Papers by Elsa L. Cajucom
International journal of engineering technologies and management research, May 17, 2024
The study presents a novel method for synthesizing silver nanoparticles (AgNPs) using A. panicula... more The study presents a novel method for synthesizing silver nanoparticles (AgNPs) using A. paniculata leaves extract as a bioreducing agent for Ag+ ions derived from AgNO3. The biomolecules within the extract are credited with the reduction process. Characterization techniques including UV-Vis spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, X-ray Diffraction (XRD) analysis, and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX) analysis were employed to analyze the properties of the synthesized nanoparticles. UV-Vis spectroscopy revealed a prominent Surface Plasmon Resonance (SPR) peak at 550 nm, indicative of the presence of AgNPs with efficient light absorption and scattering properties. SEM analysis provided insights into the morphology and size distribution of the nanoparticles. XRD analysis confirmed the crystalline nature of the nanoparticles, while EDX analysis corroborated the presence of elemental silver in the nanoparticle composition. The antimicrobial activity of the synthesized AgNPs against a spectrum of human pathogens, particularly noteworthy inhibition against E. coli and S. aureus, highlights their potential as antimicrobial agents. Furthermore, the antioxidant activity assessed through the DPPH scavenging assay underscores the potential health benefits of these nanoparticles. A notable observation was the variation in activity between A. paniculata extract and A. paniculata-AgNPs, with the latter exhibiting reduced inhibitory effects attributed to fewer functional groups on the nanoparticle surface. This finding contributes to a deeper understanding of structurefunction relationships in nanoparticle-based applications.
Psychology and Education: A Multidisciplinary Journal, Apr 26, 2024
The COVID-19 pandemic necessitated a shift towards technology-driven education, prompting an exam... more The COVID-19 pandemic necessitated a shift towards technology-driven education, prompting an examination of teachers' Technological Pedagogical Content Knowledge (TPACK) competence and attitudes towards technology integration. Drawing data from science teachers in Ifugao Province and Region II, Philippines, this study reveals a high level of TPACK-21 competence, particularly in Pedagogical Knowledge (PK), Pedagogical Content Knowledge (PCK), and Technological Pedagogical Knowledge (TPK) domains. Moderate proficiency is noted in Technological Knowledge (TK) and Content Knowledge (CK), with lower skill levels observed in integrating Technological Content Knowledge (TCK). Teachers exhibit positive attitudes towards technology integration, with a significant correlation between TPACK-21 competence and favorable attitudes. The findings underscore the importance of enhancing TPACK-21 competence to foster a more conducive environment for technology integration in chemistry education. As educators strive to adapt to the evolving educational landscape, cultivating TPACK-21 competence emerges as a crucial strategy for promoting innovative teaching practices in the digital age.
IJCER (International Journal of Chemistry Education Research)
This research endeavored to assess developed and validated a proposed learning module in General ... more This research endeavored to assess developed and validated a proposed learning module in General Chemistry during the Second Semester, Academic Year 2021-2022 in public secondary schools in Bulacan, Philippines. Teachers play an essential role in validating and evaluation of instructional materials. As facilitators of learning, they must ensure that instructional materials serve their purpose of upholding an effective teaching and learning process. The study aimed to evaluate the proposed Grade 12 General Chemistry learning modules as perceived by Chemistry Experts and Science Teachers in the 12 public secondary schools offering STEM strand in the Division of Bulacan, Philippines. The modules are evaluated based on :(1) content, (2) format, (3) presentation and organization, (4) learning activities, (5) evaluation activities and (6) accuracy and up-to-datedness of information. The demographic profile of 11 Chemistry experts showed that the majority are female, BSED graduates in Phys...
International Journal of Engineering Technologies and Management Research
Silver nanoparticles have diverse qualities with significant applications. Amidst the challenge o... more Silver nanoparticles have diverse qualities with significant applications. Amidst the challenge of growing antimicrobial resistance, incorporating these nanoparticles into drug delivery systems could offer solutions. Thus, their extensive production holds promise, particularly in healthcare. This experimental research aimed to unveil the potential of Betel leaf (Piper betel) extracts to formulate Silver Nanoparticles and their antibacterial, antioxidant, and cytotoxic properties. UV-VIS Spectrophotometry was utilized to quantify the bioformulated AgNPs. The presence of biosynthesized silver nanoparticles was verified by the color change in all five varying concentrations of solution from greenish to dark brown. The decrease in bacterial growth rate becomes noticeable as the concentration of Ag nanoparticles rises. AgNPs in Sample 5 (higher concentration) exhibited the highest antibacterial activity for Staphylococcus aureus (11.25 mm and Escherichia coli (11.20 mm)—both partially ac...
International journal of engineering technologies and management research, Apr 10, 2023
The presence of flavonoids in white pitaya's flesh and peel was confirmed using the Thin ... more The presence of flavonoids in white pitaya's flesh and peel was confirmed using the Thin Layer Chromatography Screening method. Flavonoid was extracted using solvent fractionation and then subjected to the three assays. Using the Kirby-Bauer method, better antibacterial activity against E. coli was found using 100% peel extract, partially active at 10.28 mm. The flesh flavonoid extract was inactive against both E. coli and S. aureus at concentrations of 100%, 75%, and 50%. The flavonoid peel and flesh have the potential as anticancer agents since they are active, toxic, and potent, with LC50 of less than 1000 ppm in Brine Shrimp Lethality Assay. Using a UV VIS spectrophotometer at 517 nm, both the flesh flavonoid extract and the peel flavonoid extract have antioxidant potential. However, the flesh with a percent Radical Scavenging Activity close to the catechin control is a better antioxidant. This study proved that the peel and flesh of White Pitaya, particularly its flavonoid, have medical benefits, can be a potential source of income for farmers, and decrease waste in the environment.
IOER International Multidisciplinary Research Journal, 2023
This study identified the experienced challenges of junior high school chemistry learners of priv... more This study identified the experienced challenges of junior high school chemistry learners of private and public schools in parts of Nueva Vizcaya in the enriched virtual mode. The qualitative approach was used to describe the lived and actual experiences of the learners. Responses gathered from the Google Form link of the four open-ended questions were coded, clustered into categories, and derived into emerging themes. Results from the learners' responses revealed three emerging themes regarding their challenges-pedagogical, technological, and sociological. Pedagogical challenges revolved around their learning environment, inability to understand the lesson, quality of learning materials, limited access to learning resources, and overloaded lesson activities. Problems with technological insufficiency and technological literacy were under technological challenges and time management, lack of interest, lack of confidence, too much social media distractions, lack of support, difficulty in establishing connection and communication, and compromised health and wellness of the learners were among the specific sociological challenges. In conclusion, the unprecedented uncertainties brought by the sudden shift of learning modalities brought immense difficulties on the part of chemistry learners.
International Multidisciplinary Research Journal
This study identified the experienced challenges of junior high school chemistry learners of priv... more This study identified the experienced challenges of junior high school chemistry learners of private and public schools in parts of Nueva Vizcaya in the enriched virtual mode. A qualitative approach was used to describe the lived and actual experiences of the learners. Responses gathered from the Google Form link of the four open-ended questions were coded, clustered into categories, and derived into emerging themes. Results from the learners’ responses revealed three emerging themes regarding their challenges—pedagogical, technological, and sociological. Pedagogical challenges revolved around their learning environment, inability to understand the lesson, quality of learning materials, limited access to learning resources, and overloaded lesson activities. Problems with technological insufficiency and technological literacy were under technological challenges and time management, lack of interest, lack of confidence, too many social media distractions, lack of support, difficulty i...
Peace and survival of life on Earth are threatened by human activities that lack commitment and h... more Peace and survival of life on Earth are threatened by human activities that lack commitment and humanitarian values. As responsible stewards of God’s creation, everyone is called to make the Earth a beautiful garden for the human family. With the traversing environmental issues facing Nueva Vizcaya in terms of preservation and protection, schools are powerful in strengthening the level of environmental education. This study aimed to identify the integration of environmental education of the five identified model public schools in the Division of Nueva Vizcaya. The study explored and inquired the integration of environmental education through curriculum mapping of the learning competencies in the K to 12 Curriculum using topical approach, mapped out the legal bases of environmental education through content analysis, and distinguished the best practices of the sustainable and eco-friendly schools through document scanning of accomplishment reports using inductive reasoning technique. Findings of this study reveal that the learning competencies of the K to 12 Curriculum had integrated environmental education and specific topics on environmental education are interwoven with the legal mandates on environment protection and conservation. In support to Republic Act No. 9512, known as the National Environmental Education Awareness Act of 2008, vibrant eco-friendly and sustainable schools in Nueva Vizcaya as mandated by the Department of Education actively implement in their environmental programs and projects the environmental laws, namely: RA 9003, RA 8749, PD 705, RA 9147, RA 9275, EO 578, RA 9279, RA 8041, and RA 10121. The five sustainable and eco-friendly public schools are worth emulating when it comes to environmental education.
The aim of this research was to determine the teachers' and students' readiness o... more The aim of this research was to determine the teachers' and students' readiness on blended learning. Also, the struggles encountered by the teachers as well their best practices in the blended learning modalities were identified. To attain the level of readiness of the students and teachers to the new normal educational learning methods, an adopted but modified survey instrument was used. To determine the personal experiential accounts on the challenges and difficulties encountered under the new normal educational learning modalities and their breakthroughs or good practices in providing solutions, open-ended questionnaire was employed. Data revealed that the most available gadget of the respondents was mobile phone while the least was desktop computer. The level of readiness of the teachers and students in blended learning modalities was generally high. Among the six dimension of readiness, only online learning scored low for both teachers and students. Teachers most common difficulties encountered in blended learning were unstable internet connectivity, insufficient time to prepare learning materials, captivating students' focus in learning, and difficulty in addressing individual needs of their learners. The most common worst experiences they had were the following: online engagement thru chats, teaching problem-solving skills online, unavailability of materials for the experiment, and the academic dishonesty of the students. From the difficulties that the teachers have encountered, all of them looked for better internet service provider, trained themselves how to do the recording for the video lessons using online resources or through departmental tutorials, used alternative household materials for the experiment, and consistent online interaction to the learners thru personal chats via messenger and text as well as sent emails. For them, the best practices that are worth sustaining are preparation of pre-recorded video lessons and the extensive use of the features of the SMU LMS. As an output of this study, recommendations towards an enhanced blended learning thru the SMLP features in teaching and learning science were provided.
Psychology and Education: A Multidisciplinary Journal , 2022
The aim of this research was to determine the teachers' and students' readiness on blended learni... more The aim of this research was to determine the teachers' and students' readiness on blended learning. Also, the struggles encountered by the teachers as well their best practices in the blended learning modalities were identified. To attain the level of readiness of the students and teachers to the new normal educational learning methods, an adopted but modified survey instrument was used. To determine the personal experiential accounts on the challenges and difficulties encountered under the new normal educational learning modalities and their breakthroughs or good practices in providing solutions, open-ended questionnaire was employed. Data revealed that the most available gadget of the respondents was mobile phone while the least was desktop computer. The level of readiness of the teachers and students in blended learning modalities was generally high. Among the six dimension of readiness, only online learning scored low for both teachers and students. Teachers most common difficulties encountered in blended learning were unstable internet connectivity, insufficient time to prepare learning materials, captivating students' focus in learning, and difficulty in addressing individual needs of their learners. The most common worst experiences they had were the following: online engagement thru chats, teaching problem-solving skills online, unavailability of materials for the experiment, and the academic dishonesty of the students. From the difficulties that the teachers have encountered, all of them looked for better internet service provider, trained themselves how to do the recording for the video lessons using online resources or through departmental tutorials, used alternative household materials for the experiment, and consistent online interaction to the learners thru personal chats via messenger and text as well as sent emails. For them, the best practices that are worth sustaining are preparation of pre-recorded video lessons and the extensive use of the features of the SMU LMS. As an output of this study, recommendations towards an enhanced blended learning thru the SMLP features in teaching and learning science were provided.
volume 10 issue 4 by Elsa L. Cajucom
Granthaalayah Publications and printers, 2023
The presence of flavonoids in white pitaya's flesh and peel was confirmed using the Thin Layer Ch... more The presence of flavonoids in white pitaya's flesh and peel was confirmed using the Thin Layer Chromatography Screening method. Flavonoid was extracted using solvent fractionation and then subjected to the three assays. Using the Kirby-Bauer method, better antibacterial activity against E. coli was found using 100% peel extract, partially active at 10.28 mm. The flesh flavonoid extract was inactive against both E. coli and S. aureus at concentrations of 100%, 75%, and 50%. The flavonoid peel and flesh have the potential as anticancer agents since they are active, toxic, and potent, with LC50 of less than 1000 ppm in Brine Shrimp Lethality Assay. Using a UV VIS spectrophotometer at 517 nm, both the flesh flavonoid extract and the peel flavonoid extract have antioxidant potential. However, the flesh with a percent Radical Scavenging Activity close to the catechin control is a better antioxidant. This study proved that the peel and flesh of White Pitaya, particularly its flavonoid, have medical benefits, can be a potential source of income for farmers, and decrease waste in the environment.
International Journal of Engineering Technologies and Management Research, 2023
The presence of flavonoids in white pitaya's flesh and peel was confirmed using the Thin Layer Ch... more The presence of flavonoids in white pitaya's flesh and peel was confirmed using the Thin Layer Chromatography Screening method. Flavonoid was extracted using solvent fractionation and then subjected to the three assays. Using the Kirby-Bauer method, better antibacterial activity against E. coli was found using 100% peel extract, partially active at 10.28 mm. The flesh flavonoid extract was inactive against both E. coli and S. aureus at concentrations of 100%, 75%, and 50%. The flavonoid peel and flesh have the potential as anticancer agents since they are active, toxic, and potent, with LC50 of less than 1000 ppm in Brine Shrimp Lethality Assay. Using a UV VIS spectrophotometer at 517 nm, both the flesh flavonoid extract and the peel flavonoid extract have antioxidant potential. However, the flesh with a percent Radical Scavenging Activity close to the catechin control is a better antioxidant. This study proved that the peel and flesh of White Pitaya, particularly its flavonoid, have medical benefits, can be a potential source of income for farmers, and decrease waste in the environment.
Volume 11 Issue 5 by Elsa L. Cajucom
Granthaalayah Publications and Printers, 2024
The study presents a novel method for synthesizing silver nanoparticles (AgNPs) using A. panicula... more The study presents a novel method for synthesizing silver nanoparticles (AgNPs) using A. paniculata leaves extract as a bioreducing agent for Ag+ ions derived from AgNO3. The biomolecules within the extract are credited with the reduction process. Characterization techniques including UV-Vis spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, X-ray Diffraction (XRD) analysis, and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX) analysis were employed to analyze the properties of the synthesized nanoparticles. UV-Vis spectroscopy revealed a prominent Surface Plasmon Resonance (SPR) peak at 550 nm, indicative of the presence of AgNPs with efficient light absorption and scattering properties. SEM analysis provided insights into the morphology and size distribution of the nanoparticles. XRD analysis confirmed the crystalline nature of the nanoparticles, while EDX analysis corroborated the presence of elemental silver in the nanoparticle composition. The antimicrobial activity of the synthesized AgNPs against a spectrum of human pathogens, particularly noteworthy inhibition against E. coli and S. aureus, highlights their potential as antimicrobial agents. Furthermore, the antioxidant activity assessed through the DPPH scavenging assay underscores the potential health benefits of these nanoparticles. A notable observation was the variation in activity between A. paniculata extract and A. paniculata-AgNPs, with the latter exhibiting reduced inhibitory effects attributed to fewer functional groups on the nanoparticle surface. This finding contributes to a deeper understanding of structure-function relationships in nanoparticle-based applications.
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Papers by Elsa L. Cajucom
volume 10 issue 4 by Elsa L. Cajucom
Volume 11 Issue 5 by Elsa L. Cajucom