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A Stable Homoleptic Divinyl Tetrelene Series.

Chemistry 2021 Apr 13. Epub 2021 Apr 13.

University of Alberta, Deptm. of Chemistry, 11227 Saskatchewan Dr., T6G 2G2, Edmonton, CANADA.

The synthesis of the new bulky vinyllithium reagent (MeIPr=CH)Li, (MeIPr = [(MeCNDipp)2C]; Dipp = 2,6- iPr2C6H3 ) is reported. This vinyllithium precursor was found to act as a general source of the anionic 2σ, 2π-electron donor ligand [MeIPr=CH]- . Furthermore a high-yielding route to the degradation-resistant SiII  precursor MePr•SiBr2 is presented. Read More

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Synthesis of Tetrahedranes Containing the Unique Bridging Hetero-Dipnictogen Ligand EE' (E ≠ E' = P, As, Sb, Bi).

Chemistry 2021 Apr 12. Epub 2021 Apr 12.

University of Regensburg, Inorganic Chemistry, Universitätsstrasse 31, D-93040, Regensburg, GERMANY.

In order to improve and extend the rare class of tetrahedral mixed main group transition metal compounds, a new synthetic route for the complexes [{CpMo(CO) 2 } 2 (µ,η 2 :η 2 - PE )] (E = As ( 1 ), Sb ( 2 )) is described leading to higher yields and a decrease in reaction steps. Via this route, also the so far unknown heavier analogues containing AsSb ( 3a ), AsBi ( 4 ) and SbBi ( 5 ) ligands, respectively, are accessible. Single crystal X-ray diffraction experiments and DFT calculations reveal that they represent very rare examples of compounds comprising covalent bonds between two different heavy pnictogen atoms, which show multiple bond character and are stabilised without any organic substituents. Read More

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Insights Into the Evolutionary History of the Subfamily Orthotrichoideae (Orthotrichaceae, Bryophyta): New and Former Supra-Specific Taxa So Far Obscured by Prevailing Homoplasy.

Front Plant Sci 2021 26;12:629035. Epub 2021 Mar 26.

Centro de Investigación en Biodiversidad y Cambio Global, Madrid, Spain.

Mosses of the subfamily Orthotrichoideae represent one of the main components of the cryptogam epiphytic communities in temperate areas. During the last two decades, this taxonomical group has undergone an extensive revision that has led to its rearrangement at the generic level. However, their phylogenetic relationships and inferences on the evolutionary patterns that have driven the present diversity have little advanced. Read More

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Is surgery for serous cystic neoplasms of the pancreas still indicated? Sixteen years of experience at a high-volume center.

Pancreatology 2021 Apr 5. Epub 2021 Apr 5.

Department of Surgery, St. Josef Hospital, Ruhr University Bochum, Gudrunstr. 56, 44791, Bochum, Germany. Electronic address:

Background: Current guidelines discourage surgery for serous cystic neoplasms (SCN) of the pancreas, because of their benign character, slow growth, and excellent prognosis. Nevertheless, SCN continue to contribute up to 30% of resected cystic pancreatic lesions worldwide.

Methods: Spectrum of indications and outcomes of surgery were analysed in a retrospective series of 133 SCN at a single high-volume center in Germany between 2004 and 2019. Read More

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[Ballistic trauma of the face: A new scourge in Tunisia].

Ann Chir Plast Esthet 2021 Apr 7. Epub 2021 Apr 7.

Services d'oto-rhino-laryngologie, de chirurgie maxillo-faciale et d'ophtalmologie de l'hôpital militaire principal d'instruction de Tunis, Tunis, Tunisie.

Introduction: Ballistic trauma of the face has aroused growing interest since the proliferation of conflicts in the world and particularly in the fight against terrorism. Their polymorphous and disfiguring character, their particular evolution and prognosis due to the ballistic aetiology, differentiate them from classic maxillofacial trauma. Tunisia did not escape this scourge after the revolution of 2011, and must therefore face the challenge of ballistic trauma in general and of the face in particular. Read More

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[Complexity theory and the hypertensive patient].

Authors:
J Barochiner

Semergen 2021 Apr 6. Epub 2021 Apr 6.

Sección Hipertensión Arterial, Servicio de Clínica Médica, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina. Electronic address:

Hypertension is the main cause of death worldwide and the approach that the Family Physician makes of hypertensive patients, given his or her key role as a gateway to the health system, is a crucial determinant in their evolution. On the other hand, Complexity theory contributes to the understanding on how systems grow, adapt and evolve. The hypertensive patient, given his character of biological and social being, can be understood and approached as a complex system. Read More

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Thermally activated delayed fluorescence: A critical assessment of environmental effects on the singlet-triplet energy gap.

J Chem Phys 2021 Apr;154(13):134112

Department of Chemistry, Life Science and Environmental Sustainability, University of Parma, Parma, Italy.

The effective design of dyes optimized for thermally activated delayed fluorescence (TADF) requires the precise control of two tiny energies: the singlet-triplet gap, which has to be maintained within thermal energy, and the strength of spin-orbit coupling. A subtle interplay among low-energy excited states having dominant charge-transfer and local character then governs TADF efficiency, making models for environmental effects both crucial and challenging. The main message of this paper is a warning to the community of chemists, physicists, and material scientists working in the field: the adiabatic approximation implicitly imposed to the treatment of fast environmental degrees of freedom in quantum-classical and continuum solvation models leads to uncontrolled results. Read More

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Fit for work and life: an innovative concept to improve health and work ability of employees, integrating prevention, therapy and rehabilitation.

J Rehabil Med 2021 Mar 30. Epub 2021 Mar 30.

Department of Rehabilitation Medicine, Coordination Centre for Rehabilitation Research, Hannover Medical School, Carl-Neuberg-Str. 1, DE-30625 Hannover, Germany.

Objectives: To set up a comprehensive health programme for employees, with needs-based allocation to preventive and rehabilitative measures; and to evaluate the effects of the programme on work ability and sick leave.

Design: Prospective single-group observational study.

Methods: Employees of a university hospital were invited to participate in needs-based interventions of preventive or rehabilitative character. Read More

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Resolved phylogenetic relationships in the Ocotea complex (Supraocotea) facilitate phylogenetic classification and studies of character evolution.

Am J Bot 2021 Apr 5. Epub 2021 Apr 5.

Department of Ecology & Evolutionary Biology, Yale University, P.O. Box 208106, New Haven, Connecticut, 06520, USA.

Premise: The Ocotea complex contains the greatest diversity of Lauraceae in the Neotropics. However, the traditional taxonomy of the group has relied on only three main floral characters, and previous molecular analyses have used only a few markers and provided limited support for relationships among the major clades. This lack of useful data has hindered the development of a comprehensive classification, as well as studies of character evolution. Read More

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[Dialectic of hope in patients with a limited life expectancy. Ethical and narrative aspects].

Cuad Bioet 2021 Jan-Apr;32(104):49-59

Universidad de A Coruña. Área de Filosofía del Derecho.Facultad de Derecho. Campus de Elviña, s/n. 15071 La Coruña Spain. 0034981167000-1523

The patient's right to know his/her clinical information corresponds with the duty of the health care professional, especially the physician responsible for his/her care, to provide it. However, in the case of patients whose life prognosis is limited, this presents several difficulties. Determining the content of this right is complicated because it depends on the circumstances. Read More

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November 2020

Designing the Composition of Cement-Stabilized Rammed Earth with the Association Analysis Application.

Materials (Basel) 2021 Mar 12;14(6). Epub 2021 Mar 12.

Institute of Construction Engineering, Faculty of Civil Engineering, Warsaw University of Technology, 00-637 Warsaw, Poland.

The main advantage of the structural composite material known as cement-stabilized rammed earth (CSRE) is that it can be formulated as a sustainable and cost-saving solution. The use of the aggregates collected very close to a construction site allows economizing on transportation costs. Another factor that makes sustainability higher and the costs lower is a small addition of cement to the CSRE in comparison to the regular concrete. Read More

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Enhanced Regeneration of Vascularized Adipose Tissue with Dual 3D-Printed Elastic Polymer/dECM Hydrogel Complex.

Int J Mol Sci 2021 Mar 12;22(6). Epub 2021 Mar 12.

Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Korea.

A flexible and bioactive scaffold for adipose tissue engineering was fabricated and evaluated by dual nozzle three-dimensional printing. A highly elastic poly (L-lactide-co-ε-caprolactone) (PLCL) copolymer, which acted as the main scaffolding, and human adipose tissue derived decellularized extracellular matrix (dECM) hydrogels were used as the printing inks to form the scaffolds. To prepare the three-dimensional (3D) scaffolds, the PLCL co-polymer was printed with a hot melting extruder system while retaining its physical character, similar to adipose tissue, which is beneficial for regeneration. Read More

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Comparison of the Dielectric Properties of Ecoflex with L,D-Poly(Lactic Acid) or Polycaprolactone in the Presence of SWCN or 5CB.

Materials (Basel) 2021 Mar 31;14(7). Epub 2021 Mar 31.

Institute of Physics, Jagiellonian University, S. Lojasiewicza 11, 30-348 Krakow, Poland.

The main goal of this paper was to study the dielectric properties of hybrid binary and ternary composites based on biodegradable polymer Ecoflex, single walled carbon nanotubes (SWCN), and liquid crystalline 4'-pentyl-4-biphenylcarbonitrile (5CB) compound. The obtained results were compared with other created analogically to Ecoflex, hybrid layers based on biodegradable polymers such as L,D-polylactide (L,D-PLA) and polycaprolactone (PCL). Frequency domain dielectric spectroscopy (FDDS) results were analyzed taking into consideration the amount of SWCN, frequency, and temperature. Read More

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Surface Finish Analysis in Single Point Incremental Sheet Forming of Rib-Stiffened 2024-T3 and 7075-T6 Alclad Aluminium Alloy Panels.

Materials (Basel) 2021 Mar 27;14(7). Epub 2021 Mar 27.

Faculty of Mechanical and Electrical Engineering, Polish Naval Academy, ul. Śmidowicza 69, 81-127 Gdynia, Poland.

The article presents the results of the analysis of the interactions between the single point incremental forming (SPIF) process parameters and the main roughness parameters of stiffened ribs fabricated in Alclad aluminium alloy panels. EN AW-7075-T6 and EN AW-2024-T3 Alclad aluminium alloy sheets were used as the research material. Panels with longitudinal ribs were produced with different values of incremental vertical step size and tool rotational speed. Read More

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Naturally Occurring Ecdysteroids in L. and Evaluation of Fenarimol as a Potential Inhibitor of Their Biosynthesis in Plants.

Int J Mol Sci 2021 Mar 11;22(6). Epub 2021 Mar 11.

Department of Bioenergetics, Food Analysis and Microbiology, Institute of Food Technology and Nutrition, College of Natural Science, Rzeszow University, Ćwiklińskiej 2D, 35-601 Rzeszow, Poland.

Ecdysteroids (ECs) are steroid hormones originally found in the animal kingdom where they function as insect molting hormones. Interestingly, a relatively high number of these substances can also be formed in plant cells. Moreover, ECs have certain regulatory effects on plant physiology, but their role in plants still requires further study. Read More

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The emotion storyboard: A method to examine social judgments of emotion.

PLoS One 2021 2;16(4):e0249294. Epub 2021 Apr 2.

Department of Psychology, The Pennsylvania State University, University Park, Pennsylvania, United States of America.

As perceivers, we need to understand context to make social judgments about emotion, such as judging whether emotion is appropriate. We propose a graphic novel-like method, the emotion storyboard, for use in research on social judgments of emotion. Across two studies, participants were randomly assigned to read emotion storyboards or written vignettes to compare the efficacy of the emotion storyboard to that of vignettes in studies on social judgments of emotion. Read More

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Molecular phylogeny, biogeography and character evolution of the montane genus Juss. (Bignoniaceae).

Plant Divers 2021 Feb 22;43(1):1-14. Epub 2020 Sep 22.

CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.

The complex orogeny of the Himalaya and the Qinghai-Tibet Plateau (QTP) fosters habitat fragmentation that drives morphological differentiation of mountain plant species. Consequently, determining phylogenetic relationships between plant subgenera using morphological characters is unreliable. Therefore, we used both molecular phylogeny and historical biogeographic analysis to infer the ancestral states of several vegetative and reproductive characters of the montane genus . Read More

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February 2021

Collective behavior of thermophoretic dimeric active colloids in three-dimensional bulk.

Eur Phys J E Soft Matter 2021 Mar 27;44(3):43. Epub 2021 Mar 27.

Theoretical Physics of Living Matter, Institute of Biological Information Processing, Forschungszentrum Jülich, 52425, Jülich, Germany.

Colloids driven by phoresis constitute one of the main avenues for the design of synthetic microswimmers. For these swimmers, the specific form of the phoretic and hydrodynamic interactions dramatically influences their dynamics. Explicit solvent simulations allow the investigation of the different behaviors of dimeric Janus active colloids. Read More

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Population genomics of Mediterranean oat (A. sativa) reveals high genetic diversity and three loci for heading date.

Theor Appl Genet 2021 Mar 26. Epub 2021 Mar 26.

Institute for Sustainable Agriculture, CSIC, Avenida Menéndez Pidal, 14004, Córdoba, Spain.

Key Message: Genomic analysis of Mediterranean oats reveals high genetic diversity and three loci for adaptation to this environment. This information together with phenotyping and passport data, gathered in an interactive map, will be a vital resource for oat genetic improvement. During the twentieth century, oat landraces have increasingly been replaced by modern cultivars, resulting in loss of genetic diversity. Read More

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Metal Toxicity and Speciation: A Review.

Curr Med Chem 2021 Mar 24. Epub 2021 Mar 24.

Department of Chemistry and Pharmacy, University of Sassari. Italy.

Background: Essential metal ions play a specific and fundamental role in human metabolism. Their homeostasis is finely tuned and any concentration imbalance in form of deficiency or excess could lead to a progressive reduction and failure of normal biological function, to severe physiological and clinical outcomes till death. Conversely, non-essential metals are not necessary for life and only noxious effects could arise after their exposure. Read More

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Megacraniinae-The Palm Stick Insects: A new subfamily of Old World Phasmatodea and a redefinition of Platycraninae Brunner v. Wattenwyl, 1893 (Phasmatodea: "Anareolatae").

Zootaxa 2020 Dec 21;4896(2):zootaxa.4896.2.1. Epub 2020 Dec 21.

Tannenwaldallee 53, 61348 Bad Homburg Germany..

The subfamily Platycraninae Brunner v. Wattenwyl, 1893 is polyphyletic in the traditional treatment. None of the genera attributed to the subfamily is closely related to the type-genus Platycrana Gray, 1835, which has already been suggested by morphological studies. Read More

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December 2020

Machine Learning Algorithm Guiding Local Treatment Decisions to Reduce Pain for Lung Cancer Patients with Bone Metastases, a Prospective Cohort Study.

Pain Ther 2021 Mar 19. Epub 2021 Mar 19.

Department of Internal Oncology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai, People's Republic of China.

Introduction: As life expectancy increases for lung cancer patients with bone metastases, the need for personalized local treatment to reduce pain is expanding.

Methods: Patients were treated by a multidisciplinary team (MDT), and local treatment including surgery, percutaneous osteoplasty, or radiation. Visual analog scale (VAS) and quality of life (QoL) scores were analyzed. Read More

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PAH source differentiation between historical MGP and significant urban influences for sediments in San Francisco Bay.

Mar Pollut Bull 2021 Mar 15;166:112248. Epub 2021 Mar 15.

Haley & Aldrich, Inc., 5333 Mission Center Rd., Suite 300, San Diego, CA 92108, USA. Electronic address:

A forensic source evaluation of polycyclic aromatic hydrocarbons (PAHs) in nearshore sediments in San Francisco Bay examined total PAH greater than ambient concentrations in sediments, and potential pyrogenic source relationships with respect to PAH compounds typically associated with point and nonpoint pyrogenic source types, including PAHs potentially associated with historical manufactured gas plant (MGP) operations. Diagnostic source ratio analysis was employed for determination of potential PAH source relationships. A two-model approach indicated distinct potential source signatures, as identified from the distributions of higher PAH concentrations in some sediments. Read More

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The impact of seed micromorphology in the subgeneric classification of the genus Reseda L. (Resedaceae) in Turkey.

Microsc Res Tech 2021 Mar 17. Epub 2021 Mar 17.

Faculty of Science, Department of Biology, Hacettepe University, Ankara, Turkey.

Seed micromorphology of 18 taxa belonging to the genus Reseda (Resedaceae) in Turkey were investigated with scanning electron microscopy (SEM), in order to understand and check its diagnostic significance at subgeneric and sectional level. Seeds of Reseda species were photographed to evaluate different characteristics including appearance of the seed, testa ornamentation and the existence of carunculoid tissue at hilum regions. In addition, cluster analysis and principal component analysis (PCA) were performed to test whether the micromorphological data of the related taxa is compatible with the current classification of the genus. Read More

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Perspectives of key stakeholders on essential virtues for good scientific practice in research areas.

Account Res 2021 Mar 10. Epub 2021 Mar 10.

Department of Research in Biomedicine in Health, University of Split School of Medicine, Split, Croatia.

In contrast to the principle-based approach to ethics and research integrity (ERI) training, which stresses the importance of following moral rules, the virtue-based approach focuses on developing good character traits. This study has aimed to explore what virtues mean in scientific practice and their suitable place in ERI training, using a qualitative approach. Two face-to-face focus group discussions were conducted with 21 participants. Read More

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Spatial organization of Dps and DNA-Dps complexes.

J Mol Biol 2021 Mar 11;433(10):166930. Epub 2021 Mar 11.

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy prospekt, Moscow 119071, Russia.

DNA co-crystallization with Dps family proteins is a fundamental mechanism, which preserves DNA in bacteria from harsh conditions. Though many aspects of this phenomenon are well characterized, the spatial organization of DNA in DNA-Dps co-crystals is not completely understood, and existing models need further clarification. To advance in this problem we have utilized atomic force microscopy (AFM) as the main structural tool, and small-angle X-scattering (SAXS) to characterize Dps as a key component of the DNA-protein complex. Read More

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Covalent and non-covalent binding free energy calculations for peptidomimetic inhibitors of SARS-CoV-2 main protease.

Phys Chem Chem Phys 2021 Mar 12;23(11):6746-6757. Epub 2021 Mar 12.

Department of Chemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada.

COVID-19, the disease caused by the newly discovered coronavirus-SARS-CoV-2, has created a global health, social, and economic crisis. As of mid-January 2021, there are over 90 million confirmed cases and more than 2 million reported deaths due to COVID-19. Currently, there are very limited therapeutics for the treatment or prevention of COVID-19. Read More

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Burnout among Iranian medical students: Prevalence and its relationship to personality dimensions and physical activity.

Authors:
Mohsen Khosravi

Eur J Transl Myol 2021 Feb 5. Epub 2021 Feb 5.

Department of Psychiatry and Clinical Psychology, Zahedan University of Medical Sciences, Zahedan.

Several studies have shown the association between personality traits and academic burnout. But the main goal of the present study was to find out an experimental answer to the following question: Does the relationship between personality dimensions and academic burnout is a simple relationship or physical activity can influence this relationship. In this cross-sectional correlational study, 417 medical students were selected from three major cities of Iran through stratified multistage sampling and assessed by demographic information form, Baecke Physical Activity Questionnaire, Temperament and Character Inventory, and Breso's Academic Burnout Questionnaire. Read More

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February 2021

A Woman with a 27-Year History of Hyperparathyroidism and Hypercalcemia Who Was Diagnosed with Low-Grade Parathyroid Carcinoma.

Am J Case Rep 2021 Mar 11;22:e930301. Epub 2021 Mar 11.

Department of General, Endocrine and Vascular Surgery, Medical University of Warsaw, Warsaw, Poland.

BACKGROUND Parathyroid carcinoma (PC), accounting for 0.005% of all cancers, is responsible for less than 1% of all cases of primary hyperparathyroidism, and equally affects males and females, usually in 4th or 5th decades of life. PC can occur sporadically and can be associated with congenital genetic syndromes such as hyperparathyroidism-jaw tumor syndrome (HPT-JT), isolated familial hyperparathyroidism, or multiple endocrine neoplasia 1 and 2 syndromes. Read More

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Effectiveness of the Advanced Practice Nursing interventions in the patient with heart failure: A systematic review.

Nurs Open 2021 Mar 10. Epub 2021 Mar 10.

Centro Universitario de Enfermería de Cruz Roja, Universidad de Sevilla, Sevilla, Spain.

Rationale And Aim: Advanced Practice Nurse (APN) is a specialist who has acquired clinical skills to make complex decisions for a better professional practice. In the United States, this figure has been developed in different ways, but in some European countries, it is not yet fully developed, although it may imply a significant advance in terms of continuity and quality of care in patients with chronic or multiple pathologies, including cardiac ones and, more specifically, heart failure (HF). The follow-up of HF patients in many countries has focused on the medical management of the process, neglecting all the other comprehensive health aspects that contribute to decompensation of HF, worsening quality indicators or patient satisfaction, and there are not updated reviews to clarify the relevance of APN in HF, comparing the results of APN interventions with doctors clinical practice, since the complexity of care that HF patients need makes it difficult to control the disease through regular treatment. Read More

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