Bacterial Physiological Phenomena: Physiological processes and properties of BACTERIA.Dental Physiological Phenomena: Physiological processes and properties of the DENTITION.Digestive System and Oral Physiological Phenomena: Properties and processes of the DIGESTIVE SYSTEM and DENTITION as a whole or of any of its parts.Reproductive and Urinary Physiological Phenomena: Physiology of the human and animal body, male or female, in the processes and characteristics of REPRODUCTION and the URINARY TRACT.Musculoskeletal and Neural Physiological Phenomena: Properties, and processes of the MUSCULOSKELETAL SYSTEM and the NERVOUS SYSTEM or their parts.Circulatory and Respiratory Physiological Phenomena: Functional processes and properties characteristic of the BLOOD; CARDIOVASCULAR SYSTEM; and RESPIRATORY SYSTEM.Integumentary System Physiological Phenomena: The properties and relationships and biological processes that characterize the nature and function of the SKIN and its appendages.Sports Nutritional Physiological Phenomena: Nutritional physiology related to EXERCISE or ATHLETIC PERFORMANCE.Reproductive Physiological Phenomena: Physiological processes, factors, properties and characteristics pertaining to REPRODUCTION.Physiological Phenomena: The functions and properties of living organisms, including both the physical and chemical factors and processes, supporting life in single- or multi-cell organisms from their origin through the progression of life.Elder Nutritional Physiological Phenomena: Nutritional physiology of adults aged 65 years of age and older.Urinary Tract Physiological Phenomena: Properties, functions, and processes of the URINARY TRACT as a whole or of any of its parts.Musculoskeletal Physiological Phenomena: Processes and properties of the MUSCULOSKELETAL SYSTEM.Virus Physiological Phenomena: Biological properties, processes, and activities of VIRUSES.Digestive System Physiological Phenomena: Properties and processes of the DIGESTIVE SYSTEM as a whole or of any of its parts.Blood Physiological Phenomena: Physiological processes and properties of the BLOOD.Adolescent Nutritional Physiological Phenomena: Nutritional physiology of children aged 13-18 years.Ocular Physiological Phenomena: Processes and properties of the EYE as a whole or of any of its parts.Nervous System Physiological Phenomena: Characteristic properties and processes of the NERVOUS SYSTEM as a whole or with reference to the peripheral or the CENTRAL NERVOUS SYSTEM.Cell Physiological Phenomena: Cellular processes, properties, and characteristics.Respiratory Physiological Phenomena: Physiological processes and properties of the RESPIRATORY SYSTEM as a whole or of any of its parts.Skin Physiological Phenomena: The functions of the skin in the human and animal body. It includes the pigmentation of the skin.Prenatal Nutritional Physiological Phenomena: Nutrition of FEMALE during PREGNANCY.Plant Physiological Phenomena: The physiological processes, properties, and states characteristic of plants.Cardiovascular Physiological Phenomena: Processes and properties of the CARDIOVASCULAR SYSTEM as a whole or of any of its parts.Maternal Nutritional Physiological Phenomena: Nutrition of a mother which affects the health of the FETUS and INFANT as well as herself.Child Nutritional Physiological Phenomena: Nutritional physiology of children aged 2-12 years.Nutritional Physiological Phenomena: The processes and properties of living organisms by which they take in and balance the use of nutritive materials for energy, heat production, or building material for the growth, maintenance, or repair of tissues and the nutritive properties of FOOD.Infant Nutritional Physiological Phenomena: Nutritional physiology of children from birth to 2 years of age.Raynaud Disease: An idiopathic vascular disorder characterized by bilateral Raynaud phenomenon, the abrupt onset of digital paleness or CYANOSIS in response to cold exposure or stress.

Osmosensing by bacteria: signals and membrane-based sensors. (1/1292)

Bacteria can survive dramatic osmotic shifts. Osmoregulatory responses mitigate the passive adjustments in cell structure and the growth inhibition that may ensue. The levels of certain cytoplasmic solutes rise and fall in response to increases and decreases, respectively, in extracellular osmolality. Certain organic compounds are favored over ions as osmoregulatory solutes, although K+ fluxes are intrinsic to the osmoregulatory response for at least some organisms. Osmosensors must undergo transitions between "off" and "on" conformations in response to changes in extracellular water activity (direct osmosensing) or resulting changes in cell structure (indirect osmosensing). Those located in the cytoplasmic membranes and nucleoids of bacteria are positioned for indirect osmosensing. Cytoplasmic membrane-based osmosensors may detect changes in the periplasmic and/or cytoplasmic solvent by experiencing changes in preferential interactions with particular solvent constituents, cosolvent-induced hydration changes, and/or macromolecular crowding. Alternatively, the membrane may act as an antenna and osmosensors may detect changes in membrane structure. Cosolvents may modulate intrinsic biomembrane strain and/or topologically closed membrane systems may experience changes in mechanical strain in response to imposed osmotic shifts. The osmosensory mechanisms controlling membrane-based K+ transporters, transcriptional regulators, osmoprotectant transporters, and mechanosensitive channels intrinsic to the cytoplasmic membrane of Escherichia coli are under intensive investigation. The osmoprotectant transporter ProP and channel MscL act as osmosensors after purification and reconstitution in proteoliposomes. Evidence that sensor kinase KdpD receives multiple sensory inputs is consistent with the effects of K+ fluxes on nucleoid structure, cellular energetics, cytoplasmic ionic strength, and ion composition as well as on cytoplasmic osmolality. Thus, osmoregulatory responses accommodate and exploit the effects of individual cosolvents on cell structure and function as well as the collective contribution of cosolvents to intracellular osmolality.  (+info)

Bacterial resistance to antimicrobial agents: an overview from Korea. (2/1292)

Antimicrobial resistance of bacteria has become a worldwide problem. Available data suggest that the resistance problem is comparatively more serious in Korea. In large hospitals, the proportion of methicillin-resistant Staphylococcus aureus (MRSA) has been reported at over 70%, and of penicillin-nonsusceptible Streptococcus pneumoniae at around 70%. Infection or colonization of vancomycin-resistant enterococci has started to increase. Extended-spectrum beta-lactamase producing Escherichia coli and Klebsiella pneumoniae has become widespread and even carbapenem-resistant Pseudomonas aeruginosa has been increasing. Community-acquired pathogens such as Salmonella, Shigella and Neisseria gonorrhoeae are often resistant to various antimicrobial agents. The prevalence of resistant bacteria can lead to erroneous empirical selection of either noneffective or expensive drugs, prolonging hospitalization and higher mortality. The emergence and spread of resistant bacteria are unavoidable unless antimicrobial agents are not used at all. The high prevalence of resistant bacteria in Korea seems to be related to antibiotic usage: 1) easy availability without prescription at drug stores, 2) injudicious use in hospitals, and 3) uncontrolled use in agriculture, animal husbandry, and fisheries. Nosocomial infection is an important factor in the spread of resistant bacteria. Antimicrobial resistance problems should be regarded as the major public health concern in Korea. It is urgently required to ban the sale of antibiotics without prescription, to use antibiotics more judiciously in hospitals by intensive teaching of the principles of the use of antibiotics, and to establish better control measures of nosocomial infections. Regulation of antimicrobials for other than human use should also be required. These issues are not easy to address and require the collective action of governments, the pharmaceutical industry, health care providers, and consumers.  (+info)

Korean Nationwide Surveillance of Antimicrobial Resistance of bacteria in 1997. (3/1292)

Antimicrobial-resistant bacteria are known to be prevalent in tertiary-care hospitals in Korea. Twenty hospitals participated to this surveillance to determine the nationwide prevalence of resistance bacteria in 1997. Seven per cent and 26% of Escherichia coli and Klebsiella pneumoniae were resistant to 3rd-generation cephalosporin. Increased resistance rates, 19% of Acinetobacter baumannii to ampicillin/sulbactam, and 17% of Pseudomonas aeruginoa to imipenem, were noted. The resistance rate to fluoroquinolone rose to 24% in E. coli, 56% in A. baumannii and 42% in P. aeruginosa. Mean resistance rates were similar in all hospital groups: about 17% of P. aeruginosa to imipenem, 50% of Haemophilus influenzae to ampicillin, 70% of Staphylococcus aureus to methicillin, and 70% of pneumococci to penicillin. In conclusion, nosocomial pathogens and problem resistant organisms are prevalent in smaller hospitals too, indicating nosocomial spread is a significant cause of the increasing prevalence of resistant bacteria in Korea.  (+info)

Thiorhodospira sibirica gen. nov., sp. nov., a new alkaliphilic purple sulfur bacterium from a Siberian soda lake. (4/1292)

A new purple sulfur bacterium was isolated from microbial films on decaying plant mass in the near-shore area of the soda lake Malyi Kasytui (pH 9.5, 0.2% salinity) located in the steppe of the Chita region of south-east Siberia. Single cells were vibrioid- or spiral-shaped (3-4 microns wide and 7-20 microns long) and motile by means of a polar tuft of flagella. Internal photosynthetic membranes were of the lamellar type. Lamellae almost filled the whole cell, forming strands and coils. Photosynthetic pigments were bacteriochlorophyll a and carotenoids of the spirilloxanthin group. The new bacterium was strictly anaerobic. Under anoxic conditions, hydrogen sulfide and elemental sulfur were used as photosynthetic electron donors. During growth on sulfide, sulfur globules were formed as intermediate oxidation products. They were deposited outside the cytoplasm of the cells, in the peripheral periplasmic space and extracellularly. Thiosulfate was not used. Carbon dioxide, acetate, pyruvate, propionate, succinate, fumarate and malate were utilized as carbon sources. Optimum growth rates were obtained at pH 9.0 and optimum temperature was 30 degrees C. Good growth was observed in a mineral salts medium containing 5 g sodium bicarbonate l-1 without sodium chloride. The new bacterium tolerated up to 60 g sodium chloride l-1 and up to 80 g sodium carbonates l-1. Growth factors were not required. The DNA G + C composition was 56.0-57.4 mol%. Based on physiological, biochemical and genetic characteristics, the newly isolated bacterium is recognized as a new species of a new genus with the proposed name Thiorhodospira sibirica.  (+info)

Rhodovulum iodosum sp. nov. and Rhodovulum robiginosum sp. nov., two new marine phototrophic ferrous-iron-oxidizing purple bacteria. (5/1292)

Two new strains of marine purple bacteria, N1T and N2T, were isolated from coastal sediment of the North Sea (Germany) with ferrous iron as the only electron donor for anoxygenic photosynthesis. The isolates are the first salt-dependent, ferrous-iron-oxidizing purple bacteria characterized so far. Analysis of 16S rRNA gene sequences revealed an affiliation with the genus Rhodovulum, which until now comprises only marine species. The sequence similarity of both strains was 95.2%, and their closest relative was Rhodovulum adriaticum. Like all known Rhodovulum species, the new strains had ovoid to rod-shaped cells, contained bacteriochlorophyll a and carotenoids of the spheroidene series, and were able to oxidize sulfide and thiosulfate. Like Rhodovulum adriaticum, both strains were unable to assimilate sulfate; for growth they needed a reduced sulfur source, e.g. thiosulfate. In contrast to the new strains, none of the known Rhodovulum species tested was able to oxidize ferrous iron or iron sulfide. In growth experiments, strains N1T and N2T oxidized 65 and 95%, respectively, of the ferrous iron supplied. Electron diffraction analysis revealed ferrihydrite as the main product of ferrous iron oxidation. In addition, traces of magnetite were formed. Strains N1T (= DSM 12328T) and N2T (= DSM 12329T) are described as Rhodovulum iodosum sp. nov. and Rhodovulum robiginosum sp. nov., respectively.  (+info)

PAS domains: internal sensors of oxygen, redox potential, and light. (6/1292)

PAS domains are newly recognized signaling domains that are widely distributed in proteins from members of the Archaea and Bacteria and from fungi, plants, insects, and vertebrates. They function as input modules in proteins that sense oxygen, redox potential, light, and some other stimuli. Specificity in sensing arises, in part, from different cofactors that may be associated with the PAS fold. Transduction of redox signals may be a common mechanistic theme in many different PAS domains. PAS proteins are always located intracellularly but may monitor the external as well as the internal environment. One way in which prokaryotic PAS proteins sense the environment is by detecting changes in the electron transport system. This serves as an early warning system for any reduction in cellular energy levels. Human PAS proteins include hypoxia-inducible factors and voltage-sensitive ion channels; other PAS proteins are integral components of circadian clocks. Although PAS domains were only recently identified, the signaling functions with which they are associated have long been recognized as fundamental properties of living cells.  (+info)

Identification and characterization of a flagellin gene from the endosymbiont of the hydrothermal vent tubeworm Riftia pachyptila. (7/1292)

The bacterial endosymbionts of the hydrothermal vent tubeworm Riftia pachyptila play a key role in providing their host with fixed carbon. Results of prior research suggest that the symbionts are selected from an environmental bacterial population, although a free-living form has been neither cultured from nor identified in the hydrothermal vent environment. To begin to assess the free-living potential of the symbiont, we cloned and characterized a flagellin gene from a symbiont fosmid library. The symbiont fliC gene has a high degree of homology with other bacterial flagellin genes in the amino- and carboxy-terminal regions, while the central region was found to be nonconserved. A sequence that was homologous to that of a consensus sigma28 RNA polymerase recognition site lay upstream of the proposed translational start site. The symbiont protein was expressed in Escherichia coli, and flagella were observed by electron microscopy. A 30,000-Mr protein subunit was identified in whole-cell extracts by Western blot analysis. These results provide the first direct evidence of a motile free-living stage of a chemoautotrophic symbiont and support the hypothesis that the symbiont of R. pachyptila is acquired with each new host generation.  (+info)

Structural and functional analyses of photosynthetic regulatory genes regA and regB from Rhodovulum sulfidophilum, Roseobacter denitrificans, and Rhodobacter capsulatus. (8/1292)

Genes coding for putative RegA, RegB, and SenC homologues were identified and characterized in the purple nonsulfur photosynthetic bacteria Rhodovulum sulfidophilum and Roseobacter denitrificans, species that demonstrate weak or no oxygen repression of photosystem synthesis. This additional sequence information was then used to perform a comparative analysis with previously sequenced RegA, RegB, and SenC homologues obtained from Rhodobacter capsulatus and Rhodobacter sphaeroides. These are photosynthetic bacteria that exhibit a high level of oxygen repression of photosystem synthesis controlled by the RegA-RegB two-component regulatory system. The response regulator, RegA, exhibits a remarkable 78.7 to 84.2% overall sequence identity, with total conservation within a putative helix-turn-helix DNA-binding motif. The RegB sensor kinase homologues also exhibit a high level of sequence conservation (55.9 to 61.5%) although these additional species give significantly different responses to oxygen. A Rhodovulum sulfidophilum mutant lacking regA or regB was constructed. These mutants produced smaller amounts of photopigments under aerobic and anaerobic conditions, indicating that the RegA-RegB regulon controls photosynthetic gene expression in this bacterium as it does as in Rhodobacter species. Rhodobacter capsulatus regA- or regB-deficient mutants recovered the synthesis of a photosynthetic apparatus that still retained regulation by oxygen tension when complemented with reg genes from Rhodovulum sulfidophilum and Roseobacter denitrificans. These results suggest that differential expression of photosynthetic genes in response to aerobic and anaerobic growth conditions is not the result of altered redox sensing by the sensor kinase protein, RegB.  (+info)

*Autoinducer

This phenomenon was termed "autoinduction" because it involved a molecule (autoinducer) that accumulated in a growth medium and ... As the density of quorum sensing bacterial cells increases so does the concentration of the autoinducer. Detection of signal ... Sporulation, on the other hand, is a physiological response of B. subtilis to depletion of nutrients within a particular ... Quorum sensing is a phenomenon that allows both Gram-negative and Gram-positive bacteria to sense one another and to regulate a ...

*Phage ecology

Bacterial resistance to phage puts pressure on the phage to develop stronger effects on the bacteria. The Red Queen hypothesis ... In the mid 1910s, when phage were first discovered, the concept of phage was very much a whole-culture phenomenon (like much of ... and physiological ecology under the heading of phage "organismal" ecology. However, as noted, these subdisciplines are not as ... As a rule of thumb, many phage biologists expect that phage population densities will exceed bacterial densities by a ratio of ...

*Nucleotide pyrophosphatase/phosphodiesterase

Though this phenomenon is subtle, it is important for understanding the physiological roles of AP superfamily enzymes, and also ... Bacterial NPP is thought to localize to the periplasm. The catalytic site of NPP consists of a two-metal-ion (bimetallo) Zn2+ ... Goding, James W.; Grobben, Bert; Slegers, Herman (2003). "Physiological and pathophysiological functions of the ecto-nucleotide ...

*Max Planck Institute of Molecular Physiology

... researchers identify and develop new tools for the investigation of biologically relevant processes and phenomena. Structural ... Official site Federation European Physiological Societies Official site European Federation for Pharmaceutical Sciences ... attention is given to the investigation into the molecular mechanisms of muscle contraction and the infection with bacterial ...

*Multidrug tolerance

Jayaraman R (2008). "Bacterial persistence: some new insights into an old phenomenon" (PDF). J Biosci. 33 (5): 795-805. doi: ... Persister cells have entered a non- or extremely slow-growing physiological state which makes them insensitive (refractory or ... Bacterial multidrug or antibiotic tolerance poses medically important challenges. It is largely responsible for the inability ... Multidrug tolerance can be caused by a reversible physiological state in a small subpopulation of genetically identical cells, ...

*Chronobiology

Alexander Chizhevsky Bacterial circadian rhythms Biological clock (aging) Circannual cycle Circaseptan, 7-day biological cycle ... Chronobiology is a field of biology that examines periodic (cyclic) phenomena in living organisms and their adaptation to solar ... ISBN 978-0-471-56802-5. "Effects of circadian rhythm phase alteration on physiological and psychological variables: ... They have even been found in bacteria, especially among the cyanobacteria (aka blue-green algae, see bacterial circadian ...

*E. coli long-term evolution experiment

Lenski chose an E. coli strain that reproduces only asexually, lacks any plasmids that could permit bacterial conjugation, and ... nor did the physiological characteristics in transport assays of Hall's Cit+ mutants match those to be expected for aerobic ... evolution has presented new phenomena to study, and as technology and methodological techniques have advanced. The use of E. ... and physiological levels. The bacteria can also be frozen and preserved while remaining viable. This has permitted the creation ...

*ESA Scientific Research on the International Space Station

ESA Molecular and physiological analysis of bacterial samples isolated from manned spacecraft (SAMPLE) - ESA SAMPLE - ESA Study ... Observation of environmental phenomena (IMEDIAS) A demonstration of physical phenomena in space. (VIDEO) Amateur Radio on ISS ( ... Molecular and physiological analysis of bacterial samples isolated from manned spacecraft (SAMPLE) SAMPLE Study of the ... ESA Physiological parameters that predict orthostatic intolerance after spaceflight (AORTA) - ESA Physiological parameters that ...

*Immune tolerance

The phenomenon of immune tolerance was first described by Ray D. Owens in 1945, who noted that dizygotic twin cattle sharing a ... Oral tolerance may depend on the same mechanisms of peripheral tolerance that limit inflammation to bacterial antigens in the ... Reactions are mounted, however, to pathogenic microbes and microbes that breach physiological barriers. Peripheral mucosal ... It is used to describe the phenomenon underlying discrimination of self from non-self, suppressing allergic responses, allowing ...

*Alkaline phosphatase

Bacterial alkaline phosphatase (BAP) is the most active of the enzymes, but also the most difficult to destroy at the end of ... As its name indicates, ALP functions best under alkaline pH environments and has the physiological role of dephosphorylating ... Horiuchi T, Horiuchi S, Mizuno D (May 1959). "A possible negative feedback phenomenon controlling formation of alkaline ... Some complexities of bacterial regulation and metabolism suggest that other, more subtle, purposes for the enzyme may also play ...

*Osteophagy

This parallels the phenomenon of osteophagy in birds, in which snail shells are ingested by egg-laying females to supplement ... Over the next several years, he was able to show that a bacterial strain living in the decomposing carcasses, Clostridium ... Therefore, it would be expected that the increased physiological needs of juvenile and gravid female tortoises would also ... This lack of protein during winter conditions can be attributed to the scarcity of animal proteins, a phenomenon that occurs in ...

*Palinopsia

... is a pathological symptom and should be distinguished from physiological afterimages, a common and benign phenomenon ... Arnold, RW; Janis, B; Wellman, S; Crouch, E; Rosen, C (Jan-Mar 1999). "Palinopsia with bacterial brain abscess and Noonan ... Physiological afterimages appear when viewing a bright stimulus and shifting visual focus. For example, after staring at a ... Physiological afterimages are usually the complementary color of the original stimulus (negative afterimage), while palinoptic ...

*Geobacter

Another observed metabolic phenomenon is the cooperation between Geobacter species, in which several species cooperate in ... Detailed functional genomic/physiological studies on one species, G. sulfurreducens was conducted. Genome-based models of ... Geobacter species are anaerobic respiration bacterial species which have capabilities that make them useful in bioremediation. ... several Geobacter species that are able to predict physiological responses under different environmental conditions are ...

*List of MeSH codes

... cell phenomena, and immunity G05 - genetic processes G06 - biochemical phenomena, metabolism, and nutrition G07 - physiological ... bacterial infections and mycoses C02 - virus diseases C03 - parasitic diseases C04 - neoplasms C05 - musculoskeletal diseases ... chemical and pharmacologic phenomena G13 - genetic phenomena G14 - genetic structures H - Physical Sciences H01 - natural ... psychological phenomena and processes F03 - mental disorders F04 - behavioral disciplines and activities G - Biological ...

*Complementation (genetics)

The phenomenon has long been known in animals and plants. Heterosis appears to be largely due to genetic complementation, that ... In this case the test depends on mixed infections of host bacterial cells with two different bacteriophage mutant types. Its ... "Physiological studies of conditional lethal mutants of bacteriophage T4D". Cold Spring Harbor Symp. Quant. Biol. 28: 375-394. ...

*Prokaryote

The transfer of bacterial DNA is under the control of the bacteriophage's genes rather than bacterial genes. Conjugation in the ... For a bacterium to bind, take up and recombine donor DNA into its own chromosome, it must first enter a special physiological ... a phenomenon known as quorum sensing. Biofilms may be highly heterogeneous and structurally complex and may attach to solid ... Other aspects of bacterial cooperation-such as bacterial conjugation and quorum-sensing-mediated pathogenicity, present ...

*Plant perception (physiology)

As described above in the case of a plant, similar mechanisms exist in a bacterial cell, a choanoflagellate, a fungal hypha, or ... Fromm, J; Lautner, S (2007). "Electrical signals and their physiological significance in plants". Plant Cell Environ. 30 (3): ... Many plants exhibit certain phenomena at specific times of the day; for example, certain flowers open only in the mornings. ... cellular and physiological levels to understand plant development and behaviour. The neurobiological view sees plants as ...

*SLC25A31

Kerr JF, Wyllie AH, Currie AR (Aug 1972). "Apoptosis: a basic biological phenomenon with wide-ranging implications in tissue ... Apoptosis occurs in many physiological and pathological processes. It plays an important role during embryonal development as ... bacterial expression, functional characterization and tissue distribution". FEBS Letters. 579 (3): 633-7. doi:10.1016/j.febslet ...

*Leukocyte extravasation

2002). "Bacterial adhesion to target cells enhanced by shear force". Cell. 109 (7): 913-923. doi:10.1016/S0092-8674(02)00796-1 ... This paradoxical phenomenon has not been satisfactorily explained despite the widespread interest. One initially dismissed ... This topic was finally able to be studied thoroughly under physiological shear stress conditions using a typical flow chamber. ... Thomas, W.E.; E. Trintchina; M. Forero; V. Vogel; E. V. Sokurenko (2002). "Bacterial adhesion to target cells enhanced by shear ...

*Chemotaxis

doi:10.2478/s11536-012-0130-9. Alberts B, Johnson A, Lewis J, Walter P, Raff MC (2002). "Bacterial Chemotaxis Depends on a Two- ... Köhidai L (1999). "Chemotaxis: the proper physiological response to evaluate phylogeny of signal molecules". Acta Biologica ... it is possible to describe the basic phenomenon of chemotaxis-driven motion in a straightforward way. Indeed, let us denote ... The presence of structural pore scale heterogeneities has an extra impact on the emerging bacterial patterns. A wide range of ...

*Toxic heavy metal

The origin of these symptoms was not clear; possibilities raised at the time included "a regional or bacterial disease or lead ... Cadmium exposure is a phenomenon of the early 20th century, and onwards. In Japan in 1910, the Mitsui Mining and Smelting ... Blake J (1884). "On the Connection Between Physiological Action and Chemical Constitution". The Journal of Physiology. 5 (1): ...

*Cell signaling

Blango, Matthew G; Mulvey, Matthew A (31 March 2009). "Bacterial landlines: contact-dependent signaling in bacterial ... The activated receptor must first interact with other proteins inside the cell before the ultimate physiological effect of the ... Therapeutic strategies to disrupt this phenomenon are being investigated. Interactions mediated through signaling molecules are ... Different bacterial species can coordinate to colonize a host and participate in common quorum sensing. ...

*Killer yeast

The phenomenon was first observed by Louis Pasteur, as noted in 1877. These yeast cells are immune to the toxic effects of the ... 1963). "The physiological basis of the killer character in yeast". Proc. XIth Int. Congr. Genet. 1:202-203. Goto, K.; Iwatuki, ... 1989) to use toxins to differentiate between 58 bacterial cultures. Vaughan-Martini, Cardinali and Martini (1996) used 24 ... "Biotyping of bacterial isolates using the yeast killer system". European Journal of Epidemiology. 5 (3): 303-10. doi:10.1007/ ...

*Jacques Monod

Sociologist Howard L. Kaye has suggested that Monod failed in his attempt to banish "mind and purpose from the phenomenon of ... He theorized on the growth of bacterial cultures and promoted the chemostat theory as a powerful continuous culture system to ... to Boris Ephrussi he owes the discovery of physiological genetics, and to Louis Rapkine the concept that only chemical and ... investigate bacterial physiology. The experimental system ultimately used by Jacob and Monod was a common bacterium, E. coli, ...

*Robert Koch

Koch observed the phenomenon of acquired immunity. On December 26, 1900, he arrived as part of an expedition to German New ... However, he soon realized that gelatin, like potato slices, was not the optimal medium for bacterial growth, as it did not ... In his sixth semester, Koch began to conduct research at the Physiological Institute, where he studied the secretion of ... To determine this causative agent, he dry-fixed bacterial cultures onto glass slides, used dyes to stain the cultures, and ...

*Cycadales

Sometimes bacterial preparations may be used to control insect infestation on cycads. When some of the mature plants prepare ... physiological and phytochemical data. The number of species in the clade is low compared to the number in most other plant ... perplexing phenomenon'". Proceedings of the National Academy of Sciences. 97 (24): 12939-12941. doi:10.1073/pnas.97.24.12939. ...
Drugs that stop bacteria from talking might be new, powerful antibiotics - a much needed weapon in our never-ending struggle against bacterial infections. On the other hand, drugs that make bacteria chat more could boost the production of biofuels and other industrial goods that bacteria make for us. In 1990 a young Bonnie Bassler, mesmerized by glow-in-the-dark bacteria that could talk to their peers to coordinate light production, wondered whether other bacteria could talk too. The answer, she soon found out, was yes - including all the nasty bacteria that cause disease. Today, Bonnie Bassler is a professor in molecular biology at Princeton University and an authority in the field of bacterial communication. Her findings, that all bacteria can talk, revolutionized the way we think of bacteria and opened the doors to important medical and industrial applications. But the discovery of bacterial communication has given us much more than new drugs. It has shown us how bacteria live in the real
Quorum sensing is a cell density-dependent signaling phenomenon used by bacteria for coordination of population-wide phenotypes, such as expression of virulence genes, antibiotic resistance and biofilm formation. Lately, disruption of bacterial communication has emerged as an anti-virulence strategy with enormous therapeutic potential given the increasing incidences of drug resistance in pathogenic bacteria. The quorum quenching therapeutic approach promises a lower risk of resistance development, since interference with virulence generally does not affect the growth and fitness of the bacteria and, hence, does not exert an associated selection pressure for drug-resistant strains. With better understanding of bacterial communication networks and mechanisms, many quorum quenching methods have been developed against various clinically significant bacterial pathogens. In particular, Gram-negative bacteria are an important group of pathogens, because, collectively, they are responsible for the majority of
...LA JOLLA CALIFORNIA OCT. 30 2007 -- In hopes of combating the growi...The work was published in the October 29 issue of the journal Chemistr...Staph and other infections are becoming increasingly deadly because ma...The bacterial infection process is dependent on a sort of chemical con...,Scripps,research,team,blocks,bacterial,communication,system,to,prevent,deadly,staph,infections,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
Bacteria have ways of communicating with each other, and scientists have now identified a new signaling system that, when there is a critical mass of bacteria present, causes the bacteria to produce an appendage known as a flagellum that moves like a corkscrew and gives them the ability to swim away, inhibiting the formation of biofilm. "Anything we can discover about this bacterial communication could be really important in understanding how bacteria become pathogenic in humans or how they form film on teeth or internal medical devices," said study co-author Dr. Russell Hill, Director of the Institute of Marine and Environmental Technology in Baltimore, Maryland. "Understanding that process may help in the future for controlling biofilms.". It is estimated that pound by pound there are more bacteria on the Earth than all other life forms combined. They are simple organisms that consist of one cell and can only be seen through a microscope. However, bacteria have evolved ways to gather into ...
In 1975 our laboratory reported that a methylated membrane protein is involved in bacterial chemotaxis (Kort et al., 1975). It is now known that the extent of methylation of this protein (called MCP...
Viruses are being redefined as more than just pathogens. They are also critical symbiotic partners in the health of their hosts. In some cases, viruses have fused with their hosts in symbiogenetic relationships. Mutualistic interactions are found in plant, insect, and mammalian viruses, as well as with eukaryotic and prokaryotic microbes, and some interactions involve…
In a recent study a new role of cAMP was described (A synthetic Escherichia coli communication system mediated by extracellular cyclic AMP (publication in progress). This system is involved in bacterial communication. We used this module to allow communications within our bacteria ...
Bacterial Biofilms von Tony Romeo und Buchbewertungen gibt es auf ReadRate.com. Bücher können hier direkt online erworben werden.
This year-long proof of concept explores the interplay between bacterial communication circuits and the surface topology of the substrate they are on, to see if certain designed surface features can be made to trigger genetic development switches. Differentiation due to a diffusible chemical signal is central in the development of multicellular organisms. Success in replicating this strategy on a synthetic structure enables a spatially programmable consortium of bacterial cells. Our aims were to enable the self-assembly of multicellular microbial films on the surface of synthetic silicon and polymer forms to form hybrid constructs, generation of construct polarity in gene expression driven by the topology of the synthetic form, and size control of the assembled multicellular film. These achievements would enable our long term vision, which is to create a micro scale, programmable cellular-synthetic hybrid robot capable of autonomous motility, sensing and response in aqueous environments. These ...
keywords = {Bacterial Physiological Phenomena, Cell Surface, Flagella, Flagellin, Humans, Membrane Glycoproteins, Receptors, Toll-Like Receptor 5, Toll-Like Receptors ...
Stoodley P, Wilson S, Cargo R, Piscitteli C, Rupp CJ, "Detachment and other dynamic processes in bacterial biofilms," in Surfaces in Biomaterials 2001 Symposium Proceedings, pp. 189-192, Surfaces in Biomaterials Foundation, Minneapolis ...
Hyphomonas neptunium ATCC ® 15444D-5™ Designation: Genomic DNA from Hyphomonas neptunium strain 14-15 TypeStrain=True Application:
Tumbling and swimming motility of a flagellated rod are illustrated using 3D animation, one of many videos available for the classroom or broadcast.
De Mot, R., and Vanderleyden, J. (1994) The C-terminal sequence conservation between OmpA-related outer membrane proteins and MotB suggests a common function in both gram-positive and gram-negative bacteria, possibly in the interaction of these domains with peptidoglycan. Mol Microbiol 12: 333-334 ...
... - Ask a question about ReNu MultiPlus Rewetting Drops, start a discussion about ReNu MultiPlus Rewetting Drops, share y
Analysis of Pseudomonas aeruginosa cells treated for up to 20 hours with 3,4-(di)hydroxy-heptyl-quinoline (PQS), a bacterial intercellular signaling molecule. Results provide insight into the role of PQS in the bacterial communication system termed quorum sensing. ...
Opti-Free PureMoist Rewetting Drops at Walgreens. Get free shipping at $35 and view promotions and reviews for Opti-Free PureMoist Rewetting Drops
A team of researchers with members from the U.S., Germany and Sweden has discovered that the cellulose found in bacterial biofilms differs from the cellulose in plants. In their paper published in the journal Science, the ...
The discovery reveals the role of a growth factor and endothelial cells in thymus repair, and could have implications for chemotherapy and radiation patients recovery following treatment.. 0 Comments. ...
A community-based life style is the normal mode of growth and survival for many bacterial species. These cellular accretions or biofilms are initiated upon reco
Gliding Cyanobacterial filaments A thin slime sheath, external to the oscillin layer, encloses the cell or filament. Cyanobacteria may be immotile, or they move
In this video the concept of "irreducible complexity" is discussed as a obstacle to the theory of natural selection. In irreducible complexity, a system requires the existence of its unique parts in order to function. A non-biological example of this is the common mousetrap. Each component of the mousetrap is required in order for it to operate appropriately. The biological example of irreducible complexity is the bacterial flagellum. Natural selection, cannot explain the existence of the bacterial flagellum where the concept of "irreducible complexity" challenges its theory ...
This weeks post at Design Disquisitions is the first in a series of articles entitled Critics Corner where I focus on a critic of ID. The main purpose of these posts is to document their work relevant to ID and also to document the direct responses to the particular critic in question, by those sympathetic to […]. ...
Harmful bacteria are often associated with the toxins they use on their hosts. It is generally believed that the greater the toxicity the more severe is the
CamStent Ltd is an emerging medical materials company based in Cambridge, UK. We are focused on building revenues through the...
Bacterial chemotaxis, a remarkable behavioral trait which allows bacteria to sense and respond to chemical gradients in the environment, has implications in a broad range of fields including but not limited to disease pathogenesis, in-situ bioremediation and marine biogeochemistry. And therefore, studying bacterial chemotaxis is of significant importance to scientists and engineers alike. Microfluidics has revolutionized the way we study the motile behavior of cells by enabling observations at high spatial and temporal resolution in carefully controlled microenvironments. This thesis aims to explore the potential of microfluidic technology in studying bacterial behavior by investigating different aspects of bacterial chemotaxis on a microfluidic platform. We quantified population-scale transport parameters of bacteria using videomicroscopy and cell tracking in controlled chemoattractant gradients. Previously, transport parameters have been derived theoretically from single-cell swimming behavior ...
immune Uncategorized Bosutinib, LDHAL6A antibody Bacterial biofilm has been shown to play a role in delaying wound healing of chronic wounds, a major medical problem that results in significant healthcare burden. gradually cleared from your wounds while the presence of (part of the normal mouse pores and skin flora) improved. Scabs from all unhealed wounds contained 107 study of bacterial biofilm reactions to sponsor defenses and the effects of biofilms on sponsor wound healing pathways. It may also be used to test anti-biofilm strategies the treatment of chronic wounds. spp., and [5C7] have been isolated from chronic wounds, even though the wound may not display any medical indications of localized illness. Multiple bacterial varieties, usually two to five varieties, reside concurrently on a single ulcer [7C9]. The chronicity of unhealed wounds is definitely associated with higher proportion of colonization by anaerobic bacteria and greater variety of aerobic varieties [5]. More recent studies ...
RICHARDSON, Texas (March 29, 2006) - A research associate and a professor at The University of Texas at Dallas (UTD) have been awarded a three-year, $240,000 grant to study how bacterial communication affects the formation of biofilms, the culprit in many human bacterial infections. The National Institutes of Health (NIH) has awarded the grant to Dr. Audry Almengor, research associate, and Dr. Juan E. González, associate professor, in the Department of Molecular and Cell Biology. The grant supports Almengors postdoctoral work at UTD.. "This is a very important area of study, since most of the bacteria that interact with animals or plants attach to surfaces, where they form biofilms," González said. Biofilms are a collection of microorganisms that attach themselves to either an inert or living surface, and they exist wherever surfaces contact water. In addition to being implicated in a "significant number" of human bacterial infections, biofilms can also cause product contamination and even ...
Some bacteria boast a marvelous swimming device, the flagellum, which has no counterpart in more complex cells. In 1973 it was discovered that some bacteria swim by rotating their flagella. So the bacterial flagellum acts as a rotary propellor -- in contrast to the cilium, which acts more like an oar.. The structure of a flagellum is quite different from that of a cilium. The flagellum is a long, hairlike filament embedded in the cell membrane. The external filament consists of a single type of protein, called flagellin. The flagellin filament is the paddle surface that contacts the the liquid during swimming. At the end of the flagellin filament near the surface of the cell, there is a bulge in the thickness of the flagellum. It is here that the filament attaches to the rotor drive. The attachment material is comprised of something called hook protein. The filament of a bacterial flagellum, unlike a cilium, contains no motor protein; if it is broken off, the filament just floats stiffly in ...
Building natures extraordinary machines - new insights, new technologies Lawrence Lee and his team are building natures extraordinary molecular machines such as the bacterial flagellar motor − a rotary engine that can rotate five times faster than an F1 engine. They hope to uncover one of Natures best-kept secrets − how so many brainless molecules self-assemble into sophisticated nanoscopic machines. These machines often surpass man-made technologies with their function, efficiency, scale and robustness.
The flow cell biofilm system is an important and widely used tool for the in vitro cultivation and evaluation of bacterial biofilms under hydrodynamic conditions of flow. This paper provides an introduction to the background and use of such systems, accompanied by a detailed guide to the assembly of the apparatus including the description of new modifications which enhance its performance. As such, this is an essential guide for the novice biofilm researcher as well as providing valuable trouble-shooting techniques for even the most experienced laboratories. The adoption of a common and reliable methodology amongst researchers would enable findings to be shared and replicated amongst the biofilm research community, with the overall aim of advancing understanding and management of these complex and widespread bacterial communities.. ...
2019 Regents of the University of Minnesota. All rights reserved. The University of Minnesota is an equal opportunity educator and employer. Privacy Statement ...
Daily News How Gaining and Losing Weight Affects the Body Millions of measurements from 23 people who consumed extra calories every day for a month reveal changes in proteins, metabolites, and gut microbiota that accompany shifts in body mass.. ...
Turnover of Endogenous SsrA-tagged Proteins Mediated by ATP-dependent Proteases in Escherichia coli*[S with combining enclosing square]: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2516991 ...
Get more mileage out of your lenses.OPTI-FREE EXPRESS Rewetting Drops moistens your lenses and helps to remove particulate material that may cause irritation...
Roberts, M.A.J. and August, E. and Hamadeh, A. and Maini, P. K. and McSharry, P. E. and Armitage, J. P. and Papachristodoulou, A. (2009) A model invalidation-based approach for elucidating biological signalling pathways, applied to the chemotaxis pathway inR. sphaeroides. BMC Systems Biology, 3 (3). pp. 1-14. ...
Motility is achieved in most bacterial species by the flagellar apparatus. It consists of dozens of different proteins with thousands of individual subunits. The published literature about bacterial chemotaxis and flagella ...
Little, Ainslie E. F., Murakami, Takahiro, Mueller, Ulrich Gerhard, and Currie, Cameron Robert. 2006. ",a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F8594",Defending Against Parasites: Fungus-Growing Ants Combine Specialized Behaviours and Microbial Symbionts to Protect Their Fungus Gardens,/a,." ,em,Biology Letters,/em,. 12–16. ,a href="https://doi.org/10.1098/rsbl.2005.0371",https://doi.org/10.1098/rsbl.2005.0371,/a ...
Fahrner, K.A. and Berg, H.C. Mutations that stimulate flhDC expression in Escherichia coli K-12. J. Bacteriol. 197 No.19, 3087-3096 (2015).. Yuan, J., Fahrner, K.A., Turner, L., and Berg, H.C. Asymmetry in the clockwise and counter-clockwise rotation of the bacterial flagellar motor. Proc. Natl. Acad. Sci. USA 107, 12846-12849 (2010).. Yuan, J., Fahrner, K. A. & Berg, H. C. Switching of the bacterial flagellar motor near zero load. J. Mol. Biol. 390, 394-400 (2009). Bates, D., Epstein, J., Boyle, E., Fahrner, K., Berg, H. and Kleckner, N. The Escherichia coli baby cell column: a novel cell synchronization method provides new insight into the bacterial cell cycle. Molec. Microbiol. 57, 380-391 (2005). Fahrner, K.A., Ryu, W.S. and Berg, H.C. Bacterial flagellar switching under load. Nature 423, 938 (2003). Scharf, B.E., Fahrner, K.A. and Berg, H.C. CheZ has no effect on flagellar motors activated by CheY13DK106YW. J. Bacteriol. 180, 5123-5128 (1998). Fahrner, K.A., Block, S.M., Krishnaswamy, S., ...
We show in this report that E. coli remodels its chemosensory physiology as a response to swarming. The altered physiology is likely the result of an elevation of the concentration of CheZ, which increases CheY∼P dephosphorylation bias and reduces the cells tumble bias. Reducing the tumble bias improves swarming performance, but a very low tumble bias negatively impacts expansion of the swarm, corroborating previous reports that tumbling is still necessary in the swarm (49). Therefore, there is an optimal tumble bias for swarming and E. coli is able to adapt its motility behavior to surface conditions that favor swarming.. The increased stability of CheZ in swarmer cells explains the increase in their CheZ levels (Fig. 6). However, the mechanism by which CheZ is specifically stabilized during swarming will require further investigation. In B. subtilis, contact with swarm agar increases synthesis of flagella by somehow sequestering a specific adaptor protein that otherwise (in liquid), in ...
Opti-Free Express Contact Lenses Rewetting Drops at Walgreens. Get free shipping at $35 and view promotions and reviews for Opti-Free Express Contact Lenses Rewetting Drops
Shop for Opti-Free Express Sterile Rewetting Drops For Contact Lenses, Economy Size - 0.66 Oz from Contact Lens Rewetting Drops. Browse other items form Opti-Free
rationalskepticism.org seeks to promote open and reasonable discussion to support free thinking and free people. The path to free thought is through questioning, learning from, and understanding ourselves, others, and our universe.
Note the contrasts to ID... Plate Tectonics explained things that were open questions in prior theories. It explained new data that was unknown when the older theories were propounded. It unified a great deal of disparate data in a coherent whole. *And* a few people kept the idea alive even though the proposal was out of favor generally. IDers on the other hand, just whine that they cant get a hearing.. ...
Scientists previously thought bacteria needed a host to travel the globe. However, new research suggests bacteria can travel thousands of miles through the air.
Biolfim formation is a complex and dinamic process, where bacteria collonies grow around a viscous material attached on a electrode surface.
Browse BioCare®s range of live bacteria supplements, including high potency acidophilus tablets, capsules & powder. Suitable for children and adults.
Thursday featured turkeys and thunderstorms. There have been several turkeys in the vicinity gobbling for mates. One gobbled several times when I went out to feed the outdoor furnace.
Princeton University. Biographical Sketch Not long ago, most biologists thought bacteria were asocial creatures. Now, it is clear that bacteria communicate within and between species using chemical languages that enable them to coordinately regulate gene expression and synchronize group behaviors. Bacterial communication, called quorum sensing, is a census-taking process that allows bacteria to wait until they have achieved a critical cell number before embarking on processes such as virulence, biofilm formation, sporulation and mating. Quorum sensing processes are typically ones that are not effective if undertaken by a single bacterium acting alone but become successful when a group of cells acts in concert.. Bonnie Bassler has been studying quorum sensing for nearly 20 years. She and her coworkers have shown that bacteria are multi-lingual: They have unique languages for communicating within their own species, and they also possess a common language for communication between species. Bassler ...
Lobob Optimum Rewetting Drops are formulated for lubricating and rewetting the eyes without having to remove your contact lenses. |br/>|br/> Lobob Optimum Rewetting Drops ensure long and comfortable lens wear, and are recommended by Eye-Care professionals around the world.
The bacterial flagellum. (A) Electron micrograph of a Salmonella cell. (B) Electron micrograph of the Salmonella flagellum. (C) Schematic diagram of the flagellum. The flagellum consists of at least three part: the basal body as a bi-directional rotary motor, the hook as a universal joint and the filament as a helical screw.
Regulation of the direction of flagellar rotation is central to the mechanism of bacterial chemotaxis. The transitions between counterclockwise and clockwise rotation are controlled by a switch complex composed of three proteins (FliG, FliM, and FliN) and located at the base of the flagellar motor. The mechanism of function of the switch is unknown. Here we demonstrate that the diffusible clockwise-signal molecule, the CheY protein, binds to the switch, that the primary docking site is FliM, that the extent of CheY binding to FliM is dependent upon the phosphorylation level of CheY, and that it is unaffected by the other two switch proteins. This study provides a biochemical demonstration of binding of a signal molecule to the bacterial switch and demonstrates directly that phosphorylation regulates the activity of this molecule ...
I am professor in electron cryotomography and bacterial chemotaxis. I am interested in understanding how microbes sense and respond to their environment. In order to gain insight into the structure and function of the molecular complexes involved in these behaviors, my lab uses electron cryotomography (ECT). This technique allows us to directly study microbes in their native state at resolutions capable of visualizing individual proteins.
Live Bacteria Supplements for Aquariums at the lowest prices online - up to 60% off everyday - at That Fish Place. Click or call 1-888-842-8738 for more.
Live Bacteria Supplements for Aquariums at the lowest prices online - up to 60% off everyday - at That Fish Place. Click or call 1-888-842-8738 for more.
Bacteria are exposed to constantly changing environments. An efficient way to navigate towards favourable conditions is flagella-mediated motility. Flagellar rotation is achieved by the bacterial flagellar motor, composed of the rotor and stator complexes which surround the rotor in a ring-like stru.... Ausführliche Beschreibung. ...
An apparatus for automatically transferring a desired one of bacterial colonies grown in a medium in a culture Petri dish onto a medium in a test Petri dish or a test tube by using a bacterial colony pick-up/transfer element of the disposable type or a bacterial colony pick-up/transfer element of the reuse type and by using various mechanisms controlled by a computer.
OBJECTIVE: The present study aimed to investigate the effects of the bacterial biofilm formation on the tonsil surface exposed N-acetyl-cysteine (NAC) and
Methods for treating patients in which damaged tissue or an indwelling prosthetic device or catheter has a bacterial biofilm growing thereon, to at least partially disrupt said biofilm, by administering at least one antibacterial enzyme that is lethal or damaging to the biofilm-forming bacteria in an amount that is effective to at least partially disrupt the biofilm upon contact therewith. Methods for prophylactically treating a patient, and methods for disinfecting or sterilizing a surface ex-vivo to remove a biofilm or prevent biofilm growth are also disclosed, as well as implantable articles susceptible to biofilm growth to which a prophylactic coating of an antibacterial enzyme has been applied.
Is it possible to know the live bacteria using PCR for a certain genus? - posted in General Biology Discussion: - I am doing starvation experiment for nitrifying bacteria and I want to show only the live bacteria for nitrobacter and nitrosospira for example. But the normal PCR will amplify the live and the dead bacteria DNA. Any suggestions?
View Notes - 12-ch16-microbes from BIO 2 at University of Texas. Chapter 16 continued: Chapter 16 continued: Microbes Microbes Early microbiologists
For a long time microbial ecology has been developed as a distinct field with- in Ecology. In spite of the important role of microorganisms in the environ- ment, this group of invisible organisms re
Every home has bacteria, and many types of bacteria can even be good for you and your family. However, some bacteria can be hazardous to your health.
Refresh your eyes quickly and easily anytime. Moisturizes for greater comfort. Works while you wear your lenses. Long lasting comfort. For soft (hydrophilic)...
Bacteria may travel thousands of miles through the air worldwide instead of hitching rides with people and animals, according to Rutgers and other scientists. Their air bridge hypothesis could shed light on how harmful ...
... Introduction Most common bacteria are either Gram-positive or Gram-negative (based on cell wallstructure). Remember from lecture, Gram-positive ce
Honey contains several unique antibacterial components. These components are believed to act on diverse bacterial targets, are broad spectrum, operate synergistically, prevent biofilm formation, and decrease production of virulence factors. Moreover, honey has the ability to block bacterial communication (quorum sensing), and therefore, it is unlikely that bacteria develop resistance against honey. Bacterial resistance against honey has not been documented so far. Unlike conventional antibiotics, honey only targets pathogenic bacteria without disturbing the growth of normal gastrointestinal flora when taken orally. It also contains prebiotics, probiotics, and zinc and enhances the growth of beneficial gut flora. The presence of such plethora of antibacterial properties in one product makes it a promising candidate not only in wound infections but also in systemic and particularly for gastrointestinal infections. Agar diffusion assay, being used for evaluating antibacterial activity of honey, is ...
Quorum sensing is a process of bacterial cell-to-cell communication involving the production and detection of extracellular signaling molecules called autoinducers. Recently, it has been proposed that autoinducer-2 (AI-2), a furanosyl borate diester derived from the recycling of S-adenosyl-homocysteine (SAH) to homocysteine, serves as a universal signal for interspecies communication. In this study, 138 completed genomes were examined for the genes involved in the synthesis and detection of AI-2. Except for some symbionts and parasites, all organisms have a pathway to recycle SAH, either using a two-step enzymatic conversion by the Pfs and LuxS enzymes or a one-step conversion using SAH-hydrolase (SahH). 51 organisms including most Gamma-, Beta-, and Epsilonproteobacteria, and Firmicutes possess the Pfs-LuxS pathway, while Archaea, Eukarya, Alphaproteobacteria, Actinobacteria and Cyanobacteria prefer the SahH pathway. In all 138 organisms, only the three Vibrio strains had strong, bidirectional matches
AM: The presumption that we cannot communicate across species comes from the worldview that says there is this human world and then there is this animal world or the environment outside of us. All kinds of cultures throughout time have included myths and stories about people communicating across boundaries of species. It doesnt have to be like some woo-woo New Age thing. It is just part of being a living creature on this planet that species are interacting with each other across species boundaries in all kinds of ways.. It doesnt mean we are reading each others thoughts or completely understand what is going on in each others minds. The birds outside my window are not making noise because there is a huge construction truck making a whole lot of noise instead. That is interspecies communication or interruption of interspecies communication. We are all in this thing together. I am really interested in the scientists that are taking that to another level and saying beyond metaphor what is ...
Gene regulatory networks are one of the main cellular infrastructures that confer defined biological functions. Our research focuses on synthetic and systems biology - the analysis, construction, and exploitation of these regulatory networks for cellular functionality programming. This is an interdisciplinary research area that spans the boundary between biology, engineering, and physics. Specifically, we are interested in understanding the architecture and dynamics of naturally existing networks, primarily those in bacteria, and exploring their relationship to cellular function. One interesting example is bacterial communication networks and their roles in enabling cellular collective behaviors. In parallel, we are interested in engineering gene circuits for biomedical applications by assembling and editing genes and genomes inside living cells, very much like building integrated circuits with transistors and other elements for a computer. Along that line, microbiota reengineering is very ...
John McAfee, retired founder of McAfee Antivirus, has had his Belize laboratory raided and his dog shot during a dawn raid by thirty officers of the local police Gang Suppression Unit.. At 6am on Monday morning the officers with a warrant stormed McAfees laboratory, which researches ways to use bacterial communication to fight disease. In a statement to local station Channel Five, McAfee said police smashed open unlocked doors, handcuffed the 12 employees and "murdered my dog in cold blood.". "This is clearly a military dictatorship where people are allowed to go and harass citizens based on rumor alone and treat them as if they are guilty before any evidence whatsoever is obtained," he said. "It is astonishing, it is beyond belief and I intend not to let this stand. I will not stand idly by to let this happen to me.". The police claimed that the facility had unlicensed firearms, and McAfee claims the correct documents were all handed over, but after the raid a single firearms certificate was ...
A free platform for explaining your research in plain language, and managing how you communicate around it - so you can understand how best to increase its impact.
Microoganisms are distributed across every ecosystem, and microbial transformations are fundamental to the operation of the biosphere. Microbial ecology is the study of this interaction between microorganisms and their environment, and arguably…
This is in response to your request submitted on behalf of Jonkman Equipment Ltd. for an advance ruling on the tariff classification of Chrisal Water Plus Probiotic-Bacterial Ferment of live bacteria.
These days we are constantly bombarded by commercial messages urging us to fight germs and rid ourselves of bacteria. But in the right places and amounts, bacteria are actually very valuable to our he...
Biofilms. Microbial Biochemistry. Definition of a Biofilm. Biofilms are communities of microorganisms in a matrix that joins them together and to living or inert substrates Slideshow 6741296 by ursa-underwood
Many microbes grow in surface-associated, multicellular communities known as biofilms. These biofilms are the most abundant mode of microbial life outside the ocean.

The flow chart of extraction, detection, purification a | Open-iThe flow chart of extraction, detection, purification a | Open-i

Bottom Line: There are many different kinds of signal molecules in the bacterial community.In this article, different methods, ... Bottom Line: There are many different kinds of signal molecules in the bacterial community.In this article, different methods, ... Extraction, purification and identification of bacterial signal molecules based on N-acyl homoserine lactones. ... Extraction, purification and identification of bacterial signal molecules based on N-acyl homoserine lactones. ...
more infohttps://openi.nlm.nih.gov/detailedresult.php?img=PMC3815260_mbt0004-0479-f1&req=4

Go to A hitchhikers guide to the nervous system: the complex journey of viruses and toxins.Go to A hitchhiker's guide to the nervous system: the complex journey of viruses and toxins.

Bacterial Physiological Phenomena; *Virus Physiological Phenomena; Axonal Transport; Bacterial Toxins/*metabolism; Blood-Brain ... Some viruses and bacterial toxins interact with membrane receptors that are present at nerve terminals to enter the axoplasm. ...
more infohttp://www.igmm.cnrs.fr/publication/a-hitchhikers-guide-to-the-nervous-system-the-complex-journey-of-viruses-and-toxins/

Biochemistry & Molecular Biology - Grants & Projects
     - Penn StateBiochemistry & Molecular Biology - Grants & Projects - Penn State

Bacterial Physiological Phenomena Francisella tularensis Anti-Bacterial Agents Ribozyme Guided CRISPRi in Human- and Rodent- ...
more infohttps://pennstate.pure.elsevier.com/en/organisations/biochemistry-molecular-biology/projects/?status=RUNNING

Milner Centre for Evolution - Research Output
     - the University of Baths research portalMilner Centre for Evolution - Research Output - the University of Bath's research portal

Population genomics of bacterial host adaptation. Sheppard, S. K., Guttman, D. S. & Fitzgerald, J. R., 4 Jul 2018, In : Nature ... Bacterial toxins: Offensive, defensive, or something else altogether?. Rudkin, J. K., McLoughlin, R. M., Preston, A. & Massey, ...
more infohttps://researchportal.bath.ac.uk/en/organisations/milner-centre-for-evolution/publications/?type=%2Fdk%2Fatira%2Fpure%2Fresearchoutput%2Fresearchoutputtypes%2Fcontributiontojournal%2Fsystematicreview

Graduate Nursing Project | Eccles Health Sciences Library | J. Willard Marriott Digital LibraryGraduate Nursing Project | Eccles Health Sciences Library | J. Willard Marriott Digital Library

Bacterial Physiological Phenomena; Anti-Infective Agents; Hydrogels. 40. Physical Activity in the Aging Adult. Physical ... A Guideline for the Assessment and Treatment of Bacterial Biofilms in Chronic Wounds. Bacterial biofilms are a contributing ... However, despite the seeming recognition of this phenomenon, there still exists no definitive means of assessing or d.... ...
more infohttps://collections.lib.utah.edu/search?page=2&q=date_t%3A%222013%22&fd=title_t%2Cdescription_t%2Ccreator_t%2Csubject_t&sort=facet_date_t+asc&facet_setname_s=ehsl_gradnu

Department of Biology & Biochemistry - Research Output
     - the University of Baths research portalDepartment of Biology & Biochemistry - Research Output - the University of Bath's research portal

Population genomics of bacterial host adaptation. Sheppard, S. K., Guttman, D. S. & Fitzgerald, J. R., 4 Jul 2018, In : Nature ... Bacterial bile acid modification and potential pharmaceutical applications. Jones, B. V., 20 Oct 2011, In : Journal of Applied ... Bacterial toxins: Offensive, defensive, or something else altogether?. Rudkin, J. K., McLoughlin, R. M., Preston, A. & Massey, ... Regulatory RNAs in Bacillus subtilis: a Gram-Positive Perspective on Bacterial RNA-Mediated Regulation of Gene Expression. Mars ...
more infohttps://researchportal.bath.ac.uk/en/organisations/department-of-biology-biochemistry/publications/?type=%2Fdk%2Fatira%2Fpure%2Fresearchoutput%2Fresearchoutputtypes%2Fcontributiontojournal%2Fsystematicreview

Graduate Nursing Project | Eccles Health Sciences Library | J. Willard Marriott Digital LibraryGraduate Nursing Project | Eccles Health Sciences Library | J. Willard Marriott Digital Library

Bacterial Physiological Phenomena; Anti-Infective Agents; Hydrogels. 40. Physical Activity in the Aging Adult. Physical ... A Guideline for the Assessment and Treatment of Bacterial Biofilms in Chronic Wounds. Bacterial biofilms are a contributing ... However, despite the seeming recognition of this phenomenon, there still exists no definitive means of assessing or d.... ...
more infohttps://collections.lib.utah.edu/search?page=2&facet_type_t=%22Text%22&facet_format_t=%22application%2Fpdf%22&q=date_t%3A%222013%22&fd=title_t%2Cdescription_t%2Ccreator_t%2Csubject_t&sort=facet_date_t+asc&facet_setname_s=ehsl_gradnu

Induction of Th17 cells by intestinal microbiota<...Induction of Th17 cells by intestinal microbiota<...

Bacterial Physiological Phenomena Serum Amyloid A Protein Th17 Cells Interleukin-17 Interleukins ...
more infohttps://keio.pure.elsevier.com/en/publications/induction-of-th17-cells-by-intestinal-microbiota

Dumpster Diving in the Gut: Bacterial Microcompartments as Part of a Host-Associated Lifestyle - PubMedDumpster Diving in the Gut: Bacterial Microcompartments as Part of a Host-Associated Lifestyle - PubMed

Bacterial Microcompartments as Part of a Host-Associated Lifestyle ... Bacterial Physiological Phenomena* Actions. * Search in PubMed * Search in MeSH * Add to Search ... Dumpster Diving in the Gut: Bacterial Microcompartments as Part of a Host-Associated Lifestyle Christopher M Jakobson 1 , ... Dumpster Diving in the Gut: Bacterial Microcompartments as Part of a Host-Associated Lifestyle Christopher M Jakobson et al. ...
more infohttps://phgkb.cdc.gov/PHGKB/phgHome.action?action=forward&dbsource=amd&id=8320

Sex in Microbial Pathogens - PubMedSex in Microbial Pathogens - PubMed

The sexual processes include bacterial transformation, eukaryotic meiotic sex an … ... Bacterial Physiological Phenomena Actions. * Search in PubMed * Search in MeSH * Add to Search ... The RecRO pathway of DNA recombinational repair in Helicobacter pylori and its role in bacterial survival in the host. Wang G, ... Keywords: Bacterial transformation; DNA damage; Inbreeding; Meiosis; Microbial pathogen; Multiplicity reactivation; ...
more infohttps://phgkb.cdc.gov/PHGKB/phgHome.action?action=forward&dbsource=amd&id=14831

Diverse taxis mechanisms.Time course of active effector | Open-iDiverse taxis mechanisms.Time course of active effector | Open-i

Adaptation, Physiological/physiology*. *Bacterial Physiological Phenomena*. *Bacterial Proteins/physiology*. *Biological ...
more infohttps://openi.nlm.nih.gov/detailedresult.php?img=PMC2386285_pcbi.1000084.g003&req=4

Quorum sensing and the confusion about diffusion. - Oxford NeuroscienceQuorum sensing and the confusion about diffusion. - Oxford Neuroscience

... have been suggested as competing explanations for why bacterial cells use the local concentration of small molecules to ... Bacterial Physiological Phenomena, Gene Expression Regulation, Bacterial, Quorum Sensing. © 2018 Level 6, West Wing, John ... have been suggested as competing explanations for why bacterial cells use the local concentration of small molecules to ...
more infohttps://www.neuroscience.ox.ac.uk/publications/356265

NAVER 학술정보 >...NAVER 학술정보 >...

Bacterial Physiological Phenomena, Plant Roots, microbiology, Polymerase Chain Reaction, Rhizosphere, Soil Microbiology ... Practical benefits of knowing the enemy: modern molecular tools for diagnosing the etiology of bacterial diseases and ... Crops, Agricultural, genetics, immunology, physiology, Gene Expression Regulation, Plant, Plant Immunity, Plant Physiological ...
more infohttps://academic.naver.com/search.naver?field=3&query=ANNUAL+REVIEW+OF+PHYTOPATHOLOGY+53%EA%B6%8C+1%ED%98%B8

NAVER 학술정보 >...NAVER 학술정보 >...

Bacterial Physiological Phenomena, Bacterial Proteins, metabolism, Chemotaxis, Flagella, Membrane Proteins, Signal Transduction ... Adaptation, Physiological, Bacterial Proteins, genetics, metabolism, Betaine, Carnitine, Cold Temperature, Listeria ... Bacterial Proteins, genetics, metabolism, Electrophoresis, Gel, Two-Dimensional, methods, Gene Expression Regulation, Bacterial ... How signals are heard during bacterial chemotaxis: protein-protein interactions in sensory signal propagation.. 2000 A Bren 외 1 ...
more infohttps://academic.naver.com/search.naver?field=3&query=Journal+of+Bacteriology+182%EA%B6%8C+24%ED%98%B8

PublicationsPublications

Résumé , Liens , BibTeX , Étiquettes: Animal, Bacterial Physiological Phenomena, Disease Models, Gastrointestinal Tract, Host- ... keywords = {Animal, Bacterial Physiological Phenomena, Disease Models, Gastrointestinal Tract, Host-Pathogen Interactions},. ... Amino Acid Anti-Bacterial Agents Antimicrobial Cationic Peptides Base Sequence Cell Surface Defensins Ecdysone Female Gene ... The NF-κB transcription factor Relish activates effector gene expression following Gram-negative bacterial immune challenge. ...
more infohttp://ibmc-ridi.cnrs.fr/fr/publications/

Medical e-BooksMedical e-Books

Bacteria, Virulence, Virulence Factors, Host-Pathogen Interactions, Bacterial Physiological Phenomena, Host-bacteria ... Regulation of bacterial virulence. Bacteria, Bacterial genetics, Bacterial toxins, Bacteriophages, Virulence (Microbiology), ... Allergy and Immunology, Bacterial Infections, Bacterial Infections and Mycoses, Bacteriology, Communicable Diseases, ... Bacterial virulence : basic principles, models and global approaches. ...
more infohttps://www.terkko.helsinki.fi/medical-microbiology/books/

Evidence for light perception in a bioluminescent organ.  - PubMed - NCBIEvidence for light perception in a bioluminescent organ. - PubMed - NCBI

Bacterial Physiological Phenomena. *Decapodiformes/physiology*. *Electroretinography. *Immunohistochemistry. *Light*. * ... Here we show that bioluminescent organs of the squid Euprymna scolopes possess the molecular, biochemical, and physiological ... with the potential to perceive directly the bioluminescence produced by their bacterial partners. ... experiments localized multiple proteins of visual transduction cascades to tissues housing light-producing bacterial symbionts ...
more infohttps://www.ncbi.nlm.nih.gov/pubmed/19509343

Feeding ecology and evidence for amino acid synthesis in the periodical cicada (Magicicada).  - PubMed - NCBIFeeding ecology and evidence for amino acid synthesis in the periodical cicada (Magicicada). - PubMed - NCBI

Bacterial Physiological Phenomena. *Feeding Behavior. *Female. *Hemiptera/microbiology. *Hemiptera/physiology*. *Male. * ...
more infohttps://www.ncbi.nlm.nih.gov/pubmed/21075111?dopt=Abstract

Sensory perception and transduction in aneural organisms (Book, 1985) [WorldCat.org]Sensory perception and transduction in aneural organisms (Book, 1985) [WorldCat.org]

... phenomena> # Bacterial Physiological Phenomena. a schema:Intangible ;. schema:name "Bacterial Physiological Phenomena"@en ;. . ... physiological_phenomena> ; # Bacterial Physiological Phenomena. schema:bookFormat bgn:PrintBook ;. schema:contributor Bacterial Chemotaxis.- Biochemistry of Sensory ... http://id.worldcat.org/fast/998489> # Light--Physiological effect. a schema:Intangible ;. schema:name "Light--Physiological ...
more infohttp://www.worldcat.org/title/sensory-perception-and-transduction-in-aneural-organisms/oclc/11969463

Signal-dependent turnover of the bacterial flagellar switch protein FliM. - Oxford NeuroscienceSignal-dependent turnover of the bacterial flagellar switch protein FliM. - Oxford Neuroscience

... coli expressing genomically encoded YPet derivatives of FliM at physiological levels. We show that the approximately 30 FliM ... The bacterial flagellar motor contains approximately 13 different proteins and provides an ideal system to study functional ... In many ways the bacterial flagellar motor is as an archetype macromolecular assembly, and our results may have further ... Algorithms, Bacterial Physiological Phenomena, Bacterial Proteins, Cell Membrane, Escherichia coli, Flagella, Image Processing ...
more infohttps://www.neuroscience.ox.ac.uk/publications/58610

A taxa-area relationship for bacteria.  - PubMed - NCBIA taxa-area relationship for bacteria. - PubMed - NCBI

Bacterial Physiological Phenomena*. *Biodiversity*. *Ecosystem*. *Geologic Sediments/microbiology. *Linear Models. *Phylogeny. ... We found that bacterial communities located close together were more similar in composition than communities located farther ...
more infohttps://www.ncbi.nlm.nih.gov/pubmed/15592412?dopt=Abstract
  • We found that bacterial communities located close together were more similar in composition than communities located farther apart, and we used the decay of community similarity with distance to show that bacteria can exhibit a taxa-area relationship. (nih.gov)
  • Quorum sensing is a phenomenon that allows both Gram-negative and Gram-positive bacteria to sense one another and to regulate a wide variety of physiological activities. (wikipedia.org)
  • Phage ecology additionally draws (extensively) from microbiology, particularly in terms of environmental microbiology, but also from an enormous catalog (90 years) of study of phage and phage-bacterial interactions in terms of their physiology and, especially, their molecular biology. (wikipedia.org)
  • In the mid 1910s, when phage were first discovered, the concept of phage was very much a whole-culture phenomenon (like much of microbiology), where various types of bacterial cultures (on solid media, in broth) were visibly cleared by phage action. (wikipedia.org)
  • This shift, paralleled in much of the rest of microbiology , represented a retreat from a much more ecological view of phages (first as bacterial killers, and then as organisms unto themselves). (wikipedia.org)
  • Bacterial Shedding" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)
  • The sexual processes include bacterial transformation, eukaryotic meiotic sex and virus multiplicity reactivation. (cdc.gov)
  • Microarray and next generation sequencing approaches are being used to investigate developmental, physiological and stress response processes, dissect epigenetic and small RNA pathways, and build large gene regulatory networks 1-3 . (jove.com)
  • As there exist estimates of bacterial numbers on Earth of approximately 1030, there consequently is an expectation that 1031 or more individual virus (mostly phage) particles exist , making phages the most numerous category of "organisms" on our planet. (wikipedia.org)
  • 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 levels. (ox.ac.uk)
  • Microbial endocrinology in the microbiome-gut-brain axis: how bacterial production and utilization of neurochemicals influence behavior. (cdc.gov)
  • This graph shows the total number of publications written about "Bacterial Shedding" by people in Harvard Catalyst Profiles by year, and whether "Bacterial Shedding" was a major or minor topic of these publication. (harvard.edu)
  • article{reichhart_tlr5_2003, title = {TLR5 takes aim at bacterial propeller}, author = { Jean-Marc Reichhart}, doi = {10.1038/ni1203-1159}, issn = {1529-2908}, year = {2003}, date = {2003-12-01}, journal = {Nat. (cnrs.fr)
  • Phage-ecological interactions are also qualitatively diverse: There are huge numbers of environment types, bacterial-host types, and also individual phage types The study of phage ecology reflects established scientific disciplines in ecological studies in scope, the most obvious being general ecology. (wikipedia.org)
  • This phenomenon was termed "autoinduction" because it involved a molecule (autoinducer) that accumulated in a growth medium and induced the synthesis of components of the luminescence system. (wikipedia.org)