scholarly journals Meadows of the Crimean Yaila

Author(s):  
A. R. Nikiforov

A comparative analysis of the vegetation composition in the meadow steppe community and the meadow in the middle in a karst sinkhole was made. The appearance of the meadow, which is formed by its coenogenous elements, is contrasted with the steppe. The compositions of the elements in two neighboring coenoses are also not similar. Obviously, the examined communities have different genesis. These differences are due to environmental conditions of karst depression. Yaila meadows are here indigenous primary vegetation of azonal origin.

2015 ◽  
Vol 12 (15) ◽  
pp. 12091-12119 ◽  
Author(s):  
E. Rivkina ◽  
L. Petrovskaya ◽  
T. Vishnivetskaya ◽  
K. Krivushin ◽  
L. Shmakova ◽  
...  

Abstract. A comparative analysis of the metagenomes from two 30 000 year-old permafrost samples, one of lake-alluvial origin and the other from late Pleistocene Ice Complex sediments, revealed significant differences within microbial communities. The late Pleistocene Ice Complex sediments (which have been characterized by the absence of methane with lower values of redox-potential and Fe2+ content) showed both a low abundance of methanogenic archaea and enzymes from the carbon, nitrogen and sulfur cycles. The metagenomic and geochemical analyses described in the paper provide evidence that the formation of the late Pleistocene Ice Complex sediments likely took place under much more aerobic conditions than lake-alluvial sediments.


2021 ◽  
Vol 265 ◽  
pp. 06005
Author(s):  
Мarya Danacheva ◽  
Viktor Glebov ◽  
Vladimir Torshin ◽  
Vasily Shevtsov ◽  
Dilyara Efremova ◽  
...  

The presented empirical study assesses the state of the cardiovascular system of Moscow schoolchildren living in different environmental conditions. 233 practically healthy schoolchildren (109 boys and 124 girls aged 11.4 to 12.6 years) took part in the comprehensive study of HRV and the state of adaptive processes when living in different ecological conditions of the capital megapolis. On the basis of different ecological and social conditions the schoolchildren were divided into 4 compared groups. The comparative analysis of the obtained HRV data of schoolchildren of different groups showed differences in the adaptation processes and in the indices of the wave activity of the sympathetic and parasympathetic departments of the ANS.


2020 ◽  
Vol 28 (6) ◽  
pp. 1445-1453
Author(s):  
Aure Durbecq ◽  
Renaud Jaunatre ◽  
Elise Buisson ◽  
Alexandre Cluchier ◽  
Armin Bischoff

2022 ◽  
Vol 52 (1) ◽  
Author(s):  
Andrzej Zybert ◽  
Krystian Tarczyński ◽  
Halina Sieczkowska ◽  
Krzysztof Młynek

ABSTRACT: The objective of this study was the comparative analysis of selected attributes of nutritional and technological quality of pork from Naïma and DanBred gilts mated with P-76 boars. The research was carried on 50 pigs (25 in each group) reared under the same environmental conditions and slaughtered at about 115±5.0 kg. Both analyzed crossbreds populations were characterized by overall good nutritional and technological quality. However the loins from DanBred×P-76 compared with those from Naïma×P-76 had significantly greater glycogen and less lactate concentration in early post mortem period, higher pH at all measurement points (besides no statistical differences in pH measured 2 hours post mortem), lower thermal drip and drip loss measured 96 and 144 hours post mortem and lower lightness (except no differences measured 48 hours post mortem). Additionally loins from DanBred×P-76 contained more protein and less water. No statistical differences in IMF content between both analysed groups were noted (their average values were below 2%). Aforementioned may suggest that crossing both Naïma and DanBred hybrids with P-76 boars may not improve IMF content or increase marbling scores to the levels preferred for culinary purposes.


2012 ◽  
Vol 4 (2) ◽  
pp. 147-155
Author(s):  
Mariana Baraquet ◽  
Pablo Raul Grenat ◽  
Nancy Edith Salas ◽  
Adolfo Ludovico Martino

Las diferencias fenotípicas intraespecíficas entre poblaciones separadasgeográficamente es común entre los anfibios anuros. En el presentetrabajo se realiza una caracterización morfométrica de Hypsiboascordobae, con el objetivo de estudiar la variación geográfica a lo largode la distribución de la especie. Se midieron 15 variables un totalde 86 individuos, pertenecientes a seis localidades de las provinciasde Córdoba y San Luís. Se observó dimorfismo sexual en diez de lasvariables. El análisis comparativo mostró diferencias significativasentre poblaciones, y el análisis discriminante mostró altos porcentajesde clasificación (87,50%). Ocho variables morfométricas mostraronrelación significativa y positiva con la latitud; mientras que diez variablesmostraron relación significativa y positica con la altitud. Sin embargo, enambos casos las correlaciones entre las distancias morfométricas y laslatitudinales/altitudinales no resultaron significativas (Test de Mantel).Esta variación geográfica en la morfometría de la especie puede debersea diferencias ambientales, o podrían deberse también a la edad de losindividuos. Por lo tanto, estos datos podían ser complementados conestudios relacionados directamente a las condiciones ambientales decada localidad, como así también estudios de esqueletocronología quepermitan determinar la edad de los individuos.ABSTRACTMorphometric differentiation and geographic variation amongpopulations of Hypsiboas cordobae (Anura: Hylidae). Intraspecificphenotypic differentiation among geographically separatedpopulations is common in anurans. We performed morphometricanalyses of the endemic frog Hypsiboas cordobae in order to assess thegeographic variation of morphometric variables along of distribution ofthe species. We measured 15 morphometric variables on 86 individualsfrom six localities of Córdoba and San Luís provinces. We foundsexual dimorphism in ten variables. The comparative analysis showedsignificant differences between populations and discriminant analysesshowed high percentages of classification (87,50%). Eight morphometricvariables showed positive correlation with latitude; and ten variablesshowed positive correlation with altitude. However, the correlationsbetween morphometric distances and latitudinal/altitudinal were notsignificant. This geographic variation in the morphometry of the speciesmay be due to environmental differences, or may be due to the age ofindividuals. Therefore, these data could be supplemented by studiesdirectly related to the environmental conditions of each locality, as wellas skeleton-chronological study to determine individual age.


2018 ◽  
Vol 219 ◽  
pp. 04009
Author(s):  
Oliwier Zapała ◽  
Damian Wieczorek

the main and most impressive elevations of the building. It also focuses on some issues related to high requirements placed on façade systems in terms of insulation from environmental conditions and comfort of the future users of the building. Due to the fact that there are many materials that can be used for the main structural elements (columns, spandrel beams and ribs) of load-bearing façade structures, the authors of the article attempted to do a multi-criteria comparative analysis of three different materials (safety glass, glulam and rolled steel) of a 6-meter-long reference column. The set of criteria, consisting of twelve elements, was adopted for comparative analysis. A combination of two methods was selected for performing the multi-criteria analysis: a geometric method of spider’s network and a mathematical method of the adjusted index of summation.


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