The growth, growth energy, and ageing of the chicken’s heart

The growth energy of the chicken's heart is defined, measured, and found to decline exponentially with age; it proves to be proportional to the specific growth rate of the heart in vivo . The growth of the heart can therefore be described by a Gompertz equation. The relation between growth, cell movement, metabolism and differentiation is discussed, as well as the relevance of the Gompertz equation to problems of relative growth and senescence.

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CreA influences the metabolic fluxes of Aspergillus nidulans during growth on glucose and xylose

Microbiology ◽

10.1099/mic.0.27787-0 ◽

2005 ◽

Vol 151 (7) ◽

pp. 2209-2221 ◽

Cited By ~ 33

Author(s):

Helga David ◽

Astrid Mørkeberg Krogh ◽

Christophe Roca ◽

Mats Åkesson ◽

Jens Nielsen

Keyword(s):

Growth Rate ◽

Specific Growth Rate ◽

Mutant Strain ◽

Pentose Phosphate Pathway ◽

Reference Strain ◽

Specific Growth ◽

Pentose Phosphate ◽

Central Metabolism ◽

Metabolic Fluxes

The physiological phenotype of Aspergillus nidulans was investigated for different genetic and environmental conditions of glucose repression through the quantification of in vivo fluxes in the central carbon metabolism using 13C-metabolic-flux analysis. The particular focus was the role of the carbon repressor CreA, which is the major regulatory protein mediating carbon repression in many fungal species, in the primary metabolism of A. nidulans. Batch cultivations were performed with a reference strain and a deletion mutant strain (creAΔ4) using [1-13C]glucose as carbon source. The mutant strain was also grown on a mixture of [1-13C]glucose and unlabelled xylose. Fractional enrichment data were measured by gas chromatography-mass spectrometry. A model describing the central metabolism of A. nidulans was used in combination with fractional enrichment data, and measurements of extracellular rates and biomass composition for the estimation of the in vivo metabolic fluxes. The creA-mutant strain showed a lower maximum specific growth rate than the reference strain when grown on glucose (0·11 and 0·25 h−1, respectively), whereas the specific growth rate of the mutant strain grown on the glucose/xylose mixture was identical to that on glucose (0·11 h−1). Different patterns and increased levels of extracellular polyols were observed both upon deletion of the creA gene and upon addition of xylose to the growth medium of the mutant strain. Concerning metabolic fluxes, the major change observed in the flux distribution of A. nidulans upon deletion of the creA gene was a 20 % decrease in the flux through the oxidative part of the pentose-phosphate pathway. Addition of xylose to the growth medium of the mutant resulted in an increase of about 40 % in the activity of the oxidative part of the pentose-phosphate pathway, as well as decreases in the fluxes through the Embden–Meyerhof–Parnas pathway and the tricarboxylic acid cycle (in the range of 20–30 %). The derepression of key pathways leads to alterations in the demands for cofactors, thereby imposing changes in the central metabolism due to the coupling of the many different reactions via the redox and energy metabolism of the cells.

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Pakan diameter berbeda bagi pertumbuhan benih sidat (Anguilla sp)

e-Journal BUDIDAYA PERAIRAN ◽

10.35800/bdp.3.3.2015.10409 ◽

2015 ◽

Vol 3 (3) ◽

Author(s):

Dairi Y.L Airin ◽

Cyska Lumenta

Keyword(s):

Growth Rate ◽

Experimental Design ◽

Specific Growth Rate ◽

Feed Efficiency ◽

Specific Growth ◽

Growth Efficiency ◽

Daily Consumption ◽

Relative Growth ◽

Randomized Design ◽

Powder Diameter

The objective of research was to establish the effect of different powder diameter on growth, efficiency value and daily consumption of eel seed. This research was conducted at the Laboratory of Aquaculture Technology, Faculty of Fisheries and Marine Sciences Sam Ratulangi University. Experimental design used was Complete Randomized Design with four treatments, each with three replication. Variables analysed consisted of relative growth, specific growth rate, feed efficiency value and daily comsumption. Results showed that treatment A with poder diameter of 0.125 mm displayed the best relative growth (105.356%), Specific growth (1.29%), feed efficiency value (6,431%), and daily consumption (0.813%). AS conclusion, feed with diameter 0.125 mm was utilized effectively by eel seed. Keywords: relative growth, specific growth rate, feed efficiency value. and daily comsumption, Anguilla sp

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Effects of Some Feed Suplements Types to the Growth of Javaen Barb/Brek Fish (Puntius orphoides) Second Filial as Domestication Product

Biosaintifika Journal of Biology & Biology Education ◽

10.15294/biosaintifika.v8i3.5517 ◽

2016 ◽

Vol 8 (3) ◽

pp. 278

Author(s):

Priyo Susatyo ◽

Sugiharto Sugiharto ◽

Hana Hana ◽

Titi Chasanah

Keyword(s):

Growth Rate ◽

Specific Growth Rate ◽

Relative Growth Rate ◽

Specific Growth ◽

Biology Education ◽

Wild Fish ◽

Feed Conversion ◽

Additional Food ◽

Relative Growth ◽

Randomized Design

Aquaculture can be improved by a diversified approach in the form of domestication research of a wild fish. The research has been done by cultivating Javaen Barb/Brek (Puntius orphoides) from Serayu river, Banyumas at a natural pond and laboratory scale. Brek fish is relative slow in growth and development of gonad. This research is aimed to determine: (1) the rate of general growth of Brek in the provision of some kinds of additional food; (2) Relative Growth Rate (RGR); (3) Specific Growth Rate (SGR) and Feed Conversion (FC). The research used experimental methods. The method was a completely randomized design (CRD) of 4 treatments and 3 replicationsof: A = 100% pellet; B = 70% soybean sprout and 30% pellet; C = 70% Ipomoea aquatica leaf and 30% pellet; D = 35% soybean sprouts, 35% I. aquatica leaf and 30% pellet. Quantitative data were analysed by analysis of variance (ANOVA) of the fishes growth.The results show influence of feed types to the Relative Growth Rate (RGR) of Javaean Barb. The best RGR with the value of 72.40 was given by feed types in the D combination. Meanwhile, Specific Growth Rate (SGR) and Feed Conversion (FC) were not affected by the feed types. The study were expected to provide suggestions for efficient feeding techniques in attempts at domestication of wild fish.How to CiteSusatyo, P., Sugiharto, S., Hana, H., & Chasanah, T. (2016). Effects of Some Feed Suplements Types to The Growth of Javaen Barb/Brek Fish (Puntius orphoides) Second Filial As Domestication Product. Biosaintifika: Journal of Biology & Biology Education, 8(3), 278-285.

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