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K Karmisholt, A Haerskjold, T Karlsmark, J Waibel, U Paasch, M Haedersdal
The ability of laser treatment to affect wound healing and subsequently minimize scar formation has been investigated in recent years. However, no systematic review links these clinical trials. The aim of this study is to systematically review and evaluate clinical evidence for early laser intervention to reduce scar formation in studies where laser treatment were introduced less than 3 months after wounding. We searched PubMed using relevant key words in June 2017. Titles, abstracts and articles were sorted according to inclusion and exclusion criteria...
February 8, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
Chiara Greganti, Peter Schiansky, Irati Alonso Calafell, Lorenzo M Procopio, Lee A Rozema, Philip Walther
Multi-photon state generation is of great interest for near-future quantum simulation and quantum computation experiments. To-date spontaneous parametric down-conversion is still the most promising process, even though two major impediments still exist: accidental photon noise (caused by the probabilistic non-linear process) and imperfect single-photon purity (arising from spectral entanglement between the photon pairs). In this work, we overcome both of these difficulties by (1) exploiting a passive temporal multiplexing scheme and (2) carefully optimizing the spectral properties of the down-converted photons using periodically-poled KTP crystals...
February 5, 2018: Optics Express
Sima Shahabi, Hadi Assadian, Alireza Mahmoudi Nahavandi, Hanieh Nokhbatolfoghahaei
Introduction: The demand for esthetic dental treatments is increasing in recent years mainly due to improved oral hygiene and better maintenance of oral health and teeth in older individuals. Bleaching of discolored anterior teeth is the most popular among esthetic dental treatments. Even individuals with sound teeth and adequate esthetics seek to have whiter teeth in the anterior region. The aim of this study was to evaluate tooth color changes following conventional in-office bleaching techniques compared to light-activated methods using different light sources...
2018: Journal of Lasers in Medical Sciences
Xin Zhao, Jia-Le Song, Ruokun Yi, Guijie Li, Peng Sun, Kun-Young Park, Huayi Suo
Kudingcha is a traditional Chinese tea, and insect tea is a special drink produced by the metabolism of insect larvae using the raw Kuding tea. Insect tea polyphenols (ITP) and its raw tea (Kuding tea) polyphenols (KTP) are high-purity polyphenols extracted by centrifuge precipitation. The present study was designed to compare the antioxidative effects of insect tea polyphenols (ITP) and its raw tea (Kuding tea) polyphenols (KTP) on d-galactose-induced oxidation in Kunming (KM) mice. KM mice were treated with ITP (200 mg/kg) and KTP (200 mg/kg) by gavage, and vitamin C (VC, 200 mg/kg) was also used as a positive control by gavage...
January 19, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Matthew R Hoffman, Heidi Kletzien, Seth H Dailey, J Scott McMurray
Zenker's diverticulum is a rare cause of progressive dysphagia that is treated surgically. KTP laser-based diverticulotomy is one effective treatment. Developing a simulation model is helpful for rare conditions. Pigs have a natural hypopharyngeal pouch similar to a diverticulum. We present a model for performing rigid endoscopic KTP laser diverticulotomy in a porcine model using a laryngeal dissection station. Eleven pigs were examined to confirm presence of the hypopharyngeal pouch. A specimen was mounted on the modified laryngeal dissection station and a KTP laser-based diverticulotomy was performed...
December 2017: OTO Open
K Lohith, K A Anu-Appaiah
The morphological transition from yeast to a hyphal form, as well as the adhesion capability to the gastrointestinal tract, are implicated virulent determinant in Candida albicans and could be potential targets for prevention of the opportunistic pathogen. Based on this rationale, two yeast strains Saccharomyces cerevisiae KTP and Issatchenkia occidentalis ApC along with reference strain Saccharomyces boulardii NCDC 363 were screened for the probiotic potential. Characters like pH, temperature, bile, simulated gastrointestinal juice tolerance tests, and Caco-2 cell line adhesion assay were determined in the present study...
January 11, 2018: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
Christopher M Johnson, Mariah B Pate, Gregory N Postma
Standard KTP laser (potassium titanyl phosphate) wavelength-specific protective eyewear often impairs visualization of tissue changes during laser treatment. This sometimes necessitates eyewear removal to evaluate tissue effects, which wastes time and poses safety concerns. The objective was to determine if "virtual" or "electronic" chromoendoscopy filters, as found on some endoscopy platforms, could alleviate the restricted visualization inherent to protective eyewear. A KTP laser was applied to porcine laryngeal tissue and recorded via video laryngoscopy with 1 optical (Olympus Narrow Band Imaging) and 8 digital (Pentax Medical I-scan) chromoendoscopy filters...
January 1, 2018: Otolaryngology—Head and Neck Surgery
Xiufa Wu, Wenjing Mao, Peijie He, Chunsheng Wei
PURPOSE: To evaluate three methods for treating adult laryngeal hemangiomas: conventional chemotherapy, CO2 laser combined with chemotherapy, and KTP laser. And to identify risk factors that affected the prognosis of the lesions. METHOD: A retrospective analysis was performed on the data from patients with adult laryngeal hemangiomas treated by one of three aforementioned methods, the curative efficacy, and safety of those methods was compared. RESULTS: All cases were confirmed by suspension micro-laryngoscope examination...
January 8, 2018: Acta Oto-laryngologica
Tamotsu Tsukahara, Shuhei Yamagishi, Hiroyuki Neyama, Hiroshi Ueda
Kyotorphin (KTP; L-tyrosyl-L-arginine), an opioid-like analgesic discovered in the bovine brain, is potentially a neuromodulator because of its localization in synaptosomes, the existence of a specific KTP receptor, and the presence of its biosynthetic enzyme in the brain. KTP is formed in the brain from its constituent amino acids, L-tyrosine and L-arginine, by an enzyme termed KTP synthetase. However, the latter has never been identified. We aimed to test the hypothesis that tyrosyl-tRNA synthetase (TyrRS) is also KTP synthetase...
December 28, 2017: Peptides
Qiang Zhang, Boxing Zhu, Deping Zhang, Jingwang Gu, Dongfeng Zhao, Yang Chen
We present a pulsed single longitudinal mode optical parametric oscillator that was recently constructed for sub-Doppler spectroscopic studies of transient species in a supersonic slit jet expansion environment. The system consists of a Littman-type grazing-incidence-grating resonator and a KTP crystal and is pumped at 532 nm. By spatially filtering the pump laser beam and employing an active cavity-length-stabilization scheme, a frequency down-conversion efficiency up to 18% and generation of Fourier-transform limited pulses with a typical pulse duration of ∼5...
December 2017: Review of Scientific Instruments
P Bargiela-Perez, J Gonzalez-Merchan, R Diaz-Sanchez, M-A Serrera-Figallo, G Volland, M Joergens, J-L Gutierrez-Perez, D Torres-Lagares
BACKGROUND: The aim of this study is to evaluate the resection of hyperplastic lesions on the buccal mucosa comparing the 532nm laser (KTP), versus diode 980nm laser, considering pain, scarring, inflammation and drug consumption that occurred postoperatively with each lasers. MATERIAL AND METHODS: A prospective study of consecutive series of 20 patients in two groups that presents hyperplastic lesions on the buccal mucosa. The choice of the KTP laser or diode 980nm laser for the surgery was made randomly...
December 23, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
Phil Liebing, Marcel Kühling, Josef Takats, Liane Hilfert, Frank T Edelmann
The reaction of EuI2(THF)2 with potassium hydro-tris-(3,5-diiso-propyl-pyrazol-yl)borate (K[HB(3,5- iPr2pz)3] (= KTp iPr2, pz = pyrazol-yl) in a molar ratio of 1:1.5 resulted in extensive ligand fragmentation and formation of the europium(II) mono(scorpionate) complex bis-(3,5-diisopropyl-1H-pyrazole)[hydro-tris-(3,5-diiso-propyl-pyrazol-yl)borato]iodido-europium(II), [Eu(C27H46BN6)I(C9H16N2)2] or (Tp iPr2)(3,5- iPr2pzH)2EuIII, 1, in high yield (78%). As a typical by-product, small amounts of the sterically crowded pyraza-bole derivative trans-4,8-bis-(3,5-diiso-propyl-pyrazol-1-yl)-1,3,5,7-tetra-iso-propyl-pyraza-bole, C36H62B2H8 or trans-{(3,5- iPr2pz)HB(μ-3,5- iPr2pz)}2, 2, were formed...
December 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Grzegorz Piotrowicz, Tomasz Syryło, Rafał Jedynak, Henryk Zieliński
OBJECTIVE: The objective of this study was to evaluate the safety and effectiveness of photoselective vaporization of the prostate (PVP) in the treatment of patients with benign prostatic hyperplasia (BPH) on anticoagulant or antiplatelet therapy. BACKGROUND: The "gold standard" of surgical treatment of BPH is transurethral resection of the prostate (TURP). Since the risk of complications associated with TURP is still significant, there is a continuous search for safer and equally effective procedures...
December 11, 2017: Photomedicine and Laser Surgery
Sonam Dodhia, Peter C Baxter, Fei Ye, Michael J Pitman
OBJECTIVES: Recurrent respiratory papillomatosis is often treated with in-office laser procedures using a potassium titanyl phosphate (KTP) laser transmitted through a laser fiber. Although effective, this procedure has notable downsides, including the possibility of transmitting human papillomavirus (HPV) in the smoke plume and the high cost of these single-use fibers. The objective of this study is to determine if HPV can be detected on a laser fiber after use, with or without sterilization...
November 24, 2017: Laryngoscope
Dilara Arslan, Alper Kuştarcı
The purpose of this study was to evaluate the effects of potassium-titanyl-phosphate (KTP) laser irradiation on smear layer removal and temperature changes of the root surfaces. Two hundred four extracted single-root human premolars were included. The canals were instrumented and divided into two main groups: group A (smear layer examination n:119) and group B (temperature change examination n:85). Each group was divided into subgroups (n:17) according to the different five laser power settings: A1, B1: 1 W-5...
November 6, 2017: Lasers in Medical Science
Laura M Dominguez, Raymond J Brown, C Blake Simpson
OBJECTIVE: To determine the effectiveness of in-office potassium-titanyl-phosphate (KTP) treatment of vocal fold granulomas and identify any predictors of complete lesion resolution. METHODS: A retrospective review of patients who underwent in-office KTP ablation of vocal fold granulomas between 2007 and 2016 was performed. Medical records were reviewed for use of acid suppression medication, prior surgical treatment, voice therapy, laser settings, number of treatments, follow-up time, and Voice Handicap Index-10 (VHI-10) scores...
December 2017: Annals of Otology, Rhinology, and Laryngology
Martin F Volk, Christian E Rüter, Detlef Kip
We report on characterization of ridge waveguides fabricated in KTP (KTiOPO4) by use of diamond-blade dicing and Rb/Ba ion exchange. The waveguides were prepared in substrates that have their z-axis in the surface plane, perpendicular to the waveguide direction. This hinders the RbBa ions from diffusion into the depth, as they are only mobile along the z-axis, and improves the waveguide's resistance against elevated temperature. Attenuation coefficients of 0.3 dB/cm (0.4 dB/cm) for TM (TE) polarization were measured at 1060 nm wavelength...
August 21, 2017: Optics Express
Jingyi Tian, Yuanqing Yang, Min Qiu, Fredrik Laurell, Valdas Pasiskevicius, Hoon Jang
We employ ferroelectrics to study the multipolar scattering in all-dielectric metasurfaces based on KTiOPO4 (KTP) micro-disks for efficient manipulation of electromagnetic waves in the THz spectral region (0.6-1.5 THz). By adjusting the aspect ratio of the disks near the multipolar resonances, we show that the KTP disk array can form a multifunctional metasurface that covers the entire range of the electromagnetic response with resonantly enhanced anisotropic properties. The proposed ferroelectric metasurfaces will provide a versatile platform to manipulate THz waves, and open possibilities to monolithically combine it with THz generation...
October 2, 2017: Optics Express
Jamal Ahmed, Ahmed Sherif Gabr Ibrahim, Laura M Freedman, David E Rosow
OBJECTIVES/HYPOTHESIS: To characterize outcomes for patients who underwent transoral microsurgery with potassium titanyl phosphate (KTP) laser resection of early glottic cancers and to compare outcomes with patients who received external beam radiation therapy. STUDY DESIGN: Retrospective cohort study. METHODS: The history of patients with T1 glottic carcinoma treated with curative primary radiation or transoral KTP laser resection was reviewed...
September 12, 2017: Laryngoscope
C C Ding, S Y Wu, L J Zhang, Y Q Xu, Z H Zhang, M H Wu, B H Teng
Making use of the perturbation formulae for 3d(1) ions (Ti(3+) and V(4+) ) under orthorhombically compressed octahedra, the spin Hamiltonian parameters (SHPs) (g factors: gx , gy , gz and hyperfine structure constants: Ax , Ay , Az ) and local structures of the 3d(1) impurity centres C1 , C2 and C3 in KTP crystals are theoretically analyzed in a consistent way. The remarkable local distortions (i.e., the relative axial compression ratios 11.2%, 7.0% and 5.5% along Z axis and the relative planar bond length variation ratios 15...
September 6, 2017: Magnetic Resonance in Chemistry: MRC
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