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INTRODUCTION: Parthenogenetic chimera is an extremely rare condition in human. Very few patients with parthenogenetic chimerism with XX/XY cells have been identified. CASE PRESENTATION: We report the clinical findings and molecular analysis of chimerism with a 46,XX/46,XY karyotype in a patient presenting idiopathic oligoasthenoteratozoospermia (OAT). To clarify the mechanism of chimera formation, short tandem repeat analysis using 21 loci was carried out. Quantitation of alleles in D6S1043, D12S391, fibrinogen alpha chain, and amelogenin revealed double paternal and one maternal genetic contribution to the patient, which is consistent with a parthenogenetic chimerism. The likely mechanism of chimerism formation was also discussed, followed by a literature review. CONCLUSION: This is the first documented case of parthenogenetic chimerism in an adult male with XX/XY cells presenting OAT. Improved cell sampling and more sensitive and specific detection methods are necessary to identify more patients with XX/XY chimerism for systematic studies on this condition in the future.
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Quimerismo , Humanos , Masculino , Adulto , Oligospermia/genética , Partenogênese/genética , Repetições de Microssatélites/genética , Cromossomos Humanos Y/genética , Cromossomos Humanos X/genética , Azoospermia/genética , CariotipagemRESUMO
The highly reflective solar radiation of passive daytime radiative cooling (PDRC) increases heating energy consumption in the cold winter. Inspired by the temperature-adaptive skin color of chameleon, we efficiently combine temperature-adaptive solar absorption and PDRC technology to achieve "warm in winter and cool in summer". The temperature-adaptive radiative cooling coating (TARCC) with color variability is designed and fabricated, achieving 41% visible light regulation capability. Comprehensive seasonal outdoor tests confirm the reliability of the TARCC: in summer, the TARCC exhibits high solar reflectance (â¼93%) and atmospheric transmission window emittance (â¼94%), resulting in a 6.5 K subambient temperature. In the winter, the TARCC's dark color strongly absorbs solar radiation, resulting in a 4.3 K temperature rise. Compared with PDRC coatings, the TARCC can save up to 20% of annual energy in midlatitude regions and increase suitable human hours by 55%. With its low cost, easy preparation, and simple construction, the TARCC shows promise for achieving sustainable and comfortable indoor environments.
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OBJECTIVES: Although lenticulostriate artery (LSA) territorial infarcts usually appear as single subcortical infarctions (SSIs) on imaging, they are caused by various etiological mechanisms. We aimed to investigate the correlation between LSA morphology and the location or size of infarcts. Besides, we explored whether the location or size of infarcts can predict the presence of middle cerebral artery (MCA) plaques and distinguish the different etiological mechanisms of SSI patients. METHODS: We prospectively included patients with acute SSI in the LSA territory. The MCA plaques, infarct features, including the number of infarct slices, lowest infarct layer index (LILI), volume, maximum area and diameter, and LSA morphological characteristics, including the number of stems and branches, length, distance, and tortuosity were evaluated. RESULTS: A total of 105 patients were enrolled. Both the average length and average distance of LSAs were negatively correlated with the maximum infarct area (P=0.048, P=0.028, respectively) and maximum infarct diameter (P=0.016, P=0.010, respectively) on axial examination and were positively correlated with LILI (P=0.020, P=0.003, respectively). The number of LSA branches was associated with the number of infarct slices (P=0.040) and LILI (P=0.043). Moreover, we found that when the LILI=1 or 2 and the number of infarct slices ≥3, the SSI patients were more likely to have MCA plaques (P=0.045). CONCLUSIONS: SSI patients with a LILI=1 or 2 and infarct slices of ≥3 were more likely to have MCA plaques. Our findings might provide a simple and feasible method to distinguish the different underlying mechanisms of SSIs for clinicians.
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Infarto Cerebral , Angiografia por Ressonância Magnética , Humanos , Angiografia por Ressonância Magnética/métodos , Infarto Cerebral/diagnóstico por imagem , Infarto Cerebral/etiologia , Artéria Cerebral Média/diagnóstico por imagem , Imagem de Difusão por Ressonância Magnética/métodos , CausalidadeRESUMO
The present report firstly described a critically ill patient receiving a dosing regimen of ceftazidime-avibactam (CAZ-AVI) (1.875g q24h) to eliminate multidrug-resistant Klebsiella pneumoniae and a scheduled time for prolonged intermittent renal replacement therapy (PIRRT) every 48h (6h-session beginning 12h after the previous dosage on hemodialysis day). This dosing regimen for CAZ-AVI and a scheduled time for PIRRT allowed pharmacodynamic parameters of ceftazidime and avibactam to have little difference on hemodialysis and non-hemodialysis days so that we can maintain a relatively stable drug concentration. Our report highlighted not only the importance of dosing regimens in patients with PIRRT but also the significance of hemodialysis time points during the dosing interval. The innovative therapeutic plan proved to be suitable for patients infected with Klebsiella pneumoniae when on PIRRT according to the trough plasma concentrations of ceftazidime and avibactam which were maintained above the minimum inhibitory concentration during the dosing interval.
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Ceftazidima , Terapia de Substituição Renal Intermitente , Humanos , Ceftazidima/uso terapêutico , Ceftazidima/farmacologia , Antibacterianos/farmacologia , Compostos Azabicíclicos/uso terapêutico , Compostos Azabicíclicos/farmacologia , Combinação de Medicamentos , Klebsiella pneumoniae , Testes de Sensibilidade MicrobianaRESUMO
A numerical model was developed and validated to investigate the fluid-structure interactions between fully developed pipe flow and core-shell-structured microcapsule in a microchannel. Different flow rates and microcapsule shell thicknesses were considered. A sixth-order rotational symmetric distribution of von Mises stress over the microcapsule shell can be observed on the microcapsule with a thinner shell configuration, especially at higher flow rate conditions. It is also observed that when being carried along in a fully developed pipe flow, the microcapsule with a thinner shell tends to accumulate stress at a higher rate compared to that with a thicker shell. In general, for the same microcapsule configuration, higher flow velocity would induce a higher stress level over the microcapsule shell. The deformation gradient was used to capture the microcapsule's deformation in the present study. The effect of Young's modulus on the microcapsule shell on the microcapsule deformation was investigated as well. Our findings will shed light on the understanding of the stability of core-shell-structured microcapsule when subjected to flow-induced shear stress in a microfluidic system, enabling a more exquisite control over the breakup dynamics of drug-loaded microcapsule for biomedical applications.
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Microfluídica , Cápsulas , Estresse MecânicoRESUMO
BACKGRO: To assess the microvascular changes in the macular region and the foveal avascular zone (FAZ) area in participants with white matter hyperintensities (WMHs) using swept source optical coherence tomography angiography (SS OCTA). METHODS: This cross-sectional study included a total of 23 WMH participants (45 eyes) and 20 age-matched healthy participants (40 eyes). SS OCTA (VG200; SVision Imaging, Ltd., Luoyang, China) was used to assess the retinal vessel density (VD) and the FAZ area. VD was measured in the superficial vascular plexus (SVP), intermediate capillary plexus (ICP) and deep capillary plexus (DCP) within a 6 × 6-mm scan centred on the macula using a 5-mm Macula circle. The FAZ area was automatically measured on the inner retina layer within a 3 × 3-mm scan in the macular region. RESULTS: There was no significant difference in VD in the SVP between the two groups. However, VD in both the ICP and DCP was significantly decreased in WMH participants (P = 0.028, P = 0.016). The FAZ area was significantly enlarged in WMH participants (P = 0.030). The signal quality was significantly lower in WMH participants (P < 0.001). CONCLUSIONS: This study suggested that WMH participants have retinal microvascular and foveal avascular zone area changes compared with healthy controls. Further longitudinal studies with larger sample sizes are warranted to identify the value of our findings in the early evaluation of WMHs.
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Macula Lutea , Substância Branca , Estudos Transversais , Angiofluoresceinografia , Humanos , Macula Lutea/diagnóstico por imagem , Vasos Retinianos/diagnóstico por imagem , Tomografia de Coerência Óptica , Acuidade VisualRESUMO
The presence of noncondensable gas (NCG) followed by undesirable heat transfer deterioration cannot be avoided in some situations. In this work, droplet nucleation and growth for the Ar-Ne mixed system are investigated using molecular dynamics simulation. Different droplet state transition modes corresponding to the subcooling degree or NCG content are obtained. The interaction between NCG and a droplet caused by gas enrichment near the solid surface is considered to explain the droplet wetting state during the condensation process. Finally, the disappearance mechanism of the flooding mode on the nanostructured surface under a large amount of NCG is clarified from the nanoscale, which could encourage a clear understanding of the NCG effect on dropwise condensation heat transfer on nanostructured superhydrophobic surfaces.
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Ice formation and accumulation have detrimental effects on commercial surfaces and people's lives. The ice adhesion strength decreases with increasing surface hydrophobicity, and the superhydrophobicity of a surface can be constructed by a combination of low surface free energy and high surface roughness. Conversely, the characteristics of biological surfaces have aroused wide attention as a result of the superhydrophobicity of plants and animals, deriving from the synergistic effects of chemical compositions and multi-scale hierarchical structures. Therefore, inspired by bio-mimetic studies on biological surfaces, a lot of artificial bio-inspired superhydrophobic surfaces have been broadly designed and constructed. Herein, we aim to summarize the fundamental theories of surface wettability and recent progress in the fabrication of bio-inspired surfaces. The bio-inspired surfaces prepared by different facile methods not only have superhydrophobicity, but also have anti-icing/icephobic properties. In the end, some challenges and problems in the future study and advancement of bio-inspired superhydrophobic surfaces are proposed.
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Biomimética , Animais , Interações Hidrofóbicas e Hidrofílicas , Propriedades de Superfície , MolhabilidadeRESUMO
BACKGROUND: Retinal vasculopathy with cerebral leukoencephalopathy and systemic manifestations (RVCL-S) is an adult-onset rare monogenic microvasculopathy. Its typical neuroimaging features are punctate white matter lesions or pseudotumor alterations. RVCL-S is often under-recognized and misdiagnosed because of its rarity and similar imaging manifestations to multiple sclerosis or brain malignant mass. CASE PRESENTATION: Here we report a case of a 36-year-old Chinese man who developed multiple tumefactive brain lesions spanning over two years leading to motor aphasia, cognitive decline, and limb weakness. He also presented with slight vision loss, and fundus fluorescein angiography indicated retinal vasculopathy. He underwent brain biopsies twice and showed no evidence of malignancy. Given the family history that his father died of a brain mass of unclear etiology, RVCL-S was suspected, and genetic analysis confirmed the diagnosis with a heterozygous insertion mutation in the three-prime repair exonuclease 1 gene. He was given courses of corticosteroids and cyclophosphamide but received little response. CONCLUSIONS: The present case is one of the few published reports of RVCL-S with two-year detailed imaging data. Serial magnetic resonance images showed the progression pattern of the lesions. Our experience emphasizes that a better understanding of RVCL-S and considering it as a differential diagnosis in patients with tumefactive brain lesions may help avoid unnecessary invasive examinations and make an earlier diagnosis.
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Leucoencefalopatias/diagnóstico por imagem , Imageamento por Ressonância Magnética/métodos , Doenças Vasculares/diagnóstico , Adulto , Encéfalo/patologia , Disfunção Cognitiva/diagnóstico , Diagnóstico Diferencial , Heterozigoto , Humanos , Leucoencefalopatias/genética , Masculino , NeuroimagemRESUMO
BACKGROUND: Infertile women often face stigmatization worldwide. This study aimed to investigate the stigma against infertile women in China and to analyze its influencing factors. METHODS: Of 270 women who were randomly selected from patients receiving adjuvant fertility treatment in Zhejiang Province, China, 254 successfully completed the general information questionnaire, disease information questionnaire, and Chinese version of the infertility stigma scale (ISS). The ISS contained 27 positively worded items, each of which was graded on a 5-point Likert-type scale. RESULTS: The total stigma score of female infertility patients was 66.39 ± 21.96. By dividing the number of items, the average score for each ISS item was 2.13 ± 0.81, indicating the presence of stigma. Among the four ISS factors, the social withdrawal score was the highest (2.64 ± 1.05), whereas the family stigma score was the lowest (1.88 ± 0.88). Multiple stepwise regression analysis further revealed that the duration of infertility and monthly income were important predictors of the stigma of infertile women. CONCLUSIONS: Infertile women experience moderate to high levels of stigma in Zhejiang, China. Thus, supportive psychological interventions and public education are required to change patients' cognition and assist patients in coping with negative experiences.
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Infertilidade Feminina , Adaptação Psicológica , China , Feminino , Humanos , Estigma Social , Inquéritos e QuestionáriosRESUMO
PURPOSE: The efficacy of progesterone supplementation in the treatment of threatened miscarriage is controversial. This meta-analysis was to evaluate the correlation between progesterone and improving pregnancy outcomes in women with threatened miscarriage. METHODS: We searched PubMed, EMBASE, and the Cochrane Library for relevant randomized controlled trials (RCTs) to demonstrate the efficacy of progesterone on the threatened miscarriage pregnancy. The outcomes were miscarriage, preterm birth, and live birth. RESULTS: Nine RCTs comparing 4907 patients were included in this study. Compared with placebo or no treatment, progesterone supplementation had a relationship with a reduction in the rate of miscarriage [RR 0.70 95% Cl (0.52, 0.94)]. There was no significant difference between progesterone supplementation and placebo or no treatment in preterm birth [RR 0.87 95% Cl (0.52, 1.47) and live birth (RR 1.02 95% Cl (0.98, 1.07)]. CONCLUSION: Progesterone supplementation did not significantly improve the incidence of preterm and live birth, so progesterone treatment of threatened miscarriage may be unhelpful.
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Ameaça de Aborto/tratamento farmacológico , Progesterona/administração & dosagem , Ensaios Clínicos Controlados Aleatórios como Assunto , Adulto , Feminino , Humanos , Nascido Vivo , Gravidez , Resultado da Gravidez , Nascimento Prematuro/epidemiologia , Progesterona/uso terapêuticoRESUMO
BACKGROUND AND PURPOSE: We aimed to use novel whole-brain vessel-wall magnetic resonance imaging (WB-VWI) to investigate the association between plaque distribution of middle cerebral artery (MCA) and morphological changes of the lenticulostriate arteries (LSAs) in single subcortical infarctions. METHODS: Forty single subcortical infarction patients with no relevant MCA disease on magnetic resonance angiography were prospectively enrolled. Plaque location in the MCA was dichotomized as proximal (located adjacent to the LSA origin) or distal (located distal to the LSA origin) on whole-brain vessel-wall magnetic resonance imaging. The MCAs with proximal plaques were divided into the symptomatic and asymptomatic side, and asymptomatic side MCAs without proximal plaques were the control group. The morphological characteristics of the LSAs and features of proximal plaques were analyzed. RESULTS: A total of 71 MCAs in 40 patients were analyzed (31 on the symptomatic side, 22 on the asymptomatic side, and 18 in the control group). Superior-wall plaques of MCAs were observed more frequently on the symptomatic side than the asymptomatic side (45.2% versus 9.1%, P=0.005). The wall area index, plaque burden, and remodeling index did not differ significantly between the symptomatic and asymptomatic side. The number of LSA branches was smaller (P=0.011) in the symptomatic side (5.48±1.88) compared with the control group (6.83±1.92). The symptomatic side exhibited shorter average length of the LSAs (23.23±3.44 versus 25.75±3.76 mm, P=0.025) and shorter average distance of the LSAs (16.47±3.11 versus 21.53±4.76 mm, P<0.001) compared with the asymptomatic side. CONCLUSIONS: Superiorly distributed MCA plaques at the LSA origin are closely associated with morphological changes of the LSA in symptomatic MCAs, suggesting that the distribution, rather than the inherent features of plaques, determines the occurrence of single subcortical infarctions. Our findings provide insight into the etiologic mechanism of branch atheromatous disease in single subcortical infarctions.
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Artérias Cerebrais/diagnóstico por imagem , Infarto Cerebral/diagnóstico por imagem , Placa Aterosclerótica/diagnóstico por imagem , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Lateralidade Funcional , Humanos , Processamento de Imagem Assistida por Computador , Infarto da Artéria Cerebral Média/diagnóstico por imagem , Arteriosclerose Intracraniana/diagnóstico por imagem , Angiografia por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Adulto JovemRESUMO
BACKGROUND: The etiologic determinants of cryptogenic stroke remain a diagnostic challenge in clinical practice. Fabry disease (FD) is one of the monogenic causes of stroke that may remain unrecognized as a potential contributing causative factor, because of its rarity and difficulty in diagnosis. We report a case with rare bilateral medial medullary infarction manifesting as "heart appearance" who was diagnosed with FD. CASE PRESENTATION: A 51-year-old Chinese man presented with acute dysarthria and mild tetraparesis. In the 24 h following admission, the patient rapidly developed progressive flaccid quadriplegia and tongue weakness, necessitating ventilator support. Immediate magnetic resonance imaging of the brain showed heart-shaped appearance of bilateral medial medullary infarction. The patient suffered two new subcortical infarcts 40 days after the first. Detailed Family history and physical examination indicated symptoms consistent with FD, which was confirmed by very low alpha galactosidase A levels and a missense mutation of the alpha-galactosidase A gene. CONCLUSIONS: We report what appears to be the first case of FD manifesting as bilateral medial medullary infarction. Our case suggests that clinicians should consider the possibility of FD in patients with cryptogenic stroke, especially when combined with infarction in the vertebrobasilar artery system, renal insufficiency, or cardiomyopathy. A detailed analysis of subtle historical clues and performing a complete physical examination on stroke patients would help promote earlier diagnosis of FD.
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Doença de Fabry/complicações , Acidente Vascular Cerebral/etiologia , Doença de Fabry/diagnóstico , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Bulbo/diagnóstico por imagem , Bulbo/patologia , Pessoa de Meia-Idade , Acidente Vascular Cerebral/diagnóstico por imagemRESUMO
OBJECTIVES: To explore the effect of exogenous recombinant high mobility group protein box1 (rHMGB1) on proliferation and differentiation of neural stem cells (NSCs) and the related mechanism. METHODS: SD rat cerebral cortex cells were cultured in serum-free medium, extending the culture and purification of neural stem cells. NSCs were identified by detecting nestin-label with immunofluorescence method.The NSCs proliferation activity after adding different concentrations of rHMGB1 was determined by CCK-8 assay and the optimal concentration of rHMGB1 for the follow-up experiments was selected.The effect of rHMGB1 on NSCs differentiation was detected by immunofluorescence assay. The mRNA and protein expression of involved factors were studied by real-time PCR and Western blot separately. RESULTS: The neural cells isolated from the cortex of rat embryos showed the expression of nestin antigen and the neural stem cells purity could reach more than 99% when cultured to the third generation. Under the stimulation of 10 ng/mL rHMGB1, neural stem cells proliferation activity were the highest, therefore, 10 ng/mL rHMGB1 was selected to treat the experimental group. The expression of TUJ1 in the experimental group was higher than that in the control group (P<0.05). Real-time PCR and Western blot confirmed rHMGB1 could improve the expression of receptor for advanced glycation end products (RAGE), Toll-like receptor 2 (TLR2), Toll-like receptor 4 (TLR4), matrix metalloproteinase 9 (MMP-9) and nerve growth factor(NGF) respectively at the level of mRNA and protein expression. CONCLUSIONS: Exogenous rHMGB1 promoted rat NSCs proliferation and differentiation into neuronsin vitro by activating RAGE, TLRs, MMP-9 signaling.
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Diferenciação Celular , Proliferação de Células , Proteína HMGB1/farmacologia , Células-Tronco Neurais/efeitos dos fármacos , Animais , Células Cultivadas , Metaloproteinase 9 da Matriz/metabolismo , Fator de Crescimento Neural/metabolismo , Células-Tronco Neurais/citologia , Ratos , Ratos Sprague-Dawley , Receptor para Produtos Finais de Glicação Avançada/metabolismo , Proteínas Recombinantes/farmacologia , Receptor 2 Toll-Like/metabolismo , Receptor 4 Toll-Like/metabolismoRESUMO
BACKGROUND: Burden of non-communicable diseases (NCDs) is increasing rapidly in most of the developing countries including China, even in rural areas. Dearth of representative data called for an investigation to estimate the burden and identify the correlates of NCDs in rural China. METHODS: A cross-sectional study was conducted involving a representative sample of 6003 consenting randomly selected rural residents aged 15 years or more, from 36 villages of Shijiazhuang in Hebei province of China between July 2010 and June 2011. Information on demographics and behavior were collected, body mass index (BMI) and blood pressure were measured and blood samples were tested to diagnose diabetes and hyperlipidemia. RESULTS: Majority participants were aged < 30 year, married and educated up to junior/senior high school level. Mean age for the 6003 participants was 37.4 ± 14.8. About 55.7% had BMI of 18.6-24.9. In past 12 months: 19.8% smoked daily, 41.6% were exposed to passive smoking, 28.5% drank alcohol, 10.4% skipped breakfasts frequently, 82.8% did never exercise and 25.3% had psychological disturbances. 51.1% were hypertensive, 6.7% were diabetic and 9.2% had hyperlipidemia. Based on self-reports, cardiovascular diseases (4.5%), cerebrovascular diseases (2.3%), cancers (0.2%), chronic obstructive pulmonary diseases (2%), orthopedic problems (12.1%) and gastrointestinal NCDs (7.8%) were identified among the participants, while proportion of subjects with one, two and three or more NCDs were 43%, 14.4% and 5.5% respectively. Higher odds of having more NCDs were associated with higher BMI (Kg/M(2)), family history of NCDs, daily and past history of smoking and drinking, passive smoking, lack of exercise, skipping breakfast and psychological disturbances. CONCLUSION: Despite limitations associated with cross-sectional design and self-reporting, observation in this large sample of rural residents could develop important insights regarding high burden of NCDs in this population. Based on the identified correlates, targeted intervention strategies seem to be required urgently to control NCDs in rural China.
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Doença Crônica/epidemiologia , Comportamentos Relacionados com a Saúde , Neoplasias/epidemiologia , População Rural/estatística & dados numéricos , Adulto , Consumo de Bebidas Alcoólicas/epidemiologia , Pressão Sanguínea , Índice de Massa Corporal , Doenças Cardiovasculares/epidemiologia , China/epidemiologia , Estudos Transversais , Países em Desenvolvimento , Diabetes Mellitus/epidemiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prevalência , Doença Pulmonar Obstrutiva Crônica/epidemiologia , Fumar/epidemiologia , Fatores SocioeconômicosRESUMO
Surfactant flooding has been considered as a promising approach for chemically enhanced oil recovery (EOR). However, this technique encounters several limitations, such as high costs, environmental concerns, and reduced efficiency under high-temperature and high-salinity reservoir conditions. Recently, nanoparticles have also been proposed as an alternative for EOR due to their superior properties compared with surfactants. This research employs molecular dynamics simulations to explore the impact of modified SiO2 nanoparticles on oil-water interfacial behaviors and the detachment of oil droplets from an oil-wet surface. The simulation results reveal that modified nanoparticles, featuring hydrophilic and hydrophobic functional groups, have slight impacts on interfacial tension reduction of the oil-water interface. Nanoparticles with varying degrees of modification exhibit distinct positions within the interface, consequently influencing the thickness of the interfacial layer. Notably, the interactions among the nanoparticles, oil molecules, and surface facilitate the formation of a water channel, thereby enhancing the process of oil detachment. Comparative analysis indicates that in terms of oil displacement efficiency, the thickness of the interfacial layer has a more significant impact than interfacial tension reduction. Furthermore, to elucidate the mechanisms of modified nanoparticles enhancing the oil recovery rate, the interaction energies among the oil droplet, nanoparticles, water, and surface are analyzed. The molecular-level insights derived from this investigation could provide valuable guidance for the design of modified nanoparticles tailored to EOR applications.
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BACKGROUND: Retinal ischemic perivascular lesions (RIPLs) are an indicator of ischemia in the middle retina. We aimed to determine the relationship between RIPLs and single subcortical infarction (SSI). We also investigated the differences in cerebral small vessel disease imaging burden between groups with and without RIPLs in SSI. METHODS AND RESULTS: In this case-control study, we enrolled 82 patients with SSI and 72 nonstroke controls. All participants underwent magnetic resonance imaging and swept-source optical coherence tomography/optical coherence tomography angiography. Small vessel disease markers such as lacunes, cerebral microbleeds, white matter hyperintensity, and perivascular spaces were rated on brain imaging. RIPLs were assessed via swept-source optical coherence tomography. Optical coherence tomography angiography was used to measure the superficial vascular complex and deep vascular complex of the retina. After adjusting for risk factors, the presence of RIPLs was significantly associated with SSI (odds ratio [OR], 1.506 [95% CI, 1.365-1.662], P<0.001). Eyes with RIPLs showed lower deep vascular complex density (P=0.035) compared with eyes without RIPLs in patients with SSI. After adjusting for vascular risk factors, the presence of RIPLs in patients with SSI was associated with an increased periventricular white matter hyperintensity burden (ß=0.414 [95% CI, 0.181-0.647], P<0.001) and perivascular spaces-basal ganglia (ß=0.296 [95% CI, 0.079-0.512], P=0.008). CONCLUSIONS: RIPLs are associated with SSI independent of underlying risk factors. The relationship between the presence of RIPLs and small vessel disease markers provides evidence that RIPLs might be an additional indicator of cerebral ischemic changes.
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Doenças de Pequenos Vasos Cerebrais , Vasos Retinianos , Tomografia de Coerência Óptica , Humanos , Masculino , Feminino , Tomografia de Coerência Óptica/métodos , Idoso , Doenças de Pequenos Vasos Cerebrais/diagnóstico por imagem , Doenças de Pequenos Vasos Cerebrais/complicações , Pessoa de Meia-Idade , Estudos de Casos e Controles , Vasos Retinianos/patologia , Vasos Retinianos/diagnóstico por imagem , Imageamento por Ressonância Magnética , Doenças Retinianas/diagnóstico , Doenças Retinianas/etiologia , Infarto Cerebral/diagnóstico por imagem , Fatores de RiscoRESUMO
Purpose: The effect of carotid artery stenting in patients with unilateral carotid artery stenosis on the retina and choroid was evaluated using swept-source optical coherence tomography angiography (SS-OCTA). Methods: SS-OCTA examination was conducted before stenting and 4 days and 3 months after stenting. The retinal nerve fiber layer, ganglion cell-inner plexiform layer (GCIPL), inner nuclear layer, superficial vascular complex (SVC), deep vascular complex (DVC), choroidal vascular volume (CVV), and choroidal vascular index were measured. Repeated-measures analysis of variance was performed to assess the impact of carotid artery stenting on optical coherence tomography angiography (OCTA) metrics. Results: At baseline, 303 eyes from 160 patients (61.82 ± 9.98 years; 85.29% males) were enrolled. SVC and DVC densities and CVV were lower in ipsilateral eyes (stenosed side) compared to contralateral eyes (all P < 0.05). Four days after stenting, a significant increase was seen in SVC density in ipsilateral eyes (P < 0.05) while a significant increase was seen in CVV in ipsilateral eyes and contralateral eyes (both P < 0.05). Three months after stenting (63 patients with 114 eyes), a significant decrease was seen in the GCIPL thickness of ipsilateral and contralateral eyes (all P < 0.001). Conclusions: Short term after carotid artery stenting, ipsilateral eyes showed a rapid and significant increase in SVC density and CVV. Translational Relevance: Optical coherence tomography (OCT)/OCTA measurements may have the potential to detect retinal and choroidal changes after stenting. Future research on the long-term effect of stenting on the retina and choroid will be guided by these findings.
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Estenose das Carótidas , Corioide , Stents , Tomografia de Coerência Óptica , Humanos , Feminino , Masculino , Stents/efeitos adversos , Pessoa de Meia-Idade , Corioide/diagnóstico por imagem , Corioide/irrigação sanguínea , Corioide/patologia , Estenose das Carótidas/cirurgia , Estenose das Carótidas/diagnóstico por imagem , Estenose das Carótidas/terapia , Idoso , Retina/diagnóstico por imagem , Retina/patologia , Retina/cirurgia , Estudos ProspectivosRESUMO
The Guizhou golden monkey (Rhinopithecus brelichi) is a critically endangered wildlife species, and understanding its diet composition may be useful for assessing its feeding strategies. DNA metabarcoding was used to determine the dietary diversity of R. brelichi. DNA was extracted from 31 faecal samples and amplified chloroplast rbcL and mitochondrial COI DNA was sequenced using the Illumina NovaSeq platform. A comparative analysis of the sequences revealed that the five most abundant plant genera were Magnolia, Morinda, Viburnum, Tetradium and Eurya. In winter, R. brelichi mostly consumed shrubs, herbs and shrubs/trees according to the habit of plant genera with higher abundances comparatively. The five most abundant families in animal diet were Psychodidae, Trichinellidae, Staphylinidae, Scarabaeidae and Trichoceridae. This study is the first to show the composition of the winter animal diets of R. brelichi based on DNA metabarcoding. These results provide an important basis for understanding the diet of wild R. brelichi, which inhabits only the Fanjingshan National Nature Reserve, China.
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AIMS: Cerebrovascular lesions in the primary visual cortex, the lateral geniculate nucleus, and the optic tract have been associated with retinal neurodegeneration via the retrograde degeneration (RD) mechanism. We aimed to use optical coherence tomography (OCT) to assess the effects of the strategic single subcortical infarction (SSI) location on retinal neurodegeneration and its longitudinal impacts. METHODS: Patients with SSI were enrolled and stratified by lesion location on cerebral MRI into the thalamic infarction group and extra-thalamic infarction group. Healthy controls from the native communities were also recruited. Retinal nerve fiber layer (RNFL) and ganglion cell-inner plexiform layer (GCIPL) were quantified using OCT. Generalized estimating equation (GEE) models were used for cross-sectional analyses and linear mixed models for longitudinal analyses. P < 0.05 was considered statistically significant. RESULTS: We included a total of 283 eyes from 149 SSI patients. Of these, 115 eyes of 60 patients with follow-up were included in the longitudinal analyses. Cross-sectionally, thalamic-infarction patients had reduced retinal thickness compared with extra-thalamic infarction patients after adjustment for age, gender, disease duration, and vascular risk factors (p = 0.026 for RNFL, and p = 0.026 for GCIPL). Longitudinally, SSI patients showed greater retinal thinning compared with healthy controls over time (p = 0.040 for RNFL, and p < 0.001 for GCIPL), and thalamic infarction patients exhibited faster rates of GCIPL thinning in comparison with extra-thalamic infarction patients (p < 0.001). CONCLUSION: Our study demonstrates a distinct effect of subcortical infarction lesion site on the retina both at the early stage of disease and at the 1-year follow-up time. These results present evidence of significant associations between strategic infarction locations and retinal neurodegeneration. It may provide novel insights for further research on RD in stroke patients and ultimately facilitate individualized recovery therapeutic strategy.