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https://www.readbyqxmd.com/read/28628863/simultaneous-quantification-of-endothelin-receptor-antagonists-and-phosphodiesterase-5-inhibitors-currently-used-in-pulmonary-arterial-hypertension
#1
Yeliz Enderle, Lukas Witt, Heinrike Wilkens, Ekkehard Grünig, Walter E Haefeli, Jürgen Burhenne
Combination treatment with endothelin receptor antagonists (ERA) and phosphodiesterase 5 inhibitors (PDE5I) improved efficacy of pulmonary arterial hypertension (PAH) therapy. However, drug-drug interactions, variable exposure, non-adherence can influence plasma levels. For these reasons, drug quantification may be advantageous particularly in patients with poor treatment responses. We developed, validated, and applied an assay for the simultaneous quantification of ambrisentan, bosentan, macitentan, sildenafil, and tadalafil as well as their main (and partly active) metabolites in human plasma...
June 10, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28625676/comprehensive-determination-of-macrolide-antibiotics-their-synthesis-intermediates-and-transformation-products-in-wastewater-effluents-and-ambient-waters-by-liquid-chromatography-tandem-mass-spectrometry
#2
Ivan Senta, Ivona Krizman-Matasic, Senka Terzic, Marijan Ahel
Macrolide antibiotics are a prominent group of emerging contaminants frequently found in wastewater effluents and wastewater-impacted aquatic environments. In this work, a novel analytical method for simultaneous determination of parent macrolide antibiotics (azithromycin, erythromycin, clarithromycin and roxithromycin), along with their synthesis intermediates, byproducts, metabolites and transformation products in wastewater and surface water was developed and validated. Samples were enriched using solid-phase extraction on Oasis HLB cartridges and analyzed by reversed-phase liquid chromatography coupled to electrospray ionization tandem mass spectrometry...
June 3, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28623864/a-highly-sensitive-lc-ms-ms-method-for-simultaneous-determination-of-glycyrrhizin-and-its-active-metabolite-glycyrrhetinic-acid-application-to-a-human-pharmacokinetic-study-after-oral-administration
#3
Tsuneharu Suzuki, Michiko Tsukahara, Yuko Akasaka, Hideo Inoue
A highly sensitive liquid chromatography tandem mass spectrometry (LC-MS/MS) method for simultaneous determination of glycyrrhizin (GL) and its active metabolite, glycyrrhetinic acid (GA) from human plasma was validated and applied to a human pharmacokinetic study. The analytes were extracted from human plasma using an Oasis MAX cartridge and chromatographic separation was performed on an Inertsil ODS-3 column. The detection was performed using an API 4000 mass spectrometer operating in the positive electrospray ionization mode...
June 17, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28619486/extended-depth-of-focus-contact-lenses-vs-two-commercial-multifocals-part-2-visual-performance-after-1-week-of-lens-wear
#4
Ravi C Bakaraju, Daniel Tilia, Jennifer Sha, Jennie Diec, Jiyoon Chung, Danny Kho, Shona Delaney, Anna Munro, Varghese Thomas
PURPOSE: To compare the visual performance of prototype contact lenses designed via deliberate manipulation of higher-order spherical aberrations to extend-depth-of-focus with two commercial multifocals, after 1 week of lens wear. METHODS: In a prospective, participant-masked, cross-over, randomized, 1-week dispensing clinical-trial, 43 presbyopes [age: 42-63 years] each wore AIROPTIX Aqua multifocal (AOMF), ACUVUE OASYS for presbyopia (AOP) and extended-depth-of-focus prototypes (EDOF) appropriate to their add requirements...
June 12, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28618339/hplc-ms-ms-method-for-troventol-determination-in-human-plasma-and-its-application-to-biological-samples
#5
Aleksandra Nikitina, Alexander Grigoriev, Alla Sidorova
For the first time, an HPLC-MS/MS method for the determination pmol/l levels of troventol (TRV) and clenbuterol as an internal standard (IS) in human plasma was developed, validated and tested on biological samples. The method included solid phase extraction by Waters Oasis WCX cartridges and chromatographic separation on a YMC-Pack SIL (100mm×2.1mm, 5μm, 12nm) analytical column with acetonitrile-water-formic acid (50:50:0.1, v/v/v) as the mobile phase; the selected ion transitions were m/z 332.2→138.2 and m/z 277...
April 29, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28617854/choroidal-thickness-in-school-children-the-gobi-desert-children-eye-study
#6
Dan Zhu, Yan Wang, Yan Fei Zheng, Da Yong Yang, Kai Guo, Xian Rong Yang, Xin Xia Jing, Ian Y Wong, Qi Sheng You, Yong Tao, Jost B Jonas
PURPOSE: To investigate choroidal thickness (CT) and its associations in children in a school-based study. METHODS: The cross-sectional school-based Gobi Desert Children Eye Study included 1565 out of 1911 (81.9%) eligible children from all schools in the oasis region of Ejina in the Gobi Desert. A detailed ophthalmic examination was performed, including spectral-domain optical coherence tomography with enhanced depth imaging for CT measurement. RESULTS: CT measurements were available for 1463 (93...
2017: PloS One
https://www.readbyqxmd.com/read/28611750/nutrient-stoichiometry-shapes-microbial-community-structure-in-an-evaporitic-shallow-pond
#7
Zarraz M-P Lee, Amisha T Poret-Peterson, Janet L Siefert, Drishti Kaul, Ahmed Moustafa, Andrew E Allen, Chris L Dupont, Luis E Eguiarte, Valeria Souza, James J Elser
Nutrient availability and ratios can play an important role in shaping microbial communities of freshwater ecosystems. The Cuatro Ciénegas Basin (CCB) in Mexico is a desert oasis where, perhaps paradoxically, high microbial diversity coincides with extreme oligotrophy. To better understand the effects of nutrients on microbial communities in CCB, a mesocosm experiment was implemented in a stoichiometrically imbalanced pond, Lagunita, which has an average TN:TP ratio of 122 (atomic). The experiment had four treatments, each with five spatial replicates - unamended controls and three fertilization treatments with different nitrogen:phosphorus (N:P) regimes (P only, N:P = 16 and N:P = 75 by atoms)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28606456/extended-depth-of-focus-contact-lenses-vs-two-commercial-multifocals-part-1-optical-performance-evaluation-via-computed-through-focus-retinal-image-quality-metrics
#8
Ravi C Bakaraju, Klaus Ehrmann, Arthur Ho
PURPOSE: To compare the computed optical performance of prototype lenses designed using deliberate manipulation of higher-order spherical aberrations to extend depth-of-focus (EDOF) with two commercial multifocals. METHODS: Emmetropic, presbyopic, schematic eyes were coupled with prototype EDOF and commercial multifocal lenses (Acuvue Oasys for presbyopia, AOP, Johnson & Johnson & Air Optix Aqua multifocal, AOMF, Alcon). For each test configuration, the through-focus retinal image quality (TFRIQ) values were computed over 21 vergences, ranging from -0...
June 9, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28606157/semiarid-ethnoagroforestry-management-tajos-in-the-sierra-gorda-guanajuato-mexico
#9
Vincent M Hoogesteger van Dijk, Alejandro Casas, Ana Isabel Moreno-Calles
BACKGROUND: The semi-arid environments harbor nearly 40% of biodiversity, and half of indigenous cultures of Mexico. Thousands of communities settled in these areas depend on agriculture and using wild biodiversity for their subsistence. Water, soil, and biodiversity management strategies are therefore crucial for people's life. The tajos, from Sierra Gorda, are important, poorly studied, biocultural systems established in narrow, arid alluvial valleys. The systems are constructed with stone-walls for capturing sediments, gradually creating fertile soils in terraces suitable for agriculture in places where it would not be possible...
June 12, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28605878/an-oasis-in-the-desert-of-cancer-chemotherapeutic-resistance-the-enlightenment-from-reciprocal-crosstalk-between-signaling-pathways-of-upr-and-autophagy-in-cancers
#10
REVIEW
Yuhang Zhang, Xianjun Qu, Lingfan Jiang
Endoplasmic reticulum (ER), principal but complex, functions as the pleiotropic organelle for proper protein folding, Ca(2+) storage as well as lipid and carbohydrate metabolisms. Diverse microenviromental insults including, but not limited to, inflammatory reaction, glucose imbalance and hypoxia, elicit the accumulation of potentially toxic unfolded proteins in the ER lumen. Under the condition of these cellular threats, the autophagy with the well-orchestrated program containing over 30 autophagy-related genes (ATGs) might be initiated for degrading and recycling of the cumulative misfolded proteins and other related abnormal cytoplasmic components...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28601502/neighbourhood-deprivation-is-positively-associated-with-detection-of-the-ultra-high-risk-uhr-state-for-psychosis-in-south-east-london
#11
V Bhavsar, P Fusar-Poli, P McGuire
BACKGROUND: Individuals are defined as being at ultra-high risk (UHR) for psychosis based on a combination of attenuated psychotic symptoms, help-seeking behaviour, genetic risk, and social/occupational deterioration. Limited evidence is available on whether UHR detection differs by neighbourhood, and potential explanations. AIMS: To examine neighbourhood distribution of detected UHR using cases from the OASIS service in South East London, investigating neighbourhood deprivation as an explanatory variable...
June 8, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28600605/-solitude-religious-and-cultural-uniqueness-in-a-foreign-environment-adjustments-as-an-arab-student-for-your-consideration-to-be-published-in-your-journal
#12
Hamzeh Y Abunab, Wireen Leila T Dator, Jordan T Salvador, Mary Grace C Lacanaria
Arab-Muslims have extremely religious-centered and restrictive cultural practices. Living in a foreign country where Islam is a minority religion and culture is categorically different entails a great deal of adjustment. This study explored how Arab-Muslim International Students live and cope in a non-Arab, non-Muslim country. The authors used phenomenological approach with Colaizzi's method of analysis to (1) explore the lived experience of the Arab students' academic and social life and (2) come up with recommendations that can be supported by universities in Philippines and other countries with Arab students...
June 9, 2017: Journal of Religion and Health
https://www.readbyqxmd.com/read/28599365/the-critical-role-of-local-policy-effects-in-arid-watershed-groundwater-resources-sustainability-a-case-study-in-the-minqin-oasis-china
#13
Yuanyuan Hao, Yaowen Xie, Jinhui Ma, Wenpei Zhang
Designed as a watershed groundwater restoration policy (WGRP), the Comprehensive Treatment Program of the Shiyang River Basin (CTSRB) was launched in 2006 to restore the groundwater resources in the Minqin oasis, northwestern China. This study sought to verify the recovery effects of CTSRB implementation from the perspective of groundwater depth. We reconstructed the spatio-temporal distribution of groundwater depth at interannual and pixel scales by using digital groundwater depth models (DGDMs), based on the ordinary kriging interpolation method...
June 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28562400/prevalence-of-and-factors-related-to-prescription-opioids-benzodiazepines-and-hypnotics-among-medicare-home-health-recipients
#14
Brandi P Cotton, Matthew C Lohman, Jessica M Brooks, Karen L Whiteman, Yuhua Bao, Rebecca L Greenberg, Martha L Bruce
High rates of controlled prescription drugs are associated with cognitive impairment, falls, and misuse and dependence. Little is known about the prevalence of these medications among older adults receiving home healthcare. The purpose of this study was to determine the frequency of, and the factors related to, opioid analgesics, benzodiazepines (BNZ), and nonbenzodiazepine (NBNZH) hypnotics among a large sample of older adults entering home healthcare services. The data came from administrative records of 133 Certified Home healthcare Agencies located across 32 states...
June 2017: Home Healthcare Now
https://www.readbyqxmd.com/read/28550720/development-and-validation-of-an-uplc-uv-method-for-determination-of-a-novel-triazine-coccidiostat-ethanamizuril-and-its-metabolite-m3-in-chicken-tissues
#15
Xiao Zhao, Youfa Xu, Lifang Zhang, Chunmei Wang, Chunna Guo, Chenzhong Fei, Keyu Zhang, Xiaoyang Wang, Yingchun Liu, Mi Wang, Wenli Zheng, Feiqun Xue
Ethanamizuril (EZL) is a novel anti-coccidial triazine synthesized by the Shanghai Veterinary Research Institute of the Chinese Academy of Agricultural Sciences. As a novel coccidiostat, it is essential to study its residue in food animal tissues. In this study, a reliable UPLC method for the determination of ethanamizuril (EZL) and one of its metabolites (M3) in chicken muscle, skin and fat, liver, and kidney samples was developed. Analytes were extracted using acetonitrile and 10% sodium carbonate solution, defatted by n-hexane, and further purified by using an Oasis MCX cartridge...
August 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28550633/the-efficiency-of-the-multi-walled-carbon-nanotubes-used-for-antibiotics-removal-from-wastewaters-generated-by-animal-farms
#16
Maria-Loredana Soran, Ocsana Opriş, Ildikó Lung, Irina Kacso, Alin S Porav, Manuela Stan
In the recent years, residual antibiotics are considered to be emerging environmental pollutants due to their continuous input and persistence into the aquatic ecosystem even at low concentrations. Therefore, these are necessary to develop efficient methods for the wastewater treatment. The present paper describes the efficiency of several types of multi-walled carbon nanotubes (MWCNTs) for the retention of the selected antibiotics (ampicillin, ceftazidime, cefepime, imipenem, piperacillin, tazobactam, tetracycline, erythromycin, ciprofloxacin, norfloxacin, vancomycin, gentamicin, sulfamethoxazole, and thrimetoprim) from aqueous (synthetic) solutions and wastewater samples...
May 27, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28544989/impact-of-mediolateral-episiotomy-on-incidence-of-obstetrical-anal-sphincter-injury-diagnosed-by-endoanal-ultrasound
#17
Kristina Drusany Staric, Adolf Lukanovic, Petra Petrocnik, Vita Zacesta, Corrado Cescon, Miha Lucovnik
OBJECTIVE: to examine potential association between mediolateral episiotomy and reduced incidence of obstetrical anal sphincter injuries (OASIS) diagnosed by endoanal ultrasound. DESIGN: prospective cohort study. SETTING: tertiary referral university hospital. PARTICIPANTS: sixty nulliparous women at 28-33 weeks of gestation with singleton pregnancies were included between 2010 and 2012. MEASUREMENTS AND FINDINGS: participants were examined with endoanal ultrasound at 28-33 weeks gestation and at 6-7 weeks post-partum...
May 18, 2017: Midwifery
https://www.readbyqxmd.com/read/28523401/functional-and-quality-of-life-outcomes-following-obstetric-anal-sphincter-injury-oasi-does-the-grade-of-injury-affect-outcomes
#18
Lisa Ramage, Clarence Yen, Shengyang Qiu, Constantinos Simillis, Christos Kontovounisios, Paris Tekkis, Emile Tan
INTRODUCTION AND HYPOTHESIS: The aim of this study was to compare functional and quality of life data in patients with increasing grades of obstetric anal sphincter injury (OASI) presenting to a tertiary colorectal pelvic floor clinic within 24 months of delivery. METHODS: Prospective data were collected from the patients for the period 2009-2016 and included data on functional outcomes and motor anorectal manometry parameters. The instruments used for the evaluation of functional outcomes were the Birmingham Bowel and Urinary Symptoms Questionnaire, the Wexner Incontinence Score, Short Form 36, and the Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire...
May 18, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28521190/simultaneous-determination-of-bisphenol-a-and-estrogens-in-hair-samples-by-liquid-chromatography-electrospray-tandem-mass-spectrometry
#19
Chaelin Lee, Chong Hyeak Kim, Sunghwan Kim, Sung-Hee Cho
Bisphenol A (BPA), an endocrine disrupter, is widely used to make chemicals for polycarbonate, plastics, beverage containers, epoxy resins, and cash register receipts. BPA is one of the known xenoestrogens, which have weak estrogenic activity and cause obesity, diabetes, breast cancer, and reproductive disorders. Even though the concentration level of metabolomes in hair is usually lower than that in urine and blood, there are several reasons why we chose to use hair samples. First, the sampling procedure of hairs is simple...
May 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28521060/diagnostic-and-prognostic-significance-of-dsm-5-attenuated-psychosis-syndrome-in-services-for-individuals-at-ultra-high-risk-for-psychosis
#20
Paolo Fusar-Poli, Andrea De Micheli, Marco Cappucciati, Grazia Rutigliano, Cathy Davies, Valentina Ramella-Cravaro, Dominic Oliver, Ilaria Bonoldi, Matteo Rocchetti, Lauren Gavaghan, Rashmi Patel, Philip McGuire
Background: The diagnostic and prognostic significance of the DSM-5-defined Attenuated Psychosis Syndrome (DSM-5-APS) in individuals undergoing an ultra high risk (UHR) clinical assessment for suspicion of psychosis risk is unknown. Methods: Prospective cohort study including all consecutive help-seeking individuals undergoing both a DSM-5-APS and a Comprehensive Assessment of At Risk Mental States (CAARMS 12/2006) assessment for psychosis risk at the Outreach and Support in South London (OASIS) UHR service (March 2013-April 2014)...
May 17, 2017: Schizophrenia Bulletin
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