scholarly journals Ecotoxicological assessment of Zn, Cu and Ni based NPs contamination in Arenosols

Author(s):  
Sergey Kolesnikov ◽  
Аlena Timoshenko ◽  
Tatiana Minnikova ◽  
Tatiana Minkina ◽  
Vishnu D Rajput ◽  
...  

Nanoparticles are increasingly used in many industrial fields because of their special properties. In this context, several questions arise related to possible negative consequences associated with nanoparticle (NPs) entrance into the ecosystem.  The adsorption of NPs by soil can adversely influence its biological properties. In the present article, the influence of Cu, Zn, and Ni NPs on the biological characteristics of Arenosol is considered. Research aimed to study the effect of Cu, Zn, Ni NPs on the biological characteristics of sandy loam chernozem. Copper, Zn, and Ni NPs were added to the soil in concentrations of 100, 1,000, and 10,000 mg kg<sup>-1</sup>. The effect of NPs on the biological properties of Arenosol was evaluated after 10-day incubation. The biological indices of the ecological condition of the soil, including the germination of radish, the length of the roots, the bacteria population, <em>Azotobacter</em> sp. count, the catalase activity, and dehydrogenases were studied. As a result of this study, it was revealed that the degree of indices changes depending on the concentration of Cu, Zn, and Ni NPs in the Arenosols. Microbiological characteristics (bacteria population, and <em>Azotobacter</em> sp. count) and phytotoxic feature (length of roots and radish germination) properties were most sensitive to contamination compared to the enzyme activity of Arenosol. Based on the soil integral index of a biological state, the strongest inhibitory effect on biological parameters of Arenosols relative to the control was exerted by Cu NPs (lower than control by 48-72%), while the greatest stability in Arenosol was found for Ni NPs (lower than control by 30-55%). The studied biological parameters allow characterizing the severity of nanoparticle exposure on Arenosols. Early diagnostics of the severity of soil contamination by NPs can be successfully used to quickly assess their impact on the soil condition and prevent possible adverse consequences.

1992 ◽  
Vol 27 (2) ◽  
pp. 301-310
Author(s):  
Agnes G. Pulvermüller ◽  
Heidulf E. Müller

Abstract The survey of the ecological condition of eight lakes within the city limits of Freiburg included hydrochemical measurements and analyses (oxygen profiles, Secchi depth, pH, biochemical oxygen demand) together with biological parameters (chlorophyll a, phytoplanktonbiomass, Escherichia coli counts), as well as parasitic examinations. Only some of the investigated parameters are presented here. Seven of the eight lakes were found to be eutrophic. The process of eutrophication appears to be still in progress. One lake can be considered to be hypertrophic. Schistosome dermatitis was observed. The water quality in general was considered to be acceptable; suggestions to maintain or improve the water quality are made.


2021 ◽  
Vol 22 (12) ◽  
pp. 6466
Author(s):  
Yingji Xin ◽  
Kyungbaeg Roh ◽  
Eunae Cho ◽  
Deokhoon Park ◽  
Wankyunn Whang ◽  
...  

Inflammation is increasingly recognized as a critical mediator of angiogenesis, and unregulated angiogenic responses often involve human diseases. The importance of regulating angiogenesis in inflammatory diseases has been demonstrated through some successful cases of anti-angiogenesis therapies in related diseases, including arthritis, but it has been reported that some synthetic types of antiangiogenic drugs have potential side effects. In recent years, the importance of finding alternative strategies for regulating angiogenesis has begun to attract the attention of researchers. Therefore, identification of natural ingredients used to prevent or treat angiogenesis-related diseases will play a greater role. Isookanin is a phenolic flavonoid presented in Bidens extract, and it has been reported that isookanin possesses some biological properties, including antioxidative and anti-inflammatory effects, anti-diabetic properties, and an ability to inhibit α-amylase. However, its antiangiogenic effects and mechanism thereof have not been studied yet. In this study, our results indicate that isookanin has an effective inhibitory effect on the angiogenic properties of microvascular endothelial cells. Isookanin shows inhibitory effects in multiple stages of PGE2-induced angiogenesis, including the growth, proliferation, migration, and tube formation of microvascular endothelial cells. In addition, isookanin induces cell cycle arrest in S phase, which is also the reason for subsequent inhibition of cell proliferation. The mechanism of inhibiting angiogenesis by isookanin is related to the inhibition of PGE2-mediated ERK1/2 and CREB phosphorylation. These findings make isookanin a potential candidate for the treatment of angiogenesis-related diseases.


Author(s):  
Fabrício Freitas Fernandes ◽  
Amanda Latercia Tranches Dias ◽  
Cíntia Lacerda Ramos ◽  
Masaharu Ikegaki ◽  
Antonio Martins de Siqueira ◽  
...  

Cryptococcosis is a worldwide disease caused by the etiological agent Cryptococcus neoformans. It affects mainly immunocompromised humans. It is relatively rare in animals only affecting those that have received prolonged antibiotic therapy. The propolis is a resin that can present several biological properties, including antibacterial, antifungal and antiviral activities. The standard strain C. neoformans ATTC 90112 was used to the antifungal evaluation. The tests were realized with propolis ethanol extract (PEE) G12 in concentrations from 0.1 to 1.6 mg mL-1. The evaluation of MIC and MFC were done according to DUARTE (2002)5. The inhibitory effect of PEE G12 on the fungal growing was seen at the concentration of 0.2 mg mL-1 and 1.6 mg mL-1 was considered a fungicidal one.


2021 ◽  
Author(s):  
Yuliya Akimenko

Abstract In model laboratory and field conditions, the influence of pollution by antibiotics (benzylpenicillin, ampicillin, streptomycin, oxytetracycline, tylosin, pharmasin, tromexin, aliseryl, and nystatin) on the biological properties of ordinary chernozem was examined in concentrations of 1-1000 mg/kg. A decrease in the majority of the basic biological parameters of chernozem occurs when the concentration of antibiotics is 100 mg/kg of soil. In most cases, there was a direct relationship between the content of antibiotics in the soil and the scale of a decrease in the studied parameters. The degree of the influence of antibiotics was determined by their nature, concentration and time of exposure. Antibacterial antibiotics had more negative impact on the studied indicators than fungicidal ones. By the degree of inhibiting the biological properties of chernozem, antibiotics formed the following sequence: ampicillin > benzylpenicillin ≥ streptomycin ≥ oxytetracycline > tylosin ≥ pharmasin > nystatin > tromexin > aliseryl. Among the examined biological parameters when polluted by antibiotics, the most informative one was the number of ammonifying bacteria and the activity of dehydrogenases. The least informative was the indicator of catalase activity. The abundance of bacteria of the genus Azotobacter in case of pollution by antibiotics was not informative. The degree of a decrease in biological indicators was more pronounced in laboratory conditions than in the field ones. The rate of the biological activity recovery of chernozem after pollution in the field was 2 times higher. According to the degree of resistance to antibiotics, the investigated microorganisms of chernozem formed the following sequence: bacteria of the genus Azotobacter > micromycetes > amylolytic bacteria > ammonifying bacteria. Enzymes formed the following sequence: peroxidase ≥ polyphenol oxidase > catalase > dehydrogenase > invertase ≥ phosphatase. Antibiotics had prolonged influence on the biological properties of ordinary chernozem. The examined parameters were observed not to be recovered to control values even on the 120th day after the pollution.


2019 ◽  
Vol 95 (10) ◽  
pp. 934-938 ◽  
Author(s):  
Yu. A. Rakhmanin ◽  
L. V. Ivanova ◽  
T. Z. Artemova ◽  
E. K. Gipp ◽  
Anzhelika V. Zagainova ◽  
...  

The increasing chemicalization of production and life leads to the pollution of water bodies by chemicals, the effect of which on the micro - and macro - organisms is poorly understood. This section of the study in sanitary bacteriology is becoming ever more topical and is an important task of modern hygienic science. One of complicacies of the study of the problem is related with the fact that the presence of only experimental data fails to be sufficient, as the impact of any given chemical substance on different bacteria in the experiment does not mean that under natural conditions, similar results will be obtained. One reason for this may be the inhibitory effect of the given chemical on biological properties of bacteria, while in field conditions in the water several chemicals interacting with each other can exist. In this regard, the aim of the work was to assess the indicator value of sanitary and microbiological indices of epidemic hazard of water use in conditions of chemical pollution of surface water bodies.


Author(s):  
Venera Mihaela STROE ◽  
Irina CALCIU ◽  
Monica STANCIU BURILEANU ◽  
Lavinia PARVAN

Continuous use of traditional tillage system (conventional) resulted in a gradual harvest increase, but gave rise to some worrying negative phenomenon regarding the most important supply of the agricultural production - soil, by its chemical and physical degradation.This paper aims to assess soil degradation processes, based on pedo-transfer rules and is based on of expeditionary studies regarding assessment and characterization of soil fertility, under the practice of various farming systems: conventional tillage and minimum tillage. The study carried out the effects of moderat conservative tillage on physical and chemical soil properties comparative with conventional soil technology on an argic chernozem, belongs to the agricultural Caracal area. Agricultural area is affected by a relatively high variability of the limiting factors and soil degradation processes, which require adaptation of technology systems to protection of soil and plants. Because of all limiting factors, natural and antropic, in this expeditionary study we compare the moderat conservative tillage effects, with conventional technology effects and impact of those both soil technology, on physical, chemical and biological properties. Results of study show the potential depth of aeration conditions are moderately favorable, being determined particularly by intense state of compactness of the soil as a natural consequence of it. Macroporosity decrease in depth, has negative consequences not only on the normal performance of the processes of aeration, and water penetration and infiltration, but for the accumulation of water available for plants. Content of structural microagregates water-stable or soil dispersion is high, which shows that the formation of structural macroagregates occurred more mechanical factors such as compaction or natural processes. The numerical values of the degree of compaction of 15-20 cm in depth up to the 15-18% v / v in both phases of observation. Deep compaction is undoubtedly due to the technological system applied to the greatest extent, and only a small part pedogenetical natural factors.


2021 ◽  
Vol 36 (1) ◽  
pp. 13-21
Author(s):  
A.B. Ella ◽  
E.T. Azua ◽  
C.U. Aguoru ◽  
A.A. Onekutu ◽  
F.A. Ella

The study evaluated sub-lethal toxicity of commercial glyphosate-based Di-ammonium formulation commonly known as ‘Touchdown’ on haematological profile of Clarias gariepinus juveniles. A total of two hundred catfish juveniles of mean weight 31.07±1.23g and mean length 19.50 ± 0.50cm were exposed to different  concentrations of Di-ammonium formulation (1.26, 2.52, 5.03 and 0.00 mg/l) for eight (8) weeks. Each concentration was treated in triplicate using a static bioassay system. Physico-chemical parameters of the test water were monitored throughout the study period. Results showed that haematocrit (HCT), red blood cell (RBC), haemoglobin (HGB), Mean Corpuscular Volume (MCV), Mean Corpuscular Haemoglobin (MCH), Mean Corpuscular Haemoglobin Concentration (MCHC) and Platelets (PLT) counts decreased significantly (p<0.05) with increase in concentrations of Touchdown. Whereas, white blood cell (WBC) counts increased significantly (p<0.05) with increasing concentrations of the glyphosate-based formulation. Water temperature, pH, Total dissolved solid (TDS) and electrical conductivity (EC) increased linearly with increasing concentration, while dissolved oxygen content decreased significantly (p<0.05). The results from this study indicated that Di-ammonium glyphosate–based formulation had negative consequences on the blood of treated fish. In view of this, the application of Di-ammonium glyphosate-based formulation should be done in a sustainable manner with proper regulations.


Pathogens ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 115 ◽  
Author(s):  
Busi Siddhardha ◽  
Uday Pandey ◽  
K. Kaviyarasu ◽  
Rajasekharreddy Pala ◽  
Asad Syed ◽  
...  

The application of nanotechnology in medicine is gaining popularity due to its ability to increase the bioavailability and biosorption of numerous drugs. Chrysin, a flavone constituent of Orocylumineicum vent is well-reported for its biological properties. However, its therapeutic potential has not been fully exploited due to its poor solubility and bioavailability. In the present study, chrysin was encapsulated into chitosan nanoparticles using TPP as a linker. The nanoparticles were characterized and investigated for their anti-biofilm activity against Staphylococcus aureus. At sub-Minimum Inhibitory Concentration, the nanoparticles exhibited enhanced anti-biofilm efficacy against S. aureus as compared to its bulk counterparts, chrysin and chitosan. The decrease in the cell surface hydrophobicity and exopolysaccharide production indicated the inhibitory effect of the nanoparticles on the initial stages of biofilm development. The growth curve analysis revealed that at a sub-MIC, the nanoparticles did not exert a bactericidal effect against S. aureus. The findings indicated the anti-biofilm activity of the chrysin-loaded chitosan nanoparticles and their potential application in combating infections associated with S. aureus.


2020 ◽  
Vol 13 ◽  
pp. 117862212096919
Author(s):  
James Peter Muchoka ◽  
Daniel Njiru Mugendi ◽  
Paul Nthakanio Njiruh ◽  
Charles Onyari ◽  
Paul Kamau Mbugua ◽  
...  

The use of arbuscular mycorrhizal fungi (AMF) to enhance soil phosphate uptake is a biological technique considered to cure phosphate deficiency in soils. This study investigated association of Aspilia pruliseta Schweif shrub with AMF in Kenya. The study aims at profiling a tropical shrub with multiple ecological benefits that could reduce addition of chemical phosphatic fertilizer into the soil and reverse negative consequences of eutrophication. Sampling was purposive to have areas with or without Aspilia pruliseta vegetation growing. A small amount (10 g) of the soil from 27 composite samples was used for spore count determination and a similar amount for next generation sequencing. Spore counts varied significantly among soil textural types, sample locations, and soil depth. Sandy loam had the highest spore counts with a mean average of 404 spores. The spore count decreased significantly ( P < .05) with the depth of soil from a mean of 514 spores to 185 along the rhizosphere. The intensity of spore morphotypes was significantly higher at P < .05 for soils whose vegetation was covered with Aspilia pruliseta than those without. Aspilia pruliseta vegetation used together with sandy loam soil could culture commercial mycorrhiza fungi production for use in agrisystems.


2019 ◽  
Vol 9 (5) ◽  
pp. 1085
Author(s):  
Mikhail А. MOROZOV ◽  
Natalia S. MOROZOVA

The article discusses the environmental impact of tourism and hotel business on the environment and business responsibility for these negative consequences. It is shown that the ecological responsibility of the tourist and hotel business acts as a key factor determining the level of development of entrepreneurial culture in tourism and hospitality. The state of the Russian regulatory framework regulating the activities of the tourist business is analyzed. It is noted that in connection with the rapid development of hotel infrastructure in Russia, the problems of ensuring the ecological safety of hotels have become topical. It is shown that the growing number of tourists in the formation of the ecological component of tourism is the emergence of a new category of tourists who, in the process of traveling, pay special attention to the issues of ecology, preservation of the environment, development of the planet. It is emphasized that the ecological condition of the tourist destination is an important aspect of the travel motivation. The directions of increasing the environmental responsibility of entrepreneurship in tourism and hospitality are proposed, as well as the formation of an ecologically responsible tourist.


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