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Anaerobic Digestion

Authors: --- --- --- --- et al.
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889456796 Year: Pages: 152 DOI: 10.3389/978-2-88945-679-6 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Microbiology --- General and Civil Engineering --- Biotechnology --- Environmental Sciences
Added to DOAB on : 2019-01-23 14:53:43
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Anaerobic digestion (AD) is a naturally-occurring biological process in soils, sediments, ruminants, and several other anoxic environments, that cycles carbon and other nutrients, and converts organic matter into a methane-rich gas. As a biotechnology, AD is now well-established for the treatment of the organic fraction of various waste materials, including wastewaters, but is also increasingly applied for an expanding range of organic feedstocks suitable for biological conversion to biogas. AD applications are classified in various ways, including on the basis of bioreactor design; and operating parameters, such as retention time, temperature, pH, total solids (TS) and volatile solids (VS) contents, and biodegradability of substrates. AD is an attractive bioenergy and waste / wastewater treatment technology. The advantages of AD for waste treatment include: production of a useable fuel (biogas/methane); possibility of high organic loading; reduced carbon footprint; and suitability for integration into a wide variety of process configurations and scales. Specifically, two important, and developing, applications exemplify the potential of AD technologies: (1) the integration of AD as the basis of the core technologies underpinning municipal wastewater, and sewage, treatment, to displace less sustainable, and more energy-intensive, aerobic biological treatment systems in urban water infrastructures; and (2) technical innovations for higher-rate conversions of high-solids wastestreams, and feedstocks, for the production of energy carriers (i.e. methane-biogas, but possibly also biohydrogen) and other industrially-relevant intermediates, such as organic acids.Internationally, the research effort to maximize AD biogas yield has increased ten-fold over the past decade. Depending on the feedstocks, bioreactor design and process parameters, fundamental and applied knowledge are still required to improve conversion rates and biogas yields. This Research Topic cover aspects related to AD processes, such as the effect of feedstock composition, as well as the effect of feedstock pre-treatment, bioreactor design and operating modes, on process efficiency; microbial community dynamics and systems biology; influence of macro- and micro-nutrient concentrations and availability; process control; upgrading and calibration of anaerobic digestion models (e.g. ADM1) considering the biochemical routes as well as the hydrodynamics in such ecosystems; and novel approaches to process monitoring, such as the development, and application, of novel, and rapid diagnostic assays, including those based on molecular microbiology. Detailed full-scale application studies were also particularly welcomed.

Wastewater Treatment and Reuse Technologies

Authors: --- ---
ISBN: 9783038971016 9783038971023 Year: Pages: 226 Language: Englisch
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Environmental Engineering
Added to DOAB on : 2018-08-27 15:22:12
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This edited volume is a collection of 12 publications from esteemed research groups around the globe. The articles belong to the following broad categories: biological treatment process parameters, sludge management and disinfection, removal of trace organic contaminants, removal of heavy metals, and synthesis and fouling control of membranes for wastewater treatment.

Wetlands for the Treatment of Agricultural Drainage Water

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ISBN: 9783038972082 9783038972099 Year: Pages: 150 DOI: 10.3390/books978-3-03897-209-9 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Environmental Engineering --- General and Civil Engineering
Added to DOAB on : 2018-10-11 10:44:12
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Agricultural drainage, such as runoffs from farmlands and wineries, are contaminated waters. Their management is monitored by environmental protection authorities who set targets of volume or pollutant reductions. Due to large quantities and seasonal variations, the targets are often not met, and effective management remains a problem in many parts of the world.Natural wetlands are known as the ‘kidneys’ of the earth with unique water purification functions that have long been recognized. Imitating the functions of natural wetlands, constructed wetlands are engineered systems purposely built to treat contaminated waters. They may therefore be called the ‘artificial kidneys’ of the earth. Rural areas often only have low-value lands available for constructed wetlands. Where large quantities of drainage are produced, farmlands are often adjacent to degraded natural wetlands that have reduced ecosystem functions. Controlled discharge and treatment in the wetlands can potentially be part of an integrated solution to multiple environmental problems.This book includes some recent studies on the fate of pollutants removed from agricultural drainage in wetlands, modelling of wetland performance, innovative systems, and the use of non-hazardous agricultural waste in constructed wetlands for wastewater treatment. These studies enhance our understanding of wetland systems, and will help develop wetland technology towards solving the problems associated with agricultural drainage.

Novel Therapeutic Targets and Emerging Treatments for Fibrosis

Authors: ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889453726 Year: Pages: 162 DOI: 10.3389/978-2-88945-372-6 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Therapeutics
Added to DOAB on : 2018-11-16 17:17:57
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For decades we have known that the overgrowth, hardening and scarring of tissues (so-called fibrosis) represents the final common pathway and best histological predictor of disease progression in most organs. Fibrosis is the culmination of both excess extracellular matrix deposition due to ongoing or severe injury, and a failure to regenerate. An inadequate wound repair process ultimately results in organ failure through a loss of function, and is therefore a major cause of morbidity and mortality in disease affecting both multiple and individual organs.Whilst the pathology of fibrosis and its significance are well understood, until recently we have known little about its molecular regulation. Current therapies are often indirect and non-specific, and only slow progression by a matter of months. The recent identification of novel therapeutic targets, and the development of new treatment strategies based on them, offers the exciting prospect of more efficacious therapies to treat this debilitating disorder.This Research Topic therefore compromises several up-to-date mini-reviews on currently known and emerging therapeutic targets for fibrosis including: the Transforming Growth Factor (TGF)-family; epigenetic factors; Angiotensin II type 2 (AT2) receptors; mineralocorticoid receptors; adenosine receptors; caveolins; and the sphingosine kinase/sphingosine 1-phosphate and notch signaling pathways. In each case, mechanistic insights into how each of these factors contribute to regulating fibrosis progression are described, along with how they can be targeted (by existing drugs, small molecules or other mimetics) to prevent and/or reverse fibrosis and its contribution to tissue dysfunction and failure. Two additional reviews will discuss various anti-fibrotic therapies that have demonstrated efficacy at the experimental level, but are not yet clinically approved; and the therapeutic potential vs limitations of stem cell-based therapies for reducing fibrosis while facilitating tissue repair. Finally, this Research Topic concludes with a clinical perspective of various anti-fibrotic therapies for cardiovascular disease (CVD), outlining limitations of currently used therapies, the pipeline of anti-fibrotics for CVD and why so many anti-fibrotic drugs have failed at the clinical level.

Adverse Effects of Cancer Chemotherapy: Anything New to Improve Tolerance and Reduce Sequelae?

Authors: --- ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889454822 Year: Pages: 245 DOI: 10.3389/978-2-88945-482-2 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Therapeutics --- Medicine (General) --- Oncology
Added to DOAB on : 2019-01-23 14:53:42
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Advances in anti-cancer chemotherapy over recent years have led to improved efficacy in curing or controlling many cancers. Some chemotherapy-related side-effects are well recognized and include: nausea, vomiting, bone marrow suppression, peripheral neuropathy, cardiac and skeletal muscle dysfunction and renal impairment. However, it is becoming clearer that some chemotherapy-related adverse effects may persist even in long term cancer survivors. Problems such as cognitive, cardiovascular and gastrointestinal dysfunction, and neuropathy may lead to substantial long term morbidity. Despite improvements in treatments to counteract acute chemotherapy-induced adverse effects, they are often incompletely effective. Furthermore, counter-measures for some acute side-effects and many potential longer term sequelae of anti-cancer chemotherapy have not been developed. Thus, new insights into prevalence and mechanisms of cancer chemotherapy-related side effects are needed and new approaches to improving tolerance and reduce sequelae of cancer chemotherapy are urgently needed.The present Research Topic focuses on adverse effects and sequelae of chemotherapy and strategies to counteract them.

Problem Gambling: Summarizing Research Findings and Defining New Horizons

Authors: --- --- --- --- et al.
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889456130 Year: Pages: 217 DOI: 10.3389/978-2-88945-613-0 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Psychology
Added to DOAB on : 2019-01-23 14:53:43
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In 2003, Rachel A. Volberg wrote: “Why is it that gambling is not even on the radar when we consider the array of risks that adolescents must confront as they move towards adulthood?” Nowadays, after thirteen years, although much more is known about this particular form of risk behavior, there is still a general tendency, at least among laypersons, to not perceive gambling as a potential danger for youth and other population segments (e.g., individuals with migration background, seniors, sports professionals). However, the latest edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5, American Psychological Association, 2013) included Gambling Disorder as the only condition in the Section Non-Substance-Related Disorders. Moreover, it is specified that the disorder can indeed occur in adolescence or young adulthood. Despite this fact, theoretical and applied research on problem gambling with regard to adolescence and other risk groups is still in its infancy.For this reason, it seems to be important to organize a Research Topic on gambling in Frontiers in Psychology in order to i) highlight the necessity of considering gambling as a potential harmful activity; ii) summarize the state-of-art of international research on different aspects of the topic; and iii) offer important novel findings relevant for advancing knowledge in the field of gambling. Different types of research articles will be provided including original articles, systematic/scoping reviews, meta-analyses, case reports, and commentaries. These contributions will be focused on the following most important areas in gambling research: Measurement (Which are the most widely used instruments to assess gambling-related problems as well as proximate constructs and what are their psychometric properties? Are there new instruments to detect adolescent problem gamblers?), Protective and risk factors (What do we know about ecological and individual influences on gambling behavior? Which factors affect problem gambling most and in which way?), Prevention (Which are the most promising prevention programs implemented until now? Which are necessary ingredients for effective prevention?), Treatment (When individuals seek help for their gambling-related problems, which are the clinical treatments that are offered? Do we have evidence for treatment effectiveness for different subgroups?).To try to fulfill this goal in the most comprehensive way, researchers from different countries and with specific competencies and interests will be contacted and encouraged to submit a contribution. Through the integration of international and multidisciplinary contributions, i) new challenges in the field of gambling will be identified (e.g., definition of specific at-risk groups, specification of effective interventions in terms of best practices) and ii) new research routes (e.g., the use of behavioral data) will be outlined in order to build a comprehensive understanding of problem gambling. The overall aim is to summarize the state of art, to propose original novel findings, and to outline new directions in gambling research.

Pediatric Venous Thromboembolism

Authors: --- ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889456390 Year: Pages: 116 DOI: 10.3389/978-2-88945-639-0 Language: English
Publisher: Frontiers Media SA
Subject: Medicine (General) --- Pediatrics
Added to DOAB on : 2019-01-23 14:53:43
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Venous thromboembolism (VTE) occurs less often in children than adults and therefore remains underrecognized despite increasing in incidence. Due to the risk of mortality, short- and long-term morbidity, and increased healthcare costs associated with pediatric VTE, this entity merits better understanding and consideration. With this Research Topic, we aim to highlight some special considerations of pediatric VTE, namely risk factors and epidemiology, rare types of pediatric thrombosis and considerations unique to specific clinical patient subgroups, approaches to management and treatment, and prevention

Ovarian Cancer Screening

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ISBN: 978038427162 9783038427155 Year: Pages: VI, 124 DOI: 10.3390/books978-3-03842-715-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Medicine (General)
Added to DOAB on : 2018-04-06 13:25:21
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Presented here are scientific reports which add considerable information to the area of early stage ovarian cancer detection and the application of this detection to ovarian cancer screening. In this volume, the following presentations are made:1) The performance of different ultrasound-based International Ovarian Tumor Analysis (IOTA) strategies is analyzed to discriminate between early stage ovarian malignancy and benign abnormalities of the ovary.2) Since oophorectomy confers protection against ovarian cancer, when adjustment for oophorectomy was made, rates of ovarian cancer were substantially higher.3) The frequency of symptoms relevant to ovarian cancer was found to be more than two-hundred times higher than the occurrence of ovarian cancer and it was found that 80.1% of women expressed confidence in the symptoms they reported.4) Complications resulting from surgery performed in the Kentucky Ovarian Cancer Screening Program were infrequent and significantly fewer than reported in the Prostate, Lung, Colorectal and Ovarian Cancer Screening trial. Complications observed were mostly minor (93%) and were more common in cancer versus non-cancer surgery.5) Arguments in favor of serial ultrasonography as an alternative to immediate surgery are presented and illustrate the benefits of surveillance.6) Ten critical considerations for ovarian cancer screening are presented in depth, highlighting their important bearing on ovarian screening outcomes and their interpretations.7) Considerations that have psychological and behavioral impacts on individuals participating in ovarian screening suggest that a “normal” screening test result can have psychological benefits, including an increased positive effect and beliefs in the efficacy of screening.8) The efficacy of ovarian cancer screening may be higher in Asia than in Europe and the USA. Additionally, the re-analysis of PLCO screening data, when cancers presenting more than one year after screening are excluded, shows a significant survival benefit in the PLCO screening trial.9) The effect that ovarian cancer has on patients and their families is examined from the perspective of a first-year resident in Obstetrics and Gynecology.10) The 50-year history of biomarkers and ultrasound in the context of ovarian cancer indicates the importance of serial application of both biomarkers and ultrasound. Taken together, this volume provides both original data and overviews of ovarian cancer screening studies that enhance the present interpretation of this type of screening.

Nutrition and Allergic Diseases

Authors: ---
ISBN: 9783038428497 9783038428503 Year: Pages: VIII, 256 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Allergy and Immunology
Added to DOAB on : 2018-04-20 15:57:56
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The purpose of this Special Issue, “Nutrition and Allergic Diseases”, is to provide an overview of the role of nutrition in allergy. The prevalence of asthma, rhinitis, and food allergy has increased tremendously over the last few decades. Is there a role for nutrition to help managing this global challenge? This Special Issue touches upon the many aspects that relate to nutrition and allergy and focuses on two fundamental questions:1) Can nutrition play a role in allergy prevention and induction?2) Can nutrition play a role in managing allergies?The topics covered range from the epidemiology of nutrition and allergy prevalence to the description of food components known to have beneficial effects on allergy, and include the importance of pregnancy and breastfeeding, the possibility of therapeutically targeting the microbiota in allergic diseases (with pre- or probiotics), the allergic effects of food processing, food allergies and related available treatments.

Advances in the Prevention and Management of Obesity and Eating Disorders

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ISBN: 9783038428534 9783038428541 Year: Pages: VIII, 192 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Medicine (General)
Added to DOAB on : 2018-05-18 12:02:38
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Obesity and eating disorders remain major public health concerns worldwide that often co-exist. While we are far from having definitive solutions, scientific insights into the prevention and management of obesity and eating disorders have developed significantly in recent years. This research has been stimulated by the continuous challenge of reducing the global burden of obesity and its commonly associated health complications, as well as the life-threatening characteristics of eating disorders. Looking towards better solutions for these pressing public health concerns, this book addresses recent scientific findings regarding the prevention and management of obesity and eating disorders. It reports on cognition and mental health in people with obesity, as well as on food addiction, co-morbidities of eating disorders, cultural aspects of eating, intermittent dietary energy restriction as a treatment for overweight or obesity, factors influencing the adherence to dietary treatments for overweight and obesity, philosophies underpinning dietary practices, treatment of eating disorders in men, cognitive remediation therapy for anorexia nervosa, and online or virtual interventions for weight management or bulimia nervosa. This book includes culturally diverse findings from research groups around the world (e.g. Australia, UK, Norway, Brazil), and is informative for healthcare professionals and researchers working in the fields of obesity and/or eating disorders.

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