{"title":"Role of psychrotrophic bacteria and cold-active enzymes in composting methods adopted in cold regions.","authors":"Vivek Manyapu, Ayush Lepcha, Sanjeev Kumar Sharma, Rakshak Kumar","doi":"10.1016/bs.aambs.2022.08.001","DOIUrl":"https://doi.org/10.1016/bs.aambs.2022.08.001","url":null,"abstract":"<p><p>Temperature-dependent composting is a challenging task but is worthy if it is done in the right manner. Cold composting has been known to be practiced since ancient times but there were not enough advancements to overcome the long mesophilic phase and bring the compost maturation to a short period. The composting processes that have been well practiced are discussed and the role of psychrotrophic bacteria that produce cold tolerant hydrolytic enzymes has been highlighted. In this chapter, the mechanism of substrate degradation has been elaborated to better understand the need of specific bacteria for a specific kind of substrate allowing fast and efficient decomposition. This chapter attempts to pave an appropriate way and suggest the best-suited method of composting for efficient production of compost by the conservation of heat in cold regions.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"121 ","pages":"1-26"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9137411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Gain-of-function research.","authors":"K P Saalbach","doi":"10.1016/bs.aambs.2022.06.002","DOIUrl":"https://doi.org/10.1016/bs.aambs.2022.06.002","url":null,"abstract":"<p><p>The term Gain-of-Function (GoF) describes the gain of new functions by organisms through genetic changes, which can naturally occur or by experimental genetic modifications. Gain-of-Function research on viruses is enhancing transmissibility, virus replication, virulence, host range, immune evasion or drug and vaccine resistance to get insights into the viral mechanisms, to create and analyze animal models, to accelerate drug and vaccine development and to improve pandemic preparedness. A subset is the GoF research of concern (GOFROC) on enhanced potentially pandemic pathogens (ePPPs) that could be harmful for humans. A related issue is the military use of research as dual-use research of concern (DURC). Influenza and coronaviruses are main research targets, because they cause pandemics by airborne infections. Two studies on avian influenza viruses initiated a global debate and a temporary GoF pause in the United States which ended with a new regulatory framework in 2017. In the European Union and China, GoF and DURC are mainly covered by the legislation for laboratory safety and genetically modified organisms. After the coronavirus outbreaks, the GoF research made significant advances, including analyses of modified MERS-like and SARS-like viruses and the creation of synthetic SARS-CoV-2 viruses as a platform to generate mutations. The GoF research on viruses will still play an important role in future, but the need to clarify the differences and overlaps between GoF research, GOFROC and DURC and the need for specialized oversight authorities are still debated.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"120 ","pages":"79-111"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10626343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Advances in microbial production of feed amino acid.","authors":"Kuo Zhao, Jianmin Liu, Cong Gao, Jia Liu, Xiulai Chen, Liming Liu, Liang Guo","doi":"10.1016/bs.aambs.2022.05.001","DOIUrl":"https://doi.org/10.1016/bs.aambs.2022.05.001","url":null,"abstract":"<p><p>Feed amino acids have numerous applications, and the market demand for them is likely to grow. Microbial cell factories promise the sustainable production of feed amino acids; however, their performance is significantly affected by the availability of precursors, carbon metabolic flux, and transporter systems. To circumvent these potential roadblocks, high-performance microbial cell factories have been constructed by strengthening the supply of precursors, increasing metabolic pathway flux, and engineering transporters. In this review, limiting factors and recent technical advances affecting the production of feed amino acids in microbial cell factories are discussed. In addition, existing challenges and potential strategies for increasing the output of these amino acids are described.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"119 ","pages":"1-33"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10358041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Joanna Jabłońska, Kamila Dubrowska, Marta Gliźniewicz, Oliwia Paszkiewicz, Adrian Augustyniak, Bartłomiej Grygorcewicz, Maciej Konopacki, Agata Markowska-Szczupak, Marian Kordas, Barbara Dołęgowska, Rafał Rakoczy
{"title":"The use of the electromagnetic field in microbial process bioengineering.","authors":"Joanna Jabłońska, Kamila Dubrowska, Marta Gliźniewicz, Oliwia Paszkiewicz, Adrian Augustyniak, Bartłomiej Grygorcewicz, Maciej Konopacki, Agata Markowska-Szczupak, Marian Kordas, Barbara Dołęgowska, Rafał Rakoczy","doi":"10.1016/bs.aambs.2022.08.002","DOIUrl":"https://doi.org/10.1016/bs.aambs.2022.08.002","url":null,"abstract":"<p><p>An electromagnetic field (EMF) has been shown to have various stimulatory or inhibitory effects on microorganisms. Over the years, growing interest in this topic led to numerous discoveries suggesting the potential applicability of EMF in biotechnological processes. Among these observations are stimulative effects of this physical influence resulting in intensified biomass production, modification of metabolic activity, or pigments secretion. In this review, we present the current state of the art and underline the main findings of the application of EMF in bioprocessing and their practical meaning in process engineering using examples selected from studies on bacteria, archaea, microscopic fungi and yeasts, viruses, and microalgae. All biological data are presented concerning the classification of EMF. Furthermore, we aimed to highlight missing parts of contemporary knowledge and indicate weak spots in the approaches found in the literature.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"121 ","pages":"27-72"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10638086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Uninvited Guests: a Chronology of Petri Dish Contaminations.","authors":"Gilbert Shama","doi":"10.1016/bs.aambs.2021.04.002","DOIUrl":"https://doi.org/10.1016/bs.aambs.2021.04.002","url":null,"abstract":"<p><p>Petri dish contaminations are commonplace and personally witnessed by every microbiologist. The vast majority of such contaminations result in nothing more than annoyance following which the Petri dishes are discarded. However, a handful of incidents of contaminations have led to momentous outcomes, the most renowned of which being that perceived by Alexander Fleming on the basis of the immense number of lives saved by penicillin. Petri dish contaminations as reported upon in the literature fall broadly into two categories; those in which the contaminant caused antagonism toward the species being cultured, and those in which the contaminant was established to be a species novum. Accounts of both of these categories of contaminations are set out here.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"116 ","pages":"169-200"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2021.04.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39279242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Molecular engineering to improve lignocellulosic biomass based applications using filamentous fungi.","authors":"Jiali Meng, Miia R Mäkelä, Ronald P de Vries","doi":"10.1016/bs.aambs.2020.09.001","DOIUrl":"https://doi.org/10.1016/bs.aambs.2020.09.001","url":null,"abstract":"<p><p>Lignocellulosic biomass is an abundant and renewable resource, and its utilization has become the focus of research and biotechnology applications as a very promising raw material for the production of value-added compounds. Filamentous fungi play an important role in the production of various lignocellulolytic enzymes, while some of them have also been used for the production of important metabolites. However, wild type strains have limited efficiency in enzyme production or metabolic conversion, and therefore many efforts have been made to engineer improved strains. Examples of this are the manipulation of transcriptional regulators and/or promoters of enzyme-encoding genes to increase gene expression, and protein engineering to improve the biochemical characteristics of specific enzymes. This review provides and overview of the applications of filamentous fungi in lignocellulosic biomass based processes and the development and current status of various molecular engineering strategies to improve these processes.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"114 ","pages":"73-109"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2020.09.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38871890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Biological treatments of mercury and nitrogen oxides in flue gas: biochemical foundations, technological potentials, and recent advances.","authors":"Zhenshan Huang, Zaishan Wei, Meiru Tang, Shan Yu, Huaiyong Jiao","doi":"10.1016/bs.aambs.2021.04.001","DOIUrl":"https://doi.org/10.1016/bs.aambs.2021.04.001","url":null,"abstract":"<p><p>Nitrogen oxides (NO<sub>x</sub>) and mercury (Hg) are commonly found coexistent pollutants in combustion flue gas. Ever-increasing emission of atmospheric Hg and NO<sub>x</sub> has caused considerable environmental risks. Traditional flue gas demercuration and denitration techniques have many socioeconomic, technological and environmental drawbacks. Biotechnologies can be a promising and prospective alternative strategy. This article discusses theoretical foundation (biochemistry and genomic basis) and technical potentials (Hg<sup>0</sup> bio-oxidation coupled to denitrification) of bioremoval of Hg and NO<sub>x</sub> in flue gas and summarized recent experimental and technological advances. Finally, several specific technical perspectives have been put forward to better guide future researches.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"116 ","pages":"133-168"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39279241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of functional oligosaccharides and their derivatives through cocultivation and cellular NTP regeneration.","authors":"Jianrong Wu, Ruoyu Yang, Minjie Gao, Hongtao Zhang, Xiaobei Zhan","doi":"10.1016/bs.aambs.2021.02.002","DOIUrl":"https://doi.org/10.1016/bs.aambs.2021.02.002","url":null,"abstract":"<p><p>Carbohydrates play an important role in the life cycle. Among them, functional oligosaccharides show a complex and diverse structures with unique physiological activities and biological functions. However, different preparation methods directly affect the structure, molecular weight, and other functions of oligosaccharides, as well as their application fields and manufacturing costs. In the preparation of β-1,3-glucan oligosaccharides (OBGs), water insolubility of β-1,3-glucans hampers the hydrolysis efficiency. The synthesis of some functional oligosaccharides requires the consumption of energy substrates, such as ATP, CTP, and uridine triphosphate, for sugar nucleotide synthesis, leading to increased capital costs. A more economical solution to solve energy supply is to adopt microbial cocultivation or cellular nucleoside triphosphate regeneration. This review focused on the sources, preparation methods, biological activities of OBG, and the cultivation methods and applications of microbial cocultivation and fermentation. We also reviewed the preparation methods of other functional oligosaccharides, such as sialylated oligosaccharides, β-nicotinamide mononucleotide, and α-galacto-oligosaccharides.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"115 ","pages":"35-63"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2021.02.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39242243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Lipid production by oleaginous yeasts.","authors":"Atrayee Chattopadhyay, Mrinal K Maiti","doi":"10.1016/bs.aambs.2021.03.003","DOIUrl":"https://doi.org/10.1016/bs.aambs.2021.03.003","url":null,"abstract":"<p><p>Microbial lipid production has been studied extensively for years; however, lipid metabolic engineering in many of the extraordinarily high lipid-accumulating yeasts was impeded by inadequate understanding of the metabolic pathways including regulatory mechanisms defining their oleaginicity and the limited genetic tools available. The aim of this review is to highlight the prominent oleaginous yeast genera, emphasizing their oleaginous characteristics, in conjunction with diverse other features such as cheap carbon source utilization, withstanding the effect of inhibitory compounds, commercially favorable fatty acid composition-all supporting their future development as economically viable lipid feedstock. The unique aspects of metabolism attributing to their oleaginicity are accentuated in the pretext of outlining the various strategies successfully implemented to improve the production of lipid and lipid-derived metabolites. A large number of in silico data generated on the lipid accumulation in certain oleaginous yeasts have been carefully curated, as suggestive evidences in line with the exceptional oleaginicity of these organisms. The different genetic elements developed in these yeasts to execute such strategies have been scrupulously inspected, underlining the major types of newly-found and synthetically constructed promoters, transcription terminators, and selection markers. Additionally, there is a plethora of advanced genetic toolboxes and techniques described, which have been successfully used in oleaginous yeasts in the recent years, promoting homologous recombination, genome editing, DNA assembly, and transformation at remarkable efficiencies. They can accelerate and effectively guide the rational designing of system-wide metabolic engineering approaches pinpointing the key targets for developing industrially suitable yeast strains.</p>","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":"116 ","pages":"1-98"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2021.03.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39279240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}