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Objective: Considering the growing interest of researchers in a wide range of pharmacological effects characteristic of quince raw materials due to the presence of various groups of biologically active substances (BAS). The object of the study was fruits Cydonia oblonga Mill obtained in the Botanical Garden of Sechenov University, the Botanical Garden of Moscow State University, the Moscow and Krasnodar regions, harvested during the fruiting phase. Materials and methods: The analysis was performed on a GILSON high-performance liquid chromatograph, model 305 (France). Detection was carried out using a GILSON UV/VIS model 151 UV detector at a wavelength of 370 nm. The total content of polyphenols in the studied raw materials was estimated by Folin-Chicalteu spectrophotometry, the quantitative content of hydroxycinnamic acids in quince fruits was determined by spectrophotometry in terms of caffeic acid Results and discussions: The authors studied the composition of polyphenolic compounds and carried out their quantitative assessment, using HPLC analysis, the presence of polyphenolic substances represented by caffeic, gallic, chlorogenic, neochlorogenic, cinnamic acids, as well as catechin, quercetin, floretin and apigenin was established. A quantitative assessment of the total content of polyphenolic substances in fruits was carried out using the Folin-Chicalteu method, during which it was revealed that the content of the polyphenolic complex ranges from 8,775 to 9,221 in fresh raw materials and from 6,799 to 7,676 in dried raw materials. Losses of phenolic compounds during drying range from 16.8 to 22.5%. The total content of hydroxycinnamic acids in terms of caffeic acid was carried out by spectrophotometric analysis. The results obtained showed the content of analyzed substances in the determined raw materials from 2,021 to 2,344 in dried raw materials and from 3,126 to 3,526 in fresh. Conclusion: The analysis makes it possible to identify phenolic derivatives in extracts from quince fruits, which simplifies the standardization of raw materials in the preparation of appropriate regulatory documentation

Quince Duncan is a comprehensive study of the published short stories and novels of Costa Rica’s first novelist of African descent and one of the nation’s most esteemed contemporary writers.   The grandson of Jamaican and Barbadian immigrants to Limón, Quince Duncan (b. 1940) incorporates personal memories into stories about first generation Afro–West Indian immigrants and their descendants in Costa Rica. Duncan’s novels, short stories, recompilations of oral literature, and essays intimately convey the challenges of Afro–West Indian contract laborers and the struggles of their descendants to be recognized as citizens of the nation they helped bring into modernity.   Through his storytelling, Duncan has become an important literary and cultural presence in a country that forged its national identity around the leyenda blanca (white legend) of a rural democracy established by a homogeneous group of white, Catholic, and Spanish peasants. By presenting legends and stories of Limón Province as well as discussing the complex issues of identity, citizenship, belonging, and cultural exile, Duncan has written the story of West Indian migration into the official literary discourse of Costa Rica. His novels Hombres curtidos (1970) and Los cuatro espejos (1973) in particular portray the Afro–West Indian community in Limón and the cultural intolerance encountered by those of African-Caribbean descent who migrated to San José. Because his work follows the historical trajectory from the first West Indian laborers to the contemporary concerns of Afro–Costa Rican people, Duncan is as much a cultural critic and sociologist as he is a novelist.   In Quince Duncan , Dorothy E. Mosby combines biographical information on Duncan with geographic and cultural context for the analysis of his works, along with plot summaries and thematic discussions particularly helpful to readers new to Duncan.

The goal of this work was to evaluate the chemical constitution and health-promoting potential of 12 varieties of Chaenomeles × superba , speciosa and japonica leaves. Carotenoids, chlorophylls, triterpenes, sugars, polyols and acids were analyzed quantitatively and qualitatively using high pressure liquid chromatography (LC) coupled with mass spectrometry (MS), while the mineral profile was determined using atomic absorption spectroscopy (AAS). Moreover, the in vitro anticholinergic potential (inhibition of acetyl-cholinesterase (AChE) and butyryl-cholinesterase (BuChE)) and antioxidant (ABTS, FRAP, ORAC) capacity were evaluated. For the first time in Chaenomeles genotypes 26 carotenoid derivatives and 22 chlorophyll derivatives were identified. Some varieties contained high amounts of carotenoids and chlorophylls ( Ch. × superba ‘Colour Trail’, ‘Nicoline’, ‘Pink Lady’, ‘Texas Scarlet’), and triterpenes ( Ch. speciosa ‘Simonii’, ‘Rubra’, and Ch. × superba ‘Colour Trail’, ‘Nicoline’) and showed high ORAC antioxidant ( Ch. × superba ‘Pink Lady’ and Ch. speciosa ‘Simonii’) and anticholinergic ( Ch. speciosa species) activity. The studied leaves also contained sugars (3.1 to 16.5 mg/100 g), organic acids (3.9–8.1 g/100 g), and minerals (Ca, Cu, Fe, K, Mg, Mn, Na, and Zn). In conclusion, Chaenomeles leaves show potential as a new source for the production of nutraceuticals, as well as for medical and/or cosmetic purposes.

Natural plant sources, particularly the fruits of several lesser-known species, are receiving increasing amounts of attention because they contain a variety of bioactive compounds that are advantageous to human health. The production of easy-to-grow, already-used, and full of nutrients crops could be a solution to the growing problem of a lack of healthful food. One such fruit is the quince (Cydonia oblonga Mill.), which belongs to the Rosaceae family that originated in the Caucasian area and extends to other parts of the world. Quince has been studied for decades because of its unique importance in food and medicine. The characteristic pear-shaped fruit is golden yellow in appearance and has an aromatic, and acidic flavour. The low-fat fruit is rich in numerous necessary nutrients, minerals, dietary fibre, and antioxidants that have significant positive effects on health, but due to its bitterness, it is underutilized. Quince can be utilised as a raw material to create a variety of food products and is a good source of natural phenolic antioxidants, providing significant functional characteristics.

Gelatin films crosslinked with dialdehyde quince seed gum (Gel/DAQSG) were prepared with different blending ratios by solution casting technique. The morphological, structural, thermal, and physical properties of these films were investigated. The addition of DAQSG into the matrix of Gel films led to the chemical crosslinking between the amine groups of Gel, and aldehyde groups of DAQSG. Also, with the increase of DAQSG content, the number of crosslinked networks increased, causing the structure of Gel/DAQSG films became denser and compact. Compared with pure Gel film, Gel/DAQSG film with ratio of 1:2 as the optimal sample exhibited lower water solubility (18.14 ± 0.3%), lower water vapor permeability (2.6 ± 0.2 g mm/h mm 2 Pa), and higher tensile stress (59.5 ± 0.4 MPa). Moreover, the optimal film containing apple peel extract (APE with concentrations of 0.5 and 1 wt%) displayed high antioxidant activity with DPPH scavenging ability, which is 20 and 30 times higher than control film. Also, the antibacterial activities against E. coli and S. areus were significantly ( p  < 0.05) improved. Collectively, Gel/DAQSG with ratio of 1:2 containing APE films illustrated the acceptable potential for using as an active food packaging.

The quince fruit can be an alternative for producing healthy tea because it is a rich source of bioactive compounds. This study was conducted to evaluate the effects of heating (for 20, 40 and 60 min) on the bioactive compounds of quince and quality attributes its tisanes. To this aim, phenolic content of the treated sample (for 40 min according to sensory analysis) was evaluated by HPLC and antioxidant activity was measured using DPPH method. The analysis of sensory evaluation data demonstrated that the heating process significantly improved the color and taste of the quince tisanes. Thermal treatment (180 °C) for 40 min had maximum acceptability. Although, results confirmed negative effects of the heating process on phenolic content, it showed an increase in antioxidant activity. The HPLC data displayed significant reduction in total amount of five identified phenolic compounds from 460.51 to 25.49 mg/25 g extract by heat treatment. In contrast the roasted sample exhibited lower IC50 (663.88 µg/ml) than the unprocessed sample (1098.66 µg/ml). Considering the elevated antioxidant activity achieved through the heating process, the quince tisane can be considered as a healthy beverage.

Research background. In recent years, there has been a growing interest in incorporating fruit-based additives into yogurt formulations as a means to improve the functionality of the product. This study aims to produce a functional product by incorporating quince, which is rich in fibre, vitamins, minerals and antioxidant activity, into a yoghurt formulation. Experimental approach. The influence of the addition of quince powder (0 (control), 0.5, 1.0 and 1.5 %) on the antioxidant and proteolytic activities and culture viability of probiotic yoghurt was investigated for 28 days. Results and conclusions. The viable counts of yoghurt bacteria and Bifidobacterium lactis BB-12® were above 8 log CFU/g. Higher viability of all bacteria was obtained in yoghurt fortified with 1.5 % quince powder than those of other samples after 14 days. Probiotic yoghurt with added 1.5 % quince powder had the highest proteolytic activity during the last two weeks of storage, while the highest total phenolic content and (2,2-diphenyl-1-picrylhydrazyl) radical (DPPH˙) scavenging activity were obtained for the same sample throughout the storage period. Novelty and scientific contribution. Quince powder supports the health of the digestive system thanks to its high fibre content, while it is also rich in vitamins, minerals and antioxidant activity. These properties emphasise the importance of using quince powder in yoghurt production. This innovation has the potential to provide consumers with a tasty alternative, while at the same time increasing the intake of health-promoting ingredients. Furthermore, such products offer higher nutritional value than conventional yoghurt, offering consumers with a healthier option. Therefore, the production of yoghurt with quince powder can be considered as an important innovation in the field of nutrition and a practice that contributes to increasing health awareness.

Quince (Cydonia oblonga) is a medicinal plant and a member of family Rosaceae. It is native plant of Asia Minor and Europe. It is used in production of jam and jellies and also as a remedy of several ailments. The present study was conducted to evaluate the genetic polymorphism based on morphological and molecular traits. Different varieties of Quince were collected from different ecological zones of Khyber Pakhtunkhwa Pakistan and a total of 26 different morphological traits were recorded among studied genotypes. Based on qualitative morphological trait study, the variety collected from Tindodag was unique one with highest fruit weight (328.82 g). The lowest fruit weight (68.38 g) was recorded for Talash genotype. The Charbagh and Tindodag genotypes showed highest seed length (10.6 mm) while genotypes of Chitral was recorded as lowest (8.4 mm). Statistically, significant level of variation was noted with coefficient of variance ranged from 2.23% to 30.38%. Based on correlation analysis, fruit length had strongly correlation with fruit weight (r = 0.89**), Average Fruit width was found significant with fruit weight (r = 0.90**). Similarly, the Core Width was found strongly significant with Core Length (r = 0.95**). ANOVA analysis indicated 10 quantitative characters to be highly significant, 2 significant and 1 insignificant. Principal component analysis was also computed for the 13 quantitative traits with Eigen value of 0.48 and a total variance of 97.78%. The first principal component shows total variation of 52.52%. In PC2 the total variation was 80.15%, PC3 94.06% while in PC4 it was 97.78%. The NCBI BLAST results shows that all the genotypes have similar origin except Tindodag genotype, which shows differences in its origin. Accession number for all other genotypes is MN216014.1, while accession number of Tindodag genotype is KF861967.1. Based on this study, it can be concluded that Tindodag genotype is unique out of the studied localities. NCBI BLAST have provided further support for the drawn conclusion.

Cydonia oblonga M. (Quince), a deciduous shrub from the family Rosaceae , has been recognized in the last decade mainly because of its potential to prevent/cure cancer, high cholesterol, blood sugar, chronic stress, peptic ulcer, liver injuries, asthma, and various fertility disorders. Several metabolites, including flavonoids, phenolic acids, polyphenols, carotenoids, lignans, stilbenes, triterpenoids, procyanidins, glycosides, and organic acids, have been identified as the major phytochemical components. Different parts of C. oblonga are known to demonstrate a broad spectrum of biological activities against numerous microbial infections, free radicals-mediated damages, cancer cells proliferation, lipid profile dysfunction, glucose metabolism disorder, lethal oxalocalcic kidney stones, hydatid cysts of protoscolices, and inflammatory diseases. In preclinical trials, neuro-protective, anti-hyperglycemic, anti-hyperlipidemic, anti-inflammatory, and wound healing activities and protective effects on hepatocellular carcinoma, testicular tissue alteration, endocrine disruption, cardiotoxicity, depression, and blood pressure have been investigated for the valuable plant. The clinical studies explore the plant's potential to treat reproductive, respiratory, and gastrointestinal disorders and support using C. oblonga as a new herbal medicine. However, additional research is needed to unravel its intricate action mechanisms, evaluate safe dosing strategies, identify any adverse effects, and validate its pharmacological effects in a broad population over a longer timeframe before approving it as a new herbal treatment. In conclusion, the review presents detailed analyses of the phytochemistry, pharmacology, preclinical, and clinical trials of C . oblonga .

As a valuable Chinese traditional medicinal species, Chaenomeles speciosa (Sweet) Nakai (C. speciosa) is a natural resource with significant economic and ornamental value. However, its genetic information is not well understood. In this study, the complete mitochondrial genome of C. speciosa was assembled and characterized to explore the repeat sequences, recombination events, rearrangements, and IGT, to predict RNA editing sites, and to clarify the phylogenetic and evolutionary relationship. The C. speciosa mitochondrial genome was found to have two circular chromosomes as its major conformation, with a total length of 436,464 bp and 45.2% GC content. The mitochondrial genome contained 54 genes, including 33 unique protein-coding genes, 18 tRNAs, and 3 rRNA genes. Seven pairs of repeat sequences involving recombination events were analyzed. Both the repeat pairs, R1 and R2, played significant roles in mediating the major and minor conformations. In total, 18 MTPTs were identified, 6 of which were complete tRNA genes. There were 454 RNA editing sites in the 33 protein-coding sequences predicted by the PREPACT3 program. A phylogenetic analysis based on 22 species of mitochondrial genomes was constructed and indicated highly conserved PCG sequences. Synteny analyses showed extensive genomic rearrangements in the mitochondrial genome of C. speciosa and closely related species. This work is the first to report the C. speciosa mitochondrial genome, which is of great significance for conducting additional genetic studies on this organism.