scholarly journals Azolla (Caroliniana): An Aquatic Energy Crop for Remediation of Eutrophic Ecosystems with Prospect of Biofuel Production in Bangladesh

2020 ◽  
Vol 7 (2) ◽  
pp. 79-XX
Author(s):  
Kamrun Nahar
Keyword(s):  
Water Quality ◽  
Aquatic Macrophyte ◽  
High Growth ◽  
Green Energy ◽  
Growth Potential ◽  
Biofuel Production ◽  
Energy Crop ◽  
Eutrophic Lakes ◽  
Eutrophic Water ◽  
Nacl Concentration

The Phytoremediation ability of aquatic macrophyte, Azolla as potential biomass, to improve the quality of eutrophic lakes and river water of Bangladesh at lab scale were studied to remove organics, solutes and improving the physicochemical properties of water including pH, DO, EC, TDS, Turbidity and NaCl concentration. In the different eutrophic water, a 100% survival rate of the species was observed. The extensive root system of the phytoremediator improves water quality after one week as determined by a marked decrease in Turbidity, TDS,  EC & Nacl and increased in DO and pH. DO content served as a useful indicator of water quality and increased manifolds over 7 days (one week) of treatment. The capability of the plant in removing pollutants and improving water quality was established from the study. After phytoremediation activities, the discarded energy crop biomass could be used to produce green energy because of its high growth potential.  

Surface Water Quality Assessment from a Mining Area. Case study, Groapa Burlacu lake, Targu Ocna, Romania

2019 ◽  
Vol 70 (10) ◽  
pp. 3678-3680
Author(s):  
Alina Cochiorca ◽  
Narcis Barsan ◽  
Florin Marian Nedeff ◽  
Ion Sandu ◽  
Emilian Florin Mosnegutu ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Mining Area ◽  
Physical Parameters ◽  
Mining Activities ◽  
Quality Of Water ◽  
Nacl Concentration ◽  
Water Ph

This paper presents a study on assessment of water quality. According to a study, mining activities have a significant impact on water quality (lakes, surface water and groundwater), which has become a major problem globally. Due to mining and exploitation processes, lakes can be formed around these mines. Also, these lakes have been formed around the world and are steadily increasing. The purpose of this study is to watch the quality of water from the area around mining activities. This study refers to the, Groapa Burlacu lake around the mining exploitation Targu Ocna, Romania. This lake was formed on the northern bottle of the massive salt, strongly affected by the underground activities. Sampling for the determination the concentrations of Cl- and NaCl from the studied area was made at different depths (0 m, -5 m, -10 m, -15 m, -20 m, -25 m, -30 m, -35 m -40 m). Besides these concentrations, physical parameters of the water (pH, turbidity, electrical conductivity, dissolved oxygen and temperature) were also measured. To determine the physical parameters in the monitored area, sampling was done from four different points of the area and then put together for analysis. These parameters were measured on site using portable equipment. The data on the analyzed concentrations indicate that at depths of less than 5.0 m, the NaCl concentration values are more than 250 g/L.

Explaining the Growth Potential of a Market Leader and Challenger: Evidence from Japan’s Telecommunications Services Industry

2021 ◽  
pp. 227853372198952
Author(s):  
Mostafa Saidur Rahim Khan ◽  
Naheed Rabbani
Keyword(s):  
High Growth ◽  
Growth Potential ◽  
Book Value ◽  
Good Investment ◽  
Growth Firms ◽  
Price Earnings Ratio ◽  
Equity Ratio ◽  
Market Leader ◽  
Services Industry ◽  
Telecommunications Services

This study examines the growth potential of the market leader and market challenger in Japan’s telecommunications services industry. We focus on Nippon Telegraph and Telephone Corporation (NTT) and KDDI, the market leader and challenger (respectively) in terms of sales revenue, total assets, and market share. Following finance literatures, we use higher values of price–earnings ratio (P/E) and market-to-book-value-of-equity ratio (MV/BV) as the indicators of growth potential. High growth firms have the potential to outperform the overall market over a significant period of time providing a good investment opportunity for retail and institutional investors. This study uses financial data of the NTT and KDDI from the period between 2001 and 2016 and applies several regression models to examine the growth potential of the market leader and market challenger in Japan’s telecommunications services industry. Using the P/E and MV/BV as indicators of growth potential, we show that the market challenger’s growth potential is significantly higher than that of the market leader, even after controlling for firm size, liquidity, profitability, leverage, cash flow, and age.

scholarly journals Seasonal changes in water quality and macrophytes and the impact of cattle on tropical floodplain waterholes

2012 ◽  
Vol 63 (9) ◽  
pp. 788 ◽  
Author(s):  
N. E. Pettit ◽  
T. D. Jardine ◽  
S. K. Hamilton ◽  
V. Sinnamon ◽  
D. Valdez ◽  
...  
Keyword(s):  
Water Quality ◽  
Seasonal Changes ◽  
Aquatic Macrophyte ◽  
Plant Cover ◽  
Critical Role ◽  
Dry Season ◽  
Nutrient Concentrations ◽  
Wet Season ◽  
Dry Tropics ◽  
The Impact

The present study indicates the critical role of hydrologic connectivity in floodplain waterholes in the wet–dry tropics of northern Australia. These waterbodies provide dry-season refugia for plants and animals, are a hotspot of productivity, and are a critical part in the subsistence economy of many remote Aboriginal communities. We examined seasonal changes in water quality and aquatic plant cover of floodplain waterholes, and related changes to variation of waterhole depth and visitation by livestock. The waterholes showed declining water quality through the dry season, which was exacerbated by more frequent cattle usage as conditions became progressively drier, which also increased turbidity and nutrient concentrations. Aquatic macrophyte biomass was highest in the early dry season, and declined as the dry season progressed. Remaining macrophytes were flushed out by the first wet-season flows, although they quickly re-establish later during the wet season. Waterholes of greater depth were more resistant to the effects of cattle disturbance, and seasonal flushing of the waterholes with wet-season flooding homogenised the water quality and increased plant cover of previously disparate waterholes. Therefore, maintaining high levels of connectivity between the river and its floodplain is vital for the persistence of these waterholes.

Cross-Border M&A Deals between CIS and Persian Gulf Countries

2015 ◽  
pp. 28-34
Author(s):  
A. Nagimova
Keyword(s):  
Persian Gulf ◽  
Joint Venture ◽  
High Growth ◽  
Growth Potential ◽  
Abu Dhabi ◽  
Investment Fund ◽  
Cross Border ◽  
Gulf Countries ◽  
Agriculture Industry ◽  
Good Potential

The article analyses cross-border mergers and acquisition deals (M&A-deals) between the CIS and Persian Gulf countries in the period from 1990 till the present day. The author defines distinctive features, number, value, status and transparency of such M&A-deals, estimates average deal value and volume of the largest M&A-deals. In addition, the author shows country, industry and type breakdown of M&A-deals. Then the author reviews the main cross-border M&A-deals by industries. In the financial sector the biggest M&A-deal is between the Ministry of finance of Abu-Dhabi and the Russian direct investment fund (RDIF), the two main players from the CIS side are RDIF and VTB. Then the author analyses M&A-deals in extractive sector, and defines the biggest project which is joint venture of LUKoil in Saudi Arabia. In the production sector Russian metallurgical companies are the main investors. In the transport and infrastructure sphere the biggest project is the building of international transit corridor between Uzbekistan, Turkmenistan, Iran and Oman. The main investor in port sector of CIS is DP World from UAE. The author defines the sectors with high growth potential of cross-border M&A-activity. These are energy, agriculture, construction and tourism. The most significant deals in these sectors are the acquisition of Russian Enel OGK-5 by Emirates investors, building of Abu Dhabi Plaza in Astana (Kazakhstan) with the highest tower in the whole Central Asia and Russian-Emirates partnership for the building of satellite city in Moscow region. As far as Persian Gulf countries are the largest foodstuff importers in the world the potential of M&A-deals in agriculture industry and prospects for CIS grain exporters are also high. In conclusion, the author resumes that the trend in the number of cross-border M&A-deals is positive and that a good potential for development of investment cooperation between countries exists.

Effects of Fe addition on sediment P dynamics in a eutrophic lake

2021 ◽  
Author(s):  
Melanie Münch ◽  
Rianne van Kaam ◽  
Karel As ◽  
Stefan Peiffer ◽  
Gerard ter Heerdt ◽  
...  
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Surface Water ◽  
Water Column ◽  
Sediment Cores ◽  
Surface Water Quality ◽  
Water Interface ◽  
Eutrophic Lakes ◽  
Fe Addition

<p>The decline of surface water quality due to excess phosphorus (P) input is a global problem of increasing urgency. Finding sustainable measures to restore the surface water quality of eutrophic lakes with respect to P, other than by decreasing P inputs, remains a challenge. The addition of iron (Fe) salts has been shown to be effective in removing dissolved phosphate from the water column of eutrophic lakes. However, the resulting changes in biogeochemical processes in sediments as well as the long-term effects of Fe additions on P dynamics in both sediments and the water column are not well understood.</p><p>In this study, we assess the impact of past Fe additions on the sediment P biogeochemistry of Lake Terra Nova, a well-mixed shallow peat lake in the Netherlands. The Fe-treatment in 2010 efficiently reduced P release from the sediments to the surface waters for 6 years. Since then, the internal sediment P source in the lake has been increasing again with a growing trend over the years.</p><p>In 2020, we sampled sediments at three locations in Terra Nova, of which one received two times more Fe during treatment than the other two. Sediment cores from all sites were sectioned under oxygen-free conditions. Both the porewaters and sediments were analysed for their chemical composition, with sequential extractions providing insight into the sediment forms of P and Fe. Additional sediment cores were incubated under oxic and anoxic conditions and the respective fluxes of P and Fe across the sediment water interface were measured.</p><p>The results suggest that Fe and P dynamics in the lake sediments are strongly coupled. We also find that the P dynamics are sensitive to the amount of Fe supplied, even though enhanced burial of P in the sediment was not detected. The results of the sequential extraction procedure for P, which distinguishes P associated with humic acids and Fe oxides, as well as reduced flux of Fe(II) across the sediment water interface in the anoxic incubations, suggest a major role of organic matter in the interaction of Fe and P in these sediments.</p><p>Further research will include investigations of the role of organic matter and sulphur in determining the success of Fe-treatment in sequestering P in lake sediments. Based on these data in combination with reactive transport modelling we aim to constrain conditions for successful lake restoration through Fe addition.</p>

scholarly journals Sediment Remediation for Ecosystem in Eutrophic Lakes

2002 ◽  
Vol 2 ◽  
pp. 885-891 ◽  
Author(s):  
Y. Amano ◽  
K. Taki ◽  
K. Murakami ◽  
T. Ishii ◽  
H. Matsushima
Keyword(s):  
Water Quality ◽  
Green Algae ◽  
Hybrid System ◽  
Size Reduction ◽  
Control Effect ◽  
Sediment Remediation ◽  
Eutrophic Lakes

The remediation method — namely, a hybrid system combined with DAF and CRM — is studied in this paper for the size reduction of aqua-ecological circulation and for the elution control in lakes. Results show that two effects on water quality purification, the sediment washout effect and the elution control effect, can be induced by this system, and the biota inhabiting the lake is therefore shifted into an oligotrophic aspect, from blue algae to green algae and/or diatoms.

scholarly journals Social Challenges of the Digital Economy: Russia in a Global Context

2021 ◽  
Vol 65 (9) ◽  
pp. 14-24
Author(s):  
E. Sadovaya
Keyword(s):  
Global Economy ◽  
Technological Development ◽  
High Growth ◽  
World Order ◽  
Digital Economy ◽  
Digital Transformation ◽  
Growth Potential ◽  
Raw Material ◽  
Soviet Period ◽  
Labor Resources

The subject of the research is the challenges of the digital economy for the employment sector in Russia. The need to reduce costs in the face of a deteriorating situation in the global economy is a factor in accelerating the digital transformation of employment in the country. The transformation is carried out through the automation of the main business processes, as well as through the development of platform employment formats. Specific features of the process of digital transformation of employment form the shape of the development of the Russian labor market in the post- Soviet period. Its main factor was the country’s entry into the global system of division of labor, which led to the formation of the modern structure of employment. The economy of Russia, recognized as raw material, turned out to be “commercial” in terms of employment, since it was this industry that created the bulk of jobs during that period. The commerce sector, which had high growth potential in the early 1990s in Russia, provided jobs for all those labor resources that were released from the industry. However, at the moment this source has been exhausted. Digitalization threatens the most labor-intensive sectors of the Russian economy. Commerce turns out to be the first industry to undergo automation and digitalization of jobs. At the same time, the most massive professions (accountants, bank employees, HR specialists, salesmen, cashiers, couriers, security guards, secretaries, packers, call center workers, drivers) are under the threat of “disappearance”, while new ones in demand by the market are more likely “unique” and they are mostly associated with robotization, digitalization and biotechnology. The unmet demand for these professions is a reflection of the complexities of training highly qualified interdisciplinary specialists and not a physical shortage of labor resources, and this is a serious challenge for the vocational education system. The study aims to gain a deeper understanding of the processes taking place in the social and labor sphere in Russia, to create a conceptual basis for the development of a socio-economic policy of the state that adequately responds to the challenges of the digitalization of the economy. Acknowledgements. The article was prepared within the project “Post-crisis world order: challenges and technologies, competition and cooperation” supported by the grant from Ministry of Science and Higher Education of the Russian Federation program for research projects in priority areas of scientific and technological development (Agreement № 075-15-2020-783).

scholarly journals Phytoplankton Community Investigation and Water Quality Assessment of M River in winter in Shijiazhuang City

2021 ◽  
Vol 267 ◽  
pp. 01035
Author(s):  
Ziqi Zhang ◽  
Lei Yang ◽  
Dongxu Han ◽  
Hongyan Shen
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Water Body ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Water Quality Assessment ◽  
Species Diversity Index ◽  
Wiener Diversity Index ◽  
Eutrophic Water ◽  
Evenness Index

An investigation of phytoplankton community and water quality for M River was conducted in December 2019.The results showed that 38 species of phytoplankton belonging to 6 phyla and 26 genera were collected. Among them, Bacillariophyta is the richest species, which accounted for 34.21%, followed by Cyanophyta with 26.32% and Chlorophyta with 28.95%. The density of phytoplankton was 63.0*106 inds/L which indicated as eutrophic water body. The highest density was Bacillariophyta, accounting for 51.03%. The Shannon-Wiener diversity index (H’) varied from 1.34 to 2.24, the Margalef Species diversity index (d) varied from 2.71 to 3.85, and the Pielou evenness index (J) varied from 0.38 to 0.67. According to the integrative analysis results of H’, d and J, M River water quality belongs to oligo-polluted, but individual sites belong to meso-polluted.

DESIGN AND VALUATION OF CORPORATE SECURITIES WITH STRATEGIC DEBT SERVICE AND ASYMMETRIC INFORMATION

1999 ◽  
Vol 02 (02) ◽  
pp. 201-219 ◽  
Author(s):  
YONGHUA PAN
Keyword(s):  
Asymmetric Information ◽  
Information Asymmetry ◽  
Risk Premium ◽  
High Growth ◽  
Cash Flows ◽  
Debt Service ◽  
Growth Potential ◽  
Unified Framework ◽  
Financing Decisions ◽  
Corporate Securities

This paper studies the effects of strategic debt service, asymmetric information and their interaction on the valuation of corporate securities and on corporate financing decisions. By introducing information asymmetry into a continuous-time setting, our model is able to integrate these two factors in a unified framework. Such a model allows for obtaining valuation results in a separating equilibrium. The basic results of this paper imply that the risk premium of debt could be partly contributed by information effect. This part of risk premium could be very significant for those good firms with a project which will produce much higher cash flows than what the market expects. We also find that a firm's financing decision depends on its primitives: firms are more apt to rely on equity if they have: (1) high growth potential, (2) riskier projects, (3) higher ratio of intangible assets to total assets and (4) lesser information asymmetry; firms would prefer debt, otherwise.

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