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https://www.readbyqxmd.com/read/28742126/the-pre-columbian-introduction-and-dispersal-of-algarrobo-prosopis-section-algarobia-in-the-atacama%C3%A2-desert-of-northern-chile
#1
Virginia B McRostie, Eugenia M Gayo, Calogero M Santoro, Ricardo De Pol-Holz, Claudio Latorre
Archaeological and palaeoecological studies throughout the Americas have documented widespread landscape and environmental transformation during the pre-Columbian era. The highly dynamic Formative (or Neolithic) period in northern Chile (ca. 3700-1550 yr BP) brought about the local establishment of agriculture, introduction of new crops (maize, quinoa, manioc, beans, etc.) along with a major population increase, new emergent villages and technological innovations. Even trees such as the Algarrobos (Prosopis section Algarobia) may have been part of this transformation...
2017: PloS One
https://www.readbyqxmd.com/read/28740477/corrigendum-to-be-or-not-to-be-retained%C3%A2-that-s-the-question-retention-self-esteem-self-concept-achievement-goals-and-grades
#2
Francisco Peixoto, Vera Monteiro, Lourdes Mata, Cristina Sanches, Joana Pipa, Leandro S Almeida
[This corrects the article on p. 1550 in vol. 7, PMID: 27790167.].
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28738220/adolescent-peer-networks-and-the-moderating-role-of-depressive-symptoms-on-developmental-trajectories-of-cannabis-use
#3
Michael S Pollard, Joan S Tucker, Harold D Green, Kayla de la Haye, Dorothy L Espelage
This paper investigated how depressive symptoms moderate the role of peer cannabis use on developmental patterns of individual cannabis use from adolescence to young adulthood, controlling for a broad set of individual and family factors. Data from two sources were analyzed separately: two saturated schools in the National Longitudinal Study of Adolescent to Adult Health Waves I-III (N=1550) covering 1994-2001; and three schools in the CARBIN study, covering 2012-2014. Discrete mixture models identified developmental trajectories of cannabis use in each data source, and logit models linked network and depressive symptom information to the trajectories...
July 19, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28737627/direct-and-indirect-effectiveness-of-the-ten-valent-pneumococcal-conjugate-vaccine-against-carriage-in-a-cluster-randomized-trial
#4
Arto A Palmu, Maija Toropainen, Tarja Kaijalainen, Lotta Siira, Mika Lahdenkari, Heta Nieminen, Ritva K Syrjänen, Terhi M Kilpi, Jukka Jokinen
Finnish Invasive Pneumococcal disease (FinIP) vaccine trial was designed to evaluate effectiveness of ten-valent pneumococcal conjugate vaccine (PHiD-CV10, GSK). We conducted two satellite studies to evaluate PHiD-CV10 effectiveness against pneumococcal carriage in FinIP-vaccinated children (long-term direct and indirect effectiveness combined) and in their unvaccinated siblings (indirect effectiveness within the family).FinIP was a cluster-randomized trial, where >47000 children <19 months of age were recruited 2009-2010...
July 21, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28730745/influence-of-minor-deterioration-of-renal-function-after-pci-on-outcome-in-patients-with-st-elevation-myocardial-infarction
#5
Vojko Kanic, David Suran, Maja Vollrath, Alojz Tapajner, Gregor Kompara
OBJECTIVES: Our aim was to assess the possible impact of a deterioration of renal function (DRF) not fulfilling the criteria for acute kidney injury after percutaneous coronary intervention (PCI) on outcome in patients with ST-elevation myocardial infarction (STEMI) on 30-day and long-term outcomes. BACKGROUND: Data is lacking on the influence of DRF after PCI on outcome in patients with STEMI. METHODS: The present study is an analysis of 2572 STEMI patients who underwent PCI...
July 20, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28708148/real-time-fiber-optic-anemometer-based-on-a-laser-heated-few-layer-graphene-in-an-aligned-graded-index-fiber
#6
Ran Gao, Danfeng Lu, Jin Cheng, Zhi-Mei Qi
A real-time all-fiber anemometer based on laser-heated few-layer graphene in aligned graded-index fibers has been proposed and experimentally demonstrated. The proposed fiber-optic anemometer was composed of a pair of all-fiber collimators by using aligned graded-index fibers that was coated with the few-layer graphene. The few-layer graphene was heated through a heating light from a 532-nm laser, which changed the optical transmittance of signal light with the wavelength of 1550 nm. The wind speed can be measured through the transmission power of the signal light based on the wind cooling effects on the heated few-layer graphene, acting as a "hot-wire" anemometer...
July 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28699571/irrational-coefficients-in-renaissance-algebra
#7
Jeffrey A Oaks
Argument From the time of al-Khwārizmī in the ninth century to the beginning of the sixteenth century algebraists did not allow irrational numbers to serve as coefficients. To multiply by x, for instance, the result was expressed as the rhetorical equivalent of . The reason for this practice has to do with the premodern concept of a monomial. The coefficient, or "number," of a term was thought of as how many of that term are present, and not as the scalar multiple that we work with today. Then, in sixteenth-century Europe, a few algebraists began to allow for irrational coefficients in their notation...
June 2017: Science in Context
https://www.readbyqxmd.com/read/28689214/confirmatory-factor-analysis-of-the-finnish-job-content-questionnaire-jcq-in-590-professional-musicians
#8
Heidi Vastamäki, Martti Vastamäki, Katri Laimi, Michail Saltychev
BACKGROUND: Poorly functioning work environments may lead to dissatisfaction for the employees and financial loss for the employers. The Job Content Questionnaire (JCQ) was designed to measure social and psychological characteristics of work environments. OBJECTIVE: To investigate the factor construct of the Finnish 14-item version of JCQ when applied to professional orchestra musicians. METHODS: In a cross-sectional survey, the questionnaire was sent by mail to 1550 orchestra musicians and students...
July 2017: International Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28674440/submicron-scale-broadband-polarization-beam-splitter-using-cmos-compatible-materials
#9
Ming-Sheng Lai, Chia-Chien Huang
We propose a polarization beam splitter (PBS) with a footprint of only 600 × 790 nm(2) operating at a wavelength of λ = 1550 nm, which is the smallest PBS ever demonstrated. This device uses CMOS-compatible materials, namely, silicon and silica. The present PBS comprises two Si waveguides with different geometrical aspect ratios adjoined side-by-side, which separates the transverse-electric (TE) and transverse-magnetic (TM) modes without relying on an additional coupling region. The designed PBS achieves a polarization extinction ratio of approximately 25 dB for both modes and insertion losses of approximately 0...
July 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28666541/management-of-elderly-women-with-endometrial-cancer
#10
Holm Eggemann, Tanja Ignatov, Elke Burger, Serban Dan Costa, Atanas Ignatov
BACKGROUND: Elderly women with endometrial cancer receive less therapy in comparison with their younger counterparts. The exact reason(s) for this treatment strategy remains unclear. PATIENTS AND METHODS: We performed a multicenter, retrospective registry-based study of 1550 patients with endometrial cancer. The outcome measure was the reason for not performing the indicated treatment. RESULTS: Median follow-up was 76.8months. A total of 1550 women were eligible for analysis: 353 (22...
June 27, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28665161/long-term-results-of-the-treatment-of-pregnancy-induced-striae-distensae-using-a-1550-nm-non-ablative-fractional-laser
#11
Hilal Gokalp
BACKGROUND: Striae distensae (SD) are a type of dermal scarring that is quite common and difficult to treat. Two forms are known: striae rubrae (SR) and striae albae (SA). OBJECTIVE: We evaluated and compared the long-term clinical effectiveness of SR and SA treatment using a 1550-nm non-ablative fractional laser (NAFL). MATERIALS AND METHODS: We included 16 female patients (8 with SR and 8 with SA) who had developed abdominal SD during pregnancy...
June 30, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28664362/multifarious-allelochemicals-exhibiting-antifungal-activity-from-bacillus-subtilis-mbcu5
#12
Urja Pandya, Sunita Prakash, Kishor Shende, Umesh Dhuldhaj, Meenu Saraf
A potential antagonist, designated strain Bacillus subtilis MBCU5 was previously isolated from vermicompost-amended soils of Gandhinagar, Gujarat, India. Crude allelochemicals from strain MBCU5 displayed strong antifungal activity against Macrophomina phaseolina as well as Rhizoctonia solani. These crude allelochemicals were tentatively identified as iturin, fengycin and surfactin through TLC and HPTLC analysis. Lipopeptides produced by MBCU5 were identified by MALDI-TOF-MS and LC-ESI-MS/MS analysis showed that iturin homologues (m/z 1020-1120), surfactin (m/z 1008...
July 2017: 3 Biotech
https://www.readbyqxmd.com/read/28657091/depleted-upconversion-luminescence-in-nayf4-yb-3-tm-3-nanoparticles-via-simultaneous-two-wavelength-excitation
#13
Hongxin Zhang, Tianqing Jia, Long Chen, Yuchan Zhang, Shian Zhang, Donghai Feng, Zhenrong Sun, Jianrong Qiu
We report optical depletion of upconversion luminescence (UCL) in NaYF4:Yb(3+),Tm(3+) nanoparticles excited simultaneously by 980 nm and 1550 nm lasers. The UCL intensity is greatly depleted, while the downshifted emission at 1210 nm is obviously enhanced. The disturbances of 1550 nm photons on energy transfer between Yb(3+) and Tm(3+), cross relaxation (CR), the thermal effect and the stimulated emission depletion (STED) process are qualitatively evaluated. Our investigations verify that the unexpected depletion phenomena are governed by the STED process...
July 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28636013/new-insights-into-the-solubility-of-graphene-oxide-in-water-and-alcohols
#14
Vadim V Neklyudov, Nail R Khafizov, Igor A Sedov, Ayrat M Dimiev
One of the main advantages of graphene oxide (GO) over its non-oxidized counterpart is its ability to form stable solutions in water and some organic solvents. At the same time, the nature of GO solutions is not completely understood; the existing data are scarce and controversial. Here, we demonstrate that the solubility of GO, and the stability of the as-formed solutions depend not just on the solute and solvent cohesion parameters, as commonly believed, but mostly on the chemical interactions at the GO/solvent interface...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28634799/assessment-of-heat-inactivated-marine-aspergillus-flavus-as-a-novel-biosorbent-for-removal-of-cd-ii-hg-ii-and-pb-ii-from-water
#15
Mohamed E Mahmoud, Gehan M El Zokm, Aida E M Farag, Mohamed S Abdelwahab
A novel marine fungus was isolated and classified as Aspergillus flavus strain EGY11. The heat-inactivated form of isolated Aspergillus flavus was investigated and evaluated as a new eco-friendly and highly efficient biosorbent for removal of toxic heavy metals such as Cd(II), Hg(II), and Pb(II) from aqueous solutions. The SEM morphological studies of biosorbent-loaded metal ions confirmed their direct binding on the surface of heat-inactivated Aspergillus flavus. The metal biosorption capacity values were determined and optimized by the batch technique in the presence of various experimental controlling factors such as pH, contact time, biosorbent dosage, initial metal ion concentration, and coexisting species...
June 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28630483/comprehensive-analysis-of-passive-generation-of-parabolic-similaritons-in-tapered-hydrogenated-amorphous-silicon-photonic-wires
#16
Chao Mei, Feng Li, Jinhui Yuan, Zhe Kang, Xianting Zhang, Binbin Yan, Xinzhu Sang, Qiang Wu, Xian Zhou, Kangping Zhong, Liang Wang, Kuiru Wang, Chongxiu Yu, P K A Wai
Parabolic pulses have important applications in both basic and applied sciences, such as high power optical amplification, optical communications, all-optical signal processing, etc. The generation of parabolic similaritons in tapered hydrogenated amorphous silicon photonic wires at telecom (λ ~ 1550 nm) and mid-IR (λ ≥ 2100 nm) wavelengths is demonstrated and analyzed. The self-similar theory of parabolic pulse generation in passive waveguides with increasing nonlinearity is presented. A generalized nonlinear Schrödinger equation is used to describe the coupled dynamics of optical field in the tapered hydrogenated amorphous silicon photonic wires with either decreasing dispersion or increasing nonlinearity...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28621978/self-similar-nanocavity-design-with-ultrasmall-mode-volume-for-single-photon-nonlinearities
#17
Hyeongrak Choi, Mikkel Heuck, Dirk Englund
We propose a photonic crystal nanocavity design with self-similar electromagnetic boundary conditions, achieving ultrasmall mode volume (V_{eff}). The electric energy density of a cavity mode can be maximized in the air or dielectric region, depending on the choice of boundary conditions. We illustrate the design concept with a silicon-air one-dimensional photon crystal cavity that reaches an ultrasmall mode volume of V_{eff}∼7.01×10^{-5}λ^{3} at λ∼1550  nm. We show that the extreme light concentration in our design can enable ultrastrong Kerr nonlinearities, even at the single-photon level...
June 2, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28618248/effect-of-attitudes-towards-patients-on-sexual-history-taking-a-survey-of-iranian-american-physicians-in-california-usa
#18
Mitra Rashidian, Victor Minichiello, Synnove F Knutsen, Mark Ghamsary
Background: Although obtaining sexual history from patients is essential, the attitudes of physicians can become a barrier to sexual health care. Iranian-American physicians may face particular challenges because talking about sexuality is considered a taboo within their culture. Our study examined these physicians' attitudes when taking a sexual history from their patients. Methods: In 2013, a self-administrated questionnaire was sent to 1550 Iranian-American physicians in California, USA. Using factor analysis, the principal components approach with a Varimax rotation was used on a set of 12-item questions (five-point Likert scales) to detect latent factors that explain attitudes affecting sexual history taking...
June 16, 2017: Sexual Health
https://www.readbyqxmd.com/read/28580373/acousto-optic-modulation-and-opto-acoustic-gating-in-piezo-optomechanical-circuits
#19
Krishna C Balram, Marcelo I Davanço, B Robert Ilic, Ji-Hoon Kyhm, Jin Dong Song, Kartik Srinivasan
Acoustic wave devices provide a promising chip-scale platform for efficiently coupling radio frequency (RF) and optical fields. Here, we use an integrated piezo-optomechanical circuit platform that exploits both the piezoelectric and photoelastic coupling mechanisms to link 2.4 GHz RF waves to 194 THz (1550 nm) optical waves, through coupling to propagating and localized 2.4 GHz acoustic waves. We demonstrate acousto-optic modulation, resonant in both the optical and mechanical domains, in which waveforms encoded on the RF carrier are mapped to the optical field...
February 2017: Physical Review Applied
https://www.readbyqxmd.com/read/28569890/light-induced-self-written-waveguide-fabrication-using-1550%C3%A2-%C3%A2-nm-laser-light
#20
Hidetaka Terasawa, Freddy Tan, Okihiro Sugihara, Akari Kawasaki, Daisuke Inoue, Tatsuya Yamashita, Manabu Kagami, Olivier Maury, Yann Bretonnière, Chantal Andraud
Light-induced self-written (LISW) optical waveguides were fabricated for the first time, to the best of our knowledge, using a photopolymerizable resin system formed by 1550 nm pulse laser light. A two-photon absorption (TPA) chromophore with a TPA cross section of several hundred Goeppert-Mayer (GM) at 1550 nm was used. Furthermore, the optical interconnection between a single-mode fiber and a fiber Bragg grating was demonstrated by the present technique, using one-way irradiation of 1550 nm laser light through the single-mode fiber...
June 1, 2017: Optics Letters
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