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All Journal e-GIGI e-CliniC LEX CRIMEN JAKPI JSM (Jurnal SIFO Mikroskil) TATANAN Media Penelitian Pendidikan : Jurnal Penelitian dalam Bidang Pendidikan dan Pengajaran Jurnal Manajemen Pendidikan Omni-Akuatika Jurnal Penelitian Pendidikan IPA (JPPIPA) EBSJ SENTRALISASI BALANCE: Jurnal Akuntansi, Auditing dan Keuangan Jurnal PROTEKSI (Proyeksi Teknik Sipil) Jurnal Masyarakat Merdeka (JMM) HIKMAH : JURNAL PENDIDIKAN AGAMA ISLAM Inovasi: Jurnal Ilmiah Ilmu Manajemen Jusikom: Jurnal Sistem Informasi Ilmu Komputer MUKADIMAH: Jurnal Pendidikan, Sejarah, dan Ilmu-ilmu Sosial SOLUSI Jurnal Ilmiah Manajemen Kesatuan Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Promotif Preventif Medical Scope Journal (MSJ) GOVERNANCE: Jurnal Ilmiah Kajian Politik Lokal dan Pembangunan Journal of Research in Social Science and Humanities Action Research Literate (ARL) Manajemen dan Bisnis Jurnal Komputer, Informasi dan Teknologi Jurnal Paradigma Akuntansi Indonesian Accounting Research Journal Modality Journal: International Journal of Linguistics and Literature Aurelia: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia Jurnal Penelitian Ilmu Pendidikan Indonesia Journal Research of Social Science, Economics, and Management Jurnal Pendidikan Indonesia (Japendi) Eduvest - Journal of Universal Studies Innovative: Journal Of Social Science Research TOFEDU: The Future of Education Journal International Journal of Application on Economics and Business Jurnal Pengabdian Masyarakat Ekonomi dan Bisnis Digital The Indonesian Journal of General Medicine Greenation International Journal of Tourism and Management Computer & Science Industrial Engineering Journal Balance: Jurnal Akuntansi, Auditing, dan Keuangan Jurnal Sistem Informasi dan Aplikasi Jurnal Bakti UPPR
Albert Albert
Bina Nusantara University
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Analisis Pengaruh Gaya Belajar Manager dan Gaya Kepemimpinan terhadap Keefektifan Organisasi dengan Kinerja Pegawai sebagai Variabel Intervening (Studi pada PT. UPGRI) Aminingtyas, Septi Andini; Indarto, Indarto; Albert, Albert
Media Penelitian Pendidikan : Jurnal Penelitian dalam Bidang Pendidikan dan Pengajaran Vol 19, No 2 (2025)
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/mpp.v19i2.22402

Abstract

Every employee needs a manager's learning style and a leader's leadership style that can improve employee performance, because with high employee performance, employee performance becomes more focused and organizational goals can be achieved more quickly. This study aims to determine the effect of learning style and leadership style on organizational effectiveness with employee performance as an intervening variable. The type of research used is explanatory research, with a quantitative approach. The sampling technique used is proportionate stratified random sampling, with the determination of the number of samples using the Slovin formula and the number of samples obtained was 78 employees. Data sources were obtained from primary data by distributing questionnaires and secondary data with documentation. This study uses path analysis with the help of SPSS 25.0 software. The results of this study indicate that Manager Learning Style and Leadership Style have a significant effect on Organizational Effectiveness and Employee Performance. Organizational Effectiveness mediates Manager Learning Style and Leadership Style on Employee Performance. The most dominant variable in influencing Organizational Effectiveness and Employee Performance needs to be considered. The variable is Manager Learning Style, with Manager Learning Style, employees feel more motivated and their performance increases.
Perubahan Morfologik dan Kekasaran Permukaan Implan Gigi Ti-Alloy Dipengaruhi oleh Perbedaan Tekanan Sandblasting TiO2 Albert, Albert; Hamidjaja, Beverly C.; Suwandi, Trijani; Andayani, Lia H.
e-GiGi Vol. 14 No. 2 (2026): e-GiGi
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35790/eg.v14i2.60670

Abstract

Abstract: This study aimed to examine the morphological changes and surface roughness of titanium alloy dental implants affected by variations in TiO2 sandblasting pressure in the SA technique. A laboratory experimental study was conducted using 25 titanium alloy samples measured 10x10x2mm began with pre-treatment surface roughness testing. Sandblasting with TiO2 was then performed at different pressures: no sandblasting (negative control), 500 kPa, 600 kPa, 700 kPa, and 800 kPa for 20 seconds, 20 mm distance, and 90° angle. Acid etching with 98% H2SO4 was carried out at 60°C for 60 minutes. Post-treatment surface roughness was measured and morphological changes were observed. The normality test was carried out using the Shapiro-Wilk test, then One-Way ANOVA statistical test was performed to evaluate the significance of the difference in Ra between groups. The results showed that the no-sandblasting group had a significantly lower surface roughness value than the sandblasted groups. SEM results revealed uniform morphology in sandblasted groups, and the 500 kPa group resulted in the deepest and most homogeneous porosity. In conclusion, variations in TiO2 sandblasting pressure affect the morphology and surface roughness of titanium alloy, with 500 kPa providing the most optimal results for roughness and morphology. Keywords: surface roughness; surface morpholog; osseointegration; sandblasting pressure; TiO2    Abstrak: Penelitian ini bertujuan untuk melihat perubahan morfologi dan kekasaran permukaan implan gigi titanium alloy yang dipengaruhi oleh variasi tekanan sandblasting TiO2 dalam teknik SA. Studi eksperimental laboratorium dilakukan menggunakan 25 sampel titanium alloy berukuran 10x10x2 mm, diawali dengan pengujian kekasaran permukaan sebelum perlakuan. Sandblasting TiO2 dilakukan dengan tekanan berbeda-beda: tanpa sandblasting (kontrol negatif), 500 kPa, 600 kPa, 700 kPa, dan 800 kPa selama 20 detik, jarak 20 mm, dan sudut 90°. Acid etching dengan H2SO4 98% dilakukan pada 60°C selama 60 menit. Kekasaran permukaan setelah perlakuan diukur serta perubahan morfologik. Uji normalitas dilakukan dengan uji Shapiro-Wilk, kemudian uji statistik One-Way ANOVA dilakukan untuk melihat signifikansi perbedaan Ra antar kelompok. Hasil penelitian memperlihatkan bahwa kelompok tanpa sandblasting memiliki nilai kekasaran lebih rendah secara bermakna dibandingkan kelompok dengan sandblasting. Hasil SEM menunjukkan morfologi seragam pada kelompok sandblasting, dengan kelompok 500 kPa menghasilkan porositas terdalam dan paling homogen. Simpulan penelitian ini ialah variasi tekanan sandblasting TiO2 memengaruhi morfologi dan kekasaran permukaan titanium alloy, dengan tekanan 500 kPa memberikan hasil paling optimal dalam hal kekasaran dan morfologi. Kata kunci: kekasaran permukaan; morfologi permukaan; osseointegrasi; tekanan sandblasting; TiO2
In Vitro Antibacterial Effectiveness of Stingless Bee Propolis against Infected Breast Cancer Ulcer Manginstar, Christian; Merung, Marselus; Albert, Albert
e-CliniC Vol. 14 No. 1 (2026): e-CliniC
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35790/ecl.v14i1.65682

Abstract

Abstract: Breast cancer is the most common cancer in women and often presents with malignant ulcers prone to infection. These wounds are difficult to manage, especially during chemotherapy, due to polymicrobial colonization and rising antibiotic resistance. Stingless bee propolis, rich in bioactive flavonoids, has shown promising antibacterial properties. This study aimed to evaluate in vitro antibacterial effectiveness of stingless bee propolis against bacteria from breast cancer ulcers. This was an in vitro study conducted at the Poltekkes Kemenkes Manado Medical Laboratory (July 2024–January 2025). Methanol-extracted stingless bee propolis was tested against MRSA and P. aeruginosa using disc diffusion, MIC, and MBC methods. Antibacterial activity was evaluated through inhibition zones and bacterial growth in serial dilutions. The outcomes were analyzed based on inhibition zone diameters and bacterial growth in serial dilutions. The results showed that propolis extract demonstrated antibacterial activity against MRSA and P. aeruginosa, with inhibition zones observed in both disc diffusion and dilution methods. Strong inhibition was noted at concentrations ≥80%, while minimal or no effect occurred below 30%. MIC and MBC were estimated at around 20%. Statistical analysis confirmed a significant dose-response relationship (ANOVA, p 0.0003), with stronger correlation in MRSA (R=0.84; p<0.001) than P. aeruginosa (R=–0.09; p 0.046). The minimum effective concentration was estimated at 32% for MRSA and 37% for P. aeruginosa. In conclusion, stingless bee propolis demonstrated concentration-dependent antibacterial activity against both Gram-positive (MRSA) and Gram-negative (P. aeruginosa) bacteria in vitro, with increased activity observed at higher concentrations. Minimum effective concentrations were 32% for MRSA and 37% for P. aeruginosa, supporting its potential use in treating infected breast cancer ulcers. These findings highlight propolis as a potential natural alternative for infection control and wound healing. Keywords: breast cancer; ulcer; stingless bee; propolis; antibacterial effect
Co-Authors Abda Abda Achmad Noerkhaerin Putra Agus Susanto Alfarizy, Tomy Aminingtyas, Septi Andini Andayani, Lia H. Andini, Lilla Andyka Andyka, Andyka Angkasa, Marco Anita Damajanti Aprih Santoso Arman Husni Aurelia, Clarecia Bonnarty Steven Silalahi Budianto, Justin Chairisni Lubis Chandra, Felixco Chandriani, Casslyn Collins Willim, Zackrey Dewayani , Ery Dewi Apipah, Wulan Djohan, Deva Djohan, Stevannie Duti Volya Elbistian, Kevin Putra Endah Dwi Kusumastuti, Endah Dwi Ermatita - Etty Widyastuti Gawei, Apria Brita Pandohop Girsang, Ermi Hairinsyah, Kesuma Halawa, Misdayanti Hamidjaja, Beverly C. Harahap, Zainy Kholis Muda Hariyanti , Tri Yuli Hartanto, Janssen Yohana Putri Hartati Hartati Haryadi, Nicko Helmy Thendean Hutabarat, Chintya Yohana Putri Hwang, James IKA PUSPA SATRIANNY Indarto Indarto Iratutisisilia, Iratutisisilia Irmawati, B Irwandi Irwandi Ita Fionita Izza, Ainul Jacqueline, Jacqueline Jawari, Irvan Kosasih, Hengky Kridasusila, Andy Kuswardani, Dc Laoli, Tierlin Gustin Kristiani Lestari , Rohmini Indah Liana Susanto Lim, Jennifer Lowins, Leandro Maimori, Romi Manginstar, Christian Manginstar, Christian O. Manik, Rifqa Yolandha Efreymind Marissa, Novaria Marselus A. Merung, Marselus A. Marselus Merung, Marselus Masduki Masduki Meliala, Juli Elisabet Mayen br Muhamad Fajri, Muhamad Mulyono, Jovan Naga , Dali Santun Nasib Nefianto, Tirton Nely Arif Nengsih, Widya Nesia, Yesha Nunung Fajaryani, Nunung Nurhayati Nurhayati Okta Jaya Harmaja Pasaribu, Ester YYN Pranata, Hamdi Pranyoto, Edi Prasetio, Meriyawaty Amelia Prastyaningsih, Nila Robin Robin, Robin Rochimah, Heni Rojuaniah Rojuaniah Rudi Waluyo SAFITRI, CANDRA Sahat Simbolon Saleh, Denny SALMAN FARIS Santoso, Thomas Budi Santy Deasy Siregar Saragih, Saut Pintubipar Sarumi, Rasniah Savitri, Fania Mutiara Sucandra, I Made Agus Kresna Sulistiani Sulistiani, Sulistiani Sunario Megawan Surya Surya SUSANTI Sutanto, Fernando Thamrin Thamrin Tita Elfitasari Tjokorda Gde Agung Senapathi Tommy Setiawan Ruslim, Tommy Setiawan Trijani Suwandi Ugang, Yandi Valerie, Valerie Wahid, Ayi Wedra Aprison Wiguna, Teguh Nusa William, Justin Sebastian Winda Rika Lestari Wizmar, Dickie A. Yani, Tri Endang Yohana Yohana Yuli Budiati Yusmei, Nining Zulfani Sesmiarni