| 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
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| 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
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| 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
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| 2022 |
Characterization, diversity, and effectiveness phosphate solubilizing bacteria from the soil and rhizosphere on the growth of Glycine max L. in greenhouse |
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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
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| 2022 |
Retarded boron and phosphorus diffusion in silicon nanopillars due to stress induced vacancy injection |
Jan K. Prüßing, Tim Böckendorf, Felix Kipke, Jiushuai Xu, John Lundsgaard Hansen, Dominique Bougeard, Erwin Peiner, and Hartmut Bracht |
Phosphorus and boron diffusion in silicon at temperatures between 900 and 1050 C was studied both in bulk and nanostructured samples by means of scanning spreading resistance microscopy. The dopant diffusion from highly doped silicon substrates into 300–1200 nm diameter natural silicon nanopillars is clearly retarded compared to dopant diffusion in the bulk material. A three-dimensional solution of Fick’s equation enables a better understanding of dopant diffusion processes in silicon nanostructures, including all participating point defects. The observed decrease of diffusivity by 20%–50% can be explained by the injection of vacancies at the sidewalls of the pillar. The results do… |
Lihat
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| 2022 |
The Effect of LiBOB Addition on Solid Polymer Electrolyte (SPE) Production based PVDF-HFP/TiO2/LiTFSI on Ionic Conductivity for Lithium-Ion Battery Applications |
Titik Lestariningsih, Qolby Sabrina, Christin Rina Ratri, Achmad Subhan, dan Slamet Priyono |
SPE (Solid Polymer Electrolyte) is an alternative to substitute conventional liquid
electrolytes as it has a better safety level and has been produced using the solution
casting method. An effort to increase the SPE conductivity of the PVDF-HFP/TiO2/
LiTFSI system has been carried out by adding LiBOB as an additive. LiBOB (lithium
bis(oxalate) borate) is a salt compound that can interfere with the crystallization
process of polymer chains, so it is expected to increase ion conductivity. However,
the results showed a decrease in the conductivity from 3.643 x 10-5 S/cm to 8.658
x 10-6 S/cm. These results were proven by… |
Lihat
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| 2022 |
Ex-Situ Conservation Of Flora Sulawesi In Indonesian Botanic Gardens |
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Indonesian Botanic Gardens (IBGs) consist of forty-three gardens which represent distinct characteristic of Indonesian ecoregions. Thousands living collection native to Sulawesi are exist at IBGs. This study aims to reveal the Sulawesi’s collections in IBGs and compared to vascular plants species across the island. The conservation status of those collections are also uncovered. Plant collections data are obtained from seven IBGs, namely Bogor Botanic Garden (BG), Purwodadi BG, Bali BG, Enrekang BG, Kendari BG, Parepare BG, and Pucak BG. A number of 1,561 species originated from Sulawesi (26,3% of total Sulawesi’species) are cultivated within seven IBGs. 1,477 species of which… |
Lihat
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| 2022 |
Genetic diversity analysis of Castanopsis argentea using random amplified polymorphic DNA markers |
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. Castanopsis argentea (Blume) A.DC., commonly known as saninten, is an endangered evergreen tree species
native to Sumatra and Java Islands, Indonesia. This study was carried out to assess the genetic diversity of C. argentea in
Mount Gede Pangrango National Park (MGPNP) based on random amplified polymorphic DNA markers. The samples of
C. argentea were collected from six locations in MGPNP. The results showed that from 19 selected random primers used,
13 primers, i.e. OPA-4, OPA-7, OPA-9, OPB-1, OPB-7, OPB-8, OPC-5, OPC-8, OPE-1, OPE-4, OPE-6, OPE-7, and
OPE-8 gave reproducible amplification banding patterns. The polymorphic information content was highest for… |
Lihat
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| 2022 |
The new record of Heteropilumnus sasekumari (Serène, 1971) and Aniptumnus quadridentatus (De Man, 1895) (Crustacea, Decapoda, Brachyura, Pilumnidae) from mangrove habitat in Papua, Indonesia |
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Based on morphological evidence, we report a new record of Heteropilumnus sasekumari (Serène,
1971) for the first time in Indonesian water, and the third record of Aniptumnus quadridentatus (De Man,
1895) after its description from Pontianak and record from Singapore. These two species were collected from
mangrove habitat in Timika, Papua, Indonesia. The female gonopore of these two species are described and
illustrated for the first time in this paper. |
Lihat
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| 2022 |
Dissolved Oxygen in the East Bolaang Mongondow Waters, North Sulawesi |
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Oxygen in seawater comes from the air through diffusion and photosynthesis. This study aims to determine the dissolved oxygen content, NAEC (Normal Atmospheric Equilibrium Concentration), and AOU (Apparent Oxygen Utilization) in East Bolaang Mongondow waters. The analysis showed that the dissolved oxygen content in the surface layer ranged from 6.01-7.05 mg/l; 5.91-6.98 mg/l (5 m depth); and 5.75-6.90 mg/l (near bottom depth). NAEC is closely related to water temperature and implicitly increases with depth. The highest NAEC value of 5.90 mg/l (t=28.0ºC) was found at the bottom depth, and the lowest NAEC of 5.63 mg/l (t=30.0ºC) was found at the… |
Lihat
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