Dietary calcium utilization among a group of spanish boys aged 11–14 years on their usual diets

2006 ◽  
Vol 62 (1) ◽  
pp. 9-16 ◽  
Author(s):  
I. Seiquer ◽  
M. López-Frías ◽  
A. Muñoz-Hoyos ◽  
G. Galdó ◽  
C. Delgado-Andrade ◽  
...  
Keyword(s):  
Dietary Calcium ◽  
Calcium Utilization

scholarly journals Eggshell quality and calcium utilization in feed of hens in repeated laying cycles

2010 ◽  
Vol 55 (No. 2) ◽  
pp. 66-74 ◽  
Author(s):  
H. Arpášová ◽  
M. Halaj ◽  
P. Halaj
Keyword(s):  
Shell Thickness ◽  
Dietary Calcium ◽  
Shell Formation ◽  
Shell Deformation ◽  
Eggshell Quality ◽  
Opposite Trend ◽  
Number Of Cycles ◽  
Advanced Cycles ◽  
Calcium Utilization

Hens of the laying hybrid Shaver Starcross 288 were used in two consequential experiments. The first experiment (for 10 months) was conducted on hens at the age from 18 to 60 weeks (1<sup>st</sup> cycle; <i>n</i> = 50) and moulted hens after 10 months laying from 70 to 110 weeks of age (2<sup>nd</sup> cycle; <i>n</i> = 50). For the second experiment (for 8 months) in the 1<sup>st</sup> cycle 18 weeks old hens were bought (<i>n</i> = 60) and hens from the first experiment after moulting were used in the 2<sup>nd</sup> and 3<sup>rd</sup> cycle (<i>n</i> = 32 and <i>n</i> = 28). During the experiments eggshell qualitative parameters and calcium utilisation (%) were determined. The results indicate that the percentage of eggshell decreased with the increasing number of cycles. The significant correlation of the eggshell proportion and the age of hens was higher in long, advanced cycles (<i>P</i> < 0.05). The shell strength in both experiments decreased slightly in relation to the age of hens and repeated laying cycles. The shell deformation had an opposite trend to the shell strength, i.e. it increased with the increasing laying. The average shell thickness showed a decrease in the repeated laying cycles, more significant in shorter cycles (<i>P</i> < 0.01). The specific shell gravity maintained balanced values both in cycles and by the age of hens. The shell density in all cycles in both experiments showed a decreasing tendency in relation to the age of hens. In dietary calcium utilization for the shell formation a significant decrease was recorded in the second cycles after moulting (<i>P</i> < 0.05).

scholarly journals Effects of various levels of dietary calcium during pregnancy on maternal calcium utilization and fetal growth in rats.

1984 ◽  
Vol 30 (3) ◽  
pp. 285-295 ◽  
Author(s):  
Ai-Chi LAI ◽  
Marina Kiyomi ITO ◽  
Keiko KOMATSU ◽  
Yoshiaki NIIYAMA
Keyword(s):  
Fetal Growth ◽  
Dietary Calcium ◽  
Calcium Utilization

scholarly journals Influence of Time of Calcium Intake on Bone and Dietary Calcium Utilization

1986 ◽  
Vol 65 (3) ◽  
pp. 555-558 ◽  
Author(s):  
M. FARMER ◽  
D.A. ROLAND ◽  
A.J. CLARK
Keyword(s):  
Calcium Intake ◽  
Dietary Calcium ◽  
Calcium Utilization

scholarly journals Influence of Dietary Calcium on Bone Calcium Utilization

1986 ◽  
Vol 65 (2) ◽  
pp. 337-344 ◽  
Author(s):  
M. FARMER ◽  
D.A. ROLAND ◽  
A.J. CLARK
Keyword(s):  
Dietary Calcium ◽  
Bone Calcium ◽  
Calcium Utilization

Higher Dietary Acidity is Associated with Lower Bone Mineral Density in Postmenopausal Iranian Women, Independent of Dietary Calcium Intake

2014 ◽  
Vol 84 (3-4) ◽  
pp. 0206-0217 ◽  
Author(s):  
Seyedeh-Elaheh Shariati-Bafghi ◽  
Elaheh Nosrat-Mirshekarlou ◽  
Mohsen Karamati ◽  
Bahram Rashidkhani
Keyword(s):  
Calcium Intake ◽  
Dietary Calcium ◽  
Dietary Calcium Intake ◽  
Dietary Intakes ◽  
Iranian Women ◽  
Acid Base Balance ◽  
Mineral Density ◽  
Acid Base ◽  
Base Balance ◽  
Dietary Acid

Findings of studies on the link between dietary acid-base balance and bone mass are relatively mixed. We examined the association between dietary acid-base balance and bone mineral density (BMD) in a sample of Iranian women, hypothesizing that a higher dietary acidity would be inversely associated with BMD, even when dietary calcium intake is adequate. In this cross-sectional study, lumbar spine and femoral neck BMDs of 151 postmenopausal women aged 50 - 85 years were measured using dual-energy x-ray absorptiometry. Dietary intakes were assessed using a validated food frequency questionnaire. Renal net acid excretion (RNAE), an estimate of acid-base balance, was then calculated indirectly from the diet using the formulae of Remer (based on dietary intakes of protein, phosphorus, potassium, and magnesium; RNAERemer) and Frassetto (based on dietary intakes of protein and potassium; RNAEFrassetto), and was energy adjusted by the residual method. After adjusting for potential confounders, multivariable adjusted means of the lumbar spine BMD of women in the highest tertiles of RNAERemer and RNAEFrassetto were significantly lower than those in the lowest tertiles (for RNAERemer: mean difference -0.084 g/cm2; P=0.007 and for RNAEFrassetto: mean difference - 0.088 g/cm2; P=0.004). Similar results were observed in a subgroup analysis of subjects with dietary calcium intake of >800 mg/day. In conclusion, a higher RNAE (i. e. more dietary acidity), which is associated with greater intake of acid-generating foods and lower intake of alkali-generating foods, may be involved in deteriorating the bone health of postmenopausal Iranian women, even in the context of adequate dietary calcium intake.

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