Analysis of the Vacuum-Steam Defrosting Process of Plums Pre-Treated with Dehydrofreezing

Ameer Al-Ahmadi

doi:10.1515/agriceng-2020-0010

Details

Publication Date

Sun Mar 01 2020

Journal Name

Agricultural Engineering

Volume

24

DOI

10.1515/agriceng-2020-0010

Choose Citation Style

Statistics

View publication

15

View original publication

1

Statistics

(1)

Analysis of the Vacuum-Steam Defrosting Process of Plums Pre-Treated with Dehydrofreezing

Ameer Al-Ahmadi

...Show More Authors

AbstractThe research material was prune plums (<italic>Prunus domestica</italic> L.), subjected to osmotic pre-treatment, with variable process time parameters and osmotic solution concentration. Plums thus fixed were frozen and stored for 6 months. At even (monthly) intervals, the product was defrosted by the vacuum-steam method, using the s-p-p chamber, until the thermocouple indicated a temperature of 4ºC in the sample’s thermal center. In order to study the kinetics of phenomena occurring during the defrosting process, the chamber was equipped with a measuring system to enable measurement and recording of temperature changes in time in the geometric center of the sample, as well as the temperature on the sample surface. The conducted tests proved that the time of vacuum-steam defrosting of fruit depended on the amount of water contained in it. In plums dehydrated in 45-65% sucrose solutions, duration of the defrosting process was shortened already after three months of frozen storage. After 6 months of storage, defrosting of these fruits was twice as fast as that of control samples.

View Publication

Publication Date

Tue Dec 09 2025

Journal Name

Journal Of Computer-aided Molecular Design

Synthesis, characterization and density functional theory of a novel dichloro(2-(1-anthracene-9-ylmethyl)-1H-1,2,3-triazole-5-yl) pyridine)Cu(II) and polymeric dichloro(2-(1-anthracene-9-ylmethyl)-1H-1,2,3 -triazole-5-yl)pyridine) Cd(II) complexes

K. M.

Ahmed A.

S. J.

C.

J. H.

G. J.

Rasha Ahmed

Aly

Musa E. Mohamed

O. A.

Ali Y.

Ahmed A.

Sameera N.

Antar A.

...Show More Authors

View Publication

(1)

Publication Date

Thu Jan 01 2026

Journal Name

Chalcogenide Letters

Structural and Optical Properties of Cu2ZnSn(S1−xSex)4 Nanostructures Thin Film for Photovoltaic Applications

Cu2 ZnSn(S1−x Se x)4 thin film

energy gap

dielectric constant

extinction coefficient

refractive index

Bushra A.

Ameer J.

Ahmad A.

Yasser A.

...Show More Authors

Copper zinc tin sulfide selenide, Cu2 ZnSn(S1−x Se x)4 , absorbers are promising earth-abundant and environmentally benign materials for low-cost photovoltaic applications. This study investigates the structural and optical properties of Cu 2 ZnSn(S1−x Se x)4 nanostructured thin films prepared by pulsed laser deposition using melt-quenched targets with selenium compositions x = 0.0–1.0. X-ray diffraction revealed that films with low selenium content remained amorphous, whereas higher selenium incorporation promoted the formation of polycrystalline kesterite–stannite phases with preferred orientations along (112), (200), (220), and (312). The crystallite size increased from 12.3 to 17.9 nm as selenium reached x = 1.0, indicating enha

View Publication

(1)

1 2 3 4 ... 2778 2779 2780 2781