ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Hair zinc of young children from rural and urban areas in North Rhine-Westphalia, Federal Republic of Germany (1988)

Lombeck, I. ; Wilhelm, M. ; Hafner, D. ; [et al.]

Springer

European journal of pediatrics 147 (1988), S. 179-183

add to mindlist on the mindlist

Details

ISSN: 1432-1076

Keywords: Zinc ; Hair ; North Rhine-Westphalia ; Atomic absorption spectrophotometry ; Children

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract Hair zinc levels were estimated by atomic absorption spectrophotometry in 474 children, aged 3–7 years, from 11 kindergartens in a highly industrialized and polluted area (Duisburg) and 8 kindergartens in a rural area of North Rhine-Westphalia. The mean hair zinc level amounted to 118 μg/g, increasing between the 4th and 7th year of life. At all ages the values from the urban toddlers were lower than from rural toddlers, and in both regions they were higher in winter than in summer. Children with frequent upper respiratory tract infections (〉6 infections/year) showed significantly lower zinc hair values, independent of their age. Low hair zinc values (below 70 μg/g) were frequently found, raising the question as to whether this is a normal, age-related phenomenon, or whether it indicates a suboptimal zinc status of young children from North Rhine-Westphalia.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00442218

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Purification and Characterization of two Extracellular β-Glucosidases from Trichoderma viride ITCC 1433 (1986)

Wilhelm, M. ; Sahm, H.

Berlin : Wiley-Blackwell

Acta Biotechnologica 6 (1986), S. 115-121

add to mindlist on the mindlist

Details

ISSN: 0138-4988

Keywords: Life Sciences ; Life Sciences (general)

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Process Engineering, Biotechnology, Nutrition Technology

Notes: T. viride ITCC 1433 synthesizes a two component system for the hydrolysis of cellobiose and cellooligodextrins. 80% of the total activity are solubilized during growth. The large protein (A), mol. weight 98 000 d, is glycosylated and slightly acidic (pH = 6.1). The smaller protein (B), mol. weight 70 000 d, is unglycosylated and neutral (pH = 7.2). Both proteins form a two-step system where β-glucosidase A is active at low substrate concentrations (KM = 2.3 × 10-4 M cellobiose) while β-glucosidase B covers the range of 10-fold higher cellobiose concentrations (KM = 1.8 × 10-3 M). The enzymes are fairly stable with a residual activity of 70% at 50°C after 24 h.

Additional Material: 4 Ill.