Strong and biocompatible lignin /poly (3-hydroxybutyrate) composite nanofibers

In this study, we proposed lignin copolymers as mechanical reinforcement agents for PHB. A series of lignin copolymers (random and block) were synthesized via the solvent free ring-opening polymerization (ROP) of β-butyrolactone and/or ε-caprolactone onto lignin core. The lignin copolymers were characterized by nuclear magnetic resonance (NMR), gel permeation chromatography (GPC) and differential scanning calorimetry (DSC). Next, these lignin copolymers were incorporated into PHB nanofibers as reinforcement fillers, in order to improve their mechanical properties. It is found that the lignin block copolymer with poly(ε-caprolactone) (PCL) segment followed by PHB segment (LPC + H) displayed the best mechanical improvement. Tensile strength of PHB nanofibers enhanced from 1.81 MPa to 3.13 MPa, and elongation at break increased from 15% of 55%. In the reinforced system, lignin plays as a rigid core, PCL acts a rubbery layer and PHB segment forms strong bonding with fiber matrix. Moreover, PHB/lignin nanofibers were demonstrated with superior biodegradability and biocompatibility, indicating that the new nanofibrous system holds great potential for biomedical applications. Graphical abstract
Source: Composites Science and Technology - Category: Science Source Type: research

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In the future, a midwife could do an ultrasound of a high-risk pregnancy in the comfort of the mother’s home, a doctor with a backpack could examine entire refugee camps, or emergency services could diagnose trauma patients at an accident scene. It’s all possible with portable ultrasound machines. It’s peak technological performance. That’s why The Medical Futurist got thrilled when Philips sent us their Lumify system for testing. Check out our Philips Lumify portable ultrasound review below. Portable ultrasounds are the future Looking at the evolution of diagnostic devices, it becomes apparent that...
Source: The Medical Futurist - Category: Information Technology Authors: Tags: Future of Medicine Medical Professionals Patients Portable Diagnostics Telemedicine & Smartphones digital health Health 2.0 Innovation lumify philips review technology ultrasound Source Type: blogs
Publication date: Available online 20 August 2018Source: Journal of Pharmaceutical and Biomedical AnalysisAuthor(s): Randeep Kaur, V.R. SinhaAbstractThe present investigation was aimed at the evaluation of possible interactions between mirtazapine and selected solid lipids that are commonly used to develop solid lipid nanoparticles (SLNs) and nanostructured lipidic carriers (NLCs). The solids lipids explored were palmitic acid, stearic acid, glycerylmonostearate, cutina CPPH, sterotex NF, gelucire 50/13, hydrogenated castor oil and compritol 888 ATO. The techniques used were Differential Scanning Calorimetry (DSC), Fourier...
Source: Journal of Pharmaceutical and Biomedical Analysis - Category: Drugs & Pharmacology Source Type: research
In this study, a simple modified glassy carbon electrode with Polydopamine-multiwalled carbon nanotubes (GCE/PDA-MWCNTs) is described for selective and sensitive simultaneous voltammetric determination of dopamine (DA), acetaminophen (AC), and xanthine (XN). A detailed investigation by field emission scanning electron microscopy, Fourier transform infrared spectroscopy and electrochemistry methods such as cyclic voltammetry (CV), electrochemical impedance spectroscopy, differential pulse voltammetry (DPV) and chronoamperometry are performed in order to elucidate the preparation process and properties of the GCE/ PDA-MWCNTs...
Source: Journal of Pharmaceutical and Biomedical Analysis - Category: Drugs & Pharmacology Source Type: research
Conclusion: Comparisons using single and multiple coil acquisition show that the proposed residual network provides good reconstruction results with orders of magnitude faster computational time than existing CS methods. Significance: The proposed deep learning framework may have a great potential for accelerated MR reconstruction by generating accurate results immediately.
Source: IEEE Transactions on Biomedical Engineering - Category: Biomedical Engineering Source Type: research
Zowie Gallagher, from Woodford Green in East London, initially thought she had a hernia but scans revealed a tumour the size of a mango on her pelvis, which needed surgery to remove.
Source: the Mail online | Health - Category: Consumer Health News Source Type: news
Publication date: Available online 20 August 2018Source: Journal of Physics and Chemistry of SolidsAuthor(s): Divya Vyas, Aditi Singhal, Sudhanshu sharmaAbstractHigh surface area nanoparticles of antimony doped tin oxide are synthesized for the first time by one step solution combustion method using tin oxalate and antimony chloride as precursors. The synthesis method is rapid and gives particles of sizes 9–13 nm. The material has a specific surface area of 84 m2/g as estimated by Brunaure-Emmett-Teller (BET) model. The structural properties, surface morphologies, electrical and electrochemical properties are stu...
Source: Journal of Physics and Chemistry of Solids - Category: Physics Source Type: research
Publication date: Available online 20 August 2018Source: Biosensors and BioelectronicsAuthor(s): Yoonbae Oh, Michael L. Heien, Cheonho Park, Yu Min Kang, Jaekyung Kim, Suelen Lucio Boschen, Hojin Shin, Hyun U Cho, Charles D. Blaha, Kevin E. Bennet, Han Kyu Lee, Sung Jun Jung, Kendall H. Lee, Dong Pyo JangAbstractFor over two decades. fast-scan cyclic voltammetry (FSCV) has served as a reliable analytical method for monitoring dopamine release in near real-time in vivo. However, contemporary FSCV techniques have been limited to measuring only rapid (on the order of seconds, i.e. phasic) changes in dopamine release evoked by...
Source: Biosensors and Bioelectronics - Category: Biotechnology Source Type: research
Publication date: 5 January 2019Source: Journal of Molecular Structure, Volume 1175Author(s): Bokolombe P. Ngoy, Aviwe K. May, John Mack, Tebello NyokongAbstractThe optical limiting (OL) properties of 3,5-di-p-benzyloxystyrylBODIPY dyes that contain both protons and bromine atoms at the 2,6-positions have been investigated by using the Z-scan technique at 532 nm on the nanosecond timescale. There is relatively weak absorbance at 532 nm under ambient light conditions, because the incorporation of p-benzyloxystyryl groups at the 3,5-positions results in a ca. 140 nm red shift of the main BODIPY spectral band to the 640...
Source: Journal of Molecular Structure - Category: Molecular Biology Source Type: research
Publication date: Available online 20 August 2018Source: Life SciencesAuthor(s): Aisha Khatoon, Farheen Khan, Nabeel Ahmad, Sibhghatulla Shaikh, Syed Mohd. Danish Rizvi, Shazi Shakil, Mohammad H. Al-Qahtani, Adel M. Abuzenadah, Shams Tabrez, Abo Bakr Fathy Ahmed, Ahmed Alafnan, Hayatul Islam, Danish Iqbal, Rajiv DuttaAbstractSilver nanoparticles (AgNPs) have been used in various medicinal and commercial products because of their exceptional anti-microbial and anti-odor properties. On the other hand, increased commercialization of AgNPs containing products has led to its release into the environment. Thus, studies are neede...
Source: Life Sciences - Category: Biology Source Type: research
This study therefore evaluates the compatibility bioleaching microorganisms with X-ray energy exposure. The X-ray effect on a mixed thermophilic culture suspended in solution was assessed using imaging conditions of 35-150 kV, 200-280 µA and 1-2 hours. Microorganisms were unaffected between 35-90 kV and 200-280 µA while there was some detrimental effect at 120 and 150 kV. The X-ray influence on a mixed mesophilic culture colonising a mineral surface was investigated at 90 kV and 225 µA for a 1 hour exposure time. The system was monitored befor...
Source: Biochemical Engineering Journal - Category: Biochemistry Source Type: research
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