112,273 research outputs found
The nucleolus is well-posed
No full textAbstractThe lexicographic order is not representable by a real-valued function, contrary to many other orders or preorders. So, standard tools and results for well-posed minimum problems cannot be used. We prove that under suitable hypotheses it is however possible to guarantee the well-posedness of a lexicographic minimum over a compact or convex set. This result allows us to prove that some game theoretical solution concepts, based on lexicographic order are well-posed: in particular, this is true for the nucleolus
PALMOPLANTAR KERATODERMA WITH SCLERODACTYLY (HURIEZ SYNDROME)
No full textA syndrome characterized by palmoplantar keratoderma, sclerodactyly, and skin cancer was first described in two families by Huriez et al. The pattern of inheritance was compatible with that of an autosomal dominant disorder. We report a patient with this condition and review the literature
Microbiological Assessment of the Quality of Some Commercial Products Marketed as Lactobacillus crispatus-Containing Probiotic Dietary Supplements
No full textn the last decade, many authors have reported low viability for probiotic products. Investigators commonly find they are not meeting claimed active counts and/or incorrect species and/or strains have been identified. We have therefore decided to verify viability, the real dose and species correspondence in nine probiotic products (seven nutritional supplements and two medical devices) collected from the Italian and French markets claiming to contain at least one strain of L. crispatus among the different species/strain included in the formulation. In fact, the medical relevance of L. crispatus strains has recently grown., as evaluating the possible dominance clusters typical of the vaginal microbiota, the Community State Type I, the one dominated by L. crispatus, appears to be "protective" in terms of infections, fertility and gestational duration of pregnancy. The results obtained demonstrate the generally poor quality of probiotics. Out of nine products, only two definitely contained viable Lactobacillus crispatus cells with a daily dose of at least 1 × 109 CFU/g and with an acceptable correspondence with what is declared on the label. Among these two, only one was found to be formulated with a strain (M247) that has been scientifically documented
Adhesion of ectomycorrhizal bacteria to plant cells: an in vitro evidence.
No full textIn this study we have investigated, by combining microbial and microscopical techniques, the adhesion ability of bacteria present in Tuber borchii ectomycorrhizosphere. Our data demonstrate that a common pool of bacteria - Pseudomonas, Bacillus, Micrococcus and Moraxella - occurs in all ectomycorrhizal homogenates and that most of these bacteria are able to attach in vitro to plant cells
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
In vitro ability of essential oils and surfactants to enhance the antimicrobial activity of preservative agents against Pseudomonas aeruginosa and Staphylococcus aureus
No full textThe aim of this study is to evaluate possible
synergistic antimicrobial interactions between common
cosmetic preservatives and selected essential oils or surfactants.
The antimicrobial efficacy of six essential oils,
three surfactants and five preservatives against Pseudomonas
aeruginosa ATCC 9027 and Staphylococcus aureus
ATCC 43387 was assessed by a broth micro-dilution assay.
MICs for individual and combined antimicrobials were
determined and then transformed to fractional inhibitory
concentration (FIC) indexes. All essential oils exhibited
antibacterial activity; among surfactants, bacteria resulted
most susceptible to the cationic agent. Synergy was
observed when essential oils of eucalyptus and mint were
combined with methylparaben against P. aeruginosa, while
essential oils of mint, oregano and sage combined with
propylparaben and imidazolidinyl urea acted against S.
aureus. Many binary mixtures of preservatives and surfactants
produced synergistic activity with the most effective
interactions involving the cationic and amphoteric
compounds under study. FIC indexes demonstrated synergistic
effects when preservatives were combined with
either essential oils or surfactants against both bacterial
strains. These results highlight the potential usefulness of
essential oils and surfactants to enhance the activities of
conventional biocides. This kind of study should contribute
to the selection and optimization of preservative systems
for cosmetic preparations
Cost Allocation in a Bank ATM Network
No full textWe consider a situation in which a group of banks consider connecting their Automated TellerMachines (ATMs) in a network, so that the banks customers may use ATMs of any bank in the network.The problem studied is that of allocating the total transaction costs arising in the network, among the participating banks.The situation is modeled as a cooperative game with transferable utility. We propose two allocation rules, and discuss their relation to the core and other well-known solution concepts, as well as to population monotonicity.cost allocation;banks;networks;transaction costs
Microbial study of cosmetic products during their use by consumers: health risk and efficacy of preservative systems
No full textTo evaluate the microbial contamination of 91 cosmetics (23 o/w emulsions,
47 tensiolytes, 21 aqueous pastes) in three different states of use (intact,
in-use, ending product) and the protection efficacy of the preservative systems
most frequently used in the analysed cosmetic formulations.
Methods and Results: Total bacterial count, isolation and identification of
pathogenic isolates were performed on the collected cosmetics. About 10Æ6% of
tensiolytes (13Æ5% bath foam, 6Æ7% shampoo, 10% liquid soaps) were contaminated
by Staphylococcus warneri, Staphylococcus epidermidis and Pseudomonas
putida. The efficacy of the preservative systems of two cosmetic products, tested
against standard micro-organisms (Staphylococcus aureus ATCC 4338 and Pseudomonas
aeruginosa ATCC 9027) and two isolates from cosmetics in this study
(S. epidermidis and P. putida), satisfied the Cosmetics, Toiletries, and Fragrance
Association and Official Italian Pharmacopeia criteria, while only one tested
cosmetic respected the Rapid Challenge Test criterion.
Conclusions: Contaminated cosmetic products are relatively uncommon, but
some products, unable to suppress the growth of several micro-organisms, represent
a potential health hazard.
Significance and Impact of the Study: The challenge test may be performed
not only during the preparation of the preservative system in the intact cosmetics,
but also be used to evaluate the protection efficacy during their use
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