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300 ultrashield

Manufactured by Bruker
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The Bruker 300 Ultrashield is a compact high-resolution nuclear magnetic resonance (NMR) spectrometer. It is designed to provide high-quality NMR data for a variety of applications.

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Lab products found in correlation

Avance 3 500 mhz, by Bruker (3 mentions) Triple quadrupole mass spectrometer, by Waters Corporation (2 mentions) Mestrenova, by Bruker (2 mentions) Am 400, by Bruker (1 mentions) Micromass quattro micro api, by Waters Corporation (1 mentions) Iraffinity 1, by Shimadzu (1 mentions) Silica gel, by Merck Group (1 mentions) Aluminium backed sheets, by Merck Group (1 mentions) Affinity 1, by Shimadzu (1 mentions) Rp 18 f254, by Merck Group (1 mentions) Combiflash system, by Teledyne (1 mentions) Ascend 600, by Bruker (1 mentions) Nicolet is50 ftir spectrometer, by Thermo Fisher Scientific (1 mentions) Db 5 0.25 mm capillary column, by Techcomp Instruments (1 mentions) Ascend 400, by Bruker (1 mentions) Nicolet is 50 fourier transform spectrophotometer, by Thermo Fisher Scientific (1 mentions)

Close spelling variants of this product

Ultrashield 300 MHz (7 citations) Ultrashield 300 spectrometer (7 citations) Ultrashield 300 MHz spectrometer (4 citations) Ultrashield 300 Avance III spectrometer (3 citations) Ultrashield 300 Advance III spectrometer (3 citations) 300 Ultrashield equipment (2 citations) 300 Ultrashield instrument (2 citations) 300 MHz UltraShield NMR (2 citations)

17 protocols using 300 ultrashield

1

Photooxidative Synthesis of Naphthyl Amines

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Suspensions of 1,5-dihydroxynaphthalene (1; 1.25 mmol), rose bengal (20 mg; 0.02 mmol), and water (150 mL) were exposed to green LEDs for 5 h while a gentle stream of air was bubbled through the solution. Thereafter, phenylamines 3 (1.5 mmol) were added and the solutions were stirred for 4 h at room temperature (RT). Work-up of the reaction mixtures followed by column chromatography over silica gel (3 : 1 petroleum ether/ethyl acetate) provided pure compounds 4–15 (Scheme 1; Figure 1).
All reagents were of commercial quality and used without further purification. The melting points were measured in a Stuart Scientific SMP3 equipment. The IR spectra were obtained in a vector 22-FT Bruker spectrophotometer using KBr disks, and wavelengths are expressed in cm−1. Proton nuclear magnetic resonance (1H NMR) spectra were measured at 400 and 300 MHz in a Bruker AM-400 and Ultrashield-300 spectrometers. Chemical shifts are expressed in ppm using TMS as an internal reference (δ scale), and (J) coupling constants are expressed in hertz (Hz). Carbon-13 nuclear magnetic resonance (13C NMR) spectra were measured at 100 and 75 MHz in a Bruker AM-400 and Ultrashield-300, spectrometers. Silica gel (70–230 and 230–400 mesh) and TLC on aluminum foil 60 F254-supported silica (Merck, Darmstadt) were used for the chromatography analytical columns and TLC, respectively.
Benites J., Toledo H., Salas F., Guerrero A., Rios D., Valderrama J.A, & Calderon P.B. (2018). In Vitro Inhibition of Helicobacter pylori Growth by Redox Cycling Phenylaminojuglones. Oxidative Medicine and Cellular Longevity, 2018, 1618051.
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2

Nuclear Magnetic Resonance Measurements

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NMR measurements were performed on a Bruker 300 UltrashieldTM (Bruker, Billerica, United States) or on Avance III 500 MHz Bruker (Bruker, Billerica, United States). All measurements were performed at room temperature, and spectra were processed and analyzed using TopSpin software.
Zagorodko O., Melnyk T., Rogier O., Nebot V.J, & Vicent M.J. (2021). Higher-order interfiber interactions in the self-assembly of benzene-1,3,5-tricarboxamide-based peptides in water. Polymer Chemistry, 12(23), 3478-3487.
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3

Synthesis and Characterization of Compounds

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Synthesis of compounds: Compounds were synthesized using an approach previously described. [21] (link) The detailed procedures and full characterization of intermediate and final products are given in the Supporting Information.
Elemental analysis: Elemental analyses (C, H, N) were performed on a Vario Micro cube Elementar Analyser. Elemental analysis of chlorine was performed on TX 6000 Total Chlorine Analyzer.
NMR spectroscopy: NMR measurements were performed on a Bruker 300 Ultrashield TM (Bruker, Billerica, USA) or Avance III 500 MHz Bruker (Bruker). All measurements were performed at room temperature, and spectra were processed and analyzed by using TopSpin and MestreNova software.
Zagorodko O., Melnyk T., Nebot V.J., Dankers P.Y.W, & Vicent M.J. (2024). An Offset Patterned Cross-β Structure in Assemblies of C3 -Symmetric Peptide Amphiphiles. Chemistry (Weinheim an der Bergstrasse, Germany), 30(7).
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4

NMR Spectroscopic Analysis of Samples

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Nuclear magnetic resonance (NMR) spectra were recorded at 27°C (300 K) on a 300 Ultrashield from Bruker. Data were processed with Mestrenova software. Sample solutions were prepared at the desired concentration in D2O or D2O supplemented with NaHCO3 (0.5 mol/L).
Lepland A., Malfanti A., Haljasorg U., Asciutto E.K., Pickholz M., Bringas M., Đorđević S., Salumäe L., Peterson P., Teesalu T., Vicent M.J, & Scodeller P. (2022). Depletion of Mannose Receptor–Positive Tumor-associated Macrophages via a Peptide-targeted Star-shaped Polyglutamate Inhibits Breast Cancer Progression in Mice. Cancer Research Communications, 2(6), 533-551.
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5

NMR and Mass Spectrometry Analysis

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All solvents were dried according to publish methods and distilled prior to use. Other reagents obtained from commercial suppliers were used without further purification. Low-resolution mass spectrometry was performed in a Triple Quadrupole mass spectrometer (Micromass Quattro Micro API, Waters). NMR spectra were recorded on a Bruker 300 Ultra-Shield instrument (1H 300 MHz, 13C 75 MHz). 1H and 13C NMR chemical shifts are expressed in δ (ppm), referenced to CDCl3 solvent, with the corresponding proton coupling constants (J) in Hertz (Hz). NMR spectra were assigned using appropriate DEPT, COSY, HSQC, and HMBC sequences. Column chromatography was performed on silica gel (Merck 9385). TLC was performed on precoated Merck silica gel 60 F254 plates, with visualization under UV light (λ 254 and 366 nm) and by spraying either with Dragendorff’s reagent or a solution of H2SO4-MeOH (1:1), followed by heating.
Cardoso D.S., Szemerédi N., Spengler G., Mulhovo S., dos Santos D.J, & Ferreira M.J. (2021). Exploring the Monoterpene Indole Alkaloid Scaffold for Reversing P-Glycoprotein-Mediated Multidrug Resistance in Cancer. Pharmaceuticals, 14(9), 862.
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6

Synthesis and Characterization of HNE Inhibitors

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The HNE inhibitors were synthesized according to the literature [21 (link),24 (link),26 (link)]. The synthesized compounds were characterized by NMR techniques, FTIR and mass spectrometry, elemental analysis and melting point as described in the Supplementary Materials.
Chemical reactions were followed by thin layer chromatography (TLC) using Merck aluminium backed sheets coated with 60 F254 silica gel and visualized under a UV lamp or revealed using iodine, potassium permanganate and vanillin. Compound purification was obtained by flash chromatography using silica gel (0.040–0.063 mm) from Merck (Darmstadt, Germany).
NMR experiments were performed on a Bruker 300 ultra-Shield (Bruker, Massachusetts, NE, USA) (1H 300 MHz; 13C 75 MHz) in chloroform-d or acetone-d6. All chemical shifts (δ) were quoted in ppm scale and coupling constants (J) in Hz, and multiplicity was described with the following abbreviations: s = singlet, d = doublet, t = triplet, m = multiplet.
FTIR spectra were obtained using a IRAffinity-1 (Shimadzu, Kyoto, Japan). Each compound was previously blended with potassium bromide and pressed with a hydraulic press until a pellet was formed.
Melting points (m.p.) were determined using a Bock-Monoscop (Kofler, Berlin, Germany).
The Log P was predicted using the ALOGPS 2.1 program [36 ].
Nunes A., Marto J., Gonçalves L.M., Simões S., Félix R., Ascenso A., Lopes F, & Ribeiro H.M. (2020). Novel and Modified Neutrophil Elastase Inhibitor Loaded in Topical Formulations for Psoriasis Management. Pharmaceutics, 12(4), 358.
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7

Spectroscopic Analysis of Chemical Compounds

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The NMR spectra were recorded on a Bruker 300 Ultra-Shield instrument (1H 300 MHz, 13C 75 MHz). 1H and 13C chemical shifts are expressed in δ (ppm) referenced to the solvent used and the proton coupling constants J are in hertz (Hz). Optical rotations were performed using a PerkinElmer 241 polarimeter, with quartz cells of 1 dm path length. The infrared spectra were collected on an Affinity-1 (Shimadzu, Kyoto, Japan) FTIR spectrophotometer. Low-resolution mass spectrometry was conducted with a Triple Quadrupole mass spectrometer Waters AcquityTM (Waters®, Ireland). Column chromatography (CC) was performed on silica gel (Merck 9385, Darmstadt, Germany) or Combiflash system (teledyne-Isco; Lincolm, NE, USA), using SiO2 or C18 prepacked columns. Analytical thin-layer chromatography (TLC) was performed on pre-coated silica gel 60 F254 and RP-18 F254 plates (Merck 105,554 and 105,560, respectively), with visualization under UV light (λ 254 and 366 nm), and by spraying either with Dragendorff′s reagent or a solution of H2SO4–MeOH (1:1), followed by heating.
Sancha S.A., Gomes A.V., Loureiro J.B., Saraiva L, & Ferreira M.J. (2022). Amaryllidaceae-Type Alkaloids from Pancratium maritimum: Apoptosis-Inducing Effect and Cell Cycle Arrest on Triple-Negative Breast Cancer Cells. Molecules, 27(18), 5759.
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8

NMR Quantification of Cellular Energetics

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Herein, 40 µL of reaction medium (see Section 4.6) was mixed with 40 µL of 2H2O (10% (v/v) in Tris buffer) and 320 µL of Tris buffer (pH 7.8, 100 mM Tris, 5 mm MgCl2, 5 µm ZnCl2,). Auto-shim was done on 2H2O. 31P-NMR spectra were measured with a Ascend™ 600 (Bruker®, Birrica, MA, USA) or with a 300 ultrashield (Bruker®) spectrometer. Simultaneous ATP, ADP, AMP, PPi, and Pi peaks were monitored [38 (link)]. Peaks were integrated to determine the concentrations of species based on the total phosphorous content (150 mM for), thanks to the natural abundancy of 31P. At least three independent measurements were performed to obtain kinetics parameters. In the absence of cells, the ATP hydrolysis was found to be negligible in the time course of the reaction.
Buchet R., Tribes C., Rouaix V., Doumèche B., Fiore M., Wu Y., Magne D, & Mebarek S. (2021). Hydrolysis of Extracellular ATP by Vascular Smooth Muscle Cells Transdifferentiated into Chondrocytes Generates Pi but Not PPi. International Journal of Molecular Sciences, 22(6), 2948.
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9

NMR Spectra Acquisition and Processing

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NMR spectra were recorded at 27°C (300K) on a 300 Ultrashield™ from Bruker (Billerica MA, USA). Data were processed with the software Mestrenova (Bruker GmbH, Karlsruhe, Germany). Samples were prepared at the desired concentration in D2O.
Van Lysebetten D., Malfanti A., Deswarte K., Koynov K., Golba B., Ye T., Zhong Z., Kasmi S., Lamoot A., Chen Y., Van Herck S., Lambrecht B.N., Sanders N.N., Lienenklaus S., David S.A., Vicent M.J., De Koker S, & De Geest B.G. (2021). A Lipid-Polyglutamate Nanoparticle Vaccine Platform. ACS applied materials & interfaces, 13(5), 6011-6022.
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10

Spectroscopic Characterization of Organic Compounds

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The NMR spectra were recorded on a Bruker 300 Ultra-Shield instrument (1H 300 MHz, 13C 75 MHz), using CDCl3, CD3OD, or DMSO-d6 as solvents. Chemical shifts in 1H and 13C NMR spectra are expressed in parts per million (ppm) on the δ scale using the solvent signal as an internal standard. NMR spectra were assigned using appropriate DEPT, COSY, HSQC, and HMBC sequences. Low-resolution mass spectrometry was performed in a Triple Quadrupole mass spectrometer from Waters AcquirityTM (Waters®, Ireland). The solvents used were dried according to published methods and distilled before use. Other reagents obtained from commercial suppliers were used without further purification. Column chromatography (CC) was performed on silica gel (Merck 9385, Darmstadt, Germany). Analytical thin-layer chromatography (TLC) was performed on precoated Merck silica gel 60 F254 plates with visualization under UV light (λ 254 and 366 nm) by spraying either with Dragendorff’s reagent or a solution of H2SO4 and MeOH (1:1), followed by heating.
Sancha S.A., Szemerédi N., Spengler G, & Ferreira M.J. (2023). Lycorine Carbamate Derivatives for Reversing P-glycoprotein-Mediated Multidrug Resistance in Human Colon Adenocarcinoma Cells. International Journal of Molecular Sciences, 24(3), 2061.
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