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The development of polymeric fibers incorporated with nickel (Ni) nanoparticles (NPs) has gained broad interest due to its applications, mainly for impurities removal from oil with the aid of magnetic field. In the present study, poly(vinylidene fluoride) (PVDF) fibers containing Ni NPs were produced by solution blow spinning (SBS) technique. Scanning electron microscope (SEM) measurements showed fibers with an average diameter of 564 nm, randomly dispersed without a preferred orientation. X-ray spectrum shows peaks related to Ni showing that Ni NPs were incorporated into the fibers. The magnetic analysis of the nanocomposite shows the hysteresis loops typical of ferromagnetic behavior and ZFC-FC curves revealed the presence of superparamagnetic behaviour and an average blocking temperature of 165 K. The results achieved in this work showed that is possible to produce fibrous material, using SBS technique, with unusual magnetic properties that may be applicable in various fields, including different areas of technological industry. [ABSTRACT FROM AUTHOR]

The purpose of this present study was to compare the effect of different loading intensities on the psychophysiological response between bodybuilders and active individuals in resistance exercises for upper and lower limbs. Twelve male subjects were previously selected, of which 6 were bodybuilding athletes (B) (age = 31.17 ± 7.88 yrs old; body mass = 90,62 ± 6,41 kg; height = 171.35 ± 2.39 cm; %body fat = 10.12 ± 1.64) and 6 were active individuals (A) (age = 26.5 ± 6.5 yrs old; body mass = 84.03 ± 9.12 kg; height = 177.83 ± 6.39 cm; %body fat = 14.01 ± 5.44), for the performance on one-repetition maximum test (1RM) in the bench press and leg extension exercises. The subjects performed 2 sets of 5 reps for each of the above exercises at pre-defined relative intensities (40% and 80% of 1RM) with a 3-min interval between sets. Data from the perceptual responses were collected at the end of each set using the Borg CR100 Scale. Significant differences of RPE were found between the groups in the bench press exercise at 40% load (B = 30.17 ± 8,52; A = 40.50 ± 3,94) and 80% load (B = 75.33 ± 2.58; A = 84.83 ± 3.06) of 1RM, while in the leg extension exercise, significant differences were found between groups only in the 80% load (B = 77.50 ± 4.04; A = 83.17 ± 3.06) of 1RM. The findings indicate that no significant differences were found when comparing RPE between exercises. However, perceptual responses were different among the proposed intensities, showing that the training level interferes with the psychophysiological response to resistance training. [ABSTRACT FROM AUTHOR]

The purpose of this study was to identify the presence of formaldehyde in some fresh fish commodities and to trace formaldehyde distribution in Bandar Lampung City. The formadelhyde tests were done on the storage water of fresh fish samples. The study conducted in July to October 2013 was devided in two stages: a survey to fill out a questionnaire to a number of respondents, followed by sampling some storage water of fresh fish to be tested in the laboratory. The tests were carried out on 52 sampling points taken from the fishing boats in the fishing landing port (17 boats), fish supplier car from outside Bandar Lampung (6 cars) as well as some fish sellers in 5 traditional market in Bandar Lampung (29 sellers). By conducting a laboratory test using Formaldehyde Test Kit, there were 2 samples that were purple (positively contain formaldehyde), which were taken from 2 boats in fish landing port of Lempasing. Then the assertion test was carried out to the positive samples using chromotropic acid (SNI 01 – 2894 – 1992). The results showed that the samples positively contained formaldehyde indeed, which was characterized by a bluish purple color. Based on the survey results and tracking, there was a distortion of formaldehyde distribution in Bandar Lampung, where domestic industries (including fisherman) obtained formaldehyde illegally, either from End Users, a local manufacturer or drugstore/hospital/other health care facilities. Key word: formaldehyde, fresh fish storage water, distribution distortion.

Background: To explore at what age youth start using tobacco and/or nicotine products, which product is used first, product initiation sequences, and whether some socio-demographic characteristics are associated with substance use initiation., Methods: Data were collected from an online questionnaire disseminated through social media and professional partners, targeting youth aged 14-25 in French-speaking Switzerland in August 2022. The final sample included 1362 participants. Respondents were asked whether they had already used cigarettes, e-cigarettes, hookah, snus, or cannabis at least once in their life (yes/no) and the age of the first time was asked for each substance when the answer was positive. Additionally, participants were asked about their substance use in the past 30 days. Respondents were classified according to age at onset of each tobacco/nicotine and cannabis product, and comparisons were made based on sociodemographic variables, including gender (cisgender female/cisgender male/transgender), perceived socioeconomic status (below average/average/above average), and age., Results: Overall, in addition to those who reported no consumption, four distinct initiation profiles emerged from the classification. Cigarettes remain the most commonly used first product with an average age of 15.7 years. While cigarettes and hookah are present in all profiles, the order of first consumption varies from one profile to another, with cigarettes coming first in two profiles, hookah in one and e-cigarettes in the last. Furthermore, while the most common profile contains experimental consumption of the five products considered, some profiles do not contain cannabis, e-cigarettes and/or snus, for example. When divided by age groups, both 14-17-year-olds and 18-21-year-olds reported cigarette as their first product of initiation. Across the separate age groups (14-17, 18-21, 22-25), cigarettes consistently emerge as the primary used on average., Conclusions: Cigarettes remain the first product to be used, but the younger the respondents, the earlier they start using e-cigarettes, and very close to cigarettes. Regarding current consumption patterns, e-cigarettes are becoming increasingly prominent., Competing Interests: Declarations Ethics approval and consent to participate The protocol was validated by the Cantonal Ethics Committee (protocol #2022 − 01130). Informed consent was obtained from all the participants. Participants in this study were provided with an information sheet on the homepage of the questionnaire. This information sheet adhered to the ethical guidelines established by the ethics committee. It clearly outlined the purpose of the study, the procedures involved, and the rights of the participants. By proceeding with the questionnaire and answering the questions, participants provided their tacit consent to participate in the study. Participants were also informed that they could withdraw from the study at any time, with the option to delete their already entered responses. In Switzerland, according to the Federal Act on Research involving Human Beings (Human Research Act, HRA), young people aged 14 and over can consent to participate in research on their own if the research presents only minimal risks and burdens, which is the case for this study. Consent for publication Not applicable. Competing interests The authors declare no competing interests., (© 2024. The Author(s).)

Juncus is the largest genus of Juncaceae and was considered holocentric for a long time. Recent findings, however, indicated that 11 species from different clades of the genus have monocentric chromosomes. Thus, the Juncus centromere organization and evolution need to be reassessed. We aimed to investigate the major repetitive DNA sequences of two accessions of Juncus effusus and its centromeric structure by employing whole-genome analyses, fluorescent in situ hybridization, CENH3 immunodetection, and chromatin immunoprecipitation sequencing. We showed that the repetitive fraction of the small J. effusus genome (~270 Mbp/1C) is mainly composed of Class I and Class II transposable elements (TEs) and satellite DNAs. Three identified satellite DNA families were mainly (peri)centromeric, with two being associated with the centromeric protein CENH3, but not strictly centromeric. Two types of centromere organization were discerned in J. effusus: type 1 was characterized by a single CENH3 domain enriched with JefSAT1-155 or JefSAT2-180, whereas type 2 showed multiple CENH3 domains interrupted by other satellites, TEs or genes. Furthermore, while type 1 centromeres showed a higher degree of satellite identity along the array, type 2 centromeres had less homogenized arrays along the multiple CENH3 domains per chromosome. Although the analyses confirmed the monocentric organization of J. effusus chromosomes, our data indicate a more dynamic arrangement of J. effusus centromeres than observed for other plant species, suggesting it may constitute a transient state between mono- and holocentricity., (© 2024 The Authors. The Plant Journal published by Society for Experimental Biology and John Wiley & Sons Ltd.)

Background: Despite regular consultation between adolescents/young adults (AYA) and their physicians, they are not regularly screened for psychosocial risk behaviours. This study examines physicians' self-reported psychosocial risk behaviour screening in AYA. It aims to highlight which elements hinder or improve screening abilities., Methodology: The design was a cross-sectional quantitative survey. Data were obtained through a self-reported questionnaire sent out to primary care physicians (PCP) in Switzerland in 2018. The target population consisted of 1,824 PCP (29% response rate). Participants were asked whether they screened youths from 3 age groups [10-14 y/o, 15-20 y/o, and 21-25y/o] for the HEEADSSS items during child well visits and routine checkups. Barriers to screening included primary consultation motive prioritization, insufficient time, patient compliance, reimbursement, lack of skills related to adolescent health, lack of referral options. Data were analysed first through a bivariate analysis using Chi-square tests then through a multinomial logistic regression., Results: The majority of physicians partook in preventive screening for 3-5 psychosocial risk elements. They reported the primary consultation motive as well as a lack of available time as having a high impact on their screening habits. Physician's experience and having discussed confidentiality were related to an increase in the number of topics addressed. Confidentiality remained a significant variable throughout all analyses., Conclusion: Barriers such as lack of consultation time and prioritization issues were found by physicians to be critical but did not hinder screening habits. The main element impacting screening habits was assuring confidentiality and the second is self-efficacy., (© The Author(s) 2023. Published by Oxford University Press.)

Digital media and screens are ubiquitous in the daily lives of adolescents. The screen-addicted portrait of young people has gained public attention, and health professionals are often consulted about the impact of screen use on teenagers' physical and mental health. Scientific evidence suggests that screen use is associated with risks and benefits that need to be weighed up in a nuanced way. This paper takes a critical look at the issue of screen time and at the models for understanding a problematic screen use. These considerations underline the importance of adopting a contextual understanding of screen use in adolescence., Competing Interests: Daphné Bavelier déclare être membre fondatrice d’Akili Interactive, Boston. Les autres auteur-es n’ont déclaré aucun conflit d’intérêts en relation avec cet article.

Background: Alcohol consumption is popular among adolescents and young people and adolescent non-drinkers may be socially excluded and/or stigmatized. The aim of this qualitative study was to explore the social life of young non-drinkers (14-20 years old), to understand how they live their non-drinking and how they are perceived by their drinking peers., Methods: We conducted a qualitative research on non-consumption of alcohol in the French-speaking region of Switzerland. Our study included 63 young people divided into 12 focus groups aged 14 to 20 years., Results: Overall, young non-drinkers would be a minority in their peer groups, leading some of them to feel out of the norm. Participants reported that not drinking alcohol is generally questioned and non-drinkers are almost always asked to justify their non-consumption. Finally, non-drinkers are sometimes automatically designated as resources who have to control the drinking of others and/or are the ones who help their drinking-peers if they are drunk and need help, a status that can put them under pressure., Conclusions: It is important to normalize the non-consumption of alcohol and make non-drinkers visible by including them in school-based prevention interventions., Competing Interests: Competing interestsThe authors declare no competing interests., (© The Author(s) 2024.)

This study explores the characteristics of young female and male adults (mean age 26.3 years) reporting a low sexual desire. A 2017 Swiss national survey was carried out among young adults. Participants were divided into two groups based on their level of sexual desire: Low and High. Overall, 17.2% of females and 5.7% of males reported a low sexual desire. At the multivariate level, compared to females in the High group, females in the Low group had higher odds of being dissatisfied with their social life and with their sexual life in the past 4 weeks, having no current relationship and having accepted several times sexual intercourse without really wanting. Compared to males in the High group, males in the Low group had higher odds of reporting a non-heterosexual attraction (trend), having no current relationship and having accepted several times sexual intercourse without really wanting. The prevailing idea that young people, particularly males, always have high levels of sexual desire may not be accurate and warrants further consideration. These results show that sexual desire encompasses social aspects and underscore importance of addressing how stereotypes and social norms may influence our sexuality., Competing Interests: Competing interestsThe authors have no conflicts of interest to disclose., (© The Author(s) 2023.)

Aim: To compare the evolution of screen and Internet use by youths between 2012 and 2020 in Switzerland., Methods: Cross-sectional studies of 10th-graders (age 13-14) were performed in Switzerland in 2012 and 2020, and compared in bivariate and multivariate analyses on sociodemographic, schooling, physical activity, emotional well-being, and screen use variables., Results: We found that screen use had shifted to smartphones with 71.7 % of youths primarily using this device in 2020 compared to 23.2 % in 2012. In association with this change, young people's screen time had increased dramatically with an odds ratio (OR) of 11.90 for adolescents spending more than 4 h in front of screens in 2020 compared to 2012. No changes were found in the score on the Internet Addiction Test (IAT) to detect problematic screen use and for adolescents' emotional well-being. Furthermore, youths in 2020 engaged in less physical activity lasting 60 min daily, but the frequency of their extracurricular sport participation remained unchanged., Conclusions: Young people spend more time on screens, especially because of an increase in smartphone use in 2020. However, youths do not seem to show more problematic behaviors regarding screen use, nor has this development affected their emotional well-being. The daily and continuous use of new devices is now an integral part of young people's lives. This process seems to be part of the growth of the digital world. However, Internet and screen addiction scales should be adapted to ensure that adolescents in need of help and counseling are identified., Competing Interests: Declaration of Competing Interest Authors declare that they have no conflict of interest., (Copyright © 2023 The Authors. Published by Elsevier Masson SAS.. All rights reserved.)

Objective: One of the main concerns of parents is the amount of screen time of their teenagers, and most of them try to set rules about it. The objective of this exploratory study was to compare whether parents' rules changed during confinement and whether these changes were successful., Methods: We studied a group of parents (N = 47) of 13-year-olds in Switzerland surveyed before and during the COVID-19 pandemic., Results: Most parents (83%) indicated that screen-time rules for their teens had changed during containment, mainly to be less strict. Although only a minority of parents were successful in defining screen-time spaces or schedules for their teenagers, almost three out of four were successful when they encouraged non-screen-based activities., Conclusions: This exploratory study reveals that, during containment, parents decided to be less strict with their teens' screen-time use even though it remained their main worry. However, it also suggests that when activities non-involving screens are proposed, teens are likely to participate. These results seem to indicate that reducing screen time is not a matter of imposing restrictions but, rather, of proposing alternatives. Finally, further research is warranted to assess whether these changes in screen-time use are exceptional or here to stay., (© 2022 John Wiley & Sons Ltd.)

Background : Youth alcohol use and misuse lead to adverse outcomes. However, the literature has not always associated complete abstinence with better health. Since recent literature indicates an increased proportion of young abstainers, the aim of this paper is to review the studies investigating this upward trend and the factors associated with it, such as socio-demographics, school performance, social life, physical and mental health, and parental influence. Methods : Different databases were searched and appropriated terms were used. Given that the trend has only emerged in recent years, the review was limited to papers published since 2000. A total of 970 papers were returned and 10 were retained for the present review. Results : All papers covered by the review acknowledge the existence of a new significant trend resulting in more young people in developed countries who are choosing to abstain completely from drinking alcohol. They are in good physical and mental health and perform better at school than their drinking peers. The quality of their social life, albeit slightly more limited than that of their drinking peers, appeared to be good. Conclusion : Young alcohol abstainers represent a group situated at the beginning of a continuum of alcohol consumption, they do well and are not very different from light drinkers. Alcohol abstinence at young age does not seem to have any downsides and should therefore be generally advised. To further promote such behavior, measures to encourage parental monitoring and more generous public expenditure on health services and family benefits should be encouraged.

Purpose: Emergency contraception (EC) access was liberalised in 2002 in Switzerland by making it accessible in pharmacies without medical prescription. However, its dispensation still requires a confidential interview with a pharmacist. This qualitative study aims to explore experiences of adolescent and young adult (AYA) females who have gone to a pharmacy in order to obtain EC., Materials and Methods: Thirty interviews were conducted from April to August 2019 with females aged between 15 and 25 years old at the interview. Inclusion criteria was to have requested at least one EC in a pharmacy between 2014 and 2019. A thematic content analysis was performed to extract themes brought up by the participants., Results: Some participants reported that the most difficult moment in the process was the request at the counter. The majority of participants were escorted in a private back room but opinions were divided regarding this isolation. Experiences were sometimes negative due to lack of information and knowledge regarding the dispensation process. The interview also has also a preventive aim, but the information given during it often focussed solely on the risk of vomiting. Several participants reported having perceived or received moral judgements from pharmacists., Conclusions: Pharmacists are key resources and EC dispensation an opportunity for sexual health. This exploratory study presents several elements requiring the adaptation of practices in order to prevent them from becoming barriers for AYA to access EC. Concerns are regularly expressed by young women about privacy, embarrassment and judgement in the pharmacy context regarding contraception.

The centromere represents a single region in most eukaryotic chromosomes. However, several plant and animal lineages assemble holocentromeres along the entire chromosome length. Here, we compare genome organization and evolution as a function of centromere type by assembling chromosome-scale holocentric genomes with repeat-based holocentromeres from three beak-sedge (Rhynchospora pubera, R. breviuscula, and R. tenuis) and their closest monocentric relative, Juncus effusus. We demonstrate that transition to holocentricity affected 3D genome architecture by redefining genomic compartments, while distributing centromere function to thousands of repeat-based centromere units genome-wide. We uncover a complex genome organization in R. pubera that hides its unexpected octoploidy and describe a marked reduction in chromosome number for R. tenuis, which has only two chromosomes. We show that chromosome fusions, facilitated by repeat-based holocentromeres, promoted karyotype evolution and diploidization. Our study thus sheds light on several important aspects of genome architecture and evolution influenced by centromere organization., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2022 The Author(s). Published by Elsevier Inc. All rights reserved.)

Background: There is a gap in the literature regarding data on sexting among youth under the age of 16 whereas the problems related to this practice could affect them more because of their ongoing development. This study aims to determine the prevalence rate and characteristics of sending one's own sexually related image among middle-school teens., Methods: Data were obtained from a web-based in-school survey conducted between October 2019 and February 2020. The sample comprised 3006 (mean age 13.7; 50.2% males) 10th-grade pupils in the canton of Vaud (Switzerland). Participants were asked "Have you ever sent a sexually related/sexy image of yourself?". Analysis of variance/chi-square tests and multinomial regression analyses were used to compare the groups., Results: Overall, 93.0% reported never, 3.7% once and 3.3% several times. No gender differences were found. Sending was associated with older age, low academic performance, cyberbullying victimization and reception of unsolicited sexually related images., Conclusions: Education and health professionals should be aware that it is necessary to discuss the theme, perhaps with a more global approach including pressure, consent, exchange of nonsexual images, and so on from an early age. The context and reasons for sending remain to be explored, particularly to determine if the pressure is greater at this age., (© 2022 The Authors. Journal of School Health published by Wiley Periodicals LLC on behalf of American School Health Association.)

Understanding risky sexual behaviors among adolescents is key in efforts devoted to reducing the health burden related to sexually transmitted infections and unintended or unplanned pregnancies. The aims of this study were to understand the association between number of lifetime sexual partners and time since sexual debut (TSSD) among adolescents and to determine whether sex modified this association. Data were drawn from the 2018-2019 COMPASS-Quebec study, a cohort study conducted in secondary schools in the province of Quebec, Canada. Of 18,467 respondents aged 14 years and older, 6991 (37.9%; mean age 15.3) reported consensual sexual intercourse and answered questions on their age at sexual initiation and number of lifetime sexual partners. Multilevel Poisson regressions with robust standard errors were estimated to adjust for covariates and produce adjusted group mean differences. The adjusted mean number of lifetime sexual partners ranged from 1.5 for those who had recently begun sexual activity (< 12 months) to 4.0 for those who had been active for > 35 months, an average rise of about 0.6 per year. Females-to-males adjusted mean differences showed that males reported more sexual partners than females at all time points, but the differences were only significant at the shorter (< 12 months) and longer (> 35 months) time spans. This study highlights the importance of taking into account TSSD when using and interpreting the number of lifetime sexual partners as risky sexual behavior among adolescents. Sex did not have a significant modifying effect on the relationship between number of lifetime sexual partners and TSSD., (© 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

Background The aim of this research was to determine the prevalence and characteristics of youths having ever exchanged sex and to assess if there were differences depending on whether they had done it once or several times. We also investigated what they exchanged sex for and their relationship with the last person they did it with. Methods A cross-sectional national survey was carried out in Switzerland in 2017 among young adults. The 5175 participants (51% males, mean age 26.3years) who answered the question 'Have you ever received something or obtained an advantage in exchange for a sexual act?' were divided into three groups: Never (96.8%), Once (1.5%) and Several (1.7%). Results In the multivariate analysis, compared to the Never group, those in the Once group were significantly more likely to be males, to have a poor mental health, to be non-exclusively heterosexual and to have had 10+ lifetime sexual partners. Those in the Several group reported the same characteristics, but were also more likely to be younger at first sexual contact, to have their parents not living together, to report a lower socioeconomic status and a history of sexual abuse, and to have ever sent sexual images/videos of themselves. They were also less satisfied with their financial situation. Conclusions Results indicate that transactional sex is a reality for some youths in Switzerland, and health professionals dealing with them should include this question in their sexual anamnesis. From a public health perspective, sexual education and prevention campaigns should include this phenomenon.

Background: The transmission dynamics of SARS-CoV-2 varies depending on social distancing measures, circulating SARS-CoV-2 variants, host factors and other environmental factors. We sought to investigate the clinical and epidemiological characteristics of a SARS-CoV-2 outbreak that occurred in a highly dense population area in Colombo, Sri Lanka from April to May 2020., Methodology/principal Findings: We carried out RT-qPCR for SARS-CoV2, assessed the SARS-CoV-2 specific total and neutralizing antibodies (Nabs) in a densely packed, underserved settlement (n = 2722) after identification of the index case on 15th April 2020. 89/2722 individuals were detected as infected by RT-qPCR with a secondary attack rate among close contacts being 0.077 (95% CI 0.063-0.095). Another 30 asymptomatic individuals were found to have had COVID-19 based on the presence of SARS-CoV-2 specific antibodies. However, only 61.5% of those who were initially seropositive for SARS-CoV-2 had detectable total antibodies at 120 to 160 days, while only 40.6% had detectable Nabs. 74/89 (83.1%) of RT-qPCR positive individuals were completely asymptomatic and all 15 (16.9%) who experienced symptoms were classified as having a mild illness. 18 (20.2%) were between the ages of 61 to 80. 11/89 (12.4%) had diabetes, 8/89 (9%) had cardiovascular disease and 4 (4.5%) had asthma. Of the two viruses that were sequenced and were of the B.1 and B.4 lineages with one carrying the D614G mutation., Discussion/conclusion: Almost all infected individuals developed mild or asymptomatic illness despite the presence of comorbid illnesses. Since the majority of those who were in this underserved settlement were not infected despite circulation of the D614G variant, it would be important to further study environmental and host factors that lead to disease severity and transmission., Competing Interests: The authors have declared that no competing interests exist.

Anal intercourse (AI) among heterosexuals is an understudied and taboo subject. This 2017 Swiss national study aimed to describe the characteristics and motivations of heterosexual young adults practicing AI. Participants with any same-sex experience, same-sex attraction or non-heterosexual identity were excluded. The Federal Statistical Office provided the initial sample and potential participants were recruited through postal mail inviting them to an online survey (response rate 15.1%). The sample comprised 3892 participants (52% males; 54% of the overall sample, mean age 26.3 years). Overall, 55% of women and 56% of men had never experienced AI, 17% and 12% had done it once and 28% and 32% more than once, respectively. We found that participants engaging in AI had higher odds of practicing intercourse while intoxicated, being younger at first sexual experience, not using a condom at last intercourse and reporting a history of sexual transmitted infections. The main reason reported by both genders for engaging in their first AI was being curious followed by being in love. In conclusion, AI is a widespread practice among heterosexual young adults and health professionals should be especially attentive to it.