LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 792

Search options

  1. Article ; Online: High-Resolution Stable Isotope Paleotopography of the John Day Region, Oregon, United States

    Tyler Kukla / Daniel Enrique Ibarra / Jeremy K. Caves Rugenstein / Jared T. Gooley / Casey E. Mullins / Samuel Kramer / Danielle Y. Moragne / C. Page Chamberlain

    Frontiers in Earth Science, Vol

    2021  Volume 9

    Abstract: The John Day region of central Oregon, United States contains ∼50 million years of near-continuous ... history of the Cascades, which intercept westerly moisture in transit to the John Day region ... that can confound signals of Cascades uplift. John Day deposits, including the John Day Formation, are divided ...

    Abstract The John Day region of central Oregon, United States contains ∼50 million years of near-continuous, fossiliferous sedimentation, representing one of the world’s richest archives of Cenozoic terrestrial ecosystems and climate. Stable isotope proxy data from this region are commonly used to infer the elevation history of the Cascades, which intercept westerly moisture in transit to the John Day region. However, the Blue Mountains, which accreted in the Mesozoic, create a region of local high topography that can confound signals of Cascades uplift. John Day deposits, including the John Day Formation, are divided into an eastern facies located within the Blue Mountains and a western facies in the adjacent plains. As a result, the Blue Mountains may have supported gradients in climate and ecology between the eastern and western facies, and constraining these gradients is necessary for reconstructing past topography and ecosystem change. In order to define the Cenozoic extent and magnitude of Blue Mountains topography we use oxygen isotopes in authigenic clay minerals to construct a spatially resolved map of local elevation. We find that the oxygen isotope composition of clay minerals within the Blue Mountains is ∼3‰ lower than in the adjacent high plains, and this offset is mostly constant throughout our record (spanning ∼50 – 5 Ma). We attribute this offset to Blue Mountains topography, either directly from upslope rainout or indirectly through the effect of elevation on local variations in precipitation seasonality. Our results highlight the importance of local topographic features in regional paleotopography reconstructions and provide important biogeographical context for the rich paleo-floral and -faunal records preserved in John Day sediments.
    Keywords paleotopography ; John Day ; Blue Mountains ; oxygen isotopes ; biogeography ; clay minerals ; Science ; Q
    Subject code 550
    Language English
    Publishing date 2021-02-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  2. Article: Are your cash-flow tools recession ready?

    Mullins, John

    Business horizons

    2020  Volume 63, Issue 6, Page(s) 693–704

    Abstract: In good times like those most businesses have enjoyed for the past decade, business owners have typically watched their income statements with pleasure, as year-to-year performance gains have fattened their dividend payouts and increased the valuation of ...

    Abstract In good times like those most businesses have enjoyed for the past decade, business owners have typically watched their income statements with pleasure, as year-to-year performance gains have fattened their dividend payouts and increased the valuation of the companies they own and run. All too often in such times, scant attention is paid to what's between the top line and the bottom line of the income statement. Worse, most business owners, in my experience, give little more than a cursory nod to the balance sheet. Why does this matter? When a recession lands on their doorstep with a sudden thud, as it apparently just has, many of these same people will find themselves having sailed too close to the wind, with cash running out and a dearth of tools to help them weather the storm and understand what has gone wrong. But it need not be so, for there are four simple tools to help any business owner answer these four important questions: (1) Where is cash going in my business, and where is it coming from? (2) To what extent are my profit margins improving or declining, and why? (3) To what extent am I effectively managing the cash-flow relationships with my customers and my suppliers? (4) What, if anything, can I do to better manage the cash that flows into and out of my business? If your business is threatened by the COVID-19 pandemic, here are some tools to help it survive.
    Keywords covid19
    Language English
    Publishing date 2020-04-23
    Publishing country United States
    Document type Journal Article
    ISSN 0007-6813
    ISSN 0007-6813
    DOI 10.1016/j.bushor.2020.04.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article: Are your cash-flow tools recession ready?

    Mullins, John

    Business Horizons

    Abstract: In good times like those most businesses have enjoyed for the past decade, business owners have typically watched their income statements with pleasure, as year-to-year performance gains have fattened their dividend payouts and increased the valuation of ...

    Abstract In good times like those most businesses have enjoyed for the past decade, business owners have typically watched their income statements with pleasure, as year-to-year performance gains have fattened their dividend payouts and increased the valuation of the companies they own and run All too often in such times, scant attention is paid to what’s between the top line and the bottom line of the income statement Worse, most business owners, in my experience, give little more than a cursory nod to the balance sheet Why does this matter? When a recession lands on their doorstep with a sudden thud, as it apparently just has, many of these same people will find themselves having sailed too close to the wind, with cash running out and a dearth of tools to help them weather the storm and understand what has gone wrong But it need not be so, for there are four simple tools to help any business owner answer these four important questions: (1) Where is cash going in my business, and where is it coming from? (2) To what extent are my profit margins improving or declining, and why? (3) To what extent am I effectively managing the cash-flow relationships with my customers and my suppliers? (4) What, if anything, can I do to better manage the cash that flows into and out of my business? If your business is threatened by the COVID-19 pandemic, here are some tools to help it survive
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #829032
    Database COVID19

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Article ; Online: A Data-Driven Approach to Molten Salt Synthesis of N-Rich Carbon Adsorbents for Selective CO

    Burrow, James N / Eichler, John E / Martinez, Wuilian A / Mullins, C Buddie

    Advanced materials (Deerfield Beach, Fla.)

    2023  Volume 36, Issue 5, Page(s) e2306275

    Abstract: Applying a design of experiments methodology to the molten salt synthesis of nanoporous carbons enables inverse design and optimization of nitrogen (N)-rich carbon adsorbents with excellent ... ...

    Abstract Applying a design of experiments methodology to the molten salt synthesis of nanoporous carbons enables inverse design and optimization of nitrogen (N)-rich carbon adsorbents with excellent CO
    Language English
    Publishing date 2023-12-06
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1474949-X
    ISSN 1521-4095 ; 0935-9648
    ISSN (online) 1521-4095
    ISSN 0935-9648
    DOI 10.1002/adma.202306275
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  5. Article ; Online: Warming waters lead to increased habitat suitability for juvenile bull sharks (Carcharhinus leucas).

    Mullins, Lindsay / Cartwright, John / Dykstra, Steven L / Evans, Kristine / Mareska, John / Matich, Philip / Plumlee, Jeffrey D / Sparks, Eric / Drymon, J Marcus

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 4100

    Abstract: Coastal ecosystems are highly vulnerable to the impacts of climate change and other stressors, including urbanization and overfishing. Consequently, distributions of coastal fish have begun to change, particularly in response to increasing temperatures ... ...

    Abstract Coastal ecosystems are highly vulnerable to the impacts of climate change and other stressors, including urbanization and overfishing. Consequently, distributions of coastal fish have begun to change, particularly in response to increasing temperatures linked to climate change. However, few studies have evaluated how natural and anthropogenic disturbances can alter species distributions in conjunction with geophysical habitat alterations, such as changes to land use and land cover (LU/LC). Here, we examine the spatiotemporal changes in the distribution of juvenile bull sharks (Carcharhinus leucas) using a multi-decadal fishery-independent survey of coastal Alabama. Using a boosted regression tree (BRT) modeling framework, we assess the covariance of environmental conditions (sea surface temperature, depth, salinity, dissolved oxygen, riverine discharge, Chl-a) as well as historic changes to LU/LC to the distribution of bull sharks. Species distribution models resultant from BRTs for early (2003-2005) and recent (2018-2020) monitoring periods indicated a mean increase in habitat suitability (i.e., probability of capture) for juvenile bull sharks from 0.028 to 0.082, concomitant with substantial increases in mean annual temperature (0.058°C/yr), Chl-a (2.32 mg/m
    MeSH term(s) Animals ; Ecosystem ; Conservation of Natural Resources ; Fisheries ; Sharks/physiology
    Language English
    Publishing date 2024-03-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-54573-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  6. Article ; Online: Commentary: Lavigne and Faier-Routman (1992): Psychological Adjustment to Pediatric Physical Disorders: A Meta-Analytic Review.

    Mullins, Larry L / Chaney, John M

    Journal of pediatric psychology

    2019  Volume 44, Issue 7, Page(s) 846–848

    Language English
    Publishing date 2019-06-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 625329-5
    ISSN 1465-735X ; 0146-8693
    ISSN (online) 1465-735X
    ISSN 0146-8693
    DOI 10.1093/jpepsy/jsz036
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 1713: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  7. Article ; Online: Cellular plasticity: A mechanism for homeostasis in the kidney.

    Assmus, Adrienne M / Mullins, John J / Brown, Cara M / Mullins, Linda J

    Acta physiologica (Oxford, England)

    2020  Volume 229, Issue 1, Page(s) e13447

    Abstract: Cellular plasticity is a topical subject with interest spanning a wide range of fields from developmental biology to regenerative medicine. Even the nomenclature is a subject of debate, and the underlying mechanisms are still under investigation. On top ... ...

    Abstract Cellular plasticity is a topical subject with interest spanning a wide range of fields from developmental biology to regenerative medicine. Even the nomenclature is a subject of debate, and the underlying mechanisms are still under investigation. On top of injury repair, cell plasticity is a constant physiological process in adult organisms and tissues, in response to homeostatic challenges. In this review we discuss two examples of plasticity for the maintenance of homeostasis in the renal system-namely the renin-producing juxtaglomerular cells (JG cells) and cortical collecting duct (CCD) cells. JG cells show plasticity through recruitment mechanisms, answering the demand for an increase in renin production. In the CCD, cells appear to have the ability to transdifferentiate between principal and intercalated cells to help maintain the highly regulated solute transport levels of that segment. These two cases highlight the complexity of plasticity processes and the role they can play in the kidney.
    MeSH term(s) Animals ; Cell Plasticity ; Homeostasis ; Humans ; Kidney/cytology ; Kidney/metabolism ; Renin/metabolism
    Chemical Substances Renin (EC 3.4.23.15)
    Language English
    Publishing date 2020-02-12
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2218636-0
    ISSN 1748-1716 ; 1748-1708
    ISSN (online) 1748-1716
    ISSN 1748-1708
    DOI 10.1111/apha.13447
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Uc I Zs 229: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  8. Article: Flexibility and distributive synthesis regulate RNA priming and handoff in human DNA polymerase α-primase.

    Cordoba, John J / Mullins, Elwood A / Salay, Lauren E / Eichman, Brandt F / Chazin, Walter J

    bioRxiv : the preprint server for biology

    2023  

    Abstract: DNA replication in eukaryotes relies on the synthesis of a ~30-nucleotide RNA/DNA primer strand through the dual action of the heterotetrameric polymerase α-primase (pol-prim) enzyme. Synthesis of the 7-10-nucleotide RNA primer is regulated by the C- ... ...

    Abstract DNA replication in eukaryotes relies on the synthesis of a ~30-nucleotide RNA/DNA primer strand through the dual action of the heterotetrameric polymerase α-primase (pol-prim) enzyme. Synthesis of the 7-10-nucleotide RNA primer is regulated by the C-terminal domain of the primase regulatory subunit (PRIM2C) and is followed by intramolecular handoff of the primer to pol α for extension by ~20 nucleotides of DNA. Here we provide evidence that RNA primer synthesis is governed by a combination of the high affinity and flexible linkage of the PRIM2C domain and the low affinity of the primase catalytic domain (PRIM1) for substrate. Using a combination of small angle X-ray scattering and electron microscopy, we found significant variability in the organization of PRIM2C and PRIM1 in the absence and presence of substrate, and that the population of structures with both PRIM2C and PRIM1 in a configuration aligned for synthesis is low. Crosslinking was used to visualize the orientation of PRIM2C and PRIM1 when engaged by substrate as observed by electron microscopy. Microscale thermophoresis was used to measure substrate affinities for a series of pol-prim constructs, which showed that the PRIM1 catalytic domain does not bind the template or emergent RNA-primed templates with appreciable affinity. Together, these findings support a model of RNA primer synthesis in which generation of the nascent RNA strand and handoff of the RNA-primed template from primase to polymerase α is mediated by the high degree of inter-domain flexibility of pol-prim, the ready dissociation of PRIM1 from its substrate, and the much higher affinity of the POLA1cat domain of polymerase α for full-length RNA-primed templates.
    Language English
    Publishing date 2023-08-01
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.08.01.551538
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  9. Article ; Online: Flexibility and Distributive Synthesis Regulate RNA Priming and Handoff in Human DNA Polymerase α-Primase.

    Cordoba, John J / Mullins, Elwood A / Salay, Lauren E / Eichman, Brandt F / Chazin, Walter J

    Journal of molecular biology

    2023  Volume 435, Issue 24, Page(s) 168330

    Abstract: DNA replication in eukaryotes relies on the synthesis of a ∼30-nucleotide RNA/DNA primer strand through the dual action of the heterotetrameric polymerase α-primase (pol-prim) enzyme. Synthesis of the 7-10-nucleotide RNA primer is regulated by the C- ... ...

    Abstract DNA replication in eukaryotes relies on the synthesis of a ∼30-nucleotide RNA/DNA primer strand through the dual action of the heterotetrameric polymerase α-primase (pol-prim) enzyme. Synthesis of the 7-10-nucleotide RNA primer is regulated by the C-terminal domain of the primase regulatory subunit (PRIM2C) and is followed by intramolecular handoff of the primer to pol α for extension by ∼20 nucleotides of DNA. Here, we provide evidence that RNA primer synthesis is governed by a combination of the high affinity and flexible linkage of the PRIM2C domain and the surprisingly low affinity of the primase catalytic domain (PRIM1) for substrate. Using a combination of small angle X-ray scattering and electron microscopy, we found significant variability in the organization of PRIM2C and PRIM1 in the absence and presence of substrate, and that the population of structures with both PRIM2C and PRIM1 in a configuration aligned for synthesis is low. Crosslinking was used to visualize the orientation of PRIM2C and PRIM1 when engaged by substrate as observed by electron microscopy. Microscale thermophoresis was used to measure substrate affinities for a series of pol-prim constructs, which showed that the PRIM1 catalytic domain does not bind the template or emergent RNA-primed templates with appreciable affinity. Together, these findings support a model of RNA primer synthesis in which generation of the nascent RNA strand and handoff of the RNA-primed template from primase to polymerase α is mediated by the high degree of inter-domain flexibility of pol-prim, the ready dissociation of PRIM1 from its substrate, and the much higher affinity of the POLA1cat domain of polymerase α for full-length RNA-primed templates.
    MeSH term(s) Humans ; DNA Primase/metabolism ; DNA Primers ; DNA Replication ; RNA/metabolism
    Chemical Substances DNA polymerase alpha-primase (EC 2.7.7.-) ; DNA Primase (EC 2.7.7.-) ; DNA Primers ; PRIM1 protein, human (EC 2.7.7.-) ; RNA (63231-63-0) ; RNA primers
    Language English
    Publishing date 2023-10-24
    Publishing country Netherlands
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 80229-3
    ISSN 1089-8638 ; 0022-2836
    ISSN (online) 1089-8638
    ISSN 0022-2836
    DOI 10.1016/j.jmb.2023.168330
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 867: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  10. Article ; Online: Illness uncertainty, cognitive-emotional arousal, and sleep outcomes among emerging adults with a chronic medical condition.

    Fisher, Rachel S / Dattilo, Taylor M / Traino, Katherine A / Ciciolla, Lucia / Chaney, John M / Mullins, Larry L

    Journal of American college health : J of ACH

    2023  , Page(s) 1–9

    Abstract: Objective: ...

    Abstract Objective:
    Language English
    Publishing date 2023-07-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 604907-2
    ISSN 1940-3208 ; 0744-8481
    ISSN (online) 1940-3208
    ISSN 0744-8481
    DOI 10.1080/07448481.2023.2224440
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 427: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

To top