Part No: AN728Issued year: 2011File size: 0.15mbFile type: pdf
Cyclosporine (Figure 1) is an immunosuppressant drug most significantly used in post-operative organ transplants to reduce the chance of rejection of donor organs by decreasing the activity of the patient’s immune system. Subsequent to an organ transplant, patients are tested at regular intervals for the presence of very low levels of the compound. Cyclosporine is a cyclic non-ribosomal peptide of 11 amino acids and contains a single D-amino acid.
Cyclosporine, Cyclosporine, Immunosuppressant,
Part No: AN729Issued year: 2011File size: 0.18mbFile type: pdf
This application note describes an automated extraction procedure for the opiates, morphine and codeine from urine using ISOLUTE HCX and the RapidTrace Workstation.
Opiates, drug testing, DOA, Ion exchange
Part No: AN725Issued year: 2011File size: 0.16mbFile type: pdf
This application note describes an automated extraction procedure for Cocaine metabolite, Benzoylecgonine from urine using ISOLUTE HCX and RapidTrace Workstation.
Cocaine, BZE, Benzoylecgonine, drug testing, cocaine metabolite,
Part No: P092Issued year: 2014File size: 0.36mbFile type: pdf
The fermentation process associated with the manufacture of food grade enzyme powders was recently determined to support the colonization of bacteria. To control this issue, manufactures following different international regulatory procedures have found the addition of familiar antibiotic compounds to manufacturing processes beneficial. This becomes an issue of public health as the concentration of antibiotic residues in food grade materials promotes unknown exposure to the global community. Continued interest in the biomonitoring of these compounds have inspired a number of method development strategies; however, classic methods are labor intensive and require multi-step time consuming efforts. The FDA has recently mandated a method for the determination of chloramphenicol in shellfish. This study evaluates the feasibility of method modifications to incorporate enzyme powder matrices into this method. Linearity was determined over a range of 0.1 – 5 ng/mL (r^2 > 0.990). Relative recovery was determined >80%. The typical repeatability (%RSD) for n=7 replicates <20%. Strategies to control solids prior to SPE load will be presented as they were determined critical in method performance. Method robustness was determined by evaluating multiple lots and multiple variants of enzyme powder origin. The key variable is the nature of the excipients as high level sugars of different sources need to be controlled to minimize the ESI suppression.
Part No: P154Issued year: 2017File size: 0.47mbFile type: pdf
Part of the B complex group of water soluble vitamins, vitamin B7 (Biotin) is involved in various metabolic processes within the body. It is a small polar carboxylic acid which can present challenges in bioanalysis. This poster discusses the impact of optimization of various parts of the method development process to maximize
sensitivity allowing low level analysis of vitamin B7 from human serum.
MSACL 2017, Palm Springs
ASMS 2017, Indianapolis
Part No: Issued year: 2016File size: 2.34mbFile type: pdf
This poster describes a validated LC-MS/MS method for the quantification of nicotine, its metabolites: cotinine, trans-3’-hydroxycotinine, and the tobacco plant alkaloid anabasine in patient urine to determine their clinical utility for the evaluation of active smokers for pre-transplant eligibility.
Disclaimer: Publication of this poster in no way implies or construes endorsement of Biotage products by Emory University School of Medicine.
Part No: P146Issued year: 2016File size: 0.6mbFile type: pdf
This poster compares various sample preparation strategies for the extraction of MMA from serum without the necessity for derivatization, prior to LC-MS/MS analysis. A range of extraction techniques of varying complexity were evaluated: protein precipitation, phospholipid depletion, supported liquid extraction and solid phase extraction using both silica and polymer-based mixed-mode anion exchange chemistries. Method performance was evaluated for evaporative effects, assay recovery, ion suppression, phospholipid removal and simplicity of transfer to an automated sample preparation platform.
Part No: P006Issued year: File size: 0.09mbFile type: pdf
The formation of 2,5-diketopiperazines from a water suspension of N-Boc protected dipeptide alkyl esters or dipeptide alkyl esters was induced by microwave assisted heating (Scheme 1). The products, which precipitated, were obtained in good yields. However, epimerisation/diastereomer formation was found to various extents depending on the amino acid sequence and the applied reaction temperature.
Part No: AN111Issued year: 2015File size: 1.19mbFile type: pdf
The cyclic peptide mupain-1 (CPAYSRYLDC) is an inhibitor of the cancer-related urokinase-type plasminogen activator. Here we show the synthesis of a non-natural arginine building block precursor using MAOS.
Part No: AN110Issued year: 2015File size: 0.72mbFile type: pdf
PNA oligomers have interesting properties such as their increased thermal and chemical stability and resistance to enzymatic degradation which drives their use in various molecular biology, molecular diagnostic, microarray, biosensor and antisense applications. In this study we synthesize two PNA oligomers on a small scale using the Biotage® Initiator+ Alstra™ microwave peptide synthesizer.
Part No: Issued year: 2004File size: 0.09mbFile type: pdf
Solid-Assisted Solution Phase Synthesis (SASPS) is a technique where the target molecule is synthesized in solution and solid-supported molecules are used as reagents, catalysts or scavengers. Recently this technique has been getting a lot of attention as an alternative to solid phase organic synthesis (SPOS), since it offers many of the advantages of SPOS in terms of ease of reaction workup and product purification in addition to the advantages associated with traditional solution-phase chemistry (e.g. the ease of monitoring the progress of the reaction by simply applying LC-MS or TLC techniques).
Part No: P043Issued year: File size: 0.31mbFile type: pdf
The application of microwave irradiation in solid
phase peptide synthesis (SPPS), is an important tool
for the synthesis of difficult and long peptide
sequences that are often obtained in poor quality by
comparable conventional methods at room
temperature. Here we present the results obtained
for the synthesis of a number of difficult peptide
sequences using different levels of automation for
microwave assisted SPPS: manual, semi-automated
and fully automated systems. Syro wave, initiator, sp wave
Part No: PPS449Issued year: 2017File size: 0.61mbFile type: pdf
Migrate from mg to g Without Reoptimization. Biotage high precision reaction vials are engineered for durability and safe reactions. All vials withstand 30 bar pressures in a wide range of conditions. Designed for use with Biotage® Initiator+ and Initiator microwave synthesizers.
Speeding up reactions has never been easier. Biotage microwave
synthesizers are the first-choice tools for organic chemists who
need to accelerate their production of new compounds.
Initiator, Initiator+, robot, vials, phase separator, work up tools
Part No: SS-INT.R 0611Issued year: 2011File size: 1.28mbFile type: pdf
The 60-position sample bed supports the production of focused libraries, multi-user environments and scale-out. Flexible operation enables the use of both large and small vials in combination at any time and in any order without manual intervention.