scholarly journals Compression Molded Soy Protein Films with Exopolysaccharides Produced by Cider Lactic Acid Bacteria

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2106
Author(s):  
Jone Uranga ◽  
Mª Goretti Llamas ◽  
Ziortza Agirrezabala ◽  
María Teresa Dueñas ◽  
Oier Etxebeste ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Soy Protein ◽  
Fungal Spores ◽  
Soy Protein Isolate ◽  
Degradation Process ◽  
Inhibitory Effect ◽  
Protein Isolate ◽  
Fungistatic Activity ◽  
Vis Spectroscopy

Two exopolysaccharide (EPS)-producing lactic acid bacteria (LAB) strains, Liquorilactobacillus (L.) sp CUPV281 and Liquorilactobacillus (L.) mali CUPV271, were isolated from Spanish apple must. Each of the strains produced a dextran, with different branching degrees, to be incorporated into soy protein isolate (SPI) film-forming formulations. Films were prepared by compression molding, a more rapid processing method than solution casting and, thus, with a greater potential for scaling-up production. Thermal analysis showed that SPI and EPS start the degradation process at temperatures above 190 °C, confirming that the compression temperature selected (120 °C) was well below the corresponding degradation temperatures. Resulting films were transparent and homogeneous, as shown by UV-Vis spectroscopy and SEM, indicating the good compatibility between SPI and EPS. Furthermore, FTIR analysis showed that the interactions between SPI and EPS were physical interactions, probably by hydrogen bonding among the polar groups of SPI and EPS. Regarding antifungal/fungistatic activity, LAB strains used in this study showed an inhibitory effect on germination of fungal spores.

scholarly journals Detection of Genistein in Soy Protein Isolate and Soymilk Powder by Spectrophotometric and Chromatographic Method

2019 ◽  
Vol 11 ◽  
pp. 69-73
Author(s):  
Md. Anisur Rahman Mazumder ◽  
Parichat Hongsprabhas
Keyword(s):  
Soy Protein ◽  
Cultured Cells ◽  
Soy Protein Isolate ◽  
Milk Powder ◽  
Density Lipoprotein ◽  
Inhibitory Effect ◽  
Protein Isolate ◽  
Hplc Method ◽  
Spectrophotometric Methods

Genistein proposed as a treatment for osteoporosis for postmenopausal women, elderly men, lowering cardiovascular disease and reduces hormone dependent cancers. Genistein also exerted inhibitory effect on lipid peroxidation induced in vitro by pro-oxidant agents on model and natural membranes on cultured cells and on low density lipoprotein. Genistein detection in soy products is very much important for Food Scientist. Gensitein can be detected by UV-Visible spectrophotometric and HPLC method. This study focused on the detection of genistein by HPLC and spectrophotometric methods. Genistein content of both soy protein isolate (SPI) and spray dried soy milk powder (SMP) was determined by spectrophotometry (93.12±1.15 and 74.78±0.75 mg/100g, respectively) were slightly higher but not significantly differ than HPLC analysis (89.67±5.16 and 72.34±0.27 mg/100g, respectively). This study suggested that genistein and its glycoside could be detected by spectrophotometric methods with high accuracy.

scholarly journals The Inhibitory Effect of Soy Protein Isolate on Atherosclerosis in Mice Does Not Require the Presence of LDL Receptors or Alteration of Plasma Lipoproteins

2002 ◽  
Vol 132 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Michael R. Adams ◽  
Deborah L. Golden ◽  
Mary S. Anthony ◽  
Thomas C. Register ◽  
J. Koudy Williams
Keyword(s):  
Soy Protein ◽  
Soy Protein Isolate ◽  
Inhibitory Effect ◽  
Protein Isolate ◽  
Plasma Lipoproteins ◽  
Ldl Receptors

Properties and morphology of poly(lactic acid)/soy protein isolate blends

2009 ◽  
Vol 114 (2) ◽  
pp. 754-759 ◽  
Author(s):  
Kun Fang ◽  
Biaobing Wang ◽  
Kuichuan Sheng ◽  
Xiuzhi Susan Sun
Keyword(s):  
Lactic Acid ◽  
Soy Protein ◽  
Soy Protein Isolate ◽  
Protein Isolate ◽  
Poly Lactic Acid

Aligned soy protein isolate-modified poly(L-lactic acid) nanofibrous conduits enhanced peripheral nerve regeneration

2020 ◽  
Vol 17 (3) ◽  
pp. 036003
Author(s):  
Qiang Zhang ◽  
Zan Tong ◽  
Feixiang Chen ◽  
Xiaomei Wang ◽  
Mingxin Ren ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Peripheral Nerve ◽  
Nerve Regeneration ◽  
Soy Protein ◽  
Peripheral Nerve Regeneration ◽  
Soy Protein Isolate ◽  
Protein Isolate

Antimicrobial Activity of Soy Protein Isolate-Essential Oil Monomers Edible Composite Films for Chilled Pork Preservation

2013 ◽  
Vol 726-731 ◽  
pp. 638-641
Author(s):  
Yun Bin Zhang ◽  
Jing Wen Wang ◽  
Juan Jiang ◽  
Yue Xia Li
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oil ◽  
Soy Protein ◽  
Soy Protein Isolate ◽  
Composite Films ◽  
Inhibitory Effect ◽  
Edible Films ◽  
Protein Isolate ◽  
Meat Samples ◽  
Chilled Pork

Soy protein isolate (SPI)-essential oil monomers edible composite films were prepared by casting and solvent evaporation method. Films antibacterial activity and preservation effect on chilled pork were investigated. The results indicated that composite films showed significant inhibitory effect on the growth ofEscherichia coli,Staphylococcus aureus,Pseudomonasandyeast. And the antimicrobial activity of films containing cinnamaldehyde was the highest. The films containing 6% essential oil monomers had better preservation effect on the meat samples compared with those without package or packed with single SPI edible films.

Soy protein isolate/poly(lactic acid) injection-molded biodegradable blends for slow release of fertilizers

2012 ◽  
Vol 36 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Luciane Calabria ◽  
Nathália Vieceli ◽  
Otávio Bianchi ◽  
Ricardo Vinicius Boff de Oliveira ◽  
Iraja do Nascimento Filho ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Soy Protein ◽  
Slow Release ◽  
Soy Protein Isolate ◽  
Protein Isolate ◽  
Poly Lactic Acid ◽  
Acid Injection ◽  
Injection Molded ◽  
Biodegradable Blends

scholarly journals Characterization of Bio-Inspired Electro-Conductive Soy Protein Films

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 416
Author(s):  
Pedro Guerrero ◽  
Tania Garrido ◽  
Itxaso Garcia-Orue ◽  
Edorta Santos-Vizcaino ◽  
Manoli Igartua ◽  
...  
Keyword(s):  
Soy Protein ◽  
Soy Protein Isolate ◽  
Fluorescence Emission ◽  
Value Added ◽  
Biological Evaluation ◽  
Protein Isolate ◽  
Natural Polymers ◽  
Transparent Films ◽  
Cytotoxicity Studies ◽  
Vis Spectroscopy

Protein-based conductive materials are gaining attention as alternative components of electronic devices for value-added applications. In this regard, soy protein isolate (SPI) was processed by extrusion in order to obtain SPI pellets, subsequently molded into SPI films by hot pressing, resulting in homogeneous and transparent films, as shown by scanning electron microscopy and UV-vis spectroscopy analyses, respectively. During processing, SPI denatured and refolded through intermolecular interactions with glycerol, causing a major exposition of tryptophan residues and fluorescence emission, affecting charge distribution and electron transport properties. Regarding electrical conductivity, the value found (9.889 × 10−4 S/m) is characteristic of electrical semiconductors, such as silicon, and higher than that found for other natural polymers. Additionally, the behavior of the films in contact with water was analyzed, indicating a controlled swelling and a hydrolytic surface, which is of great relevance for cell adhesion and spreading. In fact, cytotoxicity studies showed that the developed SPI films were biocompatible, according to the guidelines for the biological evaluation of medical devices. Therefore, these SPI films are uniquely suited as bioelectronics because they conduct both ionic and electronic currents, which is not accessible for the traditional metallic conductors.

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