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All Journal PROSIDING SEMINAR NASIONAL Medula Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Indonesian Journal of Chemical Science
Ahmad Zaeni
Unknown Affiliation
Humanities Biochemistry, Genetics & Molecular Biology Chemistry Education Immunology & microbiology Medicine & Pharmacology Nursing Physics Public Health

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UJI AKTIVITAS TABIR SURYA FORMULA SEDIAAN LOSIO EKSTRAK METANOL DAUN MANGKOKAN (Nothophanax scutellarium Merr.) Suryani Suryani; Rini Hamsidi; Nurlena Ikawati; Ahmad Zaeni; Hasnawati Hasnawati
MEDULA JURNAL ILMIAH FAKULLTAS KEDOKTERAN UNIVERSITAS HALU OLEO Vol 2, No 1 (2014)
Publisher : Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.548 KB) | DOI: 10.46496/medula.v2i1.245

Abstract

Leaves of mangkokan  (Nothophanax scutellarium Merr.) contain a potent antioxidant and sunscreen compounds. This plant potential to be developed into cosmetic products. One of cosmetic product that can be developed  using  natural  product  is  lotion.  This  research  aims  to  formulate  lotion  from  methanol  extracts  of leaves  mangkokan  and  determining  the  sunscreen  activity  of  lotion  with  various  concentration  of  the  extract 1%; 2.5%; 5%; 7.5%; and 10% using laboratory experimental design.  Preparation of mangkokan leaf extracts using methanol solvent by maceration method. Further tests conducted to determine the activity of sunscreen. Methanol extract of the leaves mangkokan then formulated to be lotion. Sunscreen activity of lotion was tested by  determaining  SPF  values.  Lotion  methanol  extract  of  leaves  mangkokan  resulting  the  highest  SPF  value contained in the methanol extract of the leaves mangkokan concentration of 10%. Keywords: mangkokan leaves, lotion, extract, lotion, sunscreen
KEEFEKTIFAN MODEL PEMBELAJARAN SNOWBALL THROWING DENGAN PENDEKATAN KONTEKSTUAL TERHADAP KEMAMPUAN KOMUNIKASI MATEMATIS SISWA KELAS VIII MATERI BANGUN RUANG SISI DATAR Ahmad Zaeni; Dwi Sulistyaningsih; Iswahyudi Joko Suprayitno
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2017: Prosiding Seminar Nasional Pendidikan, Sains dan Teknologi
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.851 KB)

Abstract

This study aims to determine the effectiveness of Snowball Throwing learning modelwith a contextual approach to the ability of mathematical communication. Thisresearch is an experimental research with population of all class VIII in MTsHidayatussibyan Lancar. Sampling technique using Saturated Sampling. Samplingtechnique using Saturation Sampling technique. The sample in this research is class VIII A, VIII B and class VIII C. Data collection method used in this research is interview, documentation, observation, questionnaire, and test. The results of this study show that learning achieves individual mastery with an average of 81.2 and classical completeness of 80.9%. The result of influence test showed the influence of student's activeness and interest toward the mathematical communication ability of 92%. Different test results also show that there is a difference of average mathematical communication ability between experimental class and control class, with the average of experimental class 81,2 while control class average is 77,2. Based on this it can be concluded that learning using Snowball Throwing model with a contextual approach to the ability of effective mathematical communication.Keywords: Snowball Throwing, contextual, mathematical communication ability.
Model Kegiatan Kuliah Kerja Nyata (KKN) Mahasiswa di Era Pandemik Covid Ahmad Zaeni; Aris Badara; La Aso; Alberth Alberth; Busnawir Busnawir; Al Wahab; Prima Endang Susilowati
Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Perguruan Tinggi Mengabdi: Berkarya dan Berinovasi Untuk Membangun Masyarakat Semakin Tangguh di Mas
Publisher : Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS)

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Abstract

Pandemi Covid -19 yang melanda dunia memberikan dampak di berbagai bidang. Salah satunya berdampak pada kegiatan Kuliah Kerja Nyata (KKN) mahasiswa. Anjuran untuk menghindari kerumunan dan jaga jarak menjadi dasar untuk mencari alternatif metode pelaksanaan kegiatan KKN Mahasiswa. Kondisi ini memaksa semua kegiatan beralih ke metoda komunikasi digital, termasuk kegiatan KKN. Penerapan metode penyuluhan KKN secara online memberikan pengalaman yang baru bagi masarakat. Berbagai daerah di Indonesia termasuk di lokasi KKN (Desa Amoito Siama Kabupaten Konawe Selatan Sulawesi Tenggara). Ternyata masih banyak kendala dalam proses sosialisasi secara online. Kondisi ini dikarenakan antara lain masih minimnya fasilitas internet, peralatan, kemampuan masyarakat membeli kuota, serta kemampuan menggunakan peralatan digital. Pada kegiatan ini dilakukan pendampingan oleh mahasiswa KKN untuk mengatasi masalah di atas, termasuk saat melaksanakan webinar. Hasil kegiatan ini sesuai dengan yang diharapkan yaitu pada kegiatan yang dilaksanakan melalui webinar telah dapat memberikan tambahan ilmu bagi masyarakat, tanpa harus mengabaikan protokol kesehatan. Terlihat dari antusiasme masyarakat dan peningkatan pemahaman masyarakat terhadap suatu permasalahan. Perkembangan digital yang pesat dan situasi darurat semacam ini menuntut semua lapisan masyarakat harus menyesuaikan perkembangan.Kata kunci—Digital, KKN Mahasiswa, Pandemik Covid-19, Webinar
Aerobic Degradation of Linear Alkylbenzene Sulfonate in Activated Sludge with the Addition of Glucose, KNO3, and KH2PO4 Arifin, Zainal Syam; Nur Sila Alisi; Ahmad Zaeni
Indonesian Journal of Chemical Science Vol. 14 No. 2 (2025): Indonesian Journal of Chemical Science
Publisher : Prodi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v14i2.13654

Abstract

As urban populations grow, the demand for laundry services increases, leading to more detergent waste containing linear alkyl benzene sulfonate (LAS) discharged into the environment. This study investigates the ex-situ degradation of laundry waste in an aerobically activated sludge tank by adding 6 g glucose, 1 g KNO₃, and 0.5 g KH₂PO₄ as nutrient sources. Wastewater samples from two laundry sites were treated with indigenous bacteria from contaminated sludge. The study aimed to assess LAS degradation and reductions in biochemical oxygen demand (BOD) and chemical oxygen demand (COD). LAS levels were monitored over ten days, showing 89.1% and 85.3% degradation efficiencies for the two samples, respectively. BOD decreased from 136.05 to 14.64 mg/L and 140.74 to 13.85 mg/L, while COD dropped from 340.56 to 47.52 mg/L and from 337.91 to 47.49 mg/L. Despite significant BOD reduction, COD levels remained high, indicating the presence of non-biodegradable compounds. The food to microorganisms (F/M) ratio increased over ten days, confirming that activated sludge, with nutrient addition, effectively degrades LAS by over 85%. These results highlight the potential for nutrient-augmented activated sludge systems to manage LAS contamination in laundry wastewater. However, further research is needed to address the persistence of non-biodegradable compounds.
Co-Authors Alberth, Alberth Alwahab Alwahab Arifin, Zainal Syam Aris Badara Busnawir Busnawir Dwi Sulistyaningsih Hasnawati Hasnawati Iswahyudi Joko Suprayitno La Aso Nur Sila Alisi Nurlena Ikawati PRIMA ENDANG SUSILOWATI Rini Hamsidi Suryani Suryani