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KAJIAN PENGARUH KECEPATAN AERASI DAN WAKTU INKUBASI TERHADAP KEMAMPUAN KONSORSIA BAKTERI INDIGEN DALAM MENDEGRADASI LIMBAH CAIR KULIT DI INDUSTRI PENYAMAKAN KULIT KOTA MALANG Nugroho Aji Prasetiyo; Hasminar Rachman Fidiastuti
saintifika Vol 17 No 1 (2015)
Publisher : FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.958 KB)

Tujuan dari penelitian adalah untuk: 1) menguji pengaruh kecepatan aerasi terhadap kemampuan konsobakteri mendegradasi limbah cair kulit 2) menguji pengaruh waktu inkubasi terhadap kemampuan bakteri mendegradasi limbah cair. 3) menguji pengaruh interaksi antara kecepatan aerasi dan waktu inkubasi terhadap kemampuan bakteri mendegradasi limbah cair kulit. 4) menguji pengaruh efluen limbah cair kulit pasca perlakuan terhadap kelulushidupan ikan. Penelitian terbagi dalam beberapa tahap, yaitu penelitian pengaruh kecepatan aerasi dan waktu inkubasi terhadap kemampuan bakteri mendegradasi limbah cair kulit, pengaruh efluen limbah cair kulit pasca perlakuan terhadap kelulushidupan ikan. Hasil penelitian menunjukkan bahwa: kecepatan aerasi berpengaruh terhadap kemampuan bakteri mendegradasi limbah cair kulit, waktu inkubasi berpengaruh terhadap kemampuan bakteri mendegradasi limbah cair kulit, interaksi antara kecepatan aerasi dan waktu inkubasi berpengaruh terhadap kemampuan bakteri mendegradasi limbah cair kulit. Hasil uji hayati semua ikan yang diberi efluen limbah cair kulit mengalami kematian karena efluen masih berada di atas baku mutu yang ditetapkan pemerintah, sehingga disimpulkan efluen limbah cair berpengaruh terhadap kelulushidupan ikan.

The Effect of Combination of Cooperative Learning Type STAD With NHT on Problem Solving Ability in Class X Students at High School Elga Farianti Djarawula; Nugroho Aji Prasetiyo; Zuni Mitasari
Journal of Biology Learning Vol 4, No 2 (2022): September 2022
Publisher : Universitas Veteran Bangun Nusantara Sukoharjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/jbl.v4i2.2375

This study aims to determine the effect of the combination of the STAD learning model with NHT on the problem solving ability of students in class X Mipa 3 and 4 at SMA Negeri 9 Malang with the material being taught is kingdom Monera this research is a qusi-experimental research using a purposive sampling design. The population in this study amounted to 68 students who werea a combination of all class X in the school, while the sample was taken from two classes with 34 participants in the each class. The class was divided into control and experimental classes, where each class used conventional model for the control class and combination of STAD and NHT learning model for the experimental class. The study measures the problem solving ability of students. The data collection teachniques in the study were in the from of problem solving ability tests, observations, interview, documention with instruments in the from of lesson plans, LKPD, LKPD assement rubrics, observation sheets on the implementation of learning implematation plans, and problem solving ability instrument sheets in the from pre-test and post-test essays. Test analysis of research data used inferential statistical analysis with covariate analysis (anacova). The result of the hypothesis test showed that there was a significant effect, namely 0.008 < 0,05 from the learning model combination the STAD and NHT models with the kingdom monera material in class X at SMA Negeri 9 Malang.

The Effect of Combination of Cooperative Learning Type STAD With NHT on Problem Solving Ability in Class X Students at High School Elga Farianti Djarawula; Nugroho Aji Prasetiyo; Zuni Mitasari
Journal of Biology Learning Vol 4 No 2 (2022): September 2022
Publisher : Universitas Veteran Bangun Nusantara Sukoharjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/jbl.v4i2.2375

This study aims to determine the effect of the combination of the STAD learning model with NHT on the problem solving ability of students in class X Mipa 3 and 4 at SMA Negeri 9 Malang with the material being taught is kingdom Monera this research is a qusi-experimental research using a purposive sampling design. The population in this study amounted to 68 students who werea a combination of all class X in the school, while the sample was taken from two classes with 34 participants in the each class. The class was divided into control and experimental classes, where each class used conventional model for the control class and combination of STAD and NHT learning model for the experimental class. The study measures the problem solving ability of students. The data collection teachniques in the study were in the from of problem solving ability tests, observations, interview, documention with instruments in the from of lesson plans, LKPD, LKPD assement rubrics, observation sheets on the implementation of learning implematation plans, and problem solving ability instrument sheets in the from pre-test and post-test essays. Test analysis of research data used inferential statistical analysis with covariate analysis (anacova). The result of the hypothesis test showed that there was a significant effect, namely 0.008 < 0,05 from the learning model combination the STAD and NHT models with the kingdom monera material in class X at SMA Negeri 9 Malang.

The Relationship of Pedagogical Practices on Biology Online Learning With Learning Outcomes at High School During The Covid-19 Pandemic Oktavianus Fian Dega; Yuswa Istikomayanti; Nugroho Aji Prasetiyo
Journal of Biology Learning Vol 4 No 2 (2022): September 2022
Publisher : Universitas Veteran Bangun Nusantara Sukoharjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/jbl.v4i2.2454

This study aims to determine the relationship between pedagogic practice of biology online learning and student learning outcomes in class XI SMAN 9 Malang. This research was conducted from 02, October 2021 to 07, October, 2021 at SMAN 9 Malang. This research includes ex post facto research with quantitative research using survey mode with correlation analysis techniques in surveys, information is collected from respondents using questionnaires or questionnaires. Data analysis techniques in this study are collecting data, reducing data, presenting data, verifying and drawing conclusions. The results of this study are Biology online learning pedagogic practices have a significant relationship with student learning outcomes during the Covid-19 pandemic, but are at a very low level. This is indicated by a significance value of 0.434 where 0.575 > 0.05. In addition, based on the results of a simple correlation analysis obtained a correlation value of 0.103, which means the direction of the relationship is positive. Based on the results of research and discussion, there is a significant relationship between online learning pedagogic practices and student learning outcomes during the Covid-19 pandemic which is at a very low level. Because in the online learning process there are shortcomings, namely the lack of maximum student involvement, lack of learning time, teachers have difficulty determining whether students do assignments independently or not, so teachers must work as much as possible to adapt to the online learning process but these obstacles can be overcome properly due to assistance and motivation of various parties.

HUBUNGAN KESULITAN BELAJAR DENGAN HASIL BELAJAR IPA SISWA KELAS VII SMP NEGERI 26 MALANG Nugroho Aji Prasetiyo; Aminarni Anace Dede; Yuswa Istikomayanti
Inteligensi : Jurnal Ilmu Pendidikan Vol 5, No 2 (2022): Inteligensi Vol.5 No.2
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/ilg.v5i2.4104

The purpose of this study was to ascertain the relationship between the science learning outcomes of Class VII students at SMP Negeri 26 Malang with learning difficulties Low motivation, passivity in class, and difficulties during the discussion process are symptoms of learning difficulties found in science learning at SMP Negeri 26 Malang. Various symptoms of learning difficulties affect student science learning outcomes. This study used a quantitative approach, specifically the type of causal research and questionnaire or data collection of sperm rank correlation questionnaire data from respondents. The results of the study of internal factors and external factors are in the weak category. While scientific difficulties are included in the weak category. The decision to accept H0 leads to the conclusion that the relationship between learning difficulties and science learning outcomes is an insignificant or insignificant relationship. The results of the study relationship between learning difficulties and learning outcomes in the low category, the relationship of scientific learning difficulties with learning outcomes are also in the low category. Based on the correlation, Spearman showed that the results of the relationship between learning difficulties and learning outcomes were insignificant.

IDENTIFIKASI LOGAM BERAT PADA LAHAN PERTANIAN DI SEKITAR INDUSTRI KERTAS DAN PULP KABUPATEN MALANG Hidayati Karamina; Nugroho Aji Prasetiyo; Ariani Trisna Murti; Glorianus Glorianus; Avelinus Tampang
Agrika Vol 17, No 2 (2023)
Publisher : Badan Penerbitan Universitas Widyagama Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/ja.v17i2.4843

ABSTRAKSalah satu industri yang menghasilkan limbah cair yang mengandung logam berat adalah industri kertas dan pulp. Tujuan penelitian ini adalah untuk mengidentifikasi logam berat yang berada di lahan pertanian di sekitar industri kertas dan pulp di Kabupaten Malang. Penelitian dilaksanakan dengan mengambil beberapa sampel tanah dan air dilahan pertanian di sekitar industru tersebut. Penelitian dilaksanakan pada bulan Mei-Juni 2023. Hasil pengujian laboratorium menunjukkan bahwa logam berat ditemukan pada sampel tanah pada lahan pertanian di sekitar industri kertas dan pulp yaitu timbal (Pb) dengan kandungan sebesar 3064 mg/liter, yang melebihi nilai ambang batas, sedangkan kandungan Cadmium (Cd) (0,0020 mg/liter) di bawah ambang batas, kandungan Corganik sedang dan pH tanah agak masam. Pada air limbah industri kertas dan pulp juga ditemukan kandungan Pb yang melebihi ambang batas, sedangkan kandungan Cd tidak melebihi nilai ambang batas. Hasil C Organik tanah masuk dalam kategori sedang dan untuk parameter pH H2O masuk dalam kategori agak masam. ABSTRACTOne of the industries that produces liquid waste containing heavy metals is the paper and pulp industry. The aim of this research is to identify heavy metals in agricultural land around the industry in Malang Regency. The research was carried out by taking several soil and water samples on agricultural land around the industry. The research was carried out in May-June 2023. Laboratory test results showed that heavy metals were found in soil samples on agricultural land around the paper and pulp industry, namely plumbum (Pb) with a content of 3064 mg/liter, which exceeds the threshold value, while the Cadmium (Cd) (0.0020 mg/liter) is below the threshold, the C organic content is moderate and the soil pH is slightly acidic. In wastewater from the industry, it was also found that the Pb content exceeded the threshold value, while the Cd content did not. The soil C organic is in the medium category and the pH parameter H2O is in the slightly acidic category.

Hubungan Jenis Metode Kontrasepsi dengan Kehamilan Tidak Diinginkan (KTD) pada Pasangan Usia Subur (PUS) (Correlation between Contraceptive Method and Unwanted Pregnancy in Fertile Age Couple) Perwiraningtyas, Pertiwi; Prasetiyo, Nugroho Aji
JURNAL NERS LENTERA Vol. 4 No. 1 (2016)
Publisher : Fakultas Keperawatan, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/ners.v4i1.866

Pendahuluan: Program KB di Indonesia masih belum mencapai target yang diinginkan. Penggunaan metode kontrasepsi yang kurang tepat dapat meningkatkan AKI. Salah satu faktor penyebabnya adalah PUS yang mengalami KTD. Wanita yang mengalami KTD memiliki resiko tinggi jika tetap mempertahankan maupun mengakhiri kehamilannya. Metode: Studi analitik observasional menggunakan case control design dengan pendekatan retrospective. Diperoleh 30 sampel Ibu hamil di Puskesmas Dinoyo Malang pada bulan Mei tahun 2016 dengan teknik purposive sampling. Kriteria inklusi adalah PUS yang pernah menggunakan alat kontrasepsi, usia 15-49 tahun. Menggunakan instrument kuesioner dan kohort dari Puskesmas Dinoyo Malang. Hasil: Uji statistik dengan Odds Ratio didapatkan hasil bahwa terdapat hubungan antara jenis metode kontrasepsi terhadap KTD pada PUS dengan nilai signifikansi sebesar 0.016

Kajian Biodegradasi secara In Vitro Menggunakan Bakteri Indigen Lipolitik Fidiastuti, Hasminar Rachman; Prasetiyo, Nugroho Aji
Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) 2016: Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.629 KB)

Aktivitas industri penyamakan dan pengolahan kulit di daerah Kasin, Malang menyumbangkan polutan bagi perairan sungai Badeg. Hasil pengukuran kualitas pada sampel air sungai Badeg menunjukkan kondisi yang tidak memenuhi baku mutu air yaitu TSS sebesar 400 ppm, BOD sebesar 331 mg/L, COD sebesar 544 mg/L, DO sebesar 3,6 mg/L dan kadar lemak sebesar 280 mg/L. Limbah pabrik kulit mengandung lemak dan lemak merupakan salah satu bahan organik yang sulit untuk diuraikan secara alamiah. Biodegradasi diharapkan dapat menjadi solusi perbaikan kondisi perairan dengan cara memanfaatkan aktivitas bakteri indigen dengan karakteristik pendegradasi lemak. Kegiatan biodegradasi dilakukan dengan cara mengintroduksi bakteri indigen yang telah diseleksi dari proses isolasi dan memiliki potensi pendegradasi paling tinggi, kemudian dikultur dan diinokulasikan kembali pada sampel air, sehingga proses transformasi akan berlangsung lebih optimal. Hasil biodegradasi secara in vitro menggunakan bakteri indigen, menunjukkan perubahan TSS sebesar 293ppm, BOD 117 mg/L, COD sebesar 165 mg/L, DO sebesar 19 mg/L dan kadar lemak sebesar 0,02 mg/L. Biodegradasi merupakan cara yang efektif dalam mendegradasi bahan organik, terutama kadar lemak.

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