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1.
Phys Rev Lett ; 133(7): 072502, 2024 Aug 16.
Artigo em Inglês | MEDLINE | ID: mdl-39213578

RESUMO

Excited states in ^{10}B were populated with the ^{10}B(p,p^{'}γ)^{10}B^{*} reaction at 8.5 MeV and their γ decay was investigated via coincidence γ-ray spectroscopy. The emitted γ rays were measured using large-volume LaBr_{3}:Ce and CeBr_{3} detectors placed in anti-Compton shields. This allowed the observation of weak γ-ray transitions, such as the M3 transition between the J^{π},T=0^{+},1 isobaric analog state (IAS) and the J^{π},T=3^{+},0 ground state and the E2 transition between the J^{π},T=2_{1}^{+},0 state and the IAS, i.e., performing measurements of branching ratios at the level of λ≥10^{-4}. For the first time in ^{10}B, the competing M1 and M3 transitions from the decay of the IAS have been observed in a γ spectroscopy experiment. The experimental results are compared with ab initio no-core shell model calculation using the newest version of the local position-space chiral N^{3}LO nucleon-nucleon interaction. The calculations reproduce correctly the ordering of the bound states in ^{10}B, and are in reasonable agreement with the observed branching ratios and reduced transition probabilities.

2.
Phys Rev Lett ; 131(2): 022501, 2023 Jul 14.
Artigo em Inglês | MEDLINE | ID: mdl-37505957

RESUMO

The ß decays from both the ground state and a long-lived isomer of ^{133}In were studied at the ISOLDE Decay Station (IDS). With a hybrid detection system sensitive to ß, γ, and neutron spectroscopy, the comparative partial half-lives (logft) have been measured for all their dominant ß-decay channels for the first time, including a low-energy Gamow-Teller transition and several first-forbidden (FF) transitions. Uniquely for such a heavy neutron-rich nucleus, their ß decays selectively populate only a few isolated neutron unbound states in ^{133}Sn. Precise energy and branching-ratio measurements of those resonances allow us to benchmark ß-decay theories at an unprecedented level in this region of the nuclear chart. The results show good agreement with the newly developed large-scale shell model (LSSM) calculations. The experimental findings establish an archetype for the ß decay of neutron-rich nuclei southeast of ^{132}Sn and will serve as a guide for future theoretical development aiming to describe accurately the key ß decays in the rapid-neutron capture (r-) process.

3.
Phys Rev Lett ; 125(19): 192501, 2020 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-33216605

RESUMO

The ß decay of ^{208}Hg into the one-proton hole, one neutron-particle _{81}^{208}Tl_{127} nucleus was investigated at CERN-ISOLDE. Shell-model calculations describe well the level scheme deduced, validating the proton-neutron interactions used, with implications for the whole of the N>126, Z<82 quadrant of neutron-rich nuclei. While both negative and positive parity states with spin 0 and 1 are expected within the Q_{ß} window, only three negative parity states are populated directly in the ß decay. The data provide a unique test of the competition between allowed Gamow-Teller and Fermi, and first-forbidden ß decays, essential for the understanding of the nucleosynthesis of heavy nuclei in the rapid neutron capture process. Furthermore, the observation of the parity changing 0^{+}→0^{-}ß decay where the daughter state is core excited is unique, and can provide information on mesonic corrections of effective operators.

4.
Environ Res ; 160: 331-338, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-29054087

RESUMO

Cities undergoing climate change and rapid urbanization are faced with significant transformational processes that affect the environment and society, challenging them to become more sustainable and resilient. The promotion of nature-based solutions represents an efficient approach to meet sustainability targets in cities and improve the quality of life of citizens. The association of large components of green infrastructure, such as urban parks, with physical activity can counteract the sedentary lifestyle endemic to cities and improve the overall health and well-being of individuals (Carrus et al., 2013; Scopelliti et al., 2016). By promoting a sustainable means of transport and connecting green spaces within a highly urbanized city, bicycle lanes represent an effective tool for associating physical activity with nature in cities allowing bicycle users to benefit from the positive health effects of nature-based solutions. Our study focuses on the potential of bicycle lanes to improve functional connectivity among green spaces. We administered 820 questionnaires in 34 green spaces (i.e., urban parks) in Bucharest, Romania, to identify the factors influencing the use of bicycle lanes connecting urban parks and to understand which planning criteria for bicycle lanes are considered as the most important by park visitors. We applied binary and ordinal logistic regressions and found that the factors affecting bicycle lane use are illegally parked cars and lack of accessibility to urban parks. The criteria preferred by park visitors for bicycle lane planning are determined by experience level and frequency of bicycle use. To develop a functional and integrated bicycle lane network that can make cities healthier and more sustainable, policy makers are advised to engage in a public participatory process and focus on the needs of bicycle users.


Assuntos
Ciclismo , Cidades , Planejamento de Cidades , Parques Recreativos , Participação da Comunidade , Romênia , Meios de Transporte , Urbanização
5.
Br J Surg ; 104(4): 358-376, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28199015

RESUMO

BACKGROUND: Radical surgery provides the best chance of cure for adrenocortical carcinoma (ACC), but perioperative surgical care for these patients is yet to be standardized. METHODS: A working group appointed jointly by ENSAT and ESES used Delphi methodology to produce evidence-based recommendations for the perioperative surgical care of patients with ACC. Papers were retrieved from electronic databases. Evidence and recommendations were classified according to the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) system, and were discussed until consensus was reached within the group. RESULTS: Twenty-five recommendations for the perioperative surgical care of patients with ACC were formulated. The quality of evidence is low owing to the rarity of the disease and the lack of prospective surgical trials. Multi-institutional prospective cohort studies and prospective RCTs are urgently needed and should be strongly encouraged. CONCLUSION: The present evidence-based recommendations provide comprehensive advice on the optimal perioperative care for patients undergoing surgery for ACC.


Assuntos
Neoplasias do Córtex Suprarrenal/cirurgia , Adrenalectomia/métodos , Carcinoma Adrenocortical/cirurgia , Neoplasias do Córtex Suprarrenal/diagnóstico por imagem , Carcinoma Adrenocortical/diagnóstico por imagem , Assistência ao Convalescente , Procedimentos Cirúrgicos de Citorredução/métodos , Humanos , Excisão de Linfonodo/métodos , Metástase Linfática , Anamnese/métodos , Prontuários Médicos , Metástase Neoplásica , Recidiva Local de Neoplasia/diagnóstico por imagem , Recidiva Local de Neoplasia/cirurgia , Neoplasias Primárias Múltiplas/cirurgia , Segunda Neoplasia Primária/cirurgia , Tratamentos com Preservação do Órgão/métodos , Cuidados Paliativos/métodos , Exame Físico/métodos , Tomografia por Emissão de Pósitrons/métodos , Cuidados Pré-Operatórios/métodos , Encaminhamento e Consulta , Tomografia Computadorizada por Raios X/métodos
6.
Phys Rev Lett ; 118(16): 162502, 2017 Apr 21.
Artigo em Inglês | MEDLINE | ID: mdl-28474931

RESUMO

A search for shape isomers in the ^{66}Ni nucleus was performed, following old suggestions of various mean-field models and recent ones, based on state-of-the-art Monte Carlo shell model (MCSM), all considering ^{66}Ni as the lightest nuclear system with shape isomerism. By employing the two-neutron transfer reaction induced by an ^{18}O beam on a ^{64}Ni target, at the sub-Coulomb barrier energy of 39 MeV, all three lowest-excited 0^{+} states in ^{66}Ni were populated and their γ decay was observed by γ-coincidence technique. The 0^{+} states lifetimes were assessed with the plunger method, yielding for the 0_{2}^{+}, 0_{3}^{+}, and 0_{4}^{+} decay to the 2_{1}^{+} state the B(E2) values of 4.3, 0.1, and 0.2 Weisskopf units (W.u.), respectively. MCSM calculations correctly predict the existence of all three excited 0^{+} states, pointing to the oblate, spherical, and prolate nature of the consecutive excitations. In addition, they account for the hindrance of the E2 decay from the prolate 0_{4}^{+} to the spherical 2_{1}^{+} state, although overestimating its value. This result makes ^{66}Ni a unique nuclear system, apart from ^{236,238}U, in which a retarded γ transition from a 0^{+} deformed state to a spherical configuration is observed, resembling a shape-isomerlike behavior.

7.
Br J Surg ; 102(4): 291-306, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25689291

RESUMO

BACKGROUND: Adrenocortical cancer (ACC) is a rare disease with a dismal prognosis. The majority of patients are diagnosed with advanced disease and raise difficult management challenges. METHODS: All references identified in PubMed, published between 2004 and 2014, using the keywords 'adrenocortical cancer' or 'adrenal surgery' or both, were uploaded into a database. The database was interrogated using keywords specific for each field studied. RESULTS: In all, 2049 publications were identified. There is ongoing debate about the feasibility and oncological outcomes of laparoscopic adrenalectomy for small ACCs, and data derived from institutional case series have failed to provide an evidence level above expert opinion. The use of mitotane (1-(2-chlorophenyl)-1-(4-chlorophenyl)-2,2-dichloroethane) in combination with chemotherapy in the treatment of metastatic disease has been assessed in an international randomized trial (FIRM-ACT trial) involving patients with ACC. Based on this trial, mitotane plus etoposide, doxorubicin and cisplatin is now the established first-line cytotoxic therapy owing to a higher response rate and longer median progression-free survival than achieved with streptozocin-mitotane. For patients with tumours smaller than 5 cm and with no signs of lymph node or distant metastases, survival is favourable with a median exceeding 10 years. However, the overall 5-year survival rate for all patients with ACC is only 30 per cent. CONCLUSION: Open and potentially laparoscopic adrenalectomy for selected patients is the main treatment for non-metastatic ACC, but the overall 5-year survival rate remains low.


Assuntos
Neoplasias do Córtex Suprarrenal/terapia , Carcinoma Adrenocortical/terapia , Neoplasias do Córtex Suprarrenal/diagnóstico , Neoplasias do Córtex Suprarrenal/mortalidade , Adrenalectomia/estatística & dados numéricos , Carcinoma Adrenocortical/diagnóstico , Carcinoma Adrenocortical/mortalidade , Adulto , Antineoplásicos Hormonais/uso terapêutico , Biomarcadores Tumorais/metabolismo , Quimioterapia Adjuvante , Criança , Feminino , Humanos , Laparoscopia/estatística & dados numéricos , Masculino , Metastasectomia/estatística & dados numéricos , Mitotano/uso terapêutico , Mutação , Recidiva Local de Neoplasia/mortalidade , Recidiva Local de Neoplasia/terapia , Estadiamento de Neoplasias , Prognóstico , Taxa de Sobrevida
8.
Ann R Coll Surg Engl ; 106(7): 620-627, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38362758

RESUMO

INTRODUCTION: There is wide variability in the perioperative management of phaeochromocytoma and paraganglioma (PPGL) in different centres. This study aimed to summarise the management of PPGLs as reported in the United Kingdom Registry for Endocrine and Thyroid Surgery (UKRETS) database and to determine current perioperative management of PPGLs by surveying UK clinicians. METHODS: Data recorded on UKRETS from 2005 to 2021 were subjected to descriptive analyses. British Association of Endocrine and Thyroid Surgeons members were invited to participate in an open survey relating to the perioperative management of patients with PPGLs. RESULTS: A total of 2,007 operations for PPGL from 49 participating centres were included. The median annual workload in each centre was four cases. Operations were performed predominantly laparoscopically (69%). The median length of stay (4 days) was the same in groups of surgeons stratified by volume. The survey had 29 respondents from 22 centres across the UK, and a formal protocol for perioperative management exists in 48% of the centres. Phenoxybenzamine (72%) was preferred for alpha-blockade. The practice of admitting patients for optimisation from 1 to 7 days before the day of surgery was common (62%). Central venous pressure and blood glucose monitoring were mentioned as routine intraoperative adjuncts by 72% of the responders. CONCLUSIONS: There is significant variation in the workload and perioperative management of PPGLs in the UK. This is potentially detrimental to patient outcomes and a consensus document might be beneficial to harmonise practice across the UK.


Assuntos
Neoplasias das Glândulas Suprarrenais , Paraganglioma , Feocromocitoma , Humanos , Reino Unido , Paraganglioma/cirurgia , Feocromocitoma/cirurgia , Neoplasias das Glândulas Suprarrenais/cirurgia , Padrões de Prática Médica/estatística & dados numéricos , Laparoscopia/estatística & dados numéricos , Assistência Perioperatória/normas , Assistência Perioperatória/métodos , Tempo de Internação/estatística & dados numéricos , Sistema de Registros , Inquéritos e Questionários/estatística & dados numéricos , Fenoxibenzamina/uso terapêutico
9.
Cureus ; 16(1): e52325, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38361725

RESUMO

Riedel's lobe is a rare anatomical variant of the liver, more often being diagnosed incidentally, with the patient being investigated for other underlying pathology. As regards acute pancreatitis, this represents one of the most treated diseases worldwide in gastroenterology with a variable severity and outcome. Here, we report a case of a non-palpable Riedel's lobe in a 47-year-old man, smoker, and chronic alcohol consumer, who presented to the hospital with epigastric pain radiating in the right hypochondrium, accompanied by nausea. Based on his clinical examination, laboratory, and imaging findings, he was admitted in the gastroenterology department with the diagnosis of alcohol-related acute pancreatitis. The computed tomography scan emphasized the presence of Riedel's lobe, causing an increased anterior diameter of the liver. Riedel's lobe is, in most cases, an unforeseen radiologic disclosure, which can remain clinically latent, or it can raise confusion regarding the differential diagnosis.

10.
Ann R Coll Surg Engl ; 104(9): 703-709, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35446717

RESUMO

BACKGROUND: Fine-needle aspiration cytology (FNAC) is an integral part of thyroid nodule assessment. Nodules with an indeterminate cytology (THY3a-f) require formal histological assessment to confirm benign or malignant pathology. This study aimed to provide data for an evidence-based approach for management of patients with THY3f nodules. METHODS: Retrospective review of patients who had a thyroid FNAC reported as suspicious of follicular neoplasm (THY3f) or showing atypia (THY3a) were identified, and clinical, operative and outcomes data were analysed. RESULTS: Between 2018 and 2020, 200 patients (167F:33M, median age 51 years (range:18-86 years)) had a THY3f cytology. Most presented with a palpable nodule (n=104; 68.4%). Overall, 152 (76.0%;130F:23M) underwent surgery and 31 (20.4%) were found to have a thyroid carcinoma (22 follicular carcinomas, 7 papillary carcinomas, 1 medullary thyroid carcinoma and 1 metastatic renal carcinoma). An additional incidental carcinoma (size: 0.7-13mm) was found in seven (4.6%). Among those with cancer, a completion thyroidectomy and radioactive iodine treatment was indicated in nine (<6% of the entire cohort). Previously suggested risk factors for malignancy, eg male gender, large tumour size (>4cm) or age, were not found to be associated with increased risk. During the same period, THY3a cytology was reported in 53 patients, of whom 29 underwent diagnostic surgery and 4 patients were found to have a thyroid cancer (follicular, n=3 and medullary, n=1). CONCLUSION: One in five patients with features suspicious of a follicular neoplasm (THY3f) has a thyroid carcinoma. This risk is much lower for THY3a. This study reinforces the current recommendation for thyroid surgery in all patients with a reliable THY3f cytology, as no further stratifying risk factors could be identified.


Assuntos
Adenocarcinoma Folicular , Carcinoma Neuroendócrino , Neoplasias da Glândula Tireoide , Nódulo da Glândula Tireoide , Humanos , Masculino , Pessoa de Meia-Idade , Nódulo da Glândula Tireoide/diagnóstico , Nódulo da Glândula Tireoide/cirurgia , Nódulo da Glândula Tireoide/patologia , Neoplasias da Glândula Tireoide/diagnóstico , Neoplasias da Glândula Tireoide/cirurgia , Neoplasias da Glândula Tireoide/patologia , Radioisótopos do Iodo , Ultrassonografia , Adenocarcinoma Folicular/diagnóstico , Adenocarcinoma Folicular/cirurgia , Adenocarcinoma Folicular/patologia , Estudos Retrospectivos
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