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Melon (Cucumis melo L.) is a globally grown crop renowned for its juice and flavor. Despite growth in production, the melon industry faces several challenges owing to a wide range of biotic and abiotic stresses throughout the growth and development of melon. The aim of the review article is to consolidate current knowledge on the genetic mechanism of both biotic and abiotic stress in melon, facilitating the development of robust, disease-resistant melon varieties. A comprehensive literature review was performed, focusing on recent genetic and molecular advancements related to biotic and abiotic stress responses in melons. The review emphasizes the identification and analysis of quantitative trait loci (QTLs), functional genes, and molecular markers in two sections. The initial section provides a comprehensive summary of the QTLs and major and minor functional genes, and the establishment of molecular markers associated with biotic (viral, bacterial, and fungal pathogens, and nematodes) and abiotic stress (cold/chilling, drought, salt, and toxic compounds). The latter section briefly outlines the molecular markers employed to facilitate marker-assisted backcrossing (MABC) and identify cultivars resistant to biotic and abiotic stressors, emphasizing their relevance in strategic marker-assisted melon breeding. These insights could guide the incorporation of specific traits, culminating in developing novel varieties, equipped to withstand diseases and environmental stresses by targeted breeding, that meet both consumer preferences and the needs of melon breeders.
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Cucumis melo , Melhoramento Vegetal , Locos de Características Quantitativas , Estresse Fisiológico , Cucumis melo/genética , Estresse Fisiológico/genética , Melhoramento Vegetal/métodos , Marcadores Genéticos , Resistência à Doença/genética , Doenças das Plantas/genética , Doenças das Plantas/microbiologiaRESUMO
Melon (Cucumis melo L.) is an important crop that is cultivated worldwide for its fleshy fruit. Understanding the genetic basis of a plant's qualitative and quantitative traits is essential for developing consumer-favored varieties. This review presents genetic and molecular advances related to qualitative and quantitative phenotypic traits and biochemical compounds in melons. This information guides trait incorporation and the production of novel varieties with desirable horticultural and economic characteristics and yield performance. This review summarizes the quantitative trait loci, candidate genes, and development of molecular markers related to plant architecture, branching patterns, floral attributes (sex expression and male sterility), fruit attributes (shape, rind and flesh color, yield, biochemical compounds, sugar content, and netting), and seed attributes (seed coat color and size). The findings discussed in this review will enhance demand-driven breeding to produce cultivars that benefit consumers and melon breeders.
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Cucumis melo , Cucurbitaceae , Cucumis melo/genética , Cucurbitaceae/genética , Cucurbitaceae/metabolismo , Melhoramento Vegetal , Locos de Características Quantitativas , Frutas/genética , Estudos de Associação GenéticaRESUMO
The fruit flesh of watermelons differs depending on the distinct carotenoid composition. Orange-colored flesh relates to the accumulation of ß-carotene, which is beneficial to human health. Canary-yellow-fleshed OTO-DAH and orange-ß-fleshed (orange-fleshed with high ß-carotene) NB-DAH near-isogenic lines (NILs) were used to determine the genetic mechanism attributed to orange watermelon flesh. For genetic mapping, an F2 population was developed by crossing the two NILs. The segregation ratio of flesh color in the F2 population indicated that the orange-ß flesh of the NB-DAH NIL was controlled by a single incompletely dominant gene. Through a comparative analysis of the whole-genome sequences of the parent lines and NILs, a major introgression region unique to the NB-DAH NIL was detected on Chr. 1; this was considered a candidate region for harboring genes that distinguish orange from canary-yellow and red flesh. Among the 13 genes involved in the carotenoid metabolic pathway in watermelons, only ClPSY1 (ClCG01G008470), which encodes phytoene synthase 1, was located within the introgression region. The genotyping of F2 plants using a cleaved amplified polymorphic sequence marker developed from a non-synonymous SNP in ClPSY1 revealed its relationship with orange-ß flesh. The insights gained in this study can be applied to marker-assisted breeding for this desirable trait.
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Melhoramento Vegetal , beta Caroteno , Humanos , Carotenoides , Marcadores Genéticos , Mapeamento CromossômicoRESUMO
Cardiac rhabdomyoma is the most common primary cardiac tumour and is considered to be a hamartoma of developing embryonic cardiac myocytes. It is commonly seen in tuberous sclerosis. The size and location of the tumour is the surrogate determinant of the risk of haemodynamic compromise. Pericardial rhabdomyoma is very rare and tends to follow the inherent natural history of spontaneous regression. We present cases of two foetuses diagnosed with large pericardial rhabdomyoma and no haemodynamic consequences.
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Doenças Fetais , Neoplasias Cardíacas , Rabdomioma , Esclerose Tuberosa , Feminino , Humanos , Gravidez , Rabdomioma/diagnóstico por imagem , Doenças Fetais/diagnóstico , Neoplasias Cardíacas/diagnóstico por imagem , Diagnóstico Pré-NatalRESUMO
INTRODUCTION: The World Health Organization identified a chronic shortage of psychiatrists in Low- Middle- and High-Income Countries. In Qatar, the situation is dire with reports there is one psychiatrist per 170,000 people in the population. A one-day, student-led mental-health conference was held in Doha, Qatar under the auspices of the World Psychiatric Association with the aim of increasing interest in psychiatry as a career. SUBJECTS AND METHODS: In this single-arm, pre-post comparison study, a questionnaire assessing interest in psychiatry as a career was administered on participants before and after attending the conference. Demographic information was obtained and response items were on a 5-point Likert scale. Statistical analysis was performed using a two-sample t-test with a significant p-value set at <0.05. RESULTS: The conference was attended by 102 individuals. Fifty-four attendees completed the pre-conference survey (53% response rate) and 36 participants completed the post-conference survey (35% response rate). Data for the 36 matched pre-post responses were included in our analyses. The average age of respondents was 22 years and 81% were female. There was improvement in post-conference results however these changes were not statistically significant. CONCLUSION: To the best of our knowledge this is the first intervention study on increasing interest in psychiatry as a career carried out in Qatar. It is likely that psychiatry enthusiasts attended the conference and therefore their interest in this medical specialty was already high as corroborated by the favorable pre-conference survey results. This might explain why there was a lack of statistical significance in comparison to post- intervention scores. We recommend that such an event be integrated into the medical school curricula throughout Qatar to include students with low baseline interest in psychiatry. Further research in this area with more robust methodology is urgently needed to help narrow the pervasive treatment gap.
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Escolha da Profissão , Psiquiatria , Estudantes de Medicina , Adulto , Feminino , Humanos , Masculino , Projetos Piloto , Catar , Inquéritos e Questionários , Adulto JovemRESUMO
The current study was designed to check the antioxidant and enzyme inhibition potential of various extracts/ fractions of three selected plants. The aerial parts of Conocarpus erectus (Combretaceae), Ficus variegata (Moraceae) and Ficus maclellandii (Moraceae) were extracted with ethanol (95%) and the resulting crude extracts were partitioned with n-hexane, chloroform and n-butanol successively. Folin-Ciocalteu reagent was used to calculate the total phenolic contents, flavonoids contents were calculated with aluminum chloride while antioxidant and enzyme studies were carried out through standard protocols. All extracts/fractions contained reasonable amount of phenolic compounds ranging from 0.58-58.23 mg CE/g of DW and 0.43-30.56 mg GAE/g of DW. Total flavonoids were determined using rutin and quercetin standards, ranging from 2.65-18.2 mg rutin equivalent/g of dry weight and 0.92-5.41 mg quercetin equivalent/g of dry weight. Antioxidant studies such as DPPH inhibition FRAP and total antioxidant capacity (TAC) was checked. The crude ethanolic extract of C. erectus showed maximum antiradical scavenging power (90.43%; IC50=7 µg) and ferric reducing antioxidant power (16.5 µM eq.FeSO4.7H2O), respectively while leave extract of F. variegata (chloroform) was the most active (0.6577) in TAC among other extracts of the selected medicinal plants. Butanolic leave extract of C. erectus exhibited maximum enzyme inhibition activity (91.62% with IC50 40 µg/ml) while other extracts showed significant activity. It was observed from results that all extracts/fractions of under consideration plants, exhibited significant bioactivities especially ethanolic and butanolic fractions, which may be the richest source of such type of activities.
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Antioxidantes/farmacologia , Inibidores da Colinesterase/farmacologia , Combretaceae/química , Ficus/química , Extratos Vegetais/farmacologia , Acetilcolinesterase/metabolismo , Antioxidantes/isolamento & purificação , Compostos de Bifenilo/química , Inibidores da Colinesterase/isolamento & purificação , Relação Dose-Resposta a Droga , Compostos Férricos/química , Proteínas Ligadas por GPI/antagonistas & inibidores , Proteínas Ligadas por GPI/metabolismo , Humanos , Fitoterapia , Picratos/química , Componentes Aéreos da Planta , Extratos Vegetais/isolamento & purificação , Plantas Medicinais , Solventes/químicaRESUMO
Bioassay guided fractionation of Cinnamon tamala leaf extracts yielded bornyl acetate (1), caryophylene oxide (2), p-coumaric acid (3) and vanillic acid (4) using A-2780 human ovarian cancer cell lines. The structures of the isolated compounds were confirmed through spectroscopic techniques (EIMS, (1)H and (13)C NMR). Compound 1 exhibited highest cytotoxicity with 90.16 ± 1.06% inhibition (IC50=5.30 x 10(-4) mg/ml) followed by compound 2 (84.40±1.53% inhibition; IC50=8.94 x 10(-3)mg/ml), while compounds 3 and 4 were inactive in the bioassay.
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Antineoplásicos Fitogênicos/farmacologia , Carcinoma , Proliferação de Células/efeitos dos fármacos , Cinnamomum , Neoplasias Ovarianas , Extratos Vegetais/farmacologia , Animais , Canfanos/farmacologia , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Ácidos Cumáricos/farmacologia , Cricetinae , Ensaios de Seleção de Medicamentos Antitumorais , Feminino , Humanos , Extratos Vegetais/química , Folhas de Planta , Sesquiterpenos Policíclicos , Propionatos , Sesquiterpenos/farmacologia , Ácido Vanílico/farmacologiaRESUMO
BACKGROUND: Orange peel (Citrus sinensis) and green tea (Camellia sinensis) leaves, rich sources of food flavonoids, were analyzed for their trypsin inhibitory potential. Hesperetin, rutin and hesperidin from orange peel, and catechin from green tea leaves, were isolated and their chemical structures were analyzed. All four compounds were evaluated for their trypsin inhibitory potential. RESULTS: Among all the isolated compounds, rutin exhibited the highest protease inhibition activity (75.4 ± 0.9%) with IC50 = 16 ± 2 µmol L(-1), followed by catechin (65.3 ± 1.4%; IC50 = 83 ± 9 µmol L(-1)), hesperetin (62.1 ± 1.3%; IC50 = 104 ± 12 µmol L(-1)) and hesperidin (59.7 ± 1.1%; IC50 = 127 ± 14 µmol L(-1)). Lineweaver-Burk and Dixon plots and their secondary replots indicated that all four compounds possessed non-competitive inhibition. The Ki values of hesperetin, rutin, hesperidin and catechin were calculated as 90.2 ± 1.1, 17.5 ± 0.6, 84.2 ± 1.5 and 65.1 ± 1.5 µmol L(-1) respectively. CONCLUSION: The present results suggest that the four isolated flavonoids can be used as a supplement in food for the treatment of pathologies associated with the degradation of a specific protein.
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Camellia sinensis/química , Citrus sinensis/química , Flavonoides/farmacologia , Frutas/química , Folhas de Planta/química , Inibidores da Tripsina/farmacologia , Tripsina/metabolismo , Catequina/isolamento & purificação , Catequina/farmacologia , Suplementos Nutricionais , Flavonoides/isolamento & purificação , Hesperidina/isolamento & purificação , Hesperidina/farmacologia , Humanos , Concentração Inibidora 50 , Rutina/isolamento & purificação , Rutina/farmacologia , Inibidores da Tripsina/isolamento & purificaçãoRESUMO
Breeding is the most important and efficient method for crop improvement involving repeated modification of the genetic makeup of a plant population over many generations. In this review, various accessible breeding approaches, such as conventional breeding and mutation breeding (physical and chemical mutagenesis and insertional mutagenesis), are discussed with respect to the actual impact of research on the economic improvement of tomato agriculture. Tomatoes are among the most economically important fruit crops consumed worldwide because of their high nutritional content and health-related benefits. Additionally, we summarize mutation-based mapping approaches, including Mutmap and MutChromeSeq, for the efficient mapping of several genes identified by random indel mutations that are beneficial for crop improvement. Difficulties and challenges in the adaptation of new genome editing techniques that provide opportunities to demonstrate precise mutations are also addressed. Lastly, this review focuses on various effective and convenient genome editing tools, such as RNA interference (RNAi), zinc finger nucleases (ZFNs), transcription activator-like effector nucleases (TALENs), and clustered regularly interspaced short palindromic repeats (CRISPR/Cas9), and their potential for the improvement of numerous desirable traits to allow the development of better varieties of tomato and other horticultural crops.
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Solanum lycopersicum , Humanos , Solanum lycopersicum/genética , Engenharia Genética/métodos , Melhoramento Vegetal/métodos , Genoma de Planta/genética , Produtos Agrícolas/genética , Mutagênese/genética , Sistemas CRISPR-Cas/genéticaRESUMO
Mutagenic effectiveness and efficiency are the utmost vital indices to determine the effective and efficient mutagenic concentrations for the generation of high frequency of desirable mutation in mutation breeding. Nevertheless, there are meager study are available for employing effective and efficient concentration of caffeine, EMS, Pb(NO3)2 and Cd(NO3)2 for the crop improvement. Thus, the current study was performed to assess the mutagenic effectiveness and efficiency of caffeine, EMS and heavy metals [Pb(NO3)2 Cd(NO3)2] and to determine the genetic variability of M2 and M3 lentil mutant lines. The frequency of different chlorophyll and chromophyll mutation was found highest at moderate and higher concentrations of chemical mutagens and heavy metals in M1 and M2 generation. The highest effectiveness was in 20 ppm Cd(NO3)2, followed by 20 ppm Pb(NO3)2, 0.10% EMS, and 0.10% caffeine. The present investigation also showed lower doses of caffeine, EMS, Pb(NO3)2, and Cd(NO3)2 were more efficient than higher concentrations, and caffeine was found more efficient followed by EMS, Pb(NO3)2, and Cd(NO3)2. Furthermore, a broad spectrum of viable mutations affecting different morphological characters of the plants viz., leaves, plant height, growth habits, flowers, pods, and seeds in M2 and M3 generation were recorded. Ten morphological mutants showing acceptable agronomic and horticultural features were identified, as genetic resources for further breeding.
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Lentil belonging to the fabaceae family is a proteinaceous cool-season legume consumed across the world. However, lentil is low yielding with a narrow genetic base compared to other grain legumes such as chickpea, faba bean, and cowpea. In the present study, we intended to investigate the effect of two different mutagens viz., caffeine and lead nitrate on the bio-physiological and agronomical traits of lentil. Unlike other mutagens like ethyl methanesulphonate, sodium azide, and hydrazine hydrates very little is known about the mutagenic potency of caffeine and lead nitrate. The results revealed contrasting effects as lower doses of caffeine-induced a substantial increase in mean values of physiological and agronomical traits whereas both lower and higher doses of lead nitrate negatively impacted the agronomical traits of lentil. Among the mutagen doses, 0.1% caffeine was most efficient in inducing a substantial increase in mean values of bio-physiological and quantitative traits. The present study also revealed the successful conduct of induced mutagenesis in lentil and present a protocol that could be followed in future breeding programs aimed at increasing the yielding potential of legumes.
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The world's population is increasing and is anticipated to spread 10 billion by 2050, and the issue of food security is becoming a global concern. To maintain global food security, it is essential to increase crop productivity under changing climatic conditions. Conventional agricultural practices frequently use artificial/chemical fertilizers to enhance crop productivity, but these have numerous negative effects on the environment and people's health. To address these issues, researchers have been concentrating on substitute crop fertilization methods for many years, and biofertilizers as a crucial part of agricultural practices are quickly gaining popularity all over the globe. Biofertilizers are living formulations made of indigenous plant growth-promoting rhizobacteria (PGPR) which are substantial, environment-friendly, and economical biofertilizers for amassing crop productivity by enhancing plant development either directly or indirectly, and are the renewable source of plant nutrients and sustainable agronomy. The review aims to provide a comprehensive overview of the current knowledge on microbial inoculants as biofertilizers, including their types, mechanisms of action, effects on crop productivity, challenges, and limitations associated with the use of microbial inoculants. In this review, we focused on the application of biofertilizers to agricultural fields in plant growth development by performing several activities like nitrogen fixation, siderophore production, phytohormone production, nutrient solubilization, and facilitating easy uptake by crop plants. Further, we discussed the indirect mechanism of PGPRs, in developing induced system resistance against pest and diseases, and as a biocontrol agent for phytopathogens. This review article presents a brief outline of the ideas and uses of microbial inoculants in improving crop productivity as well as a discussion of the challenges and limitations to use microbial inoculants.
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The flesh color of watermelon is an important trait that is determined by carotenoid composition and affects consumers' fruit desirability. Although a complete dominant control by C locus (Cllcyb) for canary yellow flesh (CY) over red flesh has been reported, red and CY colors frequently appear as a mixed pattern in the same flesh (incomplete canary yellow, ICY) in F1 and inbred lines carrying dominant C alleles. Therefore, we examined the genetic control of the mixed color pattern in ICY using whole-genome resequencing of three ICY (ICY group) and three CY inbred lines (CY group), as well as genetic linkage mapping of an F2 population. The segregation pattern in 135 F2 plants indicated that CY is controlled by a single locus (named C 2) dominant over ICY. The whole-genome resequencing of ICY and CY inbred lines revealed an ICY/CY-specific region of approximately 27.60-27.88 Mb on Chr. 2 that was polymorphic between the ICY and CY groups. Our genetic map, using nine cleaved amplified polymorphic sequence markers developed based on the single-nucleotide polymorphisms from the ICY/CY-specific region, confirmed that C 2 is located on Chr. 2 and cosegregated with the marker (M7) derived from a non-synonymous single-nucleotide polymorphism of the pentatricopeptide repeat (PPR) gene (ClPPR, Cla97C02G039880). Additionally, 27 watermelon inbred lines of ICY, CY, and red flesh were evaluated using previously reported Cllcyb (C locus)-based markers and our C 2 locus-linked ClPPR-based marker (M7). As a result, dominant alleles at the C 2 locus were required to produce CY, in addition to dominant alleles at the C locus, while a recessive homozygous genotype at the C locus gave the red flesh irrespective of the genotype at the C 2 locus. Using a ClPPR-based cleaved amplified polymorphic sequence developed in this study and Cllcyb-based markers, watermelon cultivars with CY, ICY, and red flesh could be successfully discerned, implying that the combined use of these markers will be efficient for marker-assisted selection of flesh color in watermelon breeding.
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BACKGROUND: Autism spectrum disorder (ASD) is a neurodevelopmental condition characterized by impaired social and communication skills, restricted interests, and repetitive behaviors. The prevalence of ASD among children in Qatar was recently estimated to be 1.1%, though the genetic architecture underlying ASD both in Qatar and the greater Middle East has been largely unexplored. Here, we describe the first genomic data release from the BARAKA-Qatar Study-a nationwide program building a broadly consented biorepository of individuals with ASD and their families available for sample and data sharing and multi-omics research. METHODS: In this first release, we present a comprehensive analysis of whole-genome sequencing (WGS) data of the first 100 families (372 individuals), investigating the genetic architecture, including single-nucleotide variants (SNVs), copy number variants (CNVs), tandem repeat expansions (TREs), as well as mitochondrial DNA variants (mtDNA) segregating with ASD in local families. RESULTS: Overall, we identify potentially pathogenic variants in known genes or regions in 27 out of 100 families (27%), of which 11 variants (40.7%) were classified as pathogenic or likely-pathogenic based on American College of Medical Genetics (ACMG) guidelines. Dominant variants, including de novo and inherited, contributed to 15 (55.6%) of these families, consisting of SNVs/indels (66.7%), CNVs (13.3%), TREs (13.3%), and mtDNA variants (6.7%). Moreover, homozygous variants were found in 7 families (25.9%), with a sixfold increase in homozygous burden in consanguineous versus non-consanguineous families (13.6% and 1.8%, respectively). Furthermore, 28 novel ASD candidate genes were identified in 20 families, 23 of which had recurrent hits in MSSNG and SSC cohorts. CONCLUSIONS: This study illustrates the value of ASD studies in under-represented populations and the importance of WGS as a comprehensive tool for establishing a molecular diagnosis for families with ASD. Moreover, it uncovers a significant role for recessive variation in ASD architecture in consanguineous settings and provides a unique resource of Middle Eastern genomes for future research to the global ASD community.
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Transtorno do Espectro Autista , Criança , Humanos , Transtorno do Espectro Autista/epidemiologia , Transtorno do Espectro Autista/genética , Catar/epidemiologia , Genoma , Variações do Número de Cópias de DNA , Genômica , DNA Mitocondrial , Predisposição Genética para DoençaRESUMO
In the title compound, C(17)H(13)NO(2)S(2), the dihedral angles between the 2-sulfanyl-idene-1,3-thia-zolidin-4-one group and the pendant toluene and 2-hy-droxy-benzene rings are 74.62â (6) and 8.73â (12)°, respectively. An intra-molecular C-Hâ¯S inter-action occurs. In the crystal, inversion dimers linked by pairs of O-Hâ¯O hydrogen bonds generate R(2) (2)(16) loops. This link is reinforced by a pair of C-Hâ¯O hydrogen bonds. The dimers are connected by weak C-Hâ¯S inter-actions.
RESUMO
In the crystal structure of title compound, C(9)H(10)N(2)OS, there are two symmetry-independent mol-ecules, each having an intra-molecular N-Hâ¯O hydrogen bond generating an S(6) ring motif. The benzene rings and the virtually planar acetyl-thoiurea fragments [r.m.s. deviations = 0.0045 and 0.0341â Å] are oriented at dihedral angles of 50.71â (6) and 62.79â (6)° in the two mol-ecules. In the crystal, N-Hâ¯S and N-Hâ¯O hydrogen bonds link mol-ecules via cyclic R(2) (2)(8) and R(2) (2)(12) motifs into a one-dimensional polymeric network extending along [101]. The intra- and inter-molecular N-Hâ¯O inter-actions are part of a three-center hydrogen bond. A C-Hâ¯S inter-action also occurs.
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In the title compound, C(9)H(9)N(3)O(3)S, the benzene ring and the N-carbamothio-ylacetamide unit are oriented at a dihedral angle of 54.82â (4)°. The dihedral angle between the ring and its attached nitro group is 28.54â (12)°. An intra-molecular, bifurcated N-Hâ¯(O,O) hydrogen bond generates two S(6) rings. In the crystal, inversion dimers linked by pairs of N-Hâ¯S hydrogen bonds generate R(2) (2)(8) loops. Weak C-Hâ¯O inter-actions link the dimers.
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In the title compound, C(10)H(12)N(2)OS, the toluene and the N-carbamothio-ylacetamide units are oriented at dihedral angle of 78.75â (5)°. An intra-molecular N-Hâ¯O hydrogen bond generates an S(6) ring. In the crystal, mol-ecules are linked into [101] chains by pairs of N-Hâ¯S hydrogen bonds [which generate R(2) (2)(8) loops] and pairs of O-Hâ¯O hydrogen bonds [which generate R(2) (2)(4) loops]. The two motifs alternate in the chain.
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In the title compound, C(9)H(9)ClN(2)OS, the 3-chloro-phenyl and acetyl-thio-urea fragments are oriented at a dihedral angle of 62.68â (5)°. An intra-molecular N-Hâ¯O hydrogen bond generates an S(6) ring motif. Mol-ecules are linked into dimers via a cyclic R(2) (2)(8) motif of N-Hâ¯S hydrogen bonds. These dimers are further connected through C-Hâ¯S inter-actions, completing an R(2) (2)(12) motif, into chains along [010].
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Vasicine (1) was isolated from the ethanolic extract of Adhatoda vasica Nees (Acanthaceae) and the structure was confirmed using spectroscopic techniques. Acetylcholine esterase, trypsin, DPPH inhibition potential and FRAP assay were carried out using in vitro models. The results showed 38.4 ± 1.2% and 37.4 ± 1.1% activity in acetylcholine and trypsin inhibition assays respectively. The compound (1) exhibited significant DPPH inhibition activity (70.4 ± 1.3%, IC(50) = 212.3 ± 1.9 µM). A dose dependant behavior of vasicine (1), was indicated in the FRAP assay. Antibacterial activity was checked according to agar well diffusion assay and results revealed that vasicine (1) showed moderate activity.