Some factors influencing canine sperm motility

2016 ◽  
Vol 14 ◽  
pp. 69 ◽  
Author(s):  
Guilherme Rizzoto ◽  
Antonio Sergio Varela Junior ◽  
Maria Eduarda Bicca Dode ◽  
Karina Lemos Goularte ◽  
Thomaz Lucia Junior ◽  
...  

This study aimed to evaluate whether sperm motility (MOT) in dog semen is influenced by dog age, breed, or number of sperm collections. The study group consisted of four Shih Tzus and five Border Collies, aged 1–8 years. Sperm was collected from each dog once every seven days, for a total of six weeks. Sperm motility did not differ (P > 0.05) based on age and breed. Mean MOT at the first collection (67.4% ± 6.9%) was lower (P < 0.05) than that at the third, fifth, and sixth collections (86.2%; 88.9%; 89.1% ± 6.9%, respectively). Increased MOT was observed after the third collection, demonstrating a positive correlation with the number of sperm collections and sperm motility (P< 0.05). Accordingly, our results indicate that sperm processing efficiency is increased after the collection of three ejaculates.

Author(s):  
Robert E. Goodin ◽  
Kai Spiekermann

The question of leadership is connected to many central debates in democratic theory. In this chapter, the focus is on leadership in terms of beliefs, not desires. Opinion leaders’ influence undermines the Independence Assumption. The first section looks at single opinion leaders, who, if their influence is strong and their competence limited, reduce group competence, often severely. The second section considers multiple correlated opinion leaders. The effects depend on the negative or positive correlation between the opinion leaders, the number of voters following each, and the competence of leaders. Multiple uncorrelated opinion leaders are the topic of the third section. Their influence can be relatively benign if they are many and if they are reasonably competent. Finally, a great many ‘local’ opinion leaders, as envisaged by Lazarsfeld, Berelson, and Gaudet, can offset the negative epistemic impact of a few ‘big’ opinion leaders.


Author(s):  
Golikov A.V. ◽  
Epifanov S.Yu. ◽  
Reiza V.A.

Relevance. Recurrent myocardial infarction and early postinfarction angina negatively effects on the prognosis of myocardial infarction. Aim. To evaluate myocardial infarction sodium, potassium, chlorides, calcium metabolism, features in men under 60 years old with recurrent myocardial infarction and early postinfarction angina to improve prevention and outcomes. Material and methods. The study included men aged 19-60 years old with type I myocardial infarction. Patients are divided into two age-comparable groups: I - the study group, with recurrent myocardial infarction - 110 patients; II - control, without it - 555 patients. A comparative analysis of blood serum electrolyte levels, their dynamics from the first hours to the end of the third week of myocardial infarction in the selected groups were performed. Their impact on the risk of recurrent ischemia and unfavorable outcome was assessed. Results. In the study group, in the first hours of the disease, the levels of chloride were higher (103.7±5.5 and 101.7±4.7 (mmol/l); p=0.002), and total calcium at the end of the third week of myocardial infarction (2.3±0.2 mmol/l) - lower than in the control (2.46±0.16; p=0.001). With an unfavorable outcome in the study group, the sodium level was lower in the first hours of the disease (138.7±4.9 and 142.7±6.6 (mmol/l); p=0.049). Moreover, the risk of its development was associated with sodium levels ≥148.0 mmol/l (absolute risk: 100.0%; relative - 13.8; p<0.0001) and potassium levels ≥5.3 mmol/l (absolute: 71,4%; relative - 12.4; p<0.0001). The risk of developing recurrent episodes of ischemia in the examined increased at chloride levels ≥104.7 mmol/l (absolute: 28.4%; relative: 3.1; p=0.0001) and sodium ≥139.0 mmol/l (absolute: 19.5%; relative: 1.7; p=0.03) in the first hours of myocardial infarction and calcium (<2.4 mmol/l) at the end of the third week of the disease (absolute: 31.0%; relative: 4.9; p=0.003). Conclusions. The listed combinations of levels of basic electrolytes in blood serum are markers of recurrence of ischemia in myocardial infarction and poor outcome. They should be used to identify risk groups with the necessary preventive measures and for predictive modeling.


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Chenchen Liu ◽  
Puying Wei ◽  
Jun Li

Abstract Objectives To observe and compare the difference in retinal thickness using optical coherence tomography (OCT) between patients with high myopia (HM) during the third trimester of pregnancy and age-matched HM non-pregnant women. Methods A case-control study. A total of 39 eyes from 39 HM women in the third trimester (study group) and 50 eyes of 50 age-matched non-pregnant women with HM (control group) were included. All subjects underwent SD-OCT examination. The built-in software was used to measure the retinal thickness in macular region. The data from two groups were compared using independent-samples t test. Results Among the 89 subjects in this study, the mean gestational age of the study group was 35.09 ± 2.44 weeks, and the average age was 32.24 ± 3.75 years. The average age of the control group was 34.04 ± 7.19 years old. Compared with the control group, the average thickness of parafoveal area, and the average thickness of parafoveal superior, inferior, temporal quadrants of the superficial retina and the average thickness of the foveal and parafoveal of the superficial retina were significantly decreased in the study group (P < 0.05). Compared with the control group, the average thickness of all quadrants of the retina in the parafoveal area except the nasal quadrant were significantly decreased in the study group (P < 0.05). Conclusions In this observational study, the retinal thickness of patients with high myopia during the third trimester of pregnancy was thinner than that of non-pregnant women with age-matched high myopia.


1997 ◽  
Vol 17 (2) ◽  
pp. 72-78 ◽  
Author(s):  
JM Clochesy ◽  
SM Burns ◽  
ME Shekleton ◽  
SK Hanneman ◽  
AR Knebel ◽  
...  

The survey results of the VIPs membership described in this article add qualitative information to the growing body of scientific knowledge on weaning patients off ventilators. Clearly, quantitative studies exploring the efficacy of different weaning practices across the continuum must be done if we are to accurately compare practices and prescribe the "when" and "how" of weaning. To this end, the Third National Study Group is revising the proposed weaning model and model in order to further elucidate the state of the art and science of weaning.


1975 ◽  
Vol 27 (3) ◽  
pp. 363-373 ◽  
Author(s):  
Walter F. McKeever ◽  
Kathleen M. Gill ◽  
Allan D. Vandeventer

Filbey and Gazzaniga (1969) found simple dot-present or -absent reports averaged 35 ms slower for the left than for the right visual field. Other data suggests that verbal processing efficiency differences between the cerebral hemispheres, rather than transcallosal transfer time alone, must be tapped to obtain half-field differences as large as 35 ms. Three experiments were conducted. The first failed to show any half-field differences in vocal RT for dot detection; the second replicated previous reports of significant right field superiority of vocal RT to letter stimuli for right handers, and also showed a substantially smaller half-field difference for left handers; the third experiment, utilizing the fixation control procedure of the second experiment, again failed to show half-field differences for the dot detection paradigm. Differences between the Filbey and Gazzaniga and present results probably reflect important procedural differences. We conclude that transcallosal transfer time for simple dot information is much smaller than assumed by Filbey and Gazzaniga and that the letter report-time task taps hemispheric asymmetries of verbal processing efficiency.


1986 ◽  
Vol 45 (6) ◽  
pp. 847-853 ◽  
Author(s):  
Claude Gagnon ◽  
Eve de Lamirande ◽  
Richard J. Sherins

2017 ◽  
Vol 888 ◽  
pp. 466-470 ◽  
Author(s):  
Mohammad Khairul Azhar Abdul Razab ◽  
Siti Fatimah Abd Karim ◽  
Nur Ezati Azhar ◽  
Nur Liyana Hamzah ◽  
Nor Hakimin Abdullah ◽  
...  

Highly continuous exposure to Radon (222Rn) concentrations can affects human health and cause lung cancer. This study aims to briefly monitor 222Rn concentration at different level altitude and to investigate correlation between their environmental parameters sort of temperature, humidity and pressure in indoor space. Lecture rooms known as BK 4 in the first floor and BK 8 in the third floor at academic building Universiti Malaysia Kelantan (UMK) Jeli Campus were selected as the study areas. The total of 210 readings indoor 222Rn concentrations data have been collected for the whole study using Radon Sentinel Model 1030. Average 222Rn concentration in BK 4 and BK 8 were found to have range from 0.36 pCi/L to 0.73 pCi/L and 0.40 pCi/L to 0.93 pCi/L, respectively. 222Rn concentration is higher at BK 8 with height 14.4 meter than BK 4 with height 4.8 meter from the ground. Negative correlations were obtained between 222Rn concentrations over pressure, temperature and humidity at BK 4. Meanwhile, 222Rn concentrations over pressure and humidity at BK 8 have shown positive correlation and negative correlation with temperature.


2013 ◽  
Vol 3 (4) ◽  
pp. 187
Author(s):  
Amel Najjar ◽  
samia Said ◽  
Belgacem Benaoun ◽  
Cheher Chetoui ◽  
Mohamed Ezzaouia ◽  
...  

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 101-101 ◽  
Author(s):  
Michal Sieniawski ◽  
Thorsten Reineke ◽  
Andreas Josting ◽  
Volker Diehl ◽  
Andreas Engert

Abstract Purpose: We performed semen and hormone analysis before and after treatment to investigate the influence of disease and therapy on the fertility status of male patients with Hodgkin lymphoma (HL). Patients & Methods: Patients (pts) with first diagnosis of HL without previous chemotherapy or radiotherapy who were enrolled into trials of German Hodgkin Study Group (GHSG) between 1988 and 2003 were analyzed. 202 pts were evaluated prior to treatment and 112 pts were evaluated after treatment. Results: The median age in the pre-treatment evaluation group were 26 years and 27 years in the post-treatment evaluation group. In pre-treatment evaluation group 51% of pts were advance stage of disease, 31% in intermediate stage and 11% in early stage. In the post-treatment evaluation group 45% of pts were in intermediate stage of disease, 44% in advanced stage and 11% in early stage. Before treatment 20% (40/202) of pts had normozoospermia and 80% (162/202) had dyspermia. After treatment, 64% (72/112) of pts had azoospermia, 30% (33/112) other dyspermia and 6% (7/112), the differences are significant (p&lt;0.001). Azoospermia was observed in 67% (62/93) of pts treated with combined modality, in 90% (9/10) of those treated with chemotherapy alone and in 11% (1/9) of those treated with radiotherapy alone (p&lt;0.001). Azoospermia was more frequent after BEACOPP then after COPP/ABVD - 85% (34/40) vs. 63% (37/59) (p&lt;0.001). There was no difference between patients treated with 8 cycles of BEACOPP escalated (n=15) and those treated with 8 cycles BEACOPP baseline (n=21); with 93% and vs. 86% (p&gt;0.05). The median time of onset of spermatogenesis was 27 months. During the first year after the treatment the onset of spermatogenesis was found in 18% of pts, during the second year in 23%, during the third year in 35% and in 35% after the third year. In univariate risk factors analysis, we found exttranodal involvement, risk groups, treatment with chemotherapy and BEACOPP being significantly predictive for asevere damage of fertility, none of these factors was significant in multivariate analysis. In the contrast to the pre-treatment analysis, most of the pts (79%) showed abnormal FSH-levels (p&lt;0.001). LH and testosterone were normal in most of patients; these results were similar to pre-treatment levels (p&gt;0.005). There was the relationship between the post-therapeutic FSH level and sperm count; in the group with normal FSH levels, 23% of pts showed azoospermia and in the group with abnormal FSH level 78% of pts were azoospermic (p&lt;0.001). The correlation between sperm count and LH and testosterone level was not so pronounced. Conclusion: The majority of patients with HL were azoospermic after treatment, but recovery of spermatogenesis was observed depending on the treatment received. The FSH level appears to be helpful in diagnosis of the fertility status.


2017 ◽  
Vol 14 (1) ◽  
pp. 189-194
Author(s):  
Xiuyan Bai

Factors influencing consumer trust in C to C E-commerce were investigated through questionnaire in the Thesis and SPSS statistical software was used to conduct data analysis for questionnaire results. In data analysis, descriptive analysis, factor analysis and regression analysis were successively conducted in the Thesis and five factors influencing the trust for website and vendor by consumers were extracted in the Thesis through analysis. Finally, trust mechanism was discussed from five aspects, respectively legal restraint, market, industry supervision, the third-party certification, the third-party guarantee and trust evaluation.


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