Synthesis, Radioiodination and Biological distribution of 5-(5-(tributylstannyl) benzofuran-2-yl) pyridin-2-amine as an amyloid imaging agent
Published on: 26th December, 2017
OCLC Number/Unique Identifier: 7317576309
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.
Rapid determination of PCDDs, PCDFs and DL-PCBs in foods, feeding stuffs and vegetable oils using new modified acid silica
Published on: 5th January, 2023
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.
Search by University/Institution
Enter your University/Institution to find colleagues at HSPI.
Ensuring author's satisfaction with
- Friendly and hassle-free publication process
- Less production time of articles
- Constructive peer-review
- Enhancing journal reputation
- Regular feedback system
- Quick response to authors' queries
Most Viewed Keywords
- β-casein
- Thoracic outlet
- Radiology
- Cockroach
- Adult
- CO2 fixation
- SNAP
- Coronavirus
- Coronary angiography
- Clinical
- TCA: Traumatic corneal abrasion
- Van Hasselt
- Medical malpractice
- Mechanical neck pain
- Myomectomy
- Coronary artery disease
- Blood pressure monitoring device
- Caregivers’ nutritional awareness
- Heart failure
- Communication
Search Articles by Country
Get all latest articles in all Heighten Science Publications Inc journals by country.
Testmonials
I would like to thank this journal for publishing my Research Article. Something I really appreciate about this journal is, they did not take much time from the day of Submission to the publishing dat...
Ayush Chandra
I think that Heighpubs very good. You are very helpful. Thank you for everything.
Ana Ribeiro
“The choice to submit the forensic case study to the Journal of Addiction Therapy and Research was dictated by the match between the content and the potential readership. The publication process pro...
Ph.D, Boston University Department of Communicatio...
Elisabeth H. Wiig
We appreciate the fact that you decided to give us full waiver for the applicable charges and approve the final version. You did an excellent job preparing the PDF version. Of course we will consider ...
Anna Dionysopoulou
Your service is very good and fast reply, also your service understand our situation and support us to publication our articles.
Ayman M Abu Mustafa
To the editorial team at HSPI and the Journal of Clinical Nephrology: Thank you so much for your hard work and collaboration in bringing our article to life. Your staff was responsive, flexible, and ...
Alejandro Munoz
Thanks you and your colleague for the great help for our publication. You always provide prompt responses and high quality of service. I am so happy to have you working with me. Thanks again!
Diana (Ding) Dai
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
Thank you and your company for effective support of authors which are very much dependable on the funds gambling for science in the different countries of our huge and unpredictable world. We are doin...
Russia
Victor V Apollonov
Service and process were excellent as was the “look” of the article when published.