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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Effect of chlorpyrifos on molecular biomarkers in different parts of the body of earthworm Lumbricus terrestris L.
No full textKlorpirifos je organofosfatni insekticid koji se koristi u poljoprivrednoj
industriji. Primarni mu je cilj suzbijanje štetnih kukaca, no utječe i na druge neciljne organizme tla. Gujavice
održavaju kvalitetu tla perturbacijom i prozračivanjem. Svojom vlažnom kožom te unosom u probavilo apsorbiraju
različite kemijske spojeve što ih čini idealnim modelnim organizmima za ekotoksikološka istraživanja. Cilj je
ovoga istraživanja odrediti razlike u odgovoru molekularnih biomarkera: acetilkolinesteraze (AChE), katalaze
(CAT), glutation S-transferaze (GST) i reaktivnih supstanci tiobarbiturne kiseline (TBARS) u prednjem i
stražnjem dijelu te u cijelom tijelu gujavice Lumbricus terrestris uslijed izlaganja različitim koncentracijama
klorpirifosa.: Chlorpyrifos is an organophosphate insecticide used in agriculture. Primary goal is insect control, but it
has effect on non-target organisms as well. Earthworms maintain soil quality by perturbation and aeration. They
absorb different chemicals through their moist skin and with ingestion making them a perfect model organism in
ecotoxicological research. Aim of this research is to asses different response in molecular biomarkers:
acetylcholinesterase (AChE), catalase (CAT), glutathione S-transferase (GST) and thiobarbituric acid reactive
substances (TBARS) in anterior and posterior part, as well as in a whole body in earthworm Lumbricus terrestris
during the chlorpyrifos exposure
UČINAK METAL(OID)A NA BIOMARKERE U KRVI PTIĆA BIJELE RODE (Ciconia ciconia) NA PODRUČJU KONTINENTALNE HRVATSKE
No full textApex bird species are proven to be relevant bioindicators for assessing environmental
pollutants. To achieve this, the goal of this work was to compare biomarker responses in two
fractions of white stork (Ciconia ciconia) nestling blood; establish novel biomarker approaches
(esterase, fluorescent dyes, metallothioneins), apply previously analysed biomarkers
(glutathione-dependent enzymes); investigate the differences in biomarker responses related to
metal(loid)s in white stork nestling's blood from Croatia. Results indicate differences between
the fractions in biomarker response based on variability. The pollutant impact from the
surrounding metal, petroleum, and agricultural industry appears to affect the biomarkers
responses/levels in white stork nestlings, which are often seen as early-warning signals.
Observed increased metal(loid) levels at the landfill and agricultural areas might cause adverse
effects on the nestlings. This first-time metal(loid) analyses in Croatian white stork nestlings
indicate the necessity of biomonitoring and local assessments of pollution impact to prevent
detrimental effects on the environment.Bijela roda izvrsna je modelna vrsta za praćenje zagađenja u okolišu. U ovom doktorskom radu
provedeno je istraživanje odgovora biomarkera i koncentracije metal(oid)a u krvi ptića bijele
rode (Ciconia ciconia) s područja Hrvatske. Ciljevi rada su: usporediti odgovore biomarkera u
dvije frakcije krvi, uspostaviti nove protokole za mjerenje biomarkera (aktivnost esteraze,
fluorescentne boje za detekciju oksidativnog stresa i razine metalotioneina), primijeniti
prethodno analizirane biomarkere (glutation-ovisne enzime) i istražiti razlike u odgovorima
biomarkera vezanih za metal(oid)e. Rezultati ukazuju na razlike između frakcija u odgovoru
biomarkera. Moguć je utjecaj zagađivala iz okolne metalne, naftne i poljoprivredne industrije
na biomarkere u ptićima bijele rode, koji se često smatraju ranim znakovima upozorenja.
Povećane razine metal(loid)a na odlagalištima i poljoprivrednim površinama mogu uzrokovati
štetne učinke na ptiće. Ovo je prvo istraživanje metal(loid)a u ptićima bijele rode s područja
Hrvatske te ukazuju na neophodan monitoring za procjenu utjecaja zagađenja kako bi se
spriječili štetni učinci
Simulation and setup of the artificial egg for toxicity testing of pesticides and nanoparticles
Get PDFRazvoj umjetnog jajeta je koristan kako za primjenjena tako i za temeljna istraživanja u područjima embriologije, animalne fiziologije i histologije. U ovom radu su isprobavani razni uvjeti kondicioniranja umjetnog jajeta (vrijeme preinkubacije, metoda razbijanja ljuske, prijanjajuća folija) kako bi se utvrdili optimalni.The development of artificial egg would be useful in the applied as well as in the fundamental research in the fields of embriology, animal physiology and histology. In this thesis various parameters of artificial egg conditioning (preincubation periods, eggshell cracking, transparent plastic film,) were examined with purpose to establish optimal conditions
UČINAK METAL(OID)A NA BIOMARKERE U KRVI PTIĆA BIJELE RODE (Ciconia ciconia) NA PODRUČJU KONTINENTALNE HRVATSKE
No full textApex bird species are proven to be relevant bioindicators for assessing environmental
pollutants. To achieve this, the goal of this work was to compare biomarker responses in two
fractions of white stork (Ciconia ciconia) nestling blood; establish novel biomarker approaches
(esterase, fluorescent dyes, metallothioneins), apply previously analysed biomarkers
(glutathione-dependent enzymes); investigate the differences in biomarker responses related to
metal(loid)s in white stork nestling's blood from Croatia. Results indicate differences between
the fractions in biomarker response based on variability. The pollutant impact from the
surrounding metal, petroleum, and agricultural industry appears to affect the biomarkers
responses/levels in white stork nestlings, which are often seen as early-warning signals.
Observed increased metal(loid) levels at the landfill and agricultural areas might cause adverse
effects on the nestlings. This first-time metal(loid) analyses in Croatian white stork nestlings
indicate the necessity of biomonitoring and local assessments of pollution impact to prevent
detrimental effects on the environment.Bijela roda izvrsna je modelna vrsta za praćenje zagađenja u okolišu. U ovom doktorskom radu
provedeno je istraživanje odgovora biomarkera i koncentracije metal(oid)a u krvi ptića bijele
rode (Ciconia ciconia) s područja Hrvatske. Ciljevi rada su: usporediti odgovore biomarkera u
dvije frakcije krvi, uspostaviti nove protokole za mjerenje biomarkera (aktivnost esteraze,
fluorescentne boje za detekciju oksidativnog stresa i razine metalotioneina), primijeniti
prethodno analizirane biomarkere (glutation-ovisne enzime) i istražiti razlike u odgovorima
biomarkera vezanih za metal(oid)e. Rezultati ukazuju na razlike između frakcija u odgovoru
biomarkera. Moguć je utjecaj zagađivala iz okolne metalne, naftne i poljoprivredne industrije
na biomarkere u ptićima bijele rode, koji se često smatraju ranim znakovima upozorenja.
Povećane razine metal(loid)a na odlagalištima i poljoprivrednim površinama mogu uzrokovati
štetne učinke na ptiće. Ovo je prvo istraživanje metal(loid)a u ptićima bijele rode s područja
Hrvatske te ukazuju na neophodan monitoring za procjenu utjecaja zagađenja kako bi se
spriječili štetni učinci
Variations on the Author
Get PDF“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
UČINAK METAL(OID)A NA BIOMARKERE U KRVI PTIĆA BIJELE RODE (Ciconia ciconia) NA PODRUČJU KONTINENTALNE HRVATSKE
No full textApex bird species are proven to be relevant bioindicators for assessing environmental
pollutants. To achieve this, the goal of this work was to compare biomarker responses in two
fractions of white stork (Ciconia ciconia) nestling blood; establish novel biomarker approaches
(esterase, fluorescent dyes, metallothioneins), apply previously analysed biomarkers
(glutathione-dependent enzymes); investigate the differences in biomarker responses related to
metal(loid)s in white stork nestling's blood from Croatia. Results indicate differences between
the fractions in biomarker response based on variability. The pollutant impact from the
surrounding metal, petroleum, and agricultural industry appears to affect the biomarkers
responses/levels in white stork nestlings, which are often seen as early-warning signals.
Observed increased metal(loid) levels at the landfill and agricultural areas might cause adverse
effects on the nestlings. This first-time metal(loid) analyses in Croatian white stork nestlings
indicate the necessity of biomonitoring and local assessments of pollution impact to prevent
detrimental effects on the environment.Bijela roda izvrsna je modelna vrsta za praćenje zagađenja u okolišu. U ovom doktorskom radu
provedeno je istraživanje odgovora biomarkera i koncentracije metal(oid)a u krvi ptića bijele
rode (Ciconia ciconia) s područja Hrvatske. Ciljevi rada su: usporediti odgovore biomarkera u
dvije frakcije krvi, uspostaviti nove protokole za mjerenje biomarkera (aktivnost esteraze,
fluorescentne boje za detekciju oksidativnog stresa i razine metalotioneina), primijeniti
prethodno analizirane biomarkere (glutation-ovisne enzime) i istražiti razlike u odgovorima
biomarkera vezanih za metal(oid)e. Rezultati ukazuju na razlike između frakcija u odgovoru
biomarkera. Moguć je utjecaj zagađivala iz okolne metalne, naftne i poljoprivredne industrije
na biomarkere u ptićima bijele rode, koji se često smatraju ranim znakovima upozorenja.
Povećane razine metal(loid)a na odlagalištima i poljoprivrednim površinama mogu uzrokovati
štetne učinke na ptiće. Ovo je prvo istraživanje metal(loid)a u ptićima bijele rode s područja
Hrvatske te ukazuju na neophodan monitoring za procjenu utjecaja zagađenja kako bi se
spriječili štetni učinci
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Get PDFWe 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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