Study Of Morphometric Characteristics Research Articles

Гидроакустическая оценка условий нерестовых миграций рыб на примере реки Прохладной Калининградской области

The paper presents the results of assessing the conditions of spawning migrations of fish in the section of the Prokhladnaya River by conducting hydroacoustic studies of the topography of its bottom. This reservoir is a water body of fishery status of the highest category and ensures the reproduction of anadromous fish species living in the Baltic Sea (salmon, trout, lamprey), as well as important commercial fish species of the Kaliningrad (Vistula) Bay (bream, pike perch, roach, smelt, silver bream, burbot and etc.). The study of morphometric characteristics was carried out using the AsCor software and hardware complex by obtaining spatially distributed depth values in the study area and subsequent construction of a bottom surface model. In the course of the studies carried out, a method for planning a hydroacoustic survey rote on water bodies was developed, a model of the relief of the bottom of this water body was obtained in the form of a regular matrix of depth values, on the basis of which a longitudinal profile of the Prohladnaya River was built. The results of the work made it possible to give a general description of the channel in the study area, as well as to determine the presence of a shoal up to 250 meters long in its mouth part, which has a negative impact on the conditions of spawning migrations of fish.

Morphometric characteristics of the structural components of the intervertebral disc in rats at different times of the experimental opioid exposure and after its withdrawal

Background. The world and domestic literature from time to time report about the problems of uncontrolled drug abuse. This problem is associated not only with the negative impact on the morphological structure, but also is a serious factor which, if it has been exposing for a long time, leads to disability and death. Despite a significant number of studies in this area, the problem of changes in the morphometric parameters of the intervertebral disc’s structural components under chronic exposure of opioid agents still remains unresolved. That is why the study of morphometric characteristics of the intervertebral disc’s structural components under experimental opioid exposure will be interesting for both - morphologists and practical traumatologists. Objective. To study the morphometric parameters of the structural components of the intervertebral disc in rats at different times of the experimental opioid exposure and after its withdrawal. Methods. The objects of the study were 61 mature outbred male rats, weight - 80-135g, age - 4.5-7.5 months. Animals were injected with nalbuphine intramuscularly once daily (at 10-11 am) for 42 days. Histological specimens were stained with alcyan blue (for the study of the collagen fibers thickness of the anterior and posterior longitudinal ligaments) and PAS-reaction (for the study of the gelatinous nucleus and its capsule thickness). For measurements of collagen fiber thickness, were taken images at x100 magnification, for measurements of the gelatinous nucleus and its capsule thickness - at x40 magnification. Measurements were performed with ImageJver software. 1.51 using the tool "straight" for linear measurements. Results. Thus, changes in the collagen fibers thickness of the anterior and posterior longitudinal ligaments during the experiment were uneven and had different tendencies. The thickness of the posterior longitudinal fibers changed mostly within the central trend of the control group with a significant decrease only at the 2nd, 3rd, and 4th weeks. However, more significant, as for pathogenetic changes, was a sharp decrease in the number of fibers thicker than 25 μm in animals of the experimental group after 2 weeks of the study, and the maximum thickness at 5th and 6th week was only 31.41 μm and 35.24 μm whereas the maximum thickness of the control group was 81.48 μm. In the withdrawal group, only a decrease in sites with nuclear edema can be considered positive, which is displayed by morphometrical decrease in the maximum value, but the central trend remains much lower than in the control group, which also indicates the predominance of decompensatory changes. Conclusion. During the whole experiment, we observed similar changes in the nucleus capsule thickness: non-systemic fluctuations of the central parameters ​​up to the 5th week and a sharp decompensation at the 6th week, which was manifested by a sharp decrease in thickness. Simultaneously, we observed numerous sites of edema and thickening by more than 100 μm on the 2nd week. Despite a general decrease in median and quartile at this time, such sites were also noted at the 6th week. Thickness of the nucleus capsule in the withdrawal group did not demonstrate significant dynamics and remained similar to those at the 6th week. Although, this can be interpreted as the stabilization at a certain level without further negative dynamics.

Morphometric Characteristics of the Portal Vein According to Multispiral Computed Tomography

The article discusses the variability of the linear dimensions of the portal vein depending on gender and age. In modern foreign and Russian literature, there is no uniform information about the variant portal vein anatomy. Data on the extreme forms and on the range of anatomical differences in the portal vein vary considerably. All this requires the need for a more detailed study of the morphometric characteristics of the portal vein branch. Computed tomography, in contrast to dissection on a corpse, allows an in vivo study of various morphometric characteristics of the portal vein.The aim of the study is to identify patterns of variability in the linear dimensions of the portal vein in persons of different sex and age.Material and methods. The study material consisted of multispiral computed tomography images of the abdominal cavity with contrast enhancement taken in 100 patients. The study included results of 56 men and 44 women, divided into 4 age groups: 1) first mature age, 2) second mature age, 3) the elderly, 4) the senile. The length of the portal vein was measured between the angle formed at the junction of the superior mesenteric and splenic veins and the angle formed by the branches of the portal vein at the hepatic hilum. The diameter of the vessel was measured at the midpoint of the distance between the proximal and distal points.Results. The length of the portal vein in the general sample was 66.45±8.49 mm, and its diameter was 11.84±1.93 mm. In women, the length of the portal vein was 64.37±6.6 mm, and its diameter was 11.33±1.83 mm, respectively. In men, both the length and diameter of the black vein were significantly greater than in women and constituted 68.09±9.4 mm and 12.24±1.91 mm, respectively. No statistically significant correlation of the studied parameters with age was detected.

A preliminary study of morphometric characteristics and reproductive potential of the fish species Cottus gobio Linnaeus, 1758 on selected sites from Bosnia and Herzegovina

A preliminary study of morphometric characteristics and reproductive potential of the fish species Cottus gobio Linnaeus, 1758 on selected sites from Bosnia and Herzegovina

Вивчення морфометричних характеристик колагенових волокон на ранніх термінах субкутанної імплантації пористого волокнистого матриксу

Вивчення морфометричних характеристик колагенових волокон на ранніх термінах субкутанної імплантації пористого волокнистого матриксу

Вивчення морфометричних характеристик колагенових волокон після двохмісячної субкутанної імплантації пористого волокнистого матриксу

Вивчення морфометричних характеристик колагенових волокон після двохмісячної субкутанної імплантації пористого волокнистого матриксу

Comparative Study of Morphometric Characteristics of Rohu and Jayanti Rohu Under Captive Conditions in Tarai Region of Uttarakhand

Comparative Study of Morphometric Characteristics of Rohu and Jayanti Rohu Under Captive Conditions in Tarai Region of Uttarakhand

우리나라 산지의 형태적 특성과 산지분류에 관한 연구

우리나라 산지의 형태적 특성과 산지분류에 관한 연구