This document summarizes a study that investigated the use of hydrothermal pretreatment to enhance the enzymatic hydrolysis and glucose production from lignocellulosic biomass. Specifically:
- Sawdust samples from hardwood and softwood were treated with sodium hydroxide solution at 80±5°C for varying times. The 180 minute treatment yielded the highest cellulose content (84.9% for hardwood, 83.5% for softwood) and lowest lignin content.
- The pretreated samples were then hydrolyzed with crude enzymes from Trichoderma and Aspergillus niger fungi. The maximum glucose yields were 7.4% and 6% respectively.
- Total solid
Study of Combustion Characteristics of Fuel Briquettesijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
Biomass Refinery – a way to Produce Value Added Products from Agricultural Bi...IJMERJOURNAL
ABSTRACT: Production of furfural from pentosan in sunflower husk was carried out in an attempt to produce value-added products from sunflower husk which is commonly burnt around sunflower oil mills of India. This process involved the conversion of sunflower husk into xylose, which was then cyclodehydrated to furfural using dilute sulphuric acid. Product was characterized by volumetric process such as bromine- bromide excess method. Furfural obtained was analyzed using gas chromatography (GC) and gas chromatography with mass spectrophotometer (GC-MS). The product was colourless, but turned yellowish and then dark brown upon exposure to air and light. Furfural obtained was in liquid form, with a molecular weight of 96.2 g/mole and the formula of C5H4O2
In this study, kinetics of demineralization of chitin extraction from snail shells was
investigated. Chitin was extracted from snail shells by demineralizing the
deproteinized shells in 1.2 M HCl solution. Prior to demineralization, the raw snail
shells were deproteinized using 1 M NaOH solution to remove proteins and organic
matter present in the shells. The product was dried before the demineralization
process was carried out. The results showed that based on the R2 values obtained for
each of the shrinking core models considered which include; fluid film diffusion
(FFD), ash layer diffusion (ALD), and chemical reaction control (CRC), it was noted
that the CRC model was prevalent for all the various range of particle sizes analyzed
(6.3 – 4.75 mm, 4.75 – 2 mm, 2 – 1 mm, and 600 – 300 μm). The surface morphologies
and the Fourier Transform Infra-Red (FTIR) bands of the extracted chitin were
similar to previous studies
In present scenario natural fibers have received much attention because of their light weight, nonabrasive, combustible, nontoxic, low cost and biodegradable properties. Among the various natural fibers, banana fiber was focused for its pretreatment conditions for preparing perfect fiber. In previously many researchers have found various fibers have been pretreated and they obtain its properties and its applications. In this project banana fiber has been taken as natural fiber and it was pretreated and its properties after pretreatment were obtained. The pretreatment was alkali, sodium hydroxide, potassium permanganate treatment, and bleaching was carried out. Then the composite specimen boards were fabricated by various pretreatment banana fiber, polyethylene and matrix. It undergone to mechanical testing, tensile test, hardness test and also SEM analysis was carried out to check their microstructure. The perfect fiber was found by the obtained results from their properties and bonding nature.
The chemical (extractives and lignin) content and histological property (microscopic structure)
of tissues of Ricinodendron heudelotii (Baill, Pierre ex Pax), an angiosperm, were investigated for its potential
as a fibrous raw material for pulp and paper production. Bolts of about 70 cm were cut from the felled trees at
three different merchantable height levels of 10%, 50%, and 90% to obtain: corewood, middlewood and
outerwood samples. The fiber characteristics of the selected trees viz: the fiber length, fibre diameter and lumen
diameter were measured while the cell wall thickness was derived from the measured fibre dimensions. The
average fiber length, cell wall thickness, and lumen width, were 1.40 mm, 4.6 µm, and 32.3 µm, respectively.
The extractive and lignin contents were determined. Klason lignin content was about 30%. Extractive content of
R. heudelotii ranged from 0.41 to 0.5%. Based on these findings R. heudelotii is suitable for pulp and paper
production.
Study of Combustion Characteristics of Fuel Briquettesijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
Biomass Refinery – a way to Produce Value Added Products from Agricultural Bi...IJMERJOURNAL
ABSTRACT: Production of furfural from pentosan in sunflower husk was carried out in an attempt to produce value-added products from sunflower husk which is commonly burnt around sunflower oil mills of India. This process involved the conversion of sunflower husk into xylose, which was then cyclodehydrated to furfural using dilute sulphuric acid. Product was characterized by volumetric process such as bromine- bromide excess method. Furfural obtained was analyzed using gas chromatography (GC) and gas chromatography with mass spectrophotometer (GC-MS). The product was colourless, but turned yellowish and then dark brown upon exposure to air and light. Furfural obtained was in liquid form, with a molecular weight of 96.2 g/mole and the formula of C5H4O2
In this study, kinetics of demineralization of chitin extraction from snail shells was
investigated. Chitin was extracted from snail shells by demineralizing the
deproteinized shells in 1.2 M HCl solution. Prior to demineralization, the raw snail
shells were deproteinized using 1 M NaOH solution to remove proteins and organic
matter present in the shells. The product was dried before the demineralization
process was carried out. The results showed that based on the R2 values obtained for
each of the shrinking core models considered which include; fluid film diffusion
(FFD), ash layer diffusion (ALD), and chemical reaction control (CRC), it was noted
that the CRC model was prevalent for all the various range of particle sizes analyzed
(6.3 – 4.75 mm, 4.75 – 2 mm, 2 – 1 mm, and 600 – 300 μm). The surface morphologies
and the Fourier Transform Infra-Red (FTIR) bands of the extracted chitin were
similar to previous studies
In present scenario natural fibers have received much attention because of their light weight, nonabrasive, combustible, nontoxic, low cost and biodegradable properties. Among the various natural fibers, banana fiber was focused for its pretreatment conditions for preparing perfect fiber. In previously many researchers have found various fibers have been pretreated and they obtain its properties and its applications. In this project banana fiber has been taken as natural fiber and it was pretreated and its properties after pretreatment were obtained. The pretreatment was alkali, sodium hydroxide, potassium permanganate treatment, and bleaching was carried out. Then the composite specimen boards were fabricated by various pretreatment banana fiber, polyethylene and matrix. It undergone to mechanical testing, tensile test, hardness test and also SEM analysis was carried out to check their microstructure. The perfect fiber was found by the obtained results from their properties and bonding nature.
The chemical (extractives and lignin) content and histological property (microscopic structure)
of tissues of Ricinodendron heudelotii (Baill, Pierre ex Pax), an angiosperm, were investigated for its potential
as a fibrous raw material for pulp and paper production. Bolts of about 70 cm were cut from the felled trees at
three different merchantable height levels of 10%, 50%, and 90% to obtain: corewood, middlewood and
outerwood samples. The fiber characteristics of the selected trees viz: the fiber length, fibre diameter and lumen
diameter were measured while the cell wall thickness was derived from the measured fibre dimensions. The
average fiber length, cell wall thickness, and lumen width, were 1.40 mm, 4.6 µm, and 32.3 µm, respectively.
The extractive and lignin contents were determined. Klason lignin content was about 30%. Extractive content of
R. heudelotii ranged from 0.41 to 0.5%. Based on these findings R. heudelotii is suitable for pulp and paper
production.
A test on the production of pulp and paper from
durian hides has been carried out with cooking temperature of
135 OC for a duration of 1.5 hours in a liquid of 2% : 3% : 4%
NaOH with comparison of durian hide fragment : cooking liquid
1:6. Durian hides possesses grinding level of 180 CSF, cracking
index of 0.6 kPa.m2
/gr and low tension index namely 15 Nm/gr.
The composition of the mixture of durian hide pulp (3% NaOH)
with Old Currugated Carbon (OCC) is (100%:0); (90%:10%);
(80%:20%), (70%:30%). To the grinding level of 300 ml CSF,
starch of 1% and sizing agent (AKD) 1% is added. Physical
characteristics of the paper sheet possesses gramature of 54.5
gr/m2
, thickness 0.321 mm, tensile strength 1.13 kN/m, tearing
strength 253 mN, Porosity (Bensten) 2050 ml/minute and
roughness (Bensten) 1700 ml/minute. The paper grammage had
not fulfilled basic paper specification for plastic laminated
wrapping paper, SNI 14-6519-2001.
Bio-char can be produced by thermal conversion of
biomass. Palm shells were obtained from palm fruits (palmira).
They were air-dried to remove moisture. The dried palm shells
were ground to become powder and heated at 600ºC, 800ºC and
1000ºC for 2 h respectively. After heating, bio-char was obtained.
Structural properties of palm shell powder and bio-char were
examined by X-ray diffraction (XRD). Scanning electron
microscopy (SEM) was used to observe microstructure of biochar.
Properties such as hydration capacity, pH were also
evaluated.
Performance evaluation of bituminous concrete incorporating crumb rubber and ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Bonding Performance of Maltodextrin and Citric Acid for Particleboard Made Fr...UniversitasGadjahMada
Maltodextrin and citric acid are two types of natural materials with the potential as an eco-friendly binder. Maltodextrin is a natural substance rich in hydroxyl groups and can form hydrogen bonds with lignoselulosic
material, while citric acid is a polycarboxylic acid which can form an ester bond with a hydroxyl group at lignoselulosic material. The combination of maltodextrin and citric acid as a natural binder materials supposed
to be increase the ester bonds formed within the particleboard. This research determined to investigate the bonding properties of a new adhesive composed of maltodextrin/citric acid for nipa frond particleboard. Maltodextrin and citric acid were dissolved in distillated water at the ratios of 100/0, 87.5/12.5, 75/25 and 0/100, and the concentration of the solution was adjusted to 50% for maltodextrin and 60% citric acid (wt%). This adhesive solution was sprayed onto the particles at 20% resin content based on the weight of oven dried particles. Particleboards with a size of 25 × 25 × 1 cm, a target density 800 kg/m3 were prepared by hot-pressing at press temperatures of 180 degrees or 200 degrees, a press time of 10 minute and board pressure 3.6 MPa. Physical and mechanical properties of particleboard were tested by a standard method (JIS A 5908). The results showed that added citric acid level in maltodextrin/citric acid composition and hot-pressing temperature had affected to the properties of particleboard. The optimum properties of the board were achieved at a pressing temperature of 180 degrees and the addition of only 20% citric acid. The results also indicated that the peak intensity of C=O group increased and OH group decreased with the addition of citric acid and an increase in the pressing temperature, suggesting an interreaction between the hydroxyl groups from the lignocellulosic materials and carboxyl groups from citric acid to form the ester groups.
Fabrication and evaluation of nano carbon reinforced polymer compositeseSAT Journals
Abstract In this study the suitability of using nano carbon as a new raw material for thermoset composites is investigated. The study evaluates the mechanical properties of nano carbon composites. The nano carbon from Biomass (waste material of Zea Mays) is used as a reinforcement material with the matrix resin for preparing the composites. The composites developed by hand molding technique are varied with weight percentage of nano carbon (0.1%, 0.2%, 0.3%, and 0.4% up to 1.5%). The developed natural nano carbon reinforced polymer composites were characterized by mechanical properties. The composites reinforced with 0.5 & 0.6 wt% of nano carbon particles have shown better mechanical strength. The properties of sourghum based nano carbon/Epoxy composites are greater than that of epoxy resin matrix composites even for a little amount of carbon reinforcement.\ Keywords— Nano carbon, Polymers, Mechanical Properties
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Water Absorption, Thickness Swelling and Rheological Properties of Agro Fiber...iosrjce
IOSR Journal of Polymer and Textile Engineering (IOSR-JPTE) is ambitious to disseminate information and experience in education, practice and investigation between polimer, fibric and all the sciences involved in textile.
A Feasibility Study on Production of Solid Fuel from Glycerol and Agricultura...drboon
A main goal of the study is to produce solid fuel from glycerol and agricultural wastes in order to find an alternative energy suitable for household usage. In the study, durian shell and bagasse, which are leftover raw materials, were selected to be mixed with by-product glycerol waste from biodiesel process. Durian shell and bagasse were dried and grinded before mixing process. Heating values of each raw material were measured using an adiabatic bomb calorimeter. In order to evaluate feasibility of the production, the various mixing proportions of the mixture were tested by several means, i.e. strength test, heating value measurement, and exhaust gas analysis.
A test on the production of pulp and paper from
durian hides has been carried out with cooking temperature of
135 OC for a duration of 1.5 hours in a liquid of 2% : 3% : 4%
NaOH with comparison of durian hide fragment : cooking liquid
1:6. Durian hides possesses grinding level of 180 CSF, cracking
index of 0.6 kPa.m2
/gr and low tension index namely 15 Nm/gr.
The composition of the mixture of durian hide pulp (3% NaOH)
with Old Currugated Carbon (OCC) is (100%:0); (90%:10%);
(80%:20%), (70%:30%). To the grinding level of 300 ml CSF,
starch of 1% and sizing agent (AKD) 1% is added. Physical
characteristics of the paper sheet possesses gramature of 54.5
gr/m2
, thickness 0.321 mm, tensile strength 1.13 kN/m, tearing
strength 253 mN, Porosity (Bensten) 2050 ml/minute and
roughness (Bensten) 1700 ml/minute. The paper grammage had
not fulfilled basic paper specification for plastic laminated
wrapping paper, SNI 14-6519-2001.
Bio-char can be produced by thermal conversion of
biomass. Palm shells were obtained from palm fruits (palmira).
They were air-dried to remove moisture. The dried palm shells
were ground to become powder and heated at 600ºC, 800ºC and
1000ºC for 2 h respectively. After heating, bio-char was obtained.
Structural properties of palm shell powder and bio-char were
examined by X-ray diffraction (XRD). Scanning electron
microscopy (SEM) was used to observe microstructure of biochar.
Properties such as hydration capacity, pH were also
evaluated.
Performance evaluation of bituminous concrete incorporating crumb rubber and ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Bonding Performance of Maltodextrin and Citric Acid for Particleboard Made Fr...UniversitasGadjahMada
Maltodextrin and citric acid are two types of natural materials with the potential as an eco-friendly binder. Maltodextrin is a natural substance rich in hydroxyl groups and can form hydrogen bonds with lignoselulosic
material, while citric acid is a polycarboxylic acid which can form an ester bond with a hydroxyl group at lignoselulosic material. The combination of maltodextrin and citric acid as a natural binder materials supposed
to be increase the ester bonds formed within the particleboard. This research determined to investigate the bonding properties of a new adhesive composed of maltodextrin/citric acid for nipa frond particleboard. Maltodextrin and citric acid were dissolved in distillated water at the ratios of 100/0, 87.5/12.5, 75/25 and 0/100, and the concentration of the solution was adjusted to 50% for maltodextrin and 60% citric acid (wt%). This adhesive solution was sprayed onto the particles at 20% resin content based on the weight of oven dried particles. Particleboards with a size of 25 × 25 × 1 cm, a target density 800 kg/m3 were prepared by hot-pressing at press temperatures of 180 degrees or 200 degrees, a press time of 10 minute and board pressure 3.6 MPa. Physical and mechanical properties of particleboard were tested by a standard method (JIS A 5908). The results showed that added citric acid level in maltodextrin/citric acid composition and hot-pressing temperature had affected to the properties of particleboard. The optimum properties of the board were achieved at a pressing temperature of 180 degrees and the addition of only 20% citric acid. The results also indicated that the peak intensity of C=O group increased and OH group decreased with the addition of citric acid and an increase in the pressing temperature, suggesting an interreaction between the hydroxyl groups from the lignocellulosic materials and carboxyl groups from citric acid to form the ester groups.
Fabrication and evaluation of nano carbon reinforced polymer compositeseSAT Journals
Abstract In this study the suitability of using nano carbon as a new raw material for thermoset composites is investigated. The study evaluates the mechanical properties of nano carbon composites. The nano carbon from Biomass (waste material of Zea Mays) is used as a reinforcement material with the matrix resin for preparing the composites. The composites developed by hand molding technique are varied with weight percentage of nano carbon (0.1%, 0.2%, 0.3%, and 0.4% up to 1.5%). The developed natural nano carbon reinforced polymer composites were characterized by mechanical properties. The composites reinforced with 0.5 & 0.6 wt% of nano carbon particles have shown better mechanical strength. The properties of sourghum based nano carbon/Epoxy composites are greater than that of epoxy resin matrix composites even for a little amount of carbon reinforcement.\ Keywords— Nano carbon, Polymers, Mechanical Properties
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Water Absorption, Thickness Swelling and Rheological Properties of Agro Fiber...iosrjce
IOSR Journal of Polymer and Textile Engineering (IOSR-JPTE) is ambitious to disseminate information and experience in education, practice and investigation between polimer, fibric and all the sciences involved in textile.
A Feasibility Study on Production of Solid Fuel from Glycerol and Agricultura...drboon
A main goal of the study is to produce solid fuel from glycerol and agricultural wastes in order to find an alternative energy suitable for household usage. In the study, durian shell and bagasse, which are leftover raw materials, were selected to be mixed with by-product glycerol waste from biodiesel process. Durian shell and bagasse were dried and grinded before mixing process. Heating values of each raw material were measured using an adiabatic bomb calorimeter. In order to evaluate feasibility of the production, the various mixing proportions of the mixture were tested by several means, i.e. strength test, heating value measurement, and exhaust gas analysis.
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online
Synthesis and Characterization of Cellulose Nanofibers From Coconut Coir FibersIOSR Journals
Cellulose nanofibers were isolated from coconut coir fibers by chemical treatment using alkaline, mineral acids and inorganic salts, followed by mechanical treatment and disintegration methods like sonication, cryo crushing and dissolution. The size and morphology of cellulose nanofibers were investigated by using the Field Emission Scanning Electron Microscope (FESEM). The width of synthesized cellulose nanofibers investigated by the FESEM was around 30 nm to 90 nm and few microns in length. Elemental analysis of cellulose nano fibers were confirmed with the Energy Dispersive Analysis (EDS) results. XRD study was conducted for the crystalline property of cellulose nanofibers synthesized from coconut coir fibers using standard microcrystalline cellulose as reference. FT-IR spectra confirmed the presence of hydroxyl groups, C-H bond and the C-O-C groups in the synthesized cellulose nanofibers. The cellulose nano fibers were successfully utilized in the preparation of transparent thin film, filtration and water treatment.
Effects of Varying Particle Size On Mechanical and Combustion Characteristics...inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Development and Characterization of Cardanol Based Polymer Reinforced Fibre B...YogeshIJTSRD
The emerging quest for optimal use of naturally obtained resources through advanced technigues and products has escalated research and exploration of naturally oriented renewable materials. In present investigation, cardanol, obtained from cashew nut shell liquid CNSL , was utilized as base material for a thermosetting polymer TP development. Furthermore, rice husks flour RHF was utilized as reinforcement for the TP. The fabricated biocomposite was characterized for microstructure, thermal behavior and biodegradability. Results from DSC and TG analysis revealed that the sample filled with 5 wt. NaOH modified RHF demonstrated most superior thermal stability, and tensile strength. Moreover, results from FESEM revealed uniform dispersion, and bonding to polymer matrix. Enhanced biodegradability was realized from NaOH modified RHF filled biocomposite post 90 days of monitored soil tests. Therefore, the cardanol obtained TP and biocomposites demonstrated good prospects for application in the electronics, automotive and furniture industry. Iheoma Chigoziri Nwuzor | Jeremiah Lekwuwa Chukwuneke | Chinomso Macanthony Ewulonu | Paul Chukwulozie Okolie "Development and Characterization of Cardanol-Based Polymer Reinforced Fibre Bicomposites" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-3 , April 2021, URL: https://www.ijtsrd.com/papers/ijtsrd40010.pdf Paper URL: https://www.ijtsrd.com/engineering/textile-engineering/40010/development-and-characterization-of-cardanolbased-polymer-reinforced-fibre-bicomposites/iheoma-chigoziri-nwuzor
Investigation of carbonisation of wheat stems from central Europe during slow...Agriculture Journal IJOEAR
Abstract— Slow pyrolysis of wheat stems from south-west Thuringia in Central Germany favours the interaction of lignin, cellulose and hemicellulose. As a result, after low pyrolysis temperatures of 600 °C, 800 °C or 1000 °C crystallinity of bio-carbon is pronounced. As shown by Raman spectroscopy, with increasing pyrolysis temperature, the intensity ratio ID/IG of D band to G band increases. This gives evidence of a growing amount of aromatic graphitic rings with a lot of disorder in the carbonaceous biogenetic material. With increasing pyrolysis temperature more 6-fold, still defective carbon rings form out of the amorphous sp2-C-C matrix. High resolution transmission electron microscopy identifies parallel layers of crystalline carbon that are oriented in bands after pyrolysis at 800 °C. This degree of order after a relatively low pyrolysis temperature is excellent. For many applications, regulated and oriented crystallinity is essential. Steering the orientation and fraction of crystalline bio-carbon could be favourable for producing carbon fibres of higher quality from suitable biomass. By regulating the composition of lignin to cellulose, hemicelluose or other substances, the bio-carbon crystallinity could be adjusted.
Optimization of process parameters for the production of l glutaminase with m...eSAT Journals
Abstract L-Glutaminase, an amidohydrolase enzyme has been a choice of interest in the treatment of leukaemia since the discovery of its anti-tumour properties. Because it is a potent anti leukemic agent and a flavor-enhancing agent used in the food industry, many researchers have focused their attention on L-glutaminase. L-Glutaminase is majorly produced by micro organisms including bacteria, yeast and fungi. In the present study, production of L-Glutaminase from fungi, Aspergillus wentii was reported. Solid state fermentation was followed in the study for the enzyme production using different agro-industrial by products which include coconut oil cake, sesame oil cake, groundnut oil cake and neem oil cake. Out of them potential substrates were screened and used as mixed substrate. Mixed substrate was selected by mixing coconut oil cake and sesame oil cake in different compositions. The best composition, 1.25gm coconut oil cake and 3.75gm sesame oil cake was selected. Effect of process parameters namely temperature, pH, incubation time, moisture content, inoculum volume on enzyme production was investigated. Also effect of supplementary carbon sources, nitrogen sources, metal ions and glutamine concentration was studied and their optimum conditions were determined. The organism produced high levels of enzyme at an optimum temperature of 28C and optimum pH 7.0, after 120h of incubation with 40% inoculum volume and 50% moisture content. Enhanced production was obtained on addition of 1% W/V D-glucose, peptone, magnesium sulphate and 1% W/W glutamine as supplements which showed an increase to four folds. Using this optimized media components and parameters; the L-Glutaminase activity 496U/gds was obtained. Keywords: L-Glutaminase, leukaemia, Aspergillus wentii, solid state fermentation, mixed substrate
Chemical and Physical properties of Cassava Starch-Cm-Chitosan-Acrylic Acid Hydrogel prepared from radiation –induced crosslinking
Gatot Trimulyadi Rekso
Center for Application of Isotopes and Radiation- National Nuclear Energy Agency
Jl. Lebak Bulus Raya No. 49, Jakarta-Selatan, Indonesia
Corresponding author; e-mail; gatot2811@yahoo.com ,
Fax: +62-21-.7513270, HP ; 08129419442
Production and Purification of Amylase from Bacillus subtilis Isolated from SoilDr. Amarjeet Singh
In spite of progress in biotechnology and
enzymology, the enzymes have been industrialized in recent
years for the mounting up the product development in
various arena. The ultimate goal of this study comprises the
production and purification the amylase enzyme from the
bacterial strain. A powerful amylase producer, Bacillus
subtilis ISOLATE-4 was isolated, screened and identified
from the soil sample. In order to produce extracellular
amylase, various physico-chemical parameters were
optimized. During optimization, the maximal production of
amylase by the isolate at 48 hrs of incubation in 100 rpm was
found to be 6.93U/ml, 5.94U/ml, 6.0U/ml at 45ºC, pH 6 with
1% substrate concentration respectively. Ammonium
sulphate fractionation was done for rapid precipitation of the
amylase at a concentration of 60% and exposed to dialysis
showed the 25% purification fold of an enzyme. The dialyzed
product was further subjected to DEAE-Cellulose column
chromatography resulted in an increase up to 75%
purification fold than crude enzyme. The amylase enzyme
might be suitable for the liquefaction of starch, detergent,
textile and several additional industrial applications.
Comparative Evaluation of Fiber-glass Reinforced Plastic and Metal Biogas Dig...theijes
A 0.35m3 capacity anaerobic digestion unit for producing biogas from poultry waste in the rural communities
was designed, fabricated and tested for performance. The entire unit was made of fiber glass reinforced plastics
(FRP) to ensure good quality of the product. After construction and assembly, the biogas digestion unit was
tested and compared with a metal bio-digester of the same capacity. In each digester, 90kg poultry waste was
diluted with 191 kg of water and subjected to a retention period (45days) to make a substrate (slurry) of 8%
total solid (TS). Results showed a cumulative gas yield of 2.28m3 for the metal digester and 1.33m3 for the FRP
digester after 45 days retention period at average substrate temperature of between 250C and 34.50C while the
daily ambient temperatures varied from 24.50C to 320C and a pH of 7.92 to 9.57 for the FRP digester and 8.01
to 9.67 for the metal digester. T-test analysis of the parameters showed significant differences in the pH, biogas
volume and in temperature. It is recommended that further research be carried out on the FRP digester using
other waste substrates/co-digestion of substrates to test its efficiency in terms of biogas production.
Statistical Optimization of Keratinase Production from Marine FungusIJERA Editor
To improve the yield of keratinase from marine fungus Scopulariopsis brevicaulis, different medium constituents were optimized using response surface methodology (RSM) based on central composite design (CCD). The strain produced 24.8U/mL and 36.4U/mL of keratinase activity in conventional method of optimization with glucose and soya bean meal as carbon and nitrogen sources. Response surface methodology which was applied to optimize concentrations of glucose, soya bean meal, feather powder and inoculum level, improved the productivity to 225.0U/mL. This value represents 6.18 fold increases in productivity as compared to conventional methods. Optimal parameters of the cultivation process were determined as glucose 1.52g/L, soya bean meal-1.08g/L, feather powder-1.04g/L and inoculum level-10.6%.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/