5,045 Works

Identification and characterization of microbial biofilm communities associated with corroded oil pipeline surfaces

Tiffany R. Lenhart, Kathleen E. Duncan, Iwona B. Beech, Jan A. Sunner, Whitney Smith, Vincent Bonifay, Bernadette Biri & Joseph M. Suflita
Microbially influenced corrosion (MIC) has long been implicated in the deterioration of carbon steel in oil and gas pipeline systems. The authors sought to identify and characterize sessile biofilm communities within a high-temperature oil production pipeline, and to compare the profiles of the biofilm community with those of the previously analyzed planktonic communities. Eubacterial and archaeal 16S rRNA sequences of DNA recovered from extracted pipeline pieces, termed ‘cookies,’ revealed the presence of thermophilic sulfidogenic anaerobes,...

Chemical composition of essential oils and hydrosols from fresh flowers of Cerasus subhirtella and Cerasusserrulata from East China

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Essential oils and hydrosols from fresh flowers of Cerasus subhirtella (Miq.) Sok. and Cerasusserrulata (Lindl.) London from East China were analysed by gas chromatography and gas chromatography–mass spectrometry for the first time. The major components of the essential oils from C. subhirtella and C.serrulata were benzaldehyde (31.2% and 42.1%, respectively), tricosane (23.1% and 27.7%, respectively) and pentacosane (23.2% and 19.0%, respectively). The main constituents of the hydrosol volatiles from C. subhirtella and C.serrulata were benzaldehyde...

THE INFLUENCE OF SWIMMING ON THE VERTICAL AND HORIZONTAL DISTRIBUTION OF MARINE INVERTEBRATE LARVAE

Remi Daigle
Abstract:
This thesis aims to increase our understanding of mechanisms that influence larval dispersal in marine benthic invertebrates, particularly in the absence of strong oceanographic features (e.g. estuarine plumes, upwelling events, or markedly different water masses). Laboratory experiments identified behavioural mechanisms that regulate the vertical distribution of larvae in response to thermal stratification, and field studies in St. George’s Bay, Nova Scotia (NS), Canada, examined the relationship between larval abundance and physical variables (temperature, salinity, fluorescence,...

Organising Collective Responsibility: On Precaution, Codes of Conduct and Understanding Public Debate

Rene Von Schomberg
This paper makes a case for organizing collective responsibility through
instruments beyond the regulatory system, such as codes of conduct and various
deliberative assessment mechanisms within and outside the policy context. The
paper reviews the requirements for implementing an ethics of co-responsibility,
with a view to the challenges current and prospective developments in nanoscience
and nanotechnologies impose on the regulatory systems of modern societies.

Of Needles and Haystacks: Building an Accurate Statewide Dropout Early Warning System in Wisconsin

Jared Knowles
The state of Wisconsin has one of the highest four year graduation rates in the nation, but deep disparities among student subgroups remain. To address this the state has created the Wisconsin Dropout Early Warning System (DEWS), a predictive model of student dropout risk for students in grades six through nine. The Wisconsin DEWS is in use statewide and currently provides predictions on the likelihood of graduation for over 225,000 students. DEWS represents a novel...

academic teacher in the society of knowledge

Aleksander Kobylarek
The modern society is changing deeply and rapidly in almost every area and each dimension. Some institutions have changed more rapidly and the others less or they have tried to avoid process of changing at all. Especially the total institutions should be mentioned as the organizations, which are trying to avoid the changes. The reason is very simple- the mission of such institution is to transmit the culture, tradition and patterns of behavior. In every...

Physico-chemical properties and cytotoxic potential of Cordyceps sinensis metabolites

Eun-Jeong Lee, , Seon-Young Im, , Muhammad Farooq, Rozbeh Farhoudi & Dong-Jin Lee
This study was conducted to estimate the antioxidant activities, biochemical properties and biological activities of one of the entomopathogenic fungi, Cordyceps sinensis. Analysis of fungal metabolites indicated that the most abundant free sugar was glucose; the highest component of organic acids was citric acid from 10-day culture medium and the glutamate was the predominant amino acid observed from 3-day culture medium. Maximum total polyphenols and flavonoids were detected in the 15-day culture medium. For cytotoxicity...

Effectiveness of Electronic Stability Control on Single-Vehicle Accidents

Allan Lyckegaard, Tove Hels & Inger Marie Bernhoft
Objective: This study aims at evaluating the effectiveness of electronic stability control (ESC) on single-vehicle injury accidents while controlling for a number of confounders influencing the accident risk.Methods: Using police-registered injury accidents from 2004 to 2011 in Denmark with cars manufactured in the period 1998 to 2011 and the principle of induced exposure, 2 measures of the effectiveness of ESC were calculated: The crude odds ratio and the adjusted odds ratio, the latter by means...

Diretório de políticas editoriais brasileiras sobre o acesso aberto: o serviço Diadorim

Michelli Costa
Directory of brazilian editorial policies about open access: the service Diadorim

An integrated use of multiple biomarkers to investigate the individual and combined effect of copper and cadmium on the marine green mussel (Perna viridis)

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The present study documents individual and combined sub-lethal effect of one redox active (copper) and one non-redox active (cadmium) metal on green mussel (Perna viridis). The mussels were exposed to 60 μg L−1 of Cu and 150 μg L−1 of Cd (individually and in combination) for 21 days. Histopathological and ultrastructural studies revealed significant metal induced alterations such as vacuolization, fusion of gill lamellae, enhance mucous deposition, hyperplasia and necrosis in gills. Antioxidant enzyme assays...

Koncepcja solidarności pokoleń w krajowej polityce społecznej

Andrzej Klimczuk
The article discusses the main features of "solidarity of generations" concept. This approach is used in the analysis of the ageing process at the beginning of the XXI century as well as in designing of public policy. Essay introduces the basic concepts of generations and relationships between generations meaning. Article emphasizes that solidarity between generations is a social issue that requires the combined intervention of public, commercial and non-commercial bodies. Paper presents a conclusions from...

Typical river transport for Banjarmasin based on the criteria of the National Transportation System

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International Refereed Journal of Engineering and Science (IRJES), ISSN (Online) 2319-183X, (Print) 2319-1821, Volume 3, Issue 8 (August 2014), PP.28-37

To the problem of verbal aggression in pedagogical discourse

Published in: Український смисл, No 1, 2012, pp. 129-136. Abstract Nowadays linguistic studies are aimed at the discourse-centered paradigm.Thus, analyzing the phenomenon of verbal aggression in pedagogical discourse seems to be very urgent. The article describes the phenomenon of verbal aggression as a really existing component of the pedagogical medium and outlines the main possible strategies of overcoming it.

From back-arc rifting to arc accretion: the Late Jurassic–Early Cretaceous evolution of the Guerrero terrane recorded by a major provenance change in sandstones from the Sierra de los Cuarzos area, central Mexico

Norma Betania Palacios-García & Michelangelo Martini
The Guerrero terrane is composed of Middle Jurassic–Lower Cretaceous arc assemblages that were rifted from the North American continental mainland during Late Jurassic–Early Cretaceous back-arc spreading within the Arperos Basin, and subsequently accreted back to the continental margin in the late Aptian. The Sierra de los Cuarzos area is located just 50 km east of the Guerrero terrane suture belt and, therefore, its stratigraphic record should be highly sensitive to first-order tectonic changes. Two Upper...

A Methodology for Scaling Biophysical Models

Peter Scarth
The science of remote sensing is based on analyses of the spectral and spatial information contained in electromagnetic radiation reflected or emitted from the earth's surface. The development of predictive analytical and semi-analytical models defining radiative-transfer processes associated with earth surface processes and structures are based on the relationship between the biophysical variables of interest and the signal received by an airborne or satellite sensor. This forward modelling approach provides a mathematical basis to enable...

Design × innovation: perspective or evidence-based practices

Andy Dong
The concept of design-led innovation is gaining importance in both the design studies and innovation research areas by drawing attention to design and its strategic value for innovation. This paper offers a critical review of academic articles, books, and national innovation assessment instruments on the conceptualizations and claimed outcomes of design-led innovation. The review identified three conceptualizations: outcome-, process-, and dominant logic-oriented conceptualizations, which differ in the manner by which design influences innovation outcomes. Claimed...

Cytotoxicity and comparative binding mechanism of piperine with human serum albumin and α-1-acid glycoprotein

Daniel Pushparaju Yeggoni, Aparna Rachamallu, Monika Kallubai &
Human serum albumin (HSA) and α-1-acid glycoprotein (AGP) (acute phase protein) are the plasma proteins in blood system which transports many drugs. To understand the pharmacological importance of piperine molecule, here, we studied the anti-inflammatory activity of piperine on mouse macrophages (RAW 264.7) cell lines, which reveals that piperine caused an increase in inhibition growth of inflammated macrophages. Further, the fluorescence maximum quenching of proteins were observed upon binding of piperine to HSA and AGP...

Observations of a Correlation Between Primary Particle and Aggregate Size for Soot Particles

Ramin Dastanpour & Steven N. Rogak
For decades, soot has been modeled as fractal-like aggregates of nearly equiaxed spherules. Cluster–cluster aggregation simulations, starting from a population of primary particles, give rise to structures that closely match real aerosols of solid particles produced in flames. In such simulations, primary particle size is uncorrelated with aggregate size, as all aggregates contain primary particles drawn from the same population. Aerosol measurements have been interpreted with this geometric model. Examination of transmission electron micrographs of...

The stupid 5$ bill, rough draft short story.

Kris Kitchen
The 1st draft of the original work " billy" Currently a work in progress.

A new meroterpenoid tatenoic acid from the fungus Neosartorya tatenoi KKU-2NK23

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A new meroterpenoid, named tatenoic acid (1), was isolated from the fungus Neosartorya tatenoi KKU-2NK23, together with five known compounds, aszonapyrones A and B (2 and 3), aszonalenin (4), ergosterol (5) and d-mannitol (6). Their structures were established on the basis of spectroscopic methods. Aszonapyrones A (2) exhibited antimalarial activity against Plasmodium falciparum, and it also exhibited cytotoxicity against two cancer cell lines, NCI-H187 and KB.

Structure and hypolipidaemic activity of fucoidan extracted from brown seaweed Sargassum henslowianum

Ho Duc Cuong, Thanh Thi Thu Thuy, Tran Thu Huong, & Tran Thi Thanh Van
The aim of this study is to elucidate the structure and investigate the hypolipidaemic activity of a fucoidan extracted from brown seaweed Sargassum henslowianum collected at Hai Van–Son Cha peninsula, Hue province, Vietnam by using tandem electrospray ionisation mass spectrometry. The results demonstrated that the fucoidan has α(1 → 3)-linked l-fucopyranose backbone and sulphate groups occupied mostly at C-2, C-4 and sometimes at C-3 position of fucose residues. The results of in vivo bioactivity examination...

Isolation and structural elucidation of novel antimicrobial compounds from maggots of Chrysomyis megacephala Fabricius

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The excretions/secretions from the maggot of Chrysomyis megacephala Fabricius are traditionally used to treat serious infections in China. In this study, bioassay-guided fractionation led to the isolation of three novel antibacterial compounds (1–3), including important fluorinated compounds (3 and 5), together with other nine known compounds from 70% methanol extract of C. megacephala. The structures of the new compounds were elucidated by NMR spectroscopic analysis and high-resolution mass spectroscopy. The antibacterial activities of the isolated...

A General Model of Random Variation

Haim Shore
A statistical distribution of a random variable is uniquely represented by its normal-based quantile function. For a symmetrical distribution it is S-shaped (for negative kurtosis) and inverted S-shaped (otherwise). As skewness departs from zero, the quantile function gradually transforms into a monotone convex function (positive skewness) or concave function (otherwise). Recently, a new general modeling platform has been introduced, response modeling methodology, which delivers good representation to monotone convex relationships due to its unique “continuous...

GC–MS characterisation and antibacterial activity evaluation of Nigella sativa oil against diverse strains of Salmonella

Arslan Sarwar & Zakia Latif
Salmonella resistance is becoming a worldwide serious health issue in these days; therefore, it is an urgent need to develop some alternative approaches to overcome this problem. Twenty bacterial strains were isolated and purified from different environmental sources and confirmed as Salmonella by morphological and biochemical analyses. Further confirmation was done by 16s rRNA sequencing. Antibiotic susceptibility test was performed by well diffusion assay against different concentrations of Ceftriaxone and Ciprofloxacin. The behaviour of both...

Efficient Synthesis of New Stable 1,4-diionic Organosulfurs and Corresponding Mesoionic Compounds from N-Heterocyclic Ylides

, Reza Heydari, , Hamideh Saravani & Claudia Graiff
N-Phenacyl heterocyclic salts such as isoquinolinium, quinolinium, and pyridinium bromide react quickly with benzoyl isothiocyanate in the present of triethylamine to produce 1,4-diionic organosulfur derivatives. Cyclization and dehydrogenation of 1,4-diionic organosulfurs gave thiazoloisoquinolinium, quinolinium, or pyridinium benzimidates. [Supplementary materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements for the following free supplemental files: Figures.].

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