Sexual behaviour response, testicular development and semen quality of New Zealand white rabbit bucks as influenced by dietary chitosan.

The present study was conducted to determine the effects of dietary chitosan supplementation on sexual behaviour responses, testicular development, and semen quality traits of New Zealand White (NZW) rabbit bucks. Twenty-four 5-week-old rabbit bucks were used in this experiment. Animals were grouped into four equal experimental groups: the control group was fed only on a basal diet, whereas the other groups were fed the basal diet supplemented with three levels of chitosan at 0.2, 0.4, or 0.6 g/kg, respectively. Also, bucks that received chitosan at 0.2 and 0.4 g/kg had a significantly earlier time of sexual libido (p ≤ .05) and had significantly higher ejaculate volume and sperm concentration than other groups (p ≤ .001). Furthermore, basic and sexual behaviours were significantly improved in bucks fed chitosan at 0.2 and 0.4 g/kg compared with other groups. Therefore, it could be concluded that using chitosan at 0.2 and 0.4 g/kg enhanced sexual behaviour, improved semen quality, and reproductive efficiency in the NZW rabbit bucks.

The effect of Er, Cr:YSGG laser debonding on the bond strength of two ceramic materials to dentin.

OBJECTIVES: Evaluating the bond strength of two ceramic materials to dentin after Er,Cr:YSGG laser debonding. Would laser debonding affect the bond strength of ceramic to dentin? MATERIALS AND METHODS: Recently extracted human molars were ground to expose dentin. Forty square shaped samples were prepared from CAD/CAM ceramic blocks. Samples were divided into two groups according to the type of ceramic material; group E: Lithium disilicate and group T: Ultra-translucent Zirconia (n = 20) Each group was divided into two subgroups (n = 10) according to the laser debonding effect (subgroup B: bonded samples, subgroup R: re-bonded samples after laser debonding). Ceramic samples were bonded to dentin using dual cure self-adhesive resin cement. Laser debonding of ceramic samples of subgroups R using Er, Cr:YSGG laser, were then re-bonded again to dentin surface with same resin cement. The Shear bond strength test using Universal testing machine was done. The failure mode was analyzed. Two-way analysis of variance was used to compare the mean bond strength and re-bond strength of two materials. The significance level was set at P ≤ 0.05. RESULTS: Two-Way ANOVA showed that ceramic type had a significant effect on the re-bond strength to dentin. The predominant failure mode was adhesive. CONCLUSIONS: Laser debonding of Lithium disilicate and Ultra translucent Zirconia decreased the re-bond strength to dentin. Deterioration in re-bond strength for Lithium disilicate ceramics was more pronounced than for Ultra translucent Zirconia. Clinical Relevance Deterioration in the bond strength between ceramics & dentin after laser debonding still needs improvement to allow its clinical use.

An analysis of age-standardized suicide rates in Muslim-majority countries in 2000-2019.

BACKGROUND: This study examines the 20-year trend of suicide in 46 Muslim-majority countries throughout the world and compares their suicide rates and trends with the global average. Ecological-level associations between the proportion of the Muslim population, the age-standardized suicide rates, male-to-female suicide rate ratio, and the Human Development Index (HDI) in 2019 were examined. METHODS: Age-standardized suicide rates were extracted from the WHO Global Health Estimates database for the period between 2000 and 2019. The rates in each country were compared with the age-standardized global average during the past 20 years. The countries were further grouped according to their regions/sub-regions to calculate the regional and sub-regional weighted age-standardized suicide rates involving Muslim-majority countries. Correlation analyses were conducted between the proportion of Muslims, age-standardized suicide rate, male: female suicide rate ratio, and the HDI in all countries. Joinpoint regression was used to analyze the age-standardized suicide rates in 2000-2019. RESULTS: The 46 countries retained for analysis included an estimated 1.39 billion Muslims from a total worldwide Muslim population of 1.57 billion. Of these countries, eleven (23.9%) had an age-standardized suicide rate above the global average in 2019. In terms of regional/sub-regional suicide rates, Muslim-majority countries in the Sub-Saharan region recorded the highest weighted average age-standardized suicide rate of 10.02/100,000 population, and Southeastern Asia recorded the lowest rate (2.58/100,000 population). There were significant correlations between the Muslim population proportion and male-to-female rate ratios (r=-0.324, p=0.028), HDI index and age-standardized suicide rates (r=-0.506, p<0.001), and HDI index and male-to-female rate ratios (r=0.503, p<0.001) in 2019. Joinpoint analysis revealed that seven Muslim-majority countries (15.2%) recorded an increase in the average annual percentage change regarding age-standardized suicide rates during 2000-2019. CONCLUSIONS: Most Muslim-majority countries had lower age-standardized suicide rates than the global average, which might reflect religious belief and practice or due to Muslim laws in their judicial and social structure which may lead to underreporting. This finding needs further in-depth country and region-specific study with regard to its implication for public policy.

Universal Patterns in Color-Emotion Associations Are Further Shaped by Linguistic and Geographic Proximity.

Many of us "see red," "feel blue," or "turn green with envy." Are such color-emotion associations fundamental to our shared cognitive architecture, or are they cultural creations learned through our languages and traditions? To answer these questions, we tested emotional associations of colors in 4,598 participants from 30 nations speaking 22 native languages. Participants associated 20 emotion concepts with 12 color terms. Pattern-similarity analyses revealed universal color-emotion associations (average similarity coefficient r = .88). However, local differences were also apparent. A machine-learning algorithm revealed that nation predicted color-emotion associations above and beyond those observed universally. Similarity was greater when nations were linguistically or geographically close. This study highlights robust universal color-emotion associations, further modulated by linguistic and geographic factors. These results pose further theoretical and empirical questions about the affective properties of color and may inform practice in applied domains, such as well-being and design.

The diagnostic role of diffusional kurtosis imaging in glioma grading and differentiation of gliomas from other intra-axial brain tumours: a systematic review with critical appraisal and meta-analysis.

PURPOSE: We aim to illustrate the diagnostic performance of diffusional kurtosis imaging (DKI) in the diagnosis of gliomas. METHODS: A review protocol was developed according to the (PRISMA-P) checklist, registered in the international prospective register of systematic reviews (PROSPERO) and published. A literature search in 4 databases was performed using the keywords 'glioma' and 'diffusional kurtosis'. After applying a robust inclusion/exclusion criteria, included articles were independently evaluated according to the QUADAS-2 tool and data extraction was done. Reported sensitivities and specificities were used to construct 2 × 2 tables and paired forest plots using the Review Manager (RevMan®) software. A random-effect model was pursued using the hierarchical summary receiver operator characteristics. RESULTS: A total of 216 hits were retrieved. Considering duplicates and inclusion criteria, 23 articles were eligible for full-text reading. Ultimately, 19 studies were eligible for final inclusion. The quality assessment revealed 9 studies with low risk of bias in the 4 domains. Using a bivariate random-effect model for data synthesis, summary ROC curve showed a pooled area under the curve (AUC) of 0.92 and estimated sensitivity of 0.87 (95% CI 0.78-0.92) in high-/low-grade gliomas' differentiation. A mean difference in mean kurtosis (MK) value between HGG and LGG of 0.22 (95% CI 0.25-0.19) was illustrated (p value = 0.0014) with moderate heterogeneity (I2 = 73.8%). CONCLUSION: DKI shows good diagnostic accuracy in the differentiation of high- and low-grade gliomas further supporting its potential role in clinical practice. Further exploration of DKI in differentiating IDH status and in characterising non-glioma CNS tumours is however needed.

Death anxiety in Lebanese college students in 1998 and 2015.

The present investigation sought to explore the difference in death anxiety between two different samples of students who studied at the same university in Lebanon in 1998 and 2015. Based on the changes in the social, economic, and political conditions that took place over these 17 years, it is possible to predict the change in death anxiety during this period. The participants in the 1998 study included 228 undergraduates, whereas the 2015 sample consisted of 292 students. All participants responded to Templer's Death Anxiety Scale (DAS). Sex-related differences on the DAS were statistically significant in the 1998 group where women obtained a higher mean than the men. The t-test was significant at 0.001. Among women, the 2015 group obtained a significantly lower mean score than did their female counterparts in the 1998 group, whereas the difference between the two years in men was not significant. In sum, the hypothesis of the study was partially verified, i.e., a change in death anxiety level in some groups has happened as a result of the passage of time and other factors. In this case, death anxiety may be considered a fluid entity influenced by different environmental conditions.

Diagnostic Accuracy of Multiparametric Magnetic Resonance Imaging for Differentiation Between Parotid Neoplasms.

PURPOSE: This study was designed to evaluate the role of multiparametric magnetic resonance imaging (MRI) for differentiation of parotid gland neoplasms. METHODS: Prospective study was conducted upon 52 consecutive patients (30 men, 22 women; aged 24-78 years; mean, 51 years) with parotid tumours that underwent multiparametric MRI using combined static MRI, dynamic contrast enhanced (DCE) MRI, and diffusion-weighted imaging (DWI). The static MRI parameter, time signal intensity curves (TIC) derived from DCE-MRI, and apparent diffusion coefficient (ADC) values of parotid tumours were correlated with histopathological findings. RESULTS: Static MRI revealed a significant difference between both benign and malignant lesions in regards to margin definition (P < .001) and T2 hypointensity (P < .013), with a diagnostic accuracy 95% and 78.33% respectively. Study of the TIC type on DCE-MRI revealed statistically significant difference between benign and malignant lesions (P < .001) and diagnostic accuracy 96.55%. There was no statistically significant difference (P = .181) between the ADC values of benign and malignant lesions. ROC curve analysis revealed that by using ADC cut-off value of 1 × 10-3 mm2/s had accuracy of 84.62% respectively for differentiating Warthin from malignant tumours that could be modified to higher value (94.28%) by excluding lymphoma from malignant lesions. By using cutoff value of 1.3 × 10-3 mm2/s to differentiate pleomorphic adenoma from malignancy, ROC curve analysis had high accuracy of 97.06%. CONCLUSION: Multiparametric MRI can be used for differentiation of malignant from benign parotid tumours and characterization of some benign parotid tumours.

Suicidal Thoughts, Attempts and Motives Among University Students in 12 Muslim-Majority Countries.

There is a scarcity of research on suicidal phenomena in the Muslim world. Therefore, this study aimed at investigating the self-reported prevalence of suicidal thoughts, attempts and motives in 12 Muslim countries. A total of 8417 (54.4% women) university students were surveyed by means of a self-report questionnaire. Overall, 22% of the participants reported suicidal ideation and 8.6% reported attempting suicide. The odds of suicidal thoughts were elevated in Azerbaijan, Indonesia and Saudi Arabia, while reduced ORs were recorded in Egypt, Jordan, Lebanon and Malaysia. While odds of suicide attempts were high in Azerbaijan, Palestine and Saudi Arabia reduced odds ratios (OR) were detected in Indonesia, Iran, Jordan, Lebanon, Malaysia and Tunisia. Taking drugs and using a sharp instrument were the two most frequently used methods to attempt suicide. Only 32.7% of attempts required medical attention. Escape motives were endorsed more than social motives by participants who attempted suicide. Suicidal behaviors were more frequent in women than in men. Compered to men, fewer attempts by women required medical attention. Moreover, our results show that making suicide illegal does not reduce the frequency of suicidal behavior. Results from this comparative study show that suicidal thoughts and attempts are frequent events in young adults in countries where religious scripture explicitly prohibit suicide and the frequencies of nonfatal suicidal behavior show large variation in nations adhering to the same religion.

The Relationship Between Religiosity and Anxiety: A Meta-analysis.

Several research studies from the USA and Western industrialized countries have reported a negative association between religiosity and anxiety. However, Arabic studies using mainly Muslim samples are limited. The objective of the present study was to apply meta-analysis statistical techniques to 10 Arabic studies of this association. All of the respondents were Arab citizens, ranging in age between 14 and 43 years, and the vast majority of them were Muslims. Religiosity and anxiety were assessed with seven different scales. In all of the studies, the administration of the scales was in small group sessions and in the Arabic language. Pearson correlation coefficients were calculated between the religiosity and anxiety scale scores. All the correlations were negative. All but one were statistically significant, ranging from - 0.16 to - 0.43. The mean effect size was - 0.22, and the impact of age and gender on the correlation was not significant. This result suggests that religiosity may affect anxiety by providing buffering and coping mechanisms.

The Psychometric Parameters of the Farsi Form of the Arabic Scale of Death Anxiety.

The aim of this study was to describe the psychometric properties of the Farsi Form of the Arabic Scale of Death Anxiety (ASDA). The original scale was first translated into Farsi by language experts using the back translation procedure and then administered to a total of 252 Iranian college students and 52 psychiatric outpatients from psychiatric and psychological clinics. The one-week test-retest reliability of the Farsi version in a sample of college students was 0.78, indicating good temporal stability and corroborating the trait-like nature of scores. Cronbach's α was 0.90 for the college students and 0.92 for the psychiatric outpatients, indicating high internal consistency. Scale scores correlated 0.46 with Death Obsession Scale scores, 0.56 with Death Depression Scale scores, 0.41 with Death Anxiety Scale scores, and 0.40 with Wish to be Dead Scale scores, indicating good construct and criterion-related validity. A principal component analysis with a Varimax rotation yielded four factors in the sample of Iranian college students, indicating a lack of homogeneity in the content of the scale. Male students obtained a significant higher mean score than did females. It was concluded that the Farsi ASDA had good internal consistency, temporal stability, criterion-related validity, and a factor structure reflecting important features of death anxiety. In general, the Farsi ASDA could be recommended for use in research on death anxiety among Iranian college students and psychiatric outpatients.

Psychometric Properties of Farsi Version of the Wish to be Dead Scale.

The Wish to be Dead Scale (WDS) is a new scale to measure precursors to suicidal ideation, and the aim of the present study was to examine the psychometric characteristics of a Farsi version of the WDS. The sample was a convenience sample of 145 Iranian female undergraduates and postgraduates selected from different faculties at Iran University of Medical Sciences, Iran. Using a principal component analysis and a varimax rotation with Kaiser normalization, three factors were identified and labeled: (a) lack of purpose and usefulness in life, (b) lack of interest in living, and (c) fantasizing about being dead. The WDS had good inter-item and test-retest reliability and significant positive correlations with scores on the Kessler Psychological Distress Scale-10 and the Rosenberg Self-Esteem Scale, and negative correlations with scores on the Adult Hope Scale, the Satisfaction with Life Scale, the General Self-Efficacy Scale, the Love of Life Scale, the Life Orientation Test, and the Oxford Happiness Questionnaire. We conclude that the WDS may prove to be useful in clinical practice and research into suicide.

SELF-REPORTED RELIGIOSITY IN KUWAITI AND AMERICAN COLLEGE STUDENTS.

In previous research, Kuwaiti students obtained higher scores than American students on a religiosity scale. For the present study, the self-reported religiosity of Kuwaiti and American students was assessed using a single item. The respondents were 154 Kuwaiti students (M age = 20.8 yr., SD = 2.4) and 154 American college students (M age = 21.8 yr., SD = 5.0; 82% women in both samples). The Kuwaiti students responded in Arabic and the American students in English to the question: "What is your level of religiosity in general?" using an 11-point Likert format anchored by 0 and 10. The high score indicates high religiosity. The Kuwaiti students obtained a significantly higher mean score for religiosity than did their American counterparts (6.5 vs 4.5), indicating that religiosity is more important in the lives of the present sample of Kuwaiti students than in their American counterparts. A single-item self-rating scale may be useful in brief surveys such as epidemiological studies.

SATISFACTION WITH LIFE AMONG YOUNG ADULTS IN FOUR ARAB COUNTRIES.

This study sought to explore the sex and cultural differences in satisfaction with life between undergraduate men and women recruited from four Arab countries, i.e., Egypt, Kuwait, Lebanon, and Qatar (N = 1,322); ages ranged from 18 to 27 years. The participants responded to the Arabic version of the Satisfaction with Life Scale. Egyptian and Lebanese women obtained significantly higher mean scores on satisfaction with life than did their male counterparts, whereas there were no significant sex differences in the Kuwaiti and Qatari samples. For men, the Qatari and Kuwaiti samples obtained the high mean scores on satisfaction with life, whereas the Egyptian and Lebanese samples obtained the low mean scores. For women, the Qatari sample had the higher mean score, whereas the Egyptian sample obtained the lowest mean score. The results were explained in light of the positive association between gross domestic product and satisfaction with life.

Construction of anxiety and dimensional personality model in college students.

A sample of 402 volunteer male (n = 156) and female (n = 246) Kuwaiti undergraduates responded to the Arabic versions of the Kuwait University Anxiety Scale and the Eysenck Personality Questionnaire. The latter questionnaire has four subscales: Psychoticism, Extraversion, Neuroticism, and Lie. Women obtained a higher mean score on Kuwait University Anxiety Scale and Neuroticism than did men, while men had a higher mean score on Psychoticism than did women. Factor analysis of the intercorrelations between the five variables, separately conducted for men and women, gave rise to two orthogonal factors called Anxiety-and-Neuroticism vs Extraversion, and Psychoticism vs Lie. Stepwise regression revealed that Neuroticism was the main predictor of anxiety. It was concluded that persons with high Neuroticism scores may be more vulnerable to anxiety than those with low scores.

The associations between religiosity and the Big-Five personality traits in college students from Sudan.

Research on the association between religiosity and personality with Arab participants is rare. The aim of the present study was to explore this association using a sample (N = 623) of college students from Sudan. They responded to the Arabic Scale of Intrinsic Religiosity and the Arabic Big-Five Personality Inventory. The results indicated that men obtained a significantly higher mean score than did women for extraversion, whereas women obtained higher mean total scores for religiosity and neuroticism than did men. For both genders, religiosity was significantly and positively associated with agreeableness and conscientiousness. In college men only, religiosity was significantly correlated with extraversion. A principal components analysis of the combined sample of men and women retained two components and labeled "Positive traits" and "Neuroticism and Introversion". Predictors of religiosity were Agreeableness and Conscientiousness. The model explains 42% of the variance. It was concluded that the associations observed in the Sudanese sample reflect the general pattern observed in other international samples.

Effect of dietary chitosan supplementation on productive and physiological performance parameters of growing New Zealand white rabbits.

This study aimed to investigate the effects of dietary chitosan supplementation on the growth performance, carcass traits, and some physiological parameters of weaned New Zealand White rabbits (NZW). Sixty-four NZWs were randomly distributed into four dietary experimental groups (n = 16) and fed a basal diet ad libitum for eight weeks: under Egyptian conditions. The basal diet without chitosan served as the control group, while the other three groups were fed diets containing 0.2, 0.4 and 0.6 g chitosan/kg diet. We observed significant (P ≤ 0.05) differences among chitosan treatments. Specifically, groups supplemented with chitosan in their diets had significantly (P ≤ 0.05) higher final body weight and weight gain, as well as an improved feed conversion ratio compared to the control group. Rabbits fed chitosan at 0.2 g/kg diet performed the best in growth traits compared to other treatment groups. Rabbits fed chitosan at 0.4 g/kg diet had significantly (P ≤ 0.05) higher levels of total protein in their blood than in the control group. However, levels did not differ significantly from that in the 0.2 group. Likewise, the highest (P ≤ 0.05) levels of glucose and HDL concentrations were detected in rabbits fed chitosan at a 0.2 g/kg diet. All chitosan-supplemented groups (especially at 0.2 g/kg diet) had higher economic efficiency and relative profit levels than the control group. Moreover, morphometric evaluations of the small intestine revealed higher villi number and crypt depth values in chitosan-treated animals compared to the control group. We conclude that using chitosan at levels of 0.2 or 0.4 g/kg diet can effectively improve the body weight gain, feed conversion ratio and economic efficiency, as well as the overall health status of NZW under Egyptian conditions.

Convergent validity of the Arabic scale of mental health.

To estimate the convergent validity of the Arabic Scale of Mental Health, three convenience separate samples (ns = 162, 168, 138) of volunteer Kuwaiti college students, ages 19 to 32 years, responded anonymously to several scales measuring psychopathology. Analyses showed total ratings for the scale correlated negatively with those of the Kuwait University Anxiety Scale, Factorial Arabic Neuroticism Scale, Somatic Symptoms Inventory, Arabic Scale of Insomnia, the nine subscales of the Symptom Checklist-90-R, the Beck Depression Inventory, and the seven subscales of the General Health Questionnaire. Three separate correlation matrices were subjected to principal components analyses for which a single bipolar factor, Mental health versus psychopathology, was retained in all three matrices. Loadings for the Arabic Scale of Mental Health were -.76, -.64, and -.76. It was concluded that this scale has suitable convergent validity.

Personality and mental health: Arabic Scale of Mental Health, Eysenck Personality Questionnaire, and Neo Five Factor Inventory.

The aim of this research was to explore associations of mental health and personality factors through two studies. Two separate convenience samples of volunteer Kuwaiti college students took part in the study (n1 = 193, n2 = 128). Their ages ranged between 18 and 32 years. They responded, in small group sessions, to the Eysenck Personality Questionnaire and to Costa and McCrae's Five Personality Factors in their Arabic forms. In addition, both samples responded to the Arabic Scale of Mental Health (ASMH). In the first study, scorers on the ASMH were significantly correlated (r) with Neuroticism (-.63), Extraversion (.57), and Lie (.22) scores. Two orthogonal components were retained and labeled "Mental health and Extraversion versus Neuroticism," and "Psychoticism versus Lie." In Study 2, mental health scores were significantly positively correlated with Conscientiousness (.62), Extraversion (.59), Agreeableness (.34), and Openness (.26) scores, and negatively with Neuroticism (-.62) scores. Two orthogonal components were retained and labeled "Mental health, Agreeableness, Extraversion versus Neuroticism," and "Openness, Conscientiousness, and Mental health." It was concluded that the salient associations of the ASMH were with positive traits and scores on Extraversion, Conscientiousness (positive), and with Neuroticism (negative), indicating good construct validity of the ASMH.

Self-esteem among college students from four Arab countries.

This study had three objectives: (a) to compare undergraduates from four Arab countries on self-esteem, (b) to explore the sex-related differences in self-esteem in these four Arab countries, and (c) to examine the association of self-esteem with both per-capita income and unemployment rate. Four samples of 2,643 students were recruited from Egypt (n = 576), Kuwait (n = 674), Lebanon (n = 826), and Oman (n = 567). They responded to the Arabic version of the Rosenberg Self-Esteem Scale. Kuwaiti and Omani men had a significantly higher mean score on self-esteem than did Egyptian and Lebanese men. Egyptian women scored significantly lower than the Omani women, but the effect size was small. Regarding the sex-related differences in self-esteem, Kuwaiti men had a significantly higher mean score than did their female peers, but the effect size was small, whereas there were no significant sex differences in the other samples. The sex-related difference in self-esteem is a controversial result and it may not be replicable in different countries. It was suggested that self-esteem is associated with high per-capita income and low unemployment rate.