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Utilization of Microbial Fuel Cells to generate electrical energy from tanning industry waste treatment

AIP Conference Proceedings 2022年第1期2645卷

作者： Indah Tri Rizky Bagas Hadi Pratomo Wisik Adelina Muhammad Azmir Novita Sukma Ayatillah Riyanto 1Undergraduate Program of Chemistry Universitas Islam Indonesia Yogyakarta Indonesia 2Undergraduate Program of Environmental Engineering Universitas Islam Indonesia Yogyakarta Indonesia 3Undergraduate Program of Chemistry Engineering Universitas Islam Indonesia Yogyakarta Indonesia 4Undergraduate Program of Electrical Engineering Universitas Islam Indonesia Yogyakarta Indonesia 5Lecturers Program of Chemistry Universitas Islam Indonesia Yogyakarta Indonesia 6Lecturers Program of Chemistry Universitas Islam Indonesia Yogyakarta Indonesia

The leather tanning industry is known as an industry that is not environmentally friendly because it produces a lot of waste in the process. The resulting liquid waste contains heavy metal chromium (Cr), high chemical oxygen demand (COD), and several other nutrient compounds that can be decomposed by microorganism. By utilizing Microbial Fuel Cell (MFC) or microbe-based electrochemical cells, this is an example of alternative technology that can be developed as replacement energy because this fuel cell converts chemical energy into electrical energy using microorganisms. In the research conducted, MFC Dual Chamber was used with aluminum as the electrode and there were two substrates, namely glucose as a nutrient and rice field mud as a biocatalyst from microbes found in tannery wastewater. After observing the value of electric power which shows the existence of an electric potential, in variation 1, namely liquid waste from leather tanning with glucose substrate and rice field mud, the power is 167.13 Watts. As for variation 2, which is liquid waste from tanning leather with glucose substrate, the power obtained is 48.11 Watt, and for the last variation, namely the three liquid wastes from tanning leather with rice field mud substrate, the resulting power value is 13.54 µWatt. From the results of research that has been carried out, it is proven that the treatment of leather tanning liquid waste using the MFC Dual Chamber method can generate electrical potential. And with the addition of substrate in the form of rice field mud and glucose as a source of microbes and nutrients for liquid waste can produce a higher electrical potential.

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Characterization, differentiation, and population doubling time of Wharton’s jelly mesenchymal stem cells (WJ-MSCs) in passage 5 and 8

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AIP Conference Proceedings 2021年第1期2344卷

作者： Rizal Rahimi Syaidah Ziyan Muhammad Aqsha Adella Josephin Vidi Miranda Pakpahan 1Biomedical Engineering program Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia 2Department of Histology Faculty of Medicine Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia 3Undergraduate Program in Biomedical Engineering Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia

Wharton’s jelly mesenchymal stem cells (WJ-MSCs) is proposed to be the best source of mesenchymal stem cells (MSCs). It has better self-renewal and differentiation capacity compare to adult stem cells such as bone marrow- derived stem cells (BM-MSCs). However, their characteristics in different passages do not yet well described. This research aims to isolate and characterize WJ-MSCs with regard to their proliferation capacity, immunophenotypes, and differentiation capacity. The WJ-MSCs were isolated by the explant method. The cultured WJ-MSCs at P5 and P8 were then characterized using flow cytometric analysis with regard to its surface marker, which are CD44, CD90, CD105, CD73, and negative lineages. The proliferation capacity of WJ-MSCs was analyzed with the population doubling time method and the characterized cells were differentiated into three different lineages. The result revealed that the isolated cells highly express MSCs surface marker with >98% for all surface markers and 0.00% for negative lineages. Isolated WJ-MSCs also exhibited a high proliferation capacity with a range of 1.06 to 1.59 days. Both passages revealed excellent differentiation capacity into chondrocytes, adipocytes, and osteocytes.

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Explore type and concentration of Indonesian propolis wax in inhibiting Candida albicans: In vitro study anti-candidiasis

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AIP Conference Proceedings 2019年第1期2193卷

作者： Robiatul Adawiyah Muhamad Sahlan Sri A. Soekanto Diah K. Pratami Faiqueen D. S. F. Adnan Silvana Saputri Redita N. Putri Siti Farida 1Parasitology Department Faculty of Medicine Universitas Indonesia Jakarta 10430 Indonesia 2Parasitology Clinical Program Faculty of Medicine Universitas Indonesia Jakarta 10430 Indonesia 9Research Center for Biomedical Engineering Faculty of Engineering Universitas Indonesia Depok West Java 16425 Indonesia 3Department of Chemical Engineering Majoring Technology Bioprocess Faculty of Engineering Universitas Indonesia Depok West Java 16424 Indonesia 4Faculty of Dentistry Universitas Indonesia Jakarta 10430 Indonesia 5Lab of Pharmacognosy and Phytochemistry Faculty of Pharmacy Pancasila University Jakarta 12640 Indonesia 6Undergraduate program Faculty of Medicine Universitas Indonesia Jakarta Indonesia 7Department of Medical Pharmacy Faculty of Medicine Universitas Indonesia Jakarta 10430 Indonesia 8Drug Development Cluster Indonesia Medical Education and Research Institute Universitas Indonesia Jakarta 10430 Indonesia

Candida sp. is the most aetiology of superficial and systemic fungal infection in human. The rising number of Candida albicans resistant as antifungal has drawn attention to a new alternative treatment’s finding. Natural substances like propolis become a preferred option due to the expectation of having fewer side effects. Propolis as one substance products of bees, containing polyphenols and flavonoids was already known to have anti-inflammatory, anti-viral, antioxidant, and antimicrobial activities. Propolis wax from Sulawesi, Indonesia has never been tested on Candida albicans. The aim of this study is to determine the best concentration of propolis, which effective against Candida albicans. This study was conducted at the Parasitology Laboratory, Faculty of Medicine, Universitas Indonesia. Candida albicans on Mueller-Hinton agars were tested to a disk diffusion that contains three types of Propolis wax (regular, coral, mixed) with different concentrations, 1%, 5%, and 7%. The result indicated that 5% and 7% were the effective concentration for every type of propolis wax and no difference between the type of Propolis wax (Kruskal Wallis and Mann Whitney). Propolis wax at concentration 5% and 7% could be an alternative substance in overcoming candidiasis infections.

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Architecture for a Mobile Lunar Base Using Lunar Materials

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AIP Conference Proceedings 2006年第1期813卷 1022-1029页

作者： David V. Smitherman, Jr. Vinay Dayal Daniel J. Dunn, II 1Advanced Projects Office NASA Marshall Space Flight Center Huntsville AL 35812 2Department of Aerospace Engineering Iowa State University Ames IA 50011 3Undergraduate Student Research Program NASA Marshall Space Flight Center Huntsville AL 35812

During the summers of 2004, and 2005, several studies were conducted in the Future Concepts Office at the NASA Marshall Space Flight Center (MSFC) with assistance from summer faculty and student program participants to develop concepts and architectures for mobile lunar habitats. This work included conceptual designs for a launch architecture derived from existing expendable launch systems; a lunar walker based on existing technology for the robotics; compatible hardware from the International Space Station (ISS) program for pressurized modules; and lunar resources utilization for environmental shielding. This paper provides a brief summary of some of the key findings from these studies, and identifies areas for future work that could lead to more robust lunar exploration architectures in the future. In conclusion, it is recommended that future exploration missions consider reusable depot / transfer vehicles, robotic walking technology for lunar exploration, and lunar resources utilization for environmental shielding of surface habitats.

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Hybrid Robotic Habitat for Lunar Exploration

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AIP Conference Proceedings 2005年第1期746卷 1078-1087页

作者： David Smitherman Masoud Rais‐Rohani Daniel Dunn Don Perkinson 1Advanced Projects Office NASA Marshall Space Flight Center Huntsville AL 35812 2Department of Aerospace Engineering Mississippi State University Mississippi State MS 39762 3Undergraduate Student Research Program NASA Marshall Space Flight Center Huntsville AL 35812 4Sverdrup Huntsville AL 35812

During the summer of 2004, several studies were conducted in the Advanced Projects office at the NASA Marshall Space Flight Center (MSFC) related to the development of walking habitats for lunar exploration. This work included conceptual designs for a walker based on existing technology for the robotics as well as the International Space Station (ISS) hardware for pressurized modules; engineering simulations for the overall architectural configuration and mission architecture development; preliminary designs for the pressure vessel and shielding using new composite technologies (as opposed to aluminum); and, ongoing development of computer models containing mass statements for various architecture options. This paper provides a brief summary of some of the key findings from these studies, and identifies areas for future work that will lead to more robust lunar exploration architectures in the future. In conclusion, it is recommended that lunar walking technology be developed for future exploration missions and that polyethylene and carbon reinforced polymer composite materials be used to develop lightweight structures and space environmental shielding.

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