scholarly journals Single‐step equipment‐free extracellular vesicle concentration using super absorbent polymer beads

2021 ◽  
Vol 10 (4) ◽  
Author(s):  
Hee Cheol Yang ◽  
Yoo Min Ham ◽  
Jeong Ah Kim ◽  
Won Jong Rhee
Keyword(s):  
Extracellular Vesicle ◽  
Single Step ◽  
Polymer Beads ◽  
Super Absorbent Polymer ◽  
Absorbent Polymer

scholarly journals Multimodal Reduction of Elastic Vibrations in Plate Structure using Super Absorbent Polymer Beads

2020 ◽  
Vol 3 (1) ◽  
pp. 21-29
Author(s):  
Takahiro Tomioka ◽  
Karen Minamisawa
Keyword(s):  
Vibration Reduction ◽  
Basic Mechanism ◽  
Vibration Measurement ◽  
Scale Model ◽  
Railway Vehicle ◽  
Polymer Beads ◽  
Super Absorbent Polymer ◽  
Elastic Vibrations ◽  
Reduction Effect ◽  
Absorbent Polymer

This paper deals with multimodal reduction of structural elastic vibrations. Super absorbent polymer beads (SAP beads) have been introduced as a simple damping device inspired by the multimodal vibration reduction effect by passengers on railway vehicles. A series of vibration measurement tests using a 1:10 scale model of railway vehicle floor structure (model underframe) was carried out. The SAP beads which are sold commonly as water retention agent were stacked in a container and applied to the model underframe. From the experiments, multimodal vibration reduction effects have been demonstrated. A drastic difference has been observed when water was added together with SAP beads. To investigate the basic mechanism of the damping effect obtained by the experiments, an analytical model, which consists of multiple masses that are supported at an angle to each other, and its simplified model was proposed and numerical studies were conducted. Some specific combinations of the mass, spring, and damping elements in the model could express the experimental results well, and it has been estimated from the numerical results that each SAP layer act as an un-uniform subsystem.

scholarly journals “Nanofiltration” Enabled by Super-Absorbent Polymer Beads for Concentrating Microorganisms in Water Samples

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Xing Xie ◽  
Janina Bahnemann ◽  
Siwen Wang ◽  
Yang Yang ◽  
Michael R. Hoffmann
Keyword(s):  
Water Samples ◽  
Polymer Beads ◽  
Super Absorbent Polymer ◽  
Absorbent Polymer

scholarly journals The Influence of Monomer Composition and Surface-CrossLinking Condition on Biodegradation and Gel Strength of Super Absorbent Polymer

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 663
Author(s):  
Jung Soo Kim ◽  
Dong Hyun Kim ◽  
Youn Suk Lee
Keyword(s):  
Treatment Time ◽  
Gel Strength ◽  
Control Group ◽  
Cellulose Content ◽  
Retention Capacity ◽  
Super Absorbent Polymer ◽  
Monomer Composition ◽  
Cellulose Hydrogel ◽  
Improved Performance ◽  
Absorbent Polymer

In this study, a superabsorbent polymer (SAP) comprising poly (IA-co-cellulose-co-VSA-co-AA; ICVA) core-SAP (CSAP) was synthesized through radical polymerization using itaconic acid (IA), acrylic acid (AA), cellulose, and vinyl sulfonic acid (VSA) as monomers. The absorption performances and relative biodegradability of various compositions prepared by adjusting the amounts of cellulose and VSA with constant IA and AA content were compared. Increasing the cellulose content in CSAP contributed to improved biodegradation of the surface-crosslinked SAP (SSAP) and gel strength, although the free absorbency (FA) and centrifuge retention capacity (CRC) decreased. Increasing the VSA content resulted in strong anionicity, which enables the absorption of large amounts of water. Surface-crosslinking technology was applied to the CSAP synthesized with the optimal composition ratio to increase its absorption performance and gel strength. Improved performance of the synthesized SSAP (a CRC of 30.4 g/g, absorbency under load (AUL) of 23.3 g/g, and permeability of 55 s) was achieved by selecting the optimal surface-crosslinking treatment time and the amount of distilled water in the surface-crosslinking solution: as the latter was increased in the surface-crosslinking solution, the AUL and permeability of the SSAP were improved, and its biodegradability was found to be 54% compared to the 100% biodegradable cellulose hydrogel in the control group.

scholarly journals Effects of Super-Absorbent Polymer Application on Yield and Yield Components of Rapeseed (Brassica napus L.)

2015 ◽  
Vol 7 (3) ◽  
pp. 361-366 ◽  
Author(s):  
Fariborz SHEKARI ◽  
Abdollah JAVANMARD ◽  
Amin ABBASI
Keyword(s):  
Water Use ◽  
Field Condition ◽  
Block Design ◽  
Embryo Abortion ◽  
Super Absorbent Polymer ◽  
Irrigation Interval ◽  
Randomized Block Design ◽  
Rapeseed Production ◽  
Polymer Application ◽  
Absorbent Polymer

Limitation of water resources and its great impact on agricultural and natural resources play a crucial role in the efficiency of water use. Applying super absorbent polymer to the soil may be one of the methods to minimize the stress of weather dryness in arid and semi-arid regions. In order to evaluate the effects of hydrophilic polymer application on yield and water use efficiency of rapeseed plants, an experiment was conducted under field condition in 2012 at the Research Farm of the Faculty of Agriculture, University of Maragheh. Treatments’ factors were: (i) 3 super absorbent polymers (SAP) (Taravat A200) levels of 0 (without application), 75 and 150 kg ha-1 A200 application, (ii) three irrigation levels of 80, 120 and 180 mm evaporation from class A basin in main plots, (iii) two cultivars ʻHyola 401ʼ and ʻRVSʼ in sub plots as factorial split plot combination based on completely randomized block design with three replications. The results showed that in all of the measured traits within the experiment there were significant differences between SAP levels. Furthermore, increasing irrigation interval led to an increase in a thousand seeds’ weight, but decreased seed yield. Increasing water stress raised seed oil percent and infertile silique and subsequently resulted in reduced oil yield. ʻHyola 401ʼ was more susceptible to embryo abortion compared with ʻRVSʼ. As a conclusion of the research, SAP (A200) application in quantities smaller than 75 kg ha-1 may be recommended for rapeseed production under field condition.

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