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https://www.readbyqxmd.com/read/28345045/bend-stretch-and-touch-locating-a-finger-on-an-actively-deformed-transparent-sensor-array
#1
Mirza Saquib Sarwar, Yuta Dobashi, Claire Preston, Justin K M Wyss, Shahriar Mirabbasi, John David Wyndham Madden
The development of bendable, stretchable, and transparent touch sensors is an emerging technological goal in a variety of fields, including electronic skin, wearables, and flexible handheld devices. Although transparent tactile sensors based on metal mesh, carbon nanotubes, and silver nanowires demonstrate operation in bent configurations, we present a technology that extends the operation modes to the sensing of finger proximity including light touch during active bending and even stretching. This is accomplished using stretchable and ionically conductive hydrogel electrodes, which project electric field above the sensor to couple with and sense a finger...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28344105/a-new-reconstructed-human-epidermis-rhe-for-in-vitro-skin-irritation-testing
#2
Tatiana do Nascimento Pedrosa, Carolina Motter Catarino, Paula Comune Pennacchi, Sílvia Romano de Assis, Fabrícia Gimenes, Márcia Edilaine Lopes Consolaro, Silvia Berlanga de Moraes Barros, Silvya Stuchi Maria-Engler
Different models of reconstructed human epidermis (RHE) are currently validated to assess skin irritation in vitro and ultimately to the animal replacement of the Draize test. The development of a new RHE model is a challenge for many laboratories, representing a potential gain of autonomy and improvement of technological knowledge. The Organization for Economic Co-operation and Development (OECD) encourages the development of new models and, for this purpose, offers a thorough guideline on quality control parameters (OECD TG 439)...
March 23, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28343035/evaluation-of-4-methylcyclohexanemethanol-mchm-in-a-combined-irritatancy-and-local-lymph-node-assay-llna-in-mice
#3
Victor J Johnson, Scott S Auerbach, Michael I Luster, Suramya Waidyanatha, Scott A Masten, Mary S Wolfe, Florence G Burleson, Gary R Burleson, Dori R Germolec
4-Methylcyclohexanemethanol (MCHM) is a flotation reagent used in fine coal beneficiation. On January 9, 2014, crude MCHM, a mixture containing predominantly MCHM, was inadvertently released into the Elk River, a municipal water source that serves about 300,000 people in the Charleston, WV area, resulting in temporary contamination of 15 percent of the state's tap water and causing significant dermal exposure. The current studies were undertaken to determine whether crude MCHM or MCHM has the potential to produce dermal irritancy and/or sensitization...
March 22, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28342830/patients-taking-amoxicillin-clavulanic-can-become-simultaneously-sensitized-to-both-drugs
#4
María Salas, Jose Julio Laguna, Inmaculada Doña, Esther Barrionuevo, Rubén Fernandez-Santamaría, Adriana Ariza, Ezequiel Perez-Inestrosa, Cristobalina Mayorga, Tahia Diana Fernández, María José Torres
BACKGROUND: Patients can react to amoxicillin (AX) and clavulanic acid (CLV) taken in combination because of selective reactions to either drug. However, scant information exists concerning patients who react simultaneously to both compounds. OBJECTIVE: To analyze the mechanisms involved in 4 patients who developed allergic reactions to AX-CLV administration (3 with immediate IgE-mediated reaction and 1 with nonimmediate T-cell-mediated reaction) and who responded specifically to both AX and CLV...
March 22, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28342387/isolation-and-characterization-of-a-novel-putative-human-polyomavirus
#5
Tarik Gheit, Sankhadeep Dutta, Javier Oliver, Alexis Robitaille, Shalaka Hampras, Jean-Damien Combes, Sandrine McKay-Chopin, Florence Le Calvez-Kelm, Neil Fenske, Basil Cherpelis, Anna R Giuliano, Silvia Franceschi, James McKay, Dana E Rollison, Massimo Tommasino
The small double-stranded DNA polyomaviruses (PyVs) form a family of 73 species, whose natural hosts are primarily mammals and birds. So far, 13 PyVs have been isolated in humans, and some of them have clearly been associated with several diseases, including cancer. In this study, we describe the isolation of a novel PyV in human skin using a sensitive degenerate PCR protocol combined with next-generation sequencing. The new virus, named Lyon IARC PyV (LIPyV), has a circular genome of 5269 nucleotides. Phylogenetic analyses showed that LIPyV is related to the raccoon PyV identified in neuroglial tumours in free-ranging raccoons...
March 22, 2017: Virology
https://www.readbyqxmd.com/read/28342106/extraction-of-skin-lesions-from-non-dermoscopic-images-for-surgical-excision-of-melanoma
#6
M Hossein Jafari, Ebrahim Nasr-Esfahani, Nader Karimi, S M Reza Soroushmehr, Shadrokh Samavi, Kayvan Najarian
PURPOSE: Computerized prescreening of suspicious moles and lesions for malignancy is of great importance for assessing the need and the priority of the removal surgery. Detection can be done by images captured by standard cameras, which are more preferable due to low cost and availability. One important step in computerized evaluation is accurate detection of lesion's region, i.e., segmentation of an image into two regions as lesion and normal skin. METHODS: In this paper, a new method based on deep neural networks is proposed for accurate extraction of a lesion region...
March 24, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28341821/salicylate-food-intolerance-and-aspirin-hypersensitivity-in-nasal-polyposis
#7
Hossein Esmaeilzedeh, Elmira Esmaeilzadeh, Mohammad Faramarzi, Mohammad Nabavi, Mohammad Farhadi
BACKGROUND: A clear association between allergy and nasal polyposis (NP) is not determined and the role of food intolerance in patients with NP is not investigated by oral food challenge (OFC). OBJECTIVE: To investigate the relation of salicylate food intolerance and atopy in patients with NP according to recurrence and aspirin sensitivity. METHODS: A cross sectional multicenter study was done in two tertiary centers for allergy in Iran. Adult patients with NP were selected for the study that had been referred to allergy clinics...
March 2017: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/28341191/-bacillus-cereus-endocarditis-and-a-probable-cutaneous-gateway
#8
S Soudet, C Becquart, F Dezoteux, K Faure, D Staumont-Salle, E Delaporte
BACKGROUND: Bacillus cereus is a ubiquitous telluric organism. B. cereus endocarditis is a rare condition seen mostly in prosthetic heart valves and among intravenous drug users. We report a new case of a patient without risk factors and with a good clinical outcome not requiring valve replacement. CASE REPORT: In October 2014, a 50-year-old woman was referred to the dermatology department of Lille University Hospital for lower-limb wounds developing 6 months earlier...
January 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28339492/a-preliminary-study-of-skin-ultrasound-in-diffuse-cutaneous-systemic-sclerosis-does-skin-echogenicity-matter
#9
He Liu, Yong Hou, Qing-Li Zhu, Dong Xu, Liang Wang, Jian-Chu Li, Yu-Xin Jiang, Qian Wang, Meng-Tao Li, Feng-Chun Zhang, Xiao-Feng Zeng
OBJECTIVE: To evaluate the usefulness of skin ultrasound and acoustic radiation force impulse (ARFI) quantification in diffuse cutaneous systemic sclerosis (dcSSc). PATIENTS AND METHODS: 28 patients with dcSSc, and 15 age gender matched normal controls were recruited. Skin echogenicity, thickness, and ARFI quantification were measured by ultrasound at 17 sites corresponding to the modified Rodnan skin score (mRSS) in each participant. Compared with controls, skin echogenicity of dcSSc patients was classified into isoechoic, hypoechoic, and hyperechoic...
2017: PloS One
https://www.readbyqxmd.com/read/28338958/molecular-cloning-and-characterization-of-antimicrobial-peptides-from-skin-of-hylarana-guentheri
#10
Zhu Dong, Wenjie Luo, Hengren Zhong, Manchuriga Wang, Yanting Song, Shiming Deng, Yingxia Zhang
The cDNAs encoding antimicrobial peptides (AMPs) in the skin of Hylarana guentheri were identified, namely temporin (five peptides, termed temporin-GHa-GHd and temporin-GUa), brevinin-1 (one peptide, brevinin-1GUb), and brevinin-2 (eight peptides, brevinin-2GHd-2GHj, and brevinin-2GHb). Eleven of the 14 peptides have novel primary structures. Synthesized temporin GHa-GHd have broad-spectrum antimicrobial activities against Gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis), Gram-negative bacteria (Escherichia coli, Vibrio alginolyticus, and Pseudomonas aeruginosa), as well as fungus (Candida albicans)...
March 18, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28338894/establishment-of-radiation-doses-for-pediatric-x-ray-examinations-in-a-large-pediatric-hospital-in-turkey
#11
T Olgar, T Sahmaran
Pediatric patients are more sensitive to ionizing radiation when compared with adults. The aim of this study was to evaluate the radiation doses for some common pediatric x-ray examinations performed with various digital radiography systems. Quality control tests of the digital radiography systems were carried out according to international published protocols before the pediatric dose measurements. Radiation dose measurement was performed by using the x-ray tube outputs and thermoluminescent dosimeter dose measurement methods...
February 25, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28338008/noninvasive-measurement-of-transdermal-drug-delivery-by-impedance-spectroscopy
#12
Pasquale Arpaia, Umberto Cesaro, Nicola Moccaldi
The effectiveness in transdermal delivery of skin permeation strategies (e.g., chemical enhancers, vesicular carrier systems, sonophoresis, iontophoresis, and electroporation) is poorly investigated outside of laboratory. In therapeutic application, the lack of recognized techniques for measuring the actually-released drug affects the scientific concept itself of dosage for topically- and transdermally-delivered drugs. Here we prove the suitability of impedance measurement for assessing the amount of drug penetrated into the skin after transdermal delivery...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337504/biotransformation-of-2-4-toluenediamine-in-human-skin-and-reconstructed-tissues
#13
Lisa Grohmann, Daniel Becker, Jörg Rademann, Nan Ma, Monika Schäfer-Korting, Günther Weindl
Reconstructed human epidermis (RHE) is used for risk assessment of chemicals and cosmetics and RHE as well as reconstructed human full-thickness skin (RHS) become important for e.g., the pre-clinical development of drugs. Yet, the knowledge regarding their biotransformation capacity is still limited, although the metabolic activity is highly relevant for skin sensitization, genotoxicity, and the efficacy of topical dermatics. The biotransformation of the aromatic amine 2,4-toluenediamine (2,4-TDA) has been compared in two commercially available RHS to normal human skin ex vivo, and in primary epidermal keratinocytes and dermal fibroblasts as well as in vitro generated epidermal Langerhans cells and dermal dendritic cells...
March 23, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28337457/screening-for-tuberculosis-in-health-care-workers-experience-in-an-italian-teaching-hospital
#14
Christian Napoli, Filippo Ferretti, Filippo Di Ninno, Riccardo Orioli, Alessandra Marani, Maria Giuditta Sarlo, Claudio Prestigiacomo, Assunta De Luca, Giovanni Battista Orsi
Health care workers (HCW) are particularly at risk of acquiring tuberculosis (TB), even in countries with low TB incidence. Therefore, TB screening in HCW is a useful prevention strategy in countries with both low and high TB incidence. Tuberculin skin test (TST) is widely used although it suffers of low specificity; on the contrary, the in vitro enzyme immunoassay tests (IGRA) show superior specificity and sensitivity but are more expensive. The present study reports the results of a three-year TB surveillance among HCW in a large teaching hospital in Rome, using TST (by standard Mantoux technique) and IGRA (by QuantiFERON-TB) as first- and second-level screening tests, respectively...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28335694/construction-of-three-dimensional-dermo-epidermal-skin-equivalents-using-cell-coating-technology-and-their-utilization-as-alternative-skin-for-permeation-studies-and-skin-irritation-tests
#15
Takami Akagi, Mayuka Nagura, Ayami Hiura, Hajime Kojima, Mitsuru Akashi
In vitro generated human skin equivalents are generating interest as promising tools in basic research, as alternatives to animal testing and for clinical applications in regenerative medicine. For prediction of skin irritation and corrosion, three-dimensional (3D) human skin equivalents consisting of differentiated human keratinocytes have been developed and some models have been internationally accepted. However, more delicate assessments using full-thickness skin models, such as skin sensitization tests cannot be performed because of the lack of a dermis containing fibroblasts or appendages...
March 23, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28335689/trends-of-occupational-hygiene-in-finland
#16
Rauno Pääkkönen, Milja Koponen
The aim of this work is to evaluate and describe the current status of, and prospects for, the future of occupational hygiene in Finland. The main sources of information include a seminar held in the annual meeting of Finnish Occupational Hygiene Society, and interviews with different stakeholders. Nanotechnology and other new materials, changing work environments, circular economy including green jobs, new medical methods, and advances of construction methods were recognised as future challenges. Future work opportunities for occupational hygiene experts included exposure assessments in indoor air surveys, private consulting and entrepreneurship in general, international activities, and product safety issues...
March 24, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28335476/inhibition-of-neoplastic-transformation-and-chemically-induced-skin-hyperplasia-in-mice-by-traditional-chinese-medicinal-formula-si-wu-tang
#17
Mandy M Liu, Kevin M Huang, Steven Yeung, Andy Chang, Suhui Zhang, Nan Mei, Cyrus Parsa, Robert Orlando, Ying Huang
Exploring traditional medicines may lead to the development of low-cost and non-toxic cancer preventive agents. Si-Wu-Tang (SWT), comprising the combination of four herbs, Rehmanniae, Angelica, Chuanxiong, and Paeoniae, is one of the most popular traditional Chinese medicines for women's diseases. In our previous studies, the antioxidant Nrf2 pathways were strongly induced by SWT in vitro and in vivo. Since Nrf2 activation has been associated with anticarcinogenic effects, the purpose of this study is to evaluate SWT's activity of cancer prevention...
March 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28334704/combining-real-time-cold-and-mama-pcr-taqman-techniques-to-detect-and-quantify-r201-gnas-mutations-in-the-mccune-albright-syndrome%C3%A2
#18
Luisa de Sanctis, Ilaria Galliano, Paola Montanari, Patrizia Matarazzo, Daniele Tessaris, Massimiliano Bergallo
BACKGROUND/AIM: The McCune-Albright syndrome (MAS) is a potentially severe disorder hallmarked by fibrous bone dysplasia, café-au-lait skin spots, and endocrine hyperfunction. It is caused by postzygotic activating mutations at the R201 codon of the GNAS gene, leading to a state of somatic mosaicism. Our aim was to improve the mutation detection rate and to quantify the presence of R201 GNAS mutations in different DNA samples from MAS patients. METHODS: Real-time COLD- and MAMA-PCR TaqMan techniques were combined to search for R201 mutations in the DNA of blood or affected tissues from 16 previously molecularly characterized MAS patients, from a further 84 subjects with MAS signs who were R201 negative at RFLP analysis, and from 36 controls...
March 23, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28333182/early-tuberculin-skin-test-for-the-diagnosis-of-latent-tuberculosis-infection-in-patients-with-inflammatory-bowel-disease
#19
Carlos Taxonera, Ángel Ponferrada, Fernando Bermejo, Sabino Riestra, Cristina Saro, María Dolores Martín-Arranz, José Luis Cabriada, Manuel Barreiro-de Acosta, María Luisa de Castro, Pilar López-Serrano, Jesús Barrio, Cristina Suarez, Eva Iglesias, Federico Argüelles-Arias, Isabel Ferrer, Ignacio Marín-Jiménez, Alejandro Hernández-Camba, Guillermo Bastida, Manuel Van Domselaar, Pilar Martínez-Montiel, David Olivares, Cristina Alba, Javier P Gisbert
Background and Aim: Sensitivity of tuberculin skin test [TST] during screening for latent tuberculosis infection [LTBI] is affected by steroid and/or immunosuppressant therapy. The aim of this study was to compare performance of the two-step TST in inflammatory bowel disease patients immediately before anti-tumour necrosis factor [TNF] therapy as part of routine screening for LTBI vs control patients when the TST was carried out at an early stage. Methods: In this multicentre prospective controlled study, we evaluated the performance of two-step TST with 5-mm threshold...
February 17, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28332823/from-dual-mode-triboelectric-nanogenerator-to-smart-tactile-sensor-a-multiplexing-design
#20
Tao Li, Jingdian Zou, Fei Xing, Meng Zhang, Xia Cao, Ning Wang, Zhong Lin Wang
Triboelectric nanogenerators (TENGs) can be applied for the next generation of artificial intelligent products, where skin-like tactile sensing advances the ability of robotics to feel and interpret environment. In this paper, a flexible and thin tactile sensor was developed on the basis of dual-mode TENGs. The effective transduction of touch and pressure stimulus into independent and interpretable electrical signals permits the instantaneous sensing of location and pressure with a plane resolution of 2 mm, a high-pressure-sensing sensitivity up to 28 mV·N(-1), and a linear pressure detection ranging from 40 to 140 N...
March 23, 2017: ACS Nano
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