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2022 Growth performance and prediction of carcass production of captive javan porcupine (Hystrix javanica) Porcupines are unique mammals, their upper body is covered with hard hair resembling sharp cylindrical spines and belongs to the order Rodentia. It has long been used as a source of animal protein. Javan porcupine (Hystrix javanica) is an endemic animal on Java and its population is estimated to continue, due to habitat destruction, poaching, and its use without a conservation. Observations on the growth of young javan porcupines were carried out for 12 months in Small Mammal Captivity, Research Center Biology - Indonesian Institute of Sciences. This study aims to determine the growth performance of young porcupines in captivity… Lihat
2022 Morphological and Anatomical Variations among Alocasia alba Schott Accessions in Bali Botanic Garden Eka Fatmawati Tihurua,Ni Putu Sri Asih,Ema Hendriyani,Ni Putu Sri Asih,Ema Hendriyani Alocasia alba Schott is a member of Macrorrhizos group from Aroid family that has conserved in Bali Botanic Garden. On its development, the collections showed varied morphological diversity on leaves and flowers. The aim of this study is to fill the knowledge gap in morphology and anatomy of the species A. alba and to know the phenotypic variation in this species. A total of eight A. alba accessions from Java, Bali and West Nusa Tenggara were observed in morphological and anatomical characters. The result showed that the eight accessions of A. alba have some variations in morphological and anatomical characters.… Lihat
2022 Bioremediation of perfuorochemicals: current state and the way forward Risky Ayu Kristanti,Kuok Ho Daniel Tang Perfuorochemicals are widely found in the environment due to their versatile uses and persistent nature. Perfuorochemicals have also been detected in human and animals due to direct or indirect exposures, giving rise to health concerns. This review aims to examine the bioremediation of perfuorochemicals with plants, bacteria and fungi, including their efciency and limitations. It also aims to propose the future prospects of bioremediation of perfuorochemicals. This review retrieved peerreviewed journal articles published between 2010 and 2021 from journal databases consisting of Web of Science, Scopus and ScienceDirect. This review shows that multiple Pseudomonas species could degrade perfuorochemicals particularly perfuoroalkyl… Lihat
2022 Grain growth kinetics and hardness empirical model of 253 MA austenitic stainless steel after multi-pass cold rolling Rana K. Melinia, Eddy S. Siradj This study investigated changes in the average grain size and hardness values of 253 MA austenitic stainless steel (ASS) and determined the grain growth kinetics as well as a hardness empirical model. A 35% multi-pass cold rolling process was employed to reduce the thickness of a 253 MA austenitic stainless steel pipe. Then, the rolled steel was annealed at 1100 °C for various soaking times of 0, 900, 1800, 2700, and 3600 s in a tubular furnace under a hydrogen atmosphere, followed by quenching to room temperature in the cool zone of the furnace. Then, micro-Vickers hardness measurements were done… Lihat
2022 Designed protein multimerization and polymerization for functionalization of proteins Dani Permana,Herlian Eriska Putra,Djaenudin Multimeric and polymeric proteins are large biomacromolecules consisting of multiple protein molecules as their monomeric units, connected through covalent or non-covalent bonds. Genetic modification and post-translational modifications (PTMs) of proteins offer alternative strategies for designing and creating multimeric and polymeric proteins. Multimeric proteins are commonly prepared by genetic modification, whereas polymeric proteins are usually created through PTMs. There are two methods that can be applied to create polymeric proteins: self-assembly and crosslinking. Self-assembly offers a spontaneous reaction without a catalyst, while the crosslinking reaction offers some catalyst options, such as chemicals and enzymes. In addition, enzymes are excellent catalysts because… Lihat
2022 Even-denominator fractional quantum Hall state in conventional triple-gated quantum point contact Mohammad Hamzah Fauzi,Yasuaki Hayafuchi, Ryota Konno, Annisa Noorhidayati, Mohammad Hamzah Fauzi, Naokazu Shibata, Katsushi Hashimoto, and Yoshiro Hirayama The even-denominator states have attracted considerable attention owing to their possible applications in future quantum technologies. In this letter, we first report a 3/2 diagonal resistance, indicating the existence of a 3/2 state in a nanometer-sized triple-gated quantum point contact (QPC) fabricated on a high-mobility (not ultra-high-mobility) single-layer two-dimensional (2D) GaAs wafer. The center gate plays a crucial role in realizing the QPC's 3/2 state. Our observation of the 3/2 state using a conventional QPC device, which is a suitable building block for semiconductor quantum devices, paves a new path for the development of semiconductor-based quantum technologies. Lihat
2022 Influence of ensiling and tannins addition on rumen degradation kinetics of soy sauce residues Sadarman, Irawan A, Ridla M, Jayanegara A, Nahrowi, Ridwan R, Darma ING, Wahyono T, Febrina D, Harahap RP, Nurfitriani RA, Adli DN Condensed tannins (CT) and hydrolyzable tannins (HT) are secondary metabolites substances that are widely proposed as safe additives to improve protein utilization in ruminants. This study aimed to investigate the effect of tannins extracted from acacia and chestnut on the degradation kinetics of ensiled and non-ensiled soy sauce residue (SSR) in sacco. Two fistulated beef cattle (425±25 kg) fed a diet consisting of 80% Pennisetum purpureum and 20% concentrate was used to incubate the SSR samples (ensiled and non-ensiled) using a 6×11 cm standard nylon bag. Each SSR sample was added with 2% CT and HT, respectively. Soy sauce residue… Lihat
2022 Characterization, diversity, and effectiveness phosphate solubilizing bacteria from the soil and rhizosphere on the growth of Glycine max L. in greenhouse . The research was conducted to know the diversity, characterization, and effectiveness of phosphate solubilizing bacteria from the soil and rhizosphere on the growth of Glycine max L. in a greenhouse. The study aims to know the population, get the pure culture of phosphate solubilizing bacteria, and obtain isolates potential of the soybean growth. Isolation was done in medium Pycosvkaya. The growth characteristic of pure culture was observed using Pikovskaya medium; the clear zone surrounding the colonies indicates that the phosphate in the medium was hydrolyzed. The experiment aimed to assess the potency of the Phosphate Solubilizing Bacteria to increase the… Lihat
2022 Modeling of Surface Runoff Estimation in Tropical Palm Dates Plantations: A Case Study in Aceh Province, Indonesia Devianti, Syahrul, Dian Kamisna, Dewi Sartika Thamren One of the most popular surface runoff estimation methods is the rational method. Unfortunately, this method has several concentration-time approaches that have been developed, as one of the parameters, which are specific to the environment to increase the accuracy of the runoff estimation. Therefore, this study aims to estimate surface runoff using a rational method with several concentration-time approaches in order to obtain the best accuracy in tropical palm dates plantations in Aceh Province, Indonesia. The concentration-time approaches studied were Kerby, Kirpich, Manning, Bransby Williams, Federal Aviation Agency (FAA), and Natural Resources Conservation Service (NRCS). This research was conducted by… Lihat
2022 Tannic acid as a novel and green leaching reagent for cobalt and lithium recycling from spent lithium‑ion batteries Widya Aryani Muryanta, Astria Gesta Anggraini Tannic acid–acetic acid is proposed as novel and green chemicals for cobalt and lithium recycling from spent lithium-ion batteries through a leaching process. The synergism of both acids was documented through batch and continuous studies. Tannic acid promotes cobalt dissolution by reducing insoluble Co3+ into soluble Co2+, while acetic acid is critical to improve the dissolution and stabilize the metals in the pregnant leach solution. Based on batch studies, the optimum conditions for metal recovery at room temperature are acetic acid 1 M, tannic acid 20 g/L, pulp density 20 g/L, and stirring speed 250 rpm (94% cobalt and 99%… Lihat