730 research outputs found
Variations on inductive-recursive definitions
No full textDybjer and Setzer introduced the definitional principle of inductive-recursively defined families — i.e. of families ( U : Set , T : U → D ) such that the inductive definition of U may depend on the recursively defined T — by defining a type DS D E of codes. Each c : DS D E defines a functor J c K : Fam D → Fam E , and ( U , T ) = μ J c K : Fam D is exhibited as the initial algebra of J c K . This paper considers the composition of DS -definable functors: Given F : Fam C → Fam D and G : Fam D → Fam E , is G ◦ F : Fam C → Fam E DS -definable, if F and G are? We show that this is the case if and only if powers of families are DS -definable, which seems unlikely. To construct composition, we present two new systems UF and PN of codes for inductive-recursive definitions, with UF ↪ → DS ↪ → PN . Both UF and PN are closed under composition. Since PN defines a potentially larger class of functors, we show that there is a model where initial algebras of PN -functors exist by adapting Dybjer-Setzer’s proof for DS
Archives affabulatoires, engagisme queer et ZOM-FAM de Kama La Mackerel
No full textL’auteure avance que le recueil de poésie ZOM-FAM, de Kama La Mackerel, constitue une archive affabulatoire de l’engagisme queer (queer indenture). Elle situe d’abord son recueil dans le contexte des histoires d’esclavage et d’engagisme de l’île Maurice, pour observer ensuite la façon dont ZOM-FAM offre une optique queer par des approches décoloniales au langage, ainsi qu’une esthétique qui éclaire de nouvelles généalogies d’engagisme queer et de genre décolonial.The author proposes that Kama La Mackerel’s ZOM-FAM is a fabulatory archive for queer indenture. She contextualizes this book of poems within Mauritius and the island’s histories of enslavement and indenture and observe how ZOM-FAM offers a queers lens through decolonial approaches to language alongside an aesthetic that illuminates new genealogies in queer indenture and decolonial gender.La autora afirma que la colección de poesía ZOM-FAM, de Kama La Mackerel, constituye un archivo ficticio de engagisme queer (queer indenture). En primer lugar, sitúa su colección en el contexto de los relatos de esclavitud y de engagisme de la Isla Mauricio, luego observa cómo ZOM-FAM ofrece una perspectiva queer a través de enfoques decoloniales del lenguaje, así como una estética que alumbra nuevas genealogías de engagisme queer y de género decolonial
Magnetospirillum sulfuroxidans sp. nov., capable of sulfur-dependent lithoautotrophy and a taxonomic reevaluation of the order Rhodospirillales
No full textA spiral-shaped, highly motile bacterium was isolated from freshwater sulfidic sediment. Strain J10 T is a facultative autotroph utilizing sulfide, thiosulfate, and sulfur as the electron donors in microoxic conditions. Despite high 16S rRNA gene sequence sequence identity to Magnetospirillum gryphiswaldense MSR-1 T (99.6 %), digital DNA-DNA hybridisation homology and average nucleotide identity between the two strains was of the different species level (25 % and 83 %, respectively). Strain J10 T is not magnetotactic. The DNA G + C content of strain J10 T is 61.9 %. The predominant phospholipid ester-linked fatty acids are C18:1ω7, C16:1ω7, and C16:0. Strain J10 T (=DSM 23205 T = VKM B-3486 T) is the first strain of the genus Magnetospirillum showing lithoautotrophic growth and is proposed here as a novel species, Magnetospirillum sulfuroxidans sp. nov. In addition, we propose to establish a framework for distinguishing genera and families within the order Rhodospirillales based on phylogenomic analysis using the threshold values for average amino acid identity at ̴ 72 % for genera and ̴ 60 % for families. According to this, we propose to divide the existing genus Magnetospirillum into three genera: Magnetospirillum, Paramagnetospirillum, and Phaeospirillum, constituting a separate family Magnetospirillaceae fam. nov. in the order Rhodospirillales. Furthermore, phylogenomic data suggest that this order should accomodate six more new family level groups including Magnetospiraceae fam. nov., Magnetovibrionaceae fam. nov., Dongiaceae fam. nov., Niveispirillaceae fam. nov., Fodinicurvataceae fam. nov., and Oceanibaculaceae fam. nov. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.BT/Environmental Biotechnolog
Dethiobacteraceae fam. nov.
No full textDe.thi’o.bac.ter.a.ce.a.e. N.L. masc. n. Dethiobacter, the type genus of the family; L. fem. pl. n. suff. -aceae, ending to denote a family; N.L. fem. pl. n. Dethiobacteraceae, the family of the genus Dethiobacter. The family Dethiobacteraceae includes obligately anaerobic, moderately salt-tolerant, and obligately alkaliphilic bacteria able to grow chemolithoautotrophically by elemental sulfur disproportionation and fixingCO2 by the Wood–Ljungdahl pathway. The two strains currently known in pure culture are both isolated from saline soda lakes. H2 can serve as an additionalelectron donor for sulfur and thiosulfate reduction. The family consists of a single genus Dethiobacter with the type species Dethiobacter alkaliphilus. DNA G +C content (%): 48.3–48.5 (genomes of two isolates). Type genus: Dethiobacter Sorokin et al. 2008, VL123.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work publicBT/Environmental Biotechnolog
Behavioural counselling to increase consumption of fruit and vegetables in low income adults : randomised trial
No full textObjective To measure the effect of brief behavioural
counselling in general practice on patients’
consumption of fruit and vegetables in adults from a
low income population.
Design Parallel group randomised controlled trial.
Setting Primary health centre in a deprived, ethnically
mixed inner city area.
Participants 271 patients aged 18-70 years without
serious illness.
Intervention Brief individual behavioural counselling
based on the stage of change model; time matched
nutrition education counselling.
Main outcome measures Self reported number of
portions of fruit and vegetables eaten per day, plasma
β carotene, α tocopherol, and ascorbic acid
concentrations, and 24 hour urinary potassium
excretion. Assessment at baseline, eight weeks, and 12
months.
Results Consumption of fruit and vegetables
increased from baseline to 12 months by 1.5 and 0.9
portions per day in the behavioural and nutrition
groups (mean difference 0.6 portions, 95% confidence
interval 0.1 to 1.1). The proportion of participants
eating five or more portions a day increased by 42%
and 27% in the two groups (mean difference 15%, 3%
to 28%). Plasma β carotene and α tocopherol
concentrations increased in both groups, but the rise
in β carotene was greater in the behavioural group
(mean difference 0.16 μmol/l, 0.001 μmol/l to 1.34
μmol/l). There were no changes in plasma ascorbic
acid concentrations or urinary potassium excretion.
Differences were maintained when analysis was
restricted to the 177 participants with incomes
≤ £400 (€596, $640) a week.
Conclusions Brief individual counselling in primary
care can elicit sustained increases in consumption of
fruit and vegetables in low income adults in the
general population
Phylogenetic study of the Nemaliales (Rhodophyta) based on large-subunit ribosomal DNA sequences supports segregation of the Scinaiaceae fam. nov. and resurrection of Dichotomaria Lamarck
No full textGene sequence data have been newly obtained for 18 species in 13 genera of the order Nemaliales (Rhodophyta), allowing for the first time a relatively comprehensive molecular phylogenetic appraisal of the order. The phylogenetic trees generated from these data support the recognition of three families: (i) the Liagoraceae as presently constituted; (ii) a reduced Galaxauraceae includingActinotrichia,Galaxaura (sensu lato), andTricleocarpa; and (iii) a new family, Scinaiaceae, segregated from the Galaxauraceae and including the generaScinaia,Gloiophloea,Nothogenia, and probablyWhidbeyella. The four genera of the Scinaiaceae differ from the newly circumscribed Galaxauraceae in being uncalcified, and having heteromorphic life histories in which the tetrasporophyte is much reduced and filamentous or crustose. This type of life history is found in onlyTricleocarpaof the Galaxauraceae. The results also showGalaxaurato be para/polyphyletic ifActinotrichiaandTricleocarpaare recognized. To remedy this, theGalaxaura marginataspecies complex,Galaxaura diesingiana, andGalaxaura obtusataare removed from the genus and placed in the resurrectedDichotomariaLamarck.Galaxaura marginata, presently thought to be wide-ranging and morphologically variable, is shown to comprise several species. As a consequence,Galaxaura teneraKjellman andBrachycladia australisSonder are removed from the synonymy ofG. marginataand restored as independent species inDichotomariafor South African and Australian isolates, respectively. The Liagoraceae is shown to encompass genera previously placed in the segregate families Nemaliaceae and Dermonemataceae, and the value of the reproductive characters used to define those taxa is discussed. [ABSTRACT FROM AUTHOR]Peer reviewedfinal article publishedDichotomariaScinaiaceae fam. novphylogenyNemalialesLiagoraceaeGalaxaura marginataGalaxauracea
Bullying in the family : sibling bullying
No full textSibling relationships have a significant and lasting impact on children’s development. Many siblings experience some occasional conflict, however, up to 40% are exposed to sibling bullying every week, a repeated and harmful form of intra-familial aggression. Evidence on the precursors, relationship with peer bullying, and mental health consequences of sibling bullying are reviewed. Parenting quality and behaviour are the intra-familial factors most strongly related to bullying between siblings. Sibling bullying increases the risk of being involved in peer bullying, and is independently associated with concurrent and early adult emotional problems, including distress, depression and self-harm. The effects appear to be cumulative, with those bullied by both siblings and peers having highly increased emotional problems, likely because they have no safe place to escape from bullying. The link between sibling and peer bullying suggests interventions should start at home. Health professionals should ask about sibling bullying and interventions are needed for families to prevent and reduce the health burden associated with sibling bullying
Sulfurivermis fontis gen. nov., sp nov., a sulfur-oxidizing autotroph, and proposal of Thioprofundaceae fam. nov
No full textA novel Gram-stain-negative, chemolithoautotrophic sulfur oxidizer, strain JG42(T), was isolated from a hot spring microbial mat. As an electron donor for autotrophic growth, strain JG42(T) utilized sulfide, thiosulfate, tetrathionate and elemental sulfur. Cells of strain JG42(T) were oxidase-positive and catalase-negative. The G+C content of the genomic DNA was 65 mol%. The predominant cellular fatty acid was C-16:0. Phylogenetic analysis of the 16S rRNA gene indicated that strain JG42(T) belonged to the order Chromatiales, but sequence similarities to the known species were less than 94 %. On the basis of its properties, strain JG42(T) (= DSM 104776(T) = NBRC 112696(T)) is proposed as the type strain of a novel species of a new genus, Sulfurivermis fontis gen. nov., sp. nov., which belongs to the family Thioalkalispiraceae. A new family, Thioprofundaceae fam. nov., is also proposed to accommodate the genus Thioprofundum, transferred from the family Thioalkalispiraceae
Natronogracilivirga saccharolytica gen. nov., sp. nov. and Cyclonatronum proteinivorum gen. nov., sp. nov., haloalkaliphilic organotrophic bacteroidetes from hypersaline soda lakes forming a new family Cyclonatronaceae fam. nov. in the order Balneolales
No full textTwo heterotrophic bacteroidetes strains were isolated as satellites from autotrophic enrichments inoculated with samples from hypersaline soda lakes in southwestern Siberia. Strain Z-1702 T is an obligate anaerobic fermentative saccharolytic bacterium from an iron-reducing enrichment culture, while Ca. Cyclonatronum proteinivorum Omega T is an obligate aerobic proteolytic microorganism from a cyanobacterial enrichment. Cells of isolated bacteria are characterized by highly variable morphology. Both strains are chloride-independent moderate salt-tolerant obligate alkaliphiles and mesophiles. Strain Z-1702 T ferments glucose, maltose, fructose, mannose, sorbose, galactose, cellobiose, N-acetyl-glucosamine and alpha-glucans, including starch, glycogen, dextrin, and pullulan. Strain Omega T is strictly proteolytic utilizing a range of proteins and peptones. The main polar lipid fatty acid in both strains is iso-C 15:0, while other major components are various C 16 and C 17 isomers. According to pairwise sequence alignments using BLAST Gracilimonas was the nearest cultured relative to both strains (<90% of 16S rRNA gene sequence identity). Phylogenetic analysis placed strain Z-1702 T and strain Omega T as two different genera in a deep-branching clade of the new family level within the order Balneolales with genus. Based on physiological characteristics and phylogenetic position of strain Z-1702 T it was proposed to represent a novel genus and species Natronogracilivirga saccharolityca gen. nov., sp. nov. (= DSMZ 109061 T =JCM 32930 T =VKM B 3262 T). Furthermore, phylogenetic and phenotypic parameters of N. saccharolityca and C. proteinivorum gen. nov., sp. nov., strain Omega T (=JCM 31662 T, =UNIQEM U979 T), make it possible to include them into a new family with a proposed designation Cyclonatronaceae fam. nov. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.BT/Environmental Biotechnolog
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