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FARISKA, Putri,NUGRAHA, Nugraha,PUTERA, Ika,ROHANDI, Mochamad Malik Akbar,FARISKA, Putri Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.3
The covid-19 pandemic scenario caused the most extensive economic shocks the world has experienced in decades. Maintaining financial performance and economic stability is essential during the pandemic period. In these conditions, where movement is severely restricted, media consumption is considered to be increasing. The social media platform is one of the media online used by the public as a source of information and also expressing their sentiment, including individual investors in the capital market as social media users. Twitter is one of the social media microblogging platforms used by individual investors to share their opinion and get information. This study aims to determine whether microblogging sentiment investors can predict the capital market during pandemics. To analyze microblogging sentiment investors, we classified sentiment using the phyton text mining algorithm and Naïve Bayesian text classification into level positive, negative, and neutral from November 2019 to November 2020. This study was on 68 listed companies on the Indonesia stock exchange. A Vector Autoregression and Impulse Response is applied to capture short and long-term impacts along with a causal relationship. We found that microblogging sentiment investor has a significant impact on stock returns and volatility and vice-versa. Also, the response due to shocks is convergent, and microblogging investors in Indonesia are categorized as a "news-watcher" investor.
Putri, W. B. K.,Tran, D. H.,Lee, O. Y.,Kang, W. N.,Miyanaga, T.,Yang, D. S.,Kang, B. American Institute of Physics 2014 Journal of Applied Physics Vol.115 No.9
<P>Extended X-ray absorption fine structure (EXAFS) spectroscopy is a powerful method to investigate the local structure of thin films. Here, we have studied EXAFS of MgB2 films grown on SiC buffer layers. Crystalline SiC buffer layers with different thickness of 70, 100, and 130 nm were deposited on the Al2O3 (0001) substrates by using a pulsed laser deposition method, and then MgB2 films were grown on the SiC buffer layer by using a hybrid physical-chemical vapor deposition technique. Transition temperature of MgB2 film decreased with increasing thickness of SiC buffer layer. However, the T-c dropping went no farther than 100 nm-thick-SiC. This uncommon behavior of transition temperature is likely to be created from electron-phonon interaction in MgB2 films, which is believed to be related to the ordering of MgB2 atomic bonds, especially in the ordering of Mg-Mg bonds. Analysis from Mg K-edge EXAFS measurements showed interesting ordering behavior of MgB2 films. It is noticeable that the ordering of Mg-B bonds is found to decrease monotonically with the increase in SiC thickness of the MgB2 films, while the opposite happens with the ordering in Mg-Mg bonds. Based on these results, crystalline SiC buffer layers in MgB2 films seemingly have evident effects on the alteration of the local structure of the MgB2 film. (C) 2014 AIP Publishing LLC.</P>
Fluorinated benzothiadiazole-based small molecules for photovoltaic applications
Putri, Sella Kurnia,Lee, Min Seok,Chang, Dong Wook,Kim, Joo Hyun Elsevier 2016 Synthetic metals Vol.220 No.-
<P><B>Abstract</B></P> <P>A series of medium band gap conjugated small molecules with a typical D-π-A-π-D structure, in which triphenylamine, thiophene, and benzothiadiazole are used as an electron-donor, a bridge, and an electron-acceptor, respectively, have been synthesized. To investigate the effects of strong electron-withdrawing fluorine atoms on various properties, one and two fluorine substituents are introduced to the central benzothiadiazole unit of N-(4-(5-(7-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)benzo[c][1,2,5]thiadiazol-4-yl)thiophen-2-yl)phenyl)-N-phenylbenzenamine (<B>TPA-TBT</B>) to give <B>TPA-TBT-1F</B> and <B>TPA-TBT-2F</B>, respectively. Owing to the significant contributions of fluorine atoms, these small molecules exhibit clearly distinctive optical and electrochemical properties. Inverted-type organic photovoltaic cells (OPVs) with a configuration of ITO/ZnO/small molecules: PC<SUB>71</SUB>BM/MoO<SUB>3</SUB>/Al were fabricated and the fabricated cells showed maximum power conversion efficiencies of 0.84, 1.15 and 1.70% for <B>TPA-TBT</B>, <B>TPA-TBT-1F</B> and <B>TPA-TBT-2F</B>, respectively. The superior photovoltaic performance of <B>TPA-TBT-2F</B> is attributed to the relatively deep energy level of highest occupied molecular orbital (HOMO) and to more balanced electron- and hole-mobility within photoconversion layer. Therefore, this study can provide insights into the tuning the properties of benzothiadiazole-based small molecules by introducing fluorine substituents.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A series of medium band gap conjugated small molecules have been synthesized. </LI> <LI> Selective incorporation of fluorine atoms on the benzothiadiazole acceptors. </LI> <LI> Optical, electrochemical and photovoltaic properties have been investigated. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Putri Widyanti Harlina,Vevi Maritha,Ida Musfiroh,Syamsul Huda,Nandi Sukri,Muchtaridi Muchtaridi 한국축산식품학회 2022 한국축산식품학회지 Vol.42 No.5
The liquid chromatography mass spectrometry (LC-MS)-based metabolomic and lipidomic methodology has great sensitivity and can describe the fingerprint of metabolites and lipids in pork and beef. This approach is commonly used to identify and characterize small molecules such as metabolites and lipids, in meat products with high accuracy. Since the metabolites and lipids can be used as markers for many properties of a food, they can provide further evidence of the foods authenticity claim. Chromatography coupled to mass spectrometry is used to separate lipids and metabolites from meat samples. The research data usually is compared to lipid and metabolite databases and evaluated using multivariate statistics. LC-MS instruments directly connected to the metabolite and lipid databases software can be used to assess the authenticity of meat products. LC-MS has good selectivity and sensitivity for metabolomic and lipidomic analysis. This review highlighted the combination of metabolomics and lipidomics can be used as a reference for analyzing authentication meat products.
Putri, W.B.K.,Kang, B.,Ranot, M.,Lee, J.H.,Kang, W.N. The Korea Institute of Applied Superconductivity a 2014 한국초전도저온공학회논문지 Vol.16 No.2
We have grown $MgB_2$ on SiC buffer layer by using metallic Hastelloy tape as the substrate. Hastelloy tape was chosen for its potential practical applications, mainly in the power cable industry. SiC buffer layers were deposited on Hastelloy tapes at 400, 500, and $600^{\circ}C$ by using a pulsed laser deposition method, and then by using a hybrid physical-chemical vapor deposition technique, $MgB_2$ films were grown on the three different SiC buffer layers. An enhancement of critical current density values were noticed in the $MgB_2$ films on SiC/Hastelloy deposited at 500 and $600^{\circ}C$. From the surface analysis, smaller and denser grains of $MgB_2$ tapes are likely to cause this enhancement. This result infers that the addition of SiC buffer layers may contribute to the improvement of superconducting properties of $MgB_2$ tapes.
Putri Widyanti Harlina,Meihu Ma,Raheel Shahzad,Ibrahim Khalifa 한국축산식품학회 2022 한국축산식품학회지 Vol.42 No.4
The purpose of our study was to determine the impact of rosemary extract in duck eggs, as determined by in vitro antioxidant capacity, lipid oxidation, fatty acid profiles, and flavor analyses. Three groups of salted duck eggs were compared: A control group and group enriched with 0.1% and 0.5% (w/v) rosemary extracts for 28 days of salting. In a time-dependent manner, the radical scavenging activity and reduction power of eggs with 0.5% (w/v) rosemary extract were significantly higher those of the control at 28 days after salting. The fatty acid profiles of salted egg were significantly affected by rosemary extract and salting time. Palmitic acid was the most abundant fatty acid in salted egg treated with rosemary extract, followed by linoleic acid and arachidonic acid. Furthermore, the treated eggs contained more docosahexaenoic acid than the control ones. And the treated eggs also have a considerable impact on the lipid oxidation process (primary and secondary oxidation). As a result, rosemary extract can be used as a natural antioxidant spice to prevent oxidation and extend the shelf life of eggs during storage. Furthermore, flavor research using solid phase microextraction - gas chromatography - mass spectrometry and an electronic nose demonstrated that adding rosemary extract to salted eggs could give them a distinct flavor.
Putri Asri Insiana,Kartikawati Noor Khomsah,Nirsatmanto Arif,Sunarti Sri,Haryjanto Liliek,Herawan Toni,Santosa Purwanto Budi,Wahyuningtyas Reni Setyo,Lestari Fajar,Rimbawanto Anto 한국산림과학회 2023 Forest Science And Technology Vol.19 No.3
Gerunggang (Cratoxylum arborescens (Vahl) Blume) is a tree native to Indonesian peatlands that has great potential as an alternative fiber-producing species for the pulp and paper industry because it is adaptable and does not have the potential to disrupt local ecosystems. The species also contains important anti-cancer compounds for the pharmaceutical industry. These industries require large quantities of raw materials to meet their needs, which cannot be met by the supply of conventional plant seedlings. Tissue culture is one of the propaga- tion biotechnologies that can be used as an alternative to provide more efficient germplasm. In this study, we developed a protocol for gerunggang propagation using tissue culture technique. The results showed that the combination of 1 mg/l 6-benzylamino purine (BAP) and 0.5 mg/l naphthalene acetic acid (NAA) in Murashige & Skoog media provided the fast- est bud break time (2 weeks before the first subculture), with the highest shoot initiation (3.0 ± 0.2 cm), and after 4 weeks of incubation, the highest auxiliary shoot elongation (7.4 ± 0.1 cm). The significant effect of this hormone concentration also increases the nodule multiplication coefficient (NMC), which is 7.5. In vitro root response on the same propagation medium showed good growth with an average root length of 4.8 ± 0.2 cm. Acclimatization of plantlets was successful under ex vitro conditions and resulted in good growth after 2 and 3 months in the greenhouse. The advantage of applying the tissue culture method to gerunggang is that it can produce about seven times more seedlings from one explant in about 4 weeks. These results will be very useful for further research in the field and require a more intensive and comprehensive study.