Gold Bulletin最新文献

{"title":"Gold nanomaterials for biochemical sensing","authors":"Liping Tu","doi":"10.1007/s13404-022-00318-8","DOIUrl":"10.1007/s13404-022-00318-8","url":null,"abstract":"<div><h2>Abstract\u0000</h2><div><p>Gold nanomaterials have received much attention in sensing due to their unique optical and electronic properties. This article briefly summarized the synthesis, property of gold nanomaterials before focusing on their application to sensing. The synthesis of three major types of gold nanomaterials is discussed: gold nanoclusters, which are synthesized by templated method, and gold nanoparticles, which are synthesized by chemical reduction methods, and gold nanorods, which are synthesized by the seed-mediated method. More methods affecting nano properties are discussed. Properties of these gold nanomaterials are usually connected to their application. Their fluorescent, photoluminescent, chemiluminescent, electrochemiluminescent, and catalytic properties are what give them potential in sensing. For the further application of gold-based nanomaterials in sense, the author suggests that more research needs to be done on understanding their properties and surface functionalization which provide greater selectivity and sensitivity in sense. Moreover, new detection techniques need to be developed to improve detection accuracy and reduce operational complexity.</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 2","pages":"169 - 185"},"PeriodicalIF":2.2,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4110355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aurocyanide adsorption onto granular activated carbon impregnated with SDS anionic surfactant","authors":"C. Vargas,&nbsp;P. Navarro,&nbsp;E. Mejía,&nbsp;P. Hernández","doi":"10.1007/s13404-022-00314-y","DOIUrl":"10.1007/s13404-022-00314-y","url":null,"abstract":"<div><p>The impregnation of granular activated carbon with the anionic surfactant sodium dodecylsulfate (SDS) was studied and the influence on aurocyanide adsorption was evaluated. Thermodynamic and kinetic parameters were also determined. The impregnation of activated carbon with SDS improves gold adsorption by 10%, showing a cleansing effect on the carbon surface which was displayed in a higher specific surface area. Specific pore volume and average pore diameter did not undergo important changes. Increasing the temperature decreases gold adsorption on modified carbon. The standard enthalpy of adsorption and the activation energy were calculated, getting values of − 41.3 kJ/mol and 15.0 kJ/mol, respectively.</p></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 2","pages":"137 - 143"},"PeriodicalIF":2.2,"publicationDate":"2022-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13404-022-00314-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4973722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gold nanocluster triggering near-infrared photocatalytic oxidations","authors":"Man-Bo Li","doi":"10.1007/s13404-022-00315-x","DOIUrl":"10.1007/s13404-022-00315-x","url":null,"abstract":"<div><h2>Abstract\u0000</h2><div><p>Developing efficient near-infrared photocatalyst for organic transformations is a long but challenging goal. In a recent paper in <i>Journal of the American Chemical Society</i>, Shuxin Wang, Jun Xuan, Manzhou Zhu and co-workers explored the gold nanocluster-triggered near-infrared photocatalytic oxidative functionalization with high efficiency. This work cultivates a new land for the application of metal nanocluster as well as near-infrared photocatalysis.</p></div></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 2","pages":"145 - 147"},"PeriodicalIF":2.2,"publicationDate":"2022-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5032763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytoremediation ability of Helichrysum arenarium plant for Au and Ag: case study at Demirören village (Gümüşhane, Turkey)","authors":"Alaaddin Vural,&nbsp;Semaneh Safari","doi":"10.1007/s13404-022-00313-z","DOIUrl":"10.1007/s13404-022-00313-z","url":null,"abstract":"<div><h2>Abstract\u0000</h2><div><p>It was investigated ability of <i>Helichrysum arenarium</i> plant, in phytoextraction, phytostabilization, and phytoremediation in this study. Soil and plant samples were collected from the Demirören alteration site which has the potential of gold mineralization and analyzed for gold and silver. When the results of the analysis were evaluated, it was determined that the gold and silver contents in the soil did not show compatibility with the gold and silver contents of the plants grown at the same point. It was concluded that the high gold and silver concentrations in the plants are related to the hydrothermal alteration and weathering at the point where the plants grow. For investigation of phytoremediation ability of the plant, translocation factor (TF), bio-concentration factor (BCF), and bioaccumulation factor (BAF) were calculated. The values of TF, BAF, and BCF for Ag are equal 0.33, 0.043, and 0.13 and for Au are equal 2.04, 0.59, and 0.29, respectively. So, obtained data show that <i>Helichrysum arenarium</i> is not appropriate for phytoextraction and phytostabilization of gold and silver in this case, but <i>H. arenarium</i> can be used in phyto-mining and for biogeochemical exploration of gold. Considering that the gold and silver concentrations in the developed soil in the study area are low concentrations, it is predicted that a similar study will yield satisfactory-interesting results when it is made in plants grown on the gold mineralization/enrichment areas.</p></div></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 2","pages":"129 - 136"},"PeriodicalIF":2.2,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13404-022-00313-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4485096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Obituary for Masatake Haruta (1947–2022)","authors":"Toru Murayama,&nbsp;Tamao Ishida","doi":"10.1007/s13404-022-00312-0","DOIUrl":"10.1007/s13404-022-00312-0","url":null,"abstract":"","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 2","pages":"105 - 106"},"PeriodicalIF":2.2,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4764138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of microRNA-21 using gold nanoparticle-DNA conjugates based on colorimetric and fluorescent detection","authors":"Nasrin Zare,&nbsp;Razieh Ghasemi,&nbsp;Laleh Rafiee,&nbsp;Shaghayegh Haghjooy Javanmard","doi":"10.1007/s13404-022-00308-w","DOIUrl":"10.1007/s13404-022-00308-w","url":null,"abstract":"<div><p>The miR-21 detection is essential for the accurate and early diagnosis or prognosis of most diseases. In the current study, the miR-21 detection method was performed based on the exploitation of the simple colorimetric biosensor due to the unique surface plasmon resonance (SPR) absorption of gold nanoparticles. AuNPs were functionalized with the specific DNA probes on the gold surface by Au-SH bond. Two strategies are proposed to detect the miR-21. In the first strategy, probes (DNA1 and DNA2) were complementary to the sequence of the miR-21. When miR-21 is introduced, the hybridization reaction is triggered between the golden nanoparticles- (GNP)-DNA conjugates and targets, resulting in changes in SPR absorption band and macroscopic color of the AuNPs solution. In the second strategy, we used a fluorescence sequence (DNA3-FAM), which was complimentary of DNA1. The DNA3-FAM was released after hybridization of miR-21 with DNA1 and DNA2. The free DNA3-FAM sequences in plate wells containing 1% agarose gel were assessed by fluorescent microscope. The combination of two strategies and conventional equipment such as UV–Vis spectrometers and fluorescent microscopes could be useful in detecting the desired miRNAs (miR-21).</p></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 2","pages":"107 - 114"},"PeriodicalIF":2.2,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4617605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formation of gold hollow spheres by rapid heating–cooling process","authors":"Lin Zhang,&nbsp;Jianjun Zhang,&nbsp;Quan Zheng,&nbsp;Ying Xu,&nbsp;Xinli Kou,&nbsp;Tao Li","doi":"10.1007/s13404-022-00311-1","DOIUrl":"10.1007/s13404-022-00311-1","url":null,"abstract":"<div><p>Although gold hollow spheres show unique advantages in fields like catalysis, the available synthesis strategies have low atom and economic efficiency. In this paper, Au hollow spheres were produced by combining simple wet chemical method and rapid heating–cooling process, in which rapid temperature rise caused Au evaporation and rapid cooling froze gold “bubbles.” The control experiments confirmed the presence of supports which limit the growth and sintering of Au nanoparticles to some extent, and slower heating rate inhibits the hollowing of gold sphere. This work provides a new strategy for the rapid and facile synthesis of Au hollow spheres, offering a wide range of possibilities for energy storage and biosensing applications.</p></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 2","pages":"115 - 121"},"PeriodicalIF":2.2,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4348790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of gold, silver, and iron nanoparticles using isolated berberine: its characterization and antimicrobial and cytotoxic activities against COLO320DM and Hela cells","authors":"Mangesh A. Bhutkar,&nbsp;Dheeraj S. Randive,&nbsp;Somnath D. Bhinge,&nbsp;Ganesh H. Wadkar,&nbsp;Sachin S. Todkar,&nbsp;Kiran P. Shejawal","doi":"10.1007/s13404-022-00309-9","DOIUrl":"10.1007/s13404-022-00309-9","url":null,"abstract":"<div><h2>Abstract\u0000</h2><div><p>The current report discloses the development of gold, silver, and iron nanoparticles using berberine by green synthesis and its evaluation for antimicrobial activity and in vitro cytotoxicity against colon cancer and human cervical cancer cells. The prepared nanoparticles were characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction analysis. The characterization of results of the prepared nanoparticles satisfied the distinctive properties of the potent nanodrug. The antimicrobial potential was exhibited by all the prepared nanoparticles against the selected microbial strains. The zone of inhibition (mm) exhibited by gold nanoparticles biosynthesized using berberine (BAuNPs) was 15.66 ± 0.47 mm against <i>Pseudomonas aeruginosa</i>, 15.0 ± 1.41 against <i>Escherichia coli</i>, and 15.33 ± 1.24 mm against <i>Staphylococcus aureus</i>. The cytotoxicity study exhibited promising results as compared to pure berberine. The results of the MTT assay of gold nanoparticles against COLO320DM exhibited 92.27 ± 0.14% inhibition, whereas in the case of the SRB assay, it revealed 89.72 ± 0.29% inhibition as compared to other nanoparticles and pure berberine. For Hela cell lines, in the case of the MTT assay, BAuNPs exhibited 92.13 ± 0.64% inhibition while in the SRB assay, it revealed 85.56 ± 0.39% inhibition. The results of the Trypan blue assay revealed that BAuNPs showed 76.54 ± 1.00% inhibition against the COLO320DM cell line, whereas in the case of Hela cell lines, 78.03 ± 1.47% inhibition was observed. The effect exhibited by BAuNPs may be attributed to increased production of reactive oxygen species by treated carcinoma cells that results in oxidation of vital constituents which ultimately causes death of the cell. Thus, these in vitro results demonstrate the promising therapeutic applications of the BAuNPs in nanomedicine.</p></div></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 1","pages":"93 - 103"},"PeriodicalIF":2.2,"publicationDate":"2022-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4715737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of polyampholyte derivative of chitosan with bisphthalimides of low molecular weight in the green synthesis of Au nanoparticles","authors":"Martín Caldera Villalobos,&nbsp;Miguel Ángel García Castro,&nbsp;Jesús García Serrano,&nbsp;Ana M. Herrera González","doi":"10.1007/s13404-022-00310-2","DOIUrl":"10.1007/s13404-022-00310-2","url":null,"abstract":"<div><h2>\u0000Abstract\u0000</h2><div><p>This work reports the chemical modification of chitosan with phthalimide moieties and the synthesis of two bisphthalimides (BPIs) with low molecular weight useful in the green synthesis of Au nanoparticles. The polyampholyte derivative of chitosan was obtained in water while the two BPIs, <i>N,N´</i>-(1,3-phenylene)bis(phthalimide-5-carboxylic acid) (BPI-1) and <i>N,N´</i>-(1,4-phenylene)bis(phthalimide-5-carboxylic acid) (BPI-2) were obtained by solid state reaction without the use of organic solvents. The polyampholyte and two BPIs were soluble in water; therefore, they were used in the green synthesis of Au nanoparticles. The characterization of three compounds was made by FTIR and ¹H NMR. TEM and UV–Vis results revealed that the compounds can reduce gold ions and stabilize Au nanoparticles in the colloidal solutions. The shape of the Au nanoparticles was quasi-spherical, while the average size of Au nanoparticles stabilized with the compounds BPI-1 and BPI-2 was 3 and 12 nm, respectively. Thus, with BPI-1 was obtained Au nanoparticles with lower size than BPI-2. Finally, the average size of nanoparticles stabilized with the polyampholyte was 10 nm. However, the faster reaction to obtain nanoparticles was with the polyampholyte derivative of chitosan (5 min), due to high quantity of oxidizable groups found in the polymer structure by its high molecular weight.</p></div></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 1","pages":"41 - 51"},"PeriodicalIF":2.2,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4601532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergic effect of paclitaxel and cisplatin associated with gold nanoparticles on HeLa cervical cells","authors":"Maria Laura Rodrigues Uggioni,&nbsp;Paulo Emilio Feuser,&nbsp;Jonathann Corrêa Possato,&nbsp;Maria Eduarda de Melo,&nbsp;Ellen De Pieri,&nbsp;Rodrigo Cercena,&nbsp;Alexandre Gonçalves Dal Bó,&nbsp;Maria Inês da Rosa,&nbsp;Ricardo Andrez Machado-de-Ávila","doi":"10.1007/s13404-021-00305-5","DOIUrl":"10.1007/s13404-021-00305-5","url":null,"abstract":"<div><h2>Abstract  </h2><div><p>The combination of two or more chemotherapy drugs and nanotechnology has emerged as an effective strategy in the fight against cancer. Paclitaxel (PTX) and cisplatin show improved cytotoxic effects on being used together in the chemotherapy of various cancer types, than when used individually. However, these chemotherapy drugs have been shown to have numerous toxic effects in cancer patients. Therefore, the aim of this study was to evaluate the cytotoxicity of PTX and cisplatin associated with gold nanoparticles (AuNps) on HeLa cells containing multiple copies of human papillomavirus 18. AuNps were successfully synthesized with a mean size of 20 to 61 nm, polydispersity index ≥ 0.3, and negative surface charge. Together, PTX and cisplatin associated with AuNps showed a higher cytotoxic effect on HeLa cells than free drugs. The combination of PTX and cisplatin with AuNps potentiated their cytotoxic effects, inducing synergism between the treatments, resulting in HeLa cell death by apoptosis.</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div></div>","PeriodicalId":55086,"journal":{"name":"Gold Bulletin","volume":"55 1","pages":"65 - 75"},"PeriodicalIF":2.2,"publicationDate":"2022-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4858264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}