Microfluidic Sensor System for Initial Growth Rate Determination of Small Bacteria Samples

2020 ◽  
Vol 20 (13) ◽  
pp. 6849-6855
Author(s):  
Camilla Konermann ◽  
Frank Bunge ◽  
Sander van den Driesche ◽  
Michael J. Vellekoop
1996 ◽  
Vol 54 (22) ◽  
pp. 15690-15694 ◽  
Author(s):  
A. Audouard ◽  
J. Dural ◽  
M. Toulemonde ◽  
A. Lovas ◽  
G. Szenes ◽  
...  

AIChE Journal ◽  
1987 ◽  
Vol 33 (1) ◽  
pp. 121-129 ◽  
Author(s):  
R. C. Zumstein ◽  
R. W. Rousseau

2012 ◽  
Vol 53 (4) ◽  
pp. 729-739 ◽  
Author(s):  
Kenji Yano ◽  
Tomonori Takashi ◽  
Shiro Nagamatsu ◽  
Mikiko Kojima ◽  
Hitoshi Sakakibara ◽  
...  

2012 ◽  
Vol 12 (4) ◽  
pp. 68-73 ◽  
Author(s):  
Matheus Vieira Volcan ◽  
Alinca Peres da Fonseca ◽  
Mário Roberto Chim Figueiredo ◽  
Luís André Sampaio ◽  
Ricardo Berteaux Robaldo

This study evaluated the effect of temperature on growth of Austrolebias nigrofasciatus, an endemic and threatened annual killifish species of the Patos-Mirim lagoon system in Southern Brazil. In order to verify the effect of temperature on initial growth of A. nigrofasciatus, eggs stored in the laboratory were hatched and juveniles reared for eight weeks at 16 and 22 ºC. The standard length of newly hatched fishes was 4.67 ± 0.25 mm and after eight weeks they reached 23.68 ± 3.73 and 22.68 ± 5.36 mm, respectively at 16 and 22 ºC. However, initial growth of fish reared at 22 ºC was faster and they reached sexual dimorphism at an earlier age compared to those reared at 16 ºC. Final length of females reared at 22 ºC was 23.00 ± 2.83 mm, they were significantly larger than those reared at 16 ºC (17.91 ± 2.47 mm). Males were significantly larger than the females at 16 ºC, but there was no difference for growth between sexes of fish reared at 22 ºC. The sex ratios were 1:0.6 and 1:1.1 (M:F) at 16 ºC and 22 ºC, respectively, suggesting temperature determination of phenotypic sex. Considering the results, it appears that juveniles to be developed in captivity should be kept at 22 ºC during the first six weeks of life, thus ensuring a higher growth rate until puberty.


1979 ◽  
Vol 45 (2) ◽  
pp. 643-646 ◽  
Author(s):  
A. B. Silverstein

The semi-longitudinal method was used to trace changes in the mental ages of 906 institutionalized mentally retarded subjects as a function of chronological age, and equations were fitted to the resulting growth curves. Sex differences proved to be relatively slight. The higher levels of retardation had a higher initial growth rate and a more pronounced decline at higher age levels than did the lower levels, but they did not have a longer growing season. In all but the last respect, the findings resembled those obtained by Fisher and Zeaman (1970).


2018 ◽  
Vol 39 (1) ◽  
pp. 1-22 ◽  
Author(s):  
Nikolay S. Peev

Abstract Characterization of the liquid phase epitaxial growth is in the scope of the present paper. The determination of the main parameters of the process such as the stationary growth rate, the time constant, the stationary supercooling, the kinetic coefficient, the initial growth rate, the crystallization mechanism are under consideration. Pursuing this aim a differential equation has been obtained which allows obtaining the dependences of the supersaturation, the growth rate and the growth layer thickness on the duration of growth. These dependences allow the determination of the above mentioned process parameters. Two mechanisms of crystallization are considered - the normal growth and the growth assisted by the screw dislocations. The two dimensional nuclei growth has not been considered because an analytical solution of the equation was not possible. Some of the theoretical contentions are confirmed by the experiments. Using the obtained values of the parameters dependences are defined. Good agreement between theory and experimental results is observed.


2019 ◽  
Author(s):  
Shoya Iwanami ◽  
Kosaku Kitagawa ◽  
Yusuke Asai ◽  
Hirofumi Ohashi ◽  
Kazane Nishioka ◽  
...  

AbstractViruses proliferate through both genome replication inside infected cells and transmission to new target cells or to new hosts. Each viral genome molecule in infected cells is used either for amplifying the intracellular genome as a template (“stay-at-home strategy”) or for packaging into progeny virions to be released extracellularly (“leaving-home strategy”). The balance between these strategies is important for both initial growth and transmission of viruses. In this study, we used hepatitis C virus (HCV) as a model system to study the functions of viral genomic RNA in both RNA replication in cells and in progeny virus assembly and release. Using viral infection assays combined with mathematical modelling, we characterized the dynamics of two different HCV strains (JFH-1, a clinical isolate, and Jc1-n, a laboratory strain), which have different viral assembly and release characteristics. We found that 1.27% and 3.28% of JFH-1 and Jc1-n intracellular viral RNAs, respectively, are used for producing and releasing progeny virions. Analysis of the Malthusian parameter of the HCV genome (i.e., initial growth rate) and the number of de novo infections (i.e., initial transmissibility) suggests that the leaving-home strategy provides a higher level of initial transmission for Jc1-n, while, in contrast, the stay-at-home strategy provides a higher initial growth rate for JFH-1. Thus, theoretical-experimental analysis of viral dynamics enables us to better understand the proliferation strategies of viruses. Ours is the first study to analyze stay-leave trade-offs during the viral life cycle and their significance for viral proliferation.


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