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https://www.readbyqxmd.com/read/28211711/impact-of-laser-beam-speckle-structure-on-crossed-beam-energy-transfer-via-beam-deflections-and-ponderomotive-self-focusing
#1
G Raj, S Hüller
The role of laser speckle structure (hot spots) and its ponderomotive self-focusing (PSF), in crossed beam energy transfer (CBET), of smoothed laser beams is investigated in an inhomogeneous expanding plasma. Numerical simulations using the code harmony in two spatial dimensions, demonstrate how self-focusing of laser hot spots in crossed beams can significantly affect the transfer of energy from one beam to the other in addition to the stimulated Brillouin scattering (SBS) process. It is shown that for sufficiently intense laser beams, when the laser hot spots exceed the criterion for self-focusing in a plasma with flow, the angular spread of transmitted light beams increases considerably with the intensity, which arises in particular, in expanding plasma where significant beam deflection is observed...
February 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28204988/outcome-of-solid-state-532%C3%A2-nm-green-laser-in-high-risk-retinopathy-of-prematurity-at-a-tertiary-care-centre-in-india
#2
Kanika Chhabra, Prempal Kaur, Karamjit Singh, Anand Aggarwal, Dharamvir Chalia
PURPOSE: The purpose of this study was to analyse the outcome of solid-state green laser in high-risk retinopathy of prematurity (ROP) at a tertiary centre in India. METHODS: Fifty-nine eyes of 30 infants with high-risk ROP were recruited in this prospective, interventional study. High-risk ROP included prethreshold type 1 ROP and APROP. Laser photocoagulation was performed with 532 nm solid-state green laser (Novus Spectra, Lumenis, GmbH, Germany). RESULTS: Of the 30 infants, 18 were males (60%) and 12 were females (40%)...
February 15, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28196193/bruch-membrane-breaks-independent-of-laser-spots-following-photocoagulation-for-retinopathy-of-prematurity
#3
Abdul-Jabbar Ghauri, Mariam Al-Feky, Olga Kapellou, Himanshu I Patel, Gillian G W Adams
No abstract text is available yet for this article.
February 9, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28194954/gecko-inspired-nanotentacle-surface-enhanced-raman-spectroscopy-substrate-for-sampling-and-reliable-detection-of-pesticide-residues-in-fruits-and-vegetables
#4
Pan Wang, Long Wu, Zhicheng Lu, Qin Li, Wenmin Yin, Fan Ding, Heyou Han
Rapid sampling and multicomponent detection are crucial for monitoring of pesticide residues analysis. Here, a gecko-inspired nanotentacle surface-enhanced Raman spectroscopy (G-SERS) platform is proposed for the first time for the simultaneous detection of three kinds of pesticides via a simple and intuitive "press and peeled-off" approach. The G-SERS platform obtained from seeding deposition of silver nanoparticles (Ag NPs) on 3D PDMS nanotentacle array is flexible and free-standing. Compared with other substrates, this G-SERS substrate can simultaneously provide outstanding SERS activity (enhancement factor = 1...
February 6, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28193074/cobalamin-concentrations-in-fetal-liver-show-gender-differences-a-result-from-using-a-high-pressure-liquid-chromatography-inductively-coupled-plasma-mass-spectrometry-as-an-ultratrace-cobalt-speciation-method
#5
Janine Bosle, Sven Goetz, Andrea Raab, Eva M Krupp, Kirk G Scheckel, Enzo Lombi, Andrew A Meharg, Paul A Fowler, Jörg Feldmann
Maternal diet and lifestyle choices may affect placental transfer of cobalamin (Cbl) to the fetus. Fetal liver concentration of Cbl reflects nutritional status with regards to vitamin B12, but at these low concentration current Cbl measurement methods lack robustness. An analytical method based on enzymatic extraction with subsequent reversed-phase-high-pressure liquid chromatography (RP-HPLC) separation and parallel ICPMS and electrospray ionization (ESI)-Orbitrap-MS to determine specifically Cbl species in liver samples of only 10-50 mg was developed using 14 pig livers...
December 20, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/28192948/c3n4-nanosheet-modified-microwell-array-with-enhanced-electrochemiluminescence-for-total-analysis-of-cholesterol-at-single-cells
#6
Jingjing Xu, Depeng Jiang, Yanling Qin, Juan Xia, Dechen Jiang, Hong-Yuan Chen
Here, a g-C3N4 nanosheet modified microwell array providing enhanced electrochemiluminescence (ECL) and better visible sensitivity was prepared to simultaneously analyze total (membrane and intracellular) cholesterol at single cells. The detection limit for ECL visualization of hydrogen peroxide at microwell array was improved to be 500 nM that guaranteed the detection of low concentration cholesterol at single cells in parallel. To achieve single cell cholesterol analysis, the individual cells cultured at the microwell array were exposed to cholesterol oxidase generating hydrogen peroxide for luminescence analysis of membrane cholesterol, and then treated with triton X-100, cholesterol esterase, and cholesterol oxidase to produce hydrogen peroxide from intracellular cholesterol for luminescence determination...
February 9, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28191378/mediterranean-spotted-fever-a-rare-non-endemic-disease-in-the-usa
#7
Joshua Brad Oaks, Glenmore Lasam, Gina LaCapra
We report a case of a 43-year-old Israeli male who presented with an intermittent fever associated with a gradual appearance of diffusely scattered erythematous non-pruritic maculopapular lesions, generalized body malaise, muscle aches, and distal extremity weakness. He works in the Israeli military and has been exposed to dogs that are used to search for people in tunnels and claimed that he had removed ticks from the dogs. In the hospital, he presented with fever, a diffuse maculopapular rash, and an isolated round black eschar...
January 12, 2017: Curēus
https://www.readbyqxmd.com/read/28185603/outbreak-investigation-of-fever-mimicking-dengue-in-havelock-island-an-important-tourist-destination-in-the-andaman-nicobar-archipelago-2014
#8
C Kartick, G S J Bharathi, P Surya, M Anwesh, S Arun, N Muruganandam, R Avijit, P Vijayachari
An upsurge of fever cases of unknown origin, but resembling dengue and leptospirosis was reported in Havelock, Andaman & Nicobar Islands, an important tourism spot, during May 2014. Investigations were carried out to determine the aetiology, and to describe the epidemiology of the outbreak. The data on fever cases attending Primary Health Centre (PHC), Havelock showed that the average number of cases reporting per week over the last 2 years was 46·1 (95% confidence interval 19·4-72·9). A total of 27 (43·5%) patients out of the 62 suspected cases were diagnosed as having DENV infection based on a positive enzyme immunoassay or reverse transcriptase-polymerase chain reaction...
February 10, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28179898/metatranscriptomic-analysis-reveals-unexpectedly-diverse-microbial-metabolism-in-a-biogeochemical-hot-spot-in-an-alluvial-aquifer
#9
Talia N M Jewell, Ulas Karaoz, Markus Bill, Romy Chakraborty, Eoin L Brodie, Kenneth H Williams, Harry R Beller
Organic matter deposits in alluvial aquifers have been shown to result in the formation of naturally reduced zones (NRZs), which can modulate aquifer redox status and influence the speciation and mobility of metals, affecting groundwater geochemistry. In this study, we sought to better understand how natural organic matter fuels microbial communities within anoxic biogeochemical hot spots (NRZs) in a shallow alluvial aquifer at the Rifle (CO) site. We conducted a 20-day microcosm experiment in which NRZ sediments, which were enriched in buried woody plant material, served as the sole source of electron donors and microorganisms...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28174312/selective-whole-genome-amplification-is-a-robust-method-that-enables-scalable-whole-genome-sequencing-of-plasmodium-vivax-from-unprocessed-clinical-samples
#10
Annie N Cowell, Dorothy E Loy, Sesh A Sundararaman, Hugo Valdivia, Kathleen Fisch, Andres G Lescano, G Christian Baldeviano, Salomon Durand, Vince Gerbasi, Colin J Sutherland, Debbie Nolder, Joseph M Vinetz, Beatrice H Hahn, Elizabeth A Winzeler
: Whole-genome sequencing (WGS) of microbial pathogens from clinical samples is a highly sensitive tool used to gain a deeper understanding of the biology, epidemiology, and drug resistance mechanisms of many infections. However, WGS of organisms which exhibit low densities in their hosts is challenging due to high levels of host genomic DNA (gDNA), which leads to very low coverage of the microbial genome. WGS of Plasmodium vivax, the most widely distributed form of malaria, is especially difficult because of low parasite densities and the lack of an ex vivo culture system...
February 7, 2017: MBio
https://www.readbyqxmd.com/read/28173805/serum-proteomic-profiles-in-ckcs-with-mitral-valve-disease
#11
Chiara Locatelli, Cristian Piras, Giulia Riscazzi, Isabella Alloggio, Ilaria Spalla, Alessio Soggiu, Viviana Greco, Luigi Bonizzi, Paola Roncada, Paola G Brambilla
BACKGROUND: Myxomatous mitral valve disease (MVD) is the most common acquired heart disease in dogs, and the Cavalier King Charles Spaniel (CKCS) is the most studied breed because of the high prevalence, early onset and hereditary component evidenced in the breed. MVD has different severity levels, and there are many practical limitations in identifying its asymptomatic stages. Proteomic techniques are valuable for studying the proteins and peptides involved in cardiovascular diseases, including the period prior to the clinical onset of the disease...
February 7, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28172740/p686-application-of-dried-blood-spots-for-pharmacokinetic-profiling-of-golimumab-treated-patients-with-ulcerative-colitis
#12
I Detrez, V Ballet, G Van Assche, S Vermeire, M Ferrante, A Gils
No abstract text is available yet for this article.
February 1, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28169507/predictive-factors-for-fatal-tick-borne-spotted-fever-in-brazil
#13
S V de Oliveira, M C A Willemann, G S Gazeta, R N Angerami, R Gurgel-Gonçalves
In Brazil, two pathogenic Rickettsia species have been identified causing tick-borne spotted fever (SF). The aetiological agent Rickettsia rickettsii causes serious illness, particularly in the south-eastern region of the country. Moreover, the Rickettsia sp. strain Atlantic Rainforest cause milder clinical manifestations in south-eastern, south and north-east regions. This study has sought to analyse predictive factors for fatal SF. A case-control study was performed using disease notification records in Brazil...
February 7, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28167893/morphogenetic-alterations-of-alternaria-alternata-exposed-to-dicarboximide-fungicide-iprodione
#14
Eunji Kim, Hye Min Lee, Young Ho Kim
Fungicide-resistant Alternaria alternata impede the practical control of the Alternaria diseases in crop fields. This study aimed to investigate cytological fungicide resistance mechanisms of A. alternata against dicarboximide fungicide iprodione. A. alternata isolated from cactus brown spot was cultured on potato-dextrose agar (PDA) with or without iprodione, and the fungal cultures with different growth characteristics from no, initial and full growth were observed by light and electron microscopy. Mycelia began to grow from one day after incubation (DAI) and continued to be in full growth (control-growth, Con-G) on PDA without fungicide, while on PDA with iprodione, no fungal growth (iprodione-no growth, Ipr-N) occurred for the first 3 DAI, but once the initial growth (iprodione-initial growth, Ipr-I) began at 4-5 DAI, the colonies grew and expanded continuously to be in full growth (iprodione-growth, Ipr-G), suggesting Ipr-I may be a turning moment of the morphogenetic changes resisting fungicidal toxicity...
February 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28166967/embryonic-development-of-the-grass-pufferfish-takifugu-niphobles-from-egg-to-larvae
#15
V Gallego, M Yoshida, D Kurokawa, J F Asturiano, G J Fraser
Tetraodontidae (pufferfish) family members carry the smallest genomes among vertebrates, and these pocket-sized genomes have directly contributed to our understanding of the structure and evolution of higher animals. The grass pufferfish (Takifugu niphobles) could be considered a potential new model organism for comparative genomics and development due to the potential access to embryos, and availability of sequence data for two similar genomes: that of spotted green pufferfish (Tetraodon nigroviridis) and Fugu (Takifugu rubripes)...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28164415/e-coli-contamination-of-child-complementary-foods-and-association-with-domestic-hygiene-in-rural-bangladesh
#16
Sarker Masud Parvez, Laura Kwong, Musarrat Jabeen Rahman, Ayse Ercumen, Amy J Pickering, Probir K Ghosh, Md Zahidur Rahman, Kishor Kumar Das, Stephen P Luby, Leanne Unicomb
OBJECTIVE: To determine the frequency and concentration of E. coli in child complementary food and its association with domestic hygiene practices in rural Bangladesh. METHOD: 608 households with children <2 years were enrolled. We collected stored complementary food samples, performed spot checks on domestic hygiene and measured ambient temperature in the food storage area. Food samples were analyzed using the IDEXX most probable number (MPN) method with Colilert-18 media to enumerate E...
February 6, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28163183/a-femoral-common-vein-aneurysm-in-a-patient-with-neurofibromatosis-syndrome-type-1
#17
C Seinturier, S Blaise, F Thony, J L Magne, G Pernod
Neurofibromatosis type I (NFI), also called Von Recklinghausen disease, is an autosomal dominant disease secondary to a genetic mutation on the long arm of chromosome 17. This disorder affects neural crest cells. Cutaneous clinical forms are the most frequent with multiple benign skin neurofibromas, associated with café au lait skin spots and iris hamartomas. Vascular abnormalities in NF1 are rare but have also been well described. The most frequent abnormalities are characterized by arterial aneurysm degeneration, stenosis, and malformations...
February 2, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28161147/factors-associated-with-worsening-proliferative-diabetic-retinopathy-in-eyes-treated-with-panretinal-photocoagulation-or-ranibizumab
#18
Susan B Bressler, Wesley T Beaulieu, Adam R Glassman, Jeffrey G Gross, Lee M Jampol, Michele Melia, Mark A Peters, Michael E Rauser
PURPOSE: To compare rates and identify predictive factors for events that represent worsening of proliferative diabetic retinopathy (PDR) in eyes treated with panretinal photocoagulation (PRP) or ranibizumab. DESIGN: Randomized clinical trial (55 United States sites). PARTICIPANTS: Three hundred ninety-four study eyes from 305 adults with PDR, visual acuity (VA) 20/320 or better, and no history of PRP. INTERVENTION: Panretinal photocoagulation or intravitreous ranibizumab injections (0...
February 1, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28160420/assessment-of-skin-pigmentation-by-confocal-microscopy-influence-of-solar-exposure-and-protection-habits-on-cutaneous-hyperchromias
#19
Ana Paula M Martini, Daiane G Mercurio, Patrícia M B G Maia Campos
BACKGROUND: Cutaneous hyperchromias are disorders of skin pigmentation involving an increase of melanin production and its irregular accumulation in skin cells. It is known that the use of sunscreens helps to prevent changes in the skin pigmentation pattern, but the structural and morphological alterations that occur in the different types of hyperpigmentations need better elucidation. OBJECTIVE: To assess the influence of solar exposure and protection habits on the pattern of skin pigmentation using reflectance confocal microscopy (RCM)...
February 3, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28154413/diffraction-free-light-droplets-for-axially-resolved-volume-imaging
#20
G Antonacci, G Di Domenico, S Silvestri, E DelRe, G Ruocco
An ideal direct imaging system entails a method to illuminate on command a single diffraction-limited region in a generally thick and turbid volume. The best approximation to this is the use of large-aperture lenses that focus light into a spot. This strategy fails for regions that are embedded deep into the sample, where diffraction and scattering prevail. Airy beams and Bessel beams are solutions of the Helmholtz Equation that are both non-diffracting and self-healing, features that make them naturally able to outdo the effects of distance into the volume but intrinsically do not allow resolution along the propagation axis...
December 2017: Scientific Reports
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