1,720,964 research outputs found
Antibiotics and antimicrobial resistance mechanism of entry in the environment
Full text linkAn overwhelming amount of antibiotics that can penetrate the human body over water and food accelerates the development of resistant bacteria and reduces the efficacy of the drugs, which, in the opinion of experts, will cause benign injuries to become deadly. Antibiotics in uncontrolled quantities produce resistance and is an ecological disaster. It is unlikely because the standards for the production of medicines are extremely rigid and the fact that they are ignoring them automatically closes. This would lead to a great deal of fish, plant and animal life, and certainly would affect people's health. People would take water containing decomposed antibiotics, which would affect the function of the digestive tract and resistance to antibiotics. This suggests that antibiotics can be independent and at the same time induce potentially dangerous biofilm formations in other bacteria and that the pathway activity can be transmitted through specific signal pathologies. This generates the underlying discussion of evolution in antibiotic activity and the fact that some antibiotics used for therapy may be induced biofilms form in many strong and specific ways, which have broad implications for human health
Environmental Pollution of Soil and Anthropogenic Impact of Polymetallic Hydrothermal Extractions: Case Study—Bregalnica River Basin, Republic of Macedonia
Full text linkThe distribution of certain elements, which in higher content represents hazard to the environment, causes certain unwanted consequences on human health. Therefore, the environmental monitoring not only for the lithogenic but also for the anthropogenic distribution leads to determination of the main hot spots in environment. The anthropogenic activities for exploitation of natural resources and their processing represent a global problem of pollution of the environment. Bregalnica River Basin in the eastern part of the Republic of Macedonia was selected as a study area with the presence of three potential emission sources: lead and zinc mines („Zletovo” and „Sasa” mines) and copper mine („Bučim” mine). Lithogenic and anthropogenic distribution of 69 elements was evaluated in alluvial, automorphic and paddy soil from Bregalnica River Basin. Determination of the total elements contents was performed using mass spectrometry with inductively coupled plasma (ICP-MS) and atomic emission spectrometry with inductively coupled plasma (ICP-AES). The obtained values for the contents of certain potentially toxic elements show significantly higher values in all types of samples taken from the vicinity of the mines, characterized with anthropogenic impacts. Soil analysis indicates that the lithogenic distribution is represented by six geochemical associations. The anthropogenic distribution represents the factor F2 (Cu, Pb, Sb, Cd, Sn, Zn, Te), where the regions of mines cover 90 percentile of the contents of these elements. Intensive polymetallic depositions were recorded only in the surroundings of the localities where the hydrothermal extractions are implemented
Strong resonance interaction in 4-{4-[2-(3-dicyanomethylene-5,5-dimethyl-cyclohex-1-enyl)-vinyl]-phenoxy}-butyric acid. Structural, electrochemistry and spectroscopic properties complemented by Natural Bond Orbital and Hirshfeld surface analysis
No full textThe present investigation deals with the synthesis and characterization of (E)-4-(4-(2-(3-(dicyanomethylene)-5,5-dimethylcyclohex-1-en-1-yl)vinyl)phenoxy)butanoic acid (SLN-01) and its electrochemical and structural study. The compound SLN-01, has been characterized by UV, FTIR, and multinuclear (1H and 13C) NMR spectroscopic studies. DFT calculations were used to estimate redox potential and band gap energies of SLN-01. It's molecular and crystal structures were determined by single-crystal X-ray analysis. The compound (E)-4-(4-(2-(3-(Dicyanomethylene)-5,5-dimethylcyclohex-1-en-1-yl)vinyl)phenoxy) butanoic acid (SLN-01) was crystallized in the triclinic geometry. The Hirshfeld surface analysis was conducted to confirm the supramolecular association formed by the individual conformers and overall packing in the crystal. Natural Bond Orbital population analysis was performed to understand the electronic interactions between the donor and acceptor moieties in the molecule. The targeted compound exhibited a strong absorption at 416 nm (ε= 67,762 ± 4600 L mol−1 cm−1) with emission (λem) at 575 nm (at excitation wavelength λex= 430 nm).Fil: Shabir, Ghulam. Quaid-I-Azam University; PakistánFil: Arooj, Sama. Quaid-I-Azam University; PakistánFil: Saeed, Aamer. Quaid-I-Azam University; PakistánFil: Hashmi, Muhammad Zaffar. University Of The Punjab; PakistánFil: Hökelek, Tuncer. Hacettepe University; TurquíaFil: Erben, Mauricio Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; Argentin
Role of flame-retardants as EDCs in metabolic disorders
Full text linkThe destructive potential of fire is well known and thus it makes sense to prevent it from happening at all, or slow its rate of spread and to be able to stop it as soon as it happens in undesirable situations. Flame retardants (FRs), as the name indicates, are chemical substances with the capability of slowing down or preventing the growth of fire, have been used in many households and industrial products for a while now. Many kinds of FRs are currently in use, such as halogenated, organophosphosphate, nitrogenous, inorganic and intumescent coatings. These products are also well known to have many side effects, including carcinogenicity, reproductive toxicity, endocrine disruption, and immune system disorders. Not all fire retardants are made or function the same way thus vary in extent of fire-retardant capacity as well as toxic side effects. Herein we succinctly describe various classes of chemical FRs, and associated biological hazards to humans. We have also described underlying mechanisms or pathways that may possibly be involved in inducing endocrine disruption leading to obesity, diabetes, oxidative stress and inflammatory responses
Parameters Affecting Stakeholder’s Satisfaction Level Towards the Service Quality of the Bangkok Metropolitan Administration Under the Context of United Nations-Sustainable Development Goals (UN-SDGs)
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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