Accumulation of microelements by different invertebrate trophic groups on wasted lands

2017 ◽  
Vol 7 (4) ◽  
pp. 30-34 ◽  
Author(s):  
O. A. Didur ◽  
Yu. L. Kulbachko ◽  
V. Y. Gasso
Keyword(s):  
Active Agent ◽  
Dry Weight ◽  
Nature Management ◽  
Habitat Transformation ◽  
Natural Landscapes ◽  
Invertebrate Animals ◽  
Risk Of Disease ◽  
Ore Dressing ◽  
Processing Enterprise

<p>The problem of transformation of natural landscapes resulted from the negative technogenic impact is highlighted. It is shown that mining enterprises are powerful anthropo-technical sources of organic and inorganic toxicants entering the environment. Their wastes pollute all components of the ecosystems and negatively influence human health by increasing a risk of disease. The nature of the accumulation of trace elements (Fe, Cu, Zn, Ni, Cd, and Pb) by invertebrate animals of various functional groups under conditions of anthropo-technogenic pressure was studied. The sample plots were located on self-overgrowing sites with ruderal vegetation located in the immediate vicinity of the Mangan ore-dressing and processing enterprise (Dnipropetrovsk region). It is quite naturally that among the studied biogenic microelements (Fe, Cu, Zn and Ni), the phyto-, zoo-, and saprophages in the investigated zone of technogenic pollution most actively accumulate Fe:<em> </em>22758, 17516 and 18884 mg/kg dry weight on average, respectively. There are significant differences (p ≤ 0.05) in the content of studied microelements between saprophages and phytophages. The saprophages accumulate such trace metals as Mn, Cu, Zn and Cd in high quantities, but Ni and Pb – in smaller ones. The saprophagous functional group of invertebrates is an active agent of detritogenesis, in the conditions of modern nature management it acts as a powerful element of ecosystem engineering (habitat transformation), the main ecological role of which is to modify the habitat of other soil biota. In addition, the saprophages fulfil their concentrating geochemical function. They actively participate in the most important soil biochemical process: the formation of humus, the migration of microelements along trophic chains, the biological cycle in general, and provide such supporting ecosystem services as increasing soil fertility and nutrient cycling.</p>

scholarly journals Phytoextraction of Lead Using a Hedge Plant [Alternanthera bettzickiana (Regel) G. Nicholson]: Physiological and Biochemical Alterations through Bioresource Management

2021 ◽  
Vol 13 (9) ◽  
pp. 5074
Author(s):  
Urooj Kanwal ◽  
Muhammad Ibrahim ◽  
Farhat Abbas ◽  
Muhammad Yamin ◽  
Fariha Jabeen ◽  
...  
Keyword(s):  
Citric Acid ◽  
Growth Parameters ◽  
Cost Effective ◽  
Dry Weight ◽  
Citric Acid Concentration ◽  
Biochemical Alterations ◽  
Biomass Plant ◽  
Environmentally Friendly Approach ◽  
Pb Concentration

Phytoremediation is a cost-effective and environmentally friendly approach that can be used for the remediation of metals in polluted soil. This study used a hedge plant–calico (Alternanthera bettzickiana (Regel) G. Nicholson) to determine the role of citric acid in lead (Pb) phytoremediation by exposing it to different concentrations of Pb (0, 200, 500, and 1000 mg kg−1) as well as in a combination with citric acid concentration (0, 250, 500 µM). The analysis of variance was applied on results for significant effects of the independent variables on the dependent variables using SPSS (ver10). According to the results, maximum Pb concentration was measured in the upper parts of the plant. An increase in dry weight biomass, plant growth parameters, and photosynthetic contents was observed with the increase of Pb application (200 mg kg−1) in soil while a reduced growth was experienced at higher Pb concentration (1000 mg kg−1). The antioxidant enzymatic activities like superoxide dismutase (SOD) and peroxidase (POD) were enhanced under lower Pb concentration (200, 500 mg kg−1), whereas the reduction occurred at greater metal concentration Pb (1000 mg kg−1). There was a usual reduction in electrolyte leakage (EL) at lower Pb concentration (200, 500 mg kg−1), whereas EL increased at maximum Pb concentration (1000 mg kg−1). We concluded that this hedge plant, A. Bettzickiana, has the greater ability to remediate polluted soils aided with citric acid application.

scholarly journals Myco-Suppression Analysis of Soybean (Glycine max) Damping-Off Caused by Pythium aphanidermatum

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 788
Author(s):  
Shaban R. M. Sayed ◽  
Shaimaa A. M. Abdelmohsen ◽  
Hani M. A. Abdelzaher ◽  
Mohammed A. Elnaghy ◽  
Ashraf A. Mostafa ◽  
...  
Keyword(s):  
Glycine Max ◽  
Biocontrol Agent ◽  
Lateral Roots ◽  
Dry Weight ◽  
Pythium Aphanidermatum ◽  
Damping Off ◽  
Pythium Oligandrum ◽  
Rdna Its ◽  
Half Strength

The role of Pythium oligandrum as a biocontrol agent against Pythium aphanidermatum was investigated to avoid the harmful impacts of fungicides. Three isolates of P. oligandrum (MS15, MS19, and MS31) were assessed facing the plant pathogenic P. aphanidermatum the causal agent of Glycine max damping-off. The tested Pythium species were recognized according to their cultural and microscopic characterizations. The identification was confirmed through sequencing of rDNA-ITS regions including the 5.8 S rDNA. The biocontrol agent, P. oligandrum, isolates decreased the mycelial growth of the pathogenic P. aphanidermatum with 71.3%, 67.1%, and 68.7% through mycoparasitism on CMA plates. While the half-strength millipore sterilized filtrates of P. oligandrum isolates degrade the pathogenic mycelial linear growth by 34.1%, 32.5%, and 31.7%, and reduce the mycelial dry weight of the pathogenic P. aphanidermatum by 40.1%, 37.4%, and 36.8%, respectively. Scanning electron microscopy (SEM) of the most effective antagonistic P. oligandrum isolate (MS15) interaction showed coiling, haustorial parts of P. oligandrum to P. aphanidermatum hyphae. Furthermore, P. oligandrum isolates were proven to enhance the germination of Glycine max seedling to 93.3% in damping-off infection using agar pots and promote germination of up to 80% during soil pot assay. On the other hand, P. oligandrum isolates increase the shoot, root lengths, and the number of lateral roots.

The role of nematodes, fungi, bacteria, and abiotic factors in the etiology of apple replant problems in the Granite Belt of Queensland

1994 ◽  
Vol 34 (8) ◽  
pp. 1177 ◽  
Author(s):  
SR Dullahide ◽  
GR Stirling ◽  
A Nikulin ◽  
AM Stirling
Keyword(s):  
Abiotic Factors ◽  
Dry Weight ◽  
Pratylenchus Penetrans ◽  
Growth Responses ◽  
Granite Belt ◽  
Pathogenicity Tests ◽  
Phosphorus And Potassium ◽  
Orchard Soils ◽  
Fusarium Tricinctum

Investigations of apple replant failure in the Granite Belt suggested that the problem had a complex etiology. Soil fertility was an important factor because apple seedlings grew best in replant soils with high levels of nitrogen, phosphorus, and potassium. Consistent improvements in the growth of apple seedlings were obtained when typical orchard soils were treated with fenamiphos, confirming that lesion nematode was also an important component of the disease complex. Pratylenchus penetrans had been recognised as a pathogen of apples, and pathogenicity tests showed that P. jordanensis, another species widely distributed in the Granite Belt, had similar effects. Growth responses of apple seedlings were greater when soil was pasteurised than when it was treated with fenamiphos, suggesting that root pathogens other than nematodes were involved in apple replant failure. However, the primary cause probably differed between orchards because soils did not respond in the same manner to pasteurisation and nematicide treatments. Pathogenicity tests with 14 bacteria associated with apple roots showed no effect on the growth of apple seedlings. However, Fusarium tricinctum, Cylindrocarpon destructans, and Pythium sp. were implicated in the problem because they were consistently recovered from discoloured roots. In a factorial experiment involving nematodes and fungi in pots, P. jordanensis, P. penetrans, E. tricinctum, and C. destructans reduced the dry weight of apple roots but there was no interaction between nematodes and fungi.

The Growth of a Tree—A Metaphor for Reflecting on the Role of JRME

2014 ◽  
Vol 45 (4) ◽  
pp. 402-405
Author(s):  
Nerida F. Ellerton
Keyword(s):  
Education Research ◽  
Mathematics Education ◽  
Root System ◽  
Soil Nutrients ◽  
Tree Species ◽  
Natural World ◽  
Mathematics Education Research ◽  
Growth And Survival ◽  
Natural Landscapes

Research journals likeJRMEplay key roles through the publication of peerreviewed research, and it is through such publications that the field has the potential to grow. The metaphor of a growing tree is a useful one to explore in the context of mathematics education research. Growth in the natural world is generally multidimensional. A tree's growth is measured not only in terms of its height but also in terms of the girth of its trunk, the spread of its branches, and the development of a substantial root system, all of which are essential for the tree's continued growth and survival. Soil nutrients need to be replenished, and without sufficient moisture, growth is arrested, and the tree becomes stunted. Many of the most interesting natural landscapes include a range of tree species as well as supporting undergrowth.

scholarly journals Systematization of ethnoeconomic vectors within the context of regional development of the Krasnodar Territory

2021 ◽  
pp. 51-58
Author(s):  
Elena Nikolaevna-Klochko ◽  
Sergey Mikhailovich-Reznichenko ◽  
Lidia Vladimirovna-Kovalenko
Keyword(s):  
Regional Development ◽  
Financial Resource ◽  
Practical Significance ◽  
Nature Management ◽  
Ethnic Tourism ◽  
Socio Economic Development ◽  
Ethnic Entrepreneurs ◽  
Tangible Support ◽  
Resource Capacity

The research aims to study the role of ethnoeconomy in the regional development of a polyethnic region and the structure of its vectors, which allows considering ethnoeconomy as a structure-forming factor for territories. Methodology: the research was conducted among ethnic entrepreneurs of the Krasnodar Territory. The authors studied the Strategy for Socio-Economic Development of the Krasnodar Territory until 2030 and surveyed 40 ethnic entrepreneurs engaged in ethnic tourism and crafts. Conclusions: according to the authors, the basic ethnoeconomic vectors include ethnic and ethnographic tourism, traditional agriculture and traditional nature management. The ethnic entrepreneurs surveyed indicated several problems in the selected ethnoeconomic vectors, for instance: limited availability of state and municipal programmes that would mobilize additional resources; weak infrastructure of the ethnoeconomic segment of the region, which makes the ethnoeconomic environment less competitive; and low financial resource capacity of the segments of the ethnoeconomic environment. Practical significance: the authors compiled a matrix table presenting the application of methods for regulating the ethnoeconomic vectors of the regional development of the Krasnodar Territory, which allows the authorities of the region to distinguish between the methods of regional ethnoeconomic development in order to control the management situation, adapt instruments and guidelines, and provide tangible support to ethnic entrepreneurs in line with the identified vectors of ethnoeconomic development of the region.

scholarly journals THE ROLE OF INTERLEUKIN 1β GENE POLYMORPHISM IN DEVELOPMENT OF PREDOMINANTY SENSORY CHRONIC INFLAMMATORY DEMYELINATING POLYNEUROPATHY

2019 ◽  
Vol 21 (1) ◽  
pp. 141-148
Author(s):  
T. E. Popova ◽  
N. A. Shnayder ◽  
M. M. Petrova ◽  
A. A. Tappakhov
Keyword(s):  
Chronic Inflammatory Demyelinating Polyneuropathy ◽  
Study Groups ◽  
Krasnoyarsk Region ◽  
Genotype Frequencies ◽  
Increased Risk ◽  
Significant Difference ◽  
Risk Of Disease ◽  
T Locus ◽  
Il1b Gene

The aim of the present study was a search for associations between the polymorphic allelic variants 3954 C>T (rs1143644) and -511C>T (rs16944) of IL1B gene in the patients with sensory predominant chronic inflammatory demyelinating polyneuropathies (SP-CIDP) from Krasnoyarsk Region and the Sakha (Yakutia) Republic. A total of 95 people were examined, having been divided into 2 groups according to their residence. The first group consisted of 42 patients living in the Sakha (Yakutia) Republic. The second group included 53 patients living in the Krasnoyarsk Region. It was revealed that the carriers of homozygous CC genotype in the 3954C>T locus were more often detected in patients from the Sakha (Yakutia) Republic, and the carriage of TT genotype is found exclusively in the patients from Krasnoyarsk Region. When comparing the different genotype frequencies in the -511CT locus, we did not reveal any statistically significant differences between the two groups of patients. Presence of the CC genotype of the 3954C>T locus was associated with a significantly increased risk of disease in the patients from Sakha (Yakutia) Republic, while carrying CT and TT genotypes at the locus 3954C>T and the TT genotype at the locus -511C>T, is associated with increased risk disorder among patients of the Krasnoyarsk Region. The frequency of carriage of various genotypes in the 3954C>T and -511C>T loci of the IL1B gene was prevalent among the patients from the Sakha (Yakutia) Republic, the association of genotypes of CC/CT prevailed in patients from the Krasnoyarsk Region (p = 0.005), as well as prevalence of CC/CC and CC/CT (p = 0.023). However, there was no statistically significant difference in occurrence of individual genotypes between the two study groups. When analyzing the carrier frequency of high-producing alleles of 3954C and -511C in patients with SP-CIDP, it was shown that they were significantly more common among patients from the Sakha (Yakutia) Republic and patients from the Krasnoyarsk Region than the low-producing 3954T and -511T alleles. Moreover, the 3954C allele was more often found in the Yakut group (p = 0.001), and in the -511C allele for the Krasnoyarsk group of patients (p = 0.05). The presence of 3954C and -511C alleles increases the risk of SP-CIDP development in patients from the Sakha (Yakutia) Republic, as well as carriage of 3954T allele in patients from the Krasnoyarsk Region.

scholarly journals Evidence for Microbial Fe(III) Reduction in Anoxic, Mining-Impacted Lake Sediments (Lake Coeur d'Alene, Idaho)

2000 ◽  
Vol 66 (1) ◽  
pp. 154-162 ◽  
Author(s):  
David E. Cummings ◽  
Anthony W. March ◽  
Benjamin Bostick ◽  
Stefan Spring ◽  
Frank Caccavo ◽  
...  
Keyword(s):  
Iron Reduction ◽  
Dry Weight ◽  
Most Probable Number ◽  
Probable Number ◽  
Coeur D'alene ◽  
Reduction Of Iron ◽  
Study Support ◽  
Reducing Bacteria ◽  
Microbiological Data

ABSTRACT Mining-impacted sediments of Lake Coeur d'Alene, Idaho, contain more than 10% metals on a dry weight basis, approximately 80% of which is iron. Since iron (hydr)oxides adsorb toxic, ore-associated elements, such as arsenic, iron (hydr)oxide reduction may in part control the mobility and bioavailability of these elements. Geochemical and microbiological data were collected to examine the ecological role of dissimilatory Fe(III)-reducing bacteria in this habitat. The concentration of mild-acid-extractable Fe(II) increased with sediment depth up to 50 g kg−1, suggesting that iron reduction has occurred recently. The maximum concentrations of dissolved Fe(II) in interstitial water (41 mg liter−1) occurred 10 to 15 cm beneath the sediment-water interface, suggesting that sulfidogenesis may not be the predominant terminal electron-accepting process in this environment and that dissolved Fe(II) arises from biological reductive dissolution of iron (hydr)oxides. The concentration of sedimentary magnetite (Fe3O4), a common product of bacterial Fe(III) hydroxide reduction, was as much as 15.5 g kg−1. Most-probable-number enrichment cultures revealed that the mean density of Fe(III)-reducing bacteria was 8.3 × 105 cells g (dry weight) of sediment−1. Two new strains of dissimilatory Fe(III)-reducing bacteria were isolated from surface sediments. Collectively, the results of this study support the hypothesis that dissimilatory reduction of iron has been and continues to be an important biogeochemical process in the environment examined.

Social Networks

Urban Health ◽  
2019 ◽  
pp. 248-255
Author(s):  
Abby E. Rudolph
Keyword(s):  
Public Health ◽  
Social Networks ◽  
Disease Transmission ◽  
Urban Areas ◽  
Urban Environments ◽  
Ample Evidence ◽  
Risk Of Disease ◽  
Barriers To Health ◽  
Distinguishing Features

One of the distinguishing features of urban environments is the close proximity of their residents. There is ample evidence that our social networks influence how we think, feel, and behave and, through doing so, shape our health. Therefore, the challenge and opportunity for urban areas is how to foster social relationships and interactions that promote healthier behaviors, reduce the risk of disease transmission, and remove or serve as buffers against existing barriers to health service utilization. This chapter provides a theoretical framework for thinking about the role of social networks in public health and provides two examples how social network analysis has been used to better understand two major public health concerns in urban settings.

Working with nature in designing cultural events: the case of Norway.

2021 ◽  
pp. 80-93
Author(s):  
Lusine Margaryan ◽  
Peter Fredman
Keyword(s):  
Empirical Data ◽  
Outdoor Recreation ◽  
Visual Analysis ◽  
Event Studies ◽  
Cultural Narratives ◽  
Cultural Events ◽  
Nature And Culture ◽  
Natural Landscapes ◽  
Tourism Flows

Abstract This chapter looks at the role of nature in cultural events and the role of event design in facilitating holistic experiences of nature and culture. The chapter focuses on understanding how the cultural narratives (content) are woven into the natural environment (context) and how this relationship is designed to give rise to the event experience. The study is based on theoretical insights from the fields of event studies and nature-based tourism and outdoor recreation. Empirically, the case is based on Norway, which currently experiences rapid growth in tourism flows as well as proliferation of a wide variety of outdoor events in its scenic natural landscapes. The empirical data come from interviews with outdoor event managers as well as a visual analysis of the websites of cultural events in nature.

Über die Zellmembran von Escherichia Coli B

1954 ◽  
Vol 9 (6) ◽  
pp. 398-406 ◽  
Author(s):  
Wolfhard Weidel ◽  
Gebhard Koch ◽  
Friedrich Lohss
Keyword(s):  
Escherichia Coli ◽  
Chemical Analysis ◽  
Cell Membrane ◽  
B Cell ◽  
Dry Weight ◽  
Shigella Sonnei ◽  
Receptor Activity ◽  
Escherichia Coli B

Dissociation in 90% phenol uncovers a layer of the Coli B-cell membrane showing the typical antiviral specificity of the receptor for phages T3, T4 and T7. Chemical analysis proved glucose, glucosamine and a yet unknown carbohydrate, probably a heptose, to be components of the receptor material, which amounts to about 13% of the dry weight of the whole membrane.Analogous material obtained from the membrane of B/3,4,7, a B-mutant resistant against phages T3, T4 and T7, has no activity against these phages and contains glucosamine and small amounts of glucose, but no heptose.In view of similar findings of Jesaitis and Goebel with T3,4,7 - receptor material from Shigella Sonnei, the rôle of the heptose as a characteristic and functionally indispensable component of lipocarbohydrates with receptor activity against T3, T4 and T7 is discussed.

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