The in situ relationships between season of hatching, growth and condition in the southern calamary, Sepioteuthis australis

2004 ◽  
Vol 55 (4) ◽  
pp. 429 ◽  
Author(s):  
Gretta Pecl
Keyword(s):  
East Coast ◽  
Average Rate ◽  
Seasonal Patterns ◽  
Annual Species ◽  
Dynamic Nature ◽  
Growth Season ◽  
Adult Growth ◽  
Relationship Of ◽  
Rates Of Growth

This paper examines seasonal patterns in growth and condition of Sepioteuthis australis from temperate waters of Tasmania, Australia. Growth was described by a power function and was fast for a temperate species, with an average rate over the lifetime of 4–5% BW day–1. Sepioteuthis australis is an annual species, however spawning and hatching of juveniles appears to occur all year round. Analysis of individual juvenile growth demonstrated a correlation between seasonally increasing temperatures and progressively faster growth. Season of hatching also had a clear effect on adult growth; summer-hatched individuals were larger at 170–190 days of age compared with winter-hatched individuals (1002 ± 98 g and 632 ± 27 g respectively). The length–mantle weight relationship of adults was also dependent on season of hatching, with individuals hatched in summer and spring having heavier mantles at a given length than those hatched in winter or autumn. Differential rates of growth or varying levels of condition, or perhaps both, may affect the survivorship of individuals. Growth, condition and potentially lifespan of S. australis are dependent on environmental factors, with the dynamic nature of oceanographical conditions on the east coast of Tasmania resulting in a highly variable and fluctuating population structure.

The mineralogy and firing behaviour of pottery clays of the Lake Van region, eastern Turkey

Clay Minerals ◽  
2017 ◽  
Vol 52 (4) ◽  
pp. 453-468 ◽  
Author(s):  
A. Aras ◽  
S. Kiliç
Keyword(s):  
East Coast ◽  
Chemical Characterization ◽  
Mineralogical Composition ◽  
Lake Van ◽  
X Ray Diffraction ◽  
Pottery Production ◽  
X Ray ◽  
Different Types ◽  
Firing Shrinkage

AbstractThe present study focused on the mineralogical and chemical characterization and firing behaviour of clays from the Lake Van region and compared them with the same characteristics established for two ancient pot sherds. Four pottery clays collected from Kutki and Kuşluk in the Kesan Valley to the south, from Kavakbaşı to the southwest and from Bardakçı village on the east coast of Lake Van were analysed by X-ray diffraction to identify mineralogical composition (bulk clays and <2 μm fractions after heating at 300–500°C and ethylene glycol solvation). Further analyses were conducted to determine the size distribution, chemical composition and physical properties of test bodies derived from these clays. The in situ weathered schist forming the primary micaceous red clays which are suitable for local pottery production are characterized by large muscovite-sericite-illite and small calcite contents. In contrast, the Bardakçı clays are dominated by large smectite contents and are only used sparingly in mixtures of local pottery production because they undergo firing shrinkage and present drying and firing flaws in the fired bodies. Firing ranges of ~800–900°C were inferred from the mineralogy and colours of the two ancient sherds from Kutki. As a result of mineralogical analysis of fired and unfired test bodies of these pottery clays and pot sherds, two different types of pastes were determined for pottery production in the Lake Van region: metamorphic and volcanic paste, the former characterized by a calcite-poor and mica-sericite-rich matrix and the latter by large smectite and small calcite contents.

Relationship of corneal asphericity to intraocular lens power calculations after myopic laser in situ keratomileusis

2016 ◽  
Vol 42 (5) ◽  
pp. 703-709 ◽  
Author(s):  
Yosai Mori ◽  
Kimiya Shimizu ◽  
Keiichiro Minami ◽  
Kazutaka Kamiya ◽  
Nobuyuki Shoji ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
Laser In Situ Keratomileusis ◽  
Power Calculations ◽  
Intraocular Lens Power ◽  
Corneal Asphericity ◽  
Lens Power ◽  
Relationship Of

In situ biomonitoring shows seasonal patterns and environmentally mediated gaping activity in the bivalve, Pinna nobilis

2016 ◽  
Vol 163 (2) ◽  
Author(s):  
Jose R. Garcia-March ◽  
Santiago Jiménez ◽  
Miguel A. Sanchis ◽  
Sergio Monleon ◽  
Jonathan Lees ◽  
...  
Keyword(s):  
Seasonal Patterns ◽  
Pinna Nobilis

scholarly journals Incidência das Formas Imaturas de Aedes albopictus (Skuse) e Aedes aegypti (Linnaeus) no Município de Miguel Pereira, RJ, Brasil

2010 ◽  
Vol 3 (2) ◽  
pp. 55-58 ◽  
Author(s):  
Paulo Roberto Moreira Barbosa ◽  
William Costa Rodrigues ◽  
Marise Maleck de Oliveira Cabral
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Urban Areas ◽  
Rio De Janeiro ◽  
Average Rate ◽  
Public Health Problem ◽  
Waste Land ◽  
Immature Form ◽  
Relationship Of ◽  
Janeiro State

A presença de Aedes albopictus (Skuse) em área urbana representa um risco potencial do inter-relacionamento dessa espécie de mosquito com a população. Este estudo teve como objetivo identificar as formas imaturas de Ae. albopictus encontradas nos depósitos e imóveis do município de Miguel Pereira. O estudo foi realizado no período de 12 meses, ano de 2007, em 27 locais do município de Miguel Pereira, Estado do Rio de Janeiro. As larvas encontradas foram identificadas em laboratório e a análise dos dados foi calculada pelos índices de infestação predial e índice de Breteau. Os tipos de imóveis positivos foram residências (79,44% do total); terrenos baldios (2,56%); comércios (2,56%) e outros tipos de imóveis (15,04%) para Ae. albopictus, e residências (72,72% do total); comércios (6,06%); terrenos baldios (3,03%); e outros tipos de imóveis (18,18%) para Aedes aegypti (L.). Das 3731 larvas, 3562 (95,5%) eram de Ae. albopictus e 169 (4,5%) de Ae. aegypti. O mosquito Ae. albopictus mostrou-se mais presente nos criadouros que Ae. aegypti. A média do índice de infestação predial (IFP) e índice de Breteau (IB) para Ae. albopictus foi 1,0 e 1,9 e para Ae. aegypti de 0,1 e 0,1, respectivamente. As formas imaturas mais abundantemente encontradas no Município de Miguel Pereira no ano de 2007 foram de Ae. albopictus podendo futuramente se tornar um problema de saúde pública. Incidence of Aedes albopictus (Skuse) Immature Form in Miguel Pereira, RJ, Brazil. Abstract. The presence of Aedes albopictus (Skuse) in urban areas represents a potential risk of inter-relationship of this species of mosquito with the population. This study aimed to evaluate the presence of the Ae. albopictus immature forms in deposits and building at Miguel Pereira city, Rio de Janeiro State. The study was carried in the last 12 months, 2007, in 27 locations in Miguel Pereira city. The larvae were identified in laboratory and data analysis was calculated by indicators of building infestation index and the Breteau index. The positive buildings were: residential (79.44% of total); waste land (2.56%), shopping (2.56%) and other types of buildings (15.04%) to Ae. albopictus, and homes (72.72% of total), shopping (6.06%); waste land (3.03%) and other types of buildings (18.18%) to Ae. aegypti (L.). The larvae (3731) collected, 3562 (95.5%) were Ae. albopictus and 169 (4.5%) were Ae. aegypti. The Ae. albopictus are more present in breeding that Ae. aegypti. The average rate of building infestation index (IFP) and Breteau index (IB) for Ae. albopictus was 1.0 and 1.9 and for Ae. aegypti was 0.1 and 0.1, respectively. The Ae. albopictus immature larvae forms were more abundantly found in the Miguel Pereira city in 2007; in future it may become a public health problem.

Dual oxidase (DUOX) system genes defects in Children with Congenital Hypothyroidism

Endocrinology ◽  
2021 ◽  
Author(s):  
Fengqi Wang ◽  
Li Xiaole ◽  
Ruixin Ma ◽  
Dehua Zhao ◽  
Shiguo Liu
Keyword(s):  
Congenital Hypothyroidism ◽  
Functional Domain ◽  
Target Region ◽  
Pathogenic Variants ◽  
Significant Difference ◽  
Ef Hand ◽  
Dual Oxidase ◽  
Variation Rate ◽  
Relationship Of

Abstract Purpose The objectives of this study were to analyze the distribution of Dual oxidase (DUOX) system genes (containing DUOX2, DUOX1, DUOXA2 and DUOXA1) variants in children with congenital hypothyroidism and their phenotypes. Methods Target region sequencing technology was performed on DUOX system genes among 606 congenital hypothyroidism (CH) subjects covering all the exon and intron regions. Detailed clinical data were collected for statistical analysis. Results A total of 95 suspected pathogenic variants were detected in the DUOX system genes, showing a 39.11% rate in variant carrying (237/606). DUOX2 was with the highest rate in this study. There were statistical difference in maximum adjusted dose and current dose of L-T4 between the DUOX system genes non-mutated group with the mutated group (p&lt;0.001; p&lt;0.001). The cases in DUOX system genes mutated group were more likely to develop into transient CH (χ 2 = 23.155, p&lt;0.001) and more likely to manifested as goiter or gland-in-situ (χ 2 = 66.139, p&lt;0.001). In addition, there was no significant difference in clinical characteristics between DUOX system genes mono-allelic and non mono-allelic. Although 20% of the variants affected the functional domain regions (EF hand, and FAD and NADPH binding sites), there was no significant effect on the phenotype severity whether the variation is located in the functional domain regions. Conclusions Our results showed the high variation rate of DUOX2 in the DUOX system genes among the Chinese CH patients. And the complex genotype-phenotype relationship of DUOX system genes broadened the understanding of CH phenotype spectrum.

Electrophysiology of the in situ contractile vacuole complex of Paramecium reveals its membrane dynamics and electrogenic site during osmoregulatory activity.

1998 ◽  
Vol 201 (3) ◽  
pp. 451-460 ◽  
Author(s):  
T Tominaga ◽  
R D Allen ◽  
Y Naitoh
Keyword(s):  
Proton Pump ◽  
Electrical Potential ◽  
Membrane Dynamics ◽  
Contractile Vacuole ◽  
Vacuole Membrane ◽  
Input Capacitance ◽  
Linear Current ◽  
Relationship Of ◽  
Voltage Relationship

In the freshwater protozoan Paramecium multomicronucleatum, excess cytosolic water, acquired osmotically, is segregated and expelled to the cell exterior through the activity of the contractile vacuole complex. This process keeps the cell volume constant. The electrophysiological parameters of the organelle were measured in situ using a fine-tipped microelectrode inserted into the contractile vacuole, the exocytotic vesicle of the organelle to which the segregated fluid is transported before being expelled to the exterior. The input capacitance decreased markedly immediately before fluid expulsion and regained its previous value when fluid filling resumed after fluid expulsion. This change in the capacitance proved that the contractile vacuole became disconnected from its radial arms, which project from the vacuole, before fluid expulsion occurred and then reconnected with the arms after fluid expulsion. A positive electrical potential was recorded from the contractile vacuole only when it was connected to the radial arms. This implies that the electrogenic mechanism resides exclusively in the radial arms and supports the idea that the decorated spongiomes, V-type proton-pump-covered terminal tubules of the radial arms that end blindly in the cytosol, are electrogenic. The linear current&shy;voltage relationship of the contractile vacuole membrane also implies that few voltage-activated ion channels are present in the membrane. To explain the movement of water into the contractile vacuole complex, we favour the hypothesis that the potential generated across the decorated spongiome membrane can be used to drive counter-anions from the cytosol into the lumen of the complex. The anions could then act as an osmolite to pull cytosolic water into the lumen of the organelle.

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