cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.21946259
title: Microarray and bioinformatic analysis of conventional ameloblastoma: an observational analysis

description: Abstract Ameloblastoma is a highly aggressive odontogenic tumor, and its pathogenesis is associated with many participating genes. Objective We aimed to identify and validate new critical genes of conventional ameloblastoma using microarray and bioinformatics analysis. Methodology Gene expression microarray and bioinformatic analysis were performed using CHIP H10KA and DAVID software for enrichment. Protein-protein interactions (PPI) were visualized using STRING-Cytoscape with MCODE plugin, followed by Kaplan-Meier and GEPIA analyses that were used for the candidate’s postulation. RT-qPCR and IHC assays were performed to validate the bioinformatic approach. Results 376 upregulated genes were identified. PPI analysis revealed 14 genes that were validated by Kaplan-Meier and GEPIA resulting in PDGFA and IL2RA as candidate genes. The RT-qPCR analysis confirmed their intense expression. Immunohistochemistry analysis showed that PDGFA expression is parenchyma located. Conclusion With bioinformatics methods, we can identify upregulated genes in conventional ameloblastoma, and with RT-qPCR and immunoexpression analysis validate that PDGFA could be a more specific and localized therapeutic target.
DOI: 10.6084/m9.figshare.21946259.v1
title: Microarray and bioinformatic analysis of conventional ameloblastoma: an observational analysis

description: Abstract Ameloblastoma is a highly aggressive odontogenic tumor, and its pathogenesis is associated with many participating genes. Objective We aimed to identify and validate new critical genes of conventional ameloblastoma using microarray and bioinformatics analysis. Methodology Gene expression microarray and bioinformatic analysis were performed using CHIP H10KA and DAVID software for enrichment. Protein-protein interactions (PPI) were visualized using STRING-Cytoscape with MCODE plugin, followed by Kaplan-Meier and GEPIA analyses that were used for the candidate’s postulation. RT-qPCR and IHC assays were performed to validate the bioinformatic approach. Results 376 upregulated genes were identified. PPI analysis revealed 14 genes that were validated by Kaplan-Meier and GEPIA resulting in PDGFA and IL2RA as candidate genes. The RT-qPCR analysis confirmed their intense expression. Immunohistochemistry analysis showed that PDGFA expression is parenchyma located. Conclusion With bioinformatics methods, we can identify upregulated genes in conventional ameloblastoma, and with RT-qPCR and immunoexpression analysis validate that PDGFA could be a more specific and localized therapeutic target.
DOI: 10.6084/m9.figshare.21946261
title: Identifying olive oil fraud and adulteration using machine learning algorithms

description: As olive oil (OO) is more expensive than other vegetable oils, it is usually adulterated by blending it with more economic edible oils such as cottonseed oil (CSO), canola oil (CO), and soybean oil (SO). This research aimed to determine the fatty acid compositions obtained as a result of blending different proportions of CSO, CO and SO with OO using a gas chromatograph and to reveal OO adulteration by evaluating the obtained data with different machine learning algorithms. The assessment of the OO consisted of two stages. The first step was extraction of the feature vector, while second step was the classification of feature vectors with regard to the data and computing the regression values. Features were extracted using the Relief method, classified with the Support Vector Machine (SVM) and the k-Nearest Neighbor (k-NN) and Decision Tree (DT) algorithms, and the neural network algorithm was used for regression. The highest accuracy values for classification were calculated as 0.946, 0.964 and 0.982 for OO-CO, OO-SO, and OO-CSO mixtures, using the SVM method, respectively. The errors in the regression analysis were computed as 0.005, 0.005 and 0.002 respectively using the neural network algorithm.
DOI: 10.6084/m9.figshare.21946262
title: CIENTOMETRIC PROFILE OF THE CHEMOMETRICS IN BRAZIL

description: The interest of researchers in understanding the stage of development of specific areas of knowledge is a way to understand their scientific maturity and their capacity for consolidation. This “popularization” of the knowledge of researchers working in a specific area of knowledge also allows a greater ability to recognize where science is produced and which actors participate in this effort from a series of evaluation parameters, indicative of the productivity of researchers through the number of articles published and the consistency of production and its relationship with the impact of this in the scientific community through citations of articles. Chemometrics, a science that relates measurements obtained in chemical systems or processes through the application of statistical and mathematical methods, an area created 50 years ago, still does not have a study evaluating the evolution of the area in qualitative and quantitative terms. In this sense, this article aims to present data from the profile of Brazilian scientific production in Chemometrics, as well as the training of human resources, in its scientometric aspects to allow an understanding of the dynamics and contemporary reality of the area. In terms of national scientific production is growing proportionally faster than the rest of the world, placing Brazil among the leading producers of knowledge in the area. Researchers in Chemometrics working in Brazil not only publish a significant number of articles, but these publications have a large number of citations, in addition to the training of human resources spread throughout Brazil, distributed among most graduate courses in chemistry, but not restricted to this area. Finally, the area of Chemometrics, which is about fifty years old, is mature, with numbers of publications and training of human resources, but it is noted that a plateau has not been reached in these two numbers, because the critical mass of researchers working in the area is still increasing.
DOI: 10.6084/m9.figshare.21946262.v1
title: CIENTOMETRIC PROFILE OF THE CHEMOMETRICS IN BRAZIL

description: The interest of researchers in understanding the stage of development of specific areas of knowledge is a way to understand their scientific maturity and their capacity for consolidation. This “popularization” of the knowledge of researchers working in a specific area of knowledge also allows a greater ability to recognize where science is produced and which actors participate in this effort from a series of evaluation parameters, indicative of the productivity of researchers through the number of articles published and the consistency of production and its relationship with the impact of this in the scientific community through citations of articles. Chemometrics, a science that relates measurements obtained in chemical systems or processes through the application of statistical and mathematical methods, an area created 50 years ago, still does not have a study evaluating the evolution of the area in qualitative and quantitative terms. In this sense, this article aims to present data from the profile of Brazilian scientific production in Chemometrics, as well as the training of human resources, in its scientometric aspects to allow an understanding of the dynamics and contemporary reality of the area. In terms of national scientific production is growing proportionally faster than the rest of the world, placing Brazil among the leading producers of knowledge in the area. Researchers in Chemometrics working in Brazil not only publish a significant number of articles, but these publications have a large number of citations, in addition to the training of human resources spread throughout Brazil, distributed among most graduate courses in chemistry, but not restricted to this area. Finally, the area of Chemometrics, which is about fifty years old, is mature, with numbers of publications and training of human resources, but it is noted that a plateau has not been reached in these two numbers, because the critical mass of researchers working in the area is still increasing.
DOI: 10.6084/m9.figshare.21946264
title: ANALYTICAL CHEMISTRY APPLIED TO STUDIES OF RUPESTRES PIGMENTS: A REVIEW

description: Instrumental advances have been employed in the study of archeological remains such as prehistoric rupestrians paintings with the objective of chemically characterizing them in order to reconstruct the cultural technologies of a prehistoric human group and/or to support conservation science studies. The analytical techniques most commonly used in archaeometric research are non-destructive or semi-destructive and preferably portable to preserve the integrity of the rupestrians paintings. They include X-ray Fluorescence Spectrometry (XRF), Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy (SEM/EDS), Raman spectroscopy, X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Laser-induced Breakdown Spectroscopy (LIBS), and the many techniques with emerging applications such as Mössbauer Spectroscopy, X-ray Absorption Near Edge Structures (XANES), Particle Induced X-ray Emission Spectrometry (PIXE) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA ICP-MS). Therefore, this paper presents a review of the literature on the development of chemical strategies employed in the study of rock art, focusing mainly on the critical evaluation of analytical techniques used, limitations, challenges and the perspectives within this area of study.
DOI: 10.6084/m9.figshare.21946264.v1
title: ANALYTICAL CHEMISTRY APPLIED TO STUDIES OF RUPESTRES PIGMENTS: A REVIEW

description: Instrumental advances have been employed in the study of archeological remains such as prehistoric rupestrians paintings with the objective of chemically characterizing them in order to reconstruct the cultural technologies of a prehistoric human group and/or to support conservation science studies. The analytical techniques most commonly used in archaeometric research are non-destructive or semi-destructive and preferably portable to preserve the integrity of the rupestrians paintings. They include X-ray Fluorescence Spectrometry (XRF), Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy (SEM/EDS), Raman spectroscopy, X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Laser-induced Breakdown Spectroscopy (LIBS), and the many techniques with emerging applications such as Mössbauer Spectroscopy, X-ray Absorption Near Edge Structures (XANES), Particle Induced X-ray Emission Spectrometry (PIXE) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA ICP-MS). Therefore, this paper presents a review of the literature on the development of chemical strategies employed in the study of rock art, focusing mainly on the critical evaluation of analytical techniques used, limitations, challenges and the perspectives within this area of study.
DOI: 10.14459/2023mp1695278
title: Thermographic Cooling Rate Measurements and HV 1 Hardness Measurements of 316L Tower-Like Specimens manufactured by Powder Bed Fusion of Metals Using a Laser Beam

description: The dataset consists of two folders and three individual files. The two folders contain the raw thermographic data for several layers of two build jobs. Each subfolder of the build jobs holds a video, the raw data, and a metadata file of one layer. The three individual files contain the results of HV 1 hardness measurements of the manufactured specimens and the evaluation results of the thermographic data.
DOI: 10.6084/m9.figshare.21946265
title: An alternative energy generation from charcoal produced from Brazilian pine (Araucaria angustifolia (Bert.) O. Ktze) seed residues

description: The perspective is that the energy demand will grow in the coming decades worldwide. The search for renewable energy sources is urgent and necessary. Residual biomass may be a promising source of raw material for obtaining bioenergy. Thus, this research sought to evaluate the energetic and physicochemical properties of residues from the seeds of Brazilian pine (Araucaria angustifolia (Bert.) O. Ktze). The chemical analysis included the extractive, holocellulose, and Klason lignin contents. The residues were pyrolyzed according to the final temperature of each process (300 ºC - 550 ºC) and a control treatment. The proximate analysis was performed to determine the moisture content, volatile matter, ash, and fixed carbon. We determined bulk density, the higher heating value, and the net heating value. The determination of the energetic density was also calculated. The residues showed significant values in lignin and extractives. The pyrolysis treatments performed at the final temperature of 350 ºC and 400 ºC presented a higher value of gravimetric charcoal yield. The charcoal obtained at 500 ºC and 550 ºC had better energetic properties. The Brazilian pine seed residues under the pyrolysis process presented desirable energy characteristics, showing its potential for use as a raw material in bioenergy generation.
DOI: 10.6084/m9.figshare.21946265.v1
title: An alternative energy generation from charcoal produced from Brazilian pine (Araucaria angustifolia (Bert.) O. Ktze) seed residues

description: The perspective is that the energy demand will grow in the coming decades worldwide. The search for renewable energy sources is urgent and necessary. Residual biomass may be a promising source of raw material for obtaining bioenergy. Thus, this research sought to evaluate the energetic and physicochemical properties of residues from the seeds of Brazilian pine (Araucaria angustifolia (Bert.) O. Ktze). The chemical analysis included the extractive, holocellulose, and Klason lignin contents. The residues were pyrolyzed according to the final temperature of each process (300 ºC - 550 ºC) and a control treatment. The proximate analysis was performed to determine the moisture content, volatile matter, ash, and fixed carbon. We determined bulk density, the higher heating value, and the net heating value. The determination of the energetic density was also calculated. The residues showed significant values in lignin and extractives. The pyrolysis treatments performed at the final temperature of 350 ºC and 400 ºC presented a higher value of gravimetric charcoal yield. The charcoal obtained at 500 ºC and 550 ºC had better energetic properties. The Brazilian pine seed residues under the pyrolysis process presented desirable energy characteristics, showing its potential for use as a raw material in bioenergy generation.
DOI: 10.6084/m9.figshare.21946268
title: A new species of the genus Aegidium Westwood (Coleoptera: Scarabaeidae: Orphninae) from Peru

description: ABSTRACT A new species of Aegidium from Peru is described and illustrated. It can be recognized from its congeners by the shape of the parameres and spiculum gastrale, but also by the punctuation of the pronotum and the elytra. The species occurs in the Andean-Amazonian piedmonts from Peru.
DOI: 10.6084/m9.figshare.21946268.v1
title: A new species of the genus Aegidium Westwood (Coleoptera: Scarabaeidae: Orphninae) from Peru

description: ABSTRACT A new species of Aegidium from Peru is described and illustrated. It can be recognized from its congeners by the shape of the parameres and spiculum gastrale, but also by the punctuation of the pronotum and the elytra. The species occurs in the Andean-Amazonian piedmonts from Peru.
DOI: 10.6084/m9.figshare.21946273
title: Identifying conceptions of the covalent bond: an analysis from a systematic review

description: The covalent bond is a classical topic in science education because it is fundamental to a considerable number of other concepts and by its ability to interpret several chemical phenomena. However, the process of learning this concept presents some difficulties discussed here. This article brings together the conceptions related to the covalent bond, identified, and reported from other studies, to find similarities and to organize what is known about the topic in epistemological themes. In this paper, it was conducted a systematic review using 3 databases, reaching more than 200 reports, and classified 253 sentences of misconceptions in 7 epistemological themes. The main contribution of this article is the classification of misconceptions into themes, which enables teachers and researchers to easily identify a topic considering its complexity. This review shows different misconceptions over the same topic, how misinterpretations can appear over all the models and theories related to the covalent bond, heterogeneity of school levels with the same misconception and mixing of theoretical foundations. Finally, we claim that the knowledge of this wide sight can be especially important to further lesson/unity planning, studies, and understanding of how to make a better transition between one topic to another.
DOI: 10.6084/m9.figshare.21946273.v1
title: Identifying conceptions of the covalent bond: an analysis from a systematic review

description: The covalent bond is a classical topic in science education because it is fundamental to a considerable number of other concepts and by its ability to interpret several chemical phenomena. However, the process of learning this concept presents some difficulties discussed here. This article brings together the conceptions related to the covalent bond, identified, and reported from other studies, to find similarities and to organize what is known about the topic in epistemological themes. In this paper, it was conducted a systematic review using 3 databases, reaching more than 200 reports, and classified 253 sentences of misconceptions in 7 epistemological themes. The main contribution of this article is the classification of misconceptions into themes, which enables teachers and researchers to easily identify a topic considering its complexity. This review shows different misconceptions over the same topic, how misinterpretations can appear over all the models and theories related to the covalent bond, heterogeneity of school levels with the same misconception and mixing of theoretical foundations. Finally, we claim that the knowledge of this wide sight can be especially important to further lesson/unity planning, studies, and understanding of how to make a better transition between one topic to another.
DOI: 10.6084/m9.figshare.21946274
title: Transcriptome analysis of the spider Phonotimpus pennimani reveals novel toxin transcripts

description: Abstract Background: Phonotimpus pennimani (Araneae, Phrurolithidae) is a small-sized (3-5 mm) spider endemic to the Tacaná volcano in Chiapas, Mexico, where it is found in soil litter of cloud forests and coffee plantations. Its venom composition has so far not been investigated, partly because it is not a species of medical significance. However, it does have an important impact on the arthropod populations of its natural habitat. Methods: Specimens were collected in Southeastern Mexico (Chiapas) and identified taxonomically by morphological characteristics. A partial sequence from the mitochondrial gene coxI was amplified. Sequencing on the Illumina platform of a transcriptome library constructed from 12 adult specimens revealed 25 toxin or toxin-like genes. Transcripts were validated (RT-qPCR) by assessing the differential expression of the toxin-like PpenTox1 transcript and normalising with housekeeping genes. Results: Analysis of the coxI-gene revealed a similarity to other species of the family Phrurolithidae. Transcriptome analysis also revealed similarity with venom components of species from the families Ctenidae, Lycosidae, and Sicariidae. Expression of the toxin-like PpenTox1 gene was different for each developmental stage (juvenile or adult) and also for both sexes (female or male). Additionally, a partial sequence was obtained for the toxin-like PpenTox1 from DNA. Conclusion: Data from the amplification of the mitochondrial coxI gene confirmed that P. pennimani belongs to the family Phrurolithidae. New genes and transcripts coding for venom components were identified.
DOI: 10.6084/m9.figshare.21946274.v1
title: Transcriptome analysis of the spider Phonotimpus pennimani reveals novel toxin transcripts

description: Abstract Background: Phonotimpus pennimani (Araneae, Phrurolithidae) is a small-sized (3-5 mm) spider endemic to the Tacaná volcano in Chiapas, Mexico, where it is found in soil litter of cloud forests and coffee plantations. Its venom composition has so far not been investigated, partly because it is not a species of medical significance. However, it does have an important impact on the arthropod populations of its natural habitat. Methods: Specimens were collected in Southeastern Mexico (Chiapas) and identified taxonomically by morphological characteristics. A partial sequence from the mitochondrial gene coxI was amplified. Sequencing on the Illumina platform of a transcriptome library constructed from 12 adult specimens revealed 25 toxin or toxin-like genes. Transcripts were validated (RT-qPCR) by assessing the differential expression of the toxin-like PpenTox1 transcript and normalising with housekeeping genes. Results: Analysis of the coxI-gene revealed a similarity to other species of the family Phrurolithidae. Transcriptome analysis also revealed similarity with venom components of species from the families Ctenidae, Lycosidae, and Sicariidae. Expression of the toxin-like PpenTox1 gene was different for each developmental stage (juvenile or adult) and also for both sexes (female or male). Additionally, a partial sequence was obtained for the toxin-like PpenTox1 from DNA. Conclusion: Data from the amplification of the mitochondrial coxI gene confirmed that P. pennimani belongs to the family Phrurolithidae. New genes and transcripts coding for venom components were identified.
DOI: 10.6084/m9.figshare.21946276
title: Diversity of the diterpenes in the leaves of Xylopia laevigata (Annonaceae) and their cytotoxicities

description: The phytochemical investigation of the hexane extract which was obtained from the leaves of Xylopia laevigata (Annonaceae) produced six terpenes. Among these, five diterpenes named abieta-7,13-dien-3-one, ent-7β-acetoxy-16β-hydroxy-kaurane, 4-epi-cupressic acid, powerol, and labdorffianic acid B, and one oxygenated sesquiterpene, spathulenol. This is the first time these isolated diterpenes from X. laevigata have been described. The different structures belong to the abietane, kaurane, and labdane diterpenoids, and are indicative of the chemical diversity found in X. laevigata. Moreover, the diterpene ent-7β-acetoxy-16β-hydroxy-kaurane is reported herein for the first time as a natural product, and 4-epi-cupressic acid, powerol, and labdorffianic acid B are reported for the first time in the Annonaceae family. The structures of the isolated compounds were established by extensive analyses using 1D and 2D NMR spectroscopy in combination with MS. The cytotoxic activities of compounds abieta-7,13-dien-3-one, spathulenol, 4-epi-cupressic acid, and powerol were evaluated against tumor and non-tumor cell lines, in which spathulenol was found to be the most active, mainly against K562 with an IC50 value of 17.20 μmol L-1.