METALS IN THE ICM: WITNESSES OF CLUSTER FORMATION AND EVOLUTION

The baryonic composition of galaxy clusters and groups is dominated by a hot, X-ray emitting Intra-Cluster Medium (ICM). The mean metallicity of the ICM has been found to be roughly 0.3 ÷ 0.5 times the solar value, therefore a large fraction of this gas cannot be of purely primordial origin. Indeed, the distribution and amount of metals in the ICM is a direct consequence of the past history of star formation in the cluster galaxies and of the processes responsible for the injection of enriched material into the ICM. We here shortly summarize the current views on the chemical enrichment, focusing on the observational evidence in terms of metallicity measurements in clusters, spatial metallicity distribution and evolution, and expectations from future missions.

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Tracing the quenching history of cluster galaxies in the EAGLE simulation

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz1745 ◽

2019 ◽

Vol 488 (1) ◽

pp. 847-858 ◽

Cited By ~ 5

Author(s):

Diego Pallero ◽

Facundo A Gómez ◽

Nelson D Padilla ◽

S Torres-Flores ◽

R Demarco ◽

...

Keyword(s):

Star Formation ◽

Large Fraction ◽

Formation Rate ◽

Direct Consequence ◽

High Mass ◽

Cluster Galaxies ◽

Hydrodynamical Simulation ◽

Cluster Environment ◽

History Of ◽

Low Mass

ABSTRACT We use the Evolution and Assembly of GaLaxies and their Environments (EAGLE) hydrodynamical simulation to trace the quenching history of galaxies in its 10 most massive clusters. We use two criteria to identify moments when galaxies suffer significant changes in their star formation activity: (i) the instantaneous star formation rate (SFR) strongest drop, $\Gamma _{\rm SFR}^{\rm SD}$, and (ii) a ‘quenching’ criterion based on a minimum threshold for the specific SFR of ≲10$^{-11}\,\rm yr^{-1}$. We find that a large fraction of galaxies (${\gtrsim} 60\,{\rm per\,cent}$) suffer their $\Gamma _{\rm SFR}^{\rm SD}$ outside the cluster’s R200. This ‘pre-processed’ population is dominated by galaxies that are either low mass and centrals or inhabit low-mass hosts (1010.5 ≲ Mhost ≲ 1011.0 M⊙). The host mass distribution is bimodal, and galaxies that suffered their $\Gamma _{\rm SFR}^{\rm SD}$ in massive hosts ($10^{13.5} \lesssim M_{\rm host} \lesssim 10^{14.0}\, \mathrm{M}_{\odot }$) are mainly processed within the clusters. Pre-processing mainly limits the total stellar mass with which galaxies arrive in the clusters. Regarding quenching, galaxies preferentially reach this state in high-mass haloes ($10^{13.5} \lesssim M_{\rm host} \lesssim 10^{14.5}\, \mathrm{M}_{\odot }$). The small fraction of galaxies that reach the cluster already quenched have also been pre-processed, linking both criteria as different stages in the quenching process of those galaxies. For the z = 0 satellite populations, we find a sharp rise in the fraction of quenched satellites at the time of first infall, highlighting the role played by the dense cluster environment. Interestingly, the fraction of pre-quenched galaxies rise with final cluster mass. This is a direct consequence of the hierarchical cosmological model used in these simulations.

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Comparison of Efficacy of Refrigerated Oxytocin with Oxytocin Kept at Room Temperature for the Prevention of Post-Partum Haemorrhage in Vaginal Deliveries in a Tertiary Care Setting

Open Access Journal of Gynecology ◽

10.23880/oajg-16000207 ◽

2021 ◽

Vol 6 (1) ◽

Author(s):

Pandey U

Keyword(s):

Blood Loss ◽

Low Income ◽

Room Temperature ◽

Postpartum Haemorrhage ◽

Past History ◽

Post Partum ◽

Cold Chain ◽

Vaginal Deliveries ◽

History Of ◽

The Mean

Introduction: Postpartum haemorrhage is one of the leading causes of maternal death worldwide and it accounts for nearly one-quarter of all maternal deaths and almost half of all postpartum deaths in low-income countries. Primary postpartum haemorrhage (PPH) is the most common form of major obstetric haemorrhage. Materials and Methods: The study protocol was comprised of Consent, Measurement of Pre-delivery Hemoglobin, Administration of the Intervention, Measurement of postpartum blood loss and Measurement of Post-delivery (24-48 hours) Hemoglobin. Blood loss was measured using a calibrated drape. The drape was placed beneath the parturient buttocks and secured around her abdomen with ties. Blood loss was monitored for a minimum of one hour and was continued in the second hour in case of persistent bleeding. The drape with the collected blood was weighed on a scale. The weight of the drape and the container in which it is placed was deducted from the total recorded weight in order to obtain the weight of the blood collected in the drape. Blood loss weight in grams was converted to milliliters by dividing the figure in grams by 1.06 (blood density in grams per milliliter). Results: The cross tabulations were used to study the demographic, obstetrical and medical factors in women with obstetrical haemorrhage. Table 1 shows the selected sociodemographic characteristics of the study population. The mean age of cases and controls are 26.333.559 and 26.853.873 respectively. On comparison, they are statistically insignificant. (p=0.324). The educational, occupational and socioeconomic status was comparable between cases and controls (p >0.05). Table 2 shows Antenatal, intra-partum and post-partum data in cases and controls. Discussion & Conclusion: It is a study done in North India comparing the Oxytocin kept at room temperature with failure of maintenance of cold chain during transport and storage and the refrigerated Oxytocin. It is the common understanding and general training that Oxytocin must be stored in the refrigerator, failing which its efficacy reduces i.e. it, will not be effective in controlling PPH. During the study we compared the mean blood loss and change in hemoglobin levels in cases and control and despite the fact that major risk factor for PPH for example past history of PPH, past history of D&C, prolonged third stage labour duration, manual removal of placenta were comparable in both cases and controls, still the mean blood loss and change in hemoglobin values was more in cases than controls. This could be attributed to usage of market oxytocin which had failed cold chain maintenance resulted in less effective oxytocin in prevention of PPH, Hence causing more blood loss and drop in hemoglobin values. This shows the need of room temperature stable uterotonic drug in LMIC’s like ours. Recently room temperature stable carbetocin shows the potential as an effective uterotonic drug for the prevention of PPH. However according to various studies carbetocin cannot be used for induction or augmentation of labour so it cannot replace oxytocin fully, rather it acts as a part of collective PPH reduction strategy.

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Authorship characteristics of retracted COVID-19 articles

ABCS Health Sciences ◽

10.7322/abcshs.2021207.1924 ◽

2021 ◽

Author(s):

Rafaela Carolina da Silva ◽

Hadiseh Heidari ◽

Amanda Mendes da Silva

Keyword(s):

Public Health ◽

Past History ◽

H Index ◽

History Of ◽

Research Findings ◽

The Mean ◽

Number Of Authors

Following the explosion of publications about COVID-19, some of these articles were retracted. These articles are potentially dangerous to public health as they can mislead about the nature of the virus. The growth and sensitive nature of retracted papers led to bibliometrics studies on them, although few, which focused more on the level of documents. This study, instead, examines the characteristics of the authors of these articles. 54 retracted COVID-19 articles that fit our study’s criteria were identified. The results revealed that 32% of these authors were MD, and about one-fifth of them had a past history of publishing retracted articles. The average number of authors per article was 6. Also, according to their profile in the Scopus, the mean number of documents, citations and their H-index were 61, 3159 and 12, respectively. Women also appeared in one-third of the articles as first and last authors. Continued research about retracted COVID-19 articles can continue to help prevent the further dissemination of questionable research findings.

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Star Cluster Encounters in the Magellanic Clouds

Symposium - International Astronomical Union ◽

10.1017/s0074180900118509 ◽

1999 ◽

Vol 190 ◽

pp. 443-444

Author(s):

M.R. de Oliveria ◽

H. Dottori ◽

E. Bica

Keyword(s):

Initial Conditions ◽

Past History ◽

Cluster Formation ◽

Star Cluster ◽

Magellanic Clouds ◽

The Past ◽

Sky Survey ◽

History Of ◽

Fundamental Insight ◽

Selection Of

The study of star cluster pairs in the Magellanic Clouds (MCs) has been explored extensively in the past years (Bhatia & Hatzidimitriou 1988; Rodrigues et al. 1994; de Oliveira et al. 1998). The evolution of these pairs can provide fundamental insight into the past history of cluster formation in the MCs.We have selected MC clusters (Bica & Schmitt 1995; Bica et al. 1998) with morphologies resembling those of the present models. The images in this selection of pairs were obtained from the Digital Sky Survey (DSS). We have also performed N-body simulations of star cluster encounters under different initial conditions, with the total number of particles per simulation ranging from 1024 to 20480.

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Post-COVID-19 Syndrome: Nine Months after SARS-CoV-2 Infection in a Cohort of 354 Patients: Data from the First Wave of COVID-19 in Nord Franche-Comté Hospital, France

Microorganisms ◽

10.3390/microorganisms9081719 ◽

2021 ◽

Vol 9 (8) ◽

pp. 1719

Author(s):

Souheil Zayet ◽

Hajer Zahra ◽

Pierre-Yves Royer ◽

Can Tipirdamaz ◽

Julien Mercier ◽

...

Keyword(s):

Past History ◽

Duration Of Symptoms ◽

Persistent Symptoms ◽

Significant Difference ◽

High Prevalence ◽

History Of ◽

Group 3 ◽

The Mean ◽

Pain Symptoms ◽

Smell Loss

(1) Background. Post-COVID-19 syndrome is defined as the persistence of symptoms after confirmed SARS-CoV-2 infection. (2) Methods. ANOSVID is an observational retrospective study in Nord Franche-Comté Hospital in France that included adult COVID-19 patients confirmed by RT-PCR from 1 March 2020 to 31 May 2020. The aim was to describe patients with post-COVID-19 syndrome with persistent symptoms (PS group) and to compare them with the patients without persistent symptoms (no-PS group). (3) Results. Of the 354 COVID-19 patients, 35.9% (n = 127) reported persistence of at least one symptom after a mean of 289.1 ± 24.5 days after symptom onset. Moreover, 115 patients reported a recurrence of symptoms after recovery, and only 12 patients reported continuous symptoms. The mean age of patients was 48.6 years (19–93) ± 19.4, and 81 patients (63.8%) were female. Patients in the PS group had a longer duration of symptoms of initial acute SARS-CoV-2 infection than patients in the no-PS group (respectively, 57.1 ± 82.1 days versus 29.7 ± 42.1 days, p < 0.001). A majority of patients (n = 104, 81.9%) reported three or more symptoms. The most prevalent persistent symptoms were loss of smell (74.0%, n = 94), fatigue (53.5%, n = 68), loss of taste (31.5%, n = 40), and dyspnea (30.7%, n = 39). These were followed by pain symptoms (26.8% (n = 34), 26.0% (n = 33), 24.4% (n = 31); headache, arthralgia, and myalgia, respectively). More than half of patients reporting persistent symptoms (58%, n = 73) were healthcare workers (HCWs). Among outpatients, this population was more present in the PS group than the no-PS group ((86.6%) n = 71/82 versus (72.2%) n = 109/151, p = 0.012). Post-COVID-19 syndrome was more frequent in patients with a past history of chronic rhinosinusitis (8.7% (n = 11%) versus 1.3% (n = 3), p < 0.001). No significant difference was found regarding clinical characteristics and outcome, laboratory, imaging findings, and treatment received in the two groups. (4) Conclusions. More than a third of our COVID-19 patients presented persistent symptoms after SARS-CoV-2 infection, particularly through loss of smell, loss of taste, fatigue, and dyspnea, with a high prevalence in HCWs among COVID-19 outpatients.

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Depersonalisation disorder: clinical features of 204 cases

The British Journal of Psychiatry ◽

10.1192/bjp.182.5.428 ◽

2003 ◽

Vol 182 (5) ◽

pp. 428-433 ◽

Cited By ~ 116

Author(s):

Dawn Baker ◽

Elaine Hunter ◽

Emma Lawrence ◽

Nicholas Medford ◽

Maxine Patel ◽

...

Keyword(s):

Age Of Onset ◽

Past History ◽

Self Report ◽

Anxiety And Depression ◽

Dissociative Amnesia ◽

Male Preponderance ◽

History Of ◽

Dsm Iv ◽

The Mean ◽

State Examination

BackgroundDepersonalisation disorder is a poorly understood and underresearched syndrome.AimsTo carry out a large and comprehensive clinical and psychopathological survey of a series of patients who made contact with a research clinic.MethodA total of 204 consecutive eligible referrals were included: 124 had a full psychiatric examination using items of the Present State Examination to define depersonalisation/derealisation and 80 had either a telephone interview (n=22) or filled out a number of self-report questionnaires. Cases assessed were diagnosed according to DSM–IV criteria.ResultsThe mean age of onset was 22.8 years; early onset was associated with greater severity There was a slight male preponderance. The disorder tended to be chronic and persistent. Seventy-one per cent met DSM–IV criteria for primary depersonalisation disorder. Depersonalisation symptom scores correlated with both anxiety and depression and a past history of these disorders was commonly reported. ‘Dissociative amnesia’ was not prominent.ConclusionsDepersonalisation disorder is a recognisable clinical entity but appears to have significant comorbidity with anxiety and depression. Research into its aetiology and treatment is warranted.

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The past history of galaxy clusters told by their present neighbours

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa1831 ◽

2020 ◽

Vol 496 (4) ◽

pp. 5139-5148

Author(s):

Jenny G Sorce ◽

Stefan Gottlöber ◽

Gustavo Yepes

Keyword(s):

Galaxy Clusters ◽

Past History ◽

Virgo Cluster ◽

Coma Cluster ◽

The Past ◽

Formation History ◽

History Of ◽

Observable Data ◽

The Mean ◽

Mass Assembly

ABSTRACT Galaxy clusters can play a key role in modern cosmology, provided their evolution is properly understood. However, observed clusters give us only a single timeframe of their dynamical state. Therefore, finding present observable data of clusters that are well correlated to their assembly history constitutes an inestimable tool for cosmology. Former studies correlating environmental descriptors of clusters to their formation history are dominated by halo mass–environment relations. This paper presents a mass-free correlation between the present neighbour distribution of cluster-size haloes and the latter mass assembly history. From the Big Multidark simulation, we extract two large samples of random haloes with masses ranging from Virgo to Coma cluster sizes. Additionally, to find the main environmental culprit for the formation history of the Virgo cluster, we compare the Virgo-size haloes to 200 Virgo-like haloes extracted from simulations that resemble the local Universe. The number of neighbours at different cluster-centric distances permits discriminating between clusters with different mass accretion histories. Similarly to Virgo-like haloes, clusters with numerous neighbours within a distance of about two times their virial radius experience a transition at z ≈ 1 between an active period of mass accretion, relative to the mean, and a quiet history. In contrary, clusters with few neighbours share an opposite trend: from passive to active assembly histories. Additionally, clusters with massive companions within about four times their virial radius tend to have recent active merging histories. Therefore, the radial distribution of cluster neighbours provides invaluable insights into the past history of these objects.

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Factors Effecting Mastalgia

Breast Care ◽

10.1159/000444359 ◽

2016 ◽

Vol 11 (3) ◽

pp. 188-193 ◽

Cited By ~ 4

Author(s):

Tunc Eren ◽

Adem Aslan ◽

Ibrahim A. Ozemir ◽

Hakan Baysal ◽

Julide Sagiroglu ◽

...

Keyword(s):

Breast Imaging ◽

Past History ◽

Breast Disease ◽

Caffeine Consumption ◽

Asymptomatic Group ◽

Malignant Breast ◽

History Of ◽

The Mean ◽

Benign Disorders ◽

Breast Fed

Background: Breast pain is one of the leading complaints that ends up with referral to breast surgery clinics. The purpose of the present study was to investigate the factors that cause mastalgia, and its relation with benign or malignant breast disease. Methods: The study was performed in 700 patients. Data obtained from surveys, and imaging findings were prospectively recorded, and analyzed. Results: The mean age was 45.20 ± 10.78 years. The mastalgia group included 500 cases; the asymptomatic group comprised 200 individuals. Stressful lifestyle, caffeine consumption, and smoking were associated with mastalgia (p < 0.05). Rates of women who had breast fed 3 times or more were higher in the mastalgia group (p < 0.05). Increased breast density, and breast imaging-reporting and data system (BI-RADS) 2 mammography findings were related with mastalgia (p < 0.05). Cysts and fibroadenomas were more common in the mastalgia group (p < 0.05). The incidence of a past history of malignant breast disease was significantly higher in the mastalgia group (p < 0.05). Conclusions: Stress, caffeine, smoking, lactation frequency, and benign disorders were factors detected to be related with mastalgia. Although a significant relation between mastalgia and malignant breast disease was detected in our study, more controlled studies are still required to investigate this issue further.

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A hospital based study: is the prescription of Benzodiazepine consistent with the guidelines?

Journal of Universal College of Medical Sciences ◽

10.3126/jucms.v2i1.10489 ◽

2014 ◽

Vol 2 (1) ◽

pp. 30-34

Author(s):

DK Thapa ◽

N Lammichhane ◽

S Subedi

Keyword(s):

Past History ◽

Psychiatric Patients ◽

Cross Sectional Study ◽

Cross Sectional ◽

Medical College ◽

Wide Range ◽

Benzodiazepine Use ◽

History Of ◽

The Mean

OBJECTIVE: Benzodiazepines are one of the most frequently prescribed psychotropic drugs. They confer a therapeutic value in a wide range of conditions. They exert sedative/ hypnotic, anxiolytic, anticonvulsant, muscle relaxant and amnesic action. Nearly all of the disadvantages of benzodiazepines result from long term use leading to development of tolerance, dependence and withdrawal. This study was done to determine if the pattern of benzodiazepines prescription among the psychiatric patients is consistent with the guideline. METHODS: This was a descriptive, hospital based cross- sectional study done in the psychiatry department at Gandaki Medical College. The consecutive 50 patients who either had a past history of treatment with or were still regularly on prescription for any of the following medication; alprazolam, chlordiazepoxide, clonazepam,diazepam, and lorazepam were included in the study. The psychiatric diagnosis of the patients, duration and types of benzodiazepines dispensed to patients were worked up. The duration of study was 6 months (Jan- June 2013). RESULTS: The total numbers of subjects enrolled in the study was 50. Female constituted 28 (56%), majority were married 45 (90%) and most of the subjects 31 (62%), were from the local district of Kaski. The mean age of the subjects was 41.1 ± 15 .3 years. Among the types of benzodiazepines prescribed, clonazepam was the most frequently prescribed benzodiazepine. Dispensing of less than 30-days or 1 month supply of benzodiazepines, a practice typically recommended by practice guidelines, occurred in only 5 ( 10%) of the users. The study showed that there was a huge variation regarding the duration of benzodiazepines use, ranging from the period of less than of 1 month to the maximum duration of 192 months or 16 years. The mean duration of the benzodiazepine use was 34.8 ± 50 months i.e. near about 3 years. CONCLUSIONS: Despite guideline cautions, long-term benzodiazepines use remains a common treatment pattern. DOI: http://dx.doi.org/10.3126/jucms.v2i1.10489 Journal of Universal College of Medical Sciences (2014) Vol.2(1): 30-34

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De Novo Aneurysm: Case Reports and Literature Review

Neurosurgery ◽

10.1227/neu.0b013e3182196489 ◽

2011 ◽

Vol 69 (3) ◽

pp. E761-E767 ◽

Cited By ~ 17

Author(s):

Nunung Nur Rahmah ◽

Tetsuyoshi Horiuchi ◽

Yoshikazu Kusano ◽

Tetsuo Sasaki ◽

Kazuhiro Hongo

Keyword(s):

Arterial Hypertension ◽

De Novo ◽

Past History ◽

Case Reports ◽

Previous History ◽

Anterior Circulation ◽

Risk Of Rupture ◽

History Of ◽

The Mean

Abstract BACKGROUND AND IMPORTANCE: Formation of cerebral de novo aneurysms (CDNAs) is rare, and the pathogenesis remains obscure. We analyzed factors involved in formation of CDNAs and suggest guidelines for follow-up of patients. CLINICAL PRESENTATION: We retrospectively reviewed intracranial aneurysms at our institute and published reports from 1964 to 2008. Eleven patients were found with CDNAs, and 138 patients were collected from the published literature. We assessed the clinical characteristics, such as sex, size, and site of CDNA, past history, and time to occurrence of CDNAs. Of 11 patients, 10 were female and 1 was male; the mean age of the first onset was 53 years (range, 25-69 years). The mean time between first aneurysms and CDNAs was 10.6 years (range, 3-29 years). The most common site of occurrence was anterior circulation. One patient experienced contralateral occurrence, and 2 patients changed from anterior to posterior circulation CDNAs. Six (54.5%) patients had a history of arterial hypertension. Results from analysis of the whole series from the literature revealed that the risk of rupture increased with a previous history of hemorrhage. Contralateral occurrence of CDNAs was related to previous location, and multiplicity, whereas the occurrence of anterior to posterior changes of CDNAs and shorter interval only correlated with an older age group. CONCLUSION: Although the formation of CDNAs is rare, several factors may contribute to its occurrence. Female patients with a history of arterial hypertension were at a higher risk for CDNA occurrence. We recommend follow-up imaging studies within 10 years after the initial aneurysms; therefore, at least 50% of CDNAs can be found before rupture.

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