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Karyomorphological Study Of Eight Centaurea L. Taxa (Asteraceae) From Turkey, Esra Marti̇n, Muhi̇tti̇n Di̇nç, Ahmet Duran
Karyomorphological Study Of Eight Centaurea L. Taxa (Asteraceae) From Turkey, Esra Marti̇n, Muhi̇tti̇n Di̇nç, Ahmet Duran
Turkish Journal of Botany
Centaurea L. (Asteraceae) is one of the largest genera in Turkey. The chromosome number and morphology of 8 taxa belonging to the genus Centaurea were investigated using an image analysis system. Among these taxa, the chromosome numbers were as follows: 2n = 18 in C. cariensis Boiss. subsp. niveotomentosa (Hub.-Mor.) Wagenitz, C. lycaonica Boiss. & Heldr., C. virgata Lam., and C. polyclada DC.; 2n = 24 in C. cyanus L.; 2n = 36 in C. virgata and C. cariensis Boiss. subsp. cariensis: 2n = 40 in C. urvillei DC. subsp. urvillei; 2n = 54 in C. tuzgoluensis Aytaç & H.Duman. …
Diversity Of Endophytic Fungi From Various Aegean And Mediterranean Orchids (Saleps), Yüksel Gezgi̇n, Rengi̇n Eltem
Diversity Of Endophytic Fungi From Various Aegean And Mediterranean Orchids (Saleps), Yüksel Gezgi̇n, Rengi̇n Eltem
Turkish Journal of Botany
The diversity and host specificity of endophytic and Rhizoctonia-like fungi were investigated in orchids from the Aegean and Mediterranean regions. Endophytic fungi from various Aegean and Mediterranean orchids (Anacamptis pyramidalis (L.) L.C.M.Richard, Orchis sancta L., Ophrys fusca Link., and Serapias vomeracea subsp. orientalis Greuter) were isolated and identified partially. Surface sterilisation of roots and tubers was carried out in laminar airflow under aseptic conditions. Several modified methods for the isolation of symbiotic fungi from orchid roots and tubers were used. Most of the orchid endophytes isolated was found to be Fusarium Link ex Fr. spp. A total of 47 isolates, …
Isolated Fungal Sinusitis Of The Sphenoid Sinus, Ayşe İri̇z, Muharrem Dağli, Hali̇t Akmansu, Özge Han, Bengi̇ Arslan, Adi̇l Eryilmaz
Isolated Fungal Sinusitis Of The Sphenoid Sinus, Ayşe İri̇z, Muharrem Dağli, Hali̇t Akmansu, Özge Han, Bengi̇ Arslan, Adi̇l Eryilmaz
Turkish Journal of Medical Sciences
Isolated fungal sphenoid sinusitis is a rare entity. Fungal sinusitis is mostly seen in immunocompromised patients and is characterized by invasive progression. We describe a immunologically competent patient with isolated aspergillosis in her sphenoid sinus.
The Relationship Of Serum Cea And Ca 19-9 Levels To Liver Metastasis And Pancreatic Invasion In Esophageal Cancer, Ati̇la Türkyilmaz, Ati̇lla Eroğlu, Yener Aydin, Nuretti̇n Karaoğlanoğlu
The Relationship Of Serum Cea And Ca 19-9 Levels To Liver Metastasis And Pancreatic Invasion In Esophageal Cancer, Ati̇la Türkyilmaz, Ati̇lla Eroğlu, Yener Aydin, Nuretti̇n Karaoğlanoğlu
Turkish Journal of Medical Sciences
Aim: Previous studies have examined levels of CEA and CA 19-9 in esophageal cancer patients, but have not determined a significant relationship between CEA and CA 19-9 levels and liver metastasis and pancreatic invasion in patients with esophageal cancer. In this study, we compared the serum levels of CEA and CA 19-9 in patients with esophageal cancer with and without liver and pancreatic metastasis. Materials and methods: The serum levels of CEA and CA 19-9 were measured in clinic patients between January 2007 and January 2008, including 10 patients with liver metastasis (4) and pancreas invasion (6), and 40 patients …
Alteration Mineralogy And Geochemistry Of The Hydrothermally Altered Rocks Of The Kutlular (Sürmene) Massive Sulfide Deposit, Ne Turkey, Emel Abdi̇oğlu, Mehmet Arslan
Alteration Mineralogy And Geochemistry Of The Hydrothermally Altered Rocks Of The Kutlular (Sürmene) Massive Sulfide Deposit, Ne Turkey, Emel Abdi̇oğlu, Mehmet Arslan
Turkish Journal of Earth Sciences
Volcanogenic massive sulfide deposits accompanying the Upper Cretaceous felsic rocks in the intra-arc rift zone of the Pontide palaeo-arc are common in the NE Turkey. One of them, the Kutlular (Sürmene, Trabzon) deposit, is an abandoned mine within the Upper Cretaceous mafic, felsic volcanics and subvolcanic rocks. Detailed mineralogical and geochemical studies indicate the presence of hydrothermal alteration zones around the Kutlular deposit; these alteration zones are represented by silicification-pyrite-illite zone, illite-silicification zone, illite/smectite-silicification zone, smectite zone accompanying kaolinite and halloysite in the dacitic pyroclastics, and additionally chlorite zone in the mafic volcanics. Lithogeochemical data indicate that the footwall dacitic …
Lead And Sulfur Isotope Studies Of The Koru (Çanakkale, Turkey) Lead-Zinc Deposits, Gülcan Bozkaya, Ahmet Gökçe
Lead And Sulfur Isotope Studies Of The Koru (Çanakkale, Turkey) Lead-Zinc Deposits, Gülcan Bozkaya, Ahmet Gökçe
Turkish Journal of Earth Sciences
Koru (Çanakkale) barite-bearing lead-zinc deposits are typical examples of the lead-zinc deposits occurring in the Tertiary volcanic rocks which crop out in the Biga Peninsula. Volcanic rocks around the investigated deposits are distinguished as Eocene Akçaalan andesite, Oligocene Adadağı pyroclastics, Miocene Dededağ dacite and Plio-Quaternary Karaömerler basalt. The investigated deposits are hosted by Adadağı pyroclastics and show two different mineralization styles such as stockwork ore veinlets in the upper parts and ore veins along the fault zones in WNW-ESE direction, in the lower parts. Sphalerite, galena, pyrite, chalcopyrite, quartz, barite and calcite are the main minerals and they are accompanied …
^{207}Pb-^{206}Pb, ^{40}Ar-^{39}Ar And Apatite Fission-Track Geothermochronology Revealing The Emplacement, Cooling And Exhumation History Of The Karaçayır Syenite (N Sivas), East-Central Anatolia, Turkey, Durmuş Boztuğ, Esra Türksever, Matt Heizler, Raymond J. Jonckheer, Marion Tichomirowa
^{207}Pb-^{206}Pb, ^{40}Ar-^{39}Ar And Apatite Fission-Track Geothermochronology Revealing The Emplacement, Cooling And Exhumation History Of The Karaçayır Syenite (N Sivas), East-Central Anatolia, Turkey, Durmuş Boztuğ, Esra Türksever, Matt Heizler, Raymond J. Jonckheer, Marion Tichomirowa
Turkish Journal of Earth Sciences
The Karaçayır syenite, intruding the Palaeozoic crustal metamorphics and unconformably overlain by Upper Paleocene to Eocene Tokuş formation in the north of Sivas (east-central Anatolia), has been studied with respect to ^{207}Pb-^{206}Pb single zircon evaporation, biotite ^{40}Ar-^{39}Ar, and apatite fission-track geothermochronology. ^{207}Pb-^{206}Pb single zircon evaporation dating yields an age of 99.0±11.0 Ma (Cenomanian-Turonian) which is considered to be the intrusion age. Biotite ^{40}Ar-^{39}Ar age determination gives a cooling age of ca. 65 Ma. Apatite fission-track dating, combined with T-t modeling based on track-length distribution data, determines a fast tectonic exhumation with an uplift rate of > 1 mm/a which occurred 58-61 …
Mineral Chemistry And Petrochemistry Of Post-Collisional Tertiary Mafic To Felsic Cogenetic Volcanics In The Ulubey (Ordu) Area, Eastern Pontides, Ne Turkey, İrfan Temi̇zel, Mehmet Arslan
Mineral Chemistry And Petrochemistry Of Post-Collisional Tertiary Mafic To Felsic Cogenetic Volcanics In The Ulubey (Ordu) Area, Eastern Pontides, Ne Turkey, İrfan Temi̇zel, Mehmet Arslan
Turkish Journal of Earth Sciences
Post-collisional Tertiary volcanic rocks in the Ulubey (Ordu) area at the western edge of the eastern Pontides palaeo-arc are divided into four suites. The Yenisayaca basalt (TB) contains plagioclase (An_{61-83}), clinopyroxene (Wo_{42-44}En_{39-41}Fs_{15-18}) and olivine phenocrysts and titanomagnetite microphenocrysts, whereas the Çatal Tepe and Elekçioğlu Tepe suite (ÇES), Işık Tepe suite (ITS) and andesite/ trachyandesite suite (ATS) rocks include plagioclase (An_{23-78}), clinopyroxene (Wo_{27-48}En_{37-55}Fs_{11-26}), hornblende (Mg#= 0.63-0.76), biotite (Mg#= 0.63-0.82), sanidine phenocrysts and titanomagnetite and apatite microphenocrysts. Petrochemically, the volcanic rocks show tholeiitic-alkaline to the calc-alkaline affinities, and have medium to high-K contents. Most samples have low Mg#, Cr, and Ni, which …
Geochemical Characteristics Of Mafic And Intermediate Volcanic Rocks From The Hasandağ And Erciyes Volcanoes (Central Anatolia, Turkey), Aykut Güçteki̇n, Nezi̇hi̇ Köprübaşi
Geochemical Characteristics Of Mafic And Intermediate Volcanic Rocks From The Hasandağ And Erciyes Volcanoes (Central Anatolia, Turkey), Aykut Güçteki̇n, Nezi̇hi̇ Köprübaşi
Turkish Journal of Earth Sciences
Hasandağ and Erciyes stratovolcanoes, which are the two important stratovolcanoes in Central Anatolia, erupted volcanic products with both calc-alkaline and alkaline compositions, although the calc-alkaline activity is more widespread. There are three stages of geochemical evolution in the history of the Hasandağ stratovolcanic complex: (1) Keçikalesi tholeiitic volcanism, (2) Hasandağ calc-alkaline volcanism, and (3) Hasandağ alkaline volcanism. The geochemical evolution of Erciyes volcanic complex also exhibits three distinct evolutionary stages: (1) Koçdağ alkaline volcanism, (2) Koçdağ calc-alkaline volcanism and (3) Erciyes calc-alkaline volcanism. The volcanic rocks from both suites show enrichments in LREE relative to HREE. The rocks as a …
Compositional Variations, Zoning Types And Petrogenetic Implications Of Low-Pressure Clinopyroxenes In The Neogene Alkaline Volcanic Rocks Of Northeastern Turkey, Faruk Aydi̇n, Orhan Karsli, M. Burhan Sadiklar
Compositional Variations, Zoning Types And Petrogenetic Implications Of Low-Pressure Clinopyroxenes In The Neogene Alkaline Volcanic Rocks Of Northeastern Turkey, Faruk Aydi̇n, Orhan Karsli, M. Burhan Sadiklar
Turkish Journal of Earth Sciences
Clinopyroxene phenocrysts and microphenocrysts in different series of the Neogene alkaline volcanic rocks from the eastern Pontides (NE Turkey) record various stages in the crystallization conditions and evolution history of the alkaline melt as well as its origin. Crystal chemical studies reveal that the clinopyroxenes in each rock series show strong textural and compositional similarities, which all reflect a common petrogenetic affinity. They have relatively high Mg-numbers (0.68-0.95), variable Al_2O_3 (1.3-9.6 wt%), low TiO_2 (
Petrogenesis Of The Refahiye Ophiolite And Its Tectonic Significance For Neotethyan Ophiolites Along The İzmir-Ankara-Erzincan Suture Zone, Ender Sarifakioğlu, Hayretti̇n Özen, John A. Winchester
Petrogenesis Of The Refahiye Ophiolite And Its Tectonic Significance For Neotethyan Ophiolites Along The İzmir-Ankara-Erzincan Suture Zone, Ender Sarifakioğlu, Hayretti̇n Özen, John A. Winchester
Turkish Journal of Earth Sciences
The Refahiye ophiolite, situated near Erzincan in the eastern part of the İzmir-Ankara-Erzincan Suture Zone (İAESZ), is one of the best exposures of oceanic lithosphere in the northern branch of the Neotethyan Ocean. The ophiolite, mainly thrust southwards, transported on an ophiolitic mélange, over the Early Triassic-Campanian Munzur Limestone of the Anatolide-Tauride Platform, was also emplaced by north-directed backthrusting onto the Pontides in the Late Cretaceous. It displays an almost complete ophiolite series unconformably overlain by Tertiary volcano-sedimentary units. The mantle peridotites are dominated by harzburgites, with dunite bands and lenses locally cut by isolated diabase dykes, whereas the mafic-ultramafic …
The Relationship Between The Tectonic Setting Of The Lake İznik Basin And The Middle Strand Of The North Anatolian Fault, Kurultay Öztürk, Cenk Yaltirak, Bedri̇ Alpar
The Relationship Between The Tectonic Setting Of The Lake İznik Basin And The Middle Strand Of The North Anatolian Fault, Kurultay Öztürk, Cenk Yaltirak, Bedri̇ Alpar
Turkish Journal of Earth Sciences
The İznik Basin is an active depression created by a series of faults developed in relation to the Middle Strand of the North Anatolian Fault (NAFMS). The most important of these faults is the oblique Sölöz fault, which runs parallel to the NAFMS. It is interpreted as a releasing bend, and plays a crucial role in the evolution of the 75-m-deep ellipsoid-shaped depression in the southern part of the lake. The faults that limit the coastal alluvial plain on land, some of which developed during the early evolution of the NAFMS, are equally important in the development of the İznik …
Two-And-Three-Dimensional Crustal Thickness Of The Eastern Pontides (Ne Turkey), Nafiz Maden, Kenan Geli̇şli̇, Yener Eyüboğlu, Osman Bektaş
Two-And-Three-Dimensional Crustal Thickness Of The Eastern Pontides (Ne Turkey), Nafiz Maden, Kenan Geli̇şli̇, Yener Eyüboğlu, Osman Bektaş
Turkish Journal of Earth Sciences
The Eastern Pontide orogenic belt is divided into three subzones (northern, southern and axial zones) based on present lithologies and facies associations. NE-SW-, NW-SE- and E-W-trending fault systems, which play an important role in palaeotectonics and neotectonics of the Eastern Pontides, separate these zones. Three different methods were used to estimate the Moho depth from observed gravity value, namely (i) empirical relationship between Moho depth and Bouguer anomaly; (ii) spectral analysis of the radial wave number and; (iii) by the gravity inversion method. Power spectrum, a statistical approach, is a widely used technique to determine the depth of geological sources …
Anomalous Strong Reflections On High Resolution Seismic Data From The Turkish Shelf Of The Eastern Black Sea: Possible Indicators Of Shallow Hydrogen Sulphide-Rich Gas Hydrate Layers, Derman Dondurur, Günay Çi̇fçi̇
Anomalous Strong Reflections On High Resolution Seismic Data From The Turkish Shelf Of The Eastern Black Sea: Possible Indicators Of Shallow Hydrogen Sulphide-Rich Gas Hydrate Layers, Derman Dondurur, Günay Çi̇fçi̇
Turkish Journal of Earth Sciences
Some strong reflections about 3 to 5 m thick were observed at depths of 25-60 metres below the sea floor using deep-towed, 5 kHz subbottom profiler data in the Turkish shelf and upper slope of the Eastern Black Sea at water depths of 250 to 700 m. Strong reflections of this kind are generally attributed to shallow and localized gas accumulations. We, however, observed that the reflection polarity of these strong reflections was positive, suggesting that they do not correspond to reflections from the upper boundary of a possible gas front. In this study, we evaluate these reflections to determine …
Benthonic Foraminiferal Biostratigraphy Of The Upper Cretaceous (Middle Cenomanian−Coniacian) Sequences Of The Bey Dağları Carbonate Platform, Western Taurides, Turkey, Bi̇lal Sari, Kemal Tasli, Saci̇t Özer
Benthonic Foraminiferal Biostratigraphy Of The Upper Cretaceous (Middle Cenomanian−Coniacian) Sequences Of The Bey Dağları Carbonate Platform, Western Taurides, Turkey, Bi̇lal Sari, Kemal Tasli, Saci̇t Özer
Turkish Journal of Earth Sciences
Identification of the benthonic foraminiferal assemblages from ten stratigraphic sections from the inner platform limestones of the Middle Cenomanian−Coniacian successions of the Bey Dağları carbonate platform (BDCP) allowed the recognition of one biozone and two subzones. The lower part of the platform limestones (Middle−Upper Cenomanian) is represented by relatively rich benthonic foraminiferal assemblages, while the upper part (Turonian−Coniacian) contains poor assemblages. The benthonic foraminiferal assemblages determined in the BDCP are dominated by long-ranging species. The shorter-ranging, stratigraphical index species have been selected to date the Upper Cretaceous platform limestones of the BDCP based on the distributions of the species in …
Ophiolite-Hosted Copper And Gold Deposits Of Southeastern Turkey: Formation And Relationship With Seafloor Hydrothermal Processes, Ömer Tezcan Akinci
Ophiolite-Hosted Copper And Gold Deposits Of Southeastern Turkey: Formation And Relationship With Seafloor Hydrothermal Processes, Ömer Tezcan Akinci
Turkish Journal of Earth Sciences
The paper documents evidence about the physical and chemical controls on the behaviour of Au and Cu sulphide deposits in fossil seafloor hydrothermal systems of SE Turkey. Observations from actively forming sulphides at mid-ocean ridges (MOR) and in back-arc environments are compared briefly with ancient analogues of gold and pyritic copper deposits such as Kisecik, Ergani and Siirt-Madenköy, formed at mid-oceanic ridges, or possibly at seamounts and back-arc settings. Many ophiolite-hosted Au- and Cu-deposits, of various sizes, are known to exist along the Bitlis-Zagros Suture Zone (BZS), the boundary between Anatolian and Arabian plates in SE Turkey. These deposits are …
Contemporaneous Late Cretaceous Calc-Alkaline And Alkaline Magmatism In Central Anatolia, Turkey: O Isotope Constraints On Petrogenesis, Nurdane İlbeyli̇, Julian A. Pearce, Ian G. Meighan, Anthony E. Fallick
Contemporaneous Late Cretaceous Calc-Alkaline And Alkaline Magmatism In Central Anatolia, Turkey: O Isotope Constraints On Petrogenesis, Nurdane İlbeyli̇, Julian A. Pearce, Ian G. Meighan, Anthony E. Fallick
Turkish Journal of Earth Sciences
A wide variety of rock types were produced by the latest Cretaceous magmatism in the Central Anatolian Crystalline Complex. These rocks can be divided into three distinct units: (i) calc-alkaline, (ii) subalkaline/transitional, and (iii) alkaline. The calc-alkaline rocks are mainly metaluminous (I-type) ranging from monzodiorite to granite. The subalkaline/transitional rocks are also metaluminous (I-type) ranging from monzonite to granite. The alkaline rocks are mainly peralkaline (A-type), ranging from feldspathoid-bearing monzosyenite to granite. Whole-rock oxygen isotope data from the complex have a considerable range of \delta18O values between 6.5 per thousand and 14.8 per thousand. Initial 87Sr/86Sr versus 143Nd/144Nd ratios, and …
U-Pb Zircon Shrimp Ages, Geochemical And Sr-Nd Isotopic Compositions Of The Early Cretaceous I-Type Sarıosman Pluton, Eastern Pontides, Ne Turkey, Abdullah Kaygusuz, Bin Chen, Zafer Aslan, Wolfgang Siebel, Cüneyt Şen
U-Pb Zircon Shrimp Ages, Geochemical And Sr-Nd Isotopic Compositions Of The Early Cretaceous I-Type Sarıosman Pluton, Eastern Pontides, Ne Turkey, Abdullah Kaygusuz, Bin Chen, Zafer Aslan, Wolfgang Siebel, Cüneyt Şen
Turkish Journal of Earth Sciences
The petrogenesis and U-Pb SHRIMP zircon ages of the Late Cretaceous Sarıosman pluton in the Eastern Pontides is investigated by means of whole-rock Sr-Nd isotope data with field, petrographic and whole-rock geochemical studies. The bulk of the I-type Sarıosman pluton consists of biotite-hornblende monzogranite, with minor quantities of porphyritic hornblende-biotite monzogranite. The biotite-hornblende monzogranite contains a number of mafic microgranular enclaves (MMEs) of quartz monzodiorite composition. U-Pb zircon sensitive high-resolution ion microprobe dating (SHRIMP) dates the magma emplacement age of the biotite-hornblende monzogranite at 82.7±1.5 Ma. The rocks of the pluton show high-K calc-alkaline, metaluminous to slightly peraluminous characteristics, and …
Subduction-Related Eocene Shoshonites From The Cenozoic Urumieh-Dokhrat Magmatic Arc (Qaleh-Khargooshi Area, West Of The Yazd Province, Iran), Ghodrat Torabi
Subduction-Related Eocene Shoshonites From The Cenozoic Urumieh-Dokhrat Magmatic Arc (Qaleh-Khargooshi Area, West Of The Yazd Province, Iran), Ghodrat Torabi
Turkish Journal of Earth Sciences
The fifth phase of Eocene volcanism in the central part of the Urumieh-Dokhtar magmatic arc (UDMA), comprises lavas with shoshonitic characteristics, ranging from trachybasalt to trachydacite. In shoshonites of the Qaleh-Khargooshi area, leucite changes to analcime, analcime to albite, sanidine to albite and anorthoclase, and clinopyroxene to albite. These reactions, together with other field, petrographic and geochemical features, are evidence of an original absarokitic magma which was changing to generate the different rock units. The parental magma of these shoshonites was produced by a low degree of partial melting from a metasomatized enriched mantle source. During the ascent of shoshonitic …
Coxiella Burnetii Seroprevalence In The Rural Part Of Bolu, Turkey*, Oğuz Karabay, Esra Koçoğlu, Gökhan Baysoy, Selami̇ Konyalioğlu
Coxiella Burnetii Seroprevalence In The Rural Part Of Bolu, Turkey*, Oğuz Karabay, Esra Koçoğlu, Gökhan Baysoy, Selami̇ Konyalioğlu
Turkish Journal of Medical Sciences
Aim: This study was performed to determine the seroprevalence of Coxiella burnetii in the rural part of Bolu, a city located in the western part of the Black Sea region of Turkey. Materials and Methods: The study population was chosen by cluster sampling to represent the rural population of the city. Serum samples were collected from the 9 rural districts of Bolu. Blood samples were taken to the laboratory while stored at 4 °C in ice-cooled boxes. The sera were then stored at -20 °C until testing. The presence of IgG antibodies against C. burnetii phase-II antigens in the sera …
Conservation Biology Of Asperula Daphneola (Rubiaceae) In Western Turkey, Sali̇h Gücel, Özcan Seçmen
Conservation Biology Of Asperula Daphneola (Rubiaceae) In Western Turkey, Sali̇h Gücel, Özcan Seçmen
Turkish Journal of Botany
A. daphneola O.Schwarz (Rubiaceae) was originally recorded from a single location on Nif Mountain (Kemalpaşa) in western Turkey. This study was carried out from 2001 to 2004 to investigate the causes of this endemic species^{'} restricted distribution. To that end, the environmental conditions and reproductive biology of the species were studied. As a result of field investigations, 4 additional locations were identified. These 5 localities (the peak of Nif Mountain, Alaca Mountain, Ayrıca Mountain, Bölme Hill, and another locality west of Nif Mountain) encompass an area of 2.5 km^2. The total number of individuals in these localities was estimated to …
Notes On The Sikkim Himalayan Rhododendrons: A Taxa Of Great Conservation Importance, Kaushal K. Singh
Notes On The Sikkim Himalayan Rhododendrons: A Taxa Of Great Conservation Importance, Kaushal K. Singh
Turkish Journal of Botany
Rhododendrons form dominating species all along the temperate, subalpine and alpine zones in the Sikkim Himalaya. Rhododendron L. is one of the largest genus of the Ericaceae family, occurring in the higher altitudes having ecological significance and economic importance in addition to its splendiferous flowers. It has aesthetic, sacred, aromatic, medicinal and fuelwood values. There are 36 species with 45 different forms (including subspecies and varieties) in the Sikkim Himalaya. Using IUCN guidelines for categorization eight species are being evaluated according to population characters. It has been observed recently that the rhododendrons of the region are under pressure, which are …
Dynamics Of 2,4-D In Generation Of Cytomorphological Variants In An Important Anticancerous And Antihepatotoxic Herb – Cichorium Intybus L., Zeba Khan, Mohammad Yunus Khalil Ansari, Honey Gupta, Sana Chaudhary
Dynamics Of 2,4-D In Generation Of Cytomorphological Variants In An Important Anticancerous And Antihepatotoxic Herb – Cichorium Intybus L., Zeba Khan, Mohammad Yunus Khalil Ansari, Honey Gupta, Sana Chaudhary
Turkish Journal of Botany
The genotoxic effect of 2,4-D was investigated in chicory (2n = 18). At 100 ppm concentration 4 variants differing in morphological traits were isolated and subjected to chromosomal analysis. Morphological variations in shape, height, and yield parameters were observed. Different cytological anomalies such as univalents, multivalents, bridges, laggards, chromosome stickiness, and polyads occurred in all 4 isolates. However, the frequency of these chromosomal irregularities decreased at anaphase, exhibiting recovery at later stages. Thus the above concentration of growth hormone 2,4-D can be effectively incorporated for raising viable mutants in this medicinally useful herb.
Benthic Faunal Assemblages Of The Holocene Sediments From The Southwest Black Sea Shelf, Demet Ongan, Oya Algan, Sevi̇nç Kapan Yeşi̇lyurt, Ati̇ke Nazi̇k, Mustafa Ergi̇n, Christ Eastoe
Benthic Faunal Assemblages Of The Holocene Sediments From The Southwest Black Sea Shelf, Demet Ongan, Oya Algan, Sevi̇nç Kapan Yeşi̇lyurt, Ati̇ke Nazi̇k, Mustafa Ergi̇n, Christ Eastoe
Turkish Journal of Earth Sciences
Benthic faunal content (benthic foraminifera, mollusca and ostracoda) of sediment cores from the SW Black Sea shelf were examined. Based on the vertical distribution of abundance and diversity of the benthic fauna, three benthic assemblages were distinguished. These assemblages are BF1, BF2 and BF3, and reflect the changes in bottom water from the termination of the Neoeuxinian period to present. BF1 displays high abundance and diversity in the surroundings of the Bosporus channel, diminishing in the shelf sediments further away from the channel. In the Mid-Shelf and Outer Shelf, it displays low abundance and low diversity. BF1 which started to …