排序方式： 共有39条查询结果，搜索用时 15 毫秒
31.
I. Erdogan Orhan E. GunerN. Ozturk F.S. SenolS. Aslan Erdem M. KartalB. Sener 《Industrial Crops and Products》2012,37(1):213-218
In the present study, acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and tyrosinase inhibitory and antioxidant activities of the fruit and leaf extracts of Melia azedarach L. (Meliaceae) of Turkish origin were evaluated. Enzyme inhibitory activity of the extracts was tested in vitro using ELISA microplate reader. Antioxidant activity of the extracts was tested using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, ferrous ion-chelation, and ferric-reducing antioxidant power (FRAP) assays. Phenolic composition of the extracts was elucidated by high performance liquid chromatography (HPLC) and fatty acid compositions of the fatty oils of the fruits and leaves were elucidated by gas chromatography-mass spectrometry (GC-MS). The ethyl acetate extract from the leaves showed the highest inhibition against AChE (33.63 ± 1.40%) and BChE (92.89 ± 3.05%). The methanol extract from the leaves exerted the best antioxidant activity in DPPH radical scavenging and FRAP assays, while the ethyl acetate extracts of the fruits and leaves had the most notable effect in metal-chelation assay. 相似文献
32.
Hülya Turan Yalçin Kaya M. Emin Erdem 《Journal Of Aquatic Food Product Technology》2013,22(1):100-107
Proximate composition, cholesterol, and fatty acid content of brown shrimp (Crangon crangon L. 1758) harvested from the Sinop region of the Black Sea in Turkey was determined. Crude protein, lipid, moisture, and ash contents were 18.47 ± 0.09 g/100 g, 0.95 ± 0.05 g/100 g, 79.21 ± 0.01 g/100 g, and 1.39 ± 0.01 g/100 g, respectively. Cholesterol content was 173.56 ± 0.24 mg/100 g. Fatty acid composition was 33.04% saturated (SFAs), 22.17% monounsaturated (MUFAs), and 29% polyunsaturated (PUFAs). Among the SFAs, palmitic acid (C16:0) was predominant at 20.69% of the total fatty acid composition. Oleic acid (C18:1) was the predominant MUFA (14.25%), and the highest PUFAs were eicosapentaenoic acid (EPA, C20:5n-3) and docosahexaenoic acid (DHA, C22:6n-3), contributing 41% and 32% to the total PUFA content of the lipids, respectively. Thrombogenicity (TI) and atherogenicity (AI) index values were 0.31 and 1.34, respectively. The highest essential amino acids were leucine, lysine, valine, and isoleucine; while the highest levels of non-essential amino acids were aspartic acid, glutamic acid, glycine, and alanine, respectively. 相似文献
33.
Copper accumulation in the gill, liver, kidney, spleen, and muscle tissues of Oreochromis niloticus was determined after exposing the fish to 10, 50, and 100 μg Cu/L applied as copper sulphate (CuSO4) and copper oxide nanoparticles (CuO NPs) after 1, 7, and 15 days. Changes in the liver SOD, CAT, and GPx activities influenced by this accumulation were also studied. No mortality was observed during the experiments. Copper levels increased in the gill, liver, kidney, and spleen tissues of O. niloticus compared to control when exposed to both CuSO4 and CuO NPs, whereas no accumulation was detected in muscle tissue at the end of the exposure period. Highest accumulation of copper was observed in the order of the liver, kidney, spleen, and gill tissues, respectively. SOD, CAT, and GPx activities increased in the liver tissue at the end of the exposure period. Overall, CuO NPs are more effective than CuSO4 in terms of tissue accumulation and liver enzyme activities. 相似文献
34.
Effects of different sources of organic matter on soil aggregate formation and stability: A laboratory study on a Lithic Rhodoxeralf from Turkey 总被引：2，自引：0，他引：2
In this study the influences of three different organic sources on aggregate formation and stability in soil were investigated.Our approach involves establishing plot experiment in the greenhouse with a Lithic Rhodoxeralf and a variety of carbon sources having specific chemical properties applied to the soil of individual plots. Treatments include K-Humate (KH, 25, 50 and 100 kg/ha), Concentrated Plant Extract (CPE, 50, 100, 200 kg/ha) and Molasses (M, 50, 100, 200 kg/ha). After a seven-month incubation period, aggregate formation and their stability were determined and their correlation to different C sources was developed.The effect of KH on aggregate formation was significant for 2–1 mm aggregates (P < 0.05) and 0.5–0.25 mm aggregates (P < 0.01). The effect of CPE on aggregate formation was significant for 0.5–0.25 aggregates (P < 0.05), while the M had no significant effect on aggregate formation in any aggregate size. The effect of KH on aggregate stability was significant for 8–4 mm and 1–0.5 mm aggregates (P < 0.01). The effect of CPE on aggregate stability was significant for 0.5–0.25 mm aggregates (P < 0.05), while the M was significant for 8–4 mm aggregates (P < 0.05). 相似文献
35.
In this study, an analysis on the breaking elongation mechanism of the polyester/viscose blended open-end rotor spun yarns
has been carried out. In addition, a back propagation multi layer perceptron (MLP) network and a mixture process crossed regression
model with two mixture components (polyester and viscose blend ratios) and two process variables (yarn count and rotor speed)
are developed to predict the breaking elongation of polyester/viscose blended open-end rotor spun yarns. Seven different blend
ratios of polyester/viscose slivers are produced and these slivers are manufactured with four different rotor speed and four
different yarn counts in rotor spinning machine. In conclusion, ANN and statistical model both have given satisfactory predictions;
however, the predictions of ANN gave relatively more reliable results than those of statistical models. Since the prediction
capacity of statistical models is also obtained as satisfactory, it can also be used for breaking elongation (%) prediction
of yarns because of its simplicity and non-complex structure. In addition, it is also found in this study that yarn count,
rotor speed and breaking elongation of polyester-viscose fibers and the blend ratios of these fibers in the yarn have major
effects on yarn breaking elongation. 相似文献
36.
Uğur Topaloğlu Mehmet Erdem Akbalik Hakan Sağsöz 《Anatomia, histologia, embryologia》2021,50(4):726-735
Homeobox (HOX) proteins are known for their critical role in body shape formation and tissue differentiation of developing vertebrate embryos. Recent research has shown that HOX proteins have many physiological roles such as cell proliferation, cell cycle, apoptosis and cell differentiation in adults, as well as the development of the vertebrate nerve and reproductive system. This study was conducted to determine the possible physiological functions and expression intensities of HOXA10, HOXA11, HOXB6 and HOXC6 proteins in the male reproductive system (testes, epididymis and deferens ducts), which are important for the continuity of some specific cat breeds in different age ranges. In the study, a total of 18 testicular tissues were used, divided into two groups: less than 6 months (immature) and more than 1 year (mature). Tissue samples were then subjected to immunohistochemical staining with protein-specific antibodies examined in the study. In the findings obtained in the research; it was observed that HOXA10, HOXA11, HOXB6 and HOXC6 produced different intensities of immunolocalization in the epididymis and ductus deferens layers in the immature and mature testicular cells. In addition, it was found that HOXA10 immunoreaction was also seen in some vascular endothelial cells. As a result, it was concluded that the HOX proteins could contribute to the physiological functions of testes, epididymis and ductus deferens and affect male fertility. 相似文献
37.
Tahir Karasahin Hasan Alkan Fatma Satilmis Sukru Dursun Huseyin Erdem 《Reproduction in domestic animals》2021,56(12):1555-1561
This study aimed to determine the effect of flunixin meglumine treatment during and after the transfer of in vivo produced embryos to Angus (cows) and Holstein (cows and heifers) breeds of cattle on pregnancy rate. Holstein cows were used as donors in the study. A double dose of prostaglandin F2α was administered to the recipient animals for synchronization. Uterine flushing was performed in donors on day 7 after artificial insemination. A total of 295 transferable embryos were obtained. These embryos were transferred to Angus cows (n = 85), Holstein heifers (n = 80) and Holstein cows (n = 130). After the transfer, these animals were divided into three subgroups. The first subgroup (TI) was administered flunixin meglumine during embryo transfer, and the second subgroup (TII) was administered flunixin meglumine both during embryo transfer and on days 8 and 9 after the transfer. The third subgroup (TIII) was not administered anything and it was considered the control group. Pregnancy examination of the recipients was performed on days 30–35 after the transfer using real-time ultrasonography. The pregnancy rates after embryo transfer were found to be 43.52% in Angus cows, 42.5% in Holstein heifers, and 24.61% in Holstein cows (p < .05). When the animals were not classified according to breed, the pregnancy rates in subgroups TI, TII and TIII were found to be 29.29%, 45.10% and 29.79%, respectively (p < .05). In addition, the pregnancy rates were higher in TII and TIII subgroups of Angus cows and Holstein heifers compared to that of Holstein cows (p < .05). As a result, the pregnancy rates obtained after embryo transfer in Angus cows and Holstein heifers were found to be higher than that in Holstein cows. In addition, it was concluded that the administration of flunixin meglumine during and during/after embryo transfer has a positive effect on pregnancy rates in Angus cows and Holstein heifers. 相似文献
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39.
In this paper, the daily reference evapotranspiration (ET0) for Bulawayo Goetz was estimated from climatic data using neuro computing techniques. The region lacks reliable weather data and experiences inconsistencies in the measuring process due to inadequate and obsolete measuring equipment. This paper aims to propose neuro computing techniques as an alternative methodology to estimating evapotranspiration. Firstly, ET0 was calculated using FAO-56 Penman-Monteith (PM) equation from available climatic data. Data was divided into training, testing and validation for neuro computing purposes. The study also investigated the effect of different normalisation techniques on neuro computing ET0 estimation accuracy. In another application, neuro-computing ET0 estimates were compared against those obtained using empirical methods and their calibrated versions. The Z-score normalisation technique for all data sets gave best results with a Multi-layer perceptron (5–5-1) model having RMSE, MAE and R2 values in the range 0.12–0.25 mm day?1, 0.08–0.15 mm day?1 and 0.94–0.99 respectively. There were no significant differences in ET0 estimation accuracy by neuro computing techniques due to normalisation technique. The Neuro computing techniques were superior to empirical methods in ET0 estimation for Bulawayo Goetz. The Neuro computing techniques are recommended for use in cases of limited climatic data at Bulawayo Goetz. 相似文献