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All Journal HAYATI Journal of Biosciences REINWARDTIA BERITA BIOLOGI Jurnal Sains Teh dan Kina Jurnal Ilmiah Universitas Batanghari Jambi WAJAH HUKUM Jurnal LEX SPECIALIS Legalitas: Jurnal Hukum Aceh International Journal of Science and Technology Jurnal Isu Teknologi Reinwardtia
Iman hidayat
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering

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ANALISIS LAPIS TANAH DASAR UNTUK BADAN JALAN BERDASARKAN KLASIFIKASI DAN KONSISTENSI TANAH Iman Hidayat; Alpin Nurpzuzi
Jurnal Online Sekolah Tinggi Teknologi Mandala Vol. 18 No. 1 (2023): JURNAL ISU TEKNOLOGI
Publisher : Sekolah Tinggi Teknologi Mandala Bandung

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Abstract

Tanah sebagai material pendukung bangunan, maka dalam perencanaan bangunan teknik sipil mutlak perlu dilakukan penyelidikan tanah. Beberapa daerah di Indonesia memiliki kondisi tanah dasar yang tidak stabil. Skripsi ini merupakan observasi atau studi lapangan terhadap lapisan tanah dasar (subgrade) dengan mengunakan nilai atterberg limit kemudian standar klasifikasi USCS (Unified Soil Classification System) dan AASHTO (American Association of State Highway and Transport Officials) sebagai parameter. Kedua standar tersebut membutuhkan nilai batas cair, indeks plastisitas dan analisis saringan. Hasil pengujian batas cair BH-11 86,29% dan BH-12 76,68% beserta nilai indeks plastisitas BH-11 48,86% dan BH12 43,35% dengan tanah berbutir halus 50% atau lebih lolos saringan No.200. Dari hasil pengujian yang didapat klasifikasi USCS hasil analisis saringan diketahui termasuk dalam kelompok MH dan CH atau lanau/lempung tak organik sedangkan menurut klasifikasi AASHTO tergolong klasifikasi A7 tergolong tanah berlempung dengan kategori untuk tanah dasar (subgrade) sedang sampe buruk.
ANALISIS TINGKAT PELAYANAN JALAN TERHADAP PENGARUH HAMBATAN SAMPING DAN KECEPATAN TEMPUH Iman Hidayat; Agia Setiana
Jurnal Online Sekolah Tinggi Teknologi Mandala Vol. 18 No. 2 (2023): JURNAL ISU TEKNOLOGI
Publisher : Sekolah Tinggi Teknologi Mandala Bandung

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Perkembangan perekonomian masyarakat Kabupaten Bandung berdampak pada sistem transportasi dan arus lalu lintas.Hal ini ditunjukkan dengan adanya penurunan kinerja jalan dan Indeks Tingkat pelayanan (ITP). Tujuan penelitian ini adalah untuk mengetahui pengaruh hambatan samping dan kecepatan tempuh terhadap Indeks Tingkat Pelayanan (ITP) jalan dengan analisis menggunakan Pedoman Kapasitas Jalan Indonesia (PKJI) 2014. Dalam prosesnya, metode penelitian yang digunakan adalah metode kausal komperatif.Lokasi penelitian berada di jalan raya Dayeuhkolot Kabupaten Bandung.Penelitian yang dilakukan dengan survei di lapangan untuk mendapatkan data primer yang kemudian diolah dengan menggunakan acuan PKJI 2014. Hasil pengolahan data diperoleh bahwa frekuensi bobot kejadian hambatan samping (HS) paling tinggi terjadi pada hari Rabu jam 11.00-12.00 WIB dengan total kejadian 920 Skr/jam dengan nilai kelas hambatan samping sangat tinggi, pencapaian kecepatan arus bebas berkisar 48,27% - 95,67%, volume (Q) lalu lintas maksimum terjadi pada hari Rabu jam 18.00-19.00 WIB sebanyak 3600 skr/jam, kapasitas dengan nilai Derajat Kejenuhan (DJ) sebesar 1,18 sehingga tingkat pelayanan jalan F. Untuk volume (Q), hambatan samping (HS), Kecepatan (V) mempengaruhi Indeks Tingkat Pelayanan (ITP) jalan sebesar 97,80%. Oleh sebab itu, solusi yang dapat direncanakan adalah melakukan manajemen dan rekayasa lalu lintas.
Alkaloid profile of endophytic Diaporthe spp. from Cinchona calisaya Nani Radiastuti; Gayuh Rahayu; Izumi Okane; Iman Hidayat; Suminar S. Achmadi
Jurnal Penelitian Teh dan Kina Vol 18 No 1 (2015)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v18i1.69

Abstract

Endophytic fungi have been known as potential source of bioactive compound, similar to their host.  This study was conducted to identify endophytic Diaporthe spp. isolated from Cinchona calisaya and to explore their potential in producing alkaloids, particularly quinine. A total of 39 strains of Diaporthe spp. were identified using ITS1-5.8S-ITS2 and EF1-α gene. Seventeen strains have species name and they represent eight species of Diaporthe i.e. D. cynaroidis, D. endophytica, D. ganjae, D. gardeniae, D. litchicola, D. phaseolorum, D. pseudomangiferae, and D. rhoina. The re­maining 22 strains represents 15 groups of unidentified Diaporthe sp. High performance liquid chromatography analyses of chloroform extract of 21-days old static cultures of all fungi in potato dextrose broth showed that these strains produce totally 82 different alkaloids. Each strain producedabout 2-38 different alkaloids. Sixteen out of 39 strains (41%), i.e. one strain each of D. endophytica, D. gar­deniae,  D. phaseolorum, and  D. pseudo­mangiferae, 2 strains of D. litchicola, and 10 strains of unidentified Diaporthe were able to produce quinine. The quinine concentration ranges from 1.1 mg/l to 155.2 mg/l. By using Jaccard’s similarity index 0.44 as the cutting score, UPGMA analyses of alkaloid profile of these strains shows that these strains forms 23 clusters. Alkaloid profile clustering does not support the phylogenetic grouping. This indicates that the alkaloid profile is strain dependent. Some potential strains should be further investigated for optimization of their quinine production.
CERCOSPORA BRUNFELSIICOLA (FUNGI, MYCOSPHAERELLACEAE), A NEW TROPICAL CERCOSPOROID FUNGUS ON BRUNFELSIA UNIFLORA Iman Hidayat; Jamjan Meeboon
Reinwardtia Vol. 14 No. 1 (2014)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v14i1.417

Abstract

Cercospora brunfelsiicola on Brunfelsia uniflora is proposed as a new species based on a combination of molecular phylogenetic and morphological data analyses. The molecular phylogenetic analysis based on combined multilocus analyses of the Internal Transcribed Spacer (ITS), part of the elongation factor 1–a gene (EF1–a), and part of the calmodulin (CAL) gene regions showed that C. brunfelsiicola is phylogenetically distinguishable from other Cercospora species, including members of the C. apii s. lat. complex. Morphologically, C. brunfelsiicola differs from other closely related Cercospora species, in particular C. acaciae-mangii, by forming lesions with indistinct margin, larger stromata [(32) 48.5 ± 10.6 (68) ?m diam.], and filiform to narrowly obclavate conidia [(45) 59 ± 9.1 (72) × (2.5) 2.5 ± 0.2 (3) ?m].
CERCOSPORA BRUNFELSIICOLA (FUNGI, MYCOSPHAERELLACEAE), A NEW TROPICAL CERCOSPOROID FUNGUS ON BRUNFELSIA UNIFLORA Iman Hidayat; Jamjan Meeboon
Reinwardtia Vol. 14 No. 1 (2014)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v14i1.417

Abstract

Cercospora brunfelsiicola on Brunfelsia uniflora is proposed as a new species based on a combination of molecular phylogenetic and morphological data analyses. The molecular phylogenetic analysis based on combined multilocus analyses of the Internal Transcribed Spacer (ITS), part of the elongation factor 1–a gene (EF1–a), and part of the calmodulin (CAL) gene regions showed that C. brunfelsiicola is phylogenetically distinguishable from other Cercospora species, including members of the C. apii s. lat. complex. Morphologically, C. brunfelsiicola differs from other closely related Cercospora species, in particular C. acaciae-mangii, by forming lesions with indistinct margin, larger stromata [(32) 48.5 ± 10.6 (68) ?m diam.], and filiform to narrowly obclavate conidia [(45) 59 ± 9.1 (72) × (2.5) 2.5 ± 0.2 (3) ?m].
Co-Authors . DARMAWAN . Ismail . SUPUTA Abadi B Darmo Abdul Bari Azed Agia Setiana Agus Pranoto Alpin Nurpzuzi Andi Kusuma Asep Muhidin Chairijah . CIPTO WALUYO Deval Yustra Ega Afriandi Gayuh Rahayu Hari Purnomo Hari Sutrisno Ibrahim Ibrahim Izumi Okane Jamjan Meeboon M Zen Abdullah Muhammad Chairul Idrah Nani Radiastuti NUNUK WIDYASTUTI Osriansyah Osriansyah ROSICHON UBAIDILLAH SISWO POLANDONO Suciatmih Suciatmih Suminar S. Achmadi