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Irwan Effendi
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Physics Social Sciences Veterinary Other

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kemampuan biodegradasi bakteri selulolitik pada ekosistem mangrove Fiki Harjuni; Nursyirwani .; Irwan Effendi
Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan Vol 8, No 1 (2020): Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan
Publisher : UNIVERSITAS MUHAMMADIYAH PONTIANAK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (396.835 KB) | DOI: 10.29406/jr.v8i1.1519

Abstract

Bakteri selulolitik merupakan bakteri yang memiliki kemampuan menghidrolisis kompleks selulosa menjadi oligosakarida yang lebih kecil dan akhirnya menjadi glukosa dimana bakteri selulolitik telah banyak dikaji potensinya dalam memproduksi enzim selulase yang telah dimanfaatkan dalam berbagai bidang, seperti pada bidang pertanian, perikanan, industri dan kedokteran . Tujuan dari penelitian ini adalah untuk mendapatkan miroba selulolitik, mengetahui waktu optimum produksi enzim selulolitik dan bagaimana kemampuan degradasi bakteri selulolitik terpilih terhadap serasah mangrove. Penelitian ini dilaksanakan pada bulan Februari sampai Juni 2019 di Laboratorium Mirobiologi Laut Fakultas Perikanan dan Kelautan Universitas Riau. Metode yang digunakan dalam penelitian ini adalah menggunakan metode survei dan dilanjutkan dengan analisis di laboratorium.  Data diperoleh melalui pengamatan dan pengukuran parameter lingkungan di lapangan, dan analisis sampel di laboratorium.Hasil penelitian menunjukkan bahwa isolasi, seleksi (Identifikasi mikroba pada sedimen hutan mangrove Stasiun Kelautan Dumai), diperoleh 24 isolat yang memiliki kemampuan tumbuh dalam media yang mengandung CMC dengan aktifitas seluloliti tertinggi terdapat pada isolat BS.ST2.8. Hasil karakteristik isolat bakteri selulolitik secara fenotip dan genotip diketahui bahwa ketiga isolat tersebut adalah B. toyonensis. Enzim selulase terbanyak dihasilkan oleh isolat bakteri BS.ST2.8 terjadi pada jam ke -78 setelah inkubasi. Dari hasil uji lebih lanjut dengan menggunakan beberapa dosis enzim selulase isolat BS.ST2.8 terhadap substrat serasah mangrove diketahui bahwa secara umum dapat mendegradasi serat kasar pada serasah mangrove pada dosis 50%  penurunan fraksi serat NDF, ADF, selulosa dan hemiselulosa.
EFEKTIVITAS PENAMBAHAN SUPLEMEN HERBAL PADA PELLET TERHADAP PERTUMBUHAN DAN KELULUSHIDUPAN IKAN PATIN (Pangasius hypophthalmus) Ronal Kurniawan; Henni Syawal; Irwan Effendi
Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan Vol 8, No 1 (2020): Jurnal Ruaya : Jurnal Penelitian dan Kajian Ilmu Perikanan dan Kelautan
Publisher : UNIVERSITAS MUHAMMADIYAH PONTIANAK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.14 KB) | DOI: 10.29406/jr.v8i1.1613

Abstract

Penggunaan tumbuhan sebagai alternatif suplemen pakan memiliki kelebihan, salah satunya bersifat bio-degradable dan ramah lingkungan, serta mudah ditemukan di alam, seperti kunyit, temulawak, dan kencur. Tumbuhan ini bersifat antibakteri dan antimikroba, serta meningkatkan laju pertumbuhan dan sistem imun ikan. Tujuan penelitian adalah untuk mengetahui efektivitas dari penambahan suplemen herbal pada pakan buatan dalam meningkatkan laju pertumbuhan dan kelulushidupan ikan patin. Penelitian ini dilaksanakan pada bulan Juni s/d Agustus 2019, di Waduk Fakultas Perikanan dan Kelautan Universitas Riau, Pekanbaru. Metode yang digunakan adalah metode eksperimen dengan menerapkan rancangan acak lengkap (RAL) dengan empat perlakuan, yaitu P0 (kontrol), P1 (dosis suplemen 100 mL/kg pakan), P2 (200 mL/kg), P3 (300 mL/kg). Ikan dipelihara dengan padat tebar 75 ekor/m3, panjang 7 cm dan bobot 6 g, serta dipelihara selama 60 hari. Hasil penelitian menunjukkan bahwa pemberian pakan buatan dengan penambahan suplemen herbal mampu meningkatkan pertumbuhan dan tingkat kelulushidupan ikan patin. Dosis pemberian suplemen herbal sebesar 200 mL/kg pakan menghasilkan laju pertumbuhan dan tingkat kelulushidupan ikan patin terbaik, menghasilkan pertumbuhan bobot mutlak sebesar 119,08 g, laju pertumbuhan spesifik 4,86%/hari, panjang mutlak 15,45 cm, konversi pakan 1,21, efisiensi pakan 82,93% dan tingkat kelulushidupan 100%. Kualitas air selama penelitian berada dalam kisaran yang mendukung untuk pertumbuhan ikan patin, yaitu suhu berkisar antara 26,9-30,2oC, oksigen terlarut berkisar antara 4,3-6,1 mg/L, dan pH berkisar antara 6,1-6.8.
Utilization of Sago Liquid Waste Organic Fertilizer as a Culture Medium for Chlorella sp. Irwan Effendi; Mega Novia Putri; Ulfi Laili Astika; Ronal Kurniawan
Jurnal Natur Indonesia Vol 21, No 1 (2023): April 2023
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.1.55-62

Abstract

Chlorella sp. is a microalga that can grow and develop in wastewater media, including sago liquid waste that is not utilized and becomes a pollution material. This study aims to determine the utilization of sago liquid waste organic fertilizer on the growth of Chlorella sp. This research was conducted in February 2023 at the Marine Biotechnology Laboratory, Faculty of Fisheries and Marine Sciences, Riau University. The method used was the experimental method, by applying a complete randomized design (CRD) with four treatments and three replicates. The treatments were as follows: T0 (control), T1 (150 ml sago liquid waste), T2 (200 ml), and T3 (250 ml). The initial density of Chlorella sp. was 250 x103 cells/ml, and cell abundance observations were made for 14 days. The parameters observed were cell abundance, specific growth rate, and water quality (temperature and pH). The results showed that the utilization of sago liquid waste affected the abundance of Chlorella sp. 150 ml concentration and gave the best results on cell abundance of 233.33 x103 cells/ml with the peak population occurring on day 9. Water quality during the study was still in the normal range and can be tolerated for the growth of Chlorella sp, namely temperature ranging from 26-31o C and pH 6.2-8.0
Solusi Persoalan Kemiskinan Di Kabupaten Rokan Hulu Arrafiqur Rahman; Irwan Effendi; Lufita Nur Alfiah; Purwantoro
Jurnal Ilmiah Cano Ekonomos Vol. 9 No. 1 (2020): Jurnal Ilmiah Cano Ekonomos
Publisher : Fakultas Ekonomi Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (385.848 KB)

Abstract

Grafik angka kemiskinan di Kabupaten Rokan Hulu dalam sepuluh tahun terakhir hampir tidak pernah menunjukkan penurunan yang signifikan. Tahun 2019 jumlah penduduk miskin Rokan Hulu nomor satu terbanyak di Provinsi Riau dengan angka sebesar 72,28 ribu jiwa. Artikel ini membahas tentang berbagai solusi terkait dengan masalah kemiskinan di Rokan Hulu, secara spesifik artikel ini adalah merupakan hasil dari Diskusi Publik yang dilakukan oleh Universitas Pasir Pengaraian tentang persoalan kemiskinan di Rokan Hulu. Data primer dalam artikel ini diperoleh melalui Focus Group Discussion (FGD) melalui kegiatan diskusi public, dengan informen sebanyak 18 orang dari berbagai kalangan, meliputi tokoh masyarakat, akademisi, birokrat, unsur pemerintah daerah, lembaga legislative, lembaga adat melayu, organisasi masyarakat, pemuda dan profesi, dan lain-lain. Selain itu pandangan sikap beberapa komentator di berbagai media setelah kegiatan diskusi dilakukan juga dijadikan sebagai data primer dalam tulisan ini. Selanjutnya sikap dan pandangan informen di analisis dengan pendekatan thematic analysis menggunakan sofwer NVivo 12 Plus. Berdasarkan hasil analisis, disimpulkan bahwa secara umum solusi penanggulangan kemiskina di Rokan Hulu terdiri dari tiga poin mindmap, yaitu: 1). Solusi terkait data, 2). Solusi terkait program cepat, dan 3). Solusi kebijakan untuk jangka panjang. Berdasarkan kesimpulan tersebut pemerintah daerah Rokan Hulu pada dasarnya telah mendapatkan rambu-rambu solusi yang akan dilakukan, selanjutnya diperlukan perumusan langkah teknis yang konkrit dan komprehensif terkait dengan rencana pelaksanaan dari setiap solusi yang ditawarkan.
Legal Protection for Whistleblowers of Corruption Crime Bring to Fairness Irwan Effendi
Sociological Jurisprudence Journal Vol. 7 No. 1 (2024)
Publisher : Fakultas Hukum, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/scj.7.1.2024.31-39

Abstract

The legal protection provided to the whistleblower is still ineffective and far from feeling safe and perfect and in the event that the complainant of a crime still often gets criminalized and discriminated against, the legal protection provided is still not sufficient to fulfill the sense of justice of what the complainant has given. This research uses normative legal research. The formulation of the problem in this study (1) Does the concept of legal protection for whistleblowers as contained in Law Number 13 of 2006 concerning amendments to Law Number 31 of 2014 regarding sex workers fulfill a sense of justice? and (2) What is the expected strategy in order to strengthen the regulation of legal protection for reporters of criminal acts of corruption in a just manner?. The conclusion of this study when viewed from the theory put forward by Lawrence M. Friedman which states that the success or failure of law enforcement is closely related to the legal system. firstly, at the level of substance, the existing regulations are still not sufficient so that more specific rules are needed to regulate legal protection for whistleblowers, the structure whose implementation is still in contact with authorities with other law enforcement officers, the culture of fulfilling the rights of those who report corruption crimes that are In practice, there is still an assessment and fulfillment of rights for reporting corruption crimes and the first strategy is providing education, information about legal protection by law enforcement officers to be given to the public in order to create legal awareness from the community.
PERTANGGUNGJAWABAN PIDANA BAGI PELAKU TINDAK PIDANA PEMBUNUHAN DISERTAI MUTILASI Mochammad Sukedi; Irwan Effendi
JOURNAL OF LAW AND NATION Vol. 3 No. 2 (2024): MEI
Publisher : INTELIGENSIA MEDIA

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

Abstract

The crime of murder is a criminal act of a material nature that awaits the consequences of the action taken, namely that the victim must die. The crime of murder accompanied by mutliation is a crime that is considered abnormal and is carried out cruelly by the perpetrator by cutting off parts of the victim's body. To determine the responsibility of the perpetrator of the crime of murder accompanied by mutilation, the condition of the perpetrator must first be known when committing the crime, which will then determine the perpetrator's ability to take responsibility for the actions he has committed. This research uses a normative legal research method by reviewing and analyzing secondary data containing primary legal materials, secondary legal materials and tertiary legal materials. Then a statutory approach and a case approach are taken. After the data is collected, it is then described in a normative-descriptive manner to explain the problem being studied. The results of the research and discussion regarding the regulation of criminal acts of murder accompanied by mutilation in positive law in Indonesia, crimes against life are regulated in Articles 338-340 of the Criminal Code, however, these acts are not regulated at all, because these criminal acts are crimes that are classified as abnormal and are committed with so heinous that special rules are needed to regulate this action. Furthermore, regarding the criminal responsibility of perpetrators of murder accompanied by mutilation, their health and mental health must be checked first in carrying out the criminal act so that it will have an impact on their ability to be responsible if based on Article 44 of the Criminal Code which regulates inability to take responsibility, but if they are deemed not to have fulfilled this article then the perpetrator can be held accountable.
PERLINDUNGAN HUKUM TERHADAP SAKSI PELAKU (JUSTICE COLLABORATOR) DALAM TINDAK PIDANA KORUPSI Irwan Effendi; Ida Ayu Eka Putri Yuliandari
Jurnal Hukum Saraswati Vol 6 No 2 (2024): JHS SEPTEMBER 2024
Publisher : Faculty of Law, Mahasaraswati University, Denpasar

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

Abstract

Guarantees for the implementation of certain rights regulated in article PSK Law there is no explanation of how to implement the regulations and provide the rights listed and contained in article 5, resulting in witnesses unwilling and unwilling to give statements before the court. Formulation of the problem (1) how is the legal protection for the witnesses of the perpetrators (Justice Collaborator) in corruption? (2) What is the criminal sanction given to the witnesses of the perpetrators (Justice Collaborator) against criminal acts of corruption? In writing this thesis, the legal research used is normative legal research. Using analysis of legal interpretation in order to answer the problems raised. As for the legal protection for witnesses of the Justice Collaborator against corruption, it is deemed necessary, considering that to guarantee the security of the perpetrators themselves while giving their testimony and testimony in court. Criminal sanctions are given to witnesses of the Justice Collaborator against corruption, namely the Judge may consider the conviction of a criminal conviction for conditional probation and / or imprisonment in the form of the lightest imprisonment among other defendants found guilty, as well as providing special treatment for witnesses of the offender cooperate and get special handling also in detention, file inspection and security while giving testimony. Protection for witnesses of perpetrators can be seen as very necessary, given to guarantee the security of the perpetrators themselves while providing information and testimony in court. Judges may consider convicting them with consideration of imposing special conditional probation penalties and / or imposing penalties in the form of the lightest imprisonment among other defendants who are proven guilty and provide special treatment.
Effect of Different Salinity on the Growth of Chlorella sp in Laboratory Scale Culture Irwan Effendi; Mega Novia Putri; Ulfi Laili Astika; Ronal Kurniawan
Jurnal Natur Indonesia Vol. 22 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.1.21-27

Abstract

This study aimed to determine the optimal salinity in increasing the growth rate of Chlorella sp in laboratory scale culture. This research was conducted in July 2023 at the Marine Biotechnology Laboratory, Faculty of Fisheries and Marine Sciences, Universitas Riau. The experimental method was applied using a complete randomized design (CRD) with four treatments and three replicates. The treatments were as follows: T0 (control), T1 (25 ppt salinity), T2 (30 ppt salinity), and T3 (35 ppt salinity). The initial density of Chlorella sp was 250x103 cells/mL, and cell abundance observations were carried out for 14 days. The parameters observed were cell abundance, specific growth rate, and water quality (temperature and pH). The results showed that different salinity influenced the growth of Chlorella sp. 35 ppt salinity gave the best results on cell abundance of 266.66x104 cells/mL, with peak population occurring on day 10. Water quality during the study was still in the normal range and can be tolerated for the growth of Chlorella sp, and the temperature ranged from 25-31oC and pH 6.4-8.0
Reduction of Dispersant Pollutant (Linear Alkylbenzene Sulfonate) by Mangrove Plant (Rhizophora mucronata) Syahril Nedi; Irwan Effendi; Afrizal Tanjung; Elizal Elizal
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Linear alkylbenzene sulfonate (LAS) is the main component of dispersants that function as cleaners of various materials. The increasing use of LAS causes this compound to dominantly pollute coastal waters. Phytoremediation is the most environmentally safe alternative to physical and chemical methods. One of the potential plants as a phytoremediator is Rhizophora mucronata. This research is an experiment as an application of LAS pollutant control by R.mucronata plants in waters. After acclimatization and preliminary tests, the implementation of LAS phytoremediation tests by R. mucronata plants in seawater media was carried out at concentrations of A1: 25 mg/L, A2: 100 mg/L, A3: 175 mg/L, A4: 250 mg/L, and A5: 325 mg/L and control (Control without plants) as a simulation of the presence of pollutants in coastal waters. The method used was a completely randomized design (CRD) with one treatment and 3 replications. The reduction of LAS concentration in the test media and its effect on R.mucronata leaf chlorophyll and dissolved oxygen were analyzed at week 2 to week 4. The analysis results showed that LAS compounds could be reduced to 91.48% at week 2 and 97.40% at week 4. Plant Water quality parameters (dissolved oxygen, temperature and pH) were measured daily. Based on the study results, LAS can be reduced by R.mucronata plants 87-90.4% in week 2 and 95.1-97.4% in week 4. LAS exclusion by plants had a significant impact on the reduction of leaf chlorophyll content until week 4. LAS reduction by R.mucronata in the media can increase dissolved oxygen content as an indication of improved water quality. R.mucronata plants can be used as an alternative to control LAS pollution in waters
Utilization of Sago Liquid Waste Organic Fertilizer as a Culture Medium for Chlorella sp. Irwan Effendi; Mega Novia Putri; Ulfi Laili Astika; Ronal Kurniawan
Jurnal Natur Indonesia Vol. 21 No. 1 (2023): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Chlorella sp. is a microalga that can grow and develop in wastewater media, including sago liquid waste that is not utilized and becomes a pollution material. This study aims to determine the utilization of sago liquid waste organic fertilizer on the growth of Chlorella sp. This research was conducted in February 2023 at the Marine Biotechnology Laboratory, Faculty of Fisheries and Marine Sciences, Riau University. The method used was the experimental method, by applying a complete randomized design (CRD) with four treatments and three replicates. The treatments were as follows: T0 (control), T1 (150 ml sago liquid waste), T2 (200 ml), and T3 (250 ml). The initial density of Chlorella sp. was 250 x103 cells/ml, and cell abundance observations were made for 14 days. The parameters observed were cell abundance, specific growth rate, and water quality (temperature and pH). The results showed that the utilization of sago liquid waste affected the abundance of Chlorella sp. 150 ml concentration and gave the best results on cell abundance of 233.33 x103 cells/ml with the peak population occurring on day 9. Water quality during the study was still in the normal range and can be tolerated for the growth of Chlorella sp, namely temperature ranging from 26-31o C and pH 6.2-8.0
Co-Authors Afrizal Tanjung Andika Rismayanti Hadi Aqil Fikar Rivai Arrafiqur Rahman Batubara, Ummi Mardhiah Bintal Amin Cahyani Fitrah Tanjung Christine M Situmeang Daulay, Anita Diah Permata Sari Dessy Yoswaty Desy Mutia Sari Dewan Pratama Novian Dimas Gusriansyah Elizal Elizal Elizal, Elizal Eza Buana Fatwa Feliatra Fiki Harjuni Henni Syawal Henny Syawal Henny Syawal HERI SYAHFITRI Ida Ayu Eka Putri Yuliandari Irvina Nurrachmi Joko Samiaji Judita Grace Merry Nainggolan Lufita Nur Alfiah Mardalisa, Mardalisa MARTONO MARTONO Masdini, Alvira Mega Novia Putri Mega Novia Putri Mochammad Sukedi Muhammad Aliv Kusuma Putra Muhammad Arief Wibowo Muhammad Razali Mutia Dhiya Amani Nuraini Nuraini Nursyafni Nanggola Nursyirwani Nursyirwani Nursyirwani, Nursyirwani Okta Rizal Karsih Povy Hutabarat Purwantoro - Rika Permata Sari Rita Wijaya Roiman Pakpahan Ronal Kurniawan Serly Silviyanti Siti Ardiah Soni Sanjaya Sony Sanjaya Sri Wahyuni Suryadi Saputra Syafruddin Nasution Syahril Nedi Syaputry Lita Yanti Tanjung, Cahyani Fitrah Tengku Rany Oktaviany Tri Vani Bernadetha Ginting Tubagus Hasanuddin Ulfi Laili Astika Ulfi Laili Astika Valentina Dian Windarti Windarti Yetti Elfina Yudia Anggun Kirana ZULKIFLI ZULKIFLI