LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 7 of total 7

Search options

  1. Article ; Online: The Myriad Living Arrangements of U.S. Single Men and Women in Midlife

    Christopher A. Julian / Susan L. Brown

    Socius, Vol

    2023  Volume 9

    Abstract: Attention to the living arrangements of singles has centered around young adults who increasingly reside with their parents. By comparison, midlife singles remain overlooked despite a substantial rise in singlehood during this life-course stage. Using ... ...

    Abstract Attention to the living arrangements of singles has centered around young adults who increasingly reside with their parents. By comparison, midlife singles remain overlooked despite a substantial rise in singlehood during this life-course stage. Using the 2021 American Community Survey five-year estimates, the authors uncovered the disparate living arrangements of midlife single men and women household heads, defining midlife as those aged 30 to 49 and single as those who were neither cohabiting nor married. The findings revealed that the living arrangements of men and women were near inverses of each other, with most men living alone, whereas most women lived with someone else. Relative to men, a far greater share of women were residing with their children, whereas a larger share of men were in arrangements that did not include children. The distinctive living arrangements speak to the potential differences in familial obligations and available support sources.
    Keywords Social Sciences ; H ; Sociology (General) ; HM401-1281
    Language English
    Publishing date 2023-11-01T00:00:00Z
    Publisher SAGE Publishing
    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 ; Online: Visualizing Concentrations of Couples and Same-Sex Couples across U.S. Counties

    Francesca A. Marino / Krista K. Westrick-Payne / Wendy D. Manning / Susan L. Brown

    Socius, Vol

    2024  Volume 10

    Abstract: The 2020 decennial census provides a unique opportunity to directly count same-sex couples using a revised household roster, and its recently released Demographic and Housing Characteristics File offers county-level data on the concentration of same-sex ... ...

    Abstract The 2020 decennial census provides a unique opportunity to directly count same-sex couples using a revised household roster, and its recently released Demographic and Housing Characteristics File offers county-level data on the concentration of same-sex couples. As county-level data can unveil more nuanced geographic patterns than state-level data, the authors examine within-state variation using two maps of county-level quartiles to compare the percentages of individuals in unions among the population and same-sex unions among all unions. The findings reveal that concentrations of same-sex couples are not necessarily driven by the percentages of individuals in unions. These patterns suggest that the social location of same-sex couples is not determined solely by the area’s couple configuration but by other factors. To help illuminate these factors, future research should explore whether the counties with high shares of couples but low shares of same-sex couples are also areas where inclusivity tends to be lagging.
    Keywords Social Sciences ; H ; Sociology (General) ; HM401-1281
    Subject code 338
    Language English
    Publishing date 2024-01-01T00:00:00Z
    Publisher SAGE Publishing
    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.

  3. Article ; Online: Visualizing Children’s Family Structure

    Gabrielle Juteau / Krista K. Westrick-Payne / Susan L. Brown / Wendy D. Manning

    Socius, Vol

    2023  Volume 9

    Abstract: This visualization illustrates the multidimensionality of family life among U.S. children. The authors used the 2022 Current Population Survey Annual Social and Economic Supplements from the Integrated Public Use Microdata Series to examine the ... ...

    Abstract This visualization illustrates the multidimensionality of family life among U.S. children. The authors used the 2022 Current Population Survey Annual Social and Economic Supplements from the Integrated Public Use Microdata Series to examine the intersection of three family structure domains: number of parents, relationship of child to parent(s), and parental union type. Even as 74 percent of children live with two parents, only 60 percent lived with their two biological or adoptive married parents, and substantial variation was evident in children’s family configurations. By focusing on child’s relationship to parent, the authors revealed that a minority of children lived with only their stepparent(s). A consideration of parents’ parental union status shows that parents within stepfamilies are almost nearly as likely to cohabit than marry. Children not residing with their parents were mostly living with other family members, mainly their grandparents, and these relatives were largely married or single. The results suggest that limiting family structure to one domain conceals its complexity by providing a narrow lens on families.
    Keywords Social Sciences ; H ; Sociology (General) ; HM401-1281
    Subject code 331
    Language English
    Publishing date 2023-11-01T00:00:00Z
    Publisher SAGE Publishing
    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.

  4. Article ; Online: Visualizing 20 Years of Racial-Ethnic Variation in Women’s Ages at Sexual Initiation and Family Formation

    Paul Hemez / Karen Benjamin Guzzo / Wendy D. Manning / Susan L. Brown / Krista K. Payne

    Socius, Vol

    2020  Volume 6

    Abstract: This data visualization uses several cycles of the National Survey of Family Growth to compare trends in median ages at first sex, birth, cohabitation, and marriage between 1995 and 2015 across non-Hispanic white, non-Hispanic black, native-born Hispanic, ...

    Abstract This data visualization uses several cycles of the National Survey of Family Growth to compare trends in median ages at first sex, birth, cohabitation, and marriage between 1995 and 2015 across non-Hispanic white, non-Hispanic black, native-born Hispanic, and foreign-born Hispanic women aged 40 to 44 years. Generally, women’s ages at first sex declined, ages at first cohabitation remained stable, and ages at marriage and birth increased. However, there were substantial race-ethnicity-nativity differences in the timing and sequencing of women’s reproductive and family experiences, and these differences grew over time. These descriptive findings point to the importance of identifying the larger social forces that contribute to differential experiences while underscoring the fundamental problems inherent with defining whites’ reproductive and family behaviors as “normal.”
    Keywords Social Sciences ; H ; Sociology (General) ; HM401-1281
    Subject code 300
    Language English
    Publishing date 2020-07-01T00:00:00Z
    Publisher SAGE Publishing
    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.

  5. Article ; Online: Nonresident Fathers and Formal Child Support

    J. Bart Stykes / Wendy D. Manning / Susan L. Brown

    Demographic Research, Vol 29, p

    Evidence from the CPS, NSFG, and SIPP

    2013  Volume 46

    Abstract: Background : Since the beginning of the 1980s, researchers have been raising concerns that surveys underestimated nonresident fatherhood due to sampling and questionnaire effects. Consequently, federal data collection efforts focused resources on reports ...

    Abstract Background : Since the beginning of the 1980s, researchers have been raising concerns that surveys underestimated nonresident fatherhood due to sampling and questionnaire effects. Consequently, federal data collection efforts focused resources on reports from custodial mothers rather than from nonresident fathers. Recent data from three national sources provide researchers with an opportunity to estimate the prevalence of nonresident fathers. Objective : Our goals were to provide estimates of contemporary nonresident fatherhood and of formal child support payments in the U.S., and to examine the consistency of these estimates across surveys. Methods : We presented descriptive results for the proportion of men (aged 15-44) who reported having a nonresident child, and the proportion of nonresident fathers who reported having provided some formal support in the last year, using three nationally representative surveys: the Current Population Survey (CPS), the Survey of Income and Program Participation (SIPP), and the National Survey of Family Growth (NSFG). Results : The NSFG produced higher estimates of nonresident fatherhood, whereas both the CPS and the SIPP produced lower estimates of nonresident fatherhood. The findings on the composition of the nonresident father population by race/ethnicity and educational attainment also differed across the surveys. The results further demonstrated that the nonresident fathers identified in the NSFG were less likely to have been providing formal support, and that the racial/ethnic and educational differences found in the provision of formal support varied across the surveys. Conclusions : Three nationally representative U.S. surveys produced substantively different estimates of the nonresident father population, and of the extent to which these fathers were providing formal child support. Ultimately, this study illustrates that we lack robust estimates of nonresident fatherhood in the U.S.
    Keywords child support ; methods ; nonresident fathers ; survey measurement ; Social sciences (General) ; H1-99 ; Social Sciences ; H
    Subject code 333
    Language English
    Publishing date 2013-12-01T00:00:00Z
    Publisher Max Planck Institute for Demographic Research
    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.

  6. Article: Demonstrated large-scale production of marine microalgae for fuels and feed

    Huntley, Mark E / Charles H. Greene / Colin Beal / Deborah L. Sills / Ian Archibald / Joe Granados / Léda Gerber / Stephen C. Machesky / Susan L. Brown / Zackary I. Johnson

    Elsevier B.V. Algal research. 2015 July, v. 10

    2015  

    Abstract: We present the results from sustained tonne-quantity production of two novel strains of marine microalgae, the diatom Staurosira and the chlorophyte Desmodesmus, cultivated in a hybrid system of 25-m3 photobioreactors and 400-m2 open ponds at a large- ... ...

    Abstract We present the results from sustained tonne-quantity production of two novel strains of marine microalgae, the diatom Staurosira and the chlorophyte Desmodesmus, cultivated in a hybrid system of 25-m3 photobioreactors and 400-m2 open ponds at a large-scale demonstration facility, and then apply those results to evaluate the performance of a 100-ha Base Case commercial facility assuming it were built today. Nitrogen fertilization of 2-d batch cultures in open ponds led to the greatest yields – from both species – of ~75MTha−1yr−1 biomass, and ~30MTha−1yr−1 lipid, which are unprecedented in large scale open pond systems. The process described here uses only seawater, discharges no nitrogen or phosphorus in any form, and consumes CO2 at 78% efficiency. We estimate the capital cost of a 111-ha Base Case facility at $67 million in Hawaii, where actual production was performed, and $59 million on the Gulf Coast of Texas. We find that large-diameter, large-volume PBRs are an economical means to maintain a continuous supply of consistent inoculum for very short-period batch cultures in open ponds, and thus avoid biological system crashes that otherwise arise in longer-term pond cultures. We recommend certain improvements in cultivation methods that could realistically lead to yields of 100MTha−1yr−1 biomass and >50,000Lha−1yr−1 algal oil. Comprehensive techno-economics and life cycle assessment of 20 end-to-end production lineups, based on the cultivation results in this paper, are presented in a companion paper by Beal et al. [1].
    Keywords algae culture ; algal oils ; Bacillariophyceae ; biomass ; capital ; carbon dioxide ; coasts ; fertilizer application ; fuels ; inoculum ; life cycle assessment ; lipids ; microalgae ; nitrogen ; nitrogen fertilizers ; phosphorus ; photobioreactors ; ponds ; seawater ; Hawaii ; Texas
    Language English
    Dates of publication 2015-07
    Size p. 249-265.
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 2211-9264
    DOI 10.1016/j.algal.2015.04.016
    Database NAL-Catalogue (AGRICOLA)

    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.

  7. Article ; Online: Evolutionary and biotechnological implications of robust hydrogenase activity in halophilic strains of Tetraselmis.

    Sarah D'Adamo / Robert E Jinkerson / Eric S Boyd / Susan L Brown / Bonnie K Baxter / John W Peters / Matthew C Posewitz

    PLoS ONE, Vol 9, Iss 1, p e

    2014  Volume 85812

    Abstract: Although significant advances in H2 photoproduction have recently been realized in fresh water algae (e.g. Chlamydomonas reinhardtii), relatively few studies have focused on H2 production and hydrogenase adaptations in marine or halophilic algae. Salt ... ...

    Abstract Although significant advances in H2 photoproduction have recently been realized in fresh water algae (e.g. Chlamydomonas reinhardtii), relatively few studies have focused on H2 production and hydrogenase adaptations in marine or halophilic algae. Salt water organisms likely offer several advantages for biotechnological H2 production due to the global abundance of salt water, decreased H2 and O2 solubility in saline and hypersaline systems, and the ability of extracellular NaCl levels to influence metabolism. We screened unialgal isolates obtained from hypersaline ecosystems in the southwest United States and identified two distinct halophilic strains of the genus Tetraselmis (GSL1 and QNM1) that exhibit both robust fermentative and photo H2-production activities. The influence of salinity (3.5%, 5.5% and 7.0% w/v NaCl) on H2 production was examined during anoxic acclimation, with the greatest in vivo H2-production rates observed at 7.0% NaCl. These Tetraselmis strains maintain robust hydrogenase activity even after 24 h of anoxic acclimation and show increased hydrogenase activity relative to C. reinhardtii after extended anoxia. Transcriptional analysis of Tetraselmis GSL1 enabled sequencing of the cDNA encoding the FeFe-hydrogenase structural enzyme (HYDA) and its maturation proteins (HYDE, HYDEF and HYDG). In contrast to freshwater Chlorophyceae, the halophilic Tetraselmis GSL1 strain likely encodes a single HYDA and two copies of HYDE, one of which is fused to HYDF. Phylogenetic analyses of HYDA and concatenated HYDA, HYDE, HYDF and HYDG in Tetraselmis GSL1 fill existing knowledge gaps in the evolution of algal hydrogenases and indicate that the algal hydrogenases sequenced to date are derived from a common ancestor. This is consistent with recent hypotheses that suggest fermentative metabolism in the majority of eukaryotes is derived from a common base set of enzymes that emerged early in eukaryotic evolution with subsequent losses in some organisms.
    Keywords Medicine ; R ; Science ; Q
    Subject code 333
    Language English
    Publishing date 2014-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    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.

To top