In this work an efficient method developed for the synthesis of 125I-benzofuran-2-yl) pyridin-2-amine (125IBPA), followed by radioiodination with 125I by using Chloramine-T at pH 8. The reaction proceeds within 10 min at room temperature (20-25°C). The radiochemical yield determined by Thin-Layer Chromatography (TLC) using hexane:ethyl acetate (1:6 v/v) and the purity analyzed by high-performance liquid chromatography using a reversed-phase RP18column and acetonitrile:0.1 M ammonium bicarbonate (pH 7.5) (1:1) as the mobile phase at a flow rate of 1 ml×min−1. The radiochemical yield using aH2O2 oxidant found equal to 96.5% with a radiochemical purity of 125I-BPA of over 96.5%. The biodistribution data in normal mice indicated a high initial uptake of 6.54±0.10 (% ID/g±SD) in the brain within 30 min post-injection. These results promote a further the use of 125I-BPA as a novel agent for brain imaging.
Polychlorinated dibenzo-p-dioxins, dibenzofurans and dioxin-like polychlorinated biphenyls are persistent organic pollutants (POPs), which in recent years received huge attention due to their extreme stability, high potential toxicity and bioaccumulation in food chains. The main source of human exposure to these compounds is discovered in foods of animal origin, especially foods rich in fat. The target of the present study was to set up an analytical method for the determination of PCDDs/PCDFs and DL-PCB in vegetable oils, sunflower meals, sunflower seeds, rapeseeds and milk powder. The first step consisted of a semi-automatic Soxhlet extraction for 3 hours, by using a mixture of Hexane: Acetone – 80:20, followed by acid digestion with 55% acid silica and filtration. After concentration, the extract is purified on a multilayer column (silica gel, silica-KOH, silica-H2SO4 anhydrous Na2SO4) followed by an alumina column separation in two fractions (first fraction containing PCDDs/PCDFs and second containing only PCBs). The purified extract was then analyzed by GC/MS/MS. The newly developed approach in our lab was capable to reduce the overall time of sample preparation to seven hours/ per sample. Since the method shows good mean recoveries for all labeled congeners spiked in the samples (for PCDDs/PCDFs – 80% - 110%, for DL-PCBs – 70% - 85%), we assumed the absence of overestimation or underestimation in the analyzed samples.
The service is nice and the time of processing the application is fast.
Department of Neurosurgery, Queen Elizabeth Hospit...
Long Ching
Your big support from researchers around the world is the best appreciation from your scientific teams. We believe that there should be no barrier in science and you make it real and this motto come ...
Arefhosseinir Rafi
Really good service with prompt response. Looking forward to having long lasting relationship with your journal
Avishek Bagchi
Thank you for your attitude and support. I am sincerely grateful to you and the entire staff of the magazine for the high professionalism and fast quality work. Thank you very much!
USA
Igor Klepikov
Publishing an article is a long process, but working with your publication department made things go smoothly, even though the process took exactly 5 months from the time of submitting the article til...
Anas Diab
I wanna to thank clinical journal of nursing care and practice for its effort to review and publish my manuscript. This is reputable journal. Thank you!
Wollo University, Ethiopia
Atsedemariam Andualem
Congratulations for the excellence of your journal and high quality of its publications.
Angel MARTIN CASTELLANOS
We really appreciate and thanks the full waiver you provide for our article. We happy to publish our paper in your journal. Thank you very much for your good support and services.
Ali Abusafia
Journal of Pulmonary and Respiratory Research is good journal for respiratory research purposes. It takes 2-3 weeks maximum for review of the manuscript to get published and any corrections to be made...
Divya Khanduja
I very much appreciate the humanitarian services provided in my stead by this journal/publisher.
It exhibits total absence of editorial impertinence. As an Author, I have been guided to have a fruitf...
HSPI: We're glad you're here. Please click "create a new Query" if you are a new visitor to our website and need further information from us.
If you are already a member of our network and need to keep track of any developments regarding a question you have already submitted, click "take me to my Query."