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https://www.readbyqxmd.com/read/29350538/express-potential-second-harmonic-ghost-bands-in-the-fourier-transform-infrared-ft-ir-difference-spectroscopy-of-proteins
#1
Shota Ito, Hideki Kandori, Victor A Lorenz Fonfria
No abstract text is available yet for this article.
January 1, 2018: Applied Spectroscopy
https://www.readbyqxmd.com/read/29339813/a-new-group-of-synthetic-phenolic-containing-amphiphilic-molecules-for-multipurpose-applications-physico-chemical-characterization-and-cell-toxicity-study
#2
Sampson Anankanbil, Bianca Pérez, Iva Fernandes, Katarzyna Magdalena Widzisz, Zegao Wang, Nuno Mateus, Zheng Guo
Nine synthetic amphiphilic phenolic lipids, varied in phenolic moiety (caffeoyl/dimethylcaffeoyl) and fatty acid chain lengths (8-18) were characterized by differential scanning calorimetry (DSC), temperature-ramp Fourier transform infra-red spectroscopy (FT-IR) and atomic force microscopy (AFM). FT-IR and DSC results revealed that the physical state and lateral packing of synthetic molecules were largely governed by fatty acyls. The critical micelle concentrations (CMC) of synthetic lipids was in the range of 0...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29337577/preparation-of-nano-au-pt-alloy-microspheres-decorated-with-reduced-graphene-oxide-for-non-enzymatic-hydrogen-peroxide-sensing
#3
Zhixue Bai, Wenhao Dong, Yipeng Ren, Cong Zhang, Qiang Chen
The flourish of nanotechnology has brought new vitality to the research and development of electrochemical sensing materials. In this work, we successfully synthesized Nano Au & Pt alloy microspheres decorated with reduced graphene oxide (RGO/nAPAMSs) by a simple, facile and eco-friendly one-step reduction strategy for the fabrication of highly sensitive non-enzymatic H2O2 sensing interfaces. Energy-dispersive X-ray spectroscopy mapping (EDX mapping), energy-dispersive X-ray spectroscopy analyzer (EDX), transmission electron microscopy (TEM), Fourier transform infrared spectrum (FT-IR) and X-ray diffraction spectrum (XRD) were employed to characterize RGO/nAPAMSs from a microscopic perspective...
January 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29337321/synthesis-spectroscopic-investigation-and-dft-study-of-n-n-disubstituted-ferrocene-based-thiourea-complexes-as-potent-anticancer-agents
#4
Faiza Asghar, Saira Fatima, Sadaf Rana, Amin Badshah, Ian S Butler, Muhammad Nawaz Tahir
In the present work, the synthesis, characterization (FT-IR, multinuclear (1H and 13C) NMR, AAS, Raman, and elemental analyses), DNA binding (cyclic voltammetry, UV-Vis spectroscopy), and in vitro biological screening of nine new ferrocene-incorporated thioureas (A1-A9) are reported. Furthermore, the single-crystal X-ray structure of compound A8 was also determined. The ferrocene-based N,N'-disubstituted thioureas were derived by allowing the ferrocenyl anilines to react with freshly prepared isothiocyanates under a N2 atmosphere in dry acetone...
January 16, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29337105/chitosan-sodium-tripolyphosphate-nanoparticles-as-efficient-vehicles-for-antioxidant-peptidic-fraction-from-common-kilka
#5
Seyed Fakhreddin Hosseini, Mohammad Reza Soleimani, Maryam Nikkhah
Fish-purified antioxidant peptide (AOP)-loaded chitosan nanoparticles (CSNPs) were synthesized based on the ionotropic gelation between CS and sodium tripolyphosphate (TPP). The ζ-potential showed an earlier rise and later decrease with increasing concentrations of AOP. Transmission electron microscopy (TEM) images also revealed roughly uniform spherical-shaped nanoparticles with diameter of <100 nm. Molecular interactions among the components of the NPs and peptides were confirmed by FT-IR spectroscopy...
January 11, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29337099/facile-preparation-and-characterization-of-ph-sensitive-mt-cmc-nanocomposite-hydrogel-beads-for-propranolol-controlled-release
#6
Hassan Farhadnejad, Seyed Alireza Mortazavi, Mohammad Erfan, Behzad Darbasizadeh, Hamidreza Motasadizadeh, Yousef Fatahi
The main aim of the present study was to design pH-sensitive nanocomposite hydrogel beads, based on carboxymethyl cellulose (CMC) and montmorillonite (Mt)-propranolol (PPN) nanohybrid, and evaluate whether the prepared nanocomposite beads could potentially be used as oral drug delivery systems. PPN-as a model drug-was intercalated into the interlayer space of Mt clay mineral via the ion exchange procedure. The resultant nanohybrid (Mt-PPN) was applied to fabricate nanocomposite hydrogel beads by association with carboxymethyl cellulose...
January 11, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29335199/3-d-mineralized-silk-fibroin-polycaprolactone-composite-scaffold-modified-with-polyglutamate-conjugated-with-bmp-2-peptide-for-bone-tissue-engineering
#7
Jingjing Luo, Haitao Zhang, Jiang Zhu, Xiaokang Cui, Junjiu Gao, Xin Wang, Jie Xiong
In the field of bone tissue engineering, an ideal three-dimensional (3-D) scaffold should not only structurally mimic the extracellular matrix (ECM) in large tissues but also mechanically support the bone healing process and provide biochemical cues to induce osteogenesis. In this study, we investigated the feasibility of functionalisation of scaffolds by coupling polyglutamate acid conjugated with BMP-2 peptide onto silk fibroin (SF)/polycaprolactone (PCL) (SF/PCL) blend nanofibers. The morphology, composition, and mineralisation, were confirmed by FE-SEM, XRD, and FT-IR spectroscopy...
December 28, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29333512/fourier-transform-infrared-spectroscopy-for-analysis-of-kidney-stones
#8
Aysha Habib Khan, Sheharbano Imran, Jamsheer Talati, Lena Jafri
Purpose: To compare the results of a chemical method of kidney stone analysis with the results of Fourier transform infrared (FT-IR) spectroscopy. Materials and Methods: Kidney stones collected between June and October 2015 were simultaneously analyzed by chemical and FT-IR methods. Results: Kidney stones (n=449) were collected from patients from 1 to 81 years old. Most stones were from adults, with only 11.5% from children (aged 3-16 years) and 1...
January 2018: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/29330059/biosynthesis-characterization-and-antimicrobial-activities-of-zinc-oxide-nanoparticles-from-leaf-extract-of-glycosmis-pentaphylla-retz-dc
#9
S Vijayakumar, P Krishnakumar, P Arulmozhi, S Mahadevan, N Parameaswari
Biosynthesized nanoparticles have an incredible application in biomedicine owing to its simplicity, eco-friendly properties and low cost. The present study aims to determine the green synthesized zinc oxide nanoparticles from methanolic leaf extract of Glycosmis pentaphylla. The synthesized nanoparticles were characterized using UV-VIS Spectroscopy, Flourescence spectrometer, FT-IR, XRD, SEM with EDAX and TEM. The confirmations of synthesized nanoparticles were characterized by peak at 351 and 410 nm in the UV-VIS spectrum and photoluminescence spectrum respectively...
January 9, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29323901/microbial-biosynthesis-of-silver-nanoparticles-in-different-culture-media
#10
Ke Luo, Samuel Jung, Kyu-Hwan Park, Young-Rok Kim
Microbial biosynthesis of metal nanoparticles has been extensively studied for the applications in biomedical sciences and engineering. However, the mechanism for their synthesis through microorganism is not completely understood. In this study, several culture media were investigated for their roles in the microbial biosynthesis of silver nanoparticles (AgNPs). The size and morphology of the synthesized AgNPs were analyzed by UV-Vis spectroscopy, FT-IR, TEM, and DLS. The results demonstrated that nutrient broth (NB) and Mueller-Hinton broth (MHB) among tested media effectively reduced silver ions to form AgNPs with different particle size and shape...
January 11, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29322009/improvement-of-spatial-learning-and-memory-cortical-gyrification-patterns-and-brain-oxidative-stress-markers-in-diabetic-rats-treated-with-ficus-deltoidea-leaf-extract-and-vitexin
#11
S Nurdiana, Y M Goh, A Hafandi, S M Dom, A Nur Syimal'ain, N M Noor Syaffinaz, M Ebrahimi
Despite the fact that Ficus deltoidea and vitexin played important roles in controlling hyperglycemia, an effective mitigation strategy dealing with cognitive deficit observed in diabetes, little is known about its neuroprotective effects. The study is aimed to determine changes in behavioral, gyrification patterns and brain oxidative stress markers in streptozotocin (STZ)-induced diabetic rats following F. deltoidea and vitexin treatments. Diabetic rats were treated orally with metformin, methanolic extract of F...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29318306/graphene-oxide-co3o4-nanocomposite-synthesis-characterization-and-its-adsorption-capacity-for-the-removal-of-organic-dye-pollutants-from-water
#12
Kolsoum Pourzare, Saeed Farhadi, Yaghoub Mansourpanah
In this work, graphene oxide/Co3O4 nanocomposite was synthesized via hydrothermal decomposition of [Co(en)3] (NO3)3 complex onto graphene oxide nanosheets. The as-prepared nanocomposite (denoted as GO/Co3O4) was structurally characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopies (TEM and SEM), energy dispersive X-ray (EDX) spectroscopy, magnetic measurements, and N2 adsorption-desorption analysis. The results demonstrated successful immobilization of Co3O4 nanoparticles with an average diameter size of around 12...
December 2017: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29318098/synthesis-and-liquid-crystalline-properties-of-unsymmetrically-substituted-naphthalenediimides-with-a-polar-headgroup-effect-of-amide-hydrogen-bonding-and-alkyl-chain-length
#13
Namdev V Ghule, Rajesh S Bhosale, Sidhanath V Bhosale, Turlapati Srikanth, Nandiraju V S Rao, Sheshanath V Bhosale
A series of new unsymmetrically substituted naphthalenediimide (NDI) moieties NDI-1 to NDI-6 were synthesized. The structures of these compounds were confirmed by means of FT-IR, 1H NMR, 13C NMR, ESI-mass and HRMS spectroscopic measurements. UV/Vis and fluorescence spectroscopy were employed to investigate the photophysical properties of the prepared compounds in solution and in the solid state. Using the onset of UV/Vis absorption, the optical band gaps were calculated. Cyclic voltammetry measurements were performed to study the electrochemical behavior and to calculate the LUMO energy levels...
January 2018: ChemistryOpen
https://www.readbyqxmd.com/read/29315633/preferential-adsorption-of-flavonoids-from-peanut-shell-by-amino-modified-fe3-o4-nanoparticles-mnp-nh2
#14
Xuexiao Cao, Meng Wang, Lili Sun, Xiaoliang Ren, Gaosheng Pei
BACKGROUND: The highly selective capture of individual components of complex systems such as Chinese medicine extracts is a great challenge. With the rapid development of nanoscience, magnetic materials have attracted increased attention as suitable candidates for use in drug transport vehicles. RESULTS: In this work, amino-modified Fe3 O4 nanoparticles (MNP-NH2 ) have been synthesized and successfully used to selectively isolate Luteolin, a type of flavonoid, from peanut shell, coupled with high-performance liquid chromatography (HPLC)...
January 9, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29315610/magnetic-dispersive-solid-phase-extraction-based-on-graphene-oxide-fe3-o4-polythionine-nanocomposite-followed-by-atomic-absorption-spectrometry-for-zinc-monitoring-in-water-flour-celery-and-egg
#15
Azar Babaei, Mohsen Zeeb, Ali Es-Haghi
BACKGROUND: Magnetic graphene oxide nanocomposite has been proposed as promising and sustainable sorbent for the extraction and separation of target analytes from food matrices. Sample preparation based on nanocomposite presents several advantages such as desired efficiency, reasonable selectivity and high surface area-to-volume ratio. RESULTS: A new graphene oxide/Fe3 O4 @polythionine (GO/Fe3 O4 @PTh) nanocomposite sorbent was introduced for magnetic dispersive solid-phase extraction (MDSPE) and flame atomic absorption spectrometric (FAAS) detection of zinc (II) in water, flour, celery and egg...
January 9, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29311688/innovative-linear-low-density-polyethylene-nanocomposite-films-reinforced-with-organophilic-layered-double-hydroxides-fabrication-morphology-and-enhanced-multifunctional-properties
#16
Jiazhuo Xie, Haijun Wang, Zhou Wang, Qinghua Zhao, Yuechao Yang, Geoffrey I N Waterhouse, Lei Hao, Zihao Xiao, Jing Xu
Herein, we reported the successful development of novel nanocomposite films based on linear low density polyethylene (LLDPE) with enhanced anti-drop, optical, mechanical, thermal and water vapor barrier properties by introducing organophilic layered double hydroxides (OLDHs) nanosheets. OLDHs loadings were varied from 0-6 wt.%. Structural analyses using the Fourier transform infrared spectrum (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) indicated that the OLDHs nanosheets were homogeneously dispersed with an ordered alignment in the LLDPE matrix...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29309158/drug-excipient-interactions-effect-on-molecular-mobility-and-physical-stability-of-ketoconazole-organic-acid-coamorphous-systems
#17
Michelle H Fung, Marla DeVault, Keith T Kuwata, Raj Suryanarayanan
The use of excipients other than polymers for enhancing the physical stability of amorphous active pharmaceutical ingredients (APIs) has largely been unexplored. We investigated several organic acids (oxalic, tartaric, citric and succinic acid) for the purpose of stabilizing a weakly basic API, ketoconazole (KTZ), in the amorphous state. Coamorphous systems with each acid, in 1:1 KTZ-acid molar ratio, were prepared by spray drying. The interaction of KTZ with each acid was investigated by FT-IR, solid-state NMR and quantum chemical calculations...
January 8, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29308689/iodinated-curcumin-bearing-dermal-cream-augmented-drug-delivery-antimicrobial-and-antioxidant-activities
#18
Gagandeep Manchanda, Rupinder Kaur Sodhi, Upendra Kumar Jain, Ramesh Chandra, Jitender Madan
OBJECTIVES: Curcumin (Cur) exhibits weak microbicidal activity owing to high lipophilicity and low cell permeability. Therefore, in present investigation, Cur was iodinated using elemental iodine (I2) to synthesize Cur-I2 powder that later formulated as Cur-I2 dermal cream and characterized in vitro for antimicrobial and antioxidant activities. METHODS AND RESULTS: Electrophilic addition of I2 saturated the olefinic bonds of Cur, as confirmed by UV/Visible spectroscopy, FT-IR, 1H NMR and DSC techniques...
January 6, 2018: Journal of Microencapsulation
https://www.readbyqxmd.com/read/29308664/structural-properties-and-antioxidant-activities-of-polysaccharide-from-fruit-bodies-of-pholiota-nameko
#19
Zhen-Yuan Zhu, Li-Chao Pan, Dan Han, Hui-Qing Sun, Li-Jing Chen
A polysaccharide named PNP was extracted and purified from Pholiota nameko. The total sugar content of PNP was 95.29% and the molecular weight was 1.89 × 103 kDa. The structural features of PNP were investigated by the combination of chemical and instrumental analysis such as UV spectrophotometer, specific rotation determination, FT-IR, methylisation analysis and Congo red. The results showed that the optical rotation of PNP was +120° and that it had a triple-helical structure. Besides, PNP was mainly composed of glucose and mannose at the molar ratio of 4...
January 7, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29308231/the-adsorption-features-between-insecticidal-crystal-protein-and-nano-mg-oh-2
#20
Xiaohong Pan, Zhangyan Xu, Yilin Zheng, Tengzhou Huang, Lan Li, Zhi Chen, Wenhua Rao, Saili Chen, Xianxian Hong, Xiong Guan
Nano-Mg(OH)2, with low biological toxicity, is an ideal nano-carrier for insecticidal protein to improve the bioactivity. In this work, the adsorption features of insecticidal protein by nano-Mg(OH)2 have been studied. The adsorption capacity could reach as high as 136 mg g-1, and the adsorption isotherm had been fitted with Langmuir and Freundlich models. Moreover, the adsorption kinetics followed a pseudo-first or -second order rate model, and the adsorption was spontaneous and an exothermic process. However, high temperatures are not suitable for adsorption, which implies that the temperature would be a critical factor during the adsorption process...
December 2017: Royal Society Open Science
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