scholarly journals Effect of Temperature on the Combustion of Kepok Banana (Musa Paradisiaca Linn cv. 'Saba') Peel as Potassium Source

2018 ◽  
Vol 1 (1) ◽  
pp. 060-066
Author(s):  
Bambang Trisakti ◽  
Dasa Haryuwibawa ◽  
Joko Mulya Pratama ◽  
Irvan Irvan
Keyword(s):  
Combustion Temperature ◽  
Pure Water ◽  
Potassium Content ◽  
Effect Of Temperature ◽  
Banana Peel ◽  
Combustion Time ◽  
Muffle Furnace ◽  
Soaking Time ◽  
Musa Paradisiaca ◽  
Water Ratio

The aims of this study is to determine the optimum combustion temperature of kepok banana (Musa Paradisiaca Linn cv. 'Saba') peel as a potassium source. Experiment was started by combustion kepok banana peel to ashes. Combustion was carried out by inserting 15 g of kepok banana peel into a muffle furnace at temperatures of 450, 500, 550 and 600oC for 3 and 5 hours. The content of potassium in the ash was extracted with pure water which ash-water ratio was 1:100 and the soaking time was 24 hours. Furthermore, analysis of the extract was carried based on various parameter such as normality, pH, electrical conductivity, and potassium content (as K2O). The best of potassium content obtained from ashes produced by combustion of kepok banana peel was 61.80% at temperatures of 550oC for 5 hours of combustion time.

scholarly journals Effect of temperature and soaking time on the synthesis of Mo(Al,Si)2

2001 ◽  
Vol 27 (7) ◽  
pp. 829-831 ◽  
Author(s):  
Anup K. Bhattacharya ◽  
Sheela K. Ramasesha
Keyword(s):  
Effect Of Temperature ◽  
Soaking Time

scholarly journals Protein Denaturation Zero Entropy Temperature, and the Structure of Water Around Hydrophobic and Amphiphilic Solutes

2020 ◽  
Author(s):  
kazimieras Tamoliūnas ◽  
Nuno Galamba
Keyword(s):  
Protein Denaturation ◽  
Structural Information ◽  
Pure Water ◽  
Hydrophobic Effect ◽  
Hydrophobic Hydration ◽  
Bulk Water ◽  
Solvent Accessible Surface Area ◽  
Effect Of Temperature ◽  
Structure Of Water ◽  
Zero Entropy

The hydrophobic effect plays a key role in many chemical and biological processes, including protein folding. Nonetheless, a comprehensive picture of the effect of temperature on hydrophobic hydration and protein denaturation remains elusive. Here, we study the effect of temperature on the hydration of model hydrophobic and amphiphilic solutes through molecular dynamics aiming at getting in sight on the singular behavior of water concerning the zero entropy temperature TS and entropic convergence also observed upon protein denaturation. We show that, similar to hydrocarbons and proteins, polar amphiphilic solutes exhibit a TS, although strongly dependent upon solute-water interactions, opposite to hydrocarbons. Further, the temperature dependence of the hydration entropy normalized by the solvent accessible surface area is shown to be nearly solute size independent for hydrophobic but not for amphiphilic solutes, for similar reasons. These results are further discussed in the light of information theory (IT) and the structure of water around hydrophobic groups The latter shows that the tetrahedral enhancement of some water molecules around hydrophobic groups, associated with the reduction of water defects, leads to the strengthening of the weakest hydrogen bonds, relative to bulk water. However, a larger tetrahedrality is found in low density water populations, demonstrating that pure water has encoded structural information similar to that associated with hydrophobic hydration, consistent with IT assumptions. The source of the differences between Kauzmann's "hydrocarbon model" on protein denaturation and hydrophobic hydration is also discussed with relatively large amphiphilic hydrocarbons displaying a more similar behavior to globular proteins, than aliphatic hydrocarbons.<br>

scholarly journals PEMANFAATAN LIMBAH KULIT BUAH PISANG KEPOK (Musa paradisiaca) SEBAGAI BIOSORBEN ZAT WARNA RHODAMIN B

KOVALEN ◽  
2019 ◽  
Vol 5 (3) ◽  
pp. 308-314
Author(s):  
Musafira Musafira ◽  
Nurfitrah M Adam ◽  
Dwi Juli Puspitasari
Keyword(s):  
Adsorption Capacity ◽  
Rhodamine B ◽  
Contact Time ◽  
Banana Peel ◽  
Musa Paradisiaca ◽  
Randomized Design ◽  
Rhodamine B Dye ◽  
Completely Randomized Design ◽  
Maximum Contact ◽  
Rhodamin B

The investigation about the utilization of Banana peel (Musa paradisiaca) as biosorbent Rhodamine B dye has been done The purpose of this study was to determine the maximum contact time and to determine the adsorption capacity of kepok banana peel. Completely randomized design (CRD) was used in this research with two variables (the contact time and Rhodamine B concentration. Both variables were done in five levels i.e 10, 30, 60, 90, and 120 min and 2, 4, 6, 8 and 10 ppm respectively. The result showed that the maximum concentration of banana peel in adsorbing Rhodamine B was 6 ppm with 120 of contact time, and Rhodamine B adsorption capacity was  4.55mg/g. Keywords: Banana peel, Rhodamine B, biosorbent

scholarly journals Effect of molten salt properties on internal flow and disk friction loss of molten salt pump

2020 ◽  
Vol 24 (4) ◽  
pp. 2347-2356
Author(s):  
Yong-Xin Jin ◽  
De-Sheng Zhang ◽  
Xi Sheng ◽  
Lei Shi ◽  
Wei-Dong Shi ◽  
...  
Keyword(s):  
Shear Stress ◽  
Molten Salt ◽  
Pure Water ◽  
Friction Loss ◽  
Effect Of Temperature ◽  
Fluid Viscosity ◽  
Fluid Density ◽  
Working Fluids ◽  
Pump Performance ◽  
Disk Friction

Computational fluid dynamics is used to study the effect of temperature on flow structure and disk friction loss for different working fluids in a high temperature molten salt pump, which is used for concentrating solar power, the velocity profile and pressure distribution in the first stage of the pump model and the effect of the fluid property on the ring leakage, disk friction loss as well as the shear stress distribution on shroud are analyzed for the pure water and the molten salt with temperature 300?C and 565?C respectively. The main findings can be concluded as: the working fluids have little effect on pump performance and internal velocity distribution whereas the pressure of the flow field would increase with the fluid density, with the increase of the fluid viscosity, the shear stress inside the ring also increases and the total leakage can be eliminated evidently, the increase of the fluid density and viscosity show the significant responsibility for the disk friction loss, in which the fluid viscosity also increases the disk friction loss, and the viscosity is one of the most influential factors for the shroud shear stress and it can be observed that the shear stress on front shroud is higher than that on the rear shroud. It is believed that the present work can deep the understandings of the fluid structures inside the molten salt pump, which can provide some guidelines to improve the pump performance and optimize the pump structure.

scholarly journals Impact of Heat on the Different Stages of the Production of Local Beer “Tchoukoutou” Made from Sorghum

2021 ◽  
Vol 37 (6) ◽  
pp. 1359-1365
Author(s):  
Adjo Cynthia Kouakou ◽  
Agbékonyi Kokou Agbodan ◽  
Kwami Lumo Awaga ◽  
Awèdéou Bakpo ◽  
Eyawèdeou Yelegue ◽  
...  
Keyword(s):  
Germination Rate ◽  
Effect Of Temperature ◽  
Soaking Time ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Temperature Ranges ◽  
The Subject ◽  
Temperature Levels ◽  
C 30

Tchoukoutou is a local alcoholic drink made from sorghum. The optimization and good quality of this drink depend on certain factors such as temperature that were the subject of our work. To carry out this study, we have set ourselves the general objective of structuring the production of Tchoukoutou. Specifically, the study aims to systematize the cooking of the wort, to verify the properties of the beer through tests and to produce a quality drink. An investigation was made on the influence of temperature on sorghum germination and wort cooking. The study of the effect of temperature on the germination of sorghum was carried out. It concerned four different temperature levels which are: 23 ° C, 26 ° C, 30 ° C and 35 ° C. A study of the influence of temperature on brewing was done with different varieties of sorghum and also at different temperature ranges: 78 ° C, 83 ° C, 89 ° C, and 92 ° C. The results showed that the ideal germination temperature is 30 ° C and for brewing it is 78 ° C. The soaking time during germination, for a good germination rate, is between 16h and 26h. In conclusion, the temperature factor is a parameter that should not be overlooked when making Tchoukoutou. Our study thus made will serve as a basis for subsequent studies in the same direction to achieve a standardized industrial production of Tchoukoutou.

scholarly journals TO STUDY MECHANICAL PROPERTIES OF SPRING LIKE SPECIMEN BEFORE AND AFTER DIFFERENT HEAT TREATMENT OPERATIONS

2020 ◽  
Vol 6 (6) ◽  
pp. 1-8
Author(s):  
Amit Kumar
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Temperature ◽  
Muffle Furnace ◽  
Soaking Time ◽  
Standard Data ◽  
Treatment Processes ◽  
Specimen Material ◽  
Material Specimen ◽  
Before And After

In this work we have analyzed the effect heat treatment on properties of spring shape steel specimens under various heat treatment processes. Specimen was subjected to heat treatment in electric muffle furnace. Heat treatment temperature, soaking time and cooling rate were selected as per phase diagram of specimen material. Specimen was tested for mechanical properties before and after heat treatment. Two processes annealing and normalizing compared with respect to their effect on properties of spring shape specimens in reference with standard data for steel used.

scholarly journals Temperature monitoring through nanoparticle-activated proton relaxation for magnetic resonance imaging application

2021 ◽  
Vol 2058 (1) ◽  
pp. 012036
Author(s):  
A D Mironova ◽  
Yu V Kargina ◽  
A M Perepukhov ◽  
O S Pavlova ◽  
M V Gulyaev ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Pure Water ◽  
Relaxation Times ◽  
Effect Of Temperature ◽  
Proton Relaxation ◽  
Resonance Imaging ◽  
Pure Silicon ◽  
Imaging Application ◽  
Magnetic Resonance Imaging Mri

Abstract An effect of temperature on the proton relaxation times in aqueous suspensions of solid-state nanoparticles (NPs) is comparatively investigated for the NPs’ composition varied from pure silicon (Si) with natural isotope content to Si with iron impurities as well as for Si NPs enriched with Si-29 isotope. For all types of the investigated NPs both the longitudinal and transverse relaxation times become shorter compared with that for pure water because of the interaction of electron spin centers in those NPs with nuclear spins of the protons in water molecules. The obtained results allow us to evaluate the temperature sensitivity of NP-based systems for their biomedical applications in magnetic resonance imaging (MRI).

scholarly journals PENETAPAN KADAR VITAMIN C PADA KULIT PISANG (Musa paradisiaca) DENGAN METODE SPEKTROFOTOMETRI UV-VISIBLE TAHUN 2018

2020 ◽  
Vol 2 (2) ◽  
pp. 56-62
Author(s):  
Asti Pratiwi ◽  
Ardita Febrianty Manurung ◽  
Jhoti Sumitra
Keyword(s):  
Vitamin C ◽  
The Body ◽  
Water Soluble ◽  
Banana Peel ◽  
Research Use ◽  
Musa Paradisiaca ◽  
Qualitative Test ◽  
Uv Visible ◽  
Research Stage

Background: Vitamin C is a vitamin that is water soluble qnd one vitamin that are needed by the body. To meet the intake of vitamin C needed source of vitamin a derived from fruits, one of which is banana. Part of the banana , which is still rarely used is its skin. Banana peel is very beneficial for health however the situation is only considered as waste that has not been utilized well. This study aims to determine the levels of vitamin C on the skin of the banana (Musa paradisiaca) by the method of spectrofotometry uv-visible wavelength 224,5 nm. Method: This research use experimental with purely research stage comprise sample preparation, qualitative test, making the solution of the parent raw, quantitative test, determination of wavelength of maximum vitamin and creation of calibration surve. Result: Based on the research that has been done obtained the result of the qualitative test to prove the presence of high content of vitamin C contained in banana peels, with the highest level obtained in the skin of the plantain by 0,0253 mg/ml and the levels of the lowest on a banana peel the wax by 0,0172 ng/ml. Discussion: Levels of vitamin C on the skin of the banana  barangan of 0, 0219 mg/ml, sample a banana skin banten by 0, 0173 mg/ml, sample a banana peel wax by 0, 0172 mg/ml and sample the skin of plantain by 0, 0253 mg/ml.

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