Effect of zinc substitution in magnetite structure on heat efficiency for hyperthermia: Investigation in superparamagnetic properties

2022 ◽  
Author(s):  
Hussein. S.Mahmood ◽  
Tahseen. H. Mubarak ◽  
Sabah M. Ali Ridha ◽  
Jasim. Al-Zanganawee
Keyword(s):  
Heat Efficiency ◽  
Superparamagnetic Properties

Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixture

2012 ◽  
Vol 33 (2) ◽  
pp. 231-242 ◽  
Author(s):  
Marek Juszczak ◽  
Katarzyna Lossy
Keyword(s):  
Carbon Monoxide ◽  
Pollutant Emission ◽  
Heat Output ◽  
Wood Pellets ◽  
Wood Pellet ◽  
Carbon Monoxide Concentration ◽  
Heat Efficiency ◽  
Air Stream ◽  
Fuel Mixtures ◽  
Lower Carbon

Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixtureTests for combustion of hay and sunflower husk pellets mixed with wood pellets were performed in a horizontal-feed as well as under-feed (retort) wood pellet furnace installed in boilers with a nominal heat output of 15 and 20 kW, located in a heat station. During the combustion a slagging phenomenon was observed in the furnaces. In order to lower the temperature in the furnace, fuel feeding rate was reduced with unaltered air stream rate. The higher the proportion of wood pellets in the mixture the lower carbon monoxide concentration. The following results of carbon monoxide concentration (in mg/m3presented for 10% O2content in flue gas) for different furnaces and fuel mixtures (proportion in wt%) were obtained: horizontal-feed furnace supplied with hay/wood: 0/100 - 326; 30/70 - 157; 50/50 - 301; 100/0 - 3300; horizontal-feed furnace supplied with sunflower husk/wood: 50/50 - 1062; 67/33 - 1721; 100/0 - 3775; under-feed (retort) furnace supplied with hay/wood: 0/100 - 90; 15/85 - 157; 30/70 - 135; 50/50 - 5179; under-feed furnace supplied with sunflower husk/wood: 67/33 - 2498; 100/0 - 3128. Boiler heat output and heat efficiency was low: 7 to 13 kW and about 55%, respectively, for the boiler with horizontal-feed furnace and 9 to 14 kW and 64%, respectively, for the boiler with under-feed furnace.

Bovine Serum Albumin Conjugation in Superparamagnetic/Poly(methyl methacrylate) Nanoparticles as an Alternative for Magnetic Enzyme-Linked Immunosorbent Assays

2021 ◽  
Vol 21 (11) ◽  
pp. 5493-5498
Author(s):  
Paulo Emilio Feuser ◽  
Camila Guindani ◽  
Jonathann Correa Possato ◽  
Jaqueline Pereira Guessi ◽  
Arthur Poester Cordeiro ◽  
...  
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Methyl Methacrylate ◽  
Bovine Serum ◽  
Protein Quantification ◽  
Elisa Assay ◽  
Poly Methyl Methacrylate ◽  
Transmission Electron ◽  
Superparamagnetic Properties ◽  
Significant Attention

Nanomaterials, such as magnetic nanoparticles have attracted significant attention of medical area due to their capacity to improve the performance of immunoassays. Therefore the aim of this work was to study the bovine serum albumin (BSA) conjugation in superparamagnetic (MNPs)/poly(methyl methacrylate) (PMMA) nanoparticles with further characterization and application in enzyme-linked immunosorbent (ELISA) assay. The successful conjugation of BSA in MNPs- PMMA nanoparticles was confirmed by several techniques, including light scattering, zeta potential, transmission electron microscopy (TEM) and Lowry protein quantification assay. The superparamagnetic properties were confirmed by vibrating sample magnetometer. BSA conjugated MNPs-PMMA nanoparticles presented higher interactions with antibody than free BSA. The BSA + MNPs-PMMA nanoparticles (magnetic ELISA assay) reduced the time and increased the sensibility of traditional ELISA assay, reinforcing the idea that the use these nanomaterials are an excellent alternative for the immunoassays field.

scholarly journals Energy Efficient Dryer with Rice Husk Fuel for Agriculture Drying

2015 ◽  
Vol 4 (1) ◽  
pp. 20-24 ◽  
Author(s):  
M. Djaeni ◽  
N. Asiah ◽  
S Suherman ◽  
A. Sutanto ◽  
A. Nurhasanah
Keyword(s):  
Rice Husk ◽  
Energy Efficient ◽  
Pilot Scale ◽  
Drying Process ◽  
Energy Usage ◽  
Drying Time ◽  
Heat Efficiency ◽  
Operational Temperature ◽  
Time And Energy ◽  
Fossil Fuel Energy

Energy usage is crucial aspect on agriculture drying process. This step spends about 70% of total energy in post harvest treatment. The design of efficient dryer with renewable energy source is urgently required due to the limitation of fossil fuel energy. This work discusses the performance of air dehumidification using rice husk fuel as heat source for onion, and paddy drying. Unlike conventional dryer, the humidity of air during the drying was dehumidified by adsorbent. Hence, the driving force of drying can be  kept high.  As consequences, the drying time and energy usage can be reduced. Here, the research was conducted in two step: laboratory and pilot scale tests. Results showed that the lowering air humidity with rice husk fuel has improved the energy efficiency. At operational temperature 60oC, the heat efficiency of 75%  was achieved. 

Theoretical Calculation and Experimental Study on the Forming Heat of Cement Clinker Made from Steel Slag

2015 ◽  
Vol 814 ◽  
pp. 564-568 ◽  
Author(s):  
Ya Li Wang ◽  
Su Ping Cui ◽  
Gui Ping Tian ◽  
Ming Zhang Lan ◽  
Zhi Hong Wang
Keyword(s):  
Empirical Equation ◽  
Raw Materials ◽  
Steel Slag ◽  
Great Influence ◽  
Cement Clinker ◽  
Chemical Components ◽  
Forming Process ◽  
Acid Dissolution ◽  
Heat Efficiency ◽  
Heat Calculation

When steel slag, a by-product of steel making in impurity catching process, is added, the forming process of cement clinker and the major reactions in that process are changed. Since there are dramatic differences between the chemical components and mineral compositions of steel slag and that of natural cement raw materials, the empirical equation for the calculating forming heats of cement clinker made of limestone and clay is no longer applied for those made of steel slag. In this paper, the empirical equation for forming heat calculation of steel slag added cement clinker was promoted, and testified by acid dissolution experiments. Results showed that the change of raw materials had great influence on the forming heat of cement clinker. When the traditional raw materials were replaced with steel slag, the forming heat of cement clinker reduced. Calculating the forming heat by our revised empirical equation can help reduce errors and bring great convenience for the calculation and evaluation of heat efficiency. This research provides theoretical underpinning for the study and calculation of forming heat of steel slag added cement clinker.

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