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Southeastern Turkey perished by the M w 7.8, Kahramanmaras earthquake on February 6, 2023, at 01:17 UT (04:17 LT). The Kahramanmaras-centered event, hit by the break of the East Anatolian Fault Line, is felt in Syria, Egypt, Lebanon, Iraq, and Cyprus on the border of Turkey. Together with Syria, it causes loss of lives and severe damage in 10 cities. This work is dedicated to the people of the region. The study discusses the causality of anomalies by conducting ionospheric anomaly research via the interpolated TEC map obtained from the CODE according to the coordinates of the epicenter of the earthquake (latitude, longitude). The TEC amplitudes are observed by evolving the time-domain TEC map into the frequency-domain with the Fourier transform. The peaks of the amplitudes allow preliminary information for the anomaly days. For the anomaly, the TEC (TECU) boundaries are drawn by the statistical specification. The TEC map outside these boundaries is marked as an anomaly. The causality of abnormalities is tried to be read through the triad of the geomagnetic storm(s) , solar activity , and the earthquake effect. One can find seven anomaly days in the paper. January 30, February 2, 3, 11, 15, 16, and 21 are the anomaly days. The essay probably detects the anomaly before 3 days related to the Southeastern earthquake. • Reads the causality of the earthquake in southeast Turkey (Mw 7.8), through the ionosphere-earth crust relationship. • Notices potential anomalies by presenting the time-domain TEC atlas in the frequency domain with Fourier spectral analysis. • Considering all possible TEC anomaly essentials detect the precursors of the earthquake 3 days before the event day. [ABSTRACT FROM AUTHOR]

Phytochemical investigation of the aerial parts of Digitalis grandiflora Miller (Plantaginaceae) led to the isolation of an undescribed cardenolide type glycoside digigrandifloroside (1) along with five known compounds, rengyoside A (2), rengyoside B (3), cleroindicin A (4), salidroside (5), and cornoside (6), from its aqueous fraction of methanolic extract. Structures of the isolated compounds were determined by means of spectroscopic techniques. 1–6 were isolated for the first time from D. grandiflora. 2 and 3 are being reported for the first time from Digitalis genus and Plantaginaceae family with this study. This is the second report for occurrence of 4 from a Digitalis species. Cytotoxic activity of the aqueous fraction was also tested against HEp-2 (Human larynx epidermoid carcinoma) and HepG2 (Human hepatocellular carcinoma) cancer cell lines and L929 (Mouse fibroblast cell) non-cancerous cell line. Aqueous fraction showed stronger cytotoxicity on HEp-2 cells than HepG2. Therefore, the cytotoxic activity of 1 , 2 , 4, and 6 were tested against HEp-2 and L929 cell lines. 3 and 5 couldn't be tested due to their insufficient amount. 1 showed the highest cytotoxicity against HEp-2 cells with IC 50 value 10.1 μM when compared with the positive control, etoposide and 2–6 (IC 50 of etoposide; 39.5 μM). Phytochemical investigation of the aerial parts of Digitalis grandiflora Miller (Plantaginaceae) led to the isolation of an undescribed cardenolide type glycoside digigrandifloroside along with five known compounds. Digigrandifloroside showed the highest cytotoxicity against HEp-2 cells with IC 50 value 10.1 μM. Unlabelled Image [ABSTRACT FROM AUTHOR]

The apolar organic extract obtained from aerial parts of Centaurea drabifolia Sibth. & Sm. subsp. detonsa (Bornm.) Wagenitz, growing wild in Turkey, was investigated for the first time for its secondary metabolite composition. Seven sesquiterpene lactones belonging to the guaiane class ( 1 – 7 ), including the new compound 4 , along with a fatty acid lactone derivative ( 8 ), were isolated. The structures of these compounds were established by spectroscopic analysis, including 2D NMR spectroscopic techniques, with the stereostructure of the new guaiane 4 determined with the help of MTPA derivatization. Cytotoxic activities of compounds 1 – 7 were evaluated against two cancer cell lines, namely acute lymphoblastic leukemia (CCRF-CEM) and its multidrug-resistant subline CEM/ADR5000. Results showed that aguerin B ( 1 ) and cynaropicrin ( 2 ) showed a potent activity on both cell lines revealing interesting details about the structure-activity relationships in the class of acylated guaiane sesquiterpenes. [ABSTRACT FROM AUTHOR]

• First study from Stratonikeia using chemometrics and a high number of samples. • Developed various multivariate models by FTIR spectroscopy for the discrimination. • Compared the discrimination capabilities of the models as statistically. • Investigated the mineralogical composition and the firing conditions by FTIR data. The use of attenuated total reflectance (ATR) Fourier transform infrared (FTIR) spectra combined with chemometrics were tested to assess the firing conditions of the shard samples excavated from the ancient city of Stratonikeia. Totally thirty-six principal component analysis (PCA) models were compared according to their ability to classify fifty-five shard samples. The PCA model using normal FTIR spectra ranged between 825 and 400 cm−1 with 25 smoothing points showed the best classification results by dividing the shard samples into five different groups (A, B, C, D, E) based on their different spectral information. To determine the firing conditions and the mineralogical compositions of the shard groups, the second-derivative ATR-FTIR spectra (two polynomial degrees and 11 smoothing points of Savitzky-Golay) between 1700 and 400 cm−1 was successfully used. It was determined that the minerals of pseudo-amorphous structure of meta-smectite, quartz, muscovite, gehlenite, and gypsum were the main phases in the shard samples fired in the oxidizing atmospheric conditions. The obtained findings indicate that the firing temperature is about 800–950 °C and 600–800 °C for the shard groups of A, B, C, and D and E, respectively. [ABSTRACT FROM AUTHOR]