scholarly journals Effect of Chitosan, Clay, and CMC on Physicochemical Properties of Bioplastic from Banana Corm with Glycerol.

2021 ◽  
Vol 10 (1) ◽  
pp. 31-35
Author(s):  
Agung Sugiharto ◽  
Adilla Syarifa ◽  
Nindita Handayani ◽  
Rizky Mahendra
Keyword(s):  
Tensile Strength ◽  
Physicochemical Properties ◽  
Physical Properties ◽  
Organic Material ◽  
Chemical Properties ◽  
The Other ◽  
Physical Chemical ◽  
Composition Variation ◽  
Elongation Percentage

Bioplactic from banana corm and glycerol has been studied in this research. In addition, the physical chemical properties of it has been improved by adding chitosan, clay and CMC as filler and glycerol as plasticizer. Plastic that produced form organic material such as starch usually has poor properties in physical and mechanical. Composition variation of chitosan, clay and CMC as filler then combined by variation of glycerol as plasticizer have produced significant improve of the bioplastic physical properties. Properties of the bioplastic that studied in this research was focused to biodegradation, elongation, and tensile strength. The addition of fillers and plasticizers is carried out to produce a better bioplastics. This study used 3 variations of the filler composition : 4, 5, and 6 grams and 2 variations of the plasticizer composition: 1 ml and 2 ml. The bioplastics that produced were tested for tensile strength, elongation, and biodegradation of the soil for 7 days. The best tensile strength results is 8.43 MPa for bioplastic that using CMC fillers. On the other side, the best elongation percentage is 9.87% for bioplastic which using CMC fillers. The bioplastic that added Clay as filler can be degraded up to 100% in 7 days.

scholarly journals Properties of Agave angustifolia Haw. bagasse before and after its composting.

2015 ◽  
Vol 6 (4) ◽  
pp. 418 ◽  
Author(s):  
Gabino A. Martínez-Gutiérrez ◽  
Yolanda D. Ortiz-Hernández ◽  
Teodulfo Aquino-Bolaños ◽  
Angélica Bautista-Cruz ◽  
Juana Y. López-Cruz
Keyword(s):  
Physicochemical Properties ◽  
Physical Properties ◽  
Dry Matter ◽  
Chemical Properties ◽  
Reference Intervals ◽  
The Other ◽  
Agave Angustifolia ◽  
Before And After ◽  
Mature Compost ◽  
And Chemical Properties

The industry of mezcal (Agave spp.) in Oaxaca, Mexico annually generates more than one hundred thousand tons of bagasse. With the aim of using this by-product as an alternative organic substratum, there were analyzed the physical, physicochemical and chemical properties before and after the composting of the bagasse of the A. angustifolia Haw with 0, 90 and 180 days of aging. Before the composting, all the physicochemical properties were different for the aging periods except for humidity and dry matter. During the composting process the temperature of the three materials was superior to 58oC, and after 105 days it was obtained mature compost, free of feces. The physicochemical and chemical properties of the three composts were different for the aging periods and most of them were not placed between the reference intervals, except in the C/N relation, contrary to most of the other physical properties.

Polymer-Graphene Nanoassemblies and their Applications in Cancer Theranostics

2020 ◽  
Vol 20 (11) ◽  
pp. 1340-1351 ◽  
Author(s):  
Ponnurengam M. Sivakumar ◽  
Matin Islami ◽  
Ali Zarrabi ◽  
Arezoo Khosravi ◽  
Shohreh Peimanfard
Keyword(s):  
Mechanical Stability ◽  
Chemical Properties ◽  
The Other ◽  
Hydrophilic Polymer ◽  
Two Dimensional ◽  
Normal Tissues ◽  
Physical Chemical ◽  
Anti Cancer ◽  
Good Biocompatibility ◽  
Cancer Theranostics

Background and objective: Graphene-based nanomaterials have received increasing attention due to their unique physical-chemical properties including two-dimensional planar structure, large surface area, chemical and mechanical stability, superconductivity and good biocompatibility. On the other hand, graphene-based nanomaterials have been explored as theranostics agents, the combination of therapeutics and diagnostics. In recent years, grafting hydrophilic polymer moieties have been introduced as an efficient approach to improve the properties of graphene-based nanomaterials and obtain new nanoassemblies for cancer therapy. Methods and results: This review would illustrate biodistribution, cellular uptake and toxicity of polymergraphene nanoassemblies and summarize part of successes achieved in cancer treatment using such nanoassemblies. Conclusion: The observations showed successful targeting functionality of the polymer-GO conjugations and demonstrated a reduction of the side effects of anti-cancer drugs for normal tissues.

Preparation of Glass-Ceramics Using Molybdenum Tailings

2011 ◽  
Vol 284-286 ◽  
pp. 1431-1434 ◽  
Author(s):  
Jin Rui Zhang ◽  
Ru Wang
Keyword(s):  
Heat Treatment ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Crystalline Phase ◽  
Glass Ceramics ◽  
Chemical Properties ◽  
The Other ◽  
Raw Material ◽  
Physical Chemical ◽  
Nucleation Agents

In order to utilization the molybdenum tailings which be deposited in large quantities. Test used it to prepare glass-ceramics as main raw material, TiO2 as nucleation agents and CaO-Al2O3-SiO2 system and wollastonite as the principal crystalline phase. Heat treatment system of glass-ceramics was based on the differential thermal analysis. The crystalline phase, microstructure and characteristics of glass-ceramics were analysis by XRD, SEM and physical, chemical properties test. The result shows that the performance of glass-ceramics was superior to the other types of building decoration stone.

scholarly journals A CONTRIBUTION TO THE HYDROCHEMISTRY AND WATER TYPOLOGY OF THE AMAZON RIVER AND ITS TRIBUTARIES

2019 ◽  
Vol 20 (72) ◽  
pp. 360-374 ◽  
Author(s):  
Maria do Socorro Rocha da Silva ◽  
Eduardo Antonio Ríos-Villamizar ◽  
Hillândia Brandão da Cunha ◽  
Sebastião Átila Fonseca Miranda ◽  
Sávio José Filgueiras Ferreira ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Physicochemical Properties ◽  
Amazon Basin ◽  
The Other ◽  
Amazon River ◽  
Left Bank ◽  
Guiana Shield ◽  
Ionic Charge ◽  
Physical Chemical ◽  
Geological Diversity

The geological diversity of the Amazon Basin, as well as the pluvial regime, influences the characteristics of the waters. To know the water types of the rivers of the Amazon basin, 288 superficial water samples were collected, 94 of them along the Amazon River and 194 in their tributaries, from March 2009 to September 2012. The physical, chemical, and physicochemical properties were analyzed. Rivers with pH between 6.5 and 7.6 and electrical conductivity (40.00 - 80.00 μS cm-1) are water bodies that are influenced by the Andean region (e.g., the Amazon River and some of its right bank tributaries). On the other hand, the rivers with pH in the range of 3.5 to 5.5 and conductivity <30.00 μS cm-1, which are Amazon River’s left bank tributaries, reflect the characteristics of the Guiana Shield. The rivers with pH (6.0 to 7.0), low ionic charge, and conductivity <40.0 μS cm-1, such as the lower Amazon River’s right bank tributaries (Tapajos and Xingu) which are influenced by the Central Brazilian Shield, and also the middle/upper Amazon River’s right bank tributaries (Tefé, Coari and Jutaí).

scholarly journals Physical-Chemical Properties of Thermoactivated Defecate for Purification of Acid Waste Waters

2019 ◽  
Vol 9 (2) ◽  
pp. 1184-1186
Keyword(s):  
Heat Treatment ◽  
Physicochemical Properties ◽  
Functional Groups ◽  
Chemical Properties ◽  
Adsorption Properties ◽  
Waste Waters ◽  
Thermally Activated ◽  
Physical Chemical ◽  
Acidic Wastewater ◽  
Acid Waste

In this work, we studied the physicochemical properties of thermally activated defecate at 650°C and studied their neutralizing and adsorption properties in the treatment of acidic wastewater. It was found that after heat treatment at 650°C the main functional groups of the defect, i.e. CaCO3 practical has not changed

scholarly journals Comparative Analysis of Different Combinations of Composting and Testing of Soil Physical Properties

2021 ◽  
Author(s):  
Tej Kumar Nepal ◽  
Ugyen Dorji ◽  
Yeshi Nidup ◽  
Chencho Wangdi ◽  
Kelzang Tshering ◽  
...  
Keyword(s):  
Organic Matter ◽  
Physical Properties ◽  
Biological Properties ◽  
Soil Physical Properties ◽  
The Other ◽  
Cow Dung ◽  
Kitchen Waste ◽  
Physical Chemical ◽  
Aerobic Process ◽  
Potato Peels

During composting process, soils undergo many changes in their physical, chemical and biological properties. Composting has been widely known as an aerobic process during which organic matter is decomposed to humus like substances broken into many organic materials or compounds. The project aims to compare and analyze different combination of composting that yield different properties and nature of soils, and testing their soil physical properties. Dug three compost pits each 1.5 m in depth, labeled compost pit A consisting of potato peels &ndash; the only kitchen waste most common around the college hostels, compost pit B consisting of leaf litter and other garden trimmings and compost pit C consisting of cow dung and the other as a controlled experiment with no composting practices.

scholarly journals Comparing organic versus conventional soil management on soil respiration

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 258 ◽  
Author(s):  
Bence Mátyás ◽  
Maritza Elizabeth Chiluisa Andrade ◽  
Nora Carmen Yandun Chida ◽  
Carina Maribel Taipe Velasco ◽  
Denisse Estefania Gavilanes Morales ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Respiration ◽  
Soil Properties ◽  
Organic Material ◽  
Chemical Properties ◽  
Soil Management ◽  
Co2 Production ◽  
Organic Soils ◽  
Physical Chemical ◽  
Organic Farmers

Soil management has great potential to affect soil respiration. In this study, we investigated the effects of organic versus conventional soil management on soil respiration.  We measured the main soil physical-chemical properties from conventional and organic managed soil in Ecuador. Soil respiration was determined using alkaline absorption according to Witkamp.  Soil properties such as organic matter, nitrogen, and humidity, were comparable between conventional and organic soils in the present study, and in a further analysis there was no statically significant correlation with soil respiration. Therefore, even though organic farmers tend to apply more organic material to their fields, but this did not result in a significantly higher CO2 production in their soils in the present study.

scholarly journals Limnological Features of the Southern Part of Gharaf River and the Impacts of Floodplain Period on its Characteristics

2021 ◽  
pp. 415-430
Author(s):  
Zahraa N. Khalaf ◽  
Muhanned R. Nashaat ◽  
Jameel S. AL-Sariy
Keyword(s):  
River Water ◽  
Chemical Properties ◽  
The Other ◽  
Total Alkalinity ◽  
Clean Water ◽  
Strong Connection ◽  
A Value ◽  
Physical Chemical ◽  
International Water ◽  
The Impact

The current study was conducted on the southern part of Gharaf  River in   order to define the physical-chemical properties and the impact of the Tigris River’s floodplain water on its ecological characteristics during 2019. Four sites were selected along the southern part of the river. The findings showed a strong connection between the temperature of air and water at all sites. A value ranging from 4.85 - 84.65 NTU was reported for turbidity. The water was found to be oligohaline, low alkaline, and well ventilated due to high dissolved oxygen concentrations. Gharaf  River is considered to be of questionable clean water, according to the results of BOD5. The total alkalinity values were recorded to be in the range of 92-292.8 mg /L, which are higher than the acceptable limits of 20-200 mg /L CaCO3 for the Iraqi and international water standards. It was also found that Gharaf  River water was very hard, but still within the allowable natural water limits (200 mg /L Ca and 150 mg /L Mg). Concentrations of sulphate ranged 50-200 mg / L, while levels of bicarbonate ranged 140-230 mg /L. On the other hand, ranges of 3354-855 mg / L and 3-85 mg / L, respectively, were recorded for TDS and TSS. In addition, nitrates values were found to be in the range of 0.04-5.14 mg / L, being below the permissible limits for Iraqi water (15 mg / L). Other values observed for phosphates were 0.004-0.085 mg / L. Overall, the results demonstrated different effects on the properties of Gharaf  River water during and after the floodplain period.

scholarly journals Changes of physical-chemical properties of beef during 14 days of chilling

2012 ◽  
Vol 28 (1) ◽  
pp. 77-85 ◽  
Author(s):  
N. Stanisic ◽  
M. Petricevic ◽  
D. Zivkovic ◽  
M.M. Petrovic ◽  
D. Ostojic-Andric ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Skeletal Muscles ◽  
Chemical Properties ◽  
Gluteus Medius ◽  
Longissimus Dorsi ◽  
Post Mortem ◽  
Physical Chemical

The objective of the work was to evaluate the effect of conditioning time (during 14 days of ageing at +4?C) on physicochemical properties of two cattle skeletal muscles. Investigations were conducted on the m. longissimus dorsi (n=9) and m. gluteus medius (n=9) of Domestic Spotted breed. Muscle analyses were carried out 1st, 7th and 14th day post mortem, during storage at +4?C. Colour (CIE L

scholarly journals Optimum rotation for harvesting of cajuput leave at KPH Yogyakarta

2019 ◽  
Vol 8 (1) ◽  
pp. 71 ◽  
Author(s):  
Budi Mulyana ◽  
Sri Wahyuni Sarah Siallagan ◽  
Teguh Yuwono ◽  
Ris Hadi Purwanto
Keyword(s):  
Physical Properties ◽  
Chemical Properties ◽  
Tree Breeding ◽  
Biological Cycle ◽  
Testing Tools ◽  
Physical Chemical ◽  
Timber Plantations

The productivity of cajuput plantation has improved through tree breeding, while manipulation of site and management engineering of timber plantations have been less attention. Management engineering can be obtained by determining the optimum cycle of cajuput leaves harvesting. This study aims to determine the optimum cycling of cajuput leaves harvesting at KPH Yogyakarta by considering the biological cycles of cajuput leaves, chemical physical properties, and the yield of cajuput oil. The tools used in the research were digital scales, distillation devices, and testing tools of physical-chemical properties of cajuput oil. The material for research was the cajuput plants at KPH Yogyakarta. Data of cajuput leave-twig biomass were obtained for 9 months from 9 plots which were well distributed on various ages. Biological cycle analysis uses curent monthly increment (CMI) and mean monthly increment (MMI) intersection approach. Analysis of the physical-chemical properties on cajuput oil refers to SNI 3954:2014 on cajuput oil. The results showed that the biological cycles of cajuput leaves were obtained 5 months after leaves harvesting. The chemical physical properties of cajuput oil that meet the requirements of SNI were achieved after the leaves are 7 months after harvested. The yield of cajuput oil which is above 0.7% was obtained after the leaves are 8 months after harvested. Thus, the optimum cycle for harvesting of cajuput leaves in KPH Yogyakarta is after 8 months.

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