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Comparison Of Unmanaged And Managed Trojan Fir-Scots Pine Forests For Structuralcomplexity, Ferhat Kara, John M. Lhotka
Comparison Of Unmanaged And Managed Trojan Fir-Scots Pine Forests For Structuralcomplexity, Ferhat Kara, John M. Lhotka
Turkish Journal of Agriculture and Forestry
Unmanaged forests may exhibit a higher degree of biodiversity compared to managed forests. We examined and compared the stand structure, density, and volume of deadwood components of managed and unmanaged mixed forests of Trojan fir (Abies nordmanniana subsp. equi-trojani [Asch. & Sint. ex Boiss] Coode & Cullen)-Scots pine (Pinus sylvestris L.) in northern Turkey. The single-tree selection method has been employed in the managed forests. Density of large live trees ha-1, density of standing deadwood (SDW) ha-1, and volume of lying deadwood (LDW) (m3 ha-1) were calculated for both treatments (i.e. managed or unmanaged). Results showed that unmanaged forests had …
Astragalus Membranaceus And Punica Granatum Alleviate Infertility And Kidney Dysfunction Induced By Aging In Male Rats, Ameera Alshinnawy, Wael Elsayed, Alshaimaa Taha, Ahmed Sayed, Ahmed Salem
Astragalus Membranaceus And Punica Granatum Alleviate Infertility And Kidney Dysfunction Induced By Aging In Male Rats, Ameera Alshinnawy, Wael Elsayed, Alshaimaa Taha, Ahmed Sayed, Ahmed Salem
Turkish Journal of Biology
By aging, male fertility and kidney function decline. Therefore, the investigation of health span-extending agents becomes more urgent to overcome aging-induced infertility and kidney dysfunction. The current research was undertaken to investigate the antiaging efficacy of Astragalus membranaceus telomerase activator-65 (Ta-65) and pomegranate supplements. Forty male Wistar rats were divided into young rats, aged rats, aged rats treated with Ta-65 (500mg/kg/day), and aged rats treated with pomegranate (250mg/kg/day). Testosterone, FSH, LH, and kidney functions were measured in serum. Sperm analysis as well as testicular histological examination was performed. Aging caused an imbalance in male sex hormones resulting in sperm abnormality …
Two Boron-Containing Compounds Affect The Cellular Viability Of Sh-Sy5y Cells In An In Vitro Amyloid-Beta Toxicity Model, Mehmet Ozansoy, Mehmet Özgen Altintaş, Muzaffer Beyza Ozansoy, Necmeddi̇n Günay, Ertuğrul Kiliç, Ülkan Kiliç
Two Boron-Containing Compounds Affect The Cellular Viability Of Sh-Sy5y Cells In An In Vitro Amyloid-Beta Toxicity Model, Mehmet Ozansoy, Mehmet Özgen Altintaş, Muzaffer Beyza Ozansoy, Necmeddi̇n Günay, Ertuğrul Kiliç, Ülkan Kiliç
Turkish Journal of Biology
Boron is a naturally occurring trace element found in organic and inorganic complexes. Boron-containing compounds are required for living organisms for diverse metabolic functions, including nitrogen fixation in microorganisms, cell wall stability in plants, and bone and carbohydrate metabolism in animals. The number of studies about the effect of boron in biological model systems is very limited; so far, there has been no study on the correlation between boron and amyloid-beta toxicity. Here, we investigated the possible effects of 2 boron-containing compounds-sodium borate decahydrate and boric acid-against amyloid-beta toxicity. In our in vitro amyloid-beta toxicity model, we showed that these …
The Effect Of Nitrogen Applications On The Growth Of Young Olive Trees And Nitrogen Useefficiency, Isabel Ferreira, Margari̇da Arrobas, José Moutinho-Pereira, Carlos M. Correia, Manuel Angelo Rodrigues
The Effect Of Nitrogen Applications On The Growth Of Young Olive Trees And Nitrogen Useefficiency, Isabel Ferreira, Margari̇da Arrobas, José Moutinho-Pereira, Carlos M. Correia, Manuel Angelo Rodrigues
Turkish Journal of Agriculture and Forestry
Two field trials (FieldExp1 and FieldExp2) and a pot experiment (PotExp) were c0onducted over a period of 3 years to assess olive tree response to nitrogen (N) applications and to estimate apparent N recovery. FieldExp1 was installed in a 3-year-old olive grove. FieldExp2 consisted of a plantation of young rooted plants. Two treatments were applied in both experiments: N application and a nonfertilized control. In PotExp, 4 N rates were used. In FieldExp1, olive yield significantly increased with applied N in only 1 of the 3 growing seasons. In FieldExp2, aboveground dry matter yield significantly increased with N application. In …
Evaluation Of Some Melon Lines For Their Resistance Against Melon Aphid,Aphis Gossypii Glover, Musa Kirişik, Mi̇ne Ünlü, Fedai̇ Erler
Evaluation Of Some Melon Lines For Their Resistance Against Melon Aphid,Aphis Gossypii Glover, Musa Kirişik, Mi̇ne Ünlü, Fedai̇ Erler
Turkish Journal of Agriculture and Forestry
The melon aphid, Aphis gossypii Glover (Hemiptera: Aphididae), which has a very wide host range including cucurbit species, causes serious direct and indirect damage to many crops. In both greenhouse and open field melon cultivation in Antalya (in southwestern Turkey), the control of this pest generally depends on the use of chemical insecticides, resulting in a rapid increase in resistance to a wide range of insecticides. In the present study, a total of 23 melon lines (22 indigenous and 1 exotic) belonging to 2 varieties (Cucumis melo var. inodorus and C. melo var. reticulatus) were evaluated for resistance to the …
Expression Pattern Of Olfactory Receptor Genes In Human Cumulus Cells As An Indicator For Competent Oocyte Selection, Neda Daei-Farshbaf, Reza Aflatoonian, Fatemeh-Sadat Amjadi, Sara Taleahmad, Mahnaz Ashrafi, Mehrdad Bakhtiyari
Expression Pattern Of Olfactory Receptor Genes In Human Cumulus Cells As An Indicator For Competent Oocyte Selection, Neda Daei-Farshbaf, Reza Aflatoonian, Fatemeh-Sadat Amjadi, Sara Taleahmad, Mahnaz Ashrafi, Mehrdad Bakhtiyari
Turkish Journal of Biology
Odorant or olfactory receptors are mainly localized in the olfactory epithelium for the perception of different odors. Interestingly, many ectopic olfactory receptors with low expression levels have recently been found in nonolfactory tissues to involve in local functions. Therefore, we investigated the probable role of the olfactory signaling pathway in the surrounding microenvironment of oocyte. This study included 22 women in intracytoplasmic sperm injection cycle. The expression of olfactory target molecules in cumulus cells surrounding the growing and mature oocytes was evaluated by Western blotting and real-time polymerase chain reaction. Additionally, integrated bioinformatics analyses were carried out and 6 ectopic …
Epibrassinolide Activates Akt To Trigger Autophagy With Polyamine Metabolism In Sw480 And Dld-1 Colon Cancer Cell Lines, Kaan Adacan, Pinar Obakan Yerli̇kaya
Epibrassinolide Activates Akt To Trigger Autophagy With Polyamine Metabolism In Sw480 And Dld-1 Colon Cancer Cell Lines, Kaan Adacan, Pinar Obakan Yerli̇kaya
Turkish Journal of Biology
Epibrassinolide (EBR), a plant-derived polyhydroxylated derivative of 5?-cholestane, structurally shows similarities to animal steroid hormones. According to the present study, EBR treatment triggered a significant stress response via activating ER stress, autophagy, and apoptosis in cancer cells. EBR could also increase Akt phosphorylation in vitro. While the activation of Akt resulted in cellular metabolic activation in normal cells to proceed with cell survival, a rapid stress response was induced in cancer cells to reduce survival. Therefore, Akt as a mediator of cellular survival and death decision pathways is a crucial target in cancer cells. In this study, we determined that …
The Inhibitory Effect Of Melatonin On Osteoclastogenesis Of Raw 264.7 Cells In Low Concentrations Of Rankl And Mcsf, Hala Jarrar, Damla Çeti̇n Altindal, Menemşe Gümüşdereli̇oğlu
The Inhibitory Effect Of Melatonin On Osteoclastogenesis Of Raw 264.7 Cells In Low Concentrations Of Rankl And Mcsf, Hala Jarrar, Damla Çeti̇n Altindal, Menemşe Gümüşdereli̇oğlu
Turkish Journal of Biology
RAW 264.7 cells are one of the most recommended cell lines for investigating the activity and differentiation of osteoclasts. These cells differentiate into osteoclasts in the presence of two critical components: receptor activator of nuclear factor kappa B ligand (RANKL) and macrophage colony stimulating factor (MCSF). Melatonin (MEL) hormone has recently become one of the small molecules used in the field of bone regeneration and bone disease treatment, as it has the ability to inhibit the differentiation of osteoclasts directly by suppression of the NF-κB signaling pathway. The main aim of the current study is to determine sufficient RANKL/MCSF concentrations …
Determination Of Some Physicomechanical And Biochemical Parameters Of Hazelnut (Corylus Avellana L.) Cultivars, Necati̇ Çeti̇n, Mehmet Yaman, Kevser Karaman, Bünyami̇n Demi̇r
Determination Of Some Physicomechanical And Biochemical Parameters Of Hazelnut (Corylus Avellana L.) Cultivars, Necati̇ Çeti̇n, Mehmet Yaman, Kevser Karaman, Bünyami̇n Demi̇r
Turkish Journal of Agriculture and Forestry
Hazelnut is one of the most popular nuts consumed by people; it has different cultivars in Turkey. The aim of the current study was to characterize some physicomechanical characteristics, shape features, color, and biochemical properties of 6 standard and 3 local hazelnut cultivars grown in Turkey. The shape and size properties of the samples were determined using image processing techniques as an alternative to conventional measurement methods. Additionally, principal component analysis (PCA) was used to classify the hazelnut samples in terms of the biochemical parameters of the hazelnut cultivars. According to the findings, the highest crude oil (63.25%) and lowest …
Larvicidal Effect Of Achillea Biebersteinii Afan. (Asteraceae) Essential Oil Against Larvaeof Pine Processionary Moth, Thaumetopoea Pityocampa (Denis & Schiffermüller, 1775)(Lepidoptera: Notodontidae), Memi̇ş Kesdek, Şaban Kordali, Ayşe Usanmaz Bozhüyük, Melek Güdek
Larvicidal Effect Of Achillea Biebersteinii Afan. (Asteraceae) Essential Oil Against Larvaeof Pine Processionary Moth, Thaumetopoea Pityocampa (Denis & Schiffermüller, 1775)(Lepidoptera: Notodontidae), Memi̇ş Kesdek, Şaban Kordali, Ayşe Usanmaz Bozhüyük, Melek Güdek
Turkish Journal of Agriculture and Forestry
The pine processionary moth, Taumetopoea pityocampa (Denis & Schiffermüller, 1775) (Lepidoptera: Notodontidae), is an important pest of coniferous trees in the forests of Turkey and throughout the world. In order to control this pest, different methods such as mechanical, biological, and chemical control have been used. However, this pest is still a major problem in Turkey, as well as globally. The study aimed to investigate the larvicidal effect of essential oil obtained from Achillea biebersteinii Afan. (Asteraceae) in different doses (10, 15, and 20 μL Petri-1) over time (12, 24, 36, and 48 h) against T. pityocampa larvae in laboratory …
Isolation And Identification Of Bacillus Pumilus Yhh-2, A Potential Pathogen To Thealfalfa Weevil (Hypera Postica Gyllenhal), Hati̇ce Öğütcü, Yasemi̇n Erbey, Medi̇ne Güllüce, Burak Alaylar, Mehmet Karadayi, Selma Sezen, Mahmut Erbey
Isolation And Identification Of Bacillus Pumilus Yhh-2, A Potential Pathogen To Thealfalfa Weevil (Hypera Postica Gyllenhal), Hati̇ce Öğütcü, Yasemi̇n Erbey, Medi̇ne Güllüce, Burak Alaylar, Mehmet Karadayi, Selma Sezen, Mahmut Erbey
Turkish Journal of Agriculture and Forestry
Alfalfa weevil (Hypera postica Gyllenhal, 1813) samples were collected from different locations in Kırşehir, Turkey, during May-August in 2014. They were immediately transferred to the research laboratory and dissected under aseptic conditions. Then serial dilutions were prepared from digestive tract samples and the spread plate technique was used for obtaining pure cultures. The conventional and molecular methods that include morphological and physiological examinations, biochemical tests, 16S rDNA sequencing, and the basic local alignment search tool (BLAST) were used for identification of the bacterial isolates. According to the findings of the present study, the YHH-2 isolate was found as the main …
Biochemical Content In Fruits Of Peach And Nectarine Cultivars, Mustafa Kenan Geçer
Biochemical Content In Fruits Of Peach And Nectarine Cultivars, Mustafa Kenan Geçer
Turkish Journal of Agriculture and Forestry
In Turkey, there is an increasing interest for peach and nectarine fruits due to their sensory properties and nutritional values. The large diffusion of new peach and nectarine cultivars requires the knowledge of all fruit characteristics in connection with the cultivation area to satisfy market demand. This study seeks to determine fruit quality attributes and nutraceutical values of 7 commercially important peach (Glohaven, Dixired, Cresthaven, Redhaven, Merrill Gem Free, June Gold, and Jefferson) and 4 nectarine cultivars (Nectared4, Gransun, Cherokee, and Royal Glo) grown in Malatya region of Turkey. The fruits were evaluated for their phenolic compounds (protocatechuic, rutin, quercetin, …
Exogenous Cysteine Alleviates Mercury Stress By Promoting Antioxidant Defence In Maize(Zea Mays L.) Seedlings, Ferhunde Aysi̇n, Aykut Karaman, Asli Yilmaz, Özkan Aksakal, Ebru Gezgi̇nci̇oğlu, Sakineh Mohammadi Kohnehshahri
Exogenous Cysteine Alleviates Mercury Stress By Promoting Antioxidant Defence In Maize(Zea Mays L.) Seedlings, Ferhunde Aysi̇n, Aykut Karaman, Asli Yilmaz, Özkan Aksakal, Ebru Gezgi̇nci̇oğlu, Sakineh Mohammadi Kohnehshahri
Turkish Journal of Agriculture and Forestry
Mercury (Hg) is one of the most important environmental pollutants that negatively affects plant growth and development. Cysteine (Cys) plays an important role in plant response to various environmental stress factors. In the present study, the alleviation of Hg stress through exogenous Cys treatment to maize seedlings was evaluated. For this purpose, a hydroponic experiment was set up to investigate the effect of HgCI2 (100 μM) and in combination with Cys (200 μM) on plant growth, total chlorophyll content, reactive oxygen species, antioxidant enzyme activities, and mRNA expression levels of some antioxidant genes in maize seedlings. The results showed that …
Phenotypic Variability Of Autochthonous Walnut (Juglansregia L) Genotypes Innorthwestern Bosnia And Herzegovina, Azra Skender, Mirsad Kurtovic, Pakeza Drkenda, Dinko Becirspahic, Aziz Ebrahimi
Phenotypic Variability Of Autochthonous Walnut (Juglansregia L) Genotypes Innorthwestern Bosnia And Herzegovina, Azra Skender, Mirsad Kurtovic, Pakeza Drkenda, Dinko Becirspahic, Aziz Ebrahimi
Turkish Journal of Agriculture and Forestry
The main objective of this study was to examine the characteristics and the relationship between walnuts in the Una-Sana Canton based on phenotypic properties. This is the first study of preselection of walnut variability in this area. In this study, we evaluated the phenological and morphological characteristics of 75 selected genotypes during 2014 and 2015. Twenty-four phenotypic traits were monitored throughout 2 years on different sites. The results of the PCA analysis showed a very high heterogeneity of walnut seedlings on the examined sites, from the aspect of observed parameters. A limited number of superior genotypes were found, but individual …
Changes In Some Vegetation Properties Of The Rangelands Of The Palandöken Mountains, Erzurum, Over Two Decades, Ali̇ Koç, Mehmet Keri̇m Güllap, Mustafa Sürmen, Hali̇l İbrahi̇m Erkovan
Changes In Some Vegetation Properties Of The Rangelands Of The Palandöken Mountains, Erzurum, Over Two Decades, Ali̇ Koç, Mehmet Keri̇m Güllap, Mustafa Sürmen, Hali̇l İbrahi̇m Erkovan
Turkish Journal of Agriculture and Forestry
Plant community responses to environmental changes depend upon management strategies, climate, topography, and time. The objective herein was to determine canopy coverage and botanical changes in Turkish highland rangelands with different topographical characteristics between 1993 and 2013. Trends in the plant composition changed depending on the slope aspect (compass direction) and topography. The contribution of the grasses to the canopy decreased, while that of legumes and the other families increased. The results indicated that rangeland degradation occurred under uncontrolled grazing conditions. Suitable range management changes are recommended for the conservation of natural resources in the highland rangelands of Turkey.
Sugar Beet Root Rot Caused By Oomycetous Pathogensin Turkeyand Their Control By Seed Treatment, Meltem Avan, Gülsüm Palacioğlu, Tüli̇n Sarigül Ertek, Yakup Zekai̇ Katircioğlu, Harun Bayraktar, Riza Kaya, Sali̇h Maden
Sugar Beet Root Rot Caused By Oomycetous Pathogensin Turkeyand Their Control By Seed Treatment, Meltem Avan, Gülsüm Palacioğlu, Tüli̇n Sarigül Ertek, Yakup Zekai̇ Katircioğlu, Harun Bayraktar, Riza Kaya, Sali̇h Maden
Turkish Journal of Agriculture and Forestry
The aim of this study was to determine the oomycetous pathogens causing root roton sugar beet and test their control by seed treatment in Konya Province, Turkey. Oomycetous fungus-like pathogens of sugar beet were investigated using 866 plant samples collected at 2 growth stages, early seedling and late root, from fields in the Konya region of Turkey and 1 sample from the Thrace region. Herein, 10 oomycetous species belonging to 3 genera:Aphanomyces cochlioides, Phytophthora cryptogea, Ph. pseudocryptogea, Ph. megasperma, Ph. inundata, Pythium aphanidermatum, Py. helicoides, Py. heterothallicum, Py. Sylvaticum, and Py. Ultimum var. ultimum (Globisporangium ultimum var. ultimum) were discovered …
Some Important Physicochemical And Bioactive Characteristics Of The Main Apricot Cultivars From Turkey, Neva Karataş, Memnune Şengül
Some Important Physicochemical And Bioactive Characteristics Of The Main Apricot Cultivars From Turkey, Neva Karataş, Memnune Şengül
Turkish Journal of Agriculture and Forestry
Turkey is one of the world's leading producers in both in fresh and dried apricots, and Malatya Province is the capital for apricots. In the present study, the fruit of 13 apricot cultivars (Adilcevaz, Alkaya, Aprikoz, Çataloğlu, Hacıhaliloğlu, Hasanbey, İsmailağa, Kabaaşı, Mahmuduneriği, Soğancı, Şam, Şekerpare, and Tokaloğlu-Erzincan), grown together at the Apricot Research Institute in Malatya Province, were harvested and evaluated for some important physicochemical and bioactive characteristics. The results showed statistically significant differences in most of the physicochemical and bioactive characteristics. Fresh apricot fruit peel color values, L, a, and b, were determined as between 48.66 and 64.70, 8.12 …
Daily Variations In Stratification In İzmit Bay, Hüsne Altiok, Lalehan Can, Sabri̇ Mutlu
Daily Variations In Stratification In İzmit Bay, Hüsne Altiok, Lalehan Can, Sabri̇ Mutlu
Turkish Journal of Earth Sciences
We studied the diurnal variation of stratification in İzmit Bay with temperature and current velocity, and investigated the influence of atmospheric conditions. In the east of the bay entrance, 10-min temperature and hourly current measurements were made between the dates of 4 February 2015 and 24 April 2015, down to about 40 m depth in the water column. In addition to this, hourly temperature and salinity with depth data were collected between the dates of 4 and 7 February 2015 by a research vessel. The meteorological parameters for the atmospheric conditions were obtained from the closest weather stations (Yalova, Çınarcık, …
Heavy Metal Contamination In Groundwater And Surface Water Due To Active Pb-Zn-Cumine Tails And Water-Rock Interactions: A Case Study From The Küre Mine Area (Turkey), Tülay Ekemen Keski̇n, Emre Özler
Heavy Metal Contamination In Groundwater And Surface Water Due To Active Pb-Zn-Cumine Tails And Water-Rock Interactions: A Case Study From The Küre Mine Area (Turkey), Tülay Ekemen Keski̇n, Emre Özler
Turkish Journal of Earth Sciences
This study aimed at elucidating the groundwater and surface water pollution resulting from water-rock interaction, mine tailings, and mining activities at Küre (Kastamonu) sulfidic Pb-Zn-Cu mine area and its vicinity. The study area has a surface area of approximately 2990 km2. The Küre River drainage site covering the study area is approximately 440 km2. The concentrations of SO4, Al, As, Ba, Mn, Ni, Sb, and Pb in some groundwater (K10, K20, K21, K27, K28, K29, K30), and surface water (KR3) exceed the maximum limit values with respect to the Turkish Standards for Water Intended For Human Consumption and World Health …
New Geosite Candidates From Urla (İzmir, Western Anatolia, Turkey): A List Of Geologicalassets Nested With Antique And Modern Cultural Heritage, Ökmen Sümer, Mehmet Akbulut, Hülya İnaner
New Geosite Candidates From Urla (İzmir, Western Anatolia, Turkey): A List Of Geologicalassets Nested With Antique And Modern Cultural Heritage, Ökmen Sümer, Mehmet Akbulut, Hülya İnaner
Turkish Journal of Earth Sciences
The Urla Basin is an approximately 20 km wide and 30 km long N-S-trending strike-slip basin, located in the westernmost part of the Western Anatolia Extensional Province. Although the basin-fill units are generally composed of sedimentary and volcanic rocks of Miocene to Recent, Triassic and Late Cretaceous-Paleocene sedimentary rocks are also exposed in the middle and western part of the basin. In addition to this geological diversity, the basin hosts many ancient settlements due to its geographical position and close contact with the Aegean Sea. This study mostly focuses on the northern part of the basin with a concentration on …
Changes In Phenolic Profile, Soluble Sugar, Proline, And Antioxidant Enzyme Activities Of Polygonum Equisetiforme In Response To Salinity, Faycal Boughalleb, Raoudha Abdellaoui, Maher Mahmoudi, Esmaeil Bakhshandeh
Changes In Phenolic Profile, Soluble Sugar, Proline, And Antioxidant Enzyme Activities Of Polygonum Equisetiforme In Response To Salinity, Faycal Boughalleb, Raoudha Abdellaoui, Maher Mahmoudi, Esmaeil Bakhshandeh
Turkish Journal of Botany
This study intended to focus on the effect of different levels of NaCl (0?400 mM, at regular intervals every 100 mM) on the growth, secondary metabolites, and antioxidant enzyme activities of Polygonum equisetiforme, a wild plant with medicinal and industrial uses, which often grows in harsh environmental conditions. Our results showed that biomass production significantly decreased with salinity, while the leaf relative water content declined only at high levels of NaCl concentration (300?400 mM). In contrast, these higher doses of salt resulted in a significant increase in malondialdehyde (MDA) content. Both proline and soluble sugar (e.g., fructose, glucose, and sucrose) …
Induction Of Pollen Embryo And Chromosome Doubling In Tobacco (Nicotiana Tabacum L.), Xiaoliang Lu, Hongqi Wu, Qiang Zhang, Wei Sun, Xin Chen, Xiaoting Wu, Yaofeng Chen
Induction Of Pollen Embryo And Chromosome Doubling In Tobacco (Nicotiana Tabacum L.), Xiaoliang Lu, Hongqi Wu, Qiang Zhang, Wei Sun, Xin Chen, Xiaoting Wu, Yaofeng Chen
Turkish Journal of Botany
Another culture is an effective breeding method for improving desirable traits, since it allows fast achievement of genetically homozygous lines. The present studies were carried out to evaluate the response of flue-cured tobacco anthers for high frequency pollen embryo induction in different culture media, and the effects of colchicine treatment on tobacco chromosome doubling. The results showed that different media caused significant changes in pollen embryo induction, in which the most obvious change was found in B medium with induction rates of 23.28%, 26.64%, and 28.07% for TMK-12 × Jiyan 5, K326 × Shangkang 70, and NC71 × Jingyehuang, respectively. …
Russula Shanglaensis Sp. Nov. (Basidiomycota: Russulales), A New Species From The Mixed Coniferous Forests In District Shangla, Pakistan, Sadiq Ullah, Andrew William Wilson, Muhammad Fiaz, Shah Hussain, Gregory M. Mueller, Abdul Nasir Khalid
Russula Shanglaensis Sp. Nov. (Basidiomycota: Russulales), A New Species From The Mixed Coniferous Forests In District Shangla, Pakistan, Sadiq Ullah, Andrew William Wilson, Muhammad Fiaz, Shah Hussain, Gregory M. Mueller, Abdul Nasir Khalid
Turkish Journal of Botany
A new species in the genus Russula from the mixed coniferous forest of District Shangla, Khyber Pakhtunkhwa, Pakistan is described and illustrated. Phylogenetic data derived from DNA sequences of nuclear ribosomal internal transcribed spacer (ITS), along with morphological characterizations, indicate the species is novel.Russula shanglaensis sp. nov. is distinct from other known species in subsect. Virescentinae. It is characterized by the convex to slightly depressed grayish pilei that often reflect rusty brown to light purplish spots, with very lightly striated to tuberculate striated margins. The occurrence of subglobose to ellipsoidal basidiospores (6.5-8 × 6-7 µm) with irregular incomplete reticulation is …
Notes On The Genus Sauvetrea (Orchidaceae, Maxillariinae), With A Description Of A New Species, Dariusz L. Szlachetko, Natalia Oledrzynska, Monika M. Lipinska
Notes On The Genus Sauvetrea (Orchidaceae, Maxillariinae), With A Description Of A New Species, Dariusz L. Szlachetko, Natalia Oledrzynska, Monika M. Lipinska
Turkish Journal of Botany
The genus Sauvetrea Szlach. (Orchidaceae) was segregated from Maxillaria sensu lato in 2007. It embraces a group of from 10 to nearly 20 species, all initially defined as Maxillaria sect. Trigonae. Sauvetrea can be easily distinguished from closely related Rhetinantha M.A.Blanco by the lip callus. During the revision of the materials stored in AMES we came across specimens collected by Vargas in Peru, which were initially identified by Schweinfurth as Maxillaria brachypetala Schltr. We compared Vargas's discovery with the protologue of the latter species and other Sauvetrea, but it does not fit the description of any genus representatives known so …
A Reduced Computational Matrix Approach With Convergence Estimation For Solving Model Differential Equations Involving Specific Nonlinearities Of Quartic Type, Ömür Kivanç Kürkçü
A Reduced Computational Matrix Approach With Convergence Estimation For Solving Model Differential Equations Involving Specific Nonlinearities Of Quartic Type, Ömür Kivanç Kürkçü
Turkish Journal of Mathematics
This study aims to efficiently solve model differential equations involving specific nonlinearities of quartic type by proposing a reduced computational matrix approach based on the generalized Mott polynomial. This method presents a reduced matrix expansion of the generalized Mott polynomial with the parameter-$\alpha$, matrix equations, and Chebyshev--Lobatto collocation points. The simplicity of the method provides fast computation while eliminating an algebraic system of nonlinear equations, which arises from the matrix equation. The method also scrutinizes the consistency of the solutions due to the parameter-$\alpha$. The oscillatory behavior of the obtained solutions on long time intervals is simulated via a coupled …
On Solvability Of Inverse Problem For One Equation Of Fourth Order, Aysel Ramazanova Telman Qizi, Yashar Mehreliyev Topush Oglu
On Solvability Of Inverse Problem For One Equation Of Fourth Order, Aysel Ramazanova Telman Qizi, Yashar Mehreliyev Topush Oglu
Turkish Journal of Mathematics
The work is devoted to study the existence and uniqueness of the classical solution of the inverse boundary value problem of determining the lowest coefficient in one fourth order equation. The original problem is reduced to an equivalent problem. The existence and uniqueness of the integral equation are proved by means of the contraction mappings principle, and we obtained that this solution is unique for a boundary value problem. Further, using these facts, we prove the existence and uniqueness of the classical solution for this problem.
Solution Of Nonlinear Ordinary Differential Equations With Quadratic And Cubic Terms By Morgan-Voyce Matrix-Collocation Method, Mehmet Tarakçi, Mustafa Özel, Mehmet Sezer
Solution Of Nonlinear Ordinary Differential Equations With Quadratic And Cubic Terms By Morgan-Voyce Matrix-Collocation Method, Mehmet Tarakçi, Mustafa Özel, Mehmet Sezer
Turkish Journal of Mathematics
Nonlinear differential equations have many applications in different science and engineering disciplines. However, a nonlinear differential equation cannot be solved analytically and so must be solved numerically. Thus, we aim to develop a novel numerical algorithm based on Morgan-Voyce polynomials with collocation points and operational matrix method to solve nonlinear differential equations. In the our proposed method, the nonlinear differential equations including quadratic and cubic terms having the initial conditions are converted to a matrix equation. In order to obtain the matrix equations and solutions for the selected problems, code was developed in MATLAB. The solution of this method for …