Vnmrs 500

Manufactured by Agilent Technologies

Sourced in United States

The VNMRS-500 is a nuclear magnetic resonance (NMR) spectrometer manufactured by Agilent Technologies. It is designed to analyze the chemical structure and composition of samples through the detection and interpretation of radio frequency signals emitted by the nuclei of atoms within the sample when placed in a strong magnetic field.

Automatically generated - may contain errors

Lab products found in correlation

34 protocols using vnmrs 500

Urinary NMR Metabolomics in Interstitial Cystitis

Cited 1 time

Check if the same lab product or an alternative is used in the 5 most similar protocols

The NMR data in urine samples from
IC patients and healthy subjects were preprocessed as previously described.^{13 (link)} We excluded one subject from the IC patient
group and three subjects from the control group because their spectra
were outliers based on PCA analysis. Fourier transformation and phase
and baseline correction of the time domain data were manually performed.
The resulting frequency domain data were binned at a 0.002 ppm interval.
The signals were normalized against total integration values and 0.025%
TSP. The region corresponding to water (4.6–5.0 ppm) was removed
from all spectra. Data pretreatment including baseline correction,
chromatogram alignment, time-window setting, hierarchical multivariate
curve resolution, H-MCR, and normalization were performed in MATLAB
(version 7.3) using custom scripts. Identification of detected NMR
spectra was performed using VNMRS500 (Varian Inc.). The metabolites
were identified by a database search, based on spectra and chromatographic
retention index, using Chenomx (spectral database; Edmonton, Alberta,
Canada) by fitting the experimental spectra to those in the database.

Wen H., Lee T., You S., Park S.H., Song H., Eilber K.S., Anger J.T., Freeman M.R., Park S, & Kim J. (2014). Urinary Metabolite Profiling Combined with Computational Analysis Predicts Interstitial Cystitis-Associated Candidate Biomarkers. Journal of Proteome Research, 14(1), 541-548.

+ Open protocol

+ Expand

Iridium-Catalyzed C-H Sulfonation of Heterocycles

Check if the same lab product or an alternative is used in the 5 most similar protocols

All synthetic procedures were performed under nitrogen either in a Vacuum Atmospheres glovebox or in a closed reactor. Acetophenone, 4-toluenesulfonyl chloride, 4-fluorobenzenesulfonyl chloride, 2-picolylamine, [Cp*IrCl₂]₂, potassium tert-butoxide, formic acid (97%), and NaHCO₃ were purchased from common vendors and used without further purification. NMR solvents (CD₂Cl₂, CDCl₃, and C₆D₆), 2-propanol, and triethylamine were dried and distilled over CaH₂. Hexane and CH₂Cl₂ were dried using a solvent purification system.
¹H, ¹³C, and ¹⁹F NMR spectra were acquired on Varian Mercury 400, VNMRS-500, and VNMRS-600 spectrometers and processed using MestReNova 12.0.1. All chemical shifts are reported in ppm and referenced to the residual ¹H or ¹³C solvent peaks. Following abbreviations are used: (s) singlet, (bs s) broad singlet, (d) doublet, (t) triplet, (dd) doublet of doublets, etc. NMR spectra of all metal complexes were taken in 8” J. Young tubes (Wilmad or Norell) with Teflon valve plugs. MALDI-MS spectra were acquired on Bruker Autoflex Speed MALDI Mass Spectrometer. X-ray crystallography data were obtained on a Bruker APEX DUO single-crystal diffractometer equipped with an APEX2 CCD detector, Mo fine-focus and Cu micro-focus X-ray sources. IR spectra were obtained using Jasco FT/IR-4600 FT-IR Spectrometer.

Demianets I., Cherepakhin V., Maertens A., Lauridsen P.J., Sharada S.M, & Williams T.J. (2020). A New Mechanism of Metal-Ligand Cooperative Catalysis in Transfer Hydrogenation of Ketones. Polyhedron, 182, 114508.

+ Open protocol

+ Expand

NMR Spectroscopy at Wayne State

Check if the same lab product or an alternative is used in the 5 most similar protocols

NMR spectra were acquired on a Varian VNMRS-500 (499.48 MHz, 11.7 T) in the Lumigen Instrument Center in the Chemistry Department at Wayne State University.

Ekanger L.A., Mills D.R., Ali M.M., Polin L.A., Shen Y., Haacke E.M, & Allen M.J. (2016). Spectroscopic Characterization of the +3 and +2 Oxidation States of Europium in a Macrocyclic Tetraglycinate Complex. Inorganic chemistry, 55(20), 9981-9988.

+ Open protocol

+ Expand

Comprehensive Spectroscopic Analysis

Check if the same lab product or an alternative is used in the 5 most similar protocols

Absorption spectra were recorded using
a Hitachi U-2800 UV–vis–NIR spectrophotometer. Luminescence
spectra were recorded using a PTI QuantaMaster spectrofluorometer
using 1 cm × 1 cm quartz cuvettes and corrected for detector
sensitivity. ¹H NMR and ¹³C NMR spectra were
recorded on a Varian VNMRS 500 instrument at 500 and 126 MHz, respectively.
Electrospray ionization (ESI) mass spectra were measured on a Thermo
Scientific Exactive Orbitrap.

Greene L.E., Lincoln R., Krumova K, & Cosa G. (2017). Development of a Fluorogenic Reactivity Palette for the Study of Nucleophilic Addition Reactions Based on meso-Formyl BODIPY Dyes. ACS Omega, 2(12), 8618-8624.

+ Open protocol

+ Expand

Spectroscopy and NMR Characterization

Check if the same lab product or an alternative is used in the 5 most similar protocols

The spectroscopy method conditions were the same as those previously published [4 (link)]. The NMR spectra were recorded at 298 K on a Varian VNMRS-500 or Varian VNMRS-600 spectrometer equipped with a 5-mm Z-SPEC Nalorac IDG 500-5HT gradient probe or a 5-mm PFG AutoXID (1H/X15N-31P) probe, respectively.

Zmysłowski A., Sitkowski J., Bus K., Michalska K, & Szterk A. (2021). Synthesis of Oxidized 3β,3′β-Disteryl Ethers and Search after High-Temperature Treatment of Sterol-Rich Samples. International Journal of Molecular Sciences, 22(19), 10421.

+ Open protocol

+ Expand

Characterization of Organic Compounds by NMR and MS

Check if the same lab product or an alternative is used in the 5 most similar protocols

All chemicals were purchased from commercial suppliers and were used as received unless otherwise stated. Proton Nuclear Magnetic Resonance NMR (¹H NMR) spectra and carbon nuclear magnetic resonance (¹³C NMR) spectra were recorded on a Varian Unity Plus 400, Varian MR400, Varian vnmrs 500, Varian Inova 500, Varian Mercury 500, and Varian vnmrs 700 spectrometers. Chemical shifts for protons are reported in parts per million and are references to the NMR solvent peak (CDCl₃: δ 7.26). Chemical shifts for carbons are reported in parts per million and are referenced to the carbon resonances of the NMR solvent (CDCl₃: δ 77.23). Data are represented as follows: chemical shift, multiplicity (br = broad, s = singlet, d = doublet, t = triplet, q = quartet, dq = doublet of quartet, ddq = doublet of doublet of quartet, p = pentet, dd = doublet of doublet, ddd = doublet of doublet of doublet, hept = heptet, m = multiplet), coupling constants in Hertz (Hz) and integration. Mass spectroscopic (MS) data was recorded at the Mass Spectrometry Facility at the Department of Chemistry of the University of Michigan in Ann Arbor, MI on an Agilent Q-TOF HPLC-MS with ESI high resolution mass spectrometer. Infrared (IR) spectra were obtained using either an Avatar 360 FT-IR or Perkin Elmer Spectrum BX FT-IR spectrometer. IR data are represented as frequency of absorption (cm⁻¹).

McAtee C.C., Ellinwood D.C., McAtee R.C, & Schindler C.S. (2018). Functionalized Cyclopentanes via Sc(III)-Catalyzed Intramolecular Enolate Alkylation. Tetrahedron, 74(26), 3306-3313.

+ Open protocol

+ Expand

Spectroscopic Characterization of Molecular Structures

Check if the same lab product or an alternative is used in the 5 most similar protocols

For structure elucidation ¹H, ¹³C, gCOSY, gNOESY, gHSQC and gHMBC NMR spectra were acquired on an Bruker Avance III HD 800 MHz, on a Varian VNMR-S 500 or a Varian 400 MR spectrometer. The spectra were processed using the MestReNova (v9.0.0) software. Chemical shifts were referenced indirectly to tetramethylsilane via the residual solvent signal (CHCl₃, ¹H at 7.26 ppm and ¹³C at 77.16 ppm). LC(ESI)MS spectra was acquired on a PE SCIEX API 150EX instrument (Perkin Elmer, Waltham, MA, USA) equipped with a Turbolon spray ion source (30 eV ionization energy) and a Gemini 5 mmC-18 110 Å HPLC column, using water:acetonitrile gradient (80:20 to 20:80).

Irungu B.N., Adipo N., Orwa J.A., Kimani F., Heydenreich M., Midiwo J.O., Martin Björemark P., Håkansson M., Yenesew A, & Erdélyi M. (2015). Antiplasmodial and cytotoxic activities of the constituents of Turraea robusta and Turraea nilotica. Journal of Ethnopharmacology, 174, 419-425.

+ Open protocol

+ Expand

Analytical Techniques for Chemical Characterization

Check if the same lab product or an alternative is used in the 5 most similar protocols

Chemicals were used without any further purification and purchased from common suppliers. Geduran silica gel 60A was generally used as stationary phase for column chromatography, where necessary. A HPMS 6890-5973 MSD spectrometer was used for mass spectrometry analyses equipped with a HP ChemStation or with an Agilent LC–MS 1100 Series. For exact mass analyses, in particular, we employed an LC–MSD Trap System VL spectrometer equipped with electrospray ionization (ESI). Nuclear Magnetic Resonance (NMR) spectra were recorded in the specific deuterated solvent (as indicated in each procedure) using Agilent VNMRS500 or Varian Mercury 300 NMR instruments. Chemical shifts (δ) are reported as parts per million (ppm) and coupling constants (J) in Hertz (Hz). A selection of spectra was reported in the Supplementary Material File (Figure S1). Melting points of solid compounds (uncorrected) were determined in open capillaries on a Gallenkamp electrothermal apparatus. The purity of all tested compounds, based on the panel of analyses performed was estimated as >95%.

Carocci A., Barbarossa A., Leuci R., Carrieri A., Brunetti L., Laghezza A., Catto M., Limongelli F., Chaves S., Tortorella P., Altomare C.D., Santos M.A., Loiodice F, & Piemontese L. (2022). Novel Phenothiazine/Donepezil-like Hybrids Endowed with Antioxidant Activity for a Multi-Target Approach to the Therapy of Alzheimer’s Disease. Antioxidants, 11(9), 1631.

+ Open protocol

+ Expand

NMR Characterization of Dendrimers

Check if the same lab product or an alternative is used in the 5 most similar protocols

NMR experiments
were performed on Varian VNMRS 500 and Varian MR400 instruments. ¹H NMR spectra were obtained used 10 s preacquisition delays
and a total of 64 scans. All sample solutions were set to a dendrimer
concentration of 5 mg/mL in deuterium oxide.

van Dongen M.A., Rattan R., Silpe J., Dougherty C., Michmerhuizen N.L., Van Winkle M., Huang B., Choi S.K., Sinniah K., Orr B.G, & Banaszak Holl M.M. (2014). Poly(amidoamine) Dendrimer–Methotrexate Conjugates: The Mechanism of Interaction with Folate Binding Protein. Molecular Pharmaceutics, 11(11), 4049-4058.

+ Open protocol

+ Expand

Synthesis of Halogenated Organic Compounds

Check if the same lab product or an alternative is used in the 5 most similar protocols

All reagents and solvents were purchased from Sigma Aldrich, TCI or Oakwood Chemical and were used directly as received. Reaction products were purified by flash chromatography using the ISCO CombiFlash® Rf+ Lumen. ¹H, ¹³C, and ¹⁹F NMR spectra were obtained on Varian 400‐MR, VNMRS‐500, or VNMRS‐600 spectrometers. NMR spectra were processed with MestReNova 9.0.0 or 11.0.2. Multiplicities are quoted as singlet (s), doublet (d), triplet (t), unresolved multiplet (m), doublet of doublets (dd), doublet of doublet of doublets (ddd), doublet of triplets (dt), triplet of doublets (td), and broad (b). All chemical shifts (δ) are reported in parts per million (ppm) relative to residual CD₂HOD in CD₃OD (δ 3.34, ¹H NMR), CHCl₃ in CDCl₃ (δ 7.26, ¹H NMR) and CFCl₃ (δ 0.00, ¹⁹F NMR). Mass spectrometry was performed on a Finnigan LCQ Deca XP Max. Mass spectral data were calculated using ChemDraw 19.1.21. Isotopic mass for compounds containing a bromine atom was calculated for ⁸¹Br. Compound IUPAC names were assigned by MarvinSketch 20.3.

Zhou Y., Overhulse J.M., Dupper N.J., Guo Y., Kashemirov B.A., Wei K., Govin J., Petosa C, & McKenna C.E. (2022). Toward more potent imidazopyridine inhibitors of Candida albicans Bdf1: Modeling the role of structural waters in selective ligand binding. Journal of Computational Chemistry, 43(32), 2121-2130.

+ Open protocol

+ Expand

About PubCompare

Our mission is to provide scientists with the largest repository of trustworthy protocols and intelligent analytical tools, thereby offering them extensive information to design robust protocols aimed at minimizing the risk of failures.

We believe that the most crucial aspect is to grant scientists access to a wide range of reliable sources and new useful tools that surpass human capabilities.

However, we trust in allowing scientists to determine how to construct their own protocols based on this information, as they are the experts in their field.

Ready to get started?

Revolutionizing how scientists
search and build protocols!