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Polar Nuclei Behaviour In The Mature Megagametophyte Of The Natural Tetraploid Trifolium Pratense (Fabaceae), Hati̇ce Nurhan Büyükkartal
Polar Nuclei Behaviour In The Mature Megagametophyte Of The Natural Tetraploid Trifolium Pratense (Fabaceae), Hati̇ce Nurhan Büyükkartal
Turkish Journal of Botany
The mature female gametophyte in Trifolium pratense L., a natural tetraploid plant, consists of 7 cells: the egg cell, 2 synergids, the central cell, and 3 antipodal cells. This type of mature female gametophyte is known as polygonum. The central cell occupies the largest portion of the mature female gametophyte and the polar nuclei are situated close to the egg apparatus. The cytoplasm of the central cell is rich in organelles. A large number of rough and smooth endoplasmic reticulum, mitochondria, plastids, dictyosomes, ribosomes, starch, and lipid bodies were observed. Differences were identified in this plant between the sizes of …
Species Composition And Distribution Of Centric Diatoms From Türkmen Mountain (Sakarya River Basin/Turkey), Cüneyd Nadi̇r Solak, Maxim Kulikovskiy
Species Composition And Distribution Of Centric Diatoms From Türkmen Mountain (Sakarya River Basin/Turkey), Cüneyd Nadi̇r Solak, Maxim Kulikovskiy
Turkish Journal of Botany
Diatoms are used for monitoring the environmental conditions of water. We have little information about centric diatoms in Turkish freshwaters. A total of 50 samples were collected from some springs and small streams of Türkmen Mountain. As a result, 7 species [Cyclotella meneghiniana Kützing, C. ocellata Pantocsek, Cyclostephanos dubius (Fricke) Round, Handmannia balatonis (Pantocsek) Kulikovskiy & Solak comb. nov., Melosira varians Agardh, Stephanodiscus hantzschii Grunow, and S. minutulus (Kützing) Cleve & Möller] were identified, and we also suggest in this study that a new combination for Cyclotella balatonis Pantocsek should be Handmannia balatonis comb. nov. and for C. praetermissa Lund …
Taxonomic Update Of Adenocalymma (Bignoniaceae): Emendations, New Synonyms, Typifications, And Status Change, Renata Udulutsch, Marco Antonio Assis, Pedro Dias
Taxonomic Update Of Adenocalymma (Bignoniaceae): Emendations, New Synonyms, Typifications, And Status Change, Renata Udulutsch, Marco Antonio Assis, Pedro Dias
Turkish Journal of Botany
A recent taxonomic treatment of Adenocalymma resulted in nomenclatural changes associated with 47 names and 24 species. Seven emendations, 16 new synonyms, 29 typifications (24 of which are lectotypifications), 4 neotypifications, 1 epitypification, and 1 status change are proposed. Emendations are related primarily to the first description of the fruit of Adenocalymma dichilum, A. divaricatum, A. fruticosum, A. hypostictum, A. macrophyllum, A. salmoneum, and A. scabriusculum. A variety of Adenocalymma, A. marginatum var. apterospermum, has been raised to the rank of species (A. apterospermum).
The Identity Of Magnolia Odoratissima (Magnoliaceae) From China, Shugang Chen, Qingwen Zeng
The Identity Of Magnolia Odoratissima (Magnoliaceae) From China, Shugang Chen, Qingwen Zeng
Turkish Journal of Botany
The type specimen of Magnolia odoratissima Y.W.Law & R.Z.Zhou (Magnoliaceae) conflicts with the protologue and belongs to the genus Parakmeria Hu & W.C.Cheng. A new name, Magnolia kwangnanensis S.G.Chen & Q.W.Zeng sp. nov., and a new type are designated to accommodate the original description. Here we provide new data and a detailed morphological description for this species. Notes are also presented on its habitat, pollen morphology, and conservation status.
Physioanatomical Adaptations In Response To Salt Stress In Sporobolus Arabicus (Poaceae) From The Salt Range, Pakistan, Mansoor Hameed, Tahira Nawaz, Muhammad Ashraf, Nargis Naz, Riffat Batool, Muhammad Sajid Aqeel Ahmad, Atif Riaz
Physioanatomical Adaptations In Response To Salt Stress In Sporobolus Arabicus (Poaceae) From The Salt Range, Pakistan, Mansoor Hameed, Tahira Nawaz, Muhammad Ashraf, Nargis Naz, Riffat Batool, Muhammad Sajid Aqeel Ahmad, Atif Riaz
Turkish Journal of Botany
Sporobolus arabicus Boiss. is a perennial stoloniferous grass that prefers a saline or desert habitat. A natural population of Sporobolus arabicus growing in a salty area was compared with a normal nonsaline population. The salt-tolerant population showed better growth than its counterpart. Physioanatomical adaptations to saline environments in the salt-tolerant population were very specific. They included restricted toxic ion uptake, production of organic osmolytes, sclerification in roots, succulence in stem, and development of vesicular hairs on the leaves. These adaptations were not only for the excretion of toxic ions but also for the accumulation of inorganic ions in the parenchymatous …
The Comparison Of Grime’S Strategies Of Plant Taxa In Hacı Osman Forest And Bafra Fish Lakes In The Central Black Sea Region Of Turkey, Rena Hüseyi̇nova, Mahmut Kilinç, Hamdi̇ Güray Kutbay, Dudu Duygu Kiliç, Ali̇ Bi̇lgi̇n
The Comparison Of Grime’S Strategies Of Plant Taxa In Hacı Osman Forest And Bafra Fish Lakes In The Central Black Sea Region Of Turkey, Rena Hüseyi̇nova, Mahmut Kilinç, Hamdi̇ Güray Kutbay, Dudu Duygu Kiliç, Ali̇ Bi̇lgi̇n
Turkish Journal of Botany
The main aim of this study was to compare Grime's strategies in 91 plant taxa occurring from the eastern to the western part of the central Black Sea region of northern Turkey (Samsun). To do this, 45 sample plots were taken from different community types (from swamp forests to halophytic communities), and the strategies of plant species were compared with each other. Many tree and shrub species present in Hacı Osman Forest, a protected swamp forest, exhibited a purely competitive (C) strategy; some other tree and shrub species exhibited secondary strategies such as competitive/competitive stress-tolerant (C/CS) and competitive/competitive ruderal (C/CR). …
Seasonal Variation Of Litter Accumulation And Putrefaction With Reference To Decomposers In A Mangrove Forest In Karachi, Pakistan, Kanwal Nazim, Moinuddin Ahmed, Syed Shahid Shaukat, Muhammad Uzair Khan
Seasonal Variation Of Litter Accumulation And Putrefaction With Reference To Decomposers In A Mangrove Forest In Karachi, Pakistan, Kanwal Nazim, Moinuddin Ahmed, Syed Shahid Shaukat, Muhammad Uzair Khan
Turkish Journal of Botany
Litter production and its decomposition is a major source of nutrients for mangrove ecosystems. This study was conducted on a naturally growing mangrove population in the Sandspit area in Karachi, Pakistan, during 2007 and 2008. Avicennia marina (Forssk.) Vierh. forms an almost pure population in Sandspit mangrove swamps. To examine the details of temporal fluctuation in litter accumulation and its decomposition, observations were taken at monthly intervals. Results showed that the maximum litter accumulation occurred during the monsoon and post-monsoon season with the maximum accumulation in August (68.76 ± 8.72 g/m^2), while minimum litter accretion occurred in January (13.61 ± …
The Phylogeny Of Heterocapsa Sp. (Dinophyceae) Isolated From The South Coast Of Iran During A Cochlodinium Polykrikoides Bloom, Gilan Attaran Fariman, Pegah Javid
The Phylogeny Of Heterocapsa Sp. (Dinophyceae) Isolated From The South Coast Of Iran During A Cochlodinium Polykrikoides Bloom, Gilan Attaran Fariman, Pegah Javid
Turkish Journal of Botany
The genus Heterocapsa Stein is a relatively small armoured dinoflagellate. Because it has few differences in morphological characteristics among its species, species identification is difficult. In this study, small Heterocapsa sp. cells associated with a dense bloom of Cochlodinium polykrikoides Margalef were collected from the south-east coast of Iran. While Heterocapsa sp. was isolated, C. polykrikoides could not be isolated by single cell or serial dilution methods. Thus, a unialgal strain of Heterocapsa sp. was used for molecular analysis and species identification. In order to carry out phylogenetic analysis, rDNA was extracted and large subunit domains of D1-D3 were sequenced. …
When Island-Like Populations At High Elevation Show Genetic Divergence Despite No Morphological Variability: The Case Of Lupinus Montanus In Central Mexico, Maxime Ferval, Luc Legal, Charles Gers, Céline Pélissier, Peter Winterton, Jesús Arnoldo Sánchez López, María Luisa Corona Rangel, Kalina Bermudez Torres
When Island-Like Populations At High Elevation Show Genetic Divergence Despite No Morphological Variability: The Case Of Lupinus Montanus In Central Mexico, Maxime Ferval, Luc Legal, Charles Gers, Céline Pélissier, Peter Winterton, Jesús Arnoldo Sánchez López, María Luisa Corona Rangel, Kalina Bermudez Torres
Turkish Journal of Botany
Lupinus montanus subsp. montanus var. montanus Kunth is a widespread taxon occurring throughout the highlands of Central Mexico and Guatemala. Populations of this variety show little variation in plant morphology, but their highly disjunct island-like distribution suggests that genetic differentiation between populations should be expected. To test this idea, we assessed genetic diversity among 13 populations of Lupinus montanus var. montanus growing on the 6 main volcanoes of the Trans-Mexican Volcanic Belt (TMVB) using 4 intersimple sequence repeat markers to quantify genetic divergence. The 93 loci identified showed significant differentiation between populations (F_{ST} \approx 0.5) and high levels of genetic …
Qtl Mapping Of Some Productivity And Fibre Traits In Gossypium Arboreum, Tayyaba Shaheen, Yusuf Zafar, Mehboob-Ur Rahman
Qtl Mapping Of Some Productivity And Fibre Traits In Gossypium Arboreum, Tayyaba Shaheen, Yusuf Zafar, Mehboob-Ur Rahman
Turkish Journal of Botany
This study explains the construction of an intraspecific genetic linkage map of the A-genome diploid cotton with simple sequence repeat (SSR) and randomly amplified polymorphic DNA (RAPD) markers, using 180 F_2 plants derived from the cross of 2 Gossypium arboreum cotton cultivars (Ravi × Entry-17). Polymorphisms between the 2 parents were detected using 1089 pairs of SSR primers and 520 RAPD primers. In total, 34 pairs of SSR primer-amplified and 18 RAPD primer-amplified polymorphic loci were selected to survey the F2 population. In total, 52 polymorphic DNA fragments were generated and used to construct a linkage map with JoinMap 3.0. …
Systematic Implications Of Seed Coat Diversity In Some Representatives Of The Genus Ipomoea (Convolvulaceae), Kadry Abdel Khalik
Systematic Implications Of Seed Coat Diversity In Some Representatives Of The Genus Ipomoea (Convolvulaceae), Kadry Abdel Khalik
Turkish Journal of Botany
Seed coat morphology of 15 species of Ipomoea L. was examined comparatively using scanning and light microscopy methods in order to evaluate their diagnostic value for systematic studies. Macro- and micromorphological characters, including seed shape, colour, size, seed surface, epidermal cell shape, anticlinal boundaries, and periclinal cell wall are presented. Descriptions of seed size, shape, colour, surface, and seed coat types are summarised for the genus. Taxonomic phylogenetic implications of the seed coat micromorphology are also discussed in comparison with the available gross morphological and molecular data. Results of the seed character analyses offer useful data for evaluating the taxonomy …
Inula Tuzgoluensis (Asteraceae), A New Species From Central Anatolia, Turkey, Meryem Şeker, Özlem Çeti̇n
Inula Tuzgoluensis (Asteraceae), A New Species From Central Anatolia, Turkey, Meryem Şeker, Özlem Çeti̇n
Turkish Journal of Botany
The new species Inula tuzgoluensis M.Öztürk & O.Çetin (Asteraceae) is described from Central Turkey. The species grows on salty marshes, in the Cihanbeyli District of Konya Province. Inula tuzgoluensis, an endemic confined to Central Anatolia, is related to I. aucheriana DC. The new species is distinct from the closely allied I. aucheriana by habitus, indumentums, leaves, flowers, pollen grains, and achenes. Photos of the new species are provided. Special attention is also given to its ecology and conservation status. In addition, pollen characteristics and achene surface features are examined by scanning electron microscopy. Phylogenetic relationships between closely related Inula species …
Ecophysiology Of The Holoparasitic Angiosperm Cistanche Phelypaea (Orobancaceae) In A Coastal Salt Marsh, Gamal Mohammad Fahmy
Ecophysiology Of The Holoparasitic Angiosperm Cistanche Phelypaea (Orobancaceae) In A Coastal Salt Marsh, Gamal Mohammad Fahmy
Turkish Journal of Botany
Cistanche phelypaea (L.) Cout. (Orobancaceae) was found parasitising the roots of the succulent shrublets Arthrocnemum macrostachyum (Moric.) K.Koch (Chenopodiaceae) in a coastal salt marsh in Qatar. Measurements were conducted to identify soil properties, host, and noninfected plants by soil excavations to expose the haustoria of the parasite attached to the host roots. The water potential, osmotic potential, pressure potential, and chemical analyses were determined in parasite, host, and noninfected plants. Crown diameter and dry mass of the host plants were smaller than in the noninfected plants. A gradient of water potential existed between the host root and the underground tuberous …
Floristic Diversity And Vegetation Analysis Of Wadi Al-Noman, Mecca, Saudi Arabia, Kadry Abdel Khalik, Mohamed El-Sheikh, Abeer El-Aidarous
Floristic Diversity And Vegetation Analysis Of Wadi Al-Noman, Mecca, Saudi Arabia, Kadry Abdel Khalik, Mohamed El-Sheikh, Abeer El-Aidarous
Turkish Journal of Botany
Wadi Al-Noman in Mecca is one of the most important wadis. It was included among the most important water sources where the springs and wells of Zobida run and it provides drinking water for the holy places in Mecca and visitors to the Kaaba and Arafat regions. The present study provides an analysis of floristic composition, vegetation types, and structure and species distribution at 20 sites, emphasising the environmental factors that affect species distribution. A total of 126 species representing 39 families of vascular plants are recorded. Fabaceae, Poaceae, and Boraginaceae are the largest families, and therophytes and chamaephytes are …
Refinement Of A Vitrification Protocol For Protocorm-Like Bodies Of Dendrobium Sonia-28, Ranjetta Poobathy, Uma Rani Sinniah, Maziah Mahmood, Sreeramanan Subramaniam
Refinement Of A Vitrification Protocol For Protocorm-Like Bodies Of Dendrobium Sonia-28, Ranjetta Poobathy, Uma Rani Sinniah, Maziah Mahmood, Sreeramanan Subramaniam
Turkish Journal of Botany
The hybrid Dendrobium sonia-28 is an important ornamental orchid in the Malaysian flower industry. However, it faces the risk of producing heterozygous progenies through conventional seed propagation or somaclonal variation. Cryopreservation is a favoured long-term storage method in the preservation and maintenance of orchids with specific desired traits. This paper presents a successful cryopreservation protocol for protocorm-like bodies (PLBs) of Dendrobium sonia-28 through the vitrification technique and the use of ascorbic acid and charcoal. Survival assessments were conducted through growth evaluations and visual and spectrophotometric 2,3,5-triphenyltetrazolium chloride assays. Results of this study, an improvement over the previous protocol applied to …
Effects Of Drought Stress On Quantitative And Qualitative Yield And Antioxidative Activity Of Bunium Persicum, Amir Hossein Saeidnejad, Mohammad Kafi, Hamid Reza Khazaei, Mohammad Pessarakli
Effects Of Drought Stress On Quantitative And Qualitative Yield And Antioxidative Activity Of Bunium Persicum, Amir Hossein Saeidnejad, Mohammad Kafi, Hamid Reza Khazaei, Mohammad Pessarakli
Turkish Journal of Botany
Drought stress is one of the growing concerns in agriculture management around the world. Adopting tolerant plants to drought conditions could be an appropriate approach to this problem. Bunium persicum is one of the most important medicinal plants of Iran and Turkey as well as neighbouring countries and has been forced into endangered plant status due to mismanagement of its wild habitats. An experiment was conducted in order to evaluate drought tolerance of Bunium persicum and the effects of drought on its essential oil qualitative properties. Two separate plans based on randomised complete block design were performed with 4 drought …
Cadmium Detoxification In Populus × Canescens, Huiping Dai, Chanjuan Shan, Gengliang Jia, Chao Lu, Tuxi Yang, Anzhi Wei
Cadmium Detoxification In Populus × Canescens, Huiping Dai, Chanjuan Shan, Gengliang Jia, Chao Lu, Tuxi Yang, Anzhi Wei
Turkish Journal of Botany
Cadmium is one of the most toxic heavy metals and affects all viable cells, even at low concentrations. It is introduced to agricultural soils mainly by phosphate fertilisers and causes many toxic symptoms in cells. Phytochelatins (PCs) are heavy metal-binding peptides that play an important role in sequestration and detoxification of heavy metals in plants. In this study, after a 12-week cultivation, the plants were treated with 5 CdSO47 H_{2}O concentrations of 0 (control), 10, 30, 50, and 70 µM for 28 days. The effects of Cd on growth and on glutathione (GSH) and PC contents were investigated in the …
Contributions To Lichen Diversity Of Turkey From The Sarısu Area (Kocaeli), Gülşah Çobanoğlu, Bi̇rkan Açikgöz, Laurentiu Baloniu
Contributions To Lichen Diversity Of Turkey From The Sarısu Area (Kocaeli), Gülşah Çobanoğlu, Bi̇rkan Açikgöz, Laurentiu Baloniu
Turkish Journal of Botany
A total of 85 lichen taxa from the Sarısu area of the district of Kandıra in Kocaeli Province were listed. Three new records for the biota of Turkey, Coenogonium pineti (Ach.) Lücking & Lumbsch, Lecania cuprea (A.Massal.) Van den Boom & Coppins, and Opegrapha calcarea Turner ex Sm., have been identified within the context of this study along with 81 new taxa for the province of Kocaeli.
Localization And Distribution Of Nickel And Other Elements In In-Vitro Grown Alyssum Corsicum Exhibiting Morphological Changes In Trichomes: Initial Insights Into Molecular Mechanisms Of Nickel Hyperaccumulation, Seni̇ha Selcen Babaoğlu Aydaş, Leyla Açik, Danika Leduc, Nezaket Adigüzel, Şeküre Şebnem Elli̇altioğlu, Zeki̇ye Suludere, Yusuf Kağan Kadioğlu
Localization And Distribution Of Nickel And Other Elements In In-Vitro Grown Alyssum Corsicum Exhibiting Morphological Changes In Trichomes: Initial Insights Into Molecular Mechanisms Of Nickel Hyperaccumulation, Seni̇ha Selcen Babaoğlu Aydaş, Leyla Açik, Danika Leduc, Nezaket Adigüzel, Şeküre Şebnem Elli̇altioğlu, Zeki̇ye Suludere, Yusuf Kağan Kadioğlu
Turkish Journal of Botany
Alyssum corsicum Duby is a candidate plant used for phytomining and phytoremediation studies with its high Ni-accumulating ability of the aboveground tissues. Metal localization and concentration by hyperaccumulator plants and the physiological basis of these phenomena have been of great interest in recent years. A. corsicum seeds were grown at different concentrations of Ni in Murashige and Skoog medium. Multielement concentrations of the plant roots and shoots were determined by polarized energy dispersive X-ray fluorescence. Ni, Ca, Mg, and Fe localization and concentration at the upper and lower leaf surfaces were determined by scanning electron microscopy coupled with the energy-dispersive …
Ranking Of 11 Coastal Halophytes From Salt Marshes In Northwest Turkey According Their Salt Tolerance, Christian Zörb, Ali̇ Sümer, Ali̇ Sungur, Timothy J. Flowers, Hasan Özcan
Ranking Of 11 Coastal Halophytes From Salt Marshes In Northwest Turkey According Their Salt Tolerance, Christian Zörb, Ali̇ Sümer, Ali̇ Sungur, Timothy J. Flowers, Hasan Özcan
Turkish Journal of Botany
Salt-affected soils with high electrolyte contents limit the development of the majority of plants and serve as a habitat only for such species (halophytes) that can survive the conditions. To date, there is still much that is unknown about the physiological mechanisms, including ion relationships, that make plants salt-resistant. The primary aim of this study was to evaluate a method of ranking plants for their salt tolerance. A total of 11 coastal halophytes of the Kavak Delta were evaluated for their ability to cope with different soil salinities. For this, electrical conductivities of soils (of up to 135 dS m^{-1}) …
Callogenesis And Production Of Anthocyanin And Chlorophyll In Callus Cultures Of Vegetative And Floral Explants In Rosa Gallica And Rosa Hybrida (Rosaceae), Roshanak Tarrahi, Farkhondeh Rezanejad
Callogenesis And Production Of Anthocyanin And Chlorophyll In Callus Cultures Of Vegetative And Floral Explants In Rosa Gallica And Rosa Hybrida (Rosaceae), Roshanak Tarrahi, Farkhondeh Rezanejad
Turkish Journal of Botany
Callogenesis using vegetative (leaf, stem, petiole) and floral (petal, pistil, anther) explants of Rosa gallica and R. hybrida was investigated using different combinations of 2,4-dichlorophenoxyacetic acid, 6-benzylaminopurine, and gibberellic acid on modified Murashige and Skoog medium. The highest callogenesis was obtained on Murashige and Skoog medium containing ratios of 2 and 3 mg L^{-1} of 2,4-dichlorophenoxyacetic acid to 1 mg L^{-1} of 6-benzylamino purine in both species depending on type of explant. Stem explants in R. gallica initiated callus after 4 days while the other explants in R. gallica and all explants in R. hybrida showed the greatest percentage of …
Agrophysiological And Biochemical Properties Associated With Adaptation Of Medicago Sativa Populations To Water Deficit, Mohamed Farissi, Abdelaziz Bouizgaren, Mustapha Faghire, Adnane Bargaz, Cherki Ghoulam
Agrophysiological And Biochemical Properties Associated With Adaptation Of Medicago Sativa Populations To Water Deficit, Mohamed Farissi, Abdelaziz Bouizgaren, Mustapha Faghire, Adnane Bargaz, Cherki Ghoulam
Turkish Journal of Botany
The effect of water deficit on growth and some physiological and biochemical parameters related to water deficit tolerance was studied in 4 Moroccan alfalfa Medicago sativa L. populations that originated from the mountains and oases of Morocco. The experiment was conducted in greenhouse conditions. Seeds were allowed to germinate in pots filled with sand and peat at a 2:1 ratio, respectively. After 1 month of sowing, the plants were subjected to 3 water regimes: optimal irrigation (75% of field capacity, FC), moderate water deficit (50% FC), and severe water deficit (25% FC). At 45 days of stress, the plants were …
Fabrication Of Layer-By-Layer Deposited Films Containing Carbon Nanotubes And Poly(Malachite Green) As A Sensor For Simultaneous Determination Of Ascorbic Acid, Epinephrine, And Uric Acid, Jahan Bakhsh Raoof, Reza Ojani, Mehdi Baghayeri
Fabrication Of Layer-By-Layer Deposited Films Containing Carbon Nanotubes And Poly(Malachite Green) As A Sensor For Simultaneous Determination Of Ascorbic Acid, Epinephrine, And Uric Acid, Jahan Bakhsh Raoof, Reza Ojani, Mehdi Baghayeri
Turkish Journal of Chemistry
A simple approach to constructing a double-layer voltammetric sensor is described. The poly(malachite green) (PMG) and multiwalled carbon nanotubes (MWCNTs) were coimmobilized at the surface of the glassy carbon electrode (GCE) for fabrication of PMG/MWCNT/GCE. The modified electrode was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), differential pulse voltammetry (DPV), and chronoamperometric techniques. Using DPV, the obtained catalytic peak current was linearly dependent on the ascorbic acid (AA), epinephrine (EP), and uric acid (UA) concentrations in the ranges of 0.4-100.0, 0.1-100.0, and 0.3-90.0 \muM, respectively. The resultant detection limits for AA, EP, and UA were 0.23, 0.0820, and …
New Secondary Metabolites From Croton Sparsiflorus Morong, Rashad Mehmood, Amna Bibi, Abdul Malik
New Secondary Metabolites From Croton Sparsiflorus Morong, Rashad Mehmood, Amna Bibi, Abdul Malik
Turkish Journal of Chemistry
Sparsifloamide (1), a new sphingolipid, and sparsifloside (2), a new diglyceride galactoside, have been isolated from the ethyl acetate soluble fraction of the 80% ethanolic extract of the whole plant of Croton sparsiflorus Morong. Their structures were assigned by ^1H- and ^{13}C-NMR spectra and DEPT, COSY, NOESY, HMQC, HMBC, and ESI-MS experiments.
Molecular Docking And Qsar Study On Imidazole Derivatives As 14 /Alpha -Demethylase Inhibitors, Asghar Davood, Maryam Iman
Molecular Docking And Qsar Study On Imidazole Derivatives As 14 /Alpha -Demethylase Inhibitors, Asghar Davood, Maryam Iman
Turkish Journal of Chemistry
14\alpha-Demethylase (CYP51) inhibitors have been widely used in the treatment of fungal infections. In this study, a series of imidazole derivatives with CYP51 inhibitory activity were subjected to a molecular docking study followed by quantitative structure-activity relationship (QSAR) analyses in search of the ideal physicochemical characteristics of potential CYP51 inhibitors. Desired imidazoles were built using the HyperChem program, and conformational studies were performed through a semiempirical method followed by the PM3 method. Docking study was performed using the AutoDock program on all of the compounds. Different QSAR descriptors were calculated using DRAGON, AutoDock, and HyperChem. Multilinear regression was used as …
Enaminonitriles In Heterocyclic Synthesis: Synthesis And Biological Evaluation Of Novel Indeno[2,1-B]Thiophene Derivatives, Ahmed A. Fadda, Abd El Galil M. Khalil, Eman H. Tawfik
Enaminonitriles In Heterocyclic Synthesis: Synthesis And Biological Evaluation Of Novel Indeno[2,1-B]Thiophene Derivatives, Ahmed A. Fadda, Abd El Galil M. Khalil, Eman H. Tawfik
Turkish Journal of Chemistry
No abstract provided.
Synthesis And Evaluation Of Acetylcholineesterase Inhibitory Potential And Antioxidant Activity Of Benzothiazine Derivatives, Durre Shahwar, Uzma Sana, Naeem Ahmad
Synthesis And Evaluation Of Acetylcholineesterase Inhibitory Potential And Antioxidant Activity Of Benzothiazine Derivatives, Durre Shahwar, Uzma Sana, Naeem Ahmad
Turkish Journal of Chemistry
The aim of the present study was to synthesize and characterize benzothiazine derivatives prepared by using 2-aminothiophenol and saccharine and in vitro screen their enzyme inhibition and antioxidant potential. Nine different derivatives were prepared and their structures were confirmed by spectral studies (EIMS, ^1 H and ^{13}C NMR). Enzyme inhibition potential of the synthesized compounds was evaluated by Ellman's method, while antioxidant activity was determined by DPPH and FRAP assays. All the derivatives showed remarkable activity against acetylcholine esterase with IC_{50} values in the range of 35.9--122.0 \mu M. All other derivatives, except compound 4a, were inactive towards DPPH radical. …
C_2-Symmetric Chiral Diamine Ligands For Enantiomeric Recognition Of Amino Acid Esters And Mandelic Acid By Proton Nmr Titration Method, Hayri̇ye Aral, Tarik Aral, Mehmet Çolak, Berri̇n Zi̇yadanoğullari, Recep Zi̇yadanoğullari
C_2-Symmetric Chiral Diamine Ligands For Enantiomeric Recognition Of Amino Acid Esters And Mandelic Acid By Proton Nmr Titration Method, Hayri̇ye Aral, Tarik Aral, Mehmet Çolak, Berri̇n Zi̇yadanoğullari, Recep Zi̇yadanoğullari
Turkish Journal of Chemistry
Two novel C_2-symmetric chiral diamines containing \alpha -phenylethyl and \alpha -(1-naphthyl)ethyl chiral subunits were prepared with quantitative yields. Enantiomeric recognition properties of these simple structured diamine ligands towards D- and L-amino acid esters and D- and L-mandelic acid were examined by the ^1H NMR titration method. These ligands exhibited strong complexation (with K_f up to 2481 M^{-1}) and good enantioselectivity (up to K_L/K_D = 4.08) towards the mandelic acid enantiomers. The results show that simple structured and easily accessible acyclic C_2-symmetrical compounds can also be used for enantiomeric recognition of racemic amino acids and mandelic acid in addition to complex …