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ABCD. Arquivos Brasileiros de Cirurgia Digestiva     Open Access   (Followers: 4)
ACIMED     Open Access   (SJR: 0.11, h-index: 4)
Acta Amazonica     Open Access   (Followers: 3, SJR: 0.319, h-index: 13)
Acta Bioethica     Open Access   (Followers: 2, SJR: 0.119, h-index: 3)
Acta Bioquimica Clinica Latinoamericana     Open Access   (Followers: 1, SJR: 0.134, h-index: 7)
Acta Botanica Brasilica     Open Access   (Followers: 2, SJR: 0.403, h-index: 17)
Acta botánica mexicana     Open Access   (SJR: 0.212, h-index: 4)
Acta Cirurgica Brasileira     Open Access   (SJR: 0.271, h-index: 14)
Acta Limnologica Brasiliensia     Open Access   (Followers: 1, SJR: 0.204, h-index: 2)
Acta Literaria     Open Access   (Followers: 2, SJR: 0.1, h-index: 2)
Acta Médica Costarricense     Open Access  
Acta Medica Peruana     Open Access   (Followers: 2)
Acta Neurológica Colombiana     Open Access   (Followers: 1)
Acta Odontológica Latinoamericana     Open Access  
Acta Ortopédica Brasileira     Open Access   (Followers: 2, SJR: 0.159, h-index: 9)
Acta Paulista de Enfermagem     Open Access   (Followers: 1, SJR: 0.34, h-index: 12)
Acta Pediátrica Costarricense     Open Access   (Followers: 1)
Acta Scientiarum. Agronomy     Open Access   (Followers: 4, SJR: 0.65, h-index: 11)
Acta Toxicológica Argentina     Open Access  
Acta zoológica mexicana     Open Access  
Actualidades Biológicas     Open Access  
African Human Rights Law J.     Open Access   (Followers: 18)
African Natural History     Open Access   (Followers: 2)
Afro-Asia     Open Access  
Ágora - studies in psychoanalytic theory     Open Access   (Followers: 2, SJR: 0.1, h-index: 1)
Agricultura Tecnica     Open Access   (Followers: 6)
Agriscientia     Open Access  
Agrociencia     Open Access   (Followers: 2, SJR: 0.192, h-index: 13)
Agrociencia Uruguay     Open Access  
Agronomía Mesoamericana     Open Access   (Followers: 1)
Aisthesis     Open Access   (Followers: 1)
Ajayu Órgano de Difusión Científica del Departamento de Psicología UCBSP     Open Access  
Alea : Estudos Neolatinos     Open Access   (Followers: 1, SJR: 0.126, h-index: 2)
Alpha (Osorno)     Open Access   (Followers: 1)
Ambiente & sociedade     Open Access   (Followers: 2, SJR: 0.189, h-index: 5)
Ambiente & Agua : An Interdisciplinary J. of Applied Science     Open Access   (Followers: 1)
Ambiente Construído     Open Access   (Followers: 2)
América Latina en la historia económica     Open Access   (Followers: 1, SJR: 0.101, h-index: 1)
Anais Brasileiros de Dermatologia     Open Access   (Followers: 2, SJR: 0.456, h-index: 16)
Anais da Academia Brasileira de Ciências     Open Access   (Followers: 2, SJR: 0.344, h-index: 34)
Anais do Museu Paulista : História e Cultura Material     Open Access   (Followers: 1)
Anales de Medicina Interna     Open Access   (Followers: 1)
Anales del Instituto de la Patagonia     Open Access   (Followers: 2)
Anales del Sistema Sanitario de Navarra     Open Access   (Followers: 1, SJR: 0.179, h-index: 15)
Análise Psicológica     Open Access  
Análise Social     Open Access  
Análisis filosófico     Open Access  
Analisis Politico     Open Access   (Followers: 3, SJR: 0.1, h-index: 2)
Andean geology     Open Access   (Followers: 5, SJR: 0.825, h-index: 22)
Angiologia e Cirurgia Vascular     Open Access  
Annali dell'Istituto Superiore di Sanità     Open Access   (SJR: 0.272, h-index: 25)
Anuario Colombiano de Historia Social y de la Cultura     Open Access   (Followers: 1)
Apuntes : Revista de Estudios sobre Patrimonio Cultural - J. of Cultural Heritage Studies     Open Access   (Followers: 4)
Archivos argentinos de pediatría     Open Access  
Archivos de cardiología de México     Open Access   (Followers: 1, SJR: 0.136, h-index: 11)
Archivos de Medicina Interna     Open Access  
Archivos de Medicina Veterinaria     Open Access   (Followers: 1, SJR: 0.249, h-index: 13)
Archivos de Neurociencias     Open Access   (Followers: 2, SJR: 0.104, h-index: 4)
Archivos de Pediatria del Uruguay     Open Access   (Followers: 1)
Archivos de Zootecnia     Open Access   (Followers: 4, SJR: 0.231, h-index: 6)
Archivos Españoles de Urología     Open Access   (SJR: 0.228, h-index: 16)
Archivos Venezolanos de Farmacología y Terapéutica     Open Access   (Followers: 1, SJR: 0.102, h-index: 2)
Argos     Open Access   (Followers: 2, SJR: 0.1, h-index: 1)
ARQ     Open Access   (Followers: 5, SJR: 0.1, h-index: 1)
Arquitectura y Urbanismo     Open Access   (Followers: 2)
Arquivo Brasileiro de Medicina Veterinária e Zootecnia     Open Access   (Followers: 1, SJR: 0.292, h-index: 18)
Arquivos Brasileiros de Cardiologia     Open Access   (Followers: 1, SJR: 0.33, h-index: 29)
Arquivos Brasileiros de Endocrinologia e Metabologia     Open Access   (SJR: 0.329, h-index: 26)
Arquivos Brasileiros de Oftalmologia     Open Access   (SJR: 0.298, h-index: 15)
Arquivos de Gastroenterologia     Open Access   (Followers: 1, SJR: 0.43, h-index: 18)
Arquivos de Medicina     Open Access  
Arquivos de Neuro-Psiquiatria     Open Access   (SJR: 0.357, h-index: 33)
Arquivos do Instituto Biológico     Open Access  
Arquivos Internacionais de Otorrinolaringologia     Open Access  
ARS     Open Access   (Followers: 2)
Atenea (Concepción)     Open Access   (Followers: 1, SJR: 0.1, h-index: 2)
Atmósfera     Open Access   (SJR: 0.346, h-index: 13)
Audiology - Communication Research     Open Access   (Followers: 7)
Avaliação : Revista da Avaliação da Educação Superior (Campinas)     Open Access  
Avances en Odontoestomatologia     Open Access   (SJR: 0.112, h-index: 4)
Avances en Periodoncia e Implantología Oral     Open Access   (Followers: 5)
Bakhtiniana : Revista de Estudos do Discurso     Open Access  
BAR. Brazilian Administration Review     Open Access   (Followers: 1, SJR: 0.165, h-index: 4)
Biocell     Open Access   (SJR: 0.228, h-index: 19)
Biota Neotropica     Open Access   (SJR: 0.437, h-index: 12)
Biotecnología Aplicada     Open Access  
Boletim de Ciências Geodésicas     Open Access   (SJR: 0.202, h-index: 4)
Boletim do Museu Paraense Emílio Goeldi. Ciências Humanas     Open Access   (Followers: 1, SJR: 0.201, h-index: 2)
Boletin Chileno de Parasitologia     Open Access  
Boletín de Filología     Open Access  
Boletín de Historia Argentina y Americana Dr. Emilio Ravignani     Open Access   (Followers: 1)
Boletin de la Sociedad Argentina de Botanica     Open Access   (Followers: 1, SJR: 0.191, h-index: 3)
Boletín de la Sociedad Botánica de México     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Boletín de la Sociedad Geológica Mexicana     Open Access   (SJR: 0.206, h-index: 7)
Boletín del Museo Chileno de Arte Precolombino     Open Access   (Followers: 1)
Bosque     Open Access   (Followers: 1, SJR: 0.245, h-index: 7)
Bragantia     Open Access   (Followers: 2, SJR: 0.685, h-index: 18)
Brazilian Archives of Biology and Technology     Open Access   (Followers: 2, SJR: 0.237, h-index: 24)
Brazilian Dental J.     Open Access   (Followers: 2, SJR: 0.433, h-index: 28)

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Journal Cover   Brazilian Journal of Medical and Biological Research
  [SJR: 0.431]   [H-I: 62]   [0 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 0100-879X - ISSN (Online) 1414-431X
   Published by SciELO Homepage  [801 journals]
  • Is a contrast study really necessary prior to ureteroscopy?

    • Abstract: This study aimed to evaluate the effect of preoperative imaging techniques on the success and complication rates of ureteroscopy. We performed a retrospective analysis of 736 patients (455 males and 281 females), with a mean age of 45.5±15.2 years (range, 1-88 years), who underwent rigid ureteroscopic procedures for removal of ureteral stones. Patients were divided into 4 groups according to the type of imaging modality used: group I, intravenous urography (n=116); group II, computed tomography (n=381); group III, computed tomography and intravenous urography (n=91), and group IV, ultrasonography and abdominal plain film (n=148). Patients’ demographics, stone size and location, prior shock wave lithotripsy, lithotripsy technique, operation time, success rate, and rate of intraoperative complications were compared among the groups. There were no significant differences in success and complication rates among the groups. The stone-free rate after primary ureteroscopy was 87.1% in group I, 88.2% in group II, 96.7% in group III, and 89.9% in group IV (P=0.093). The overall incidence of intraoperative complications was 11.8%. According to the modified Satava classification system, 6.1% of patients had grade 1, 5.1% had grade 2, and 0.54% had grade 3 complications. Intraoperative complications developed in 12.1% of patients in group I, 12.6% of patients in group II, 7.7% of patients in group III, and 12.2% of patients in group IV (P=0.625). Our findings clearly demonstrate that ureteroscopic treatment of ureteral stones can be safely and effectively performed with no use of contrast study imaging, except in doubtful cases of anatomical abnormalities.
  • Assessment of indicators of vitamin A status in non-cirrhotic chronic
           hepatitis C patients

    • Abstract: Subjects with chronic liver disease are susceptible to hypovitaminosis A due to several factors. Therefore, identifying patients with vitamin deficiency and a requirement for vitamin supplementation is important. Most studies assessing vitamin A in the context of hepatic disorders are conducted using cirrhotic patients. A cross-sectional study was conducted in 43 non-cirrhotic patients with chronic hepatitis C to evaluate markers of vitamin A status represented by serum retinol, liver retinol, and serum retinol-binding protein levels. We also performed the relative dose-response test, which provides an indirect estimate of hepatic vitamin A reserves. These vitamin A indicators were assessed according to the stage of liver fibrosis using the METAVIR score and the body mass index. The sample study was predominantly composed of male subjects (63%) with mild liver fibrosis (F1). The relative dose-response test was <20% in all subjects, indicating vitamin A sufficiency. Overweight or obese patients had higher serum retinol levels than those with a normal body mass index (2.6 and 1.9 µmol/L, respectively; P<0.01). Subjects with moderate liver fibrosis (F2) showed lower levels of serum retinol (1.9 vs 2.5 µmol/L, P=0.01) and retinol-binding protein levels compared with those with mild fibrosis (F1) (46.3 vs 67.7 µg/mL, P<0.01). These results suggested an effect of being overweight on serum retinol levels. Furthermore, more advanced stages of liver fibrosis were related to a decrease in serum vitamin A levels.
  • Poor sleep in middle-aged women is not associated with menopause per

    • Abstract: Whether sleep problems of menopausal women are associated with vasomotor symptoms and/or changes in estrogen levels associated with menopause or age-related changes in sleep architecture is unclear. This study aimed to determine if poor sleep in middle-aged women is correlated with menopause. This study recruited women seeking care for the first time at the menopause outpatient department of our hospital. Inclusion criteria were an age ≥40 years, not taking any medications for menopausal symptoms, and no sleeping problems or depression. Patients were assessed with the Pittsburgh Sleep Quality Index (PSQI), modified Kupperman Index (KI), and Menopause Rating Scale (MRS). A PSQI score of <7 indicated no sleep disorder and ≥7 indicated a sleep disorder. Blood specimens were analyzed for follicle-stimulating hormone and estradiol levels. A total of 244 women were included in the study; 103 (42.2%) were identified as having a sleep disorder and 141 as not having one. In addition, 156 (64%) women were postmenopausal and 88 (36%) were not menopausal. Follicle-stimulating hormone and estradiol levels were similar between the groups. Patients with a sleep disorder had a significantly higher total modified KI score and total MRS score (both, P<0.001) compared with those without a sleep disorder. Correlations of the PSQI total score with the KI and MRS were similar in menopausal and non-menopausal women. These results do not support that menopause per se specifically contributes to sleep problems.
  • Microglia and neurons in the hippocampus of migratory sandpipers

    • Abstract: The semipalmated sandpiper Calidris pusilla and the spotted sandpiper Actitis macularia are long- and short-distance migrants, respectively. C. pusilla breeds in the sub-arctic and mid-arctic tundra of Canada and Alaska and winters on the north and east coasts of South America. A. macularia breeds in a broad distribution across most of North America from the treeline to the southern United States. It winters in the southern United States, and Central and South America. The autumn migration route of C. pusilla includes a non-stop flight over the Atlantic Ocean, whereas autumn route of A. macularia is largely over land. Because of this difference in their migratory paths and the visuo-spatial recognition tasks involved, we hypothesized that hippocampal volume and neuronal and glial numbers would differ between these two species. A. macularia did not differ from C. pusilla in the total number of hippocampal neurons, but the species had a larger hippocampal formation and more hippocampal microglia. It remains to be investigated whether these differences indicate interspecies differences or neural specializations associated with different strategies of orientation and navigation.
  • Negative emotions affect postoperative scores for evaluating functional
           knee recovery and quality of life after total knee replacement

    • Abstract: This study aimed to determine whether psychological factors affect health-related quality of life (HRQL) and recovery of knee function in total knee replacement (TKR) patients. A total of 119 TKR patients (male: 38; female: 81) completed the Beck Anxiety Inventory (BAI), Beck Depression Inventory (BDI), State Trait Anxiety Inventory (STAI), Eysenck Personality Questionnaire-revised (EPQR-S), Knee Society Score (KSS), and HRQL (SF-36). At 1 and 6 months after surgery, anxiety, depression, and KSS scores in TKR patients were significantly better compared with those preoperatively (P<0.05). SF-36 scores at the sixth month after surgery were significantly improved compared with preoperative scores (P<0.001). Preoperative Physical Component Summary Scale (PCS) and Mental Component Summary Scale (MCS) scores were negatively associated with extraversion (E score) (B=-0.986 and -0.967, respectively, both P<0.05). Postoperative PCS and State Anxiety Inventory (SAI) scores were negatively associated with neuroticism (N score; B=-0.137 and -0.991, respectively, both P<0.05). Postoperative MCS, SAI, Trait Anxiety Inventory (TAI), and BAI scores were also negatively associated with the N score (B=-0.367, -0.107, -0.281, and -0.851, respectively, all P<0.05). The KSS function score at the sixth month after surgery was negatively associated with TAI and N scores (B=-0.315 and -0.532, respectively, both P<0.05), but positively associated with the E score (B=0.215, P<0.05). The postoperative KSS joint score was positively associated with postoperative PCS (B=0.356, P<0.05). In conclusion, for TKR patients, the scores used for evaluating recovery of knee function and HRQL after 6 months are inversely associated with the presence of negative emotions.
  • Hormonal therapy with estradiol and drospirenone improves
           endothelium-dependent vasodilation in the coronary bed of ovariectomized
           spontaneously hypertensive rats

    • Abstract: Drospirenone (DRSP) is a progestin with anti-aldosterone properties and it reduces blood pressure in hypertensive women. However, the effects of DRSP on endothelium-dependent coronary vasodilation have not been evaluated. This study investigated the effects of combined therapy with estrogen (E2) and DRSP on endothelium-dependent vasodilation of the coronary bed of ovariectomized (OVX) spontaneously hypertensive rats. Female spontaneously hypertensive rats (n=87) at 12 weeks of age were randomly divided into sham operated (Sham), OVX, OVX treated with E2 (E2), and OVX treated with E2 and DRSP (E2+DRSP) groups. Hemodynamic parameters were directly evaluated by catheter insertion into the femoral artery. Endothelium-dependent vasodilation in response to bradykinin in the coronary arterial bed was assessed using isolated hearts according to a modified Langendorff method. Coronary protein expression of endothelial nitric oxide synthase and estrogen receptor alpha (ER-α) was assessed by Western blotting. Histological slices of coronary arteries were stained with hematoxylin and eosin, and morphometric parameters were analyzed. Oxidative stress was assessed in situ by dihydroethidium fluorescence. Ovariectomy increased systolic blood pressure, which was only prevented by E2+DRSP treatment. Estrogen deficiency caused endothelial dysfunction, which was prevented by both treatments. However, the vasodilator response in the E2+DRSP group was significantly higher at the three highest concentrations compared with the OVX group. Reduced ER-α expression in OVX rats was restored by both treatments. Morphometric parameters and oxidative stress were augmented by OVX and reduced by E2 and E2+DRSP treatments. Hormonal therapy with E2 and DRSP may be an important therapeutic option in the prevention of coronary heart disease in hypertensive post-menopausal women.
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