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Advanced solar air collectors are widely implemented in research for drying purposes. This research study presents a new steady state energy balance and exergy equations for a novel double pass solar air collector with fins and phase change material (PCM) according to first and second law of thermodynamics. The mathematical equations of energy balance were solved using the matrix inversion method. The predictions were observed at mass flow rates ranging from 0.01 kg/sec to 0.15 kg/sec, and solar radiation ranging between 425 W/m2 and 1000 W/m2. The impacts of solar radiation levels and mass air rates on energy efficiency, exergy efficiency and the improvement potential have been estimated and evaluated. The optimum energy efficiency of proposed collector is 73% at mass air rate of 0.15 kg/sec. The exergy efficiency is nearly 2.5–4.2% at maximum solar radiation level of 1000 W/m2 as well as the lowest and highest improvement potential are 980–2287 W for a solar radiation of 425–1000 W/m2.
J. Assadeg; Ali H.A. Al-Waeli; A. Fudholi; K. Sopian. Energetic and exergetic analysis of a new double pass solar air collector with fins and phase change material. Solar Energy 2021, 226, 260 -271.
AMA StyleJ. Assadeg, Ali H.A. Al-Waeli, A. Fudholi, K. Sopian. Energetic and exergetic analysis of a new double pass solar air collector with fins and phase change material. Solar Energy. 2021; 226 ():260-271.
Chicago/Turabian StyleJ. Assadeg; Ali H.A. Al-Waeli; A. Fudholi; K. Sopian. 2021. "Energetic and exergetic analysis of a new double pass solar air collector with fins and phase change material." Solar Energy 226, no. : 260-271.
Salinity stress is one of the environmental factors that limit crop production. The objective was to find out the effect of salinity stress on the growth and yield of mungbean (Vigna radiata (L.) R. Wilczek) treated with mangosteen pericarp extract. A randomised block design arranged in factorial pattern with two factors and three replications was used in the experiment. Salinity stress consisted of three levels, namely, 0%, 0.5% and 1%, and mangosteen pericarp extract consisted of two levels, namely, 0% and 1%. Plant height, leaf area, yield components and pod yield were analysed by univariate variance and Duncan’s multiple range test at 5% significance level. The results showed that the increase in salinity stress reduced the leaf area, plant height, yield components and yield of mungbean. However, the use of mangosteen pericarp extract could increase the plant height, leaf area, yield components and yield of mungbean. The weight reduction of 100 mungbean seeds at 1% salinity stress could be alleviated by the application of 1% mangosteen pericarp extract. Moreover, mangosteen pericarp extract could mitigate mungbean yield loss caused by salinity stress.
Maman Suryaman; Yaya Sunarya; Iis Istarimila; Ahmad Fudholi. Effect of salinity stress on the growth and yield of mungbean (Vigna radiata (L.) R. Wilczek) treated with mangosteen pericarp extract. Biocatalysis and Agricultural Biotechnology 2021, 102132 .
AMA StyleMaman Suryaman, Yaya Sunarya, Iis Istarimila, Ahmad Fudholi. Effect of salinity stress on the growth and yield of mungbean (Vigna radiata (L.) R. Wilczek) treated with mangosteen pericarp extract. Biocatalysis and Agricultural Biotechnology. 2021; ():102132.
Chicago/Turabian StyleMaman Suryaman; Yaya Sunarya; Iis Istarimila; Ahmad Fudholi. 2021. "Effect of salinity stress on the growth and yield of mungbean (Vigna radiata (L.) R. Wilczek) treated with mangosteen pericarp extract." Biocatalysis and Agricultural Biotechnology , no. : 102132.
Gene expression of SAP 4–6 based on the detection of mRNA was observed in Candida albicans isolates from HIV-positive patients with oral candidiasis and commensal from healthy individuals. The species of C. albicans strains were selectively isolated from both sources using CHROMagar Chromogenic Media. The obtained isolates were then induced to express SAP 4–6 using SAP 4–6 gene inducer media. Analysis of gene expression was performed on a molecular basis using the RT-PCR method. Molecular analysis of gene expression showed that the isolates CH3 from HIV-positive patients with oral candidiasis could express SAP 4–6 gene, while commensal isolates from healthy people could not. Based on the results of this study, it could be concluded that, in terms of molecular detection, only isolates from HIV-positive patients (CH3) could express their SAP 4–6 gene.
Vita Meylani; Langkah Sembiring; Ahmad Fudholi; Tri Wibawa. Differentiated sap (4–6) gene expression of Candida albicans isolates from HIV-positive patients with oral candidiasis and commensals in healthy individuals. Microbial Pathogenesis 2021, 105075 .
AMA StyleVita Meylani, Langkah Sembiring, Ahmad Fudholi, Tri Wibawa. Differentiated sap (4–6) gene expression of Candida albicans isolates from HIV-positive patients with oral candidiasis and commensals in healthy individuals. Microbial Pathogenesis. 2021; ():105075.
Chicago/Turabian StyleVita Meylani; Langkah Sembiring; Ahmad Fudholi; Tri Wibawa. 2021. "Differentiated sap (4–6) gene expression of Candida albicans isolates from HIV-positive patients with oral candidiasis and commensals in healthy individuals." Microbial Pathogenesis , no. : 105075.
Availability of fossil fuels is increasingly limited, so the search for alternative fuels is important. In accordance with the current scenario, bioenergy research emphasizes the bioethanol production from plants that are abundant and available throughout the year, such as palm sap. The palm sap is a type of palm tree that grows in tropical forests, particularly in South Asia and Southeast Asia. More than 3,000 species of palm exist, and they are categorised as multipurpose trees because they can be used as raw materials for various products, such as sugar, fermented drinks, syrup, palm wine, vinegar, alcohol and bioethanol. This study was aimed to examine bioethanol production from palm sap through optimization of Saccharomyces cerevisiae as an inoculum. The research sample was obtained from local farmers in Pusuk, Lombok Island, West Nusa Tenggara, and Indonesia. The research parameters included the pH change, colour, and ethanol content. The results showed that the pH change of the palm sap during storage was caused by the growth of microorganisms to produce organic acids by releasing hydrogen ions. As pH decreased, L* and b* values also decreased significantly, but not significantly change in a* values was observed. Glucose changed to ethanol during fermentation. The higher the percentage of inoculum used, the higher the volume of ethanol obtained. The bioethanol content of palm sap prior to fermentation was 32.3%, and it increased to 75.6% after 24 hours of incubation.
Ansar; Nazaruddin; Atri Dewi Azis; Ahmad Fudholi. Enhancement of bioethanol production from palm sap (Arenga pinnata (Wurmb) Merr) through optimization of Saccharomyces cerevisiae as an inoculum. Journal of Materials Research and Technology 2021, 1 .
AMA StyleAnsar, Nazaruddin, Atri Dewi Azis, Ahmad Fudholi. Enhancement of bioethanol production from palm sap (Arenga pinnata (Wurmb) Merr) through optimization of Saccharomyces cerevisiae as an inoculum. Journal of Materials Research and Technology. 2021; ():1.
Chicago/Turabian StyleAnsar; Nazaruddin; Atri Dewi Azis; Ahmad Fudholi. 2021. "Enhancement of bioethanol production from palm sap (Arenga pinnata (Wurmb) Merr) through optimization of Saccharomyces cerevisiae as an inoculum." Journal of Materials Research and Technology , no. : 1.
In this study, a greenhouse solar dryer with double-pass multi-hollow collector for leaf drying was design, constructed, and evaluated. From the result, the double pass solar air collector with multi-hollow tube is capable of increasing air temperature by 5.5℃-10.8℃ compared to ambient air temperature. Thermal efficiency of the dryer was evaluated for passive and active modes, where 47.2% and 50% are recorded respectively. The moisture reduction on mass basis in passive and active dryer recorded was 44% and 74%, respectively. The specific moisture extraction rate (SMER) and specific energy consumption (SEC) of passive dryer was determined to be 0.198 kg per kWh and 5.047 kWh per kg, and active dryer at 0.210 kg per kWh and 4.769 kWh per kg, respectively.
Wan Nurlaila Mat Desa; Ahmad Fudholi; Henny Sudibyo; Ghalya Pikra; Nugrahaning Sani Dewi; Nilofar Asim; Dalmasius Ganjar Subagio; Tinton Dwi Atmaja; Edy Riyanto; Kadek Heri Sanjaya; Muhammad Kristiawan; Haznan Abimanyu. Energy Analysis of Greenhouse Dryer for Ficus Carica L. Leaves. International Journal of Heat and Technology 2021, 39, 810 -816.
AMA StyleWan Nurlaila Mat Desa, Ahmad Fudholi, Henny Sudibyo, Ghalya Pikra, Nugrahaning Sani Dewi, Nilofar Asim, Dalmasius Ganjar Subagio, Tinton Dwi Atmaja, Edy Riyanto, Kadek Heri Sanjaya, Muhammad Kristiawan, Haznan Abimanyu. Energy Analysis of Greenhouse Dryer for Ficus Carica L. Leaves. International Journal of Heat and Technology. 2021; 39 (3):810-816.
Chicago/Turabian StyleWan Nurlaila Mat Desa; Ahmad Fudholi; Henny Sudibyo; Ghalya Pikra; Nugrahaning Sani Dewi; Nilofar Asim; Dalmasius Ganjar Subagio; Tinton Dwi Atmaja; Edy Riyanto; Kadek Heri Sanjaya; Muhammad Kristiawan; Haznan Abimanyu. 2021. "Energy Analysis of Greenhouse Dryer for Ficus Carica L. Leaves." International Journal of Heat and Technology 39, no. 3: 810-816.
Understanding the basic properties of natural fibers is important to determine the optimal intended uses for instance as high-quality bio-composite raw material. This review describes the characteristics, and potential uses of some natural fibers in order to improve their sustainability and economic values. The natural fibers have low density and high strength to weight ratio and reduction make them potential as light weight composite and reinforcement materials. The microstructure and chemical compositions of fibers affect the mechanical properties with the fiber cross-sectional area is the most variable influencing the fiber strength. Natural fibers are easy to absorb water due to the presence of hemicellulose that give hydrophilic properties make them less compatible in the interaction with matrix with hydrophobicity properties. Higher cellulose content and crystallinity tend to result better strength properties of fiber while lignin is since versa. Besides that, fiber anatomical characteristics vary between different and same species that affect on the density and mechanical properties. The other factors namely environmental conditions, method of transportation, storage time and conditions, and fiber extraction affect the size and quality of the natural fibers.
Azizatul Karimah; Muhammad Rasyidur Ridho; Sasa Sofyan Munawar; Danang Sudarwoko Adi; Ismadi; Ratih Damayanti; Bambang Subiyanto; Widya Fatriasari; Ahmad Fudholi. A review on natural fibers for development of eco-friendly bio-composite: characteristics, and utilizations. Journal of Materials Research and Technology 2021, 13, 2442 -2458.
AMA StyleAzizatul Karimah, Muhammad Rasyidur Ridho, Sasa Sofyan Munawar, Danang Sudarwoko Adi, Ismadi, Ratih Damayanti, Bambang Subiyanto, Widya Fatriasari, Ahmad Fudholi. A review on natural fibers for development of eco-friendly bio-composite: characteristics, and utilizations. Journal of Materials Research and Technology. 2021; 13 ():2442-2458.
Chicago/Turabian StyleAzizatul Karimah; Muhammad Rasyidur Ridho; Sasa Sofyan Munawar; Danang Sudarwoko Adi; Ismadi; Ratih Damayanti; Bambang Subiyanto; Widya Fatriasari; Ahmad Fudholi. 2021. "A review on natural fibers for development of eco-friendly bio-composite: characteristics, and utilizations." Journal of Materials Research and Technology 13, no. : 2442-2458.
Solar energy has long been utilised in crop conservation. The use of solar dryers as a drying method overcomes the drawbacks of the traditional approach to drying crops under the sun. Previous studies were coherently described and focused on the development and thermal convection of greenhouse dryers, structural analysis, crops cultivation for offering choices to reader about solar greenhouse dryers in agriculture. Based on the previous related studies, the current work proposes an evolve and detail review of solar-assisted greenhouse dryers, namely, passive dryers, active dryers and hybrid dryers, from the aspects of system performance, collector performance and the drying characteristics of various crops. Drying crops in a solar greenhouse dryer protects crops from insects, rain and dust. Thus, these dryers are preferred in natural and conventional drying. This review provides a satisfactory guide for researchers to compare, develop and improve solar greenhouse drying systems to achieve optimum crop drying rates based on thermal convection mode.
Nurul Aiman Mhd Safri; Zalita Zainuddin; Mohd Syahriman Mohd Azmi; Idris Zulkifle; Ahmad Fudholi; Mohd Hafidz Ruslan; Kamaruzzaman Sopian. Current status of solar-assisted greenhouse drying systems for drying industry (food materials and agricultural crops). Trends in Food Science & Technology 2021, 114, 633 -657.
AMA StyleNurul Aiman Mhd Safri, Zalita Zainuddin, Mohd Syahriman Mohd Azmi, Idris Zulkifle, Ahmad Fudholi, Mohd Hafidz Ruslan, Kamaruzzaman Sopian. Current status of solar-assisted greenhouse drying systems for drying industry (food materials and agricultural crops). Trends in Food Science & Technology. 2021; 114 ():633-657.
Chicago/Turabian StyleNurul Aiman Mhd Safri; Zalita Zainuddin; Mohd Syahriman Mohd Azmi; Idris Zulkifle; Ahmad Fudholi; Mohd Hafidz Ruslan; Kamaruzzaman Sopian. 2021. "Current status of solar-assisted greenhouse drying systems for drying industry (food materials and agricultural crops)." Trends in Food Science & Technology 114, no. : 633-657.
In this study, yeast microbial fuel cells (MFCs) were established as biosensors for in-situ monitoring of dissolved oxygen (DO) levels in environmental waters, with yeast and glucose substrates acting as biocatalyst and fuel, respectively. Diverse environmental factors, such as temperature, pH and conductivity, were considered. The sensor performance was first tested with distilled water with different DO levels ranging from 0 mg/L to 8 mg/L and an external resistance of 1000 Ω. The relationship between DO and current density was non-linear (exponential). This MFC capability was further explored under different environmental conditions (pH, temperature and conductivity), and the current density produced was within the range of 0.14–34.88 mA/m2, which increased with elevated DO concentration. The resulting regression was y = 1.3051e0.3548x, with a regression coefficient (R2) = 0.71, indicating that the MFC-based DO meter was susceptible to interference. When used in environmental water samples, DO measurements using MFC resulted in errors ranging from 6.25 % to 15.15 % when compared with commercial DO meters. The simple yeast-based MFC sensors demonstrate promising prospects for future monitoring in a variety of areas, including developing countries and remote locations.
Marcelinus Christwardana; Linda Aliffia Yoshi; Indraprasta Setyonadi; Mohammad Rizqi Maulana; Ahmad Fudholi. A novel application of simple submersible yeast-based microbial fuel cells as dissolved oxygen sensors in environmental waters. Enzyme and Microbial Technology 2021, 149, 109831 .
AMA StyleMarcelinus Christwardana, Linda Aliffia Yoshi, Indraprasta Setyonadi, Mohammad Rizqi Maulana, Ahmad Fudholi. A novel application of simple submersible yeast-based microbial fuel cells as dissolved oxygen sensors in environmental waters. Enzyme and Microbial Technology. 2021; 149 ():109831.
Chicago/Turabian StyleMarcelinus Christwardana; Linda Aliffia Yoshi; Indraprasta Setyonadi; Mohammad Rizqi Maulana; Ahmad Fudholi. 2021. "A novel application of simple submersible yeast-based microbial fuel cells as dissolved oxygen sensors in environmental waters." Enzyme and Microbial Technology 149, no. : 109831.
Purple yam flour was successfully modified by heat moisture treatment (HMT) in three cycles using an oven (OHMT) and autoclave (AHMT) (100°C and 120°C; moisture level: 15%, 22%, and 30%). X-ray diffraction (XRD) and FTIR were used to characterize the molecular structural change due to thermal treatment. The native and modified purple yam flours’ swelling capacity, solubility, and digestibility (RDS, SDS, and RS) parameters were studied. The OHMT and AHMT treatments decreased swelling capacity, solubility, and RDS, while RS and SDS increased compared to native. FT-IR analysis showed an absorption band decrease at 930, 1022, 1080, 1155-1150, 1641, 2930, and 3400 cm-1 for the modified flours. After HMT, the Diffractogram pattern showed starch type change from B to A with four core peaks at 2θ: 15˚; 17˚; 18˚ and 23˚. OHMT and AHMT increased the relative crystallinity of all samples except OHMT215 (oven temperature: 120˚C and moisture level: 15%) to 30.80%. This study indicated that the two treatments improved purple yam’s functional properties, therefore it is potentially applied in many food industries.
Asranudin; Holilah; Andi Noor Kholidha Syarifin; Adi Setyo Purnomo; Ansharullah; Ahmad Fudholi. The effect of heat moisture treatment on crystallinity and physicochemical-digestibility properties of purple yam flour. Food Hydrocolloids 2021, 120, 106889 .
AMA StyleAsranudin, Holilah, Andi Noor Kholidha Syarifin, Adi Setyo Purnomo, Ansharullah, Ahmad Fudholi. The effect of heat moisture treatment on crystallinity and physicochemical-digestibility properties of purple yam flour. Food Hydrocolloids. 2021; 120 ():106889.
Chicago/Turabian StyleAsranudin; Holilah; Andi Noor Kholidha Syarifin; Adi Setyo Purnomo; Ansharullah; Ahmad Fudholi. 2021. "The effect of heat moisture treatment on crystallinity and physicochemical-digestibility properties of purple yam flour." Food Hydrocolloids 120, no. : 106889.
The development of the best properties of corn husk fibre (CHF) as a reinforcing material from coconut shell powder–polyester composite is an extremely interesting subject. This research focuses on characterising the mechanical properties and morphology of polyester/coconut shell powder composites filled with CHF. The variations of coconut shell powder (CSP) contents are 5% and 10%, and the corn husk fibre contents are 10%, 15%, 20% and 30% (vol%). The mixture is blended and poured into a composite mould using the hot press technique. The tensile and flexural strengths of the mixture were investigated, and the fracture surface of the composite was also analysed by scanning electron microscopy (SEM). The tensile strength of polyester/5 vol % CSP decreased dramatically from 22.459 MPa to 16.955 MPa. However, flexural strength increased from 24.233 MPa to 45.844 MPa when the corn husk fibre (CHF) content increased. Further, all polyester–10% of CSP composites have higher flexural strength values than the polyester–5% of CSP counterparts. Conversely, the tensile strength properties decrease at 10%–15% CHF content and then increase at 20%–30% CHF contents. This outcome is due to the tighter and stronger interfacial bonding between CHF–CSP–polyester and the decreasing number of fibres–pull-outs. Fractured morphology with SEM shows poor interfacial bonding between CHF–CSP–polyester and fibre pullout on composites.
Nasmi Herlina Sari; Suteja Suteja; Ahmad Fudholi; Ahmad Zamzuriadi; Emmy Dyah Sulistyowati; Pandri Pandiatmi; Sinarep Sinarep; Ahmad Zainuri. Morphology and mechanical properties of coconut shell powder-filled untreated cornhusk fibre-unsaturated polyester composites. Polymer 2021, 222, 123657 .
AMA StyleNasmi Herlina Sari, Suteja Suteja, Ahmad Fudholi, Ahmad Zamzuriadi, Emmy Dyah Sulistyowati, Pandri Pandiatmi, Sinarep Sinarep, Ahmad Zainuri. Morphology and mechanical properties of coconut shell powder-filled untreated cornhusk fibre-unsaturated polyester composites. Polymer. 2021; 222 ():123657.
Chicago/Turabian StyleNasmi Herlina Sari; Suteja Suteja; Ahmad Fudholi; Ahmad Zamzuriadi; Emmy Dyah Sulistyowati; Pandri Pandiatmi; Sinarep Sinarep; Ahmad Zainuri. 2021. "Morphology and mechanical properties of coconut shell powder-filled untreated cornhusk fibre-unsaturated polyester composites." Polymer 222, no. : 123657.
Polyvinylpyrrolidone (PVP)/cellulose acetate (CA) composite nanofibres loaded with Chromolaena odorata (L) King extract were prepared using the electrospinning method. The physicochemical properties of nanofibre composites, including their morphology, size, crystallinity, chemical interactions and compressive strength, were studied. In vitro tests including antioxidant, antibacterial and release activities were also investigated. The morphology of the nanofibre composites containing C. odorata extract (COE) had a smooth, homogeneous and flexible surface and fibres with a diameter of 1454 nm. Fourier-transform infrared spectroscopy analysis showed the interaction of PVP, CA and COE molecules through hydrogen bonds. The XRD pattern showed that crystals were transformed into the amorphous state when COE was converted into nanocomposite fibres. The Young's modulus values of the resulting nanofibre composites were in the range of 199–209 MPa. The antioxidant activity of PVP/CA nanocomposite fibres contained higher COE than did pure COE, whereas the antibacterial activity of PVP/CA/COE nanofibre was as strong as that of pure COE. The release rate of COE in nanofibres increases faster than does pure COE.
Ida Sriyanti; Leni Marlina; Ahmad Fudholi; Sherin Marsela; Jaidan Jauhari. Physicochemical properties and In vitro evaluation studies of polyvinylpyrrolidone/cellulose acetate composite nanofibres loaded with Chromolaena odorata (L) King extract. Journal of Materials Research and Technology 2021, 12, 333 -342.
AMA StyleIda Sriyanti, Leni Marlina, Ahmad Fudholi, Sherin Marsela, Jaidan Jauhari. Physicochemical properties and In vitro evaluation studies of polyvinylpyrrolidone/cellulose acetate composite nanofibres loaded with Chromolaena odorata (L) King extract. Journal of Materials Research and Technology. 2021; 12 ():333-342.
Chicago/Turabian StyleIda Sriyanti; Leni Marlina; Ahmad Fudholi; Sherin Marsela; Jaidan Jauhari. 2021. "Physicochemical properties and In vitro evaluation studies of polyvinylpyrrolidone/cellulose acetate composite nanofibres loaded with Chromolaena odorata (L) King extract." Journal of Materials Research and Technology 12, no. : 333-342.
The present paper examines the hypothetical and empirical effects of geometrical parameters via transverse ribs on the back of a jet-impingement solar air heater absorber plate. MATLAB software environment was utilised to develop and solve equations on the steady-state energy balance. Moreover, verification of the performance was done through indoor experiments by employing a solar simulator. The range of parameters included rate of mass flow (ṁ), from 0.007 to 0.039 (kg/s), height of the rib (e) from 0.0017 to 0.0032 (m), relative pitch (P) from 0.01 to 0.04 (m), aspect ratio of the duct was 12, and solar irradiance (I) from 500 to 1000 (W/m2). Finally, the outcomes were compared to smooth ducting hose based on the same condition of flows to examine the improvement of solar air heater thermal efficiency. Therefore, the optimum thermal efficiency was found to be 78% at a (i) mass flowrate of 0.039 (kg/s), (ii) ambient temperature of 297(K), and (iii) a solar irradiance of 1000 (W/m2).
Refat Moshery; Tan Yong Chai; Kamaruzzaman Sopian; Ahmad Fudholi; Ali H.A. Al-Waeli. Thermal performance of jet-impingement solar air heater with transverse ribs absorber plate. Solar Energy 2020, 214, 355 -366.
AMA StyleRefat Moshery, Tan Yong Chai, Kamaruzzaman Sopian, Ahmad Fudholi, Ali H.A. Al-Waeli. Thermal performance of jet-impingement solar air heater with transverse ribs absorber plate. Solar Energy. 2020; 214 ():355-366.
Chicago/Turabian StyleRefat Moshery; Tan Yong Chai; Kamaruzzaman Sopian; Ahmad Fudholi; Ali H.A. Al-Waeli. 2020. "Thermal performance of jet-impingement solar air heater with transverse ribs absorber plate." Solar Energy 214, no. : 355-366.
Rice is a crop that is consumed as a staple food by the majority of the people in the world and therefore failure in rice crops, due to any reason, poses a severe threat of starvation. Rice blast, caused by a fungus Pyricularia oryzae, has been ranked among the most threatening plant diseases of rice and it is found wherever rice is grown. All of the rice blast disease management strategies employed so far have had limited success and rice blast has never been eliminated from rice fields. Hence, there is a need to look for the best remedy in terms of effectiveness, sustainability, and organic nature of the method. This study was aimed at determining the plant growth-promoting and fungicidal effects of a mixture of Piper caninum and Piper betle var. Nigra leaves extracts and rhizobacteria. Gas chromatography–mass spectrophotometry (GC-MS) analysis of a mixture of leaves extracts of these plants revealed the presence of new bioactive compounds such as alpha.-gurjunene, gamma.-terpinene, and ethyl 5-formyl 3-(2-ethoxycarbonyl) in a mixture of leaves extracts of P. caninum and P. betle var. Nigra. The mixture of these extracts reduced the intensity of blast disease, inhibited P. oryzae, and improved the growth, yield, and quality of Bali rice. All treatments comprising of different concentrations of a mixture of leaves extracts of P. caninum and P. betle var. Nigra plus rhizobacteria exhibited biocontrol and bioefficacy. However, a 2% concentration of a mixture of these leaves extracts with plant growth-promoting rhizobacteria (PGPR) exhibited potent inhibition of growth of P. oryzae, a significant reduction in the intensity of blast disease, and a maximum increase in growth, yield, and quality of Bali rice. In the 15th week, the intensity of blast disease decreased from 80.18% to 7.90%. The mixture of leaves extract + PGPR also improved the height of the plant, the number of tillers, number of leaves, number of grains per panicle, number of heads per panicle, and the full-grain weight per clump. Applications of various concentrations of a mixture of leaves extracts + PGPR resulted in improvement in the potential yield of rice, however, the application of 2% extracts + PGPR gave the highest potential yield of 5.61 tha−1 compared to the low yields in the control and other treatments. The high grain yield observed with the treatment was caused by the low intensity of blast disease. This treatment also strengthened the stem and prevented the drooping of the plant and improved the quality of rice grain.
Ni Luh Suriani; Dewa Ngurah Suprapta; Novizar Nazir; Ni Made Susun Parwanayoni; Anak Agung Ketut Darmadi; Desy Andya Dewi; Ni Sudatri; Ahmad Fudholi; R. Sayyed; Asad Syed; Abdallah Elgorban; Ali Bahkali; Hesham El Enshasy; Daniel Dailin. A Mixture of Piper Leaves Extracts and Rhizobacteria for Sustainable Plant Growth Promotion and Bio-Control of Blast Pathogen of Organic Bali Rice. Sustainability 2020, 12, 8490 .
AMA StyleNi Luh Suriani, Dewa Ngurah Suprapta, Novizar Nazir, Ni Made Susun Parwanayoni, Anak Agung Ketut Darmadi, Desy Andya Dewi, Ni Sudatri, Ahmad Fudholi, R. Sayyed, Asad Syed, Abdallah Elgorban, Ali Bahkali, Hesham El Enshasy, Daniel Dailin. A Mixture of Piper Leaves Extracts and Rhizobacteria for Sustainable Plant Growth Promotion and Bio-Control of Blast Pathogen of Organic Bali Rice. Sustainability. 2020; 12 (20):8490.
Chicago/Turabian StyleNi Luh Suriani; Dewa Ngurah Suprapta; Novizar Nazir; Ni Made Susun Parwanayoni; Anak Agung Ketut Darmadi; Desy Andya Dewi; Ni Sudatri; Ahmad Fudholi; R. Sayyed; Asad Syed; Abdallah Elgorban; Ali Bahkali; Hesham El Enshasy; Daniel Dailin. 2020. "A Mixture of Piper Leaves Extracts and Rhizobacteria for Sustainable Plant Growth Promotion and Bio-Control of Blast Pathogen of Organic Bali Rice." Sustainability 12, no. 20: 8490.
Consortium of bacteria (Bacillus toyonensis strain BCT-71120 and Stenotrophomonas rhizophila strain e-p10) can reduce biological oxygen demand (BOD) and chemical oxygen demand (COD) values in aerobic fermentation process of POME. This study aims to degrade the organic and inorganic compounds in POME by using anaerobic bacterial consortium of Bacillus toyonensis strain BCT-71120 and Stenotrophomonas rhizophila strain e-p10 to produce biogas and reduce the values of COD, BOD and total suspended solid (TSS). Effect of fermentation time on TSS, COD, BOD and pH are investigated. Specific growth rate and generation time are determined to obtain optimal fermentation time. The results shows that the bacterial consortium of Bacillus toyonensis strain BCT-7112 and Stenotrophomonas rhizophila strain e-p10 reduced COD, BOD and TSS values of POME and produce methane in biogas for 18 d of anaerobic fermentation process. The highest reduction of COD, BOD and TSS were 86, 94 and 80%, respectively, while the highest methane content was 41.05%. The pH values ranged from 7.8 to 8.3 as sufficient condition for the bacterial growth. The highest specific growth rate of the bacteria achieved at 0.268 1/d and the lowest generation time was 3.74 d. Values of μmax and Ks were achieved 0.174 1/d and 63.011 mg/L, respectively. Value of Y = 1.4 × 109 CFU/mg, Kd = 0.42 1/d and qmax = 1.24 × 10−10 mg/CFU.d based on BOD values. Values of μmax and Ks were achieved 0.122 1/d and 5.945 mg/L, respectively. Y = 2.41 × 109 CFU/mg, Kd = 6.60 1/d and qmax = 5.062 × 10−10 mg/CFU.d. based on COD values.
Muhammad Said; Andika Septian Sitanggang; Riski Julianda; Sri Pertiwi Estuningsih; Ahmad Fudholi. Production of methane as bio-fuel from palm oil mill effluent using anaerobic consortium bacteria. Journal of Cleaner Production 2020, 282, 124424 .
AMA StyleMuhammad Said, Andika Septian Sitanggang, Riski Julianda, Sri Pertiwi Estuningsih, Ahmad Fudholi. Production of methane as bio-fuel from palm oil mill effluent using anaerobic consortium bacteria. Journal of Cleaner Production. 2020; 282 ():124424.
Chicago/Turabian StyleMuhammad Said; Andika Septian Sitanggang; Riski Julianda; Sri Pertiwi Estuningsih; Ahmad Fudholi. 2020. "Production of methane as bio-fuel from palm oil mill effluent using anaerobic consortium bacteria." Journal of Cleaner Production 282, no. : 124424.
Dust accumulation is one of the main contributing factors for the power loss of photovoltaic (PV) modules. Dust consists of small particles that float throughout the atmosphere. Types of dust are often overlooked. This study aimed to investigate the effect of different types of dust particles on PV performance. The dust particles investigated include carbon (C), iron oxide, manganese dioxide, calcium oxide and natural dust. The first part of this study focused on the effects of the different types of pollutants on the external load. The second part examined the PV performance at variable load. The results show that the carbon to have appears the worst reduction impact on PV performance with about 99.76% in the range of density of mass from 0-20.27g/m2 and 99.9% in the range of density of mass from 0-41g/m2 in the case of fixed load and variable load respectively. The lower results reported by natural dust about with 98.92% in the range of density of mass from 0-164.38g/m2, 80% in the range of density of mass 0-123.28g/m2 for fixed and variable load respectively.
Zeki Ahmed Darwish; Kamaruzzaman Sopian; Ahmad Fudholi. Reduced output of photovoltaic modules due to different types of dust particles. Journal of Cleaner Production 2020, 280, 124317 .
AMA StyleZeki Ahmed Darwish, Kamaruzzaman Sopian, Ahmad Fudholi. Reduced output of photovoltaic modules due to different types of dust particles. Journal of Cleaner Production. 2020; 280 ():124317.
Chicago/Turabian StyleZeki Ahmed Darwish; Kamaruzzaman Sopian; Ahmad Fudholi. 2020. "Reduced output of photovoltaic modules due to different types of dust particles." Journal of Cleaner Production 280, no. : 124317.
Ahmad Fudholi. Green Technology for Drying of Herb, Food, and Agricultural Industry. Journal of Applied Agricultural Science and Technology 2020, 4, 86 -87.
AMA StyleAhmad Fudholi. Green Technology for Drying of Herb, Food, and Agricultural Industry. Journal of Applied Agricultural Science and Technology. 2020; 4 (2):86-87.
Chicago/Turabian StyleAhmad Fudholi. 2020. "Green Technology for Drying of Herb, Food, and Agricultural Industry." Journal of Applied Agricultural Science and Technology 4, no. 2: 86-87.
In previous social vulnerability studies, the use of indices in assessing social vulnerability can only describe conditions of social vulnerability in general without being able to indicate which factors are dominant in measuring the level of social vulnerability. Therefore this study aims to fill the gap by implementing the relative approach using the clustering method to characterize the dominant factors of social vulnerability in Indonesia at the district level utilizing hybridization of the Fuzzy Geographically Weighted Clustering (FGWC) with Intelligent Firefly Algorithm (IFA). Then the Kruskal-Wallis test is used to obtain the dominant factor of social vulnerability in each formed cluster. The study found that each district in Indonesia has its own prevailing social vulnerability problems. The majority of regions on the west coast of Sumatera Island, such as Nias and Mentawai District and Eastern Indonesia, such as Sumba Barat Daya and Intan Jaya District, are the districts with the most problem, particularly in socioeconomic aspects. The results of this study can be used to support the prevention, mitigation, response, and recovery for reduction disaster programs in Indonesia.
Bahrul Ilmi Nasution; Robert Kurniawan; Tiodora Hadumaon Siagian; Ahmad Fudholi. Revisiting social vulnerability analysis in Indonesia: An optimized spatial fuzzy clustering approach. International Journal of Disaster Risk Reduction 2020, 51, 101801 .
AMA StyleBahrul Ilmi Nasution, Robert Kurniawan, Tiodora Hadumaon Siagian, Ahmad Fudholi. Revisiting social vulnerability analysis in Indonesia: An optimized spatial fuzzy clustering approach. International Journal of Disaster Risk Reduction. 2020; 51 ():101801.
Chicago/Turabian StyleBahrul Ilmi Nasution; Robert Kurniawan; Tiodora Hadumaon Siagian; Ahmad Fudholi. 2020. "Revisiting social vulnerability analysis in Indonesia: An optimized spatial fuzzy clustering approach." International Journal of Disaster Risk Reduction 51, no. : 101801.
This study aimed to obtain the characteristics of lignin isolated from oil palm empty fruit bunch by using HCl. Treatments were conducted using HCl at concentrations of 10%, 20%, 30% and 40% (v/v). Increasing HCl concentrations reduced yields but increased equivalent lignin weights and methoxyl contents. Results of functional group testing via Fourier transform infrared spectroscopy showed no change in the structure of functional groups at all HCl concentrations employed. Amongst the acid concentrations employed in this work, 20% HCl produced the maximum yield (15.61%). Increases in HCl concentration could increase methoxyl contents. In this study, average methoxyl contents were in in the range of 12.4–44.95%. The equivalent weight produced in this study ranged from 200% to 250%. Scanning electron microscopy–energy-dispersive X-ray results further showed that the dominant elements were carbon, oxygen, aluminium and iron. In addition, Chromatograms and identification of lignin compounds isolated using 40% HCl were presented.
Sri Hidayati; Wisnu Satyajaya; Ahmad Fudholi. Lignin isolation from black liquor from oil palm empty fruit bunch using acid. Journal of Materials Research and Technology 2020, 9, 11382 -11391.
AMA StyleSri Hidayati, Wisnu Satyajaya, Ahmad Fudholi. Lignin isolation from black liquor from oil palm empty fruit bunch using acid. Journal of Materials Research and Technology. 2020; 9 (5):11382-11391.
Chicago/Turabian StyleSri Hidayati; Wisnu Satyajaya; Ahmad Fudholi. 2020. "Lignin isolation from black liquor from oil palm empty fruit bunch using acid." Journal of Materials Research and Technology 9, no. 5: 11382-11391.
The integration of photovoltaic technology and solar air collector is named a photovoltaic thermal (PVT) system. PVT system generates electricity as pumping power to fan DC and produces thermal energy together with to cooling PV panel. The experimental with the indoor and outdoor evaluation of PVT solar air collector have been compared at the chosen solar intensity of 820 W/m2. The mass flow rate is range from 0.01 kg/s to 0.05 kg/s. The exergy and efficiency exergy accuracy of PVT solar air collector between indoor and outdoor evaluation are 98.42%, 98.11% respectively. The exergy and exergy efficiency comparison results indicated that the indoor and outdoor investigation is suitable.
Bahtiar Bahtiar; Muhammad Zohri; Ahmad Fudholi. Experimental investigation of photovoltaic thermal solar air collector with exergy performance comparison. Indonesian Journal of Electrical Engineering and Computer Science 2020, 19, 652 -658.
AMA StyleBahtiar Bahtiar, Muhammad Zohri, Ahmad Fudholi. Experimental investigation of photovoltaic thermal solar air collector with exergy performance comparison. Indonesian Journal of Electrical Engineering and Computer Science. 2020; 19 (2):652-658.
Chicago/Turabian StyleBahtiar Bahtiar; Muhammad Zohri; Ahmad Fudholi. 2020. "Experimental investigation of photovoltaic thermal solar air collector with exergy performance comparison." Indonesian Journal of Electrical Engineering and Computer Science 19, no. 2: 652-658.
Photovoltaic technology is one of renewable energy technology very hopeful, especially photovoltaic thermal system or PVT system. A PVT system solar air collector produces hot air and electricity simultaneously. In this study, indoor and outdoor investigation comparison of PVT system solar air collector has tested at the National University of Malaysia. The indoor and outdoor investigation conducted with variation mass flow rates from 0.01 kg/s to 0.05 kg/s at the solar intensity of 820 W/m2. Indoor and outdoor evaluation is conducted to precisely evaluate the performance improvement theorized by the researcher. The comparison between the indoor and outdoor outcome purposed to confirm each testing and attraction decision. The outdoor investigation outcomes were agreement with indoor results. Indoor investigation outcomes reliably with outdoor investigation outcomes indicated by accuracy results.
Bahtiar Bahtiar; Muhammad Zohri; Ahmad Fudholi. Indoor and outdoor investigation comparison of photovoltaic thermal air collector. Bulletin of Electrical Engineering and Informatics 2020, 9, 1311 -1317.
AMA StyleBahtiar Bahtiar, Muhammad Zohri, Ahmad Fudholi. Indoor and outdoor investigation comparison of photovoltaic thermal air collector. Bulletin of Electrical Engineering and Informatics. 2020; 9 (4):1311-1317.
Chicago/Turabian StyleBahtiar Bahtiar; Muhammad Zohri; Ahmad Fudholi. 2020. "Indoor and outdoor investigation comparison of photovoltaic thermal air collector." Bulletin of Electrical Engineering and Informatics 9, no. 4: 1311-1317.