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  • 1
    Online Resource
    Online Resource
    Different fermentation strategies by Schizochytrium mangrovei strain pq6 to produce feedstock for exploitation of squalene and omega‐3 fatty acids
    Wiley ; 2018
    In:  Journal of Phycology Vol. 54, No. 4 ( 2018-08), p. 550-556
    Details
    In: Journal of Phycology, Wiley, Vol. 54, No. 4 ( 2018-08), p. 550-556
    Abstract: Schizochytrium mangrovei strain PQ 6 was investigated for coproduction of docosahexaenoic acid (C22: 6ω‐3, DHA ) and squalene using a 30‐L bioreactor with a working volume of 15 L under various batch and fed‐batch fermentation process regimes. The fed‐batch process was a more efficient cultivation strategy for achieving higher biomass production rich in DHA and squalene. The final biomass, total lipid, unsaponifiable lipid content, and DHA productivity were 105.25 g · L −1 , 43.40% of dry cell weight, 8.58% total lipid, and 61.66 mg · g −1  · L −1 , respectively, after a 96 h fed‐batch fermentation. The squalene content was highest at 48 h after feeding glucose (98.07 mg · g −1 of lipid). Differences in lipid accumulation during fermentation were correlated with changes in ultrastructure using transmission electron microscopy and Nile Red staining of cells. The results may be of relevance to industrial‐scale coproduction of DHA and squalene in heterotrophic marine microalgae such as Schizochytrium .
    Type of Medium: Online Resource
    ISSN: 0022-3646 , 1529-8817
    URL: Issue
    URL: Article
    DOI: 10.1111/jpy.2018.54.issue-4
    DOI: 10.1111/jpy.12757
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 281226-5
    detail.hit.zdb_id: 1478748-9
    SSG: 12
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  • 2
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    HIV point of care diagnosis: preventing misdiagnosis experience from a pilot of rapid test algorithm implementation in selected communes in Vietnam
    Wiley ; 2017
    In:  Journal of the International AIDS Society Vol. 20, No. S6 ( 2017-08)
    Details
    In: Journal of the International AIDS Society, Wiley, Vol. 20, No. S6 ( 2017-08)
    Abstract: Introduction : In Vietnam, HIV testing services had been available only at provincial and district health facilities, but not at the primary health facilities. Consequently, access to HIV testing services had been limited especially in rural areas. In 2012, Vietnam piloted decentralization and integration of HIV services at commune health stations (CHSs). As a part of this pilot, a three‐rapid test algorithm was introduced at CHSs. The objective of this study was to assess the performance of a three‐rapid test algorithm and the implementation of quality assurance measures to prevent misdiagnosis, at primary health facilities. Methods : The three‐rapid test algorithm (Determine HIV‐1/2, followed by ACON HIV 1/2 and DoubleCheckGold HIV 1 & 2 in parallel) was piloted at CHSs from August 2012 to December 2013. Commune health staff were trained to perform HIV testing. Specimens from CHSs were sent to the provincial confirmatory laboratory (PCL) for confirmatory and validation testing. Quality assurance measures were undertaken including training, competency assessment, field technical assistance, supervision and monitoring and external quality assessment (EQA). Data on HIV testing were collected from the testing logbooks at commune and provincial facilities. Descriptive analysis was conducted. Sensitivity and specificity of the rapid testing algorithm were calculated. Results : A total of 1,373 people received HIV testing and counselling (HTC) at CHSs. Eighty people were diagnosed with HIV infection (5.8%). The 755/1244 specimens reported as HIV negative at the CHS were sent to PCL and confirmed as negative, and all 80 specimens reported as HIV positive at CHS were confirmed as positive at the PCL. Forty‐nine specimens that were reactive with Determine but negative with ACON and DoubleCheckGold at the CHSs were confirmed negative at the PCL. The results show this rapid test algorithm to be 100% sensitive and 100% specific. Of 21 CHSs that received two rounds of EQA panels, 20 CHSs submitted accurate results. Conclusions : Decentralization of HIV confirmatory testing to CHS is feasible in Vietnam. The results obtained from this pilot provided strong evidence of the feasibility of HIV testing at primary health facilities. Quality assurance measures including training, competency assessment, regular monitoring and supervision and an EQA scheme are essential for prevention of misdiagnosis.
    Type of Medium: Online Resource
    ISSN: 1758-2652 , 1758-2652
    URL: Article
    DOI: 10.7448/IAS.20.7.21752
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2467110-1
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  • 3
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    Development and assessment of a community‐based screening tool for mental health disorders among people who inject drugs
    Wiley ; 2022
    In:  Drug and Alcohol Review Vol. 41, No. 3 ( 2022-03), p. 697-705
    Details
    In: Drug and Alcohol Review, Wiley, Vol. 41, No. 3 ( 2022-03), p. 697-705
    Abstract: The prevalence of mental health disorders among people who use drugs is high and well documented. This hard‐to‐reach population faces a very low awareness and access to mental health care, especially in developing countries. The objectives of this study were to design and assess a quick screening tool (QST) that community‐based organisations (CBO) could routinely apply to a Vietnamese population of people who inject drugs (PWID), in order to refer them appropriately to mental health specialists. Methods We devised a tool that included nine questions covering anxiety, depression, suicide risk and psychotic symptomatology. Its use required no specific background and 2 h training. Specificity and sensitivity of the QST were assessed in a population of 418 PWID recruited via respondent driven sampling, using the Mini International Neuropsychiatric Interview questionnaire plus clinical evaluation as a reference standard. Acceptability was assessed using a self‐administered anonymous questionnaire submitted to all CBO members who used the QST. Results CBO members considered the QST easy to use, relevant and helpful to deal with mental health issues. Area under the curve for detection of any symptom using the QST was 0.770. The maximum sensitivity and specificity were reached with a cut‐off of 2 [sensitivity was 71.1% (95% confidence interval 62.4, 78.8), specificity was 75.9% (70.5, 80.7)]. Discussion and Conclusions The QST appeared to be both efficient and well accepted. Given the burden of mental health problems among hard‐to‐reach PWID in developing countries, community‐based screenings such as this one could be a particularly appropriate response.
    Type of Medium: Online Resource
    ISSN: 0959-5236 , 1465-3362
    URL: Issue
    URL: Article
    DOI: 10.1111/dar.v41.3
    DOI: 10.1111/dar.13402
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1476371-0
    SSG: 15,3
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  • 4
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    STUDY ON BIOLOGICAL CHARACTERISTICS OF HETEROTROPHIC MARINE MICROALGA-SCHIZOCHYTRIUM MANGROVEI PQ6 ISOLATED FROM PHU QUOC ISLAND, KIEN GIANG PROVINCE, VIETNAM1 : HETEROTROPHIC MARINE MICROALGA
    Wiley ; 2011
    In:  Journal of Phycology Vol. 47, No. 4 ( 2011-08), p. 944-954
    Details
    In: Journal of Phycology, Wiley, Vol. 47, No. 4 ( 2011-08), p. 944-954
    Type of Medium: Online Resource
    ISSN: 0022-3646
    URL: Issue
    URL: Article
    DOI: 10.1111/jpy.2011.47.issue-4
    DOI: 10.1111/j.1529-8817.2011.01012.x
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 281226-5
    detail.hit.zdb_id: 1478748-9
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  • 5
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    The seasonality of gold prices in China does the risk‐aversion level matter?
    Wiley ; 2020
    In:  Accounting & Finance Vol. 60, No. 3 ( 2020-09), p. 2617-2664
    Details
    In: Accounting & Finance, Wiley, Vol. 60, No. 3 ( 2020-09), p. 2617-2664
    Abstract: This article aims to investigate the seasonality of gold prices at the Shanghai Gold Exchange over the 2002–2016 period. Our contributions rely in the distinction between risk‐averse and risk‐seeking investors regarding their investment strategies. The results show the existence of positive Monday and January effects. However, the Monday effect is more suitable to risk‐seeking investors while the January effect is more suitable to risk‐averse investors in bearish periods only. A robustness check shows that the Monday effect does not hold on gold futures prices. These results indicate the importance to consider the risk‐aversion level of investors in seasonal investment strategies.
    Type of Medium: Online Resource
    ISSN: 0810-5391 , 1467-629X
    URL: Issue
    URL: Article
    DOI: 10.1111/acfi.v60.3
    DOI: 10.1111/acfi.12396
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1482438-3
    SSG: 3,2
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  • 6
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    Does it pay to be green? A disaggregated analysis of U.S. firms with green patents
    Wiley ; 2020
    In:  Business Strategy and the Environment Vol. 29, No. 3 ( 2020-03), p. 1331-1361
    Details
    In: Business Strategy and the Environment, Wiley, Vol. 29, No. 3 ( 2020-03), p. 1331-1361
    Abstract: The objective of this paper is to investigate the relationship between environmental performance and financial performance on a sample of 361 U.S. firms over the 2007–2016 period. We contribute to the literature by considering firms active in sustainable innovations by obtaining green patents. We also contribute to the literature by using disaggregated measures of environmental performance collected from the Bloomberg ESG database, including environmental disclosure score, greenhouse gas emissions, waste emissions and water use. Panel data regressions' results show that environmental transparency positively influences current accounting and stock market performance, but negatively influences the return on capital employed. Furthermore, lower pollution emissions tend to improve the current return on assets, while being harmful for the efficiency of long‐term capital employment at the same time. The empirical results also indicate that the Global Financial Crisis (2007–2010) increased the environmental transparency of firms with green patents but negatively impacted their price to earnings ratio. At the same time, lower waste disposal diminishes stock valuation while the opposite is true with water use. Taken together, our results suggest that environmental transparency and greenhouse gas emissions generally appear to be the most important environmental variables influencing financial performance, with increasing importance attributed to them by the market after the global crisis period.
    Type of Medium: Online Resource
    ISSN: 0964-4733 , 1099-0836
    URL: Issue
    URL: Article
    DOI: 10.1002/bse.v29.3
    DOI: 10.1002/bse.2437
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2025936-0
    detail.hit.zdb_id: 1127954-0
    SSG: 3,2
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  • 7
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    Price formation on clandestine markets: the case of the Paris gold market during the Second World War
    Wiley ; 2019
    In:  The Economic History Review Vol. 72, No. 3 ( 2019-08), p. 1048-1072
    Details
    In: The Economic History Review, Wiley, Vol. 72, No. 3 ( 2019-08), p. 1048-1072
    Abstract: Because of the scarcity of data, there are few quantitative analyses dealing with clandestine markets, despite their prime importance during wartime. This article exploits a unique database of daily prices of gold coins traded in occupied Paris in order to gain insights into the price formation on such a market. First, using data from Switzerland, we show that arbitrage took place, despite the costs and risks involved, and led to a gradual (but incomplete) convergence of gold prices. Furthermore, a study of price seasonality reveals that less strict borders controls during the weekends made the volatility of returns higher at the start of the following week. Second, on the basis of an event study, we provide evidence that laws related to black markets did not have a significant impact on the gold price, except for the most severe law passed on 8 June 1943 which greatly increased the sentences for involvement. Finally, we assess whether the so‐called coin premiums existed on this clandestine market, and show that the large price variations for one gram of fine gold contained in different coins were due to market participants’ preferences for specific gold coins.
    Type of Medium: Online Resource
    ISSN: 0013-0117 , 1468-0289
    URL: Issue
    URL: Article
    DOI: 10.1111/ehr.2019.72.issue-3
    DOI: 10.1111/ehr.12737
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2011676-7
    detail.hit.zdb_id: 1801-6
    SSG: 7,25
    SSG: 19,2
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  • 8
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    Nutritional analysis of Vietnamese seaweeds for food and medicine
    Wiley ; 2004
    In:  BioFactors Vol. 22, No. 1-4 ( 2004-01), p. 323-325
    Details
    In: BioFactors, Wiley, Vol. 22, No. 1-4 ( 2004-01), p. 323-325
    Abstract: Vietnamese edible marine macro‐algae (seaweed) are of interest because of their value in nutrition and medicine. Vietnamese living in the coastal have traditionally utilized seaweeds species as food supplement and herbal medicine. They consumed seaweed as food in various forms: raw as salad and vegetable, pickle with sauce or with vinegar, relish or sweetened jellies and also cooked for vegetable soup. As herbal medicine, seaweed is usually used for traditional comestics, treatments for cough, asthma, hemorrhoid, boils, goitres, stomach ailments, urinary diseases, reduce the incidence of tumors, ulcers and headaches. Although Vietnam has an abundance of algae floral with total number of species is estimated to be nearly 1000 spp. in which there are 638 species of marine algae identified. However, there have been no intense study regarding to changes in marine algal chemistry. The fifteen species of edible seaweeds studied in this paper include green, brown and red algae. The proximate compositions as ash, protein, lipid, carbohydrate, fatty acids, vitamines, pigments, macro and micro‐elements were compared among different species examined and the genetic relationships among them by analyzing the species‐specific differences in nucleotide sequences of ITS‐1 region of the ribosomal DNA was identified.
    Type of Medium: Online Resource
    ISSN: 0951-6433 , 1872-8081
    URL: Issue
    URL: Article
    DOI: 10.1002/biof.v22:1/4
    DOI: 10.1002/biof.5520220164
    Language: English
    Publisher: Wiley
    Publication Date: 2004
    detail.hit.zdb_id: 2011592-1
    SSG: 12
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  • 9
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    Quasi‐3D‐Structured Surface‐Enhanced Raman Scattering Substrates Based on Silver Nanoparticles/Mesoporous Silicon Hybrid
    Wiley ; 2022
    In:  physica status solidi (a) Vol. 219, No. 18 ( 2022-09)
    Details
    In: physica status solidi (a), Wiley, Vol. 219, No. 18 ( 2022-09)
    Abstract: The surface‐enhanced Raman scattering (SERS) is a powerful spectroscopic technique for ultrasensitive and selective biochemical detection due to its capability of providing the “fingerprint” of information of molecular structures at low concentrations. Herein, mesoporous silicon (MPSi)‐based nanocomposites containing silver nanoparticles (AgNPs) provide novel efficient substrates for the detection of molecules. The quasi‐3D‐structured SERS substrate is formed by introducing Ag into the MPSi hollow column‐shaped nanostructure. This SERS substrate uniquely combines the ability of metal surfaces to amplify Raman scattering signals with an enlarged surface area and the increasing light–matter interaction duration that generates large SERS signals for the detection of chemicals. The proposed SERS substrate is verified by detecting orange methylene in solutions at ultralow concentration in the range of 10 −11 –10 −6   m with a linear‐dependent coefficient of R 2  = 0.99922 and the SERS enhancement factor is achieved up to 10 10 . Moreover, the proposed platform can detect diphenylamine with ultralow concentration of 10 −10  m and reliable reproducibility with an average relative stand deviation of 6.3%. The ability for MPSi substrate to detect target molecules at low concentrations helps pave a way to develop the detection tool for integrated, on‐chip devices.
    Type of Medium: Online Resource
    ISSN: 1862-6300 , 1862-6319
    URL: Issue
    URL: Article
    DOI: 10.1002/pssa.v219.18
    DOI: 10.1002/pssa.202200128
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1481091-8
    detail.hit.zdb_id: 208850-2
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  • 10
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    Research on optimization of spray drying conditions, characteristics of anthocyanins extracted from Hibiscus sabdariffa L. flower, and application to marshmallows
    Wiley ; 2024
    In:  Food Science & Nutrition
    Details
    In: Food Science & Nutrition, Wiley
    Abstract: Anthocyanin, a main‐colored bioactive compound found in Hibiscus sabdariffa L., is well‐known for a varied range of applications as food additives in foodstuff, and natural colorants in food, pharmaceutical, and printing industries. The study aimed to find out the suitable conditions for the spray‐drying process to obtain anthocyanin powder from the extract as well as characterized the powder. In addition, the obtained powder was applied to marshmallows and determined the acceptability of appearance, quality, and scavenging capacity of the candy. The carrier of maltodextrin and gum arabic was selected for spray‐drying, which had optimal conditions at 144°C and 7 mL/min, resulting in 100.22 mg/g anthocyanin content with an encapsulation efficiency of 93.87%. The obtained anthocyanin has appropriate moisture of 5.14%, quite appropriate bulk density, and tapped density, it also was high solubility, and poor flowability but easy compression. The shape of the particle by SEM analysis was low particle size (2–10 μm), wrinkled, unequal spherical size, rough surfaces with indentations, and slight cracks. The X‐ray diffraction (XRD) spectrum of the sample had very low crystallinity and diffuse wide peaks revealing that anthocyanin still exists inside maltodextrin particles. The FT‐IR spectrum had oscillations of characteristic groups of anthocyanin structure. Marshmallow samples added 5% anthocyanin powder gained high acceptability of appearance and maintained the scavenging capacity (DPPH) with an IC50 value of 7368.31 ppm after a month of storage.
    Type of Medium: Online Resource
    ISSN: 2048-7177 , 2048-7177
    URL: Article
    DOI: 10.1002/fsn3.3898
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 2703010-6
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