Gotowe bibliografie tematyczne / Bruker Spectrometer

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Gotowa bibliografia na temat „Bruker Spectrometer”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Bruker Spectrometer"

Zharkov, I. P., V. V. Safronov, V. O. Khodunov, V. M. Konoval, V. A. Maslov, A. V. Selivanov, A. G. Solonetskiy i in. "Expansion of Bruker Vertex 70v FTІR Spectrometer Capabilities". Science and innovation 13, nr 5 (21.11.2017): 73–77. http://dx.doi.org/10.15407/scine13.05.073.

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Zharkov, I. P., V. V. Safronov, V. O. Khodunov, V. M. Konoval, V. O. Maslov, А. V. Selivanov, A. G. Solonetsky i in. "Expansion of Bruker Vertex 70v FTІR Spectrometer Capabilities". Nauka ta innovacii 13, nr 5 (30.09.2017): 77–82. http://dx.doi.org/10.15407/scin13.05.077.

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Wikus, Patrick, Wolfgang Frantz, Rainer Kümmerle i Patrik Vonlanthen. "Commercial gigahertz-class NMR magnets". Superconductor Science and Technology 35, nr 3 (20.01.2022): 033001. http://dx.doi.org/10.1088/1361-6668/ac4951.

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Abstract Nuclear magnetic resonance (NMR) spectroscopy is a wide-spread analytical technique which is used in a large range of different fields, such as quality control, food analysis, material science and structural biology. In the widest sense, NMR is an analytical technique to determine the structure of molecules. At the time of writing this manuscript, commercial NMR spectrometers with a proton resonance frequency ⩾900 MHz are only available from Bruker. In 2019, Bruker installed the first 1.1 GHz (25.8 T) NMR spectrometer at the St. Jude Children Research Hospital in Memphis, Tennessee, followed by the installation of the first 1.2 GHz (28.2 T) NMR spectrometer at the University of Florence in Italy in 2020. These were the first commercial NMR spectrometers operating at magnetic fields in excess of what can be achieved with conventional low temperature superconductors, and which depend on high temperature superconductors to generate the required magnetic field. In this paper, the requirements on commercial NMR magnets are discussed and the history of high-field NMR magnets is reviewed. Bruker’s R&D program for 1.1 and 1.2 GHz NMR magnets and spectrometers will be described, and some of the key properties of these first commercial NMR magnets with high-temperature superconductors are reported.

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Weatherall, James C., Jeffrey Barber, Carolyn S. Brauer, Timothy J. Johnson, Yin-Fong Su, Christopher D. Ball, Barry T. Smith i in. "Adapting Raman Spectra from Laboratory Spectrometers to Portable Detection Libraries". Applied Spectroscopy 67, nr 2 (luty 2013): 149–57. http://dx.doi.org/10.1366/12-06759.

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Raman spectral data collected with high-resolution laboratory spectrometers are processed into a format suitable for importing as a user library on a 1064 nm DeltaNu first generation, field-deployable spectrometer prototype. The two laboratory systems used are a 1064 nm Bruker Fourier transform (FT)-Raman spectrometer and a 785 nm Kaiser dispersive spectrometer. The steps taken to adapt for device-dependent spectral resolution, wavenumber shifts between instruments, and relative intensity response are described. Effects due to the differing excitation laser wavelengths were found to be minimal, indicating—at least for the near-infrared (NIR)—that data can be ported between different systems, so long as certain measures are taken with regard to the reference and field spectra.

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Vallet, Alicia, Adrien Favier, Bernhard Brutscher i Paul Schanda. "ssNMRlib: a comprehensive library and tool box for acquisition of solid-state nuclear magnetic resonance experiments on Bruker spectrometers". Magnetic Resonance 1, nr 2 (23.12.2020): 331–45. http://dx.doi.org/10.5194/mr-1-331-2020.

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Abstract. We introduce ssNMRlib, a comprehensive suite of pulse sequences and jython scripts for user-friendly solid-state nuclear magnetic resonance (NMR) data acquisition, parameter optimization and storage on Bruker spectrometers. ssNMRlib allows the straightforward setup of even highly complex multi-dimensional solid-state NMR experiments with a few clicks from an intuitive graphical interface directly from the Bruker Topspin acquisition software. ssNMRlib allows the setup of experiments in a magnetic-field-independent manner and thus facilitates the workflow in a multi-spectrometer setting with a centralized library. Safety checks furthermore assist the user in experiment setup. Currently hosting more than 140 1D to 4D experiments, primarily for biomolecular solid-state NMR, the library can be easily customized and new experiments are readily added as new templates. ssNMRlib is part of the previously introduced NMRlib library, which comprises many solution-NMR pulse sequences and macros.

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Zharkov, I. P., V. V. Safronov, V. O. Khodunov, V. M. Konoval, V. O. Maslov, O. V. Selivanov, А. G. Solonetsky, V. V. Strelchuk, A. S. Nikolenko i B. I. Tsykaniuk. "Complex of Cryogenic Apparatus for Infrared Fourier Bruker Vertex 70v Spectrometer". Nauka ta innovacii 15, nr 4 (13.08.2019): 78–87. http://dx.doi.org/10.15407/scin15.04.078.

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Batchelor, R. L., F. Kolonjari, R. Lindenmaier, R. L. Mittermeier, W. Daffer, H. Fast, G. Manney, K. Strong i K. A. Walker. "Four Fourier transform spectrometers and the Arctic polar vortex: instrument intercomparison and ACE-FTS validation at Eureka during the IPY springs of 2007 and 2008". Atmospheric Measurement Techniques Discussions 2, nr 6 (6.11.2009): 2881–917. http://dx.doi.org/10.5194/amtd-2-2881-2009.

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Abstract. The Canadian Arctic Atmospheric Chemistry Experiment Validation Campaigns have been carried out at Eureka, Nunavut (80.05° N, 86.42° W) during the polar sunrise period since 2004. During the International Polar Year (IPY) springs of 2007 and 2008, three ground-based Fourier transform infrared (FTIR) spectrometers were operated simultaneously. This paper presents a comparison of trace gas measurements of stratospherically important species involved in ozone depletion, namely O3, HCl, ClONO2, HNO3 and HF, recorded with these three spectrometers. Total column densities of the gases measured with the new Canadian Network for the Detection of Atmospheric Change (CANDAC) Bruker 125HR are shown to agree to within 3.5% with the existing Environment Canada Bomem DA8 measurements. After smoothing both of these sets of measurements to account for the lower spectral resolution of the University of Waterloo Portable Atmospheric Research Interferometric Spectrometer for the Infrared (PARIS-IR), the measurements were likewise shown to agree with PARIS-IR to within 7%. Concurrent measurements of these gases were also made with the satellite-based Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) during overpasses of Eureka during these time periods. While one of the mandates of the ACE satellite mission is to study ozone depletion in the polar spring, previous validation exercises have identified the highly variable polar vortex conditions of the spring period to be a challenge for validation efforts. In this work, comparisons between the CANDAC Bruker 125HR and ACE-FTS have been used to develop strict criteria that allow the ground- and satellite-based instruments to be confidently compared. When these criteria are taken into consideration, there is shown to be no significant bias between the ACE-FTS and ground-based FTIR spectrometer for any of these gases.

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Batchelor, R. L., F. Kolonjari, R. Lindenmaier, R. L. Mittermeier, W. Daffer, H. Fast, G. Manney, K. Strong i K. A. Walker. "Four Fourier transform spectrometers and the Arctic polar vortex: instrument intercomparison and ACE-FTS validation at Eureka during the IPY springs of 2007 and 2008". Atmospheric Measurement Techniques 3, nr 1 (22.01.2010): 51–66. http://dx.doi.org/10.5194/amt-3-51-2010.

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Abstract. The Canadian Arctic Atmospheric Chemistry Experiment Validation Campaigns have been carried out at Eureka, Nunavut (80.05° N, 86.42° W) during the polar sunrise period since 2004. During the International Polar Year (IPY) springs of 2007 and 2008, three ground-based Fourier transform infrared (FTIR) spectrometers were operated simultaneously. This paper presents a comparison of trace gas measurements of stratospherically important species involved in ozone depletion, namely O3, HCl, ClONO2, HNO3 and HF, recorded with these three spectrometers. Total column densities of the gases measured with the new Canadian Network for the Detection of Atmospheric Change (CANDAC) Bruker 125HR are shown to agree to within 3.5% with the existing Environment Canada Bomem DA8 measurements. After smoothing both of these sets of measurements to account for the lower spectral resolution of the University of Waterloo Portable Atmospheric Research Interferometric Spectrometer for the Infrared (PARIS-IR), the measurements were likewise shown to agree with PARIS-IR to within 7%. Concurrent measurements of these gases were also made with the satellite-based Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) during overpasses of Eureka during these time periods. While one of the mandates of the ACE satellite mission is to study ozone depletion in the polar spring, previous validation exercises have identified the highly variable polar vortex conditions of the spring period to be a challenge for validation efforts. In this work, comparisons between the CANDAC Bruker 125HR and ACE-FTS have been used to develop strict criteria that allow the ground- and satellite-based instruments to be confidently compared. When these criteria are taken into consideration, the observed biases between the ACE-FTS and ground-based FTIR spectrometer are not persistent for both years and are generally insignificant, though small positive biases of ~5%, comparable in magnitude to those seen in previous validation exercises, are observed for HCl and HF in 2007, and negative biases of −15.3%, −4.8% and −1.5% are seen for ClONO2, HNO3 and O3 in 2008.

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Batchelor, Rebecca L., Kimberly Strong, Rodica Lindenmaier, Richard L. Mittermeier, Hans Fast, James R. Drummond i Pierre F. Fogal. "A New Bruker IFS 125HR FTIR Spectrometer for the Polar Environment Atmospheric Research Laboratory at Eureka, Nunavut, Canada: Measurements and Comparison with the Existing Bomem DA8 Spectrometer". Journal of Atmospheric and Oceanic Technology 26, nr 7 (1.07.2009): 1328–40. http://dx.doi.org/10.1175/2009jtecha1215.1.

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Abstract A new Bruker IFS 125HR Fourier transform spectrometer has been installed at the Polar Environment Atmospheric Research Laboratory at Eureka, Nunavut, Canada (80.05°N, 86.42°W). This instrument will become the Network for the Detection of Atmospheric Composition Change’s (NDACC’s) primary instrument at Eureka, replacing the existing Bomem DA8 Fourier transform spectrometer, and will operate throughout the sunlit parts of the year. This paper introduces the new instrument and describes the retrieval procedure, including a comprehensive error analysis. Total columns of O3, HCl, HF, HNO3, N2O, CH4, and CO are presented for the first full year of measurements (2007). Perturbations in the total column resulting from the presence of the Arctic polar vortex over Eureka and the chemical processes within it are visible, as are annual cycles driven by photochemistry and dynamics. Enhancements in the CO total column resulting from specific biomass burning smoke events can also be seen. An intercomparison between the existing Bomem DA8 and the new Bruker IFS 125HR was carried out in July 2007 and is presented here. The total columns derived from the two instruments are shown to be in excellent agreement, with mean differences for all gases of less than 2.3%.

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Stepanov, A. S., i N. V. Vasilyeva. "NEW OPPORTUNITIES TO IDENTIFY AND TYPE STAPHYLOCOCCUS spp. BY USING MALDI-TOF MASS SPECTROMETRY". Russian Journal of Infection and Immunity 8, nr 4 (16.01.2019): 489–96. http://dx.doi.org/10.15789/2220-7619-2018-4-489-496.

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Abstract.Mass spectrometry profiles of microorganisms obtained by time-of-flight matrix-associated laser desorption/ionization (MALDI-TOF) mass spectrometry are a source of information about peptide profiles can be used for microbial identification and typing. A variety of technical and bioinformational solutions complicate developing of a united mass-spectro-profile database. Staphylococcus spp. strains are good studied objects for identification by MALDI-TOF mass spectrometry, frequently resulting in nosocomial infections, especially in immunocompromised patients. Rapid differentiation of nosocomial, multiresistant and highly virulent isolates of Staphylococcus spp. Allows to reduce the lethality in weakened and immunocompromised patients. The study was aimed at assessing comparability and reproducibility of identification and typing results for Staphylococcus spp by MALDI-TOF mass spectrometry. Comparing 292 Staphylococcus spp. isolates in clinical specimens obtained fron the multidisciplinary hospital at the NWSMU im. I.I. Mechnikov was carried out by using MALDI-TOF mass spectrometer BactoSCREEN ID (Litech, Russia) and Bruker Biotyper 3.1 (Bruker GmbH, Germany). Comparability of Staphylococcus spp. identification showed that 95.9%; 12 isolates (4.1%) by “Bruker Biotyper 3.1” and 3 isolates (1.1%) by using “BactoSCREEN ID” were incorrectly identified. Repeated identification leveled the differences between the systems used. In addition, it was shown that the method of protein extraction did not affect reliability of Staphylococcus spp. species identification by using databases (÷2, p > 0.05) compared to intraspecific typing (÷2, p < 0.0001). Using different extraction protocols showed that Staphylococcus spp. mass-spectra differed by peak intensity level within the mass range up to 4000 m/z, 5300±600 m/z and 6500±500 m/z, as well as higher than 7000 m/z. Peaks of low-molecular weight peptides were detected under full protein extraction compared to sample preparation on plate extraction. To develop a unified protocol for mass-spectrometry profile processing, a reliability of the basic statistical variables (mode, median, maximum, minimum and arithmetic mean) was evaluated. Analysis of the median mass spectrometry profiles is recommended for Staphylococcus spp. intraspecific typing by using MALDI-TOF mass spectrometry as the most reproducible and consistent approach. As a result, two systems for MALDI-TOF mass spectrometry reliably identify Staphylococcus spp., but standardization of sample preparation and bioinformation analysis is required for Staphylococcus spp. typing.

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Rozprawy doktorskie na temat "Bruker Spectrometer"

Roberts, Matthew D. "Lipidomic investigations into the phospholipid content and metabolism of various kinetoplastids". Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/16983.

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This work expands the knowledge on phospholipid metabolism in the kinetoplastid parasites: T. brucei, T. cruzi, Leishmania spp. that cause neglected tropical diseases and the related non-human pathogenic Crithidia fasiculata. As a close relative of parasitic kinetoplasts, specifically Leishmania, it is hypothesised that Crithidia fasiculata possesses a similar lipid biosynthetic capability and therefore represent an attractive model organism. Database mining the Crithidia genome revealed the ability to biosynthesise all of the main phospholipid species. Utilising various lipidomic techniques, a high level of an ω-6 18:3 fatty acid was observed, alongside an uncommon Δ19:0 fatty acid that was later identified to be exclusive attributed to PE species. Sphingolipid metabolism was shown to resemble that of Leishmania and T. cruzi, given the exclusive production of inositol-phosphoceramide species and no sphingomyelin species being observed. Using labelled precursors, Crithidia were seen to uptake and incorporate extracellular inositol into both phosphatidylinositol and inositol-phosphoceramide species. Crithidia were also shown to utilise both the Kennedy pathway and methylation of phosphatidylethanolamine to form phosphatidylcholine. The phospholipidome of T. cruzi revealed several phosphatidylserine species for the first time, suggesting a functional phosphatidylserine synthase. Current knowledge of T.cruzi sphingolipid biosynthesis was also confirmed as only inositol xxxi phosphoceramide species were observed. The identification and subsequent characterisation of novel phosphonolipid species are reported for the first time. Utilising lipidomic methodologies and labelled precursors, the relative contribution of the intracellular inositol pools within bloodstream and procyclic T. brucei towards PI biosynthesis was examined. This highlighted that the synthesis/turnover rates for specific phosphatidylinositol and inositol-phosphoceramide species are unequal. Efforts to optimise media conditions highlighted that under reduced levels of serum/glucose/inositol, bloodstream T. brucei unexpectedly adjusts its inositol metabolism. The procyclic parasite exemplifies this fact, as under inositol/glucose deficient media conditions they appear to have adapted to utilising glucogenesis and inositol de-novo synthesis. This work highlights that these parasites are rapidly dividing, their unique features of lipid metabolism may be exploitable for drug discovery purposes.

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Książki na temat "Bruker Spectrometer"

Harwood, John S., i Huaping Mo. Practical NMR Spectroscopy Laboratory Guide : Using Bruker Spectrometers: Using Bruker Spectrometers. Elsevier Science & Technology Books, 2015.

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Harwood, John S., i Huaping Mo. Practical NMR Spectroscopy Laboratory Guide: Using Bruker Spectrometers. Elsevier Science & Technology Books, 2015.

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Części książek na temat "Bruker Spectrometer"

Höfer, P., A. Kamlowski, G. G. Maresch, D. Schmalbein i R. T. Weber. "The Bruker ELEXSYS E600/680 W-Band Spectrometer Series". W Very High Frequency (VHF) ESR/EPR, 401–29. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4379-1_12.

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Deininger, Soeren-Oliver. "Bruker Daltonics". W Imaging Mass Spectrometry, 199–208. Tokyo: Springer Japan, 2010. http://dx.doi.org/10.1007/978-4-431-09425-8_15.

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Cirovic, Olivera, i Torsten Ochsenreiter. "Whole Proteome Analysis of the Protozoan Parasite Trypanosoma brucei Using Stable Isotope Labeling by Amino Acids in Cell Culture and Mass Spectrometry". W Methods in Molecular Biology, 47–55. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1142-4_4.

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Jardetzky, Oleg. "Simple Insights from the Beginnings of Magnetic Resonance in Molecular Biology". W Biological NMR Spectroscopy. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195094688.003.0006.

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Birthday symposia inevitably provide an opportunity for reflection. Noting that greater minds than mine have offered an apology for their life (St. Augustine, 1853 edition; St. Thomas Aquinas; John Henry cardinal Newman, 1864), I shall attempt to answer the question: What have been the lasting contributions of my generation - the generation that began its work before Richard Ernst’s epoch making development of 2D NMR, and the equally momentous development of high field spectrometers, pioneered by Harry Weaver at Varian, Rex Richards at Oxford and Gunther Laukien at Bruker, revolutionized the technology and put biological applications within everyone’s reach? I offer these insights in the spirit that to fully understand a subject one must understand its history. The essence of scientific endeavor is to see something no one has seen before - or understand something no one had understood before. If there had been such a contribution, it was to understand what biological questions could be asked by NMR and to develop prototype experiments showing how. Difficult as it is to imagine this today when such understanding is taken for granted, the now obvious just wasn’t obvious then. Quite the contrary: well considered expert opinion of the day held the undertaking to be of very dubious merit. Linus Pauling, with whom it was my great fortune to spend my postdoctoral year, was never much interested in nuclear magnetic resonance (and did not think much of its promise for biological applications, as he clearly pointed out at this symposium). But, Linus Pauling firmly believed in giving the young the freedom to explore, and so the first crude interpretation of a protein NMR spectrum, taken a few weeks earlier by Martin Saunders, Arnold Wishnia and J. G. Kirkwoodat Yale, was based on the first amino acid and peptide spectra we had taken at Caltech. When I got my first faculty job at Harvard, and wanted to apply for an NMR spectrometer, it was not quite as easy.

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E. Khrulev, Alexey, Irina V. Belova, Irina V. Soloveva, Anna G. Tochilina, Natalya A. Shiyanova, Anastasiya A. Nikitina i Natalya S. Khruleva. "Specific Cerebrovascular Risk Factors, Colon Microbiocenosis and Its Correction in Patients Receiving Long-Term Programmed Hemodialysis". W Multidisciplinary Experiences in Renal Replacement Therapy. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.101300.

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Introduction: The problem of acute and chronic cerebrovascular disorders in dialysis patients remains the most urgent. Risk factors for cerebrovascular diseases in CKD and dialysis patients can be conditionally divided into “traditional” (arterial hypertension, diabetes mellitus, hypercholesterolemia) and “specific” (associated with renal pathology and dialysis procedures). The spectrum of specific factors of cerebrovascular risk in patients with dialysis stage of the CKD includes specific dialysis factors that form during programmed HD, as well as impaired phosphorus-calcium metabolism and calcification of the arterial microvasculature, increased blood levels of β2-microglobulin, homocysteine, malondialdehyde and superoxide dismutase, a decrease in the level of nitric oxide (II) metabolites, development of nephrogenic anemia and dysfunction of blood cells, malnutrition and dietary features of patients with renal pathology, accumulation of uremic toxins and toxins of intestinal bacteria, etc. Opportunistic gut microorganisms can produce uremic toxins, which are associated with an increased risk of inflammation, increased oxidative stress, and a higher risk of cardiovascular disease (CVD). Description of the spectrum of risk factors for cerebrovascular pathology in dialysis patients and effective control over them seems to be an effective strategy aimed at increasing the duration and quality of life in patients receiving renal replacement therapy. The aim of the investigation was to study the species composition of colon microbiocenosis in patients with CKD receiving programmed HD treatment and to evaluate the effectiveness of its correction using a new immobilized synbiotic. Materials and methods: Samples of colon microbiota from 62 patients undergoing programmed hemodialysis were studied before and after a course of diet therapy that included probiotic components, in particular, the immobilized synbiotic LB-complex L. Isolation of microorganisms was carried out according to our original method; for bacteria identification, a MALDI-TOF Autoflex speed mass spectrometer (Bruker Daltonik, Germany) was used in the Biotyper program mode. The results were assessed using the criteria proposed by the authors and based on the OST 91500.11.0004-2003. The efficacy of the immobilized synbiotic was determined based on the clinical data, questionnaires, and bacteriological tests. Results: In patients receiving programmed hemodialysis (before the start of the diet therapy), chronic moderate inflammation and azotemia were found. Dysbiotic changes in microbiocenosis were revealed in all the examined patients; in the absence or suppression of lacto- and bifidoflora, the number and diversity of Bacteroides spp., Clostridium spp., Collinsella spp., Eggerthella spp. and other bacteria increased, which was consistent with the theory of functional redundancy of gut microbiota. From the answers to the questionnaires, a decrease in the quality of life was found (up to 70 points out of 100) according to six of the eight scales used. After the combined therapy using the synbiotic LB-complex L in the study group, 56% of the examined patients showed their microbiocenosis restored to normal; no grade III dysbiosis was detected in any patient. There was a significant decrease in CRP and ESR in these patients and an improvement in the quality of life by criteria reflecting physical health. Conclusion: Acute/chronic CVD in patients with CKD of the pre-dialysis and dialysis periods are the most frequent and formidable complications. The spectrum of “traditional” and “specific” CV risk factors in dialysis patients will be described in the chapter. Special attention will be paid to the intestinal microbiota and opportunistic intestinal microorganisms. The aim was to study the species composition of colon microbiocenosis in HD patients, and to evaluate the effectiveness of its correction using a new immobilized synbiotic. Materials and Methods. Samples of colon microbiota from 62 HD patients were studied before/after a course of diet therapy that included probiotic components, the immobilized synbiotic LB-complex L. MALDI-TOF Autoflex speed mass spectrometer was used in the Biotyper program mode. The efficacy of the immobilized synbiotic was determined based on the clinical data, questionnaires, and bacteriological tests. Results. Dysbiotic changes in microbiocenosis were revealed in all patients; in the absence/suppression of lacto-and bifidoflora, the number and diversity of Bacteroides spp.,Clostridium spp.,Collinsella spp.,Eggerthella spp. and other bacteria increased. After the combined therapy using the synbiotic LB-complex L in the study group, 56% of the examined patients showed their microbiocenosis restored to normal; no grade III dysbiosis was detected in any patient.

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Streszczenia konferencji na temat "Bruker Spectrometer"

Mengel, Markus, Brenda P. Winnewisser i Manfred Winnewisser. "Multipassing a Cryogenic Sample: Use of a White-Type Cell with 8 Passes for Studying Solid Hydrogen". W Fourier Transform Spectroscopy. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fts.1997.fwa.3.

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The use of a White-type multipass arrangement external to the optical head of a cryostat for Fourier transform spectroscopy of solid H2 was explored in previous work from our laboratory [1, 2]. The present measurements were made by extending from 4 to 8 passes through the cell within the liquid-He vaporization cryostat (Janis Research Inc., Model 10 DT) [3]. This multireflection system was mounted inside the sample chamber of the Bruker IFS 120 HR interferometer as shown in Fig. 1. Water absorptions were minimized by evacuating the whole spectrometer. All six windows of the cryostat and of the sample cell were equipped with an antireflection coating which was optimized for the spectral range 7500 - 9000 cm-1.

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Carleer, M., R. Colin, A. C. Vandaele i P. C. Simon. "Detection of Minor Tropospheric Constituents using Fourier Transform Spectroscopy". W Optical Remote Sensing of the Atmosphere. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/orsa.1991.owe19.

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In the frame of TOPAS (Tropospheric OPtical Absorption Spectroscopy), an EURO-TRAC subproject supported by the Belgian State - Prime Minister’s Service - Science Policy Office and the ”Fond National de la Recherche Scientique”, a long path (788 m) absorption system has been constructed on the urban site of the campus of the Université Libre de Bruxelles. It consists of a Xenon high pressure emission source connected to a 30 cm Cassegrain type telescope. A parabolic mirror placed at a distance of 394 m reflects the light back into a similar telescope connected to a high resolution Fourier Transform spectrometer BRUKER IFS120HR. The two telescopes are mounted on alignment devices and the external mirror is equipped with a driving system operated from the laboratory. This system has been in operation since October 1990. Absorption structures of O2, O3, NO2 and SO2 have been observed in the UV region (25000-45000 cm-1). The spectra are recorded at a dispersion of 8 cm-1.

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Rengle, A., H. Ratiney, A. Bucur, S. Cavassila i O. Beuf. "Magnetic resonance imaging (MRI) and spectroscopy (MRS) using simultaneous 2-channel acquisitions: Application for mouse brain examination by reconfiguration of a “standard” Bruker spectrometer". W 2008 5th IEEE International Symposium on Biomedical Imaging (ISBI 2008). IEEE, 2008. http://dx.doi.org/10.1109/isbi.2008.4541025.

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Stephen, T. M., F. J. Murcray, J. J. Kosters i S. L. Nasiri. "Automated Remote Operations of Bruker FTIR Instruments". W Optical Remote Sensing of the Atmosphere. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/orsa.1997.pdp.1.

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The need for consistent long term monitoring of the composition of the atmosphere is recognized as a priority in the scientific community. This is certainly demonstrated by the wide support of the Network for the Detection of Stratospheric Change (NDSC) and the Department of Energy's support of the Atmospheric Radiation Measurement program (ARM). This paper describes automated Fourier transform infrared (FTIR) spectrometers that were developed for these programs and deployed in the field to fulfill mission requirements. These systems are typically in the care of site technicians with little or no training in FTIR spectroscopy. The technicians are primarily responsible for filling detector dewars with liquid nitrogen and performing visual inspections of the instrument on a daily basis.

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"Molecular composition - inhibition activity relationships for humic substances narrow fractions sets obtained by solid-phase extraction". W Sixth International Conference on Humic Innovative Technologies "Humic Substances and Eco-Adaptive Technologies ”(HIT – 2021). Non-Commercial Partnership "Center for Biogenic Resources "Humus Sapiens" (NP CBR "Humus Sapiens"), 2021. http://dx.doi.org/10.36291/hit.2021.mikhnevich.001.

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Humic substances (HS) have a wide spectrum of biological activity including inhibitory activity against β-lactamases.1 The latter are capable of hydrolyzing beta-lactam antibiotics and represent one of the main pathways of bacterial antibiotic resistance. HS are characterized by low toxicity and good solubility in water. A use of HS for therapeutic purposes is hindered by extreme molecular heterogeneity and high level of isomeric complexity. Solid-phase extraction (SPE) fractionation in combination with ultra-high resolution mass spectrometry (FTICR MS) is a promising method to simplify this molecular system and isolate the most active components of HS. The aim of this work was to test various SPE fractionation schemes as an approach to directed isolation of the components with the given activity from HS. The sample of coal humic acids (CHA-G) was isolated from the commercial sodium humate “Genesis” and separated using SPE cartridge according to gradients in polarity1 and acidity2 inherent within the molecular components of HS. Inhibitory activity against β- lactamase TEM-1 and its mutants was measured using chromogenic substrate CENTA. Molecular composition of fractions was determined using FTICR mass spectrometer 15 T solariX (Bruker Daltonics) located at the Collective Use Center of Zelinsky Institute of Organic Chemistry of RAS. Molecular assignments were plotted into van Krevelen diagrams. The diagrams were binned into 20 cells are assigned to seven chemotypes, and occupational densities for each chemotype were calculated after Perminova.3 For the fractions separated by polarity, a substantial difference in the molecular composition was observed. Inhibitory activity grew along with an increase in hydrophobicity. The HS activity increased along with an increase in contribution of condensed tannins and phenylisopropanoids (O/C <0.5, H/C <1.4) and decreased along with contribution of hydrolyzed tannins (O/C> 0.5, H/C <1.4). The similar analysis was conducted for the fractions separated with regard to pKa value of the dominating functional groups. The most isomeric complex molecular components were defined, which can be found in different HS fractions, but they are identical in elemental composition. The data obtained make it possible to choose the most efficient fractionation method that effectively lowers the molecular complexity of HS and makes it possible to isolate the most active HS fractions. SPE-fractionation in combination with 2D chromatography is going to be used in our future studies to achieve high resolution separation and more reliable “molecular composition-activity” relationships. Further research might bring substantial advance in the field of directed design of biologically active humic-based materials and compositions. Acknowledgements. This work was supported by the grant of the Russian Science Foundation no 21-73-20202. The center of collective use of the Zelinsky IOC RAS is appreciated. The research was conducted in the framework of the Scientific-Educational School of the Lomonosov MSU “Future of the plant and global environmental change”. References 1. Mikhnevich et al., ACS Omega, 2021, https://doi.org/10.1021/acsomega.1c02841 2. Zherebker et al., Environ. Sci. Technol. 2020, 54, 2667−2677 3. Perminova, I. V. PAC, 2019, 91(5), 851

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Fink, Ewald H., i Fachbereich Chemie. "Fourier-transform Emission Spectroscopy of Molecular Transitions in the Near-Infrared". W Fourier Transform Spectroscopy. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fts.1997.fwb.2.

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Emission spectra of transitions from low-lying metastable electronic states of diatomic radicals have been studied in the NIR region with high-resolution BOMEM or BRUKER Fourier- transform spectrometers. Different groups of radicals and types of transitions have been studied, - a1Δ(g)→X3Σ-(g) and b1Σ+(g)→X3Σ-(g) transitions of radicals of the O2/NH/NF family, - a3Σ-(u)(a11(u))→X1Σ+(g)(X0+(g)) transitions of group VA diatomics (BiN, BiP, BiAs, BiSb, Bi2, Sb2), - transitions between the fine structure components of widely split X2Π or x3ς ground states of metal hydrides, halides and chalcogenides (BiH, BiX, BiY, TeH, TeX, PbX; X=F,Cl,Br,I; Y=O,S,Se).

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De Mazière, Martine, Michel Van Roozendael i Philippe Demoulin. "O3 and NO2 total column databases at the Jungfraujoch and Harestua NDSC stations from FTIR and DOAS UV/Visible observations: an update". W Optical Remote Sensing of the Atmosphere. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/orsa.1997.ofa.2.

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Remote sensing measurements of total column amounts by spectroscopic techniques heavily rely on spectroscopic parameters for the target and interfering species, and on a priori vertical profile information. This paper discusses recent updates of O3 and NO2 datasets at the Jungfraujoch and Harestua primary and secondary NDSC (Network for Detection of Stratospheric Changes) stations, resp., from high-resolution EHR (Fourier Transform Infrared) and DOAS (Differential Optical Absorption Spectroscopy) UV/Visible observations. The former are direct-sun absorption measurements throughout the day under clear-sky conditions, the latter are zenith-sky scattered light measurements, daily at twilight. At the Jungfraujoch (ISSJ) the latter are performed with a SAOZ instrument since mid-1990; at Harestua, a home-made, NDSC-qualified instrument has been operated since 1993, on a more or less continuous basis. Two FTIR spectrometers, a Bruker IFS 120HR and a home-made FTS are operated on a regular basis at ISSJ; the FTIR database for NO2 starts in 1985.

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Raporty organizacyjne na temat "Bruker Spectrometer"

Henzl, Vlad, Rollin Lakis, Katrina Koehler i David Desimone. Uranium and thorium detection limits of handheld Bruker Tracer III XRF spectrometer. Office of Scientific and Technical Information (OSTI), maj 2021. http://dx.doi.org/10.2172/1782621.

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Baranoski, John M., i Terri L. Longworth. Domestic Preparedness Program Evaluation of the IMS20000 (trademark) (Bruker Daltonics GmbH Ion Mobility Spectrometer 2000) Against Chemical Warfare Agents Summary Report. Fort Belvoir, VA: Defense Technical Information Center, lipiec 2003. http://dx.doi.org/10.21236/ada440433.

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