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  Bestsellers

  • articleNo Access

    About the theory of the physical nature of light

    This article proposes a new refined definition of light, which makes it possible to harmonize the wave and corpuscular concepts of this object of matter and quantitative relations that describe the wave-corpuscular nature of the phenomena of interference, diffraction, dispersion, polarization, external and internal photoeffects as phenomena as well as such electroluminescence and photoluminescence associated with light.

  • articleNo Access

    Hall effects in monolayer MoS2 with spin-orbit coupling under the shining of a circularly polarized light

    In this paper, we study Hall effects of the monolayer MoS2 with Rashba and Ising spin-orbit coupling (SOC) under the application of a circularly polarized light. The Chern number and spin textures at high frequency regime are studied based on the Floquet theory. We found that the SOCs induced valley Hall effect. The sign of Chern numbers at high frequency regime can be reversed by engineering interplay between Ising SOC and light intensity. The system undergoes a topological phase transition from valley Hall state to anomalous Hall state. By analyzing the spin texture, we study the origin of the Hall effects.

  • articleNo Access

    BIOBOARD

      INDIA – Lack of access to technology ‘hampers detection of substandard drugs’.

      JAPAN – Daiichi Sankyo announces development of nucleic acid treatment for Duchenne muscular dystrophy utilizing proprietary technology.

      SINGAPORE – IBN creates unlimited source of human kidney cells.

      SINGAPORE – Dyesol and Singapore's NTU sign agreement.

      THE PHILIPPINES – Global biotech/GM crop plantings increase 100-fold from 1996.

      AUSTRALIA – Phosphagenics further expands pain portfolio.

      AUSTRALIA – Primary Health Care signs Australia distribution agreement for iGeneScreen™ prenatal test.

      AUSTRALIA – Folic acid in pregnancy linked with reduced autism risk.

      AUSTRALIA – Phylogica and Bio-Link collaborate to commercialize anti-inflammatory Phylomers.

      AUSTRALIA – ABRAXANE® plus gemcitabine improves survival in Phase III study of patients with advanced pancreatic cancer.

      CANADA – Verisante Technology, Inc. announces first sales of aura, a revolutionary medical device for the detection of skin cancer.

      EUROPE – Project eyes robust medical technology for poor countries.

      UNITED KINGDOM – Asthma sufferers have more lung fungi.

      UNITED KINGDOM – Pioneering drug discovery gets major funding to move to next stage.

      UNITED STATES – Gilead's sofosbuvir for hepatitis C meets primary endpoint in fourth pivotal Phase III study.

      UNITED STATES – Eleven Biotherapeutics publishes data on EBI-005, a novel IL-1 inhibitor protein for topical treatment of dry eye disease.

      UNITED STATES – Phase I/II trial of ADXS-HPV in anal cancer conducted by Brown University Oncology Group.

      UNITED STATES – Scopolamine: An old drug with new psychiatric applications.

      UNITED STATES – New bioengineered ears look and act like the real thing.

      UNITED STATES – To trap a rainbow, slow down light.

      UNITED STATES – AB SCIEX responds to milk contamination concerns with new method to detect dicyandiamide.

    • articleNo Access

      Biological evaluation of a Porphyrin-SPION nanoconjugate as an antimicrobial magnetic photosensitizer

      The present work describes the use of a magnetic porphyin (5-(4-carboxy-phenyl)-10,15,20-triphenyl-21H, 23H-porphyrin TPP) nanoconjugate (SPION-TPP) for destroying pathogenic bacteria followed by the recovery of the magnetic photosensitizer. SPION-TPP was tested for its activity against two different gram-positive bacterial strains (Staphylococcus aureus and Steptoccoccus mutans). It is observed that SPION-TPP at a very low concentration of 0.5 μM is effective in destroying gram-positive bacteria (107–108 CFU ml-1)S. aureus with several orders reduction and few orders in S. mutans. The aim of this work is to combine photoactivity against microorganisms imparted by the photosensitizer with the possibility of recovering the nanoconstruct with magnets for disposal/reuse.

    • chapterNo Access

      1: Introduction

        Some people think that carbon and sustainable development are not compatible. This textbook shows that carbon dioxide (CO2) from the air and bio-carbon from biomass are our best allies in the energy transition, towards greater sustainability. We pose the problem of the decarbonation (or decarbonization) of our economy by looking at ways to reduce our dependence on fossil carbon (coal, petroleum, natural gas, bitumen, carbonaceous shales, lignite, peat). The urgent goal is to curb the exponential increase in the concentration of carbon dioxide in the atmosphere and hydrosphere (Figures 1.1 and 1.2) that is directly related to our consumption of fossil carbon for our energy and materials The goal of the Paris agreement (United Nations COP 21, Dec. 12, 2015) of limiting the temperature increase to 1.5 degrees (compared to the pre-industrial era, before 1800) is becoming increasingly unattainable (Intergovermental Panel on Climate Change (IPCC), report of Aug. 6, 2021). On Aug. 9, 2021 Boris Johnson, prime minister of the United Kingdom, declared that coal needs to be consigned to history to limit global warming. CO2 has an important social cost…

      • chapterNo Access

        Relationships between light-treated cultures and lactose content in yogurt

        The abilities of Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus to decrease lactose content in milk after different light treatments have been compared in this study. Each one of cultures was treated by visible daily light, linear non-coherent polarized light or kept in dark. After fermentation lactose concentration was measured by ultrasound milk analyzer Lacto Scan. Experimental results show the decrease of lactose concentration in a range of 37,5% - 40,35%, dependant to the treatments and durations. There are significant differences in lactose concentration (p < 0,01) by cultures treated 40, 50 and 60 minutes, in relation to the kind of treatments. Each one of treatments in duration 30 show no statistical differences in lactose concentration (p = 0,05). Diagram of experimental results presents a percent of decrease in lactose concentration as a logarithmic function of the energy impute in the case of linear non-coherent polarized light.

      • chapterOpen Access

        Light: A perfect probe for gravity

        In this talk the different possibilities offered by light (geometric effects, polarization effects, propagation delays and phase changes) for determining the local structure of space time, i.e., the gravitational field, in terms of the Riemann tensor, are discussed. Special attention is devoted to axially symmetric stationary gravitational fields. A description of the potentialities of ring lasers is presented, having direct reference to the GINGER project.

      • chapterNo Access

        Experimental Study on the Compression Performance of Ceramsite Fly Ash Haywire Concrete Hollow Brick

        Clay brick with continuous development of limitations, this paper mainly studies under the different design strength grade of lightweight ceramsite concrete hollow brick density and compressive performance of experimental result analysis, analyzes the development of various new building materials in China can adjust measures to local conditions to use a lot of industrial waste residue, waste and agricultural residues, etc., through processing and manufacturing ceramsite concrete hollow brick used in wall, for profit, thus victims of freshwater.

      • chapterNo Access

        IVR: Its Coherent and Incoherent Dynamics

        In this paper, we discuss the dynamics of intramolecular vibrational-energy redistribution (IVR) in two limits: the coherent and incoherent limits. These descriptions are introduced to account for experiments done in time and frequency domains. We present a more general model for IVR, namely the model of overlapping resonances, which describes coherence (quantum beats), congestion and nonexponentional decays.