Preparation of Submicron- and Nanometer-Sized Particles of Y₂O₃:Eu³⁺ by Flame Spray Pyrolysis Using Ultrasonic and Two-Fluid Atomizers

Purwanto, Agus,Lenggoro, I. Wuled,Chang, Hankwon,Okuyama, Kikuo The Society of Chemical Engineers, Japan 2006 Journal of chemical engineering of Japan Vol.39 No.1

<P>Submicron- and nanometer-sized red luminescent particles (Y<SUB>2</SUB>O<SUB>3</SUB>:Eu<SUP>3+</SUP>) were successfully generated by flame spray pyrolysis (FSP) and the effect of the type of the atomizer, i.e., the ultrasonic nebulizer (UN) and the two-fluid nozzle (TFN) sprayer, on the particle characteristics was investigated. The prepared particles were characterized by field emission-scanning electron microscopy (FE-SEM), an X-ray diffractometry (XRD) analysis and spectrophotometry. UN-FSP produced non aggregated particles with a mean diameter of 754 nm and the relative photoluminescence (PL) intensity (ratio of emission intensity of generated particles to that of commercial particles) varied from 0.36 to 1.01. The Y<SUB>2</SUB>O<SUB>3</SUB>:Eu<SUP>3+</SUP> particles generated by TFN-FSP were softly agglomerated with a mean diameter of 24 nm and the relative PL intensity ranged from 0.21 to 0.24. Regardless of the type of the atomizer used, the generated particles were dense and spherical in the cubic phase and highly crystalline. These results show that TFN-FSP is a versatile method of producing Y<SUB>2</SUB>O<SUB>3</SUB>:Eu<SUP>3+</SUP> nanometer-sized particles compared with UN-FSP.</P>

Simple and Sensitive Paper-based Colorimetric Biosensor for Determining Total Polyphenol Content of the Green Tea Beverages

Mochammad Amrun Hidayat,Diah Ayu Maharani,Djoko Agus Purwanto,Bambang Kuswandi,Mochammad Yuwono 한국생물공학회 2020 Biotechnology and Bioprocess Engineering Vol.25 No.2

A simple paper-based colorimetric biosensor based on immobilized tyrosinase and 3-methyl-2- benzothiazolinone hydrazone (MBTH) was developed for assessing total polyphenol content (TPC) of various green tea beverages. The patterned biosensing zone of the paperbased biosensor showed a sensitive response to catechin (a typical green tea polyphenol) by generating pink color adducts that can be captured for further color image analysis using a scanometric method. This color change can be connected to the TPC of the samples. The analytical performance of the biosensor in scanometric set-up was optimized. The biosensor showed a response time of 13 min in the linear range between 0.08-1.03 mM of catechin (r = 0.9979). The detection limit (LOD) of the biosensor was 0.071 mM while reproducibility was found at 3.11% RSD (relative standard deviation). TPC of green tea beverages was assessed by the biosensor, and the results were in accordance with the UV/Vis spectrophotometric method.

The identification of macro nutrient status of superior teak plantation (Tectona grandis Lin.F) by means of DRIS norms (Diagnosis and Recommendation Integrated System) in Indonesia

Mochamad Chanan,Suryo Hardiwinoto,Cahyono Agus,Ris Hadi Purwanto,Sugi Purwanta 한국산림과학회 2019 Forest Science And Technology Vol.15 No.1

The improvement in forest productivity by considering the balance of nutrient input-output is the proper choice. This research aimed at investigating the macro nutrient status of a teak plantation in Indonesia. The quantitative measurement of the nutritional status of a plantation was done by picking sample plantations and doing laboratory analysis. The determination of macronutrition status was conducted by means of Diagnosis and Recommendation Integrated System (DRIS), that is a diagnostic method to measure the balance of nutrients before designing silvicultural treatments. Index analysis on teak has resulted in a macronutrient index (N, P, K, Ca, and Mg); respectively –8.40, –1.70, –4.17, 4.98 and 9.28. The availability levels of nutrients from the highest to the lowest were Mg>Ca>P > K>N. Mg and Ca have shown positive index values; this implies that the nutrients are sufficient. N, K, and P have shown negative index values; this implies that the nutrients are less available, and thus growth-limiting nutrients for teak. It is recommended that silvicultural treatments be conducted on teak by means of balanced nutrient inputs, to be specific N, P, and K to achieve maximum growth of teak.

The Role of Business Capabilities in Supporting Organization Agility and Performance During the COVID-19 Pandemic: An Empirical Study in Indonesia

Albert Surya WANASIDA,Innocentius BERNARTO,Niko SUDIBJO,Agus PURWANTO 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5

This study aims to analyze the important role of business analytics capability, information quality, and innovation capability in influencing organization agility and organization performance during the Covid-19 pandemic. Data was collected from 76 companies from various sectors in Indonesia. Structural Equation Model-Partial Least Square (SEM-PLS) analysis was conducted to analyze the relationship between variables and test a series of hypotheses. Importance-Performance Matrix Analysis (IPMA), a useful analysis approach in PLS-SEM, is used, which extends the results of the estimated path coefficient (importance) by adding a dimension that considers the average values of the latent variable scores (performance). The IPMA approach examines not only the performance of an item but also the importance of that item. The results show that business analytics capability has a significant effect on information quality and innovation capability which then affects organization agility. Organizational performance is influenced by organizational agility. IPMA results show that organizational agility has the highest level of impact on organizational performance. This study will assist companies in planning business analytics, improving information quality, increasing innovation capability, and ultimately increasing agility and performance during the Covid-19 pandemic. This study will add to existing knowledge about previous literature, especially in the Covid-19 pandemic situation.

Perceptions, Attitudes, and Interests of Halal Tourism: An Empirical Study in Indonesia

Juliana JULIANA,Amelda PRAMEZWARY,Nonot YULIANTORO,John Tampil PURBA,Rudy PRAMONO,Agus PURWANTO 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.7

The aim of this study is to analyze the correlation between concept perceptions and people’s attitudes in halal tourism, development perceptions and people’s attitudes, attitude and people’s interest, concept perceptions and people’s interest, development perceptions and people’s interest, concept perceptions and people’s interest, and development perceptions and people’s interest. The method used in this research is SEM (Structural Equation Modeling) method. The population in this study was all Banten people. The samples in this study were respondents in five districts/cities in Banten, namely Tangerang (127 respondents), Serang (63 respondents), Pandeglang (97 respondents), Lebak (69 respondents), and Tangerang City (62 respondents). The sampling technique used is cluster random sampling. The data collection method used by researchers is a survey through filling out an online questionnaire. Based on regression test results shows concept perceptions has a significant effect on people’s attitudes Development perceptions has no significant effect on people’s attitudes, the attitude has no significant effect on people’s interest, concept perceptions have no significant effect on people’s interest, development perceptions have no significant effect on people’s interest. Concept perceptions have no significant effect on people’s interests through people’s attitudes. Development perceptions have no significant effect on people’s interests through people’s attitudes.

Determinants of the Small and Medium Enterprises Progress: A Case Study of SME Entrepreneurs in Manado, Indonesia

Rudy PRAMONO,L. W. SONDAKH,Innocentius BERNARTO,Juliana JULIANA,Agus PURWANTO 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.1

The purpose of this study is to descriptively reveal the demographic and business profile and personal-entrepreneurial characteristics in Manado, the capital of North Sulawesi, and secondly to associate these profiles and characters to their business progress. A sample size of 21 respondents was drawn - selected from those who warmly welcomed the interviewers for an open-ended structured questionnaire. SPSS 24 has been employed to descriptively reveal the sample distribution according to demographic factors and business entities and to determine the dominant factors affecting the progress of the business by testing the hypothesis on the association of variables under study using specified statistical analytical tools, such as regression analysis, especially stepwise regression formula, between specified dependent variables and independent variables and /or between all variables. The stepwise regression analysis has enabled the researcher to determine which variables are the most important reflecting the personal characteristics theorized as “locus of control”: self-efficacy, needs for achievement, personal traits, and barriers to business progress The analysis reveals that the progress of business does have an association and is dependent on the source of capital and education, needs for achievement and locus of control.

Halal Tourism in Indonesia: An Indonesian Council of Ulama National Sharia Board Fatwa Perspective

ADINUGRAHA, Hendri Hermawan,NASUTION, Ismail Fahmi Arrauf,FAISAL, Faisal,DAULAY, Maraimbang,HARAHAP, Ikhwanuddin,WILDAN, T.,TAKHIM, Muhamad,RIYADI, Agus,PURWANTO, Agus Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.3

The phenomenon of sharia-based tourism development has now become a necessity for the people of Indonesia and even for the global community. Therefore, we need rules and regulations that govern it, both rules relating to normative sharia and regulations governing implementation in a positive legal manner. The purpose of this research is to describe halal tourism in Indonesia in terms of the Indonesian Council of Ulama National Sharia Board (DSN-MUI) fatwa and the government regulation. This research is a conceptual review that uses literature research methods sourced from authoritative journals, books and documents and is still relevant to the study of halal tourism. The results showed that the large number of public requests for halal tourism visits in Indonesia resulted in the need for normative and positive regulation that regulates. Finally, the MUI issued and stipulated fatwa Number: 108/DSN-MUI/IX/2016 regarding the implementation of tourism based on sharia principles and West Nusa Tenggara Regional Regulation Number. 2 of 2016 concerning Halal Tourism. Overall, the halal tourism indicator according to the DSN-MUI fatwa Number: 108/DSN-MUI/X/2016 and West Nusa Tenggara Regional Regulation Number. 2 of 2016 the content is almost the same and interrelated with one another. The only difference is in the use of the term "sharia tourism" in the DSN- MUI fatwa while the content in the regional regulation (PERDA) uses the term "halal tourism".

The Effect of Strategic Leadership and Organization Culture on Business Performance

Munawaroh MUNAWAROH,Budi SANTOSO,Risa Ratna GUMILANG,Deny HIDAYATULLAH,Adam HERMAWAN,Sri MARHANAH,Arie GUNAWAN,Denok SUNARSI,Agus PURWANTO 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.6

Competitive Strategy is defined as the long-term plan of a particular company to gain a competitive advantage over its competitors in the industry. The purpose of this study was to determine the effect of strategic leadership on competitive strategy, motivation on competitive strategy, organization culture on competitive strategy, strategic leadership on business performance, motivation on business performance, organization culture on business performance, and competitive strategy on business performance. The analytical method used in this research is structural equation modeling (SEM) to determine the causal relationship between latent variables contained in structural equations. The analysis tool used is with the help of Smart PLS. The method used in this research is quantitative, and the data collection method is by distributing questionnaires to manufacturing industry employees electronically using a simple random sampling technique. The results of the questionnaire returned were 150 respondents. Based on the data analysis, it was concluded that strategic leadership had no significant effect on competitive strategy. strategic leadership has a significant effect on business performance, organizational culture has a significant effect on business performance, organizational culture has a significant effect on competitive strategy. Motivation has a significant effect on competitive strategy, motivation has no significant effect on business performance. The competitive strategy has no significant effect on business performance.