Manipulating the diet to reduce environmental pollution from pigs

2003 ◽  
Vol 2003 ◽  
pp. 221-221
Author(s):  
A.J.A. Aarnink ◽  
G.C.M. Bakker ◽  
M.C.J. Smits ◽  
M.W.A. Verstegen

In the Netherlands ammonia emission should be reduced considerably to prevent detrimental effects on the environment. Ammonia is mainly formed by enzymatic conversion of urea and other N-compounds in urine. In traditional fattening pig houses approximately 13% of the N taken in by the feed is emitted as ammonia. Different nutritional factors are influencing ammonia emission. Of these the protein content, the acid-base balance and the carbohydrate composition are the most important. In different experiments the sole effects of these factors on ammonia emission have been investigated. The objective of this study was to determine whether the effects of these factors are additive.

2014 ◽  
Vol 84 (3-4) ◽  
pp. 0206-0217 ◽  
Author(s):  
Seyedeh-Elaheh Shariati-Bafghi ◽  
Elaheh Nosrat-Mirshekarlou ◽  
Mohsen Karamati ◽  
Bahram Rashidkhani

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.


2016 ◽  
Vol 24 (3) ◽  
pp. 116-121
Author(s):  
김지용 ◽  
남상욱 ◽  
김영미 ◽  
이윤진 ◽  
이훈상 ◽  
...  

1932 ◽  
Vol 98 (1) ◽  
pp. 253-260 ◽  
Author(s):  
Victor C. Myers ◽  
Edward Muntwyler ◽  
Arthur H. Bill

1935 ◽  
Vol 112 (1) ◽  
pp. 239-262
Author(s):  
Nathan W. Shock ◽  
A. Baird Hastings

1965 ◽  
Vol 12 (5) ◽  
pp. 479-496 ◽  
Author(s):  
J. B. POSNER ◽  
A. G. SWANSON ◽  
F. PLUM

Sign in / Sign up

Export Citation Format

Share Document