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Sonyeam J, Chaipanya R, Suksomboon S, Khan MJ, Amatariyakul K, Wibowo A, Posoknistakul P, Charnnok B, Liu CG, Laosiripojana N, Sakdaronnarong C. Process design for acidic and alcohol based deep eutectic solvent pretreatment and high pressure homogenization of palm bunches for nanocellulose production. Sci Rep 2024; 14:7550. [PMID: 38555319 PMCID: PMC10981746 DOI: 10.1038/s41598-024-57631-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 03/20/2024] [Indexed: 04/02/2024] Open
Abstract
This research aimed to study on nanocellulose production from palm bunch using process design and cost analysis. Choline chloride based deep eutectic solvent pretreatment was selected for high-purity cellulose separation at mild condition, followed by nano-fibrillation using mechanical treatment. Three types of choline chloride-based deep eutectic solvents employing different hydrogen-bond donors (HBDs) namely lactic acid, 1,3-butanediol and oxalic acid were studied. The optimal cellulose extraction condition was choline chloride/lactic acid (ChLa80C) pretreatment of palm empty bunch at 80 °C followed by bleaching yielding 94.96%w/w cellulose content in product. Size reduction using ultrasonication and high-pressure homogenization produced nanocellulose at 67.12%w/w based on cellulose in raw material. Different morphologies of nanocellulose were tunable in the forms of nanocrystals, nano-rods and nanofibers by using dissimilar deep eutectic solvents. This work offered a sustainable and environmentally friendly process as well as provided analysis of DES pretreatment and overview operating cost for nanocellulose production. Application of nanocellulose for the fabrication of highly functional and biodegradable material for nanomedicine, electronic, optical, and micromechanical devices is achievable in the near future.
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Affiliation(s)
- Janejira Sonyeam
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom, 73170, Thailand
| | - Ratanaporn Chaipanya
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom, 73170, Thailand
| | - Sudarat Suksomboon
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom, 73170, Thailand
| | - Mohd Jahir Khan
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom, 73170, Thailand
| | - Krongkarn Amatariyakul
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom, 73170, Thailand
| | - Agung Wibowo
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom, 73170, Thailand
| | - Pattaraporn Posoknistakul
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom, 73170, Thailand
| | - Boonya Charnnok
- Department of Specialized Engineering, Energy Technology Program, Faculty of Engineering, Prince of Songkla University, 15 Karnjanavanich Rd., Hat Yai, Songkhla, 90110, Thailand
| | - Chen Guang Liu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Navadol Laosiripojana
- The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, 126 Pracha Uthit Road, Bang Mot, Thung Khru, Bangkok, 10140, Thailand
| | - Chularat Sakdaronnarong
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom, 73170, Thailand.
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Khan MJ, Wibowo A, Karim Z, Posoknistakul P, Matsagar BM, Wu KCW, Sakdaronnarong C. Wastewater Treatment Using Membrane Bioreactor Technologies: Removal of Phenolic Contaminants from Oil and Coal Refineries and Pharmaceutical Industries. Polymers (Basel) 2024; 16:443. [PMID: 38337332 DOI: 10.3390/polym16030443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/22/2024] [Accepted: 01/28/2024] [Indexed: 02/12/2024] Open
Abstract
Huge amounts of noxious chemicals from coal and petrochemical refineries and pharmaceutical industries are released into water bodies. These chemicals are highly toxic and cause adverse effects on both aquatic and terrestrial life. The removal of hazardous contaminants from industrial effluents is expensive and environmentally driven. The majority of the technologies applied nowadays for the removal of phenols and other contaminants are based on physio-chemical processes such as solvent extraction, chemical precipitation, and adsorption. The removal efficiency of toxic chemicals, especially phenols, is low with these technologies when the concentrations are very low. Furthermore, the major drawbacks of these technologies are the high operation costs and inadequate selectivity. To overcome these limitations, researchers are applying biological and membrane technologies together, which are gaining more attention because of their ease of use, high selectivity, and effectiveness. In the present review, the microbial degradation of phenolics in combination with intensified membrane bioreactors (MBRs) has been discussed. Important factors, including the origin and mode of phenols' biodegradation as well as the characteristics of the membrane bioreactors for the optimal removal of phenolic contaminants from industrial effluents are considered. The modifications of MBRs for the removal of phenols from various wastewater sources have also been addressed in this review article. The economic analysis on the cost and benefits of MBR technology compared with conventional wastewater treatments is discussed extensively.
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Affiliation(s)
- Mohd Jahir Khan
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Agung Wibowo
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Zoheb Karim
- MoRe Research Örnsköldsvik AB, SE-89122 Örnsköldsvik, Sweden
| | - Pattaraporn Posoknistakul
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Babasaheb M Matsagar
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Kevin C-W Wu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Chung-Li, Taoyuan 32003, Taiwan
| | - Chularat Sakdaronnarong
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
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Supajaruwong S, Porahong S, Wibowo A, Yu YS, Khan MJ, Pongchaikul P, Posoknistakul P, Laosiripojana N, Wu KCW, Sakdaronnarong C. Scaling-up of carbon dots hydrothermal synthesis from sugars in a continuous flow microreactor system for biomedical application as in vitro antimicrobial drug nanocarrier. Sci Technol Adv Mater 2023; 24:2260298. [PMID: 37859865 PMCID: PMC10583617 DOI: 10.1080/14686996.2023.2260298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 09/13/2023] [Indexed: 10/21/2023]
Abstract
Carbon dots (CDs) are a new class of nanomaterials exhibiting high biocompatibility, water solubility, functionality, and tunable fluorescence (FL) property. Due to the limitations of batch hydrothermal synthesis in terms of low CDs yield and long synthesis duration, this work aimed to increase its production capacity through a continuous flow reactor system. The influence of temperature and time was first studied in a batch reactor for glucose, xylose, sucrose and table sugar precursors. CDs synthesized from sucrose precursor exhibited the highest quantum yield (QY) (175.48%) and the average diameter less than 10 nm (~6.8 ± 1.1 nm) when synthesized at 220°C for 9 h. For a flow reactor system, the best condition for CDs production from sucrose was 1 mL min-1 flow rate at 280°C, and 0.2 MPa pressure yielding 53.03% QY and ~ 6.5 ± 0.6 nm average diameter (6.6 mg min-1 of CDs productivity). CDs were successfully used as ciprofloxacin (CP) nanocarrier for antimicrobial activity study. The cytotoxicity study showed that no effect of CDs on viability of L-929 fibroblast cells was detected until 1000 µg mL-1 CDs concentration. This finding demonstrates that CDs synthesized via a flow reactor system have a high zeta potential and suitable surface properties for nano-theranostic applications.
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Affiliation(s)
- Siriboon Supajaruwong
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, Thailand
| | - Sirawich Porahong
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, Thailand
| | - Agung Wibowo
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, Thailand
| | - Yu-Sheng Yu
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Mohd Jahir Khan
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, Thailand
| | - Pisut Pongchaikul
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakarn, Thailand
| | - Pattaraporn Posoknistakul
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, Thailand
| | - Navadol Laosiripojana
- The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, Bangkok, Thailand
| | - Kevin C.-W. Wu
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
- National Health Research Institutes, Institute of Biomedical Engineering and Nanomedicine, Miaoli, Taiwan
| | - Chularat Sakdaronnarong
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, Thailand
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Martha JW, Pranata R, Raffaello WM, Wibowo A, Akbar MR. The role of pentoxifylline in preventing contrast-induced nephropathy in coronary angiography/intervention - systematic review, meta-analysis, and meta-regression of randomized controlled trials. Eur Rev Med Pharmacol Sci 2022; 26:3310-3319. [PMID: 35587083 DOI: 10.26355/eurrev_202205_28750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE This systematic review and meta-analysis aimed to synthesize the latest evidence on pentoxifylline effect on the contrast-induced nephropathy (CIN) and whether the quality evidence is sufficient to make a definite conclusion MATERIALS AND METHODS: We performed a systematic literature search on topics that assesses pentoxifylline and CIN in coronary angiography/intervention up until 01 April 2021 using PubMed, Scopus, Embase, and hand-sampling. Primary outcome was CIN defined as ≥0.5 mg/dL or 25% rise in the SCr 48 h after procedure. RESULTS There were a total of 1142 subjects from 6 studies. There was no difference between pentoxifylline and control group in terms of serum creatinine at baseline (p=0.46) and after the procedure (p=0.33). The incidence of CIN was 51/571 (8.9%) in the pentoxifylline group and 61/571 (10.7%) in the control group. Pentoxifylline was not significantly associated with increase or decrease in the risk of CIN (RR 0.84 [0.59, 1.19], p=0.32; I2: 0%, p=0.89). Subgroup analysis for elective studies showed a non-significant result (RR 0.77 [0.47, 1.27], p=0.31; I2: 0%). Meta-regression analysis showed that the association between pentoxifylline and mortality was not affected by age (p=0.994), gender (reference: male, p=0.562), hypertension (p=0.336), diabetes (p=0.536), baseline serum creatinine (p=0.344), contrast used (p=0.431), and CIN incidence (p=0.521). GRADE Approach showed a low certainty of evidence for the effect estimate of pentoxifylline on CIN. CONCLUSIONS Our meta-analysis showed that pentoxifylline was not associated with the risk of CIN with low certainty of evidence. Hence, larger, multicentre, double-blind randomized controlled trials are required.
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Affiliation(s)
- J W Martha
- Department of Cardiology and Vascular Medicine, Faculty of Medicine Universitas Padjadjaran, Rumah Sakit Umum Pusat Hasan Sadikin, Bandung, Indonesia.
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Akbar MR, Pranata R, Wibowo A, Lim MA, Sihite TA, Martha JW. The association between serum prealbumin and poor outcome in COVID-19 - Systematic review and meta-analysis. Eur Rev Med Pharmacol Sci 2021; 25:3879-3885. [PMID: 34109596 DOI: 10.26355/eurrev_202105_25955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This systematic review and meta-analysis aimed to evaluate the association between the prealbumin and severity and mortality in COVID-19. MATERIALS AND METHODS We performed a systematic literature search from PubMed, Embase, and Scopus databases up until 2 February 2021. The primary outcome was the poor outcome, a composite of mortality and severity. Severe COVID-19 was defined as COVID-19 that fulfill the criteria for severe pneumonia or patients with acute respiratory distress syndrome/disease progression/need for intensive care unit or mechanical ventilation. The effect estimates were a mean difference between patients with and without a poor outcome in mg/dL and odds ratio (OR) per 1 mg/dL decrease in prealbumin level. The effect estimates were reported with their 95% confidence interval (95% CI). RESULTS Nine studies comprising of 2104 patients were included in this systematic review and meta-analysis. Patients with poor outcome have lower prealbumin level (mean difference -71.48 mg/dL [95% CI -93.74, -49.22], p<0.001; I2: 85.9%). Every 1 mg/dL decrease in prealbumin level was associated with 1% increase in poor outcome (OR 0.992 [0.987, 0.997], p=0.004, I2: 81.7%). Meta-regression analysis showed that the association between the prealbumin level and poor outcome varies with gender (male) (coefficient: 3.50, R2: 100%, p<0.001), but not age, diabetes, hypertension, and chronic kidney disease. CONCLUSIONS Low serum prealbumin was associated with poor outcomes in patients with COVID-19.
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Affiliation(s)
- M R Akbar
- Department of Cardiology and Vascular Medicine, Faculty of Medicine Universitas Padjadjaran, Rumah Sakit Umum Pusat Hasan Sadikin, Bandung, Indonesia.
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Abstract
An assessment of the success of a college is if the student's graduation rate is on time and high every year. The timeliness of students' graduation can be influenced by several factors. This study aims to determine the profile of the students who graduated both on time and not on time given a certain graduation predicate set by the institution and to know the factors influencing students’ gradution. The model used in this study using the NBC to determine the graduation pattern and the Decision tree to determine the influencing factors. In calculating the NBC algorithm using rapidminer, it was found that the profiles of students who graduated on time and late with the predicate of less satisfactory, satisfactory, very satisfactory and cumlaude. In the Desicion Tree calculation, the highest gain values are obtained in the IPK3, IPS1 and IPK2 attributes. This research needs to be developed further by increasing the number of attributes and data, and it is necessary to make a system to determine the accuracy of students’ graduation from the patterns that have been produced so that it can help universities to increase the level of students’ graduation every year.
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Syabaniah RN, Wibowo A, Marsusanti E. Penggunaan Alat Mewarnai Gambar Bagi Pemula Menggunakan Metode AHP dan Weight Product. ijcs 2020. [DOI: 10.33022/ijcs.v9i1.239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The process of selecting a drawing coloring tool in one of the Cianjur city painting studios takes a long time, because the child must first try each type of drawing coloring tool. based on this problem discussed about the selection of coloring tools for beginners by using the Analytic Hierarchy Process (AHP) and Product Weight (WP) methods. AHP test results obtained five criteria, namely comfort, convenience, safety, color quality and product quality of the ten recommended criteria based on observations and interviews. The five criteria are used as criteria for determining the selection of drawing tools for crayons, colored pencils, watercolors, markers, and oil pastels. the final result of the calculation of the Analytical Hierarchy Process (AHP) method shows that crayons are the most important alternative with a weight value of 0.20. while the test results of the Weighted Product (WP) method conclude that the brand code V4 is the crayon product brand chosen because the brand code V4 has the highest alternative value of the other ten products namely V4 = 0.118.
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Purnomo SH, Handayanta E, Hanifa A, Wibowo A, Purnaningrum M. The Influence of Innovation Characteristics to Farmers’ Decision in Accepting Integrated Crop-Livestock Technology in Karanganyar Region, Central Java. BuletinPeternak 2019. [DOI: 10.21059/buletinpeternak.v43i4.40765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Farmer’s decision in accepting integrated crop-livestock farming technology was affected by a some factors, including innovation characteristic. This research aimed to figure out the influence of innovation characteristic (relative advantage, compatibility, complexity, triability and observability) to farmer’s decision in adopting the innovation. The research was held in Ngargoyoso Subdistrict, Karanganyar Region, Central Java Province. Basic method used in this research was descriptive quantitative using purposive sampling technique to determine research location. Samples were determined using purposive sampling method with total number was 52 respondents. Data were analyzed using several analysis : data normality, validity, reliability, Oneway ANOVA, multiple linear regression and classic assumption. Oneway ANOVA test showed that farmers with different farming experience had different response in deciding to adopt the technology. Multiple linear regression test gave an equation Y = 2.379 + 0.369X1 + 0.213X2 + 0.080X3 + 0.777X4+ (-0.320X5) + e. The determination coefficient value (R2) is 0.647. The conclusion of this research was characteristic of innovation significantly influenced the farmers’ decision in accepting the integrated crop-livestock technology simultaneously, but partially only variable relative advantage and triability which significantly influenced to farmers’ decision in accepting the integrated crop-livestock technology innovation.
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Wibowo A, Veltman D, Delrue L, Vanhaverbeke M, Gillijns H, Caluwe E, Wu M, Pokreisz P, Derua R, Waelkens E, Bartunek J, Janssens S. 5987Neovascularization potential of exosomes derived from blood outgrowth endothelial cells in ischemic cardiomyopathy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.5987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A Wibowo
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
| | - D Veltman
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
| | - L Delrue
- Cardiovascular Center Aalst, Aalst, Belgium
| | | | - H Gillijns
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
| | - E Caluwe
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
| | - M Wu
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
| | - P Pokreisz
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
| | - R Derua
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
| | - E Waelkens
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
| | - J Bartunek
- Cardiovascular Center Aalst, Aalst, Belgium
| | - S Janssens
- KU Leuven, Cardiovascular Sciences, Leuven, Belgium
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Wibowo A, Jayarajan V, Vanhaverbeke M, Veltman D, Trenson S, Gillijns H, Wu M, Bartunek J, Janssens S. P2567Angiogenic and cytoprotective potential of exosomes derived from blood outgrowth endothelial cells in ischemic heart disease. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Veltman D, Wu M, Vanhaverbeke M, Wibowo A, Pokreisz P, Gillijns H, Van Soest S, Sinnaeve P, Janssens S. P5588Circulating markers of leukocyte activation correlate with myocardial inflammatory infiltration in a pig model of myocardial ischemia-reperfusion injury. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Taribuka J, Wibowo A, M Widyastuti S, Sumardiyono C. Potency of six isolates of biocontrol agents endophytic Trichoderma against fusarium wilt on banana. J Degrade Min Land Manage 2017. [DOI: 10.15243/jdmlm.2017.042.723] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Wibowo A, Giessen L. Actor Positions on Primary and Secondary International Forest-related Issues Relevant in Indonesia. ACTA ACUST UNITED AC 2015. [DOI: 10.5539/jsd.v8n3p10] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Wibowo A, Ahmat N. Chemotaxonomic significance of oligostilbenoids isolated from Dryobalanops in the taxonomic of Dipterocarpaceae. BIOCHEM SYST ECOL 2015. [DOI: 10.1016/j.bse.2014.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Widiyastuti T, Indraji M, Wibowo A, Hendroko R. Biorefinery of Jatropha Seed Cake by Lactid Acid Bacteria and the Effects on Hematological Profile of Rex Rabbit. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.egypro.2014.01.227] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wibowo A, Santosa A, Subandiyah S, Hermanto C, Taylor M. CONTROL OF FUSARIUM WILT OF BANANA BY USING TRICHODERMA HARZIANUM AND RESISTANT BANANA CULTIVARS. ACTA ACUST UNITED AC 2013. [DOI: 10.17660/actahortic.2013.975.18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Wibowo A, Ahmat N, Hamzah AS, Sufian AS, Ismail NH, Ahmad R, Jaafar FM, Takayama H. Malaysianol A, a new trimer resveratrol oligomer from the stem bark of Dryobalanops aromatica. Fitoterapia 2011; 82:676-81. [PMID: 21338657 DOI: 10.1016/j.fitote.2011.02.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 02/09/2011] [Accepted: 02/12/2011] [Indexed: 10/18/2022]
Abstract
A new resveratrol trimer, malaysianol A (1), five known resveratrol oligomers: laevifonol (2), ampelopsin E (3), α-viniferin (4), ε-viniferin (5), diptoindonesin A (6), and bergenin (7) have been isolated from the acetone extract of the stem bark of Dryobalanops aromatica by combination of vacuum and radial chromatography techniques. Their structures were established on the basis of their spectroscopic evidence and comparison with the published data. The cytotoxic activity of the compounds was tested against several cell lines in which compound 4 was found to inhibit strongly the growth of HL-60 cell line.
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Affiliation(s)
- A Wibowo
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor Darul Ehsan, Malaysia
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Wichmann H, Vogt R, Pontaka D, Wibowo A, Bahadir M. Congener specific analysis of polychlorinated terphenyls. Chemosphere 2010; 78:680-687. [PMID: 20045172 DOI: 10.1016/j.chemosphere.2009.12.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Revised: 11/30/2009] [Accepted: 12/07/2009] [Indexed: 05/28/2023]
Abstract
In order to identify and to quantify polychlorinated terphenyls (PCT) in environmental matrices, the chromatographic behavior of coplanar and non-coplanar congeners was evaluated. A mixture of 16 single PCT congeners was used for method development. Four of these compounds were synthesized for the first time by SUZUKI-coupling reaction. These were p-PCT (2,2'',6,6''-tetrachloro-, 2',3,3'',4,4'',5',-hexachloro-, 2',3,3'',5,5',5''-hexachloro-) and m-PCT (2,2'',3,3'',5,5''-hexachloro-). They were characterized by NMR ((1)H,(13)C) spectroscopy. By means of the new column chromatographic clean-up reported here, a good matrix removal and the separation of the coplanar PCT congeners from the non-coplanar ones was obtained. The recovery rates for all congeners were good for the PCT in different test matrices like fat, charcoal, and soil. The quality of the clean-up, the separation and the recovery rates were determined by GC/MS analysis. The method was applied for the first time to a real sample from a fire accident, where different PCT, obviously formed during the combustion process, were found. The conclusion is drawn that this method is suitable for the analysis of PCT in different environmental samples.
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Affiliation(s)
- H Wichmann
- Technische Universitaet Braunschweig, Institute of Ecological Chemistry and Waste Analysis, Hagenring 30, 38106 Braunschweig, Germany.
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Wibowo A, Syachrumsyach M, Suhartono E, Setiawan B. P181 Contribution of glucose level to oxidative stress in severe preeclampsia. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)61672-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mohanty AK, Wibowo A, Misra M, Drzal LT. Development of renewable resource-based cellulose acetate bioplastic: Effect of process engineering on the performance of cellulosic plastics. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10097] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Suryanto E, Bachrudin Z, Yusiati LM, Wibowo A, Widyobroto BP. Physical Characteristics and Chemical Composition of Meat from Sheep Fed with Fermented Straw. BuletinPeternak 2004. [DOI: 10.21059/buletinpeternak.v0i-.5116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Abstrak dalam bentuk hard copy
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Widjaja S, Cohen S, Brady WE, O'reilly K, Wibowo A, Graham RR, Porter KR. Evaluation of a rapid assay for detection of Chlamydia trachomatis infections in outpatient clinics in South Kalimantan, Indonesia. J Clin Microbiol 1999; 37:4183-5. [PMID: 10565960 PMCID: PMC85921 DOI: 10.1128/jcm.37.12.4183-4185.1999] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A multicenter cross-sectional survey was conducted comparing a commercially available chlamydial optical immunoassay (OIA) to the chlamydial ligase chain reaction (LCR). Endocervical samples from 415 outpatients visiting clinics from three hospitals in South Kalimantan, Indonesia, were evaluated. Relative to the LCR, the overall sensitivity and specificity of the OIA were 31.6 and 98.9%, respectively. The sensitivity of the OIA varied among the three hospital laboratories, ranging from 20 to 50%. The OIA performance was slightly lower on samples from patients attending dermatovenereology clinics than on samples from nondermatovenereology clinic patients. The results indicate that the OIA did not perform well compared to LCR.
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Affiliation(s)
- S Widjaja
- Viral Diseases Program, U.S. Naval Medical Research Unit No. 2, Kalimantan, Indonesia
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Wibowo A. Ageing in the South-East Asian region. Health Millions 1999; 25:8-9. [PMID: 12349422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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27
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Thelmo WL, Vetrano JA, Wibowo A, DiMaio TM, Cruz-Vetrano WP, Kim DS. Angiodysplasia of colon revisited: pathologic demonstration without the use of intravascular injection technique. Hum Pathol 1992; 23:37-40. [PMID: 1544666 DOI: 10.1016/0046-8177(92)90008-q] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The recognition of angiodysplasia either at the time of surgery or at the time of routine gross and microscopic examination has often been difficult. Until now the primary methodology used in defining the lesion has been the intravascular injection of radiopaque dyes and other compounds. This technique, however, is prohibitively time consuming and expensive, and does not encourage routine use in surgical pathology practice. We report two cases of angiodysplasia, both occurring in unlikely areas, in which the pathologic lesion was demonstrated without the use of an intravascular injection technique. One case involved 35 cm of proximal transverse colon and the other involved 23 cm of colon distal to the ileocecal valve. A simple method of demonstrating angiodysplasia by intraluminal formalin fixation (37% concentrated, unbuffered), with tying of both resected ends for 3 hours, followed by dissection of the mucosa from the muscle wall, is described. Areas of ectatic, pericryptal, thin-walled blood vessels with adjacent dilated, engorged submucosal veins are readily seen on gross direct inspection highlighted by transillumination. Histologic sections taken from these areas show early lesions of angiodysplasia characterized by ectatic, engorged submucosal veins and some dilated venules and capillaries in the mucosal lamina propria.
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Affiliation(s)
- W L Thelmo
- Department of Surgical Pathology, Kings County Hospital Center, SUNY Health Science Center, Brooklyn 11203
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Keshavarzian A, Wibowo A, Gordon JH, Fields JZ. MPTP-induced duodenal ulcers in rat. Prevention by reuptake blockers for serotonin and norepinephrine, but not dopamine. Gastroenterology 1990; 98:554-60. [PMID: 2298362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Abnormal activity of dopamine, serotonin, and norepinephrine may contribute to the pathophysiology of duodenal ulcers. We therefore studied the effects of neuropharmacological manipulations on 1-methly-4-phenyl-1,2,5,6-tetrahydropyridine (MPTP)-induced duodenal ulcers. Duodenal ulcers were produced in rats by 12 subcutaneous injections of a neurotoxin, MPTP, over 4 days. At an MPTP dose of 20 mg.kg. injection, duodenal ulcers developed in 91% (43 of 47) of animals with low mortality. When neuropharmacological agents were preadministered before MPTP, the following effects on duodenal ulcers incidence were obtained. MAO-B inhibitors (pargyline [55%], deprenyl [43%]) but not MAO-A inhibitors (clorgyline [91%]) significantly decreased the frequency of duodenal ulcers suggesting that, like MPTP-induced parkinsonism, formation of a toxic metabolite, probably 1-methyl-4-phenyl-pyridinium is involved. Reuptake blockers for serotonin (fluoxetine [18%], indalpine [25%]) also decreased the frequency of duodenal ulcers. Reuptake blockers for norepinephrine (desmethylimipramine [17%], tomoxepine [31%], but not amfonelic acid [82%]) decreased the frequency of duodenal ulcers. Reuptake blockers for dopamine (benztropine [73%], amfonelic acid [82%], GBR-12909 [80%]) did not protect against duodenal ulcers. However, GBR-12909 significantly decreased the severity of those duodenal ulcers that were produced. These data suggest that abnormally low levels of synaptic transmission in serotonergic and possibly noradrenergic neurons play an important role in the pathogenesis of duodenal ulcer while the role of dopamine may be limited to modulation of ulcer severity.
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Affiliation(s)
- A Keshavarzian
- Department of Medicine, Loyola University Medical Center, Maywood, Illinois
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29
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Verschoor M, Herber R, Zielhuis R, Wibowo A. Zinc protoporphyrin as an indicator of lead exposure: precision of zinc protoporphyrin measurements. Int Arch Occup Environ Health 1987; 59:613-21. [PMID: 3679557 DOI: 10.1007/bf00377923] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In lead-exposed workers many factors affect the relationship between the levels of lead and of zinc protoporphyrin (ZPP) in blood. When the zinc protoporphyrin level is used to assess the lead in the blood level, the analytical accuracy of the ZPP and the PbB determinations should be known. Also the variability of lead exposure over time is an important parameter of this assessment. The absolute and relative precision of ZPP measurements with two brands of ZPP meters (AVIV and ESA) were compared. The absolute precision of the ZPP measurements is not constant for the AVIV meter, but is constant for the ESA meter. The relative precision for both brands of meters decreases with increasing ZPP levels. Between the AVIV and the ESA meters, a significant difference in response, irrespective of the kind of anticoagulant used, was observed. The regression equations between PbB and ZPP levels were studied. Different factors can affect the relationship between PbB and ZPP, e.g. variability in lead exposure, the time-lag between the increase of PbB and ZPP, and the precision and accuracy of PbB and ZPP measurements.
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Affiliation(s)
- M Verschoor
- Coronel Laboratory for Occupational and Environmental Health, Medical Faculty, University of Amsterdam, The Netherlands
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Verschoor M, Herber R, van Hemmen J, Wibowo A, Zielhuis R. Renal function of workers with low-level cadmium exposure. Scand J Work Environ Health 1987; 13:232-8. [PMID: 3497448 DOI: 10.5271/sjweh.2065] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The influence of occupational exposure to cadmium on renal function was examined in 27 male cadmium workers from plants with second-degree usage of cadmium. The levels of cadmium in the blood and urine and various protein concentrations in the urine and serum were determined. The urinary levels of beta 2-microglobulin, retinol-binding protein, and N-acetyl-beta-D-glucosaminidase were statistically significantly increased in workers with urinary cadmium levels above 50 nmol/l. SDS-PAGE electrophoresis with silver staining is probably a sensitive indicator of the early effects of cadmium on protein excretion. The currently recommended biological exposure limits may have to be lowered.
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Abstract
The influence of lead exposure on renal function was examined. In 155 lead workers and 126 control workers, lead in blood (PbB) and zinc protoporphyrin in blood (ZPP) were measured as indicators of exposure to lead; various proteins in urine were measured as parameters of renal functions. Regression and matched-pair analyses suggest that tubular parameters may be more influenced by lead exposure than glomerular parameters. Changes in renal function parameters may already occur at PbB levels below 3 mumol/liter (600 micrograms/liter). The excretion of N-acetyl-beta-D-glucosaminidase appears to be the most consistent and sensitive parameter of an early effect on the tubular function.
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Affiliation(s)
- M Verschoor
- Coronel Laboratory, University of Amsterdam, The Netherlands
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