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https://www.readbyqxmd.com/read/28719880/a-scheme-to-scientifically-and-accurately-assess-cadmium-pollution-of-river-sediments-through-consideration-of-bioavailability-when-assessing-ecological-risk
#1
Zhixin Song, Wenzhong Tang, Baoqing Shan
Evaluating heavy metal pollution status and ecological risk in river sediments is a complex task, requiring consideration of contaminant pollution levels, as well as effects of biological processes within the river system. There are currently no simple or low-cost approaches to heavy metal assessment in river sediments. Here, we introduce a system of assessment for pollution status of heavy metals in river sediments, using measurements of Cd in the Shaocun River sediments as a case study. This system can be used to identify high-risk zones of the river that should be given more attention...
July 14, 2017: Chemosphere
https://www.readbyqxmd.com/read/28714568/exposure-to-reversine-affects-the-chondrocyte-morphology-and-phenotype-in-vitro
#2
S Gasparini, F Villa, L Molfetta, E Repaci, P Castagnola, R Quarto, P Giannoni
Articular chondrocytes derived from osteoarthritic tissues (OA-HAC) show a severely reduced chondrogenic commitment. This impairment undermines their use for tissue-engineered cartilage repair, which relies on cell proliferation and growth to meet the therapeutic needs but also on efficient cell plasticity to recover the chondrogenic phenotype. Reversine (Rev), a 2,6-disubstituted purine inhibitor of spindle-assembly checkpoints, was described to convert differentiated mesenchymal cells to their undifferentiated precursors...
July 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28704392/redifferentiation-of-aged-human-articular-chondrocytes-by-combining-bone-morphogenetic-protein-2-and-melanoma-inhibitory-activity-protein-in-3d-culture
#3
Stephan Payr, Brigitte Tichy, Clemens Atteneder, Marc Michel, Thomas Tiefenboeck, Nikolaus Lang, Sylvia Nuernberger, Stefan Hajdu, Elizabeth Rosado-Balmayor, Stefan Marlovits, Christian Albrecht
Melanoma inhibitory activity (MIA) affects the differentiation to hyaline cartilage and can inhibit the osteogenic potential of bone morphogenetic protein (BMP)-2 in mesenchymal stem cells (MSC). The aim of this study was to investigate if MIA also inhibits the osteogenic potential of BMP-2 in human articular chondrocytes during redifferentiation, which may lead to a higher grade of differentiation without calcification. HAC of four female patients (mean age: 73.75 ±6.98) were seeded into 3D culture for 28 days; after adding the recombinant proteins, four groups were formed (Control, BMP-2, MIA, BMP-2+MIA)...
2017: PloS One
https://www.readbyqxmd.com/read/28693333/complication-rates-hospital-size-and-bias-in-the-cms-hospital-acquired-condition-reduction-program
#4
Lane Koenig, Samuel A Soltoff, Berna Demiralp, Akinluwa A Demehin, Nancy E Foster, Caroline Rossi Steinberg, Christopher Vaz, Scott Wetzel, Susan Xu
In 2016, Medicare's Hospital-Acquired Condition Reduction Program (HAC-RP) will reduce hospital payments by $364 million. Although observers have questioned the validity of certain HAC-RP measures, less attention has been paid to the determination of low-performing hospitals (bottom quartile) and the assignment of penalties. This study investigated possible bias in the HAC-RP by simulating hospitals' likelihood of being in the worst-performing quartile for 8 patient safety measures, assuming identical expected complication rates across hospitals...
December 1, 2016: American Journal of Medical Quality: the Official Journal of the American College of Medical Quality
https://www.readbyqxmd.com/read/28688039/using-human-artificial-chromosomes-to-study-centromere-assembly-and-function
#5
REVIEW
Oscar Molina, Natalay Kouprina, Hiroshi Masumoto, Vladimir Larionov, William C Earnshaw
Centromeres are the site of assembly of the kinetochore, which directs chromosome segregation during cell division. Active centromeres are characterized by the presence of nucleosomes containing CENP-A and a specific chromatin environment that resembles that of active genes. Recent work using human artificial chromosomes (HAC) sheds light on the fine balance of different histone post-translational modifications and transcription that exists at centromeres for kinetochore assembly and maintenance. Here, we review the use of HAC technology to understand centromere assembly and function...
July 7, 2017: Chromosoma
https://www.readbyqxmd.com/read/28685663/arthroscopic-treatment-of-osteochondral-lesions-of-the-talus-nanofracture-versus-hyaluronic-acid-based-cell-free-scaffold-with-concentration-of-autologous-bone-marrow-aspirate
#6
Mesut Tahta, Mustafa Akkaya, Safa Gursoy, Cetin Isik, Murat Bozkurt
PURPOSE: We aimed to evaluate the early clinical and radiological outcomes of arthroscopic one-stage treatment with hyaluronic acid-based cell-free scaffold (HACS) in combination with a concentration of autologous bone marrow aspirate (CBMA) technique compared to nanofracture (NF). METHODS: A retrospective evaluation was made of all the patients with focal osteochondral lesions of the talus that were treated between January 2012 and January 2015. Ninety-eight patients met the criteria and were enrolled in the study...
May 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28672835/magnetic-solid-phase-extraction-with-fe%C3%A2-o%C3%A2-molecularly-imprinted-polymers-modified-by-deep-eutectic-solvents-and-ionic-liquids-for-the-rapid-purification-of-alkaloid-isomers-theobromine-and-theophylline-from-green-tea
#7
Guizhen Li, Xiaoqin Wang, Kyung Ho Row
Different kinds of deep eutectic solvents (DES) based on choline chloride (ChCl) and ionic liquids (ILs) based on 1-methylimidazole were used to modify Fe3O4/molecularly imprinted polymers (Fe3O4/MIPs), and the resulting materials were applied for the rapid purification of alkaloid isomers (theobromine and theophylline) from green tea with magnetic solid-phase extraction (M-SPE). The M-SPE procedure was optimized using the response surface methodology (RSM) to analyze the maximum conditions. The materials were characterized by Fourier transform infrared spectroscopy (FI-IR) and field emission scanning electron microscopy (FE-SEM)...
June 25, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28668751/coupling-biological-assays-with-diffusive-gradients-in-thin-films-technique-to-study-the-biological-responses-of-eisenia-fetida-to-cadmium-in-soil
#8
Xueyuan Gu, Zhimin Liu, Xiaorong Wang, Jun Luo, Hao Zhang, William Davison, Lena Q Ma, Yingang Xue
This work sets out to investigate biological responses of Eisenia fetida to Cd, based on the bioavailable rather than total concentration of Cd, in soils. E. fetida was cultured for 14d in three selected Chinese soils amended with 0.1-40mgkg(-1) Cd. Potentially bioavailable concentrations of Cd were measured in soil solution, in extractions using CaCl2 and HAc solutions, and using the technique of diffusive gradients in thin-films (DGT). Antioxidant system responses in E. fetida to Cd were measured as biological endpoints...
June 21, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28654274/studies-on-the-behavior-of-eucalyptol-and-terpinen-4-ol-natural-food-additives-and-ecological-pesticides-in-model-lipid-membranes
#9
Katarzyna Hąc-Wydro, Michał Flasiński, Marcin Broniatowski, Monika Sołtys
Effective application of the essential oils requires detailed exploration of their mechanism of action and the origin of diverse activity of their components. In this work, the influence of eucalyptol and terpinen-4-ol on artificial membranes was studied to verify whether the differences in the activity of these compounds are related to their effect on membranes. The properties of monolayers formed from structurally different lipids in the presence of terpenes were examined based on the results of the surface pressure-area measurements, penetration studies, and Brewster angle microscopy experiments...
June 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28652016/overall-effectiveness-of-rivaroxaban-in-patients-with-pulmonary-embolism
#10
Li Wang, Onur Baser, Phil Wells, W Frank Peacock, Craig I Coleman, Gregory J Fermann, Jeff Schein, Concetta Crivera
PURPOSE: Due to limited evidence on the impact of rivaroxaban in clinical practice, we compared the effectiveness of rivaroxaban versus standard of care (SOC) among patients in the Veterans Health Administration. METHODS: Adult patients with continuous enrollment in a health plan with medical and pharmacy benefits for ≥12 months before and ≥3 months after an inpatient diagnosis of pulmonary embolism (PE) between October 1, 2011, and June 30, 2015, and a prescription claim for an anticoagulant during the index hospitalization, were included...
June 23, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28649836/anion-dependent-assembly-of-heterometallic-3d-4f-clusters-based-on-a-lacunary-polyoxometalate
#11
Jing Cai, Xiu-Ying Zheng, Jing Xie, Zhi-Hao Yan, Xiang-Jian Kong, Yan-Ping Ren, La-Sheng Long, Lan-Sun Zheng
A series of heterometallic 3d-4f clusters, formulated as Na17[Ln3(H2O)5Ni(II)(H2O)3(Sb4O4)(SbW9O33)3(Ni(II)W6O24)(WO2)3(CH3COO)]·(H2O)65 [abbreviated as Ln3Ni2, where Ln = La(3+) (1), Pr(3+) (2), and Nd(3+) (3)], K5Na11[Ln3(H2O)3Ni(II)3(H2O)6(SbW9O33)3(WO4)(CO3)]·(H2O)40 [abbreviated as Ln3Ni3, where Ln = La(3+) (4), Pr(3+) (5), and Nd(3+) (6)], and K3Na27[Ln3Ni(II)9(μ3-OH)9(SbW9O33)2(PW9O34)3(CH3COO)3]·(H2O)80 [abbreviated as Ln3Ni9, where Ln = Dy(3+) (7) and Er(3+) (8)], were obtained through the reaction of the lacunary {SbW9O33} precursor with Ln(NO3)3·6H2O and NiCl2·6H2O in a NaAc/HAc buffer in the presence of different anions...
July 17, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28647020/reprint-of-a-comprehensive-review-of-group-level-model-performance-in-the-presence-of-heteroscedasticity-can-a-single-model-control-type-i-errors-in-the-presence-of-outliers
#12
Jeanette A Mumford
Even after thorough preprocessing and a careful time series analysis of functional magnetic resonance imaging (fMRI) data, artifact and other issues can lead to violations of the assumption that the variance is constant across subjects in the group level model. This is especially concerning when modeling a continuous covariate at the group level, as the slope is easily biased by outliers. Various models have been proposed to deal with outliers including models that use the first level variance or that use the group level residual magnitude to differentially weight subjects...
July 1, 2017: NeuroImage
https://www.readbyqxmd.com/read/28594185/double-magnetic-relaxation-and-magnetocaloric-effect-in-the-mn9-w-cn-8-6-4-4-dpds-4-cluster-based-network
#13
Piotr Konieczny, Szymon Chorazy, Robert Pełka, Klaudia Bednarek, Tadeusz Wasiutyński, Stanisław Baran, Barbara Sieklucka, Robert Podgajny
Cyanide-bridged {Mn(II)9[W(V)(CN)8]6} clusters with the ground state spin SSG = 39/2 were connected by a 4,4'-dipyridyl disulfide (4,4'-dpds) linker into 2-D double-connected coordination layers of the I(0)O(2) type, {Mn(II)9(4,4'-dpds)4(MeOH)16[W(V)(CN)8]6}·12MeOH (1). The intercluster contacts are controlled by the bridging Mn(II)-(4,4'-dpds)-Mn(II) coordination modes and direct hydrogen bonds W-CN···HOMeOH-Mn in three crystallographic directions, with the vertex-to-vertex contact unprecedented in {Mn9W6}-based networks dominating over the typical edge-to-edge contacts...
June 8, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28581730/tellurotungstate-based-organotin-rare-earth-heterometallic-hybrids-with-four-organic-components
#14
Qing Han, Jian-Cai Liu, Yue Wen, Li-Juan Chen, Jun-Wei Zhao, Guo-Yu Yang
A family of unprecedented tellurotungstate-based organotin-rare-earth (RE) heterometallic hybrids [H2N(CH3)2]6H12Na2 {[Sn(CH3)W2O4(IN)][(B-α-TeW8O31)RE(H2O) (Ac)]2}2·25H2O [RE = Ce(III) (1), Pr(III) (2), Nd(III) (3), Sm(III) (4), Eu(III) (5), Gd(III) (6), Tb(III) (7); HIN = isonicotinic acid, HAc = acetic acid] were synthesized and characterized by elemental analyses, IR spectra, UV spectra, thermogravimetric analyses, powder X-ray diffraction, and single-crystal X-ray diffraction. The polyoxoanionic skeletons {[Sn(CH3)W2O4(IN)][(B-α-TeW8O31)RE(H2O) (Ac)]2}2(20-) of 1-7 are constructed from two symmetrical units {[Sn(CH3)W2O4(IN)][(B-α-TeW8O31)RE(H2O) (Ac)]2}(10-) linked by two acetate connectors, which not only represent the first inorganic-organic hybrid RE-substituted tellurotungstates involving three different organic ligands, but also stand for the first samples of organotin-RE heterometallic polyoxometalate derivatives...
June 5, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28575991/electrospun-pcl-gelatin-composite-nanofiber-structures-for-effective-guided-bone-regeneration-membranes
#15
Ke Ren, Yi Wang, Tao Sun, Wen Yue, Hongyu Zhang
Guided bone regeneration (GBR) membranes have been proved of great benefit for bone tissue engineering due to the improvement of cell attachment and proliferation. To develop GBR membranes with better biocompatibility and more proper degradation ability, here we fabricated polycaprolactone (PCL, polymer)/gelatin (protein) hybrid nanofibrous GBR membranes via electrospinning, followed by crosslinking with genipin. Acetic acid (HAc) was utilized to resolve the phase separation of PCL and gelatin, therefore homogeneous PCL/gelatin hybrid nanofibers with different ratios were successfully prepared...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28569157/effects-of-sesamin-on-chondroitin-sulfate-proteoglycan-synthesis-induced-by-interleukin-1beta-in-human-chondrocytes
#16
Warunee Srisuthtayanont, Dumnoensun Pruksakorn, Prachya Kongtawelert, Peraphan Pothacharoen
BACKGROUND: Numerous studies have reported on the health benefits of sesamin, a major lignin found in sesame (S. indicum) seeds. Recently, sesamin was shown to have the ability to promote chondroitin sulfate proteoglycan synthesis in normal human chondrocytes. This study assesses the anti-inflammatory effect of sesamin on proteoglycans production in 3D chondrocyte cultures. METHODS: To evaluate the effects of sesamin on IL-1β-treated human articular chondrocytes (HAC) pellets, the pellets were pre-treated with IL-1β then cultured in the presence of various concentrations of sesamin for 21 days...
May 31, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28557714/innovative-use-of-the-electronic-health-record-to-support-harm-reduction-efforts
#17
Daniel Hyman, Jenae Neiman, Michael Rannie, Renee Allen, Marguerite Swietlik, Andrea Balzer
BACKGROUND AND OBJECTIVES: Awareness of the impact of preventable harm on patients and families has resulted in extensive efforts to make our health care systems safer. We determined that, in our hospital, patients experienced 1 of 9 types of preventable harm approximately every other day. In an effort to expedite early identification of patients at risk and provide timely intervention, we used the electronic health record's (EHR) documentation to enable decision support, data capture, and auditing and implemented reporting tools to reduce rates of harm...
May 2017: Pediatrics
https://www.readbyqxmd.com/read/28554616/essential-oils-as-food-eco-preservatives-model-system-studies-on-the-effect-of-temperature-on-limonene-antibacterial-activity
#18
Katarzyna Hąc-Wydro, Michał Flasiński, Karolina Romańczuk
Antimicrobial properties of essential oils predestine these substances to be used as ecological food preservatives. However, their activity is determined by variety of factors among which external conditions and food properties are highly important. Herein the influence of limonene on artificial membranes was studied to verify the effect of temperature on the incorporation of this compound into model bacterial membrane. The investigations were done on lipid monolayers and the experiments involved the surface pressure-area measurements, penetration studies and Brewster Angle Microscopy analysis...
November 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28554111/retrieval-of-au-ag-cu-precious-metals-coupled-with-electric-energy-production-via-an-unconventional-coupled-redox-fuel-cell-reactor
#19
Hui-Min Zhang, Zheng Fan, Wei Xu, Xiao Feng, Zu-Cheng Wu
The recovery of heavy metals from aqueous solutions or e-wastes is of upmost importance. Retrieval of Au, Ag, and Cu with electricity generation through building an ethanol-metal coupled redox fuel cells (CRFCs) is demonstrated. The cell was uniquely assembled on PdNi/C anode the electro-oxidation of ethanol takes place to give electrons and then go through the external circuit reducing metal ions to metallic on the cathode, metals are recovered. Taking an example of removal of 100mgL(-1) gold in 0.5M HAc-NaAc buffer solution as the catholyte, 2...
May 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28551363/salamanders-on-the-bench-a-biocompatibility-study-of-salamander-skin-secretions-in-cell-cultures
#20
Janek von Byern, Dietrich Mebs, Egon Heiss, Ursula Dicke, Oliver Wetjen, Kristin Bakkegard, Ingo Grunwald, Susanne Wolbank, Severin Mühleder, Alfred Gugerell, Heidemarie Fuchs, Sylvia Nürnberger
Salamanders have evolved a wide variety of antipredator mechanisms and behavior patterns, including toxins and noxious or adhesive skin secretions. The high bonding strength of the natural bioadhesives makes these substances interesting for biomimetic research and applications in industrial and medical sectors. Secretions of toxic species may help to understand the direct effect of harmful substances on the cellular level. In the present study, the biocompatibility of adhesive secretions from four salamander species (Plethodon shermani, Plethodon glutinosus, Ambystoma maculatum, Ambystoma opacum) were analyzed using the MTT assay in cell culture and evaluated against toxic secretions of Pleurodeles waltl, Triturus carnifex, Pseudotriton ruber, Tylototriton verrucosus, and Salamandra salamandra...
May 25, 2017: Toxicon: Official Journal of the International Society on Toxinology
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