Anisakis simplex and its influence on the human health

Fish that are usually carriers of A. simplex are: salmon, herring, anchovies and mackerel. Having gotten in the gastrointestinal tract the parasite is in its third phase of development (L3), but eventually it reaches the fourth phase of its development (L4).The progression of the life cycle of A. simplex after this phase in humans is impossible. A few hours to a week after eating the fish contaminated with A. simplex, a person develops symptoms of anisakiasis, namely nausea, vomiting, severe abdominal pain and diarrhea. A. Simplex can also lead to the development of severe allergic reactions and changes in the gut similar to Crohn‘s disease.The disease is treated with anti-parasitic drugs (albendazole) or by surgical removal of the larvae. Prevention includes thermal processing of food at temperatures above 60 ° C , freezing below - 20ºC and avoiding consumption of raw fishThe increasing trend for consumption of sushi (raw fish) in Bulgaria , predisposes to the appearance of cases of anisakiasis. We must therefore consume fish that is cooked

Quantitative Structure–Property Relationship Studies on Ostwald Solubility and Partition Coefficients of Organic Solutes in Ionic Liquids

Article discussing quantitative structure-property relationship studies on Ostwald solubility and partition coefficients of organic solutes in ionic liquids

Magneto-optical harmonic susceptometry of superparamagnetic materials

We describe a technique to optically characterize superparamagnetism. Faraday rotation measurements are performed on a superparamagnetic nanocomposite using small alternating current magnetic fields. The superparamagnetism of the iron oxide nanoparticles causes signals at the uneven harmonics of the magnetic field frequency. These signals provide information on the magnetic moment of the superparamagnetic nanoparticles. Dia- and paramagnetism do not cause signals at higher harmonics, resulting in a high sensitivity to superparamagnetism, even in samples with large dia- or paramagnetic contributions. This technique provides a rapid, economical method to characterize superparamagnetism in composite samples not easily accessible by other techniques.status: publishe

Electromagnetically Induced Transparency and optical pumping processes formed in Cs sub-micron thin cell

International audienceThe Electromagnetically Induced Transparency (EIT) effect in a Λ-system formed by Cs atoms (6S1/2 − 6P3/2 − 6S1/2) confined in an extremely thin cell (ETC) (atomic column thickness L varies in the range of 800 nm -3 µm is studied both experimentally and theoretically. It is demonstrated that when the coupling laser frequency is in exact resonance with the corresponding atomic transition, the EIT resonance parameters weakly depend on L, which allows us to detect the effect at L = λ = 852 nm. EIT process reveals a striking peculiarity in case of the coupling laser detuned by Δ from the atomic transition, namely the width of the EIT resonance rapidly increases upon an increase in Δ (an opposite effect is observed in centimeter-scale cells). The strong broadening of the EIT resonance for large values of detunings Δ is caused by the influence of atom-wall collisions on dephasing rate of coherence. The influence of the coupling laser on the velocity selective optical pumping/saturation resonances formed in ETC has been also studied. The theoretical model well describes the observed results

Novel Carboxamides as Potential Mosquito Repellents

A model was developed using 167 carboxamide derivatives, from the United States Department of Agriculture archival database, that were tested as arthropod repellents over the past 60 yr. An artificial neural network employing CODESSA PRO descriptors was used to construct a quantitative structure-activity relationship model for prediction of novel mosquito repellents. By correlating the structure of these carboxamides with complete protection time, a measure of repellency based on duration, 34 carboxamides were predicted as candidate mosquito repellents. There were four additional compounds selected on the basis of their structural similarity to those predicted. The compounds were synthesized either by reaction of 1-acylbenzotriazoles with secondary amines or by reaction of acid chlorides with secondary amines in the presence of sodium hydride. The biological efficacy was assessed by duration of repellency on cloth at two dosages (25 and 2.5 mol/cm2) and by the minimum effective dosage to prevent Aedes aegypti (L.) (Diptera: Culicidae) bites. One compound, (E)-N-cyclohexyl-N-ethyl-2-hexenamide, was superior to N,N-diethyl-3-methylbenzamide (deet) at both the high dosage (22 d versus 7 d for deet) and low dosage (5 d versus 2.5 d for deet). Only one of the carboxamides, hexahydro-1-(1-oxohexyl)-1H-azepine, had a minimum effective dosage that was equivalent or slightly better than that of deet (0.033µmol/cm2 versus 0.047 µmol/cm2)

Dataset for "Atomic dispensers for thermoplasmonic control of alkali vapor pressure in quantum optical applications"

This dataset contains data supporting the results presented in the paper "Atomic dispensers for thermoplasmonic control of alkali vapor pressure in quantum optical applications". It includes the data used to plot each figure, together with the raw oscilloscope data in .csv format, associated with this publication. This study uses plasmonic nanoparticles as an alternative to the conventional means, such as bulk heating or laser desorption to convert light into localized thermal energy and to achieve optical depths in warm vapors, which was proven to produce far improved results. The response is over a thousand times faster than previously observed corresponding to a ~16 times increase in vapour pressure in less than 20 ms., with possible reload times much shorter than an hour. The results enable robust and compact light-matter devices, such as efficient quantum memories and photon-photon logic gates, in which strong optical nonlinearities are crucial. Supplementary Information of the publication contains more details on the methodology and data preparation.Full details of the methodology may be found in the supplementary information of the associated paper. .CSV files were recorded with an oscilloscope using the setups in Figures 2 and 6a of the paper. Extinction spectra were recorded with a commercial Applied Photophysics Chirascan. All spectra were recorded over the range of 300 nm – 1100 nm with a resolution of 1 nm. AFM profile was obtained with a Multimode Scanning Probe Microscope (Veeco, Plainview, NY) with a Nanoscope IIIA controller in contact mode in ambient conditions.Full details of how the data were processed may be found in the supplementary information of the associated paper