Variation in cephalic volatile substances in relation to worker age and behavior in the stingless bee, scaptotrigona postica

1983 ◽  
Vol 38 (11-12) ◽  
pp. 1066-1068 ◽  
Author(s):  
W. Francke ◽  
W. Schröder ◽  
E. Engels ◽  
W. Engels
Keyword(s):  
Mass Spectroscopy ◽  
Age Groups ◽  
Stingless Bee ◽  
The Other ◽  
Volatile Substances ◽  
Individual Worker ◽  
Age Dependent ◽  
Other Substances ◽  
Scaptotrigona Postica ◽  
And Behavior

Head extracts of adult workers of the Brazilian stingless bee Scaptotrigona postica (Trigonini, Meliponinae: Apidae) were analysed for volatile substances by gas chrom atography/ mass spectroscopy. Individual worker bees performing clearly defined tasks and representing five age groups were collected. A total of 36 compounds was identified, 22 of which had not been previously described for a Trigona species. The major components are 2-heptanol, 2-tridecanone, 2-pentadecanone, Z-5-tetradecenylbutanoate and Z-7-hexadecenylbutanoate. 11 of the 36 compounds increase in concentration with age, but only 2 decrease. The other substances are present in more or less constant concentrations. These data are discussed assuming more complicated pheromone-m ediated interactions within an age-dependent polyethism between old workers acting inside and outside the nest than between young house bees

The Social Food-Flow Within the Colony of a Stingless Bee, Melipona Favosa (F.)

Behaviour ◽  
1985 ◽  
Vol 92 (1-2) ◽  
pp. 39-58 ◽  
Author(s):  
Cees Van De Guchte ◽  
Luc L.M. De Bruijn ◽  
Marinus J. Sommeijer
Keyword(s):  
Open System ◽  
Stingless Bees ◽  
Stingless Bee ◽  
The Other ◽  
Liquid Food ◽  
High Pollen ◽  
Pollen Content ◽  
The Social ◽  
Age Dependent ◽  
A Cell

Trophallaxis in workers of stingless bees was studied in colonies of Melipo favosa with marked individuals. In the brood area of the nest all trophallactic interactions are initiated by the soliciting bee, whereas spontaneous offerings occur particularly near the nest exit. The trophallactic network within the colony does not represent an open system that leads to even distribution. The cell-provisioning bees obtain food, mainly from other bees. Since cell-provisioning is strongly age-dependent, the trophallactic benefit changes strongly according to the age of the bees. The bees that discharge on a particular day are not involved in the pollen uptake from food pots on that day. The dischargers probably obtain trophallactically a liquid food suspension with a high pollen content, which they subsequently regurgitate into the brood cells. The dischargers also perform active food solicitations with other bees immediately after they have discharged during the progress of the provisioning of a cell. For this they often depart quickly from the cell that is being filled. We assume that their withdrawal from the cell vicinity enhances their chances to meet quickly bees that are less reluctant than the other dischargers nearby to donate food to them. This behavior sometimes enables dischargers to perform subsequent regurgitations in the same cell.

scholarly journals Assessment of Pedestrian Walking Speed Through the Religious Occasions in Iraq

2019 ◽  
Vol 26 (1) ◽  
pp. 1-13
Author(s):  
Alaa Yousef Al-Musawi ◽  
Saad Issa Sarsam
Keyword(s):  
Sample Size ◽  
Walking Speed ◽  
Age Groups ◽  
The Other ◽  
Male And Female ◽  
Other Hand ◽  
And Behavior ◽  
Standard Limit

The design of safe pedestrian facilities usually depends on the assessment of pedestrian characteristics and behavior. In this investigation, pedestrian walking speed through the religious occasion have been monitored at three locations, Al- Kadhimiya (Imam AL-Kadim), Najaf and Karbala (Imam AL-Husain) holy shrines. Video captures of the pedestrian through their walking to the two holy shrines have been prepared and analyzed for walking speed, gender, age groups, and clothing tradition. The pedestrian sample size is 468, 501, and 447 for Al- Kadhimiya, Karbala, and Najaf respectively. When the gender is taken into consideration, it can be noted that the walking speed of male and female pedestrian is (0.97, 1.68, and 1.63) and (0.82, 1.46, and 1.48) meter/second for Al- Kadhimiya, Karbala, and Najaf respectively. When the cloth tradition is considered, female pedestrian wearing Arabic style is slower than male by 9% for Karbala and Najaf and 3% for Al- Kadhimiya. On the other hand, when age groups are considered, the elder pedestrian is slower in walking by 6% regardless of the gender and location. It was recommended that the restricted walking path at Al- Kadhimiya could be improved to control the jam density of pedestrian and increase the walking speed to its standard limit.  

COVID - 19 AND THE PROBLEM OF PERSONALITY

2020 ◽  
pp. 31-35
Author(s):  
Mazaeva N.A. ◽  
Golovina A.G.
Keyword(s):  
General Population ◽  
Age Groups ◽  
Personal Transformation ◽  
Personality Changes ◽  
Age Dependent

In order to determine possible trends in the dynamics and characterological structure of personality in the General population caused by the COVID-19 pandemic, which is a long-term strong stressful effect and clinically and psychopathologically comparable to chronic personality changes after experiencing a disaster, the conditions predisposing to personal transformation, including clinical and prognostic patterns, are analyzed. The age-dependent nature of these changes is shown, and a number of features identified for different age groups are discussed.

Internet Sex discourse and porn viewing by Arab adolescents: The overt and the covert and its impact on their sexual education and behavior (Preprint)

2018 ◽  
Author(s):  
Anat Gesser-Edelsburg ◽  
Munawar Abed Elhadi
Keyword(s):  
Age Groups ◽  
Sexual Education ◽  
The Internet ◽  
Traditional Values ◽  
Sexual Discourse ◽  
Cultural Taboos ◽  
Internet Sex ◽  
And Behavior ◽  
Depth Interviews ◽  
Two Age Groups

BACKGROUND Due to the religious proscription, it was found that Arab youths acquire information and view pornography secretly. The internet exposes them to contents that contradict religious and cultural taboos. There are few studies about viewing habits of sexual contents among Arab adolescents and about the way they discuss sexuality. OBJECTIVE to characterize the barriers and difficulties that prevent sexual discourse in Arab society and enable pornography viewing, according to the perceptions of adolescents and mothers. METHODS phenomological qualitative research methods, in-depth interviews with 40 participants. 20 Arab adolescents, sampled by two age groups: 14-16 and 16-18. In addition, 20 mothers of adolescents from both sexes were interviewed. RESULTS The findings indicate that mothers “turn a blind eye” to porn viewing and sexual activity by boys, versus a sweeping prohibition and denial of such behavior by girls. The boys reported viewing porn routinely, whereas girls denied doing so, but admitted that their girlfriends watched porn. The study also found that the boys have guilt feelings during and after the viewing as a result of the clash between modernity and traditional values. CONCLUSIONS It is necessary to find a way to encourage a significant sexual discourse to prevent the violent consequences of its absence in Arab society. A controlled, transparent and critical sexual discourse could help youth make more informed decisions concerning the search for sexual contents, porn viewing and sexual behavior.

Introduction

2017 ◽  
Author(s):  
Patrick Colm Hogan
Keyword(s):  
Queer Theory ◽  
Social Constructionism ◽  
The Other ◽  
Sexual Identities ◽  
The Third ◽  
Sexuality And Gender ◽  
And Gender ◽  
Sexual Part ◽  
The One ◽  
And Behavior

The introduction first sets out some preliminary definitions of sex, sexuality, and gender. It then turns from the sexual part of Sexual Identities to the identity part. A great deal of confusion results from failing to distinguish between identity in the sense of a category with which one identifies (categorial identity) and identity in the sense of a set of patterns that characterize one’s cognition, emotion, and behavior (practical identity). The second section gives a brief summary of this difference. The third and fourth sections sketch the relation of the book to social constructionism and queer theory, on the one hand, and evolutionary-cognitive approaches to sex, sexuality, and gender, on the other. The fifth section outlines the value of literature in not only illustrating, but advancing a research program in sex, sexuality, and gender identity. Finally, the introduction provides an overview of the chapters in this volume.

scholarly journals Fears for the future among Finnish adolescents in 2019

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
P Lindfors ◽  
L Lahti ◽  
J Kinnunen ◽  
A Rimpelä
Keyword(s):  
Climate Change ◽  
Age Groups ◽  
Nationwide Survey ◽  
Working Life ◽  
Political Values ◽  
Global Issues ◽  
Age Related ◽  
The Future ◽  
And Behavior ◽  
Images Of The Future

Abstract Background Adolescents' images of the future emerge from knowledge built on experiences of the past and present and their age-related developmental tasks. Images of the future direct adolescents' decision-making, choices, and behavior. The images of the future can act as a mirror of our times, reflecting the political values and ethos of society. The aim of this study was to examine the fears for the future among Finnish adolescents in the era of climate change. Methods Data from a nationwide survey on the health and health behavior of 12-, 14-, 16-, and 18-year-olds (n = 3520, the response rate 37 %) in 2019 in Finland. An open-ended question on fears for the future was employed as a final question on the survey. The data was analyzed first by inductive content analysis and then by statistical methods. Altogether 7829 fears were reported. These were constructed into 12 main categories. Results Fears for the social relationships and loneliness were the most common (35 %). Fears related to death (33 %), physical health and wellbeing (25 %), life management and success (19 %) and working life (17 %) were next common. Only 9 % of the adolescents reported climate and the environment related fears. In age group comparisons, 12-14-year-olds reported more global and social fears, while 16-18-year-olds reported more personal fears, such as study, working life and relationships. The most common fears among boys and girls were similar in all age groups. Conclusions The most common fears among Finnish adolescents are related to personal life and less to global issues. Against our hypothesis, climate and environmental related fears were not among the top fears, even these topics are figured prominently in media and other research has also reported high proportions of climate change related fears among adolescents. The inconsistencies might be explained by the differences in the research methodologies: whether open-ended questions or structured questions are used. Key messages Most common fears for the future are related to personal issues like relationships, health and work. Fears for climate change were not among the most common ones when open-ended questions were used.

scholarly journals Age-related patterns of volatile cephalic constituents in queens of the neotropical stingless bee Scaptotrigona postica Latr (Hymenoptera, Apidae)

Apidologie ◽  
1993 ◽  
Vol 24 (6) ◽  
pp. 539-548 ◽  
Author(s):  
E. Engels ◽  
W. Engels ◽  
G. Lübke ◽  
W. Schröder ◽  
W. Francke
Keyword(s):  
Stingless Bee ◽  
Age Related ◽  
Scaptotrigona Postica

scholarly journals 1465. Age-Dependent Interactions Among Clinical Characteristics, Viral Loads and Disease Severity in Young Children with Respiratory Syncytial Virus Infection (RSV) Infection

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S734-S735
Author(s):  
Helena Brenes-Chacon ◽  
Cristina Garcia-Maurino ◽  
Melissa Moore-Clingenpeel ◽  
Sara Mertz ◽  
Fang Ye ◽  
...  
Keyword(s):  
Young Children ◽  
Disease Severity ◽  
Age Groups ◽  
Panel Member ◽  
Signs And Symptoms ◽  
Research Support ◽  
Review Panel ◽  
Viral Loads ◽  
Age Dependent ◽  
Rsv Infection

Abstract Background Differences in clinical presentation and viral loads according to age in young children with RSV, and their correlation with disease severity are poorly defined. The aim of this study was to define age-dependent the differences in demographic, clinical factors and viral loads between children < 2 years of age with mild RSV infection evaluated as outpatients versus those hospitalized with severe RSV infection. Figure 1. Sign and Symptoms according to disease severity and age in infants with RSV infection. Most relevant signs and symptoms were stratified in outpatients (orange) vs inpatients (blue) by age in (A) < 3 months, (B) between 3 and 6 months, and (C) > 6 to 24 months of age. The Y axis represents the signs and symptoms in the two disease severity groups and the X axis the frequency of that specific symptom (%). Numbers next to bars represent the exact number of patients with that specific sign/symptom. Comparisons by Fisher exact test. Symbol (*) indicate significant 2-sided p values Figure 2. Viral load differences according to age in infants with RSV infection. The Y axis represents RSV loads in log10 copies/mL and the X axis differences in viral loads in outpatients (orange) and inpatients (blue) in the three age groups. Comparisons by Mann Whitney test. Methods Previously healthy children < 2 years old with mild (outpatients) and severe (inpatients) RSV infection were enrolled and nasopharyngeal swabs were obtained for RSV typing and quantitation by real-time PCR. Patients were stratified by age (0-< 3, 3-6, and >6-24 months) and multivariable analyses were performed to identify clinical and viral factors associated with severe disease. Results From 2014-2018 we enrolled 534 children with RSV infection: 130 outpatients and 404 inpatients. Median duration of illness was 4 days for both groups, yet viral loads were higher in outpatients than inpatient in the three age groups (Fig 1). Wheezing was more frequent in outpatients of older age (>3 months) than in inpatients (p< 0.01), while fever was more common in inpatients that outpatients (p< 0.01) and increased with age (Fig 2). Adjusted analyses confirmed that increased work of breathing and fever were consistently associated with hospitalization irrespective of age, while wheezing in infants >3 months, and higher RSV loads in children >6-24 months were independently associated with reduced disease severity. Conclusion Age had a significant impact defining the interactions among viral loads, specific clinical manifestations and disease severity in children with RSV infection. These observations highlight the importance of patient stratification when evaluating interventions against RSV. Disclosures Octavio Ramilo, MD, Bill & Melinda Gates Foundation (Grant/Research Support)Janssen (Grant/Research Support, Advisor or Review Panel member)Medimmune (Grant/Research Support)Merck (Advisor or Review Panel member)NIH/NIAID (Grant/Research Support)Pfizer (Consultant, Advisor or Review Panel member)Sanofi/Medimmune (Consultant, Advisor or Review Panel member) Asuncion Mejias, MD, PhD, MsCS, Janssen (Grant/Research Support, Advisor or Review Panel member)Merck (Advisor or Review Panel member)Roche (Advisor or Review Panel member)

scholarly journals Could age increase the strength of inverse association between ultraviolet B exposure and colorectal cancer?

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Vidya Lakshmi Purushothaman ◽  
Raphael E. Cuomo ◽  
Cedric F. Garland ◽  
Timothy K. Mackey
Keyword(s):  
Colorectal Cancer ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Age Groups ◽  
Incidence Rates ◽  
Ultraviolet B ◽  
Inverse Association ◽  
Crude Incidence ◽  
Age Dependent ◽  
Uvb Exposure

Abstract Background Vitamin D has been identified as a potential protective factor in the development of colorectal cancer (CRC). We expect to see a stronger association of ultraviolet B (UVB) exposure and CRC crude rates with increasing age since chronic vitamin D deficiency leads to sustained molecular changes that increase cancer risk. The DINOMIT (disjunction, initiation, natural selection, overgrowth, metastasis, involution, and transition) model postulates various stages of cancer development due to vitamin D deficiency and the associated latency period. The purpose of this study is to examine this age-dependent inverse relationship globally. Methods In this ecological study, a series of linear and polynomial regression tests were performed between country-specific UVB estimates adjusted for cloud cover and crude incidence rates of CRC for different age groups. Multiple linear regression was used to investigate the association between crude incidence rates of colorectal cancer and UVB estimate adjusting for urbanization, skin pigmentation, smoking, animal consumption, per capita GDP, and life expectancy. Statistical analysis was followed by geospatial visualization by producing choropleth maps. Results The inverse relationship between UVB exposure and CRC crude rates was stronger in older age groups at the country level. Quadratic curve fitting was preferred, and these models were statistically significant for all age groups. The inverse association between crude incidence rates of CRC and UVB exposure was statistically significant for age groups above 45 years, after controlling for covariates. Conclusion The age-dependent inverse association between UVB exposure and incidence of colorectal cancer exhibits a greater effect size among older age groups in global analyses. Studying the effect of chronic vitamin D deficiency on colorectal cancer etiology will help in understanding the necessity for population-wide screening programs for vitamin D deficiency, especially in regions with inadequate UVB exposure. Further studies are required to assess the need for adequate public health programs such as selective supplementation and food fortification.

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