Pembaharuan Proses Pembelajaran Melalui Skema Evaluasi Pada Siswa Sekolah Dasar Inpres Wedomu (Program Pengabdian Masyarakat Mahasiswa Universitas Katolik Widya Mandira di Kabupaten Belu, Nusa Tenggara Timur)

Pandemi covid-19 memberikan dampak yang cukup signifikan termasuk dalam lembaga pendidikan. Pembelajaran secara daring menjadi pilihan yang harus dilakukan agar proses belajar mengajar tetap berjalan sebagaimana mestinya. Proses ini tentu menimbulkan banyak kendala yang dialami hingga berdampak pada menurunnya motivasi belajar siswa. SDI Wedomu merupakan salah satu lembaga pendidikan yang siswa/i-nya mengalami penurunan motivasi belajar akibat pandemic covid-19. Mengacu pada berbagai kendala selama pembelajaran secara daring, maka mahasiswa peserta KKNT-PPM Universitas katolik Widya Mandira memiliki salah satu program kerja utama yakni pengajaran dan pendampingan belajar bagi siswa sekolah dasar, dengan tujuan membangkitkan motivasi belajar siswa pasca pandemi. Fokus dari program ini adalah membantu siswa/i belajar membaca, menulis dan berhitung. Terdapat 5 tahapan dalam rangkaian program kerja ini yakni; observasi lingkungan, kerjasama dengan sekolah mitra, persiapan, pelaksanaan pengajaran dan bimbingan belajar, serta yang terakhir adalah evaluasi. Rangkaian kegiatan ini ditutup dengan adanya kegiatan gebyar literasi yakni lomba menarasikan cerita rakyat dan lomba narasi puisi. Hasil dari program kerja ini walau tidak secara instan membangkitkan motivasi belajar siswa/i, namun semangat belajar berangsur kembali pasca pandemi covid-19. Hal ini dapat dilihat dari siswa/i yang semangat mengerjakan tugas sekolah dan mengikuti pembelajaran dikelas hingga puncaknya adalah mengikuti gebyar literasi

Potential applications of nanotechnology in thermochemical conversion of microalgal biomass

The rapid decrease in fossil reserves has significantly increased the demand of renewable and sustainable energy fuel resources. Fluctuating fuel prices and significant greenhouse gas (GHG) emission levels have been key impediments associated with the production and utilization of nonrenewable fossil fuels. This has resulted in escalating interests to develop new and improve inexpensive carbon neutral energy technologies to meet future demands. Various process options to produce a variety of biofuels including biodiesel, bioethanol, biohydrogen, bio-oil, and biogas have been explored as an alternative to fossil fuels. The renewable, biodegradable, and nontoxic nature of biofuels make them appealing as alternative fuels. Biofuels can be produced from various renewable resources. Among these renewable resources, algae appear to be promising in delivering sustainable energy options. Algae have a high carbon dioxide (CO2) capturing efficiency, rapid growth rate, high biomass productivity, and the ability to grow in non-potable water. For algal biomass, the two main conversion pathways used to produce biofuel include biochemical and thermochemical conversions. Algal biofuel production is, however, challenged with process scalability for high conversion rates and high energy demands for biomass harvesting. This affects the viable achievement of industrial-scale bioprocess conversion under optimum economy. Although algal biofuels have the potential to provide a sustainable fuel for future, active research aimed at improving upstream and downstream technologies is critical. New technologies and improved systems focused on photobioreactor design, cultivation optimization, culture dewatering, and biofuel production are required to minimize the drawbacks associated with existing methods. Nanotechnology has the potential to address some of the upstream and downstream challenges associated with the development of algal biofuels. It can be applied to improve system design, cultivation, dewatering, biomass characterization, and biofuel conversion. This chapter discusses thermochemical conversion of microalgal biomass with recent advances in the application of nanotechnology to enhance the development of biofuels from algae. Nanotechnology has proven to improve the performance of existing technologies used in thermochemical treatment and conversion of biomass. The different bioprocess aspects, such as reactor design and operation, analytical techniques, and experimental validation of kinetic studies, to provide insights into the application of nanotechnology for enhanced algal biofuel production are addressed

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Seasonal stress on semen quality profiles, seminal biochemical and oxidative stress attributes in endangered Teressa goat of Andaman and Nicobar Islands

Objective: To measure seasonal effects on semen quality profiles, seminal biochemical and oxidative stress attributes in fresh and liquid stored semen in monsoon and dry seasons. Methods: A total of 10 Teressa bucks (3-4 years) were selected from breeding farm, ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India. Semen samples (n=25 per season) were collected through artificial vagina method and preserved at refrigerated temperature (5°C) for 48 h using Tris citrate glucose based extender. We detected semen quality parameters [volume, mass activity, pH, sperm concentration, total motility, viability, total sperm abnormality, and plasma membrane, acrosomal and nuclear integrities], biochemical profiles [aspartate amino transferase (AST), alanine amino transferase (ALT) and total cholesterol], and oxidative stress markers [total antioxidant capacity (TAC) and malondialdehyde (MDA)] during monsoon and dry seasons. Results: Semen quality parameters significantly differed between seasons (P<0.05) and among storage periods (P<0.05). Volume, pH, mass activity, motility, viability, acrosomal, plasma membrane and nuclear integrities, and TAC were significantly higher (P<0.05). Sperm concentration, sperm abnormalities, MDA, AST, ALT and total cholesterol were significantly lower in fresh semen of monsoon than dry season (P<0.05). Motility, viability, acrosomal, plasma membrane and nuclear integrities, and TAC were significantly decreased (P<0.05) while sperm abnormality, AST, ALT, total cholesterol and MDA were significantly increased as liquid semen storage period advanced (P<0.05). Conclusions: Monsoon season has higher beneficial effects on semen quality profiles and liquid stored semen remained usable for upto 48 h. Good quality ejaculates with higher TAC and lower MDA can be cryopreserved and will be used for artificial insemination

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Not AvailableThe present study was undertaken to assess the effect of bovine serum albumin (BSA) on sperm motility, viability, total spermabnormality, acrosomal and plasmamembrane integrity. A total of 30 ejaculates were collected from mithun bulls and semen was split into five equal aliquots, diluted with the TEYC extender. Group 1: semen without additives (control), group 2 to group 4: semen was diluted with 5 mg/ml, 10 mg/ml and 20 mg/ml of BSA, respectively. These seminal parameters were assessed at 5oC for 0, 6, 12, 24 and 30 h of incubation. Inclusion of BSA into diluent resulted in significant (P <0.05) decrease in percentages of dead spermatozoa, abnormal spermatozoa and acrosomal abnormalities at different hours of storage periods as compared with control group.Additionally, BSAat 5mg/ml has significant (p< 0.05) improvement in quality of semen than BSA at 10 mg/ml and 20 mg/ml stored in in-vitro for up to 30 h. It was concluded that the possible protective effects of BSA on sperm parameters may be due to the prevention of lipid peroxidation.Not Availabl

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Not AvailableThe present study was conducted to assess the effect of replacement of cattle bull seminal plasma with that of mithun bull on seminal parameters of mithun bulls. After collection, the semen samples were divided into group 1 (control): without addition of heterogenous seminal plasma; group 2 to group 5: mithun semen with half and full replacement of good quality cattle seminal plasma and mithun semen with half and full replacement of poor quality cattle seminal plasma, respectively. Individual motility, livability, total sperm abnormality, acrosomal, plasma membrane and nuclear integrity were assessed. The result revealed that there was no significant difference between full and half seminal plasma replacement in both good and poor quality seminal plasma, but the seminal traits of half seminal plasma replacement has nonsignificantly higher value than full seminal plasma replacement. Comparison between the control, half and full seminal plasma replacement of good and half and full seminal plasma replacement of poor quality semen revealed a significant difference.Not Availabl