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- Author:
- Zeisler, R.
- Source:
- Fresenius' journal of analytical chemistry 1998 v.360 no.3-4 pp. 376-379
- ISSN:
- 0937-0633
- Subject:
- X-radiation, etc ; Chlorophyta; air; analytical methods; biomass; particle size; particle size distribution; particulates; quality control; scanning electron microscopy; sediments; Show all 11 Subjects
- Abstract:
- ... Many modern analytical techniques use small solid samples and lack proper reference materials for their calibration and quality assurance. A remedy to this deficiency may be in the development of a new genre of highly homogeneous natural matrix materials, their properties being studied with analytical techniques such as PIXE and μ-PIXE, solid sampling AAS, scanning electron microscopy in combinati ...
- DOI:
- 10.1007/s002160050716
-
http://dx.doi.org/10.1007/s002160050716
- Author:
- Jegou, D.; Cluzeau, D.; Wolf, H.J.; Gandon, Y.; Trehen, P.
- Source:
- Biology and fertility of soils 1998 v.26 no.2 pp. 116-121
- ISSN:
- 0178-2762
- Subject:
- X-radiation, etc ; interspecific variation; Aporrectodea caliginosa; Lumbricus terrestris; spatial distribution; computed tomography; soil heterogeneity; soil depth; earthworms; density; soil density; Show all 11 Subjects
- Abstract:
- ... Artificially packed soil columns were inoculated with individuals of different earthworm species (Lumbricus terrestris, Aporrectodea giardi or Aporrectodea caliginosa) and placed under controlled conditions in the laboratory. At the end of the incubation period, which lasted 8 months, three-dimensional reconstructions of the burrow system of each species were obtained using X-ray computed tomograp ...
- DOI:
- 10.1007/s003740050353
-
http://dx.doi.org/10.1007/s003740050353
- Author:
- Huang, C. H.; Lin, C. I.; Chen, H. K.
- Source:
- Journal of materials science 2005 v.40 no.16 pp. 4299-4306
- ISSN:
- 0022-2461
- Subject:
- X-radiation, etc ; X-ray diffraction; calcium; calcium oxide; carbon; carbon monoxide; chemical composition; gasification; models; phase transition; physical properties; scanning electron microscopy; soot; sulfur; surface area; vapors; zinc; zinc oxide; Show all 18 Subjects
- Abstract:
- ... The carbothermic reduction of zinc sulfide in the presence of calcium oxide has been studied using X-ray diffractometry (XRD), scanning electron microscopy (SEM) and surface area measurements. The results of XRD indicated that zinc sulfide was first transformed from β type to α type, then reacted to give an intermediate product of zinc oxide before being reduced finally to zinc vapor. The sulfur o ...
- DOI:
- 10.1007/s10853-005-2805-y
-
http://dx.doi.org/10.1007/s10853-005-2805-y
- Author:
- Bačić, T.; Krstin, Lj.; Roša, J.; Popović, Ž.
- Source:
- Acta botanica Hungarica 2005 v.47 no.1-2 pp. 1-8
- ISSN:
- 0236-6495
- Subject:
- X-radiation, etc ; Abies alba; age structure; aluminum; cadmium; calcium; carbon; chlorine; chromium; cobalt; copper; energy-dispersive X-ray analysis; heavy metals; iron; lead; magnesium; manganese; mercury; national parks; nitrogen; oxygen; phosphorus; potassium; scanning electron microscopes; silicon; sulfur; trees; zinc; Show all 28 Subjects
- Abstract:
- ... Concentration of carbon (C), oxygen (O), nitrogen (N), magnesium (Mg), aluminium (Al), silicon (Si), phosphorus (P), mercury (Hg), sulphur (S), lead (Pb), chlorine (Cl), potassium (K), cadmium (Cd), calcium (Ca), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), copper (Cu) and zinc (Zn), in the form of weight percentage, in the needles of different age classes, current and previous year one, ...
- DOI:
- 10.1556/ABot.47.2005.1-2.1
-
http://dx.doi.org/10.1556%2FABot.47.2005.1-2.1
- Author:
- HAJIBAGHERI, M. A.; HARVEY, D. M. R.; FLOWERS, T. J.
- Source:
- Thenew phytologist 1987 v.105 no.3 pp. 367-379
- ISSN:
- 0028-646X
- Subject:
- X-radiation, etc ; corn; leaves; plant age; salinity; salt tolerance; sodium; Show all 7 Subjects
- Abstract:
- ... Significant varietal differences were apparent in the survival of seedlings of maize in saline conditions but only at relatively high external concentrations (200 mol m⁻³ NaCl), where there was a range from 0 to 66% survival, 25 d after salinization. For the varieties examined there was a strong negative correlation between Na concentrations in the third leaf and survival. Two resistant varieties ...
- DOI:
- 10.1111/j.1469-8137.1987.tb00874.x
-
http://dx.doi.org/10.1111/j.1469-8137.1987.tb00874.x
- Author:
- Leiter, L.A.; Lukaski, H.C.; Kenny, D.J.; Barnie, A.; Camelon, K.; Ferguson, R.S.; MacLean, S.; Simkins, S.; Zinman, B.; Cleary, P.A.
- Source:
- International journal of obesity and related metabolic disorders : journal of the International Association for the Study of Obesity 1994 v.18 no.12 pp. 829
- Subject:
- X-radiation, etc ; diabetes; biomedical research; body fat; impedance; body composition; men; women; Show all 8 Subjects
- Abstract:
- ... Although weight gain often accompanies intensive treatment regimens designed to achieve near-normal glycemia in insulin-dependent diabetes mellitus (IDDM), body composition (BC) has not been well studied. Bioelectrical impedance analysis (BIA) is a safe, rapid, and non-invasive method of assessing BC but has not been utilized widely in IDDM. Data from 46 adults with IDDM were used to develop a reg ...
- Handle:
- 10113/43846
- PubMed:
- 7894522
-
- Author:
- Fendorf, S. E.; Sparks, D. L.; Lamble, G. M.; Kelley, M. J.
- Source:
- Soil Science Society of America journal 1994 v.58 no.6 pp. 1583-1595
- ISSN:
- 0361-5995
- Subject:
- X-radiation, etc ; chemical elements; chemical reactions; bioavailability; soil chemistry; chemical speciation; soil analysis; spectroscopy; adsorption; Show all 9 Subjects
- Abstract:
- ... Determining the local chemical environment of a species is often a necessity for evaluating its reactivity in the environment. However, obtaining direct molecular-level information is often problematic and may only be possible with severely invasive techniques. We discuss the physical and chemical aspects of x-ray absorption fine structure spectroscopy (XAFS) and its application in soils. This tec ...
- DOI:
- 10.2136/sssaj1994.03615995005800060001x
-
https://dx.doi.org/10.2136/sssaj1994.03615995005800060001x
- Author:
- Bucur, V.; Herbé, C.; Nosei, G.
- ISSN:
- 0928-1541
- Subject:
- X-radiation, etc ; Pinus taeda; anisotropy; densitometry; earlywood; latewood; physical properties; ultrasonics; wood; Show all 9 Subjects
- Abstract:
- ... X-ray microdensitometry and ultrasonic velocity were used to study radial variation of selected physical properties in wood of Pinus taeda. The analysed physical properties were earlywood and latewood density and stiffnesses in longitudinal and tangential anisotropic directions, calculated as the square of velocity multiplied by density. X-ray microdensitometry was used to measure earlywood and la ...
- DOI:
- 10.1163/22941932-90001351
-
http://dx.doi.org/10.1163/22941932-90001351
- Author:
- Cruz, J.A.; Salbilla, B.A.; Kanazawa, A.; Kramer, D.M.
- Source:
- Plant physiology 2001 v.127 no.3 pp. 1167-1179
- ISSN:
- 0032-0889
- Subject:
- X-radiation, etc ; nutrient transport; salinity; thylakoids; osmotic pressure; fluorescence; kinetics; electron transfer; stress response; cytochrome c; photosystem I; Chlamydomonas reinhardtii; chlorophyll; Show all 13 Subjects
- Abstract:
- ... Oxygen electrode and fluorescence studies demonstrate that linear electron transport in the freshwater alga Chlamydomonas reinhardtii can be completely abolished by abrupt hyperosmotic shock. We show that the most likely primary site of inhibition of electron transfer by hyperosmotic shock is a blockage of electron transfer between plastocyanin (PC) or cytochrome c6 and P700. The effects on this r ...
- DOI:
- 10.1104/pp.010328
- PubMed:
- 11706196
- PubMed Central:
- PMC129285
-
http://dx.doi.org/10.1104/pp.010328
- Author:
- Petrová, Pavla; Koča, Jaroslav; Imberty, Anne
- Source:
- European journal of biochemistry 2001 v.268 no.20 pp. 5365-5374
- ISSN:
- 0014-2956
- Subject:
- X-radiation, etc ; active sites; biosynthesis; catalytic activity; cations; enzymatic reactions; glycosyltransferases; magnesium; manganese; molecular dynamics; nuclear magnetic resonance spectroscopy; oligosaccharides; oxygen; Show all 13 Subjects
- Abstract:
- ... Glycosyltransferases are key enzymes involved in biosynthesis of oligosaccharides. Nucleotide‐sugars, the glycosyltransferase substrates, serve as activated donors of sugar residues during the enzymatic reaction Although very little is known about the catalytic mechanism of these enzymes, it appears that the catalytic activity in most glycosyltransferases is dependent upon the presence of a divale ...
- DOI:
- 10.1046/j.0014-2956.2001.02469.x
-
http://dx.doi.org/10.1046/j.0014-2956.2001.02469.x
- Author:
- Bronk, H.; Röhrs, S.; Bjeoumikhov, A.; Langhoff, N.; Schmalz, J.; Wedell, R.; Gorny, H.-E.; Herold, A.; Waldschläger, U.
- Source:
- Fresenius' journal of analytical chemistry 2001 v.371 no.3 pp. 307-316
- ISSN:
- 0937-0633
- Subject:
- X-radiation, etc ; X-ray fluorescence spectroscopy; archaeology; cameras; cooling; copper; detection limit; enamel; energy; glass; helium; molybdenum; optics; silicon; sodium; spectrometers; Show all 16 Subjects
- Abstract:
- ... A newly developed spectrometer for energy-dispersive micro X-ray fluorescence spectrometry has been designed for the demands of archaeometry. ArtTAX combines the advantages of non-destructive and sensitive multi-elemental analysis at sub-mm resolution with the possibility of working outside the laboratory. The spectrometer consists of an air-cooled, low-power molybdenum tube, new generation polyca ...
- DOI:
- 10.1007/s002160100989
-
http://dx.doi.org/10.1007/s002160100989
- Author:
- Lichtig, J.; Andrade, R.
- Source:
- Fresenius' journal of analytical chemistry 2001 v.371 no.4 pp. 559-561
- ISSN:
- 0937-0633
- Subject:
- X-radiation, etc ; manganese; titanium; lead; niobium; polarography; fluorescence; iron; electrodes; cobalt; quantitative analysis; copper; arsenic; molybdenum; chromium; ions; zinc; tin; pH; nickel; Show all 20 Subjects
- Abstract:
- ... A differential pulse polarographic method has been developed for the quantitative determination of niobium in pyrochlore ore. One-step polarographic curves were obtained in 0.01 mol L–¹EDTA as supporting electrolyte. Analytical curves indicated that response was linearly dependent on Nb(V) concentration between 1.6 and 8.6 mg L–¹ in the pH range 2–5. The system is quasi-reversible and controlled b ...
- DOI:
- 10.1007/s002160100933
-
http://dx.doi.org/10.1007/s002160100933
- Author:
- Jurkiewicz, A.; Turnau, K.; Mesjasz-Przybyłowicz, J.; Przybyłowicz, W.; Godzik, B.
- Source:
- Protoplasma 2001 v.218 no.3-4 pp. 117-124
- ISSN:
- 0033-183X
- Subject:
- X-radiation, etc ; Epipactis; atomic absorption spectrometry; cadmium; calcium; copper; heavy metals; iron; lead; manganese; mine tailings; mycorrhizae; mycorrhizal fungi; roots; silicon; soil; sulfur; toxic substances; zinc; Poland; Show all 20 Subjects
- Abstract:
- ... The metal distribution within mycorrhizal and nonmycorrhizal roots ofEpipactis atrorubens collected from zinc mine tailings and an area rich in heavy metal ores (both located in southern Poland) was investigated. The tailings, consisting of postflotation material, were characterised by high levels of toxic elements such as Zn, Pb, and Cd, while soil outside the tailings was also strongly enriched ...
- DOI:
- 10.1007/BF01306601
-
http://dx.doi.org/10.1007/BF01306601
- Author:
- Sadler, G.; Chappas, W.; Pierce, D.E.
- Source:
- Food additives & contaminants 2001 v.18 no.6 pp. 475-501
- ISSN:
- 0265-203X
- Subject:
- X-radiation, etc ; food processing quality; gamma radiation; electrons; ionization; food analysis; additives; food packaging; polyethylene film; food processing; food composition; polymers; food irradiation; heat treatment; food safety; Show all 15 Subjects
- Abstract:
- ... Polymers used to package food intended for irradiation must currently receive separate US FDA approvals for e-beam, gamma and X-radiation. The three forms of irradiation have virtually indistinguishable effects on polymers held in vacuum. However, in air, irradiation damage is favoured by slow dose rates, such as that characteristic of gamma irradiation. Irrespective of irradiation type, theory an ...
- DOI:
- 10.1080/02652030119263
- PubMed:
- 11407748
-
http://dx.doi.org/10.1080/02652030119263
- Author:
- Maurer, Till; Döker, Rolf; Görler, Adrian; Hengstenberg, Wolfgang; Kalbitzer, Hans R.
- Source:
- European journal of biochemistry 2001 v.268 no.3 pp. 635-644
- ISSN:
- 0014-2956
- Subject:
- X-radiation, etc ; Enterococcus faecalis; X-ray diffraction; active sites; aqueous solutions; cell membranes; crystal structure; crystallization; dephosphorylation; genes; histidine; nuclear magnetic resonance spectroscopy; phosphorylation; solvents; Show all 14 Subjects
- Abstract:
- ... The histidine‐containing phosphocarrier protein (HPr) transfers a phosphate group between components of the prokaryotic phosphoenolpyruvate‐dependent phosphotransferase system (PTS), which is finally used to phosphorylate the carbohydrate transported by the PTS through the cell membrane. Recently it has also been found to act as an intermediate in the signaling cascade that regulates transcription ...
- DOI:
- 10.1046/j.1432-1327.2001.01916.x
-
http://dx.doi.org/10.1046/j.1432-1327.2001.01916.x
- Author:
- WATANABE, Kunihiko; MIYAKE, Kazue; SUZUKI, Yuzuru
- Source:
- Bioscience, biotechnology, and biochemistry 2001 v.65 no.9 pp. 2058-2064
- ISSN:
- 1347-6947
- Subject:
- X-radiation, etc ; Aspergillus oryzae; Bacillus cereus; Saccharomyces pastorianus; X-ray diffraction; active sites; alpha-amylase; biotechnology; cleavage (chemistry); histidine; hydrolysis; mutants; site-directed mutagenesis; Show all 13 Subjects
- Abstract:
- ... Three active site residues (Asp199, Glu255, Asp329) and two substrate-binding site residues (His103, His328) of oligo-1,6-glucosidase (EC 3.2.1.10) from Bacillus cereus ATCC7064 were identified by site-directed mutagenesis. These residues were deduced from the X-ray crystallographic analysis and the comparison of the primary structure of the oligo-1,6-glucosidase with those of Saccharomyces carlsb ...
- DOI:
- 10.1271/bbb.65.2058
-
http://dx.doi.org/10.1271/bbb.65.2058
- Author:
- Sjögren, Klara; Hellberg, Nina; Bohlooly-Y, Mohammad; Savendahl, Lars; Johansson, Marie S.; Berglindh, Thomas; Boseaus, Ingvar; Ohlsson, Claes
- Source:
- Journal of nutrition 2001 v.131 no.11 pp. 2963-2966
- ISSN:
- 0022-3166
- Subject:
- X-radiation, etc ; adipose tissue; animal models; biomedical research; blood serum; body fat; dual-energy X-ray absorptiometry; females; image analysis; leptin; lipid content; males; mice; phenotype; prediction; Show all 15 Subjects
- Abstract:
- ... The introduction of transgenic mice as animal models in medical research has increased the need for methods to study the phenotype of mice. The aim of the present study was to develop and evaluate a method for in vivo prediction of fat content in living mice. We combined a modified dual-energy X-ray technique with an image analysis procedure. This combined procedure calculates the percentage of fa ...
- PubMed:
- 11694626
-
