scholarly journals Effect of Inorganic Salts on Acrylamide Formation in Cereal Matrices

2009 ◽  
Vol 27 (Special Issue 1) ◽  
pp. S425-S428 ◽  
Author(s):  
K. Kukurová ◽  
Z. Ciesarová ◽  
A. Bednáriková ◽  
L. Marková
Keyword(s):  
Potassium Dihydrogen Phosphate ◽  
Inorganic Salts ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Acrylamide Formation ◽  
Potassium Hydrogen ◽  
Hydrogen Carbonates ◽  
The Impact ◽  
Sodium And Potassium ◽  
Sodium Acid Pyrophosphate

The aim of the work was to compare the impact of different salts such as monovalent and divalent chlorides, hydrogencarbonates, phosphates and lactate on acrylamide formation in cereal model system during baking at 190°C for 9 min. Ammonium hydrogencarbonate promoted acrylamide production significantly. On the other hand, other inorganic salts lowered acrylamide content. Calcium chloride was the most effective with near to 90% acrylamide elimination ability. Sodium acid pyrophosphate, sodium as well as potassium dihydrogen phosphate were also very effective and brought about 75% acrylamide content decrease, followed by calcium lactate, sodium chloride and potassium chloride causing 40–45% of acrylamide elimination and finally sodium and potassium hydrogen carbonates that achieved 30% reduction of acrylamide.

Shock wave induced defect engineering on structural and optical properties of pure and dye doped potassium dihydrogen phosphate crystals

2020 ◽  
Vol 235 (6-7) ◽  
pp. 193-202 ◽  
Author(s):  
Sivakumar Aswathappa ◽  
Eniya Palaniyasan ◽  
Sahaya Jude Dhas Sathiyadhas ◽  
Kalyana Sundar Jayaperumal ◽  
Sivaprakash Paramasivam ◽  
...  
Keyword(s):  
Shock Wave ◽  
Optical Properties ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Structural And Optical Properties ◽  
Kdp Crystal ◽  
Potassium Dihydrogen ◽  
Wave Induced ◽  
The Impact ◽  
Kdp Crystals

AbstractBased on the importance of the shock recovery experiments, the authors report the structural and optical properties of pure and 0.001 M dye-doped potassium dihydrogen phosphate (KDP) crystals for virgin and shock wave loaded samples. Rhodamine B and Methylene blue dyes are selected as dopants to be doped with KDP crystal for the present investigation. The test crystals of pure and doped KDP crystals are grown by slow evaporation technique and cut and polished crystals of (200) face are used for the present investigation. Table-top pressure driven shock tube is utilized for the shock wave generation and the used functional Mach number is 1.7. Virgin and shock wave loaded test crystals’ surface morphology, structural properties and optical transmissions are observed using optical microscope, powder X-ray diffractometer and UV-Visible spectrometer, respectively. Crystalline nature and optical transmission of pure and doped KDP crystals are found to have reduced by the impact of shock waves. It occurs due to the enhancement of defect concentration on the surface of the test crystals. From the observed results, we assert that the pure KDP crystal is relatively more stable to shock wave induced damage compared to doped KDP crystals as reflected by structural and optical studies.

MAGIC-LC/FT-IR Spectrometry with Buffered Solvent Systems

1990 ◽  
Vol 44 (1) ◽  
pp. 8-13 ◽  
Author(s):  
R. M. Robertson ◽  
J. A. de Haseth ◽  
R. F. Browner
Keyword(s):  
Mobile Phase ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Reference Spectrum ◽  
Ir Spectrometry ◽  
Potassium Dihydrogen ◽  
Aerosol Generator ◽  
Mobile Phases ◽  
Potassium Hydrogen ◽  
Ft Ir

The first demonstration of identifiable infrared (IR) spectra obtained from buffered (volatile and nonvolatile buffers) mobile phases using the Monodisperse Aerosol Generator Interface for Combining Liquid Chromatography with Fourier Transform Infrared (MAGIC-LC/FT-IR) spectrometry is described. Ammonium acetate, a volatile buffer, was used to buffer an 80:20 acetonitrile: water mobile phase to pH 5.0. Caffeine was deposited from this buffered mobile phase, and the spectrum was used as a reference to compare with caffeine spectra obtained from nonvolatile buffered mobile phases. The two nonvolatile buffers used were potassium hydrogen phthalate (KHP) and potassium dihydrogen phosphate (KH2PO4). The KH2PO4 was used to buffer an acetonitrile:water mobile phase and a methanol:water mobile phase, whereas the KHP buffer was used only in a methanoh:water mobile phase. Samples of caffeine were deposited from each of the above buffer systems along with the nonvolatile buffer. Infrared spectra of caffeine were obtained by spectral subtraction of previously stored buffer spectra from the caffeine:buffer spectra. The resulting spectra were identical to a caffeine reference spectrum.

scholarly journals Optical Absorption Spectra of Vanadyl Ion (Impurities) in Three Host Crystal Compounds

1985 ◽  
Vol 40 (11) ◽  
pp. 1164-1166
Author(s):  
O. P. Agarwal ◽  
Prem Chand
Keyword(s):  
Optical Absorption ◽  
Potassium Dihydrogen Phosphate ◽  
Optical Data ◽  
Dihydrogen Phosphate ◽  
Host Crystal ◽  
Optical Absorption Study ◽  
Potassium Dihydrogen ◽  
Vanadyl Complexes ◽  
Vanadyl Ion ◽  
Magnesium Ammonium

Results of the optical absorption study of vanadyl ion doped in magnesium ammonium sulphate hexahydrate, rubidium sulphate and potassium dihydrogen phosphate single crystals at RT are reported. The nature of optical bands suggests a C4v symmetry of the Vanadyl complexes in conformity with the EPR results. Powder EPR data and optical data are correlated to obtain the MO coefficients.

scholarly journals The Strain Rate Sensitivity and Creep Behavior for the Tripler Plane of Potassium Dihydrogen Phosphate Crystal by Nanoindentation

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 369
Author(s):  
Jianhui Mao ◽  
Wenjun Liu ◽  
Dongfang Li ◽  
Chenkai Zhang ◽  
Yi Ma
Keyword(s):  
Strain Rate ◽  
Strain Rate Sensitivity ◽  
Creep Deformation ◽  
Potassium Dihydrogen Phosphate ◽  
Rate Sensitivity ◽  
Dislocation Nucleation ◽  
Machining Process ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Kdp Crystals

As an excellent multifunctional single crystal, potassium dihydrogen phosphate (KDP) is a well-known, difficult-to-process material for its soft-brittle and deliquescent nature. The surface mechanical properties are critical to the machining process; however, the characteristics of deformation behavior for KDP crystals have not been well studied. In this work, the strain rate effect on hardness was investigated on the mechanically polished tripler plane of a KDP crystal relying on nanoindentation technology. By increasing the strain rate from 0.001 to 0.1 s−1, hardness increased from 1.67 to 2.07 GPa. Hence, the strain rate sensitivity was determined as 0.053, and the activation volume of dislocation nucleation was 169 Å3. Based on the constant load-holding method, creep deformation was studied at various holding depths at room temperature. Under the spherical tip, creep deformation could be greatly enhanced with increasing holding depth, which was mainly due to the enlarged holding strain. Under the self-similar Berkovich indenter, creep strain could be reduced at a deeper location. Such an indentation size effect on creep deformation was firstly reported for KDP crystals. The strain rate sensitivity of the steady-state creep flow was estimated, and the creep mechanism was qualitatively discussed.

Assessment of Structural Stability of Dye-Doped Potassium Dihydrogen Phosphate Under Shocked Conditions

2021 ◽  
Author(s):  
A. Sivakumar ◽  
S. Sahaya Jude Dhas ◽  
P. Sivaprakash ◽  
Abdulrahman I. Almansour ◽  
Raju Suresh Kumar ◽  
...  
Keyword(s):  
Structural Stability ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen
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