scholarly journals Influence of alkaline delignification on moisture uptake behavior and bonding enthalpies of hemp

2021 ◽  
pp. 50990
Author(s):  
Albert M. Manich ◽  
Manuel J. Lis ◽  
Sonia Perez‐Rentero ◽  
Ines Algaba ◽  
Meritxell Marti ◽  
...  
Keyword(s):  
Moisture Uptake ◽  
Alkaline Delignification

scholarly journals Influence of alkaline delignification time on the moisture uptake behaviour of hemp

2021 ◽  
pp. 1-11
Author(s):  
Albert M. Manich ◽  
Manuel J. Lis Arias ◽  
Sonia Pérez-Rentero ◽  
Marta Riba-Moliner ◽  
Gabriela Mijas ◽  
...  
Keyword(s):  
Moisture Uptake ◽  
Alkaline Delignification

Tracking physical breakdown of rice- and wheat-based foods with varying structures during gastric digestion and its influence on gastric emptying in a growing pig model

2021 ◽  
Author(s):  
Joanna Nadia ◽  
Alexander G. Olenskyj ◽  
Natascha Stroebinger ◽  
Suzanne M. Hodgkinson ◽  
Talia G. Estevez ◽  
...  
Keyword(s):  
Particle Size ◽  
Gastric Emptying ◽  
Pig Model ◽  
Moisture Uptake ◽  
Gastric Digestion ◽  
Food Structure ◽  
Growing Pig ◽  
Effect Of Food

There is currently a limited understanding of the effect of food structure on physical breakdown and gastric emptying of solid starch-based foods during gastric digestion. Moisture uptake, pH, particle size,...

scholarly journals The effect of high pressure treatment on the quality of chicken breast meat

2020 ◽  
Vol 14 (3-4) ◽  
pp. 76-81
Author(s):  
Nives Marušić Radovčić ◽  
Damir Ježek ◽  
Ksenija Markov ◽  
Jadranka Frece ◽  
Duška Ćurić ◽  
...  
Keyword(s):  
High Pressure ◽  
Treatment Time ◽  
Elevated Pressure ◽  
Quality Parameters ◽  
High Pressure Processing ◽  
Chicken Breast ◽  
Moisture Uptake ◽  
Breast Meat ◽  
Chicken Breast Meat ◽  
Cooking Yield

In the present work, the effect of high pressure processing (HPP) (0, 100, 200 and 300 MPa) and different treatment time (5 and 10 minutes) on the moisture uptake, cooking yield, colour and texture, as well as microbial population of chicken breast fillets was investigated. The application of high hydrostatic pressure resulted in a modification of quality parameters of chicken breast meat. By increasing pressure and time of the treatment the moisture uptake was reduced: samples treated with 300 MPa for 10 min had the lowest moisture uptake values. Cooking yield was not affected by HPP treatments. Increased pressure affected the colour by increasing L*, a* and b* values (only HPP treatment of 100 MPa in duration of 5 and 10 minutes did not affect colour of chicken breast meat). Lower pressures (100 and 200 MPa) tenderized, whereas elevated pressure (300 MPa) increased hardness in chicken breast fillets. Higher level of pressure (300 MPa) reduced bacteria count by about 3.0 – 5.3 log (CFU/g), depending on the microorganism and duration of the process.

Effect Of Moisture On The Physical Properties Of Polyimide Films

1991 ◽  
Vol 227 ◽  
Author(s):  
Rajeevi Subramanian ◽  
Michael T. Pottiger ◽  
Jacqueline H. Morris ◽  
Joseph P. Curilla
Keyword(s):  
Dielectric Constant ◽  
Steady State ◽  
Electrical Properties ◽  
Relative Humidity ◽  
Quartz Crystal ◽  
Moisture Absorption ◽  
Relative Dielectric Constant ◽  
Moisture Uptake ◽  
Polyimide Films ◽  
Effect Of Moisture

ABSTRACTMoisture absorption and its effect on electrical properties were measured for several polyimides. A Quartz Crystal Microbalance (QCM) was used to investigate the moisture absorption in BPDA/PPD, PMDA/ODA, and BTDA//ODA/MPD polyimides. The steady-state moisture uptake in polyimides as a function of relative humidity (RH) was determined by exposing film samples to successively higher RH values ranging from 10 to 85% at 25°C. The isothermal moisture absorption as a function of percent RH was found to be nearly linear for all of the polyimides studied. The effect of moisture on the electrical properties of a BPDA/PPD polyimide was also investigated. The relative dielectric constant at 25 °C was found to be a linear function of the moisture absorbed.

Application of self-healing, swellable and biodegradable polymers for wound treatment

2021 ◽  
Vol 30 (Sup9a) ◽  
pp. IVi-IVx
Author(s):  
Chukwuma O Agubata ◽  
Mary A Mbah ◽  
Paul A Akpa ◽  
Godwin Ugwu
Keyword(s):  
Wound Healing ◽  
Polyvinyl Alcohol ◽  
Biodegradable Polymers ◽  
Hydroxypropyl Methylcellulose ◽  
Composite Films ◽  
Self Healing ◽  
Moisture Uptake ◽  
Folding Endurance

Aim: Self-healing, swellable and biodegradable polymers are vital materials that may facilitate the different stages of wound healing. The aim of this research was to prepare wound healing films using self-healing polyvinyl alcohol (PVA), swellable hydroxypropyl methylcellulose (HPMC), biodegradable polyglycolic acid (PGA) sutures and ciprofloxacin antibiotic for improved treatment outcome. Methods: Films were formulated through aqueous-based mixing of varying amounts of polyvinyl alcohol (10–20% weight/weight (w/w)) and hydroxypropyl methylcellulose (0.5, 1% w/w) with fixed quantities of ciprofloxacin. PGA sutures were placed as grids within the wet mixtures of the polymers and ciprofloxacin, and thereafter products were air dried. The formulated films were evaluated for swelling ratio, breaking elongation, folding endurance, moisture uptake and loss, compatibility and in vitro antibiotic release. Furthermore, in vivo wound healing was studied using excision model and histopathological examinations. Results: Swelling ratios were above 1.0 and the films were minimally stretchable, with folding endurance greater than 500. Films were stable while moisture uptake and loss were observed to be less than 30%. Among the optimised hydrogel batches, those containing 10% w/w PVA and 1% w/w HPMC with no PGA showed the highest drug release of 73%, whereas the batches with higher PGA content showed higher percentage wound size reduction with minimal scar. The completeness of wound healing with batches containing PVA, HPMC, ciprofloxacin and PGA, along with the standard, is evident considering the massive cornification, regeneration of the epithelial front and stratum spinosum. Conclusion: The findings show that polymer-based multifunctional composite films are suitable for use as dressings for improved wound healing.

scholarly journals Synergistic Effect of Halloysite Nanotubes and Glycerol on the Physical Properties of Fish Gelatin Films

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1258 ◽  
Author(s):  
Xiaohu Qiang ◽  
Songyi Zhou ◽  
Zhuo Zhang ◽  
Qiling Quan ◽  
Dajian Huang
Keyword(s):  
Water Resistance ◽  
Water Solubility ◽  
Composite Films ◽  
Halloysite Nanotubes ◽  
Light Transmittance ◽  
Fish Gelatin ◽  
Moisture Uptake ◽  
Casting Method ◽  
Gelatin Films ◽  
Light Region

Fish gelatin (FG)/glycerol (GE)/halloysite (HT) composite films were prepared by casting method. The morphology of the composite films was observed by scanning electron microscopy (SEM). The effects of HT and GE addition on the mechanical properties, water resistance and optical properties of the composites were investigated. Results showed that with increasing GE content, the elongation at composite breaks increased significantly, but their tensile strength (TS) and water resistance decreased. SEM results showed that GE can partly promote HT dispersion in composites. TS and water resistance also increased with the addition of HTs. Well-dispersed HTs in the FG matrix decreased the moisture uptake and water solubility of the composites. All films showed a transparency higher than 80% across the visible light region (400–800 nm), thereby indicating that light transmittance of the resulting nanocomposites was slightly affected by GE and HTs.

scholarly journals Studies on effect of coat thickness on the moisture uptake by a hardwood substrate

2016 ◽  
pp. 0-0 ◽  
Author(s):  
Sachin Gupta ◽  
Asieleavio John ◽  
V.S. Kishan Kumar
Keyword(s):  
Moisture Uptake

scholarly journals Side chain length impacting thermal transitions and water uptake of acrylate–maleimide copolymers with pendent catechols

RSC Advances ◽  
2017 ◽  
Vol 7 (77) ◽  
pp. 49114-49118 ◽  
Author(s):  
M. A. Bartucci ◽  
E. Napadensky ◽  
J. L. Lenhart ◽  
J. A. Orlicki
Keyword(s):  
Chain Length ◽  
Water Uptake ◽  
Side Chain ◽  
Moisture Uptake ◽  
Thermal Transitions ◽  
Side Chain Length ◽  
Alkyl Acrylate

Significant moisture uptake was observed for a family of catechol side-chain poly(alkyl acrylate-maleimide)s (PAMs) intended to probe the effects of Tg and polarity.

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