scholarly journals Microbiological Indicators of Meadow-Brown Soils of Natural Cenoses

2021 ◽  
pp. 34-38
Author(s):  
Vafa Mamedzade ◽  

The article presents data on microbiological indicators of meadow-brown soils of semi-humid subtropics of the Lenkoran region. Meadow-brown soils are typical representatives of a number of hydromorphic soils of Azerbaijan. These soils are formed under sparse forests and shrub plantations with well-developed herbage. The soil-forming rocks are deluvial-proluvial deposits of clay composition. The influence of groundwater and surface runoff on soil formation is periodic. In the described soils, biological processes, including the activity of microorganisms, take place at moderate moisture level (10–25%) and temperature (18–23 °C). The paper presents a comparative analysis of the total number of microorganisms (in a layer of 0–50 cm) between typical meadow-brown, meadow-brown leached, meadow-gray-brown and gray-earth-meadow soils. We have shown changes in the total amount of microbiota for individual horizons of meadow-brown soils. Changes in the quantitative indicators of the microbiota of the studied soils also affect their overall biogenicity. A close relationship has been established between humus and the number of microorganisms. As the humus decreases in individual horizons, an adequate decrease in the number of microbiota is noted. If in 0–5 cm, 5–10 cm, 10–15 cm layers the amount of microbiota varied between 6,13–5,83–4,81 million per gram of soil, then in deeper layers of 15–20 cm, 20–25 cm, 30–40 cm, 35–50 cm, their number gradually decreases to 3,9–3,10–2,65–1,81–1,52 million per gram of soil.

2020 ◽  
Author(s):  
Johann Johann And Devika

BACKGROUND Since November 2019, Covid - 19 has spread across the globe costing people their lives and countries their economic stability. The world has become more interconnected over the past few decades owing to globalisation and such pandemics as the Covid -19 are cons of that. This paper attempts to gain deeper understanding into the correlation between globalisation and pandemics. It is a descriptive analysis on how one of the factors that was responsible for the spread of this virus on a global scale is globalisation. OBJECTIVE - To understand the close relationship that globalisation and pandemics share. - To understand the scale of the spread of viruses on a global scale though a comparison between SARS and Covid -19. - To understand the sale of globalisation present during SARS and Covid - 19. METHODS A descriptive qualitative comparative analysis was used throughout this research. RESULTS Globalisation does play a significant role in the spread of pandemics on a global level. CONCLUSIONS - SARS and Covid - 19 were varied in terms of severity and spread. - The scale of globalisation was different during the time of SARS and Covid - 19. - Globalisation can be the reason for the faster spread in Pandemics.


2021 ◽  
Vol 7 (4) ◽  
pp. 270
Author(s):  
Tim J. H. Baltussen ◽  
Jordy P. M. Coolen ◽  
Paul E. Verweij ◽  
Jan Dijksterhuis ◽  
Willem J. G. Melchers

Aspergillus spp. is an opportunistic human pathogen that may cause a spectrum of pulmonary diseases. In order to establish infection, inhaled conidia must germinate, whereby they break dormancy, start to swell, and initiate a highly polarized growth process. To identify critical biological processes during germination, we performed a cross-platform, cross-species comparative analysis of germinating A. fumigatus and A. niger conidia using transcriptional data from published RNA-Seq and Affymetrix studies. A consensus co-expression network analysis identified four gene modules associated with stages of germination. These modules showed numerous shared biological processes between A. niger and A. fumigatus during conidial germination. Specifically, the turquoise module was enriched with secondary metabolism, the black module was highly enriched with protein synthesis, the darkgreen module was enriched with protein fate, and the blue module was highly enriched with polarized growth. More specifically, enriched functional categories identified in the blue module were vesicle formation, vesicular transport, tubulin dependent transport, actin-dependent transport, exocytosis, and endocytosis. Genes important for these biological processes showed similar expression patterns in A. fumigatus and A. niger, therefore, they could be potential antifungal targets. Through cross-platform, cross-species comparative analysis, we were able to identify biologically meaningful modules shared by A. fumigatus and A. niger, which underscores the potential of this approach.


2016 ◽  
Vol 5 (3) ◽  
pp. 21-25
Author(s):  
Natalya Anatolyevna Ilyina ◽  
Tatyana Valentinovna Fufaeva ◽  
Natalya Anatolyevna Kazakova ◽  
Nataliya Mikhailovna Kasatkina ◽  
Evgeniya Alexandrovna Vilkova

The paper assesses the status of the soil cover associated with the pollution of its waste chemical production and consumption. The authors present the data of formaldehyde and toluene influence on the abundance of actinomycetes, heterotrophic bacteria and fungi, as these groups of microorganisms provide self-purification capacity of the soil and participate in soil formation processes. In this paper microbiological and physico-chemical methods of research are used. The study of species composition changes of some soil microorganisms groups of leached chernozem under the influence of formaldehyde and toluene showed that this factor causes changes in the complex of soil microorganisms. This factor is reflected in the decreased species richness and diversity and increase of pollution-tolerant microorganisms. These studies investigate a number of microorganisms that provide self-purification capacity of the soil and participate in soil formation. The results show the nature of the influence of different doses of formaldehyde and toluene on the structure and functioning of the complex of soil microorganisms, as well as reveal the mechanism of action of chemicals (formaldehyde and toluene) on soil microbiota associated with its resistance and the manifestation of toxicity of the soil.


Author(s):  
Manuela Moro-Cabero ◽  
Tatiana Costa Rosa

The main goal of this study is to demonstrate how a management records system increase the level of organizational governance. It also shows how corporate governance interacts with record managers. With that purpose, a descriptive analysis of a qualitative, exploratory, and facetted nature is carried out based on literature and records management standards, with emphasis on the standard ISO 30301:2019 edited on records management (RM). In addition, a comparative analysis of the principles and critical factors of governance is carried out in order to compare them and systematize relations with those of the MSR. As a result, the authors seek to identify the determining critical factors and relationships, both with the most prominent elements as components of governance, and with their basic principles: openness, participation, responsibility, efficiency, and consistency. The results of the study highlight the close relationship between them and show a greater presence in the ISO 30301 standard.


Polar Record ◽  
1999 ◽  
Vol 35 (192) ◽  
pp. 5-10 ◽  
Author(s):  
Bernard Stonehouse

AbstractThis paper presents a simple model of processes by which soils develop in polar and high-altitude regions. It reviews influences of seasonal freezing, permafrost, and vegetation on soil formation; discusses recently formulated concepts of disturbance and damage; and draws attention to developments in remediation, especially possibilities for encouraging natural soil regeneration and rehabilitation processes.


2008 ◽  
Vol 42 (1) ◽  
pp. 129-154
Author(s):  
Oliver Friggieri

Carmelo Psaila (1871–1961), officially known as Dun Karm, has been acknowledged as Malta's national poet long before his death. He embodies the close relationship prevailing for long centuries between Italian culture and Maltese Literature. This essay seeks to unearth the basic characteristics of Dun Karm's poetry, in both Italian and Maltese, in the light of the Italian tradition, ranging from Dante to Monti and Manzoni. His initial identity is neoclassical, and as he moves ahead and gets more aware of his own environment, he assumes an ever growing romantic character. Various aspects of his style (vocabulary, rhythmic patterns, grammatical nuances) and metaphorical language show that there is a profound continuity between his writings in Italian and the subsequent ones in his own native tongue. Through a comparative analysis of his more typical poems, and with specific reference to Vincenzo Monti and Alessando Manzoni, the cultural personality of Dun Karm is identified and illustrated with numerous examples.


2017 ◽  
Vol 22 (3) ◽  
pp. 509-519 ◽  
Author(s):  
A. Alsabry ◽  
V.I. Nikitsin ◽  
V.A. Kofanov ◽  
B. Backiel-Brzozowska

Abstract The non-stationary moisture level of a cellular concrete wall board in a heated utility building located in the northern part of the town of Brest (Belarus), depending on the climatic influence, was assessed in this work. The results were obtained both in a calculation experiment and a physical test. It was observed that the main reason for the high moisture levels in cellular concrete is wind-driven rain intensifying the process of free capillary moisture transfer. A comparative analysis of the results of the physical test and the calculation experiment showed that the THSS software elaborated by the authors was able to predict the actual moisture levels of the shielding structure under study accurately enough when precise data concerning the thermal and physical characteristics of the materials as well as the occurring climatic influences were submitted.


Author(s):  
Stanislav Aleksandrovich Kozlov ◽  
Elizaveta L'vovna Liberman

The article presents the materials of the study of the relationships between the complexes of microarthropods (oribatid-co-bulb and acaridic-astigmatic) in three different types of soils (podzolic, chernozem and gray forest) in the south of the Tyumen region. A comparative analysis of the quantitative indices of the complexes has been carried out, and several factors affecting the formation of indicators of their numbers have been identified. Carrying out a comparative analysis of the quantitative parameters of the oribotical-collembolic and acaridium-astigmatic complexes of microarthropods in podzolic soils and chernozem soils showed that the number of microarthropods on podzolic soils exceeded the indices of chernozem soil by more than 10,000 items per m2. According to the study results on gray forest soils, it was noted that the total number of both investigated microarthropod complexes is 4 times lower than in chernozem and podzolic ones. A possible explanation was that only the upper layers (about 8 cm deep) of the gray forest soil were saturated with the root mass of the plants, which in turn was the habitat of microarthropods; further, the deeper into the soil, the less the number of roots, and, accordingly,the less the quantity of food base for microarthropods. It was also found that the largest number of microarthropods of both investigated complexes was reached on podzolic (more than 17 600 specimens/m2) and chernozem soils (more than 16 300 specimens/m2). The smallest number of microarthropods was recorded on gray forest soils (up to 6 500 specimens/m2). The maximum indices of the abundance of the oribotical-colembolic and acaridium-astigmatic complexes on all types of soils were noted in May and September. For the period of the conducted researches, the oribatidic-collembolic complex was the dominant in number, the most significant indicators of which were found in areas with podzolic soils in the autumn (15 392 ind./m2).


2020 ◽  
Vol 2 (2) ◽  
pp. 185-196
Author(s):  
Yadira Rivera Espinoza

A vast number of microorganisms inhabit the human body and coexist peacefully with their hosts, under specific conditions. The complex ecosystem of microbial communities found in the intestine fulfills numerous metabolic, physiological, and protective functions of the human body. Recent studies show that an imbalance in these communities (dysbiosis) maintains a close relationship with the health of the host. The change in eating habits, lifestyle, and different compounds of exogenous origin are some of the main factors causing that alteration, which represent new challenges for medical practice. Therefore, the objective of this document is to provide information about the intestinal microbiota concept, the factors altering it, some of the diseases associated with dysbiosis, and the evidence of some foods that may induce the modulation of the intestinal microbiota. Knowing the relationship between food, microbiota, and health is relevant to have more elements in the treatment of diseases in modern society.


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