Nychthemeral and seasonal patterns of thermoregulation in cattle

1968 ◽  
Vol 19 (1) ◽  
pp. 181 ◽  
Author(s):  
A Berman
Keyword(s):  
Heat Production ◽  
Feed Intake ◽  
Seasonal Changes ◽  
Late Summer ◽  
Rate Of Change ◽  
Feeding Groups ◽  
Group A ◽  
The Mean ◽  
Group 5 ◽  
The Relationship

1. The nychthemeral (24 hr) and seasonal cycles in thermoregulation at high (Fh) and standard (Fs) levels of feeding were studied in Holstein heifers during spring (mean daily air temperature 18.2°C) and late summer (mean daily air temp. 27.5°). 2. In the two seasons the percentage respiratory evaporative cooling (% RC) and rectal temperature (Tr) displayed marked nychthemeral cycles in both feeding groups, while heat production (Hp) cycles were evident in the Fh group only. 3. In both seasons the effect of the 22.4% larger Hp in the Fhgroup was to prolong the duration of higher % RC; Tr was relatively increased in the summer only. 4. The seasonal changes were: a 20% reduction in Hp in both groups; a larger amplitude of Hp cycling (19% of the mean in summer and 12.9% in spring) in the Fh group; a higher Tr (+ 0.40°C in the Fs group and + 0.63° in the Fh group), cycling with a larger amplitude (0.33° v. 0.52°); a 21° depression in feed intake in the Fh group and 9° in the Fs group. 5. Within each season Tr and the rate of change in Tr were significantly correlated with Hp in the Fh group only. On a between-season basis Hp and Tr were significantly correlated in both feeding groups. These suggest that the relationship between body temperature and heat production follows different patterns in nychthemeral cycles from those in seasonal changes. 6. The nychthemeral patterns of respiratory, %RC, Tr, and Hp responses indicated that the animals were acclimatized to the seasonal change in Tr, possible through a shift in the set-point for temperature control. The depression in heat production and feed intake did not prevent the maintenance of a normal rate of growth.

scholarly journals Effects of Language Learning Strategies and Learners’ Motivation on Students’ Learning Achievement

2015 ◽  
Vol 3 (2) ◽  
pp. 132 ◽  
Author(s):  
Hao-Yuan Cheng ◽  
Nai-Ying Chang
Keyword(s):  
Language Learning ◽  
Learning Strategies ◽  
Language Learning Strategies ◽  
Course Performance ◽  
Test Analysis ◽  
New Information ◽  
Significant Difference ◽  
Group A ◽  
The Mean ◽  
The Relationship

<p>This study investigated whether learning strategies had made any impact on learners’ achievement and explored whether learning motivation was correlated with learning strategies. The participants of this study were the students from the EFL (English as a Foreign Language) intermediate level course at a college in Taiwan. The students were given a pretest and a posttest. The mean scores of these tests were compared with a SILL survey (Strategies Inventory for Language Learning) at the end of the investigation. The participants’ course performance was compared with their use of learning strategies. The assumption of the relationship between learning strategies and motivation is that motivated learners have a greater desire to seek out solutions or support from others and employ more strategies to process the new information. The results of this investigation revealed that only the memory strategies had a significant difference in the posttest of Group A on the independent sample t-test analysis.</p>

scholarly journals Effects of Feed Intake and Behavior on the Relationship between Heart Rate and Heat Production, and the Evaluation of Energy Balance in Holstein Heifers

1993 ◽  
Vol 64 (4) ◽  
pp. 403-410 ◽  
Author(s):  
Takaaki MATSUMOTO ◽  
B. P. PURWANTO ◽  
Fumio NAKAMASU ◽  
Toshio ITO ◽  
Sadaki YAMAMOTO
Keyword(s):  
Heart Rate ◽  
Energy Balance ◽  
Heat Production ◽  
Feed Intake ◽  
And Behavior ◽  
The Relationship

Cervical malalignment after laminoplasty: relationship to deep extensor musculature of the cervical spine and neurological outcome

2007 ◽  
Vol 7 (6) ◽  
pp. 610-614 ◽  
Author(s):  
Haku Iizuka ◽  
Takashi Nakajima ◽  
Yoichi Iizuka ◽  
Yasunori Sorimachi ◽  
Tsuyoshi Ara ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Neurological Outcome ◽  
Neurological Recovery ◽  
Cervical Lordosis ◽  
Cervical Alignment ◽  
Female Patients ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
The Relationship

Object The goal of this study was to investigate the relationship between preservation of the insertion of the deep extensor musculature of the cervical spine at C-2 and postoperative cervical alignment, especially differences between cases involving male and female patients, as well as the relationship between the loss of cervical lordosis and neurological outcome after laminoplasty. Methods The authors reviewed the records of 50 patients who underwent laminoplasty to elevate the C-3 lamina with repair of the deep extensor musculature (Group A) and 31 patients who underwent laminoplasty by C-3 dome laminotomy or laminectomy (Group B). They compared the degree of cervical lordosis after laminoplasty with preoperative measurements. Neurological function at last follow-up was also compared with preoperative assessments. Results In Group A, the mean values for pre- and postoperative cervical lordosis were 14.5 and 10.9°, respectively (p > 0.18). In female patients, however, the pre- and postoperative means were 14.4 and 3.7°, respectively (p < 0.004). In Group B, the overall means for pre- and postoperative cervical lordosis were 17.3 and 19.1°, respectively (p > 0.48); the corresponding means for female patients were 15.0 and 14.1° (p > 0.83). The mean percentages of neurological recovery were 54.1% in Group A and 54.8% in Group B. Conclusions Preservation of the insertion of the deep extensor musculature to the C-2 spinous process prevented significant changes in cervical alignment after laminoplasty, even among female patients. Neurological recovery was not affected by the loss of cervical lordosis.

scholarly journals Ergovaline, an endophytic alkaloid. 2. Intake and impact on animal production, with reference to New Zealand

2016 ◽  
Vol 56 (11) ◽  
pp. 1775 ◽  
Author(s):  
A. M. Nicol ◽  
J. L. Klotz
Keyword(s):  
New Zealand ◽  
Daily Intake ◽  
Late Summer ◽  
Animal Production ◽  
Deterrent Effect ◽  
Welfare Implications ◽  
The Mean ◽  
Supplementary Feed ◽  
The Impact ◽  
The Relationship

On the basis of published reports, the daily intake of the alkaloid ergovaline from the consumption of endophyte-containing ryegrass in New Zealand ranges from 0.008 to 0.287 mg ergovaline/kg LW0.75.day. Most of the reports are based on the use of standard endophyte-containing ryegrass and, thus, it is difficult to disassociate the impact of ergovaline consumption from that of lolitrem B. However, physiological effects of ergovaline consumption, such as reduced circulating prolactin concentration, vasoconstriction and elevated core temperature, have been detected at fairly low ergovaline intake, whereas decreased feed intake, liveweight gain and milk production have not generally been observed in animals at an intake below 0.07 mg ergovaline/kg LW0.75.day. Intakes above this value represent only 17% of published values. There are insufficient data to suggest a threshold ergovaline intake associated with heat stress with animal-welfare implications. The relationship between published ergovaline intake and the corresponding ergovaline concentration in pasture is poor (R2 = 0.48), but on average an intake of 0.07 ergovaline/kg LW0.75.day is associated with an ergovaline concentration in ryegrass of 0.70 mg/kg DM. About 16–18% of published ergovaline concentrations in ryegrass pasture exceed this value. The ergovaline concentration in ryegrass is greater in the basal parts of the plant than in the leaf and during the late summer–autumn than in spring. Animals grazing in the lower sward horizons (horizontal grazing plane) are more at risk of high ergovaline intake, although the reduction in grazing intake induced by grazing at low pasture height aids in limiting ergovaline intake. As pasture growth rates decline in late summer, supplementary feed may be used to maintain stocking rate and, if such feeds have zero ergovaline concentration, they serve to dilute the mean dietary ergovaline intake. Ergovaline-containing ryegrass pastures are widely used in New Zealand. It appears that farmers consider the risks of depressed animal production on these pastures to be less than the benefits ergovaline bestows through its deterrent effect of specific insect attack and thus greater survival and pasture persistence.

Relationship Between Gingivitis and Anterior Teeth Irregularities Among 18 to 26 Years Age Group: A Hospital Based Study in Belgaum, Karnataka

2010 ◽  
Vol 4 (3) ◽  
pp. 61-66
Author(s):  
Anil Ankola ◽  
V. Chandrasekhara Reddy ◽  
B R Ashok Kumar
Keyword(s):  
Control Group ◽  
Dental Arch ◽  
Study Group ◽  
Age Group ◽  
Gingival Index ◽  
Anterior Teeth ◽  
Group A ◽  
The Mean ◽  
Anterior Segments ◽  
The Relationship

ABSTRACT Aim To study the relationship between gingivitis and irregular teeth in the anterior segments of dental arches. Materials & Methods The sample size of 120 subjects who satisfied the inclusion criteria was randomly selected for the study. These subjects were selected between the age group of 18 to 26 years and divided into two groups. The study group (cases) consists of 60 subjects with irregular teeth in the anterior segments of dental arch. The control group (controls) consists of 60 subjects with well-aligned teeth in the anterior segments of dental arches. Results The mean gingival index of cases & controls were 0.9513 and 0.5959 with standard deviations of 0.7014 and 0.4909 respectively. The t-value was 3.1093 with p<0.001 which was highly significant. Conclusion The mean gingival index of study group was higher than the gingival score of the control group (P<0.001).

scholarly journals Efficacy and adverse events related to the initial dose of methimazole in children and adolescents with Graves’ disease

2021 ◽  
Vol 26 (3) ◽  
pp. 199-204
Author(s):  
Hyun Gyung Lee ◽  
Eun Mi Yang ◽  
Chan Jong Kim
Keyword(s):  
Adverse Events ◽  
Children And Adolescents ◽  
Liver Dysfunction ◽  
Initial Dose ◽  
Graves Disease ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
The Relationship ◽  
Mean Time

Purpose: The first-line antithyroid drug for children and adolescents with Graves’ disease (GD) is methimazole (MMI). This study evaluated the relationship between the initial MMI dose and the clinical course of GD after treatment.Methods: We studied the efficacy of the initial MMI dose and the relationship between the initial MMI dose and adverse events (AEs). We retrospectively enrolled 22 males and 77 females and divided those subjects into 3 groups according to the initial dose of MMI: <0.4 mg/kg/day (group A; n=32); 0.4–0.7 mg/kg/day (group B; n=39); and >0.7 mg/kg/day (group C; n=28).Results: The mean time to the normalization of free thyroxine (fT4) levels upon initial treatment was 5.64, 8.61, and 7.98 weeks in groups A, B, and C, respectively (P=0.116). The incidence of liver dysfunction, neutropenia, and skin rash was 12.5%, 20.5%, and 42.9% in groups A, B, and C, respectively (P=0.018). Neutropenia, as a severe AE, was absent in group A, but its prevalence was 7.7% in group B and 21.4% in group C (P=0.015). When comparing only groups B and C, the incidences of liver dysfunction and neutropenia were higher in group C (P=0.04 and P=0.021, respectively).Conclusion: The mean time to the normalization of fT4 levels did not differ among the 3 groups, but the incidence of AEs was higher in the groups that received high MMI doses. High doses of MMI (>0.7 mg/kg/day) should be reconsidered as an initial treatment for children and adolescents with GD.

scholarly journals The Relationship Between ACGME Duty Hour Requirements and Performance on the American Board of Emergency Medicine Qualifying Examination

2016 ◽  
Vol 8 (4) ◽  
pp. 558-562 ◽  
Author(s):  
Francis L. Counselman ◽  
Terry Kowalenko ◽  
Catherine A. Marco ◽  
Kevin B. Joldersma ◽  
Robert C. Korte ◽  
...  
Keyword(s):  
Emergency Medicine ◽  
Medical Education ◽  
Graduate Medical Education ◽  
Study Groups ◽  
Pass Rate ◽  
Pass Rates ◽  
Group A ◽  
The Mean ◽  
And Performance ◽  
The Relationship

ABSTRACT Background  In 2003, the Accreditation Council for Graduate Medical Education (ACGME) instituted requirements that limited the number of hours residents could spend on duty, and in 2011, it revised these requirements. Objective  This study explored whether the implementation of the 2003 and 2011 duty hour limits was associated with a change in emergency medicine residents' performance on the American Board of Emergency Medicine (ABEM) Qualifying Examination (QE). Methods  Beginning with the 1999 QE and ending with the 2014 QE, candidates for whom all training occurred without duty hour requirements (Group A), candidates under the first set of duty hour requirements (Group C), and candidates under the second set of duty hour requirements (Group E) were compared. Comparisons included mean scores and pass rates. Results  In Group A, 5690 candidates completed the examination, with a mean score of 82.8 and a 90.2% pass rate. In Group C, 8333 candidates had a mean score of 82.4 and a 90.5% pass rate. In Group E, there were 1269 candidates, with a mean score of 82.5 and an 89.4% pass rate. There was a small but statistically significant decrease in the mean scores (0.04, P &lt; .001) after implementation of the first duty hour requirements, but this difference did not occur after implementation of the 2011 standards. There was no difference among pass rates for any of the study groups (χ2 = 1.68, P = .43). Conclusions  We did not identify an association between the 2003 and 2011 ACGME duty hour requirements and performance of test takers on the ABEM QE.

Lumbar Canal Stenosis: A Prospective Clinicoradiologic Analysis

2020 ◽  
Vol 81 (05) ◽  
pp. 387-391
Author(s):  
Nikhil Jain ◽  
Shankar Acharya ◽  
Nitin Maruti Adsul ◽  
Mukesh Kumar Haritwal ◽  
Manoj Kumar ◽  
...  
Keyword(s):  
Back Pain ◽  
Spinal Canal ◽  
Neurogenic Claudication ◽  
Canal Stenosis ◽  
Group A ◽  
The Mean ◽  
The Difference ◽  
Group B ◽  
Relationship Of ◽  
The Relationship

Abstract Background Although spinal canal narrowing is thought to be the defining feature for the clinical diagnosis of lumbar canal stenosis, the degree of spinal canal stenosis necessary to elicit neurologic symptoms is not clear. Several studies have been performed to detect an association between a narrow spinal canal and clinical symptoms. Through our prospective study, we compared the radiologic criteria with the clinical criteria using the Oswestry Disability Index (ODI) and assessed how they correlate. Materials and Methods We used the qualitative grading (morphological classification system on magnetic resonance imaging [MRI]) system, dural sac cross-sectional area (DSCA), and sedimentation sign on MRI images and compared them with the Self-Paced Walking Ability (Self-Paced Walking Test) and ODI of the patients in the study. The systems were applied to 85 patients divided into three groups: group A: 43 patients with neurogenic claudication and able to walk < 30 minutes; group B: 11 patients with neurogenic claudication and able to walk > 30 minutes; and group C: 31 patients with simple back pain and no signs of neurologic claudication. Results The mean ODI was 21.19 in group C, 46.50 in group B, and 61.95 in group A. The difference was statistically significant. The mean DSCA was 164.42 mm2 in group C, 49.94 mm2 in group B, and 35.07 mm2 in group A. The difference was statistically significant. The sedimentation sign was negative in 96.8% patients in group C, 54.5% patients in group B, and 32.6% patients in group A. The difference was statistically significant. Group C had 9.3% patients in morphology grade A3, 51.6% in grade A2, and 38.7% patients in grade A1. Group B had 63.6% patients in grade C, 18.2% patients in grade B, 9.1% in grade A4, and 9.1% in grade A3. Group A had 18.6% patients in grade D, 39.5% in grade C, 27.9% in grade B, 11.6% in grade A4, and 2.3% in grade A3. The mean DSCA of group C was significantly different from group A and group B, but the difference of the mean DSCA between group A and group B was not statistically significant. The relationship of ODI to DSCA, ODI to sedimentation sign, and ODI to morphological grading for group C and group A was not statistically significant. The relationship of morphological grading to DSCA was statistically significant for all three groups. Conclusion DSCA, morphological grading, and sedimentation sign are good to excellent radiologic indicators differentiating patients with simple back pain from those with lumbar spinal stenosis. Clinically, ODI is an excellent indicator of the severity of stenosis. But ODI statistically has no significant correlation to any of these radiologic parameters.

scholarly journals Serum Ferritin as a Risk Factor for Myocardial Infarction

1970 ◽  
Vol 16 (1) ◽  
pp. 5-7
Author(s):  
MS Hafiz ◽  
MI Arslan ◽  
S Banarjee ◽  
M Obaidullah
Keyword(s):  
Risk Factors ◽  
Myocardial Infarction ◽  
Serum Ferritin ◽  
Ferritin Level ◽  
Premature Death ◽  
High Serum ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
The Relationship

Myocardial Infarction (Ml) is the most common form of heart disease and the single mostimportant cause of premature death in the developed and developing world. Unfortunately theincidence of the condition is increasing rapidly in many developing countries like Bangladesh.Effort should therefore be taken to minimize the risk factors of Ml. There are several studieswhich evaluate the relation of serum ferritin with Ml in abroad. In Bangladesh, there is no suchstudy was carried out to evaluate the relationship between serum ferritin and Ml. So the presentwork has been designed to evaluate the association of serum ferritin with Ml.The present study was carried out in the Department of Biochemistry, BSMMU in collaborationwith Department of Cardiology, BSMMU and NICVD, Dhaka during the period of July 2001 toDecember 2002. A total of 50 subjects were selected, Group A ( 20 subjects of Ml) and Group B(30 subjects of Control). The mean level of serum ferritin in control subjects were 111.65 ±50.47 ng/ml and in test subjects were 258.44 ± 87.87 ng/ml. So the present study showed thatserum ferritin level is significantly higher in patients with Ml. From the present study, it isdifficult to draw any definite conclusion but suggested that high serum ferritin concentrationmay be a cause of the incidence of Ml.doi: 10.3329/taj.v16i1.3893TAJ June 2003; Vol.16(1): 5-7

The relationship between the rate of heat production and the level of milk production in a subtropical climate

1963 ◽  
Vol 14 (6) ◽  
pp. 874 ◽  
Author(s):  
A Berman ◽  
S Amir ◽  
R Volcani
Keyword(s):  
Heat Production ◽  
Feed Intake ◽  
Open Circuit ◽  
Subtropical Climate ◽  
Air Temperatures ◽  
Hourly Rate ◽  
Heat Increment ◽  
Heat Requirements ◽  
Ad Libitum ◽  
The Relationship

Heat production as determined by the open circuit mask method, thermoregulatory responses, fat-corrected milk (F.C.M.) yield, and feed intake were recorded in two groups of 11 Israeli-Holstein cows each from the seventh day after calving up to 104 days of lactation. One group was fed according to the Fredricksen standard and the other group ad libitum, its feed intake being 125% of the Fredricksen standard. The experiment was carried out from January to mid July. No apparent heat increment of lactation was observed in the group fed according to the Fredricksen standard. A highly significant heat increment was found (10.3 kcal/hr/kg F.C.M.) at lower air temperatures (16–22°C) in the group fed ad libitum, while at higher air temperatures (23–28°C) a smaller, non-significant heat increment (5.4 kcal/hr/kg F.C.M.) was found. The hourly rate of heat production, the rectal temperature, respiration rate, respiratory volume, and respiratory vaporization changed only by small non-significant amounts with increasing temperatures. From these data it is inferred that heat production did not increase above heat requirements, except for the group fed ad libitum during the period at lower temperatures. This is explained by an increase in the critical temperature of the animals through a gradual adaptation to the summer conditions. This adaptation involves a decreased peripheral insulation by the summer coat and a lower basal metabolic rate. It is , suggested that these adaptational processes occurring in nature should be considered in studies on heat increments of feeding and of lactation.

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