scholarly journals The Influence of Maltodextrin on the Thermal Transitions and State Diagrams of Fruit Juice Model Systems

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2077
Author(s):  
Pedro García-Coronado ◽  
Alma Flores-Ramírez ◽  
Alicia Grajales-Lagunes ◽  
Cesar Godínez-Hernández ◽  
Miguel Abud-Archila ◽  
...  
Keyword(s):  
Food Systems ◽  
Fruit Juice ◽  
State Diagram ◽  
Solid Content ◽  
The State ◽  
Model Systems ◽  
Thermal Transitions ◽  
Scanning Calorimetry ◽  
State Diagrams ◽  
Mass Fractions

The state diagram, which is defined as a stability map of different states and phases of a food as a function of the solid content and temperature, is regarded as fundamental approach in the design and optimization of processes or storage procedures of food in the low-, intermediate-, and high-moisture domains. Therefore, in this study, the effects of maltodextrin addition on the freezing points (Tm′, Tm) and glass transition temperatures (Tg′, Tg) required for the construction of state diagrams of fruit juice model systems by using differential scanning calorimetry methods was investigated. A D-optimal experimental design was used to prepare a total of 25 anhydrous model food systems at various dry mass fractions of fructose, glucose, sucrose, pectin, citric acid, and maltodextrin, in which this last component varied between 0 and 0.8. It was found that maltodextrin mass fractions higher than 0.4 are required to induce significant increases of Tg′, Tm′, Tg, and Tm curves. From this perspective, maltodextrin is a good alternative as a cryoprotectant and as a carrier agent in the food industry. Furthermore, solute-composition-based mathematical models were developed to evaluate the influence of the chemical composition on the thermal transitions and to predict the state diagrams of fruit juices at different maltodextrin mass fractions.

Phase State Diagrams of a Four-Component System Al-Si-N-O - Analysis of the Thermodynamic Stability of Sialon Compounds Dased on Energy Crystal-Chemistry

2020 ◽  
Vol 303 ◽  
pp. 97-103
Author(s):  
V.A. Vlasov ◽  
Anatoliy A. Klopotov ◽  
V.I. Vereshchagin ◽  
O.G. Volokitin ◽  
K.A. Bezukhov ◽  
...  
Keyword(s):  
Crystal Chemistry ◽  
Crystalline Structure ◽  
Thermodynamic Stability ◽  
Phase State ◽  
State Diagram ◽  
The State ◽  
Component System ◽  
State Diagrams ◽  
Pearson Symbol

The paper presents the results of the analysis of the state diagram of compounds in the system А12O3-SiO2. It has been found that the presence and the concentration of oxygen have a very important effect on formation of compounds with a crystalline structure in different syngony based on SIALON. Oxygen contributes to transition of the metastable AlXSi3-XN4compound into stable one. The parameter of structural “friability” of compounds has been used in the analysis of thethermodynamic stability of compounds in the Al-Si-N-O system. It has been foundthat the SiAl4O2N4 compound with the 12H-SIALON structure (Pearson symbol hP32) has the greatest thermodynamic stability among the compounds under study in this system.

Influence of the amorphous phase and preceding solution processing on the eutectic behaviour in the state diagram of P3HT : PC61BM determined by rapid heat–cool calorimetry

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 92981-92988 ◽  
Author(s):  
M. Defour ◽  
N. Van den Brande ◽  
L. Van Lokeren ◽  
G. Van Assche ◽  
W. Maes ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Amorphous Phase ◽  
Organic Photovoltaics ◽  
State Diagram ◽  
The State ◽  
Solution Processing ◽  
State Diagrams

Experimental determination of eutectic state diagrams for organic photovoltaics based on advanced calorimetry highlighting the importance of the amorphous phase.

State Diagrams of Two Thai Rice Varieties Differing in Amylose Contents

2016 ◽  
Vol 848 ◽  
pp. 89-94
Author(s):  
Chutamas Boonrod ◽  
Khongsak Srikaeo
Keyword(s):  
Glass Transition ◽  
Freezing Point ◽  
Amylose Content ◽  
State Diagram ◽  
The State ◽  
Published Data ◽  
Rice Varieties ◽  
State Diagrams ◽  
Physicochemical Changes ◽  
Solids Content

State diagram is a map of the different states of a food polymer as a function of water or solids content and temperature. The main advantage of drawing map is in identifying different states of a food polymer which helps in understanding the complex changes when food's water content and temperature are changed. It also assists in identifying food’s stability during storage as well as selecting suitable conditions for processing. This research successfully developed the state diagrams of two Thai rice varieties differing in amylose contents (San-pah-tawng and Phitsanulok 2) by measuring the glass line; glass transition temperature (Tg) vs. solids content, freezing curve; initial freezing point vs. solids content by using the differential scanning calorimetry (DSC) method. Rice with different amylose content exhibited similar freezing curves and glass transition patterns. The state diagrams obtained in this study are in agreement with previously published data. They can be useful in optimizing the drying and freezing processes as well as studying the physicochemical changes during storage of rice.

Experimental data and predictive equation of the specific heat capacity of fruit juice model systems measured with differential scanning calorimetry

2021 ◽  
Author(s):  
María Angélica Sánchez‐Romero ◽  
Pedro García‐Coronado ◽  
Cecilia Rivera‐Bautista ◽  
Raúl González‐García ◽  
Alicia Grajales‐Lagunes ◽  
...  
Keyword(s):  
Experimental Data ◽  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Fruit Juice ◽  
Model Systems ◽  
Predictive Equation ◽  
Scanning Calorimetry

Differentiated Scanning Calorimetry of Model Systems with Cocoa Butter

Food Industry ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 29-36
Author(s):  
Alexander Vereshchagin ◽  
Irina Reznichenko ◽  
Nikolay Bychin
Keyword(s):  
Cocoa Butter ◽  
Palm Olein ◽  
Palm Stearin ◽  
Model Systems ◽  
Scanning Calorimetry ◽  
Glucose Syrup ◽  
Polymorphic Modifications ◽  
Confectionery Products ◽  
System Temperature ◽  
Dsc Method

The article concerns the research specificity of model systems such as cocoa butter – palm olein, cocoa butter – sucrose and cocoa butter – glucose syrup by the differential scanning calorimetry (DSC) method. The researchers run experiments in the temperature range from –100 to –50°C at a heating rate of 10 °C/min. In the cacao butter – palm olein system an eutectic occurs with a palm olein content of 30.0 % indicating the limited solubility of palm olein in cocoa butter. In the cocoa butter – sucrose system, cocoa butter crystallizes as in the α-form (10,0– 30,0; 60.0–90.0 % MK), and as a mixture of α-and β-forms of MK (40.0; 50,0; 70,0 and 80.0 %). Sucrose stabilizes low-temperature polymorphic modifications of cocoa butter. In the cocoa butter – glucose syrup system, temperature of samples melting is 21-22 °C. This composition is promising for use as a filling of confectionery products and glazes production. In this regard, a man can use glucose syrup only in the candy cases production. The role of surfactants used for the formation and stabilization of cocoa butter polymorphs and increasing the thermal stability of the shock-lad without the introduction of palm stearin requires separate consideration.

Construction of the state diagram of polymer blend thin films using differential AC chip calorimetry

Polymer ◽  
2011 ◽  
Vol 52 (19) ◽  
pp. 4277-4283 ◽  
Author(s):  
Nicolaas-Alexander Gotzen ◽  
Guy Van Assche ◽  
Bruno Van Mele
Keyword(s):  
Thin Films ◽  
Polymer Blend ◽  
State Diagram ◽  
The State ◽  
Chip Calorimetry

scholarly journals Rancang Bangun Mesin Pengecat Otomatis Berbasis PLC CP1E NA20DR A

2019 ◽  
Vol 1 (3) ◽  
pp. 118
Author(s):  
Fahmi Abdul Aziz ◽  
Riky Dwi Puriyanto
Keyword(s):  
Flat Surface ◽  
State Diagram ◽  
Dc Motor ◽  
The State ◽  
Ladder Diagram ◽  
Maximum Speed ◽  
Well Testing ◽  
Diagram Method ◽  
Limit Switch

Dalam hal mengecat tidak semua orang dapat melakukan pengecatan dengan sempurna, banyak hasil cat yang tidak merata atau lapisan yang terlalu tebal dan terlalu tipis. Tujuan penelitian ini adalah membuat sebuah alat yang membantu manusia untuk mengecat objek di permukaan datar secara otomatis. Komponen yang digunakan dalam penelitian ini yaitu motor DC PG28, sensor encoder, sensor limit switch dan PLC Omron CP1E-NA20DR-A. Alat ini bergerak berdasarkan sumbu x dan y yaitu bergerak ke atas-bawah dan ke kanan-kiri, kemudian untuk pengecatanya menggunakan roll cat. Setiap pergerakan alat di program menggunakan ladder diagram di software CX-Programmer. Untuk memonitor pergerakan mesin peneliti membuat HMI dari software CX-Designer. Pada pembuatan program ladder diagram peneliti menggunakan metode state diagram karena metode ini dapat menyusun program ladder dengan baik. Pengujian pembacaan RPM motor peneliti membandingkan data dari PLC dengan tachometer dan didapat error sebesar 0,52%. Pergerakan alat pada sumbu x didapat dengan mengendalikan pulsa putaran per rotasi yang terbaca 1380 pulsa per 10 cm oleh sensor encoder. Jarak 10 cm mengacu pada lebar dari roll cat yang dipakai. Kemudian dengan tegangan luar sebesar 12V didapat kecepatan maksimun pada motor DCPG28 sebesar 379 RPM.In the case of painting not everyone can paint perfectly, many paints are not evenly distributed or layers that are too thick and too thin. The purpose of this research is to create a tool that helps humans to paint objects on a flat surface automatically. The components used in this study are the PG28 DC motor, encoder sensor, limit switch sensor and PLC Omron CP1E-NA20DR-A. This tool moves based on the x and y axis that is moving up-down and right-left, then for painting using a paint roll. Every movement of tools in the program uses ladder diagrams in the CX-Programmer software. To monitor the movement of the engine the researcher made an HMI from the CX-Designer software. In making ladder diagram programs researchers use the state diagram method because this method can arrange ladder programs well. Testing the RPM reads the motorbike comparing the data from the PLC with the tachometer and obtained an error of 0.52%. The movement of the tool on the x-axis is obtained by controlling the rotational pulses per rotation which reads 1380 pulses per 10 cm by the encoder sensor. A distance of 10 cm refers to the width of the paint roll used. Then with an outside voltage of 12V, the maximum speed of the DCPG28 motor is 379 RPM.

scholarly journals Preparation and Characterization of Polymer Composite Materials Based on PLA/TiO2 for Antibacterial Packaging

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1365 ◽  
Author(s):  
Edwin A. Segura González ◽  
Dania Olmos ◽  
Miguel Ángel Lorente ◽  
Itziar Vélaz ◽  
Javier González-Benito
Keyword(s):  
Composite Materials ◽  
Tio2 Nanoparticles ◽  
Polymer Composite ◽  
Bacterial Growth ◽  
Thermal Characterization ◽  
Polymer Composite Materials ◽  
Thermal Transitions ◽  
Scanning Calorimetry ◽  
Particle Content ◽  
Fourier Transformed Infrared Spectroscopy

Polymer composite materials based on polylactic acid (PLA) filled with titanium dioxide (TiO2) nanoparticles were prepared. The aim of this work was to investigate the antibacterial action of TiO2 against a strain of E. Coli (DH5α) to obtain information on their potential uses in food and agro-alimentary industry. PLA/TiO2 systems were prepared by a two-step process: Solvent casting followed by a hot-pressing step. Characterization was done as a function of particle size (21 nm and < 100 nm) and particle content (0%, 1%, 5%, 10%, and 20%, wt %). Structural characterization carried out by X-ray diffraction (XRD) and Fourier Transformed Infrared spectroscopy (FTIR) did not reveal significant changes in polymer structure due to the presence of TiO2 nanoparticles. Thermal characterization indicated that thermal transitions, measured by differential scanning calorimetry (DSC), did not vary, irrespective of size or content, whereas thermogravimetric analysis (TGA) revealed a slight increase in the temperature of degradation with particle content. Bacterial growth and biofilm formation on the surface of the composites against DH5α Escherichia Coli was studied. Results suggested that the presence of TiO2 nanoparticles decreases the amount of extracellular polymeric substance (EPS) and limits bacterial growth. The inhibition distances estimated with the Kirby-Bauer were doubled when 1% TiO2 nanoparticles were introduced in PLA, though no significant differences were obtained for higher contents in TiO2 NPs.

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