121 research outputs found
Short history of just mentorship and support
No full textSince its foundation in 1992, the Croatian Medical Journal (CMJ)
has followed the strict standards of quality in the scientific publishing.
However, the Journal has been aware that its specific position
demands more than just following the already established rules.
From the very beginning, the Journal declared an “author-helpful
policy,” stating that “journal editors should have a major role in
training authors in science communication, especially in smaller and
developing scientific communities. Journal authors usually send scientifically
acceptable but poorly prepared articles and it is a pity to
lose valid data because of their poor presentation.” (1,2).
In brief, the editors and editorial staff of the CMJ have been well
aware that the skills of scientific reporting and publishing in our academic
community are not developed and that valuable research results
and valid data are being lost because of poor presentation. To
be perfectly honest, ten years ago this statement looked like a nice
promise, one of the many we in academic medicine learnt not to take
too seriously
[[alternative]]The effect of different loaded complex training using lower limb exercise for the EMG signal and jumping capacity
No full text[[abstract]]The effect of different loaded complex training using lower limb exercise for the EMG signal and jumping capacity
June 2005 Student: Zong-Yan Cai
Advisor: Frank Chin-Lung Fang
Abstract
The purpose of this study was to investigate different loaded complex training (combination of a pre weight training followed by plyometric training ) on the muscle activation level and its effect for subsequent plyometric performance. Twelve National Taiwan Normal University volleyball team players were participated as the subjects of this experiment. Subjects were 176.8±6.9cm in height, 68.7±5.9 in weight，20.9±1.4 years of age，and had 135.6±18kg of maximal muscular strength in half squat. After normalized warming up, subjects were asked to performe 5 bouts continuous counter movement jump (CMJ) on force platform as a baseline. Then 4 minutes later, subjects were randomly assigned and counter balanced to perform 2 procedure of high loaded complex training (85%1RM half squat 5repetion+ 5 CMJ ) and middle loaded complex training (65%1RM half squat 5repetion+ 5 CMJ ). The rest interval between different loaded complex training experiment treatments were 10 minutes, and the CMJ was performed 3 minutes later after the half squat. The EMG signal was recorded from the the rectus femoris, biceps femoris, gastrocenmius, and soleus of the Biovision EMG system. Mean vertical ground reaction force, impulse and jump height were acquired via the kistler 9287 force platform. Paired sample t-test was used to analyze the RMS EMG of the two different intensity weight training, and One way ANOVA repeated measure was used for the RMS EMG and kinetic parameters during the period of contacting with the ground from the process of 3 sets, 5 bouts continuous CMJ for statistic analyzation. The results were obtained as follows：
1. The RMS EMG of the rectus femoris is greater during the process of high intensity weight training than the middle intensity weight training (p<.05), but no significant difference was found of biceps femoris, gastrocenmius, and soleus (p>.05).
2. Except for the maximal RMS EMG of the rectus femoris during the repeated CMJ following middle loaded weight training is significantly lower than the basline, there were no significant difference for any muscle groups of the maen RMS EMG and mean vertical ground reaction force (1655±315.05 vs 1657.86 ±272.73 vs 1665.62 ± 231.28), impulse (577.31±99.74 vs 578.54 ± 109.98 vs 582.58 ± 103.47), jump height (29.83 ± 3.71 vs 30.02 ± 4.18 vs 30.82 ± 3.95) between the 3 sets 5repeated bouts CMJ (p>.05).
In conclusion, high intensity weight training recruits more motor units from the primary muscle than middle intensity weight training, but the effect of muscle activation does not last to the subsequent plyometric performance. That is to say that high intensity complex training and middle intensity complex training are neutral to the neuromuscular stimulation, fail to have any enhancement effect.
Validação da Escala Revisada de Crença no Mundo Justo com base em Ditados Populares
No full textThe development of measures that assess individual differences in the Belief in a Just World plays an important role in advancing research in this area. The intent of this article was to validate a new version of the Belief in a Just World Scale based on Popular Sayings (BJWPS), proposing that this measure may be an alternative to the original scale. For this, two studies were developed: Study 1 (N=160) aimed to presenting psychometric evidence for a new version of the BJWPS scale through an exploratory factor analysis. Study 2 (N=144) aimed to verify the goodness-of-fit of the proposed measurement model using confirmatory factor analysis. Results of the two studies indicated a single-factor structure that assesses BJW, which corroborates the theoretical frameworks of the BJW scales. Together, the results allow us to conclude that the BJWPS presented satisfactory psychometric indexes.O desenvolvimento de medidas que avaliam as diferenças individuais da crença no mundo justo desempenha um papel importante no avanço da pesquisa nesta área. O objetivo deste artigo foi validar uma nova versão da Escala Crença em um Mundo Justo baseada em Ditados Populares (CMJDP), propondo que esta medida possa ser uma alternativa à escala original. Para isso, foram desenvolvidos dois estudos: Estudo 1 (N=160) teve como objetivo apresentar evidências psicométricas para uma nova versão da escala CMJDP por meio de uma análise fatorial exploratória. O Estudo 2 (N=144) teve como objetivo verificar a adequação da proposta ao modelo de medição usando análise fatorial confirmatória. Os resultados dos dois estudos indicaram uma estrutura unifatorial que avalia a CMJ, o que corrobora os referenciais teóricos das escalas da CMJ. Juntos, os resultados permitem concluir que a CMJDP apresentou índices psicométricos satisfatórios
Editorial Interest in Conflict of Interest
No full textThis year’s first issue of the Croatian Medical Journal (CMJ)
did not feature only the new design of the journal (1) but
also an update of its Guidelines for Authors (2), made regularly
for each volume. We can only hope that our authors
did notice the changes, as editorial experience and
research evidence show that readers do not read journal
documents (3) and that journals do not keep up with the
updates in publishing requirements (4).
One of the important changes to the Guidelines for Authors
in 2009 was the more detailed explanation of possible
editorial conflict of interest. Although the previous
versions of the Guidelines always included the statement
that the CMJ follows the principles of the best publishing
practice recommended by a professional editorial organization,
we wanted to specifically address the conflict of interest
that may exist for editors, especially those from small
scientific communities.
Conflict of interest is commonly discussed in view of an
author or a group of authors of a published work. This is
the reason why journal editors ask their authors to disclose
their possible conflict of interest (5). Cases of undisclosed
financial ties between researchers and the industry has
lead to calls not only for more transparent disclosure of
possible conflict of interests in the journals, but even for
public databases to disclose financial ties of research and
industry (6).
What about editors of journals, members of their editorial
boards, or their governing bodies? Should they declare
their possible conflict of interest? Is there a way to manage
it? Let’s look at the succinct definition of conflict of interest
by the World Association of Medical Editors (WAME):
“Conflict of interest (COI) exists when there is a divergence
between an individual’s private interests (competing interests)
and his or her responsibilities to scientific and publishing
activities such that a reasonable observer might
wonder if the individual’s behavior or judgment was motivated
by considerations of his or her competing interests.
COI in a medical publishing affects everyone with a stake
in research integrity including journals, research/academic
institutions, funding agencies, the popular media, and the
public.” (7).
It is obvious that editors may have conflict of interest
which may affect what they publish in their journal. This is
particularly true for instances when they want to publish
their own research, which is often true for editors of small
scholarly journals who are usually volunteer editors and active
researchers at the same time. However, the guidelines
www.cmj.hr
Editorial Interest in Conflict of
Interest
Ana Marušić
[email protected]
Guidelines of the International Committee of Medical
Journal Editors on editorial conflict of interest (http://
www.icmje.org/#conflicts)
II.D.3. Potential Conflicts of Interest Related to Commitments
of Editors, Journal Staff, or Reviewers
Editors who make final decisions about manuscripts must
have no personal, professional, or financial involvement in
any of the issues they might judge. Other members of the
editorial staff, if they participate in editorial decisions, must
provide editors with a current description of their financial
interests (as they might relate to editorial judgments) and
recuse themselves from any decisions in which a conflict
of interest exists. Editorial staff must not use information
gained through working with manuscripts for private gain.
Editors should publish regular disclosure statements about
potential conflicts of interests related to the commitments
of journal staff.
Box 1.
Guideline on editorial conflict of interest from the World
Association of Medical Editors
Publication Ethics Policies for Medical Journals (http://
www.wame.org/resources/publication-ethics-policiesfor-
medical-journals#conflicts)
Conflict of Interest
Manuscripts authored by members of the editorial board
present a special instance of potential conflict of interest.
The review of these manuscripts must always be supervised
by a senior editor (deputy editor or higher) who will
review the decision of the assigned decision editor for objectivity
before the decision is final
Stability of phenolic compounds and antioxidant capacity of concentrated mulberry juice-enriched dried-minced pork slices during preparation and storage
No full text© 2018 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license: http://creativecommons.org/licenses/by-nc-nd/4.0/
This author accepted manuscript is made available following 12 month embargo from date of publication (February 2018) in accordance with the publisher’s archiving policyFunctional foods have been of increasing demand due to the growing consumer awareness of the relationship between diet and health. Addition of healthy ingredients to meat products is an important method for development of functional meat products. In this contribution, functional dried-minced pork slices incorporated with concentrated mulberry juice (CMJ) were developed and stability of phenolic compounds and antioxidant capacity during product preparation and storage were evaluated. The CMJ contained high amounts of total phenolics, anthocyanin and flavonoids (19.13 ± 0.64 mg GAE/g d.m., 4.91 ± 0.18 C3GE mg/g d.m. and 18.39 ± 1.21 mg CE/g d.m., respectively) and showed excellent antioxidant activities in all assays used. CMJ incorporation drastically minimized lipid and protein oxidation of dried-minced pork slices by decreasing thiobarbituric acid-reactive substances (TBARS) value and carbonyls content during processing and storage. Thermal treatment significantly destroyed the main antioxidant ingredients including anthocyanins, flavonoids, and phenolics in dried-minced pork slices with added CMJ; however, this deterioration could be effectively counteracted by using β-cyclodextrin. The redness increased but lightness decreased with CMJ added, and color of the product remained stable during storage. Therefore, CMJ rich in phenolic compounds could be used as a natural antioxidant and pigment in dried-minced pork slices with suitable protective strategy
[[alternative]]Effects of eight weeks plyometric training on jumping performance in junior basketball players
No full text[[abstract]]The purpose of the study was to investigate the effect of eight weeks plyometric
training on jumping performance in junior basketball players. Twenty male junior
basketball players were using the random distribution to divide into treatment group and
control group. Finally, 16 subjects (age 16.88+0.65 yrs; height 178.96+6.05 cm; weight
68.49+7.28 kg) finished this experiment. Each group had 8 subjects, they were tested by
the KISTLER 9290 force platform to measure their jumping performance. The test
consisted of squat jump (SJ), counter movement jump (CMJ)、five times of continuous
jump and continuing jump until fatigue. The force platform’s sampling frequency was
500 HZ. After treatment, analyzed the vertical ground reaction force and related
parameters. Multivariate ANOVA was performed with two independent variables of
group (control and treatment) and test occasion (pre- and post-training period). The
results revealed that:
(1) After the training, on the SJ jumping performance parameter (p<.05), the
significant difference between the two groups was the optimum flight height
increasing 8.44 cm, the maximal power increased 8.32W/kg and the average
power increased 4.45W/kg, which ranges increased 21.28%, 16.73% and 20.80%.
And the parameter related to the power, the significant differences between two
groups were the maximal velocity (+7.18%) and the rate of force development
(RFD) (+27.03%).
(2) After the training, on the CMJ jumping performance parameter(p<.05), the
significant difference between the two groups was the optimum flight height
increasing 6.86 cm, which is increased 11.07%. And the parameter related to the
power, the significant difference between the two groups was the velocity
increasing 5.15%(p<.05). But the treatment group did have the significant
progress from beginning to end, which included the maximal power increased
5.54 W/kg, the average power increased 2.88W/kg and the preparative time of
squat decreased 59ms(p<.05).
(3) After the training, the treatment group did have the significant progress on the
CMJ jumping performance parameter(p < .05), which included the jumping
frequency increased 2.18 times, the average jump height increased 2.07 cm, the
average power increased 2.18W/kg and the power average fatigue index decreased;
the significant difference between two groups was the average jump height
(+6.91%).
The results revealed that the combination of eight weeks plyometric training with
weight did have significant improvement on jumping performance in subjects, either on
the SJ or on the CMJ. Moreover, by way of the progress step by step loading training
model, it will have an obvious effect during eight weeks. It is a safe and efficient
training, and it also can avoid injuring players.
The effect of fatigue on ground reaction force asymmetries in jumps and hops
No full text2018 Fall.Includes bibliographical references.INTRODUCTION: Functional movement assessments (FMAs) have gained popularity for screening athletes to determine deficits in movement quality that could increase the risk for injury. Several multi-component FMAs exist, but few use demanding jump tasks for assessment. The two-legged countermovement jump (CMJ) and the single-leg hop (SLH) for distance have been common clinical FMAs to assess for levels of asymmetries in athletes due to their ease of application and similarity to sport play. Injuries occur at greater rates when athletes are fatigued, yet FMAs are often administered when they are fresh. It possible that fatigue and asymmetries interact to increase the injury risk in athletes during athletic tasks. PURPOSE: The goal of this investigation was to analyze the vertical ground reaction forces (GRFv) in the CMJ and SLH and the anterior-posterior GRF (GRFap) in the single-leg landing in young, healthy, recreationally active men and women. It was hypothesized small asymmetries would exist in pre fatigue measures and would decrease in the CMJ as a result of fatigue, but that there would be increases in asymmetry in the SLH landing. Lastly, these measures would be highly repeatable day-to-day. METHODS: Seventeen injury free and recreationally trained subjects (9 men, 8 women) (mean ± SD age: 22.3 ± 2.5 yrs; height 170 ± 9.3 cm; mass 73.4 ± 13.8 kg) performed five maximum effort CMJ pausing to reset one foot on each force platform before performing subsequent jumps. Following this subjects performed three single-leg hops from one force platform to another over a distance of 50 cm (20 in) and make a stable landing. Subjects performed a fatiguing protocol that involved five sets of eight repetitions with 90% of their predetermined eight-repetition maximum (8RM 113 ± 35 % of their body mass). Following fatigue, the subjects repeated the CMJ and SLH landing protocols. The results of the five CMJ were averaged and GRF data on each limb was divided by the total to assess asymmetries in GRFv average and maximum pre and post fatigue. The average of three SLH for each limb was averaged and divided by bodyweight to normalize asymmetries. Eight subjects were reassessed for repeatability measures. RESULTS: There was evidence of initial asymmetries in the CMJ and SLH landing. The fatigue protocol was validated by a significant reduction in jump height (p<0.001), but there were no significant changes in the relative (L-R%) levels of GRFv asymmetries for average (p=0.437) or maximum (p=0.294). Absolute changes to GRFv asymmetry (|L-R%|) are used to detect the magnitude of asymmetry change that may be lost in side-to-side averages. Absolute GRFv average (|L-R%|) and absolute GRFv maximum (|L-R%|) did not reach statistical significance (p=0.705 and p=0.983, respectively), indicating that the levels of asymmetry in the CMJ was unchanged by fatigue. Only one measure in the SLH landing reached statistical significance, absolute GRFv maximum (|L-R%|) (p=0.031). The CMJ was highly repeatable day-to-day and only two measures had acceptable repeatability in the SLH landing: GRFv maximum pre fatigue (L-R%) (⍺=0.746) and GRFv average post fatigue (⍺=0.665). CONCLUSION: These results suggest that functional asymmetries, though low, were present and remained constant with fatigue in the CMJ. Absolute GRFv maximum (|L-R%|) was the only SLH variable that supported the hypothesis. All other measures did not increase as expected. The CMJ was highly repeatable, but measures in the SLH were not. Repeatable and reliable assessments are important for detecting injury risk in athletes prior to starting a season or returning from injury. Future research is needed to determine the most valuable FMAs for detecting asymmetries and in populations that have higher rates of asymmetry
High prevalence of founder mutations of the succinate dehydrogenase genes in the Netherlands
No full textHensen EF, van Duinen N, Jansen JC, Corssmit EPM, Tops CMJ, Romijn JA, Vriends AHJT, van der Mey AGL, Cornelisse CJ, Devilee P, Bayley JP. High prevalence of founder mutations of the succinate dehydrogenase genes in the Netherlands. Mutations in four genes encoding subunits or cofactors of succinate dehydrogenase (SDH) cause hereditary paraganglioma and pheochromocytoma syndromes. Mutations in SDHB and SDHD are generally the most common, whereas mutations in SDHC and SDHAF2 are far less frequently observed. A total of 1045 DNA samples from Dutch paraganglioma and pheochromocytoma patients and their relatives were analyzed for mutations of SDHB, SDHC, SDHD or SDHAF2. Mutations in these genes were identified in 690 cases, 239 of which were index cases. The vast majority of mutation carriers had a mutation in SDHD (87.1%). The second most commonly affected gene was SDHAF2 (6.7%). Mutations in SDHB were found in only 5.9% of samples, whereas SDHC mutations were found in 0.3% of samples. Remarkably, 69.1% of all carriers of a mutation in an SDH gene in the Netherlands can be attributed to a single founder mutation in SDHD, c.274G>T and p.Asp92Tyr. Moreover, 88.8% of all SDH mutation carriers carry one of just six Dutch founder mutations in SDHB, SDHD and SDHAF2. The dominance of SDHD mutations is unique to the Netherlands, contrasting with the higher prevalence of SDHB mutations found elsewhere. In addition, we found that most SDH mutation-related paragangliomas-pheochromocytomas in the Netherlands can be explained by only six founder mutations in SDHAF2, SDHB and SDHD. The findings underline the regional differences in the SDH mutation spectrum, differences that should be taken into account in the development of effective screening protocols. The results show the crucial role that demographic factors play in the frequency of gene mutation
Lehren, wie man Wissenschaft liest und schreibt: eine Partnerschaft von Bibliothek und Zeitschrift
No full textSetting The Croatian Medical Journal (CMJ) is a general medical journal published in English. It is the only Croatian medical journal covered by the most selective bibliographic databases, eg. SCI-Expanded and Current Contents. The Central Medical Library (CML) is the most important Croatian medical library serving as central point for biomedical information. Both are affiliated to Croatia's largest and oldest medical school, the University of Zagreb's School of Medicine.The CMJ started publishing in English in 1992. Its editorial board asked CML to assist in formulating change policy and bringing best editorial practice to the local setting. When CMJ introduced an "author-helpful" policy, CML supported authors to find literature and formatting references. CMJ also co-opted the head-librarian to the editorial board. Teaching how to read and write science: a library-journal partnership Early in their work, the CMJ editorial board learned that Croatian physicians had important and interesting data but inadequate skills to present them in a scientific article. To alleviate the lack of knowledge in research methods and writing, a mandatory course in scientific methodology and communication was developed and introduced into the university curriculum. The course runs since the academic year 1995/96 focusing on (1) principles of scientific research; (2) finding medical information; (3) study design and presentation of data; (4) writing a scientific article. The course comprises three components: lectures, discussions in medium-sized groups and exercises in problem solving in small groups. Three librarians participate in the course, giving a core lecture and hands-on exercises in problem-solving using PubMed.In 2002 and 2004 CMJ and CML started two continuing courses. Planning and Writing about Research in Medicine and Finding and Appraisal Medical Information respectively. The courses are aimed at young academic physicians and general medicine practitioners. The courses have been highly rated by the Croatian Medical Chamber, which serves as licensing institution. Where to go next? CMJ and CML developed three elective courses in evidence-based medicine (The importance of finding good evidence, Planning research and Research data analysis and writing research reports ) which are to be introduced in the next academic year. Another collaborative effort - CMJ answers your clinical question - consists in developing a web service on the CMJ's web site to help Croatian physicians to transfer evidence-based medicine principles to their clinical practice. A librarian will be responsible for searching and critical appraisal of evidence-based information.Kontext Croatian Medical Journal (CMJ) ist eine allgemeine medizinische Zeitschrift in englischer Sprache. Sie wird als einzige kroatische medizinische Publikation in Literaturdatenbanken wie SCI-Expanded und Current Contents erfasst. Die Zentrale Medizinische Bibliothek (Central Medical Library - CML) ist die wichtigste Medizinbibliothek in Kroatien und Zentrum für biomedizinsche Information. CMJ und CML gehören zur größten und ältesten medizinischen Fakultät in Kroatien, der Medizinischen Fakultät der Universität Zagreb.Seit 1992 publiziert CMJ in Englisch mit Unterstützung der CML um internationale Standards der editorischen Praxis unter bestehenden lokalen Gegebenheiten anzuwenden. CMJ verfolgte dabei den Ansatz der "author-helpful policy" und CML unterstützt Autoren bei der Literaturrecherche. Die Leiterin der CML wurde in die Redaktion des CMJ kooptiert. Lernen, wie man die Wissenschaft liest und schreibt: eine Partnerschaft zwischen Bibliothek und Zeitschrift Der Redaktion des CMJ war schon lange bewusst, dass kroatische Ärzte über wichtige und interessante Daten, aber nicht über die Fertigkeiten verfügen, diese in einem wissenschaftlichen Artikel zu präsentieren. Um diesen offensichtlichen Mangel im wissenschaflichen Forschen und Publizieren zu beheben, wurde ein verpflichtender Kurs für wissenschaftliche Methodologie und Kommunikation an der Universität eingeführt. Im Mittelpunkt des 1995/96 eingerichteten Kurses stehen: 1) Grundsätze der wissenschaftlichen Forschung; 2) Medizinische Informationssuche; 3) Studiendesign und Präsentation der Daten; 4) Verfassen wissenschaftlicher Arbeiten. Der Kurs umfasst drei Bereiche: Vorlesungen, Diskussionen und Übungen zur Problemlösung in Kleingruppen. Drei Bibliothekare sind am Kurs beteiligt. Sie halten eine Vorlesung und vermitteln in Übungen den Umgang mit PubMed.2002 bzw. 2004 wurden von CMJ und CML zwei Fortsetzungskurse etabliert, nämlich Medizinische Forschung: Planen und Schreiben sowie Finden und bewerten medizinischer Information . Diese Kurse richten sich an junge Universitätsärzte sowie Allgemeinmediziner und wurden von der dafür zuständigen kroatischen Ärztekammer sehr hoch bewertet. Wie geht es weiter? CMJ und CML haben für das nächste Studienjahr drei Wahlpflichtfächer in evidence-based Medizin entwickelt (Die Bedeutung von "good evidence"; Planung von Forschungsprojekten; Datenanalyse und Forschungsbericht ). In einem weiteren gemeinsamen Projekt - CMJ antwortet auf Ihre klinischen Fragen - soll kroatischen Ärzten auf der Website des CMJ vermittelt werden, wie sie Grundsätze der evidence-based Medizin in ihre klinische Praxis übernehmen können. Ein Bibliothekar wird hier verantwortlich sein für die Suche und kritische Bewertung der evidence-based Information zur Beantwortung klinischer Fragestellungen
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