Formation of larynx topographic-anatomic relations with neck organs and structures in the intermediate fetal period of ontogenesis

Objectivesto present topographic and anatomic characteristics of the larynx relationship with neck organs and structures in the intermediate fetal period of human ontogenesis. Material and methods.The study included 85 organocomplexes of the fetuses neck of both sexes, from the 14th to the 27th week of development. The study material was divided into 2 age periods: the first group fetuses aged 1420 weeks; the second group 2127 weeks. The classical morphological techniques were used: (macromicroscopic preparation, modified method of saw cuts according to N.I. Pirogov, histotopographic method). Results.Larynx syntopy with thyroid gland, cervical esophagus, thymus, submandibular glands was described in detail. Larynx skeletotopy with incisurae jugularis sterni, cervical vertebrae, hyoid bone, mandible was described quantitatively. Conclusion.The data, obtained as a result of the study, supplement the data on the topographic anatomy of larynx and some neck organs and structures in the prenatal period of human ontogenesis. The revealed formation features of larynx and other neck organs and structures topography can be used in the study of intravital anatomy

Magnetic structure and magnetocaloric properties of Ho(Co1-xFex)(2) quasibinary intermetallic compounds

AbstractA study of crystal and magnetic structures, heat capacity, magnetic and magnetocaloric properties of Ho(Co1-х Feх)2 (with increasing x from 0 to 0. 2) intermetallic compounds has been undertaken. Phase composition was controlled by X-ray diffraction analysis. Neutron diffraction experiment was performed at temperatures of 78 and 293K. Magnetic properties were measured within the temperature range 5÷325K in magnetic fields up to 70 kOe. It was shown that considerable maximum broadenings on the temperature dependence of magnetic entropy change is observed with iron concentration increase. The avarage magnetic moment of Ho ions in their sublattice decreases from 10μB for HoCo2 to 9μB for Ho(Co0.8Fe0.2)2 that can be connected with the existence of the umbrella-like (canting) magnetic structure in Ho-sublattice

Macroscopic anatomy of the fetal nasal cavity

Objectives to describe the macromicroscopic anatomy of the nasal cavity in the intermediate fetal period of human ontogenesis. Material and methods. The object of the study was horizontal histotopograms of the nose of 15 fetuses of both genders at the age of 1922 weeks of the intermediate fetal period of ontogenesis. The study used the method of macromicroscopic preparation, the modified method of saw cuts according to N.I. Pirogov, and the histotopographic method. Results. On the horizontal histotopographic sections the external nose was shaped like a triangle. The structures of the external nose were covered with skin soldered to the underlying tissues. In soft tissues, there was a large accumulation of arterial and venous vessels, nerves, and glands. In the intermediate fetal period, the nasal passages had the shape of a triangle, with the base turned to the nasal part of the pharynx. It was found that the anterior-posterior size of the nasal septum in fetuses of the intermediate fetal period was 14.054.34 mm, with a range of fluctuations from 5.75 to 19.85 mm. The anterior-posterior size of the nasal septum in female fetuses was greater than the anterior-posterior size of the septum of male fetuses. The value of the width of the nasal septum was the maximum in the lower third, and reached up to 2.540.67 mm. The narrowest part of the nasal septum was its middle third, the value was 1.630.47 mm. The areas of the nasal passages had no bilateral differences. Conclusion. In the intermediate fetal period there is the establishment of qualitative and quantitative macromicroscopic anatomy of the nasal cavity. All the main structures are determined: the nasal septum, nasal conchs, mucosa, and blood vessels. Sexual differences begin to form, and there are no bilateral differences. Quantitative characteristics of the structures of the nasal cavity in fetuses can serve as a justification for early surgical intervention in choanal atresia

Assessment of the impact of biotic factors on the sustainability of forest ecosystems

In the conditions of active development of the northern regions of Russia, the urgent task is not only strategic planning for the development of the resources of the north, but also a rational approach to the conservation of primary landscapes of ecosystems. Management of natural areas should be based on a risk-based approach that takes into account factors of biotic, abiotic and anthropogenic origin. The method of applying the Bayesian approach to assessing environmental risks is considered on the example of the forest ecosystem of the north of the Krasnoyarsk Territory. Graphical models of probability distribution take into account such elements of the system as the species composition of wood, the type of pest or disease of the forest as input data. An assessment of the probability of damage to forests showed that insect pests (Siberian silkworm, Ussuri polygraph) contribute to significant damage to forests. Economically valuable species of wood (larch, fir, cedar) are vulnerable to the impact of biotic factors. It is proposed to carry out sanitary felling as measures to prevent the death of the forest to strengthen control over the development of centers of biological threats

Magnetocaloric properties of Gd(Co1-xFex)2 compounds, with x ≤ 0.60

In this paper the results of specific magnetization and magnetocaloric effect (MCE) measurements for Gd(Co1-xFex)2 system upon the Co substitution by Fe for the x = 0 ÷ 0.60 range are presented. Phase composition was controlled by X-ray diffraction analysis. MCE has been studied within the temperature range of 300-850 K in magnetic fields up to 17 kOe by the magnetic entropy change calculation (ΔSm). It was found that in contrast to the previously studied R(Co-Fe)2 compounds where R = Dy, Ho, Er, an ordinary symmetrical peak of ΔSm(T) in the vicinity of TC is observed for presented samples. Additionally, the MCE comparison of Gd(Co0.88Fe0.12)2 with that for the isostructural Gd(Ni0.88Fe0.12)2 compound having a plateau-like ΔSm temperature dependence is given. The obtained results are discussed

Effect of alloying elements (Zr, Hf, Co), heat and mechanical treatment conditions on the phase composition and magnetic properties of SmFe11Ti compounds with ThMn12 structure

The results of thermomagnetic, metallographic and X-ray diffraction phase analysis as well as the measurements of specific magnetization (σs), Curie temperature (TC), coercive force (HC) of (Sm,M)(Fe,M)12-xTix alloys samples, where M = Zr, Hf, Co with the ThMn12 main phase structure (1-12) are presented. The effect of the annealing temperature and the cooling rate on the formation of 1-12 phase and its magnetic properties, including the effect of high-energy milling on the magnetic hysteresis properties and alloys structure are described. It was found that the highest magnetic characteristics such as σs = 112.6 emu/g and TC = 600 ºC are attained in the (Sm0.8Zr0.2)(Fe0.75Co0.25)11.4Ti0.6 alloy after its annealing at 1050 °C and rapid cooling. It is noted that a mechanical milling of the alloy leads to 1-12 phase amorphization which accompanied by an α-(Fe) or metal Co phases impurity formation

Asian educational discourse: construction of ontological security

This article considers the problem of ontology security through Asian educational discourse, which is structurally determined by the process of moral self-improvement. Considered are trends in improving the management of educational system by developing the culture of quality, which is considered as the next stage of the Asian education systems development after the “quality of education” stage. We suggest an approach for assessing the vitality of educational process and its product based on monitoring trainees’ aptitudes system and school capabilities in developing and maintaining this system. In this study we refer to the concept of vitality and viability when describing the general theory of viability in connection with the core principles of Asian educational discourse. We outline main trends in the development of modern educational system in Asian university given the process of globalization and its impact on educational reforms in the Asia-Pacific region. Thus, the category of education quality in Asian system of higher education and narrative monitoring of Chinese students’ cognitive structures viability at Altai State University are introduced