The White Possessiveexplores the links between race, sovereignty, and possession through themes of property: owning property, being property, and becoming propertyless. Focusing on the Australian ...Aboriginal context, Aileen Moreton-Robinson questions current race theory in the first world and its preoccupation with foregrounding slavery and migration. The nation, she argues, is socially and culturally constructed as a white possession.
Moreton-Robinson reveals how the core values of Australian national identity continue to have their roots in Britishness and colonization, built on the disavowal of Indigenous sovereignty. Whiteness studies literature is central to Moreton-Robinson's reasoning, and she shows how blackness works as a white epistemological tool that bolsters the social production of whiteness-displacing Indigenous sovereignties and rendering them invisible in a civil rights discourse, thereby sidestepping thorny issues of settler colonialism.
Throughout this critical examination Moreton-Robinson proposes a bold new agenda for critical Indigenous studies, one that involves deeper analysis of how the prerogatives of white possession function within the role of disciplines.
The discovery of the Sry gene in 1990 triggered a revolution in our understanding of sex determination. More recently, advances in non-model organisms have been fuelled by the rapid evolution of ...affordable genome and transcriptome technologies. This Review considers the unusual plasticity in the bipotential system of sex determination and some of the diverse mechanisms that have evolved to control this critical developmental decision, including strong genetic pathways, environmental influences and epigenetic regulation. Ideas emerging from model and non-model organisms that suggest that sex determination operates as an antagonistic network with the emergent property of bistability are discussed.
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•In Ar atmosphere 1,4-benzoquinone (BQ) can be used as an effective e− scavenger.•In oxic atmosphere BQ effectively competes with O2 molecules for electrons.•BQ is only suitable for ...overestimation of the amount of superoxide radicals.•1,4-Hydroquinone (H2Q) was found to be a better O2− radical scavenger than BQ.•H2Q can be easily and accurately measured by fluorescence spectroscopy.
In competition-based experiments, 1,4-benzoquinone (BQ) has been a frequently applied compound for determination of the role of O2− radicals. In those studies, only the influence of BQ (as a competitive O2− scavenger) on the degradation of a model compound (substrate) was investigated. Our goal was to develop a new, simple method monitoring a characteristic product of the reaction between the superoxide radical ion and BQ during heterogeneous photocatalysis. Interestingly, based on our results, if the concentration of BQ exceeds that of dissolved oxygen, it reacts with photogenerated electrons rather than with O2− radicals. During this process, it is quantitatively reduced to 1,4-hydroquinone (H2Q), the degradation of which was found to be dependent of the presence of O2− radicals. The photocatalytic transformation of both compounds (BQ, H2Q) was systematically investigated in anoxic and oxic atmosphere. Two new methods requiring only fluorescence measurements have been suggested: one for the determination of electrons with BQ (under anaerobic conditions) and another for the measurement of O2− radicals with H2Q.
It was no coincidence that the Civil War occurred during an age of violent political upheaval in Europe and the Americas. Grounding the causes and philosophies of the Civil War in an international ...context, Andre M. Fleche examines how questions of national self-determination, race, class, and labor the world over influenced American interpretations of the strains on the Union and the growing differences between North and South. Setting familiar events in an international context, Fleche enlarges our understanding of nationalism in the nineteenth century, with startling implications for our understanding of the Civil War.Confederates argued that European nationalist movements provided models for their efforts to establish a new nation-state, while Unionists stressed the role of the state in balancing order and liberty in a revolutionary age. Diplomats and politicians used such arguments to explain their causes to thinkers throughout the world. Fleche maintains that the fight over the future of republican government in America was also a battle over the meaning of revolution in the Atlantic world and, as such, can be fully understood only as a part of the world-historical context in which it was fought.
Mud crabs, Scylla spp., are commercially important large-size marine crustaceans in the Indo-West Pacific region. As females have the higher growth rate and economic value, the production of all ...female stocks is extremely essential in aquaculture. However, the sex determination mechanism is still unclear. Development of sex-specific genetic markers based on next-generation sequencing proved to be an effective tool for discovering sex determination system in various animals.
Restriction-site associated DNA sequencing (RAD-seq) was employed to isolate sex-specific SNP markers for S. paramamosain. A total of 335.6 million raw reads were obtained from 20 individuals, of which 204.7 million were from 10 females and 130.9 million from 10 males. After sequence assembly and female-male comparison, 20 SNP markers were identified to be sex-specific. Furthermore, ten SNPs in a short sequence (285 bp) were confirmed heterozygous in females and homozygous in males in a large population by PCR amplification and sequencing. Subsequently, a female-specific primer was successfully designed according to the female-specific nucleotide which could amplify an expected band from females but not from males. Thus, a rapid and effective method for molecular sexing in S. paramamosain was developed, meanwhile, this method could successfully identify the sex of S. tranquebarica and S. serrata. Finally, nine and four female-specific SNP markers were detected in S. tranquebarica and S. serrata, respectively.
Sex-specific SNP markers were firstly identified in crab species and showed female heterogamety and male homogamety, which provided strong genetic evidence for a WZ/ZZ sex determination system in mud crabs S. paramamosain, S. tranquebarica and S. serrata. These findings will lay a solid foundation for the study of sex determination mechanism, sex chromosome evolution, and the development of mono-sex population in crustaceans.
The X in Sex Bainbridge, David
2003, 20030101
eBook
This cultural and natural history of an intriguing member of the genome traces the journey toward our current understanding of the nature of X. From its chance discovery in the 19th century to the ...promise and implications of ongoing research, Bainbridge shows how the X evolved and where it and its counterpart Y are going.
To interpret blood pressure (BP) data appropriately, healthcare providers need to be knowledgeable of the factors that can potentially impact the accuracy of BP measurement and contribute to ...variability between measurements.
A systematic review of studies quantifying BP measurement inaccuracy. Medline and CINAHL databases were searched for empirical articles and systematic reviews published up to June 2015. Empirical articles were included if they reported a study that was relevant to the measurement of adult patients' resting BP at the upper arm in a clinical setting (e.g. ward or office); identified a specific source of inaccuracy; and quantified its effect. Reference lists and reviews were searched for additional articles.
A total of 328 empirical studies were included. They investigated 29 potential sources of inaccuracy, categorized as relating to the patient, device, procedure or observer. Significant directional effects were found for 27; however, for some, the effects were inconsistent in direction. Compared with true resting BP, significant effects of individual sources ranged from -23.6 to +33 mmHg SBP and -14 to +23 mmHg DBP.
A single BP value outside the expected range should be interpreted with caution and not taken as a definitive indicator of clinical deterioration. Where a measurement is abnormally high or low, further measurements should be taken and averaged. Wherever possible, BP values should be recorded graphically within ranges. This may reduce the impact of sources of inaccuracy and reduce the scope for misinterpretations based on small, likely erroneous or misleading, changes.
Sex determination mechanisms in teleost fish broadly differ from mammals and birds, with sex chromosomes that are far less differentiated and recombination often occurring along the length of the X ...and Y chromosomes, posing major challenges for the identification of specific sex determination genes. Here, we take an innovative approach of comparative genome analysis of the genomic sequences of the X chromosome and newly sequenced Y chromosome in the channel catfish.
Using a YY channel catfish as the sequencing template, we generated, assembled, and annotated the Y genome sequence of channel catfish. The genome sequence assembly had a contig N50 size of 2.7 Mb and a scaffold N50 size of 26.7 Mb. Genetic linkage and GWAS analyses placed the sex determination locus within a genetic distance less than 0.5 cM and physical distance of 8.9 Mb. However, comparison of the channel catfish X and Y chromosome sequences showed no sex-specific genes. Instead, comparative RNA-Seq analysis between females and males revealed exclusive sex-specific expression of an isoform of the breast cancer anti-resistance 1 (BCAR1) gene in the male during early sex differentiation. Experimental knockout of BCAR1 gene converted genetic males (XY) to phenotypic females, suggesting BCAR1 as a putative sex determination gene.
We present the first Y chromosome sequence among teleost fish, and one of the few whole Y chromosome sequences among vertebrate species. Comparative analyses suggest that sex-specific isoform expression through alternative splicing may underlie sex determination processes in the channel catfish, and we identify BCAR1 as a potential sex determination gene.
Self-determination theory proposes a multidimensional representation of motivation comprised of several factors said to fall along a continuum of relative autonomy. The current meta-analysis examined ...the relationships between these motivation factors in order to demonstrate how reliably they conformed to a predictable continuum-like pattern. Based on data from 486 samples representing over 205,000 participants who completed 1 of 13 validated motivation scales, the results largely supported a continuum-like structure of motivation and indicate that self-determination is central in explaining human motivation. Further examination of heterogeneity indicated that while regulations were predictably ordered across domains and scales, the exact distance between subscales varied across samples in a way that was not explainable by a set of moderators. Results did not support the inclusion of integrated regulation or the 3 subscales of intrinsic motivation (i.e., intrinsic motivation to know, to experience stimulation, and to achieve) due to excessively high interfactor correlations and overlapping confidence intervals. Recommendations for scale refinements and the scoring of motivation are provided.
Public Significance Statement
This meta-analysis demonstrates that self-determination is a central element of human motivation and indeed supports the hypothesis that motivation follows a continuum of self-determination but also that better motivation scoring methods need to be developed. These findings have significance for motivation researchers by displaying the importance of self-determination, and thereby supporting the importance of quality of motivation over quantity.
Teleost fishes, thanks to their rapid evolution of sex determination mechanisms, provide remarkable opportunities to study the formation of sex chromosomes and the mechanisms driving the birth of new ...master sex determining (MSD) genes. However, the evolutionary interplay between the sex chromosomes and the MSD genes they harbor is rather unexplored. We characterized a male-specific duplicate of the anti-Müllerian hormone (amh) as the MSD gene in Northern Pike (Esox lucius), using genomic and expression evidence as well as by loss-of-function and gain-of-function experiments. Using RAD-Sequencing from a family panel, we identified Linkage Group (LG) 24 as the sex chromosome and positioned the sex locus in its sub-telomeric region. Furthermore, we demonstrated that this MSD originated from an ancient duplication of the autosomal amh gene, which was subsequently translocated to LG24. Using sex-specific pooled genome sequencing and a new male genome sequence assembled using Nanopore long reads, we also characterized the differentiation of the X and Y chromosomes, revealing a small male-specific insertion containing the MSD gene and a limited region with reduced recombination. Our study reveals an unexpectedly low level of differentiation between a pair of sex chromosomes harboring an old MSD gene in a wild teleost fish population, and highlights both the pivotal role of genes from the amh pathway in sex determination, as well as the importance of gene duplication as a mechanism driving the turnover of sex chromosomes in this clade.
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