scholarly journals Maternal nutrition and reproduction of daughters in wild house mice (Mus musculus)

Reproduction ◽  
2001 ◽  
pp. 437-442 ◽  
Author(s):  
D Meikle ◽  
M Westberg
Keyword(s):  
Reproductive Success ◽  
Food Deprivation ◽  
Maternal Nutrition ◽  
House Mice ◽  
Organizational Effects ◽  
Body Weights ◽  
Wild House Mice ◽  
The Mean ◽  
And Control ◽  
The Impact

Food deprivation after weaning often has greater effects on the reproductive success of females than of males. However, if animals are deprived prenatally (that is, through food deprivation of the mother during gestation), the reproductive success of males may be more adversely affected than that of females because of a disruption in the organizational effects of testosterone in neonatal male mice. The hypotheses that daughters of female mice deprived of food during gestation would have lower reproductive success than control daughters, but that the impact of maternal food deprivation would be lower for daughters than it would be for sons, was tested. There was no difference in the proportion of daughters of food-deprived and control mothers that produced one or two litters. However, the mean number of pups weaned in the second litters by daughters of control females (5.9 +/- 0.57 SEM) was greater than the number of pups weaned by daughters of food-deprived females (4.5 +/- 0.65 SEM). There were no differences in the mean birth or weaning body weights of offspring. Therefore, maternal food deprivation in mice may have a small but significant effect on the reproductive success of daughters. However, studies of sons born to females that were subjected to the same food deprivation protocol indicate that maternal food deprivation may have a much greater effect on the reproduction of sons than on that of daughters.

scholarly journals Aspiculuris tetraptera in wild Mus musculus. Age resistance and acquired immunity.

1976 ◽  
Vol 50 (3) ◽  
pp. 197-202 ◽  
Author(s):  
M. Behnke Jerzy
Keyword(s):  
Mus Musculus ◽  
Worm Burden ◽  
Acquired Resistance ◽  
Age Groups ◽  
Acquired Immunity ◽  
House Mice ◽  
Wild House Mice ◽  
The Mean ◽  
Aspiculuris Tetraptera

AbstractWild house mice, naturally infected with Aspiculuris tetraptera were segregated according to their weight into six age groups. The prevalence of infection and the mean worm burden of these mice were studied in the different age groups. The overall prevalence of infection was high (57% or more) in all the groups except the youngest. Mice acquired larvae soon after weaning; the highest larval burdens were reached in juvenile mice and the highest mature worm burdens, a group later, in mature mice. Older mice had fewer larvae and fewer mature worms. The mature worm burdens decreased but relatively slower than the larval burdens. It is suggested that either innate or acquired resistance could account for these observations.

scholarly journals The Impact of Divergent and Convergent Tasks on Iraqi EFL Students Reading Comprehension Success

2021 ◽  
Vol 1 (1) ◽  
pp. 35-39
Author(s):  
Sabeeha Hamza Dehham ◽  
Nadia Majeed Hussein
Keyword(s):  
Reading Skills ◽  
Experimental Approach ◽  
Statistical Significance ◽  
Control Group ◽  
Efl Students ◽  
Preparatory Stage ◽  
The Mean ◽  
And Control ◽  
The Impact ◽  
Experimental Group

This research attempted to explore the effects of divergent and convergent tasks on the successful reading of EFL students at the preparatory stage. To verify the analysis, the null hypothesis was established that states "There are no differences of statistical significance at the level of (0,05) among the mean of scores of the experimental group who study according to divergent and convergent task technique and the mean of the scores of the control group who study according to the regular method".  The experimental approach is used by designing two equivalent experimental groups of 32 students studying the technique proposed, and an 8-week (2019-2020) control group of 32 students, three classes each week using the Google Classroom Platform and Telegram. The present study utilized the platform Google Classroom (GC) and Telegram as an educational platform to assist students during their course learning process. The writing skills test was administered after checking with the experts. The results show that there are statistical differences at level (0,05) between the average of the experimental and control groups' reading skills and those of the experimental group. This difference is because the experimental group uses divergent and convergent tasks.

scholarly journals The Impact of Dialogic Learning on Students’ Attention and Academic Achievement

2018 ◽  
Vol 1 (1) ◽  
pp. 47-55
Author(s):  
Ali Nouri ◽  
Fataneh Esmaeilli ◽  
Saman Seifpour ◽  
Mahmoud Talkhabi ◽  
Anahita Khorami
Keyword(s):  
Academic Achievement ◽  
Academic Performance ◽  
Control Groups ◽  
Dialogic Learning ◽  
Achievement Data ◽  
Significant Difference ◽  
The Mean ◽  
And Control ◽  
The Impact ◽  
Experimental Group

This study is a mixed method design which employed both quantitative and qualitative methods in order to investigate the impact of dialogic learning on students’ attention and academic achievement. Data were collected using several instruments, including: the Attention Network Test; academic performance tests and semi-structured interviews. Results of Analysis of Covariance (ANCOVA) indicated that there is a statistically significant difference between the mean scores of students of the experimental and control groups on the executive control in favor of the experimental group after controlling the IQ score and pre-test scores. Further, there is a statistically significant difference between the mean scores of student of the experimental and control groups on the academic achievement tests (except of mathematics) in favor of the experimental group. The qualitative data also supported the quantitative findings. Therefore, dialogic teaching has significantly greater and more positive changes on some aspects of attention and academic performance.

scholarly journals Impact of the COVID-19 Pandemic on Willingness to Adopt Healthy Dietary Habits in China

2021 ◽  
Author(s):  
Ying Xu ◽  
Zhixue Li ◽  
Weijun Yu ◽  
Ting Liu ◽  
Zheng Liu ◽  
...  
Keyword(s):  
Dietary Habits ◽  
Multivariate Regression Analysis ◽  
Subjective Perception ◽  
Nutritional Interventions ◽  
Willingness To Adopt ◽  
Willingness To Change ◽  
The Mean ◽  
Novel Coronavirus ◽  
And Control ◽  
The Impact

Abstract Background: To investigate impact of the 2019 novel coronavirus disease (COVID-19) pandemic on willingness to adopt healthy dietary habits in China. Methods: A survey was carried out, and subjective perception of impact due to COVID-19 and willingness to change dietary habits were obtained. Results: A total of 22,459 subjects were derived from China, with an average age of 27.9±7.8 years old. Of them, the mean score of willingness to adopt healthy dietary habits was 2.2 (ranges from -9 to 9). Multivariate regression analysis showed that the impact of the COVID-19 pandemic (epidemic concern, impact of psychology, impact of work or study) are associated with a higher score of willingness to adopt healthy dietary habits among female, the older, on-medical worker, and individuals married or with higher education level, normal BMI. Conclusions: There was a positive improvement to a proper diet, so the changing features of diets should be considered in nutritional interventions for maintaining health, and prevention and control COVID-19 during the pandemic period.

scholarly journals Polyandry blocks gene drive in a wild house mouse population

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Andri Manser ◽  
Barbara König ◽  
Anna K. Lindholm
Keyword(s):  
Natural Populations ◽  
Reproductive Behaviour ◽  
Mendelian Inheritance ◽  
House Mice ◽  
Gene Drive ◽  
Mouse Population ◽  
Drive Frequency ◽  
Wild House Mice ◽  
The Impact ◽  
Wild House Mouse

Abstract Gene drives are genetic elements that manipulate Mendelian inheritance ratios in their favour. Understanding the forces that explain drive frequency in natural populations is a long-standing focus of evolutionary research. Recently, the possibility to create artificial drive constructs to modify pest populations has exacerbated our need to understand how drive spreads in natural populations. Here, we study the impact of polyandry on a well-known gene drive, called t haplotype, in an intensively monitored population of wild house mice. First, we show that house mice are highly polyandrous: 47% of 682 litters were sired by more than one male. Second, we find that drive-carrying males are particularly compromised in sperm competition, resulting in reduced reproductive success. As a result, drive frequency decreased during the 4.5 year observation period. Overall, we provide the first direct evidence that the spread of a gene drive is hampered by reproductive behaviour in a natural population.

The Impact of Virtual Laboratories on Academic Achievement and Learning Motivation in the Students of Sudanese Secondary School

1970 ◽  
Vol 4 (9) ◽  
pp. 20
Author(s):  
Dr. Esam Edris Kamtor Al Hassan
Keyword(s):  
Secondary School ◽  
Learning Motivation ◽  
Control Group ◽  
Virtual Laboratories ◽  
Post Test ◽  
Group A ◽  
The Mean ◽  
And Control ◽  
The Impact ◽  
Experimental Group

This study aimed to investigate the impact of virtual laboratories (VLabs) on academic achievement and Learning Motivation in the Students of Sudanese Secondary School in the subject of chemistry. The study followed a quasi-experimental method. The population consisted of second-grade students of Almutamaar school boys in Omdurman, the study sample was selected randomly totaling 54 students were divided randomly into two groups: 27 for experimental group and 27 for control group. The study used achievement pre & post tests, and Learning Motivation scale as tools for data collection. The result showed that  there  were statistically significant differences at the level (0.05) between the mean scores of students of the experimental group (a group is taught by VLabs) and control group (a group is taught by conventional method) in the post test in favor of the experimental group, and there were statistically significant differences at the level (0.05) between the mean scores of pre and post test for the students of the experimental group in favor of the post test, and there were statistically significant differences at the level (0.05) in the Learning Motivation scale between the experimental group( taught by VLabs) and control group (taught by conventional method)  for the favor of the experimental group too.

Capturing the Financial Impact of Heparin-Induced Thrombocytopenia.

Blood ◽  
2005 ◽  
Vol 106 (11) ◽  
pp. 3127-3127 ◽  
Author(s):  
Maureen A. Smythe ◽  
John M. Koerber ◽  
Joan C. Mattson
Keyword(s):  
Control Patient ◽  
Hospital Cost ◽  
Financial Impact ◽  
Case Patient ◽  
Heparin Induced Thrombocytopenia ◽  
The Mean ◽  
Cost Calculations ◽  
The Cost ◽  
And Control ◽  
The Impact

Abstract Data evaluating the financial impact of heparin-induced thrombocytopenia (HIT) (a severe adverse drug reaction which can result in life threatening thrombosis) is lacking. The goal of this case-control study was to evaluate the financial impact of HIT. Case patients were those with a new diagnosis of HIT from April 2003 to March 2004 for whom matched controls were available. Controls for each case patient were matched for the DRG under which the hospital was reimbursed, the patient’s primary diagnosis code and their primary procedure code. Case patients required identification of >1 control for inclusion. The hospital’s financial database was queried for length of stay (LOS), total cost, and reimbursement. For each case patient, the cost and reimbursement were compared to the cost and reimbursement for each group of matched controls. In an effort to eliminate the impact of variable reimbursement, a subset of only Medicare case and control patients was also evaluated. Of 72 new HIT patients, matched controls were identified for 31. The mean LOS for the case and control patients was 22.8 and 11.6 days respectively (p=0.006). The mean hospital cost of case and control patients was $55,440 and $26,505 respectively. From reimbursement minus cost calculations, our institution lost an average of $13,429 per HIT patient compared to an average of $393 per control patient (p=0.005). The mean LOS for Medicare cases (n=21) and matched Medicare controls was 26 and 14.6 days respectively (p=0.041). The mean hospital cost of Medicare case and control patients was $58,842 and $30,210 respectively. From reimbursement minus cost calculations for the Medicare subset, our institution lost an average of $20,229 per HIT case compared to $1844 per control patient (p<0.0001). Assuming 72 new cases of HIT per year, our institution incurs a projected annual financial loss of $980,000 from HIT. The use of alternate anticoagulants, although having a higher acquisition cost, may offset this loss through HIT avoidance.

scholarly journals A Review of Maternal Nutrition during Pregnancy and Impact on the Offspring through Development: Evidence from Animal Models of Over- and Undernutrition

2020 ◽  
Vol 17 (18) ◽  
pp. 6926 ◽  
Author(s):  
John F. Odhiambo ◽  
Christopher L. Pankey ◽  
Adel B. Ghnenis ◽  
Stephen P. Ford
Keyword(s):  
Fetal Growth ◽  
Growth Rates ◽  
Maternal Nutrition ◽  
University Of Wyoming ◽  
Growth Patterns ◽  
Late Gestation ◽  
Postnatal Life ◽  
Body Weights ◽  
Obesogenic Diet ◽  
And Control

Similarities in offspring phenotype due to maternal under- or over-nutrition during gestation have been observed in studies conducted at University of Wyoming. In these studies, ewes were either nutrient-restricted (NR) from early to mid-gestation, or fed an obesogenic diet (MO) from preconception through term. Offspring necropsies occurred at mid-gestation, late-gestation, and after parturition. At mid gestation, body weights of NR fetuses were ~30% lighter than controls, whereas MO fetuses were ~30% heavier than those of controls. At birth, lambs born to NR, MO, and control ewes exhibited similar weights. This was a consequence of accelerated fetal growth rates in NR ewes, and reduced fetal growth rates in MO ewes in late gestation, when compared to their respective controls. These fetal growth patterns resulted in remarkably similar effects of increased susceptibility to obesity, cardiovascular disease, and glucose intolerance in offspring programmed mostly during fetal stages of development. These data provide evidence that maternal under- and over-nutrition similarly induce the development of the same cadre of physical and metabolic problems in postnatal life.

scholarly journals Effect of interceptive extraction of deciduous canine on palatally displaced maxillary canine: A prospective randomized controlled study

2013 ◽  
Vol 84 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Farhan Bazargani ◽  
Anders Magnuson ◽  
Bertil Lennartsson
Keyword(s):  
Contralateral Side ◽  
Controlled Study ◽  
Effective Measure ◽  
Holding Device ◽  
The Mean ◽  
The Difference ◽  
And Control ◽  
The Impact ◽  
Observation Period ◽  
Primary Canine

ABSTRACT Objective: To evaluate the effect of the extraction of deciduous canines on palatally displaced canines (PDCs), to analyze the impact of the age of the patient on this interceptive treatment, and to assess the outcome of one-sided extraction of a maxillary primary canine on the midline of the maxilla. Materials and Methods: This study included 48 PDCs in 24 consecutive patients with bilateral PDCs. The mean age of the patients at diagnosis was 11.6 years (standard deviation 1.2 years). After randomization, one deciduous canine of each patient was assigned to extraction, and the contralateral side served as control. The patients were then followed at 6-month intervals for 18 months with panoramic and intraoral occlusal radiographs. Results: The rates of successful eruption of the PDCs at extraction and control sites were 67% and 42%, respectively, at 18 months. The difference between the sites was statistically significant, and the effect was significantly more pronounced in the younger participants. A significant decrease in arch perimeter occurred at extraction sites compared to control sites during the observation period. No midline shift toward the extraction side was observed in any patient. Conclusions: The extraction of the deciduous canine is an effective measure in PDC cases, but it must be done in younger patients in combination with early diagnosis, at the age of 10–11 years. Maintenance of the perimeter of the upper arch is an important step during the observation period, and a palatal arch as a space-holding device is recommended.

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