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arXiv 2024年

作者： Greklek-McKeon, Michael Vissapragada, Shreyas Knutson, Heather A. Fukui, Akihiko Saidel, Morgan Barrientos, Jonathan Gomez Levine, W. Garrett Behmard, Aida Batygin, Konstantin Chachan, Yayaati Vasisht, Gautam Hu, Renyu Cloutier, Ryan Latham, David López-Morales, Mercedes Vanderburg, Andrew Heffner, Carolyn Nied, Paul Milburn, Jennifer Wilson, Isaac Roderick, Diana Koviak, Kathleen Barlow, Tom Stone, John F. Kiman, Rocio Korth, Judith de Leon, Jerome P. Fukuda, Izuru Hayashi, Yuya Ikoma, Masahiro Ikuta, Kai Isogai, Keisuke Kawai, Yugo Kawauchi, Kiyoe Kusakabe, Nobuhiko Livingston, John H. Mori, Mayuko Narita, Norio Tamura, Motohide Watanabe, Noriharu Fernández-Rodríguez, Gareb Division of Geological and Planetary Sciences California Institute of Technology PasadenaCA91125 United States Carnegie Science Observatories PasadenaCA91101 United States Komaba Institute for Science The University of Tokyo Tokyo153-8902 Japan Tenerife La Laguna38205 Spain Department of Astronomy Yale University New HavenCT06511 United States American Museum of Natural History 200 Central Park West New YorkNY10024 United States Department of Physics McGill University 3600 Rue University MontrealQCH3A 2T8 Canada Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive PasadenaCA91109 United States Department of Physics & Astronomy McMaster University 1280 Main St West HamiltonONL8S 4L8 Canada Center for Astrophysics Harvard & Smithsonian 60 Garden St CambridgeMA02138 United States Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology 77 Massachusetts Ave CambridgeMA02139 United States Division of Physics Mathematics & Astronomy California Institute of Technology PasadenaCA91125 United States Lund Observatory Division of Astrophysics Department of Physics Lund University Box 118 Lund22100 Sweden Department of Multi-Disciplinary Sciences Graduate School of Arts and Sciences The University of Tokyo 3-8-1 Komaba Meguro Tokyo153-8902 Japan Division of Science National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Okayama Observatory Kyoto University 3037-5 Honjo Kamogatacho Asakuchi Okayama719-0232 Japan Department of Physical Sciences Ritsumeikan University Shiga Kusatsu525-8577 Japan Astrobiology Center 2-21-1 Osawa Mitaka Tokyo181-8588 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Astronomical Science Program Graduate University for Advanced Studies SOKENDAI 2-21-1

TOI-1266 is a benchmark system of two temperate (d = 3.68−+110511M⨁), and combine the TTVs with archival radial velocity (RV) measurements to improve our knowledge of the planetary masses and radii. We find that, consistent with previous studies, TOI-1266 b (Rb = 2.52 ± 0.08 R⨁, Mb = 4.46 ± 0.69 M⨁) has a low bulk density requiring the presence of a hydrogen-rich envelope, while TOI-1266 c (Rc = 1.98 ± 0.10 R⨁, Mc = 3.17 ± 0.76 M⨁) has a higher bulk density that can be matched by either a hydrogen-rich or water-rich envelope. Our new dynamical model reveals that this system is arranged in a rare configuration with the inner and outer planets located near the 3:1 period ratio with a non-resonant planet in between them. Our dynamical fits indicate that the inner and outer planet have significantly nonzero eccentricities (eb + ed = 0.076−+00029019), suggesting that TOI-1266 b may have an inflated envelope due to tidal heating. Finally, we explore the corresponding implications for the formation and long-term evolution of the system, which contains two of the most favorable cool ( © 2024, CC BY.

关键词： Planets

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Ways forward in transdisciplinary research: Insights from case studies on marine and coastal conflict transformations

Sustainable Futures

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Sustainable Futures 2025年 9卷

作者： Mello NGR Christie P Prado DS Martins IM Saunders F Tafon R Gilek M Sowman M Sander G Dukes F P Jacobi Pierro B Christofoletti RA Institute of Marine Sciences Federal University of São Paulo (IMar/UNIFESP) Santos SP Brazil School of Marine and Environmental Affairs and Henry M. Jackson School of International Studies University of Washington Seattle WA USA School of Natural Sciences Technology and Environmental Studies Södertörn University Huddinge Sweden Department of Environmental and Geographical Science University of Cape Town Cape Town South Africa Norwegian Institute for Water Research Tromsø Norway Institute for Environmental Negotiation at the University of Virginia Charlottesville VA USA Institute of Energy and Environment Graduate Program in Environmental Sciences University of São Paulo São Paulo Brazil

Transdisciplinary research has been put forward as a means to foster a radical shift in traditional scientific paradigms by promoting knowledge democracy while tackling wicked problems. This paper analyses how local social-ecological dynamics and institutional realities affect the way in which transdisciplinary research generates knowledge and develops sustainability pathways in diverse marine and coastal conflict contexts. Drawing on a cross-case analysis from a multicountry Belmont Forum project, namely OceansPact, this research analyzes key lessons on transdisciplinary practice. This analysis is informed by online surveys, semi-structured interviews with scholars and focus group discussions with non-academic stakeholders involved in the OceansPact. The paper demonstrates that transdisciplinary approaches can foster conflict transformation. Nonetheless, the results highlight that context-specific factors, including trust-building strategies and institutional cultures, significantly shape the processes of knowledge co-production and linking knowledge to transformative action. This study hence emphasize the need of flexible approaches, instead of standardized frameworks, that accommodate these diverse contexts and power dynamics, warning against reductionist approaches that oversimplify complexity. Emphasizing the political nature of transdisciplinarity, this paper calls for mechanisms that mitigate power asymmetries in transdisciplinary spaces. This paper moreover underscores the urgent need of systemic changes in academic institutions to support long-term, equitable collaboration between scholars and non-academic stakeholders, as well as of a shared understanding of transdisciplinary research so that this model can drive positive transformation.

关键词： Transdisciplinary research Knowledge co-production Knowledge-to-action Conflict transformation

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Simultaneous multicolour transit photometry of hot Jupiters HAT-P-19b, HAT-P-51b, HAT-P-55b, and HAT-P-65b

arXiv

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arXiv 2024年

作者： Kang, Huiyi Chen, Guo Pallé, Enric Murgas, Felipe García, Nestor Abreu de Leon, Jerome Enoc, Gareb Esparza-Borges, Emma Fukuda, Izuru Fukui, Akihiko Galán, Daniel Hayashi, Yuya Isogai, Keisuke Kagetani, Taiki Kawauchi, Kiyoe Korth, Judith Livingston, John H. Luque, Rafael Ma, Yuehua Madrigal-Aguado, Alberto Meni, Pedro Rodriguez, Pilar Montañes Mori, Mori Torres, Sara Muñoz Narita, Norio Orell-Miquel, Jaume Parviainen, Hannu Peláez-Torres, Alberto Stangret, Monika Tamura, Motohide Watanabe, Noriharu CAS Key Laboratory of planetary sciences Purple Mountain Observatory Chinese Academy of Sciences Nanjing210023 China School of Astronomy and Space Science University of Science and Technology of China Hefei230026 China CAS Center for Excellence in Comparative Planetology Hefei230026 China Instituto de Astrofísica de Canarias Vía Láctea s/n Tenerife La Laguna38205 Spain Departamento de Astrofísica Universidad de La Laguna C/Padre Herrera Tenerife La Laguna38206 Spain Department of Multi-Disciplinary Sciences Graduate School of Arts and Sciences The University of Tokyo 3-8-1 Komaba Meguro Tokyo153-8902 Japan Komaba Institute for Science The University of Tokyo 3-8-1 Komaba Meguro Tokyo153-8902 Japan Okayama Observatory Kyoto University 3037-5 Honjo Kamogatacho Okayama Asakuchi719-0232 Japan Department of Physical Sciences Ritsumeikan University Shiga Kusatsu525-8577 Japan Lund Observatory Division of Astrophysics Department of Physics Lund University Box 43 Lund22100 Sweden Astrobiology Center 2-21-1 Osawa Mitaka Tokyo181-8588 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Astronomical Science Program Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Department of Astronomy & Astrophysics University of Chicago ChicagoIL60637 United States School of Architecture Universidad Europea de Canarias C/Inocencio Garcia 1 Tenerife La Orotava38300 Spain INAF - Osservatorio Astronomico di Padova Vicolo dell'Osservatorio 5 Padova35122 Italy Department of Astronomy University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-0033 Japan

Accurate physical parameters of exoplanet systems are essential for further exploration of planetary internal structure, atmospheres, and formation history. We aim to use simultaneous multicolour transit photometry to improve the estimation of transit parameters, to search for transit timing variations (TTVs), and to establish which of our targets should be prioritised for follow-up transmission spectroscopy. We performed time series photometric observations of 12 transits for the hot Jupiters HAT-P-19b, HAT-P-51b, HAT-P-55b, and HAT-P-65b using the simultaneous four-colour camera MuSCAT2 on the Telescopio Carlos Sánchez. We collected 56 additional transit light curves from TESS photometry. To derive transit parameters, we modelled the MuSCAT2 light curves with Gaussian processes to account for correlated noise. To derive physical parameters, we performed EXOFASTv2 global fits to the available transit and radial velocity data sets, together with the Gaia DR3 parallax, isochrones, and spectral energy distributions. To assess the potential for atmospheric characterisation, we compared the multicolour transit depths with a flat line and a clear atmosphere model. We consistently refined the transit and physical parameters. We improved the orbital period and ephemeris estimates, and found no evidence for TTVs or orbital decay. The MuSCAT2 broadband transmission spectra of HAT-P-19b and HAT-P-65b are consistent with previously published low-resolution transmission spectra. We also found that, except for HAT-P-65b, the assumption of a planetary atmosphere can improve the fit to the MuSCAT2 data. In particular, we identified HAT-P-55b as a priority target among these four planets for further atmospheric studies using transmission spectroscopy. Copyright © 2024, The Authors. All rights reserved.

关键词： Photometry

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Crystallographic preferred orientation of (Mg,Fe)O up to 125 GPa inferred from torsional deformation experiments using a rotational diamond anvil cell

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Physics of the Earth and Planetary Interiors 2025年 366卷

作者： Bunrin Natsui Shintaro Azuma Keishi Okazaki Kentaro Uesugi Masahiro Yasutake Saori Kawaguchi-Imada Ryuichi Nomura Kenji Ohta Department of Earth and Planetary Sciences Institute of Science Tokyo 2-12-1 Ookayama Meguro Tokyo 152-8550 Japan Earth and Planetary Systems Science Program Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8526 Japan Kochi Institute for Core Sample Research (X-star) Japan Agency for Marine-Earth Science and Technology (JAMSTEC) 200 Monobe-otsu Nankoku Kochi 783-8502 Japan Japan Synchrotron Radiation Research Institute (JASRI/SPring-8) 1-1-1 Koto Sayo Hyogo 679-5198 Japan Hakubi Center/Graduate School of Human and Environmental Studies Kyoto University Yoshida-nihonmatsu cho Sakyo ku Kyoto 606-8501 Japan

To investigate the texture development of (Mg,Fe)O, we conducted torsional deformation experiments on (Mg,Fe)O with varying Fe contents under pressures up to 125 GPa and temperatures up to 900 K using a rotational diamond anvil cell combined with synchrotron X-rays. The results indicate that the texture development follows the same trend as that observed in MgO, even when the Fe content varies or undergoes a spin transition. However, we found that the crystal plane perpendicular to the compression direction of (Mg,Fe)O could transition from {110} to {100} at lower pressure and temperature conditions than in MgO, attributable to the effect of Fe incorporation. Additionally, the texture of (Mg,Fe)O may vary with the combination of Fe content and strain. In regions with high Fe content and large strains, such as the D″ layer, it may be necessary to evaluate the seismic anisotropy of (Mg,Fe)O based on the texture considering the effects of Fe content and strain.

关键词： (Mg,Fe)O Crystallographic preferred orientation Mantle Spin transition Deformation experiments

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Rubber Plant Disease Diagnostic System Using Technique for Order Preference by Similarity to Ideal Solution

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Procedia Computer science 2019年 161卷 484-492页

作者： Ramadiani M. Syahrir Ramadhani Muhammad Labib Jundillah Azainil Faculty of Computer Science and Information Technology Mulawarman University Samrinda Indonesia Magister Program of Information System School of Post Graduate Studies Diponegoro University Semarang Indonesia Faculty of Teacher Training and Education Mulawarman University Samarinda Indonesia

Data from the Plantation Office of East Kalimantan Province, the area of rubber plantations has decreased every year. One of the factors that make productivity of rubber plants low is the presence of pests and diseases. The time limit of an expert is an obstacle in identifying rubber plantations. To overcome this problem, we need an expert system that can identify rubber plant diseases such as an expert. This system was developed to be able to provide solutions in diagnosing rubber plant diseases such as White Root Fungus (Rigidoporus micropus), Upas Mushroom Disease (Corticium salmonicolor), Antraknosa Disease (Colletorichum gloeosporoides), Skin Necrosis (Fusarium sp.), And Cancer Lines (Phytoptora palmivore). This study uses the TOPSIS method. There are four variables used as assessment criteria in this study, namely: the level of damage to the root, the level of damage to the stem, the level of damage to the leaves and the level of damage to the tapping path or the intensity of tapping, with preference values from 0 to 100; none, Very Light Intensity (1), Mild Intensity (3), Medium Intensity (5), Weight Intensity (7) and Very Heavy Intensity (9). Each weight value C1= 0.3; C2= 0.22; C3= 0.28; C4= 0.2. The results of this study compare manual calculations and calculations on the system obtained 99.99% accuracy. This system is expected to help facilitate rubber farmers in identifying diseases and can help experts.

关键词： Rubber Plant Disease East Kalimantan TOPSIS Expert System

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Feedback from protoclusters does not significantly change the kinematic properties of the embedded dense gas structures

arXiv

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arXiv 2023年

作者： Zhou, J.W. Dib, S. Wyrowski, F. Liu, T. Li, S.H. Sanhueza, P. Juvela, M. Xu, F.W. Liu, H.L. Baug, T. Peng, Y.P. Menten, K.M. Bronfman, L. Lee, C.W. Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 Bonn53121 Germany Max Planck Institute for Astronomy Königstuhl 17 Heidelberg69117 Germany Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Department of Physics University of Helsinki P.O.Box 64 FI-00014 Finland Kavli Institute for Astronomy and Astrophysics Peking University Haidian District Beijing100871 China Department of Astronomy School of Physics Peking University Beijing100871 China Department of Astronomy Yunnan University Kunming650091 China Department of Physics Faculty of Science Kunming University of Science and Technology Kunming650500 China National Astronomical Observatory of Japan National Institutes of Natural Sciences 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Departamento de Astronomía Universidad de Chile Casilla 36-D Santiago Chile Satyendra Nath Bose National Centre for Basic Sciences BlockJD Sector-III Salt Lake Kolkata700 106 India Korea Astronomy and Space Science Institute 776 Daedeokdaero Yuseonggu Daejeon34055 Korea Republic of 217 Gajeong-ro Yuseong-gu Daejeon34113 Korea Republic of Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan

A total of 64 ATOMS sources at different evolutionary stages were selected to investigate the kinematics and dynamics of gas structures under feedback. We identified dense gas structures based on the integrated intensity map of H13CO+ J=1-0 emission, and then extracted the average spectra of all structures to investigate their velocity components and gas kinematics. For the scaling relations between velocity dispersion σ, effective radius R and column density N of all structures, σ − N ∗ R always has a stronger correlation compared to σ − N and σ − R. There are significant correlations between velocity dispersion and column density, which may imply that the velocity dispersion originates from gravitational collapse, also revealed by the velocity gradients. The measured velocity gradients for dense gas structures in early-stage sources and late-stage sources are comparable, indicating gravitational collapse through all evolutionary stages. Late-stage sources do not have large-scale hub-filament structures, but the embedded dense gas structures in late-stage sources show similar kinematic modes to those in early- and middle-stage sources. These results may be explained by the multi-scale hub-filament structures in the clouds. We quantitatively estimated the velocity dispersion generated by the outflows, inflows, ionized gas pressure and radiation pressure, and found that the ionized gas feedback is stronger than other feedback mechanisms. However, although feedback from Hii regions is the strongest, it does not significantly affect the physical properties of the embedded dense gas structures. Combining with the conclusions in Zhou et al. (2023a) on cloud-clump scales, we suggest that although feedback from cloud to core scales will break up the original cloud complex, the substructures of the original complex can be reorganized into new gravitationally governed configurations around new gravitational centers. This process is accompanied by structural destruction and g

关键词： Gases

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Correction: Production and therapeutic use of astaxanthin in the nanotechnology era

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Pharmacological reports : PR 2023年第4期75卷 1043页

作者： Karim Abdelazim Amr Ghit Dina Assal Neamat Dorra Nehad Noby Sherine N Khattab Shaymaa Essam El Feky Ahmed Hussein Department of Biotechnology Institute of Graduate Studies and Research Alexandria University Alexandria Egypt. Department of Medicine and Aging Sciences "G. d'Annunzio" University of Chieti-Pescara Chieti Italy. Center for Advanced Studies and Technology "G. d'Annunzio" University of Chieti-Pescara Chieti Italy. Department of Biology Biotechnology Program American University in Cairo Cairo Egypt. Department of Microbiology and Immunology Faculty of Pharmacy Sinai University-Kantara Branch Ismailia Egypt. Chemistry Department Faculty of Science Alexandria University Alexandria Egypt. Radiation Sciences Department Medical Research Institute University of Alexandria Alexandria Egypt. Department of Biotechnology Institute of Graduate Studies and Research Alexandria University Alexandria Egypt. ahmed.hussein@alexu.edu.eg.

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Effects of galaxy environment on merger fraction

arXiv

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arXiv 2024年

作者： Pearson, W.J. Santos, D.J.D. Goto, T. Huang, T.-C. Kim, S.J. Matsuhara, H. Pollo, A. Ho, S.C.-C. Hwang, H.S. Malek, K. Nakagawa, T. Romano, M. Serjeant, S. Suelves, L. Shim, H. White, G.J. National Centre for Nuclear Research Pasteura 7 Warszawa02-093 Poland Max Planck Institute for Extraterrestrial Physics Giesenbachstrase 1 GarchingD-85748 Germany Institute of Astronomy National Tsing Hua University 101 Section 2. Kuang-Fu Road Hsinchu30013 Taiwan Department of Space and Astronautical Science Graduate University for Advanced Studies SOKENDAI Shonankokusaimura Hayama Miura District Kanagawa240-0193 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency 3-1-1 Yoshinodai Chuo-ku Sagamihara Kanagawa252-5210 Japan Research School of Astronomy and Astrophysics The Australian National University CanberraACT2611 Australia Centre for Astrophysics and Supercomputing Swinburne University of Technology P.O. Box 218 HawthornVIC3122 Australia OzGrav: The Australian Research Council Centre of Excellence for GravitationalWave Discovery HawthornVIC3122 Australia ASTRO3D: The Australian Research Council Centre of Excellence for All-sky Astrophysics in 3D ACT2611 Australia Astronomy Program Department of Physics and Astronomy Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of SNU Astronomy Research Center Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of INAF-Osservatorio Astronomico di Padova Vicolo dell'Osservatorio 5 PadovaI-35122 Italy School of Physical Sciences The Open University Walton Hall Milton KeynesMK7 6AA United Kingdom Department of Earth Science Education Kyungpook National University 80 Daehak-ro Buk-gu Daegu41566 Korea Republic of Space Science and Technology Division RALSpace STFC Rutherford Appleton Laboratory Chilton DidcotOX11 0QX United Kingdom

Aims. In this work, we intend to examine how environment influences the merger fraction, from the low density field environment to higher density groups and clusters. We also aim to study how the properties of a group or cluster, as well as the position of a galaxy in the group or cluster, influences the merger fraction. *** identified galaxy groups and clusters in the North Ecliptic Pole using a friends-of-friends algorithm and the local density. Once identified, we determined the central galaxies, group radii, velocity dispersions, and group masses of these groups and clusters. Merging systems were identified with a neural network as well as *** these, we examined how the merger fraction changes as the local density changes for all galaxies as well as how the merger fraction changes as the properties of the groups or clusters change. Results. We find that the merger fraction increases as local density increases and decreases as the velocity dispersion increases, as is often found in literature. A decrease in merger fraction as the group mass increases is also found. We also find groups with larger radii have higher merger fractions. The number of galaxies in a group does not influence the merger fraction. Conclusions. The decrease in merger fraction as group mass increases is a result of the link between group mass and velocity dispersion. Hence, this decrease of merger fraction with increasing mass is a result of the decrease of merger fraction with velocity dispersion. The increasing relation between group radii and merger fraction may be a result of larger groups having smaller velocity dispersion at a larger distance from the centre or larger groups hosting smaller, infalling groups with more mergers. However, we do not find evidence of smaller groups having higher merger fractions. Copyright © 2024, The Authors. All rights reserved.

关键词： Galaxies

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Constraints on sea-level rise during meltwater pulse 1B from the Great Barrier Reef

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Nature communications 2025年第1期16卷 4698页

作者： Jody M Webster Yusuke Yokoyama Marc Humblet Juan Carlos Braga Tezer Esat Stewart Fallon Edouard Bard Geocoastal Research Group School of Geosciences The University of Sydney Sydney NSW Australia. jody.webster@sydney.edu.au. Atmosphere and Ocean Research Institute and Department of Earth and Planetary Sciences The University of Tokyo Kashiwa Japan. Department of Earth and Planetary Sciences Graduate School of Science The University of Tokyo Tokyo Japan. Graduate Program on Environmental Sciences Graduate School of Arts and Sciences The University of Tokyo Tokyo Japan. Biogeochemistry Research Center Japan Agency for Marine-Earth Science and Technology Kanagawa Japan. Research School of Physics The Australian National University Canberra ACT Australia. Department of Earth and Planetary Sciences Graduate School of Environmental Studies Nagoya University Nagoya Japan. Department of Stratigraphy and Paleontology University of Granada Campus de Fuentenueva Granada Spain. Research School of Earth Sciences Australian National University Canberra ACT Australia. CEREGE Aix-Marseille University CNRS IRD INRAE Collège de France Technopôle de l'Arbois Aix-en-Provence France.

The timing, rate, and magnitude of rapid sea-level rise during Meltwater Pulse 1B (MWP-1B, ~11.45-11.1 ka) remain controversial. Robust constraints on past MWPs are crucial to future predictions of global ice sheet instability. Using 154 new and existing U/Th and calibrated C-AMS dates from coral, algae, and microbialites recovered during Integrated Ocean Drilling program Expedition 325, this study reconstructs reef development and relative sea-level (RSL) rise on the Great Barrier Reef (GBR). We identify 107 in situ RSL index points while refining estimates of vertical accretion and paleowater depth. Results show RSL rise during MWP-1B did not exceed 10.2-7.7 m or rates of 30-23 mm/yr, and was likely less. The GBR did not drown, indicating resilience to MWP-1B. These findings are more consistent with Tahiti and other Pacific records and do not support the Barbados record of MWP-1B as an abrupt step in global sea level, with a magnitude > 11 m.

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Physical characteristics of modified cassava flour wastewater at room temperature

Physical characteristics of modified cassava flour wastewate...

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International Conference on Food science and technology 2018, ICFST 2018

作者： Yaqin, N. Al-Baarri, A.N. Legowo, A.M. Widayat Budihardjo, M.A. Program of Environmental Science School of Post-Graduate Studies Diponegoro University Semarang Indonesia Food Technology Department Faculty of Animal and Agricultural Sciences Diponegoro University Semarang Indonesia Chemical Engineering Department Faculty of Engineering Diponegoro University Semarang Indonesia Center of Research and Services Diponegoro University Semarang Indonesia Department of Environmental Engineering Faculty of Engineering Diponegoro University Indonesia

Cassava is an agricultural material that is considered as important raw resources in the industrial sector. The benefits are even greater after being modified using lactic acid bacteria. However, the mocaf industry often causes water and air pollution. Environmental problems arise after the fermentation process. Determination problems with lightness, TDS (Total Dissolved Solid), conductivity and pH analysis are required to measure the impact to the environment. This research was used waste water from mocaf during 3 days fermentation. The wastewater had the highest color level (Lightness) on initial day of fermentation at 83.7±3.73 and then decrease along the day of fermentation at the averages of 65.2±2.0. The highest TDS was resulted from the mocaf wastewater at a value of 1218 ± 4.6 ppm which continued to decline until day 4. The conductivity and pH showed a decrease along the day of fermentation. As conclusion, physical characteristic of wastewater from mocaf production could be analyzed specifically and determined through color, TDS, conductivity, and pH. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Fermentation

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