This work plants a method of estimate of harmful in structure by no lineal signals separation, ba... more This work plants a method of estimate of harmful in structure by no lineal signals separation, based in wavelet transform. The obtained results are superior in capacity of harmful estimate for reported in the literature. By system acceleration register and wavelet transform, the proposed method permits to estimate the instant and the amplitude of any structural failing
This paper presents an extensive review of major research carried out in the area of chemical sen... more This paper presents an extensive review of major research carried out in the area of chemical sensors and its application in the control of gases in sensitive environments to pollution. The gases considered in this study as contaminants of reference [1] are: carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3) and sulphur dioxide (SO2), as well as other compounds of impact as CO2, volatile organic compounds (VOCs), hydrocarbons (HC), oxides of nitrogen and sulphur in general (NOX and SOX). The existence of regulations have promoted the development of technology for the monitoring of the conditions in which are released to the environment pollutants to their control by providing essential information for an assertive decision-making. Then developed measuring equipment from contaminants based on di erent types of sensors and systems for monitoring necessary so that they can use in the monitoring and evaluation of the contamination [1]‐[3]. These systems include chemical sensors based on electrochemical and optical, piezoelectric transducers which, unlike the analytical methods, measure permanently and the place which produce atmospheric emissions and pollutants [4]‐[8].
This writing is a tribute to all the Venezuelan scientists who have left us in the prime of their... more This writing is a tribute to all the Venezuelan scientists who have left us in the prime of their lives. Dr. Domingo Maldonado Sánchez has had to leave, leaving behind a large work as academic and scientist. This short note represents just a sample of one who was a dedicated professor, outstanding researcher, and excellent friend.
This paper presents an extensive review of major research carried out in the area of chemical sen... more This paper presents an extensive review of major research carried out in the area of chemical sensors and its application in the control of gases in sensitive environments to pollution. The gases considered in this study as contaminants of reference [1] are: carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3) and sulphur dioxide (SO2), as well as other compounds of impact as CO2, volatile organic compounds (VOCs), hydrocarbons (HC), oxides of nitrogen and sulphur in general (NOX and SOX). The existence of regulations have promoted the development of technology for the monitoring of the conditions in which are released to the environment pollutants to their control by providing essential information for an assertive decision-making. Then developed measuring equipment from contaminants based on di erent types of sensors and systems for monitoring necessary so that they can use in the monitoring and evaluation of the contamination [1]‐[3]. These systems include chemical sensors ba...
... UV ALEYDA MONTAÑEZ1, LISBETH MANGANIELLO1*, NANCY MENDOZA1, CRISTÓBAL VEGA2, RICHARD MORA3 1U... more ... UV ALEYDA MONTAÑEZ1, LISBETH MANGANIELLO1*, NANCY MENDOZA1, CRISTÓBAL VEGA2, RICHARD MORA3 1Universidad ... pintura. Puede movili-zarse al agua subterránea a través del suelo. La IARC ha determinado ...
Leather samples were prepared and characterized as 'in house' matrix standards fo... more Leather samples were prepared and characterized as 'in house' matrix standards for the determination of fat. The Soxhlet standard method was used to establish the reference fat content in every standard sample. Sample homogeneity and stability were examined under specific storing conditions. The materials were subsequently used as matrix standards for the determination of fat in leather samples, using supercritical fluid extraction (SFE) with on-line piezoelectric detection. Real samples were weighed in the extraction SFE thimble, previously loaded with 1 g of diatomaceous earth. A temperature of 45 degrees C and a CO2 fluid density of 0.85 g ml-1 were used for extraction. The linear calibration range thus achieved was 0.001-0.040% m/m total fat (related to the weight of the leather) and the relative standard deviation +/- 3% (n = 11; P = 0.05). The results were compared with those obtained with the Soxhlet method and no significant differences were found.
The efficient editorial management of the manuscripts that are consigned to the scientific journa... more The efficient editorial management of the manuscripts that are consigned to the scientific journals for review considers as a preliminary step the verification of their originality. A previously published writing or with a high percentage of paragraphs taken from other authors without the proper reference or the correct use of the ``\emph{textual citation}'' resource is insupportable, due to the consequences that it entails from the point of view of the integrity of the journal that publishes it, as well as the legal actions to which both the members of the editorial committee and the authors who have incurred the fault are exposed. In order to guarantee the quality of the work carried out in the journal Ciencia en Revolución, this document includes the main aspects of the antiplagic policy being carried out. To begin with, the definition of plagiarism and the importance of its detection are exposed. The most common types are identified below, clarifying the cases in which t...
These notes present a basic overview of the most relevant aspects of the role of scientific journ... more These notes present a basic overview of the most relevant aspects of the role of scientific journals in open science; for the review, the definition of open science established by the European Union forum is examined. The given concept covers many areas of academic society; furthermore, open science is supported by open data, open source, open access, and open review. It has a clear, free, discovered, broad and expeditious methodology; with open sources in software and hardware that allow the entire community greater accessibility. The purpose of open science is the production of public scientific goods through the exchange of results and collaboration. The characteristics that a scientific journal and its repositories should have are carefully analyzed; as well as, the contradictions in society in the face of open science policies are also studied. The advances of open science in Venezuela are also presented. To conclude that the goal of open science is to promote communication bet...
EduQuim is educational software for teaching chemistry in secondary school, using a Moodle enviro... more EduQuim is educational software for teaching chemistry in secondary school, using a Moodle environment. In extreme cases it can replace the teacher but can also be used as reinforcement in the teaching of the subject that can be applied remotely through different devices such as PC, mobile telephony, tablet among others. Its objective is to teach chemistry in an entertaining and simple way with a view to awakening in students' reasoned and methodical curiosity about this important branch of knowledge. In the present year, one of his video classes was featured in the History of Science category, in the Science in <em>Festival Ciencias en Videos -- Semilleros Científicos</em> organized by the Mincyt.
This work plants a method of estimate of harmful in structure by no lineal signals separation, ba... more This work plants a method of estimate of harmful in structure by no lineal signals separation, based in wavelet transform. The obtained results are superior in capacity of harmful estimate for reported in the literature. By system acceleration register and wavelet transform, the proposed method permits to estimate the instant and the amplitude of any structural failing
This paper presents an extensive review of major research carried out in the area of chemical sen... more This paper presents an extensive review of major research carried out in the area of chemical sensors and its application in the control of gases in sensitive environments to pollution. The gases considered in this study as contaminants of reference [1] are: carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3) and sulphur dioxide (SO2), as well as other compounds of impact as CO2, volatile organic compounds (VOCs), hydrocarbons (HC), oxides of nitrogen and sulphur in general (NOX and SOX). The existence of regulations have promoted the development of technology for the monitoring of the conditions in which are released to the environment pollutants to their control by providing essential information for an assertive decision-making. Then developed measuring equipment from contaminants based on di erent types of sensors and systems for monitoring necessary so that they can use in the monitoring and evaluation of the contamination [1]‐[3]. These systems include chemical sensors based on electrochemical and optical, piezoelectric transducers which, unlike the analytical methods, measure permanently and the place which produce atmospheric emissions and pollutants [4]‐[8].
This writing is a tribute to all the Venezuelan scientists who have left us in the prime of their... more This writing is a tribute to all the Venezuelan scientists who have left us in the prime of their lives. Dr. Domingo Maldonado Sánchez has had to leave, leaving behind a large work as academic and scientist. This short note represents just a sample of one who was a dedicated professor, outstanding researcher, and excellent friend.
This paper presents an extensive review of major research carried out in the area of chemical sen... more This paper presents an extensive review of major research carried out in the area of chemical sensors and its application in the control of gases in sensitive environments to pollution. The gases considered in this study as contaminants of reference [1] are: carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3) and sulphur dioxide (SO2), as well as other compounds of impact as CO2, volatile organic compounds (VOCs), hydrocarbons (HC), oxides of nitrogen and sulphur in general (NOX and SOX). The existence of regulations have promoted the development of technology for the monitoring of the conditions in which are released to the environment pollutants to their control by providing essential information for an assertive decision-making. Then developed measuring equipment from contaminants based on di erent types of sensors and systems for monitoring necessary so that they can use in the monitoring and evaluation of the contamination [1]‐[3]. These systems include chemical sensors ba...
... UV ALEYDA MONTAÑEZ1, LISBETH MANGANIELLO1*, NANCY MENDOZA1, CRISTÓBAL VEGA2, RICHARD MORA3 1U... more ... UV ALEYDA MONTAÑEZ1, LISBETH MANGANIELLO1*, NANCY MENDOZA1, CRISTÓBAL VEGA2, RICHARD MORA3 1Universidad ... pintura. Puede movili-zarse al agua subterránea a través del suelo. La IARC ha determinado ...
Leather samples were prepared and characterized as &#39;in house&#39; matrix standards fo... more Leather samples were prepared and characterized as &#39;in house&#39; matrix standards for the determination of fat. The Soxhlet standard method was used to establish the reference fat content in every standard sample. Sample homogeneity and stability were examined under specific storing conditions. The materials were subsequently used as matrix standards for the determination of fat in leather samples, using supercritical fluid extraction (SFE) with on-line piezoelectric detection. Real samples were weighed in the extraction SFE thimble, previously loaded with 1 g of diatomaceous earth. A temperature of 45 degrees C and a CO2 fluid density of 0.85 g ml-1 were used for extraction. The linear calibration range thus achieved was 0.001-0.040% m/m total fat (related to the weight of the leather) and the relative standard deviation +/- 3% (n = 11; P = 0.05). The results were compared with those obtained with the Soxhlet method and no significant differences were found.
The efficient editorial management of the manuscripts that are consigned to the scientific journa... more The efficient editorial management of the manuscripts that are consigned to the scientific journals for review considers as a preliminary step the verification of their originality. A previously published writing or with a high percentage of paragraphs taken from other authors without the proper reference or the correct use of the ``\emph{textual citation}'' resource is insupportable, due to the consequences that it entails from the point of view of the integrity of the journal that publishes it, as well as the legal actions to which both the members of the editorial committee and the authors who have incurred the fault are exposed. In order to guarantee the quality of the work carried out in the journal Ciencia en Revolución, this document includes the main aspects of the antiplagic policy being carried out. To begin with, the definition of plagiarism and the importance of its detection are exposed. The most common types are identified below, clarifying the cases in which t...
These notes present a basic overview of the most relevant aspects of the role of scientific journ... more These notes present a basic overview of the most relevant aspects of the role of scientific journals in open science; for the review, the definition of open science established by the European Union forum is examined. The given concept covers many areas of academic society; furthermore, open science is supported by open data, open source, open access, and open review. It has a clear, free, discovered, broad and expeditious methodology; with open sources in software and hardware that allow the entire community greater accessibility. The purpose of open science is the production of public scientific goods through the exchange of results and collaboration. The characteristics that a scientific journal and its repositories should have are carefully analyzed; as well as, the contradictions in society in the face of open science policies are also studied. The advances of open science in Venezuela are also presented. To conclude that the goal of open science is to promote communication bet...
EduQuim is educational software for teaching chemistry in secondary school, using a Moodle enviro... more EduQuim is educational software for teaching chemistry in secondary school, using a Moodle environment. In extreme cases it can replace the teacher but can also be used as reinforcement in the teaching of the subject that can be applied remotely through different devices such as PC, mobile telephony, tablet among others. Its objective is to teach chemistry in an entertaining and simple way with a view to awakening in students' reasoned and methodical curiosity about this important branch of knowledge. In the present year, one of his video classes was featured in the History of Science category, in the Science in <em>Festival Ciencias en Videos -- Semilleros Científicos</em> organized by the Mincyt.
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