scholarly journals Use of Methods of Electronic Microscopy, Mass-Spectrometry and Roentgenospectral Electronic Probe Micro-Analyzer in Ecological and Analytical Studies. Elemental Composition of Blue Micro-Particles of Unknown Nature Observed in Suspended Substance of Lake Baikal

2019 ◽  
Vol 29 (4) ◽  
pp. 533-544
Author(s):  
Olga Belozerova ◽  
Viktor Egorov ◽  
Aleksandr Chebikin ◽  
Igor Mizandrontsev ◽  
Tatiana Shishlyannikova ◽  
...  
Keyword(s):  
Blue Color ◽  
Spray Application ◽  
Nearshore Zone ◽  
Baikal Lake ◽  
Electronic Microscopy ◽  
Micro Particles ◽  
Hard Particles ◽  
Mineral Acids ◽  
Electronic Probe ◽  
Suspended Substance

During the period from April till June, 2018, suspended substance of Baikal Lake water from depths up to 25 meters in various distance from the shore (up to 4,000 m) showed presence of hard particles of blue color in size up to 900 mkm of unknown nature with maximum numbers at the nearshore zone, resistant to mineral acids and combustion. The analysis using methods of electronic microscopy with spray application of conducting golden coating, field desorption with inductively connected plasma (mass-spectroscopy) roentgenospectral electronic probe micro-analyzer, along with investigation of the surfaces of the objects studied and the components distributed in them, showed a set of 68 elements entering the composition of the particles. The major composition is marked for Ti, Ca and Si. Comparatively high composition is found for high-density metals: Zn, Pb, Sb, Nb, Cu, As. Suppositions are made about the anthropogenic nature of the blue particles — in forms of products of agglomerating titanium with fuliginous phase, as well as in composition of sorbents on the basis of compounding of titanium and ship paints.

scholarly journals Composition of Suspended Micro-particles in the Air of Khabarovsk

10.12737/314 ◽  
2013 ◽  
Vol 2 (2) ◽  
pp. 10-14 ◽  
Author(s):  
Голохваст ◽  
Kirill Golokhvast ◽  
Алейникова ◽  
E. Aleynikova
Keyword(s):  
Airborne Particles ◽  
Anthropogenic Load ◽  
Quantitative Composition ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Research Results ◽  
Qualitative And Quantitative ◽  
Micro Particles ◽  
The City

The research results of nano- and micro-particles of atmospheric suspensions contained in the snow of Khabarovsk during the winter of 2011/2012 are presented in this paper. The use of laser granulometry and scanning electronic microscopy for researching of qualitative and quantitative composition of precipitation suspensions is shown. The distribution of airborne particles with different sizes is revealed in the city parts distinguished by anthropogenic load.

Wind-Induced Waves and Currents in a Nearshore Zone

1997 ◽  
Author(s):  
Nobuhiro Matsunaga ◽  
Misao Hashida ◽  
Hiroshi Kawakami
Keyword(s):  
Nearshore Zone ◽  
Waves And Currents

New Structure of CTAB Templated Silica Films as revealed by GISAXS coupled to HRTEM

2000 ◽  
Vol 628 ◽  
Author(s):  
Sophie Besson ◽  
Catherine Jacquiod ◽  
Thierry Gacoin ◽  
André Naudon ◽  
Christian Ricolleau ◽  
...  
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Grazing Incidence ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
Electronic Microscopy ◽  
Silica Films ◽  
X Ray ◽  
X Ray Scattering ◽  
Hexagonal Arrangement ◽  
Spherical Micelles

ABSTRACTA microstructural study on surfactant templated silica films is performed by coupling traditional X-Ray Diffraction (XRD) and Transmission Electronic Microscopy (TEM) to Grazing Incidence Small Angle X-Ray Scattering (GISAXS). By this method it is shown that spin-coating of silicate solutions with cationic surfactant cetyltrimethylammonium bromide (CTAB) as a templating agent provides 3D hexagonal structure (space group P63/mmc) that is no longer compatible with the often described hexagonal arrangement of tubular micelles but rather with an hexagonal arrangement of spherical micelles. The extent of the hexagonal ordering and the texture can be optimized in films by varying the composition of the solution.

Visual Evoked potential signal processing and analysis for normal and galucomic eyes

2015 ◽  
Vol 8 (2) ◽  
pp. 2106-2121
Author(s):  
Hamed Ibrahem Abdelkader ◽  
Mona Abdelkader ◽  
Mohammed Kabeel ◽  
Malak Alya
Keyword(s):  
Evoked Potentials ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Optic Tract ◽  
Pattern Reversal ◽  
Blue Color ◽  
Check Size ◽  
Retinal Stimulation ◽  
Normal Individuals ◽  
Visual Evoked

Visual evoked potentials (VEPS) are obtained from optic tract by recording the evoked potentials generated by retinal stimulation. The flash VEP (FVEP) is used less frequently than pattern reversal VEP (PRVEP) because; it shows great variation in both latency and amplitude. The present study was undertaken to evaluate the effect of change of wavelength of flash and change of check size on the parameters of visual evoked potential (amplitude and latency) in normal individuals and glaucoma patients. The group of healthy subjects in the age of 20-45 years while the group of glaucoma subjects where  in the age of 25-50 years.  The two groups were exposed to flash VEP with white light and blue color and they also were exposed to checks subtending a visual angles of 15, 30,60 and 120 minutes of arc. The measured data were statistically analyzed and summarized by histograms. The interindividual and intraindividual in latencies and amplitudes for FVEP were assessed using  the coefficient of variation (COV). In conclusion, monochromatic flash VEP was preferred than white as there were minimal inter and intra individual variation of latencies and amplitudes. The most preferred check size in PRVEP was 120' for  the two groups.  

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