scholarly journals Beating the bugs: roles of microbial biofilms in corrosion

2013 ◽  
Vol 31 (3-6) ◽  
pp. 73-84 ◽  
Author(s):  
Kwan Li ◽  
Matthew Whitfield ◽  
Krystyn J. Van Vliet
Keyword(s):  
Fossil Fuel ◽  
Degradation Process ◽  
Bacterial Biofilm ◽  
Microbiologically Influenced Corrosion ◽  
Metal Alloys ◽  
Current Understanding ◽  
Material Degradation ◽  
Complex Type ◽  
Microbial Biofilms

AbstractMicrobiologically influenced corrosion (MIC) is a complex type of environmentally assisted corrosion. Although poorly understood and challenging to ameliorate, it is increasingly appreciated that MIC accelerates failure of metal alloys, including steel pipeline. Historically, this type of material degradation process has been treated from either an electrochemical materials perspective or a microbiological perspective. Here, we review the current understanding of MIC mechanisms for steel – particularly those in sour environments relevant to fossil fuel recovery and processing – and outline the role of the bacterial biofilm in both corrosion processes and mitigation responses.

The Role of Women in Pursuing Scottish Criminal Actions, 1580–1650

2020 ◽  
Vol 24 (2) ◽  
pp. 232-250
Author(s):  
Stephanie Dropuljic
Keyword(s):  
Early Modern ◽  
Legal History ◽  
Criminal Court ◽  
Current Understanding ◽  
The Law ◽  
Role Of Women

This article examines the role of women in raising criminal actions of homicide before the central criminal court, in early modern Scotland. In doing so, it highlights the two main forms of standing women held; pursing an action for homicide alone and as part of a wider group of kin and family. The evidence presented therein challenges our current understanding of the role of women in the pursuit of crime and contributes to an under-researched area of Scots criminal legal history, gender and the law.

Microbial Biofilms and Biotechnology – Some Perceptions

2020 ◽  
Vol 09 ◽  
Author(s):  
Subba Rao Toleti
Keyword(s):  
Tissue Culture ◽  
Synthetic Biology ◽  
Industrial Effluents ◽  
Aquatic Environments ◽  
Biochemical Processes ◽  
Microbial Biofilms ◽  
Biofilm Bacteria ◽  
Prophylactic Vaccines ◽  
Design Construction

: The review is an attempt to introduce the readers in brief about biofilms and their implications as well as some new perceptions in biotechnology. Biofilms are adherent microbial communities, which are developed on submerged surfaces in aquatic environments. Biofilms play a significant role in exopolymer production, material deterioration and also cause harmful infections. Further, the role of corrosion causing biofilm bacteria in deterioration of different materials, microbial biofilms and their enzymatic processes in reducing the toxicity of pollutants in industrial effluents are elaborated, along with clean technologies for wastewater treatment. Biotechnology is defined as any technological application that uses biological systems to synthesize or modify products or processes. The applications include biochemical processes, medical care, cell and tissue culture as well as synthetic biology and others. Synthetic biology details about the design, construction of new biological components and systems for useful purposes. Finally, to overcome the limitations that are inherent to the use of cellular host’s, cell-free systems as critical platforms for synthetic biology applications. This mini-review also mentions about new diagnostic products based on enzymes, monoclonal antibodies and engineered proteins as well as novel prophylactic vaccines.

scholarly journals The Role of the Reactive Species Involved in the Photocatalytic Degradation of HDPE Microplastics Using C,N-TiO2 Powders

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 999 ◽  
Author(s):  
Aranza Denisse Vital-Grappin ◽  
Maria Camila Ariza-Tarazona ◽  
Valeria Montserrat Luna-Hernández ◽  
Juan Francisco Villarreal-Chiu ◽  
Juan Manuel Hernández-López ◽  
...  
Keyword(s):  
Wastewater Treatment Plants ◽  
Reaction System ◽  
Terrestrial Ecosystems ◽  
Degradation Process ◽  
Reactive Species ◽  
Hazardous Substances ◽  
Wide Range ◽  
Degradation Behaviors ◽  
Environmentally Friendly Process

Microplastics (MPs) are distributed in a wide range of aquatic and terrestrial ecosystems throughout the planet. They are known to adsorb hazardous substances and can transfer them across the trophic web. To eliminate MPs pollution in an environmentally friendly process, we propose using a photocatalytic process that can easily be implemented in wastewater treatment plants (WWTPs). As photocatalysis involves the formation of reactive species such as holes (h+), electrons (e−), hydroxyl (OH●), and superoxide ion (O2●−) radicals, it is imperative to determine the role of those species in the degradation process to design an effective photocatalytic system. However, for MPs, this information is limited in the literature. Therefore, we present such reactive species’ role in the degradation of high-density polyethylene (HDPE) MPs using C,N-TiO2. Tert-butanol, isopropyl alcohol (IPA), Tiron, and Cu(NO3)2 were confirmed as adequate OH●, h+, O2●− and e− scavengers. These results revealed for the first time that the formation of free OH● through the pathways involving the photogenerated e− plays an essential role in the MPs’ degradation. Furthermore, the degradation behaviors observed when h+ and O2●− were removed from the reaction system suggest that these species can also perform the initiating step of degradation.

Structural comparisons of pyrodextrins during thermal degradation process: The role of hydrochloric acid

2021 ◽  
Vol 349 ◽  
pp. 129174
Author(s):  
Huijia Mao ◽  
Zhijun Chen ◽  
Jie Li ◽  
Xueyang Zhai ◽  
Hongyan Li ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Thermal Degradation ◽  
Degradation Process ◽  
Thermal Degradation Process

scholarly journals Current insights into the implications of m6A RNA methylation and autophagy interaction in human diseases

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xuechai Chen ◽  
Jianan Wang ◽  
Muhammad Tahir ◽  
Fangfang Zhang ◽  
Yuanyuan Ran ◽  
...  
Keyword(s):  
Intervertebral Disc Degeneration ◽  
Rna Binding ◽  
Rna Binding Proteins ◽  
Degradation Process ◽  
Human Diseases ◽  
Rna Modification ◽  
Rna Methylation ◽  
M6a Rna Methylation ◽  
The Impact

AbstractAutophagy is a conserved degradation process crucial to maintaining the primary function of cellular and organismal metabolism. Impaired autophagy could develop numerous diseases, including cancer, cardiomyopathy, neurodegenerative disorders, and aging. N6-methyladenosine (m6A) is the most common RNA modification in eukaryotic cells, and the fate of m6A modified transcripts is controlled by m6A RNA binding proteins. m6A modification influences mRNA alternative splicing, stability, translation, and subcellular localization. Intriguingly, recent studies show that m6A RNA methylation could alter the expression of essential autophagy-related (ATG) genes and influence the autophagy function. Thus, both m6A modification and autophagy could play a crucial role in the onset and progression of various human diseases. In this review, we summarize the latest studies describing the impact of m6A modification in autophagy regulation and discuss the role of m6A modification-autophagy axis in different human diseases, including obesity, heart disease, azoospermatism or oligospermatism, intervertebral disc degeneration, and cancer. The comprehensive understanding of the m6A modification and autophagy interplay may help in interpreting their impact on human diseases and may aid in devising future therapeutic strategies.

Distribution of Acidity and Alkalinity on Degraded Manuscripts Containing Iron Gall Ink

2015 ◽  
Vol 36 (3) ◽  
Author(s):  
Eva Marín ◽  
Maria Carme Sistach ◽  
Jessica Jiménez ◽  
Miguel Clemente ◽  
Guillem Garcia ◽  
...  
Keyword(s):  
Good Condition ◽  
Degradation Process ◽  
Degradation Processes ◽  
Alkaline Reserve ◽  
Hydrolysis Of Cellulose ◽  
Relevant Variables ◽  
Long Time ◽  
Iron Gall ◽  
The Stability

AbstractLong-time preservation of manuscripts depends on the stability of their support. One of the most important degradation processes of paper manuscripts containing iron gall ink is the acid hydrolysis of cellulose. The heterogeneity of the distribution of their constituent materials, together with the defined position of ink as a source of degradation agents, makes it difficult to obtain reliable and detailed information about degradation processes. The aim of this study is to contribute to the knowledge of the acid degradation process by looking at the distribution of relevant variables (pH, acidity and alkaline reserve) on real untreated iron gall ink containing manuscripts at different degradation stages. The study discusses the well-known differences between surface and cold extraction pH determination. It corroborates the relationship between pH, acidity and alkalinity and degradation stages, pointing out that acidity values for some manuscripts in apparent good condition are not far from those obtained for degraded manuscripts. The results indicate that in some partially degraded manuscripts, the coexistence of acid areas and areas with an alkaline reserve which do not participate in the neutralization process is possible. The role of water as a solvent for this equilibrium has also been evaluated.

Thermal degradation of polyimides—I. Investigation of the role of isoimide structure on degradation process

1979 ◽  
Vol 15 (4) ◽  
pp. 409-413 ◽  
Author(s):  
J. Zurakowska-Orszagh ◽  
T. Chreptowicz ◽  
A. Orzeszko ◽  
J. Kaminski
Keyword(s):  
Thermal Degradation ◽  
Degradation Process

Bacterial biofilm adherence to middle-ear ventilation tubes: scanning electron micrograph images and literature review

2007 ◽  
Vol 121 (10) ◽  
pp. 993-997 ◽  
Author(s):  
M Barakate ◽  
E Beckenham ◽  
J Curotta ◽  
M da Cruz
Keyword(s):  
Middle Ear ◽  
Bacterial Biofilm ◽  
Electron Micrograph ◽  
Ventilation Tube ◽  
Scanning Electron Micrograph ◽  
Chronic Infections ◽  
Middle Ear Ventilation ◽  
Conventional Antibiotics ◽  
Scanning Electron

Introduction: The organisms that cause many device-related and other chronic infections actually grow in biofilms in or on these devices. We sought to examine the role of biofilm formation in chronic middle-ear ventilation tube infection.Case report: Scanning electron micrograph images are presented which demonstrate biofilm on a middle-ear ventilation tube removed from a five-year-old child's chronically discharging ear. A review of the relevant international literature explores the role of biofilms in chronic infection and discusses potential intervention strategies.Conclusion: Biofilms may be responsible for chronic middle-ear ventilation tube infection that resists treatment with conventional antibiotics.

The Role of Musical Development in Early Language Acquisition

2018 ◽  
pp. 565-591
Author(s):  
Anthony Brandt ◽  
L. Robert Slevc ◽  
Molly Gebrian
Keyword(s):  
Language Acquisition ◽  
Cultural Transmission ◽  
Developmental Disorders ◽  
Native Language ◽  
Current Understanding ◽  
Early Language ◽  
Music And Language ◽  
Language And Music ◽  
Infant Brain

Language and music are readily distinguished by adults, but there is growing evidence that infants first experience speech as a special type of music. By listening to the phonemic inventory and prosodic patterns of their caregivers’ speech, infants learn how their native language is composed, later bootstrapping referential meaning onto this musical framework. Our current understanding of infants’ sensitivities to the musical features of speech, the co-development of musical and linguistic abilities, and shared developmental disorders, supports the view that music and language are deeply entangled in the infant brain and modularity emerges over the course of development. This early entanglement of music and language is crucial to the cultural transmission of language and children’s ability to learn any of the world’s tongues.

scholarly journals A short history of ocean acidification science in the 20th century: a chemist's view

2013 ◽  
Vol 10 (11) ◽  
pp. 7411-7422 ◽  
Author(s):  
P. G. Brewer
Keyword(s):  
Ocean Acidification ◽  
20Th Century ◽  
Fossil Fuel ◽  
Trade Offs ◽  
History Of ◽  
Chemical Knowledge ◽  
The Creation ◽  
Ph Scale ◽  
The Impact

Abstract. This review covers the development of ocean acidification science, with an emphasis on the creation of ocean chemical knowledge, through the course of the 20th century. This begins with the creation of the pH scale by Sørensen in 1909 and ends with the widespread knowledge of the impact of the "High CO2 Ocean" by then well underway as the trajectory along the IPCC scenario pathways continues. By mid-century the massive role of the ocean in absorbing fossil fuel CO2 was known to specialists, but not appreciated by the greater scientific community. By the end of the century the trade-offs between the beneficial role of the ocean in absorbing some 90% of all heat created, and the accumulation of some 50% of all fossil fuel CO2 emitted, and the impacts on marine life were becoming more clear. This paper documents the evolution of knowledge throughout this period.

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