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79760

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Chamila Nimalaratne et al.
Food chemistry, 194, 111-116 (2015-10-17)
The aromatic amino acids and carotenoids are the major contributors to the antioxidant properties of egg yolk. This study aimed to evaluate the effect of simulated retail storage and domestic cooking on the antioxidant activity as well as on the
Wei-Yao Chang et al.
Journal of chromatography. A, 1248, 41-47 (2012-06-26)
A new one-step derivatization and microextraction technique was developed for the fluorometric determination of C(1)-C(8) linear aliphatic primary amines in complex sample solutions containing high levels of amino acids. In this method, amines were derivatized with o-phthalaldehyde (OPA) and 2-mercaptoethanol
Jessica Murphy et al.
Experimental gerontology, 69, 20-26 (2015-06-13)
Obesity and type 2 diabetes have been shown to alter the insulin sensitivity of glucose and protein metabolism in middle-aged women. We aimed to determine whether these findings translate to the elderly who are at increased risk of muscle loss.
I Molnár-Perl
Journal of chromatography. A, 913(1-2), 283-302 (2001-05-18)
An overview is presented of HPLC methods currently in use to determine amino acids as their o-phthaldialdyde derivatives in the presence of various SH-group-containing additives. Crucial points that proved to influence the stability of the amino acid OPA derivatives have
Atsuo Iwasawa et al.
Biocontrol science, 16(4), 165-170 (2011-12-23)
We investigated the bactericidal effects and cytotoxicity of an ortho-phthalaldehyde product in comparison with those of its predecessor glutaraldehyde products. Bactericidal effects ware examined on Mycobacterium terrae, a standard organism used for investigating the bactericidal effect of high-level disinfectants. Cytotoxicity
Yunfei Tu et al.
Se pu = Chinese journal of chromatography, 30(2), 184-189 (2012-06-12)
A method of precolumn derivatization-high performance liquid chromatography (HPLC) for the determination of theanine and gamma-aminobutyric acid (GABA) in tea was established. o-Phthalaldehyde (OPA) and N-acetyl-L-cysteine (NAC) were chosen as the derivatization reagents. The effects of teapolyphenol (Tp), proline (Pro)
Tiberiu Popescu et al.
Life sciences, 117(2), 75-83 (2014-10-07)
The study investigated the effects of the combined treatment Parecoxib (Pcox) and 5,10,15,20-tetra-sulphonato-phenyl-porphyrin(TSPP)-mediated photodynamic therapy on Walker 256 carcinosarcoma. Five groups of male Wistar rats were used: the control group, treated with TSPP, group 2, irradiated 24 h thereafter, group
Giuseppe Carlucci et al.
Biomedical chromatography : BMC, 29(6), 911-917 (2014-10-31)
A simple and sensitive method based on the combination of derivatization and high-performance liquid chromatography with ultraviolet and fluorimetric detection was developed for the simultaneous determination of octreotide and gabexate mesylate metabolite in human pancreatic juice samples. Parameters of the
A Vasanits-Zsigrai et al.
Journal of chromatography. A, 1394, 81-88 (2015-04-05)
Quantification, stability and unique spectroscopic properties of indolinyl-caged glutamates (ICGs), with the o-phthalaldehyde-3-mercaptopropionic acid (OPA-MPA) reagent, were described, at first. As new principle to the field, reactivity and stoichiometry of variously substituted OPA-MPA derivatized ICGs, such as 4-methoxy-7-nitroindolinyl-(MNI-Glu), 4-methoxy-5,7-dinitroindolinyl-(DNI-Glu), 2-dimethylamino-propoxy
Yi-Jhen Lai et al.
Talanta, 91, 103-109 (2012-03-01)
This study reports a selective and sensitive method for fluorescent detection of total, protein-bound, free, and free oxidized homocysteine (HCys) using tris(2-carboxyethyl)phosphine (TCEP) as a reducing agent, fluorosurfactant-capped gold nanoparticles (FSN-AuNP) as a preconcentrating probe, and o-phthaldialdehyde (OPA) as a
Qingyuan Dai et al.
Journal of agricultural and food chemistry, 63(16), 4179-4189 (2015-04-07)
A simple and green method was developed for preparing the stable biopolymer nanoparticles with pH and salt resistance. The method involved the macromolecular crowding Maillard process and heat-induced gelation process. The conjugates of whey protein isolate (WPI) and dextran were
Urszula Posadowska et al.
Acta of bioengineering and biomechanics, 17(3), 41-48 (2015-12-22)
Since there are more and more cases of multiresistance among microorganisms, rational use of antibiotics (especially their systemic vs. local application) is of great importance. Here we propose polymeric nanoparticles as locally applied gentamicin delivery system useful in osteomyelitis therapy.
Martina Sandberg Abelius et al.
Journal of reproductive immunology, 106, 100-109 (2014-07-23)
The immunological milieu in the placenta may be crucial for priming the developing foetal immune system. Early imbalances may promote the establishment of immune-mediated diseases in later life, including allergies. The initial exposure to allergens seems to occur in utero
Saravana Periaswamy Sivagnanam et al.
Marine drugs, 13(6), 3422-3442 (2015-06-04)
The bioactive materials in brown seaweeds hold great interest for developing new drugs and healthy foods. The oil content in brown seaweeds (Saccharina japonica and Sargassum horneri) was extracted by using environmentally friendly supercritical CO2 (SC-CO2) with ethanol as a
Jing Zhu et al.
Archives of microbiology, 197(3), 489-495 (2015-01-19)
Two Gram-staining-positive, aerobic, motile, endospore-forming, rod-shaped bacteria, designated strains Y24(T) and H9(T) were isolated from cold spring and carrot (Daucus L.) samples, respectively, in Xinjiang Uyghur Autonomous Region, north-western China. The taxonomic positions of the two new isolates were determined
Peter J Gilling et al.
BJU international, 112 Suppl 2, 69-73 (2013-10-30)
To compare the effectiveness, safety and cost of Tristel Fuse (chlorine dioxide) with Cidex OPA (ortho-phthaldehyde; 1,2-benzenedicarboxaldehyde) in an automated endoscopic reprocessor (AER) for high-level disinfection of flexible cystoscopes. A randomised single-blind study comparing the high-level disinfectants Tristel Fuse as
Lingman Ma et al.
Platelets, 26(4), 342-348 (2014-05-17)
I4 is a new synthetic anti-diabetes sulfonylurea compound. The aim of present study was to investigate the preventive effects and primary action mechanisms of I4 on platelet-mediated arterial thrombosis. Platelet aggregation and 5-hydroxytryptamine (5-HT) secretion ex vivo was detected. The
Vibhuti Mishra et al.
Environmental toxicology, 30(4), 472-482 (2013-11-20)
Organophosphates (OPs) pesticides are among the most toxic synthetic chemicals purposefully added in the environment. The common use of OP insecticides in public health and agriculture results in an environmental pollution and a number of acute and chronic poisoning events.
Rachana D Sharma et al.
Journal of pineal research, 59(2), 240-254 (2015-06-24)
Oxidative stress-induced methemoglobinemia remained an untouched area in venom pharmacology till date. This study for the first time explored the potential of animal venoms to oxidize hemoglobin to methemoglobin. In in vitro whole-blood assay, methemoglobin forming ability of venoms varied
Shaoxuan Yu et al.
Nanotechnology, 26(14), 145703-145703 (2015-03-19)
Selenium nanoparticles (Se NPs) possess well-known excellent biological activities and low toxicity, and have been employed for numerous applications except as inhibitors to protein glycation. Herein, the present study is carried out to investigate the inhibitory effect of Se NPs
Yanier Nuñez-Figueredo et al.
Neurochemistry international, 81, 41-47 (2015-01-27)
JM-20 (3-ethoxycarbonyl-2-methyl-4-(2-nitrophenyl)-4,11-dihydro-1H-pyrido[2,3-b][1,5]benzodiazepine) is a novel benzodiazepine dihydropyridine hybrid molecule, which has been shown to be a neuroprotective agent in brain disorders involving glutamate receptors. However, the effect of JM-20 on the functionality of the glutamatergic system has not been investigated.
Stéphane Mann et al.
Analytical biochemistry, 432(2), 90-96 (2012-10-17)
7,8-Diaminopelargonic acid (DAPA) aminotransferase is an enzyme of the biotin biosynthetic pathway that plays an essential role in Mycobacterium tuberculosis virulence. Inhibition of this enzyme is a potential strategy to combat this microorganism, the causative agent of tuberculosis. To identify
James McMasters et al.
The AAPS journal, 17(5), 1117-1125 (2015-06-14)
Peripheral artery disease is an atherosclerotic occlusion in the peripheral vasculature that is typically treated via percutaneous transluminal angioplasty. Unfortunately, deployment of the angioplasty balloon damages the endothelial layer, exposing the underlying collagen and allowing for the binding and activation
Sílvio Terra Stefanello et al.
International journal of nanomedicine, 10, 5663-5670 (2015-09-18)
Selenium compounds, such as diphenyl diselenide (DPDS), have been shown to exhibit biological activity, including antioxidant effects. However, the use of DPDS in pharmacology is limited due to in vivo pro-oxidative effects. In addition, studies have shown that DPDS-loaded nanocapsules
Yun-Bin Han et al.
Applied microbiology and biotechnology, 99(16), 6715-6726 (2015-02-17)
Sphingolipid ceramide N-deacylase (SCDase) catalyzes reversible reactions in which the amide linkage in glycosphingolipids is hydrolyzed or synthesized. While SCDases show great value for the enzymatic synthesis of glycosphingolipids, they are relatively poorly characterized enzymes. In this work, the enzymatic
Estefanía de Munck et al.
Environmental toxicology and pharmacology, 39(3), 1232-1245 (2015-05-24)
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by progressive muscle paralysis that reflects the motoneurons' degeneration. Several studies support the relationship between β-N-methylamino-l-alanine (l-BMAA), a neurotoxic amino acid produced by cyanobacteria and diatoms, and the sporadic occurrence of
Katsuhiro Suzuki et al.
Biomedical chromatography : BMC, 27(4), 535-538 (2012-09-29)
Monomethylarginine, asymmetric dimethylarginine and symmetric dimethylarginine were separated on a Wakopak Combi ODS with an acetonitrile-100 mm potassium phosphate buffer (pH 7.0; 1:1, v/v). Dimethylarginines were derived from o-phthalaldehyde for the fluorescence detector and from 6-ferrocenyl-1-hexanethiol for the electrochemical detector. The
Tomáš Roušar et al.
Analytical biochemistry, 423(2), 236-240 (2012-03-06)
Glutathione is an important tripeptide involved in a variety of cellular processes. Thus, precise knowledge of its levels is essential. Glutathione exists in two free forms-reduced and oxidized-and a number of methods exist to measure its levels. The aim of
Jin-Aa Oh et al.
Journal of chromatography. A, 1247, 99-103 (2012-06-12)
A simple high performance liquid chromatographic (HPLC) method and a highly sensitive gas chromatography mass spectrometric (GC-MS) method have been established for the determination of ortho-phthalaldehyde (OPA) in water. These methods are based on the derivatization of OPA with hydrazine
Benjamin D Bradford et al.
JAMA otolaryngology-- head & neck surgery, 139(6), 574-578 (2013-05-18)
If not adequately cleaned, rigid nasal endoscopes (RNEs) have the potential to cause iatrogenic cross-contamination. To test the efficacy of various disinfection methods in reducing bacterial load on RNEs in vitro. In vitro model. Staphylococcus aureus, Streptococcus pneumoniae, Pseudomonas aeruginosa
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