Letters in Applied NanoBioScience最新文献_第10页

Development of High Coercivity/High Fluorescence Hybrid nanostructures 高矫顽力/高荧光杂化纳米结构的研制

Letters in Applied NanoBioScience Pub Date : 2022-03-19 DOI: 10.33263/lianbs122.048

D. Rawat, R. Singh

{"title":"Development of High Coercivity/High Fluorescence Hybrid nanostructures","authors":"D. Rawat, R. Singh","doi":"10.33263/lianbs122.048","DOIUrl":"https://doi.org/10.33263/lianbs122.048","url":null,"abstract":"The study concentrated on the prospects of multifunctional core-shell that can incorporate multiple functions simultaneously. For the sharp and precise assembling of core-shell nanostructures (CS-Ns) combining ferromagnetic-core and semiconducting-shell into a single material with mouldable fluorescence and magnetic features, the seed-mediated aqueous growth technique was flourished. SrFe12O19/CdS CS-Ns were designed to gratify the requirement of magneto-fluorescent features in a solo unit. Characterization techniques such as XRD, VSM and photoluminescence spectroscopy (PL) was used to analyze the as-synthesized CS-Ns. XRD spectra confirm the CS-Ns formation with the pure phase. PL results show that the CS-Ns follow the emission profile of the CdS shell. CS-Ns formation leads to a much better particle size distribution. In VSM analysis, it was observed that the saturation of the hysteresis loop is decayed many times as that of the bare core because of the semiconducting shell covering over the core. Altogether the results were in good agreement with one another. Because of the permanent magnetic nature of SrFe12O19 (1000°C), these CS-Ns are used in the magnetic separation process, where the ferromagnetic core aids in magnetic manipulation, and the fluorescent shell aids in detecting the path of the separated entity.","PeriodicalId":18009,"journal":{"name":"Letters in Applied NanoBioScience","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83037543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical and Structural Study of Biocompatible Silver-Chitosan Colloids 生物相容性银壳聚糖胶体的光学和结构研究

Letters in Applied NanoBioScience Pub Date : 2022-03-19 DOI: 10.33263/lianbs122.049

Vismitha S. Patil, B. Saraswathi, R. M. Hodlur, J. AmithYadavH., S. V. Halse, Muttanagoud N. Kalasad

引用次数: 0

Investigation on Quantum Computational Analysis and Toxicity Prediction of 4-Nitrophenylisocyanate 4-硝基苯基异氰酸酯的量子计算分析及毒性预测研究

Letters in Applied NanoBioScience Pub Date : 2022-03-19 DOI: 10.33263/lianbs122.045

引用次数: 0

Optical and Structural Studies of Tin Disulfide (SnS2) Synthesized by Facile Hydrothermal Method 易溶水热法合成二硫化锡(SnS2)的光学和结构研究

Letters in Applied NanoBioScience Pub Date : 2022-03-19 DOI: 10.33263/lianbs122.047

{"title":"Optical and Structural Studies of Tin Disulfide (SnS2) Synthesized by Facile Hydrothermal Method","authors":"","doi":"10.33263/lianbs122.047","DOIUrl":"https://doi.org/10.33263/lianbs122.047","url":null,"abstract":"Transition metal dichalcogenides (TMDCs) have found diverse applications for intrinsic semiconducting and tunable electronic properties mediated via the van der Waals interaction between the adjacent chalcogen planes. Therefore, the large-scale production of TMDCs without compromising the material properties is the major challenge at the present moment. We follow a simple, cost-effective, and environmentally friendly hydrothermal technique for synthesizing tin disulfide (SnS2). The optical properties are investigated using UV-visible, photoluminescence (PL), Raman, and FTIR spectroscopy. The UV-visible absorption spectra of pure SnS2 show a broad absorption peak located at 340 nm, and the corresponding optical band gap energies are estimated to be 2.14 and 4.02 eV, respectively. The PL spectra display a sharp emission peak at 561 nm due to the radiative recombination of bound excitons for the excitation wavelength of 340 nm. FTIR is used to observe the existence of functional groups in the material. The absorption peak observes at 625 cm-1 corresponds to the vibration of the Sn-S bond. From Raman spectra, a sharp peak appears at 314 cm-1, corresponding to the A1g mode of pure SnS2, which occurs due to the out-of-plane stretching vibration of sulfur atoms in the SnS2 material. The XRD is used to identify structural phases. The sharp diffraction peaks at 2Ɵ = 15.17ᴼ and 28.55ᴼ corresponds to (001) and (100) planes, respectively, that suggest the hexagonal phase of pure SnS2. Interplanar spacing is estimated using Bragg’s law, and the value is found to be 5.83 Å. The average crystallite size is estimated to be 28 nm from the Williamson-Hall plot, which is comparable with the crystallite size calculated from Scherrer’s formula.","PeriodicalId":18009,"journal":{"name":"Letters in Applied NanoBioScience","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91207682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparative Studies on Dispersion Characters of Titanium Dioxide (TiO2) Nanoparticles for Rodent Toxicology Studies 用于啮齿动物毒理学研究的二氧化钛纳米颗粒分散特性的比较研究

Letters in Applied NanoBioScience Pub Date : 2022-03-19 DOI: 10.33263/lianbs122.051

引用次数: 0

Evaluation of Biological Activity of Oil Crocodylus moreletii on Glucose levels Using a Diabetic Model 用糖尿病模型评价油鳄对血糖水平的生物活性

Letters in Applied NanoBioScience Pub Date : 2022-03-19 DOI: 10.33263/lianbs122.046

López-Ramos Maria, Figueroa‐Valverde Lauro, D. Francisco, Rosas-Nexticapa, Marcela, Cervantes-Ortega Catalina, Alvarez-Ramirez Magdalena, Mateu-Armad Maria, Virgínia, Lopez-Gutierrez Tomas

{"title":"Evaluation of Biological Activity of Oil Crocodylus moreletii on Glucose levels Using a Diabetic Model","authors":"López-Ramos Maria, Figueroa‐Valverde Lauro, D. Francisco, Rosas-Nexticapa, Marcela, Cervantes-Ortega Catalina, Alvarez-Ramirez Magdalena, Mateu-Armad Maria, Virgínia, Lopez-Gutierrez Tomas","doi":"10.33263/lianbs122.046","DOIUrl":"https://doi.org/10.33263/lianbs122.046","url":null,"abstract":"There are some reports which show that omega-3 fatty acids extracted from either animals or plants can be used to reduce glucose levels in diabetic patients; however, the results are very confusing; perhaps this phenomenon is due to the different protocols used. Analyzing these data, this study aimed to evaluate the biological activity of the oil extracted from Crocodylus moreletii at a dose of 100, 200, and 300 µl/kg using metformin glibenclamide and sodium oleate as controls in a diabetic rat model. The results showed that oil Crocodylus moreletii lowered glucose levels in a dose-dependent manner than untreated diabetic rats. Furthermore, the effects produced by Crocodylus moreletii oil and sodium oleate on glucose concentration were very similar. However, the biological activity exerted by glibenclamide and metformin on glucose levels was different from to effect induced by Crocodylus moreletii oil and sodium oleate. In conclusion, the biological activity of Crocodylus moreletii oil is interesting and could be considered a therapeutic alternative for the treatment of diabetes.","PeriodicalId":18009,"journal":{"name":"Letters in Applied NanoBioScience","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84623437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formulation and Evaluation of Solid Dispersions of Poorly Water-Soluble Drug- Hesperidin 难水溶性药物橙皮苷固体分散体的制备及评价

Letters in Applied NanoBioScience Pub Date : 2022-03-19 DOI: 10.33263/lianbs122.050

{"title":"Formulation and Evaluation of Solid Dispersions of Poorly Water-Soluble Drug- Hesperidin","authors":"","doi":"10.33263/lianbs122.050","DOIUrl":"https://doi.org/10.33263/lianbs122.050","url":null,"abstract":"Hesperidin is a plant-derived flavonoid, abundantly present in the different citrus species, including lemon, orange, lime, and grapefruit. It possesses the diverse biological potential of therapeutic significance, including anti-inflammatory, anti-adipogenic, antioxidant, insulin-sensitizing, antimicrobial, neuroprotective, and anti-carcinogenic activities. The objective of the present study was to enhance the dissolution characteristics of the model drug by increasing the solubility and release rate of hesperidin through solid dispersions using natural polymers by the hot-melt extrusion method. The compatibility analysis was carried out through Fourier Transform-Infrared Spectroscopy (FT-IR) and Differential scanning calorimetry (DSC). The kinetic studies for drug release mechanisms were characterized through zero-order, first-order, Higuchi, Korsmeyer-Peppas, and Hixson-Crowell models. The dissolution analysis of solid dispersions showed exhibited more than 99% drug released. The optimized formulation was found to follow the Higuchi model of drug release kinetics with an R2 value of 0.919. Solid dispersions containing natural polymers prepared through the hot-melt extrusion method exhibited significant enhancement in the release profile compared to a pure drug, hesperidin.","PeriodicalId":18009,"journal":{"name":"Letters in Applied NanoBioScience","volume":"128 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76394773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Synthesis and Evaluation Biological Activity of Six Oxapentacyclo Derivatives on Gram Negative and Gram Postive Bacteria 六种氧五环衍生物的合成及对革兰氏阴性和阳性细菌的生物活性评价

Letters in Applied NanoBioScience Pub Date : 2022-03-18 DOI: 10.33263/lianbs122.043

Figueroa‐Valverde Lauro, D. Francisco, Rosas-Nexticapa Marcela, López-Ramos, Mária, Alvarez-Ramirez Magdalena, M. Virginia, Lopez Gutierrez, Tomáš

引用次数: 0

Evaluation of the Antibacterial Effect of Salvia Officinalis Essential Oil and its Synergistic Effect with Meropenem 鼠尾草精油的抑菌作用及其与美罗培南的协同作用评价

Letters in Applied NanoBioScience Pub Date : 2022-03-18 DOI: 10.33263/lianbs122.044

Ashraf Maher Sulaiman, Ali Saeed Abdulaziz, Amina Mohamed Almutawea, Sarà, A. Alansari, Fatema Mohamed Aldoseri, Salma A. Bekhit, -. SalwaMutlaqAl, Thawadi, S. Alqallaf, A. Bekhit

{"title":"Evaluation of the Antibacterial Effect of Salvia Officinalis Essential Oil and its Synergistic Effect with Meropenem","authors":"Ashraf Maher Sulaiman, Ali Saeed Abdulaziz, Amina Mohamed Almutawea, Sarà, A. Alansari, Fatema Mohamed Aldoseri, Salma A. Bekhit, -. SalwaMutlaqAl, Thawadi, S. Alqallaf, A. Bekhit","doi":"10.33263/lianbs122.044","DOIUrl":"https://doi.org/10.33263/lianbs122.044","url":null,"abstract":"Warnings by WHO concerning the antibacterial resistance was an encouragement to investigate the antibacterial effects of extracted and purchased Salvia officinalis essential oils against S. aureus, L. monocytogenes, S. pyogenes, E. coli, P. aeruginosa, and K. pneumonia by the agar well diffusion method. Besides, the checkerboard method evaluated the potential synergistic antibacterial activity of volatile sage oil and meropenem against multi-drug resistant E. coli. Results showed that the purchased oil did not have antimicrobial activity against any of the tested pathogens, while the extracted oil of S. officinalis inhibited the growth of all the tested microorganisms except the MDR K. pneumonia. The extracted oil showed the highest activity against the E. coli with an IZ of 18±0.4 mm and MIC of 6.25± 0.2 mg/ml, and the lowest activity was recorded against P. aeruginosa with an IZ of 10±0.2 mm and MIC of 25 mg/ml. In addition, SoEO showed a promising synergistic effect with meropenem against MDR E. coli. Results suggest that the EOs of S. officinalis possess antimicrobial activity, and therefore, they can be used to treat infections caused by some pathogens.","PeriodicalId":18009,"journal":{"name":"Letters in Applied NanoBioScience","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86814981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Sugary Foods and Beverages Relationship to Fungal Colonization and Oral Hygiene in School Children 含糖食品和饮料与真菌定植和学童口腔卫生的关系

Letters in Applied NanoBioScience Pub Date : 2022-03-18 DOI: 10.33263/lianbs122.042

Machrumnizar Machrumnizar, Suriyani Tan, Y. Yuliana

{"title":"Sugary Foods and Beverages Relationship to Fungal Colonization and Oral Hygiene in School Children","authors":"Machrumnizar Machrumnizar, Suriyani Tan, Y. Yuliana","doi":"10.33263/lianbs122.042","DOIUrl":"https://doi.org/10.33263/lianbs122.042","url":null,"abstract":"Sugary foods and beverages are highly consumed by children. It is a substrate for fungal growth and has effects on oral hygiene. The study aimed to determine sugary foods and beverages’ relationship to oral fungi and hygiene. This cross-sectional study was conducted on 150 students aged 11-12 years old, selected based on inclusive-exclusive criteria. Demographic data and sugary foods and beverages consumption were recorded in a questionnaire. The oral material was collected and cultured in SDA media. Fungal growth was evaluated microscopically, and then fungal identification used the Integral System YEASTS Plus (Liofilchem®). OHI was used to assess oral hygiene. Results showed that 72.0% were 12 years old, the frequency of sugary foods and beverages consumption was more than once per week in 85 children (56.67 %), mostly girls (30.9%). The fungus found was mostly Candida (55.3%), and 43.3% of children had poor oral hygiene. Statistical analysis showed a significant association between the frequency of sugary foods and beverages consumption with fungal colonization (p<0.05) and oral hygiene (p<0.05). The correlation between fungal colonization and oral hygiene was statistically significant (p<0.05). This study provides insight into the relationships between sugary foods and beverages, fungal colonization, and oral hygiene.","PeriodicalId":18009,"journal":{"name":"Letters in Applied NanoBioScience","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74663550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0