Dina A. Selim's research while affiliated with Alexandria University and other places
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Publications (8)
Many of the plants of genus Salsola are edible halophytes which are known for their use in treatment of inflammation as well as their nutritional content. This study aims at comprehensive chemical profiling of two Salsola species that are widely distributed in arid areas; S. imbricata and S. jordanicola, using UHPLC-QqQ-MS in an attempt to decipher...
Trigonella plants are semiarid crops grown all over the planet where their seeds and leaves are commonly utilized in cosmetic, medical and therapeutic purposes. Despite substantial research on the seeds, comprehensive study of Trigonella leaves extracts has not been documented. In this work, chemical profiling of T. foenum-graecum, T. maritima, T....
In the current study, seven Sri Lankan tea grades; Orange Pekoe, Flowery Pekoe, Broken Orange Pekoe Fannings, Broken Orange Pekoe black tea, green tea, silver tips and golden tips white tea grades were subjected to comprehensive metabolic profiling using UPLC-MS/MS combined with chemometrics. Theasensinin C and E, theaflavin and theacitrin were the...
The presented work discusses the development of a rapid and precise analytical protocol using near infrared spectroscopy combined with multivariate data analysis to authenticate, detect and quantify most of the commonly encountered plant adulterants used in fraud of saffron stigmas including safflower, pomegranate fruit peel, calendula flower, papr...
Near Infrared (NIR) method combined with chemometrics was utilized to achieve the target of deeper insight into the chemical diversity and to discriminate the different species and chemovarieties of Citrus peels. Unsupervised principal component analysis (PCA) and hierarchical cluster analysis (HCA) were used for comparing of samples. A clear separ...
Parallel to the growing global interest in alternative medical therapies, high measures of counterfeit pharmaceuticals enter the global market and, therefore, detection of such marketed products is essential. This article throws an illuminating spot on the adulteration of Cinnamomum verum (Cinnamomum zeylanicum) with Cinnamomum cassia and exhaustiv...
The evaluation of extraction protocols for untargeted and targeted metabolomics was implemented for root and aerial organs of Astragalus spinosus in this work. The efficiency and complementarity of commonly used extraction solvents, namely petroleum ether, methylene chloride, ethyl acetate and n-butanol were considered for method evaluation using c...
Citations
... Each tea type has its own distinct and important manuacturing method, such as withering or white tea, xation or green tea and ermentation or black tea. As a result, processing plays a vital role in the development o each tea types main characteristics and properties (Gu et al., 2022;Selim, Shawky, & Abu El-Khair, 2022). ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/539207162490881-1505568413761_Q64/Eman-Shawky.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/538539592433664-1505409252508_Q64/Rasha-Abu-El-Khair.jpg)
... Adulteration can be found to both branded and generic products and may include products with the correct ingredients or with the wrong ingredients, without active ingredients, with insufficient active ingredient or with fake packaging. [27,28] In a strictly manner speaking, an adulterant is a pharmacologically active substances with properties similar to the drug itself, which are added to offset the potency lost in dilution. A report from the International Pharmaceutical Students' Federation [29] has indicated that from the great number of drugs there are some more counterfeited than others, such as those high-consumption, expensive and innovative ones. ...
... In which NIR allows for preliminary food monitoring of various food types and provides both qualitative and quantitative data on complex samples. A current investigation on the detection of adulterants in saffron samples, conducted by Shawky et al. [29], is also provided. In order to improve the quality of the saffron, NIR spectroscopy and various chemometric techniques have been utilised to identify various plant adulterants. ...
... The tea samples were affected by external conditions during the NIR spectrum collection process, including sample state, particle size, baseline change, sample compactness difference, measurement environment difference, etc., which could cause various noises and information errors [26]. Therefore, before the multivariate statistical analysis took place, the spectral data needed to be preprocessed to reduce system noise and enhance the spectral features [27]. ...
... This blood-thinning compound can pose serious risks to human health due to its hepatotoxic effect. For that reason, the European health agencies have established restrictions on the tolerable daily intake of coumarin (TDI = 0.1 mg kg − 1 ) and consequently in the consumption of cassia cinnamon (Shawky & Selim, 2018). Bearing in mind its high added value and cost, Ceylon cinnamon has been highly prone to adulteration with the lower quality and less expensive cassia cinnamon causing potential risks to consumer health. ...
... The chemical compositions of species from the Astragalus genus appear to be very consistent, and more than 200 compounds have been discovered from several Astragalus species, including terpenoids, flavonoids, and polysaccharides, which are the main biologically active constituents of Astragalus. These plants also contain amino acids, alkaloids, β-sitosterol, metallic elements and anthraquinones, among others (Ibrahim et al., 2013;Shawky and Selim, 2017). Nonetheless, previous publications listed polysaccharides and particularly triterpene saponins as the specialised metabolites implicated in the bioactivity of crude Astragalus extracts (Yang et al., 2013;Li et al., 2014). ...
