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12 Newest Publications about the topic spectrophotometers

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Study of the influence of substrate and spectrophotometer characteristics on the in vitro measurement of sunscreens efficiency

03-Jun-2018 | Author(s): C. Couteau, A. Philippe, M.-A. Vibet, E. Paparis, L. Coiffard, European Journal of Pharmaceutical Science, 2018

Publication date: 30 August 2018 Source:European Journal of Pharmaceutical Sciences, Volume 121 Author(s): C. Couteau, A. Philippe, M.-A. Vibet, E. Paparis, L. Coiffard All the methods used for the in vitro measurement of the SPF, the universal indicator of sunscreens efficiency, ...

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Physiological processes associated with salinity tolerance in an alfalfa half‐sib family

21-Jun-2017 | M. Rokebul Anower, M. D. Peel, I. W. Mott, Y. Wu, Journal of Agronomy and Crop Science, 2017

Abstract We previously reported an alfalfa half‐sib family, HS‐B, with improved salt tolerance, compared to parental plants, P‐B. In this study, we conducted additional experiments to address potential physiological mechanisms that may contribute to salt tolerance in HS‐B. Vegetatively ...

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Diffuse Reflectance Spectroscopy Versus Mexameter® MX18 Measurements of Melanin and Erythema in an African Population

08-Jun-2016 | Caradee Y Wright, Aletta E Karsten, Marcus Wilkes, Ann Singh, Johan du Plessis, Patricia N Albers, Petrus A Karsten, Photochemistry and Photobiology, 2016

Abstract Melanin provides protection against excess exposure to solar ultraviolet radiation (UVR) and related adverse health effects. Diffuse Reflectance Spectroscopy (DRS) can be used to calculate cutaneous melanin and erythema, but this is complex and has been mostly used for light‐to‐medium ...

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Antimicrobial effect of 4‐hydroxybenzoic acid ester with glycerol

25-May-2015 | M. Kosová, I. Hrádková, V. Mátlová, D. Kadlec, J. Šmidrkal, V. Filip, Journal of Clinical Pharmacy and Therapeutics, 2015

Summary What is known and objectives Parabens have been commonly used as preservatives in pharmaceutical and cosmetics industries for almost 50years. These compounds are thermostable, pH‐stable and inexpensive and have a wide antimicrobial effect. The antimicrobial activity of parabens in ...

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Rapid spectrophotometric technique for quantifying iron in cells labeled with superparamagnetic iron oxide nanoparticles: potential translation to the clinic

29-Oct-2012 | Esmaeel R. Dadashzadeh, Matthew Hobson, L. Henry Bryant, Dana D. Dean, Joseph A. Frank, Contrast Media & Molecular Imaging, 2012

Labeling cells with superparamagnetic iron oxide (SPIO) nanoparticles provides the ability to track cells by magnetic resonance imaging. Quantifying intracellular iron concentration in SPIO labeled cells would allow for the comparison of agents and techniques used to magnetically label cells. ...

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Aerobic biodegradation of Azo dye by Bacillus cohnii MTCC 3616; an obligately alkaliphilic bacterium and toxicity evaluation of metabolites by different bioassay systems

15-Oct-2012 | A. S. Arun Prasad, K. V. Bhaskara Rao, Applied Microbiology and Biotechnology, 2012

An obligate alkaliphilic bacterium Bacillus cohnii MTCC 3616 aerobically decolorized a textile azo dye Direct Red-22 (5,000 mg l−1) with 95 % efficiency at 37 °C and pH 9 in 4 h under static conditions. The decolorization of Direct Red-22 (DR-22) was possible through a broad pH (7–11), ...

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Investigation of Effects of Terpene Skin Penetration Enhancers on Stability and Biological Activity of Lysozyme

30-Aug-2012 | Rahul M. Varman, Somnath Singh, AAPS PharmSciTech, 2012

The transport of proteins through skin can be facilitated potentially by using terpenes as chemical enhancers. However, we do not know about the effects of these enhancers on the stability and biological activity of proteins which is crucial for the development of safe and efficient formulations. ...

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Folate‐conjugated thermo‐responsive micelles for tumor targeting

24-Jul-2012 | Jian Zhang, Dawei Deng, Hongyan Zhu, Youngro Byun, Victor C. Yang, Yueqing Gu, Journal of Biomedical Materials Research Part A, 2012

Abstract Folate‐conjugated and thermo‐responsive poly((N‐isopropylacrylamide)‐co‐ acrylamide‐co‐(octadecyl acrylate)‐co‐(folate‐(polyethylene glycol)‐(acrylic acid))) (P(NIPA‐co‐AAm‐co‐ODA‐co‐FPA)) micelles with mean diameter of about 60 nm and lower critical solution temperature (LCST) of ...

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Antioxidative activities and the chemical constituents of two Chinese teas, Camellia kucha and C. ptilophylla

01-May-2012 | Li, Kaikai; Shi, Xianggang; Yang, Xiaorong; Wang, Yuanyuan; Ye, Chuangxing; Yang, Zhongyi, International Journal of Food Science & Technology, 2012

Summary Two kinds of green tea were prepared with the young shoots of Camellia kucha and C.ptilophylla, and antioxidative activities of the chemical constituents were determined. Levels of alkaloids, catechins, total polyphenols, flavonoids and amino acids were determined by high‐performance ...

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Enhanced Biodecolorization of Reactive Dyes by Basidiomycetes Under Static Conditions

22-Mar-2012 | Ismat Bibi, Haq Nawaz Bhatti, Applied Biochemistry and Biotechnology, 2012

This study presents the biodecolorization potential of basidiomycete fungi Trametes hirsuta, Pycnoporus sp., and Irpex sp. for different reactive dyes viz. Reactive Red 120, Remazol Brilliant Blue R (RBBR), Reactive Orange G, and Reactive Orange 16 under static and shaking conditions. The ...

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