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https://www.readbyqxmd.com/read/28532116/antibacterial-mechanical-and-surface-properties-of-ag-dlc-films-prepared-by-dual-pld-for-medical-applications
#1
P Písařík, M Jelínek, J Remsa, J Mikšovský, J Zemek, K Jurek, Š Kubinová, J Lukeš, J Šepitka
Silver doped diamond-like carbon layers were deposited by dual pulsed laser deposition using two KrF excimer lasers. The concentration of Ag, determined by XPS and WDS, moved from zero to ~10at%. We found that the sp(2)/sp(3) ratio, film roughness and the number of droplets (SEM and AFM) increased with increasing silver concentration. The sp(3) content measurement (XPS) was influenced by ion cluster surface sputtering and varied from 71.0% (undoped DLC) to 36.2% (for 9.3at% Ag). Transmission was measured on the scale from 200nm to 1100nm, and decreased with increasing silver content...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532088/mussel-inspired-surface-modification-of-titania-nanotubes-as-a-novel-drug-delivery-system
#2
Negin Khoshnood, Ali Zamanian, Abouzar Massoudi
Titania nanotubes (TNTs) have attracted considerable attention for the development of new devices for local drug delivery applications. In this study TNTs were synthesized by hydrothermal method from titania nanoparticles and then the surface of TNTs were functionalized by in situ polymerization of bioinspired polydopamine (PDA). The proposed strategies emphasized on remarkable properties of these materials and their unique combination to design local drug delivery system with advanced performance. The samples were characterized using Transmission Electron Microscope (TEM), Field Emission Scanning Electron Microscope (FESEM), X-ray diffraction pattern (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and surface area analysis (BET)...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532014/advanced-review-of-graphene-based-nanomaterials-in-drug-delivery-systems-synthesis-modification-toxicity-and-application
#3
REVIEW
Qi Zhang, Zhuona Wu, Ning Li, Yiqiong Pu, Bing Wang, Tong Zhang, Jiansheng Tao
The discovery of graphene, a notable achievement in the field of novel carbon nanomaterials, has triggered the worldwide exploration of the biomedical applications of this material since 2004 because of its unique properties. The two-dimensional planar structure, large surface area, chemical stability, mechanical stability, and good biocompatibility of graphene are promising for applications in drug delivery systems (DDSs). In this review, we briefly discuss the characteristics, synthesis, and modification of graphene...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531999/zro2-toughened-al2o3-based-near-net-shaped-femoral-head-unique-fabrication-approach-3d-microstructure-burst-strength-and-muscle-cell-response
#4
Debasish Sarkar, Sourav Mandal, B S Reddy, Nitu Bhaskar, D C Sundaresh, Bikramjit Basu
The development of reliable biomedical devices demands the use of an integrated manufacturing protocol with comprehensive understanding of prototype characterization in terms of 3D microstructural analysis along with biocompatibility. While addressing these issues for ZrO2 (3mol% Y2O3 stabilized)-toughened Al2O3-based femoral head prototypes, the present work reports a unique fabrication protocol involving a sequence of uniaxial compaction followed by pre-sintering, machining, final sintering and polishing to ensure dimensional tolerance with respect to the design of patient-specific femoral head...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531969/biogeographical-factors-affecting-the-distribution-of-stream-salamanders-on-the-cumberland-plateau-usa
#5
P R Gould, K K Cecala, S S Drukker, B A McKenzie, C Van de Ven
Geophysical and climate conditions play an important role in the distribution of organisms at both fine and broad scales. Headwater streams integrate changes at broad geographical scales and serve as important regions of nutrient processing and support high biodiversity. Stream salamanders are important members of headwater aquatic communities as both predators and prey. Combined with their biphasic life histories and physiological requirements, stream amphibians may serve as indicators for headwater stream conditions...
May 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531958/unique-postglacial-evolution-of-the-hornbeam-carpinus-betulus-l-in-the-carpathians-and-the-balkan-peninsula-revealed-by-chloroplast-dna
#6
Dragoş Postolache, Flaviu Popescu, Ladislav Paule, Dalibor Ballian, Peter Zhelev, Sorina Fărcaş, Juraj Paule, Ovidiu Badea
The Balkan Peninsula is one of the largest and most important European glacial refugia. However, the evolutionary history and phylogeographic pattern of temperate tree species that survived in the Balkans glacial refugia and their contribution to the genetic structure of the current population in the Carpathian Mountains remains poorly understood. Using polymerase chain reaction - restriction fragment length polymorphism (PCR-RFLP), and extensive population sampling, we explored the phylogeographic pattern of Carpinus betulus in both the Balkan Peninsula and the Carpathian region...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531870/an-unusual-case-of-jaundice-biliary-tumor-thrombus-in-fibrolamellar-hepatocellular-carcinoma
#7
Jairo A Espinosa, Alex Merlo, Mohamed-Omar Arafeh, Gitonga Munene
BACKGROUND: Fibrolamellar hepatocellular carcinoma (FL-HCC) is a rare and unique variant of hepatocellular carcinoma (HCC) whose presentation remains inadequately described. We present a resectable case of FL-HCC which involved tumor thrombus of the common bile duct. PRESENTATION: A 27 year-old male presenting with jaundice, abdominal pain, vomiting, hepatic dysfunction and hyperbilirubinemia was found to have a large liver mass and lymphadenopathy on preoperative imaging...
May 12, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28531814/targeting-egfr-her2-heterodimerization-with-a-novel-anti-her2-domain-ii-iii-antibody
#8
Xiaojie Yu, Lingfei Wang, Yafeng Shen, Chao Wang, Yajun Zhang, Yanchun Meng, Yang Yang, Beibei Liang, Bo Zhou, Huajing Wang, Huafeng Wei, Changhai Lei, Shi Hu, Bohua Li
HER2, a ligand-free tyrosine kinase receptor of the HER family, is frequently overexpressed in breast cancer. The anti-HER2 antibody trastuzumab has shown significant clinical benefits in metastatic breast cancer. Despite the effectiveness of trastuzumab, its efficacy remains variable and often modest. Thus, there is an urgent need to improve ErbB2-targeting therapy. Here, we describe a novel anti-HER2 antibody, 7C3, which was developed using hybridoma technique. Structural analysis confirms that the epitope of this antibody is in domain II/III of HER2...
May 19, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28531550/barriers-and-facilitators-in-providing-oral-care-to-nursing-home-residents-from-the-perspective-of-care-aides-a-systematic-review-and-meta-analysis
#9
REVIEW
Matthias Hoben, Alix Clarke, Kha Tu Huynh, Nadia Kobagi, Angelle Kent, Huimin Hu, Raissa A C Pereira, Tianyuan Xiong, Kexin Yu, Hongjin Xiang, Minn N Yoon
BACKGROUND: Oral health of nursing home residents is generally poor, with severe consequences for residents' general health and quality of life and for the health care system. Care aides in nursing homes provide up to 80% of direct care (including oral care) to residents, but providing oral care is often challenging. Interventions to improve oral care must tailor to identified barriers and facilitators to be effective. This review identifies and synthesizes the evidence on barriers and facilitators care aides perceive in providing oral care to nursing home residents...
May 11, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/28531453/protected-time-for-nutrition-support-teams-what-are-the-benefits
#10
Guilherme D Ceniccola, Wilma M C Araújo, Ione de Brito-Ashurst, Henrique B Abreu, Rita de C Akutsu
BACKGROUND & AIMS: Nutrition support teams (NSTs) are important and unique entities in acute care hospitals. Despite their utility, NSTs are lacking in the majority of hospitals worldwide and where they exist, most members only spend a fraction of their time working within that role. We aim to evaluate the effect of protected time on NST performance by assessing the influence of structure and process in NST activities. METHODS: All large public hospitals (>250 beds) in the Brazilian Federal District were evaluated with a structured questionnaire designed to assess NST performance...
December 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531272/a-novel-isoform-of-tet1-that-lacks-a-cxxc-domain-is-overexpressed-in-cancer
#11
Charly R Good, Jozef Madzo, Bela Patel, Shinji Maegawa, Nora Engel, Jaroslav Jelinek, Jean-Pierre J Issa
TET1 oxidizes methylated cytosine into 5-hydroxymethylcytosine (5hmC), resulting in regulation of DNA methylation and gene expression. Full length TET1 (TET1FL) has a CXXC domain that binds to unmethylated CpG islands (CGIs). This CXXC domain allows TET1 to protect CGIs from aberrant methylation, but it also limits its ability to regulate genes outside of CGIs. Here, we report a novel isoform of TET1 (TET1ALT) that has a unique transcription start site from an alternate promoter in intron 2, yielding a protein with a unique translation start site...
May 22, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28531268/implementation-of-an-integrated-approach-to-the-national-hiv-aids-strategy-for-improving-human-immunodeficiency-virus-care-for-youths
#12
J Dennis Fortenberry, Linda J Koenig, Bill G Kapogiannis, Carrie L Jeffries, Jonathan M Ellen, Craig M Wilson
Importance: Youths aged 13 to 24 years old living with human immunodeficiency virus (HIV) are less likely than adults to receive the health and prevention benefits of HIV treatments, with only a small proportion having achieved sustained viral suppression. These age-related disparities in HIV continuum of care are owing in part to the unique developmental issues of adolescents and young adults as well as the complexity and fragmentation of HIV care and related services. This article summarizes a national, multiagency, and multilevel approach to HIV care for newly diagnosed youths designed to bridge some of these fragmentations by addressing National HIV/AIDS Strategy goals for people living with HIV...
May 22, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28531265/utility-of-nonhuman-primates-in-substance-use-disorders-research
#13
Matthew L Banks, Paul W Czoty, Sidney S Negus
Substance use disorders (i.e., drug addiction) constitute a global and insidious public health issue. Preclinical biomedical research has been invaluable in elucidating the environmental, biological, and pharmacological determinants of drug abuse and in the process of developing innovative pharmacological and behavioral treatment strategies. For more than 70 years, nonhuman primates have been utilized as research subjects in biomedical research related to drug addiction. There are already several excellent published reviews highlighting species differences in both pharmacodynamics and pharmacokinetics between rodents and nonhuman primates in preclinical substance abuse research...
May 20, 2017: ILAR Journal
https://www.readbyqxmd.com/read/28531264/cariprazine-exhibits-anxiolytic-and-dopamine-d3-receptor-dependent-antidepressant-effects-in-the-chronic-stress-model
#14
Vanya Duric, Mounira Banasr, Tina Franklin, Ashley Lepack, Nika Adham, Béla Kiss, István Gyertyán, Ronald S Duman
Background: Cariprazine, a D3-preferring dopamine D2/D3 receptor partial agonist, is a new antipsychotic drug recently approved in the US for the treatment of schizophrenia and bipolar mania. We recently demonstrated that cariprazine also has significant anti-anhedonic-like effects in rats subjected to chronic stress; however, the exact mechanism of action for cariprazine's antidepressant-like properties is not known. Thus, in this study we examined whether the effects of cariprazine are mediated by dopamine D3 receptors...
May 22, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28531217/store-operated-ca2-entry-supports-contractile-function-in-hearts-of-hibernators
#15
Olga V Nakipova, Alexey S Averin, Edward V Evdokimovskii, Oleg Yu Pimenov, Leonid Kosarski, Dmitriy Ignat'ev, Andrey Anufriev, Yuri M Kokoz, Santiago Reyes, Andre Terzic, Alexey E Alekseev
Hibernators have a distinctive ability to adapt to seasonal changes of body temperature in a range between 37°C and near freezing, exhibiting, among other features, a unique reversibility of cardiac contractility. The adaptation of myocardial contractility in hibernation state relies on alterations of excitation contraction coupling, which becomes less-dependent from extracellular Ca2+ entry and is predominantly controlled by Ca2+ release from sarcoplasmic reticulum, replenished by the Ca2+-ATPase (SERCA)...
2017: PloS One
https://www.readbyqxmd.com/read/28531170/potential-hominin-affinities-of-graecopithecus-from-the-late-miocene-of-europe
#16
Jochen Fuss, Nikolai Spassov, David R Begun, Madelaine Böhme
The split of our own clade from the Panini is undocumented in the fossil record. To fill this gap we investigated the dentognathic morphology of Graecopithecus freybergi from Pyrgos Vassilissis (Greece) and cf. Graecopithecus sp. from Azmaka (Bulgaria), using new μCT and 3D reconstructions of the two known specimens. Pyrgos Vassilissis and Azmaka are currently dated to the early Messinian at 7.175 Ma and 7.24 Ma. Mainly based on its external preservation and the previously vague dating, Graecopithecus is often referred to as nomen dubium...
2017: PloS One
https://www.readbyqxmd.com/read/28531141/eyes-of-things
#17
Oscar Deniz, Noelia Vallez, Jose L Espinosa-Aranda, Jose M Rico-Saavedra, Javier Parra-Patino, Gloria Bueno, David Moloney, Alireza Dehghani, Aubrey Dunne, Alain Pagani, Stephan Krauss, Ruben Reiser, Martin Waeny, Matteo Sorci, Tim Llewellynn, Christian Fedorczak, Thierry Larmoire, Marco Herbst, Andre Seirafi, Kasra Seirafi
Embedded systems control and monitor a great deal of our reality. While some "classic" features are intrinsically necessary, such as low power consumption, rugged operating ranges, fast response and low cost, these systems have evolved in the last few years to emphasize connectivity functions, thus contributing to the Internet of Things paradigm. A myriad of sensing/computing devices are being attached to everyday objects, each able to send and receive data and to act as a unique node in the Internet. Apart from the obvious necessity to process at least some data at the edge (to increase security and reduce power consumption and latency), a major breakthrough will arguably come when such devices are endowed with some level of autonomous "intelligence"...
May 21, 2017: Sensors
https://www.readbyqxmd.com/read/28531125/characterizing-dynamic-walking-patterns-and-detecting-falls-with-wearable-sensors-using-gaussian-process-methods
#18
Taehwan Kim, Jeongho Park, Seongman Heo, Keehoon Sung, Jooyoung Park
By incorporating a growing number of sensors and adopting machine learning technologies, wearable devices have recently become a prominent health care application domain. Among the related research topics in this field, one of the most important issues is detecting falls while walking. Since such falls may lead to serious injuries, automatically and promptly detecting them during daily use of smartphones and/or smart watches is a particular need. In this paper, we investigate the use of Gaussian process (GP) methods for characterizing dynamic walking patterns and detecting falls while walking with built-in wearable sensors in smartphones and/or smartwatches...
May 20, 2017: Sensors
https://www.readbyqxmd.com/read/28531096/the-lys-asp-tyr-triad-within-the-mite-allergen-der-p-1-propeptide-is-a-critical-structural-element-for-the-ph-dependent-initiation-of-the-protease-maturation
#19
Andy Chevigné, Vincenzo Campizi, Martyna Szpakowska, David Bourry, Marie-Eve Dumez, José C Martins, André Matagne, Moreno Galleni, Alain Jacquet
The major house dust mite allergen, Der p 1, is a papain-like cysteine protease expressed as an inactive precursor, proDer p 1, carrying an N-terminal propeptide with a unique structure. The maturation of the zymogen into an enzymatically-active form of Der p 1 is a multistep autocatalytic process initiated under acidic conditions through conformational changes of the propeptide, leading to the loss of its inhibitory ability and its subsequent gradual cleavage. The aims of this study were to characterize the residues present in the Der p 1 propeptide involved in the initiation of the zymogen maturation process, but also to assess the impact of acidic pH on the propeptide structure, the activity of Der p 1 and the fate of the propeptide...
May 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28531091/ab-initio-studies-of-coherent-spin-transport-in-fe-hbn-graphene-van-der-waals-multilayers
#20
Aniekan Ukpong
This paper presents the results of ab initio studies of the electronic spin manipulation, inversion, filtering and transport using a ferromagnetic multilayer heterostructure. Spin-polarized electronic structure calculations are performed based on van der Waals density functional theory to give unique insights to the generation, manipulation and transport of coherent spin conductance. By using an exact theory of the self-consistent ground state of the Fe-hBN/graphene multilayer as a model of the magnetic tunnel junction, this paper unravels the hidden asymmetries in the spin-resolved charge densities...
May 22, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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