Intracellular calcium concentration in biological cells varies from 0.1 to 10 muM depending upon cell signaling and disease states. A direct estimate of calcium concentration in cell tissues within this range is possible with a novel calcium-selective reagent 15C5-774. The molecule of 15C5-774 consists of a near-infrared (NIR) chromophore (lambda(max)=774 nm) and a metal complexing moiety of benzo-15-crown-5. The reagent shows a strong calcium binding affinity in a 1:1 ratio and metal selectivity in the order Ca(2+)>Mg(2+)>Sr(2+) approximately K(+) approximately Na(+)>Zn(2+)>Li(+). The high sensitivity is achieved by conducting absorption measurements in the NIR region where background interference from the biological matrix is low.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0039-9140(01)00641-5 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Impact of musical rhythm on blood, physiological and welfare parameters in stabled horses.
Sci Rep
December 2024
School of Agricultural Science (FCA), Federal University of Grande Dourados (UFGD), Dourados, MS, 79824-900, Brazil.
The aim of this study was to evaluate the effects of two styles of classical music, based on different tempos (BPM), on the physiological and blood parameters of horses during social isolation and restriction of movements. First experiment was carried out using nine horses of no defined breed, distributed in Control, Slow-tempo music and Moderate-tempo music .For social isolation and restriction of movement, the animals were housed daily in individual stalls for two hours and exposed to the stimuli for 60 min, and eye temperature, heart rate, and respiratory rate were assessed.
View Article and Find Full Text PDFImpact of late-stage hypoxic stimulation and layer breeder age on embryonic development, hatching and chick quality.
Poult Sci
December 2024
Laboratory of Regional Center of Excellence for Poultry Science, University of Lomé, 01 BP 1515, Lomé, Togo.
The present study examined the effects of breeder age and oxygen (O₂) concentrations during the late chorioallantoic membrane (CAM) growth stage on embryo development, hatching dynamics, chick quality, bone mineralization and hatchability. A total of 1200 eggs from 33- and 50-week-old ISA layer breeders, weighing 53.85 g and 60.
View Article and Find Full Text PDF[A comparative assessment of neurochemical and neurophysiological parameters of cardiac surgery patients who underwent different versions of multitasking cognitive training].
Zh Nevrol Psikhiatr Im S S Korsakova
December 2024
Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russia.
Objective: To compare biomarkers of neurovascular unit (NVU) - S100β, NSE, BDNF and indicators of the brain electrical activity in patients who underwent coronary artery bypass grafting (CABG) depending on the use of different versions of multi-tasking cognitive training (CT).
Material And Methods: The study included 89 people, of whom 47 completed the CTI (postural and three cognitive tasks (counting backwards, verbal fluency and the open-ended task «Unusual use of an ordinary object») and 42 patients, who underwent CTII (visuomotor reaction and the same cognitive tasks) in the early postoperative CABG period. The patients of both groups underwent complex testing of psychomotor, executive functions, attention, short-term memory and EEG study in the perioperative period of CABG.
Kinetics and mechanism of gallic acid as an ecofriendly corrosion inhibitor for steel rebars in mortar.
Sci Rep
December 2024
Corrosion and Surface Engineering CSIR, National Metallurgical Laboratory, Jamshedpur, India.
Chloride-induced corrosion of steel rebars embedded in mortar was effectively controlled by blending of gallic acid in wet mixture. Mixing of optimized concentration of gallic acid (GA) inhibitor (0.125%) in mortars considerably increased the charge transfer resistance of embedded rebars (80.
View Article and Find Full Text PDFCitric acid is more effective than sodium thiosulfate in chelating calcium in a dissolution model of calcinosis.
Sci Rep
December 2024
Division of Musculoskeletal and Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester and Northern Care Alliance NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK.
Calcinosis cutis affects 20-40% of patients with systemic sclerosis. This study tests the hypothesis that calcium-chelating polycarboxylic acids can induce calcium dissolution without skin toxicity or irritancy. We compared citric acid (CA) and ethylenediaminetetraacetic acid (EDTA) to sodium thiosulfate (STS) for their ability to chelate calcium in vitro using a pharmaceutical dissolution model of calcinosis (hydroxyapatite (HAp) tablet), prior to evaluation of toxicity and irritancy in 2D in vitro skin models.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!