TECHNOLOGY FOR CREATING SOLAR CELLS SENSITIZED WITH ORGANIC DYES

Recently, a lot of attention has been paid to alternative energy sources. Research is being actively conducted in the field of converting solar energy into electricity, which involves the development of cheap and efficient solar cells. This work is devoted to the study of dye-sensitized solar cells

Evidence for early life in Earth’s oldest hydrothermal vent precipitates

Although it is not known when or where life on Earth began, some of the earliest habitable environments may have been submarine-hydrothermal vents. Here we describe putative fossilized microorganisms that are at least 3,770 million and possibly 4,280 million years old in ferruginous sedimentary rocks, interpreted as seafloor-hydrothermal vent-related precipitates, from the Nuvvuagittuq belt in Quebec, Canada. These structures occur as micrometre-scale haematite tubes and filaments with morphologies and mineral assemblages similar to those of filamentous microorganisms from modern hydrothermal vent precipitates and analogous microfossils in younger rocks. The Nuvvuagittuq rocks contain isotopically light carbon in carbonate and carbonaceous material, which occurs as graphitic inclusions in diagenetic carbonate rosettes, apatite blades intergrown among carbonate rosettes and magnetite–haematite granules, and is associated with carbonate in direct contact with the putative microfossils. Collectively, these observations are consistent with an oxidized biomass and provide evidence for biological activity in submarine-hydrothermal environments more than 3,770 million years ago

Morphologic characteristics of the biological fluids in abnormal uterine bleeding

«Litos-system» - as a method of laboratory study of menstrual discharge is up till now poorly studied, non-invasive, promising method of early diagnosis of female reproductive organs. This study allowed us to obtain an integrated assessment of both systematic and local homeostasis in abnormal uterine bleeding in women of reproductive age

Chimneys in Paleozoic massive sulfide mounds of the Urals VMS deposits: Mineral and trace element comparison with modern black, grey, white and clear smokers

In the Urals, a wide range of well-preserved chimneys are found in VMS deposits, which are associated with ultramafic (Atlantic type: Dergamysh), mafic (Cyprus type: Buribay), bimodal mafic (Uralian type: Yubileynoye, Sultanovskoye, Yaman-Kasy, Molodezhnoye, Uzelga-4, Valentorskoye) and bimodal felsic (Kuroko or Baymak type: Oktyabrskoye, Tash-Tau, Uselga-1, Talgan, Alexandrinskoye) sequences. Chimneys have also been found in the Safyanovskoye deposit (Altay type) that is hosted by intercalated felsic lavas and carbonaceous shales. A combination of geological, mineralogical and trace element data provide a general outline for comparison between chimneys from the Urals deposits and modern vent sites. The chimneys from the Dergamysh deposit show a broad affinity with those from the Rainbow and other vent sites associated with serpentinites of the Mid-Atlantic Ridge. The chimneys from the Buribay deposit are similar to the black smokers of the EPR vent sites including the scarcity of rare minerals. The chimneys from the Urals type of the VMS deposits show some similarities with grey smokers from the Brother Volcano and PACMANUS sites. The chimneys from the Baymak type of the VMS deposits resemble grey and white smokers of the PACMANUS and grey smokers of the Suiyo vent sites. The chimneys from the Safyanovskoye deposit are similar to the black and clear smokers from the Okinawa Trough. Mineral assemblages are controlled by the combination of host rock composition and physico-chemical conditions of the ore-forming processes.Amount of colloform pyrite, isocubanite and pseudomorphic pyrite and marcasite after pyrrhotite decreases in the chimneys across the range from ultramafic and mafic to felsic-hosted deposits and is concomitant with increase in the contents of sphalerite, galena, bornite, fahlores, native gold and barite across this range. The chimneys from the Urals type contain abundant tellurides and sulfoarsenides, while these minerals are rare (except for hessite) in the Baymak type deposits. In the same range, the buffering capacity of host rocks decreases in contrast to the increase in ƒS2 and ƒO2. With the exception of the Safyanovskoye deposit, trace element assemblages in chalcopyrite vary to reflect the host rock: ultramafic (high Se, Sn, Co, Ni, Ag and Au) → mafic (high Co, Se, Mo and low Bi, Au and Pb) → bimodal mafic (high Te, Au, Ag, Bi, Pb, Co, moderate Se, and variable As and Sb) → bimodal felsic (high As, Sb, Mo, Pb, moderate Bi, and low Co, Te and Se). In sphalerite of the same range, the contents of Bi, Pb, Ag, Au and Sb increase versus Fe, Se and Сo. The variations in trace elements in colloform pyrite coincide with these changes. The specific mineral changes in the local ranges from Cu- to Zn-rich chimneys in each VMS deposit are similar to the general changes in the range of host rock classes of the deposits. However, the local T, ƒS2 and ƒO2 changes can broadly be interpreted in terms of contribution of variable oxygenated cold seawater to the subseafloor and seafloor hydrothermal processes

COMPREHENSIVE REHABILITATION OF DISABLED CHILDREN WITH BILATERAL THROUGH-CLEFT LIP AND PALATE IN KRASNODAR REGION

Aim. This study was designed to evaluate the immediate and long-term results of the Protocol of complex rehabilitation of 15 Kubanskij nauchnyj medicinskij vestnik 2018; 25 (5) children with bilateral through-cleft lip and palate (BTCLP) developed by the Department of pediatric dentistry, orthodontics and maxillofacial surgery of KSMU.Materials and methods. There was conducted the evaluation of the immediate and long-term results of the complex treatment of 25 patients with BTCLP aged 0 to 18 years according to the Protocol developed by the Department of pediatric dentistry, orthodontics and maxillofacial surgery of KSMU.Results. There was carried out a detailed analysis of the results of the application of the function-forming plate (FFP) in patients with BTCLP aged 0 to 1 year. The results of the models measurement in dynamics showed a significant growth and development of the upper jaw, the approximation of the shape and size of the upper alveolar arc to the norm, reducing the distance between its fragments to the minimum. There was established that long-term gradual orthodontic treatment provides conditions for physiological growth and development of the facial skeleton and for the formation of physiological occlusion in children with BTCLP. The usage of gentle methods of uranoplasty reduces the risk of dentoalveolar anomalies in children with BTCLP. The complex of therapeutic measures and terms of surgical intervention should be planned individually. The elimination of the defects of the alveolar process of the upper jaw by the method of autoosteoplasty is a necessary step in the complex rehabilitation of children with BTCLP during the periods of changing and forming permanent dentition. The planning of the stage of prosthetics of patients with BTCLP is individual and involves the creation of conditions for fullfledged functions of chewing, swallowing and speech, and it is recommended to carry it out with the help of modern aesthetic constructions that ensure the preservation of the results of the complex, including orthodontic, treatment.Conclusion. The analysis of the photographs of the face, TRG, CT and jaws diagnostic models obtained during the treatment of children and adolescents with congenital cleft lip and palate confirms the high morphofunctional and aesthetic result of the application of the developed at the Department of pediatric dentistry, orthodontics and maxillofacial surgery of KSMU Protocol of comprehensive rehabilitation of children with BTCLP