ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Electronic Resource

Survival of micro-organisms in space (1968)

Lorenz, Peter R. ; Hotchin, John ; Markusen, Aletha S. ; [et al.]

Springer

Origins of life and evolution of the biospheres 1 (1968), S. 118-130

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ISSN: 1573-0875

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Geosciences

Notes: Abstract Dried suspensions ofPenicillium roqueforti Thom, Coliphage T-1,Bacillus subtilis and tobacco mosaic virus were exposed to space on board the Gemini-IX-A and XII earth satellites and the Agena-VIII space rocket. All micro-organisms tested survived the direct exposure during the Gemini-IX-A experiment. In the Gemini-XII experiment only the T-1 phage survived the direct exposure. The survival was influenced by the suspending medium and depended on the species of the microorganism. After four months of space flight on the Agena-VIII space rocket surviving fractions between 2×10−3 and 1.0 were found in the unopened flight container. However, micro-organisms exposed on the cover of the container during this period were completely inactivated. Shielding against solar ultraviolet radiation during flight resulted in survival of micro-organisms exceeding to that of the transport controls, and the survival was considered complete. Sterile methylcellulose collection surfaces were exposed to space on board the Gemini-IX-A and XII satellites in an attempt to collect viable micro-organisms in space. None of the collection surfaces yielded viable micro-organisms.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00924234

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2

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Pharmacological effects and serum levels of orally administered alprenolol in man (1972)

Åblad, B. ; Ervik, M. ; Hallgren, J. ; [et al.]

Springer

European journal of clinical pharmacology 5 (1972), S. 44-52

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ISSN: 1432-1041

Keywords: alprenolol ; serum drug level ; exercise ; man ; pharmacokinetics

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology , Medicine

Notes: Summary The effects of alprenolol on heart rate and systolic blood pressure were studied in healthy subjects during standardized exercise on a bicycle ergometer. In one series of experiments, in which serum concentrations of alprenolol were also measured, the effects of single oral doses of 50, 100 and 200 mg of alprenolol and a placebo were compared by a double blind cross-over technique. In a second series of experiments 100 mg alprenolol was given four times in one day and the effect was followed for up to eighteen hours after the last dose. — Alprenolol diminished the expected increase in heart rate and systolic blood pressure during exercise. The reduction of exercise tachycardia in a given individual was linearly related to the logarithm of the dose or the serum concentration of alprenolol. The serum concentrations required for a given reduction of exercise tachycardia varied almost one hundred-fold amongst the subjects studied. The biological availability of alprenolol was dose-dependent, probably due to a limited capacity biotransformation of the drug before it entered the general circulation. After a single dose the serum level of alprenolol and its chronotropic effect diminished at a rate corresponding to an elimination half life of about two hours. This rate of elimination was consistent with that calculated from the results of the four dose study.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00560895

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3

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Surface characterization and biological evaluation of spark-eroded surfaces (1997)

WENNERBERG, A ; HALLGREN, C ; JOHANSSON, C ; [et al.]

Springer

Journal of materials science 8 (1997), S. 757-763

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ISSN: 1573-4838

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine , Technology

Notes: Abstract Forty commercially pure titanium implants were prepared with a spark-eroding process in order to create highly increased surface roughnesses. Two degrees of roughness were achieved by altering the applied current. Surface topographical characterization was performed with SEM and an optical profilometer. The surface composition and oxide layer were investigated using Auger scanning microscopy. In the present study, there was a large difference between the stipulated and measured surface roughness, indicating the need for a careful surface characterization in each new study. After 12 wk in rabbit bone, no statistically significant difference was found with respect to peak removal torque and histomorphometric analyses. The results from the present study provide no support for further increase of the surface roughness than that possible to achieve with a blasting technique.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1018560528625

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4

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Deposition of acidifying compounds in Sweden (1995)

Hallgren Larsson, E. ; Knulst, J. ; Malm, G. ; [et al.]

Springer

Water, air & soil pollution 85 (1995), S. 2271-2276

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ISSN: 1573-2932

Source: Springer Online Journal Archives 1860-2000

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: Abstract The Swedish Environmental Research Institute (IVL) has monitored deposition of acidifying compounds in Sweden. The monitoring programmes were initiated by various air quality protection associations, and regional forest and environmental authorities. The purpose is to quantify sulphur (S) and nitrogen (N) deposition to forests, and to illustrate possible acidification of the soil. Actual deposition of S and N is compared with critical loads. Deposition is investigated by precipitation studies in open field areas and by throughfall studies in forest stands. Soilwater chemistry is examined in the forest stands and used as indication of soil conditions. For most of the study sites, data on needle loss, forest growth, and soil chemistry are available from the National Board of Forestry. All available data are combined in a computer database for evaluation. Evaluation of data during 1985–94 shows that regional deposition monitoring illustrates the size and distributional pattern of S and seasalts. Monitoring data can identify certain regions receiving heavy loads of N, which can be found mainly in southern Sweden. Soilwater analyses indicates that large areas in Sweden have heavily acidified forest soils, low pH-values, low levels of calcium (Ca2+), magnesium (Mg2+), and potassium (K+), and raised levels of inorganic aluminium (iAl). Forest sites in the coastal regions of southern and south-western Sweden also showed raised inorganic N levels in soilwater. The relationship between deposition load and effects on soil chemistry is recognised by a correlation between S deposition and iAl levels in soilwater. Another correlation was found between N deposition (throughfall) and N levels in soilwater.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01186172

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5

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Root hydraulic properties of spruce measured with the pressure probe (1994)

Hallgren, S. W. ; Rüdinger, M. ; Steudle, E.

Springer

Plant and soil 167 (1994), S. 91-98

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ISSN: 1573-5036

Keywords: composite transport model ; hydraulic conductivity ; reflection coefficient

Source: Springer Online Journal Archives 1860-2000

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract The root pressure probe was used for the first time to measure the hydraulic properties of entire root systems of youngPicea abies. Hydraulic conductance was measured by osmotic and hydrostatic pressure relaxation techniques. Osmotic experiments were conducted by changing the nutrient solution and hydrostatic experiments by causing flow across the root with the pressure probe and with external pressure applied to the root system or to the cut stem of the excised root system. Usually,Picea abies root systems did not develop appreciable root pressure (〈 0.02 MPA) and could be induced to reach a root pressure of 0.07 MPa by treating with KNO3. In general, hydraulic conductance of the root system was large, but it was much smaller in the osmotic than in the hydrostatic experiments. Both hydrostatic techniques gave similar results. The results were explainable by a composite transport model of the root.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01587603

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6

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Research versus operational correlations between seedling survival and root growth potential of shortleaf pine (1997)

South, David B. ; Hallgren, Stephen W.

Springer

New forests 13 (1997), S. 357-365

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ISSN: 1573-5095

Keywords: family ; lifting date ; nursery ; planting date ; root growth capacity ; seed source ; seedling quality ; storage

Source: Springer Online Journal Archives 1860-2000

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract Relationships between root growth potential (RGP) and plantation survival were evaluated for 12 families of shortleaf pine (Pinus echinata Mill.) from Oklahoma and Arkansas in 2 consecutive years. Bare-root, 1+0 seedlings were either planted one day after lifting (nonstored) or were stored at 1° to 3°C for 4 weeks. Correlations were obtained using the traditional “research” method where seedlings are planted in the field prior to obtaining results from the RGP test. In addition, “operational” correlations were derived by planting seedlings after obtaining RGP test data. For nonstored seedlings, research correlations were generally higher (r values were larger in 18 of 24 cases) than operational correlations. The predictive ability of operational correlations may not be high enough with 28-day pot tests to warrant batch culling of freshly lifted shortleaf pine. However, results were mixed for stored seedlings. In one year, operational correlations were generally higher than research correlations.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1006511014138

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7

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Production of π0 andη 0 at 11° inpp Collisions at $$\sqrt s = 63 GeV$$ (1983)

Akesson, T. ; Albrow, M. G. ; Almehed, S. ; [et al.]

Springer

The European physical journal 18 (1983), S. 5-11

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ISSN: 1434-6052

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The inclusive π0 production cross-section and the η/π0 ratio have been measured inpp collisions at $$\sqrt s = 63 GeV$$ at the CERN Intersecting Storage Rings in the rapidity range 2.00〈y〈2.75. The π0 cross-section exhibits a strongy-dependence and falls more steeply as a function ofp T, compared with the cross-section measured aty∼0. We find a value of 0.46±0.07 for the η/π0 ratio with no significantp T dependence over the range 2.0〈p T〈4.0 GeV/c.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01571698

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8

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The nutritive value of amaranth grain (Amaranthus caudatus) (1987)

Pedersen, Birthe ; Hallgren, L. ; Hansen, Inge ; [et al.]

Springer

Plant foods for human nutrition 36 (1987), S. 325-334

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ISSN: 1573-9104

Keywords: amaranth grain ; protein and energy utilization ; protein complementation ; maize ; wheat ; sorghum

Source: Springer Online Journal Archives 1860-2000

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract The purpose of this investigation was to study the nutritional value of grain amaranth (Amaranthus caudatus) as a supplement to cereals, and to determine the effect of heat on nutritional quality of cereal/amaranth mixtures. Maize, wheat and low-tannin sorghum blends containing 0%, 10%, 25% and 50% of popped amaranth flour were studied in balance experiments with growing rats. The popped amaranth was very high in lysine (5.19 g/16g N), but lysine was still the first limiting amino acid in the blends. However, amino acid scores were raised significantly by amaranth substitution, and the tryptophan deficiency of maize protein was alleviated by addition of amaranth. True protein digestibility was, in general, not affected by amaranth substitution, but the biological value increased considerably with increasing levels of inclusion. Amaranth substitution also resulted in remarkable increases in weight gain of the rats. The energy digestibility of the different blends was quite similar and there was only little variation in the amount of digestible energy of the mixtures. Cooking produced a very small but significant reduction in protein and energy digestibility. However, the effects of cooking were minor and probably without practical importance. In conclusion, addition of amaranth to cereal flours improved protein quality without affecting energy utilization. Amaranth seems to be an effective source of protein to combine with cereal proteins.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01892353

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9

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Spatial and Temporal Patterns of Chloride Deposition in Southern Sweden (2000)

Gustafsson, Mats E. R. ; Hallgren Larsson, Eva

Springer

Water, air & soil pollution 124 (2000), S. 345-369

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ISSN: 1573-2932

Keywords: chloride ; climate ; deposition ; geostatistics ; kriging ; pattern ; Sweden

Source: Springer Online Journal Archives 1860-2000

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: Abstract Monthly bulk deposition of chloride at 49 stations in Southern Sweden between 1989 and 1995 was used to produce quarterly and annual deposition maps through ordinary block kriging. Generally, deposition decreases from the west coast and eastward and displays a large annual variation, governed by the frequency and intensity of midlatitude cyclones. The 1st quarter dominates the temporal pattern all years except 1992. The 4th quarter is the second most important and the 2nd and 3rd quarters have generallylow deposition. The spatial deposition maximum was often displaced from the west coast to the western fringe of the South Swedish highland, due to orographic enhancement of precipitation. On the western rise of the highland, deposition almost entirely co-variates with precipitation. On the west coast and in the eastern part of Southern Sweden, thetemporal pattern is a more complex result of precipitation and frequency of strong westerlies. Comparing the quarterly total dataset with precipitation and frequency of westerly gales shows that both the 3rd and 4th quarters have higher mean precipitation than the 1st quarter, but lower deposition, while the second quarter has substantially lower precipitation but almost equal deposition to the 3rd quarter. The frequency of westerly gales shows a clearer, linear relationship to quarterly deposition. The 1st quarter has the highest variability in deposition and precipitation as well as in frequency of westerly gales. The importance of single highlysalt laden cyclones to the annual deposition is obvious in the 1st quarter of 1993. Changes in cyclone activity due to climate change is therefore of vital importance for the chemical characteristics of the midlatitude atmosphere.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1005261417707

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