cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.11313569.v1
title: Numerical Simulations to Assess ART and MART Performance for Ionospheric Tomography of Chapman Profiles

description: ABSTRACT The incomplete geometrical coverage of the Global Navigation Satellite System (GNSS) makes the ionospheric tomographic system an ill-conditioned problem for ionospheric imaging. In order to detect the principal limitations of the ill-conditioned tomographic solutions, numerical simulations of the ionosphere are under constant investigation. In this paper, we show an investigation of the accuracy of Algebraic Reconstruction Technique (ART) and Multiplicative ART (MART) for performing tomographic reconstruction of Chapman profiles using a simulated optimum scenario of GNSS signals tracked by ground-based receivers. Chapman functions were used to represent the ionospheric morphology and a set of analyses was conducted to assess ART and MART performance for estimating the Total Electron Content (TEC) and parameters that describes the Chapman function. The results showed that MART performed better in the reconstruction of the electron density peak and ART gave a better representation for estimating TEC and the shape of the ionosphere. Since we used an optimum scenario of the GNSS signals, the analyses indicate the intrinsic problems that may occur with ART and MART to recover valuable information for many applications of Telecommunication, Spatial Geodesy and Space Weather.
DOI: 10.6084/m9.figshare.11313572.v1
title: New seminal variety of Stevia rebaudiana: Obtaining fractions with high antioxidant potential of leaves

description: ABSTRACT The aim of this study was to determine the composition and antioxidant potential of leaves of a new variety of Stevia rebaudiana (Stevia UEM-13). Stevia leaves of UEM-13 contain rebaudioside A as the main glycoside, while most wild Stevia plants contain stevioside. Furthermore can be multiplied by seed, which reduces the cost of plant culture techniques as other clonal varieties are multiplied by buds, requiring sophisticated and expensive seedling production systems. Ethanol and methanol were used in the extraction to determine the bioactive compounds. The methanolic extract was fractionated sequentially with hexane, chloroform, ethyl acetate and isobutanol, and the highest concentration of phenolic compounds and flavonoids was obtained in the ethyl acetate fraction (524.20 mg galic acid equivalent/g; 380.62 µg quercetin equivalent/g). The glycoside content varied greatly among the fractions (0.5% - 65.3%). Higher antioxidant potential was found in the methanol extract and the ethyl acetate fraction with 93.5% and 97.32%, respectively. In addition to being an excellent source for obtaining of extracts rich in glycoside, this new variety can also be used as raw material for the production of extracts or fractions with a significant amount of antioxidant activity and potential to be used as additives in food.
DOI: 10.6084/m9.figshare.11313581.v1
title: Ostracoda and foraminifera from Paleocene (Olinda well), Paraíba Basin, Brazilian Northeast

description: ABSTRACT Paleocene ostracods and planktonic foraminifera from the Maria Farinha Formation, Paraíba Basin, are herein presented. Eleven ostracod species were identified in the genera Cytherella Jones, Cytherelloidea Alexander, Eocytheropteron Alexander, Semicytherura Wagner, Paracosta Siddiqui, Buntonia Howe, Soudanella Apostolescu, Leguminocythereis Howe and, probably, Pataviella Liebau. The planktonic foraminifera are represented by the genera Guembelitria Cushman, Parvularugoglobigerina Hofker, Woodringina Loeblich and Tappan, Heterohelix Ehrenberg, Zeauvigerina Finlay, Muricohedbergella Huber and Leckie, and Praemurica Olsson, Hemleben, Berggren and Liu. The ostracods and foraminifera analyzed indicate an inner shelf paleoenvironment for the studied section. Blooms of Guembelitria spp., which indicate either shallow environments or upwelling zones, were also recorded reinforcing previous paleoenvironmental interpretations based on other fossil groups for this basin.
DOI: 10.6084/m9.figshare.11313563
title: The use of Proteinase K to access genitalia morphology, vouchering and DNA extraction in minute wasps

description: ABSTRACT Genitalia are rich source of characters in insect taxonomy. Usually, they are examined after dissection and cleaning with potassium hydroxide (KOH), procedure that may damage both genital morphological structures and intracellular molecular contents. Enzymatic procedure with Proteinase K has been used to clean muscle off the genitalia while extract DNA, but its damage to the genital structures has not been evaluated. Herein, we qualitatively compare the use of KOH and Proteinase K to prepare genital structures in minute insects (Hymenoptera: Bethylidae). We show that Proteinase K is better to preserve the genital structure and provides quality DNA.
DOI: 10.6084/m9.figshare.11313557
title: Recent patterns of occupational placement and mobility of paid domestic work in metropolitan Brazil: discontinuity and persistence

description: Abstract Essentially female, black/brown and poor, the occupation of domestic worker is treated differently even by the labor legislation. This paper aims to identify how the women’s life cycle, generations, and other individual characteristics, as well as the macroeconomic situation and institutional changes, affect their chances of being and remaining a domestic worker in the metropolitan areas of Brazil in recent years. Data from Monthly Employment Research, from 2002 to 2015, was applied in an age-period-cohort log-linear modeling of the transition and immobility frequencies from employment categories. The conjuncture aspect is the most influential, followed by cohort. This occupation is both shrinking and “getting older” as fewer young women are participating in this labor market while older women take up more space. This is related both to the postponement of retirement and the lowest occupational mobility at a later stage in life. Furthermore, being black/brown is largely influential on insertion and occupational mobility that is shifting across birth cohorts and decreasing overtime, even though the difference in probability for black/brown and white women being domestic workers remains constant. Moreover, domestic work is more unstable than other occupations, contradicting the previous notion of an occupational trap that was in fact due to individual characteristics of workers.
DOI: 10.6084/m9.figshare.11313563.v1
title: The use of Proteinase K to access genitalia morphology, vouchering and DNA extraction in minute wasps

description: ABSTRACT Genitalia are rich source of characters in insect taxonomy. Usually, they are examined after dissection and cleaning with potassium hydroxide (KOH), procedure that may damage both genital morphological structures and intracellular molecular contents. Enzymatic procedure with Proteinase K has been used to clean muscle off the genitalia while extract DNA, but its damage to the genital structures has not been evaluated. Herein, we qualitatively compare the use of KOH and Proteinase K to prepare genital structures in minute insects (Hymenoptera: Bethylidae). We show that Proteinase K is better to preserve the genital structure and provides quality DNA.
DOI: 10.6084/m9.figshare.11313548
title: Composition and microbiological analysis for quality evaluation of Kars Gravyer cheese: influence of ripening period

description: Abstract In this study; The objective is to demonstrate the total quality of the chemical and microbiological aspects of the Kars Gravyer cheese during the ripening period, produced by means of traditional method in dairy conditions. Production of Kars Gravyer cheese was performed in two replications. Titratable acidity (%l.a), salt content, total protein ratio, dry matter, fat content, dry matter in fat and dry matter in salt, total nitrogen and lipolysis rate content were determined by taking samples from the produced cheeses on specific days (day 0, 10, 25, 45, 60 and 90) and microbiological analyses were performed. By analysis the results of the Kars Gravyer cheese samples; significant changes in acidity, dry matter, salt, total nitrogen, protein, fat and dry matter in fat, dry matter in salt, lipolysis (ADV) values of cheese produced 90 days of maturation period were found significant (P&lt;0.001). The number of lactobacilli microorganisms and psychrophile microorganisms wasn’t significant (P&gt; 0.05). It was determined that the difference between total aerobic mesophilic microorganisms, lactococci bacteria and yeast counts of cheese was significant (P &lt; 0.001). Values obtained at the end of maturation stage was found to be between determined range in accordiance with TS 2174 Gravyer Standard.
DOI: 10.6084/m9.figshare.11313548.v1
title: Composition and microbiological analysis for quality evaluation of Kars Gravyer cheese: influence of ripening period

description: Abstract In this study; The objective is to demonstrate the total quality of the chemical and microbiological aspects of the Kars Gravyer cheese during the ripening period, produced by means of traditional method in dairy conditions. Production of Kars Gravyer cheese was performed in two replications. Titratable acidity (%l.a), salt content, total protein ratio, dry matter, fat content, dry matter in fat and dry matter in salt, total nitrogen and lipolysis rate content were determined by taking samples from the produced cheeses on specific days (day 0, 10, 25, 45, 60 and 90) and microbiological analyses were performed. By analysis the results of the Kars Gravyer cheese samples; significant changes in acidity, dry matter, salt, total nitrogen, protein, fat and dry matter in fat, dry matter in salt, lipolysis (ADV) values of cheese produced 90 days of maturation period were found significant (P&lt;0.001). The number of lactobacilli microorganisms and psychrophile microorganisms wasn’t significant (P&gt; 0.05). It was determined that the difference between total aerobic mesophilic microorganisms, lactococci bacteria and yeast counts of cheese was significant (P &lt; 0.001). Values obtained at the end of maturation stage was found to be between determined range in accordiance with TS 2174 Gravyer Standard.
DOI: 10.6084/m9.figshare.11313557.v1
title: Recent patterns of occupational placement and mobility of paid domestic work in metropolitan Brazil: discontinuity and persistence

description: Abstract Essentially female, black/brown and poor, the occupation of domestic worker is treated differently even by the labor legislation. This paper aims to identify how the women’s life cycle, generations, and other individual characteristics, as well as the macroeconomic situation and institutional changes, affect their chances of being and remaining a domestic worker in the metropolitan areas of Brazil in recent years. Data from Monthly Employment Research, from 2002 to 2015, was applied in an age-period-cohort log-linear modeling of the transition and immobility frequencies from employment categories. The conjuncture aspect is the most influential, followed by cohort. This occupation is both shrinking and “getting older” as fewer young women are participating in this labor market while older women take up more space. This is related both to the postponement of retirement and the lowest occupational mobility at a later stage in life. Furthermore, being black/brown is largely influential on insertion and occupational mobility that is shifting across birth cohorts and decreasing overtime, even though the difference in probability for black/brown and white women being domestic workers remains constant. Moreover, domestic work is more unstable than other occupations, contradicting the previous notion of an occupational trap that was in fact due to individual characteristics of workers.
DOI: 10.6084/m9.figshare.11313542
title: Little red corner and other symbols: how mathematics was taught in the USSR

description: Abstract This article deals with the presence of the communist ideology in the textbooks of mathematics written by Natalia Sergeeva Popova used in the Soviet Union in the period of 1930-1950, when textbooks were compulsory material in schools. We start from the texts present in the author's Mathematical books for the first years of schooling, trying to recognize the traces of communist ideology in Mathematical statements and images. We investigated the communist ideology terms and used both content analysis as well as discourse analysis as a research methodology, concluding that the way Mathematics was presented in these books constituted the channel of delivering the dominant ideology in the Soviet Union in the period under study.
DOI: 10.6084/m9.figshare.11313545
title: Effect of endoparasites occurrence in sows from intensive production system

description: Abstract The goal of this study was to assess the effect of farm size (FS) and farrowing order (FO) on the occurrence of endoparasites eggs in commercial sows housed in maternity and gestation areas during the period from May to July 2014. Forty-three piglet production units were classified by FS: small (100 to 250 sows), medium (251 to 510 sows), large (511 to 1,000 sows) and very large (more than 1,000 sows). Sows were classified by FO: up to two, three to five or more than five parturitions. Faecal samples were processed using the simple flotation technique in a hypersaturated salt solution (30-35% NaCl). The results revealed that the overall prevalence of gastrointestinal endoparasites obtained in this study was 12.47%, in that 4.64% were positive for Ascaris suum, 0.56% for Trichuris suis and 8.27% for coccidia oocysts. The prevalence of endoparasites obtained for small and medium size farm, and for large and very large farm was 34.58% and 15.52%, respectively. In conclusion, the study shows that more than half of the farms were positive for A. suum and coccidia oocysts, but mainly for younger females. In general, sows with up to two parturitions and small farms showed a higher endoparasites percentage.
DOI: 10.6084/m9.figshare.11313536
title: Disruptive coloration and habitat use by seahorses

description: ABSTRACT Predation avoidance is a primary factor influencing survival. Therefore, any trait that affects the risk of predation, such as camouflage, is expected to be under selection pressure. Background matching (homochromy) limits habitat use, especially if the habitat is heterogeneous. Another camouflage mechanism is disruptive coloration, which reduces the probability of detection by masking the prey’s body contours. Here we evaluated if disruptive coloration in the longsnout seahorse, Hippocampus reidi, allows habitat use diversification. We analyzed 82 photographs of animals, comparing animal and background color, and registering anchorage substrate (holdfast). We tested whether the presence (disruptive coloration) or absence of bands (plain coloration) predicted occupation of backgrounds of different colors. We also calculated the connectance between seahorse morph and background color or holdfast, as well as whether color morph differed in their preferences for holdfast. Animals with disruptive coloration were more likely to be found in environments with colors different from their own. Furthermore, animals with disruptive coloration occupied more diversified habitats, but as many holdfasts as plain colored animals. Therefore, animals with disruptive coloration were less selective in habitat use than those lacking disruptive color patterns, which agrees with the disruptive coloration hypothesis.
DOI: 10.6084/m9.figshare.11313539
title: Molecular detection of Bartonella, Ehrlichia and Mycoplasma in feral dogs of El Pedregal de San Angel Ecological Reserve in Mexico City

description: Abstract Free-ranging and feral dogs represent a group of unattended companion animals. They impact wild animal populations by predating native species, displacing predators and introducing exotic pathogens. The aim of this work was to describe the molecular occurrence of Rickettsia, Ehrlichia, Anaplasma, Mycoplasma and Bartonella in feral dogs. The study was carried out in the last relict of a protected area in Mexico City. Blood clots samples from 19 dogs were obtained and analyzed for detection of specific fragments of the 16S-rRNA gene for Anaplasma, Ehrlichia and Mycoplasma and citrate synthase (gltA) for Bartonella and Rickettsia. Our results showed that DNA from three bacteria species (Bartonella vinsonii subsp. berkhoffii, Ehrlichia canis and Mycoplasma haemocanis) was present with frequencies ranging from 5.3 to 15.8%. This is the first record of B. vinsonii subsp. berkhoffii and M. haemocanis in dogs from México, and also the first finding of Ehrlichia canis in Mexico City. It is important to perform surveillance of feral dog populations in order to identify the impact of these pathogens on wild animal populations and Public Health in order to establish prevention and protection programs.
DOI: 10.6084/m9.figshare.11313536.v1
title: Disruptive coloration and habitat use by seahorses

description: ABSTRACT Predation avoidance is a primary factor influencing survival. Therefore, any trait that affects the risk of predation, such as camouflage, is expected to be under selection pressure. Background matching (homochromy) limits habitat use, especially if the habitat is heterogeneous. Another camouflage mechanism is disruptive coloration, which reduces the probability of detection by masking the prey’s body contours. Here we evaluated if disruptive coloration in the longsnout seahorse, Hippocampus reidi, allows habitat use diversification. We analyzed 82 photographs of animals, comparing animal and background color, and registering anchorage substrate (holdfast). We tested whether the presence (disruptive coloration) or absence of bands (plain coloration) predicted occupation of backgrounds of different colors. We also calculated the connectance between seahorse morph and background color or holdfast, as well as whether color morph differed in their preferences for holdfast. Animals with disruptive coloration were more likely to be found in environments with colors different from their own. Furthermore, animals with disruptive coloration occupied more diversified habitats, but as many holdfasts as plain colored animals. Therefore, animals with disruptive coloration were less selective in habitat use than those lacking disruptive color patterns, which agrees with the disruptive coloration hypothesis.
DOI: 10.6084/m9.figshare.11313539.v1
title: Molecular detection of Bartonella, Ehrlichia and Mycoplasma in feral dogs of El Pedregal de San Angel Ecological Reserve in Mexico City

description: Abstract Free-ranging and feral dogs represent a group of unattended companion animals. They impact wild animal populations by predating native species, displacing predators and introducing exotic pathogens. The aim of this work was to describe the molecular occurrence of Rickettsia, Ehrlichia, Anaplasma, Mycoplasma and Bartonella in feral dogs. The study was carried out in the last relict of a protected area in Mexico City. Blood clots samples from 19 dogs were obtained and analyzed for detection of specific fragments of the 16S-rRNA gene for Anaplasma, Ehrlichia and Mycoplasma and citrate synthase (gltA) for Bartonella and Rickettsia. Our results showed that DNA from three bacteria species (Bartonella vinsonii subsp. berkhoffii, Ehrlichia canis and Mycoplasma haemocanis) was present with frequencies ranging from 5.3 to 15.8%. This is the first record of B. vinsonii subsp. berkhoffii and M. haemocanis in dogs from México, and also the first finding of Ehrlichia canis in Mexico City. It is important to perform surveillance of feral dog populations in order to identify the impact of these pathogens on wild animal populations and Public Health in order to establish prevention and protection programs.
DOI: 10.6084/m9.figshare.11313542.v1
title: Little red corner and other symbols: how mathematics was taught in the USSR

description: Abstract This article deals with the presence of the communist ideology in the textbooks of mathematics written by Natalia Sergeeva Popova used in the Soviet Union in the period of 1930-1950, when textbooks were compulsory material in schools. We start from the texts present in the author's Mathematical books for the first years of schooling, trying to recognize the traces of communist ideology in Mathematical statements and images. We investigated the communist ideology terms and used both content analysis as well as discourse analysis as a research methodology, concluding that the way Mathematics was presented in these books constituted the channel of delivering the dominant ideology in the Soviet Union in the period under study.
DOI: 10.6084/m9.figshare.11313533
title: Seasonal and longitudinal variation in fish assemblage structure along an unregulated stretch of the Middle Uruguay River

description: ABSTRACT Diversity patterns and their causes remain important questions, especially for ecosystems that preserve natural conditions. This is the case of fish diversity in large Neotropical rivers. In this context, we investigated fish diversity patterns along an extensive unregulated river section (ca. 450 km) in the Middle Uruguay River Basin. Sampling was conducted seasonally between May 2017 and March 2018, at six sites (patches) with contrasting environmental conditions. We collected 3,008 individuals belonging to 90 species. Nine were migratory, which summed relevant biomass in local assemblages (20 to 60%). We observed spatial variation in assemblage structure, but weak seasonal effects. Overall, biomass was similar among sites, but richness tended to increase downstream. Migratory fishes showed opposed trends, with higher richness and biomass upstream, particularly catfishes (Siluriformes). Ordination analyses separated sites in three groups based on variations in composition and abundance, and revealed associations between these groups and specific hydro-geomorphic conditions (i.e., flow, depth, channel width and the presence of riparian vegetation). Our study revealed that fish diversity distributes heterogeneously along the main channel, where hydro-geomorphic patches select for distinct assemblages along riverine gradients.
DOI: 10.6084/m9.figshare.11313533.v1
title: Seasonal and longitudinal variation in fish assemblage structure along an unregulated stretch of the Middle Uruguay River

description: ABSTRACT Diversity patterns and their causes remain important questions, especially for ecosystems that preserve natural conditions. This is the case of fish diversity in large Neotropical rivers. In this context, we investigated fish diversity patterns along an extensive unregulated river section (ca. 450 km) in the Middle Uruguay River Basin. Sampling was conducted seasonally between May 2017 and March 2018, at six sites (patches) with contrasting environmental conditions. We collected 3,008 individuals belonging to 90 species. Nine were migratory, which summed relevant biomass in local assemblages (20 to 60%). We observed spatial variation in assemblage structure, but weak seasonal effects. Overall, biomass was similar among sites, but richness tended to increase downstream. Migratory fishes showed opposed trends, with higher richness and biomass upstream, particularly catfishes (Siluriformes). Ordination analyses separated sites in three groups based on variations in composition and abundance, and revealed associations between these groups and specific hydro-geomorphic conditions (i.e., flow, depth, channel width and the presence of riparian vegetation). Our study revealed that fish diversity distributes heterogeneously along the main channel, where hydro-geomorphic patches select for distinct assemblages along riverine gradients.