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  • 1
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    Gambierdiscus (Gonyaulacales, Dinophyceae) diversity in Vietnamese waters with description of G. vietnamensis sp. nov.
    Wiley ; 2023
    In:  Journal of Phycology Vol. 59, No. 3 ( 2023-06), p. 496-517
    Details
    In: Journal of Phycology, Wiley, Vol. 59, No. 3 ( 2023-06), p. 496-517
    Abstract: Viet Nam has a coastline of 3200 km with thousands of islands providing diverse habitats for benthic harmful algal species including species of Gambierdiscus . Some of these species produce ciguatera toxins, which may accumulate in large carnivore fish potentially posing major threats to public health. This study reports five species of Gambierdiscus from Vietnamese waters, notably G. australes , G. caribaeus , G. carpenteri , G. pacificus , and G. vietnamensis sp. nov. All species are identified morphologically by LM and SEM, and identifications are supported by molecular analyses of nuclear rDNA (D1–D3 and D8–D10 domains of LSU, SSU, and ITS1‐5.8S‐ITS2 region) based on cultured material collected during 2010–2021. Statistical analyses of morphometric measurements may be used to differentiate some species if a sufficiently large number of cells are examined. Gambierdiscus vietnamensis sp. nov. is morphologically similar to other strongly reticulated species, such as G. belizeanus and possibly G. pacificus ; the latter species is morphologically indistinguishable from G. vietnamensis sp. nov., but they are genetically distinct, and molecular analysis is deemed necessary for proper identification of the new species. This study also revealed that strains denoted G. pacificus from Hainan Island (China) should be included in G. vietnamensis sp. nov.
    Type of Medium: Online Resource
    ISSN: 0022-3646 , 1529-8817
    URL: Issue
    URL: Article
    DOI: 10.1111/jpy.v59.3
    DOI: 10.1111/jpy.13326
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 281226-5
    detail.hit.zdb_id: 1478748-9
    SSG: 12
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  • 2
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    A beneficiation study to recover xenotime minerals from rich‐iron‐silicate ores
    Wiley ; 2023
    In:  The Canadian Journal of Chemical Engineering
    Details
    In: The Canadian Journal of Chemical Engineering, Wiley
    Abstract: The Yen Phu (YP) rare‐earth mine, located in Yen Bai, Vietnam, currently reserves 28,000 tons of total rare earth oxides (TREO) with a TREO grade of about 1.16%. A mineralogy study shows the dominance of iron‐oxide‐ and silicate‐bearing minerals in YP ore, whereas xenotime presents as the major rare‐earth metal (REM) bearing mineral. Chemical analyses also exhibit a relatively high proportion of heavy rare earth metals (HREMs) at 41.2%, which suggests the high economic value of YP ores. The factors influencing the flotation involving the pH, the depressant, and the collector dosage were first assessed. Then, a beneficiation flowsheet including grinding, wet magnetic separation, and flotation was recommended and practically conducted to enrich the TREO. The proposed process successfully promoted the TREO grade from 1.16% to 29.70% with a high recovery of 80.31% in the REM concentrates, while a tiny loss of TREO was exhibited in the tailing. The chemical analysis of REM concentrates also demonstrated the conservation of REM composition throughout the beneficiation.
    Type of Medium: Online Resource
    ISSN: 0008-4034 , 1939-019X
    URL: Article
    DOI: 10.1002/cjce.25038
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 240250-6
    detail.hit.zdb_id: 2119520-1
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  • 3
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    Toxigenic strains of Azadinium poporum (Amphidomataceae, Dinophyceae) from Japan and Vietnam, with first reports of A. poporum (ribotype A) and A. trinitatum in Asian Pacific
    Wiley ; 2021
    In:  Phycological Research Vol. 69, No. 3 ( 2021-07), p. 175-187
    Details
    In: Phycological Research, Wiley, Vol. 69, No. 3 ( 2021-07), p. 175-187
    Abstract: Morphology and phylogeny of small armored dinoflagellate Azadinium species isolated from Japanese and Vietnamese coasts were examined by light microscopy, scanning electron microscopy and molecular phylogeny inferred from ITS and LSU rDNA (D1–D3) sequences. Dominant azaspiracids (AZAs) were analyzed by using liquid chromatography/triple quadrupole mass spectrometer (LC/MS/MS). Sixteen and four culture strains were established from Japan and Vietnam, respectively. A phylogenetic tree confirmed our species identifications of Japanese cultures as Azadinium poporum (ribotypes A, B and C), A. trinitatum and A. zhuanum , and Vietnamese cultures as A. poporum (ribotype B). Typical cells of A. poporum had the thecal tabulation of Po, cp, X, 4′, 3a, 6″, 6C, 5S, 6″′, 2″″, A. trinitatum had Po, cp, X, 4–5′, 3a, 6–7″, 6C, 5S, 5–6″′, 2″″ and A. zhuanum had Po, cp, X, 3–4′, 2a, 6″, 6C, 5S, 6″′, 2″″. Cellular morphology of the three species were congruent with those in the original reports, in terms of the presence/absence of antapical spine and the position of the ventral pore, nucleus and pyrenoids, although small differences were also found in the nucleus position of A. trinitatum and A. zhuanum . AZA‐2 was the dominant component in Japanese A. poporum (ribotypes A, B and C), and AZA‐40 in Vietnamese A. poporum (ribotype B). AZA‐2 and AZA‐40 were not detected in Vietnamese and Japanese A. poporum , respectively. AZA analogs were not detected from A. trinitatum and A. zhuanum . This is the first report of the toxigenic A. poporum from Japan and Vietnam, with identifications of the major AZAs. The ribotype A of A. poporum and A. trinitatum were the first records in Asia.
    Type of Medium: Online Resource
    ISSN: 1322-0829 , 1440-1835
    URL: Issue
    URL: Article
    DOI: 10.1111/pre.v69.3
    DOI: 10.1111/pre.12455
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2020835-2
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  • 4
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    Urinary neutrophil gelatinase‐associated lipocalin predicted to contrast‐associated acute kidney injury after planned percutaneous coronary intervention in elderly patients
    Wiley ; 2022
    In:  Journal of Clinical Laboratory Analysis Vol. 36, No. 12 ( 2022-12)
    Details
    In: Journal of Clinical Laboratory Analysis, Wiley, Vol. 36, No. 12 ( 2022-12)
    Abstract: To determine the proportion of contrast‐associated acute kidney injury (CA‐AKI) after percutaneous coronary intervention (PCI) and the predictive value of urine neutrophil gelatinase‐associated lipocalin (uNGAL) for CA‐AKI in elderly patients with chronic coronary artery disease. Methods A total of 509 patients who had planned percutaneous coronary intervention (mean age was 63.58 ± 11.63 years and 63.3% of males) were divided into two groups: group 1 ( n  = 153; elderly patients) with ≥70 years old and group 2 ( n  = 356) with 〈 70 years old. Urine NGAL was measured by the ELISA method. Clinical and laboratory data were collected on the day before intervention. CA‐AKI was defined based on Kidney Disease: Improving Global Outcomes criteria. Results The ratio of CA‐AKI in group 1 was 23.5% which was higher than that of group 2 (8.7%) with a p ‐value  〈  0.001. Urine NGAL level in group 1 was significantly higher than that of group 2 [31.3 (19.16–55.13) ng/ml vs. 19.86 (13.21–29.04) ng/ml, p   〈  0.001]. At a cut‐off value of 44.43 ng/ml, uNGAL had a predictive value for CA‐AKI in all patients (AUC = 0.977, p   〈  0.001). Especially at a cut‐off value of 44.14 ng/ml, uNGAL had a predictive value for CA‐AKI in elderly patients (AUC = 0.979, p   〈  0.001). Conclusions The rate of CA‐AKI after PCI in elderly patients was 23.5%. Urine NGAL before PCI had a good predictive value for CA‐AKI in elderly patients with chronic coronary artery disease.
    Type of Medium: Online Resource
    ISSN: 0887-8013 , 1098-2825
    URL: Issue
    URL: Article
    DOI: 10.1002/jcla.v36.12
    DOI: 10.1002/jcla.24757
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2001635-9
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  • 5
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    Orange‐Red‐emitting Ca 9 Gd(PO 4 ) 7 :Eu 3+ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED
    Wiley ; 2021
    In:  ChemistrySelect Vol. 6, No. 5 ( 2021-02-04), p. 937-944
    Details
    In: ChemistrySelect, Wiley, Vol. 6, No. 5 ( 2021-02-04), p. 937-944
    Abstract: Orange‐red‐emitting Eu 3+ ‐doped Ca 9 Gd(PO 4 ) 7 phosphors have been obtained by a sol‐gel technique. These phosphors, excited by UV (270 nm) and near UV light (394 nm), emit orange‐red light in the range of 580–710 nm. The Ca 9 Gd(PO 4 ) 7 :7 mol% Eu 3+ phosphor annealed at 1100 °C shows the highest PL intensity. Judd‐Ofelt analysis reveals that the neighbor surroundings of Eu 3+ ions are asymmetric, and the lowest asymmetry value is found at the dopant ratio of 7 mol%. The optimal phosphor excited by the wavelength of 394 nm displays an excellent thermal stability (∼76.4 % at 160 °C) with an activation energy of 0.163 eV. The corresponding CIE chromaticity coordinates (x; y) and color purity are calculated to be (0.5849; 0.3635) and 84.6 %, respectively. The quantum efficiency values of the Ca 9 Gd(PO 4 ) 7 :Eu 3+ phosphors coated on UV and near‐UV chips are 87.4 % and 5.1 %, respectively. It is the first time that the QE values of Ca 9 Gd(PO 4 ) 7 :Eu 3+ ‐based red and blue‐emitting LEDs are reported.
    Type of Medium: Online Resource
    ISSN: 2365-6549 , 2365-6549
    URL: Issue
    URL: Article
    DOI: 10.1002/slct.v6.5
    DOI: 10.1002/slct.202003891
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2844262-3
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  • 6
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    Predicting 3‐year mortality based on the tumor necrosis factor alpha concentration in low‐flux hemodialysis patients
    Wiley ; 2020
    In:  Therapeutic Apheresis and Dialysis Vol. 24, No. 5 ( 2020-10), p. 554-560
    Details
    In: Therapeutic Apheresis and Dialysis, Wiley, Vol. 24, No. 5 ( 2020-10), p. 554-560
    Abstract: Tumor necrosis factor alpha (TNF‐α) is an inflammatory cytokine produced during acute inflammation. Few studies have evaluated the association between serum TNF‐α and its receptors and their clinical outcomes in hemodialysis patients. However, a study assessing patients using a low‐flux dialyzer reuse has not been conducted yet. The serum TNF‐α concentrations of 319 prevalent hemodialysis patients (mean age, 45 ± 15 years; median duration of hemodialysis, 48 [interquartile range, 26‐79] months; 185 males and 134 females) was examined to predict their 3‐year mortality. The patients were divided into tertiles according to their serum TNF‐α concentrations: T1 (n = 106; serum TNF‐α concentration, 〈 41.22 pg/mL), T2 (n = 106; serum TNF‐α level, from 41.22 to 67.28 pg/mL), and T3 (n = 107; serum TNF‐α concentration, ≥ 67.29 pg/mL). During the 36‐month follow‐up period, a total of 50 (15.7%) patients died from all causes. The Kaplan‐Meier analysis revealed that the all‐cause mortality in T3 was significantly higher compared to that in T1 and T2 (log‐rank test, P 〈  .001). The serum TNF‐α level was a significant predictor for all‐cause mortality (area under the curve = 0.887, P 〈  .001, cutoff value, 89.812 pg/mL, sensitivity = 76%, specificity = 96.3% ) . The serum TNF‐α level was a better predictor of mortality than the duration of hemodialysis and serum albumin, serum high‐sensitivity C‐reactive protein, and serum beta‐2 microglobulin concentrations. The serum TNF‐α concentration was a good predictor of the 3‐year mortality in low‐flux hemodialysis patients.
    Type of Medium: Online Resource
    ISSN: 1744-9979 , 1744-9987
    URL: Issue
    URL: Article
    DOI: 10.1111/tap.v24.5
    DOI: 10.1111/1744-9987.13463
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2010864-3
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  • 7
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    Optimization of spray‐drying process to manufacture green tea powder and its characters
    Wiley ; 2021
    In:  Food Science & Nutrition Vol. 9, No. 12 ( 2021-12), p. 6566-6574
    Details
    In: Food Science & Nutrition, Wiley, Vol. 9, No. 12 ( 2021-12), p. 6566-6574
    Abstract: Tea leaves ( Camellia sinensis ) have many health benefits due to their abundance of polyphenols with antioxidant activity, most notably epigallocatechin‐3‐gallate (EGCG). To protect those bioactive compounds, the spray‐drying technique of green tea‐extracted solution is conducted because of encapsulating. This study aimed to optimize the spray‐drying condition using the response surface methodology (RSM) with respect to the maximal polyphenol content of the product. Furthermore, the characterizations of resulting powder were determined. The results showed that optimal spray‐drying temperature, input flow rate, and whey protein isolate (WPI) content were evaluated at 136℃, 6.8 rpm, and 10.3% of dry basis, respectively. The obtained green tea powder products, which got from optimal spray‐drying process, achieved total polyphenol content (TPC), EGCG, and caffeine content of 322.06 mg GAE/g, 11.4%, and 2.8% of dry basis, respectively. This result revealed the feasibility of green tea leaves to produce tea powder rich in EGCG and polyphenols by spray‐drying technique, potentially contributing to the diversification of tea products.
    Type of Medium: Online Resource
    ISSN: 2048-7177 , 2048-7177
    URL: Issue
    URL: Article
    DOI: 10.1002/fsn3.v9.12
    DOI: 10.1002/fsn3.2597
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2703010-6
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  • 8
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    Photocatalytic degradation and heat reflectance recovery of waterborne acrylic polymer/ZnO nanocomposite coating
    Wiley ; 2020
    In:  Journal of Applied Polymer Science Vol. 137, No. 37 ( 2020-10-05)
    Details
    In: Journal of Applied Polymer Science, Wiley, Vol. 137, No. 37 ( 2020-10-05)
    Abstract: This work aims to clarify the photocatalytic degradation mechanism and heat reflectance recovery performance of waterborne acrylic polymer/ZnO nanocomposite coating. To fabricate the nanocomposite coating, ZnO nanoparticles (nano‐ZnO) were dispersed into acrylic polymer matrix at the various concentrations from 1 to 6% (by total weight of resin solids). The photocatalytic degradation of nanocomposite coating under ultraviolet (UV) light irradiation has been investigated by monitoring its weight loss and chemical/microstructural/morphological changes. As the topcoat layer, its heat reflectance recovery has been evaluated under UV/condensation exposure by using an artificial dirty mixture of 85 wt% nanoclay, 10 wt% silica particles (1–5 μm), 1 wt% carbon black, and 2 wt% engine oil. After 108‐cycle UV/condensation exposure, infrared spectra and weight loss analysis indicated that the maximal degradation for nanocomposite coating is observed at 1 wt% nano‐ZnO. On the other hand, after 96 hr of UV light exposure, the nanocomposite coating with1 wt% nano‐ZnO could restore effectively the reflective index of solar‐heat reflectance coating (from 58.45 to 80.78%). Finally, the photodegradation mechanism of this waterborne acrylic polymer coating has been proposed as the UV‐induced formation of CCCO conjugated double bonds. As a result, its self‐cleaning phenomenon can be achieved as the recovery of heat reflectance.
    Type of Medium: Online Resource
    ISSN: 0021-8995 , 1097-4628
    URL: Issue
    URL: Article
    DOI: 10.1002/app.v137.37
    DOI: 10.1002/app.49116
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1491105-X
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  • 9
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    Pure and cerium‐doped zinc oxides: Hydrothermal synthesis and photocatalytic degradation of methylene blue under visible light irradiation
    Wiley ; 2020
    In:  Journal of the Chinese Chemical Society Vol. 67, No. 9 ( 2020-09), p. 1631-1643
    Details
    In: Journal of the Chinese Chemical Society, Wiley, Vol. 67, No. 9 ( 2020-09), p. 1631-1643
    Abstract: Pristine and cerium‐doped zinc oxides with a different dopant concentration between 1 and 5% were fabricated using the hydrothermal method. Prepared materials show direct bandgaps of comparable values. Cerium‐doped materials show UV‐Vis spectra with broad tails toward the visible light range. Pure zinc oxide displays the flower‐like form, while cerium‐doped materials possess rod‐shaped morphologies. The materials were tested for the degradation performance of methylene blue under visible light irradiation. To elucidate the difference in their performance, further measurements and experiments were conducted. Overall, 3%‐cerium doped zinc oxide shows the greatest photocatalytic performance. This is possibly attributed to its rod shape with good uniformity and to the enrichment of oxygen vacancies in its surface layers. Finally, trapping experiments reveal that positive holes and hydroxyl radicals were the predominant active species during the photocatalytic degradation process.
    Type of Medium: Online Resource
    ISSN: 0009-4536 , 2192-6549
    URL: Issue
    URL: Article
    DOI: 10.1002/jccs.v67.9
    DOI: 10.1002/jccs.202000050
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2029538-8
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  • 10
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    Central composite design‐based response surface methodology for optimization of tetrodotoxin extraction from the horseshoe crab Carcinoscorpius rotundicauda
    Wiley ; 2023
    In:  Asia-Pacific Journal of Chemical Engineering
    Details
    In: Asia-Pacific Journal of Chemical Engineering, Wiley
    Abstract: Tetrodotoxin analogues (TTXs) used in research and development were originated from biological sources for the last decades. Among TTXs‐bearing aquatic animals, horseshoe crab Carcinoscorpius rotundicauda from Vietnam's Coast was reported to contain a high level of TTXs, indicating a promising source for extraction and purification of TTXs. In this work, horseshoe crab C. rotundicauda collected from Can Gio Coast, Vietnam was used for TTX extraction using homogenization‐assisted method with acetic acid solvent. The extraction process was analysed and optimized by single‐factor investigation and response surface methodology (RSM). Single‐factor investigation pointed out that the optimal conditions for TTX recovery yield from C. rotundicauda 's soft tissues were homogenization time of 20 min, acetic acid concentration of 1.0%, solvent/matrix ratio of 4 mL/g, extraction temperature of 70°C, extraction time of 30 min and number of extraction of two times. The most significant factors including acetic acid concentration, solvent/matrix ratio and extraction temperature were utilized for constructing the RSM model to predict TTX recovery yield. The maximal TTX recovery yield predicted from RSM model was 97.3% under solvent/matrix ratio of 4 mL/g, extraction temperature of 70°C and acetic acid concentration of 1% (v/v). The RSM model displayed a high stability and precision for prediction of TTX recovery yield from experiments of 1–10 kg C. rotundicauda 's soft tissues/batch extractions producing low errors (−1.95% to 1.85%). TTXs in C. rotundicauda 's soft tissues were elucidated by HPLC‐MS/MS, revealing the presence of three analogues TTX, 4epi‐TTX and Anh‐TTX with their contents of 43.02, 22.54 and 45.07 μg/g, respectively.
    Type of Medium: Online Resource
    ISSN: 1932-2135 , 1932-2143
    URL: Article
    DOI: 10.1002/apj.2974
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2276947-X
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