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https://www.readbyqxmd.com/read/28214864/a-comparative-study-of-intravenous-injection-form-and-oral-jelly-form-of-alendronate-sodium-hydrate-for-bone-mineral-disorder-after-gastrectomy
#1
Chikara Kunisaki, Yusaku Tanaka, Takashi Kosaka, Hiroshi Miyamoto, Sho Sato, Hideaki Suematsu, Norio Yukawa, Kei Sato, Yusuke Izumisawa, Hirotoshi Akiyama, Masataka Taguri, Takeharu Yamanaka, Itaru Endo
BACKGROUND/AIMS: Osteoporosis is found to have high prevalence after gastrectomy and therefore, it is important to prevent this condition by means of effective medication, such as alendronate sodium hydrate. METHODS: A total number of 48 gastric cancer patients diagnosed with osteoporosis after R0 gastrectomy was registered in this study between December 2013 and August 2014. Twenty-three patients received intravenous (i.v.) alendronate sodium hydrate and 25 patients received the drug in an oral jelly form...
February 18, 2017: Digestion
https://www.readbyqxmd.com/read/28213222/development-of-a-qcm-d-biosensor-for-ochratoxin-a-detection-in-red-wine
#2
Aleksandra Karczmarczyk, Karsten Haupt, Karl-Heinz Feller
Ochratoxin A (OTA), a highly toxic compound, is one of the most widely spread mycotoxins that contaminates a large variety of agricultural commodities. Due to its presence in the food chain, it imposes a hazard on both human and animal health. Therefore, there is a need for precise, fast and simple methods for toxin quantification. Herein, a novel sensor based on a quartz crystal microbalance with dissipation monitoring (QCM-D) and antibodies for specific analyte recognition was developed for rapid and sensitive detection of OTA in red wine...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28213139/antimycobacterial-antimicrobial-activity-experimental-ft-ir-ft-raman-nmr-uv-vis-dsc-and-dft-transition-state-chemical-reactivity-nbo-nlo
#3
Poonam Rawat, R N Singh, Alok Ranjan, Sartaj Ahmad, Rajat Saxena
As part of a study of pyrrole hydrazone, we have investigated quantum chemical calculations, molecular geometry, relative energy, vibrational properties and antimycobacterial/antimicrobial activity of pyrrole-2-carboxaldehyde isonicotinyl hydrazone (PCINH), by applying the density functional theory (DFT) and Hartree Fock (HF). Good reproduction of experimental values is obtained and with small percentage error in majority of the cases in comparison to theoretical result (DFT). The experimental FT-IR and Raman wavenumbers were compared with the respective theoretical values obtained from DFT calculations and found to agree well...
February 11, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28212981/development-of-solid-sedds-vi-effect-of-precoating-of-neusilin%C3%A2-us2-with-pvp-on-drug-release-from-adsorbed-self-emulsifying-lipid-based-formulations
#4
Suhas G Gumaste, Beatryz O S Freire, Abu T M Serajuddin
Adsorption of lipid-based formulations, which are usually liquid, onto silicas has been extensively investigated in the past decade to convert them into solid dosage forms. There are conflicting reports on the ability of commercially available porous silicas, like Neusilin® US2, to release lipid formulations completely, especially after long-term storage. In this study, the release of a model drug, probucol, from different formulations of medium chain lipids and a surfactant, Kolliphor EL (Cremophor EL) or polysorbate 80, were studied after adsorbing them onto Neusilin® US2...
February 14, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28212316/succinimide-formation-from-an-ngr-containing-cyclic-peptide-computational-evidence-for-catalytic-roles-of-phosphate-buffer-and-the-arginine-side-chain
#5
Ryota Kirikoshi, Noriyoshi Manabe, Ohgi Takahashi
The Asn-Gly-Arg (NGR) motif and its deamidation product isoAsp-Gly-Arg (isoDGR) have recently attracted considerable attention as tumor-targeting ligands. Because an NGR-containing peptide and the corresponding isoDGR-containing peptide target different receptors, the spontaneous NGR deamidation can be used in dual targeting strategies. It is well known that the Asn deamidation proceeds via a succinimide derivative. In the present study, we computationally investigated the mechanism of succinimide formation from a cyclic peptide, c[CH₂CO-NGRC]-NH₂, which has recently been shown to undergo rapid deamidation in a phosphate buffer...
February 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28212042/chiral-calcium-phosphate-catalyzed-asymmetric-alkenylation-reaction-of-arylglyoxals-with-3-vinylindoles
#6
Xiao-Yun Li, Wen-Qiang Yuan, Sheng Tang, Yi-Wei Huang, Jia-Hui Xue, Li Na Fu, Qi-Xiang Guo
A highly efficient alkenylation reaction of arylglyoxals with 3-vinylindoles catalyzed by chiral calcium phosphate is described. Structurally diverse allylic alcohols bearing indole and carbonyl units are prepared in excellent yields, good diastereoselectivities, and high to excellent enantioselectivities. These products are good building blocks for the synthesis of polysubstituted chiral tetrahydrocarbozol-2-ones. The mechanism study indicates that the most likely role of the catalyst is to activate the hydrate of arylglyoxal and control the stereoselectivity via desymmetric coordination...
February 17, 2017: Organic Letters
https://www.readbyqxmd.com/read/28212036/development-of-ion-conductive-and-vapoluminescent-porous-coordination-polymers-composed-of-ruthenium-ii-metalloligand
#7
Ayako Watanabe, Atsushi Kobayashi, Erika Saitoh, Yuki Nagao, Shun Omagari, Takayuki Nakanishi, Yasuchika Hasegawa, W M C Sameera, Masaki Yoshida, Masako Kato
We synthesized two new porous coordination polymers (PCPs) {Ln7(OH)5[Ru(dcbpy)3]4·4nH2O} (Ln7-Ru4; Ln = Ce, Nd) composed of the luminescent ruthenium(II) metalloligand [Ru(4,4'-dcbpy)3](4-) ([4Ru]; 4,4'-dcbpy = 4,4'-dicarboxy-2,2'-bipyridine) and lanthanide ions Ln(3+) (Ln = Ce, Nd). These two PCPs Ln7-Ru4 are isomorphous with the previously reported PCP La7-Ru4, and the lattice constants (a, c, and unit cell volume V) changed systematically according to the lanthanide contraction. All three Ln7-Ru4 compounds have OH(-) anion containing porous structures and a large number of hydrate water molecules within the pores, resulting in moderate ion conductivities (10(-6)-10(-7) S cm(-1)) at 90% relative humidity (RH) and 298 K...
February 17, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28212034/observation-of-the-global-dynamic-collectivity-of-a-hydration-shell-around-apomyoglobin
#8
Yangzhong Qin, Luyuan Zhang, Lijuan Wang, Dongping Zhong
Protein surface hydration is critical to its structural properties and biological activities. However, it is still unknown whether the hydration shell is intrinsically connected and how its fluctuations dynamically interact with protein motions. Here, by selecting five site-specific locations with distinctly different environments around apomyoglobin surface, we used a tryptophan scan with femtosecond fluorescence spectroscopy and simultaneously detected hydration-water dynamics and tryptophan sidechain relaxations with temperature dependence...
February 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28211928/facile-synthesis-of-stable-water-soluble-dendron-coated-gold-nanoparticles
#9
Alan E Enciso, Giovanni Doni, Riccardo Nifosì, Ferruccio Palazzesi, Roberto Gonzalez, Amy A Ellsworth, Jeffery L Coffer, Amy V Walker, Giovanni M Pavan, Ahmed A Mohamed, Eric E Simanek
Upon reduction with sodium borohydride, diazonium tetrachloroaurate salts of triazine dendrons yield dendron-coated gold nanoparticles connected by a gold-carbon bond. These robust nanoparticles are stable in water and toluene solutions for longer than one year and present surface groups that can be reacted to change surface chemistry and manipulate solubility. Molecular modeling was used to provide insight on the hydration of the nanoparticles and their observed solubilties.
February 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/28211911/three-dimensional-printing-of-calcium-sulfate-and-mesoporous-bioactive-glass-scaffolds-for-improving-bone-regeneration-in-vitro-and-in-vivo
#10
Xin Qi, Peng Pei, Min Zhu, Xiaoyu Du, Chen Xin, Shichang Zhao, Xiaolin Li, Yufang Zhu
In the clinic, bone defects resulting from infections, trauma, surgical resection and genetic malformations remain a significant challenge. In the field of bone tissue engineering, three-dimensional (3D) scaffolds are promising for the treatment of bone defects. In this study, calcium sulfate hydrate (CSH)/mesoporous bioactive glass (MBG) scaffolds were successfully fabricated using a 3D printing technique, which had a regular and uniform square macroporous structure, high porosity and excellent apatite mineralization ability...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211326/evaluation-of-in%C3%A2-vivo-and-in%C3%A2-vitro-toxicological-and-genotoxic-potential-of-aluminum-chloride
#11
Letícia Nazareth Fernandes Paz, Laís Mesquita Moura, Danielle Cristinne A Feio, Mirella de Souza Gonçalves Cardoso, Wagner Luiz O Ximenes, Raquel C Montenegro, Ana Paula N Alves, Rommel R Burbano, Patrícia Danielle L Lima
Aluminum and its compounds are common contaminants of water and food, as well as medications and cosmetics. The wide distribution of the element facilitates the demand for detailed studies of its biological and toxicological effects. This work aimed to evaluate the possible genotoxic and toxic activity resulting from in vivo and in vitro exposure to Al. For in vivo analysis, 40 Swiss mice were used, various concentrations of hydrated aluminum chloride were administered orally. They were analyzed for possible genic activity and metal cytotoxicity using a micronucleus test (MN), and for toxicity through histopathological evaluation of the extracted organs...
February 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28211063/gating-energetics-of-a-voltage-dependent-k-channel-pore-domain
#12
Greg Starek, J Alfredo Freites, Simon Bernèche, Douglas J Tobias
We used targeted molecular dynamics, informed by experimentally determined inter-atomic distances defining the pore region of open and closed states of the KvAP voltage-gated potassium channel, to generate a gating pathway of the pore domain in the absence of the voltage-sensing domains. We then performed umbrella sampling simulations along this pathway to calculate a potential of mean force that describes the free energy landscape connecting the closed and open conformations of the pore domain. The resulting energetic landscape displays three minima, corresponding to stable open, closed, and intermediate conformations with roughly similar stabilities...
February 16, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28210521/the-right-to-die-in-chronic-disorders-of-consciousness-can-we-avoid-the-slippery-slope-argument
#13
REVIEW
Rocco Salvatore Calabrò, Antonino Naro, Rosaria De Luca, Margherita Russo, Lory Caccamo, Alfredo Manuli, Alessia Bramanti, Placido Bramanti
Managing individuals with chronic disorders of consciousness raises ethical questions about the appropriateness of maintaining life-sustaining treatments and end-of-life decisions for those who are unable to make decisions for themselves. For many years, the positions fostering the "sanctity" of human life (i.e., life is inviolable in any case) have led to maintaining life-sustaining treatments (including artificial nutrition and hydration) in patients with disorders of consciousness, allowing them to live for as long as possible...
November 2016: Innovations in Clinical Neuroscience
https://www.readbyqxmd.com/read/28209893/localized-aliphatic-organic-material-on-the-surface-of-ceres
#14
M C De Sanctis, E Ammannito, H Y McSween, A Raponi, S Marchi, F Capaccioni, M T Capria, F G Carrozzo, M Ciarniello, S Fonte, M Formisano, A Frigeri, M Giardino, A Longobardo, G Magni, L A McFadden, E Palomba, C M Pieters, F Tosi, F Zambon, C A Raymond, C T Russell
Organic compounds occur in some chondritic meteorites, and their signatures on solar system bodies have been sought for decades. Spectral signatures of organics have not been unambiguously identified on the surfaces of asteroids, whereas they have been detected on cometary nuclei. Data returned by the Visible and InfraRed Mapping Spectrometer on board the Dawn spacecraft show a clear detection of an organic absorption feature at 3.4 micrometers on dwarf planet Ceres. This signature is characteristic of aliphatic organic matter and is mainly localized on a broad region of ~1000 square kilometers close to the ~50-kilometer Ernutet crater...
February 17, 2017: Science
https://www.readbyqxmd.com/read/28209636/a-randomized-crossover-trial-of-dietary-sodium-restriction-in-stage-3-4-ckd
#15
Rajiv Saran, Robin L Padilla, Brenda W Gillespie, Michael Heung, Scott L Hummel, Vimal Kumar Derebail, Bertram Pitt, Nathan W Levin, Fansan Zhu, Samer R Abbas, Li Liu, Peter Kotanko, Philip Klemmer
BACKGROUND AND OBJECTIVES: Patients with chronic kidney disease (CKD) are often volume expanded and hypertensive. Few controlled studies have assessed the effects of a sodium-restricted diet (SRD) in CKD. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We conducted a randomized crossover trial to evaluate the effect of SRD (target <2 g sodium per day) versus usual diet on hydration status (by bioelectrical impedance spectroscopy) and blood pressure (BP) between May of 2009 and May of 2013...
February 16, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28209540/in-vitro-characterization-of-ph-sensitive-azithromycin-loaded-methoxy-poly-ethylene-glycol-block-poly-aspartic-acid-graft-imidazole-micelles
#16
Fangfang Teng, Peizong Deng, Zhimei Song, Feilong Zhou, Runliang Feng, Na Liu
In order to improve azithromycin's antibacterial activity in acidic medium, monomethoxy poly (ethylene glycol)-block-poly (aspartic acid-graft-imidazole) copolymer was synthesized through allylation, free radical addition, ring-opening polymerization and amidation reactions with methoxy poly (ethylene glycol) as raw material. Drug loading capacity and encapsulation efficiency of azithromycin-loaded micelles prepared via thin film hydration method were 11.58±0.86% and 96.06±1.93%, respectively. The drug-loaded micelles showed pH-dependent property in the respects of particle size, zeta potential at the range of pH 5...
February 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28208688/the-impact-of-heat-exposure-and-sleep-restriction-on-firefighters-work-performance-and-physiology-during-simulated-wildfire-suppression
#17
Grace E Vincent, Brad Aisbett, Brianna Larsen, Nicola D Ridgers, Rod Snow, Sally A Ferguson
This study was designed to examine the effects of ambient heat on firefighters' physical task performance, and physiological and perceptual responses when sleep restricted during simulated wildfire conditions. Thirty firefighters were randomly allocated to the sleep restricted (n = 17, SR; 19 °C, 4-h sleep opportunity) or hot and sleep restricted (n = 13, HOT + SR; 33 °C, 4-h sleep opportunity) condition. Firefighters performed two days of simulated, intermittent, self-paced work circuits comprising six firefighting tasks...
February 12, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28208081/molecular-synergy-in-biolubrication-the-role-of-cartilage-oligomeric-matrix-protein-comp-in-surface-structuring-of-lubricin
#18
Akanksha Raj, Min Wang, Chao Liu, Liaquat Ali, Niclas G Karlsson, Per M Claesson, Andra Dėdinaitė
HYPOTHESIS: Synovial surfaces are lubricated by biomolecular aggregates that act in synergy, and lubricin is one key biolubricant. Its molecular structure allows extensive hydration and this is conducive to its lubrication performance. However, in order to fullfil its lubrication function it needs to be anchored and oriented on the surface in a proper way. We suggest that cartilage oligomeric matrix protein (COMP) is one of the biomolecules that promotes anchoring of lubricin in a fashion that facilitates lubrication...
February 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28205100/efficacy-of-oral-supplemental-hydration-for-the-prevention-of-contrast-induced-nephropathy-in-rats
#19
Tamaki Matsunami, Kazuo Hino, Rie Dosho, Sho Miyatake, Goro Ebisu, Ryohei Kuwatsuru
PURPOSE: To compare oral rehydration solution (ORS) with saline infusion for preventing contrast-induced nephropathy (CIN) in a rat model. MATERIALS AND METHODS: Adult male Sprague-Dawley rats (310-360 g) received intravenous indomethacin (10 mg/kg), N (G)-nitro-L-arginine methyl ester (10 mg/kg), and iohexol (10 mL/kg) to induce acute contrast-induced renal injury (CIN group); control rats received saline only. For hydration, rats received either continuous infusion (20 mL/kg/h) of saline or three oral doses (20 mL/kg each) of ORS...
February 15, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28204901/the-effect-of-hydration-status-on-the-measurement-of-lean-tissue-mass-by-dual-energy-x-ray-absorptiometry
#20
Clodagh M Toomey, William G McCormack, Phil Jakeman
PURPOSE: Athletes cycle between exercise and recovery. Exercise invokes changes in total body water from thermal sweating, muscle and hepatic glycogen depletion and metabolic water loss. Recovery from exercise results in rehydration, substrate repletion, and possible glycogen supercompensation. Such changes may corrupt the measurement of hydrated tissues, such as lean tissue mass (LTM), by dual-energy X-ray absorptiometry (DXA). The purpose of this study was to determine the effect of exercise and thermal dehydration and subsequent glycogen supercompensation on DXA-based measurement of body composition...
February 16, 2017: European Journal of Applied Physiology
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