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| 1 | Reaction kinetics modeling for lithium and cobalt recovery from spent lithium-ion batteries using acetic acid显示文摘Lithium and cobalt recovery from spent lithium-ion batteries(LIBs) is a major focus because of their increased production and usage. The conventional method for recycling spent LIBs using inorganic acids produces harmful byproducts. In this work, the leaching agent was substituted with a less expensive and more environmentally friendly alternative—acetic acid—and a mathematical model was developed to describe the kinetics of the recovery process. The variables used were the pH value, temperature, H_2O_2 concentration, and the solid-to-liquid(S/L) ratio. The mathematical model used was the shrinking core model, which was modified to accommodate an equilibrium reaction. The experimental results show that the rate of recovery of Li and Co over time was only affected by temperature. The leaching behaviors of Li and Co were found to oppose each other. An increase in temperature resulted in increased recovery of Li but decreased recovery of Co because of the product-favoring endothermic reaction of Li and the reactant-favoring exothermic reaction of Co. The product of Li has a lower entropy value than the reactant as a free-moving ion, whereas the product of Co leaching has a higher entropy value as a stiff crystal complex. Thus, temperature conditioning is a pivotal factor in the leaching of spent LIBs. | Hendrik Setiawan Himawan Tri Bayu Murti Petrus Indra Perdana | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，1： | 9 |
| 2 | Association of core promoter mutations of hepatitis B virus and viral load is different in HBeAg(+) and HBeAg(-) patients显示文摘AIM:To identify the prevalence of hepatitis B e antigen (HBeAg) and to assess the association of hepatitis B virus (HBV) core promoter mutations and viral load in Indonesian patients.METHODS:Sixty-four patients with chronic hepatitis,65 with liver cirrhosis and 50 with hepatocellular carcinoma were included in this study.HBeAg and hepatitis B e antibody (HBeAb) tests were performed using enzyme-linked immunosorbent assay and the mutations were analyzed by sequencing.Viral load was measured by real-time polymerase chain reaction.RESULTS:Of 179 patients,108 (60.3%) were HBeAg(-) and 86 (79.6%) of these HBeAg(-) patients had been seroconverted.The A1896 mutation was not found in HBeAg(+) patients,however,this mutation was detected in 70.7% of HBeAg(-) patients.This mutation was frequently found when HBeAg was not expressed (87.7%),compared to that found in HBeAg seroconverted patients (65.1%).The A1899 mutation was also more prevalent in HBeAg(-) than in HBeAg(+) patients (P=0.004).The T1762/A1764 mutation was frequently found in both HBeAg(+) and HBeAg(-) patients,however,the prevalence of this mutation did not significantly differ among the two groups (P=0.054).In HBeAg(+) patients,the T1762/A1764 mutation was correlated with lower HBV DNA (P < 0.001).The A1899 mutation did not correlate with HBV DNA (P=0.609).In HBeAg(-) patients,the T1762/A1764 mutation alone was not correlated with HBV DNA (P=0.095),however,the presence of either the T1762/A1764 or A1896 mutations was associated with increased HBV DNA (P < 0.001).CONCLUSION:The percentage of HBeAg(-) patients is high in Indonesia,and most of the HBeAg(-) patients had been seroconverted.The A1896 mutation was most likely the major cause of HBeAg loss.The T1762/A1764 mutation alone was associated with lower viral loads in HBeAg(+) patients,but not in HBeAg(-) patients. | Andi Utama Marlinang Diarta Siburian Sigit Purwantomo Mariana Destila Bayu Intan Tri Shinta Kurniasih Susan Tai Rino Alvani Gani Laurentius Adrianus Lesmana All Sulaiman Wenny Astuti Achwan Soewignjo Soemohardjo Arnelis Nasrul Zubir Julius Syafruddin AR Lelosutan Benyamin Lukito Tantoro Harmono | 2011 | World Journal of Gastroenterology2011，17，6： | 3 |
| 3 | Hepatitis B virus pre-S2 start codon mutations in Indonesian liver disease patients显示文摘AIM: To identify the prevalence of pre-S2 start codon mutations and to assess their association with liver disease progression. METHODS: The mutations were identified by direct sequencing from 73 asymptomatic carriers, 66 chronic hepatitis (CH), 66 liver cirrhosis (LC) and 63 hepatocellular carcinoma (HCC) patients. Statistical significances were determined using Fisher's exact test, χ 2 test, and t -test analyses whenever appropriate. Pre-S mutation as a risk factor for advanced liver disease was estimated by unconditional logistic regression model adjusted with age, sex, and hepatitis B e antigen (HBeAg). P < 0.05 was considered significant. RESULTS: Mutation of the hepatitis B virus (HBV) pre-S2 start codon was found in 59 samples from 268 subjects (22.0%), with higher prevalence in patients with cirrhosis 27/66 (40.9%) followed by HCC 18/63 (28.6%), chronic hepatitis 12/66 (18.2%) and asymptomatic carriers 2/73 (2.7%) (P < 0.001). Logistic regression analysis showed that pre-S2 start codon mutation was an independent factor for progressive liver disease. Other mutations, at T130, Q132, and A138, were also associated with LC and HCC, although this was not statistically significant when adjusted for age, sex, and HBeAg. The prevalence of pre-S2 start codon mutation was higher in HBV/B than in HBV/C (23.0% vs 19.1%), whilst the prevalence of T130, Q132, and A138 mutation was higher in HBV/C than in HBV/B. The prevalence of pre-S2 start codon mutation was higher in LC (38.9%) and HCC (40.0%) than CH (5.6%) in HBeAg(+) group, but it was similar between CH, LC and HCC in HBeAg(-) group. CONCLUSION: Pre-S2 start codon mutation was higher in Indonesian patients compared to other Asian countries, and its prevalence was associated with advanced liver disease, particularly in HBeAg(+) patients. | Andi Utama Marlinang Diarta Siburian Ismail Fanany Mariana Destila Bayu Intan Rama Dhenni Tri Shinta Kurniasih Syafruddin AR Lelosutan Wenny Astuti Achwan Nasrul Zubir Arnelis Benyamin Lukito Irawan Yusuf Laurentius Adrianus Lesmana Ali Sulaiman | 2012 | World Journal of Gastroenterology2012，18，38： | 3 |
| 4 | The Strategic Effects of Multimarket Contact: Mutual Forbearance and Competitive Re- sponse in the Personal Computer Industry 显示文摘 | Kang W Bayus BL Balasubramanian S | 2010 | JOURNAL OF MARKETING RESEARCH2010，47，3： | 1 |
| 5 | Too Little,Too Early: Introduction Timing and New Product Performance in the Personal Digital Assistant Industry显示文摘 | BAYUS B L JAIN S RAO A G | 1997 | Journal of Marketing Research1997，34，2： | 1 |
| 6 | Forecasting sales of new contingent products:An application to the compact disc market显示文摘 | Bayus B L | | 0，，： | 1 |
| 7 | The financial rewards of new product introductions in the personal computer industry显示文摘 | BAYUS B L ERICKSON G JACOBSONR | 2003 | Management Science2003，49，2： | 1 |
| 8 | Crowdsourcing new product ideas over time: An analysis of the Dell IdeaStorm communi- ty显示文摘 | Bayus B L | 2013 | Management Science2013，59，1： | 1 |
| 9 | Product Prolifera- tion: An Empirical Analysis of Product Line Determi nants and Market Outcomes 显示文摘 | BAYUS B L PUTSIS Jr W P | 1999 | Marketing Science1999，18，2： | 1 |
| 10 | A new low-cost sensing system for rapid ring estimation of woody plants to support tree management显示文摘Continuous monitoring of the diameter and rings of woody plants is required to evaluate agroforestry products such as timber.Manual measurement is still widely used to monitor tree growth but it is time-consuming.In addition,advanced equipment and software are available but they require technical skills and are costly for smallholders.However,we have developed a rapid and low-cost sensing system for estimating the diameters of woody plants.The apparatus includes a sensor and Internet of things(IoT)technology,which can be used under any network conditions.The apparatus was tested with various trees and the results were compared with those obtained by manual measurement.The findings using the newly developed system demonstrate a strong correlation(R2=0.99)with the manually performed measurements.This rapid and low-cost diameter sensing system will be useful in the expansion of agroforestry sensing networks and beneficial to smallholders.Hence,the system will assist in informing foresters of potential problems in timely manner. | Bayu Taruna Widjaja Putra | 2020 | Information Processing in Agriculture2020，7，3： | 1 |
| 11 | New-product strategy and industry clockspeed 显示文摘 | SOUZA G C BAYUS B L WAGNER H M | 2004 | Management Science2004，50，4： | 1 |
| 12 | Crowdsourcing new product ideas over time: an analysis of the Dell IdeaStorm community显示文摘 | BAYUS B L | 2013 | Manage- ment Science2013，59，1： | 1 |
| 13 | Network effects and competition: an empirical analysis of the home video game industry 显示文摘 | SHANKAR V BAYUS B L | 2003 | Strategic Management Journal2003，24，4： | 1 |
| 14 | Interactions of a Zinc Dithiophosphate with Lithium 12-Hydroxystearate Grease显示文摘 | Matthew R Sivik James B Zeitz Denise Bayus | 2001 | Spokesman NLGI2001，66，3： | 1 |
| 15 | Associations of Retinal Oximetry in Healthy Young Aduhs显示文摘 | Ryan Eyn Kidd Man Muhammad Bayu Sasongko Ryo Kawasa- ki | 2014 | Invest Ophthalmol Vis Sci2014，55，： | 1 |
| 16 | An emoirical study of innate consumer innovativeness, personal charcateristics and new-product adoption behavior显示文摘 | IM S BAYUS B L MASON C H | 2003 | Journal of the Academy of Marketing Science2003，31，1： | 1 |
| 17 | An empirical analysis of consumer durable replacement intentions显示文摘 | Bayus B L Gupta S | 1992 | International Journal Research in Marketing1992，9，： | 1 |
| 18 | Forecasting sales of new contingentproduct : An application to the compact disc market显示文摘 | Bayus B L | 1987 | Journal of Produet Innovation Management1987，，24： | 1 |
| 19 | Crowdfunding Creative Ideas: The Dynamics of Project Backers In kickstarter 显示文摘 | Kuppuswamy V Bayus B L | 2013 | 2013，，： | 1 |
| 20 | Network effects and competition:An empirical analysis of the home video game industry显示文摘 | Shankar V Bayus B L | 2003 | Strategic Management Journal2003，24，4： | 1 |
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