ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Porous silicon formation mechanisms (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 1 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Recent reports describing photoluminescence in porous silicon have heightened the level of interest in it as a unique electronic material, and have created a need for a more complete understanding of the mechanism of porous silicon formation. The various models describing porous silicon formation are reviewed and the known electrochemical and morphological properties are discussed with the intention of unifying the different models into a comprehensive explanation for the formation of a porous structure in silicon. Because the specific surface dissolution chemistry is critical for a complete understanding of pore formation, some of the more prominent dissolution reactions are also reviewed and their relative importance to pore generation and morphology is discussed. Some aspects of the recently reported quantum effects are also reviewed. Because the mechanism of porous silicon formation involves a wide range of interdisciplinary fields, a considerable number of analogies and examples to related phenomena are also presented throughout the review to aid comprehension.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350839
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    3-Hydroxy-3-methylglutaryl-coenzyme A reductase inhibitors. 8. Side chain ether analogs of lovastatin (1991)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 34 (1991), S. 2474-2477 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00112a024
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Daily ration estimates for yellowfin sole, Limanda aspera (Pallas), based on laboratory consumption and growth (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 38 (1991), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Several estimates of minimal energy requirements for yellowfin sole were made. Energy expenditures of 1.6, 4.1 and 8.3 cal g−1 day−1 were obtained from starvation weight loss, standard metabolism and maintenance ration procedures, respectively, at 6° C. The temperature effect on energy requirement was reflected in the Q10 values for starvation weight loss (2.0), standard metabolism (6.3) and maintenance ration (6.5).Both energy intake and weight of food were linearly related to, and good predictors of, laboratory growth. These relationships were used to estimate the food and energy intake necessary for yellowfin sole to achieve a year's growth in the natural environment. Based on a caloric value of 2.0 kcal g−1 of food (herring fillets), yellowfin would require 0.35 to 0.39% body weight day−1 at 3° C to achieve the mean growth rate exhibited in the Bering Sea. To achieve Gulf of Alaska growth rates at 5 to 6° C, yellowfin would require 0.63% body weight day−1. Based on a caloric value of 0.57 kcal g−1 of food (chopped octopus), yellowfin would require 0.83% body weight per day to achieve the Gulf of Alaska growth rate (6° C). These requirements based on the calorific value of herring fillets, which are three to five times higher than previous estimates of daily ration in this species, are probably conservative estimates since many of their prey species have a lower energy content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1991.tb03110.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Energy and ration requirements of juvenile Pacific halibut (Hippoglossus stenolepis) based on energy consumption and growth rates (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 44 (1994), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Growth of captive juvenile Pacific halibut was linearly related to energy consumption (J g−1 day−1) at 4°C by the following equation: growth (% body weight (b.w.) day−1)=0–007 (consumption J g−1 day−1)– 0.192; r2=0.81. Weight gain was independent of size for fish between 9 and 7000 g when growth was expressed as a function of consumption in J g−1 day−1. Maintenance ration determined in feeding–growth experiments averaged 27.4 J g−1 day−1 at 4–0°C. Small halibut ate significantly more food than large fish. Single meals following 2 day fasts averaged 4.1% b.w. for halibut under 100 g, 1.72% b.w. for 1.2 kg fish and 1.1% B.W. for 6.8 kg fish. Both large and small size categories of halibut tended to evacuate their meal in about 3 days even though small fish ate relatively larger meals. Minimum estimates for daily ration to achieve growth rates observed in the Gulf of Alaska were approximately 0.5 to 2.4% b.w. day−1 depending on fish size and whether northern shrimp or yellowfin sole were their prey.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1994.tb01273.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    The seasonal changes in somatic energy content of Gulf of Alaska yellowfin sole, Pleuronectes asper (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 43 (1993), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Seasonal measurement of body energy content was made for Pleuronectes asper (Pallas, 1814) from the Gulf of Alaska. Whole body energy content of complete fish (∼ 3472 J g−1 wet wt) was minimal in May for females as their overwintering phase ended, then increased to ∼ 4456 J g−1 prior to spawning. The ovarian index [(g.w./t.w.) × 100] and energy content of ovaries (J g−1) was highest in June and May respectively, and then declined markedly by August as spawning occurred.Throughout the year male whole body energy content of complete fish ranged from 3351 to 4590 J g−1 with the lowest values in May and highest values occurring during June to September, the feeding season. The testes index [(g.w./t.w.) × 100] and total energy content of testes (J g−1) were high in March and lowest during June and July. On a weight-specific basis, males and females had similar whole body energy values throughout the year.Juveniles followed the same seasonal trends in energy storage as adults and had similar whole body energy values. Whole body energy content was linearly related to wet and dry weight condition factor with r2 values of 0.70 and 0.87, respectively. Dry body weight as percent of wet body weight was the best predictor of body energy (r2=0.91).Yellowfin sole had an annual energy cycle with energy accumulation and growth from May to September. Thereafter they utilized stored energy for metabolic and reproductive needs. Spawning began in late May or early June and fish were spent by August. Whole body energy content increased by 28, 33 and 35% between May and June, for females, juveniles, and males, respectively, the most dramatic change during the year long survey. This suggests that intense feeding in May must be an important aspect of their energy storage cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1993.tb00416.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Food intake and growth in the blue-spotted trevally, Caranx bucculentus Alleyne and Macleay 1877, with reference to predation on penaeid prawns (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 40 (1992), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Blue-spotted trevally, Caranx bucculentus, were fed different rations of pilchard and prawn in order to investigate feeding and growth relationships. Maintenance rations at 25.5° C amounted to 3.7% B.W. day−1 and 2.7% B.W. day−1 for prawns and pilchards, respectively. Additional feeding experiments at 28.9° C yielded a maintenance ration of prawns of 3.8% B.W. day−1, suggesting there is very little if any temperature effect on the feeding-growth relationship over the range studied. Fish fed twice or more each day consumed about 7.3 ± 1.4% B.W. day−1.Given the biomass of this trevally in Albatross Bay, Gulf of Carpentaria, and the contribution of prawns to its diet, we estimate consumption of commercial prawns at 25 ± 5 g.ha−1 day−1 or 11 g kg−1 day−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1992.tb02578.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Food intake and growth in the Moses perch, Lutjanus russelli (Bleeker), with reference to predation on penaeid prawns (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 38 (1991), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Juvenile Moses perch were fed various rations of penaeid prawn and pilchard foods at 26.4 and 28.7° C to elucidate feeding–growth relationships. Maintenance rations amounted to 5.0 and 3.8% of body weight per day (BW day–1) on prawn and pilchard diets, respectively, at 26.4° C and 4.5% BW day 1 for prawn at 28.7° C. This apparent reduction in maintenance ration at higher temperature is probably due to reduction in activity levels. Starvation weight loss, an indicator of resting metabolic rate, increased with temperature and exhibited a Q10 of 2.0 to 2.4.Fish fed ad libitum once or twice per day at 26.4° C grew at 1.1 % BW day–1 and ingested about 9% of their BW day–1. At 28.7° C fish ingested about 8% of their BW day–1 and grew 1 .0% BW day–1. These growth rates are comparable to those of similar sized lutjanids in the wild. Since prawns comprise 64% of the diet of Moses perch in northern Australia, this level of consumption would require about 6% BW day–1 of prawns. The relevance of these findings to the assessment of predator impact on prawns in Australian estuaries is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1991.tb03629.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Consumption, growth and evacuation in the Pacific cod, Gadus macrocephalus (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 37 (1990), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Growth of Pacific cod was related to energy consumption (cal g−1 day−1) and was well described by linear equations. Maintenance ration was 11 and 12 cal g−1 day−1 at 4.5 and 6.5° C, respectively. Cod between 200 and 5000 g had similar growth rates when growth was expressed as a function of consumption (cal g−1 day−1). Laboratory consumption of food averaged 0.9 and 1.3% body weight per day at 4.5 and 6.5° C, respectively. At these temperatures growth was 0.34–0.38% body weight day−1.Maximum stomach volumes equated to approximately 4.7% of body weight with shrimp as prey. At this meal size Pacific cod did not feed the next day. A multiple meal evacuation experiment was used to verify the consumption estimates. A return-to-hunger estimate of the meal size evacuated was 1.5% body weight day−1 at 6.5° C, similar to the 1.3% consumption estimate. For Pacific cod fed a single meal of 1% body weight the estimated instantaneous evacuation rate was 0.63 body weight day−1 at 6.5° C. Meal size markedly affected the evacuation rate.Measured consumption and growth rates are similar to those of Atlantic cod, Gadus morhua.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1990.tb05933.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Seasonal changes in energy and the energy cost of spawning in Gulf of Alaska Pacific cod (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 36 (1990), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In the Gulf of Alaska, adult Pacific cod exhibited an annual cycle of condition, gonad index and liver index in which maximum values occurred in ripe fish in March and minima in July. About 30–31 % of prespawning stored energy was expended during the spawning effort. The energy associated with spawning derived from liver (24% and 18%), somatic tissue (22% and 33%) and gonad (53% and 48%) for females and males, respectively. Liver index and gonad index at the time of sampling were directly related in females, but in males gonad index was best related to liver index 1–3 months earlier.The Pacific cod is very similar to the Atlantic cod in terms of energy cycling, maximum gonad sizes, energy expended during spawning and gonadal contribution to energy expenditure. However, in Pacific cod, somatic tissue contributes markedly to energy expended during reproduction. The Pacific cod cod differs from the walleye pollock with respect to gonad index (13% and 20%ν. 20% and 8% for females and males, respectively), spawning weight loss (25%ν. 38%), liver energy loss during spawning (71%ν. 55%) and energy cost of spawning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1990.tb05611.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Mitochondrial DNA variation in long-term tissue cultured rice lines (1990)
    Springer
    Theoretical and applied genetics 80 (1990), S. 81-87 
    Details
    ISSN: 1432-2242
    Keywords: Rice (Oryza sativa) ; Mitochondrial DNA ; S-(2-amino)-ethyl-L-cysteine ; Tissue culture ; Restriction and hybridization patterns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effects of long-term tissue culture on mitochondrial DNAs were examined using rice (Oryza sativa) cell suspension cultures. Mitochondrial DNAs were isolated from P. I. 353705 (an indica subspecies of rice similar to ‘Asam 5’), its anther-culture-derived line BL2 (an 8-year-old cell suspension culture), and five other cell lines (A1, A7, A11, A13, and A23), also derived from BL2 and independently selected for resistance to the lysine analog, S-(2-amino)-ethyl-L-cysteine. Mitochondrial DNAs of the rice lines were digested with ten restriction endonucleases (BamHI, BglII, EcoRI, EcoRV, HindIII, PstI, PvuII, SalI, SmaI, and XhoI), electrophoresed, and transferred to nylon membranes. Southern blots were hybridized with one rice and five maize probes containing mitochondrial genes. The restriction patterns of ten Southern blots and hybridization patterns of 60 endonuclease/probe combinations were analyzed. DNAs from all sources produced unique restriction patterns when digested with HindIII or BglII; with the other endonucleases an array of similarities and differences was observed. Lines BL2 and A11 showed unique patterns with all restriction endonucleases tested. No hybridization pattern differences were observed among the lines when probes containing apt9 and atpA were used. However, extensive hybridization pattern differences were observed with coxI, coxII, rrn18-rrn5, and atp6 probes. Both restriction and hybridization patterns revealed variation due to tissue culture effect. Coxll was most efficient in revealing the uniqueness of BL2. Among the analog selected lines A11 was most divergent, and probes rrn18-rrn5 and atp6 were most efficient in revealing its distinctiveness. Unique mitochondrial genomic organizations were found to be associated with long-term tissue culture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224019
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...