Read by QxMD icon Read

Fractionated laser

Bernard Lavielle, Bertrand Thomas, Eric Gilabert, Gregory Canchel, Denis Horlait, Sylvain Topin, Fabien Pointurier, Christophe Moulin
A double focusing sector field mass filter used in Nier-Johnson geometry has been built in order to perform Kr isotope enrichment for (81) Kr and (85) Kr isotopes. The principle consists in implanting Kr(+) ions accelerated at 7 keV in Al foils after separation using the magnetic sector. A specific ion source has been designed capable of generating high Kr(+) ion beams (>0.5 μA) to transfer into the collecting Al foils in 3 to 5 h significant fractions of large Kr samples (10(15) to 10(16) atoms) initially introduced in the instrument...
October 2016: Journal of Mass Spectrometry: JMS
So Eun Park, Sang Seok Kim, Chul Woo Kim, Young Her
No abstract text is available yet for this article.
October 2016: Annals of Dermatology
Qian Li, Rui Liu, Tao Wu, Min Zhang
Six soluble dietary fiber (SDF) fractions were prepared via stepwise ethanol precipitation from natural and fermented wheat bran. The chemical composition, molecular weight distribution, glycosidic linkage and substitution pattern of the SDF fractions were elucidated by sugar analysis, periodate oxidation and Smith degradation, molecular determination, and 1H nuclear magnetic resonance (NMR) analysis. The impacts of SDF fractions on the rheological properties and morphologies of doughs were investigated by farinography, rheometry and scanning electron microscopy (SEM) to clarify the relationship between the microstructural features of SDF fractions and the macroscopic properties of SDF-containing doughs...
October 17, 2016: Journal of Agricultural and Food Chemistry
Alba Hykollari, Katharina Paschinger, Barbara Eckmair, Iain B H Wilson
N-glycans from invertebrates and protists have often unusual structures which present analytical challenges. Both core and antennal modifications can be quite different from the more familiar vertebrate glycan motifs; thereby, contrary to the concept that "simple" organisms have "simple" N-glycans, rather complex oligosaccharides structures, including zwitterionic and anionic ones, have been found in a range of species. Thus, to facilitate the optimized elucidation of the maximal possible range of structures, the analytical workflow for glycomics of these organisms should include sequential release and fractionation steps...
2017: Methods in Molecular Biology
K M Ratheesh, L K Seah, V M Murukeshan
The automatic calibration in Fourier-domain optical coherence tomography (FD-OCT) systems allows for high resolution imaging with precise depth ranging functionality in many complex imaging scenarios, such as microsurgery. However, the accuracy and speed of the existing automatic schemes are limited due to the functional approximations and iterative operations used in their procedures. In this paper, we present a new real-time automatic calibration scheme for swept source-based optical coherence tomography (SS-OCT) systems...
October 14, 2016: Physics in Medicine and Biology
Sarah Qureshi, Jennifer Y Lin
Aminolevulinic acid (ALA) photodynamic therapy (PDT) is an emerging modality in the treatment of acne. While ablative fractional lasers have been used to enhance drug delivery into the epidermis, recent evidence suggests that non-ablative fractional photothermolysis may also improve uptake of ALA. We explored the use of non-ablative 1550 nm laser as a safe alternative in the delivery of ALA prior to red-light PDT for refractory inflammatory and cystic acne. Subjects referred for treatment of acne refractory to several topical and oral regimens, including isotretinoin, were pre-treated with non-ablative fractional photothermolysis (NAFP)...
October 14, 2016: Lasers in Medical Science
Elia Marin, Alfredo Rondinella, Wenliang Zhu, Bryan J McEntire, B Sonny Bal, Giuseppe Pezzotti
The effect of frictional sliding on the surface degradation of commercially available zirconia-toughened alumina (ZTA) femoral heads was studied using a pin-on-ball wear tester under three different lubricating conditions: dry, water, and squalene. Water and squalene were employed under boundary lubrication regimes. Despite the unique (non-standard) character of this apparatus, standard loading conditions could be applied, which effectively determined dynamic friction coefficients as basic material properties...
September 28, 2016: Journal of the Mechanical Behavior of Biomedical Materials
Joachim Vater, Stefanie Herfort, Joerg Doellinger, Max Weydmann, Kristin Dietel, Sebastian Faetke, Peter Lasch
Paenibacillus polymyxa are rhizobacteria with a high potential to produce natural compounds of biotechnological and medical interest. Main products of P. polymyxa are fusaricidins, a large family of antifungal lipopeptides with a 15-guanidino-3-hydroxypentadecanoic acid (GHPD) as fatty acid side chain. We use the P. polymyxa strain M-1 as a model organism for the exploration of the biosynthetic potential of these rhizobacteria. Using matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) about 40 new fusaricidins were detected which were fractionated by reversed-phase (rp) HPLC...
October 6, 2016: Journal of Mass Spectrometry: JMS
William R Holmes, Adriana E Golding, William M Bement, Leah Edelstein-Keshet
Rho GTPases are regulatory proteins whose patterns on the surface of a cell affect cell polarization, cell motility and repair of single-cell wounds. The stereotypical patterns formed by two such proteins, Rho and Cdc42, around laser-injured frog oocytes permit experimental analysis of GTPase activation, inactivation, segregation and crosstalk. Here, we review the development and analysis of a spatial model of GTPase dynamics that describe the formation of concentric zones of Rho and Cdc42 activity around wounds, and describe how this model has provided insights into the roles of the GTPase effector molecules protein kinase C (PKCβ and PKCη) and guanosine nucleotide dissociation inhibitor (GDI) in the wound response...
October 6, 2016: Interface Focus
Andrea C Issler-Fisher, Oliver M Fisher, Ania O Smialkowski, Frank Li, Constant P van Schalkwyk, Peter Haertsch, Peter K M Maitz
BACKGROUND: The introduction of ablative fractional CO2 lasers (CO2-AFL) for burn scar management shows promising results. Whilst recent studies have focused on objective scar outcomes following CO2-AFL treatment, to date no data on patient subjective factors such as quality of life are available. METHODS: A prospective study was initiated to analyze the safety and efficacy of the CO2-AFL. Various objective and subjective outcome parameters were prospectively collected from the date of first consultation and follow-up following treatment...
October 1, 2016: Burns: Journal of the International Society for Burn Injuries
Blair M Goodridge, David L Valentine
Measurements of the isotopic composition of sulfate and sulfide have been essential to uncovering the microbial and geochemical processes that drive Earth's sulfur cycle. These processes routinely operate over submillimeter spatial scales in anaerobic environments, necessitating sulfur isotopic measurement techniques that can identify isotopic variability over equivalently small scales. Here we present a new method for small-scale (10(2) μm) measurements of δ(34)S using black and white photographic film sulfide capture coupled with δ(34)S determination using laser ablation multicollector inductively coupled plasma mass spectrometry...
October 5, 2016: Analytical Chemistry
Ningning Ma, Yao-Wen Jiang, Xiaodong Zhang, Hao Wu, John N Myers, Peidang Liu, Haizhen Jin, Ning Gu, Nongyue He, Fu-Gen Wu, Zhan Chen
Metallic nanostructures as excellent candidates for nanosensitizers have shown enormous potentials in cancer radiotherapy and photothermal therapy. Clinically, a relatively low and safe radiation dose is highly desired to avoid damage to normal tissues. Therefore, the synergistic effect of the low-dosed X-ray radiation and other therapeutic approaches (or so-called "combined therapeutic strategy") is needed. Herein, we have synthesized hollow and spike-like gold nanostructures by a facile galvanic replacement reaction...
October 14, 2016: ACS Applied Materials & Interfaces
Frederik Crop, David Pasquier, Amandine Baczkiewic, Julie Doré, Lena Bequet, Emeline Steux, Anne Gadroy, Jacqueline Bouillon, Clement Florence, Laurence Muszynski, Mathilde Lacour, Eric Lartigau
A surface imaging system, Catalyst (C-Rad), was compared with laser-based positioning and daily mega voltage computed tomography (MVCT) setup for breast patients with nodal involvement treated by helical TomoTherapy. Catalyst-based positioning performed better than laser-based positioning. The respective modalities resulted in a standard deviation (SD), 68% confidence interval (CI) of positioning of left-right, craniocaudal, anterior-posterior, roll: 2.4 mm, 2.7 mm, 2.4 mm, 0.9° for Catalyst positioning, and 6...
2016: Journal of Applied Clinical Medical Physics
Martin Flemmig, André Domsalla, Harshadrai Rawel, Matthias F Melzig
A protease called Mauritanicain was isolated from the latex of Euphorbia mauritanica L. (Euphorbiaceae) by combining ion exchange chromatography, ultrafiltration, and gel filtration chromatography. It has a high proteolytic activity against casein. The activity was only inhibited by specific serine protease inhibitors, classifying it to the serine protease family. An optimal degradation of the substrate casein takes place at a temperature of 55-65 °C and a pH of 5.5-6.5, and is unstable at pH < 5 and pH > 9...
September 28, 2016: Planta Medica
U Leone Roberti Maggiore, M Parma, M Candiani, S Salvatore
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
Apolinary Sobieszek
In early studies on smooth muscle, I described a crude myosin fraction (CMF) in which self-assembly of myosin filaments was observed. For the first time, the 14-nm periodicity stemming from regular arrangement of myosin heads on the filament surface was observed (Sobieszek in J Mol Biol 70:741-744, 1972). In this fraction, we also observed formation of long ribbon-shaped aggregates exhibiting a 5.6-nm periodicity, characteristic of tropomyosin (TM) paracrystals (Sobieszek and Small in Phil Trans R Soc Lond B 265:203-212, 1973)...
September 27, 2016: European Biophysics Journal: EBJ
Haiqing Yu, Joann J Lu, Wei Rao, Shaorong Liu
Density gradient centrifugation is widely utilized for various high purity sample preparations, and density gradient ultracentrifugation (DGU) is often used for more resolution-demanding purification of organelles and protein complexes. Accurately locating different isopycnic layers and precisely extracting solutions from these layers play a critical role in achieving high-resolution DGU separations. In this technique note, we develop a DGU procedure by freezing the solution rapidly (but gently) after centrifugation to fix the resolved layers and by slicing the frozen solution to fractionate the sample...
2016: Journal of Analytical Methods in Chemistry
Dariusz Świerad, Sebastian Häfner, Stefan Vogt, Bertrand Venon, David Holleville, Sébastien Bize, André Kulosa, Sebastian Bode, Yeshpal Singh, Kai Bongs, Ernst Maria Rasel, Jérôme Lodewyck, Rodolphe Le Targat, Christian Lisdat, Uwe Sterr
The increasing performance of optical lattice clocks has made them attractive for scientific applications in space and thus has pushed the development of their components including the interrogation lasers of the clock transitions towards being suitable for space, which amongst others requires making them more power efficient, radiation hardened, smaller, lighter as well as more mechanically stable. Here we present the development towards a space-compatible interrogation laser system for a strontium lattice clock constructed within the Space Optical Clock (SOC2) project where we have concentrated on mechanical rigidity and size...
September 26, 2016: Scientific Reports
Sameh Ben Khedir, Sana Bardaa, Naourez Chabchoub, Dorsaf Moalla, Zouheir Sahnoun, Tarek Rebai
CONTEXT: Since antiquity, Pistacia lentiscus L. (Anacardiaceae) fruit oil (PLFO) has been used as a remedy for primary health care such as burn treatment. OBJECTIVE: This study assesses the healing effect of PLFO on CO2 laser fractional burn in a rat model. MATERIALS AND METHODS: The study was carried out on 18 adult male Wistar rats. A second-degree laser burn (wound area = 2.2 cm(2)) was inflicted in the dorsal region by the application of CO2 fractional laser within the following parameters; Energy level: 25 MJ and Depth level: 4...
September 23, 2016: Pharmaceutical Biology
Wei Zhu, Chunze Yan, Yunsong Shi, Shifeng Wen, Jie Liu, Qingsong Wei, Yusheng Shi
A novel method based on selective laser sintering (SLS) process is proposed for the first time to prepare complex and high-performance carbon fibres/polyamide12/epoxy (CF/PA12/EP) ternary composites. The procedures are briefly described as follows: prepare polyamide12 (PA12) coated carbon fibre (CF) composite powder; build porous green parts by SLS; infiltrate the green parts with high-performance thermosetting epoxy (EP) resin; and finally cure the resin at high temperature. The obtained composites are a ternary composite system consisting of the matrix of novolac EP resin, the reinforcement of CFs and the transition thin layer of PA12 with a thickness of 595 nm...
2016: Scientific Reports
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"