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Scientists find a way to detect the spectral signals of amyloid fibrils

Researchers from St Petersburg University have created a new theory of diffusion NMR experiments to study amyloid fibrils. Fibrils are one of the key factors behind various forms of dementia, including Alzheimer s disease. The researchers showed that using a diffusion filter it is possible to separate the spectral signals of fibrils and other components of the amyloidogenic sample and obtain their individual spectra, which has been considered impossible for a long time.

Sankt peterburgMonte carloSergey inge vechtomovNikolai skrynnikovSt petersburg universityUniversity department of geneticsOxford universityLaboratory at st petersburg universityMedicine healthAlzheimers diseaseமான்டே கார்லோஸ்டம்ப் பீட்டர்ஸ்பர்க் பல்கலைக்கழகம்ஆக்ஸ்ஃபர்ட் பல்கலைக்கழகம்மருந்து ஆரோக்கியம்

New algorithm to ensure more accuracy in studying the interior of the Earth

Credit: SPbU An essential preliminary to building and construction or resource extraction is studying the geological structure of the site. One of steps of this process is geophysical investigation. This provides a continuous overview of the geological horizons rather than just data on points: boreholes. The standard methods of geophysics help successfully solve this problem in comparatively simple conditions. Yet the classical direct current methods may lead to serious inaccuracy if we have to investigate geologically complex structures with thin layers of sandy and clayey soils. Among the most popular methods in geoelectrical survey is electrical resistivity tomography (ERT). It is a geophysical method for imaging subsurface structures by electrical resistivity measurements made at the surface or in boreholes. It allows geologists to see various rock formations as they have different resistivity. Yet the electrical resistivity tomography can also result in serious inaccuracy in

Sankt peterburgAltayskiy krayArseny shlykovUniversity of cologne germanyInstitute of geophysicsSt petersburg universityIndian institute of technology kharagpurLomonosov moscow state universityEarth sciencesIndian instituteTechnology kharagpurபல்கலைக்கழகம் ஆஃப் கொலோன் ஜெர்மனிநிறுவனம் ஆஃப் புவி இயற்பியல்ஸ்டம்ப் பீட்டர்ஸ்பர்க் பல்கலைக்கழகம்இந்தியன் நிறுவனம் ஆஃப் தொழில்நுட்பம் கரக்புர்பூமி அறிவியல்

New type of placental structure discovered in animals

New type of placental structure discovered in animals The Cyclostomata is an ancient group of aquatic colonial suspension-feeders from the phylum Bryozoa. The fact that they have unique placentae has been discovered by researchers at St Petersburg University and the University of Vienna. The coenocytes, i.e. large multinucleate cell structures, originate via nuclear multiplication and cytoplasmic growth among the cells surrounding the early embryo. Interestingly, the coenocytes are commonly found among fungi and plants, yet are quite rare in animals. It is the first time coenocytes have been discovered in placenta. Biologists are well aware that the cells of the living organisms are incredibly different in the way that they behave. They may happen to form a multinucleate structure resulting from cell fusion, i.e. so-called syncytium with a single membrane. Such behavior ensures nutrient circulation with no resources and time spent on transporting between the cells.

Sankt peterburgUliana nekliudovaAndrew ostrovskyWhite seaEmily hendersonSt petersburg universityDepartment of invertebrate zoologyUniversity of viennaInvertebrate zoologyMarine biological stationLight microscopyஆண்ட்ரூ ஒஸ்திறோவ்ஸ்கிவெள்ளை கடல்எமிலி ஹென்டர்சன்ஸ்டம்ப் பீட்டர்ஸ்பர்க் பல்கலைக்கழகம்பல்கலைக்கழகம் ஆஃப் வியன்னா

Biologists discover a new type of placental structure in animals

E-Mail IMAGE: The histological section of a gonozooid that is filled with larvae and embryos embedded in the syncytial placenta (light microscopy). view more Credit: SPbU The Cyclostomata is an ancient group of aquatic colonial suspension-feeders from the phylum Bryozoa. The fact that they have unique placentae has been discovered by researchers at St Petersburg University and the University of Vienna. The coenocytes, i.e. large multinucleate cell structures, originate via nuclear multiplication and cytoplasmic growth among the cells surrounding the early embryo. Interestingly, the coenocytes are commonly found among fungi and plants, yet are quite rare in animals. It is the first time coenocytes have been discovered in placenta.

Sankt peterburgUliana nekliudovaAndrew ostrovskyWhite seaSt petersburg universityUniversity of viennaInvertebrate zoologyMarine biological stationDevelopmental reproductive biologyMarine freshwater biologyஆண்ட்ரூ ஒஸ்திறோவ்ஸ்கிவெள்ளை கடல்ஸ்டம்ப் பீட்டர்ஸ்பர்க் பல்கலைக்கழகம்பல்கலைக்கழகம் ஆஃப் வியன்னாகடல் உயிரியல் நிலையம்

New breed of Battery can charge 10 times faster than Lithium Ion

New breed of Battery can charge 10 times faster than Lithium Ion
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Sankt peterburgOleg levinSt petersburg universityஓல்க் லெவின்ஸ்டம்ப் பீட்டர்ஸ்பர்க் பல்கலைக்கழகம்