Journal of Experimental Biology
Công bố khoa học tiêu biểu
* Dữ liệu chỉ mang tính chất tham khảo
Sắp xếp:
Proteolytic Activity of the Midgut in Relation to Feeding in the Beetles Tenebrio Molitor L. and Dytiscus Marginalis L.
Journal of Experimental Biology - Tập 33 Số 2 - Trang 311-324 - 1956
ABSTRACT Where quantitative methods have been applied to the study of insect
digestion, enzyme activity has generally been shown to increase after feeding,
often with change in location of maximum enzyme concentration (Schlöttke, 1937
Or-c ; Duspiva, 1939; Day & Powning, 1949; Fisk & Shambaugh, 1952). The most
marked responses described by these authors occur in carnivorous and
blood-sucking insec...
The Effects of Increased Protein Intake on Kidney Size and Function
Journal of Experimental Biology - Tập 201 Số 13 - Trang 2081-2090 - 1998
ABSTRACT In endothermic vertebrates, long-term increases in metabolic energy
demand are often associated with increases in food intake and accompanied by
increases in organ mass. Wide-scale increases in organ mass have often been
attributed to a metabolic response to increased energy intake and utilization.
On a constant diet, however, increased food intake is also associated with
increased protei...
Scaling of atp-supplying enzymes, myofibrillar proteins and buffering capacity in fish muscle: Relationship to locomotory habit
Journal of Experimental Biology - Tập 149 Số 1 - Trang 319-333 - 1990
ABSTRACT Pelagic fishes with an ability to swim in strong bursts have previously
been shown to have large size-dependent increases (positive allometric scaling
exponents) in the activities of glycolytic enzymes in white skeletal muscle.
This scaling of glycolytic activity has been hypothesized to provide the
anaerobic power supporting the size-independence of relative burst swimming
speeds (body l...
The origin of allometric scaling laws in biology from genomes to ecosystems: towards a quantitative unifying theory of biological structure and organization
Journal of Experimental Biology - Tập 208 Số 9 - Trang 1575-1592 - 2005
SUMMARYLife is the most complex physical phenomenon in the Universe, manifesting
an extraordinary diversity of form and function over an enormous scale from the
largest animals and plants to the smallest microbes and subcellular units.
Despite this many of its most fundamental and complex phenomena scale with size
in a surprisingly simple fashion. For example, metabolic rate scales as the
3/4-powe...
Allometric scaling in centrarchid fish: origins of intra- and inter-specific variation in oxidative and glycolytic enzyme levels in muscle
Journal of Experimental Biology - Tập 210 Số 21 - Trang 3798-3804 - 2007
SUMMARYThe influence of body size on metabolic rate, muscle enzyme activities
and the underlying patterns of mRNA for these enzymes were explored in an effort
to explain the genetic basis of allometric variation in metabolic enzymes. We
studied two pairs of sister species of centrarchid fish: black bass(largemouth
bass Micropterus salmoides and smallmouth bass Micropterus dolomieui) and
sunfish (p...
Maintenance of Neutral Buoyancy by Depth Selection in the Loggerhead Turtle Caretta Caretta
Journal of Experimental Biology - Tập 203 Số 19 - Trang 2967-2975 - 2000
ABSTRACT Time-series data of swimming speed and dive depth were recorded in six
female loggerhead turtles Caretta caretta during the internesting period. The
dive profiles of all animals indicated that they stayed at particular depths
without swimming and that these depths were correlated with dive duration. These
results support the hypothesis that lung air is used to achieve neutral buoyancy
in ...
Differential expression of gill Na+,K+-ATPaseα- and β-subunits, Na+,K+,2Cl-cotransporter and CFTR anion channel in juvenile anadromous and landlocked Atlantic salmonSalmo salar
Journal of Experimental Biology - Tập 210 Số 16 - Trang 2885-2896 - 2007
SUMMARYThis study examines changes in gill Na+,K+-ATPase(NKA) α- and β-subunit
isoforms,Na+,K+,2Cl- cotransporter (NKCC) and cystic fibrosis transmembrane
conductance regulator (CFTR I and II) in anadromous and landlocked strains of
Atlantic salmon during parr-smolt transformation, and after seawater (SW)
transfer in May/June. Gill NKA activity increased from February through April,
May and June a...
Time course of osmoregulatory and metabolic changes during osmotic acclimation in Sparus auratus
Journal of Experimental Biology - Tập 208 Số 22 - Trang 4291-4304 - 2005
SUMMARY Changes in different osmoregulatory and metabolic parameters over time
were assessed in gills, kidney, liver and brain of gilthead sea bream Sparus
auratus transferred either from seawater (SW, 38 p.p.t.) to hypersaline water
(HSW, 55 p.p.t.) or from SW to low salinity water (LSW, 6 p.p.t.) for 14 days.
Changes displayed by osmoregulatory parameters revealed two stages during
hyperosmotic ...
Variation in salinity tolerance, gill Na+/K+-ATPase,Na+/K+/2Cl– cotransporter and mitochondria-rich cell distribution in three salmonids Salvelinus namaycush, Salvelinus fontinalis and Salmo salar
Journal of Experimental Biology - Tập 210 Số 6 - Trang 1015-1024 - 2007
SUMMARY We compared seawater tolerance, gill Na+/K+-ATPase and Na+/K+/2Cl–
cotransporter (NKCC)abundance, and mitochondria-rich cell (MRC) morphology of
three salmonids,lake trout Salvelinus namaycush, brook trout Salvelinus
fontinalis and Atlantic salmon Salmo salar. They were transferred directly from
0 p.p.t. (parts per thousand; freshwater) to 30 p.p.t. seawater, or transferred
gradually from ...
Reciprocal expression of gill Na+/K+-ATPaseα-subunit isoforms α1a and α1b during seawater acclimation of three salmonid fishes that vary in their salinity tolerance
Journal of Experimental Biology - Tập 209 Số 10 - Trang 1848-1858 - 2006
SUMMARYThe upregulation of gill Na+/K+-ATPase activity is considered critical
for the successful acclimation of salmonid fishes to seawater. The present study
examines the mRNA expression of two recently discovered α-subunit isoforms of
Na+/K+-ATPase(α1a and α1b) in gill during the seawater acclimation of three
species of anadromous salmonids, which vary in their salinity tolerance. Levels
of thes...
Tổng số: 309
- 1
- 2
- 3
- 4
- 5
- 6
- 10