Kuswandi B.,University of Jember
Environmental Chemistry Letters | Year: 2017
Nanotechnology has found many applications in various fields. Nanotechnology promises many interesting changes for a better life, such as to improve health, wealth, products and quality of life, as well as reducing impact on the environment. Food nano-packaging is, however, still poorly developed despite several potentials to improve packaging materials and functions. This article reviews recent advances in food nano-packaging, including bio-based packaging, improved packaging, active packaging and smart packaging. Bio-based packaging, including biodegradable packaging and biocompatible packaging, is an alternative to actual packaging that uses non-degradable plastic polymers. Improved packaging focusses on nanomaterials that improve barrier properties, strength, flexibility and stability. Active packaging is based upon active nanomaterials such as antimicrobials and oxygen scavenging materials. Smart packaging refers to smart functions provided by nanomaterials, such as nanosensors and nanodevices that detect freshness or monitor changes in packaging integrity. © 2017 Springer International Publishing Switzerland
Ma'Ruf M.F.,University of Jember |
Darjanto H.,Narotama University
Procedia Engineering | Year: 2017
Excessive lateral deformation occurred during the excavation construction exceeded the design criteria. Scrutiny evaluation should be employed to investigate the factor triggering the problems. The evaluation was conducted using numerical analysis by means of PLAXIS 2D 2011. Back calculation modeling results showed that soil investigation did not capture the field condition properly. The existence of small pound and stream next to the field was not taken into account due to the distance of borehole location. Structural work was proposed to overcome the excessive lateral deformation. © 2017 The Authors.
Harsono S.S.,Leibniz Institute for Agricultural Engineering |
Harsono S.S.,University of Jember |
Grundmann P.,Leibniz Institute for Agricultural Engineering |
Soebronto S.,Research Development PT. Asam Jawa
Journal of Cleaner Production | Year: 2014
The effluents from palm oil mills for biodiesel production are generally treated in open ponds, causing large amounts of greenhouse gas (GHG) emissions. This study assesses the use of palm oil mill effluents (POME) as feedstock to produce biogas via anaerobic digestion. Biogas from POME can be converted into electricity and heat to eventually reduce the greenhouse gas (GHG) emissions of biodiesel production from palm oil. This study is using two system boundaries, firstly, system a "gate-to-gate" concerning the POME treatments, and secondly a "cradle-to-gate/total combustion" when we assess the impact of varying POME treatments within the biodiesel chain. The research draws on field and experimental data from palm oil and biogas production in Sumatra, Indonesia. The findings show that the energy output from the conversion of POME to methane via anaerobic digestion and the subsequent combustion of the methane in a combined heat-power plant exceeds the energy consumption of the palm oil milling process. Treating POME in an anaerobic digester and using the biogas to generate electricity and heat has the potential to significantly reduce the GHG emissions of biodiesel production from palm oil. In the studied case, the energy output from the conversion of POME to electricity and heat is 0.44 MJ kg -1 biodiesel and the net energy yield is 0.42 MJ kg-1 biodiesel. The ratio of energy output to energy input of the conversion process is about 23.1. The potential reduction of GHG emissions is 658 g CO 2-eq kg-1 biodiesel or 15.96 g CO2-eq MJ -1. This is equivalent to about 33% of the total GHG emissions of biodiesel production from palm oil. Against this background we recommend to further develop and implement the treatment of POME in anaerobic digestion combined with the purposeful use of the methane, electricity and heat produced from the POME. This can make a significant contribution toward meeting international targets of emissions reduction for biodiesel production. © 2013 Elsevier Ltd. All rights reserved.
Sari P.,University of Jember |
Wijaya C.H.,Bogor Agricultural University |
Sajuthi D.,Bogor Agricultural University |
Supratman U.,Padjadjaran University
Food Chemistry | Year: 2012
The colour and stability properties of jambolan anthocyanins, both natural and copigmented forms, were investigated in beverage model as well as their radical scavenging ability. Natural anthocyanins of jambolan revealed low colour intensity due to glycosylation structure of the anthocyanins as diglucoside. The intermolecular copigmentation of anthocyanins with sinapic acid, caffeic acid, ferulic acid, and rosemary polyphenolic extract could enhance the colour intensity, which was observed through spectrometric parameters, such as hyperchromic effect (ΔA vis-max) and bathochromic shift (Δλ vis-max). In addition of sinapic acid, caffeic acid, and rosemary polyphenolics also increased the stability of the anthocyanin colour during exposure to white fluorescent light and storage at refrigeration and room temperatures, whereas on high thermal treatments, this phenomenon was not observed. Furthermore, beverage model coloured with natural or copigmented anthocyanins revealed DPPH radical-scavenging activity. The AEAC values indicated that the beverage models with copigmented anthocyanins had higher scavenging activity than the beverage with natural anthocyanins. © 2011 Elsevier Ltd. All rights reserved.
Anam K.,University of Jember |
Anam K.,University of Technology, Sydney |
Al-Jumaily A.A.,University of Technology, Sydney
Procedia Engineering | Year: 2012
To get a compliant active exoskeleton controller, the force interaction controllers are mostly used in form of either the impedance or admittance controllers. The impedance or admittance controllers can only work if they are followed by either the force or the position controller respectively. These combinations place the impedance or admittance controller as high-level controller while the force or position controller as low-level controller. From the application point of view, the exoskeleton controllers are equipped by task controllers that can be formed in several ways depend on the aims. This paper presents the review of the control systems in the existing active exoskeleton in the last decade. The exoskeleton control system can be categorized according to the model system, the physical parameters, the hierarchy and the usage. These considerations give different control schemes. The main consideration of exoskeleton control design is how to achieve the best control performances. However, stability and safety are other important issues that have to be considered. © 2012 The Authors.
Kuswardhani N.,University of Jember |
Kuswardhani N.,Asian Institute of Technology |
Soni P.,Asian Institute of Technology |
Shivakoti G.P.,Asian Institute of Technology
Energy | Year: 2013
This paper estimates energy consumption per unit floor area of greenhouse and open field for tomato, chili and lettuce production. Primary data were collected from 530 vegetable farmers during Jan-Dec, 2010 in West Java, Indonesia. Energy estimates were calculated from actual amount of inputs and outputs and corresponding conversion factors. Results reveal that the total input energy used in greenhouse (GH) production of tomato, chili (medium and high land) and lettuce were 47.62, 41.55, 58.84, and 24.54 GJ/ha respectively. Whereas, the requirement of total input energy for open field (OF) production of tomato, chili (medium and high land) and lettuce were 49.01, 41.04, 57.94 and 23.87 GJ/ha, respectively. The ratio of output to input energy was higher in greenhouse production (0.85, 0.45 and 0.49) than open field vegetable production (0.52, 0.175 and 0.186) for tomato, chili medium land and chili highland, respectively, but output-input ratio of lettuce open field production was twice as that of greenhouse vegetable production. Financial analysis revealed higher mean net returns from greenhouse vegetable production as 7043 $/ha (922-15,299 $/ha) when compared to 571 $/ha (44-1172 $/ha) from open field vegetable production. Among the greenhouse vegetables, tomato cultivation was the most profitable in terms of energy efficiency and financial productivity. © 2013 Elsevier Ltd.
Hariadi Y.,University of Tasmania |
Hariadi Y.,University of Jember |
Marandon K.,Polytechnic Institute of LaSalle Beauvais |
Tian Y.,Northeast Normal University |
And 2 more authors.
Journal of Experimental Botany | Year: 2011
Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) were studied by exposing plants to six salinity levels (0-500mM NaCl range) for 70d. Salt stress was administered either by pre-mixing of the calculated amount of NaCl with the potting mix before seeds were planted or by the gradual increase of NaCl levels in the irrigation water. For both methods, the optimal plant growth and biomass was achieved between 100mM and 200mM NaCl, suggesting that quinoa possess a very efficient system to adjust osmotically for abrupt increases in NaCl stress. Up to 95% of osmotic adjustment in old leaves and between 80% and 85% of osmotic adjustment in young leaves was achieved by means of accumulation of inorganic ions (Na+, K+, and Cl -) at these NaCl levels, whilst the contribution of organic osmolytes was very limited. Consistently higher K+ and lower Na+ levels were found in young, as compared with old leaves, for all salinity treatments. The shoot sap K+ progressively increased with increased salinity in old leaves; this is interpreted as evidence for the important role of free K+ in leaf osmotic adjustment under saline conditions. A 5-fold increase in salinity level (from 100mM to 500mM) resulted in only a 50% increase in the sap Na+ content, suggesting either a very strict control of xylem Na+ loading or an efficient Na+ removal from leaves. A very strong correlation between NaCl-induced K+ and H+ fluxes was observed in quinoa root, suggesting that a rapid NaCl-induced activation of H+-ATPase is needed to restore otherwise depolarized membrane potential and prevent further K+ leak from the cytosol. Taken together, this work emphasizes the role of inorganic ions for osmotic adjustment in halophytes and calls for more in-depth studies of the mechanisms of vacuolar Na+ sequestration, control of Na+ and K+ xylem loading, and their transport to the shoot. © 2010 The Author.
Negara M.A.P.,University of Jember
Proceedings - 2015 International Electronics Symposium: Emerging Technology in Electronic and Information, IES 2015 | Year: 2015
These days, dentists used a conventional method to measure malocclusion complexity level, which is to manually measure the patient's mold teeth. That way of measuring needs lots of time, which can be said that it has less efficiency and effectiveness in regard of time and cost. In this research, we make more modern malocclusion measurement equipment. This equipment is made using an electronic sensor in which allows faster measurement. The sensor we used is flux sensor in which is used to measure overjet and overbite on central incisor. The result gained from measuring using this equipment when compared with manual measurement will give an accurate value of more than 80% (except for a single measurement which gave a 490% error). The lowest error is at 0% and the highest error is at 19%. © 2015 IEEE.
Nuriman,University of Jember |
Kuswandi B.,University of Jember |
Verboom W.,University of Twente
Sensors and Actuators, B: Chemical | Year: 2011
A novel methodology for the determination of Hg(II) ions was developed based on optical fiber chemical sensing in a microfluidic device containing a selective tripodal chromoionophore (i.e. tris[2-(4-phenyldiazenyl)phenylamino) ethoxy]cyclotriveratrylene/TPPECTV)-PVC film. Absorbance detection was performed by incorporating a single optical fiber on the top and the bottom of the detection zone of the microfluidic device. In this micro-sensing system, the intensity of the absorption maximum at 495 nm of the TPPECTV-Hg(II) complex linearly increases as a function of the Hg(II) ion concentration in the range 1.0 × 10-6 to 2.5 × 10-4 M, with a detection limit of 0.5 μM. Interference from other heavy metal ions was not observed at significant levels. The absorbance results of the detection of Hg(II) ions in environmental water samples (river water) are in good agreement with those obtained by a macro-scale system (cold vapor atomic absorption spectrometry/CVAAS). © 2011 Elsevier B.V.
Ma'ruf M.F.,University of Jember
Ecological Engineering | Year: 2012
Apus bamboo (Gigantochloa Apus) is one of predominant vegetation in Indonesia. Direct shear test with large box sample was utilized to investigate shear strength behavior of Apus bamboo reinforced soil. Soil-root volume ratio is proposed to quantify root density at soil mass. The results show that peak shear strength of bamboo root reinforced soil increase with increasing soil-root volume ratio. Their relationships could be approached linearly. Though soil-root volume ratio investigated was only up to 5%, it generated up to 55% additional peak shear strength. © 2012 Elsevier B.V.