Abstract：
:Fungal mycelial by-products from fermentation industries present a considerable affinity for soluble metal ions (e.g. Zn, Cd, Ni, Pb, Cr, Ag) and could be used in biosorption processes for purification of contaminated effluents. In this work the influence of pH on sorption parameters is characterized by measuring the isotherms of five heavy metals (Ni, Zn, Cd, Ag and Pb) with Rhizopus arrhizus biomass under pH-controlled conditions. The maximum sorption capacity for lead was observed at pH 7.0 (200 mg g-1), while silver uptake was weakly affected. The stability of metal-biosorbent complexes is regularly enhanced by pH neutralization, except for lead. A transition in sorption mechanism was observed above pH 6.0. In addition, comparison of various industrial fungal biomasses (R. arrhizus, Mucor miehei and Penicillium chrysogenum) indicated important variations in zinc-binding and buffering properties (0.24, 0.08 and 0.05 mmol g-1, respectively). Without control, the equilibrium pH (5.8, 3.9 and 4.0) is shown to be related to the initial calcium content of the biosorbent. pH neutralization during metal adsorption increases zinc sorption in all fungi (0.57, 0.52 and 0.33 mmol g-1) but an improvement was also obtained (0.34, 0.33 and 0.10 mmol g-1) by calcium saturation of the biomass before heavy metal accumulation. Breakthrough curves of fixed bed biosorbent columns demonstrated the capacity of the biosorbent process to purify zinc and lead solutions in continuous-flow systems, and confirmed the necessity for cationic activation of the biosorbent before contact with the heavy-metal solution.
journal_name
FEMS Microbiol Revjournal_title
FEMS microbiology reviewsauthors
Fourest E,Canal C,Roux JCdoi
10.1111/j.1574-6976.1994.tb00106.xsubject
Has Abstractpub_date
1994-08-01 00:00:00pages
325-32issue
4eissn
0168-6445issn
1574-6976journal_volume
14pub_type
杂志文章abstract：:Perhaps the biggest single task facing a bacterial cell is to divide into daughter cells that contain the normal complement of chromosomes. Recent technical and conceptual breakthroughs in bacterial cell biology, combined with the flood of genome sequence information and the excellent genetic tools in several model sy...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2000.tb00554.x
更新日期：2000-10-01 00:00:00
abstract：:Antibiotic resistance can be acquired by mutation or horizontal transfer of a resistance gene, and generally an acquired mechanism results in a predictable increase in phenotypic resistance. However, recent findings suggest that the environment and/or the genetic context can modify the phenotypic expression of specifi...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1093/femsre/fux004
更新日期：2017-05-01 00:00:00
abstract：:Respiratory syncytial virus is the major respiratory pathogen of infants and children worldwide, with no effective treatment or vaccine available. Steady progress has been made in understanding the respiratory syncytial virus life cycle and the consequences of infection, but many areas of respiratory syncytial virus b...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2006.00025.x
更新日期：2006-09-01 00:00:00
abstract：:Phenotypically heterogeneous microenvironments emerge as biofilms mature across different environments. Phenotypic heterogeneity in biofilm sub-populations not obeying quorum sensing-dictated, collective group behavior may be considered as a strategy allowing non-conformists to survive hostile conditions. Heterogeneou...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1093/femsre/fuy001
更新日期：2018-05-01 00:00:00
abstract：:A high frequency of human cytomegalovirus (HCMV) genome and antigens in tumor samples of patients with different malignancies is now well documented, although the causative role for HCMV in the development of the neoplasias remains to be established. HCMV infection can modulate multiple cellular regulatory and signall...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1016/j.femsre.2003.07.005
更新日期：2004-02-01 00:00:00
abstract：:The yeast Saccharomyces cerevisiae has been a favorite organism for pioneering studies on nutrient-sensing and signaling mechanisms. Many specific nutrient responses have been elucidated in great detail. This has led to important new concepts and insight into nutrient-controlled cellular regulation. Major highlights i...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/1574-6976.12065
更新日期：2014-03-01 00:00:00
abstract：:In recent years, there has been accumulating evidence that antibiotics, besides their antimicrobial action, potentially have a number of undesired side effects that can, at least in some cases, promote genetic variability of bacteria. In addition to resistant variants, antibiotics have also been shown to select mutato...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2009.00165.x
更新日期：2009-05-01 00:00:00
abstract：:In the present review, we aim to provide a general introduction to different facets of the arms race between pathogens and their hosts/environment, emphasizing its evolutionary aspects. We focus on vector-borne parasitic protozoa, which have to adapt to both invertebrate and vertebrate hosts. Using Leishmania, Trypano...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1093/femsre/fuw018
更新日期：2016-09-01 00:00:00
abstract：:Small regulatory RNAs have been identified in a wide range of organisms, where they modify mRNA stability, translation or protein function. Small RNA regulators (sRNAs) either pair with mRNA targets or modify protein activities. Here we discuss current knowledge of the various proteins that interact with RNA regulator...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2007.00079.x
更新日期：2007-09-01 00:00:00
abstract：:The P(II) proteins are one of the most widely distributed families of signal transduction proteins in nature. They are pivotal players in the control of nitrogen metabolism in bacteria and archaea, and are also found in the plastids of plants. Quite remarkably, P(II) proteins control the activities of a diverse rang...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2012.00351.x
更新日期：2013-03-01 00:00:00
abstract：:Legionella pneumophila is naturally found in fresh water were the bacteria parasitize within protozoa. It also survives planctonically in water or biofilms. Upon aerosol formation via man-made water systems, L. pneumophila can enter the human lung and cause a severe form of pneumonia, called Legionnaires' disease. The...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2002.tb00607.x
更新日期：2002-06-01 00:00:00
abstract：:Our knowledge regarding the nature and development of microbial biofilms has grown significantly since the first report of these communities by Antonie van Leeuwenhoek in the late 1600s. Nevertheless, most biofilm studies examine mono-species cultures, whereas nearly all biofilm communities in nature comprise a variet...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2012.00325.x
更新日期：2012-09-01 00:00:00
abstract：:Five species of parasite cause malaria in humans with the most severe disease caused by Plasmodium falciparum. Many of the proteins encoded in the P. falciparum genome are unusually enriched in repetitive low-complexity sequences containing a limited repertoire of amino acids. These repetitive sequences expand and con...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1093/femsre/fux046
更新日期：2017-11-01 00:00:00
abstract：:The initiation of transcription is the most important step for gene regulation in eubacteria. To initiate transcription, RNA polymerase has to associate with a small protein, known as a sigma-factor. The sigma-factor directs RNA polymerase to a specific class of promoter sequences. Most bacterial species synthesize se...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.1998.tb00364.x
更新日期：1998-09-01 00:00:00
abstract：:Lipopeptides constitute a structurally diverse group of metabolites produced by various bacterial and fungal genera. In the past decades, research on lipopeptides has been fueled by their antimicrobial, antitumour, immunosuppressant and surfactant activities. However, the natural functions of lipopeptides in the lifes...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2010.00221.x
更新日期：2010-11-01 00:00:00
abstract：:Natural genetic transformation is widely distributed in bacteria. It is a genetically programmed process that is inherent to the species. Transformation requires a specialized membrane-associated machinery for uptake of exogenous double-stranded DNA. It also requires dedicated cytosolic proteins, some of which have be...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2009.00164.x
更新日期：2009-05-01 00:00:00
abstract：:For many years, the bacterial cells were regarded as tiny vessels lacking internal organization. This view, which stemmed from the scarcity of membrane-bounded organelles, has changed considerably in recent years, mainly due to advancements in imaging capabilities. Consequently, despite the rareness of conventional or...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2012.00348.x
更新日期：2012-09-01 00:00:00
abstract：:The genome of bacteriophage fd has been engineered to allow foreign amino acid sequences to be displayed in the exposed N-terminal segment of the major coat protein in the virus particle: small peptides can be encoded directly; larger peptides are encoded in hybrid virions, in which wild-type coat protein subunits are...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.1995.tb00184.x
更新日期：1995-08-01 00:00:00
abstract：:More than a century ago, the term 'virus' was introduced to describe infectious agents that are invisible by light microscopy and capable of passing through sterilizing filters. In addition to their extremely small size, most viruses have minimal genomes and gene contents, and rely almost entirely on host cell-encoded...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1093/femsre/fuv037
更新日期：2015-11-01 00:00:00
abstract：:A number of peptidases and proteases have been identified in Escherichia coli. Although their specific physiological roles are often not known, some of them have been shown to be involved in: the maturation of nascent polypeptide chains; the maturation of protein precursors; the signal peptide processing of exported p...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1016/0168-6445(89)90035-1
更新日期：1989-09-01 00:00:00
abstract：:The herbivore rumen ecosystem constitutes an extremely efficient degradation machinery for the intricate chemical structure of fiber biomass, thus, enabling the hosting animal to digest its feed. The challenging task of deconstructing and metabolizing fiber is performed by microorganisms inhabiting the rumen. Since mo...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1093/femsre/fuz007
更新日期：2019-07-01 00:00:00
abstract：:We review and update the work on genetic elements, e.g., viruses and plasmids (exluding IS elements and transposons) in the kingdom Crenarchaeota (Thermoproteales and Sulfolobales) and the orders Thermococcales and Thermoplasmales in the kingdom Euryarchaeota of the archael domain, including unpublished data from our ...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.1996.tb00239.x
更新日期：1996-05-01 00:00:00
abstract：:N-Substituted aromatic compounds are environmental contaminants associated with the production and use of dyes, explosives, pesticides and pharmaceuticals. In this article, we examine the potential of anaerobic granular sludge from anaerobic treatment systems towards the detoxification, transformation, and mineralizat...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章
doi：10.1111/j.1574-6976.1997.tb00335.x
更新日期：1997-07-01 00:00:00
abstract：:Most bacteria pathogenic for humans have closely related nonpathogenic counterparts that live as saprophytes, commensals or even symbionts (mutualists) in similar or different habitats. The knowledge of how these bacteria adapt their metabolism to the preferred habitats is critical for our understanding of pathogenesi...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.2011.00301.x
更新日期：2012-03-01 00:00:00
abstract：:The peroxisomal membrane compartmentalizes specific metabolic functions in the intermediary metabolism of various aerobic eukarya. In yeast, peroxisomal membranes are typified by their small width (+/- 7-8 nm) and absence of large integral membrane proteins in freeze-etch replicas. They show a unique polypeptide profi...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6976.1993.tb00002.x
更新日期：1993-08-01 00:00:00
abstract：:Thioredoxin is a small (Mr 12,000) ubiquitous redox protein with the conserved active site structure: -Trp-Cys-Gly-Pro-Cys-. The oxidized form (Trx-S2) contains a disulfide bridge which is reduced by NADPH and thioredoxin reductase; the reduced form [Trx(SH)2] is a powerful protein disulfide oxidoreductase. Thioredoxi...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1574-6968.1988.tb02747.x
更新日期：1988-12-01 00:00:00
abstract：:Many fungi produce exocellular beta-glucan-degrading enzymes, the beta-glucanases including the noncellulolytic beta-(1,3)- and beta-(1,6)-glucanases, degrading beta-(1,3)- and beta-(1,6)-glucans. An ability to purify several exocellular beta-glucanases attacking the same linkage type from a single fungus is common, a...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章
doi：10.1111/j.1574-6976.2006.00055.x
更新日期：2007-03-01 00:00:00
abstract：:Understanding the structure, functionalities and biology of functional amyloids is an issue of emerging interest. Inclusion bodies, namely protein clusters formed in recombinant bacteria during protein production processes, have emerged as unanticipated, highly tunable models for the scrutiny of the physiology and arc...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章,评审
doi：10.1093/femsre/fuy038
更新日期：2019-01-01 00:00:00
abstract：:Stress responses are crucial for bacteria to survive harmful conditions that they encounter in the environment. Although gene regulatory mechanisms underlying stress responses in bacteria have been thoroughly characterised for decades, recent advances in imaging technologies helped to uncover previously hidden dynamic...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章
doi：10.1093/femsre/fuaa022
更新日期：2020-09-01 00:00:00
abstract：:Bacillus thuringiensis is a well-known biopesticide that has been used for more than 80 years. This spore-forming bacterium belongs to the group of Bacillus cereus that also includes, among others, emetic and diarrheic pathotypes of B. cereus, the animal pathogen Bacillus anthracis and the psychrotolerant Bacillus wei...
journal_title：FEMS microbiology reviews
pub_type： 杂志文章
doi：10.1093/femsre/fuy034
更新日期：2018-11-01 00:00:00
