PVC/CNT Electrospun Composites: Morphology and Thermal and Impedance Behavior.

Due to their mechanical robustness and chemical resistance, composite electrospun membranes based on polyvinyl chloride (PVC) are suitable for sensor applications. Aiming to improve the electrical characteristics of these membranes, this work investigated the effects of the addition of carbon nanotubes (CNTs) to PVC electrospun membranes, in terms of morphology and thermal and impedance behavior. Transmission electron microscopy images evidenced that most of the nanotubes were encapsulated within the fibers and oriented along them, while field-emission scanning electron micrographs revealed that the membranes consisted of uniform fibers with an average diameter of 339 ± 31 nm, regardless of the addition of the carbon nanotubes. With respect to the neat resin, the addition of nanotubes caused a significant lowering of the glass transition temperature (up to 20 °C) and a marked change in the second degradation step of PVC. Nyquist plots from electrical impedance spectra showed a charge transfer resistance (RCT) of 38 and 40 MΩ for neat PVC and PVC/CNT 3 wt.% membranes, respectively, indicating that, in the dry state, the encapsulation of CNTs in the fibers and the high porosity of the membranes prevented the formation of a percolation network, increasing the electrical resistance. In the wet state, however, there was a greater change in the impedance behavior, decreasing the resistance RCT to 4.5 and 1.1 MΩ, for neat PVC and PVC/CNT 3 wt.% membranes, respectively. The results of this study, showing a significant variation in impedance behavior between dry and wet membranes, are relevant for the development of various types of sensors based on PVC composites.

LP-118 is a novel B-cell lymphoma 2 / extra-large inhibitor that demonstrates efficacy in models of venetoclax-resistant chronic lymphocytic leukemia.

Patients with chronic lymphocytic leukemia (CLL) respond well to initial treatment with the Bcell lymphoma 2 (BCL2) inhibitor venetoclax. Upon relapse, they often retain sensitivity to BCL2 targeting, but durability of response remains a concern. We hypothesize that targeting both BCL2 and B-cell lymphoma-extra large (BCLXL) will be a successful strategy to treat CLL, including for patients who relapse on venetoclax. To test this hypothesis, we conducted a pre-clinical investigation of LP-118, a highly potent inhibitor of BCL2 with moderate BCLXL inhibition to minimize platelet toxicity. This study demonstrated that LP-118 induces efficient BAK activation, cytochrome C release, and apoptosis in both venetoclax naïve and resistant CLL cells. Significantly, LP-118 is effective in cell lines expressing the BCL2 G101V mutation and in cells expressing BCLXL but lacking BCL2 dependence. Using an immunocompetent mouse model, Eµ-TCL1, LP-118 demonstrates low platelet toxicity, which hampered earlier BCLXL inhibitors. Finally, LP-118 in the RS4;11 and OSU-CLL xenograft models results in decreases in tumor burden and survival advantage, respectively. These results provide a mechanistic rationale for the evaluation of LP-118 for the treatment of venetoclax responsive and relapsed CLL.

Case-Based Specialty Training for Medical Students to Elicit Social Determinants of Health.

Introduction: Without explicit education and training on how social determinants of health (SDoH) impact patient care and health outcomes, medical schools are failing to effectively equip future physicians to serve their patients. We created this workshop on health equity with a focus on SDoH to help students more effectively communicate with diverse populations. Methods: Third-year medical students and faculty were provided with class guides, learning objectives, role-play vignettes containing clerkship-specific history and physical exams, schedules, and discussion questions during a 2-hour session centered on SDoH. The workshop's impact was measured through mixed-methods analysis of surveys. Results: Based on pre- and postsurvey results from 87 participants, medical students strongly agreed that (1) SDoH factor more into a patient's health outcomes than the clinical encounter (pre: 67%, post: 87%), (2) it is their duty to gather information about SDoH (pre: 86%, post: 97%), (3) neighborhood safety is one of the key SDoH (pre: 88%, post: 97%), (4) they understood the impact of upstream interventions (pre: 35%, post: 93%), (5) they could efficiently screen all patients for SDoH at every medical encounter (pre: 27%, post: 86%), and (6) they could find preliminary resources to quickly assist patients in need of help regarding particular SDoH (pre: 26%, post: 85%). Discussion: This was the first iteration of this workshop; challenges involved piloting the content, time restraints, and organizational structure of the workshop design. Future directions include making SDoH curricula an integral part of undergraduate medical education and diverse clinical environments.

Designing Prefaculty Competencies for Diverse Learners Through a Modified Delphi Process.

Importance: Faculty diversity in academic medicine may better prepare the next generation of equity-minded health care practitioners and leaders. Prefaculty development is an emerging concept to support trainees in achieving key knowledge, skills, and experiences to become successful faculty. Objective: To outline competencies, with corresponding milestones, to support the academic career development of learners, inclusive of racial, ethnic, sexual, and gender identities minoritized in medicine. Design, Setting, and Participants: Using a modified Delphi process, a national working group consisting of 13 members was established. The group used the published literature and listening sessions with diverse stakeholders to draft a set of competencies and milestones in July 2022. Diverse expert panelists reviewed the draft set over 2 rounds between September 2022 and January 2023. The group considered qualitative data to further refine the draft set between rounds. Consensus was reached when competencies and milestones were rated as agree or strongly agree on importance or appropriateness by 75% or greater of expert panelists after the second round. A final set of competencies and milestones was generated in February 2023. Data from round 1 were analyzed in October 2022 and data from round 2 were analyzed in January 2023. Main Outcomes and Measures: The development of prefaculty competencies with corresponding milestones by expert panel rankings and comments. Results: The national working group consisted of 13 members who represented diversity across racial, ethnic, and gender identities and academic and career tracks. The working group developed an initial set of 36 competencies and corresponding milestones across 12 domains. After 2 rounds, consensus among 46 expert panelists generated a final list of 32 competencies with corresponding milestones across 11 domains. A total of 26 panelists (56.5%) were women, 11 (23.9%) were Black or African American, 17 (37.0%) were Latina/o/x/e, Hispanic, or of Spanish origin, and 10 (21.7%) were White. Competency domains were divided into 2 groups: foundational (academic career choice and professional identity, mentorship, networking, financial skills, diversity and inclusion, personal effectiveness and self-efficacy, and leadership) and focused (education, community engagement, research, and clinical medicine). Consensus for inclusion or elimination of items was greater than 90% between the 2 rounds. Conclusions and Relevance: There was consensus among the working group and expert panelists regarding the importance and appropriateness of the competencies and milestones for diverse trainees to successfully obtain faculty positions. Institutions and national organizations can use these competencies as a framework to develop curricula that support diverse learners' career development toward academia.

Risk of Severe Acute Respiratory Syndrome Coronavirus 2 Infection Following Prior Infection or Vaccination.

BACKGROUND: The extent to which infection versus vaccination has conferred similarly durable severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) immunity during the Omicron era remains unclear. METHODS: In a cohort of 4496 adults under continued serological surveillance throughout the first year of Omicron-predominant SARS-CoV-2 transmission, we examined incidence of new infection among individuals whose last known antigenic exposure was either recent (<90 days) or remote (≥90 days) infection or vaccination. RESULTS: We adjudicated 2053 new-onset infections occurring between 15 December 2021 through 22 December 2022. In multivariable-adjusted analyses, compared to individuals whose last known exposure was remote vaccination, those with recent vaccination (odds ratio [OR], 0.82 [95% confidence interval {CI}, .73-.93]; P = .002) or recent infection (OR, 0.14 [95% CI, .05-.45]; P = .001) had lower risk for new infection within the subsequent 90-day period. Given a significant age interaction (P = .004), we found that remote infection compared to remote vaccination was associated with significantly greater new infection risk in persons aged ≥60 years (OR, 1.88 [95% CI, 1.13-3.14]; P = .015) with no difference seen in those <60 years (1.03 [95% CI, .69-1.53]; P = .88). CONCLUSIONS: During the initial year of Omicron, prior infection and vaccination both offered protection against new infection. However, remote prior infection was less protective than remote vaccination for individuals aged ≥60 years. In older adults, immunity gained from vaccination appeared more durable than immunity gained from infection.

La pandemia COVID-19 y la administración de la salud: el caso de la región Puno / The COVID-19 pandemic and health administration: the case of the Puno Regione / A pandemia de COVID-19 e a administração da saúde: o caso da região de Puno

El objetivo de la investigación fue analizar el impacto de la pandemia del COVID-19 en la administración de los servicios de salud y en la atención al paciente, caso de la región Puno, reflejados en los indicadores del sistema de gestión de calidad en cuanto al manejo de recursos desde los distintos puntos o pilares elementales dentro de la administración de salud. Materiales y métodos. se amparó bajo una investigación documental observacional con diseño de análisis descriptivo. La muestra proviene de un análisis que se llevó a cabo en 31 indicadores de actividad (IA) pertenecientes a 7 áreas del Servicio. En su mayoría, estos indicadores experimentaron un aumento tanto en marzo (20%) como en abril (25%). Conclusiones: indican que se observó un incremento en los ensayos clínicos relacionados con el tratamiento del SAR-Cov-2, los cuales abarcaron las unidades de cuidados intensivos (UCI) y las salas de urgencias (SU). Esto incluyó la dispensación de dosis individuales y el inicio y preparación de las salas de urgencias.

The objective of the research was to analyze the impact of the COVID-19 pandemic on the administration of health services and patient care, in the case of the Puno region, as reflected in the indicators of the quality management system in terms of resource management from the different points or elemental pillars within the health administration. Materials and methods. was based on an observational documentary research with a descriptive analysis design. The sample comes from an analysis carried out on 31 activity indicators (AI) belonging to 7 areas of the Service. Most of these indicators experienced an increase in both March (20%) and April (25%). Conclusions indicate that an increase was observed in clinical trials related to SAR-Cov-2 treatment, which spanned intensive care units (ICU) and emergency rooms (ED). This included single-dose dispensing and ED initiation and preparation.

O objetivo da investigação foi analisar o impacto da pandemia da COVID-19 na administração dos serviços de saúde e na assistência aos doentes na região de Puno, tal como se reflecte nos indicadores do sistema de gestão da qualidade em termos de gestão de recursos a partir dos diferentes pontos ou pilares básicos da administração da saúde. Materiais e métodos. baseou-se numa investigação documental observacional com um desenho de análise descritiva. A amostra provém de uma análise efectuada sobre 31 indicadores de atividade (IA) pertencentes a 7 áreas do Serviço. A maioria destes indicadores registou um aumento tanto em março (20%) como em abril (25%). Conclusões. indicam que houve um aumento dos ensaios clínicos relacionados com o tratamento do SAR-Cov-2, que abrangeu as unidades de cuidados intensivos (UCI) e os serviços de urgência (SU). Isto incluiu a distribuição de doses únicas e a iniciação e preparação de EDs.

Targeting PELP1 oncogenic signaling in TNBC with the small molecule inhibitor SMIP34.

PURPOSE: Triple-negative breast cancer (TNBC) is the most aggressive subtype of breast cancer. Oncogenic PELP1 is frequently overexpressed in TNBC, and it has been demonstrated that PELP1 signaling is essential for TNBC progression. The therapeutic utility of targeting PELP1 in TNBC, however, remains unknown. In this study, we investigated the effectiveness of SMIP34, a recently developed PELP1 inhibitor for the treatment of TNBC. METHODS: To ascertain the impact of SMIP34 treatment, we used seven different TNBC models for testing cell viability, colony formation, invasion, apoptosis, and cell cycle analysis. Western blotting and RT-qPCR were used to determine the mechanistic insights of SMIP34 action. Using xenograft and PDX tumors, the ability of SMIP34 in suppressing proliferation was examined both ex vivo and in vivo. RESULTS: TNBC cells' viability, colony formation, and invasiveness were all decreased by SMIP34 in in vitro cell-based assays, while apoptosis was increased. SMIP34 treatment promoted the degradation of PELP1 through the proteasome pathway. RT-qPCR analyses confirmed that SMIP34 treatment downregulated PELP1 target genes. Further, SMIP34 treatment substantially downregulated PELP1 mediated extranuclear signaling including ERK, mTOR, S6 and 4EBP1. Mechanistic studies confirmed downregulation of PELP1 mediated ribosomal biogenesis functions including downregulation of cMyc and Rix complex proteins LAS1L, TEX-10, and SENP3. The proliferation of TNBC tumor tissues was decreased in explant experiments by SMIP34. Additionally, SMIP34 treatment markedly decreased tumor progression in both TNBC xenograft and PDX models. CONCLUSIONS: Together, these findings from in vitro, ex vivo, and in vivo models show that SMIP34 may be a useful therapeutic agent for inhibiting PELP1 signaling in TNBC.

Melanoma: Does It Present Differently in Darker Skin Tones?

Introduction: There are vast differences in clinical presentations of melanoma across skin tones. Individuals with darker skin tones tend to have a higher prevalence of advanced-stage melanoma, which correlates with increased mortality. We designed this interactive workshop to increase nursing and medical trainees' awareness of the epidemiology, prevention, and treatment of melanoma in individuals of darker skin tones. Methods: The Kern model was used in the design, implementation, and evaluation of the workshop. The 75-minute workshop consisted of a PowerPoint presentation, video-based reflection activities, and case studies. Evaluation consisted of pre- and postworkshop questionnaires. The workshop was implemented two times among 63 nursing students, 11 medical students/residents, and six medical faculty. Results: Seventy-one participants completed the pre- and postworkshop evaluations. A comparison of pre- and postworkshop responses utilizing the Wilcoxon matched-pair signed rank test showed a statistically significant increase in learners' confidence to address each learning objective. Discussion: Through this interactive educational presentation, medical and nursing trainees can gain heightened awareness of melanoma across various skin tones, especially unique presentations in darker skin tones.

Office of Diversity, Equity, and Inclusion: Engagement and Leadership Opportunities for Trainees.

Introduction: To achieve a healthier future for all, improving diversity through efforts such as diversifying faculty and leadership in academic medicine is imperative. Therefore, medical trainees (medical students, residents, fellows) from groups underrepresented in medicine (UiM) are encouraged to pursue academic careers and have opportunities to gain faculty leadership skills during their training. Trainees also need exposure to the leadership positions within various offices of an academic institution such as the Office of Diversity, Equity, and Inclusion (DEI). The goal of this module is to expose UiM trainees to the Office of DEI and leadership competencies that can be obtained via service and leadership opportunities with it. Methods: The Kern model was used in the development, implementation, and evaluation of this 75-minute workshop. The workshop consisted of a PowerPoint presentation, reflection exercises, and case discussion to raise trainees' awareness of the Office of DEI and opportunities to become engaged with and develop faculty leadership competencies through the office. Results: Sixty-six diverse learners across three sites completed pre- and postworkshop surveys. Ninety-five percent of participants agreed or strongly agreed that the learning objectives of the workshop had been met. Discussion: Overall, this interactive workshop facilitated learners' awareness of the responsibilities of the Office of DEI and opportunities for learners to develop faculty leadership competencies through engagement. Although primarily evaluated among medical students, the module can be of use to learners and faculty of other health professions programs with an Office of DEI.

Primary adrenal insufficiency masking as an adrenal B-cell lymphoma.

We report here a woman in her 70s presenting with adrenal insufficiency secondary to a primary adrenal lymphoma. The patient had a previous history of aphthous ulcers on dexamethasone and was referred to endocrinology with symptoms of fatigue and orthostasis. Subsequent Cosyntropin stimulation showed primary adrenal insufficiency and adrenal CT demonstrated large infiltrative masses. Adrenal biopsy confirmed the diagnosis of primary adrenal lymphoma of the B-cell type. This case demonstrates the importance of including lymphoma in the differential diagnosis of adrenal insufficiency, particularly in the elderly population and in the setting of negative 21-hydroxlyase antibody results.

A First-in-Class Inhibitor of ER Coregulator PELP1 Targets ER+ Breast Cancer.

Most patients with estrogen receptor alpha-positive (ER+) breast cancers initially respond to treatment but eventually develop therapy resistance with disease progression. Overexpression of oncogenic ER coregulators, including proline, glutamic acid, and leucine-rich protein 1 (PELP1), are implicated in breast cancer progression. The lack of small molecules that inhibits PELP1 represents a major knowledge gap. Here, using a yeast-two-hybrid screen, we identified novel peptide inhibitors of PELP1 (PIP). Biochemical assays demonstrated that one of these peptides, PIP1, directly interacted with PELP1 to block PELP1 oncogenic functions. Computational modeling of PIP1 revealed key residues contributing to its activity and facilitated the development of a small-molecule inhibitor of PELP1, SMIP34, and further analyses confirmed that SMIP34 directly bound to PELP1. In breast cancer cells, SMIP34 reduced cell growth in a dose-dependent manner. SMIP34 inhibited proliferation of not only wild-type (WT) but also mutant (MT) ER+ and therapy-resistant breast cancer cells, in part by inducing PELP1 degradation via the proteasome pathway. RNA sequencing analyses showed that SMIP34 treatment altered the expression of genes associated with estrogen response, cell cycle, and apoptosis pathways. In cell line-derived and patient-derived xenografts of both WT and MT ER+ breast cancer models, SMIP34 reduced proliferation and significantly suppressed tumor progression. Collectively, these results demonstrate SMIP34 as a first-in-class inhibitor of oncogenic PELP1 signaling in advanced breast cancer. SIGNIFICANCE: Development of a novel inhibitor of oncogenic PELP1 provides potential therapeutic avenues for treating therapy-resistant, advanced ER+ breast cancer.

Mistreatment in Residency: Intervening With the REWIND Communication Tool.

Introduction: There is a lack of curricula addressing the alarming rates of resident physician mistreatment. As the ACGME works to address diversity, equity, and inclusion in GME, there has been increasing attention paid to the issue of mistreatment. Previous studies have noted a high prevalence of mistreatment within GME. Despite this, there are few published interventions to address the mistreatment of residents. We developed a workshop for residents to provide an overview of mistreatment in residency and teach them REWIND (relax, express, why, inquire, negotiate, determine), a communication tool to address mistreatment directly. Methods: We designed a 60-minute workshop for residents with didactics on mistreatment in GME, followed by three case discussions. Four case scenarios were developed to represent different types of mistreatment and situations. We implemented the workshop twice and asked participants to self-rate proficiency around the workshop objectives with pre- and postsurveys. Results: A total of 11 GME learners completed both the pre- and postsurveys between the two workshop implementations. GME learners who responded demonstrated significantly higher self-rated proficiency on each objective postworkshop compared to preworkshop (p < .05). Free responses on the survey demonstrated that participants particularly enjoyed the case discussions and wanted more practice with REWIND. Discussion: Our workshop improved participant self-rated proficiency around the mistreatment of resident physicians. The workshop can be used in the future as part of a multifaceted institutional response to mistreatment.

COVID-19 Education for Health Professionals Caring for Spanish-Speaking Patients.

Introduction: The COVID-19 pandemic has disproportionately affected Hispanics in the United States, who make up 18% of US inhabitants but 29% of COVID-19 cases as of June 2021. Recent studies have attributed higher COVID-19 infection, hospitalization, and death rates among Hispanics to social determinants of health. Given that the majority of US Hispanics are bilingual or Spanish-dominant, it is imperative for health care providers to be prepared to discuss COVID-19 prevention and treatment in Spanish. Methods: We developed an interactive workshop aimed at increasing health professionals' confidence in discussing COVID-19 prevention, risk factors, and treatments with Spanish-speaking patients. Learners were expected to have an intermediate level or higher proficiency in medical Spanish. The workshop consisted of a PowerPoint presentation and English/Spanish scripts to facilitate interactive learning. The workshop was evaluated using a postworkshop questionnaire to assess learners' perceived confidence in communicating with Spanish-speaking patients. Results: The workshop was implemented with 70 participants, who had diverse ethnoracial identities and professional roles, at five different medical schools. Fifty-three participants completed the postworkshop questionnaire. More than 50% reported near complete to complete confidence in meeting the three learning objectives. Discussion: With Hispanics being the largest non-White ethnoracial group in the US and being disproportionally affected by COVID-19, it is essential for health professionals to access training tools that allow them to practice medical Spanish. This module can uniquely aid in the preparation of health professionals caring for Spanish-speaking patients who present with COVID-19 symptoms.

LGBTQ+ Worker Protections: Implications for Academic Medicine Today and in the Future.

The Supreme Court's 2020 ruling prohibiting workplace discrimination based on sexual orientation or gender identity ( Bostock v Clayton County ) offers new legal protections for LGBTQ+ employees and allies and new opportunities for academic medicine to advance LGBTQ+ inclusion at their institutions. In this perspective piece, the authors examine the history of LGBTQ+ community recognition, tolerance, protections, and ongoing inclusion and the advocacy efforts led by LGBTQ+ patients, community activists, and medical colleagues. They also examine the current limitations of the court's ruling and recommend future actions to advance workplace and health equity. While recent advancements in equality have not erased chronic barriers to inclusion and advancement, they can pave the way for leaders in research, education, and clinical care to shape national health guidelines and policies that impact the health of all Americans.

The CSF1R-Microglia Axis Has Protective Host-Specific Roles During Neurotropic Picornavirus Infection.

Viral encephalitis is a major cause of morbidity and mortality, but the manifestation of disease varies greatly between individuals even in response to the same virus. Microglia are professional antigen presenting cells that reside in the central nervous system (CNS) parenchyma that are poised to respond to viral insults. However, the role of microglia in initiating and coordinating the antiviral response is not completely understood. Utilizing Theiler's murine encephalomyelitis virus (TMEV), a neurotropic picornavirus, and PLX5622, a small molecule inhibitor of colony-stimulating factor 1 receptor (CSF1R) signaling that can deplete microglia in the CNS; we investigated the role of the CSF1R-microglia axis in neurotropic picornavirus infection of C57BL/6J and SJL/J mice. These mouse strains differ in their ability to clear TMEV and exhibit different neurological disease in response to TMEV infection. CSF1R antagonism in C57BL/6J mice, which normally clear TMEV in the CNS, led to acute fatal encephalitis. In contrast, CSF1R antagonism in SJL/J mice, which normally develop a chronic CNS TMEV infection, did not result in acute encephalitis, but exacerbated TMEV-induced demyelination. Immunologically, inhibition of CSF1R in C57BL/6J mice reduced major histocompatibility complex II expression in microglia, decreased the proportion of regulatory T cells in the CNS, and upregulated proinflammatory pathways in CNS T cells. Acute CSF1R inhibition in SJL/J mice had no effect on microglial MHC-II expression and upregulated anti-inflammatory pathways in CNS T cells, however chronic CSF1R inhibition resulted in broad immunosuppression. Our results demonstrate strain-specific effects of the CSF1R-microglia axis in the context of neurotropic viral infection as well as inherent differences in microglial antigen presentation and subsequent T cell crosstalk that contribute to susceptibility to neurotropic picornavirus infection.

Tuning the Dimensionality of Excitons in Colloidal Quantum Dot Molecules.

Electrically coupled quantum dots (QDs) can support unique optoelectronic properties arising from the superposition of single-particle excited states. Experimental methods for integrating colloidal QDs within the same nano-object, however, have remained elusive to the rational design. Here, we demonstrate a chemical strategy that allows for the assembling of colloidal QDs into coupled composites, where proximal interactions give rise to unique optoelectronic behavior. The assembly method employing "adhesive" surfactants was used to fabricate both homogeneous (e.g., CdS-CdS, PbS-PbS, CdSe-CdSe) and heterogeneous (e.g., PbS-CdS, CdS-CdSe) nanoparticle assemblies, exhibiting quasi-one-dimensional exciton fine structure. In addition, tunable mixing of single-particle exciton states was achieved for dimer-like assemblies of CdSe/CdS core-shell nanocrystals. The nanoparticle assembly mechanism was explained within the viscoelastic interaction theory adapted for molten-surface colloids. We expect that the present work will provide the synthetic and theoretical foundation needed for building assemblies of many inorganic nanocrystals.

Computational and Experimental Analysis of Gold Nanorods in Terms of Their Morphology: Spectral Absorption and Local Field Enhancement.

A nanoparticle's shape and size determine its optical properties. Nanorods are nanoparticles that have double absorption bands associated to surface plasmon oscillations along their two main axes. In this work, we analize the optical response of gold nanorods with numerical simulations and spectral absorption measurements to evaluate their local field enhancement-which is key for surface-enhanced Raman spectroscopic (SERS) applications. Our experimental results are in good agreement with finite element method (FEM) simulations for the spectral optical absorption of the nanoparticles. We also observed a strong dependence of the optical properties of gold nanorods on their geometrical dimension and shape. Our numerical simulations helped us reveal the importance of the nanorods' morphology generated during the synthesis stage in the evaluation of absorption and local field enhancement. The application of these gold nanorods in surface-enhancement Raman spectroscopy is analyzed numerically, and results in a 5.8×104 amplification factor when comparing the values obtained for the nanorod deposited on a dielectric substrate compared to the nanorod immersed in water.