DEVELOPMENTAL VARIABILITY AMONG LABORATORY REARED BALSAM WOOLLY APHID (HEMIPTERA: CHERMIDAE)

1972 ◽  
Vol 104 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Michael D. Atkins
Keyword(s):  
First Generation ◽  
Temperature Cycling ◽  
The Other ◽  
Entire Group ◽  
Fluctuating Temperature ◽  
Complete Development ◽  
Woolly Aphid ◽  
Time Required ◽  
Ecological Races ◽  
Constant And Fluctuating Temperature

AbstractNeosistentes reared from eggs of the final generation of the year only developed under a regime of fluctuating temperature. Progeny of the first generation the following spring developed under both constant and fluctuating temperature. In addition, the latter group displayed developmental variability that might provide a basis from which distinct ecological races could develop. Those individuals that developed rapidly showed little variability in the time required to complete development. On the other hand, those that developed slowly displayed more variability. There was no evidence of two distinct developmental groups among individuals reared under a regime of temperature cycling between 55°F and 75°F as the entire group developed rapidly; this treatment also produced the lowest mortality.

The Image of the Hasmoneans: A New Perspective

2018 ◽  
Author(s):  
Vered Noam
Keyword(s):  
First Generation ◽  
Second Temple ◽  
The Other ◽  
Three Generations ◽  
The Creation ◽  
New Perspective ◽  
The One

In attempting to characterize Second Temple legends of the Hasmoneans, the concluding chapter identifies several distinct genres: fragments from Aramaic chronicles, priestly temple legends, Pharisaic legends, and theodicean legends explaining the fall of the Hasmonean dynasty. The chapter then examines, by generation, how Josephus on the one hand, and the rabbis on the other, reworked these embedded stories. The Josephan treatment aimed to reduce the hostility of the early traditions toward the Hasmoneans by imposing a contrasting accusatory framework that blames the Pharisees and justifies the Hasmonean ruler. The rabbinic treatment of the last three generations exemplifies the processes of rabbinization and the creation of archetypal figures. With respect to the first generation, the deliberate erasure of Judas Maccabeus’s name from the tradition of Nicanor’s defeat indicates that they chose to celebrate the Hasmonean victory but concealed its protagonists, the Maccabees, simply because no way was found to bring them into the rabbinic camp.

Immunochemical Studies on Antithrombin III

1979 ◽  
Author(s):  
E.J. McKay
Keyword(s):  
Antithrombin Iii ◽  
The Other ◽  
Antigenic Determinants ◽  
Immunochemical Analysis ◽  
Paradoxical Effect ◽  
Test Protocol ◽  
Agar Gel ◽  
High Affinity ◽  
Time Required ◽  
Antigen Antibody

Depressed Antithrombin III (AT) levels Increase thrombic tendency in man, therefore value in assaying this protein has been established. Immunochemical analysis of AT in clinical disease has however proved controversial, consequently systematic studies were undertaken to rationalize the requirements necessary to optimise these methods in particular electro-Immunoassay. The known binding affinity of AT for heparin has been exploited to differentiate high affinity AT from its inhibitor - protease complexes and has resulted in reports stating that heparin added to the agar gel prior to electrophoresis significantly reduces the time required for completion of antigen/antibody complexes. Our studies however have demonstrated that the antibody required for quantitative analysis must be capable of not only reacting with “native” antigenic determinants of AT but also with “neo” antigens that are exposed when inhibitor-protease complexes are formed. Heparin should not be used in the test protocol, for it has a paradoxical effect on Immunopreclpltation in gels, masking some antigenic determinants of unbound - high affinity AT on one hand, and appear to disrupt the Immunoprecipitin “rocket” formed with the inhibitor-protease complexes during electrophoresis on the other.

Long Time Coming: Prospects for Democracy in Iraq

2009 ◽  
Vol 33 (4) ◽  
pp. 115-148 ◽  
Author(s):  
Bruce E. Moon
Keyword(s):  
Nineteenth Century ◽  
The Other ◽  
Democratic Transitions ◽  
Quarter Century ◽  
The Past ◽  
Political Experience ◽  
Long Time ◽  
Time Required ◽  
Established Democracies

Prospects for democracy in Iraq should be assessed in light of the historical precedents of nations with comparable political experiences. Saddam Hussein's Iraq was an unusually extreme autocracy, which lasted an unusually long time. Since the end of the nineteenth century, only thirty nations have experienced an autocracy as extreme as Iraq's for a period exceeding two decades. The subsequent political experience of those nations offers a pessimistic forecast for Iraq and similar nations. Only seven of the thirty are now democratic, and only two of them have become established democracies; the democratic experiments in the other five are still in progress. Among the seven, the average time required to transit the path from extreme autocracy to coherent, albeit precarious, democracy has been fifty years, and only two have managed this transition in fewer than twenty-five years. Even this sober assessment is probably too optimistic, because Iraq lacks the structural conditions that theory and evidence indicate have been necessary for successful democratic transitions in the past. Thus, the odds of Iraq achieving democracy in the next quarter century are close to zero, at best about two in thirty, but probably far less.

scholarly journals Increased take-off level in automatic milking systems – effects on milk flow, milk yield and milking efficiency at the quarter level

2018 ◽  
Vol 86 (1) ◽  
pp. 85-87 ◽  
Author(s):  
Sabine Ferneborg ◽  
Måns Thulin ◽  
Sigrid Agenäs ◽  
Kerstin Svennersten-Sjaunja ◽  
Peter Krawczel ◽  
...  
Keyword(s):  
Flow Rate ◽  
The Other ◽  
Mean Flow ◽  
Flow Rates ◽  
Decline Phase ◽  
Flow Profiles ◽  
Milk Flow ◽  
Automatic Milking ◽  
Automatic Milking Systems ◽  
Time Required

AbstractThis research communication describes how different detachment levels (0.48, 0.3 and 0.06 kg milk/min) at the quarter-level affect milk flow profiles and overall milking efficiency in automatic milking systems. We hypothesized a higher detachment level would result in greater mean flow rates without affecting the volume of harvested milk per cow during 24 h compared to lower detachment levels. The data suggest milk flow decreased to a rate below the overmilking limit within the 6-s delay time required for termination in all treatments, but the duration of overmilking was shorter for the greatest detachment level compared to the other treatments. We conclude that setting a detachment level at a greater milk flow rate reduces the duration of overmilking without affecting the amount of milk harvested when applied to cows in mid-lactation during quarter-level milking. We also suggest that the steepness of the decline phase of the milk flow curve might have a larger effect than the actual detachment level on the duration of overmilking.

scholarly journals The effect of a lack of uncapped brood on social interactions between honey bee workers and the queen

Apidologie ◽  
2021 ◽  
Author(s):  
Sylwia Łopuch ◽  
Adam Tofilski
Keyword(s):  
Social Interactions ◽  
Honey Bee ◽  
Honey Bees ◽  
High Speed ◽  
Egg Production ◽  
Social Contexts ◽  
The Other ◽  
High Speed Camera ◽  
Time Required ◽  
Honey Bee Workers

AbstractVibro-acoustic communication is used by honey bees in many different social contexts. Our previous research showed that workers interact with their queen outside of the swarming period by means of wing-beating behaviour. Therefore, the aim of this study was to verify the hypothesis that the wing-beating behaviour of workers attending the queen stimulates her to lay eggs. The behaviour of workers and the queen was recorded using a high-speed camera, at first in the presence of uncapped brood in the nest and then without one. None of the queens performed wing-beating behaviour. On the other hand, the workers attending the queen demonstrated this behaviour two times per minute, on average, even in the presence of uncapped brood in the nest. After removing the combs with the uncapped brood, the incidence of wing-beating behaviour increased significantly to an average of four times per minute. Wing-beating behaviour did not differ significantly in its characteristics when uncapped brood was present or absent in the nest. During 3 days after removing the combs with the uncapped brood, there was no significant increase in the rate of egg lying by the queen. Therefore, the results presented here do not convincingly confirm that the wing-beating behaviour of workers affects the rate of queen's egg-lying. This negative result can be related to colony disturbance and longer time required by the queen to increase egg production.

Effect of constant and fluctuating temperature on daily melatonin production by eyecups from Rana perezi

1997 ◽  
Vol 167 (3) ◽  
pp. 221-228 ◽  
Author(s):  
A. I. Valenciano ◽  
M. Alonso-Bedate ◽  
M. J. Delgado ◽  
A. L. Alonso-G�mez
Keyword(s):  
Fluctuating Temperature ◽  
Melatonin Production ◽  
Constant And Fluctuating Temperature ◽  
Rana Perezi

Do Students of Noncollege-Educated Parents Achieve Less Academically Than Students of College-Educated Parents?

1999 ◽  
Vol 85 (2) ◽  
pp. 417-421 ◽  
Author(s):  
Carlos P. Zalaquett
Keyword(s):  
Grade Point Average ◽  
Minority Students ◽  
First Generation ◽  
College Experience ◽  
The Other ◽  
Retention Rates ◽  
First Generation Students ◽  
Grade Point ◽  
Retention Characteristics ◽  
College Educated

The ethnicity, grade point average (GPA), and retention characteristics of 202 students whose parents never attended college, 244 students whose parents had some college experience, and 394 students whose parents graduated from college were examined. Analysis showed that a significantly higher percentage of minority students were first-generation students. No significant differences were found between the GPA and retention rates of first-generation students and those of the other two.

THE ROLE OF LIGHT IN THE FRUITING OF PANUS FRAGILIS

1967 ◽  
Vol 45 (11) ◽  
pp. 1939-1943 ◽  
Author(s):  
Orson K. Miller Jr.
Keyword(s):  
Temperature Cycle ◽  
Light Cycle ◽  
Fluctuating Temperature ◽  
Time Required ◽  
Role Of Light ◽  
Pink Pigment

The role of light in the fruiting of Panus fragilis was explored under controlled temperature and light cycles. No fruiting occurred in the absence of light. A daily light cycle of 1.5 h at 792 ft-c was sufficient to produce fruiting initials, but not mature sporophores. Only at the longest daily light cycle tested, 12 h at 792 ft-c, were mature sporophores produced. The time required was 22–31 days with a daily fluctuating temperature cycle of 22 °C for 12 h followed by 8 °C for 12 h. The development of a pink pigment associated with fruiting initials and young sporophores was strongest at the longer light cycles and almost absent in the short cycles.

EFFECT OF LATITUDE ON THE CRITICAL PHOTOPERIOD FOR DIAPAUSE INDUCTION IN THE BERTHA ARMYWORM, MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)

1983 ◽  
Vol 115 (8) ◽  
pp. 1039-1042 ◽  
Author(s):  
B. M. Hegdekar
Keyword(s):  
Temperature Regime ◽  
Diapause Induction ◽  
The Other ◽  
Fluctuating Temperature ◽  
Mamestra Configurata ◽  
Ambient Temperatures ◽  
Critical Photoperiod ◽  
Lepidoptera Noctuidae ◽  
H 20 ◽  
Bertha Armyworm

AbstractThe critical photoperiod for diapause induction in pupae of Mamestra configurata Walker in Manitoba was 16 h 06 min at Glenlea (49°38′ N), 16 h 20 min at Grandview (51°10′ N), and 16 h 42 min at Birch River (52°24′ N). The differences in cirtical photoperiods observed at Glenlea and Grandview were not significant. At least two different photoperiods exist, one in the Glenlea and Grandview areas and the other in the Birch River area. In the laboratory, the critical photoperiod was 13.5 h when larvae were exposed to a daily fluctuating temperature regime of 12 h at 25 °C and 12 h at 10 °C. Longer critical photoperiods found for the field populations may be related to the relatively low ambient temperatures to which the larvae were exposed in field cages.

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