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  1. Article ; Online: Electrochemical Azidooxygenation of Alkenes Mediated by a TEMPO-N

    Siu, Juno C / Sauer, Gregory S / Saha, Ambarneil / Macey, Reed L / Fu, Niankai / Chauviré, Timothée / Lancaster, Kyle M / Lin, Song

    Journal of the American Chemical Society

    2018  Volume 140, Issue 39, Page(s) 12511–12520

    Abstract: ... N difunctionalized compounds from simple alkenes. Detailed mechanistic studies revealed a distinct ... complex with azide, TEMPO-N ...

    Abstract We report a mild and efficient electrochemical protocol to access a variety of vicinally C-O and C-N difunctionalized compounds from simple alkenes. Detailed mechanistic studies revealed a distinct reaction pathway from those previously reported for TEMPO-mediated reactions. In this mechanism, electrochemically generated oxoammonium ion facilitates the formation of azidyl radical via a charge-transfer complex with azide, TEMPO-N
    MeSH term(s) Azides/chemistry ; Chemistry Techniques, Synthetic ; Cyclic N-Oxides/chemistry ; Electrochemical Techniques ; Kinetics ; Spectrophotometry, Ultraviolet
    Chemical Substances Azides ; Cyclic N-Oxides ; TEMPO (VQN7359ICQ)
    Language English
    Publishing date 2018-09-12
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.8b06744
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Seaweed biogeochemistry: Global assessment of C:N and C:P ratios and implications for ocean afforestation.

    Sheppard, Emily J / Hurd, Catriona L / Britton, Damon D / Reed, Daniel C / Bach, Lennart T

    Journal of phycology

    2023  Volume 59, Issue 5, Page(s) 879–892

    Abstract: Algal carbon-to-nitrogen (C:N) and carbon-to-phosphorus (C:P) ratios are fundamental ... Australia (51 species, 10 locations) to update the global ratios of seaweed carbon-to-nitrogen (C:N) and ... carbon-to-phosphorus (C:P). The updated global mean molar ratio for seaweed C:N is 20 (ranging from 6 ...

    Abstract Algal carbon-to-nitrogen (C:N) and carbon-to-phosphorus (C:P) ratios are fundamental for understanding many oceanic biogeochemical processes, such as nutrient flux and climate regulation. We synthesized literature data (444 species, >400 locations) and collected original samples from Tasmania, Australia (51 species, 10 locations) to update the global ratios of seaweed carbon-to-nitrogen (C:N) and carbon-to-phosphorus (C:P). The updated global mean molar ratio for seaweed C:N is 20 (ranging from 6 to 123) and for C:P is 801 (ranging from 76 to 4102). The C:N and C:P ratios were significantly influenced by seawater inorganic nutrient concentrations and seasonality. Additionally, C:N ratios varied by phyla. Brown seaweeds (Ochrophyta, Phaeophyceae) had the highest mean C:N of 27.5 (range: 7.6-122.5), followed by green seaweeds (Chlorophyta) of 17.8 (6.2-54.3) and red seaweeds (Rhodophyta) of 14.8 (5.6-77.6). We used the updated C:N and C:P values to compare seaweed tissue stoichiometry with the most recently reported values for plankton community stoichiometry. Our results show that seaweeds have on average 2.8 and 4.0 times higher C:N and C:P than phytoplankton, indicating seaweeds can assimilate more carbon in their biomass for a given amount of nutrient resource. The stoichiometric comparison presented herein is central to the discourse on ocean afforestation (the deliberate replacement of phytoplankton with seaweeds to enhance the ocean biological carbon sink) by contributing to the understanding of the impact of nutrient reallocation from phytoplankton to seaweeds under large-scale seaweed cultivation.
    Language English
    Publishing date 2023-08-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 281226-5
    ISSN 1529-8817 ; 0022-3646
    ISSN (online) 1529-8817
    ISSN 0022-3646
    DOI 10.1111/jpy.13381
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Exploring reactivity and product formation in N(

    Nieman, Reed / Spezia, Riccardo / Jayee, Bhumika / Minton, Timothy K / Hase, William L / Guo, Hua

    The Journal of chemical physics

    2020  Volume 153, Issue 18, Page(s) 184702

    Abstract: ... simulations of atomic-nitrogen [N( ...

    Abstract Atomic nitrogen is formed in the high-temperature shock layer of hypersonic vehicles and contributes to the ablation of their thermal protection systems (TPSs). To gain atomic-level understanding of the ablation of carbon-based TPS, collisions of hyperthermal atomic nitrogen on representative carbon surfaces have recently be investigated using molecular beams. In this work, we report direct dynamics simulations of atomic-nitrogen [N(
    Language English
    Publishing date 2020-11-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0028253
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Synthesis of Halogenated Anilines by Treatment of N, N-Dialkylaniline N-Oxides with Thionyl Halides.

    Reed, Hayley / Paul, Tyler R / Chain, William J

    The Journal of organic chemistry

    2018  Volume 83, Issue 18, Page(s) 11359–11368

    Abstract: The special reactivity of N,N-dialkylaniline N-oxides allows practical and convenient access ... bromination or ortho-chlorination of N,N-dialkylanilines in up to 69% isolated yield. The generation ... of a diverse array of halogenated anilines is made possible by a temporary oxidation level increase of N,N ...

    Abstract The special reactivity of N,N-dialkylaniline N-oxides allows practical and convenient access to electron-rich aryl halides. A complementary pair of reaction protocols allow for the selective para-bromination or ortho-chlorination of N,N-dialkylanilines in up to 69% isolated yield. The generation of a diverse array of halogenated anilines is made possible by a temporary oxidation level increase of N,N-dialkylanilines to the corresponding N,N-dialkylaniline N-oxides and the excision of the resultant weak N- O bond via treatment with thionyl bromide or thionyl chloride at low temperature.
    MeSH term(s) Aniline Compounds/chemical synthesis ; Aniline Compounds/chemistry ; Chemistry Techniques, Synthetic ; Halogenation ; Oxides/chemistry
    Chemical Substances Aniline Compounds ; Oxides
    Language English
    Publishing date 2018-08-09
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.8b01590
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Manganese-Catalyzed N-Alkylation of Sulfonamides Using Alcohols.

    Reed-Berendt, Benjamin G / Morrill, Louis C

    The Journal of organic chemistry

    2019  Volume 84, Issue 6, Page(s) 3715–3724

    Abstract: An efficient manganese-catalyzed N-alkylation of sulfonamides has been developed. This borrowing ... alkyl sulfonamides undergoes mono- N-alkylation in excellent isolated yields (32 examples, 85% average yield). ...

    Abstract An efficient manganese-catalyzed N-alkylation of sulfonamides has been developed. This borrowing hydrogen approach employs a well-defined and bench-stable Mn(I) PNP pincer precatalyst, allowing benzylic and simple primary aliphatic alcohols to be employed as alkylating agents. A diverse range of aryl and alkyl sulfonamides undergoes mono- N-alkylation in excellent isolated yields (32 examples, 85% average yield).
    Language English
    Publishing date 2019-02-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.9b00203
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: An N-terminal fusion allele to study melanin concentrating hormone receptor 1.

    Jasso, Kalene R / Kamba, Tisianna K / Zimmerman, Arthur D / Bansal, Ruchi / Engle, Staci E / Everett, Thomas / Wu, Chang-Hung / Kulaga, Heather / Reed, Randal R / Berbari, Nicolas F / McIntyre, Jeremy C

    Genesis (New York, N.Y. : 2000)

    2021  Volume 59, Issue 7-8, Page(s) e23438

    Abstract: ... mCherry into the N-terminus of Mchr1. Analysis of the fusion protein ( ...

    Abstract Cilia on neurons play critical roles in both the development and function of the central nervous system (CNS). While it remains challenging to elucidate the precise roles for neuronal cilia, it is clear that a subset of G-protein-coupled receptors (GPCRs) preferentially localize to the cilia membrane. Further, ciliary GPCR signaling has been implicated in regulating a variety of behaviors. Melanin concentrating hormone receptor 1 (MCHR1), is a GPCR expressed centrally in rodents known to be enriched in cilia. Here we have used MCHR1 as a model ciliary GPCR to develop a strategy to fluorescently tag receptors expressed from the endogenous locus in vivo. Using CRISPR/Cas9, we inserted the coding sequence of the fluorescent protein mCherry into the N-terminus of Mchr1. Analysis of the fusion protein (
    MeSH term(s) Alleles ; Animals ; Cilia/metabolism ; Homozygote ; Melanins/metabolism ; Mice ; Mice, Inbred C57BL ; Neurons/metabolism ; Neurons/physiology ; Receptors, Somatostatin/genetics ; Receptors, Somatostatin/metabolism ; Synapses/metabolism ; Synapses/physiology ; Synaptic Potentials
    Chemical Substances Mchr1 protein, mouse ; Melanins ; Receptors, Somatostatin
    Language English
    Publishing date 2021-06-14
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2004544-X
    ISSN 1526-968X ; 1526-954X
    ISSN (online) 1526-968X
    ISSN 1526-954X
    DOI 10.1002/dvg.23438
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: An N-Ethyl-N-Nitrosourea (ENU)-Induced Tyr265Stop Mutation of the DNA Polymerase Accessory Subunit Gamma 2 (Polg2) Is Associated With Renal Calcification in Mice.

    Gorvin, Caroline M / Ahmad, Bushra N / Stechman, Michael J / Loh, Nellie Y / Hough, Tertius A / Leo, Paul / Marshall, Mhairi / Sethi, Siddharth / Bentley, Liz / Piret, Sian E / Reed, Anita / Jeyabalan, Jeshmi / Christie, Paul T / Wells, Sara / Simon, Michelle M / Mallon, Ann-Marie / Schulz, Herbert / Huebner, Norbert / Brown, Matthew A /
    Cox, Roger D / Brown, Steve D / Thakker, Rajesh V

    Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research

    2018  Volume 34, Issue 3, Page(s) 497–507

    Abstract: ... abdominal X-rays to identify renal opacities in N-ethyl-N-nitrosourea (ENU)-mutagenized mice ...

    Abstract Renal calcification (RCALC) resulting in nephrolithiasis and nephrocalcinosis, which affects ∼10% of adults by 70 years of age, involves environmental and genetic etiologies. Thus, nephrolithiasis and nephrocalcinosis occurs as an inherited disorder in ∼65% of patients, and may be associated with endocrine and metabolic disorders including: primary hyperparathyroidism, hypercalciuria, renal tubular acidosis, cystinuria, and hyperoxaluria. Investigations of families with nephrolithiasis and nephrocalcinosis have identified some causative genes, but further progress is limited as large families are unavailable for genetic studies. We therefore embarked on establishing mouse models for hereditary nephrolithiasis and nephrocalcinosis by performing abdominal X-rays to identify renal opacities in N-ethyl-N-nitrosourea (ENU)-mutagenized mice. This identified a mouse with RCALC inherited as an autosomal dominant trait, designated RCALC type 2 (RCALC2). Genomewide mapping located the Rcalc2 locus to a ∼16-Mbp region on chromosome 11D-E2 and whole-exome sequence analysis identified a heterozygous mutation in the DNA polymerase gamma-2, accessory subunit (Polg2) resulting in a nonsense mutation, Tyr265Stop (Y265X), which co-segregated with RCALC2. Kidneys of mutant mice (Polg2
    MeSH term(s) Animals ; Calcinosis/genetics ; Calcinosis/metabolism ; Calcinosis/pathology ; Codon, Terminator ; DNA Polymerase gamma/genetics ; DNA Polymerase gamma/metabolism ; Ethylnitrosourea/toxicity ; Kidney/metabolism ; Kidney/pathology ; Kidney Diseases/genetics ; Kidney Diseases/metabolism ; Kidney Diseases/pathology ; Mice ; Mice, Mutant Strains
    Chemical Substances Codon, Terminator ; DNA Polymerase gamma (EC 2.7.7.7) ; Polg protein, mouse (EC 2.7.7.7) ; Ethylnitrosourea (P8M1T4190R)
    Language English
    Publishing date 2018-12-14
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 632783-7
    ISSN 1523-4681 ; 0884-0431
    ISSN (online) 1523-4681
    ISSN 0884-0431
    DOI 10.1002/jbmr.3624
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Half-life extension of peptidic APJ agonists by N-terminal lipid conjugation.

    Reed, Anthony B / Lanman, Brian A / Holder, Jerry Ryan / Yang, Bryant H / Ma, Ji / Humphreys, Sara C / Wang, Zhican / Chan, Joyce C Y / Miranda, Les P / Swaminath, Gayathri / Allen, John G

    Bioorganic & medicinal chemistry letters

    2020  Volume 30, Issue 21, Page(s) 127499

    Abstract: Agonism of the endothelial receptor APJ (putative receptor protein related to ... ...

    Abstract Agonism of the endothelial receptor APJ (putative receptor protein related to AT
    MeSH term(s) Animals ; Apelin Receptors/agonists ; Apelin Receptors/metabolism ; Dose-Response Relationship, Drug ; Injections, Intravenous ; Lipids/administration & dosage ; Lipids/chemistry ; Lipids/pharmacology ; Molecular Structure ; Myocardial Infarction/drug therapy ; Myocardial Infarction/metabolism ; Peptides/administration & dosage ; Peptides/chemistry ; Peptides/pharmacology ; Rats ; Structure-Activity Relationship
    Chemical Substances Apelin Receptors ; Aplnr protein, rat ; Lipids ; Peptides
    Language English
    Publishing date 2020-08-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 1063195-1
    ISSN 1464-3405 ; 0960-894X
    ISSN (online) 1464-3405
    ISSN 0960-894X
    DOI 10.1016/j.bmcl.2020.127499
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  9. Article ; Online: Seaweed biogeochemistry: Global assessment of C:N and C:P ratios and implications for ocean afforestation

    Sheppard, Emily J. / Hurd, Catriona L. / Britton, Damon D. / Reed, Daniel C. / Bach, Lennart T.

    Journal of Phycology. 2023 Oct., v. 59, no. 5 p.879-892

    2023  

    Abstract: Algal carbon‐to‐nitrogen (C:N) and carbon‐to‐phosphorus (C:P) ratios are fundamental ... Australia (51 species, 10 locations) to update the global ratios of seaweed carbon‐to‐nitrogen (C:N) and ... carbon‐to‐phosphorus (C:P). The updated global mean molar ratio for seaweed C:N is 20 (ranging from 6 ...

    Abstract Algal carbon‐to‐nitrogen (C:N) and carbon‐to‐phosphorus (C:P) ratios are fundamental for understanding many oceanic biogeochemical processes, such as nutrient flux and climate regulation. We synthesized literature data (444 species, >400 locations) and collected original samples from Tasmania, Australia (51 species, 10 locations) to update the global ratios of seaweed carbon‐to‐nitrogen (C:N) and carbon‐to‐phosphorus (C:P). The updated global mean molar ratio for seaweed C:N is 20 (ranging from 6 to 123) and for C:P is 801 (ranging from 76 to 4102). The C:N and C:P ratios were significantly influenced by seawater inorganic nutrient concentrations and seasonality. Additionally, C:N ratios varied by phyla. Brown seaweeds (Ochrophyta, Phaeophyceae) had the highest mean C:N of 27.5 (range: 7.6–122.5), followed by green seaweeds (Chlorophyta) of 17.8 (6.2–54.3) and red seaweeds (Rhodophyta) of 14.8 (5.6–77.6). We used the updated C:N and C:P values to compare seaweed tissue stoichiometry with the most recently reported values for plankton community stoichiometry. Our results show that seaweeds have on average 2.8 and 4.0 times higher C:N and C:P than phytoplankton, indicating seaweeds can assimilate more carbon in their biomass for a given amount of nutrient resource. The stoichiometric comparison presented herein is central to the discourse on ocean afforestation (the deliberate replacement of phytoplankton with seaweeds to enhance the ocean biological carbon sink) by contributing to the understanding of the impact of nutrient reallocation from phytoplankton to seaweeds under large‐scale seaweed cultivation.
    Keywords Chlorophyta ; Phaeophyceae ; Rhodophyta ; afforestation ; algology ; biomass ; carbon ; carbon sinks ; climate ; macroalgae ; phytoplankton ; seawater ; seaweed culture ; stoichiometry ; Tasmania
    Language English
    Dates of publication 2023-10
    Size p. 879-892.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 281226-5
    ISSN 1529-8817 ; 0022-3646
    ISSN (online) 1529-8817
    ISSN 0022-3646
    DOI 10.1111/jpy.13381
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Automated Preparation of MS-Sensitive Fluorescently Labeled N-Glycans with a Commercial Pipetting Robot.

    Reed, Corey E / Fournier, Jennifer / Vamvoukas, Nikolaos / Koza, Stephan M

    SLAS technology

    2018  Volume 23, Issue 6, Page(s) 550–559

    Abstract: N-Glycan analysis is routinely performed for biotherapeutic protein characterization. A recently ... introduced N-glycan analysis kit using RapiFluor-MS (RFMS) labeling provides time savings over reductive ... two heating and cooling steps during protein denaturation and de-N-glycosylation. However, the current ...

    Abstract N-Glycan analysis is routinely performed for biotherapeutic protein characterization. A recently introduced N-glycan analysis kit using RapiFluor-MS (RFMS) labeling provides time savings over reductive amination labeling methods while also providing enhanced fluorescence (FLR) and mass spectrometry (MS) responses. This article demonstrates the semiautomation of this kit using an Andrew Alliance pipetting robot that promises further gains in productivity. This robotic platform uses standard manual pipettors and an optically guided arm to facilitate the automation of manual procedures. The manual RFMS protocol includes two heating and cooling steps during protein denaturation and de-N-glycosylation. However, the current Andrew Alliance automated platform cannot move reaction tubes to and from different heating blocks. As a result, samples prepared using the automated procedure remain in a computer-controlled Peltier effect heating block, requiring reoptimization of denaturation and de-N-glycosylation temperatures. Using hydrophilic interaction liquid chromatography to monitor the RFMS-labeled glycan profiles, the authors demonstrated the reproducibility of the automated protocol with percent relative standard deviations (RSDs) of 9%-19% for the total area and 0.8%-20% for the relative areas of major and minor glycoforms. Overall, the automated platform presented here proves to be a convenient and reliable solution for N-glycan preparation and analysis.
    MeSH term(s) Automation, Laboratory/methods ; Fluorescent Dyes/metabolism ; Mass Spectrometry/instrumentation ; Mass Spectrometry/methods ; Polysaccharides/analysis ; Proteins/chemistry ; Reproducibility of Results ; Robotics/instrumentation ; Staining and Labeling/instrumentation ; Staining and Labeling/methods
    Chemical Substances Fluorescent Dyes ; Polysaccharides ; Proteins
    Language English
    Publishing date 2018-04-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2900310-6
    ISSN 2472-6311 ; 2472-6303
    ISSN (online) 2472-6311
    ISSN 2472-6303
    DOI 10.1177/2472630318762384
    Database MEDical Literature Analysis and Retrieval System OnLINE

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