scholarly journals Effect of nitrogen fertiliser on the rate of lipid peroxidation of different maize hybrids in a long-term multifactorial experiment

2021 ◽  
Author(s):  
Á. Illés ◽  
Cs. Bojtor ◽  
A. Széles ◽  
S.M.N. Mousavi ◽  
B. Tóth ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
High Volume ◽  
Optimal Level ◽  
Growth Stages ◽  
Nitrogen Fertilisation ◽  
Significant Difference ◽  
N Dose ◽  
N Treatment ◽  
Phosphorus And Potassium

AbstractThe presented research aimed to confirm that the differences in the lipid peroxidation of three maize (Zea mays L.) hybrids with different genotypes and maturity are due to different nitrogen levels, which was observed based on the amount of malondialdehyde (MDA) measured in the leaves at the main phenological stages of plants. The experiments were performed in a multi-factorial long term fertilisation field trial. In the study, phosphorus and potassium were constantly provided at the optimal level for the plants. The phosphorus and potassium fertilisation were applied in autumn. However, N levels varied from 0 to 300 kg ha−1. Sampling was done at different growth stages 5 times during the growing season (4 leaves, 6 leaves, 8 leaves, 14 leaves, silking). The 300 kg ha−1 N (dose 3) resulted in a significant increase in lipid peroxidation (MDA level), but not a statistically significant difference between the control (dose 1) and the 120 kg ha−1 (dose 2) N doses. The H1 hybrid had the lowest level of lipid peroxidation at the first sampling date. High volume nitrogen fertilisation (dose 3: 300 kg ha−1) increased lipid peroxidation in the hybrids. Averaging the values obtained for the same hybrid at the different sampling times, the medium (dose 2) 120 kg ha−1 N treatment had no significant effect on the lipid peroxidation of the hybrids compared to the values of the control plants. Based on the lipid peroxidation response of the hybrids to N treatment, the exact N dose inflection point can be determined to make the fertiliser utilisation of plants more efficient. Based on our results, we found that inadequate, low (120 kg ha−1) or high (300 kg ha−1) nitrogen fertilisation could affect the MDA levels of plants, thereby affecting the functioning of the lipid peroxidation mechanism.

scholarly journals Influence of Individual Surgeon Volume on Oncological Outcome of Colorectal Cancer Surgery

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Marleen Buurma ◽  
Hidde M. Kroon ◽  
Marlies S. Reimers ◽  
Peter A. Neijenhuis
Keyword(s):  
Colorectal Cancer ◽  
Multivariate Analysis ◽  
Disease Free Survival ◽  
High Volume ◽  
Free Survival ◽  
Significant Difference ◽  
Low Volume ◽  
The Impact ◽  
Disease Free

Background. Surgery performed by a high-volume surgeon improves short-term outcomes. However, not much is known about long-term effects. Therefore we performed the current study to evaluate the impact of high-volume colorectal surgeons on survival.Methods. We conducted a retrospective analysis of our prospectively collected colorectal cancer database between 2004 and 2011. Patients were divided into two groups: operated on by a high-volume surgeon (>25 cases/year) or by a low-volume surgeon (<25 cases/year). Perioperative data were collected as well as follow-up, recurrence rates, and survival data.Results. 774 patients underwent resection for colorectal malignancies. Thirteen low-volume surgeons operated on 453 patients and 4 high-volume surgeons operated on 321 patients. Groups showed an equal distribution for preoperative characteristics, except a higher ASA-classification in the low-volume group. A high-volume surgeon proved to be an independent prognostic factor for disease-free survival in the multivariate analysisP=0.04. Although overall survival did show a significant difference in the univariate analysisP<0.001it failed to reach statistical significance in the multivariate analysisP=0.09.Conclusions. In our study, a higher number of colorectal cases performed per surgeon were associated with longer disease-free survival. Implementing high-volume surgery results in improved long-term outcome following colorectal cancer.

scholarly journals Effect of long-term application of manure and mineral fertilizers on nitrogen mineralization and microbial biomass in paddy soil during rice growth stages

2009 ◽  
Vol 55 (No. 3) ◽  
pp. 101-109 ◽  
Author(s):  
J. Zhang ◽  
J. Qin ◽  
W. Yao ◽  
L. Bi ◽  
T. Lai ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Paddy Soil ◽  
Microbial Biomass Carbon ◽  
Mineral Fertilizers ◽  
Growth Stages ◽  
Net N Mineralization ◽  
Mineral N ◽  
Rice Growth ◽  
Significant Difference

Net N mineralization rate (NMR), net N consumption rate (NCR), microbial biomass carbon (MBC) and nitrogen (MBN), potentially mineralizable N (PMN) and mineral N (N-NH<SUP>+</SUP><SUB>4</SUB> and N-NO<SUP>-</SUP><SUB>3</SUB>) were measured in paddy soil at five growth stages of rice to determine the effect of long-term fertilization in subtropical China. The studied long-term treatments included CK (no fertilization), N, NP, NPK and NPK + OM (NPK plus organic manure). The NPK + OM treatment gave the highest values of the measured variables among all treatments. There was no significant difference in other treatments except for mineral N and PMN at early growth stages. All these variables were generally highest at transplanting stage as two thirds of fertilization was applied as basal fertilizers and the rice uptake was low. Then they decreased or leveled off with the rice growth stages except for MN in all treatments. Stepwise regression revealed that NMR was significantly correlated with MBC and N-NH<SUP>+</SUP><SUB>4</SUB> (<I>R</I><SUP>2</SUP> = 0.954, <I>P</I> < 0.01) at all rice growth stages. So, mineral plus manure fertilizer application and more mineral fertilizer as topdressing were recommended in subtropical paddy soil.

Long-term Outcomes after Off-Pump or Conventional Coronary Artery Bypass Grafting within a Veteran Population

2015 ◽  
Vol 10 (2) ◽  
pp. 133-137 ◽  
Author(s):  
Dominic A. Emerson ◽  
Conor F. Hynes ◽  
Gregory D. Trachiotis
Keyword(s):  
Risk Factors ◽  
Coronary Artery ◽  
Artery Bypass ◽  
High Volume ◽  
Bypass Grafting ◽  
Long Term Outcomes ◽  
Off Pump ◽  
Kaplan Meier ◽  
Significant Difference

Objective Recently published data indicate that outcomes for off-pump coronary artery bypass grafting (OPCABG) may be inferior to conventional CABG (cCABG) within the Veteran population, but this has been only partly addressed within high-volume off-pump centers. Here, we seek to examine the long-term outcomes for these patients within the Veteran population at a single institution well experienced with OPCABG. Methods With the use of a preexisting in-house database, all patients who had undergone isolated CABG from 2000 to 2011 (n = 1125) were identified. From these data, 18 demographic and risk factors were compared and used to create a propensity score, which was used for matching between groups (OPCABG vs cCABG). The primary end point examined was death. Survival was analyzed using the Kaplan-Meier method and the log-rank test. Groups were compared using a Student t test or Fisher exact test, where appropriate. Results Unmatched OPCABG and cCABG groups were found to have significant differences in risk factors, with the OPCABG being a higher-risk population by ejection fraction, chronic obstructive pulmonary disease status, age, and renal function, among others (all P < 0.05). Kaplan-Meier analysis of the unmatched groups demonstrated an increased mortality rate within the higher-risk OPCABG group ( P = 0.0002). With the use of propensity score matching, 337 OPCABG patients were then matched to 337 cCABG controls. Comparison of demographic and risk factors between these matched groups did not demonstrate any statistically significant difference. When Kaplan-Meier analysis was performed for the matched groups, there was no statistically significant difference in survival. In addition, in the matched data set, OPCABG patients had a shorter average length of stay (8.2 vs 9.7 days, P = 0.022), shorter operative time (205 vs 270 minutes, P < 0.001), and lower rate of bleeding complications (0.9% vs 3.6%, P = 0.032). Conclusions In this high-volume off-pump center, matched OPCABG survival is similar to cCABG. Although recent data indicate that OPCABG survival may be worse than that of cCABG within the entire Veteran population, in centers well experienced with OPCABG, this does not seem to hold true. In addition, the benefit of decreased length of stay and lower morbidity rates seems to be significant. Further study of the long-term outcomes of OPCABG in high-volume Veteran's centers is warranted.

1002: Long Term Outcomes for Patients with High Volume Retroperitoneal Teratoma Undergoing Post Chemotherapy Surgery

2007 ◽  
Vol 177 (4S) ◽  
pp. 331-331 ◽  
Author(s):  
Stephen D.W. Beck ◽  
Richard S. Foster ◽  
Richard Bihrle ◽  
John P. Donohue
Keyword(s):  
High Volume ◽  
Long Term Outcomes ◽  
Retroperitoneal Teratoma

23: High Volume Hospitals do not have Better Long Term Outcomes Following Cystectomy for Bladder Cancer

2006 ◽  
Vol 175 (4S) ◽  
pp. 8-9 ◽  
Author(s):  
Brent K. Hollenbeck ◽  
Yongliang Wei ◽  
John D. Birkmeyer
Keyword(s):  
Bladder Cancer ◽  
High Volume ◽  
Long Term Outcomes

Improvement Of Curvilinear Diagrams Of Concrete Deformation

2019 ◽  
pp. 99-104
Keyword(s):  
Reinforced Concrete ◽  
Peak Load ◽  
Experimental Studies ◽  
Concrete Structures ◽  
Deformation Model ◽  
Reinforced Concrete Structures ◽  
Significant Difference ◽  
Deformation Diagrams

Problems when calculating reinforced concrete structures based on the concrete deformation under compression diagram, which is presented both in Russian and foreign regulatory documents on the design of concrete and reinforced concrete structures are considered. The correctness of their compliance for all classes of concrete remains very approximate, especially a significant difference occurs when using Euronorm due to the different shape and sizes of the samples. At present, there are no methodical recommendations for determining the ultimate relative deformations of concrete under axial compression and the construction of curvilinear deformation diagrams, which leads to limited experimental data and, as a result, does not make it possible to enter more detailed ultimate strain values into domestic standards. The results of experimental studies to determine the ultimate relative deformations of concrete under compression for different classes of concrete, which allowed to make analytical dependences for the evaluation of the ultimate relative deformations and description of curvilinear deformation diagrams, are presented. The article discusses various options for using the deformation model to assess the stress-strain state of the structure, it is concluded that it is necessary to use not only the finite values of the ultimate deformations, but also their intermediate values. This requires reliable diagrams "s–e” for all classes of concrete. The difficulties of measuring deformations in concrete subjected to peak load, corresponding to the prismatic strength, as well as main cracks that appeared under conditions of long-term step loading are highlighted. Variants of more accurate measurements are proposed. Development and implementation of the new standard GOST "Concretes. Methods for determination of complete diagrams" on the basis of the developed method for obtaining complete diagrams of concrete deformation under compression for the evaluation of ultimate deformability of concrete under compression are necessary.

The evaluation of lipid peroxidation and oxidative modification of proteins in blood serum under obesity development and the consumption of aqueous kidney beans Phaseolus vulgaris pods extract

2020 ◽  
Vol 33 (1) ◽  
pp. 38-44
Author(s):  
Alona Yurchenko ◽  
Daryna Krenytska ◽  
Olexii Savchuk ◽  
Tetiana Halenova ◽  
Natalia Raksha ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Oxidative Modification ◽  
Resistance Development ◽  
Oxidative Modification Of Proteins ◽  
Kidney Beans ◽  
Calorie Diet ◽  
Diet Control ◽  
High Calorie Diet ◽  
High Calorie

AbstractOur interest has focused on the investigation of the anti-obese potential of kidney beans (P. vulgaris) pods extract. In the course of the study, obesity development in rats was induced with high-calorie diet. Control and obese rats then have consumed with aqueous kidney beans (P. vulgaris) pods extract during 6 weeks (200 mg/kg). Results show that the long-term consumption of P. vulgaris pods extract can lead to the reduction of hyperglycemia and insulin resistance development. Furthermore, we saw a normalization of lipid peroxidation parameters and oxidative modification of protein due to the consumption of the kidney beans (P. vulgaris) pods extract. Our experimental data demonstrate the ability of the kidney beans (P. vulgaris) pod extracts to mitigate obesity development but the details of this mechanism remains to be not fully understood.

TRANSFORMATION FEATURES OF THE DRAINED PEAT-PODZOL GLEY SOILS UNDER LONG-TERM AGRICULTURAL USE

1970 ◽  
pp. 25-28
Author(s):  
V. А. Shevchenko ◽  
A. V. Nefedov ◽  
A. V. Ilinskiy ◽  
А. Е. Morozov
Keyword(s):  
Humus Horizon ◽  
Total Carbon ◽  
Mineral Fertilizers ◽  
Peat Layer ◽  
Organic And Mineral Fertilizers ◽  
Mineralization Processes ◽  
Agricultural Use ◽  
Phosphorus And Potassium ◽  
Plough Layer

Long-term observations of the drained soil of peat-podzolic-gley light loam on ancient alluvial sands state on the example of the meliorative object "Tinky-2" showed that under the influence of agricultural use in the soil, the organic matter mineralization processes are accelerated. During the drainage process, the soil evolutionarily suffered the following changes: the peat layer was compacted, humified and mineralized, which was a reason of the transformation them into the humus horizon. Based on the monitoring studies results it was established that during 21 intensive use years the peat layer thickness was decreased by 74.5% and amounted to 5.51 inch, which in the following 20 years was decreased to a layer of 1.18 inch, and for another 14 years it became a homogeneous humus horizon containing difficulty identifiable plant remains. For half a century, the bulk density increased by 6 times and the total moisture capacity of the soil decreased by 3.6 times. Other indicators were changed significantly. So, the ash content by 2016 increased from 11.2% to 52.7%. It was a reason of the plough-layer decreasing and it mixes with the mineral sand horizon during plowing. It should also be noted that the total nitrogen content in the soil decreased by 1.13%, and total carbon by 15.3% from 1982 to 2016. The dynamics of changes in the soil acidity, phosphorus and potassium content is associated with the introduction of calcareous, organic and mineral fertilizers in the 1980s. The unsystematic exploitation of such soils leads to decrease in the agricultural products productivity and increase in energy costs. When planning these soils usage in agricultural production, it is necessary to develop and implement modern melioration technologies and techniques aimed to increase soil fertility.

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