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https://www.readbyqxmd.com/read/29334637/contamination-characteristics-and-source-apportionment-of-heavy-metals-in-topsoil-from-an-area-in-xi-an-city-china
#1
Xiuduan Chen, Xinwei Lu
As soil-extractable elements potentially pose ecological and health risks, identifying their contamination characteristics and sources is crucial. Therefore, to understand topsoil trace elements in the urban ring zone from the Second Ring Road to the Third Ring of Xi'an city in China, we determined the concentrations of Zn, Co, V, As, Cu, Mn, Ba, Ni and Pb, and analyzed the sources of the contamination. The results showed that the individual pollution indices of Pb, Co, Cu, Zn, Ba, Ni, Mn, As, and V were 1...
January 11, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29334347/methods-to-describe-referral-patterns-in-a-canadian-primary-care-electronic-medical-record-database-modelling-multilevel-count-data
#2
Bridget L Ryan, Joshua Shadd, Heather Maddocks, Moira Stewart, Amardeep Thind, Amanda L Terry
  A referral from a family physician (FP) to a specialist is an inflection point in the patient journey, with potential implications for clinical outcomes and health policy. Primary care electronic medical record (EMR) databases offer opportunities to examine referral patterns. Until recently, software techniques were not available to model these kinds of multi-level count data. OBJECTIVE:  To establish methodology for determining referral rates from FPs to medical specialists using the Canadian Primary Care Sentinel Surveillance Network (CPCSSN) EMR database...
November 17, 2017: Journal of Innovation in Health Informatics
https://www.readbyqxmd.com/read/29333902/patterns-of-nps-use-and-risk-reduction-in-slovenia
#3
Matej Sande, Mina Paš, Klara Nahtigal, Simona Šabić
BACKGROUND: The following study presents factors influencing the decision to use/not to use new psychoactive substances (NPS), various patterns of NPS use, the problems experienced by users, and the methods for reducing the risks associated with NPS use. OBJECTIVES: The study seeks to provide an in-depth look into the characteristics of NPS use and support the planning of targeted interventions in the field of NPS. METHODS: The study involved 19 in-depth interviews carried out with 25 individuals divided into three subsamples in order to gain insight into the various experiences of NPS users...
January 15, 2018: Substance Use & Misuse
https://www.readbyqxmd.com/read/29333763/polymer-passivated-inorganic-cesium-lead-mixed-halide-perovskites-for-stable-and-efficient-solar-cells-with-high-open-circuit-voltage-over-1-3-v
#4
Qingsen Zeng, Xiaoyu Zhang, Xiaolei Feng, Siyu Lu, Zhaolai Chen, Xue Yong, Simon A T Redfern, Haotong Wei, Haiyu Wang, Huaizhong Shen, Wei Zhang, Weitao Zheng, Hao Zhang, John S Tse, Bai Yang
Cesium-based trihalide perovskites have been demonstrated as promising light absorbers for photovoltaic applications due to their superb composition stability. However, the large energy losses (Eloss ) observed in inorganic perovskite solar cells has become a major hindrance impairing the ultimate efficiency. Here, an effective and reproducible method of modifying the interface between a CsPbI2 Br absorber and polythiophene hole-acceptor to minimize the Eloss is reported. It is demonstrated that polythiophene, deposited on the top of CsPbI2 Br, can significantly reduce electron-hole recombination within the perovskite, which is due to the electronic passivation of surface defect states...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29333692/measuring-spatial-and-temporal-trends-of-nicotine-and-alcohol-consumption-in-australia-using-wastewater-based-epidemiology
#5
Foon Yin Lai, Coral Gartner, Wayne Hall, Steve Carter, Jake O'Brien, Benjamin J Tscharke, Frederic Been, Cobus Gerber, Jason White, Phong Thai, Raimondo Bruno, Jeremy Prichard, K Paul Kirkbride, Jochen F Mueller
BACKGROUND AND AIMS: Tobacco and alcohol consumption remain priority public health issues worldwide. As participation in population-based surveys has fallen, it is increasingly challenging to estimate accurately the prevalence of alcohol and tobacco use. Wastewater-based epidemiology (WBE) is an alternative approach for estimating substance use at the population level that does not rely on survey participation. This study examined spatio-temporal patterns in nicotine (a proxy for tobacco) and alcohol consumption in the Australian population via WBE...
January 14, 2018: Addiction
https://www.readbyqxmd.com/read/29333478/a-general-method-for-intracellular-protein-delivery-through-e-tag-protein-engineering-and-arginine-functionalized-gold-nanoparticles
#6
Rubul Mout, Vincent M Rotello
In this protocol, we describe a method for direct cytosolic protein delivery that avoids endosomal entrapment of the delivered proteins. We achieved this by tagging the desired protein with an oligo glutamic acid tag (E-tag), and subsequently using carrier gold nanoparticles to deliver these E-tagged proteins. When E-tagged proteins and nanoparticles were mixed, they formed nanoassemblies, which got fused to cell membrane upon incubation and directly released the E-tagged protein into cell cytosol. We used this method to deliver a wide variety of proteins with different sizes, charges, and functions in various cell lines (Mout et al...
December 20, 2017: Bio-protocol
https://www.readbyqxmd.com/read/29332813/fast-and-easy-extraction-of-antidepressants-from-whole-blood-using-ionic-liquids-as-extraction-solvent
#7
Marieke De Boeck, Lisa Dubrulle, Wim Dehaen, Jan Tytgat, Eva Cuypers
This study aims to prove that ionic liquids (ILs) can be used as extraction solvents in a liquid-liquid microextraction, coupled to LC-MS/MS, for the quantification of a large group of antidepressants in whole blood samples. The sample preparation procedure consisted of adding 1.0mL aqueous buffer pH 3.0 and 60µL of IL (1-butyl-3-methylimidazolium hexafluorophosphate) to 1.0mL whole blood. Subsequently, a 5-min rotary mixing step was performed followed by centrifugation. The lower IL phase was collected, diluted 1:10 in methanol and 10µL was injected into the LC-MS/MS...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29332509/sexual-scripts-and-criminal-statutes-gender-restrictions-spousal-allowances-and-victim-accountability-after-rape-law-reform
#8
Ethan Czuy Levine
The author provides a mixed-methods assessment of U.S. rape statutes to assess progress in reform. Contemporary statutes offer restrictive frameworks for distinguishing criminal from noncriminal sexual violence, many of which are grounded in gendered and heterosexist assumptions. Fourteen states retain gender restrictions in rape statutes. Twenty maintain marital distinctions that limit accountability for spousal rape. Furthermore, whereas explicit resistance requirements have been eliminated nationwide, implicit resistance expectations manifest through emphasis on physical force and involuntary intoxication...
February 1, 2017: Violence Against Women
https://www.readbyqxmd.com/read/29332296/plant-cell-cultures-as-model-systems-to-study-programmed-cell-death
#9
Sara Cimini, Maria Beatrice Ronci, Elisabetta Barizza, Maria Concetta de Pinto, Vittoria Locato, Fiorella Lo Schiavo, Laura De Gara
The study of programmed cell death (PCD) activated in a certain group of cells is complex when analyzed in the whole plant. Plant cell suspension cultures are useful when investigating PCD triggered by environmental and developmental stimuli. Due to their homogeneity and the possibility to synchronize their responses induced by external stimuli, these cultures are used for studying the signaling pathways leading to PCD. The first problem in the analysis of PCD in cell cultures is the quantification of cell viability/death over time...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29332055/operating-room-scheduling-and-surgeon-assignment-problem-under-surgery-durations-uncertainty
#10
Hongwei Liu, Tianyi Zhang, Shuai Luo, Dan Xu
BACKGROUND: Scientific management methods are urgently needed to balance the demand and supply of heath care services in Chinese hospitals. Operating theatre is the bottleneck and costliest department. Therefore, the surgery scheduling is crucial to hospital management. OBJECTIVE: To increase the utilization and reduce the cost of operating theatre, and to improve surgeons' satisfaction in the meantime, a practical surgery scheduling which could assign the operating room (OR) and surgeon for the surgery and sequence surgeries in each OR was provided for hospital managers...
December 29, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29331976/concealment-of-type-1-diabetes-at-work-in-finland-a-mixed-method-study
#11
Pirjo Hakkarainen, Fehmidah Munir, Leena Moilanen, Kimmo Räsänen, Vilma Hänninen
OBJECTIVES: To explore the possible reasons for concealing type 1 diabetes (T1D) at work. METHODS: The main set of data came from a cross-sectional survey (response rate 49.3%), the participants of which were 688 wage earners with T1D. Concealment of T1D was measured by asking respondents have they ever during their working career hidden their diabetes from their (A) colleagues and (B) line manager. Furthermore, semistructured interviews (n=20) were conducted to obtain deeper understanding...
January 13, 2018: BMJ Open
https://www.readbyqxmd.com/read/29331974/what-are-the-physical-and-psychological-health-effects-of-suicide-bereavement-on-family-members-an-observational-and-interview-mixed-methods-study-in-ireland
#12
Ailbhe Spillane, Karen Matvienko-Sikar, Celine Larkin, Paul Corcoran, Ella Arensman
OBJECTIVES: Research focussing on the impact of suicide bereavement on family members' physical and psychological health is scarce. The aim of this study was to examine how family members have been physically and psychologically affected following suicide bereavement. A secondary objective of the study was to describe the needs of family members bereaved by suicide. DESIGN: A mixed-methods study was conducted, using qualitative semistructured interviews and additional quantitative self-report measures of depression, anxiety and stress (DASS-21)...
January 13, 2018: BMJ Open
https://www.readbyqxmd.com/read/29331898/coadsorption-and-subsequent-redox-conversion-behaviors-of-as-iii-and-cr-vi-on-al-containing-ferrihydrite
#13
Zecong Ding, Fenglian Fu, Dionysios D Dionysiou, Bing Tang
Naturally occurring ferrihydrite often contains various impurities, and Al is one of the most prominent impurities. However, little is known about how these impurities impact the physical and chemical properties of ferrihydrite with respect to metal(loid) adsorption. In this study, a series of Al-containing ferrihydrites were synthesized and exposed to a mixed solution containing As(III) and Cr(VI). The results showed that the two contaminants can be quickly adsorbed onto the surface of Al-containing ferrihydrite under acidic and neutral conditions...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29331832/investigations-on-a-cryopreservation-protocol-for-long-term-storage-of-psittacine-spermatozoa-using-cockatiel-semen-as-an-example
#14
H Schneider, D Fischer, K Failing, C Ehling, S Meinecke-Tillmann, A Wehrend, M Lierz
The aim of the present study was the establishment of an effective protocol for cryopreservation of psittacine semen. Therefore, pooled semen samples of 30 cockatiels (Nymphicus hollandicus) were diluted with modified Lake diluent (1:4), partitioned into four equal parts. Three portions were mixed with three cryoprotectants (dimethylacetamide, dimethyl sulfoxide, glycerol) in 4%, 8% and 12% final concentration, respectively, whereas the 4rth part served as control. Altogether, 96 incremental diluted semen samples were obtained for investigation...
December 16, 2017: Theriogenology
https://www.readbyqxmd.com/read/29331786/the-meaning-of-community-in-diverse-neighborhoods-stratification-of-influence-and-mental-health
#15
Emily Walton
As the United States diversifies, individuals are increasingly encountering and managing racial and ethnic difference in their neighboring relationships, thus challenging the "cultural" basis for consensus on the local meaning of community. This mixed-methods study considers the ways in which sense of community relates to mental health in two longstanding racially- and socioeconomically-diverse neighborhoods. I ask how social resources are distributed within diverse neighborhoods, integrating survey (N = 243) and interview (N = 60) data to make observations about both the existence and nature of relationships among the unique dimensions of sense of community and mental health...
January 10, 2018: Health & Place
https://www.readbyqxmd.com/read/29331780/application-of-octanohydroxamic-acid-for-liquid-liquid-extraction-of-manganese-oxides-and-fabrication-of-supercapacitor-electrodes
#16
J Milne, I Zhitomirsky
MnO2 and Mn3O4 particles were prepared by wet chemical methods and efficiently dispersed and mixed with multiwalled carbon nanotubes (MWCNT) for the fabrication of composite MnO2-MWCNT and Mn3O4-MWCNT electrodes for electrochemical supercapacitors (ES). The problem of particle agglomeration was addressed by particle extraction through a liquid-liquid interface (PELLI) using octanohydroxamic acid (OHA) as a new extractor. OHA exhibited remarkable adsorption on particles due to a bidentate bonding mechanism. The use of OHA broadened the application of PELLI technology, because it allowed good extraction of particles from an aqueous phase at high pH...
January 6, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29331533/a-woman-s-hand-and-a-lion-s-heart-skills-and-attributes-for-rural-midwifery-practice-in-new-zealand-and-scotland
#17
Andrea Gilkison, Jean Rankin, Mary Kensington, Rea Daellenbach, Lorna Davies, Ruth Deery, Susan Crowther
OBJECTIVE: the complex and challenging nature of rural midwifery is a global issue. New Zealand and Scotland both face similar ongoing challenges in sustaining a rural midwifery workforce, and understanding the best preparation for rural midwifery practice. This study aimed to explore the range of skills, qualities and professional expertise needed for remote and rural midwifery practice. DESIGN: online mixed methods: An initial questionnaire via a confidential SurveyMonkey® was circulated to all midwives working with rural women and families in New Zealand and Scotland...
December 19, 2017: Midwifery
https://www.readbyqxmd.com/read/29331383/population-pharmacokinetics-of-high-dose-methotrexate-in-patients-with-primary-central-nervous-system-lymphoma
#18
Shenghui Mei, Xingang Li, Xueyun Jiang, Kefu Yu, Song Lin, Zhigang Zhao
The intra- and inter-individual variances of methotrexate (MTX) pharmacokinetics are extremely large, and the pharmacokinetic property of MTX in patients with primary central nervous system lymphoma (PCNSL) is unestablished. A total of 701 MTX plasma concentrations from 98 patients with PCNSL under High-dose methotrexate (HDMTX) therapy were used to develop the population pharmacokinetic (popPK) model of MTX by using the nonlinear mixed-effects modeling method. A two-compartment model was employed to describe the pharmacokinetic property of MTX...
January 10, 2018: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29331102/opposite-sex-relationship-questionnaire-for-female-adolescents-development-and-psychometric-evolution
#19
Masoumeh Sibmar, Nasim Bahrami, AbouAli Vedadhir, Hamid Alavi Majd, Averil Parker
Aim The goal of the present study is to adopt state-of-the-art techniques and standards to develop and evaluate a measure, called the opposite-sex relationship questionnaire for female adolescents (OSRQFA), to assess the reasons why adolescent girls would or would not develop, a relationship with an adolescent boy. Methods A mixed-method, sequential, exploratory design was adopted. In the qualitative phase, an in-depth interview approach was used to identify the properties and dimensions to be included in the OSRQFA...
January 13, 2018: International Journal of Adolescent Medicine and Health
https://www.readbyqxmd.com/read/29331063/simultaneous-pharmacokinetics-and-stability-studies-of-physalins-in-rat-plasma-and-intestinal-bacteria-culture-media-using-liquid-chromatography-with-mass-spectrometry
#20
Yunliang Zheng, Meihua Lin, Xingjiang Hu, You Zhai, Qiao Zhang, Yan Lou, Jianzhong ShenTu, Lihua Wu
Physalins are the major steroidal constituent of Physalis plants and display a range of biological activity. For this study, a rapid and sensitive high-performance liquid chromatography with triple quadrupole mass spectrometry method was developed for the simultaneous quantification of six physalins. Specifically, it was for the quantification of physalin A, physalin B, physalin D, physalin G, 4,7-didehydroneophysalin B and isophysalin B in rat plasma and rat intestinal bacteria. After a solid-phase extraction, analytes and internal standards (prednisolone) were separated on a Shield reverse-phase C18 column (measuring 3 mm × 150 mm with an internal diameter of 3...
January 13, 2018: Journal of Separation Science
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