Viscosity changes and gel formation during storage of liquid micellar casein concentrates

2021 ◽  
Author(s):  
Marshall Dunn ◽  
David M. Barbano ◽  
MaryAnne Drake
Keyword(s):  
Gel Formation ◽  
Micellar Casein ◽  
Viscosity Changes

Effect of dairy powder rehydration state on gel formation during yogurt process

2012 ◽  
Vol 79 (3) ◽  
pp. 280-286 ◽  
Author(s):  
Marie Celeste Karam ◽  
Claire Gaiani ◽  
Reine Barbar ◽  
Chadi Hosri ◽  
Joel Scher
Keyword(s):  
Storage Modulus ◽  
Milk Powder ◽  
Skim Milk ◽  
Skim Milk Powder ◽  
Gel Point ◽  
Gel Formation ◽  
Micellar Casein ◽  
First Time ◽  
Rehydration Process

Protein fortification and solubilisation into the milk base are important parameters enhancing yogurt texture. In this study, the milk base prepared from reconstituted skim milk powder was fortified with 2% of ‘aged’ (1 year old) or ‘fresh’ micellar casein (MC) powder. Micellar casein powders were left to rehydrate at 20°C for different times (5 or 180, 300, 480, 900 or 1440 min) before acidification with glucono-delta-lactone. The rehydration of the MC powders into milk was monitored with a granulo-morphometer equipment, thus, for the first time, allowing the elucidation of MC rehydration process into an opaque environment such as milk. Whereas the gel point was delayed proportionally to the powder rehydration length, the storage modulus appears unaffected. Besides, the gelation onset was not altered by the powder age.

Hydrolysis by Indigenous Plasmin: Consequences for Enzymatic Cross-Linking and Acid-Induced Gel Formation of Non-Micellar Casein

2019 ◽  
Vol 15 (1) ◽  
pp. 32-41
Author(s):  
Norbert Raak ◽  
Lena Brehm ◽  
Rebecca Leidner ◽  
Thomas Henle ◽  
Harald Rohm ◽  
...  
Keyword(s):  
Cross Linking ◽  
Gel Formation ◽  
Micellar Casein

Improving Wire Sweep Performance by Measuring Degree of Cure of Epoxy Mold Compounds

2011 ◽  
Author(s):  
Sheila Liza B. Dal
Keyword(s):  
Differential Scanning Calorimetry ◽  
Shelf Life ◽  
Trial And Error ◽  
Active Components ◽  
Scanning Calorimetry ◽  
Degree Of Cure ◽  
Electronic Package ◽  
Viscosity Changes ◽  
Epoxy Mold Compounds

Abstract The choice of epoxy mold compound (EMC) for an electronic package is based mostly on how much protection it provides to the active components in the package. But the choice is not a straightforward process. Rather it is mostly trial and error using different assembly parameters to find the most robust material while assembly defects are monitored. One such defect associated to EMC processing is wire sweep, and many studies have shown that it is mainly caused by viscosity changes in the EMC. In this study, samples of EMC in various stages of shelf life and staging times were analyzed for degree of cure using a method called differential scanning calorimetry (DSC). Samples are then processed at assembly for wire sweep measurement. It was found out that degree of cure increases with staging time at different rates for each shelf life. It was also found out that wire sweep did not only increase with degree of cure but it was also found to be predictable with respect to the latter. Using this information, the age and staging limit for each material was identified that would not cause wire sweep issues.

Preparation of graft copolymers by the reaction of polymeric acyl chlorides with monohydroxy-terminated polymers: An introductory study

1988 ◽  
Vol 53 (8) ◽  
pp. 1735-1744 ◽  
Author(s):  
Jitka Horská ◽  
Jaroslav Stejskal ◽  
Pavel Kratochvíl ◽  
Aubrey D. Jenkins ◽  
Eugenia Tsartolia ◽  
...  
Keyword(s):  
Light Scattering ◽  
Chemical Composition ◽  
Statistical Model ◽  
Graft Copolymers ◽  
Coupling Reaction ◽  
Molecular Characteristics ◽  
Gel Formation ◽  
Acyl Chlorides ◽  
Molecular Weights

An attempt was made to prepare well-defined graft copolymers by the coupling reaction between acyl chloride groups located along the backbone chain and monohydroxy-terminated grafts prepared separately. The molecular weights and the parameters of heterogeneity in chemical composition of the products were determined by light scattering and osmometry. The determination of molecular characteristics revealed that the degree of grafting was low. The results therefore could not be confronted with a statistical model at this stage. The problems encountered in the synthesis, e.g., gel formation, and the data relating to the soluble products are discussed.

Assessment of gel formation in colloidal dispersions during mixing in turbulent jets

AIChE Journal ◽  
2013 ◽  
Vol 59 (12) ◽  
pp. 4567-4581 ◽  
Author(s):  
Miroslav Soos ◽  
Daniele L. Marchisio ◽  
Jan Sefcik
Keyword(s):  
Turbulent Jets ◽  
Colloidal Dispersions ◽  
Gel Formation

scholarly journals Antioxidant Network Based on Sulfonated Polyhydroxyalkanoate and Tannic Acid Derivative

2021 ◽  
Vol 8 (1) ◽  
pp. 9
Author(s):  
Laura Brelle ◽  
Estelle Renard ◽  
Valerie Langlois
Keyword(s):  
Gallic Acid ◽  
Tannic Acid ◽  
Water Soluble ◽  
Gel Formation ◽  
Ene Reaction ◽  
Inorganic Cations ◽  
Medium Chain Length ◽  
Physically Crosslinked ◽  
The Stability ◽  
Derivatives Of

A novel generation of gels based on medium chain length poly(3-hydroxyalkanoate)s, mcl-PHAs, were developed by using ionic interactions. First, water soluble mcl-PHAs containing sulfonate groups were obtained by thiol-ene reaction in the presence of sodium-3-mercapto-1-ethanesulfonate. Anionic PHAs were physically crosslinked by divalent inorganic cations Ca2+, Ba2+, Mg2+ or by ammonium derivatives of gallic acid GA-N(CH3)3+ or tannic acid TA-N(CH3)3+. The ammonium derivatives were designed through the chemical modification of gallic acid GA or tannic acid TA with glycidyl trimethyl ammonium chloride (GTMA). The results clearly demonstrated that the formation of the networks depends on the nature of the cations. A low viscoelastic network having an elastic around 40 Pa is formed in the presence of Ca2+. Although the gel formation is not possible in the presence of GA-N(CH3)3+, the mechanical properties increased in the presence of TA-N(CH3)3+ with an elastic modulus G’ around 4200 Pa. The PHOSO3−/TA-N(CH3)3+ gels having antioxidant activity, due to the presence of tannic acid, remained stable for at least 5 months. Thus, the stability of these novel networks based on PHA encourage their use in the development of active biomaterials.

A mitochondria-targeted near-infrared fluorescent probe for imaging viscosity in living cells and a diabetic mice model

2021 ◽  
Author(s):  
Bochao Chen ◽  
Shumei Mao ◽  
Yanyan Sun ◽  
Liyuan Sun ◽  
Ning Ding ◽  
...  
Keyword(s):  
Mouse Model ◽  
Fluorescent Probe ◽  
Near Infrared ◽  
Diabetic Mouse ◽  
Living Cells ◽  
Pancreatic Tissue ◽  
Diabetic Mice ◽  
Mice Model ◽  
Viscosity Changes

A mitochondria-targeted near-infrared fluorescent probe NIR-V with 700 nm emission was designed to monitor cell viscosity changes, which was applied to detect the intracellular viscosity and imagine pancreatic tissue in diabetic mouse model.

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