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2.
PLoS Genet ; 19(12): e1011050, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38060519

RESUMO

The notion that mitochondria cannot be lost was shattered with the report of an oxymonad Monocercomonoides exilis, the first eukaryote arguably without any mitochondrion. Yet, questions remain about whether this extends beyond the single species and how this transition took place. The Oxymonadida is a group of gut endobionts taxonomically housed in the Preaxostyla which also contains free-living flagellates of the genera Trimastix and Paratrimastix. The latter two taxa harbour conspicuous mitochondrion-related organelles (MROs). Here we report high-quality genome and transcriptome assemblies of two Preaxostyla representatives, the free-living Paratrimastix pyriformis and the oxymonad Blattamonas nauphoetae. We performed thorough comparisons among all available genomic and transcriptomic data of Preaxostyla to further decipher the evolutionary changes towards amitochondriality, endobiosis, and unstacked Golgi. Our results provide insights into the metabolic and endomembrane evolution, but most strikingly the data confirm the complete loss of mitochondria for all three oxymonad species investigated (M. exilis, B. nauphoetae, and Streblomastix strix), suggesting the amitochondriate status is common to a large part if not the whole group of Oxymonadida. This observation moves this unique loss to 100 MYA when oxymonad lineage diversified.


Assuntos
Eucariotos , Oximonadídeos , Filogenia , Eucariotos/genética , Oximonadídeos/genética , Oximonadídeos/metabolismo , Mitocôndrias/genética , Genômica
3.
Front Psychol ; 14: 1232637, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37705950

RESUMO

We will consider four answers to the question about whether the concept of personality is capacious enough to incorporate virtues. The simplest is that the concept of personality encompasses all individual variations in persons. It follows from this answer that virtues would, as individual differences, be incorporated into personality. Unfortunately, definitions of personality do not always invoke such capaciousness, and, in practice, most scholars limit their work to the Big Five or HEXACO models, which do not incorporate virtues. The second answer is that the concept of personality incorporates all trait or dimension level variations across persons, with some exceptions, such as intelligence, attachment style, and psychopathy. Following this definition, virtues, as traits, would be incorporated into such a broad definition of personality. Unfortunately, the boundaries for inclusion and exclusion into personality are fuzzy in this case, and there is no extant definition of personality that solves this problem. The third answer is that personality traits and virtue traits are similar, but distinct concepts. This article presents conceptual and empirical arguments for this similarity in seeing traits as a higher order concept that includes the species of personality and the species of virtue. The fourth answer is that personality and virtue are unrelated. This answer is dismissed because there are many studies that indicate that they are correlated, and few advocate such a clear differentiation. The conclusion is that, pending conceptual and empirical results indicating otherwise, the genus-species relationship seems most fitting where traits are a genus, and personality and virtue are each a species within that genus.

4.
Front Psychol ; 14: 1204824, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37434884

RESUMO

Background: This study examined the impact of anxiety and depression symptoms during the first stage of the COVID-19 pandemic on the behavioral, cognitive, and emotional changes of the Czech population. Methods: The research sample (n = 2363; 48.83 ± 16.53 years; 50.15% men) was obtained using an online survey. Depression and anxiety symptoms were measured using the Overall Depression Severity and Impairment Scale (ODSIS) and the Overall Anxiety Severity and Impairment Scale (OASIS) and associations were adjusted for age, gender, and economic status. Results: The results showed that increased symptoms of anxiety and depression were significantly linked to feelings of loneliness, helplessness, reduced quality of relationship with a partner, higher probabilities of alcohol abuse, food consumption, and contemplation of existential questions. Higher symptoms of anxiety were associated with feelings of being threatened. Higher symptoms of depression symptoms increased tobacco abuse. Conclusion: During the first stage of the COVID-19 pandemic, higher symptoms of anxiety and depression among Czech citizens were associated with behavioral, cognitive, and emotional changes.

5.
Int J Public Health ; 68: 1605910, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37124161

RESUMO

[This corrects the article DOI: 10.3389/ijph.2022.1604324.].

6.
BMC Psychiatry ; 22(1): 822, 2022 12 23.
Artigo em Inglês | MEDLINE | ID: mdl-36564765

RESUMO

BACKGROUND: The Overall Anxiety Severity and Impairment Scale (OASIS) is a transdiagnostic measure that assesses severity and impairment associated with anxiety disorders. However, its psychometric properties were primarily examined in English-speaking or western countries. Therefore, this study aims to examine its psychometric parameters in the Czech Republic. METHODS: A large representative sample (n = 1738), a clinical sample (n = 57) and a retest sample (n = 20) were used. In addition to the OASIS, conventional measures of anxiety, depression, personality traits, self-esteem, life satisfaction, and other scales were also administered. Moreover, we examined the latent structure, reliability, validity, and the cut-off score for the Reliable Change Index (RCI) and the Clinically Significant Change Index (CSI). RESULTS: Higher anxiety was found in females, religious non-church members, and students. The Confirmatory Factor Analysis supported the adequate fit of the unidimensional solution: x2(4) = 3.20; p < 0.525; CFI = 1.000; TLI = 1.000;RMSEA = 0, SRMR = 0. The measurement equivalence examination indicated that the OASIS measures anxiety invariantly between males and females. The validity of the OASIS was supported by positive associations with neuroticism, depression, perceived stress, guilt, shame, and the established anxiety measures. The internal consistency was excellent (Cronbach's alpha = 0.96, McDonald's omega = 0.96). The test-retest reliability was acceptable (r = 0.66). The cut-off for the CSI is 6 and the RCI is 5.32. CONCLUSIONS: The OASIS represents a reliable and valid instrument for assessing anxiety in adults. Due to its shortness, excellent psychometric properties, and percentile norms, it is especially useful for short and accurate screening of anxiety and mapping therapeutic changes in clinical practice.


Assuntos
Ansiedade , Adulto , Masculino , Feminino , Humanos , Psicometria/métodos , Reprodutibilidade dos Testes , República Tcheca , Escalas de Graduação Psiquiátrica , Ansiedade/diagnóstico , Padrões de Referência , Inquéritos e Questionários
7.
Top Companion Anim Med ; 51: 100733, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36272536

RESUMO

Intraocular pressure (IOP), pupil size (PS), and tear production are variables important in maintaining eye homeostasis. The purpose of this study was to determine the effects of methadone on IOP, PS, and tear production measured by Schirmer I tear test (STT-I) in healthy nonpainful dogs. A prospective, randomized, "double-blind" clinical study was performed. A total of 40 healthy conscious client-owned dogs were included in the study. Dogs were allocated randomly to 1 of 3 groups and given intravenous methadone 0.3 mg/kg (Met-IV, n = 15), intramuscular methadone 0.3 mg/kg (Met-IM, n = 15), or saline 0.3 mL/kg (SAL, n = 10). IOP, PS, STT-I, heart rate (HR), and mean arterial pressure (MAP) were measured prior to (baseline) and at 2, 5, 10, 20, and 30 minutes after drug administration. Data were analyzed using 1-way and 2-way repeated measures ANOVA or their nonparametric equivalents (P < .05). No significant differences in IOP and PS within or between the groups were detected. In the Met-IV group, the STT-I decreased significantly after 30 minutes (P = .025), however, the values remained within the physiological ranges. In Met-IV group, HR decreased significantly at 5, 10, 20, and 30 minutes, respectively. No other significant differences were observed. Methadone administered at a dose of 0.3 mg/kg intravenously or intramuscularly seems to cause within 30 minutes no clinically important effect on IOP, PS, and STT-I in healthy conscious nonpainful dogs without ocular abnormalities.


Assuntos
Doenças do Cão , Oftalmopatias , Cães , Animais , Pressão Intraocular , Pupila , Metadona/farmacologia , Estudos Prospectivos , Tonometria Ocular , Oftalmopatias/veterinária
8.
Vet Anaesth Analg ; 49(6): 525-535, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36175292

RESUMO

OBJECTIVE: The aim of this systematic review is to summarize outcomes of studies focused on the effects of opioids, injectable sedative and anaesthetic drugs and inhalant anaesthetics on tear production in dogs. This manuscript complements the systematic review describing the effect of anaesthetics on intraocular pressure in dogs (Pierce-Tomlin et al. 2020). Databases used A detailed search of scientific references has been performed. PubMed, Web of Science, Science Direct and Google Scholar databases were used to search for sources using free text terms 'Dog' or 'Canine', 'Anaesthesia' or 'Anaesthetic' or 'Sedative' or 'Opioid' or the name of used opioids, sedative and anaesthetic drugs and 'Tear' or 'Schirmer' or 'Lacrimation'. The time frame searched was from 1960 to October 2021. Any published manuscripts that were concerned with sedative or anaesthetic drugs administered systemically in the dog and tear production were evaluated. CONCLUSIONS: Low doses of α2-adrenoceptor agonists, neuroleptics, benzodiazepines, opioids, propofol or alfaxalone administered alone have no clinically significant effect on aqueous tear production in healthy dogs measured by the Schirmer tear test I (STT-I). Intramuscular injection of ketamine increases STT-I values. Higher doses of α2-adrenoceptor agonists and combinations of anaesthetics, including inhaled anaesthetics, always clinically significantly decrease tear production.


Assuntos
Anestésicos , Propofol , Cães , Animais , Anestésicos/farmacologia , Lágrimas , Propofol/farmacologia , Hipnóticos e Sedativos/farmacologia , Receptores Adrenérgicos
9.
Int J Public Health ; 67: 1604324, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36090829

RESUMO

Objectives: Together with the COVID-19 pandemic, conspiracy theories have begun to spread. Evidence is lacking for religious conspiracy theories (RCT) related to COVID-19 in a non-religious environment. This study aimed to assess links between religiosity and spirituality (R/S) and RCT about COVID-19, and to examine their associations with mental health. Methods: A sample of Czech adults (n = 1,273, mean age = 47.5, SD = 16.4; 51.5% male) participated in the survey. We measured R/S, RCT, negative religious coping (NRC), feelings impairment and mental health symptoms. Results: We found R/S were significantly associated with RCT with ß 0.71 (95% confidence interval [CI] 0.59-0.82) for the strongest association. Moreover, RCT and NRC were strongly associated with paranoia, anxiety and depression. The most frequent association was found for NRC and paranoid ideation, with ß of 0.35 (95% CI 0.26-0.44). Conclusion: Our findings showed associations between religiosity/spirituality and beliefs in religious conspiracy theories about COVID-19. Moreover, these RCT and negative religious coping were linked to higher possibility of mental health problems. Understanding these associations may help prevent this negative impact and contribute to the effectiveness of psychotherapeutic help.


Assuntos
COVID-19 , Saúde Mental , Adaptação Psicológica , Adulto , Ansiedade/epidemiologia , Transtornos de Ansiedade , COVID-19/epidemiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
10.
Int J Public Health ; 67: 1604712, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35769134

RESUMO

Objectives: We investigated the associations between religiosity/spirituality and respondents' changes in their relationships, feelings, thinking, and behaviour during the first wave of the COVID-19 pandemic in the Czech Republic. Methods: A sample of Czech adults (n = 1,434; 48.3 ± 16.4 years; 49.65% women) participated in the online survey. We measured spirituality, religiosity, self-reported changes in relationships, disrupted feelings, and changes in behaviour during the pandemic. Results: Spiritual respondents were more likely to report increased physical activity, sex, reading and self-education, with odds ratios (ORs) ranging from 1.26 (95% confidence interval 1.09-1.46) to 1.56 (1.31-1.86). The combination of spirituality and religiosity led to an increase in the range of ORs to 1.57-2.69. Spiritual and religious participants were less likely to feel the decrease of hope by 70%, while mere spirituality significantly reduced the decrease of hope by only 30%. Religiosity itself led to a lower risk of reporting a disrupted day structure with an OR = 0.74 (0.58-0.95). Conclusion: Religiosity and spirituality separately help people during a pandemic in some areas. Especially their combination has a more positive impact on relationships, feelings, and behaviour.


Assuntos
COVID-19 , Espiritualidade , Adulto , COVID-19/epidemiologia , Estudos Transversais , República Tcheca/epidemiologia , Feminino , Humanos , Masculino , Pandemias
11.
Front Psychol ; 13: 1001187, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36687933

RESUMO

Introduction: The present investigation examined the stability of the twofold multidimensional structure of academic self-concepts (ASCs) in three domains, namely Chinese, math, and general school using four-wave data collected over 2 years among 552 Chinese secondary school students. Method: Adopting both a within-network and a between-network approach, confirmatory factor analyses (CFAs) and factor correlations were performed in Mplus 8.2. Results: The within-network results showed that CFA models wherein competence and affect dimensions were conflated generated unacceptable fit. In contrast, the CFAs in which competence and affect were modeled as separate latent factors consistently produced superior fit to the data. The between-network results demonstrated that in the Chinese and math domains and across the four-time waves, the competence components were more strongly related to the achievements in matching domains than the affect components were. Furthermore, both the competence and affect components of ASCs and achievements were positively correlated in the non-matching domains, which were somewhat contradictory to the internal/external frame of reference model predicting zero or negative relations. Discussion: Such results seem to suggest more involvement in social comparison than in dimensional comparison of Chinese students, which might be attributed to the collectivistic Chinese culture and the common phenomenon of academic social comparisons among Chinese adolescents in schools.

12.
Int J Psychophysiol ; 172: 46-59, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-34963634

RESUMO

Compassion is a psychological construct that has received increasing attention in recent years. Even though a lot of work has been done to identify neural correlates of empathy across studies, such work has not been properly done on neural correlates of compassion. Therefore, the aim was to systematically review the literature on neural correlates of compassion. We have searched through PsycINFO, PubMed and Web of Science for relevant articles published between 1985 and 2020. We included the studies (n = 35) examining the relationship between brain structure or function and compassion. Screening was performed by two authors, between whom a level of agreement was calculated. The quality of the studies was assessed by measures used in other studies as well by measures specific for our study aims. This study was conducted under PRISMA guidelines. Our analysis revealed that the most frequent neural associations with compassion across all analysed studies can be found in the orbital part of the left inferior frontal gyrus, in the right cerebellum, the bilateral middle temporal gyrus, in the bilateral insula and the right caudate nucleus. Our findings suggest that people displaying a lower compassion tend to have either lower neural activity or a grey matter volume in neural areas associated with reward.


Assuntos
Mapeamento Encefálico , Empatia , Encéfalo , Córtex Cerebral/fisiologia , Substância Cinzenta , Humanos , Imageamento por Ressonância Magnética
13.
Top Companion Anim Med ; 46: 100615, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34823068

RESUMO

Tear production is an important factor in maintaining proper function of the cornea and conjunctiva. The purpose of this study was to determine the effects of bolus followed by infusion of fentanyl, lidocaine, and ketamine on tear production as measured by the Schirmer I Tear Test (STT-I) in dogs. A prospective, randomized, "double-blind" study was performed. A total of 55 healthy conscious client-owned dogs were included in the study. Dogs were randomly allocated to one of four groups and given intravenous fentanyl 0.005 mg kg-1 followed by 0.005 mg kg-1 hour-1 (FEN-group), ketamine 0.6 mg kg-1 followed by 0.6 mg kg-1 hour-1 (KET-group), lidocaine 1 mg kg-1 followed by 1 mg kg-1 hour-1 (LID-group), or saline 0.3 mL kg-1 followed by 2 mL kg-1 hour-1 (SAL-group). The STT-I was performed prior to (baseline) and again 30 minutes (T30) after initiation of drug administration. Data were expressed as the median (minimum - maximum) and analyzed by Wilcoxon and Steel-Dwass tests (P < .05). The STT-I values increased little but were statistically significant in the KET-group from 18 (14-23) to 19 (14-25) (P = .039) and in the LID-group from 21 (14-25) to 20 (17-29) (P = .027). At 30 minutes, STT-I values were significantly higher in LID-group 20 (17-29) than in FEN-group 18 (12-22) (P = .006). Fentanyl, ketamine, and lidocaine administered at the studied doses as a bolus and then followed by an infusion within 30 minutes in healthy conscious dogs demonstrated a clinically insignificant effect on tear production as measured by STT-I.


Assuntos
Ketamina , Animais , Cães , Fentanila/farmacologia , Ketamina/farmacologia , Lidocaína/farmacologia , Estudos Prospectivos , Lágrimas
14.
Artigo em Inglês | MEDLINE | ID: mdl-34948569

RESUMO

Sensory processing sensitivity (SPS) is a common human neurobiological trait that is related to many areas of human life. This trait has recently received increased public interest. However, solid scientific research on SPS is lagging behind. Progress in this area is also hindered by a lack of comprehensive research tools suitable for a rapid assessment of SPS. Thus, the aim of this study was to offer a newly developed tool, the Sensory Processing Sensitivity Questionnaire (SPSQ), and to assess its psychometric properties and associations with emotional and relational variables measured during the first wave of the COVID-19 pandemic. We found the tool to have good psychometric characteristics: high temporal stability (r = 0.95) and excellent internal consistency (Cronbach's α = 0.92; McDonald's ω = 0.92). The fit of the SPSQ bi-factor model was satisfactory: χ2 (88.0) = 506.141; p < 0.001; CFI = 0.993; TLI = 0.990; RMSEA = 0.070; SRMR = 0.039. Testing of configural, metric, scalar and strict invariance suggested that the SPSQ assesses SPS equivalently between males and females. The scale's validity was supported via a strong association with an existing SPS measure. Further, we observed higher total SPSQ scores among women, students and religious respondents, and we found that more sensitive respondents reported higher feelings of anxiety and more deterioration in relationships during the COVID-19 pandemic. Thus, this study also identifies people with this trait as being potentially more vulnerable during periods of an increased presence of global stressors.


Assuntos
COVID-19 , Análise Fatorial , Feminino , Humanos , Masculino , Pandemias , Percepção , Psicometria , Reprodutibilidade dos Testes , SARS-CoV-2 , Inquéritos e Questionários
15.
Artigo em Inglês | MEDLINE | ID: mdl-34639633

RESUMO

Short and effective tools for measuring depression, anxiety and their resulting impairments are lacking in the Czech language. The abbreviated versions of the Overall Anxiety Severity and Impairment Scale (OASIS) and the Overall Depression Severity and Impairment Scale (ODSIS) show very good psychometric properties in English and other languages, and can be used in different settings for research or clinical purposes. The aim of this study was the psychometric evaluation and validation of the Czech versions of the abbreviated forms of both tools in the general population. A nationally representative sample of 2912 participants (age = 48.88, SD = 15.56; 55% female) was used. The non-parametric testing of the differences between sociodemographic groups revealed a higher level of anxiety and depression in students, females and religious respondents. Confirmatory Factor Analysis suggested a good fit for the unidimensional model of the OASIS: x2(4) = 38.28; p < 0.001; TLI = 0.999; CFI = 0.997; RMSEA = 0.078; SRMR = 0.027 and the ODSIS: x2(4) = 36.54; p < 0.001; TLI = 0.999; CFI = 0.999; RMSEA = 0.076; SRMR = 0.021 with the data. Both scales had an excellent internal consistency (OASIS: Cronbach's alpha = 0.95, McDonald's omega = 0.95 and ODSIS: Cronbach's alpha = 0.95, McDonald's omega = 0.95). A clinical cut-off of 15 was identified for the OASIS and a cut-off of 12 for the ODSIS. The study showed good validity for both scales. The Czech versions of the abbreviated OASIS and ODSIS were short and valid instruments for measuring anxiety and depression.


Assuntos
Depressão , Idioma , Ansiedade/diagnóstico , Ansiedade/epidemiologia , República Tcheca/epidemiologia , Depressão/diagnóstico , Depressão/epidemiologia , Análise Fatorial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Psicometria , Reprodutibilidade dos Testes , Inquéritos e Questionários
16.
Artigo em Inglês | MEDLINE | ID: mdl-34639246

RESUMO

This study examines the general health of consecrated persons (CP) in the Czech Republic (CZ) and in Slovakia (SK) compared to control samples of the Czech population. The sample of 293 CP participants (age: M = 47.52, SD = 9.57, females: 78.88%, 180 Czechs, 213 Slovaks) was compared with two control samples, one of which was nationally representative. Comparing CP with the general population, we measured the frequency of recent health complaints, the occurrence of chronic illnesses, general health and the individual chronotype. Compared to the representative sample, CP had a higher chance of suffering from pelvis minor pain and obesity but a lower chance of diabetes. Furthermore, CP had higher odds of having worse general health. Comparing "larks" with "night owls" among CP, the "night owls" had a significantly higher chance of suffering from worse general health. "Night owl" CP also seem to suffer more from backache and depression/anxiety and to have more problems with falling asleep. Compared to the overall society, CP in CZ and SK tend to have similar or worse general health. The results differ from the findings in the US, pointing to the positive health effects of the spiritual experience and structured daily routine of CP. Thus, this study shows the importance of more detailed research on the way of life of Czech and Slovak CP to determine the factors with the most negative health effects.


Assuntos
Saúde Pública , Religião , República Tcheca/epidemiologia , Feminino , Humanos , Masculino , Eslováquia/epidemiologia
17.
Artigo em Inglês | MEDLINE | ID: mdl-34067852

RESUMO

Empathy is a concept associated with various positive outcomes. However, to measure such a multifaceted concept, valid and reliable tools are needed. Negatively worded items (NWIs) are suspected to decrease some psychometric parameters of assessment instruments, which complicates the research of empathy. Therefore, the aim of this study was to assess the factor structure and validity of the TEQ on the Czech population, including the influence of the NWIs. Data were collected from three surveys. In total, 2239 Czech participants were included in our study. Along with socio-demographic information, we measured empathy, neuroticism, spirituality, self-esteem, compassion and social desirability. NWI in general yielded low communalities, factor loadings and decreased internal consistency. Therefore, in the next steps, we tested the model consisting of their positively reformulated versions. A higher empathy was found in females, married and religious individuals. We further found positive associations between empathy, compassion and spirituality. After the sample was split in half, exploratory factor analysis of the model with reformulated items was followed by confirmatory factor analysis (CFA), which supported a unidimensional solution with good internal consistency: Cronbach's α = 0.85 and McDonald's ω = 0.85. The CFA indicated an acceptable fit χ2 (14) = 83.630; p < 0.001; CFI = 0.997; TLI = 0.995; RMSEA = 0.070; SRMR = 0.037. The Czech version of the TEQ is a valid and reliable tool for the assessment of empathy. The use of NWIs in Czech or in a similar language environment seems to be questionable and their rewording may represent a more reliable approach.


Assuntos
Empatia , Idioma , República Tcheca , Análise Fatorial , Feminino , Humanos , Psicometria , Reprodutibilidade dos Testes , Inquéritos e Questionários
18.
Front Psychol ; 12: 647912, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33841284

RESUMO

Fowers et al. (2017) recently made a general argument for virtues as the characteristics necessary for individuals to flourish, given inherent human limitations. For example, people can flourish by developing the virtue of friendship as they navigate the inherent (healthy) human dependency on others. This general argument also illuminates a pathway to flourishing during the COVID-19 pandemic, the risks of which have induced powerful fears, exacerbated injustices, and rendered life and death decisions far more common. Contexts of risk and fear call for the virtue of courage. Courage has emerged more powerfully as a central virtue among medical personnel, first responders, and essential workers. Longstanding inequalities have been highlighted during the pandemic, calling for the virtue of justice. When important personal and public health decisions must be made, the central virtue of practical wisdom comes to the fore. Wise decisions and actions incorporate the recognition of relevant moral concerns and aims, as well as responding in fitting and practical ways to the specifics of the situation. Practicing courage, justice, and practical wisdom illuminates a path to flourishing, even in a pandemic.

19.
Data Brief ; 29: 105137, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32016145

RESUMO

This is a data set from long time testing of 18650 Lithium polymer batteries. It includes the following batteries: Samsung ICR18650-30B (2950 mAh), Joy NCR18650A300A (3000 mAh), GP 03624RC 3.6 V (3000 mAh) and EVC 200L06C (2000 mAh). For measurement, four batteries are connected in parallel and are charged and discharged with a controlled current of 1 A per battery. The current is controlled with a NI cRIO control system programmed in LabView. Battery current is measured with LEM LA 55-P current transducers; voltage is measured directly with the cRIO's analog inputs. The data set contains measurement for between 1200 and 1940 full charging/discharging cycles. The data set can be reused to get information about the dependence of battery capacity vs. number of cycles. Temperature of the battery is measured, therefore the dependence of capacity on temperature can be found out as well.

20.
Mol Biol Evol ; 36(10): 2292-2312, 2019 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-31387118

RESUMO

The discovery that the protist Monocercomonoides exilis completely lacks mitochondria demonstrates that these organelles are not absolutely essential to eukaryotic cells. However, the degree to which the metabolism and cellular systems of this organism have adapted to the loss of mitochondria is unknown. Here, we report an extensive analysis of the M. exilis genome to address this question. Unexpectedly, we find that M. exilis genome structure and content is similar in complexity to other eukaryotes and less "reduced" than genomes of some other protists from the Metamonada group to which it belongs. Furthermore, the predicted cytoskeletal systems, the organization of endomembrane systems, and biosynthetic pathways also display canonical eukaryotic complexity. The only apparent preadaptation that permitted the loss of mitochondria was the acquisition of the SUF system for Fe-S cluster assembly and the loss of glycine cleavage system. Changes in other systems, including in amino acid metabolism and oxidative stress response, were coincident with the loss of mitochondria but are likely adaptations to the microaerophilic and endobiotic niche rather than the mitochondrial loss per se. Apart from the lack of mitochondria and peroxisomes, we show that M. exilis is a fully elaborated eukaryotic cell that is a promising model system in which eukaryotic cell biology can be investigated in the absence of mitochondria.


Assuntos
Genoma de Protozoário , Membranas Intracelulares , Oximonadídeos/genética , Citoesqueleto de Actina , Íntrons , Dinâmica Mitocondrial , Oximonadídeos/enzimologia , Oximonadídeos/ultraestrutura , Proteoma
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