outcome-data-of-salivary-glands-recorded-six-months-after-radiation-therapy-for-head-and-neck-tumors
#11
P Mavroidis, A Price, M Kostich, R Amdur, W Mendenhall, N Sheets, R Green, S Das, L Marks, B Chera
PURPOSE: To estimate the radiobiological parameters of four popular NTCP models that describe the dose-response relations of salivary glands to the severity of patient reported dry mouth 6 months post chemo-radiotherapy. To identify the glands, which best correlate with the manifestation of those clinical endpoints. Finally, to evaluate the goodness-of-fit of the NTCP models. METHODS: Forty-three patients were treated on a prospective multiinstitutional phase II study for oropharyngeal squamous cell carcinoma...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28040419/a-novel-treatment-strategy-for-newly-diagnosed-high-grade-t1-bladder-cancer-gemcitabine-and-cisplatin-adjuvant-chemotherapy-a-single-institution-experience
#12
Guo-Liang Yang, Lian-Hua Zhang, Qiang Liu, Zhao-Liang Wang, Xue-Hui Duan, Yi-Ran Huang, Juan-Jie Bo
BACKGROUND: Management of high-grade T1 (formerly T1G3) bladder cancer continues to be controversial. Should patients with T1G3 bladder cancer have an immediate radical cystectomy or should they receive intravesical bacillus Calmette-Guérin-preserving bladder? Gemcitabine and cisplatin (GC) adjuvant chemotherapy may help to strike a balance between intravesical and early cystectomy. For purposes of this study, we continue to refer high-grade T1 lesion as "T1G3." OBJECTIVE: To evaluate the characteristics and the long-term outcome of GC adjuvant chemotherapy in T1G3 bladder cancer after transurethral resection of bladder tumor (TURBT)...
December 28, 2016: Urologic Oncology
https://www.readbyqxmd.com/read/28039780/an-empirical-model-of-activity-in-macaque-inferior-temporal-cortex
#13
Salman Khan, Bryan Tripp
There are compelling computational models of many properties of the primate ventral visual stream, but a gap remains between the models and the physiology. To facilitate ongoing refinement of these models, we have compiled diverse information from the electrophysiology literature into a statistical model of inferotemporal (IT) cortex responses. This is a purely descriptive model, so it has little explanatory power. However it is able to directly incorporate a rich and extensible set of tuning properties. So far, we have approximated tuning curves and statistics of tuning diversity for occlusion, clutter, size, orientation, position, and object selectivity in early versus late response phases...
December 13, 2016: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28036410/interactive-book-reading-to-accelerate-word-learning-by-kindergarten-children-with-specific-language-impairment-identifying-an-adequate-intensity-and-variation-in-treatment-response
#14
Holly L Storkel, Krista Voelmle, Veronica Fierro, Kelsey Flake, Kandace K Fleming, Rebecca Swinburne Romine
Purpose: This study sought to identify an adequate intensity of interactive book reading for new word learning by children with specific language impairment (SLI) and to examine variability in treatment response. Method: An escalation design adapted from nontoxic drug trials (Hunsberger, Rubinstein, Dancey, & Korn, 2005) was used in this Phase I/II preliminary clinical trial. A total of 27 kindergarten children with SLI were randomized to 1 of 4 intensities of interactive book reading: 12, 24, 36, or 48 exposures...
December 30, 2016: Language, Speech, and Hearing Services in Schools
https://www.readbyqxmd.com/read/28036169/low-initial-modulus-biodegradable-polyurethane-elastomers-for-soft-tissue-regeneration
#15
Cancan Xu, Yihui Huang, Liping Tang, Yi Hong
The mechanical match between synthetic scaffold and host tissue remains challenging in tissue regeneration. The elastic soft tissues exhibit low initial moduli with a J-shaped tensile curve. The suitable synthetic polymer scaffolds requires low initial modulus and elasticity. To achieve these requirements, random copolymers poly(δ-valerolactone-co-ε-caprolactone) (PVCL) and hydrophilic poly(ethylene glycol) (PEG) were combined into a triblock copolymer PVCL-PEG-PVCL, which was used as a soft segment to synthesize a family of biodegradable elastomeric polyurethanes with low initial moduli...
December 30, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28035225/specificity-and-sensitivity-assessment-of-selected-nasal-provocation-testing-techniques
#16
Edyta Krzych-Fałta, Konrad Furmańczyk, Bolesław Samoliński
INTRODUCTION: Nasal provocation testing involves an allergen-specific local reaction of the nasal mucosa to the administered allergen. AIM: To determine the most objective nasal occlusion assessment technique that could be used in nasal provocation testing. MATERIAL AND METHODS: A total of 60 subjects, including 30 patients diagnosed with allergy to common environmental allergens and 30 healthy subjects were enrolled into the study. The method used in the study was a nasal provocation test with an allergen, with a standard dose of a control solution and an allergen (5,000 SBU/ml) administered using a calibrated atomizer into both nostrils at room temperature...
December 2016: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/28033584/identification-bioactivity-evaluation-and-pharmacokinetics-of-multiple-components-in-rat-serum-after-oral-administration-of-xian-ling-gu-bao-capsule-by-ultra-performance-liquid-chromatography-coupled-with-quadrupole-time-of-flight-tandem-mass-spectrometry
#17
Zhi-Hong Yao, Zi-Fei Qin, Liang-Liang He, Xin-Luan Wang, Yi Dai, Ling Qin, Frank J Gonzalez, Wen-Cai Ye, Xin-Sheng Yao
The Xian-Ling-Gu-Bao capsule (XLGB) is a famous traditional Chinese medicine prescription (TCMP), which has proven effective in osteoporosis treatment. However, due to the lack of a dynamic XLGB profile, the in vivo pharmacokinetics of multiple bioactive components within this medicine remains unknown. In the present study, ultra-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry (UPLC/Q-TOF-MS) identified a total of eighteen prototypes (using reference standards) in rat serum after oral administration of XLGB...
January 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28032670/prospective-study-of-definitive-chemoradiation-in-locally-or-regionally-advanced-squamous-cell-carcinoma-of-the-skin
#18
Michelle K Nottage, Charles Lin, Brett G M Hughes, Lizbeth Kenny, David D Smith, Kathleen Houston, Alessandra Francesconi
BACKGROUND: The purpose of this study was to present our evaluation of the outcomes of concurrent chemoradiotherapy (CRT) in patients with locally advanced cutaneous squamous cell carcinoma (SCC). METHODS: This was a prospective phase II study. The primary endpoint was complete response (CR). Patients with locally/regionally advanced cutaneous SCC deemed unsuitable for surgery received definitive radiotherapy (RT; 70 Gy in 35fractions) and concurrent weekly platinum-based chemotherapy (cisplatin 40 mg/m2 or carboplatin area under the curve 2)...
December 29, 2016: Head & Neck
https://www.readbyqxmd.com/read/28028994/an-open-label-multicenter-phase-i-trial-of-a-cremophor-free-polymeric-micelle-formulation-of-paclitaxel-combined-with-carboplatin-as-a-first-line-treatment-for-advanced-ovarian-cancer-a-korean-gynecologic-oncology-group-study-kgog-3016
#19
Shin Wha Lee, Yong Man Kim, Young Tae Kim, Soon Beom Kang
OBJECTIVE: This phase I study aimed to determine the maximum tolerated dose (MTD) of Genexol-PM, when combined with carboplatin, as a first-line treatment in patients with advanced ovarian cancer. METHODS: This open-label, multicenter, phase I, dose-escalation study included 18 patients (median age: 59.0 years, range: 40-75 years) diagnosed with advanced epithelial ovarian cancer. All patients had measurable residual disease after debulking surgery. Patients were assigned to groups (n=6 each group) that received different doses of Genexol-PM (220, 260, and 300 mg/m², once every 3 weeks) and 5 area under the curve (AUC) carboplatin...
December 19, 2016: Journal of Gynecologic Oncology
https://www.readbyqxmd.com/read/28025965/pharmacokinetics-and-safety-of-nifedipine-gits-candesartan-fixed-dose-combination-in-subjects-with-hepatic-impairment%C3%A2
#20
Yuwang Liu, Michael-Friedrich Boettcher, Anja Schmidt, Sigrun Unger, Atef Halabi, Erich Brendel, Hartmut Blode
OBJECTIVE: To investigate the pharmacokinetic (PK) profiles and safety of nifedipine and candesartan after a single oral dose of nifedipine gastrointestinal therapeutic system (GITS) 30 mg/candesartan cilexetil 8 mg (N30/C8 mg) fixed-dose combination (FDC) in adults with mild to moderate hepatic impairment. METHODS: A phase I, single-center, non-randomized, non-controlled, non-blinded, observational study (N = 32). PK profiles for nifedipine and candesartan were assessed in patients with mild (Child-Pugh A; group 1) or moderate (Child-Pugh B; group 2) hepatic impairment and compared with age- and gender-matched healthy controls (groups 3 and 4) following a single dose of N30/C8 FDC...
December 27, 2016: International Journal of Clinical Pharmacology and Therapeutics
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