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Bacterial Physiological Phenomena (2):
Recent article
Bacterial Physiological Phenomena
Abstract
We depleted the intestinal microbiota of mice with antibiotics before inoculation with poliovirus, an enteric virus. Antibiotic-treated mice were less susceptible to poliovirus disease and supported minimal viral replication in the intestine. Exposure to bacteria or their N-acetylglucosamine-contain...
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PMID: 21998395
PDF is available here.
PDF is available here.
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Abstract
We found that MMTV, when ingested by newborn mice, stimulates a state of unresponsiveness toward viral antigens. This process required the intestinal microbiota, as antibiotic-treated mice or germ-free mice did not transmit infectious virus to their offspring. MMTV-bound bacterial lipopolysaccharide...
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PMID: 21998394
PDF is available here.
PDF is available here.
Abstract
Abstract
Efficient nutrient removal in decentralized wastewater treatment systems is a challenging task. To improve the removal of organic matter and nitrogen from wastewater, two types of bioreactors using membrane-aerated biofilm reactor (MABR) and microbial fuel cell (MFC) techniques were evaluated. During...
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PMID: 21905409
PDF is available here.
PDF is available here.
Abstract
We show using a kinetic model that Hfq can efficiently and robustly achieve this difficult task by minimizing the sequestration of sRNAs and target mRNAs in Hfq complexes. This sequestration can be reduced by two non-mutually exclusive kinetic mechanisms. The first mechanism involves heterotropic co...
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PMID: 21876666
PDF is available here.
PDF is available here.
Abstract
We investigated the trophosome of S. contortum from the Gulf of Mexico, using light and electron microscopy. We show that this organ derives from the visceral mesoderm and propose that the trophosome of the sister clade Vestimentifera and Sclerolinum is a homologous character. Like that of juvenile...
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PMID: 21551450
PDF is available here.
PDF is available here.
Abstract
We used fluorescence in situ hybridization (FISH) to test which of these four candidates occur with the limpet's symbiotic gill bacteria. The γ-proteobacterial probes consistently hybridized to the entire area where symbiotic bacteria were found, but fluorescence signal from the ε-proteobacterial...
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PMID: 21551448
PDF is available here.
PDF is available here.
Abstract
We argue for a consistent name for the symbiont-housing tissue, namely trophosome, as in other siboglinids. In this study we provide morphological evidence that in Osedax the bacteriocytes are derived from somatic mesoderm. We show that the trophosome in Osedax is an apolar tissue composed of bacter...
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PMID: 21551449
PDF is available here.
PDF is available here.
Abstract
We show that a stochastic process of halving followed by addition can yield a stationary distribution that resembles the universal lognormal distribution with a certain width. The mechanism that we propose here would provide insight into the essence of why lognormal-like distributions in many system...
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PMID: 21517465
PDF is available here.
PDF is available here.
Abstract
We provide an exact analytical solution of the collapse dynamics of self-gravitating Brownian particles and bacterial populations at zero temperature. These systems are described by the Smoluchowski-Poisson system or Keller-Segel model in which the diffusion term is neglected. As a result, the dynam...
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PMID: 21517478
PDF is available here.
PDF is available here.
Abstract
We identify a previously uncharacterized type of bacterial communication mediated by nanotubes that bridge neighboring cells. Using Bacillus subtilis as a model organism, we visualized transfer of cytoplasmic fluorescent molecules between adjacent cells. Additionally, by coculturing strains harborin...
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PMID: 21335240
PDF is available here.
PDF is available here.
Abstract
The aim of this study was to identify the culturable endophytic bacteria recovered from the Populus euphratica at the disused (122 years ago) ancient Ugan river of middle reachs of Tarim river, and to understand their Phylogenetic diversity and community structure.
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PMID: 21574378
PDF is available here.
PDF is available here.
Abstract
To review the evidence for the presence of bacterial biofilms in chronic rhinosinusitis (CRS) and mechanisms by which they may contribute to the chronic inflammation characteristic of this disease. Lastly, to provide an overview of the current and potential future treatments for bact...
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PMID: 21150431
PDF is available here.
PDF is available here.
Abstract
Bacteria have developed multiple complex mechanisms ensuring an adequate response to environmental changes. In this context, bacterial cell division and growth are subject to strict control to ensure metabolic balance and cell survival. A plethora of studies cast light on toxin-antit...
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PMID: 21394325
PDF is available here.
PDF is available here.
Abstract
These results suggest that Cu/ZnSOD may play a larger role than MnSOD as a superoxide anion scavenger against oxidative stress in H. cunea.
Copyright © 2010 Elsevier Inc. All rights reserved....
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PMID: 20728562
PDF is available here.
PDF is available here.
Abstract
Mixotrophy is the occurrence of phagotrophy and phototrophy in the same organism. In ciliates the intracellular phototroph can be unicellular green algae (zoochlorellae), dinoflagellates (zooxanthellae), cryptomonads or sequestered chloroplasts from ingested algae. An intermediate mixotrophic mechan...
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PMID: 20970377
PDF is available here.
PDF is available here.
Abstract
We present a method using generalized linear mixed models in a multilevel modeling framework to analyze patterns of variances and correlations in binomially distributed prevalence data. We then apply it to a multi-lake, multiyear data set involving two Daphnia host species and nine microparasite spe...
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PMID: 21141193
PDF is available here.
PDF is available here.
Abstract
We determined that posttranslational modification and expression of amino-acid sequence variants change as a function of biofilm maturation. For Cytochrome₅₇₉ (Cyt₅₇₉), the most abundant cytochrome in the biofilms, late developmental-stage biofilms differed from early-stage biofilms in N...
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PMID: 20485387
PDF is available here.
PDF is available here.
Abstract
We cover our current understanding of the structure, assembly, function, and regulation of bacterial actins. We focus on ParM as a well-understood reductionist model and on MreB as a central organizer of multiple aspects of bacterial cell biology. We also discuss the outstanding puzzles in the field...
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PMID: 20630996
PDF is available here.
PDF is available here.
Trends in Microbiology (18)9 2010
Abstract
We review the diversity, metabolic characteristics, geomicrobiology and biogeochemistry of the deep-sea piezophiles.
Copyright 2010 Elsevier Ltd. All rights reserved....
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PMID: 20663673
PDF is available here.
PDF is available here.
Theory in Biosciences (129)2-3 2010
Abstract
Symbiosis has long been associated with saltational evolutionary change in contradistinction to gradual Darwinian evolution based on gene mutations and recombination between individuals of a species, as well as with super-organismal views of the individual in contrast to the classical one-genome: on...
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PMID: 20535601
PDF is available here.
PDF is available here.
Theory in Biosciences (129)2-3 2010
Abstract
When new entities are formed by the integration of individual organisms, these new entities possess characteristics which go beyond the sum of the individual properties of each element of the association, resulting in the development of new attributes and capacities as an integrated whole. In this p...
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PMID: 20549382
PDF is available here.
PDF is available here.
Abstract
Most cells in the body have the ability to change their physical locations during physiologic or pathologic events such as inflammation, wound healing, or cancer. When cell migration is directed toward sources of cue chemicals, the process is known as chemotaxis, and it requires linking the sensing...
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PMID: 20450351
PDF is available here.
PDF is available here.
Abstract
Experimental evidence collected more than 20 years ago in different laboratories suggests that the interactions between live biological cells and micro- and nanoparticles depend on their metabolic state. These experiments were conducted by reputable groups, led by prominent leaders such as H. Pohl o...
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PMID: 20637326
PDF is available here.
PDF is available here.
Abstract
We present in this review, advances on the molecular basis for the crack-entry infection process involved in the peanut-rhizobia interaction, the diversity of rhizobial and fungal antagonistic bacteria associated with peanut plants, the effect of abiotic and biotic stresses on this interaction and t...
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PMID: 20214416
PDF is available here.
PDF is available here.
Abstract
Interaction of plant growth promoting rhizobacteria (PGPR) with host plants is an intricate and interdependent relationship involving not only the two partners but other biotic and abiotic factors of the rhizosphere region. Survival and establishment of PGPR in the rhizosphere is a major concern of...
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PMID: 20635858
PDF is available here.
PDF is available here.
Abstract
We focus on the impact of pathogenic and commensal bacteria on IBD-like pathogenesis in mouse infection models and summarize important recent developments....
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PMID: 20622892
PDF is available here.
PDF is available here.
Bioresource Technology (101)15 2010
Abstract
In order to confirm the effect of ozonation on fouling mitigation in long-term membrane bioreactors (MBRs), parallel operation of two MBRs with and without ozonation was repeated in triplicate with different dosing modes. A number of mixed liquor properties and removal of pollutants in both MBRs wer...
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PMID: 20335026
PDF is available here.
PDF is available here.
Bioresource Technology (101)15 2010
Abstract
A full-scale combined biological system is used for the treatment of treated wastewater discharged from a pharmaceutical industrial park. This treated water is rich in NH(4)(+)-N (average in 86.4 mg/L), low in COD/NH(4)(+)-N (average in 3.4) and low in BOD(5)/COD ratio (average in 0.24) with pH vary...
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PMID: 20335031
PDF is available here.
PDF is available here.
Bioresource Technology (101)15 2010
Abstract
Factorial designs were employed to analyze the inhibitory effects of acetic, butyric, lactic, and propionic acids on composting microorganisms. Compost samples were withdrawn on different days of composting and treated with acids alone and in combination (at 0 and 0.5 mmol/g). Microorganisms were en...
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PMID: 20363618
PDF is available here.
PDF is available here.
Bioresource Technology (101)15 2010
Abstract
Although activated sludge (AS)-biofilm system has many advantages, it lacks in the mathematical concepts for its design. This paper deals with deducing a mathematical model for the simulation of ammonical nitrogen in such systems starting from the basic mass balance equations. Monod kinetic equation...
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PMID: 20338756
PDF is available here.
PDF is available here.
Abstract
Wastewater and soil samples were collected from the industrial area of Ghaziabad City, India from January 2005 to December 2007 and were analyzed for the presence of heavy metals by atomic absorption spectrophotometry. Test samples revealed high levels of Fe, Cr, Cu, Ni, Zn, and Cd as 967.03, 34.63,...
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PMID: 19548097
PDF is available here.
PDF is available here.
Cell Host & Microbe (8)1 2010
Abstract
The gastrointestinal epithelium deploys multiple innate defense mechanisms to fight microbial intruders, including epithelial integrity, rapid epithelial cell turnover, quick expulsion of infected cells, autophagy, and innate immune responses. Nevertheless, many bacterial pathogens a...
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PMID: 20638639
PDF is available here.
PDF is available here.
Abstract
We observed attraction toward microscale pulses of DMSP and related compounds among several motile strains of phytoplankton, heterotrophic bacteria, and bacterivore and herbivore microzooplankton. Because microbial DMSP cycling is the main natural source of cloud-forming sulfur aerosols, our results...
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PMID: 20647471
PDF is available here.
PDF is available here.
Abstract
We find that the most common algorithms used to generate the ensemble from the real network change subgraph counts in a highly correlated manner, such that one subgraph's status as a motif may not be independent from the statuses of the other subgraphs. We demonstrate this effect for the problem of...
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PMID: 20866662
PDF is available here.
PDF is available here.
Nucleic Acids Research (38)12 2010
Abstract
We mine co-occurrences in the scientific literature to construct such a network and demonstrate an expected pattern of association between the species' lifestyle and the recorded number of co-occurring partners. We further focus on the well-annotated gut community and show that most co-occurrence in...
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PMID: 20194113
PDF is available here.
PDF is available here.
Journal of Fluorescence (20)4 2010
Abstract
Bacteria in acidophilic biofilm communities, i.e. acid streamers and snottites, obtained from a subsurface mine in Königstein were visualized by fluorescence microscopy using four new fluorescent dyes (DY-601XL, V07-04118, V07-04146, DY-613). The pH of the bulk solution in which these bacteria thri...
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PMID: 20386966
PDF is available here.
PDF is available here.
Journal of Bacteriology (192)13 2010
Abstract
Abstract
The molecular and ultrastructural profiles of the symbionts found in the midgut and ileum of Cephalotes atratus, Cephalotes clypeatus, and Cephalotes pusillus were determined using the V3 region of the bacterial 16S rDNA gene and transmission electron microscopy (T.E.M.). Two samples of C. atratus,...
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PMID: 20202856
PDF is available here.
PDF is available here.
Abstract
Conditions that sustain constant bacterial growth are seldom found in nature. Oligotrophic environments and competition among microorganisms force bacteria to be able to adapt quickly to rough and changing situations. A particular lifestyle composed of continuous cycles of growth and...
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PMID: 20236330
PDF is available here.
PDF is available here.
Abstract
We are just beginning to understand the dynamics of its individual components. Here we measure the stoichiometry and turnover of FliM in functioning flagellar motors, by using high-resolution fluorescence microscopy of E. coli expressing genomically encoded YPet derivatives of FliM at physiological...
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PMID: 20498085
PDF is available here.
PDF is available here.
Abstract
We stably transformed Escherichia coli Nissle 1917 (Nissle) to express the autoinducer molecule cholera autoinducer 1 (CAI-1) (shown previously to prevent virulence when present with another signaling molecule, autoinducer 2, at high concentrations) and determined the effect on Vibrio cholerae virul...
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PMID: 20534565
PDF is available here.
PDF is available here.
Abstract
Abstract
We integrated extensive proteomic, geochemical, and biological information from 28 microbial communities collected from an acid mine drainage environment and representing a range of biofilm development stages and geochemical conditions to evaluate how the physiologies of the dominant and less abunda...
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PMID: 20531404
PDF is available here.
PDF is available here.
Lab On a Chip (10)11 2010
Abstract
Handling microorganisms in high throughput and their deployment into miniaturized platforms presents significant challenges. Contact printing can be used to create dense arrays of viable microorganisms. Such "living arrays", potentially with multiple identical replicates, are useful in the selection...
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PMID: 20480106
PDF is available here.
PDF is available here.
Biosystems (100)3 2010
Abstract
An individual-based model (IbM) for bacterial adaptation and evolution, COSMIC-Rules, has been employed to simulate interactions of virtual temperate bacteriophages (phages) and their bacterial hosts. Outcomes of infection mimic those of a phage such as lambda, which can enter either the lytic or ly...
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PMID: 20211223
PDF is available here.
PDF is available here.
Biosystems (100)3 2010
Abstract
Most of evolutionary algorithms (EAs) are based on a fixed population. However, due to this feature, such algorithms do not fully explore the potential of searching ability and are time consuming. This paper presents a novel nature-inspired heuristic optimization algorithm: bacterial foraging algori...
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PMID: 20347927
PDF is available here.
PDF is available here.
Journal of Bacteriology (192)12 2010
Abstract
Abstract
Probiotics are usually defined as products which contain viable non-pathogenic micro-organisms able to confer health benefits to the host. There are specific gastrointestinal effects of probiotics such as alleviating inflammatory bowel disease, reducing acute diarrhoea in children, inhibiting Salmon...
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PMID: 20403231
PDF is available here.
PDF is available here.
ISME Journal (4)5 2010
Abstract
We review over a decade of research on one such system-acid mine drainage biofilm communities. We discuss the value and limitations of tractable model microbial communities in developing molecular methods for microbial ecology and in uncovering principles that may explain behavior in more complex sy...
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PMID: 20164865
PDF is available here.
PDF is available here.
Microbiology (156)Pt 5 2010
Abstract
Many bacteria are motile by means of flagella, semi-rigid helical filaments rotated at the filament's base and energized by proton or sodium-ion gradients. Torque is created between the two major components of the flagellar motor: the rotating switch complex and the cell-wall-associated stators, whi...
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PMID: 20203052
PDF is available here.
PDF is available here.
Abstract
Bacterial colonization of dentine is of high relevance in cariology, endodontology and periodontology. The aim of the present in situ study was to establish recent methods for visualization and quantification of initial bacterial adherence to dentine in comparison to enamel. For this purpose, bovine...
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PMID: 20211207
PDF is available here.
PDF is available here.
Medicina Clínica (134)10 2010
Abstract
We examine current data on the role of iron in the struggle between host and pathogen to regulate levels of this essential element. We hope that, in the near future, treatments aimed at reducing iron overload will improve the response to current therapies, and help control infection.
Copyright 2009...
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PMID: 20044111
PDF is available here.
PDF is available here.
Abstract
We show that mice genetically deficient in Toll-like receptor 5 (TLR5), a component of the innate immune system that is expressed in the gut mucosa and that helps defend against infection, exhibit hyperphagia and develop hallmark features of metabolic syndrome, including hyperlipidemia, hypertension...
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PMID: 20203013
PDF is available here.
PDF is available here.
Abstract
Biotechnology Letters (32)4 2010
Abstract
A single-compartmented microbial fuel cell composed of a graphite felt anode modified with Neutral Red (NR-anode) and a porous Fe(II)-carbon cathode (FeC-cathode) were compared for electricity generation from Microbacterium sp. and Pseudomonas sp. under identical conditions. Pseudomonas sp. was more...
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PMID: 20013300
PDF is available here.
PDF is available here.
Abstract
Despite being considered a relatively simple form of life, bacteria have revealed a high degree of structural organization, with the spatial destination of their components precisely regulated within the cell. Nevertheless, the primary signals that dictate differential distribution of cellular build...
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PMID: 20138002
PDF is available here.
PDF is available here.
Abstract
Various modeling and experimental studies have analyzed the reactions, interconnections, and motifs in two-component systems, with an eye toward understanding their physiological implications and the differences between alternative designs. Examples where recent progress has been made include aspect...
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PMID: 20149717
PDF is available here.
PDF is available here.
Abstract
We show that a peroxidase, secreted by the Anopheles gambiae midgut, and dual oxidase form a dityrosine network that decreases gut permeability to immune elicitors. This network protects the microbiota by preventing activation of epithelial immunity. It also provides a suitable environment for malar...
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PMID: 20223948
PDF is available here.
PDF is available here.