EFFECT OF LOW TEMPERATURES ON MORTALITY OF GRASSHOPPER EGGS (ORTHOPTERA: ACRIDIDAE)

1988 ◽  
Vol 120 (12) ◽  
pp. 1147-1148 ◽  
Author(s):  
M.K. Mukerji ◽  
M.P. Braun
Keyword(s):  
Low Temperatures ◽  
Quantitative Data ◽  
Canadian Prairies ◽  
Egg Mortality ◽  
Winter Temperatures ◽  
The Relationship

Mortality of grasshopper eggs on the Canadian prairies is brought about by many factors, including winter temperatures. Although several authors (Parker 1930; Pickford 1966, 1976; Riegert 1967) have reported that winter temperatures can affect the mortality of grasshopper eggs, no quantitative data have been presented. This note reports the relationship between low temperatures and grasshopper egg mortality

Learning Language Levels in Students Accurate with a History Academic Achievement History

2017 ◽  
Vol 1 (2) ◽  
pp. 137
Author(s):  
Noorlela Binti Noordin ◽  
Abdul Razaq Ahmad ◽  
Anuar Ahmad
Keyword(s):  
Academic Achievement ◽  
Statistical Inference ◽  
Quantitative Data ◽  
Quantitative Methods ◽  
Descriptive Statistics ◽  
Language Test ◽  
The Subject ◽  
The Difference ◽  
Learning Language ◽  
The Relationship

This study was aimed to evaluate the Malay proficiency among students in Form Two especially non-Malay students and its relationship to academic achievement History. To achieve the purpose of the study there are two objectives, the first is to look at the difference between mean of Malay Language test influences min of academic achievement of History subject among non-Malay students in Form Two and the second is the relationship between the level of Malay proficiency and their academic achievement for History. This study used quantitative methods, which involved 100 people of Form Two non-Malay students in one of the schools in Klang, Selangor. This study used quantitative data were analyzed using descriptive statistics and statistical inference with IBM SPSS Statistics v22 software. This study found that there was a relationship between the proficiency of Malay language among non-Malay students with achievements in the subject of History. The implications of this study are discussed in this article.

War of words: the impact of Russian state television on the Russian Internet

2015 ◽  
Vol 43 (4) ◽  
pp. 533-555 ◽  
Author(s):  
Christina Cottiero ◽  
Katherine Kucharski ◽  
Evgenia Olimpieva ◽  
Robert W. Orttung
Keyword(s):  
World War Ii ◽  
Quantitative Data ◽  
The Internet ◽  
Strong Impact ◽  
World War ◽  
Search Query ◽  
Internet Users ◽  
Russian State ◽  
The Impact ◽  
The Relationship

How effective is Russian state television in framing the conflict in Ukraine that began with the Euromaidan protests and what is its impact on Russian Internet users? We carried out a content analysis of Dmitrii Kiselev's “News of the Week” show, which allowed us to identify the two key frames he used to explain the conflict – World War II-era fascism and anti-Americanism. Since Kiselev often reduces these frames to buzzwords, we were able to track the impact of these words on Internet users by examining search query histories on Yandex and Google and by developing quantitative data to complement our qualitative analysis. Our findings show that much of what state media produces is not effective, but that the “fascist” and anti-American frames have had lasting impacts on Russian Internet users. We argue that it does not make sense to speak of competition between a “television party” and an “Internet party” in Russia since state television has a strong impact in setting the agenda for the Internet and society as a whole. Ultimately, the relationship between television and the Internet in Russia is a continual loop, with each affecting the other.

Introduced North American Black Henbane (Hyoscyamus niger) Populations are Biennial

2014 ◽  
Vol 7 (4) ◽  
pp. 624-630 ◽  
Author(s):  
Christa E. Fettig ◽  
Ruth A. Hufbauer
Keyword(s):  
North American ◽  
Common Garden ◽  
Hyoscyamus Niger ◽  
Active Growth ◽  
Black Henbane ◽  
Introduced Populations ◽  
Winter Temperatures ◽  
American Black ◽  
The Relationship ◽  
Bolting And Flowering

AbstractBlack henbane can be either annual or biennial. We investigated which life cycle is found in four introduced western North American populations. Plants were grown in a greenhouse common garden until half were vernalized by exposure to natural winter temperatures, while the other half remained in the greenhouse above 20 C, with 16 h of light and 8 h of dark. In total the plants were monitored 313 d after germination. We measured whether plants bolted, the time it took for bolting to commence, and the size at bolting. All vernalized plants bolted after 117 d of active growth (within 26 d of the end of the vernalization treatment), whereas only 26% of the nonvernalized plants bolted after an average of 278 d of active growth. Vernalized plants bolted at a smaller size than the nonvernalized plants that bolted (28 vs. 41 leaves on average). In the nonvernalized plants, the relationship between time to bolting and size was strong, but not so with the vernalized plants. Our results indicate that introduced black henbane plants are biennial, and that vernalization is more critical to bolting and flowering than reaching a certain size. Nonetheless, the fact that nonvernalized plants were capable of bolting if grown long enough suggests that vernalization is not the only cue that can trigger reproduction in introduced populations.

THE LIFE HISTORY OF LESTES CONGENER (ODONATA: ZYGOPTERA) ON THE CANADIAN PRAIRIES

1974 ◽  
Vol 106 (4) ◽  
pp. 367-376 ◽  
Author(s):  
W. W. Sawchyn ◽  
C. Gillott
Keyword(s):  
Life History ◽  
Embryonic Development ◽  
Larval Development ◽  
Sexual Maturation ◽  
Low Temperatures ◽  
Canadian Prairies ◽  
History Of

AbstractLestes congener Hagen overwinters in the egg stage. There is a diapause just before blastokinesis, during which the egg is extremely resistant to low temperatures and desiccation. Post-diapause embryonic development can occur near 0 °C but will not take place until the eggs are wetted as the pond habitat fills in the spring. Hatching does not occur until the temperature exceeds about 5 °C and is highly synchronous. Larval development is rapid and is completed in the field in about 50 days. Emergence of the adults also is synchronous. Sexual maturation requires 3 weeks. Oviposition occurs immediately after copulation while the pair are still in tandem. It takes place only in dry stems of Scirpus. Adaptations of L. congener for life under rigorous prairie conditions are discussed.

Boards of Governors' Roles and Management of Government Aided Secondary Schools in Kyenjojo District, Uganda

2018 ◽  
Vol 1 (2) ◽  
pp. 138-150
Author(s):  
Hellen Kabasinguzi Wataba ◽  
Nafiu Lukman Abiodun
Keyword(s):  
Secondary Schools ◽  
Significant Relationship ◽  
Quantitative Data ◽  
Qualitative Data ◽  
Head Teachers ◽  
Correlational Research ◽  
Interview Guide ◽  
Major Predictor ◽  
And Control ◽  
The Relationship

This study sought to establish the relationship between boards of governors' (BOGs) roles and management of government aided secondary schools in Kyenjojo District. The objectives were to establish the relationship between BOGs' planning role and management of government aided secondary schools, to establish the relationship between BOGs' supervisory role and management of government aided secondary schools, to establish the relationship between BOGs' control role and management of government aided secondary schools; and to determine the major predictor of management of government aided secondary schools out of the three aspects of BOGs' roles. A correlational research design was used. A total of 90 respondents drawn from 108 BOGs and nine head teachers were selected as sample for the study using stratified random sampling and census inquiry respectively. The instruments used were questionnaire and interview guide. Quantitative data was analysed using Pearson product-moment correlation and regression, while thematic analysis was used on qualitative data. The study found a statistically moderate positive and significant relationship between BOGs' planning role and management of government aided secondary schools (r=.626, p=.000); a statistically moderate positive and significant relationship between BOGs' supervisory role and management of government aided secondary schools(r=.591, p=.000); and a statistically weak positive and significant relationship between BOGs' control role and management of government aided secondary schools(r=.280, p=.015). All the three aspects of BOGs roles account for 38.4% of the influence on management of government aided secondary schools in Kyenjojo district (adjusted r2=0.384, p=.000). The researchers recommend that BOGs should be well trained in management of schools in order to be effective in their work. Head teachers should not be dictators but create a conducive climate for planning, supervision and control by the BOGs.

Modeling the Growth of Salmonella in Cut Red Round Tomatoes as a Function of Temperature

2010 ◽  
Vol 73 (8) ◽  
pp. 1502-1505 ◽  
Author(s):  
WENJING PAN ◽  
DONALD W. SCHAFFNER
Keyword(s):  
Mathematical Model ◽  
Growth Rates ◽  
Low Temperatures ◽  
Safety Concern ◽  
Time Intervals ◽  
Salmonella Serotypes ◽  
Increasing Temperature ◽  
Incubation Temperatures ◽  
Raw Poultry ◽  
The Relationship

Tomato-associated Salmonella outbreaks have recently become a significant food safety concern. Temperature abuse of cut tomatoes may have played a role in some of these outbreaks. The purpose of this study was to develop a mathematical model to describe the growth of Salmonella on cut tomatoes at various temperatures. Four Salmonella serotypes (Typhimurium, Newport, Javiana, and Braenderup) obtained from previous tomato-linked cases of salmonellosis were used in this study. These four serotypes were cultured separately, combined into a cocktail, and inoculated onto whole red round tomatoes and allowed to dry overnight. The tomatoes were then cut into pieces and incubated at a predetermined range of temperatures (10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30, and 35°C). Salmonella concentration was measured at specified time intervals to determine the growth curve for Salmonella on cut tomatoes at each temperature. The growth rates were calculated using DMFit and used to build a mathematical model to illustrate the relationship between the growth rates of Salmonella on tomatoes and incubation temperatures from 10 to 35°C. The resulting model compared favorably with a Salmonella growth model for raw poultry developed by our laboratory. The Pathogen Modeling Program underpredicted growth at low temperatures and overpredicted growth at high temperatures. ComBase predicted consistently slower growth rates than were observed in tomatoes but showed parallel increases in growth rate with increasing temperature.

Corrigendum - Growth of potatoes (Solanum tuberosum L.) to the small tuber stage as related to soil temperature

1979 ◽  
Vol 30 (4) ◽  
pp. 667
Author(s):  
PJM Sale
Keyword(s):  
Soil Temperature ◽  
Low Temperatures ◽  
Solanum Tuberosum L ◽  
Tuber Initiation ◽  
Degree Days ◽  
Night Temperature ◽  
Field Development ◽  
Periodic Fluctuations ◽  
The Times ◽  
The Relationship

In experiments in a phytotron with potato cv. Sebago and in the field with cvv. Sebago and Sequoia the times for planting to emergence, new tuber initiation and small tuber stage were measured in relation to temperature. Emergence was linearly related to mean temperature and relatively independent of diurnal or periodic fluctuations up to an optimum of 22–24°C, and up to this optimum could be considered as a degree-day requirement calculated from either soil temperature at tuber depth or air temperature. For both cultivars planted with just-visible sprouts this was about 450 degree-days reckoned above a +2° minimum. At temperatures above the optimum, emergence was actively inhibited, and the relationship no longer held when appreciable periods were spent above about 24°. Once emergence had occurred, new tuber initiation and growth to the small tuber stage tended to be promoted at low temperatures especially in cv. Sequoia; phytotron treatments where night temperature was higher than day had a particularly adverse effect. It appeared that field development was adversely affected if a rapid increase in soil temperature occurred during the period of emergence.

scholarly journals The influence of low temperatures on the incidence of sugary disease on sorghum

2006 ◽  
Vol 36 (2) ◽  
pp. 397-403
Author(s):  
Amauri Bogo ◽  
Ricardo Trezi Casa ◽  
Luis Sangoi ◽  
Paulo Tarcísio Domatos Borba
Keyword(s):  
Low Temperatures ◽  
Disease Incidence ◽  
Climatic Conditions ◽  
Male Sterile ◽  
Growing Seasons ◽  
Claviceps Africana ◽  
Sorghum Genotypes ◽  
Fertile Hybrids ◽  
The Relationship ◽  
Increased Susceptibility

The relationship between pre-flowering climatic conditions and sugary disease incidence was quantified in grain and forage sorghum genotypes at two sowing periods (mid November and mid December). The trials were carried out over the 2001/02 and 2002/03 growing seasons, in Lages, Santa Catarina State. Four commercial male-fertile sorghum hybrids (BR 600-forrage, BR 700-grain, BR 701-forage/silage and BR 800-forage) and one male-sterile inbred line (BR 001-A) were evaluated. When each genotype reached the flowering stage, 50 panicles were marked and sprayed with a suspension of Claviceps africana (1,000 spores mL-1). Air temperature, humidity and rainfall were recorded through out the growing cycle. Low temperatures three to four weeks prior to flowering, increased susceptibility. At both sowing periods, average night temperatures lower than 15°C during the critical period of pre-flowering turned the fertile hybrids as susceptible as the male-sterile inbred to ergot infection. The tested hybrids differed in their ability to tolerate pre-flowering cold stress. Seed set in uninoculated heads under pollination bags was also reduced, suggesting that increased susceptibility to sugary disease was the result of low temperature induced sterility.

scholarly journals Effect of similar-to-me effect on job satisfaction and organizational trust

2017 ◽  
Vol 15 (4) ◽  
pp. 254-262
Author(s):  
Ardashir Zahed ◽  
Farzad Sattari Ardabili
Keyword(s):  
Job Satisfaction ◽  
Quantitative Data ◽  
Structural Equation ◽  
Applied Research ◽  
Organizational Trust ◽  
Strong Support ◽  
Public Organizations ◽  
Equation Modeling ◽  
Proposed Model ◽  
The Relationship

The present study intended to investigate the effect of managers’ similar-to-me bias on the job satisfaction and organizational trust between public organizations staff. The current study is a descriptive-correlational applied research with quantitative data collection (questionnaire). The results of structural equation modeling analyses conducted for 80 employees of Public organizations in Ardabil, Iran, offered strong support for the proposed model. The results indicated that there was a statistically significant relationship between similar-to-me effect and job satisfaction; furthermore, organizational trust mediated the relationship between similar-to-me effect and job satisfaction. It is worth noting that there was a positive relationship between organizational trust and job satisfaction.

The function of the sarcoplasmic reticulum is not inhibited by low temperatures in trout atrial myocytes

2001 ◽  
Vol 281 (6) ◽  
pp. R1902-R1906 ◽  
Author(s):  
Leif Hove-Madsen ◽  
Anna Llach ◽  
Lluis Tort
Keyword(s):  
Sarcoplasmic Reticulum ◽  
Low Temperatures ◽  
Experimental Temperature ◽  
Effect Of Temperature ◽  
Fast Time ◽  
Atrial Myocytes ◽  
Patch Clamp Technique ◽  
Two Temperatures ◽  
Perforated Patch Clamp ◽  
The Relationship

The effect of temperature on sarcoplasmic reticulum (SR) Ca2+ uptake and release was measured in trout atrial myocytes using the perforated patch-clamp technique. Depolarization of the myocyte for 10 s to different membrane potentials ( V m) induced SR Ca2+ uptake. The relationship between V m and SR Ca2+ uptake was not significantly changed by lowering the experimental temperature from 21 to 7°C, and the relationship between total cytosolic Ca2+and SR Ca2+ uptake was similar at the two temperatures with a pooled Vmax = 66 amol/pF and K 0.5 = 4 amol/pF. Quantification of the Ca2+ release from the SR elicited by 10-ms depolarizations to different V m showed an increasing SR Ca2+ release at more positive V mbetween −50 and +10 mV, whereas SR Ca2+ release stagnated between +10 and +50 mV. Lowering of the temperature did not affect this relationship significantly, giving an SR Ca2+ release of 1.71 and 1.54 amol/pF at 21 and 7°C, respectively. Furthermore, clearance of the SR Ca2+ content slowed down inactivation of the L-type Ca2+ current at both temperatures (the fast time constant increased significantly from 10.4 ± 1.9 to 15.0 ± 2.0 ms at 21°C and from 38 ± 15 to 73 ± 24 ms at 7°C). Thus the SR has the capacity to remove the entire Ca2+ transient at physiologically relevant stimulation frequencies at both 21 and 7°C, although it is estimated that ∼40% of the total Ca2+ transient is liberated from and reuptaken by the SR with continuous stimulation at 0.5 Hz independently of the experimental temperature.

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