scholarly journals Glycemic Index and Insulinemic Index of Foods: An Interlaboratory Study Using the ISO 2010 Method

Nutrients ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 2218 ◽  
Author(s):  
Wolever ◽  
Meynier ◽  
Jenkins ◽  
Brand-Miller ◽  
Atkinson ◽  
...  
Keyword(s):  
Glycemic Index ◽  
Interlaboratory Study ◽  
Official Method ◽  
Significant Difference ◽  
Insulinemic Index ◽  
The Mean ◽  
Standard Deviations ◽  
Mean Glucose ◽  
Insulin Responses ◽  
Food Laboratory

An official method for determining food glycemic index (GI) was published by the Organization for International Standardization (ISO) in 2010, but its performance has not been assessed. Therefore, we aimed to determine the intra- and inter-laboratory variation of food GI values measured using the 2010 ISO method. Three laboratories (Australia, Canada and France) determined the GI and insulinemic-index (II) of six foods in groups of 13–15 participants using the 2010 ISO method and intra- and inter-laboratory Standard Deviations (SDs) were calculated. Overall mean food GIs varied from 47 to 86 (p < 0.0001) with no significant difference among labs (p = 0.57) and no food × laboratory interaction (p = 0.20). Within-laboratory SD was similar among foods (range, 17.8–22.5; p = 0.49) but varied among laboratories (range 17.5–23.1; p = 0.047). Between-laboratory SD of mean food GI values ranged from 1.6 to 6.7 (mean, 5.1). Mean glucose and insulin responses varied among foods (p < 0.001) with insulin (p = 0.0037), but not glucose (p = 0.054), varying significantly among labs. Mean II varied among foods (p < 0.001) but not among labs (p = 0.94). In conclusion, we found that using the 2010 ISO method, the mean between-laboratory SD of GI was 5.1. This suggests that the ISO method is sufficiently precise to distinguish a mean GI = 55 from a mean GI ≥ 70 with 97–99% probability.

OBSERVATIONS OF TOTAL SERUM BASE IN CHILDREN AND YOUNG ADULTS BY A CONDUCTIVITY METHOD

PEDIATRICS ◽  
1949 ◽  
Vol 4 (6) ◽  
pp. 805-809
Author(s):  
W. M. KELSEY ◽  
L. B. LEINBACH
Keyword(s):  
Young Adults ◽  
Total Serum ◽  
Age Group ◽  
Conductivity Method ◽  
Normal Children ◽  
Significant Difference ◽  
Children And Young Adults ◽  
The Mean ◽  
Standard Deviations

Values for total serum base in 96 normal children under 12 years of age as determined by the conductivity method fell between 143 to 160.5 mEq./l. The mean was 153. Standard deviations for each age group are given. The values in 73 normal persons above the age of 12 varied from 142 to 160.5 mEq./l. The mean was 147 mEq./l. A statistically significant difference between the total serum base in children and adults was found.

Assay of Thiamine in Foods, Using Manual and Semiautomated Fluorometric and Microbiological Methods

1977 ◽  
Vol 60 (3) ◽  
pp. 522-527
Author(s):  
Phillip W Defibaugh ◽  
Jeffrey S Smith ◽  
Cora E Weeks
Keyword(s):  
Accurate Method ◽  
Official Method ◽  
Thiamine Hydrochloride ◽  
Fluorescent Method ◽  
Microbiological Methods ◽  
The Mean ◽  
Standard Deviations ◽  
Clam Tissue ◽  
Semiautomated Method

Abstract Three methods for the determination of thiamine in foods were evaluated for accuracy, recovery, and precision: a manual fluorescent method, a semiautomated fluorescent method, and a Lactobacillus viridescens microbiological assay. Thiamine in the samples was destroyed with clam tissue thiaminase; a known amount of thiamine hydrochloride was then added to the extract; and the thiamine recovery was determined. For 14 commercially processed food products analyzed by the manual and semiautomated methods, the mean per cent recovery values and standard deviations were 91.2±8.92 and 99.3±3.13%, respectively. Eight of these products were analyzed by all 3 methods. The mean per cent recoveries and standard deviations for these 8 samples were 90.7±8.97, 101±2.52, and 99.9± 1.03%, respectively, for the manual, semiautomated, and microbiological methods. The microbiological method with L. viridescens gave the best results for the products tested. The concentration of vitamin which can be measured is such that samples of low label declaration present no problems. The semiautomated method offers a rapid and accurate method of thiamine assay. The chemical reactions are identical to those of the official method. The major difference between the methods is in the sample cleanup. It is postulated that the low recovery observed for the manual method is due to incomplete elution of thiamine in the column purification step.

scholarly journals Formulation and Quality Evaluation of Foxtail Millet and Semolina Incorporated Ready-To-Cook Upma Mix

2021 ◽  
Vol 14 (4) ◽  
pp. 1531-1537
Author(s):  
D. Karuna Thara
Keyword(s):  
Glycemic Index ◽  
Foxtail Millet ◽  
Nutritional Composition ◽  
Soluble Fibre ◽  
Standard Procedures ◽  
Insoluble Fibre ◽  
Significant Difference ◽  
The Mean ◽  
Index Value

Traditional cuisine has risen to the top of the consumer’s list of preferences. Many traditional cereal-based dishes have been processed, and instant mixes such as instant upma, idli, and dosa have been made. Comfort foods are foods that require little or no processing or cooking before consumption, making them more convenient for the user. Ready to Cook (RTC) and instant foods have grown highly popular as a result of increased urbanization and industrialization, owing to today’s lifestyle and the need for quick-to-serve cuisine.The study’s goal is to develop an RTC upma mix and evaluate its physicochemical, texture, sensory, and in vitro glycemic index. The millet was collected and pre-processing was done to develop the ready-to-cook mixes. The levels of millet incorporation ratio were 60% (V1), 70% (V2), and 80% (V3) levels. Standard procedures were used to determine the physicochemical, textural, sensory, and in vitro glycemic index. The nutritional composition of V3 was found to be high, with moisture, carbohydrate, protein, fat, fibre, soluble fibre, and insoluble fibre content of 6.4 percent, 73.6g, 8.5g, 6.2g, 6.6g, 2.4g, and 0.56g, respectively.The textural profile showed a significant difference (p<0.05) between variations in comparison with the standard. Results on sensory evaluation showed that 70% foxtail millet upma mix shows high acceptable than other. The mean in vitro glycemic index of the control upma mix was 68.7 ± 0.12, while the mean estimated glycemic index value of V1, V2, and V3 was50.5 ± 0.5, 49.8 ± 0.4, and 49.2± 0.6 respectively. Thus, the result evident that all the developed RTC upma mixes exhibited a low glycemic index and were useful for Diabetic subjects and easy to carry as a journey food.

IMPORTANCE OF AGE, SEX AND BODY HABITUS IN THE DIAGNOSIS OF LEFT VENTRICULAR HYPERTROPHY FROM THE PRECORDIAL ELECTROCARDIOGRAM IN CHILDHOOD AND ADOLESCENCE

PEDIATRICS ◽  
1961 ◽  
Vol 28 (5) ◽  
pp. 705-711
Author(s):  
Colin H. M. Walker ◽  
Raymond L. Rose
Keyword(s):  
Left Ventricular Hypertrophy ◽  
Ventricular Hypertrophy ◽  
Left Ventricular ◽  
Childhood And Adolescence ◽  
Age Group ◽  
Body Habitus ◽  
Normal Individuals ◽  
Significant Difference ◽  
The Mean ◽  
Standard Deviations

The electrocardiographic records of 849 normal individuals between the age of 1 and 16 years were studied, and the arithmetic sum of the voltages SV2 and RV5 were calculated. Values considerably in excess of those usually quoted were found to exist in this age group, the mean being 38.0 mm ± 9.7 and the range 15 mm to 65 mm. A new set of means and standard deviations for this index have been prepared. Variations in these values are evident with advancing age, and these appear to be related to sex. Whereas there is no difference in voltages between the sexes in children under the age of 11 years, over this age the females present values which become progressively smaller with the advance of puberty (both in relation to their previous values and to the values found in males), reaching a mean level 17 mm lower than that of the males by the age of 16 years. The males show no significant difference in voltage after and before the age of 11 years, while the females do. The possible causes for these trends have been briefly discussed. As a result of this study and in contradistinction to adult experience it is considered unwise to rely on precordial voltage alone as an index of left ventricular hypertrophy unless the SV2 + RV5 value is greater than 60 mm in children less than 11 years of age, or greater than 55 mm in females and 65 mm in males past 11 years of age.

A New Method for Determining Impulsive Time Constants and Their Application to Clinical Data

1978 ◽  
Vol 86 (1) ◽  
pp. ORL-81-ORL-89 ◽  
Author(s):  
Andrew W. Sills ◽  
Vicente Honrubia
Keyword(s):  
Clinical Data ◽  
Convenient Method ◽  
Normal Values ◽  
Normal Subjects ◽  
New Method ◽  
Time Constants ◽  
Mean Values ◽  
Significant Difference ◽  
The Mean ◽  
Standard Deviations

We have developed an accurate, convenient method for determining unique values of vestibular time constants from impulsive tests. The method was used to determine the mean values and standard deviations of 36 normal subjects. A comparison between these normal values and data from patients with cerebellopontine (CP) angle tumors or unilateral peripheral vestibular lesions showed no significant difference in the values of the time constants. We conclude that shape-descriptive parameters such as time constants cannot differentiate between subjects and patients.

Vowel Recognition Threshold as a Function of Temporal Segmentations

1970 ◽  
Vol 13 (4) ◽  
pp. 715-724 ◽  
Author(s):  
Richard L. Powell ◽  
Oscar Tosi
Keyword(s):  
Normal Hearing ◽  
Recognition Threshold ◽  
Vowel Sound ◽  
Significant Difference ◽  
The Mean ◽  
Vowel Recognition ◽  
Temporal Segment

Vowels were segmented into 15 different temporal segments taken from the middle of the vowel and ranging from 4 to 60 msecs, then presented to 6 subjects with normal hearing. The mean temporal-segment recognition threshold of 15 msecs with a range from 9.3 msecs for the /u/ to 27.2 milliseconds for the /a/. Misidenti-fication of vowels was most often confused with the vowel sound adjacent to it on the vowel-hump diagram. There was no significant difference between the cardinal and noncardinal vowels.

Left Ventricular Dysfunction and Blood Glycohemoglobin Levels in Young Diabetics

1991 ◽  
Vol 30 (05) ◽  
pp. 183-188
Author(s):  
A. Aydrner ◽  
A. Oto ◽  
E. Oram ◽  
O. Gedik ◽  
C. F. Bekdik ◽  
...  
Keyword(s):  
Ejection Fraction ◽  
Left Ventricular Function ◽  
Ventricular Function ◽  
Left Ventricular ◽  
Diabetic Patients ◽  
Filling Fraction ◽  
Time To Peak ◽  
Significant Difference ◽  
The Mean ◽  
Hba1c Levels

Left ventricular function including regional wall motion (RWM) was evaluated by 99mTc first-pass and equilibrium gated blood pool ventriculography and glycohemoglobin (HbA1c) blood levels determined by a quantitative column technique in 25 young patients with insulin-dependent diabetes mellitus without clinical evidence of heart disease, and in healthy controls matched for age and sex. Phase analysis revealed abnormal RWM in 19 of 21 diabetic patients. The mean left ventricular global ejection fraction, the mean regional ejection fraction and the mean 1/3 filling fraction were lower and the time to peak ejection, the time to peak filling and the time to peak ejection /cardiac cycle were longer in diabetics than in controls. We found high HbA1c levels in all diabetics. There was no significant difference between patients with and without retinopathy and with and without peripheral neuropathy in terms of left ventricular function and HbA1c levels.

Detection of Circulating Tissue Factor and Factor VII in a Normal Population

1996 ◽  
Vol 75 (05) ◽  
pp. 772-777 ◽  
Author(s):  
Sybille Albrecht ◽  
Matthias Kotzsch ◽  
Gabriele Siegert ◽  
Thomas Luther ◽  
Heinz Großmann ◽  
...  
Keyword(s):  
Tissue Factor ◽  
Normal Population ◽  
Mean Value ◽  
Factor Vii ◽  
Significant Difference ◽  
Age Dependent ◽  
The Mean ◽  
Highly Correlated ◽  
And Gender

SummaryThe plasma tissue factor (TF) concentration was correlated to factor VII concentration (FVIIag) and factor VII activity (FVIIc) in 498 healthy volunteers ranging in age from 17 to 64 years. Immunoassays using monoclonal antibodies (mAbs) were developed for the determination of TF and FVIIag in plasma. The mAbs and the test systems were characterized. The mean value of the TF concentration was 172 ± 135 pg/ml. TF showed no age- and gender-related differences. For the total population, FVIIc, determined by a clotting test, was 110 ± 15% and the factor VIlag was 0.77 ± 0.19 μg/ml. FVII activity was significantly increased with age, whereas the concentration demonstrated no correlation to age in this population. FVII concentration is highly correlated with the activity as measured by clotting assay using rabbit thromboplastin. The ratio between FVIIc and FVIIag was not age-dependent, but demonstrated a significant difference between men and women. Between TF and FVII we could not detect a correlation.

Multi-Center Study of Thromboplastin Calibration Precision – Influence of Reagent Species, Composition, and International Sensitivity Index (ISI)

1993 ◽  
Vol 69 (01) ◽  
pp. 035-040 ◽  
Author(s):  
A M H P van den Besselaar ◽  
R M Bertina
Keyword(s):  
Oral Anticoagulants ◽  
International Normalized Ratio ◽  
The Other ◽  
World Health ◽  
Rabbit Brain ◽  
Sensitivity Index ◽  
Bovine Plasma ◽  
Significant Difference ◽  
The Mean ◽  
International Sensitivity Index

SummaryFour thromboplastin reagents were tested by 18 laboratories in Europe, North-America, and Australasia, according to a detailed protocol. One thromboplastin was the International Reference Preparation for ox brain thromboplastin combined with adsorbed bovine plasma (coded OBT/79), and the second was a certified reference material for rabbit brain thromboplastin, plain (coded CRM 149R). The other two thromboplastin reagents were another rabbit plain brain thromboplastin (RP) with a lower ISI than CRM 149R and a rabbit brain thromboplastin combined with adsorbed bovine plasma (RC). Calibration of the latter two reagents was performed according to methods recommended by the World Health Organization (W. H. O.).The purpose of this study was to answer the following questions: 1) Is the calibration of the RC reagent more precise against the bovine/combined (OBT/79) than against the rabbit/plain reagent (CRM 149R)? 2) Is the precision of calibration influenced by the magnitude of the International Sensitivity Index (ISI)?The lowest inter-laboratory variation of ISI was observed in the calibration of the rabbit/plain reagent (RP) against the other rabbit/plain reagent (CRM 149R) (CV 1.6%). The highest interlaboratory variation was obtained in the calibration of rabbit/plain (RP) against bovine/combined (OBT/79) (CV 5.1%). In the calibration of the rabbit/combined (RC) reagent, there was no difference in precision between OBT/79 (CV 4.3%) and CRM 149R (CV 4.2%). Furthermore, there was no significant difference in the precision of the ISI of RC obtained with CRM 149R (ISI = 1.343) and the rabbit/plain (RP) reagent with ISI = 1.14. In conclusion, the calibration of RC could be performed with similar precision with either OBT/79 or CRM 149R, or RP.The mean ISI values calculated with OBT/79 and CRM 149R were practically identical, indicating that there is no bias in the ISI of these reference preparations and that these reference preparations have been stable since their original calibration studies in 1979 and 1987, respectively.International Normalized Ratio (INR) equivalents were calculated for a lyophilized control plasma derived from patients treated with oral anticoagulants. There were small but significant differences in the mean INR equivalents between the bovine and rabbit thromboplastins. There were no differences in the interlaboratory variation of the INR equivalents, when the four thromboplastins were compared.

Incubation Temperature Influences the Duration of Egg Hatching and Early Development in the Boreal Digging Frog, Kaloula Borealis

2020 ◽  
Vol 3 (1) ◽  
pp. ACCEPTED
Author(s):  
Rho-Jeong Rae
Keyword(s):  
Water Temperature ◽  
Early Life ◽  
Rainy Season ◽  
Incubation Temperature ◽  
Life Stages ◽  
Early Life Stages ◽  
Egg Hatching ◽  
Significant Difference ◽  
The Mean ◽  
Hatching Rates

This study investigated the boreal digging frog, Kaloula borealis, to determine the egg hatching period and whether the hatching period is affected by incubation temperature. The results of this study showed that all the eggs hatched within 48 h after spawning, with 28.1% (±10.8, n=52) hatching within 24 h and 99.9% (±0.23, n=49) within 48 h after spawning. A significant difference was noted in the mean hatching proportion of tadpoles at different water temperatures. The mean hatching rates between 15 and 24 h after spawning was higher at a water temperature of 21.1 (±0.2) °C than at 24.1 (±0.2) °C. These results suggest that incubation temperature affected the early life stages of the boreal digging frog, since they spawn in ponds or puddles that form during the rainy season.

Sign in / Sign up

Export Citation Format

Share Document