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The static and dynamic properties of dendrimers in semidilute solutions of linear chains of comparable size are investigated using Brownian dynamics simulations. The radius of gyration and diffusivity of a wide variety of low generation dendrimers and linear chains in solution follow universal scaling laws independent of their topology. Analysis of the shape functions and internal density of dendrimers shows that they are more spherical than linear chains and have a dense core. At intermediate times, dendrimers become subdiffusive, with an exponent higher than that previously reported for nanoparticles in semidilute polymer solutions. The long-time diffusivity of dendrimers does not follow theoretical predictions for nanoparticles. We propose a new scaling law for the long-time diffusion coefficients of dendrimers which accounts for the fact that, unlike nanoparticles, dendrimers shrink with an increase in background solution concentration. Analysis of the properties of a special case of a higher functionality dendrimer shows a transition from polymer-like to nanoparticle-like behaviour.
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Owing to the unique 4f-5d transitions and the involvement of 5d electrons, the divalent europium (Eu2+) ion is extensively used as a dopant ion in luminescent materials for phosphor-converted light emitting diodes (pc-LEDs) and other technological applications. Earlier reports in most of the cases have shown that the reduction of Eu3+ to Eu2+ requires very high temperatures and large hydrogen flux. In this study, a co-doping strategy with higher valent U6+ ions was utilized to successfully stabilize Eu2+ ions in the Li2B4O7 (LTB) host with both the BO3 and BO4 network in low H2 flux of only 8%. It is postulated that charge transfer occurs from U to Eu, resulting in the reduction of the charged state of Eu and the reaction probably proceeds via the formation of paramagnetic transient [U5+-Eu3+] species in the co-doped LTB. The same is also believed to be facilitated by the enhanced formation of Li-O type vacancy clusters in co-doped samples and enhanced oxygen vacancies in a reducing atmosphere. We believe this work will pave a new pathway for stabilizing the unusual oxidation state of lanthanides and transition metal ions through co-doping with hexavalent uranium ions.
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BACKGROUND: Capsular contracture is the most common complication of breast augmentation and reconstruction. It occurs in up to 45% of patients and is theorized to occur secondary to an immune reaction. It can lead to pain, dissatisfaction with aesthetic outcomes, and reoperation. The gold standard for management is capsulectomy. Prior similar studies are limited by narrow inclusion criteria, single-surgeon analysis, small sample size, or univariate analysis. The goal of the following study is to prospectively identify possible risk factors for capsular contracture using a national database. METHODS: A retrospective review was conducted utilizing the National Surgical Quality Improvement Program (NSQIP) Database of prospectively collected data of patients undergoing periprosthetic and/or total capsulectomy for capsular contracture from 2013 to 2016. Odds ratios (OR) with 95% confidence intervals (CI) were calculated for variables using a multivariable binary logistic regression model. RESULTS: A total of 6547 patients underwent reconstructive or augmentation mammaplasty with a prosthetic implant, out of which 2543 (39%) underwent capsulectomy. Capsular contracture was more likely in older (OR: 1.10, 95% CI: 1.09-1.10, p<.001), overweight (OR: 1.12, 95% CI: 1.10-1.13, p<.001), and cancer patients (OR: 7.71, 95% CI: 2.22-28.8, p=0.001). Wound infection was associated with capsulectomy (OR: 6.69, 95% CI: 1.74-25.8, p<.001). CONCLUSION: These identified risk factors should be comprehensively addressed with patients during the informed consent process before breast augmentation or reconstruction with implants. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Implante Mamário , Implantes de Mama , Contratura , Mamoplastia , Feminino , Humanos , Idoso , Implantes de Mama/efeitos adversos , Melhoria de Qualidade , Seguimentos , Contratura Capsular em Implantes/epidemiologia , Contratura Capsular em Implantes/etiologia , Contratura Capsular em Implantes/cirurgia , Mamoplastia/efeitos adversos , Fatores de Risco , Estudos Retrospectivos , Contratura/epidemiologia , Contratura/etiologia , Contratura/cirurgia , Implante Mamário/efeitos adversosRESUMO
Chromatin is known to be organized into multiple domains of varying sizes and compaction. While these domains are often imagined as static structures, they are highly dynamic and show cell-to-cell variability. Since processes such as gene regulation and DNA replication occur in the context of these domains, it is important to understand their organization, fluctuation, and dynamics. To simulate chromatin domains, one requires knowledge of interaction strengths among chromatin segments. Here, we derive interaction-strength parameters from experimentally known contact maps and use them to predict chromatin organization and dynamics. Taking two domains on the human chromosome as examples, we investigate its three-dimensional organization, size/shape fluctuations, and dynamics of different segments within a domain, accounting for hydrodynamic effects. Considering different cell types, we quantify changes in interaction strengths and chromatin shape fluctuations in different epigenetic states. Perturbing the interaction strengths systematically, we further investigate how epigenetic-like changes can alter the spatio-temporal nature of the domains. Our results show that heterogeneous weak interactions are crucial in determining the organization of the domains. Computing effective stiffness and relaxation times, we investigate how perturbations in interactions affect the solid- and liquid-like nature of chromatin domains. Quantifying dynamics of chromatin segments within a domain, we show how the competition between polymer entropy and interaction energy influence the timescales of loop formation and maintenance of stable loops.
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Cromatina , Polímeros , Cromossomos , Entropia , Epigenômica , HumanosRESUMO
The Rouse model with internal friction (RIF), a widely used theoretical framework to interpret the effects of internal friction on conformational transitions in biomolecules, is shown to be an approximate treatment that is based on preaveraging internal friction. By comparison with Brownian dynamics simulations of an exact coarse-grained model that incorporates fluctuations in internal friction, the accuracy of the preaveraged model predictions is examined both at and away from equilibrium. While the two models predict intrachain autocorrelations that approach each other for long enough chain segments, they differ in their predictions for shorter segments. Furthermore, the two models differ qualitatively in their predictions for the chain extension and viscosity in shear flow, which is taken to represent a prototypical out-of-equilibrium condition.
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Simulação de Dinâmica Molecular , Polímeros , Fricção , Conformação Molecular , ViscosidadeRESUMO
ABSTRACT: Social distancing protocols during the COVID-19 pandemic have resulted in a rapid expansion of telemedicine. It has allowed patients to save time and money on clinic visits, and physicians to communicate with patients who live remotely. Telemedicine has also been valuable in plastic surgery during initial consultations, transfers, and follow up visits. However, given the often-sensitive nature of plastic surgery, the professionalism and expectations of telemedicine have to be reviewed. A comprehensive literature search of the MEDLINE, PubMed, Google Scholar, EMBASE, and Cochrane Central Register of Controlled Trials was conducted for studies published through October 2020 with multiple search terms related to telemedicine and its use in plastic surgery. Data on the effectiveness, challenges, and professionalism of telemedicine were collected. Our review suggests that telemedicine can be an effective mode of communication in many realms of plastic surgery, including cleft care and craniofacial deformities. However, many plastic surgeons are unfamiliar with the existing platforms, and there are no clear guidelines on the most optimal platforms. Physicians have to recognize that patients might have low digital health literacy or may not even possess digital device for telemedicine. There also needs to be an overall improvement in patient education. Given that telemedicine use will continue to increase after the COVID-19 pandemic, regulations on Health Insurance Portability and Accountability Act-compliant platforms and specific guidelines on telemedicine visits, such as undressing, chaperones, privacy matters, need to be established while maintaining a professional relationship between the patient and the physician.
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COVID-19 , Cirurgiões , Cirurgia Plástica , Telemedicina , Humanos , Motivação , Pandemias , SARS-CoV-2RESUMO
ABSTRACT: Deformity and tissue loss involving the craniomaxillofacial region occurs frequently as a result of trauma, oncologic resection, or a congenital malformation. In order to maximize the patient's quality of life, reconstruction of the craniomaxillofacial skeleton must seek to restore aesthetics as well as function. Advances in diagnostic technology, surgical technique, instrumentation, and innovative biomaterials used have transformed the way reconstructive surgeons approach their patients' needs. From the advent of alloplastic reconstruction, surgeons have sought the ideal material for use in craniomaxillofacial surgery. Substances such as metals, ceramics, glasses, and more recently resorbable polymers and bioactive materials have all been utilized.While autologous bone has remained widely-favored and the gold standard, synthetic alternatives remain a necessity when autologous reconstruction is not readily available. Today, alloplastic material, autografting via microvascular tissue transfer, hormone and growth factor-induced bone formation, and computer-aided design and manufacturing of biocompatible implants represent only a fraction of a wide range of options used in the reconstruction of the craniomaxillofacial skeleton. We present a brief review of the materials used in the repair of deformities of the craniomaxillofacial skeleton as well as a look into the potential future direction of the field.
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Implantes Dentários , Procedimentos de Cirurgia Plástica , Materiais Biocompatíveis , Estética Dentária , Humanos , Qualidade de VidaRESUMO
INTRODUCTION: With a following of over 825 million people, basketball currently ranks amongst the world's most popular sports. Despite a number of concussion awareness and player safety protocols that have been implemented at the professional level of organized play, a standardized, layperson-friendly algorithm for the acute management of basketball-related craniofacial injuries does not appear to presently exist. METHODS: This 10-year retrospective cohort study was conducted using the National Electronic Injury Surveillance System database to examine basketball-related craniofacial injuries from 2010 to 2019. Within the National Electronic Injury Surveillance System dataset, factors including patient age, gender, diagnosis, injury type, and injury location were included in our analysis. RESULTS: Overall, 22,529 basketball-related craniofacial injuries occurred between 2010 and 2019 in players ages 5 to 49âyears old. Adolescent (12-18-year-old) and young adult (19-34-year-old) age groups had the highest incidence of craniofacial injuries. The adolescent cohort experienced a significantly greater proportion of concussions and lower proportion of both facial lacerations and fractures compared with the within group null hypothesis of equal proportions (Pâ<â0.05). The young adult cohort experienced a significantly greater proportion of facial lacerations and fractures and lower proportion of concussions, contusions/abrasions, hematomas, and internal injuries compared to this cohort's null hypothesis (Pâ<â0.05). Males experienced a significantly greater proportion of fractures, lacerations, and dental injuries and lower proportion of concussions, contusions/abrasions, and internal injuries compared to the hypothesized equality of proportions (Pâ<â0.05). Females experienced a significantly greater proportion of concussions, contusions/abrasions, and internal injuries and lower proportion of fractures, lacerations, and dental injuries compared to the hypothesized equality of proportions (Pâ<â0.05). CONCLUSIONS: Although several steps have already been taken at the professional level to try to promote player safety, particularly with concussion protocols and prevention of lower extremity injuries, there remains a paucity of resources to guide management of other types of acute craniofacial injury. The role of layperson-friendly educational interventions remains intriguing as a potential means of improving outcomes regardless of socioeconomic status or health literacy. Additional studies still need to be completed to determine efficacy and best future direction.
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Traumatismos em Atletas , Basquetebol , Concussão Encefálica , Fraturas Ósseas , Adolescente , Adulto , Concussão Encefálica/diagnóstico , Concussão Encefálica/epidemiologia , Concussão Encefálica/terapia , Criança , Pré-Escolar , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Adulto JovemRESUMO
INTRODUCTION: Soccer is a global sport played by millions annually with an increasing popularity in the United States. Game is played by a wide range of participants from all ages and levels of competition. This scenario leads to a potential disparity in the injury profile based on quantifiable demographics. As the game continues to grow, injury detection and side-line assessment must change as well. METHODS: Utilizing a national injury database, a retrospective cohort study was conducted using 10 years of data collected from randomly selected emergency departments across the United States. Patient demographics, injury sites, and diagnosis were recorded. Diagnoses examined included concussion, contusion or abrasion, dental injury, fracture, hematoma, hemorrhage, internal injury, and laceration. RESULTS: Highest percentage of craniofacial injuries was observed in soccer players between the ages of 12 and 18. In ages 6 to 11 the most common injuries were contusions and dental injuries, with a significantly low number of fractures. Within the age group of 12 to 18 the highest percentage of injuries was concussions. Finally, the highest percentage of injury in the ages of 19 to 34 were fractures and lacerations. DISCUSSION: There is a shift in injury profile as the age of soccer players increases and the level of play becomes faster-paced. In youth players, there is a higher percentage of soft tissue injury. Older players are more likely to suffer a higher degree of injury including fractures, concussions, and lacerations. This suggests a great utility for a layperson-friendly educational intervention initiative applicable to all demographics for the sport of soccer.
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Traumatismos em Atletas , Concussão Encefálica , Fraturas Ósseas , Lacerações , Futebol , Adolescente , Traumatismos em Atletas/epidemiologia , Concussão Encefálica/epidemiologia , Criança , Humanos , Incidência , Lacerações/epidemiologia , Estudos Retrospectivos , Estados Unidos/epidemiologiaRESUMO
INTRODUCTION: Hockey is a sport of high speeds, projectiles, and slick surfaces. A scenario is ripe for craniofacial injuries. Annually, over 1 million Americans, with many more abroad participate in organized hockey. This number continues to grow at youth, amateur and professional levels. Following the characterization of groups with the highest incidence of hockey-related craniofacial injuries, our goal is to propose guidelines for the acute management of hockey-related craniofacial injuries in amateur settings. METHODS: This study follows a 10-year retrospective cohort design, examining hockey-related craniofacial injury data derived from the National Electronic Injury Surveillance System database. Within the NEISS data, patients were stratified by age, gender, and ethnicity to allow for analysis and comparison between groups. RESULTS: Sample data consisted of 2,544 hockey-related craniofacial injuries treated in US emergency departments between 2010 and 2019. Majority of the injuries included in this analysis involved patients within the 12-18-year-old age group (53.8%). Of the diagnoses, concussion was the most frequent hockey-related craniofacial injury (39.9%). Dental injuries represented the least (1%). In the 12 to 18 age group, the diagnoses concussion, fracture, and laceration differed significantly from the null hypothesis of equality of proportions across all injury types (Pâ<â0.05). Similarly, within the 19 to 34 age group, the diagnoses of concussion, fracture, laceration, and internal injury differed significantly from the null hypothesis of assumed equality of proportion (Pâ<â0.05). CONCLUSIONS: High incidence of hockey-related craniofacial injury among patients 12 to 18âyears of age signals a need for continued interventions targeted towards this age group. Increased sideline personnel training and education, as well as promoting a stricter adherence to established guidelines are integral parts of a greater strategy towards reducing injury incidence. Working towards reducing injuries and making participation in hockey safer, should be a goal as the sport continues to experience a historic rise in interest and participation.
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Traumatismos em Atletas , Concussão Encefálica , Hóquei , Patinação , Adolescente , Traumatismos em Atletas/epidemiologia , Criança , Humanos , Incidência , Estudos Retrospectivos , Estados UnidosRESUMO
BACKGROUND: Redundancy is mostly conceived as "waste" resulting from inefficient operations that ought to be eliminated. However, there are scholars who challenge this view and argue that redundancy is an essential element in facilitating reliable and safe operations in health care delivery processes. The ambiguity on redundancy has led to limited insights in health care settings. PURPOSE: This article seeks to provide clarity by investigating the conceptualization of redundancy within and across disparate contexts within hospital operations. DESIGN/METHODOLOGY/APPROACH: An exploratory study using different hospital departments was conducted in two large hospitals as case studies to allow for in-depth understanding of the conceptualization of redundancy across hospital departments. Data sources included 42 semistructured interviews, surveys, field notes from site observations, and document analysis. RESULTS/FINDINGS: The findings revealed alternative conceptualizations of redundancy, these being safety, care, heterogeneity, sustenance, and waste, and highlight their dominance in distinct hospital departments. The first four categories are positive in connotation, whereas the last, waste, has a negative connotation. Further, the analysis revealed that the conceptualization of redundancy is context dependent. CONCLUSION: Contrary to the general cognition of redundancy in the social science and management literature, our research found that redundancy might have a valuable role to play in core health care management concerns such as patient-centeredness, patient safety, and quality of care. This work is one of the first comprehensive studies on redundancy in the health care settings and is expected to steer scholarly conversations on redundancy in a more positive light. PRACTICAL IMPLICATIONS: Overall, this article serves as a call to health care operations decision makers and chiefs of hospitals to reexamine their current approach and management practices on redundancy.
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BACKGROUND: Reduction mammaplasty is a common procedure associated with a very high patient satisfaction rate. It has been shown to alleviate symptoms related to macromastia, such as back, neck, and shoulder pain, poor posture, bra strap grooving, paresthesia, and rashes. Despite the manifold benefits of reduction mammaplasty, some insurance companies require minimum resection weights of at least 500 g per breast in order to distinguish between a reconstructive and aesthetic procedure. OBJECTIVES: The aim of this study was to assess the origins of the 500-g rule used in reduction mammaplasty. METHODS: A comprehensive literature search of the MEDLINE, PubMed, Google Scholar, EMBASE, the Cochrane Central Register of Controlled Trials databases was conducted for studies published through July 2020 with multiple search terms related to resection weight criteria for breast reduction. Data on criteria, outcomes, and patient satisfaction were collected. RESULTS: A total of 14 articles were selected from the 27 articles that were identified. The 500-g rule appears to be arbitrary, and not based on any available hard evidence. However, numerous studies show that patients who have less than 500 g of tissue removed from each breast still experience significant symptomatic relief from reduction mammaplasty with a marked improvement in their quality of life. CONCLUSIONS: The 500-g rule should be re-evaluated as an insurance company criterion for authorizing reduction mammaplasty. The rule may influence surgeons to choose between form and function. Many additional patients might then benefit from this important procedure.
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Mamoplastia , Qualidade de Vida , Mama/cirurgia , Feminino , Humanos , Hipertrofia/cirurgia , Mamoplastia/efeitos adversos , Satisfação do PacienteRESUMO
The three-dimensional (3D) organization of chromatin, on the length scale of a few genes, is crucial in determining the functional state-accessibility and amount of gene expression-of the chromatin. Recent advances in chromosome conformation capture experiments provide partial information on the chromatin organization in a cell population, namely the contact count between any segment pairs, but not on the interaction strength that leads to these contact counts. However, given the contact matrix, determining the complete 3D organization of the whole chromatin polymer is an inverse problem. In this work, a novel inverse Brownian dynamics method based on a coarse-grained bead-spring chain model has been proposed to compute the optimal interaction strengths between different segments of chromatin such that the experimentally measured contact count probability constraints are satisfied. Applying this method to the α-globin gene locus in two different cell types, we predict the 3D organizations corresponding to active and repressed states of chromatin at the locus. We show that the average distance between any two segments of the region has a broad distribution and cannot be computed as a simple inverse relation based on the contact probability alone. The results presented for multiple normalization methods suggest that all measurable quantities may crucially depend on the nature of normalization. We argue that by experimentally measuring predicted quantities, one may infer the appropriate form of normalization.
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Cromatina , Cromossomos , Conformação Molecular , ProbabilidadeRESUMO
The industrialization of modern warfare dating back to WWI led to an increase in combat-related injuries with unprecedented levels of severity. The necessity of addressing the clinical challenges that ensued led to the emergence of modern reconstructive surgery and subsequently a robust healthcare initiative for veterans in the form of the Department of Veterans Affairs. In the following article, a literature review was conducted to examine the interplay between combat injuries, veterans' care, and reconstructive surgery. We found that the relationship between military trauma and reconstructive surgery has led to an increase in survival rates and advances in mass casualty response while allowing the survivors to maintain a high quality of life. The relationship between the Veterans Affairs hospitals and plastic surgery has only strengthened over time as these hospitals play a major role in training the next generation of plastic surgeons throughout the nation. It is imperative to maintain this cooperative relationship to ensure a high level of care for our veterans and a comprehensive training experience for plastic surgery residents.
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Procedimentos de Cirurgia Plástica , Cirurgia Plástica , Atenção à Saúde , Humanos , Militares , Qualidade de Vida , Sobreviventes , Estados Unidos , Lesões Relacionadas à Guerra , GuerraRESUMO
The universality of the swelling of the radius of gyration of a homopolymer relative to its value in the θ state, independent of polymer-solvent chemistry, in the crossover regime between θ and athermal solvent conditions, is well known. Here we study, by Brownian dynamics, a polymer model where a subset of monomers is labelled as "stickers". The mutual interaction of the stickers is more attractive than those of the other ("backbone") monomers, and has an additional important characteristic of "functionality" φ, i.e., the maximum number of stickers that can locally bind to a given sticker. A saturated bond formed in this manner remains bound until it breaks due to thermal fluctuations, a requirement which can be viewed as an additional Boolean degree of freedom that describes the bonding. This, in turn, makes the question of the order of the collapse transition a non-trivial one. Nevertheless, for the parameters that we have studied (in particular, φ = 1), we find a standard second-order θ collapse, using a renormalised solvent quality parameter that takes into account the increased average attraction due to the presence of stickers. We examine the swelling of the radius of gyration of such a sticky polymer relative to its value in the altered θ state, using a novel potential to model the various excluded volume interactions that occur between the monomers on the chain. We find that the swelling of such sticky polymers is identical to the universal swelling of homopolymers in the thermal crossover regime. Additionally, for our model, the Kuhn segment length under θ conditions is found to be the same for chains with and without stickers.
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A numerical simulation is presented to study the heat and flow characteristics of blood flow altered by electroosmosis through the tapered micro-vessels. Blood is assumed as non-Newtonian (micropolar) nanofluids. The flow regime is considered as asymmetric diverging (tapered) microchannel for more realistic micro-vessels which is produced by choosing the peristaltic wave train on the walls to have different amplitudes and phase. The Rosseland approximation is employed to model the radiation heat transfer and temperatures of the walls are presumed constants. The mathematical formulation of the present problem is simplified under the long-wavelength, low-Reynolds number and Debye-Hückel linearization approximations. The influence of various dominant physical parameters are discussed for axial velocity, microrotation distribution, thermal temperature distribution and nanoparticle volume fraction field. However, our foremost emphasis is to determine the effects of thermal radiation and coupling number on the axial velocity and microrotation distribution beneath electroosmotic environment. This analysis places a significant observation on the thermal radiation and coupling number which plays an influential role in hearten fluid velocity. This study is encouraged by exploring the nanofluid-dynamics in peristaltic transport as symbolized by heat transport in biological flows and also in novel pharmacodynamics pumps and gastro-intestinal motility enhancement.
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Simulação por Computador , Eletro-Osmose , Microvasos/fisiologia , Modelos Cardiovasculares , Temperatura , Velocidade do Fluxo Sanguíneo , Transferência de Energia , Humanos , Microvasos/anatomia & histologia , Análise Numérica Assistida por Computador , Peristaltismo , Fluxo Pulsátil , Fluxo Sanguíneo RegionalRESUMO
The effect of fluctuating internal viscosity and hydrodynamic interactions on a range of rheological properties of dilute polymer solutions is examined using a finitely extensible dumbbell model for a polymer. Brownian dynamics simulations are used to compute both transient and steady state viscometric functions in shear flow. The results enable a careful differentiation of the influence, on rheological properties, of solvent-mediated friction from that of a dissipative mechanism that is independent of solvent viscosity. In particular, hydrodynamic interactions have a significant influence on the magnitude of the stress jump at the inception of shear flow, and on the transient viscometric functions, but a negligible effect on the steady state viscometric functions at high shear rates. Zero-shear rate viscometric functions of free-draining dumbbells remain essentially independent of the internal viscosity parameter, as predicted by the Gaussian approximation, but the inclusion of hydrodynamic interactions induces a dependence on both the hydrodynamic interaction and the internal viscosity parameter. Large values of the internal viscosity parameter lead to linear viscoelastic predictions that mimic the behavior of rigid dumbbell solutions. On the other hand, steady-shear viscometric functions at high shear rates differ in general from those for rigid dumbbells, depending crucially on the finite extensibility of the dumbbell spring.
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BACKGROUND: Rhinoplasty is a popular aesthetic and reconstructive surgical procedure. It is one of the top five surgical cosmetic procedures performed worldwide. OBJECTIVES: To evaluate global trends in rhinoplasty research spanning 20 years between 1994 and 2013. METHODS: The top 15 plastic surgery and otolaryngology journals containing rhinoplasty research were determined using impact factors (IF). A database of rhinoplasty articles from 1994 to 2013 was created to include the following classifications: IF, authors' geographic location, study design, level of evidence (LOE), and pertinence to aesthetic or reconstructive rhinoplasty. Productivity index and productivity share were calculated for each region. RESULTS: A total of 1244 rhinoplasty articles were included in the database. The mean IF among the 15 journals increased from 0.75 in 1994 to 1.90 in 2013 (p < 0.001). The majority of rhinoplasty publications were clinical in study design (91.0%) and were predominantly of weaker LOE (level IV: 42.4%; level V: 33.2%). The USA led in proportion of total rhinoplasty publications by volume and productivity index (37.9%, 41.2%), followed by Asia (29.1%, 28.2%) and Western Europe (18.8%, 18.2%). The majority of articles published were classified as aesthetic (60.4%), whereas 30.6% were reconstructive; there was a significant increase in the proportion of aesthetic rhinoplasty articles published per year (p = 0.009). CONCLUSIONS: The USA has consistently been the most productive country in rhinoplasty research. However, its lead has diminished over the last 20 years. The trend in rhinoplasty research appears to be toward aesthetic rather than reconstructive topics. Attention should be given to producing stronger LOE studies. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Bibliometria , Pesquisa Biomédica/tendências , Editoração/estatística & dados numéricos , Rinoplastia , Humanos , Publicações Periódicas como Assunto , Fatores de TempoRESUMO
A library of seventeen novel 1,2,3-triazole derivatives were efficiently synthesized in excellent yields by the popular 'click chemistry' approach and evaluated in vitro for their anti-tubercular activity against Mycobacterium tuberculosis H37Ra (ATCC 25177 strain). Among the series, six compounds exhibited significant activity with minimum inhibitory concentration (MIC) values ranging from 3.12 to 0.78µg/mL and along with no significant cytotoxicity against MBMDMQs (mouse bone marrow derived macrophages). Molecular docking of the target compounds into the active site of DprE1 (Decaprenylphosphoryl-ß-d-ribose-2'-epimerase) enzyme revealed noteworthy information on the plausible binding interactions.