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https://www.readbyqxmd.com/read/28415511/facile-synthesis-and-characterization-of-novel-rapid-setting-spherical-sub-micron-bioactive-glasses-cements-and-their-biocompatibility-in-vitro
#1
Yuli Li, Qiming Liang, Cai Lin, Xian Li, Xiaofeng Chen, Qing Hu
Dental pulp vitality is extremely important for the tooth viability, since it provides nutrition and forms the dentin. Bioactive glasses (BGs) may be promising materials for pulp repair due to their excellent abilities of rapidly bonding to bone and stimulating new bone growth. However, the unsatisfied handling property, low plasticity, and poor rapid-setting property of traditional BGs limit its application in vital pulp therapy. Spherical bioactive glasses (SBGs) exhibited higher osteogenesis and odontogenic differentiation than irregular BGs...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28405805/a-rotating-cerium-anode-x-ray-system-allows-visualization-of-intramural-coronary-vessels-after-cardiac-stem-cell-therapy-for-myocardial-infarction
#2
Chiharu Tanaka, Toru Hosoda, Yoshimori Ikeya, Yoshiro Shinozaki, Kikue Todoroki, Toru Shizuma, Takashi Shiraishi, Naoto Fukuyama, Toshihiko Ueda, Hidezo Mori
Conventional angiography is insufficient for evaluating the therapeutic effect of cardiac regeneration therapy. A microangiographic X-ray system using a cerium anode was developed. Cerium has a characteristic X-ray with a peak at 34.6 keV, which allows visualization of tiny amounts of iodine. The performance of the cerium anode X-ray system was evaluated in two excised normal canine hearts and in excised ischemic canine hearts treated with c-kit-positive cardiac stem cells (5 canines) or without cells (5 control canines)...
April 12, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28401733/effects-of-metals-cadmium-and-chromium-alone-and-in-combination-on-the-liver-and-kidney-tissue-of-male-spraque-dawley-rats-an-ultrastructural-and-electron-energy-loss-spectroscopy-investigation
#3
Chantelle Venter, Hester Magdalena Oberholzer, Franscious Riccardo Cummings, Megan Jean Bester
Heavy metal pollution has increased in the last decades. Water sources are contaminated and human exposure is often long term exposure to variable amounts of different metals. In this study, male Sprague-Dawley rats were exposed via oral gavage for 28 days to cadmium (Cd) and chromium (Cr), alone and in combination at concentrations 1000 times the human World Health Organization's acceptable water limits. Rat equivalent dosages were used. Blood markers of liver and kidney function were measured, changes to cellular morphology was determined with transmission electron microscopy and the intracellular metal localisation was determined with the electron energy-loss spectroscopy and energy filtered transmission electron microscopy analysis...
April 12, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28376906/braf-v600e-expression-in-histiocytic-sarcoma-associated-with-splenic-marginal-zone-lymphoma-a-case-report
#4
John L Vaughn, C Eric Freitag, Jessica A Hemminger, Jeffrey A Jones
BACKGROUND: Histiocytic sarcoma is a rare histiocytic neoplasm of unknown etiology that constitutes less than 1% of hematologic malignancies. A few cases of histiocytic sarcoma harboring the BRAF (V600E) mutation have been reported, but this finding has not been confirmed in all studies. CASE PRESENTATION: We report the case of a 63-year-old white woman with a history of splenic marginal zone lymphoma who presented with 2 weeks of right-sided neck swelling. Positron emission tomography revealed an intensely hypermetabolic and destructive soft tissue mass in her right skull base...
April 5, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28363786/non-invasive-monitoring-of-in-vivo-degradation-of-a-radiopaque-thermoreversible-hydrogel-and-its-efficacy-in-preventing-post-operative-adhesions
#5
Kewen Lei, Yipei Chen, Jinyao Wang, Xiaochun Peng, Lin Yu, Jiandong Ding
In vivo behavior of hydrogel-based biomaterials is very important for rational design of hydrogels for various biomedical applications. Herein, we developed a facile method for in situ fabrication of radiopaque hydrogel. An iodinated functional diblock copolymer of poly(ethylene glycol) and aliphatic polyester was first synthesized by coupling the hydroxyl end of the diblock copolymer with 2, 3, 5-triiodobenzoic acid (TIB) and then a radiopaque thermoreversible hydrogel was obtained by mixing it with the virgin diblock copolymer...
March 28, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28356712/a-protocol-for-topographic-guided-corneal-repair-utilizing-the-us-food-and-drug-administration-approved-wavelight-contoura
#6
Manoj Motwani
PURPOSE: To demonstrate how Wavelight Contoura can be used to repair corneas damaged by trauma and prior poor surgical outcomes. METHODS: Four representative eyes are presented that show different scenarios in which highly irregular corneas can be corrected with Wavelight Contoura using a protocol (named the San Diego Protocol) designed to use the information in Contoura processing. Both laser-assisted in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK) were used...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28343229/cytological-findings-of-ascitic-fluid-with-a-malignant-ovarian-steroid-cell-tumor-a-case-report-and-literature-review
#7
Nobuaki Kosaka, Kiyoshi Hasegawa, Kaori Kiuchi, Shoko Ochiai, Tamiko Nagai, Hiromi Machida, Yasuo Imai, Ichio Fukasawa
BACKGROUND: Ovarian steroid cell tumors (SCTs) are rare and usually benign, although 25-43% are reportedly malignant. The cytologic findings of these rare ovarian tumors have almost never been reported. CASE: We report a rare case of a malignant ovarian SCT with peritoneal dissemination and malignant ascites in a 40-year-old woman. Her tumor was classified as stage IIB (pT2bNoM0) according to the FIGO (International Federation of Gynecology and Obstetrics) classification system, and she was treated with adjuvant chemotherapy following staging laparotomy...
March 25, 2017: Acta Cytologica
https://www.readbyqxmd.com/read/28335461/design-and-validation-of-a-low-cost-portable-device-to-quantify-postural-stability
#8
Yong Zhu
Measurement of the displacement of the center-of-pressure (COP) is an important tool used in biomechanics to assess postural stability and human balance. The goal of this research was to design and validate a low-cost portable device that can offer a quick indication of the state of postural stability and human balance related conditions. Approximate entropy (ApEn) values reflecting the amount of irregularity hiding in COP oscillations were used to calculate the index. The prototype adopted a portable design using the measurements of the load cells located at the four corners of a low-cost force platform...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28334646/defluoridation-of-drinking-water-using-a-new-flow-column-electrocoagulation-reactor-fcer-experimental-statistical-and-economic-approach
#9
Khalid S Hashim, Andy Shaw, Rafid Al Khaddar, Montserrat Ortoneda Pedrola, David Phipps
A new batch, flow column electrocoagulation reactor (FCER) that utilises a perforated plate flow column as a mixer has been used to remove fluoride from drinking water. A comprehensive study has been carried out to assess its performance. The efficiency of fluoride removal (R%) as a function of key operational parameters such as initial pH, detention time (t), current density (CD), inter-electrode distance (ID) and initial concentration (C0) has been examined and an empirical model has been developed. A scanning electron microscopy (SEM) investigation of the influence of the EC process on morphology of the surface of the aluminium electrodes, showed the erosion caused by aluminium loss...
March 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28318414/the-prevalence-of-self-reported-premenstrual-symptoms-and-evaluation-of-regular-exercise-with-premenstrual-symptoms-among-female-employees-in-taiwan
#10
Su-Ying Tsai, Fu-Chen Kuo, Hsin-Chih Kuo, Li-Ling Liao
Few studies have focused on premenstrual symptoms in employees. This study explored the prevalence of premenstrual symptoms in 7,193 female employees aged 18-55 years in a large electronics manufacturer in Taiwan from August 2014 to December 2014 and examined whether regular exercise was associated with premenstrual symptoms. Information was collected on demographics, lifestyle, menstrual history, menstrual pain, and premenstrual symptoms. Half of the participants reported irregular menstruation; 79.4% reported a moderate menstruation amount, and half reported little impact of menstrual pain at work...
March 20, 2017: Women & Health
https://www.readbyqxmd.com/read/28287728/characterization-of-biomolecular-helices-and-their-complementarity-using-geometric-analysis
#11
Kevin Hauser, Yiqing He, Miguel Garcia-Diaz, Carlos Simmerling, Evangelos Coutsias
A general method is presented to characterize the helical properties of potentially irregular helices, such as those found in protein secondary and tertiary structures and nucleic acids. The method was validated using artificial helices with varying numbers of points, points per helical turn, pitch, and radius. The sensitivity of the method was validated by applying increasing amounts of random perturbation to the coordinates of these helices; 399 360 helices in total were evaluated. In addition, the helical parameters of protein secondary structure elements and nucleic acid helices were analyzed...
April 24, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28254297/a-novel-chitosan-hydrogel-membrane-by-an-improved-electrophoretic-deposition-and-its-characteristics-in-vitro-and-in-vivo
#12
Wen-Wen Li, Hai-Yan Wang, Yu-Qing Zhang
Here, we report a novel chitosan hydrogel membrane (CHM) created by an improved electrophoretic deposition. Unlike a traditional CHM by electrophoretic deposition, the CHM was formed on a nanoporous film as a barrier using a homemade device at a high DC voltage (60 VDC). The CHM maximum recovery of 81.7% could be achieved after 1h of electrophoretic deposition. The transparent CHM with an elongation of 42.46% and swelling index of 538.86% was a mixture of type I and type II crystal structures. SEM revealed that the CHM had an irregular net structure...
May 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28241535/speckle-reduction-in-laser-projection-using-microlens-array-screens
#13
Jaël Pauwels, Guy Verschaffelt
We report on a novel speckle reduction scheme using microlens arrays as screen material for application in laser-based projection systems. The scheme is based on properly adjusting the coherence properties on the screen: when the coherence area on the microlens-array screen is smaller than the microlens footprint, there is no interference between the fields emitted by the different microlenses and as a result no speckle is formed. We measured and modelled the speckle properties of microlens arrays with regular and irregular structure and lens sizes, and also a paper screen for comparison...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28223552/ca-mg-zn-co3-and-ca-mg-co3-tri-and-bi-elemental-carbonate-microparticles-for-novel-injectable-self-gelling-hydrogel-microparticle-composites-for-tissue-regeneration
#14
Timothy E L Douglas, Katarzyna Sobczyk, Agata Łapa, Katarzyna Włodarczyk, Gilles Brackman, Irina Vidiasheva, Katarzyna Reczyńska, Krzysztof Pietryga, David Schaubroeck, Vitaliy Bliznuk, Pascal Van Der Voort, Heidi A Declercq, Jan Van den Bulcke, Sangram Keshari Samal, Dmitry Khalenkow, Bogdan V Parakhonskiy, Joris Van Acker, Tom Coenye, Małgorzata Lewandowska-Szumieł, Elżbieta Pamuła, Andre G Skirtach
Injectable composites for tissue regeneration can be developed by dispersion of inorganic microparticles and cells in a hydrogel phase. In this study, multifunctional carbonate microparticles containing different amounts of calcium, magnesium and zinc were mixed with solutions of gellan gum (GG), an anionic polysaccharide, to form injectable hydrogel-microparticle composites, containing Zn, Ca and Mg. Zn and Ca were incorporated into microparticle preparations to a greater extent than Mg. Microparticle groups were heterogeneous and contained microparticles of differing shape and elemental composition...
March 24, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28191698/short-and-long-term-complications-and-the-impact-on-quality-of-life-after-cervical-conization-by-harmonic-scalpel
#15
Megumi Furugori, Mikiko Asai-Sato, Kayoko Katayama, Fumiki Hirahara, Etsuko Miyagi
AIM: The incidence of non-obstetrical complications after cervical conization is low, and women receive minimal postsurgical attention. In this study, we investigated whether women felt any discomfort after undergoing conization by harmonic scalpel, one of the hot-knife devices widely used in Japan. METHODS: Eighty-eight women aged 20-47 years who were still experiencing menstrual cycles and had undergone harmonic conization participated in a questionnaire survey regarding perisurgical complications and postsurgical changes in gynecological issues...
February 13, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28180226/facile-fabrication-of-sudan-red-particle-microcapsules-by-a-polymerizable-gemini-surfactant-and-molecular-assembly-mechanisms
#16
Yaqian Wu, Haike Yan, Xuefeng Shi, Jinben Wang
An efficient method was developed to encapsulate water insoluble organic particles of Sudan red III (SR) in aqueous suspensions by using a polymerizable cationic gemini surfactant, 1,3-bis(N,N-dimethyl-N-cetylammonium)-2-(propylacrylate dibromide) (AGC16). The AGC16 coated SR microcapsules (AGC16@SR) were prepared by absorption of AGC16 on the surface of SR, followed by in situ homopolymerization (PAGC16). Several measurements, including transmission and scanning electron microscopy, isothermal titration calorimetry, zeta potential, electron paramagnetic resonance and small angle X-ray scattering, were performed to determine the adsorption amount of AGC16, and the layer structures and the molecular assembly mechanism in the AGC16@SR and PAGC16@SR systems, respectively...
February 9, 2017: Soft Matter
https://www.readbyqxmd.com/read/28178220/a-signal-processing-approach-with-a-smooth-empirical-mode-decomposition-to-reveal-hidden-trace-of-corrosion-in-highly-contaminated-guided-wave-signals-for-concrete-covered-pipes
#17
Javad Rostami, Jingming Chen, Peter W Tse
Ultrasonic guided waves have been extensively applied for non-destructive testing of plate-like structures particularly pipes in past two decades. In this regard, if a structure has a simple geometry, obtained guided waves' signals are easy to explain. However, any small degree of complexity in the geometry such as contacting with other materials may cause an extra amount of complication in the interpretation of guided wave signals. The problem deepens if defects have irregular shapes such as natural corrosion...
February 7, 2017: Sensors
https://www.readbyqxmd.com/read/28176614/acanthomatous-ameloblastoma-with-atypical-foci-in-five-dogs
#18
Jennifer L Malmberg, Elizabeth W Howerth, Barb E Powers, Paula A Schaffer
Acanthomatous ameloblastoma is a common, locally invasive, nonmetastasizing tumor of the canine oral cavity. The long-term prognosis for canine acanthomatous ameloblastoma is good if complete excision can be achieved, usually by maxillectomy or mandibulectomy. A variant of acanthomatous ameloblastoma with atypical foci was noted in 5 dogs. There was no age, breed, or sex predisposition. Atypical cells were pleomorphic with a high mitotic rate. They were immunohistochemically negative for cytokeratin, vimentin, melan A, PNL2, CD3, Pax5, CD18, chromogranin A, and synaptophysin...
January 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28169261/comparative-evaluation-of-tooth-substance-loss-and-its-correlation-with-the-abrasivity-and-chemical-composition-of-different-dentifrices
#19
Ram Prakash Singh, Sidhartha Sharma, Ajay Logani, Naseem Shah, Surendra Singh
CONTEXT: In India, teeth cleaning with tooth powder is common in rural and semi-urban areas. These dentifrices may contain low-quality abrasives, which may have a deleterious effect on dental hard tissues. AIMS: This study aims to evaluate the tooth substance loss caused by different dentifrices and to correlate it with chemical composition, size, and shape of abrasives used. SETTINGS AND DESIGN: An indigenously made automated machine was used for brushing the specimens...
November 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28161991/stabilizing-ability-of-surfactant-on-physicochemical-properties-of-drug-nanoparticles-generated-from-solid-dispersions
#20
Thanu Thongnopkoon, Satit Puttipipatkhachorn
This study was aimed to examine the nanoparticle formation from redispersion of binary and ternary solid dispersions. Binary systems composed of various ratios of glibenclamide (GBM) and polyvinylpyrrolidone K30 (PVP-K30), whereas a constant amount at 2.5%w/w of a surfactant, sodium lauryl sulfate (SLS) or Gelucire44/14 (GLC), was added to create ternary systems. GBM nanoparticles were collected after the systems were dispersed in water for 15 minutes. The obtained nanoparticles were characterized for size distribution, crystallinity, thermal behavior, molecular structure, and dissolution properties...
February 6, 2017: Drug Development and Industrial Pharmacy
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