cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.ar6mhs
title: Occurrence Download

description: A dataset containing 3 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Leymus aristiglumis L.B.Cai"
 ]
}

 The dataset includes 3 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0048996-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.34816/efa.archives.362427
title: Philippes-L4459-053-Forum, partie nord, bloc en marbre

description: Référence : L4459-053<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.34816/efa.archives.362426
title: Philippes-L4459-049-Forum, partie nord, bloc en marbre

description: Référence : L4459-049<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.34816/efa.archives.362425
title: Philippes-L4459-045-Forum, partie nord, bloc en marbre

description: Référence : L4459-045<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.34816/efa.archives.362424
title: Philippes-L4459-043-Forum, partie nord, bloc en marbre

description: Référence : L4459-043<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.34816/efa.archives.362423
title: Philippes-L4459-041-Forum, partie nord, bloc en marbre

description: Référence : L4459-041<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.15468/dl.yjjazd
title: Occurrence Download

description: A dataset containing 1524 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Luzula kjellmaniana Miyabe & Kudô"
 ]
}

 The dataset includes 1524 records from 48 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0048997-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.34816/efa.archives.362422
title: Philippes-L4459-039-Forum, partie nord, bloc en marbre

description: Référence : L4459-039<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.34816/efa.archives.362421
title: Philippes-L4459-037-Forum, partie nord, bloc en marbre

description: Référence : L4459-037<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.15468/dl.b9em2y
title: Occurrence Download

description: A dataset containing 80 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Macaranga strigosa Pax & K.Hoffm."
 ]
}

 The dataset includes 80 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0048998-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.34816/efa.archives.362420
title: Philippes-L4459-035-Forum, partie nord, bloc en marbre

description: Référence : L4459-035<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.34816/efa.archives.362419
title: Philippes-L4459-033-Forum, partie nord, bloc en marbre

description: Référence : L4459-033<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.34816/efa.archives.362418
title: Philippes-L4459-031-Forum, partie nord, bloc en marbre

description: Référence : L4459-031<br />Publication(s) : Inédit<br />Domaine : Architecture<br />
DOI: 10.15468/dl.uwg292
title: Occurrence Download

description: A dataset containing 71 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Maesa nuda Hutch. & Dalziel"
 ]
}

 The dataset includes 71 records from 14 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0048999-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.6084/m9.figshare.19945267
title: AUTOMATIC TITROMETRIC METHOD IN FLOW-BATCH CONTROLLED BY AN ARDUINO OPEN SOURCE HARDWARE

description: This work describes the development of an automatic titrometric method in flow-batch with potentiometric detection using alternative and easily accessible materials. Arduino board and its modules, solenoid valves to control the flow rate, peristaltic pump to propel and suction fluids and tubes of inert material to connect the different parts of the Flow-Batch Analyser (FBA) were used. The use of solenoid valves controlled by microcontrollers proved to be efficient for controlling the flow in FBA systems, the correlations of their flow rates as a function of time showed good linearity with correlation coefficients (r) 0.9994 and 0.9997 for the valve 1 and valve 2, respectively, allowing correct addition of pre-established volumes. Accuracy was verified by comparing the results of the proposed method with the classic potentiometric titration with statistically evaluated by Student’s t-test in NaOH with HCl and vinegar with NaOH titrations. Results confirmed the efficiency to use Arduino board and its modules and automatic titrometric method in flow-batch developed in this work allow the implementation of practical disciplines, such as potentiometric titration and flow analysis system in undergraduate courses, making these instruments more accessible, especially for the chemistry students.
DOI: 10.6084/m9.figshare.19945267.v1
title: AUTOMATIC TITROMETRIC METHOD IN FLOW-BATCH CONTROLLED BY AN ARDUINO OPEN SOURCE HARDWARE

description: This work describes the development of an automatic titrometric method in flow-batch with potentiometric detection using alternative and easily accessible materials. Arduino board and its modules, solenoid valves to control the flow rate, peristaltic pump to propel and suction fluids and tubes of inert material to connect the different parts of the Flow-Batch Analyser (FBA) were used. The use of solenoid valves controlled by microcontrollers proved to be efficient for controlling the flow in FBA systems, the correlations of their flow rates as a function of time showed good linearity with correlation coefficients (r) 0.9994 and 0.9997 for the valve 1 and valve 2, respectively, allowing correct addition of pre-established volumes. Accuracy was verified by comparing the results of the proposed method with the classic potentiometric titration with statistically evaluated by Student’s t-test in NaOH with HCl and vinegar with NaOH titrations. Results confirmed the efficiency to use Arduino board and its modules and automatic titrometric method in flow-batch developed in this work allow the implementation of practical disciplines, such as potentiometric titration and flow analysis system in undergraduate courses, making these instruments more accessible, especially for the chemistry students.
DOI: 10.6084/m9.figshare.19945270.v1
title: CONSTRUCTION OF A LOW-COST POLARIMETER FOR EDUCATIONAL PURPOSES

description: This paper describes the construction of a polarimeter for the identification of chemical substances. The device was built with low-cost materials, measures the phenomenon of optical activity and has educational applicability. The measurement of optical activity is achieved through the measurement of the resulting polarized radiation in a photodiode connected to a voltmeter after passing through polarizing and analyzing filters.
DOI: 10.6084/m9.figshare.19945270
title: CONSTRUCTION OF A LOW-COST POLARIMETER FOR EDUCATIONAL PURPOSES

description: This paper describes the construction of a polarimeter for the identification of chemical substances. The device was built with low-cost materials, measures the phenomenon of optical activity and has educational applicability. The measurement of optical activity is achieved through the measurement of the resulting polarized radiation in a photodiode connected to a voltmeter after passing through polarizing and analyzing filters.
DOI: 10.6084/m9.figshare.19945272
title: ORBITALS IN GENERAL CHEMISTRY, PART II: MATHEMATICAL REALITIES

description: In Part II of a three-part series, we discuss two factors absent from textbooks of general chemistry that are important in a discussion of teaching orbitals. First, atomic orbitals are shown systematically to comprise algebraic formulae in coordinates of not one but four sets (spherical polar, paraboloidal, ellipsoidal, spheroconical coordinates). Each formula has its corresponding shape as a surface of constant amplitude; some visual examples are provided. Second, the argument that molecular structure is incompatible with quantum mechanics is presented. Despite the utility of orbitals as mathematical functions in various calculations, they are intrinsically complicated for the traditional purpose of qualitative explanation of molecular structure.
DOI: 10.6084/m9.figshare.19945272.v1
title: ORBITALS IN GENERAL CHEMISTRY, PART II: MATHEMATICAL REALITIES

description: In Part II of a three-part series, we discuss two factors absent from textbooks of general chemistry that are important in a discussion of teaching orbitals. First, atomic orbitals are shown systematically to comprise algebraic formulae in coordinates of not one but four sets (spherical polar, paraboloidal, ellipsoidal, spheroconical coordinates). Each formula has its corresponding shape as a surface of constant amplitude; some visual examples are provided. Second, the argument that molecular structure is incompatible with quantum mechanics is presented. Despite the utility of orbitals as mathematical functions in various calculations, they are intrinsically complicated for the traditional purpose of qualitative explanation of molecular structure.
DOI: 10.6084/m9.figshare.19945273
title: Synthesis of symmetric and asymmetric 1,3-diaryltriazenes in vinegar

description: An adaptation on the classical synthesis methodology for 1,3-diaryltriazenes for a 4-hour experimental class has been proposed with green chemistry principles in mind by using commercial vinegar as a source for diazotization with NaNO2 and keeping the reaction workup to simple vacuum filtration. Several anilines with different substituent groups were used to evaluate how they affect the synthesis based on their electron-donating/withdrawing characteristics. The decomposition of the triazenes in acidic media was also monitored via TLC. On the overall, the reactions came up with medium to high yield and high purity. Experimental procedure, reaction mechanism and other potential discussions such as green chemistry principles and effects of electron-donating/withdrawing groups are suitable for undergraduate students.
DOI: 10.6084/m9.figshare.19945273.v1
title: Synthesis of symmetric and asymmetric 1,3-diaryltriazenes in vinegar

description: An adaptation on the classical synthesis methodology for 1,3-diaryltriazenes for a 4-hour experimental class has been proposed with green chemistry principles in mind by using commercial vinegar as a source for diazotization with NaNO2 and keeping the reaction workup to simple vacuum filtration. Several anilines with different substituent groups were used to evaluate how they affect the synthesis based on their electron-donating/withdrawing characteristics. The decomposition of the triazenes in acidic media was also monitored via TLC. On the overall, the reactions came up with medium to high yield and high purity. Experimental procedure, reaction mechanism and other potential discussions such as green chemistry principles and effects of electron-donating/withdrawing groups are suitable for undergraduate students.
DOI: 10.6084/m9.figshare.19945275
title: Technology scale up: process development from the laboratory to pilot scale connected to market (part 1)

description: In this article, it is described the main aspects to be considered during the process of scaling up hard sciences technologies developed in the Science and Technology Institutes aiming at industrial application. Based on the experience of our group in scaling up, pre-acceleration, and acceleration of different technologies, a methodology was developed and divided into four main stages: Step 1, which involves basic research, Step 2 with a focus on product development, and Step 3 with a focus on process development, all on the laboratory scale and the last one, Step 4 focused on pilot plant development. The most important aspect of this article is to show that many critical questions can be answered even in the laboratory phase. In this way, the risks of Step 4 are minimized. Step 4 is a complicated, lengthy, and expensive process of construction and operation of a pilot plant. Aspects such as proof of concept, technical and economic feasibility studies, minimum viable product, capital expenditures, and operating expenses of pilot plants are approached in a simplified way to serve as a basis for researchers who wants to know the long path to be followed by technology before reaching the industry, consequently the market.
DOI: 10.6084/m9.figshare.19945275.v1
title: Technology scale up: process development from the laboratory to pilot scale connected to market (part 1)

description: In this article, it is described the main aspects to be considered during the process of scaling up hard sciences technologies developed in the Science and Technology Institutes aiming at industrial application. Based on the experience of our group in scaling up, pre-acceleration, and acceleration of different technologies, a methodology was developed and divided into four main stages: Step 1, which involves basic research, Step 2 with a focus on product development, and Step 3 with a focus on process development, all on the laboratory scale and the last one, Step 4 focused on pilot plant development. The most important aspect of this article is to show that many critical questions can be answered even in the laboratory phase. In this way, the risks of Step 4 are minimized. Step 4 is a complicated, lengthy, and expensive process of construction and operation of a pilot plant. Aspects such as proof of concept, technical and economic feasibility studies, minimum viable product, capital expenditures, and operating expenses of pilot plants are approached in a simplified way to serve as a basis for researchers who wants to know the long path to be followed by technology before reaching the industry, consequently the market.
DOI: 10.6084/m9.figshare.19945279
title: ENVIRONMENTAL PARAMETERS AND RELATIONSHIPS WITH COVID-19 CASES IN CENTRAL SOUTH AMERICA

description: This work aims to evaluate the possible relations between the confirmed daily cases of COVID-19 and the environmental parameters for the Cuiabá-Várzea Grande conurbation in the state of Mato Grosso, Brazil. The data sets used to cover the rainy-dry periods, from January to December 2020, were achieved from a database of government institutions, and processed through the Spearman correlation test. Our results showed that atmospheric pressure and fire radiative power has a significant positive correlation, suggesting that these parameters favor the transmission of COVID-19. On the other hand, the relative humidity of the air and the total column of water vapor showed a significant negative correlation with the number of confirmed daily cases of COVID-19, which indicates that the water vapor present in the atmosphere acts in the regulation of virus transmission. Thus, taking into account the results obtained, there is a need for collaborative policies and measures among the three spheres of executive power in Brazil, to act in the surveillance of fire cases, which can favor the transmission of COVID-19. In addition, prevention and protection measures aimed at reducing the spread of coronavirus continue to be indispensable.
DOI: 10.6084/m9.figshare.19945279.v1
title: ENVIRONMENTAL PARAMETERS AND RELATIONSHIPS WITH COVID-19 CASES IN CENTRAL SOUTH AMERICA

description: This work aims to evaluate the possible relations between the confirmed daily cases of COVID-19 and the environmental parameters for the Cuiabá-Várzea Grande conurbation in the state of Mato Grosso, Brazil. The data sets used to cover the rainy-dry periods, from January to December 2020, were achieved from a database of government institutions, and processed through the Spearman correlation test. Our results showed that atmospheric pressure and fire radiative power has a significant positive correlation, suggesting that these parameters favor the transmission of COVID-19. On the other hand, the relative humidity of the air and the total column of water vapor showed a significant negative correlation with the number of confirmed daily cases of COVID-19, which indicates that the water vapor present in the atmosphere acts in the regulation of virus transmission. Thus, taking into account the results obtained, there is a need for collaborative policies and measures among the three spheres of executive power in Brazil, to act in the surveillance of fire cases, which can favor the transmission of COVID-19. In addition, prevention and protection measures aimed at reducing the spread of coronavirus continue to be indispensable.
DOI: 10.6084/m9.figshare.19945280.v1
title: FEASIBILITY OF H2 PRODUCTION BY ACID CORROSION USING H2SIF6 AND WASTE FE SOURCES

description: This study investigated the feasibility of H2 production by acid corrosion, employing a by-product from the fertilizer industry (Hexafluorsilic acid - H2SiF6) and waste iron sources. Different masses of metal from three different sources: iron powder (waste from metal workshops), steel wool and rebar (construction waste), were reacted with various proportions of H2SiF6 with HCl. The influence of the variables was evaluated by factorial design, verifying greater production of H2 for materials with higher contact areas. The lowest production was observed for construction industry waste (rebar) probably due to the presence of protective films and lower contact area. The gas produced was analyzed by gas chromatography and was found to consist only of H2 (up to 99%) and air. The results indicate a promising application of H2SiF6, which is generated in large quantities during phosphate fertilizer production and has few commercial applications. The method proposed is promising, it does not emit toxic or polluting gases, contributing to the sustainable generation of H2.
DOI: 10.6084/m9.figshare.19945280
title: FEASIBILITY OF H2 PRODUCTION BY ACID CORROSION USING H2SIF6 AND WASTE FE SOURCES

description: This study investigated the feasibility of H2 production by acid corrosion, employing a by-product from the fertilizer industry (Hexafluorsilic acid - H2SiF6) and waste iron sources. Different masses of metal from three different sources: iron powder (waste from metal workshops), steel wool and rebar (construction waste), were reacted with various proportions of H2SiF6 with HCl. The influence of the variables was evaluated by factorial design, verifying greater production of H2 for materials with higher contact areas. The lowest production was observed for construction industry waste (rebar) probably due to the presence of protective films and lower contact area. The gas produced was analyzed by gas chromatography and was found to consist only of H2 (up to 99%) and air. The results indicate a promising application of H2SiF6, which is generated in large quantities during phosphate fertilizer production and has few commercial applications. The method proposed is promising, it does not emit toxic or polluting gases, contributing to the sustainable generation of H2.
DOI: 10.6084/m9.figshare.19945283.v1
title: SPACE-TEMPORAL BIOGEOCHEMISTRY OF THE LITTER IN A NATURAL FOREST ENVIRONMENT IN THE CENTRAL AMAZON

description: This research was aimed to evaluate the concentration of 15 chemical elements as a reference base for the quality of the litter in a forest in the central region of the Amazon. The sampling of the litter was performed monthly in two topographic positions for one year. For the quantification of the elements, digestion by nitroperchloric solution and reading by ICP OES were performed. The mean of macronutrient contents in the litter in decreasing order were Ca&gt;K&gt;Mg&gt;Na. For micronutrients, the order was Al&gt;Mn&gt;Fe&gt;Sr&gt;Zn&gt;Cu&gt;Ba&gt;Cr&gt;Ni&gt;Co&gt;Cd for the Plateau and Al&gt;Mn&gt;Fe Sr&gt;Zn&gt;Cu&gt;Ba&gt;Cr&gt;Ni&gt;Cd&gt;Co for the Baixio. Among the fractions, calcium had its highest concentration in the woody material, potassium in the reproductive material, while magnesium, sodium, and aluminum showed higher concentrations in the leaf fraction. Also, it was observed that the return of the elements to the soil by litter was greater in the dry period of the region, due to the greater fall in plant material. Calcium differed significantly within the same area, obtaining the highest concentrations compared to the other elements, while aluminum and zinc differed significantly between the areas studied, with a higher return for both elements on the Plateau.
DOI: 10.6084/m9.figshare.19945283
title: SPACE-TEMPORAL BIOGEOCHEMISTRY OF THE LITTER IN A NATURAL FOREST ENVIRONMENT IN THE CENTRAL AMAZON

description: This research was aimed to evaluate the concentration of 15 chemical elements as a reference base for the quality of the litter in a forest in the central region of the Amazon. The sampling of the litter was performed monthly in two topographic positions for one year. For the quantification of the elements, digestion by nitroperchloric solution and reading by ICP OES were performed. The mean of macronutrient contents in the litter in decreasing order were Ca&gt;K&gt;Mg&gt;Na. For micronutrients, the order was Al&gt;Mn&gt;Fe&gt;Sr&gt;Zn&gt;Cu&gt;Ba&gt;Cr&gt;Ni&gt;Co&gt;Cd for the Plateau and Al&gt;Mn&gt;Fe Sr&gt;Zn&gt;Cu&gt;Ba&gt;Cr&gt;Ni&gt;Cd&gt;Co for the Baixio. Among the fractions, calcium had its highest concentration in the woody material, potassium in the reproductive material, while magnesium, sodium, and aluminum showed higher concentrations in the leaf fraction. Also, it was observed that the return of the elements to the soil by litter was greater in the dry period of the region, due to the greater fall in plant material. Calcium differed significantly within the same area, obtaining the highest concentrations compared to the other elements, while aluminum and zinc differed significantly between the areas studied, with a higher return for both elements on the Plateau.