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Sodium Polyacrylate

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https://www.readbyqxmd.com/read/29326512/evaluating-the-effect-of-different-conditioning-agents-on-the-shear-bond-strength-of-resin-modified-glass-ionomers
#1
Namith Rai, Rajaram Naik, Ravi Gupta, Shobana Shetty, Amith Singh
Aim of the Study: This study aims to evaluate the effects three different conditioning agents on the shear bond strength of resin-modified glass ionomers to human dentin. Materials and Methods: One hundred and twenty recently extracted, caries-free premolars and molars will be cleaned of debris and disinfected in a 0.5% solution of sodium hypochlorite and sterile water for 30 min. The occlusal surface of each tooth will be reduced using conventional model trimmer with water to produce the dentin surface...
October 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29316506/expansion-microscopy-development-and-neuroscience-applications
#2
REVIEW
Emmanouil D Karagiannis, Edward S Boyden
Many neuroscience questions center around understanding how the molecules and wiring in neural circuits mechanistically yield behavioral functions, or go awry in disease states. However, mapping the molecules and wiring of neurons across the large scales of neural circuits has posed a great challenge. We recently developed expansion microscopy (ExM), a process in which we physically magnify biological specimens such as brain circuits. We synthesize throughout preserved brain specimens a dense, even mesh of a swellable polymer such as sodium polyacrylate, anchoring key biomolecules such as proteins and nucleic acids to the polymer...
January 6, 2018: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/29300301/identification-and-antithrombotic-activity-of-peptides-from-blue-mussel-mytilus-edulis-protein
#3
Meiling Qiao, Maolin Tu, Zhenyu Wang, Fengjiao Mao, Hui Chen, Lei Qin, Ming Du
The blue mussel (Mytilus edulis) reportedly contains many bioactive components of nutritional value. Water-, salt- and acid-soluble M. edulis protein fractions were obtained and the proteins were trypsinized. The resultant peptides were analyzed by ultra-performance liquid chromatography quadrupole time of flight tandem mass spectrometry (UPLC-Q-TOF-MS/MS). 387 unique peptides were identified that matched 81 precursor proteins. Molecular mass distributions of the proteins and peptides were analyzed by sodium dodecyl sulfate-polyacryl amide gel electrophoresis (SDS-PAGE)...
January 4, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29161509/variation-in-the-supersaturation-and-phase-behavior-of-ezetimibe-amorphous-solid-dispersions-upon-dissolution-in-different-biorelevant-media
#4
Ahmed Elkhabaz, Sreya Sarkar, Janny K Dinh, Garth J Simpson, Lynne S Taylor
The delivery of poorly water-soluble drugs using amorphous solid dispersions (ASDs) has been widely acknowledged as a promising strategy for enhancing oral bioavailability. Upon dissolution, ASDs have accelerated dissolution rates and yield supersaturated solutions leading to higher apparent solubilities. Understanding the complex phase behavior of ASDs during dissolution is crucial for developing an effective formulation. Since the absorption of a lipophilic, high permeability drug is determined primarily by the intraluminal dissolution process and the final concentration achieved, there is a need for evaluation in biorelevant dissolution media that simulate both fasting and fed gastrointestinal states...
November 21, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29142881/smear-layer-removal-by-different-chemical-solutions-used-with-or-without-ultrasonic-activation-after-post-preparation
#5
Daniel Poletto, Ana Claudia Poletto, Andressa Cavalaro, Ricardo Machado, Leopoldo Cosme-Silva, Cássia Cilene Dezan Garbelini, Márcio Grama Hoeppner
Objectives: This study evaluated smear layer removal by different chemical solutions used with or without ultrasonic activation after post preparation. Materials and Methods: Forty-five extracted uniradicular human mandibular premolars with single canals were treated endodontically. The cervical and middle thirds of the fillings were then removed, and the specimens were divided into 9 groups: G1, saline solution (NaCl); G2, 2.5% sodium hypochlorite (NaOCl); G3, 2% chlorhexidine (CHX); G4, 11...
November 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29084177/a-highly-flexible-supercapacitor-based-on-mno%C3%A2-rgo-nanosheets-and-bacterial-cellulose-filled-gel-electrolyte
#6
Haojie Fei, Nabanita Saha, Natalia Kazantseva, Robert Moucka, Qilin Cheng, Petr Saha
The flexible supercapacitors (SCs) of the conventional sandwich-type structure have poor flexibility due to the large thickness of the final entire device. Herein, we have fabricated a highly flexible asymmetric SC using manganese dioxide (MnO₂) and reduced graphene oxide (RGO) nanosheet-piled hydrogel films and a novel bacterial cellulose (BC)-filled polyacrylic acid sodium salt-Na₂SO₄ (BC/PAAS-Na₂SO₄) neutral gel electrolyte. Apart from being environmentally friendly, this BC/PAAS-Na₂SO₄ gel electrolyte has high viscosity and a sticky property, which enables it to combine two electrodes together...
October 30, 2017: Materials
https://www.readbyqxmd.com/read/28990656/optimization-of-saponin-extraction-conditions-with-camellia-sinensis-var-assamica-seed-and-its-application-for-natural-detergent
#7
Wanying Gong, Huang Yewei, Aibing Ji, Wenshu Peng, Cong Liu, Ying Zeng, Ruijuan Yang, Liang Yan, Xuanjun Wang, Jun Sheng
BACKGROUND: The Camellia sinensis var. assamica seed cake (by-product of tea-seed oil) is an abundant resource with poor utilization. The C. sinensis var. assamica seed saponin (CSS) is one kind of nonionic surfactant. In this study, The CSS extraction conditions were optimized by response surface methodology (RSM) and then the CSS detergent was developed. Additionally, the safety and decontamination ability of the developed detergent were evaluated. RESULTS: The optimized extraction conditions were including the extracting temperature of 40...
October 9, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28925972/improving-the-efficiency-of-new-automatic-dishwashing-detergent-formulation-by-addition-of-thermostable-lipase-protease-and-amylase
#8
Ashwini Naganthran, Malihe Masomian, Raja Noor Zaliha Raja Abd Rahman, Mohd Shukuri Mohamad Ali, Hisham Mohd Nooh
The use of T1 lipase in automatic dishwashing detergent (ADD) is well established, but efficiency in hard water is very low. A new enzymatic environmentally-friendly dishwashing was formulated to be efficient in both soft and hard water. Thermostable enzymes such as T1 lipase from Geobacillus strain T1, Rand protease from Bacillussubtilis strain Rand, and Maltogenic amylase from Geobacillus sp. SK70 were produced and evaluated for an automatic dishwashing detergent formulation. The components of the new ADD were optimized for compatibility with these three enzymes...
September 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28880381/evaluation-of-feasibility-of-1-5%C3%A2-tesla-prostate-mri-using-body-coil-rf-transmit-in-a-patient-with-an-implanted-vagus-nerve-stimulator
#9
Christopher P Favazza, Heidi A Edmonson, Chi Ma, Yunhong Shu, Joel P Felmlee, Robert E Watson, Krzysztof R Gorny
PURPOSE: To assess risks of RF-heating of a vagus nerve stimulator (VNS) during 1.5 T prostate MRI using body coil transmit and to compare these risks with those associated with MRI head exams using a transmit/receive head coil. METHODS: Spatial distributions of radio-frequency (RF) B1 fields generated by transmit/receive (T/R) body and head coils were empirically assessed along the long axis of a 1.5 T MRI scanner bore. Measurements were obtained along the center axis of the scanner and laterally offset by 15 cm (body coil) and 7 cm (head coil)...
September 7, 2017: Medical Physics
https://www.readbyqxmd.com/read/28813691/effects-of-superabsorbent-polymers-on-the-abundances-of-antibiotic-resistance-genes-mobile-genetic-elements-and-the-bacterial-community-during-swine-manure-composting
#10
Aiyun Guo, Jie Gu, Xiaojuan Wang, Ranran Zhang, Yanan Yin, Wei Sun, Xiaxia Tuo, Li Zhang
Superabsorbent polymers (SAPs) are considered suitable amendments for reducing the selection pressure due to heavy metals and the abundances of antibiotic resistance genes (ARGs) during composting. In this study, three SAP (sodium polyacrylate) levels (0, 5, and 15mgkg(-1) of compost) were applied and their effects on the abundances of ARGs, mobile genetic elements (MGEs), and the bacterial community were investigated. After composting, the abundances of ARGs and MGEs decreased to different extent, where the removal efficiencies for tetW, dfrA7, ermX, aac(6')-ib-cr and MGEs exceeded 90%...
November 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28772848/effect-of-the-cationic-block-structure-on-the-characteristics-of-sludge-flocs-formed-by-charge-neutralization-and-patching
#11
Huaili Zheng, Li Feng, Baoyu Gao, Yuhao Zhou, Shixin Zhang, Bingchen Xu
In this study, a template copolymer (TPAA) of (3-Acrylamidopropyl) trimethylammonium chloride (AATPAC) and acrylamide (AM) was successfully synthesized though ultrasonic-initiated template copolymerization (UTP), using sodium polyacrylate (PAAS) as a template. TPAA was characterized by an evident cationic microblock structure which was observed through the analyses of the reactivity ratio, Fourier transform infrared spectroscopy (FTIR), ¹H ((13)C) nuclear magnetic resonance spectroscopy (¹H ((13)C) NMR), and thermogravimetry/differential scanning calorimetry (TG/DSC)...
May 3, 2017: Materials
https://www.readbyqxmd.com/read/28594022/a-remote-controllable-fiber-type-near-infrared-light-responsive-actuator
#12
Qiuwei Shi, Jiahui Li, Chengyi Hou, Yuanlong Shao, Qinghong Zhang, Yaogang Li, Hongzhi Wang
A novel near-infrared (NIR) light-responsive sodium polyacrylate (PAAS)/graphene oxide (GO) fiber with a torsional pre-deformation structure is reported to realize remote control actuation. The torsional pre-deformed PAAS/GO fiber exhibited various actuation phenomena, under the control of a low powered near-infrared light (50 mW cm(-2)), such as rotating in a low-temperature range (<25 °C), rolling a distance of 10 times of its diameter within 10 s, and even driving the shape change of a fabric (the weight is as high as 20 times of the fiber itself)...
June 8, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28541037/phase-behavior-of-salt-free-polyelectrolyte-gel-surfactant-systems
#13
Martin Andersson, Per Hansson
Ionic surfactants tend to collapse the outer parts of polyelectrolyte gels, forming shells that can be used to encapsulate other species including protein and peptide drugs. In this paper, the aqueous phase behavior of covalently cross-linked polyacrylate networks containing sodium ions and dodecyltrimethylammonium ions as counterions is investigated by means of swelling isotherms, dye staining, small-angle X-ray scattering, and confocal Raman spectroscopy. The equilibrium state is approached by letting the networks absorb pure water...
June 8, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28499631/extrafibrillar-collagen-demineralization-based-chelate-and-rinse-technique-bridges-the-gap-between-wet-and-dry-dentin-bonding
#14
Sui Mai, Chin-Chuan Wei, Li-Sha Gu, Fu-Cong Tian, Dwayne D Arola, Ji-Hua Chen, Yang Jiao, David H Pashley, Li-Na Niu, Franklin R Tay
Limitations associated with wet-bonding led to the recent development of a selective demineralization strategy in which dentin was etched with a reduced concentration of phosphoric acid to create exclusive extrafibrillar demineralization of the collagen matrix. However, the use of acidic conditioners removes calcium via diffusion of very small hydronium ions into the intrafibrillar collagen water compartments. This defeats the purpose of limiting the conditioner to the extrafibrillar space to create a collagen matrix containing only intrafibrillar minerals to prevent collapse of the collagen matrix...
May 9, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28476957/spa-enhanced-fpia-based-detection-of-pesticide-residue-with-ppb-ppt-level-detection-limit
#15
Swathi Korrapati, Phani Kumar Pullela, Uthirapathy Vijayalakshmi
Pesticide residue in fruits & vegetables is one of the key issues affecting the export of rural products in India. Pesticide exposure or intake causes major nervous system problems in children. The solutions to quantitate them in field are rare and the pesticide residue detection in the parts per billion (ppb) ranges is challenging. Except ELISA, none of the existing methods can detect pesticide residues in ppb range in the field. We employed a new approach of concentrating field samples and used sodium polyacrylate (SPA) as water absorbing material...
February 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28453932/a-green-route-to-a-na2fepo4f-based-cathode-for-sodium-ion-batteries-of-high-rate-and-long-cycling-life
#16
Xiang Deng, Wenxiang Shi, Jaka Sunarso, Meilin Liu, Zongping Shao
Sodium ion batteries (SIBs) are considered one of the most promising alternatives for large-scale energy storage due largely to the abundance and low cost of sodium. However, the lack of high-performance cathode materials at low cost represents a major obstacle toward broad commercialization of SIB technology. In this work, we report a green route strategy that allows cost-effective fabrication of carbon-coated Na2FePO4F cathode for SIBs. By using vitamin C as a green organic carbon source and environmentally friendly water-based polyacrylic latex as the binder, we have demonstrated that the Na2FePO4F phase in the as-derived Na2FePO4F/C electrode shows a high reversible capacity of 117 mAh g(-1) at a cycling rate of 0...
May 5, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28411637/armored-enzyme-nanohybrids-and-their-catalytic-function-under-challenging-conditions
#17
Omkar V Zore, Rajeswari M Kasi, Challa V Kumar
Synthesis and characterization of highly stable and functional bienzyme-polymer triads assembled on layered graphene oxide (GO) are described here. Glucose oxidase (GOx) and horseradish peroxidase (HRP) were used as model enzymes and polyacrylic acid (PAA) as model polymer to armor the enzymes. PAA-armored GOx and HRP covalent conjugates were further protected from denaturation by adsorption onto GO nanosheets. Structure and morphology of this enzyme-polymer-nanosheet hybrid biocatalyst (GOx-HRP-PAA/GO) were confirmed by agarose gel electrophoresis, zeta potential, circular dichroism, and transmission electron microscopy...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28274489/re-mineralizing-dentin-using-an-experimental-tricalcium-silicate-cement-with-biomimetic-analogs
#18
Xin Li, Jan De Munck, Kumiko Yoshihara, Mariano Pedano, Kirsten Van Landuyt, Zhi Chen, Bart Van Meerbeek
OBJECTIVES: To characterize the re-mineralization potential of an experimental zirconium oxide (ZrO2) containing tricalcium silicate (TCS) cement, TCS 50, with the incorporation of biomimetic analogs at demineralized dentin. METHODS: Class-I cavities were prepared in non- carious human third molars. The dentin cavities were demineralized using a pH-cycling protocol, involving 50 cyclic immersions in pH-4.8 and pH-7 baths for 0.5h and 2.5h, successively. The cavities were filled with TCS 50 with/without biomimetic analogs (3% polyacrylic acid, 8% sodium trimetaphosphate) being added to the mixed TCS 50 cement prior to application...
March 5, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28263023/gold-nanoparticles-based-solid-phase-microextraction-coatings-for-determining-organochlorine-pesticides-in-aqueous-environmental-samples
#19
Adrián Gutiérrez-Serpa, Priscilla Rocío-Bautista, Verónica Pino, Francisco Jiménez-Moreno, Ana I Jiménez-Abizanda
The use of solid-phase microextraction coatings based on gold nanoparticles was investigated, focusing the attention on the preparation of nanoparticles with nonclassical reduction agents of HAuCl4 such as gallic acid and H2 O2 , rather than the conventional sodium citrate. All nanoparticles were characterized by diode array spectroscopy, whereas novel nanoparticles prepared with gallic acid and H2 O2 were also characterized by microscopic techniques. Solid-phase microextraction coatings were prepared with a layer-by-layer approach...
March 6, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28121154/growth-kinetics-of-polyelectrolyte-complexes-formed-from-oppositely-charged-homopolymers-studied-by-time-resolved-ultra-small-angle-x-ray-scattering
#20
Rintaro Takahashi, Theyencheri Narayanan, Takahiro Sato
We have monitored the kinetic process of polyelectrolyte complex formation between sodium polyacrylate (SPA) and polyallylamine hydrochrolide (PAH) in aqueous NaCl solution by time-resolved ultra-small-angle X-ray scattering (TR-USAXS) combined with rapid mixing. SPA and PAH with different NaCl concentrations from 0 to 1 M were rapidly mixed in equimolar concentration of the monomer units using a stopped-flow apparatus with a dead time of about 2.5 ms. Within the dead time, percolated aggregate-like structures were observed suggesting that the initially formed small charge neutral aggregates further assembled to form higher order agglomerates...
January 30, 2017: Journal of Physical Chemistry Letters
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