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https://www.readbyqxmd.com/read/28922634/functionalisation-of-ti6al4v-and-hydroxyapatite-surfaces-with-combined-peptides-based-on-kklpda-and-eeeeeeee-peptides
#1
Gabriela Melo Rodriguez, James Bowen, David Grossin, Besim Ben-Nissan, Artemis Stamboulis
Surface modifications are usually performed on titanium alloys to improve osteo-integration and surface bioactivity. Modifications such as alkaline and acid etching, or coating with bioactive materials such as hydroxyapatite, have previously been demonstrated. The aim of this work is to develop a peptide with combined titanium oxide and hydroxyapatite binders in order to achieve a biomimetic hydroxyapatite coating on titanium surfaces. The technology would also be applicable for the functionalisation of titanium and hydroxyapatite surfaces for selective protein adsorption, conjugation of antimicrobial peptides, and adsorption of specialised drugs for drug delivery...
September 9, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28922403/the-declining-interest-in-an-academic-career
#2
Michael Roach, Henry Sauermann
There is increasing evidence that science & engineering PhD students lose interest in an academic career over the course of graduate training. It is not clear, however, whether this decline reflects students being discouraged from pursuing an academic career by the challenges of obtaining a faculty job or whether it reflects more fundamental changes in students' career goals for reasons other than the academic labor market. We examine this question using a longitudinal survey that follows a cohort of PhD students from 39 U...
2017: PloS One
https://www.readbyqxmd.com/read/28921683/corticospinal-responses-following-strength-training-a-systematic-review-and-meta-analysis
#3
REVIEW
Dawson J Kidgell, Daniel R Bonanno, Ashlyn K Frazer, Glyn Howatson, Alan J Pearce
Strength-training results in changes in skeletal muscle, however, changes in the central nervous system also occur. Over the last 15 years, non-invasive brain stimulation techniques, such as transcranial magnetic stimulation, have been used to study the neural adaptations to strength-training. This review explored the hypothesis that the neural adaptations to strength-training may be due to changes in corticospinal excitability and inhibition and, such changes, contribute to the gain in strength following strength-training...
September 18, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28921405/cannabis-associated-asthma-and-allergies
#4
REVIEW
J M Chatkin, L Zani-Silva, I Ferreira, N Zamel
Inhalation of cannabis smoke is its most common use and the pulmonary complications of its use may be the single most common form of drug-induced pulmonary disease worldwide. However, the role of cannabis consumption in asthma patients and allergic clinical situations still remains controversial. To review the evidence of asthma and allergic diseases associated with the use of marijuana, we conducted a search of English, Spanish, and Portuguese medical using the search terms asthma, allergy, marijuana, marihuana, and cannabis...
September 18, 2017: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/28920606/microbial-separation-from-a-complex-matrix-by-a-hand-held-microfluidic-device
#5
Renu Singh, John Brockgreitens, Olga Saiapina, Yan Wu, Abdennour Abbas
Through a simple chemical activation of biomolecules present in the outer structures of microbial cells, microorganisms can be rapidly isolated on gold-coated surfaces in a microfluidic device with over 99% capture efficiency. Bacterial and fungal cells can be selectively captured, concentrated and retrieved for further analysis.
September 18, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28920008/seven-year-course-of-borderline-personality-disorder-features-borderline-pathology-is-as-unstable-as-depression-during-adolescence
#6
Christopher C Conway, Alison E Hipwell, Stephanie D Stepp
Borderline personality disorder (PD) historically is construed as an unremitting condition with poor prognosis. The present study takes a new approach to examining stability and change in borderline PD by explaining symptom expression in terms of an unchanging foundation-termed borderline proneness-on one hand, and transitory influences on the other. We monitored borderline PD symptoms annually in a large sample of high-risk adolescent girls (N = 2,450) from ages 14 to 20. Trait-state-occasion modeling revealed that just over half (52-57%) of borderline PD symptom variation was attributable to fixed borderline proneness, whereas the remainder was subject to change across yearly measurement occasions...
July 2017: Clinical Psychological Science
https://www.readbyqxmd.com/read/28919806/how-stable-are-quantitative-sensory-testing-measurements-over-time-report-on-10-week-reliability-and-agreement-of-results-in-healthy-volunteers
#7
Helen Nothnagel, Christian Puta, Thomas Lehmann, Philipp Baumbach, Martha B Menard, Brunhild Gabriel, Holger H W Gabriel, Thomas Weiss, Frauke Musial
BACKGROUND: Quantitative sensory testing (QST) is a diagnostic tool for the assessment of the somatosensory system. To establish QST as an outcome measure for clinical trials, the question of how similar the measurements are over time is crucial. Therefore, long-term reliability and limits of agreement of the standardized QST protocol of the German Research Network on Neuropathic Pain were tested. METHODS: QST on the lower back and hand dorsum (dominant hand) were assessed twice in 22 healthy volunteers (10 males and 12 females; mean age: 46...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28919628/coronary-artery-bypass-graft-with-endarterectomy-and-stent-removal-in-patient-with-multivessel-in-stent-restenosis
#8
S S Husain, C M Ahmed, A B Adhikary, S A Sunny, M N Hasan
In the age of stent deployment after balloon angioplasty. In stent restenosis (ISR) has become a major concern. Various coronary interventional measures and coronary artery bypass graft (CABG) has employed to manage the ISR. Although CABG seems to offer advantages over other coronary intervention methods in patients with multi vessel ISR; lack of appropriate graftable vessels often make the surgery difficult and end up with incomplete revascularization. Coronary endarterectomy with stent removal mitigated some of the limitations of CABG but initial results of this surgical measure were not favorable...
July 2017: Mymensingh Medical Journal: MMJ
https://www.readbyqxmd.com/read/28919470/preparation-and-characterization-of-amorphous-ciprofloxacin-amino-acid-salts
#9
Hanah Mesallati, Daryl Conroy, Sarah Hudson, Lidia Tajber
The amorphization of the poorly soluble drug ciprofloxacin (CIP) may be facilitated by the use of a suitable stabilizer. In this study seven amino acids, with various side chain properties, were evaluated in this regard. Solid dispersions were prepared by ball milling 1:1 molar ratios of CIP with the amino acids, and their solid-state and pharmaceutical properties were then examined. Fully X-ray amorphous solid dispersions were obtained with aspartic acid, glutamic acid, cysteine and arginine. In each case, evidence of salt formation between the drug and amino acids was found via Fourier transform infrared spectroscopy and solid-state nuclear magnetic resonance...
September 14, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28917252/stereotactic-radiosurgery-of-the-brain-a-review-of-common-indications
#10
Philip Gilbo, Isabella Zhang, Jonathan Knisely
Over the past half-century since Lars Leksell first utilized radiation to address deep and difficult to treat lesions of the central nervous system (CNS), intracranial stereotactic radiosurgery (SRS) has become an increasingly valued tool in the hands of neurosurgeons and radiation oncologists. Following developments in medical imaging and radiation technology, radiosurgery has evolved from its first application in movement disorders to widespread use for a varied range of malignant and benign conditions. SRS remains a powerful, minimally invasive instrument that offers additional options for intervention to a diverse patient population...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28917120/automated-arteriole-and-venule-classification-using-deep-learning-for-retinal-images-from-the-uk-biobank-cohort
#11
R A Welikala, P J Foster, P H Whincup, A R Rudnicka, C G Owen, D P Strachan, S A Barman
The morphometric characteristics of the retinal vasculature are associated with future risk of many systemic and vascular diseases. However, analysis of data from large population based studies is needed to help resolve uncertainties in some of these associations. This requires automated systems that extract quantitative measures of vessel morphology from large numbers of retinal images. Associations between retinal vessel morphology and disease precursors/outcomes may be similar or opposing for arterioles and venules...
September 8, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28917097/development-of-motor-imagery-and-anticipatory-action-planning-in-children-with-developmental-coordination-disorder-a-longitudinal-approach
#12
Imke L J Adams, Jessica M Lust, Peter H Wilson, Bert Steenbergen
Children with impaired motor coordination (or Development Coordination Disorder - DCD) have difficulty with the predictive control of movements, evidenced by cross-sectional studies that show impaired motor imagery and action planning abilities. What remains unclear is whether this deficit in predictive control reflects immaturity of the motor system (a developmental delay) or some deviation from normal development (a disorder). To advance this discussion the present study used a longitudinal design to examine the development of motor imagery and action planning in children with DCD...
September 13, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28916894/critical-appraisal-of-the-impact-of-individual-surgeon-experience-on-the-outcomes-of-laparoscopic-liver-resection-in-the-modern-era-collective-experience-of-multiple-surgeons-at-a-single-institution-with-324-consecutive-cases
#13
Brian K P Goh, Jin-Yao Teo, Ser-Yee Lee, Juinn-Huar Kam, Peng-Chung Cheow, Premaraj Jeyaraj, Pierce K H Chow, London L P J Ooi, Alexander Y F Chung, Chung-Yip Chan
BACKGROUND: Most studies analyzing the learning experience of laparoscopic liver resection (LLR) focused on the experience of one or two expert pioneering surgeons. This study aims to critically analyze the impact of individual surgeon experience on the outcomes of LLR based on the contemporary collective experiences of multiple surgeons at single institution. METHODS: Retrospective review of 324 consecutive LLR from 2006 to 2016. The cases were performed by 10 surgeons over various time periods...
September 15, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28916882/evaluating-a-mental-health-program-for-palestinian-refugees-in-lebanon
#14
Nasser Yassin, Asma A Taha, Zeina Ghantous, Mia Malda Atoui, Fabio Forgione
Medecins sans Frontière, an international non-governmental organization, initiated a mental health program for Palestinian refugees living in Lebanon. To evaluate the impact of the program after its completion, focus groups were conducted with three target groups: (1) patients, (2) staff, and (3) local community stakeholders. Participants voiced overall satisfaction with the program. The program provided easy access, good quality care, decreased stigma, as perceived by participants, and revealed a sense of community contentedness...
September 15, 2017: Journal of Immigrant and Minority Health
https://www.readbyqxmd.com/read/28915847/absence-of-ultrasound-inflammation-in-patients-presenting-with-arthralgia-rules-out-the-development-of-arthritis
#15
Myrthe van der Ven, M van der Veer-Meerkerk, D F Ten Cate, N Rasappu, M R Kok, D Csakvari, J M W Hazes, A H Gerards, J J Luime
BACKGROUND: To decrease the burden of disease of rheumatoid arthritis (RA), patients at risk for RA need to be identified as early as possible, preferably when no clinically apparent synovitis can be detected. Up to now, it has been fairly difficult to identify those patients with arthralgia who develop inflammatory arthritis (IA), but recent studies using ultrasound (US) suggest that earlier detection is possible. We aimed to identify patients with arthralgia developing IA within 1 year using US to detect subclinical synovitis at first consultation...
September 15, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28915557/loss-of-p16-ink4a-stimulates-aberrant-mitochondrial-biogenesis-through-a-cdk4-rb-independent-pathway
#16
Ethika Tyagi, Bin Liu, Chelsea Li, Tong Liu, Jared Rutter, Douglas Grossman
The tumor suppressor p16INK4A (p16) inhibits cell cycle progression through the CDK4/Rb pathway. We have previously shown that p16 regulates cellular oxidative stress, independent of its role in cell cycle control. We investigated whether loss of p16 had a direct impact on the mitochondria. We found that p16-null primary mouse fibroblasts (PMFs) displayed increased mitochondrial mass and expression of mitochondrial respiratory subunit proteins compared to wild-type (WT) PMFs. These findings in p16-null PMFs were associated with increased expression of the mitochondrial biogenesis transcription factors PRC and TFAM...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915532/formation-mechanism-of-human-serum-albumin-monolayers-on-positively-charged-polymer-microparticles
#17
Małgorzata Nattich-Rak, Marta Sadowska, Zbigniew Adamczyk, Michał Cieśla, Małgorzata Kąkol
Human serum albumin (HSA) adsorption on positively and negatively charged polystyrene microparticles was studied at various pHs and NaCl concentrations. Thorough electrophoretic mobility measurements were carried out that enabled to monitor in situ the progress of protein adsorption. The maximum coverage of irreversibly adsorbed HSA on microparticles was determined by different concentration depletion methods, one of them involving AFM imaging of residual molecules. An anomalous adsorption of HSA on the positive microparticles was observed at pH 3...
August 31, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28913429/ultrahigh-mobility-and-efficient-charge-injection-in-monolayer-organic-thin-film-transistors-on-boron-nitride
#18
Daowei He, Jingsi Qiao, Linglong Zhang, Junya Wang, Tu Lan, Jun Qian, Yun Li, Yi Shi, Yang Chai, Wei Lan, Luis K Ono, Yabing Qi, Jian-Bin Xu, Wei Ji, Xinran Wang
Organic thin-film transistors (OTFTs) with high mobility and low contact resistance have been actively pursued as building blocks for low-cost organic electronics. In conventional solution-processed or vacuum-deposited OTFTs, due to interfacial defects and traps, the organic film has to reach a certain thickness for efficient charge transport. Using an ultimate monolayer of 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) molecules as an OTFT channel, we demonstrate remarkable electrical characteristics, including intrinsic hole mobility over 30 cm(2)/Vs, Ohmic contact with 100 Ω · cm resistance, and band-like transport down to 150 K...
September 2017: Science Advances
https://www.readbyqxmd.com/read/28912913/paraneoplastic-dermatomyositis-syndrome-presenting-as-dysphagia
#19
Emmanuel Ofori, Daryl Ramai, Mel Ona, Madhavi Reddy
Dermatomyositis (DM) is a rare autoimmune condition which predominantly affects females in the fifth and sixth decades of life. DM presents acutely or progressively as painless proximal skeletal muscle weakness and can be associated with a heliotropic rash around the eyes, and Gottron's papules on extensor surfaces of the hands. While the pathophysiology of DM is still unclear, abnormal T- and B-cell immune activity has been reported. DM has been associated with malignancy and has been shown to appear before, concurrently with, or after diagnosis of cancer...
August 2017: Gastroenterology Research
https://www.readbyqxmd.com/read/28912542/transcranial-direct-current-stimulation-tdcs-applied-to-the-left-dorsolateral-premotor-cortex-dpmc-interferes-with-rhythm-reproduction
#20
B Pollok, C L Overhagen, A Keitel, V Krause
Movement timing in the sub-second range engages a brain network comprising cortical and sub-cortical areas. The present study aims at investigating the functional significance of the left dorsolateral premotor cortex (dPMC) for precise movement timing as determined by sensorimotor synchronization and rhythm reproduction. To this end, 18 healthy volunteers performed an auditorily paced synchronization-continuation task with the right hand. A simple reaction time task served as control condition. Transcranial direct current stimulation (tDCS) was applied over the left dPMC in order to modulate cortical excitability either with anodal or cathodal polarity or as sham stimulation...
September 14, 2017: Scientific Reports
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