scholarly journals Between darkness and light: spring habitats provide new perspectives for modern researchers on groundwater biology

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11711
Author(s):  
Raoul Manenti ◽  
Beatrice Piazza

Springs are interfaces between groundwater and surface habitats and may play an important role in the study of subterranean animals. In this systematic evidence review and meta-analysis, we explore whether observations of stygobionts in springs are relevant and more common than observations of epigean animals in groundwater. We searched the Web of Science database for papers on groundwater fauna and spring fauna. For each paper we found, we recorded whether the paper reported the occurrence of typical stygobionts in springs, of surface animals in groundwater, or of the same taxa in both habitats. If so, we recorded how many such species were reported. We also recorded the scientific discipline of each study and the year of publication. Our search yielded 342 papers. A considerable number of these papers reported stygobionts in springs: 20% of papers dealing with groundwater fauna and 16% of papers dealing with spring fauna reported the occurrence of stygobionts in spring habitats. Both the number of papers that mentioned stygobionts in springs, and the number of stygobiont species that were documented in springs, were higher than equivalent measures for the occurrence of surface fauna underground. We also detected a positive relationship between year of publication and the number of reports of stygofauna in springs. To broaden the insights from biological research on underground environments, we suggest that springs should be considered not only as simple sampling points of stygobionts but also as core stygobiont habitats.

Author(s):  
Arshid Yousefi Avarvand ◽  
Mehrdad Halaji ◽  
Donya Zare ◽  
Meysam Hasannejad-Bibalan ◽  
Hadi Sedigh Ebrahim-Saraie

Background: Streptococcus pneumoniae is an important pathogen of children, mostly in developing countries. We aimed to investigate the prevalence of invasive S. pneumoniae among Iranian children using a systematic review and meta-analysis. Methods: A systematic search was carried out to identify papers published by Iranian authors in the Web of Science, PubMed, Scopus, and Google Scholar electronic databases from January of 2010 to December of 2017. Then, seven publications that met our inclusion criteria were selected for data extraction and analysis. Results: Totally, one study was multicenter, and six were single-center based studies. Meanwhile, all of the included studied performed among hospitalized patients. Seven studies reported the prevalence of invasive S. pneumoniae isolated from children, of these the pooled prevalence of S. pneumoniae was 2.5% (95% CI: 0.7%-9.1%). Conclusion: The overall prevalence of invasive S. pneumoniae infections among Iranian children is low (2.5%). However, further clinical studies are required to elucidate the burden of infections among Iranian children, especially in eastern regions.


2021 ◽  
Author(s):  
Vojtech Novotny ◽  
Pagi S. Toko

The Nature Index and the Web of Science databases are used to analyse the publication patterns in life sciences in Papua New Guinea, aiming to identify the ways of improving research output of the country.


2020 ◽  
Vol 1 (2) ◽  
pp. 52-57
Author(s):  
Indah Juwita Sari ◽  
R. Ahmad Zaky El Islami

This study aimed to investigate the effectiveness of scientific argumentation strategy towards various learning outcomes and educational levels five over the years in science education. This study was used systematic review and meta-analysis using R application. Selected ten articles from the Web of Science database during 2016-2020 were used in this study. The results showed that scientific reasoning is more effective for improving through scientific argumentation in the higher education level than other learning outcomes and other educational levels with an effect size 1.39 and standard error 0.2478.  So, we can conclude that there is evidence to suggest using a scientific argumentation strategy in improving scientific reasoning in higher education levels both in the teaching process and the research.


2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Ke Hu ◽  
Wei Deng ◽  
Jing Yang ◽  
Yu Wei ◽  
Chaolin Wen ◽  
...  

Abstract Background To determine whether intermittent hypoxia (IH) can reduce the infarct size (IS) after acute myocardial infarction (AMI) in rats. Methods Articles were identified in PubMed, EMBASE and the Web of Science and were included if they evaluated the effect of IH on the changes in the infarcted area after AMI in rats. Results A preliminary search identified 3633 articles and 29 data sets from 23 articles (12 in vivo, 16 in vitro). The IS decreased after AMI in IH rats both in vitro (SMD -1.46, 95% CI [− 2.37, − 0.55]; I2 = 85.6%, P = 0.000) and in vivo (SMD -1.43, 95% CI [− 2.05, − 0.82], I2 = 73.6%, P = 0.000). Sensitivity analysis indicated that IH had a strong protective effect against myocardial infarction, and the hypoxia concentration was significantly correlated with the change in IS after AMI. Conclusion IH can reduce IS after AMI in rats. This effect of IH may be related to the dose of hypoxia, and the oxygen concentration may be one of the most important influencing factors.


Cephalalgia ◽  
2016 ◽  
Vol 37 (6) ◽  
pp. 592-598 ◽  
Author(s):  
Yao-Jun Liao ◽  
Jing-Ru Jiang ◽  
San-Qing Jin

Background The COMT Val158Met polymorphism has long been regarded as a risk factor for migraine. The possible association between COMT Val158Met polymorphism and migraine has been evaluated in several studies, but the results are not consistent. Therefore, we conduct this meta-analysis to address these issues. Methods The WEB OF SCIENCE and EMBASE databases were searched for eligible studies. The odds ratio (OR) with the corresponding 95% confidence interval (CI) was calculated to estimate the strength of the association between COMT Val158Met polymorphism and migraine. Results Five studies with 979 cases and 1870 controls were ultimately included in the present meta-analysis. The overall data showed no significant association between COMT Val158Met polymorphism and migraine in the multiplicative model (OR = 0.97, 95% CI: 0.78–1.21, p = 0.805) and dominant model (OR = 1.05, 95% CI: 0.75–1.48, p = 0.773), neither in the additive model (OR = 0.97, 95% CI: 0.77–1.23, p = 0.817) nor in the recessive model (OR = 0.88, 95% CI: 0.71–1.09, p = 0.246). In subgroup analysis, both for Caucasian and Asian populations, no statistically significant associations were observed in any genetic models. Conclusions Our meta-analysis suggested that the COMT Val158Met polymorphism was not associated with migraine risk.


2020 ◽  
Vol 10 (2) ◽  
pp. 69-81
Author(s):  
María Paulina Brito Ochoa ◽  
Maria Asuncion Sacristan- Navarro ◽  
Eva Pelechano- Barahona

This paper examines the various contributions of scientific research in the field of dynamic capabilities in the field of family businesses, using a bibliometric approach during the period 2009-2019. The volume of scientific publications found in the Web of Science (WOS) database was equal to 56 articles. The application of bibliometric methods and techniques has allowed to reflect the evolution of the level of publications, active institutions, methodologies employed and main research topics discussed. Taking into account the results obtained, future lines of research are proposed that allow progress in the consolidation of the study of dynamic capacities in the field of family businesses as a scientific discipline


2018 ◽  
Vol 13 (2s) ◽  
pp. 9 ◽  
Author(s):  
Víctor Caravaca ◽  
Raquel Hernández-García ◽  
Antonio García-de-Alcaraz

<p>The aim of this paper was to analyze the trends in judo research as a combat sport through a bibliometric analysis of scientific production indexed in the Web of Science database, starting with a group of 336 articles published between 2007 and 2017. By applying the Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA-P) methodology, the study sample was reduced to 88 articles. Different types of variables were analyzed: a) institutional characteristics; b) sample-related characteristics; and c) research methods and tools. The results showed that the most productive years were 2014 and 2016, when the average number of authors was 4.56±1.79 and the average number of citations in the Web of Science was 9.25±11.9. The highest percentage of publications showed male samples, of high-performance level and under the discipline of training theory. The most commonly methodology used was the observational study with univariate statistics through instruments and observation tools. The most studied parameters were physiological and technical-tactical elements. It seems that judo as a combat sport attracts more scientific interest in its sporting and competitive side. Some suggestions are proposed to achieve a more specific analysis of the sport of judo, without contextualizing it as a combat sport.</p>


Author(s):  
Ninh The Son ◽  
Abdelsamed I. Elshamymistry

: Genus Erythrina belongs to family Fabaceae, which widely distributed in tropical and subtropical areas, and has been applied in both traditional herbal medicines, and pharmacological uses. Original research articles and publications on overview of alkaloids related to this genus are available, but a supportive systematic review account highlighted phytochemical aspects of other types of secondary metabolites is now insufficient. Utilizing data information from SCI-Finder, Google Scholar, the Web of Science, Scopus, Science Direct, PubMed, Chemical Abstracts, ACS journals, Springer, Taylor Francis, Bentham Science and IOP Science, the reliable material sources of this systematic manuscript paper were obtained from the literature published from 1980s to now. A vast amount of data showed that the non-alkaloidal secondary metabolites obtained from genus Erythrina with various classes of chemical structures. Herein, approximately five hundred constituents were isolated comprising of flavonoids, terpenoids, saponins, phytosterols, phenols, arylbenzofurans, coumarins, alcohols, ceramides, mono-sugars and fatty acid derivatives. It resembles the previously phytochemical reports on the plants of differential genus of family Fabaceae, flavonoids reached to the high amount in plants of genus Erythrina. Numerous biological researches such as anti-microbacteria, anti-cancer, anti-virus using isolated compounds from Erythrina species suggested that secondary metabolites of Erythrina plants are now becoming promising agents for drug developments.


Author(s):  
Mandeep Kaur ◽  
Manpreet Kaur

Internet is a very powerful communication device to disclose financial and non-financial information. Almost every company today maintains its website and disseminates their information voluntarily. Internet is very exciting medium to disclose information in the form of presentation. It has become most frequently used source of information. This paper tries to examine the web home page disclosure practices of top public and private Indian banks and try to find out the relationship between the disclosure score and size of bank by using the sample of 20 banks which constitute of top public and private sector banks. The results show that there is positive relationship between the disclosure score and size of bank.


2019 ◽  
Author(s):  
Hui Feng ◽  
Yinan Zhao ◽  
Mingyue Hu ◽  
Hengyu Hu ◽  
Hui Li ◽  
...  

BACKGROUND Dementia is one of the major cause of disability and dependency among the elderly worldwide, and there are general psychological distresses among caregivers in dementia, such as depression and anxiety symptoms. The physical and mental health of the caregiver is a prerequisite and a promise to help the elderly stay alive and promote health. Web-based interventions can provide for a more convenient and efficient support and education, OBJECTIVE The purpose of this study was to examine the effect of internet-based interventions on mental health outcomes of family caregivers with dementia, and exploring which components of the web-based interventions play an important role.which are likely to reduce caregivers’ negative outcomes associated with care. METHODS A comprehensive literature search was conducted on PubMed, Embase, PsycINFO, Cochrane Database and CINAHL by using relevant terms such as web-based and caregiver as keywords, covering all studies published before June 2018. Two reviewers independently reviewed all published abstracts, according to the established inclusion and exclusion criteria ,we extracted the information about participants, interventions and results, respectively, and reviewed the quality of articles on the methods of randomized trials using the approach recommended by the Cochrane Handbook for systematic review for intervention. RESULTS A total of 815 caregivers participated in 6 articles, and 4 of the studies use depression as an outcome, according to the research after different interventions based on network after the intervention, depression scores average drop of 0.23 (95%CI -0.38 to -0.07, p<0.01), 2 studies show caregivers anxiety symptoms, the average score for anxiety dropped by 0.32 points (95% CI -0.50 to -0.14, p< 0.01), but in terms of coping, pain and stress, the web-based interventions have shown a poor effect. On the whole, the addition of professional psychological support on the basis of education can improve mental health of carers. CONCLUSIONS Internet-based interventions were generally effective in reducing anxiety and depression in dementia carers, although negative results were found in some studies. But in terms of burden and stress, further research is needed.


Sign in / Sign up

Export Citation Format

Share Document