Recently there are studies which particularly investigated efficiency of silver on neoplastic diseases. and many other diseases. Low level laser therapy(LLLT) has been shown to modulate biological processes and there are many studies that investigate the effect of LLLT, which is used in the treatment of cancers currently. Methods: Breast(MCF7) and colon(Caco 2) cells were cultured and cells were divided into eleven main groups. Cells were incubated with colloidal silver for 24 hrs. Colloidal silver and LLLT exposure separately and together performed on MCF7 and Caco 2 cell cultures. The effects of colloidal silver and LLLT were invastigated on all molecular pathways of apoptosis. Results: It was found that the levels of apoptosis in colloidal silver group were significantly increased in both cancer cells compared to control group. In both cancer cells, transient receptor protein vanilloid 1 (TRPV1) channel stimulator Cpsin administration resulted in significantly increased apoptosis levels compared to the control group, in colloidal silver + LLLT group the apopitosis level significantly reduced compared to colloidal silver-only group.Conclusions: It has been shown that colloidal silver significantly increases apoptosis in breast and colon cancer cells, however LLLT administration decreases apoptosis in both wavelength and suppressed apoptotic effect of colloidal silver significantly on these cells.
{"title":"LOW LEVEL LASER THERAPY REDUCES ANTICANCER POTENTIAL OF COLLOIDAL SILVER THROUGH TRPV1 CHANNELS","authors":"İ. Övey, Yılmaz Güler, Ö. Çelik","doi":"10.59671/hje0t","DOIUrl":"https://doi.org/10.59671/hje0t","url":null,"abstract":"Recently there are studies which particularly investigated efficiency of silver on neoplastic diseases. and many other diseases. Low level laser therapy(LLLT) has been shown to modulate biological processes and there are many studies that investigate the effect of LLLT, which is used in the treatment of cancers currently. Methods: Breast(MCF7) and colon(Caco 2) cells were cultured and cells were divided into eleven main groups. Cells were incubated with colloidal silver for 24 hrs. Colloidal silver and LLLT exposure separately and together performed on MCF7 and Caco 2 cell cultures. The effects of colloidal silver and LLLT were invastigated on all molecular pathways of apoptosis. Results: It was found that the levels of apoptosis in colloidal silver group were significantly increased in both cancer cells compared to control group. In both cancer cells, transient receptor protein vanilloid 1 (TRPV1) channel stimulator Cpsin administration resulted in significantly increased apoptosis levels compared to the control group, in colloidal silver + LLLT group the apopitosis level significantly reduced compared to colloidal silver-only group.Conclusions: It has been shown that colloidal silver significantly increases apoptosis in breast and colon cancer cells, however LLLT administration decreases apoptosis in both wavelength and suppressed apoptotic effect of colloidal silver significantly on these cells.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46947625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. E. Loredo-Carrillo, E. Leyva, J. Aguilar, Sarai Vega-Rodriguez
Las azidas aromáticas son compuestos altamente reactivos y versátiles debido a sus características fisicoquímicas. De acuerdo a las condiciones de reacción forman varios intermediarios que pueden seguir diferentes rutas para dar productos diversos. Además, son utilizados en la técnica de marcado de fotoafinidad por sus características fotoquímicas y estabilidad. Son precursores en la síntesis de compuestos heterocíclicos con actividad biológica como triazoles, azepinas y benzofuroxanos, además también se usan en la química de materiales. En esta revisión se describen las propiedades fisicoquímicas, químicas y fotoquímicas de la azidas, las condiciones y sustituyentes que favorecen la formación de algunos productos y se mencionan las aplicaciones de este tipo de compuestos.
{"title":"AZIDAS AROMATICAS. PROPIEDADES FISICOQUIMICAS, REACTIVIDAD Y APLICACIONES EN SINTESIS ORGANICA, BIOQUIMICA Y MEDICINA.","authors":"S. E. Loredo-Carrillo, E. Leyva, J. Aguilar, Sarai Vega-Rodriguez","doi":"10.59671/rksca","DOIUrl":"https://doi.org/10.59671/rksca","url":null,"abstract":"Las azidas aromáticas son compuestos altamente reactivos y versátiles debido a sus características fisicoquímicas. De acuerdo a las condiciones de reacción forman varios intermediarios que pueden seguir diferentes rutas para dar productos diversos. Además, son utilizados en la técnica de marcado de fotoafinidad por sus características fotoquímicas y estabilidad. Son precursores en la síntesis de compuestos heterocíclicos con actividad biológica como triazoles, azepinas y benzofuroxanos, además también se usan en la química de materiales. En esta revisión se describen las propiedades fisicoquímicas, químicas y fotoquímicas de la azidas, las condiciones y sustituyentes que favorecen la formación de algunos productos y se mencionan las aplicaciones de este tipo de compuestos.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71124891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mirian de Oliveira Bertotti,, Robson Fonseca Simoes
Este estudo, um diálogo com uma pesquisa de doutoramento, junto ao Programa de Pós-graduação Em Educação Escolar, traz para discussão possíveis entrelaçamentos entre a Literatura e a História. Objetiva-se compreender de que forma estes campos desvelam o colonizar das terras da Amazônia ocidental brasileira, especificamente o município de Ariquemes, situado no Vale do Jamari, estado de Rondônia. Numa abordagem qualitativa, optou-se por uma operação historiográfica como investigação metodológica, já que permite o entrecruzar das diversas fontes como experiências e saberes dos sujeitos sociais. Os resultados do estudo mostraram que as fontes literárias complementam as fontes históricas se complementam, já que ao apresentarem as perspectivas dos atores envolvidos por meio de gêneros textuais diversos, podemos entender o processo colonizador para além dos documentos, como ele foi vivido e sentido pelos sujeitos.
{"title":"LITERATURA E HISTÓRIA EM TERRAS AMAZÔNICAS: ENTREMEANDO FIOS HISTORIOGRÁFICOS","authors":"Mirian de Oliveira Bertotti,, Robson Fonseca Simoes","doi":"10.59671/gyjia","DOIUrl":"https://doi.org/10.59671/gyjia","url":null,"abstract":"Este estudo, um diálogo com uma pesquisa de doutoramento, junto ao Programa de Pós-graduação Em Educação Escolar, traz para discussão possíveis entrelaçamentos entre a Literatura e a História. Objetiva-se compreender de que forma estes campos desvelam o colonizar das terras da Amazônia ocidental brasileira, especificamente o município de Ariquemes, situado no Vale do Jamari, estado de Rondônia. Numa abordagem qualitativa, optou-se por uma operação historiográfica como investigação metodológica, já que permite o entrecruzar das diversas fontes como experiências e saberes dos sujeitos sociais. Os resultados do estudo mostraram que as fontes literárias complementam as fontes históricas se complementam, já que ao apresentarem as perspectivas dos atores envolvidos por meio de gêneros textuais diversos, podemos entender o processo colonizador para além dos documentos, como ele foi vivido e sentido pelos sujeitos.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135495669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Metal nonoparticles stabilized by polymers is emerging as a new class of materials having entirely new physico-chemical properties as that of bulk and atom both. Stabilizers play important role in protecting the nanoparticles and also contributes in improvising the overall surface area. Chitosan, a natural polymer is selected as a stabilizer for the synthesis of iron containing nanoparticles. These nonoparticles are thoroughly characterized by using BETsurface area, FTIR, TEM and XPS. TEM image is showing well dispersed nanofibers with average size of 13nm. XPS data supports the formation of Fe2O3 type structure with O1s binding energy at 534.5 eV and Fe 2P3/2 and Fe 2P1/2 binding energies at 712eV and 723.2 eV. BET Surface area value is 36.72m2 /g with pore size of 145.16 and pore volume of 0.1332 cm3 /g. This synthesized nanomaterial was evaluated for photocatalytic hydrogen generation via water splitting reaction. Iron containing nanoparticles are showing excellent photocatalytic activity with hydrogen generation yield of 55.5 mmoles h-1g -1 of photocatalyst. The nanoparticles are magnetically retrievable and hence can be separated effectively from heterogeneous system.
{"title":"Chitosan Stabilised Iron Containing Nanoparticles For Photocatalytic Hydrogen Generation","authors":"Meenal Joshi, Sadhana S. Rayalu","doi":"10.59671/f7ran","DOIUrl":"https://doi.org/10.59671/f7ran","url":null,"abstract":"Metal nonoparticles stabilized by polymers is emerging as a new class of materials having entirely new physico-chemical properties as that of bulk and atom both. Stabilizers play important role in protecting the nanoparticles and also contributes in improvising the overall surface area. Chitosan, a natural polymer is selected as a stabilizer for the synthesis of iron containing nanoparticles. These nonoparticles are thoroughly characterized by using BETsurface area, FTIR, TEM and XPS. TEM image is showing well dispersed nanofibers with average size of 13nm. XPS data supports the formation of Fe2O3 type structure with O1s binding energy at 534.5 eV and Fe 2P3/2 and Fe 2P1/2 binding energies at 712eV and 723.2 eV. BET Surface area value is 36.72m2 /g with pore size of 145.16 and pore volume of 0.1332 cm3 /g. This synthesized nanomaterial was evaluated for photocatalytic hydrogen generation via water splitting reaction. Iron containing nanoparticles are showing excellent photocatalytic activity with hydrogen generation yield of 55.5 mmoles h-1g -1 of photocatalyst. The nanoparticles are magnetically retrievable and hence can be separated effectively from heterogeneous system.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135153059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The current English language curriculum in primary and secondary schools in Turkey has been framed by The Common European Framework of Reference for Languages (CEFR) in an endeavour to bring in a more communication-oriented perspective on language education. This study aimed to evaluate the CEFR framed curriculum from the perspectives of teachers who apply it in the classroom. An exploratory sequential mixed method research design, which encompassed a 40-item questionnaire (100 participants), a 25-item semi-structured interview (6 secondary and 3 primary school teachers), and document analysis, was employed in primary and secondary schools in Sultanbeyli, Umraniye, and Besiktas districts of Istanbul. The results showed that lack of knowledge about the CEFR and the contextual factors such as overcrowded classrooms and limited class contact hours greatly affected the implementation phase of the curriculum. It was also revealed that there is a remarkable mismatch between the language education policy (communication-oriented) and the classroom practices (exam-oriented). The findings of this study implied that teachers need ongoing in-service training about the CEFR framed curriculum to enhance their understanding of the implementation of its principles in the classroom. The implications of the study, most notably the need for well-tailored in-service training, are also discussed.
{"title":"Evaluation of the CEFR framed English language curriculum in primary and secondary schools in Turkey: teachers` perspectives","authors":"A. Çebi, Ilkay Gilanlioglu","doi":"10.59671/alfdo","DOIUrl":"https://doi.org/10.59671/alfdo","url":null,"abstract":"The current English language curriculum in primary and secondary schools in Turkey has been framed by The Common European Framework of Reference for Languages (CEFR) in an endeavour to bring in a more communication-oriented perspective on language education. This study aimed to evaluate the CEFR framed curriculum from the perspectives of teachers who apply it in the classroom. An exploratory sequential mixed method research design, which encompassed a 40-item questionnaire (100 participants), a 25-item semi-structured interview (6 secondary and 3 primary school teachers), and document analysis, was employed in primary and secondary schools in Sultanbeyli, Umraniye, and Besiktas districts of Istanbul. The results showed that lack of knowledge about the CEFR and the contextual factors such as overcrowded classrooms and limited class contact hours greatly affected the implementation phase of the curriculum. It was also revealed that there is a remarkable mismatch between the language education policy (communication-oriented) and the classroom practices (exam-oriented). The findings of this study implied that teachers need ongoing in-service training about the CEFR framed curriculum to enhance their understanding of the implementation of its principles in the classroom. The implications of the study, most notably the need for well-tailored in-service training, are also discussed.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71124208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dental tourism is one of the fastest-growing and developing sub-branches of medicaltourism. However, academic research in this field is quite limited. Moreover, the verylimited studies in T�rkiye, where the research was conducted, mainly focus on themotivations and destination preferences of dental tourists. This study is a survey-basedstudy conducted with dentists. The cross-sectional study population includes 310 dentistsat private health institutions in Antalya province, and the data were collected face-to-facebetween 2022-2023. According to the results obtained in the study, it was determined thatdental tourists mostly have implanted veneers, crowns, dental bridges and teeth whiteningprocedures. The study also determined that the dental tourism knowledge of dentists is ata reasonable level.
{"title":"DENTAL TOURISM POTENTIAL FROM THE PERSPECTIVE OF DENTISTS: THE CASE OF ANTALYA PROVINCE","authors":"Zeynep Aydin Kilinc, Harun Ucak","doi":"10.59671/emma1","DOIUrl":"https://doi.org/10.59671/emma1","url":null,"abstract":"Dental tourism is one of the fastest-growing and developing sub-branches of medicaltourism. However, academic research in this field is quite limited. Moreover, the verylimited studies in T�rkiye, where the research was conducted, mainly focus on themotivations and destination preferences of dental tourists. This study is a survey-basedstudy conducted with dentists. The cross-sectional study population includes 310 dentistsat private health institutions in Antalya province, and the data were collected face-to-facebetween 2022-2023. According to the results obtained in the study, it was determined thatdental tourists mostly have implanted veneers, crowns, dental bridges and teeth whiteningprocedures. The study also determined that the dental tourism knowledge of dentists is ata reasonable level.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135059412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article examines, for the first time, the relationship between learning style, motivation, and self-discipline, as factors that affect tertiary students’ perceptions of online learning, from a retrospective perspective. The period between 2019 and 2022 was and remains one in which students are rethinking the components of teaching and learning. In addition, from the learners’ perspective, social, cultural, and technological changes to which they were subject, including substantial changes to learning environments and learning methods, heightened learners’ need to reconsider time planning. This study is based on 1,928 students enrolled in several academic institutions. We used a mixed-methods design for this exploratory research, incorporating qualitative and quantitative analysis, to develop the proposed Online Teaching Recommendations (SOTR) model. We used Structural Equation Modeling (SEM) for goodness-of-fit. Findings indicate that with respect to self-discipline, distractions and interruptions at home hinder students’ online learning, but they do not lower students’ assessments of the quality of online teaching. We may assume that students learn how to integrate online teaching in their everyday lives, and the short-term disadvantage may become a positive experience as students persist in their academic studies. Moreover, online teaching demands students’ self-discipline, which also has no effect on perceived teaching quality. However, students’ motivation declines following online teaching, s does self-discipline, which lowers perceived teaching quality. Students are concerned by the decline in social interactions with their class mates, caused by online learning, but this decline does not adversely affect their learning process. Findings of this study may contribute to improving teaching and learning for students who use digital tools for learning, especially in academic institutions where frontal instruction remains relevant and significant. Findings support the importance of the relationship between students’ learning methods, motivation, and self-discipline, which are factors that affect students’ perceptions of online learning. The question is whether academic instructors should enhance students’ motivation to improve their self-discipline skills or whether these factors are related exclusively to students.
{"title":"The Effects of Learning Method, Motivation, and Self-Discipline on Students’ Retrospective Perceptions of Online Learning","authors":"Eyal Eckhaus, Nitza Davidovitch","doi":"10.59671/imvn3","DOIUrl":"https://doi.org/10.59671/imvn3","url":null,"abstract":"This article examines, for the first time, the relationship between learning style, motivation, and self-discipline, as factors that affect tertiary students’ perceptions of online learning, from a retrospective perspective. The period between 2019 and 2022 was and remains one in which students are rethinking the components of teaching and learning. In addition, from the learners’ perspective, social, cultural, and technological changes to which they were subject, including substantial changes to learning environments and learning methods, heightened learners’ need to reconsider time planning. This study is based on 1,928 students enrolled in several academic institutions. We used a mixed-methods design for this exploratory research, incorporating qualitative and quantitative analysis, to develop the proposed Online Teaching Recommendations (SOTR) model. We used Structural Equation Modeling (SEM) for goodness-of-fit. Findings indicate that with respect to self-discipline, distractions and interruptions at home hinder students’ online learning, but they do not lower students’ assessments of the quality of online teaching. We may assume that students learn how to integrate online teaching in their everyday lives, and the short-term disadvantage may become a positive experience as students persist in their academic studies. Moreover, online teaching demands students’ self-discipline, which also has no effect on perceived teaching quality. However, students’ motivation declines following online teaching, s does self-discipline, which lowers perceived teaching quality. Students are concerned by the decline in social interactions with their class mates, caused by online learning, but this decline does not adversely affect their learning process. Findings of this study may contribute to improving teaching and learning for students who use digital tools for learning, especially in academic institutions where frontal instruction remains relevant and significant. Findings support the importance of the relationship between students’ learning methods, motivation, and self-discipline, which are factors that affect students’ perceptions of online learning. The question is whether academic instructors should enhance students’ motivation to improve their self-discipline skills or whether these factors are related exclusively to students.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136302789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Industries such as oil, gas, and petrochemicals encounter a multifaceted challenge when it comes to the transportation of diverse substances through pipelines. The process relies heavily on two-phase flow, particularly in the case of seabed pipelines responsible for conveying oil and natural gas. In our study, the intricate dynamics of pressure fluctuations in horizontal seabed pipelines were comprehensively investigated through the use of simulation software. Nevertheless, the software employed had its limitations as it failed to account for economic considerations. To address this limitation, the integration of a genetic algorithm was undertaken, which encompassed constraints related to the initial investment, thereby contributing to the enhancement of cost-effectiveness in pressure drop calculations. Additionally, a novel parameter was introduced into the Baker model, leading to improvements in both technical efficiency and economic viability. It was observed that augmenting the weight of the initial investment constraint resulted in a reduction in the optimal pipeline diameter, following a third-degree curve. Furthermore, the research findings indicated that a 4% increase in water shear led to a 14.76% decrease in frictional pressure drop within vertical pipes and a 3.5% reduction in horizontal pipes. Conversely, as the gas-to-oil ratio was increased, frictional pressure drop surged by 116.87% in vertical pipes and 81.69% in horizontal pipes. This valuable information can be harnessed to optimize pipeline design and operations in the demanding underwater environments commonly encountered in these industries.
{"title":"Pipe Diameter Optimization and Two-Phase Flow Pressure Drop in Seabed Pipelines: A Genetic Algorithm Approach","authors":"Ehsan Khamehchi, Matin Dargi, Matin Imeri, Javad Mahdavi Kalatehno, Mohammad Reza Khaleghi","doi":"10.59671/9tuvf","DOIUrl":"https://doi.org/10.59671/9tuvf","url":null,"abstract":"Industries such as oil, gas, and petrochemicals encounter a multifaceted challenge when it comes to the transportation of diverse substances through pipelines. The process relies heavily on two-phase flow, particularly in the case of seabed pipelines responsible for conveying oil and natural gas. In our study, the intricate dynamics of pressure fluctuations in horizontal seabed pipelines were comprehensively investigated through the use of simulation software. Nevertheless, the software employed had its limitations as it failed to account for economic considerations. To address this limitation, the integration of a genetic algorithm was undertaken, which encompassed constraints related to the initial investment, thereby contributing to the enhancement of cost-effectiveness in pressure drop calculations. Additionally, a novel parameter was introduced into the Baker model, leading to improvements in both technical efficiency and economic viability. It was observed that augmenting the weight of the initial investment constraint resulted in a reduction in the optimal pipeline diameter, following a third-degree curve. Furthermore, the research findings indicated that a 4% increase in water shear led to a 14.76% decrease in frictional pressure drop within vertical pipes and a 3.5% reduction in horizontal pipes. Conversely, as the gas-to-oil ratio was increased, frictional pressure drop surged by 116.87% in vertical pipes and 81.69% in horizontal pipes. This valuable information can be harnessed to optimize pipeline design and operations in the demanding underwater environments commonly encountered in these industries.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135699602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bovine abortion is one of the most important causes of economic losses in Algerian cattle farms and industry. A descriptive epidemiological survey was conducted from November 2021 to November 2022 in eastern Algeria to quantify the extent of this scourge and to evaluate the risk factors for reporting abortions using a questionnaire intended for 150 practising veterinarians randomly distributed in five wilayas of eastern Algeria. The statistical analysis of the different risk factors was carried out using a univariate and then multivariate logistic regression model. The results obtained showed that 83.3% of the veterinarians audited had had an abortion rate of more than 5% during the previous 12 months. In the multivariate logistic regression analysis, one risk factor and one protective factor were identified. Indeed, all the areas studied had a very high risk of bovine abortion cases: Batna (odds ratio [OR] = 24.53; 95% confidence interval [CI]: 1.39 - 278.66), Sétif (OR= 73.08; 95% CI: 4.37-669.68), Mila (OR= 245.22; CI: 18.51 - 2306.71) and Bordj Bou Arreridj (OR= 49.09; CI: 3.57-738.69). However, the summer season (OR= 0.23; 95% CI: 0.06 - 0.48) was considered a protective factor, designated as the period of least reporting of abortions by the audited veterinarians compared to winter and autumn.
{"title":"STUDY OF FACTORS INFLUENCING NOTIFICATION OF BOVINE ABORTIONS BY PRACTICING VETERINARIANS ON DAIRY CATTLE FARMS IN EASTERN ALGERIA.","authors":"Nadia DJELLATA","doi":"10.59671/icfwk","DOIUrl":"https://doi.org/10.59671/icfwk","url":null,"abstract":"Bovine abortion is one of the most important causes of economic losses in Algerian cattle farms and industry. A descriptive epidemiological survey was conducted from November 2021 to November 2022 in eastern Algeria to quantify the extent of this scourge and to evaluate the risk factors for reporting abortions using a questionnaire intended for 150 practising veterinarians randomly distributed in five wilayas of eastern Algeria. The statistical analysis of the different risk factors was carried out using a univariate and then multivariate logistic regression model. The results obtained showed that 83.3% of the veterinarians audited had had an abortion rate of more than 5% during the previous 12 months. In the multivariate logistic regression analysis, one risk factor and one protective factor were identified. Indeed, all the areas studied had a very high risk of bovine abortion cases: Batna (odds ratio [OR] = 24.53; 95% confidence interval [CI]: 1.39 - 278.66), Sétif (OR= 73.08; 95% CI: 4.37-669.68), Mila (OR= 245.22; CI: 18.51 - 2306.71) and Bordj Bou Arreridj (OR= 49.09; CI: 3.57-738.69). However, the summer season (OR= 0.23; 95% CI: 0.06 - 0.48) was considered a protective factor, designated as the period of least reporting of abortions by the audited veterinarians compared to winter and autumn.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135699606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sandeep Kumar, S. Dhanabalan, C. Sathiya Narayanan
The increased demand for miniaturization of complex systems necessitates the production of smaller components, cutting with precision dimensional accuracy. Furthermore, Wire cut electrical discharge machining (WEDM) process is the prominent to the fastest growing industries because of their accuracy, the possibility to obtain complex shapes, close tolerances and economically. Therefore, the aim of this experimental work is to analyze the impact of pulse on time and wire feed rate on performance characteristics namely, kerf width and heat affected zone (HAZ). In this experimental investigation, micro level slot cutting experiments were carried out on aluminum plate of 2 mm thickness by WEDM with response surface design. Multi-criteria decision making Grey relational analysis (GRA) technique has been utilized to find optimal machine settings of process constraints. Polynomial models were developed for output constraints. From results, it is analyzed that the pulse on time has more dominance on kerf width, whereas the wire feed rate has a higher influence on HAZ. The obtained outcomes will expedite the advanced machining industries to enhance machinability and dimensional accuracy.
{"title":"Experimental analysis of Aluminum alloy 8011 using Wire cut Electrical discharge machining","authors":"Sandeep Kumar, S. Dhanabalan, C. Sathiya Narayanan","doi":"10.59671/adnjc","DOIUrl":"https://doi.org/10.59671/adnjc","url":null,"abstract":"The increased demand for miniaturization of complex systems necessitates the production of smaller components, cutting with precision dimensional accuracy. Furthermore, Wire cut electrical discharge machining (WEDM) process is the prominent to the fastest growing industries because of their accuracy, the possibility to obtain complex shapes, close tolerances and economically. Therefore, the aim of this experimental work is to analyze the impact of pulse on time and wire feed rate on performance characteristics namely, kerf width and heat affected zone (HAZ). In this experimental investigation, micro level slot cutting experiments were carried out on aluminum plate of 2 mm thickness by WEDM with response surface design. Multi-criteria decision making Grey relational analysis (GRA) technique has been utilized to find optimal machine settings of process constraints. Polynomial models were developed for output constraints. From results, it is analyzed that the pulse on time has more dominance on kerf width, whereas the wire feed rate has a higher influence on HAZ. The obtained outcomes will expedite the advanced machining industries to enhance machinability and dimensional accuracy.","PeriodicalId":13651,"journal":{"name":"Interciencia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71124149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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