GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 11
    Online Resource
    Online Resource
    Uncovering Adenosine‐Specific Signals: A Label‐Free Aptamer‐Based Approach with Gold Nanoparticles for Specific Detection
    Wiley ; 2023
    In:  ChemistrySelect Vol. 8, No. 27 ( 2023-07-20)
    Details
    In: ChemistrySelect, Wiley, Vol. 8, No. 27 ( 2023-07-20)
    Abstract: We present a novel colorimetric aptasensing method for specific adenosine (Ade) detection based on complementary aptamer hybridization and gold nanoparticles (AuNPs). Unlike traditional approaches, our method overcomes limitations of selectivity and specificity by incorporating an additional step involving the complementary strand of the aptamer (c‐Ade aptamer) after incubating Ade with the aptamer. In the absence of Ade, the c‐Ade aptamer hybridizes with the aptamer, causing AuNPs aggregation and a blue color change. However, in the presence of Ade, the aptamer‐bound target prevents hybridization, allowing the free c‐Ade aptamer to adsorb onto the AuNPs, resulting in a red color change. This unique color reversal distinguishes our approach from conventional label‐free methods. We optimized the detection conditions, including incubation time and salt concentration, to enhance sensitivity and reproducibility. The calibration curve exhibited a linear relationship between the colorimetric response and Ade concentration, with a limit of detection of 3.0±0.8 nM. Our method demonstrated excellent selectivity for Ade, even in the presence of structurally similar interfering compounds. Furthermore, we successfully applied our approach to detect Ade in complex biological samples with minimal sample preparation. Our colorimetric aptasensing method offers a simple, cost‐effective, and specific tool for detecting targets in various applications.
    Type of Medium: Online Resource
    ISSN: 2365-6549 , 2365-6549
    URL: Issue
    URL: Article
    DOI: 10.1002/slct.v8.27
    DOI: 10.1002/slct.202302282
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2844262-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 12
    Online Resource
    Online Resource
    The prevalence of job stressors among nurses in private in vitro fertilization (IVF) centres
    Wiley ; 2019
    In:  Nursing Open Vol. 6, No. 1 ( 2019-01), p. 39-49
    Details
    In: Nursing Open, Wiley, Vol. 6, No. 1 ( 2019-01), p. 39-49
    Abstract: The primary aim of this study was to identify the level of stress and the stressors having an impact on nurses compared with other medical workers in private IVF centres. Background Stressful working conditions can an adversely affect not only the health and well‐being of health professionals but also subsequently to patient outcomes if care is given to infertile couples. This is of relevance particularly in view of Vietnam's recent economic growth and the increase in the number of private IVF centres. This is the first study looking at the levels of stress experienced by health workers (especially nurses) providing IVF services. Design A cross‐sectional survey. Methods All health workers in seven IVF Clinics in HCMC were invited to complete an Occupational Stress Index (OSI) questionnaire. Results Of the invited 131 medical professionals, 105 (80%) completed the confidential self‐administered questionnaire. Thirty‐five participants (33.3%) were nurses, 19 (18.1%) were doctors and 51 (48.6%) were lab technicians. Approximately two‐thirds reported not having children (67.6%), half (50.48%) married and three‐quarters (76.2%) were women, with a significant difference by medical worker group ( p   〈  0.05). Among the three groups, nurses have higher occupational stress index score compared with the others. The OSI score only had a strong relationship with the “high demand” ( p   〈  0.001). Some demographic variables (e.g., income, long working hours, education level) statistically represented the high significant source of job stress.
    Type of Medium: Online Resource
    ISSN: 2054-1058 , 2054-1058
    URL: Issue
    URL: Article
    DOI: 10.1002/nop2.2019.6.issue-1
    DOI: 10.1002/nop2.187
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2809556-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 13
    Online Resource
    Online Resource
    Cost-Effective Tween 80-Capped Copper Nanoparticles for Ultrasensitive Colorimetric Detection of Thiram Pesticide in Environmental Water Samples
    Wiley ; 2021
    In:  Journal of Nanomaterials Vol. 2021 ( 2021-10-21), p. 1-10
    Details
    In: Journal of Nanomaterials, Wiley, Vol. 2021 ( 2021-10-21), p. 1-10
    Abstract: Thiram plays a critical role in protecting fruits and vegetables from damage by various crop diseases, but its residues significantly affect the environment, such as soil and water pollution, and becoming a serious threat to human health. Herein, Tween 80-capped copper nanoparticles (Tween 80-CuNPs) were developed as a convenient and low-cost colorimetric probe for selective detection of thiram pesticide. In the presence of thiram, the color of Tween 80-capped CuNPs changed from dark brown to olive green and colorless at high thiram concentrations. The Tween 80-capped CuNPs-based colorimetric probe exhibited good selectivity and high sensitivity (LOD about 0.17 μM) with a high linearity level in the calibration range of 0.5–25 μM of thiram concentrations. The thiram limit of detection (LOD) of proposed sensor is lower than the maximum residue limit (MRL) regulated by the governments of EU and Vietnam. Moreover, the proposed sensor was successfully applied to determine thiram in tap water with percentage recovery of 98-107% and high repeatability ( RSD = 1.9 % ). The obtained results indicated that Tween 80-capped CuNPs would become a cost-effective sensing platform for ultrahigh-sensitive thiram determination in the environmental water samples.
    Type of Medium: Online Resource
    ISSN: 1687-4129 , 1687-4110
    URL: Article
    DOI: 10.1155/2021/5513401
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2229480-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 14
    Online Resource
    Online Resource
    Loại bỏ màu thuốc nhuộm reactive yellow 160 bằng kỹ thuật fenton dị thể sử dụng bùn đỏ biến tính
    Wiley ; 2018
    In:  Vietnam Journal of Chemistry Vol. 56, No. 1 ( 2018-02), p. 104-110
    Details
    In: Vietnam Journal of Chemistry, Wiley, Vol. 56, No. 1 ( 2018-02), p. 104-110
    Abstract: In this paper, iron‐modified red mud was used as a heterogeneous Fenton catalyst for the degradation of Reactive Yellow 160 (RY 160). Raw and modified red mud samples were characterized by scanning electron scopy (SEM), Energy dispersive X‐ray spectroscopy (EDX), and BET analysis. The experimental results indicated that under the optimum conditons for the degradation of RY 160 including catalyst dose of 1.5 g/L, hydrogen peroxide dose of 1.96 mM, and pH 2, the decolorization efficiency of 99.2 % was achieved within 60 min. Kinetics studies showed that the decolorization of RY 160 on iron‐modified red mud catalyst follows a pseudo‐first order reaction with the reaction rate constant of 0.0383 min ‐1 (R 2  = 0.9939), Activation energy of 31.9 kJ/mol, R 2  = 0.9804.
    Type of Medium: Online Resource
    ISSN: 2572-8288 , 2572-8288
    URL: Article
    DOI: 10.15625/vjc.2018-0013
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2414570-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 15
    Online Resource
    Online Resource
    ARID1A‐SIN3A drives retinoic acid‐induced neuroblastoma differentiation by transcriptional repression of TERT
    Wiley ; 2019
    In:  Molecular Carcinogenesis Vol. 58, No. 11 ( 2019-11), p. 1998-2007
    Details
    In: Molecular Carcinogenesis, Wiley, Vol. 58, No. 11 ( 2019-11), p. 1998-2007
    Abstract: Aggressive, high‐risk neuroblastoma (NB) exhibits an immature differentiation state, profound epigenetic dysregulation and high telomerase activity. It has been suggested that aggressive NB may be treatable by inducing differentiation whereas therapeutic targeting of telomerase is under investigation for multiple cancer types. While epigenetic regulation of the telomerase reverse transcriptase ( TERT ) promoter has been described in high‐risk NB, the exact molecular mechanisms are still not completely understood. Here we used quantitative real‐time polymerase chain reaction (PCR), chromatin immunoprecipitation qPCR, quantitative telomeric repeat amplification protocol, and immunoblot techniques to investigate epigenetic regulation of TERT in wild‐type and genetically modified NB cell lines. We demonstrated that TERT expression is reduced during 13‐ cis retinoic acid‐induced NB differentiation and that this inversely correlated with increased expression of AT‐rich interaction domain 1A (ARID1A), a subunit of the SWItch/sucrose nonfermentable chromatin remodeling complex. We showed that ARID1A directly caused suppression of TERT and was reliant on DNA binding and co‐occupancy of the TERT promoter by the SIN3 transcription regulator family member A (SIN3A) repressor complex allowing NB differentiation to proceed. Finally, using data from NB patient cohorts, we reported a significant correlation between low ARID1A expression, elevated expression of TERT, and poorly differentiated, high‐risk NB. These results provide insights into a key epigenetic pathway responsible for modulating TERT‐driven NB progression, which could represent a target for therapeutic intervention.
    Type of Medium: Online Resource
    ISSN: 0899-1987 , 1098-2744
    URL: Issue
    URL: Article
    DOI: 10.1002/mc.v58.11
    DOI: 10.1002/mc.23091
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2001984-1
    detail.hit.zdb_id: 1004029-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 16
    Online Resource
    Online Resource
    Synthesis of Valsartan as drug for the treatment of hypertension
    Wiley ; 2019
    In:  Vietnam Journal of Chemistry Vol. 57, No. 3 ( 2019-06), p. 343-346
    Details
    In: Vietnam Journal of Chemistry, Wiley, Vol. 57, No. 3 ( 2019-06), p. 343-346
    Abstract: The synthesis of valsartan ( 1 ), one of the most currently used pharmaceutical agent in antihypertensive therapy, was described through five steps in an overall yield of 54 % starting from 4’‐methyl‐2‐cyanobiphenyl ( 2 ). The key step involved tetrazole ring formation catalyzed by Lewis acid. The structures of synthesized compounds were confirmed by means of NMR and MS spectroscopíe.
    Type of Medium: Online Resource
    ISSN: 2572-8288 , 2572-8288
    URL: Issue
    URL: Article
    DOI: 10.1002/vjch.v57.3
    DOI: 10.1002/vjch.201900038
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2414570-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 17
    Online Resource
    Online Resource
    Typhonium kbangense , a new species of Araceae (Aroidea–Areae) from Central Vietnam
    Wiley ; 2022
    In:  Nordic Journal of Botany Vol. 2022, No. 8 ( 2022-08)
    Details
    In: Nordic Journal of Botany, Wiley, Vol. 2022, No. 8 ( 2022-08)
    Abstract: Typhonium kbangense is described as a new species from Vietnam. It is one of eleven species recently found in central and southern Vietnam. It belongs to the pedate leaf blade group of species and is closest to T. bachmaense and T. dongnaiense , but is differentiated from the two latter by having much longer sterile flowers, not dense as in T. dongnaiense , and without being clavate apically as in T. bachmaense . A table of morphological characters for the three species, the ecological characteristics, specific habitat and conservation status of the new species are estimated and provided.
    Type of Medium: Online Resource
    ISSN: 0107-055X , 1756-1051
    URL: Issue
    URL: Article
    DOI: 10.1111/njb.v2022.i8
    DOI: 10.1111/njb.03601
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 763370-1
    detail.hit.zdb_id: 2406507-9
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 18
    Online Resource
    Online Resource
    Synthesis and Characterizations of Biobased Copolymer Poly(ethylene-co-butylene 2,5-Furandicarboxylate)
    Wiley ; 2021
    In:  International Journal of Polymer Science Vol. 2021 ( 2021-8-7), p. 1-8
    Details
    In: International Journal of Polymer Science, Wiley, Vol. 2021 ( 2021-8-7), p. 1-8
    Abstract: Homopolymers and copolymers derived from 2,5-furandicarboxylic acid have been extensively studied for their potential in the development of sustainable plastics. This research definitely spotlighted the synthesis of poly(ethylene-co-butylene 2,5-furandicarboxylate) copolymer via the two-step melting polycondensation with various ethylene glycol/1,4-butanediol molar ratios. The structural characterization of the obtained biobased copolymer was carried out by ATR-FTIR and 1H NMR. The average molecular weight of the obtained copolymer was determined by the intrinsic viscosity measurements. It was found that ethylene glycol was preferentially incorporated into the copolymer structures when the molecular weight of the products was not high enough ( 〉 18000). The decomposition of two types of monomer units of the obtained copolymer was proven through the degradation two-step process by TGA measurements.
    Type of Medium: Online Resource
    ISSN: 1687-9430 , 1687-9422
    URL: Article
    DOI: 10.1155/2021/9104546
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2520688-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 19
    Online Resource
    Online Resource
    HO ● ‐ initiated oxidation of isoleucine amino acid in the aqueous phase
    Wiley ; 2023
    In:  Vietnam Journal of Chemistry Vol. 61, No. S1 ( 2023-07), p. 37-44
    Details
    In: Vietnam Journal of Chemistry, Wiley, Vol. 61, No. S1 ( 2023-07), p. 37-44
    Abstract: Protein damage by the direct oxidative attack on amino acid side chains is considered the main cause of human aging and diseases. Therefore, a better understanding of the oxidation process is necessary for screening and designing new drugs. In this work, the oxidation of L‐isoleucine (Ile) by HO ● radical was mechanistically and kinetically studied using M05‐2X/6‐311++G(3df,3pd)//M05‐2X/6‐311++G(d,p) level of theory. All possible hydrogen transfer (HT) and single electron transfer (SET) reactions are considered in the aqueous phase. The results showed that the overall diffusion‐controlled rate constant is equal to 4.82×10 9 M ‐1 s ‐1 at 298.15K. The zwitterionic form is the main existing form that plays an essential role in the HO ● ‐ initiated oxidation of Ile (99.98%). The most preponderant reactions are found at C6‐H (36.19%) and C8‐H (37.77%) positions. Finally, the influence of temperature on the overall rate is also evaluated.
    Type of Medium: Online Resource
    ISSN: 2572-8288 , 2572-8288
    URL: Issue
    URL: Article
    DOI: 10.1002/vjch.v61.S1
    DOI: 10.1002/vjch.202200210
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2414570-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 20
    Online Resource
    Online Resource
    Fishers, dams, and the potential survival of the world's rarest turtle, Rafetus swinhoei , in two river basins in northern Vietnam
    Wiley ; 2020
    In:  Aquatic Conservation: Marine and Freshwater Ecosystems Vol. 30, No. 6 ( 2020-06), p. 1074-1087
    Details
    In: Aquatic Conservation: Marine and Freshwater Ecosystems, Wiley, Vol. 30, No. 6 ( 2020-06), p. 1074-1087
    Abstract: Next to cetaceans and megafishes, freshwater turtles are the most iconic endangered freshwater species. A detailed questionnaire survey conducted with more than 100 individuals from fishing communities in northern Vietnam was used to investigate the current status of Southeast Asian turtles and provides new hope concerning the survival of Rafetus swinhoei , for which recent official records in the wild are limited to a single individual in Vietnam. The survey included the entire Vietnamese portion of the Da River in Hoa Binh and Son La provinces, as well as the Chu and Ma river system in Thanh Hoa Province, as they are the last sites where the world's rarest and largest Asian softshell turtle has been seen. The questionnaire, conducted in Vietnamese, focused on demographic details, fishing intensity and gear, the status of fishing grounds, and the frequency of interaction with turtles. The great majority of fishers could recognize different turtle species from photographs and describe their preferential breeding habitats; not all knew that they are protected. A few confirmed that more than once each year they still encounter freshwater turtles during their fishing activities. This survey provides detailed information on sites where freshwater turtles are still seen in northern Vietnam and broadens our hope that wild individuals of the extremely rare R. swinhoei may still be present in the remaining riparian wetlands of these biodiverse, dammed, and controlled river basins in North Vietnam.
    Type of Medium: Online Resource
    ISSN: 1052-7613 , 1099-0755
    URL: Issue
    URL: Article
    DOI: 10.1002/aqc.v30.6
    DOI: 10.1002/aqc.3317
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1146285-1
    detail.hit.zdb_id: 1496050-3
    SSG: 12
    SSG: 14
    SSG: 21
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...