Showing papers by "University of New Brunswick published in 1978"
100 citations
TL;DR: Female eastern spruce budworm moths respond to the synthetic sex pheromone of their own species by walking, antennal grooming, flexation of the body, extension of the ovipositors, and oviposition.
Abstract: Female eastern spruce budworm moths respond to the synthetic sex pheromone of their own species (a mixture ofcis- andtrans-11-tetradecenal) by walking, antennal grooming, flexation of the body, extension of the ovipositors, and oviposition. The sex pheromone is perceived by receptors on the antennae. Electroantennogram responses from the female are approximately two-thirds the amplitude of those obtained from males.
77 citations
TL;DR: In this paper, the authors evaluated hypothetical male and female applicants for managerial positions and found that half required supervision of predominately female subordinates; half the supervision of predominantly male sub-masters.
Abstract: Subjects evaluated hypothetical male and female applicants for managerial positions. Half required supervision of predominately female subordinates; half the supervision of predominately male subor...
73 citations
TL;DR: This paper presents a parametric approach for solving the shortest path problem between two specified nodes in a general network and the similarity of this approach to that of the generalized Lagrange multiplier technique is demonstrated.
Abstract: The shortest path problem between two specified nodes in a general network possesses the unimodularity property and, therefore, can be solved by efficient labelling algorithms. However, the introduction of an additional linear constraint would, in general, destroy this property and the existing algorithms are not applicable in this case. This paper presents a parametric approach for solving this problem. The algorithm presented would require, on the average, a number of iterations which is polynomially bounded. The similarity of this approach to that of the generalized Lagrange multiplier technique is demonstrated and a numerical example is presented.
72 citations
TL;DR: At low temperatures, psychrotrophic P. fluorescens oxidized glucose to extracellular 2-KG, while growing on preferred carbon sources, whilegrowing on preferredcarbon sources.
Abstract: Growth of Pseudomonas fluorescens in batch culture with glucose and organic acids resulted in typical diauxic responses at 30 degrees C but no detectable diauxic lag at 5 degrees C. At 30 degrees C, organic acids were preferentially utilized during the first growth phase. Glucose utilization was delayed until onset of the second growth phase. Systems involved in direct uptake and catabolism of glucose responded in a manner compatible with repression by malate and/or its metabolites and induction by glucose and/or its metabolites. The oxidative non-phosphorylated pathway, through gluconate and 2-ketogluconate (2-KG) as intermediates, was not induced during either growth phase. At 5 degrees C, growth with glucose and organic acids was biphasic but without diauxic lag. Organic acids were preferentially utilized during the first growth phase. Although carbon from glucose was not fully catabolized until onset of the second growth phase, glucose was oxidized to and accumulated extracellularly as gluconate and 2-KG during the first growth phase. No significant repression of glucose-catabolizing enzymes was observed during growth with organic acids in the presence of glucose. However, uptake activities for gluconate and 2-KG did not increase significantly until onset of the second growth phase. Thus, at low temperatures, psychotrophic P. fluorescens oxidized glucose to extracellular 2-KG, while growing on preferred carbon sources. The 2-KG was then catabolized after depletion of the organic acid.
40 citations
TL;DR: In this article, the authors examined over a two-year period in four jack pine stands aged 16, 29, 49 and 57 years and four mixed hardwood stands aged 7, 17, 20 and 29 years.
Abstract: Biomass and nutrient transfer (N, P, K, Ca, Mg) of overstory (branches and leaves) and understory litter fall were examined over a two year period in four jack pine stands aged 16, 29, 49 and 57 years and four mixed hardwood stands aged 7, 17, 20 and 29 years. Relative amounts of the five nutrients in litter fall for both series of stands were N > K ≷ Ca > P = Mg. Return of mineral elements to the forest floor was generally twice as high on the hardwood stands as for similarly aged pine stands. Overall return of nutrients plotted versus stand age generally exhibited a plateau relationship, with relatively little difference among stands; however, some exceptions occurred. Understory contribution to litter fall was very important on these stands, since in most cases the nutrient mass in understory litter was usually similar to or higher than that from the tree layer. Data on forest floor biomass, nutrient distribution and turnover rates of these stands were also presented; mobility of nutrients in the forest floor was in the order K > Mg ≥ P ≥ Ca ≥ N.
32 citations
TL;DR: In this paper, a cw dye laser, tunable in the region 570-620 nm, has been used to excite photoluminescence in the A2Π-X2Σ+ system of the YO molecule.
31 citations
TL;DR: A novel type of pore canal is described from the cuticle of three species of Gammarus, which passes from the epidermis vertically through the endocuticle and exocuticles, and in the most distal layers of the latter is slightly expanded.
Abstract: A novel type of pore canal is described from the cuticle of three species of Gammarus. Each canal passes from the epidermis vertically through the endocuticle and exocuticle, and in the most distal layers of the latter is slightly expanded. Before entering the epicuticle the canal narrows, forming a neck the base of which is encircled by an electron-dense collar. Several tubular structures arise from the collar and pass distally into the reticular innermost regions of the epicuticle. Within the neck and just below its opening at the cuticle surface, a rod-like structure is inserted; this protrudes a short distance from the pore. Each pore canal is connected to many necks; the openings of the latter are aligned in rows over the surface, the openings and rows being about 0.15 and 1.0 μm apart, respectively. Changes in the pore and canal contents are visible and their significance is discussed.
30 citations
TL;DR: In this paper, a linear mathematical model is designed to evaluate the effect of atmospheric temperature and pressure variations, river discharge, long periodic tides and Chandlerian motion on vertical crustal movements.
28 citations
TL;DR: In this article, chemical and textural data for rapakivi granites are combined with experimentally determined phase equilibria to provide constraints on the growth of mantled feldspars by a pressure quench mechanism.
Abstract: Chemical and textural data for rapakivi granites are combined with experimentally determined phase equilibria to provide constraints on the growth of mantled feldspars by a pressure quench mechanism. In water saturated melts of granitic composition the mantled texture develops in response to a decrease in pressure of as little as 1–0.5 kbar. In water undersaturated melts a similar mechanism is operable over a wider range of pressures and a restricted range of water contents. Water undersaturated granites containing 6–10 wt % water undergoing a change in pressure from 5–2 kbar will develop mantling as will a more calcic granodiorite containing 1–5wt% water undergoing a pressure change from 10-1 kbar. The mantling process is interpreted as a reflection of the reduction of pressure accompanying the emplacement of a magma.
28 citations
TL;DR: Electrophysiological recordings confirmed the ability of Monochamus notatus to detect at least six terpenes, and showed that the sensilla basiconica are olfactory receptors for these compounds.
Abstract: Electrophysiological recordings confirmed the ability ofMonochamus notatus to detect at least six terpenes, and showed that the sensilla basiconica are olfactory receptors for these compounds. There was no correlation between the degree of behavioral activity and the response of the sensory cells to terpenes. No odor specialists were found. A wide range of response spectra of the sensilla basiconica were recorded. One sense cell has acceptors for both limonene and pinene.
TL;DR: In this paper, the lifetime of the C 3 Δ state of TiO has been measured for vibrational levels v = 0 to 2 from the decay of photoluminescence excited in a chemiluminescent flame by a short-pulsed (5 nsec) tunable dye laser.
TL;DR: The microwave spectra of CH 2 and CH 2 35 Cl were observed and lines assigned to the gauche form in this paper, and the rotational constants in MHz and distortion constants in KHz were reported.
TL;DR: The composition of monoterpene hydrocarbons and water content of freshly felled white pine logs (unattractive toMonochamus for oviposition) was compared to that of the same logs after aging long enough to become attractive to Monochamus.
Abstract: The composition of monoterpene hydrocarbons and water content of freshly felled white pine logs (unattractive toMonochamus for oviposition) was compared to that of the same logs after aging long enough to become attractive toMonochamus. No significant differences were found. Variations between trees was the greatest source of variance in the data. If monoterpenes are used in host selection they are probably used to locate the host species and not to identify logs suitable for oviposition.
TL;DR: In this article, both positive and negative ion-molecule reactions of alkyl nitrites have been examined using the techniques of ion cyclotron resonance spectroscopy and the proton affinities of each of the nitrites studied have been determined and compared to the gas phase basicities of the corresponding alcohols.
TL;DR: Liver tyrosine aminotransferase activity and liver glycogen levels were significantly depressed in maturing female yearling brook trout (Salvelinus fontinalis Mitchill) compared to those in male or immature fish.
Abstract: 1. 1. Liver tyrosine aminotransferase (TAT) activity and liver glycogen levels were significantly depressed in maturing female yearling brook trout (Salvelinus fontinalis Mitchill) compared to those in male or immature fish. 2. 2. TAT and glycogen levels in liver were significantly lowered in immature brook trout of either sex after injection with estradiol-17β, 4 mg per 100 g body weight.
TL;DR: In this paper, the absorption spectrum of the PO molecule in the region 2100 to 1550 A has been studied in detail at high resolution, and a number of new electronic states have been discovered.
TL;DR: In this article, the dynamic performance of the static excitation system of a large fossil-fired thermal generating station is explored by considering the case of the unit connected to an equivalent system.
Abstract: The dynamic performance of the static excitation system of a large fossil-fired thermal generating station is explored by considering the case of the unit connected to an equivalent system.
TL;DR: In this paper, a detailed study of cylindrical shear waves in inhomogeneous Maxwellian viscoelastic materials whose parameters depend continuously on a single radial coordinate is presented.
Abstract: A detailed study is presented of cylindrical shear waves in inhomogeneous Maxwellian viscoelastic materials whose parameters depend continuously on a single radial coordinate. A formal asymptotic technique is employed to investigate various impact problems. Rigorous arguments are then used to show that the formal technique gives results that are asymptotic to the exact solution even when boundaries or interfaces are present. Simple termination in the Karal-Keller series is shown to be associated with the Baecklund transformation method.
TL;DR: The microwave spectrum of two chlorine isotopic species of epichlorohydrin (CH 2 OCH CH 2 Cl) is reported in this paper.
TL;DR: A comparison of analytic and experimental results is presented, based on average error probability criteria, and the design of a three-state myoelectric control is included using digital circuitry.
Abstract: An e.m.g. processor is described which estimates the probability that the e.m.g. signal exceeds a certain threshold. A comparison of analytic and experimental results is presented, based on average error probability criteria. The design of a three-state myoelectric control is included using digital circuitry.
TL;DR: Early design of the myoelectric control systems was empirical, but recent work has provided some theoretical basis for predicting their performance, which should lead to improvements in existing systems and make feasible the development of more complex prostheses.
Abstract: A myoelectric control system is one in which the operation of a device is controlled by the electric potential produced by voluntary contraction of a muscle. These systems have been used mainly for the control of artificial limbs. Early design of the control systems was empirical, but recent work has provided some theoretical basis for predicting their performance. This should lead to improvements in existing systems and make feasible the development of more complex prostheses.
TL;DR: In this article, the wavefunctions for the two lowest 3 − r states of NH, A 3 r and 3 r r, have been calculated over a wide range of internuclear distances, using a recently developed MC method for excited states in conjunction with a systematic selection of configurations.
TL;DR: G. oceanicus can regulate in hyposaline sea water and reached a new steady state after 4 h exposure to 3%.
Abstract: Specimens ofGammarus oceanicus were exposed to sea water at salinities of 3%. and 55%. for various periods of time up to 24 h.G. oceanicus can regulate in hyposaline sea water and reached a new steady state after 4 h exposure to 3%. sea water. Its ability to regulated in hypersaline conditions is limited and no animals survived longer than 6–8 h in 55%. sea water. These results are discussed with respect to salinity conditions in the intertidal zone.
TL;DR: In this article, the effect of aqueous solutions of polyox WSR 301, Separan AP-30 and carboxymethylcellulose on the rate of mass transfer from rotating cylinders was investigated.
TL;DR: It is concluded that the Doppler approach is indeed feasible, but that the use of a high-resolution pulsed system capable of separating multiple targets is only possible in a channel width of a few meters.
Abstract: In the course of monitoring and evaluating fish population in the seas, sonar systems have proved a practical and efficient measurement approach. The results obtained, however, from the use of sonar for monitoring fish migration in rivers have been somewhat disappointing-the most troublesome problems being the inability to recognize invalid targets. It has been proposed [1] that a high-resolution Doppler sonar which recognizes a valid target on the basis of its Doppler signature would be a solution to this problem. This paper examines the feasibility of such a target identification scheme. In particular, an examination is made of the nature of returns to be expected from a fish, and of interference sources-principally surface reverberation. From this it is concluded that the Doppler approach is indeed feasible, but that the use of a high-resolution pulsed system capable of separating multiple targets is only possible in a channel width of a few meters.
TL;DR: In this paper, the authors examined the Late Devonian faunal and facies relationships in seven around the North Atlantic region, in eastern North America, Greenland, western Europe and northwest Africa.
TL;DR: In this paper, the authors presented a picture of the energy history of an expanding industrial country and presented data on energy consumption and energy sources in Canada since confederation in 1867.
TL;DR: In this paper, trends in industrial relations research in Australia over the past twenty years, particularly as reflected in the pages of The Journal of Industrial Relations, are examined, and a comparison with parallel developments in American research interests is presented so as to better elicit the evolving local pattern.
Abstract: Trends in industrial relations research in Australia over the past twenty years, particularly as reflected in the pages of The Journal of Industrial Relations, are examined. A comparison with parallel developments in American research interests is presented so as to better elicit the evolving local pattern. This comparison reveals a number of surprising gaps in Australian research. A common problem uncovered in both countries is a certain lack of imagina tion and innovation in the subject matter of research as a consequence of being towed in the wake of public policy. Although research practices will, of necessity, follow the headlines, it is argued that there is also need for a less "pragmatic", less status quo oriented strand of research. Such research would attempt to trace the underlying premises of the industrial relations system, a by-product of which, in addition to producing work of long-term theoretical significance, might be the ability of researchers to influence public policy. The role played ...