• Title, Summary, Keyword: calcium absorption

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Effects of sn-2 palmitic acid-fortified vegetable oil and fructooligosaccharide on calcium metabolism in growing rats fed casein based diet

  • Lee, Yeon-Sook;Kang, Eun-Young;Park, Mi-Na;Choi, You-Young;Jeon, Jeong-Wook;Yun, Sung-Seob
    • Nutrition Research and Practice
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    • v.2 no.1
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    • pp.3-7
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    • 2008
  • This study was carried out to investigate the efficacy of sn-2 palmitic acid-fortified vegetable oil (Sn2PA) on calcium absorption and to confirm the synergistic effects of fructooligosaccharide on calcium absorption. Male SD rats were fed 6 kinds of casein based diets containing vegetable oil (control), sn-2 palmitic acid-fortified vegetable oil (Sn2PA) and Sn2PA with fructooligosaccharide(Sn2PAFO) in two levels of calcium (normal 0.5% and high 1.0%) for 3 weeks. Total lipids, cholesterol, triglyceride and calcium in blood were measured. Feces were collected using cages for 4 days. Serum concentrations of total lipids and calcium were not significantly different among groups. However, serum triglyceride was significantly decreased by fructooligosaccharide supplementation regardless of dietary calcium level. The lipid absorption was not significantly different among experimental groups. Calcium absorption was significantly higher in Sn2PAFO group than other groups. Calcium solubility of intestine was increased by sn-2 palmitic acid supplementation. These results suggest that sn-2 palmitic acid and fructooligosaccharide supplementation could be beneficial for baby foods including infant formula, with regard to increasing absorption of calcium by more soluble calcium in the small intestinal content.

Functional Properties of Calcium Powder of Cuttle Bone Treated with Acetic Acid (아세트산 처리 갑오징어갑 칼슘제의 기능적 특성)

  • KIM Jin-Soo;CHO Moon-Lae;HEU Min-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.36 no.2
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    • pp.74-79
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    • 2003
  • The functional properties such as a firming maintenance capacity for fermented vegetables, protein coagulation capacity antibacterial activity, calcium and peroxide absorption capacity of calcium powder of cuttle bone treated with acetic acid (ATC) were examined. In the Korean pickled cucumbers (20 days), the calcium content of ethanol insoluble solids was 5,264.9 mg/100 g and this value was higher than that of control (2,036.4 mg/100 g). Protein coagulation capacity of ATC was $0.9\%$ and its calcium absorption capacity was $49.3\%.$ The peroxide absorption capacity of ATC was shown $0-1.1\%$ range. Antibacterial activity was detected above $0.2\%.$ The ATC was effective in a firming maintenance of fermented vegetables (cucumber), coagulation capacities for soybean milk and antibacterial activity. The ATC was not effective in clarifying wastewater. Peroxide absorption capacity toward linoleic acid could not be checked by ATC, but its calcium absorption ratio was high compared to that of commercial calcium powder.

Study on the Apparent Absorption Rate of Calcium in College Women (여대생의 칼슘흡수율에 관한 연구)

  • Lee, Hyun-Ok
    • Journal of Nutrition and Health
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    • v.13 no.3
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    • pp.134-138
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    • 1980
  • The present study was designed to investigate the effects of the level of calcium intake on it's apparent absorption rate in college women. Six college girls aged 19 to 20 were fed general dormitary meals containing approximately500mg of calcium for one week and thereafter, the experimental diets containing about 800mg of calcium were given for one week. Average values for calcium intake, fecal excretion of calcium, and apparent absorption rateof calcium in both periods were determined and these values for two periods were compared by using t-test. 1) Average intakes of calcium, protein, and fat of the subjects during the period of experimental diet were significantly higher than those of general diet period. 2) Higher consumption of three food groups; meat, poultry, and fishes, fruits and vegetables, and fats and oils were noted during experimental period. However, there was no significant difference in the consumption of cereals and milk groups during these two periods. 3) The apparent absorption rate of calcium during the experimental period was higher (64%) than the one for general diet period (56%). It was noteworthy that average calcium intakes was higher during the experimental diet period (785mg) than 536mg for general diet period while the fecal excretions of calcium in both periods were not significantly different.

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The Effect of Water-Soluble Calcium Supplements on Calcium Metabolism and Bone Metabolism of Growing Rats

  • Jang, Se-Young;Jeong, Yong-Jin;Kwon, Teak-Kyu;Seo, Ji-Hyung;Park, Eun-Mi
    • Preventive Nutrition and Food Science
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    • v.12 no.4
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    • pp.217-221
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    • 2007
  • Within the elderly population, the use of calcium supplements and the intake of calcium from food are on the rise in order to maintain health. Calcium is absorbed as an ion in vivo, leading to speculation that absorption efficiency is affected by the solubility of the calcium consumed. In our study, the bioavailability of two types of calcium supplements with different solubilities was evaluated. Experimental animals were fed water-soluble or insoluble calcium supplements for 6 weeks. We found that blood alkali phosphatase activity, osteocalcin content, and urine crosslinks values were not different between the groups. Similarly, the degree of apparent calcium absorption between the two calcium supplements was not significantly different. The bone mineral density and bone mineral content of the femur and the tibia increased in the group that consumed insoluble calcium compared with those of the water-soluble calcium supplemented group. However, when considering body weight, the bone mineral density value for all areas, including the spine, was significantly higher in the group that consumed the water-soluble calcium supplement.

Modeling of the Parathyroid Hormone Response after Calcium Intake in Healthy Subjects

  • Ahn, Jae Eun;Jeon, Sangil;Lee, Jongtae;Han, Seunghoon;Yim, Dong-Seok
    • The Korean Journal of Physiology and Pharmacology
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    • v.18 no.3
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    • pp.217-223
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    • 2014
  • Plasma ionized calcium ($Ca^{2+}$) concentrations are tightly regulated in the body and maintained within a narrow range; thus it is challenging to quantify calcium absorption under normal physiologic conditions. This study aimed to develop a mechanistic model for the parathyroid hormone (PTH) response after calcium intake and indirectly compare the difference in oral calcium absorption from PTH responses. PTH and $Ca^{2+}$ concentrations were collected from 24 subjects from a clinical trial performed to evaluate the safety and calcium absorption of Geumjin Thermal Water in comparison with calcium carbonate tablets in healthy subjects. Indirect response models (NONMEM Ver. 7.2.0) were fitted to observed $Ca^{2+}$ and PTH data, respectively, in a manner that absorbed but unobserved $Ca^{2+}$ inhibits the secretion of PTH. Without notable changes in $Ca^{2+}$ levels, PTH responses were modeled and used as a marker for the extent of calcium absorption.

Classification of gallstones using Fourier-transform infrared spectroscopy and photography

  • Ha, Byeong Jo;Park, Sangsoo
    • Biomaterials Research
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    • v.22 no.3
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    • pp.202-209
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    • 2018
  • Background: Gallstones have conventionally been classified by gross inspection into 4 categories: cholesterol gallstones, black pigment (calcium bilirubinate) gallstones, brown gallstones, and mixed gallstones that contain both cholesterol and calcium bilirubinate. Classification using Fourier-transform infrared (FT-IR) spectroscopy supplements gross inspection; however, the issue of ambiguity in gallstone classification has not been fully addressed to date. Methods: Twenty-six gallstones obtained after surgical gallbladder removal were examined using FT-IR spectroscopy and digital photography, and classified into 6 gallstone groups according to characteristic FT-IR absorption bands. Results: FT-IR spectra of nine gallstones matched well with that of pure cholesterol, and the gallstones were thus classified as cholesterol stones. Twelve gallstones were classified as calcium bilirubinate stones as they showed characteristic absorption bands of calcium bilirubinate. However, the FT-IR spectra of these gallstones always showed a broad absorption band of bound water at $3600-2400\;cm^{-1}$. The other five gallstones were classified as mixed stones with combinations of cholesterol, calcium bilirubinate, and calcium carbonate. Conclusion: FT-IR spectroscopy is a powerful and convenient method for gallstone classification. Nevertheless, one should take serious note of the superposition of FT-IR absorption bands of different chemical components of gallstones including that of bound water.

Dietary Intake of Calcium and Absorption Rate of College Women in Korea ( I ) - Seoul Area - (한국인 성인 여자의 칼슘대사에 관한 연구 (I) - 서울 지방 -)

  • Lee, Hyun-Ok
    • Journal of Nutrition and Health
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    • v.13 no.1
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    • pp.37-41
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    • 1980
  • This study was designed to investigate calcium intake, calcium excretion, and calcium absorption rate of the college women in Korea. The subjects of this experiment were five healthy college women aged from 18 to 23 years who lived in Seoul. The period of this experiment was two weeks, the first week was spent in having an ordinary diet and the next week for the experimental diet. Two weeks later, the feces of subjects were collected. Results obtained by the present experiment were as follows: 1) The total food intake from the experimental diet daily was about $1600{\sim}2000g$. 2) The total calcium intake was about $270{\sim}585mg$ and $710{\sim}880mg$ for the ordinary diet and the experimental diet respectively. 3) The daily calcium excretion of feces was about $219{\sim}295mg$. 4) The calcium absorption rate of subjects was about $60{\sim}70%$.

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Effect of Lactose on Calcium Absorption Enhanced by Casein Phosphopeptides in the Rat Small Intestine (Casein Phosphopeptides 의 장관내(腸管內) 칼슘 흡수촉진(吸收促進)에 미치는 유당(乳糖)의 영향(影響))

  • Lee, Yeon-Sook;Naito, Hiroshi
    • Journal of Nutrition and Health
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    • v.15 no.1
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    • pp.1-8
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    • 1982
  • The effects of lactose on the formation of casein phosphopeptide (CPP), the increment of soluble calcium and the enhancement of calcium absorption by dietary casein in the intestinal tract were investigated. Rats were fed a lactose-free diet, 10% lactose diet and 30% lactose diet containing powdered milk. In rats receiving a lactose-free powdered milk diet, CPP formation was confirmed by gel filtration of the intestinal content on Sephadex G -25 and the amount of soluble calcium was increased in the small intestine and calcium absorption, measured by the ligated ideal loops in situ was enhanced. However, In rats receiving a powdered milk diet containing 10% lactose or 30% lactose, the similar effects were not seen. These observations indicate that CPP-stimulated effects on soluble calcium and calcium absorption in the small intestine are not dependent upon lactose.

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The Effects of Dietary Protein and Calcium Levels on Calcium Metabolism in Young Korean Women (한국여성의 단백질 및 칼슘섭취가 칼슘대사에 미치는 영향)

  • 구재옥
    • Journal of Nutrition and Health
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    • v.21 no.2
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    • pp.99-112
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    • 1988
  • This study was performed to investigate the effects of dietary protein and calcium levels on calcium metabolism in eight healthy Korean adult females. The 2-day metabolic study consisted of a 2 day adaptation period and three 6-day experimental periods. Three experimental diets were low protein low calcium(LPLCa : protein 44g, Ca 422mg), higher protein low calcium(HPLCa : protein 85g, Ca 365mg), and high protein high calcium (HPHCa : protein 84g, Ca 727mg). The apparent calcium absorption was likely to be affected by the calcium intake rather than by the protein intake. Average calcium absorption rate was about 23-29% of calcium intake. The calcium balance was -21.44mg for LPCa, -25.02mg for HPLCa, and -3.22mg for HPHCa. Avergae urinary calcium excretion was 127.7mg for LPLCa, 108.6mg for HPLCa, and 215.4mg for HPHCa. Urinary calcium excretion was more closely related to the changes of calcium intake rather than of protein intake. These results seemed to be due to the interactions between the high phosphours contained in the high protein diet and the little discrepancy of protein intake levels.

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Foliar Absorption Rates of 45Ca-labeled Calcium Compounds Applied on Tomato and Citrus Leaves (45Ca 표지 칼슘 화합물별 토마토와 감귤의 엽면 흡수율)

  • Song, Sung-Jun;Kim, Yang-Rok;Han, Seung-Gap;Kang, Young-Gil
    • Korean Journal of Soil Science and Fertilizer
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    • v.39 no.2
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    • pp.80-85
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    • 2006
  • The foliar injuries and absorption rates of calcium compounds in tomato (Lycopersicon esculentum cv. momotaro) and citrus [Shiranuhi(C. Marc. ${\time}C$. sinensis Osbeck)${\time}C$. reticulata Blanco)] were investigated. 0.3, 0.5 and 1.0% of $CaCl_2$, $Ca(NO_3)_2$, $Ca(H_2PO_4)_2$, Ca-EDTA, Ca formate or Ca acetate solution were applied to the leaves of tomato and citrus. The leaf burns were observed only in the foliar applications of Ca-EDTA and $Ca(H_2PO_4)_2$. Ca-EDTA exhibited more serious foliar injury than CaH2PO4. As applied with $^{45}CaCl_2$, $^{45}Ca(NO_3)_2$, $^{45}Ca$ formate or $^{45}Ca$ acetate, the rates of Ca absorptions by tomato and citrus leaves for 7 days were 17 to 32% and 6.6 to 46%, respectively. It meant that the absorption was differently influenced on calcium compounds. In tomato, the order of Ca foliar absorption was $Ca(NO_3)_2$ > Ca formate = $CaCl_2$ > Ca acetate. Although there was no difference in Ca absorption between the adaxial and abaxial parts of tomato leaves, total absorption was greater in expanded leaves than in expanding ones. On the other hand, in citrus Ca foliar absorption from $Ca(NO_3)_2$ or Ca formate was more active than that from $CaCl_2$ or Ca acetate. In conclusion, $Ca(NO_3)_2$ and Ca formate are recommended for the foliar application of Ca in tomato and citrus in order to increase absorption of Ca into their leaves.