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Effect of Pyriproxyfen, a Malaria Vector Larvicide, on the Growth and Mortality of Vannamei Shrimp Putri, Sriana; Setyaningrum, Endah; Farisi, Salman
Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) Vol. 10 No. 1 (2023)
Publisher : Department of Biology Faculty of Mathematics and Natural Sciences Universitas Lampung in collaboration with The Indonesian Association of Biology (PBI) Lampung Branch.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jbekh.v10i1.258

Abstract

Anopheles mosquito shared a breeding site with the vannamei shrimp (Litopenaeus vannamei). Anopheles mosquito larvae commonly live in both stagnant fresh and brackish water. The potential breeding habitat of Anopheles mosquito larvae may be rice fields, pools or ponds, swamps, ditches, and slow-current streams. One of the effective strategies to control malaria is to apply chemical insecticides. Pyriproxifen is a larvicide that contains juvenile hormone-like compounds. Juvenile hormone-like compounds can affect mosquito morphogenesis, characterized by the failure of the larvae to develop into pupae. With a completely randomized design, the shrimp fry was divided into 4 groups,  6 repetitions, 20 individuals each. Shrimp fry in each experimental unit was placed and maintained in plastic jars containing 2.5 L of brackish water. The results showed that the insect growth regulator (IGR) with the active ingredient pyriproxyfen at various concentrations had no significant effect on the growth, mortality, and survival of vannamei shrimp fry.  It can be concluded therefore that pyriproxifen larvicide was safe to be used for controlling malaria mosquito vectors in hatcheries and breeding ponds of vannamei shrimp.
Water Quality Analysis Based on Diversity and Abundance of Plankton in the Way Besai River, North Lampung: Analisis Kualitas Air Berdasarkan Keanekaragaman dan Kelimpahan Plankton di Sungai Way Besai Lampung Utara Nazma, Anya Khalisza Putri; Tugiyono, Tugiyono; Farisi, Salman; Susanto, Gregorius Nugroho
Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) Vol. 12 No. 1 (2025)
Publisher : Department of Biology Faculty of Mathematics and Natural Sciences Universitas Lampung in collaboration with The Indonesian Association of Biology (PBI) Lampung Branch.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jbekh.v12i1.407

Abstract

Plankton is one of the aquatic biota that can act as a bioindicator of Water because it is susceptible to changes in the quality of the Water where it lives. The Way Besai River is in Dwikora Village, Bukit Kemuning District, North Lampung Regency. This study aimed to determine the water quality of the Way Besai River based on the diversity and abundance of plankton as a bioindicator of Water and to determine the relationship between the plankton community structure and water quality parameters. This study was conducted in November-December 2024. Sampling was performed using a survey method with 6 (six) spots, which were then identified and calculated using the Sedgewick-Rafter method. Based on the analysis of plankton abundance and diversity, it is known that the Way Besai River is moderately polluted, and there is a significant relationship between the plankton community structure and water quality parameters.
Efek Kuning Telur Terhadap Motilitas Sperma Ikan Lukas (Puntius bramoides Val) Pascakriopreservasi Pertiwi, Primasari; Abinawanto; Farisi, Salman
BULLET : Jurnal Multidisiplin Ilmu Vol. 3 No. 1 (2024): BULLET : Jurnal Multidisiplin Ilmu
Publisher : CV. Multi Kreasi Media

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The research aims to determine the effect of several concentrations of egg yolk as an effective natural cryoprotectant for cryopreservation and to analyze the quality of lukas fish spermatozoa (Puntius bramoides Val) 48 hours after cryopreservation. This research used a 9 treatments and 4 replications. The concentration of egg yolk used as a cryoprotectant was 0% (negative control), 5%, 7%, 9%, 11%, 13%, 15%, 17%, and 1% Carboxymethyl Cellulose (CMC) was used as a positive control. The results showed that the use of several concentrations of egg yolk as a natural extracellular cryoprotectant was able to significantly influence (P<0.005) the quality of Lukas fish spermatozoa 48 hours after cryopreservation. The use of egg yolk concentration of 9% is the optimum concentration in maintaining the motility of Lukas fish spermatozoa with the average percentage obtained each being 80.45 ± 0.93%.
Leader-Member Exchange and Employee Performance: The Mediating Role of Work Engagement and Job Satisfaction Siswadi, Yudi; Farisi, Salman; Arif, Muhammad; Astuti, Rini
International Journal of Business Economics (IJBE) Vol 6, No 2 (2025): MARCH - AUGUST 2025
Publisher : Fakultas Ekonomi dan Bisnis, Universitas Muhammadiyah Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/ijbe.v6i2.23542

Abstract

Purpose — This study investigates and evaluates the direct or indirect effects of leader-member exchange on work engagement and job satisfaction on employee performance.Methodology — This study adopts a causal approach, examining causal relationships between variables. It involved 200 employees from a Pharmaceutical Company in Medan, North Sumatra, Indonesia, with a sample size of 197 employees. Questionnaires were employed in this study's data collection process. Smartpls (Partial Least Squares) 3.0 software was utilised for structural equation modelling in statistical analysis.Findings — The findings of this study reveal that direct leader-member exchange, work engagement, and job satisfaction significantly affect employee performance. Leader-member exchange significantly affects performance through work engagement and employee job satisfaction at the Pharmaceutical Company in Medan, North Sumatra, Indonesia.Originality/Novelty — This study's novelty highlights the mediating role of work engagement and job satisfaction in the relationship between Leader-Member Exchange (LMX) and employee Performance improvement, providing new insights into such psychological mechanisms.Implications — This research provides information for the Pharmaceutical Company in Medan, North Sumatra, Indonesia, and related parties to improve employee performance by increasing job satisfaction and work engagement and improving existing leadership to provide employee comfort.
Uji Daya Antibakteri Isolat Bakteri Asam Laktat dari Kefir terhadap Bacillus sp. dan Escherichia Coli Ningsih, Agung Setia; Ekowati, Christina Nugroho; Sumard, Sumard; Farisi, Salman
Biosfer: Jurnal Tadris Biologi Vol 9 No 2 (2018): Biosfer: Jurnal Tadris Biologi
Publisher : UNIVERSITAS ISLAM NEGERI RADEN INTAN LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/biosfer.v9i2.2608

Abstract

Penelitian ini bertujuan untuk mengetahui daya antibakteri  yang dihasilkan oleh isolat bakteri asam laktat dari kefir susu sapi dan susu kedelai terhadap Escherichia coli. Penelitian ini dilakukan dalam empat tahapan yaitu isolasi dan identifikasi BAL kefir, produksi zat antibakteri dari isolat, menguji daya hambat isolat antibakteri BAL terhadap Escherichia coli. Hasil penelitian menunjukan Keenam Isolat bakteri asam laktat dari kefir susu kedelai dan kefir susu sapi mampu menghambat pertumbuhan Escherichia coli dalam kondisi asam dan netral. Dalam kondisi asam luas zona hambat KE1-KE3 berturut-turut adalah 3,51; 2,93; 2,66 dan SA1-SA3 adalah 1,83; 2,46; 2,46. Dalam kondisi netral zona hambat KE1-KE3 berturut-turut adalah 1,59; 2,33; 1,99 dan SA1-SA2 adalah 1,49; 2,49; 2,39.
Analisis Indeks Kualitas Air di Analisis Indeks Kualitas Air di Sungai Bako Bandar Lampung Hutauruk, Elisa Marcelina; Tugiyono, Tugiyono; Farisi, Salman
Filogeni: Jurnal Mahasiswa Biologi Vol 5 No 2 (2025): Mei-Agustus
Publisher : Program Studi Biologi Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/filogeni.v5i2.56653

Abstract

Sungai merupakan jalur pengaliran air alami atau buatan dari hulu hingga hilir. Kualitas air sungai dapat mengalami perubahan dipengaruhi oleh aktivitas manusia. Sungai Bako merupakan sungai yang melintasi pemukiman padat penduduk. Meningkatnya aktivitas manusia, perubahan pola pemanfaatan lahan, dan semakin beragamnya pola hidup masyarakat yang menghasilkan limbah domestik menjadikan beban pencemar di sungai semakin meningkat. Tujuan dari penelitian ini adalah untuk mengetahui Indeks Kualitas Air (IKA) berdasarkan parameter fisika, kimia, dan biologi. Titik pengambilan sampel berada di Sungai Bako pada hulu, tengah, dan hilir sungai. Sampel air dianalisis dengan delapan parameter, yaitu pH, DO, BOD, COD, TSS, nitrat, T-fosfat, dan Escherichia coli. Berdasarkan hasil perhitungan Indeks Pencemaran (IP), Sungai Bako pada 3 stasiun penelitian termasuk dalam kategori tercemar ringan dengan nilai IP pada masing-masing stasiun yaitu 2,075 (stasiun 1), 2,075 (stasiun 2), dan 2,376 (stasiun 3). Hasil analisis nilai IKA pada Sungai Bako yaitu tercemar sedang dengan nilai sebesar 50.
Improving Employee Productivity: Compensation, Work Discipline, and Motivation Hayati, Nur; Farisi, Salman
Jurnal Akuntansi, Manajemen dan Ilmu Ekonomi (Jasmien) Vol. 5 No. 03 (2025): Vol. 5 No. 03 (2025): Jurnal Akuntansi, Manajemen dan Ilmu Ekonomi (Jasmien)
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jasmien.v5i03.1436

Abstract

The purpose of this study is to determine the effect of compensation on employee productivity at the Medan City MSME Cooperative Office, the effect of work discipline on employee productivity at the Medan City MSME Cooperative Office and the effect of motivation on employee productivity at the Medan City MSME Cooperative Office as well as to determine the influence of compensation, work discipline and motivation on employee productivity at the Medan City MSME Cooperative Office. The method in this study using a quantitative approach. The population in this study were all employees of the Medan City UMKM Cooperative Service, totaling 40 people. The sample in this study was sampled using the saturated sample method where all members of the population were sampled as many as 40 people. Data collection techniques in this study used questionnaires or questionnaires distributed to employees of the Medan City UMKM Cooperative Service. The data technique in this study used the calssical assumption test, multiple linear regression, hypothesis testing (t test and F test), and the coefficient of determination. Data processing in this study uses the application Statistical Product and Service Solutions (SPSS) 22.0 for windows. The results of this study show that in terms of compensation, work discipline and motivation, each have a significant effect on the productivity of employees of the Medan City MSME Cooperative Office and simultaneously compensation, work discipline and motivation have an effect on employee productivity at the Medan City MSME Cooperative Office. Further research can add other variables such as leadership, organizational culture, or work-life balance to gain a broader understanding of the factors that affect employee productivity. .
Pelatihan Pembuatan Pestisida Alami dengan Metode Maserasi bagi Staf Kebun Raya Liwa Kabupaten Lampung Barat, Provinsi Lampung Farisi, Salman; Yulianty, Yulianty; Linirin Widiastuti, Endang; Azizah, Enur
Jurnal Abdi Masyarakat Indonesia Vol 5 No 5 (2025): JAMSI - September 2025
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.2073

Abstract

Indonesia merupakan salah satu negara dengan keanekaragaman tumbuhan yang tinggi. Potensi tumbuhan yang ada belum diberdayakan secara maksimal oleh masyarakat, khususnya di Kebun Raya Liwa. Banyak tumbuhan yang memiliki potensi sebagai tumbuhan obat, namun penggunaan sebagai pestisida alami belum banyak digali lebih lanjut. Keterlibatan staf yang ada di KRL sangat diperlukan untuk memanfaatkan secara langsung tumbuhan yang ada untuk membuat pestisida alami. Pestisida alami ini dapat digunakan untuk mengendalikan penyakit yang disebabkan oleh jamur (fungisida), mengendalikan gulma (herbisida), maupun mengendalikan tikus (rodentisida) dan lain sebagainya. Oleh sebab itu perlu dilakukan pelatihan untuk membuat pestisida alami bagi staf Kebun Raya Liwa. Kegiatan Pengabdian Kepada Masyarakat (PKM) ini bertujuan untuk meningkatkan pengetahuan dan ketrampilan dalam pembuatan pestisida alami dengan metode maserasi. Hasil dari pelatihan ini menunjukkan ada peningkatan pengetahuan dan keterampilan dengan peningkatran nilai post-test sebesar 29 poin, perentase peningkatan sebesar 64,44%. Hasil dari kegiatan Pengabdian Kepada Masyarakat ini staf Kebun Raya Liwa dapat membuat pestisida alami dan dapat menggunakan pestisida alami untuk mengendalikan organisme pengganggu yang ada di Kebun Raya Liwa.
Training on Making Compost Fertilizer from Animal Manure in Sindang Anom Village, East Lampung Pertiwi, Primasari; Azizah, Enur; Suratman, Suratman; Farisi, Salman
Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN Vol. 5 No. 3 (2024)
Publisher : Faculty of Mathematics and Natural Sciences - Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpkmt.v5i3.183

Abstract

Masyarakat Desa Sindang Anom umumnya berprofesi sebagai peternak sapi sekaligus petani. Berdasarkan data kelembagaan petani, Desa Sindang Anom terdiri dari 1 Gapoktan dengan 35 Kelompok Tani. Usaha peternakan sapi yang dikelola masyarakat menghasilkan limbah kotoran. Limbah kotoran hewan yang dihasilkan belum diolah secara maksimal oleh para peternak dan Masyarakat lainnya. Kendala yang dihadapi oleh masyarakat adalah minimnya informasi mengenai teknik pengolahan kotoran hewan menjadi pupuk kompos. Tujuan dilaksanakannya kegiatan PKM ini adalah untuk meningkatkan pengetahuan dan keterampilan masyarakat tentang pembuatan pupuk kompos dari kotoran hewan. Kegiatan PKM dilaksanakan meliputi 2 tahap, tahap pertama yaitu penyampaian materi secara ceramah dan diskusi, tahap kedua berupa praktek/demonstrasi pembuatan pupuk kompos dari kotoran hewan. Hasil evaluasi menunjukkan pre-test peserta rata-rata 3,9 sedangkan post-test rata-rata adalah 7,9. Kesimpulan dari kegiatan ini adalah pengetahuan dan keterampilan Masyarakat di Desa Sindang Anom meningkat, khususnya tentang metode pengolahan pupuk kompos dari kotoran hewan.
Faktor Determinan Return on Asset pada Perusahaan Otomotif Yang Terdaftar di Bursa Efek Indonesia Pulungan, Khairul Anwar; Irsan, Muhammad; Farisi, Salman
Owner : Riset dan Jurnal Akuntansi Vol. 8 No. 4 (2024): Artikel Research Oktober 2024
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/owner.v8i4.2411

Abstract

Financial performance serves as information for investors and policymakers who support the implementation of company operations. Financial performance can be measured using financial ratios. This research aims to (1) find out and analyse the effect of the Current Ratio on Return on Asset, (2) know and analyse the effect of Debt to Assets Ratio on Return on Asset, (3) determine and analyse the effect of Total Asset Turnover on Return on Asset. This study uses a sample of automotive sub-sector companies listed on the IDX during the period 2016-2022. There are 12 state-owned companies listed on the IDX. A total of 9 automotive subsector companies were used as samples in this study. The sampling technique used in this research is purposive sampling. Data collection techniques use documentation techniques with secondary data. Data analysis technique The results showed that the Current Ratio (CR) variable partially did not have a significant effect on Return on Assets (ROA). The current Ratio (CR) variable partially has no significant effect on Return on Asset (ROA). The debt to asset ratio (DAR) variable is partially variable and has a negative and significant effect on return on asset (ROA). Variable Total Asset Turnover (TATO) partially has a positive and significant effect on Return on Asset (ROA). Based on the F test, the obtained variable Current Ratio (CR), Debt to Asset Ratio (DAR), and Total Asset Turnover (TATO) variables simultaneously have a significant effect on Return on Asset (ROA) have a significant effect on Return on Asset (ROA).