Aizhan Essedova

Ms. Aizhan Essedova

orcid

Research Focus & Metrics

Academic Career Length

2Years (2025-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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29 March 2025 in Bulletin of the Karaganda University. “Biology, Medicine, Geography Series”
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Journal Article
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AEAizhan Essedova
Aizhan Essedova
VKVladimir Kazantsev
Vladimir Kazantsev
ZZZ. Zhumagazina
Z. Zhumagazina
МIМ. Islamkhan
М. Islamkhan
AMA. Mamayeva
A. Mamayeva
VKV. Kazantsev
V. Kazantsev
В статье представлены итоги изучения морфологического и анатомического строения надземных органов курильского чая мелколистого (Dasiphora parvifolia), собранного на территории Карагандинской области (Центральный Казахстан). Проанализированы показатели надземных органов и составлены описания ключевых морфологических и анатомических признаков, таких как: форма листа, структура верхней и нижней стороны листа, строение стебля, форма соцветия и цветка, его частей — чашечка, лепестки и чашелистники. Микроскопические показатели приведены для поверхностных препаратов и срезов. По итогам описаний в статье определены диагностические признаки сырья на макро- и микроскопическом уровне.

11 September 2026 in Pharmaceuticals
Verified
Journal Article
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AMAigul Medeshova
Aigul Medeshova
AEAizhan Essedova
Aizhan Essedova
MIMargarita Yulaevna Ishmuratova
Margarita Yulaevna Ishmuratova
OPOrazbayeva Perizat
Orazbayeva Perizat
PBPiotr Belniak
Piotr Belniak
SSSabira Sabyrova
Sabira Sabyrova
Background/Objectives: Dasiphora parvifolia, a little-studied Central Asian shrub, lacks standardized pharmacognostic data. This study aimed to comprehensively characterize its above-ground organs, establish diagnostic criteria, comparatively evaluate extraction methods, profile phytochemicals, and evaluate antimicrobial activity. Methods: Morphological, morphometric, and anatomical analyses were performed using light microscopy (ANOVA, p ≤ 0.05). Physicochemical parameters were determined gravimetrically. Percolation and ultrasonic-assisted extraction (UAE) were compared using varying ethanol concentrations, ratios, and maceration times. Phenolics were identified by HPLC-UV and confirmed by ESI-MS. Results: Diagnostic features included leaflet size (6.91 × 1.14 mm), stem length (17.39 cm), and flower diameter (6.92 mm). Microscopy revealed anomocytic stomata and multicellular trichomes (120 µm). Quality parameters (moisture 2.61%, total ash 5.55%, extractives 42.36%). UAE with 70% ethanol (1:20, 24 h pre-maceration) gave 7.53% total phenolics in the dry extract and 7.68% for percolation, corresponding to 20.81 and 28.72 mg/g of raw material, respectively. Among the analyzed extracts, the highest concentrations were detected for gallic acid (3.61%), chlorogenic acid (2.94%), cynaroside (2.28%), and hyperoside (1.82%). Total polyphenols, flavonoids, tannins, β-carotene, and α-tocopherol were 3.70%, 1.36%, 2.67%, 330.08 mg/kg, and 138.0 mg%, respectively. DPPE70 showed the highest activity against P. aeruginosa (17.0 mm), whereas DPUE70-24 showed the highest activity against S. aureus (22.0 mm). Conclusions: D. parvifolia can be considered a relevant source of phenolic compounds. The high levels of gallic and chlorogenic acids, together with hyperoside and cynaroside, indicate a substantial phenolic profile and may contribute to the antioxidant and antimicrobial activities of the extracts.

31 March 2026 in Actual Problems of the Present
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AMAigul Medeshova
Aigul Medeshova
OPOrazbayeva Perizat
Orazbayeva Perizat
AEAizhan Essedova
Aizhan Essedova
КККарлыгаш Кайырбекова
Карлыгаш Кайырбекова
Бұл мақалада фармацевтикалық білім беруде студенттерді жұмсақ дәрілік түр технологиясы бойынша оқытуда жасанды интеллект (ЖИ) элементтерін пайдалана отырып, инновациялық оқыту әдістерін енгізу қарастырылады. Онда ЖИ-ді оқу процесіне интеграциялаудың заманауи тәсілдері, соның ішінде виртуалды зертханалар, болжамдық модельдер және процесс параметрлерін талдау және дәрілік заттардың сапасын болжау үшін машиналық оқыту алгоритмдері қарастырылады. Қабынуға қарсы жақпа майын әзірлеу және оңтайландыру бойынша зертханалық сабақты мысал ретінде пайдалана отырып, студенттердің ЖИ-ді модельді гомогенизациялауға, температураны бақылауға, араластыру уақытына және салқындату жылдамдығына қалай қолданатыны көрсетілген. Мақалада маңызды процесс параметрлері (МПП) мен маңызды сапа атрибуттары (ССА) арасындағы байланыс, сондай-ақ оқу процесінің дәлдігі мен тиімділігін арттыра алатын ЖИ құралдары егжей-тегжейлі сипатталған. Онда студенттердің кәсіби, зерттеу және цифрлық құзыреттіліктерін дамыту үшін осындай әдістерді қолданудың маңыздылығы атап өтілген, осылайша олардың аналитикалық қабілеттерін, шешім қабылдау дағдыларын және цифрлық сауаттылығын арттырады. Авторлар ЖИ-ді оқу процесіне интеграциялау зертханалық тәжірибелердегі қателіктерді азайтатынын, теориялық материалды алу сапасын жақсартатынын және оқу процесін фармацевтикалық өндірістің нақты жағдайларына жақындататынын көрсетеді. Бұл нәтижелер инновациялық технологияларды мамандарды даярлауға енгізудің тиімділігін көрсетеді және болашақ фармацевттердің құзыреттілігін арттыру құралы ретінде жасанды интеллектті пайдаланудың өзектілігін растайды.

29 October 2026 in Pharmaceuticals
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Journal Article
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AMAigul Medeshova
Aigul Medeshova
OPOrazbayeva Perizat
Orazbayeva Perizat
AEAizhan Essedova
Aizhan Essedova
ADAkniet Dosai
Akniet Dosai
MAMeruyert Amantayeva
Meruyert Amantayeva
RARaiymbekova Zhanel Altynbekkyzy
Raiymbekova Zhanel Altynbekkyzy
Background/Objectives: Inula helenium L. (Asteraceae) is widely used in traditional medicine, and its essential oil has demonstrated antimicrobial properties. The aim of this study was a comprehensive investigation of the chemical composition and biological activity of a concentrated extract of Inula helenium L. roots, including the determination of the main groups of biologically active substances and the assessment of antioxidant, antimicrobial, anti-aggregatory and anticoagulant properties. Methods: Inula helenium L. roots were extracted by UAE, the optimal conditions were double extraction with 70% ethanol at 30 kHz for 30 min. Chemical profiling was performed by HPLC-ESI-MS against 20 reference phenolic compounds, with method validation. Antimicrobial activity was assessed by microdilution against Gram-positive, Gram-negative and fungal strains (MBC/MFC). Antioxidant activity was evaluated in two chemiluminescence model systems simulating reactive oxygen species generation and lipid peroxidation. Anti-aggregatory and anticoagulant effects were studied in vitro on platelet-rich and platelet-poor plasma. Results: 11 polyphenolic compounds were identified and quantified, including five phenolic acids (gallic, chlorogenic, caffeic, ferulic and p-coumaric acids) and six flavonoids (hyperoside, naringenin, quercetin, kaempferol, luteolin and apigenin). The extract exhibited antimicrobial activity with MBC values of 3.91–62.5 μg/mL against Gram-positive bacteria, 2.5–10 μg/mL against Gram-negative bacteria, and 10 μg/mL against Candida albicans. The extract moderately inhibited platelet aggregation, prolonged aPTT, and reduced chemiluminescence by 15–20% relative to the control. Conclusions: The thick extract of Inula helenium L. roots contains bioactive phenolic compounds and exhibits moderate antimicrobial, antioxidant and anticoagulant activity, supporting its potential as a natural multifunctional agent and justifying further in vivo studies and dosage form development.

6 November 2026 in Molecules
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Journal Article
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AMAigul Medeshova
Aigul Medeshova
OPOrazbayeva Perizat
Orazbayeva Perizat
AEAizhan Essedova
Aizhan Essedova
MAMeruyert Amantayeva
Meruyert Amantayeva
YTYerbolat Tulebayev
Yerbolat Tulebayev
BOBekzhan Orazbayev
Bekzhan Orazbayev
This study investigated manufacturing conditions for suppositories containing a CO2 extract of Rosmarinus officinalis L. herb, using a previously developed formulation, and evaluated a gas chromatography procedure with flame ionization detection (GC–FID) for quantitative marker determination. The effects of key manufacturing parameters were evaluated, and the optimal conditions for base preparation were determined as 70 °C and 120 rpm for 12 min; increasing the agitation speed to 150 rpm did not reduce the processing time. Extract concentrate preparation at 37 °C and 60 rpm required 25 min to achieve visually assessed homogeneity. At 60 rpm, prior concentrate preparation reduced the subsequent mixing time of the suppository mass from 100 to 20 min at each investigated temperature (37, 45, and 60 °C), excluding the time required to prepare the concentrate. Cooling at 8 °C for 60 min was selected on the basis of mechanical-strength measurements. Agar diffusion experiments provided a comparative assessment of the diffusion of colored extract constituents rather than a quantitative measure of chamazulene release or bioavailability. The findings identify candidate manufacturing conditions for further evaluation. Confirmation of marker identity, analytical validity, quantitative content uniformity, and long-term stability is required before reliable product standardization can be established.