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Isolation and Identification of Mold Contaminants on Mushroom Growing Medium (Bag Log) and Their Cellulolytic Performance Test Handayani, Tatik; Purwantisari, Susiana
JURNAL SAINS DAN MATEMATIKA Volume 23 Issue 2 Year 2015
Publisher : JURNAL SAINS DAN MATEMATIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (351.241 KB)

Mushrooms naturally grows on logs that have experienced weathering. Raw materials of mushroom growth media containing plenty of wild microbes, especially wild mold on sawdust media. Sterilization conducted did not prevent the occurrence of contamination. This study aim was to determine the types of contaminant molds in cultivated mushroom growth media (bag logs), as well as determine their cellulolytic performance. Mushroom growth media (bag log) samples were taken from three mushroom cultivation locations. Mold isolates obtained were identified by their macroscopic and microscopic characteristics. Test the mold cellulolytic performance was conducted by measuring the ratio of hydrolysis zone with the diameter of mold on CMC (Carboxy Methyl Cellullose) media. The isolation and identification results of contaminant molds consisted of mold isolates which could be grouped into 7 genus which were Aspergillus, Penicillium, Paecillomyces, Trichoderma, Rhizopus, Fusarium and Syncephalastrum. The cellulolytic performances of mold on CMC media showed that Aspergillus flavus has the greatest cellulolytic ability.

Dampak Implementasi Ekonomi Berkelanjutan dan Solusi Inovasi Sosial terhadap Kinerja Finansial dan Reputasi Perusahaan Start-up di Indonesia Marliani, Gusti; Judijanto, Loso; Handayani, Tatik; Sulistyaningsih, Elli; Desiyanti, Rika
Sanskara Ekonomi dan Kewirausahaan Vol. 3 No. 01 (2024): Sanskara Ekonomi dan Kewirausahaan (SEK)
Publisher : Eastasouth Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/sek.v3i01.460

Penelitian ini menyelidiki dampak implementasi ekonomi berkelanjutan dan solusi inovasi sosial terhadap kinerja keuangan serta reputasi perusahaan start-up di Indonesia. Dengan pendekatan kuantitatif, data dari 270 perusahaan start-up dikumpulkan melalui kuesioner terstruktur dengan skala Likert 1-5, dan dianalisis menggunakan Structural Equation Modeling-Partial Least Squares (SEM-PLS) untuk menguji hubungan antar variabel. Hasil menunjukkan bahwa praktik ekonomi berkelanjutan dan solusi inovasi sosial berpengaruh positif dan signifikan terhadap kinerja keuangan dan reputasi perusahaan, di mana inovasi sosial memiliki dampak lebih kuat terhadap reputasi, sementara implementasi ekonomi berkelanjutan lebih memengaruhi kinerja keuangan. Temuan ini menegaskan pentingnya integrasi strategi keberlanjutan dan inovasi sosial bagi perusahaan rintisan untuk mencapai kesuksesan finansial dan reputasi pasar yang kuat. Studi ini memberikan wawasan berharga bagi wirausahawan, investor, dan pembuat kebijakan, menyoroti pentingnya mendorong keberlanjutan dan inovasi dalam ekosistem kewirausahaan di Indonesia.

ANALISIS ALTERASI DAN MINERALISASI BERDASARKAN PENGAMATAN MEGASKOPIK DAN MIKROSKOPIK PADA DAERAH PROSPEK X KABUPATEN BOLAANG MONGONDOW, SULAWESI UTARA: ALTERATION AND MINERALIZATION ANALYSIS BASED ON OBSERVATION OF MEGASCOPIC AND MICROSCOPIC ON PROSPECT "X" IN BOLAANG MONGONDOW REGENCY AT NORTH SULAWESI Christi, Gita Dela; Sulistiyono, Sulistiyono; Handayani, Tatik; Widhiyatna, Denni
Buletin Sumber Daya Geologi Vol 19 No 1 (2024): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v19i1.436

The North Arm of Sulawesi Island is a gold-rich metallogenic belt. The study area is located in Bakan Village, Bolaang Mongondow Regency, North Sulawesi in the IUP area of PT J Resources Bolaang Mongondow. Exploration to obtain new prospect areas is still being carried out. Therefore, research on alteration and mineralisation characteristics is expected to be a reference for the discovery of new prospects. The research was conducted by identifying surface and subsurface data megascopically and microscopically. Microscopic observations with petrography and mineragraphy. To obtain surface data, alteration observations, channel sampling and grab sampling were carried out, while subsurface data were obtained from core drilling. The purpose of the study was to determine the alteration, mineralisation, oxidation, and deposits type. The study area has lithologies of hydrothermal breccia, diatreme breccia, fault breccia, and tuff breccia. Alteration developed in the form of vuggy sillica, massive sillica, advanced argillic, and argillic. Mineralisation includes gold and silver and sulphide minerals such as pyrite, chalcopyrite, sphalerite, enargite, covellite, and oxide minerals such as goethite, jarosite and hematite. The epithermal high sulphidation deposit type was formed at medium depth, with oxide-type ore.

ALTERASI DAN MINERALISASI PADA DAERAH SUB-PROJECT S, BLOK A, PT SUMBAWA BARAT MINERAL, KABUPATEN SUMBAWA BARAT, PROVINSI NUSA TENGGARA BARAT: ALTERATION AND MINERALIZATION IN SUB-PROJECT S AREA, BLOCK A, PT SUMBAWA BARAT MINERAL, WEST SUMBAWA DISTRICT, WEST NUSA TENGGARA PROVINCE Nugroho, Ariel Dwiyanto; Shiddiq, Asep Mohamad I; S. J. Suprapto; Handayani, Tatik; Sahidin
Buletin Sumber Daya Geologi Vol 19 No 3 (2024): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v19i3.474

The research area is located in the Mining Business License (IUP) owned by PT Sumbawa Barat Mineral located in Taliwang, West Sumbawa, West Nusa Tenggara, located on the Sunda-Banda Arc magmatic line which shows the potential for metal mineralization resulting from hydrothermal activity in the research area, the potential for mineralization spread in the research area is epithermal type. This research aims to determine the alteration, mineralization and type of depositethat develops in the research area. The methods used in this research are geological mapping with grid mapping method and grab sampling, XRF analysis by looking for elemental content, petrography analysis to determine the texture and structure of rocks and minerals, mineragraphy analysis to determine the kind of metallic minerals, and XRD analysis to identify alteration minerals in more detail. The results of this research show the presence of propylitic, argillic, advanced argillic, and silicified alteration. With mineralization of silver, copper, lead, zinc, arsenic, and manganese with the presence of covellite minerals, and dickite, the mineralization type of the research area is intermediate depth high sulfidation epithermal type.

ANALISIS ALTERASI DAN MINERALISASI BERDASARKAN PENGAMATAN MEGASKOPIK DAN MIKROSKOPIK PADA DAERAH PROSPEK X KABUPATEN BOLAANG MONGONDOW, SULAWESI UTARA: ALTERATION AND MINERALIZATION ANALYSIS BASED ON OBSERVATION OF MEGASCOPIC AND MICROSCOPIC ON PROSPECT "X" IN BOLAANG MONGONDOW REGENCY AT NORTH SULAWESI Christi, Gita Dela; Sulistiyono, Sulistiyono; Handayani, Tatik; Widhiyatna, Denni
Buletin Sumber Daya Geologi Vol 19 No 1 (2024): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v19i1.436

The North Arm of Sulawesi Island is a gold-rich metallogenic belt. The study area is located in Bakan Village, Bolaang Mongondow Regency, North Sulawesi in the IUP area of PT J Resources Bolaang Mongondow. Exploration to obtain new prospect areas is still being carried out. Therefore, research on alteration and mineralisation characteristics is expected to be a reference for the discovery of new prospects. The research was conducted by identifying surface and subsurface data megascopically and microscopically. Microscopic observations with petrography and mineragraphy. To obtain surface data, alteration observations, channel sampling and grab sampling were carried out, while subsurface data were obtained from core drilling. The purpose of the study was to determine the alteration, mineralisation, oxidation, and deposits type. The study area has lithologies of hydrothermal breccia, diatreme breccia, fault breccia, and tuff breccia. Alteration developed in the form of vuggy sillica, massive sillica, advanced argillic, and argillic. Mineralisation includes gold and silver and sulphide minerals such as pyrite, chalcopyrite, sphalerite, enargite, covellite, and oxide minerals such as goethite, jarosite and hematite. The epithermal high sulphidation deposit type was formed at medium depth, with oxide-type ore.

ALTERASI DAN MINERALISASI PADA DAERAH SUB-PROJECT S, BLOK A, PT SUMBAWA BARAT MINERAL, KABUPATEN SUMBAWA BARAT, PROVINSI NUSA TENGGARA BARAT: ALTERATION AND MINERALIZATION IN SUB-PROJECT S AREA, BLOCK A, PT SUMBAWA BARAT MINERAL, WEST SUMBAWA DISTRICT, WEST NUSA TENGGARA PROVINCE Nugroho, Ariel Dwiyanto; Shiddiq, Asep Mohamad I; S. J. Suprapto; Handayani, Tatik; Sahidin
Buletin Sumber Daya Geologi Vol 19 No 3 (2024): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v19i3.474

The research area is located in the Mining Business License (IUP) owned by PT Sumbawa Barat Mineral located in Taliwang, West Sumbawa, West Nusa Tenggara, located on the Sunda-Banda Arc magmatic line which shows the potential for metal mineralization resulting from hydrothermal activity in the research area, the potential for mineralization spread in the research area is epithermal type. This research aims to determine the alteration, mineralization and type of depositethat develops in the research area. The methods used in this research are geological mapping with grid mapping method and grab sampling, XRF analysis by looking for elemental content, petrography analysis to determine the texture and structure of rocks and minerals, mineragraphy analysis to determine the kind of metallic minerals, and XRD analysis to identify alteration minerals in more detail. The results of this research show the presence of propylitic, argillic, advanced argillic, and silicified alteration. With mineralization of silver, copper, lead, zinc, arsenic, and manganese with the presence of covellite minerals, and dickite, the mineralization type of the research area is intermediate depth high sulfidation epithermal type.

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