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https://www.readbyqxmd.com/read/28538747/a-retrospective-review-of-light-and-laser-based-management-of-hidradenitis-suppurativa
#1
Melissa A Levoska, Cynthia L Nicholson, Iltefat H Hamzavi
Hidradenitis suppurativa (HS) is a chronic skin disease that is difficult to manage and often refractory to medical management. Light and laser therapies have been utilized in the field of dermatology to treat a variety of skin conditions, but more recently were studied in the management of HS. Usually performed as outpatient procedures with a low risk of complications, they offer several advantages to traditional cold knife surgical procedures. We reviewed the various light- and laser-based treatments studied in HS and compared their efficacy...
June 2017: Seminars in Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/28531193/raman-microscopy-investigation-of-vitrification-induced-structural-damages-in-mature-bovine-oocytes
#2
Giulia Rusciano, Carolina De Canditiis, Gianluigi Zito, Marcello Rubessa, Maria Serena Roca, Rosa Carotenuto, Antonio Sasso, Bianca Gasparrini
Although oocyte cryopreservation has great potentials in the field of reproductive technologies, it still is an open challenge in the majority of domestic animals and little is known on the biochemical transformation induced by this process in the different cellular compartments. Raman micro-spectroscopy allows the non-invasive evaluation of the molecular composition of cells, based on the inelastic scattering of laser photons by vibrating molecules. The aim of this work was to assess the biochemical modifications of both the zona pellucida and cytoplasm of vitrified/warmed in vitro matured bovine oocytes at different post-warming times...
2017: PloS One
https://www.readbyqxmd.com/read/28524683/return-to-the-origin-as-a-probe-of-atomic-phase-coherence
#3
Clément Hainaut, Isam Manai, Radu Chicireanu, Jean-François Clément, Samir Zemmouri, Jean Claude Garreau, Pascal Szriftgiser, Gabriel Lemarié, Nicolas Cherroret, Dominique Delande
We report on the observation of the coherent enhancement of the return probability ["enhanced return to the origin" (ERO)] in a periodically kicked cold-atom gas. By submitting an atomic wave packet to a pulsed, periodically shifted, laser standing wave, we induce an oscillation of ERO in time that is explained in terms of a periodic, reversible dephasing in the weak-localization interference sequences responsible for ERO. Monitoring the temporal decay of ERO, we exploit its quantum-coherent nature to quantify the decoherence rate of the atomic system...
May 5, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28498204/asds-guidelines-task-force-consensus-recommendations-regarding-the-safety-of-lasers-dermabrasion-chemical-peels-energy-devices-and-skin-surgery-during-and-after-isotretinoin-use
#4
Abigail Waldman, Diana Bolotin, Kenneth A Arndt, Jeffrey S Dover, Roy G Geronemus, Anne Chapas, Sanjana Iyengar, Suzanne L Kilmer, Andrew C Krakowski, Naomi Lawrence, Heidi B Prather, Thomas E Rohrer, Bethanee J Schlosser, John Y S Kim, Peter R Shumaker, Leah K Spring, Murad Alam
BACKGROUND: Currently, the isotretinoin (13-cis-retinoic acid) package insert contains language advising the discontinuation of isotretinoin for 6 months before performing cosmetic procedures, including waxing, dermabrasion, chemical peels, laser procedures, or incisional and excisional cold-steel surgery. It is common practice to follow this standard because of concerns regarding reports of sporadic adverse events and increased risk of scarring. OBJECTIVE: To develop expert consensus regarding the safety of skin procedures, including resurfacing, energy device treatments, and incisional and excisional procedures, in the setting of concurrent or recent isotretinoin use...
May 10, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28470067/dissociative-ionization-of-argon-dimer-by-intense-femtosecond-laser-pulses
#5
Qian Cheng, Xiguo Xie, Zongqiang Yuan, Xunqi Zhong, Yunquan Liu, Qihuang Gong, Chengyin Wu
We experimentally and theoretically studied dissociative ionization of argon dimer driven by intense femtosecond laser pulses. In the experiment, we measured the ion yield and the angular distribution of fragmental ions generated from the dissociative ionization channels of (1,1) (Ar2(2+) → Ar(+) + Ar(+)) and (2,1) (Ar2(3+) → Ar(2+) + Ar(+)) using a cold target recoil ion momentum spectroscopy. The channel ratio of (2,1)/(1,1) is 4.5-7.5 times of the yield ratio of double ionization to single ionization of argon monomer depending on the laser intensity...
May 12, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28466470/an-osmotin-from-the-resurrection-plant-tripogon-loliiformis-tlosm-confers-tolerance-to-multiple-abiotic-stresses-in-transgenic-rice
#6
Thi Thuy Trang Le, Brett Williams, Sagadevan Mundree
Osmotin is a key protein associated with abiotic and biotic stress response in plants. In this study, an osmotin from the resurrection plant Tripogon loliiformis (TlOsm) was characterized and functionally analyzed under abiotic stress conditions in T. loliiformis as well as in transgenic Nicotiana tabacum (tobacco) and Oryza sativa (rice) plants. Real-time PCR analysis on mixed elicitor cDNA libraries from T. loliiformis showed that TlOsm was upregulated a thousand-fold during the early stages of osmotic stresses (cold, drought, and salinity) in both shoots and roots but down-regulated in shoots during heat stress...
May 3, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28428016/the-role-of-low-level-laser-therapy-on-neuropathic-pain-relief-and-interleukin-6-expression-following-spinal-cord-injury-an-experimental-study
#7
Negin Mojarad, Atousa Janzadeh, Mahmoud Yousefifard, Farinaz Nasirinezhad
INTRODUCTION: The effect of Low Level Laser Therapy (LLLT) as a non-invasive treatment of spinal cord injury (SCI) is still under investigation. Therefore, the present study aimed to evaluate the effectiveness of LLLT on neuropathic pain and interleukin-6 (IL-6) expression following SCI in male rats. METHODS: 46 adult male rats were divided into 5 groups of control, SCI, treatment with methylprednisolone sodium succinate (MPSS), 1-week LLLT and 2-week LLLT. Animals underwent behavioral evaluations for motor behavior, level of allodynia and hyperalgesia every week...
April 17, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/28426293/identifying-thermal-breakdown-products-of-thermoplastics
#8
Marianne Guillemot, Benoît Oury, Sandrine Melin
Polymers processed to produce plastic articles are subjected to temperatures between 150°C and 450°C or more during overheated processing and breakdowns. Heat-based processing of this nature can lead to emission of volatile organic compounds (VOCs) into the thermoplastic processing shop. In this study, laboratory experiments, qualitative and quantitative emissions measurement in thermoplastic factories were carried out. The first step was to identify the compounds released depending on the thermoplastic nature, the temperature and the type of process...
April 20, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28423462/geochemical-signatures-of-benthic-foraminiferal-shells-from-a-heat-polluted-shallow-marine-environment-provide-field-evidence-for-growth-and-calcification-under-extreme-warmth
#9
Danna Titelboim, Aleksey Sadekov, Ahuva Almogi-Labin, Barak Herut, Michal Kucera, Christiane Schmidt, Orit Hyams-Kaphzan, Sigal Abramovich
Shallow marine calcifiers play an important role as marine ecosystem engineers and in the global carbon cycle. Understanding their response to warming is essential to evaluate the fate of marine ecosystems under global change scenarios. A rare opportunity to test the effect of warming acting on natural ecosystems is by investigation of heat-polluted areas. Here we study growth and calcification in benthic foraminifera that inhabit a thermally polluted coastal area in Israel, where they are exposed to elevated temperatures reaching up to ~42°C in summer...
April 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28421084/characterization-of-the-heme-pocket-structure-and-ligand-binding-kinetics-of-non-symbiotic-hemoglobins-from-the-model-legume-lotus-japonicus
#10
Laura Calvo-Begueria, Bert Cuypers, Sabine Van Doorslaer, Stefania Abbruzzetti, Stefano Bruno, Herald Berghmans, Sylvia Dewilde, Javier Ramos, Cristiano Viappiani, Manuel Becana
Plant hemoglobins (Hbs) are found in nodules of legumes and actinorhizal plants but also in non-symbiotic organs of monocots and dicots. Non-symbiotic Hbs (nsHbs) have been classified into two phylogenetic groups. Class 1 nsHbs show an extremely high O2 affinity and are induced by hypoxia and nitric oxide (NO), whereas class 2 nsHbs have moderate O2 affinity and are induced by cold and cytokinins. The functions of nsHbs are still unclear, but some of them rely on the capacity of hemes to bind diatomic ligands and catalyze the NO dioxygenase (NOD) reaction (oxyferrous Hb + NO → ferric Hb + nitrate)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28419375/transcriptional-profiling-of-cholinergic-neurons-from-basal-forebrain-identifies-changes-in-expression-of-genes-between-sleep-and-wake-mrna-profiling-in-basal-forebrain-with-sleep-sleep-deprivation
#11
Elena V Nikonova, Jason DA Gilliland, Keith Q Tanis, Alexei A Podtelezhnikov, Alison M Rigby, Raymond J Galante, Eva M Finney, David J Stone, John J Renger, Allan I Pack, Christopher J Winrow
Study objective: To assess differences in gene expression in cholinergic basal forebrain cells between sleeping and sleep deprived mice sacrificed at the same time of day. Methods: Tg(ChAT-eGFP)86Gsat mice expressing eGFP under control of the choline acetyltransferase (Chat) promoter were utilized to guide laser capture of cholinergic cells in basal forebrain. mRNA expression levels in these cells were profiled using microarrays. Gene expression in eGFP(+) neurons was compared (1) to that in eGFP(-) neurons and to adjacent white matter, (2) between 7:00 am (lights on) and 7:00 pm (lights off), (3) between sleep deprived and sleeping animals at 0, 3, 6, 9 hrs from lights on...
April 13, 2017: Sleep
https://www.readbyqxmd.com/read/28409988/control-of-spatial-correlations-between-rydberg-excitations-using-rotary-echo
#12
N Thaicharoen, A Schwarzkopf, G Raithel
We manipulate correlations between Rydberg excitations in cold atom samples using a rotary-echo technique in which the phase of the excitation pulse is flipped at a selected time during the pulse. The correlations are due to interactions between the Rydberg atoms. We measure the resulting change in the spatial pair correlation function of the excitations via direct position-sensitive atom imaging. For zero detuning of the lasers from the interaction-free Rydberg-excitation resonance, the pair-correlation value at the most likely nearest-neighbor Rydberg-atom distance is substantially enhanced when the phase is flipped at the middle of the excitation pulse...
March 31, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28363566/encapsulation-of-the-antioxidant-ascorbyl-palmitate-in-v-type-granular-cold-water-swelling-starch-affects-the-properties-of-both
#13
D M Dries, L Knaepen, B Goderis, J A Delcour
This study reports on the functionality of V-type crystalline granular cold-water swelling starch (GCWSS) in complex with lipid (functionalized) molecules. Maize and potato GCWSS contain (empty) single helical amylose (AM) crystals which can serve as lipid complexing matrices. Different concentrations of ascorbyl palmitate (AscP) were inserted in the hydrophobic cavities of the GCWSS AM helices by a low temperature infusion method. Volumetric particle size distributions of the ensuing products in water were determined using laser light scattering...
June 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28362367/sublimation-of-dan-matrix-for-the-detection-and-visualization-of-gangliosides-in-rat-brain-tissue-for-maldi-imaging-mass-spectrometry
#14
Sarah Caughlin, Dae Hee Park, Ken K-C Yeung, David F Cechetto, Shawn N Whitehead
Sample preparation is key for optimal detection and visualization of analytes in Matrix-assisted Laser Desorption/Ionization (MALDI) Imaging Mass Spectrometry (IMS) experiments. Determining the appropriate protocol to follow throughout the sample preparation process can be difficult as each step must be optimized to comply with the unique characteristics of the analytes of interest. This process involves not only finding a compatible matrix that can desorb and ionize the molecules of interest efficiently, but also selecting the appropriate matrix deposition technique...
March 23, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28349733/transgender-phonosurgery-a-systematic-review-and-meta-analysis
#15
Tara Elena Song, Nancy Jiang
Objectives Different surgical techniques have been described in the literature to increase vocal pitch. The purpose of this study is to systematically review these surgeries and perform a meta-analysis to determine which technique increases pitch the most. Data Sources CINAHL, Cochrane, Embase, Medline, PubMed, and Science Direct. Review Methods A systematic review and meta-analysis of the literature was performed using the CINAHL, Cochrane, Embase, Medline, PubMed, and Science Direct databases. Studies were eligible for inclusion if they evaluated pitch-elevating phonosurgical techniques in live humans and performed pre- and postoperative acoustic analysis...
March 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28341834/grating-chips-for-quantum-technologies
#16
James P McGilligan, Paul F Griffin, Rachel Elvin, Stuart J Ingleby, Erling Riis, Aidan S Arnold
We have laser cooled 3 × 10(6 87)Rb atoms to 3 μK in a micro-fabricated grating magneto-optical trap (GMOT), enabling future mass-deployment in highly accurate compact quantum sensors. We magnetically trap the atoms, and use Larmor spin precession for magnetic sensing in the vicinity of the atomic sample. Finally, we demonstrate an array of magneto-optical traps with a single laser beam, which will be utilised for future cold atom gradiometry.
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28339248/anderson-transition-of-cold-atoms-with-synthetic-spin-orbit-coupling-in-two-dimensional-speckle-potentials
#17
Giuliano Orso
We investigate the metal-insulator transition occurring in two-dimensional (2D) systems of noninteracting atoms in the presence of artificial spin-orbit interactions and a spatially correlated disorder generated by laser speckles. Based on a high order discretization scheme, we calculate the precise position of the mobility edge and verify that the transition belongs to the symplectic universality class. We show that the mobility edge depends strongly on the mixing angle between Rashba and Dresselhaus spin-orbit couplings...
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28323482/constraints-on-the-early-terrestrial-surface-uv-environment-relevant-to-prebiotic-chemistry
#18
Sukrit Ranjan, Dimitar D Sasselov
The UV environment is a key boundary condition to abiogenesis. However, considerable uncertainty exists as to planetary conditions and hence surface UV at abiogenesis. Here, we present two-stream multilayer clear-sky calculations of the UV surface radiance on Earth at 3.9 Ga to constrain the UV surface fluence as a function of albedo, solar zenith angle (SZA), and atmospheric composition. Variation in albedo and latitude (through SZA) can affect maximum photoreaction rates by a factor of >10.4; for the same atmosphere, photoreactions can proceed an order of magnitude faster at the equator of a snowball Earth than at the poles of a warmer world...
March 2017: Astrobiology
https://www.readbyqxmd.com/read/28322007/one-electron-initiated-two-electron-oxidation-of-water-by-aluminum-porphyrins-with-earth-s-most-abundant-metal
#19
Fazalurahman Kuttassery, Siby Mathew, Shogo Sagawa, Sebastian Nybin Remello, Arun Thomas, Daisuke Yamamoto, Satomi Onuki, Yu Nabetani, Hiroshi Tachibana, Haruo Inoue
We report herein a new molecular catalyst for efficient water splitting, aluminum porphyrins (tetra-methylpyridiniumylporphyrinatealuminum: AlTMPyP), containing earth's most abundant metal as the central ion. One-electron oxidation of the aluminum porphyrin initiates the two-electron oxidation of water to form hydrogen peroxide as the primary reaction product with the lowest known overpotential (97 mV). The aluminum-peroxo complex was detected by a cold-spray ionization mass-spectrometry in high-resolution MS (HRMS) mode and the structure of the intermediate species was further confirmed using laser Raman spectroscopy, indicating the hydroperoxy complex of AlTMPyP to be the key intermediate in the reaction...
March 20, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28294217/competition-between-stacked-and-hydrogen-bonded-structures-of-cytosine-aggregates
#20
Jorge González, Imanol Usabiaga, Pedro F Arnaiz, Iker León, Rodrigo Martínez, Judith Millán, José A Fernández
The four bases of DNA constitute what is known as the "alphabet of life". Their combination of proton-donor and acceptor groups and aromatic rings allows them to form stacking structures and at the same time establish hydrogen bonds with their counterparts, resulting in the formation of the well-known double-helix structure of DNA. Here we explore the aggregation preferences of cytosine in supersonic expansions, using a combination of laser spectroscopic techniques and computations. The data obtained from the experiments carried out in the cold and isolated environment of the expansion allowed us to establish which are the leading interactions behind aggregation of cytosine molecules...
March 15, 2017: Physical Chemistry Chemical Physics: PCCP
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