Role of organic components in regulating denitrification in the coastal water of Daya Bay, southern China

2019 ◽  
Vol 21 (5) ◽  
pp. 831-844 ◽  
Author(s):  
Jian Zeng ◽  
Min Chen ◽  
Laodong Guo ◽  
Hui Lin ◽  
Xinyue Mu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Coastal Water ◽  
Particulate Organic Matter ◽  
Southern China ◽  
Dominant Role ◽  
Daya Bay ◽  
Organic Components ◽  
The Impact

The impact of dissolved and particulate organic mater on coastal water denitrification is evaluated. Particulate organic matter and its composition play a dominant role in regulating denitrifying activity.

scholarly journals Organisation design and the role of ICT: Negative effects of working from home during the coronavirus pandemic

2021 ◽  
Vol 16 (1) ◽  
pp. 1-12
Author(s):  
Ernad Kahrović ◽  
Emina Kahrović
Keyword(s):  
Dominant Role ◽  
Organization Design ◽  
Negative Effects ◽  
Work From Home ◽  
Working From Home ◽  
New Organizational Forms ◽  
The Creation ◽  
Impact Of Technology ◽  
The Impact

The goal of the paper is to point to the role and importance of organization design as a tool for strategy implementation, together with a dominant, role of technology in shaping the design. Namely, the development, of modern information and communication technology (ICT) is accompanied by the creation of new organizational forms, which enable the management, and employees to carry out, a significant, portion of work from home. The central focus of this paper is the impact, of technology on the creation of new forms of design, with a virtual organization taking up a particularly prominent, position. We underline the fact, that, among many changes that, the coronavirus pandemic has produced in everyday life, working from home can be considered as the most, drastic one; hence, its harmful effects are underscored, such as those relating to negative psychological effects, anxiety disorders, health issues, job loss, decreased efficiency and reduced satisfaction of the employees.

Impact of Heavy Metals on Benthic Oligochaete Communities in the River Ill and Its Tributaries

1994 ◽  
Vol 29 (3) ◽  
pp. 241-248 ◽  
Author(s):  
A. Rosso ◽  
M. Lafont ◽  
A. Exinger
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Organic Matter ◽  
Reproductive Strategy ◽  
Organic Micropollutants ◽  
Rhine Basin ◽  
Metal Contents ◽  
The Impact ◽  
The City

The aim of this research is to describe the impact of heavy metals contaminating sediments on oligochaete communities. Sediments were collected three times (June, August, October 1991) for chemical and biological analyses in 15 sites situated in the river I11 and its tributaries (Rhine Basin, France). The sediments are characterized by high contents of heavy metals, mainly Hg, Cu, Cr, Pb, Zn from below the city of Mulhouse. The majority of sediments are heavily loaded with organic matter and organic micropollutants are also present. Oligochaete communities are rich in species. However five species only, considered as pollution-tolerant or opportunist, are significantly present and abundant. The percentages of Tubificidae without hair setae are positively related to heavy metal contents of the sediments, and the percentages of Tubificidae with hair setae are negatively related. Several species such as N. communis, N. barbata, D. digitata and Bothrioneurum sp. are considered as tolerant to heavy metals; on the contrary L. claparedeanus, L. udekemianus, Stylodrilus sp. and S. josinae are considered as intolerant. The reproductive strategy of oligochaetes in contaminated areas and the role of organic matter are discussed. Several recommendations are given for the rehabilitation of the investigated sites.

The ISSMGE Kerry Rowe Lecture: The role of diffusion in environmental geotechnics

2014 ◽  
Vol 51 (11) ◽  
pp. 1219-1242 ◽  
Author(s):  
Charles D. Shackelford
Keyword(s):  
Liquid Phase ◽  
Dominant Role ◽  
Compacted Clay ◽  
Clay Liners ◽  
Permeable Membrane ◽  
Waste Containment ◽  
Phase Diffusion ◽  
High Level ◽  
The Impact

Diffusion of contaminants can play a significant if not dominant role in many applications encountered within the field of environmental geotechnics. The objective of this paper is to provide an overview of the important role diffusion plays in such applications. The presentation proceeds from a historical perspective, beginning with the recognition in the late 1970s to early 1980s that diffusion may be an important process in assessing contaminant migration through low-permeability barriers in waste containment applications. Data from the literature and simplified model simulations are used to illustrate under what conditions diffusion is important, and the significance of diffusion is illustrated with respect to different barrier components and types of barriers used in waste containment applications. The barriers considered include natural clays, compacted clay liners, geomembranes, geosynthetic clay liners, composite liners, vertical cutoff walls, subaqueous caps for contaminated sediments, and highly compacted bentonite buffers for high-level radioactive waste containment. The significance of semi-permeable membrane behavior on liquid-phase diffusion through bentonite-based barriers also is highlighted. The potential importance of matrix diffusion as an attenuation mechanism for contaminant transport is illustrated, and the roles of both liquid-phase and gas-phase diffusion under unsaturated conditions are discussed. Finally, the role of diffusion in terms of remediation applications is illustrated via an example analysis illustrating the impact of reverse matrix or back diffusion on the effectiveness of pump-and-treat remediation, as well as via a summary of several diffusion-based models commonly used to describe the leaching of contaminants from a variety of stabilized–solidified waste forms.

scholarly journals The role of log jams and exceptional flood events in mobilizing coarse particulate organic matter in a steep headwater stream

2015 ◽  
Vol 3 (1) ◽  
pp. 173-196 ◽  
Author(s):  
M. Jochner ◽  
J. M. Turowski ◽  
A. Badoux ◽  
M. Stoffel ◽  
C. Rickli
Keyword(s):  
Organic Matter ◽  
Particulate Organic Matter ◽  
Strong Relationship ◽  
Headwater Stream ◽  
Return Periods ◽  
Flood Events ◽  
Coarse Particulate Organic Matter ◽  
Effective Barrier ◽  
Over Time

Abstract. Export rates of coarse particulate organic matter (CPOM) from mountain catchments have been observed to strongly increase with rising discharge, but the mechanism leading to this strong relationship is unclear. Here, we show that log jams in the Erlenbach, a steep headwater stream in the Swiss Prealps, are an effective barrier for the transport of CPOM pieces, and thus become sites of storage of large quantities of material over time. Exceptional discharge events with return periods exceeding 20 years play a dual role in CPOM transport. First, they destroy existing log jams, releasing the stored material (wood and sediment). Second, they intensify channel-hillslope coupling, thereby recruiting new logs to the channel, around which new jams can form.

scholarly journals Hegemony of Network Capabilities, Frugal Innovation and Innovation Strategies: The Innovation Performance Perspective

2021 ◽  
Vol 14 (1) ◽  
pp. 2
Author(s):  
Mohamed Haffar ◽  
Rasim Ozcan ◽  
Magdalena Radulescu ◽  
Nicoleta Isac ◽  
Abdelmohsen A. Nassani
Keyword(s):  
Small And Medium Enterprises ◽  
Dominant Role ◽  
Innovation Performance ◽  
Mediating Effect ◽  
Successful Operation ◽  
Frugal Innovation ◽  
Innovation Strategies ◽  
Medium Enterprises ◽  
The Impact

The emergence of advanced technologies has brought new challenges and opportunities for all kinds of business organizations. In a technologically advanced era, innovation plays a dominant role for the successful operation of the commercial landscape. Therefore, the current study was conducted to investigate the impact of network capabilities (NC) and frugal innovation (FI) on innovation performance (IP). Furthermore, the mediating role of FI and moderating role of innovation strategies has also been tested on the link between NC and IP. Small and medium enterprises (SMEs) registered with small and medium enterprises development authorities (SMEDA) were approached for the completion of the current study. Only 509 owner/managers agreed to participate. A quantitative research design was employed for the current study. During the two–three months process of data collection only 387 complete responses were received from the SMEs working in Pakistan’s big cities. Correlation, regression and bootstrap methods were applied to test the study hypotheses. The findings revealed that NC positively affect FI and IP. Furthermore, the findings also confirmed the mediating effect of FI between NC and IP link. The performance of SMEs working in emerging economies is largely based on their innovative activities. In this dynamic scenario SMEs’ survival is attached to continuous IP in their products and services.

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