Shrinkage of Prochilodus lineatus (Valenciennes, 1847) larvae preserved in either ethyl-alcohol or formalin in relation to their developmental stage and feeding condition

2013 ◽  
Vol 30 (1) ◽  
pp. 140-144 ◽  
Author(s):  
M. I. Gómez ◽  
S. Sánchez ◽  
C. M. Fuentes
Keyword(s):  
Developmental Stage ◽  
Ethyl Alcohol ◽  
Feeding Condition ◽  
Prochilodus Lineatus

scholarly journals Ontogenetic changes in DNA and RNA content of laboratory-reared Prochilodus lineatus larvae: use of RNA/DNA ratios as indicators of nutritional condition

2018 ◽  
Vol 69 (3) ◽  
pp. 455 ◽  
Author(s):  
M. V. Diaz ◽  
M. I. Gómez ◽  
S. Sánchez ◽  
C. M. Fuentes
Keyword(s):  
Developmental Stages ◽  
Nutritional Condition ◽  
The Other ◽  
Ontogenetic Changes ◽  
Feeding Condition ◽  
Cellular Division ◽  
Prochilodus Lineatus ◽  
Dna And Rna ◽  
Rna Content ◽  
Food Provision

The aims of the present study were to describe the ontogenetic performance of DNA and RNA content, as well as to assess the nutritional condition of Prochilodus lineatus larvae reared under different feeding treatments. The experiment consisted of two parts, the first 6–14 days after hatching (DAH) and the second 15–21 DAH. In the first part of the experiment, larvae were kept under one of two feeding treatments: fed or starved. During the second part of the experiment, larvae were kept under one of four treatments: fed, fed until 14 DAH and later starved, starved until 14 DAH and fed later or starved. It is of note that the size and weight reached of larvae that were starved during early development and later received food were higher than those of than larvae in the other feeding treatments. In addition, instantaneous growth rates were higher and nutritional condition was better in larvae that were initially starved and fed later. The availability of food following a period of starvation seems to trigger larval metabolism and cellular division. Consequently, we recommend maintaining appropriate food provision in the aquaculture of P. lineatus larvae, especially in advanced developmental stages. We verified that RNA/DNA ratio is affected by the feeding condition and that it is sensitive enough to promptly reflect changes in feeding conditions of P. lineatus larvae. Thus, the RNA/DNA ratio could be used to assess nutritional condition of both wild and cultured P. lineatus larvae.

The butterfly martensite nucleation in an iron and nickel alloy

1990 ◽  
Vol 48 (4) ◽  
pp. 906-907
Author(s):  
Q.Z. Chen ◽  
X.F. Wu ◽  
T. Ko
Keyword(s):  
Nickel Alloy ◽  
Ethyl Alcohol ◽  
Dislocation Structure ◽  
Martensite Transformation ◽  
Room Temperature ◽  
The Matrix

Some butterfly martensite nuclei were observed in an Fe-27.6Ni-0.89V-0.05C alloy. The alloy was austenitized at 1200°C for 1 hour. Some samples were aged at 850° C for 40 minutes and quenched in 10% brine at room temperature. All the samples were cooled in ethyl alcohol for martensite transformation.A nucleus in an unaged specimen is shown in Fig.1. The nucleus has certain contrast different from the matrix and is shaped like one wing of a butter fly martensite. The SADP of the circled region is measured to be: da=dh, and approximate to dγ(111) and dm(110) with ∠AOB = 55° . It is similar to [011]f.c.c and b patterns in the anglez ∠AOB and the ratio ra/rb, respectively. The SADP shows that the structure of the nucleus is between f.c.c and b.c.c. The dislocation structure within the nucleus is shown in Fig.2. Their Burgers vectors and line directions are also given in it. There are many long dislocations near it without dislocations piled up as shown in Fig.3.Long dislocations are closed at one end as an envelope.

Neural correlates of postformal stages of reasoning: Biological determinants of developmental stage.

2016 ◽  
Vol 21 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Sofia Ribeirinho Leite ◽  
Cory David Barker ◽  
Marc G. Lucas
Keyword(s):  
Developmental Stage ◽  
Neural Correlates ◽  
Biological Determinants
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