scholarly journals Relationship between Oxalate Concentration and Leaf Position in Various Spinach Cultivars

HortScience ◽  
1994 ◽  
Vol 29 (9) ◽  
pp. 1019-1021 ◽  
Author(s):  
I. Okutani ◽  
N. Sugiyama
Keyword(s):  
Spinacia Oleracea ◽  
Negative Relationship ◽  
Leaf Position ◽  
Fresh Weight ◽  
Oxalate Concentration ◽  
The Relationship

A negative relationship has been reported between the oxalate concentration in leaves and leaf position numbered from the base for `Okame' spinach (Spinacia oleracea L.). We compared changes in leaf and stem oxalate concentrations among three cultivars. `Viroflay' differentiated and developed leaves at a lower rate than did `Okame' and `Kyoho'. Oxalate concentrations in plant tops decreased with time in `Okame' and `Kyoho', but `Viroflay' changed little. The relationship between leaf oxalate concentration (Y; millimoles per gram of fresh weight) and its position on the stem (X) was the same for all cultivars and can be given as Y = -0.0089X + 0.158.

scholarly journals Evaluation of Oxalate Concentration in the U.S. Spinach Germplasm Collection

HortScience ◽  
2008 ◽  
Vol 43 (6) ◽  
pp. 1690-1693 ◽  
Author(s):  
Beiquan Mou
Keyword(s):  
Spinacia Oleracea ◽  
Germplasm Collection ◽  
Dry Weight ◽  
Weight Basis ◽  
Fresh Weight ◽  
Fresh Weight Basis ◽  
Oxalate Concentration ◽  
Commercial Cultivars ◽  
Low Levels ◽  
The U.S

The entire USDA spinach (Spinacia oleracea) germplasm collection (338 accessions) and 11 commercial cultivars were screened for oxalate concentration. There were significant differences in oxalate concentration among the genotypes evaluated, ranging from 5.3% to 11.6% on a dry weight basis. The low-oxalate genotypes identified in our experiments are all S. oleracea. None of the two S. tetrandra and four S. turkestanica accessions screened had low levels of oxalate. Two accessions from Syria, PI 445782 (cultivar name Shami) and PI 445784 (cultivar name Baladi), consistently had low oxalate concentration. When expressed on a fresh weight basis, oxalate concentration may be affected by the moisture content of the plant. Oxalate concentration had little correlation with leaf types (flat or savoy) and leaf weight per plant. With the genetic variation and sources of low oxalate concentration found, breeding of spinach for a low level of oxalate seems feasible.

scholarly journals OXALATE CONCENTRATION IN SPINACH LEAVES DURING ONTOGENESIS

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 642c-642
Author(s):  
Iwane Okutani ◽  
Nobuo Sugiyama
Keyword(s):  
Growth Rates ◽  
Leaf Growth ◽  
Sequential Sampling ◽  
Solution Culture ◽  
Plant Age ◽  
Leaf Position ◽  
Fresh Weight ◽  
Constant Rate ◽  
The Relationship ◽  
Spinach Leaves

Changes in oxalate concentrations in individual leaves during ontogenesis were examined by a sequential sampling of spinach plants grown in solution culture. The period between initiation of two successive leaves was 1.58 days. Fresh weight of each leaf increased at a constant rate with time after the leaf became 1 cm in length. Oxalate concentrations in plant tops decreased gradually with plant age. Oxalate concentrations in each leaf remained constant during ontogenesis, and they were negatively correlated with the leaf position numbered from the base. Leaf growth rates and the relationship between oxalate concentrations and leaf position were combined to make a model that describes the changes in oxalate concentrations in plant tops as the age of the plant advanced. The resulting model indicated that oxalate concentrations in plant tops decreased more rapidly as plastochron became shorter.

scholarly journals Seasonal Change of Nitrate and Oxalate Concentration in Relation to the Growth Rate of Spinach Cultivars

HortScience ◽  
2006 ◽  
Vol 41 (7) ◽  
pp. 1589-1595 ◽  
Author(s):  
Aiko Kaminishi ◽  
Nobuhiro Kita
Keyword(s):  
Growth Rate ◽  
Seasonal Change ◽  
Negative Correlation ◽  
Spinacia Oleracea ◽  
Nitrate Concentration ◽  
Application Rate ◽  
Strong Positive Correlation ◽  
Fresh Weight ◽  
Oxalate Concentration ◽  
Moderate Negative Correlation

Reduction of nitrate and oxalate content in spinach (Spinacia oleracea L.) has become the major concern in terms of their toxicity to human health. The primary objectives of this study were 1) to determine the seasonal change in nitrate and oxalate concentrations and 2) to elucidate the relationship between growth rate and concentration of nitrate and oxalate in spinach. In a replicated field experiment in Hiratsuka, Japan, the authors grew 182 cultivars of spinach over four growing seasons (winter, spring, summer, and fall) under the nitrogen application rate of 100 kg N·ha–1. The average number of days required for harvest was the shortest in summer (32.7days) and was longest in the winter (85.7 days). Mean nitrate concentration in spinach was significantly low in the winter (3797 mg·kg–1 fresh weight) compared with the other three seasons (4122–4328 mg·kg–1 fresh weight) in which no significant differences were found in mean nitrate levels. In contrast, oxalate concentrations showed a distinct seasonal variation, being the lowest in the fall (6149 mg·kg–1 fresh weight), followed by the summer (7525 mg·kg–1 fresh weight) and the spring (8903 mg·kg–1 fresh weight), and was the highest in the winter (10,929 mg·kg–1 fresh weight). Relative nitrate concentration showed a moderate negative correlation with relative days required for harvest (r = 0.411, P < 0.001), whereas relative oxalate concentration showed a strong positive correlation with relative days required for harvest (r = 0.566, P < 0.001). Accordingly, a moderate negative correlation (r = 0.325, P < 0.001) was detected between nitrate and oxalate concentrations. Moreover, fast-growing cultivars contained higher nitrate and lower oxalate, whereas slow-growing cultivars contained lower nitrate and higher oxalate. These results indicate that the growth rate primarily accounts for the nitrate and oxalate concentration in spinach, and nitrate and oxalate might play a counterrole to each other.

Risk Attitude and Corporate Investment under Output Market Uncertainty: Evidence from The Mekong River Delta, Vietnam

2016 ◽  
pp. 59-70
Author(s):  
Ninh Le Khuong ◽  
Nghiem Le Tan ◽  
Tho Huynh Huu
Keyword(s):  
Negative Relationship ◽  
Risk Attitude ◽  
Business Strategies ◽  
Risk Averse ◽  
Market Uncertainty ◽  
Firm Investment ◽  
Output Market ◽  
The Impact ◽  
The Relationship

This paper aims to detect the impact of firm managers’ risk attitude on the relationship between the degree of output market uncertainty and firm investment. The findings show that there is a negative relationship between these two aspects for risk-averse managers while there is a positive relationship for risk-loving ones, since they have different utility functions. Based on the findings, this paper proposes recommendations for firm managers to take into account when making investment decisions and long-term business strategies as well.

Relationship of Organizational Citizenship Behavior and Production Deviance: Role of Perceived Organizational Politics

2019 ◽  
Vol 34 (2) ◽  
pp. 367-382
Author(s):  
Irsa Fatima Makhdoom ◽  
Mohsin Atta ◽  
Najma Iqbal Malik
Keyword(s):  
Organizational Citizenship ◽  
Organizational Citizenship Behavior ◽  
Negative Relationship ◽  
Civic Virtue ◽  
Organizational Politics ◽  
Work Behavior ◽  
Citizenship Behavior ◽  
Production Deviance ◽  
Relationship Of ◽  
The Relationship

The present study was an endeavor to extend the literature of perceived organizational politics by examining its moderating role between the relationship of organizational citizenship behavior and production deviance. Organizational Citizenship Behavior Scale (Mackenzie, Podsakoff, & Paine, 1999), Production Deviance sub-scale of Counterproductive Work Behavior Checklist-32 (Spector et al., 2006), and Perception of Organizational Politics Scale (Kacmar & Carlson, 1997) were used in present study. Hierarchical regression analyses revealed that low levels of perceived organizational politics moderated the relationship between courtesy and production deviance by strengthening the negative relationship of these behaviors while perceived organizational politics did not act as a moderator for the relationship of civic virtue and conscientiousness with production deviance. High level of go-along-to-get-ahead as a moderator strengthened the relationship of civic virtue and conscientiousness with production deviance and its low level was found to be moderating the relationship between courtesy and production deviance. Future implications of the study were also discussed.

Work Stress and Organisational Citizenship Behaviours (OCBs) in Call Centers Employees

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Sunita ◽  
Urvashi Singh ◽  
Shalini Singh ◽  
Rajnee Sharma
Keyword(s):  
Negative Impact ◽  
Call Centers ◽  
Negative Relationship ◽  
Married Couples ◽  
Call Centre ◽  
Simple Correlation ◽  
Nuclear Families ◽  
Set Up ◽  
Stress At Work ◽  
The Relationship

The present study was conducted to examine the relationship between organisational stress and organisational citizenship behaviours (OCBs) in employees of call centers. The study also further explored as how stress at work set-up has negative impact on OCBs. A sample of 250 employees working in call centre of Gurgaon belonging to an age group of 25-30 years were selected on availability basis. All were working married couples living in nuclear families. Job stress survey (Spielberger & Vagg, 1999) and Organisational Citizenship Behaviour (Bateman & Organ, 1983) were administered. Data was analysed by using simple correlation and multiple regression. Results showed the negative relationship between organisational stress and OCBs. Results of regression analysis also exhibited the negative impact of stress on OCBs. The implications for the employees are discussed.

The Relationship Among Job Satisfaction, Oreganizational Commitiment and Employees’ Turnover at Unilever Corporation in Nigeria

2017 ◽  
Vol 5 (1) ◽  
pp. 370
Author(s):  
Chiemeke Kingsley Chiedu ◽  
Choi Sang Long ◽  
Hapriza BT Ashar
Keyword(s):  
Job Satisfaction ◽  
Organizational Commitment ◽  
Organizational Performance ◽  
Employee Turnover ◽  
Turnover Intentions ◽  
Pearson Correlation ◽  
Negative Relationship ◽  
Survey Method ◽  
Employee Turnover Intentions ◽  
The Relationship

Employee turnover has become a key performance indicator for many organizations as they struggle to retain talented employees. The negative impact of turnover on organizational performance has continually forced organizational leaders to seek better ways of retaining valuable employees. The relationship between man and work has always attracted the attention of philosophers. A major part of men’s life is spent at work. Work is social reality and social expectation to which men seem to conform. It not only provides status to the individual but also binds him to the society. An employee who is satisfied with his job would perform his duties well and be committed to his job, and subsequently to his organization. This paper examines relationship among job satisfaction, organizational commitment and employees’ turnover intentions at Unilever Corporation in Nigeria. The data for this study was collected from 117 employees currently working at Unilever Nigeria PLC using the survey method via the questionnaire. Pearson Correlation and the multiple regression analysis techniques using the SPSS version 22.0 was used for the data analysis. The findings of the study revealed that both job satisfaction and organizational commitment have significant negative relationship with employee turnover intentions. In addition, organizational commitment was revealed to have a more dorminant influence on employee turnover intentions than job satisfaction. Based on these findings, the implications, recommendations, practice, and theory were discussed.

Sensitivity of Selected Vegetable and Weed Seedlings to Ultraviolet-B Radiation

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 480e-480
Author(s):  
Nancy H. Furness ◽  
Mahesh K. Upadhyaya ◽  
Douglas P. Ormrod
Keyword(s):  
Brassica Oleracea ◽  
Leaf Area ◽  
Spinacia Oleracea ◽  
Relative Sensitivity ◽  
Amaranthus Retroflexus ◽  
Ultraviolet B ◽  
Seedling Height ◽  
Fresh Weight ◽  
Stellaria Media ◽  
Green Foxtail

Relative sensitivity of selected vegetable and weed seedlings to ultraviolet-B (UV-B) radiation (280–320 nm) was investigated. Seedlings were grown for 4 weeks in a greenhouse, in chambers equipped with UV-B-emitting fluorescent tubes and Mylar (control) and cellulose acetate (UV-B) filters. UV-B radiation reduced seedling height, leaf area, and leaf fresh weight in tomato (Lycopersicon esculentum `Cour Di Bue'), broccoli (Brassica oleracea var. Italica `Purple Sprouting'), cabbage (Brassica oleracea var. Capitata `Red Drumhead'), and cucumber (Cucumis sativus `Straight Eight'), leaf area and leaf fresh weight in beet (Beta vulgaris `Cylindra' and `Early Wonder'), seedling height and leaf area in spinach (Spinacia oleracea `Long Standing Bloomsdale'), lettuce (Lactuca sativa ``Red Salad Bowl Everest') and `Savoy' cabbage, and seedling height in `Chinese Tip Top' cabbage and lettuce (`Saladin'). `Winterton' cabbage was not affected. UV-B radiation decreased leaf area and leaf fresh weight in common chickweed (Stellaria media) and corn spurry (Spergula arvensis) and seedling height in green foxtail (Setaria viridis) and redroot pigweed (Amaranthus retroflexus). Tillering was stimulated in response to UV-B in green foxtail. There was no effect of UV-B on lady's-thumb (Polygonum persicaria) growth. Leaf number was not affected by exposure to UV-B in any species. The differential morphological sensitivity of vegetable and weed seedlings may result in altered competitive relationships under enhanced UV-B levels expected with the depletion of the earth's ozone layer.

Is NPA and Stock Return Related: An Empirical Study of Back Testing Model

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Madhvi . ◽  
Amit Gautam ◽  
Amit Srivastava
Keyword(s):  
Data Analysis ◽  
Panel Data ◽  
Stock Price ◽  
Panel Data Analysis ◽  
Negative Relationship ◽  
Share Price ◽  
Correlation Studies ◽  
Back Testing ◽  
Trading Model ◽  
The Relationship

This paper examines the relationship between NPA announcements by banks and the impulsive movement in stock price brought out by these announcements. Primary focus of this study is to determine whether we can create a swing trading model based on back testing the data for the banking stocks listed on the Indian bourses.To achieve this objective we created a databasespanning ten years (2006 to 2016) and collected the daily share prices of eight banks listed on Bombay Stock Exchange (BSE). The relationship between share price and changes in NPA is studied on the basis of correlation studies and panel-data analysis. Although correlation studies does not establish any significant relationship, but the result of panel-data analysis clearly shows a negative relationship between the two. The result is further utilized to develop swing trading model and get benefit out of it. The novelty of the present study is that it clearly guides the swing traders as to how to earn benefit because of fluctuations in share price due to announce of NPA result.

Corporate Social Responsibility and Financial Reporting Quality:Evidence from Restatements

2020 ◽  
Author(s):  
Yi-Hung Lin ◽  
Hua-Wei (Solomon) Huang ◽  
Mark E. Riley ◽  
Chih-Chen Lee
Keyword(s):  
Financial Reporting ◽  
Negative Relationship ◽  
Reporting Quality ◽  
Financial Statements ◽  
Financial Statement ◽  
Financial Reporting Quality ◽  
Csr Reporting ◽  
Corporate Social ◽  
Reporting Environment ◽  
The Relationship

We find a negative relationship between aggregate CSR scores and the probability that firms restated financial statements over the period 1991-2012. We then break that period into three sub-periods in order to determine whether the relationship holds for all three sub-periods. During the sub-periods of 1991-2001 and 2002-2005, the negative CSR score - restatement probability relationship holds. The negative relationship disappears in the 2006-2012 sub-period. Additional analyses indicate CSR scores are significantly higher in the 2006-2012 sub-period, suggesting the disappearance of the relationship between aggregate CSR scores and financial statement quality may relate to changes in CSR assessments and the CSR reporting environment. Our findings update the literature linking CSR scores and financial reporting quality and identify the need for further research as to the reasons the link between these constructs disappeared.

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