The effect of 0% (all-beef) and 30% replacement of beef by hydrated
soy protein concentrate (beef-soy) on vitamin B₆ retention in meat
loaves was investigated. Vitamin B₆, moisture, fat and nitrogen contents
were determined in raw meat loaf mixtures, as well as in freshly baked,
held, chilled and microwave reheated...
The nutritional impact of snacking on the diets of female,
freshman college students between the ages of 17 and 20 years was
assessed. Sixty-five women living in freshman residence halls at
Oregon State University recorded their dietary intakes and eating
habits for four days. Questionnaires concerning eating and activity
patterns...
The effect of oral contraceptives on the urinary excretion of
several methionine metabolites was determined in women before and
after they had received a 3-g dose of L-methionine. Nine women
between the ages of 20-29 years served as subjects: five had been
using a combination-type oral contraceptive for six months...
Pyridoxal phosphate is a coenzyme in about 50 known enzymatic
reactions. A simple and accurate method for the determination of
pyridoxal phosphate would be desirable because it could provide a
means to assess the nutritional status of vitamin B₆ in the human.
The cyanohydrin methods to determine pyridoxal phosphate appear...
The urinary excretion of 4-pyridoxic acid (PIC), the principle
end-product of vitamin B₆ metabolism found in human urine, was
measured in two populations in whom altered vitamin B₆ metabolism
has been reported: in women who use oral contraceptives and in
mental retardates with and without Down's syndrome.
In the first...
This investigation was undertaken to obtain information on the
dietary intake of Oregon preschool children and to determine the
effect of certain socio-environmental variables on the nutrient intake
of these children. Three hundred boys and girls who were attending
Well Child or Multiphasic Screening Clinics in 11 counties participated
in...
Erythrocyte glutamic-pyruvic transaminase (EGPT) and
glutamic-oxaloacetic transaminase (EGOT) activities reflect
vitamin B₆ status in humans (Baysal, Johnson, and Linkswiler,
1966). Pyridoxal phosphate (PALPO), an active form
of vitamin B₆, serves as the coenzyme for these transaminases.
Compared to other methods of vitamin B₆ assessment,
transaminase measurement has the advantage of...
We investigated the effect of pyridoxine
supplementation on the utilization of protein in a low-protein,
plant-based diet in four subjects (2 men and
2 women), aged 21 to 38 years. Following two days of a
negligible protein diet, this 34 day study was divided into
three dietary periods: the subjects...
The nutrient intake of forty-five participants in
the Title IIIc Elderly Nutrition Program in rural
Oregon was assessed through 7-day dietary records. The
1980 Recommended Dietary Allowances (RDA) were used to
assess adequacy of intake. There were no
statistically significant differences between the 7-
day nutrient intakes of those who...
The purpose of this research was to examine some of
the factors which may affect body composition of
postmenopausal women. The effect of estrogen, physical
activity, diet and lifestyle were examined in 9 women
receiving estrogen replacement therapy and 11 women not
using this drug. For 3 consecutive days, the...
The effect of pyridoxine (PN) supplementation on lymphocyte
responsiveness was investigated in 15 elderly volunteers (aged
65-81 years) by measuring lymphocyte proliferation to T and B cell
mitogens, lymphocyte subpopulations with monoclonal antibodies
(T3, T4, T8) and plasma pyridoxal 5'-phosphate (PLP) concentration
at pre-supplementation and after 1 and 2 months...
Riboflavin status was determined in 16 Oriental
males and females who were residing off the Oregon State
University campus. Before and after these subjects had
received 10 mg of riboflavin daily for 7 days, we measured
erythrocyte glutathione reductase (EGR) activity with and
without FAD added in vitro and erythrocyte...
This investigation was conducted to determine the
effect of estrogen replacement therapy (ERT) on vitamin B-6
status of postmenopausal women. Nineteen postmenopausal
women served as subjects. Nine (54.7 + 4.7 years) were
taking ERT (experimental group); ten (56.8 + 2.3 years)
were not (control group). For three consecutive days,
subjects...
The effect of dietary glycosylated vitamin B-6 on the bioavailability
of vitamin B-6 was determined in 4 women. A 44-d metabolic-balance diet
study was divided into a preliminary 8-d adjustment period followed by
two 18-d experimental periods. The subjects were divided into two groups
in a crossover design to compare...
The bioavailability of niacin from tuna fish, peanut butter
and whole wheat bread was estimated in eight men aged 21 to 30 years.
Following a 10-day adjustment period, each test food, which was added
to a constant basal diet, was fed for 14 days; the order in which
these three...
The bioavailability of vitamin B-6 from four selected
foods was investigated in five men, aged 22 to 25 years,
who were receiving a pyridoxine supplement. The subjects
received a constant diet containing 1.34 mg of vitamin B-6
throughout this five-week study, except on Saturdays and
Sundays when they ate their...
Two studies which were similar in protocol were conducted.
Following a preliminary baseline period of 7 days, in which the
subjects consumed their self-chosen diets, they received 3 eggs daily
for 4 weeks. Depending upon the changes in plasma cholesterol in
response to 3 eggs daily, the subjects in studies...
The influence of riboflavin doses on the urinary excretion of
riboflavin and 4-pyridoxic acid was investigated in 6 young men.
Doses of crystalline riboflavin and/or pyridoxine were administered
on days 10 to 25 using a 6 X 6 Latin square design. The 6
crystalline vitamin doses given were: 0.3 mg...
The effect of oral contraceptives on urinary and plasma vitamin
B₆ as well as erythrocyte transaminase activities was investigated in
women. Five women who were taking oral contraceptives and four
who were not using these drugs served as subjects. They were
apparently healthy and free from any known metabolic disorder....
We examined the nutrient intake of women with rheumatoid arthritis
(RA) before and after initiation of treatment with arthritis medication.
Results of past (before taking arthritis medication) and present diets of RA
subjects were compared to the past and present diets of the non-RA group.
Subjects with RA were 19...
The objective of this research was to indirectly determine the
existence of a possible retinal-endocrine pathway activated, or
Inhibited, by artificial fluorescent light as evidenced by it subsequent
effects on bone metabolism. Forty-eight male Long-Evans post-breeder
rats, half of which were bilaterally orbitally enucleated, were
used in this experiment. A...
The effect of pyridoxine (PN) supplementation on the activities
of erythrocyte alanine aminotransferase (EAlaAT) and aspartate aminotransferase
(EAspAT) was observed in five men, aged 22 to 25 years.
The subjects received a constant diet containing 1.34 mg of vitamin
B-6 Monday through Friday of each week during this five-week study....
The bioavailability of vitamin B₆ in four selected foods
(bananas, filberts, soybeans and beef) was determined in five men,
aged 22 to 25 years, who were saturated with pyridoxine. The study
consisted of a five-day adjustment period followed by a 28-day experimental
period. All subjects consumed a constant diet containing...
The purpose of this study was to assess the amount of
sodium in the diet of normal adults. The population consisted
of 86 adults, 49 females and 37 males, who were
participants in the Family Heart Study (FHS). Of this
population 26 were studied during the baseline assessment
period and...
This study investigated the effect of cooking on the
neutral detergent fiber (NDF) content of cauliflower and
carrots. For each replication the vegetable was divided
in half to serve as its own control. One half was used
raw and the other half was cooked in 60 ml of distilled
water...
The influence of a diet containing salmon flesh and
its oil on plasma lipids, cholesterol absorption, as well
as fecal neutral and acidic steroid excretion was studied.
Two female and four male normolipidemic subjects were
fed diets containing approximately 40% of their caloric
intake from salmon oil, polyunsaturated vegetable oil...
Thiamin and ascorbic acid content and retention were determined
in raw, blanched, pouched and canned green beans immediately
after processing and after storage for four months at room temperature
or at 37.5°C. Ascorbic acid was also determined in raw, pouched
and canned Royal Ann cherries immediately after processing and after...
We compared a kinetic method (KM) and a colorimetric method (CM) for
measuring erythrocyte aspartate aminotransferase (EAST) activity. Twenty-three
healthy college students including 7 men and 16 women, aged from 22 to 40 years,
participated in this study. Vitamin B-6 status was assessed by EAST activity
coefficient (EAST-AC), the ratio...
The effect of cooked wheat bran on the excretion of
fecal nutrients, fecal weight, and transit time was investigated
in 10 men, aged 20 to 35 years. The study was
divided into three 18-day periods. The subjects were
divided into two groups; one received the basal diet supplemented
with 15...