209 research outputs found

    Tree Growth Yield and Fruit Quality of Different Apple Cultivars Trained as Super Spindle

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    This study was carried out on Topaz, Cooper 39 and Muscat apple cultivars grafted on M27 rootstocks under Tokat ecological conditions during 2008 - 2010. The trees planted in 2.0 m x 0.5 m row spacing (10,000 trees ha-1) and trained to super spindle (SS) training system. The vegetative development, yield and fruit quality performances of the trees supported by wire – pole combination were observed for three years. At the end of the experiment, it was determined that Cooper 39 had a higher trunk cross sectional area (TCA) than Topaz and Muscat. While cumulative yield (CY) per tree and cumulative yield efficiency (CYE) were determined to be the highest in Cooper 39, these values were found to be the lowest in Topaz. CY per hectare over the first three crop year was found to be the highest in Cooper 39 and the yield reached to 142.9 t.ha1. The lowest CY per hectare (69.6 ton ha-1) was determined in Topa

    Human Factor in Teaching: Teacher Perspective-I

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    Without a human element, teaching can never provide students with what they want. In this qualitative study, educator perspectives on what is good for great teachers were explored through a 3-statement google form. To better understand what “a great teacher” means, one hundred educators from four countries (Nigeria, Georgia, Cambodia, and Iraq) were asked to fill out an online questionnaire. This research shows that, despite some commonalities, there are various definitions of a great teacher across countries. These different perspectives positively or negatively affect teacher-student relations and education quality in institutions from country to country

    Effect of drought on aquaporin expression in grafted and ungrafted grapevine cultivars

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    Drought stress severely affects growth, development and productivity in most agricultural crops. Since ancient times, rootstocks have been used to enable crop cultivation in unsuitable soil conditions. In the present study, three factors were evaluated: 1) cultivar: Vitis vinifera L. cv. ‘Horozkarası’ (drought-tolerant) and cv. ‘Kabarcık’ (drought-sensitive) were used; 2) rootstock: each cultivar was self-rooted and grafted onto ‘Rupestris du Lot’ rootstock; 3) drought stress: half of each cultivar/rootstock combination underwent drought stress and the other half was irrigated at field capacity for seven days. In order to estimate the responses of the cultivars, relative water content, proline content and aquaporin isoform expression levels (VvPIP2;1, VvPIP2;2, VvTIP1;1, and VvTIP2;1) were quantified. The results revealed that drought stress caused more reduction in relative water content (RWC) in ‘Kabarcık’ cultivar (drought-sensitive) than in ‘Horozkarası’ cultivar (drought-tolerant). Proline content increased in both cultivars in response to drought stress but to a relatively greater extent in the grafted ‘Kabarcık’ cultivar. Considering expression levels of genes, VvPIP2;1, VvPIP2;2, and VvTIP2;1 were downregulated whilst VvTIP1;1 was upregulated in the leaf. Both ‘Horozkarası’ and ‘Kabarcık’ cultivars showed similar trends in terms of their responses to drought stress. Grafting significantly increased the proline content in both cultivars exposed to drought stress. The rootstock conferred better drought protection to ‘Kabarcık’ cultivar than to ‘Horozkarası’ cultivar

    The effects of pre-harvest napthalene acetic acid and aminoethoxyvinylglycine treatments on storage performance of ‘ Ak Sakı’ apple cultivar grown in Erzincan conditions

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    This study was carried out to determine the effects of pre-harvest aminoethoxyvinylglycine (AVG, 150, 225 ve 300 mg/L) and naphthaleneacetic acid (NAA, 20 mg/L) treatments in different doses on storage performance of ‘Ak Sakı’ apple cultivar (Malus domestica Borkh.) in 2012. The changes on some fruit quality parameters were measured at 2±1 oC temperature and with 90±5 % relative humidity at 45 days interval during storage. The lowest weight loss was obtained from 300 mg/L AVG treated fruits during the storage. In the all analysis date, the highest L* value was obtained from 300 mg/L AVG treated fruits, and the lowest hue angle value was reported from the fruits of control treatment. The flesh firmness was determined that the best kept in the 225 and 300 mg/L AVG treated fruits during the storage. The flesh firmness significantly reduced with NAA treatment at the end of storage. The highest soluble solids concentration (SSC) was obtain from control fruit during the storage, whereas the lowest SSC was observed in fruit treated with 300 mg/L AVG. In the all analysis date, the highest titratable acidity was obtained in fruits treated with 225 and 300 mg/L AVG. The starch degradation was delayed with AVG treatments

    Determination of Serum Adenosine Deaminase and Xanthine Oxidase Levels in Patients with Crimean–Congo Hemorrhagic Fever

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    OBJECTIVE: Crimean-Congo hemorrhagic fever is an acute viral hemorrhagic fever with a high mortality rate. Despite increasing knowledge about hemorrhagic fever viruses, little is known about the pathogenesis of Crimean-Congo hemorrhagic fever. In this study, we measured serum adenosine deaminase and xanthine oxidase levels in Crimean-Congo hemorrhagic fever patients. METHODS: Serum adenosine deaminase levels were measured with a sensitive colorimetric method described by Giusti and xanthine oxidase levels by the method of Worthington in 30 consecutive hospitalized patients (mean age 42.6 ± 21.0). Laboratory tests confirmed their diagnoses of Crimean-Congo hemorrhagic fever. Thirty-five subjects (mean age 42.9 ± 19.1) served as the control group. RESULTS: There was a significant difference in adenosine deaminase and xanthine oxidase levels between cases and controls (p<0.05). However, neither adenosine deaminase nor xanthine oxidase levels varied with the severity of disease in the cases assessed (p>0.05). CONCLUSION: Adenosine deaminase and xanthine oxidase levels were increased in patients with Crimean-Congo hemorrhagic fever. Elevated serum xanthine oxidase activity in patients with Crimean-Congo hemorrhagic fever may be associated with reactive oxygen species generated by the xanthine/xanthine oxidase system during inflammatory responses. In addition, elevated lipid peroxidation may contribute to cell damage and hemorrhage. The association of cell damage and hemorrhage with xanthine oxidase activity should be further investigated in large-scale studies

    Effects of polyamine synthesis enzymes on angiogenesis and apoptosis during endometriosis

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    Objectives: Since we assumed that endometriosis is a benign cell division disorder, our study was conducted to investigate the effects of the relationships between polyamine synthesis and angiogenesis in the formation of endometriosis. Material and methods: Thirty-five patients with endometriosis and 35 healthy female women were included in the study. The patient and the control groups were compared regarding the blood levels of agmatine, argininecarboxylase (ADC), ornithinecarboxylase (ODC), agmatinase, arginase, ornithine, and the vascular endothelial growth factor (VEGF). Results: There is a statistically significant difference between the patient and the control groups regarding the agmatinase, arginase and VEGF levels (higher in the patient group) (p &lt; 0.05). There is no statistically significant difference between the patient and the control groups regarding the ODC, ornithine and the ADC levels (p &gt; 0.05). There is a statistically significant difference between the patient and the control groups regarding the agmatine levels (higher in the control group) (p &lt; 0.05). Conclusions: The increase in the serum levels of polyamine synthesis enzymes may contribute to the formation of endometriosis. It is anticipated that the study of the relationship between enzymes and molecules in the polyamine synthesis pathway and angiogenesis in patients with endometriosis will contribute to the literature

    Effects of evening primrose oil and 5-fluorouracil on the healing of colonic anastomoses in rats

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    Aim: This study was designed to evaluate the efficacy of evening primrose oil (EPO) on colonic anastomosis. Methods: Sixty rats with colonic anastomosis were randomly divided into six groups. EPO and 5-Fluorouracil (5-FU) were administered at doses of 5 g/kg/day and 20 mg/kg/day, respectively.&nbsp; Group 1 served as sham control. The rats in Group 2 (EPO) received EPO (14 days preoperatively), in Group 3 (Extended EPO) received EPO (14 days preoperatively and 7 days postoperatively), in Group 4 (5-FU) received intraperitoneally 5-FU (5 days preoperatively), in Group 5 (5-FU+EPO) received EPO (14 days preoperatively), and 5-FU (5 days preoperatively), in Group 6 (5-FU+ extended EPO) received EPO (14 days preoperatively and 7 days postoperatively)&nbsp; and 5-FU (5 days preoperatively). Histopathological examination, bursting pressure, and hydroxyproline content were used for evaluation. Results: Significant differences were found between the Groups 1, 2, and 3 and Groups 4, 5, and 6 in bursting pressures. Polymorphonuclear leukocyte (PMNL) and lymphocyte infiltration was significantly less in group 3, compared to the control and group 2. The least PMNL infiltration was in group 6 compared to groups 4 and 5.&nbsp; The hydroxyproline level was different in group 3 compared to the control and group 2. Furthermore, groups 5 and 6 were different compared to group 4. Conclusion: EPO had favorable effects on colonic anastomosis even in groups where 5-FU was used

    CRISPR-Of-Things%253A Applications and Challenges of the Most Popular Gene Editing Tool in the Fields of Health, Agriculture and Environment

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    Almost all cells of any living organism contain DNA, a hereditary molecule that passes from generation to generation during reproduction. The term quot%253Bgenomequot%253B generally refers to the total DNA sequences in an organism. The genome consists of DNA sequences called gene, which plays a role in the basic biological processes involved in many phenotypic and genotypic characteristics, such as performing cellular functions, controlling numbers and species, regulating energy production, metabolism, and combating diseases. Gene editing is the process of pre-designing and modifying a particular DNA sequence in a targeted gene. The most widely used technique is CRISPR-Cas technology. For this purpose, the DNA helix is ​​cut at a certain point, to form a double-strand break (DSB), and naturally existing cellular repair mechanisms repair the DSB. Modes of the repair mechanisms may affect the gene function. When DSB is formed, gene editing techniques can be applied to remove, insert, or replace a newly modified sequence using a synthetic donor template DNA. In developed and developing countries, CRISPR-Cas studies in addition to research and development studies are rapidly increasing. In addition to increasing population, changing weather conditions, declining farmland, increasing biotic and abiotic stresses are other important barriers to agricultural production, food, and feed supply. In this report, CRISPR-Cas applications are introduced in detail from the studies that carried out gene modifications in the fields of health, animals, plants, microorganisms, and food supply. Besides, these technologies and applications have been examined in terms of world biosafety legislation and the scientific risk assessment of the products developed using the CRISPR-Cas technique

    TURKISH JOURNAL of ONCOLOGY Leptomeningeal Carcinomatosis in a Krukenberg Tumor Associated with Signet Ring Cell Gastric Cancer

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    SUMMARY Leptomeningeal carcinomatosis (LCM) is a rare complication of gastric cancer. It usually occurs late in advanced stage of disease and is sometimes misdiagnosed as toxicity of chemotherapeutic agents. Here we report a rare case of gastric cancer that developed LCM in follow-up. A 28-year-old woman with signet ring cell gastric cancer associated with Krukenberg tumor was admitted with persistent headache, nausea, vomiting, vertigo, and diplopia. Linear appearance of contrast enhancement in cerebellar fissures and around cranial nerves was seen in magnetic resonance imaging and cerebrospinal fluid was hypercellular with numerous carcinoma cells. LMC was confirmed and treated with intrathecal methotrexate and additional whole-brain irradiation. LCM is a rare complication, but occurs more often than expected and is often misdiagnosed. If patient who is being treated for gastric cancer presents with neurological symptoms, LCM should be kept in mind. Clinical improvement can be achieved with current treatment modalities, including radiotherapy, chemotherapy, or targeted molecules
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