Showing papers by "La Trobe University published in 1971"
TL;DR: A starch gel technique for electrophoresing and detecting the human erythrocytic enzyme is described and Caucasian, Negro and Oriental blood donors are examined and no variants are found.
Abstract: REDUCED activity of the glycolytic enzyme phosphoglycerate kinase (EC 2723 : ATP : 3 phospho-D-glycerate 1 phosphotransferase, PGK) is associated with hereditary haemolytic anaemia1–3. A family study suggests that the gene involved is sex linked. Beutler has described a starch gel technique for electrophoresing and detecting the human erythrocytic enzyme4. He examined Caucasian, Negro and Oriental blood donors and found no variants. We have surveyed several hundred erythrocyte samples from a number of species of kangaroos (Macropodidae) using his technique.
175 citations
TL;DR: Random inactivation of one or other of the X chromosomes in female eutherians could have evolved from an ancestral paternal X inactivation, which has been retained in marsupials.
Abstract: Random inactivation of one or other of the X chromosomes in female eutherians could have evolved from an ancestral paternal X inactivation, which has been retained in marsupials.
140 citations
TL;DR: In this article, the general physics of field-aligned irregularities in the magnetosphere is studied and a specific mechanism for formation of irregularities is proposed, which involves a spatially varying electrostatic field orthogonal to B and operates in conjunction with irregularities of conductivity in the E region, and fieldaligned currents caused by mismatch of conjugate ionospheric potentials.
77 citations
47 citations
TL;DR: The central limit analogue of the central limit is the convergence of the super-critical Galton-Watson branching process to N(0, 1) for a sum S n of independent and identically distributed random variables with mean μ and variance σ 2 as discussed by the authors.
Abstract: Let Z 0 = l, Z 1,Z 2, … denote a super-critical Galton-Watson branching process with 1 0,\left({m^2 - m} \right)^{\frac{1}{2}} \sigma ^{ - 1} Z_n^{ - \frac{1}{2}} m^m \left({W - W_n } \right)\) is asymptotical normal N(0,1) as n →∞ (Heyde [4]). This result is called a central limit analogue by virtue of the analogy with the convergence of \(\sigma ^{ - 1} n^{\frac{1}{2}} \left({\mu - n^{ - 1} S_n } \right)\) to N(0,1) for a sum S n of independent and identically distributed random variables with mean μ and variance σ2.
46 citations
TL;DR: In this article, the authors proposed an experiment to test the theory that Ba+ (a heavy ion) is injected into the auroral ionosphere and the ionization may be sufficient to sustain the ionosphere near the aurora.
43 citations
TL;DR: In this paper, a series of tris(β-diketonato) - (1, M = V, Mn Fe, Ru, Co, Rα ≠ Rγ) and (β-thioketonato)-metal(III) complexes were investigated in order to establish cis-trans isomer distributions and relative rates of isomerization.
36 citations
TL;DR: In Selaginella kraussiana, the species investigated most extensively, the pores were arranged in a manner consistent with the view that each pore was located at the centre of an hexagonal structure lying on the nuclear surface.
Abstract: A study of the structure and arrangement of nuclear pores has been made in a number of species. In Selaginella kraussiana, the species investigated most extensively, the pores were arranged in a manner consistent with the view that each pore was located at the centre of an hexagonal structure lying on the nuclear surface. The significance of this arrangement and some evidence relating to the structure of the pores is discussed. In other species examined, no evidence of a regular arrangement of the pores was observed.
30 citations
TL;DR: Descriptions based on scanning electron microscopy of antennal sensory plaques in a number of families of fulgoroid insects are given and gradation in complexity of form of these plaques is demonstrated.
30 citations
27 citations
TL;DR: In this article, the properties of monothiocarbamato-and monothioxanthato-based analogues of Thallium(I) have been compared.
TL;DR: The results indicate that bursts of peroxisomal synthesis occur during the development of the mouse liver, particularly in the early postnatal stages and during maturation.
Abstract: PEROXISOMES are cytoplasmic organelles which occur in liver and kidney cells of higher animals and in lower forms of life. They have a unique enzyme composition and function in the oxidation of specific substrates by oxidases1. Catalase (hydrogen peroxide: hydrogen peroxide oxidoreductase E.C. 1.11.1.6) is an essential component of this oxidizing system which facilitates the catalytic or peroxidatic destruction of hydrogen peroxide. Large granular catalase activity serves as a marker for the organelle and has been used here to describe the ontogeny of peroxisomes in mouse liver. The results indicate that bursts of peroxisomal synthesis occur during the development of the mouse liver, particularly in the early postnatal stages and during maturation.
TL;DR: This note points out the advantages of using Fritz John's theorem when solving the converse duality theorem in mathematical programming.
Abstract: Huard and Mangasarian have proved the converse duality theorem in mathematical programming by using the Kuhn-Tucker theorem. However, this note points out the advantages of using Fritz John's theorem.
TL;DR: Using a small digital computer and a quadrupole mass spectrometer, a combined time averaging-deconvolution technique has been developed as discussed by the authors to enhance greatly the signal-to-noise ratio.
TL;DR: The rate of water used by non-irrigated unpruned tea in Malawi was found to depend on the soil water deficit although this rate was modified when the tea was pruned as mentioned in this paper.
TL;DR: In this paper, the reproducibility of intensity measurements of reasonably isolated absorptions on different grating spectrometers in different laboratories has been investigated, and the results show that careful control of instrument parameters and the use of a computer program for integration gives a reproducu cibility of <±2% between intensity measurements.
Abstract: Careful control of instrument parameters and the use of a computer program for integration gives a reproducibility of <±2% between intensity measurements of reasonably isolated absorptions on different grating spectrometers in different laboratories.
TL;DR: A second autosomal blood marker, variation in erythrocytic 6-phosphogluconate dehydrogenase (6-ph phospho-D-gluconate: NADP oxidoreductase; EC 1.1.44; 6PGD) is described, which is detected by vertical starch gel electrophoresis.
Abstract: The fat-tailed marsupial mouse, Smin thops i s crassicaudata, is a promising small marsupial for the laboratory (Martin, 1965; Ewer, 1968; Crowcroft and Godfrey, 1968; Godfrey, 1969). In particular, it has potential for genetic work, since it breeds in captivity, has a litter size of from two to ten, and a haploid chromosome number of seven. In order to obtain genetic markers for the species, a survey is being undertaken to detect naturally occurring electrophoretic variants of blood enzymes and proteins. Hope and Godfrey (1968) have described such variation in serum transferrin. Finnegan and Hope (1970) have described serum amylase variation whose mode of inheritance is still to be determined. In this report we describe a second autosomal blood marker, variation in erythrocytic 6-phosphogluconate dehydrogenase (6-phospho-D-gluconate: NADP oxidoreductase; EC 1.1.1.44; 6PGD). The variants are detected by vertical starch gel electrophoresis (Smithies, 1959). Animals were either raised in the laboratory or caught wild in several parts of South Australia and southwest Queensland. Blood samples of about 0.2 ml were obtained from lightly etherized animals by puncture of the orbital sinus. All other methods were as in Cooper et al. (1969a, b). Nearly all samples gave one of three 6PGD patterns upon electrophoresis. These patterns are called PGD 1-1, PGD 2-1, and PGD 2-2 (Fig. 1). As the designation suggests, 1-1 and 2-2 are homozygous for alleles P G D 1 and P G D 2, respectively, while 2-1 is the heterozygote for them. Family data support this hypothesis (Table I). The heterozygote possessed the usual intermediate hybrid band which is found in all heterozygotes for 6PGD electrophoretic variants, e.g., that in Drosophi la (Kazazian et al., 1965), various fish (Bender and Ohno, 1968), and doves (Cooper et al., 1969a). This
TL;DR: Freeze-etched hyphae of F. oxysporum exhibited a single layered cell wall; a plasmalemma, in which invaginations were frequently associated with paramural vesicles; cytoplasma bearing lipid droplets, vacuoles, intravacuolar vesicle and nuclei with typical nuclear pores.
Abstract: Freeze-etched hyphae of F. oxysporum exhibited a single layered cell wall; a plasmalemma, in which invaginations were frequently associated with paramural vesicles; cytoplasma bearing lipid droplets, vacuoles, intravacuolar vesicles and nuclei with typical nuclear pores. Some hyphae bore crystalline inclusions characterized by a pronounced hexagonal, external ornamentation and it is suggested that the presence of these crystals and intravacuolar vesicles are indicative of aging hyphae.
TL;DR: DecDeconvolution by inverse convolution is considered in this paper, which can be applied to the processing of mass spectra and ionization efficiency curves, and it alone has characteristics that make progressive deconvolution feasible.
TL;DR: In this paper, the infrared spectra of adamantane 1-deuteroadamantane and 15 other 1-substituted derivatives were reported and errors in the reported spectrum were noted.
Abstract: We report the infrared spectra of adamantane 1-deuteroadamantane and 15 other 1-substituted derivatives in solution. Errors in the reported spectrum of adamantane are noted. Certain bands in the substituted adamantanes seem characteristic of the system and tentative assignments are discussed.
TL;DR: A line selected for high scutellar chaeta number reached a mean of about 16 chaetae in females and 13.5 in males at the 69th generation of selection following an accelerated response to selection which commenced at generation 65 and added five Chaetae.
Abstract: 1 A line selected for high scutellar chaeta number reached a mean of about 16 chaetae in females and 135 in males at the 69th generation of selection following an accelerated response to selection which commenced at generation 65 and added five chaetae 2 The accelerated response can probably be explained in terms of two recessive high chaeta number genes 105 cM apart, and which are located between po and vg on chromosome II The gene closest to vg was found to be scabrous, sca, which causes rough eyes when homozygous and has a pleiotropic effect on scutellar chaeta number The gene was found in one of the strains used in setting up the selection lines 3 The results are discussed in relation to other theories of control of the scutellar chaeta system
TL;DR: In the desert locust, Schistocerca gregaria, Westerman (1967) has shown that following exposure of males to a single dose of X-rays there are three discrete periods at which chiasma frequency may be altered, which appear to be the result of alterations in the number of chiasmata formed by the long and medium bivalents only.
Abstract: THE formation of chiasmata during or immediately prior to pachytene in eukaryotic cells can no longer be thought of as an isolated event. The weight of evidence to date suggests that it is the end-product of an interrelated series of processes initiated at some earlier stage of meiosis, some or all of which can be affected by a variety of physical and chemical agents. In the desert locust, Schistocerca gregaria, Westerman (1967) has shown that following exposure of males to a single dose of X-rays there are three discrete periods at which chiasma frequency may be altered. Thus irradiation during the S.. phase of spermatogonial mitoses and during leptotene-early zygotene gave a significant increase in chiasma frequency when scored at diplotenediakinesis. In contrast, an equal dose given during premeiotic DNA synthesis led to a significant decrease. These alterations in mean cell chiasma frequency in S. gregaria appear to be the result of alterations in the number of chiasmata formed by the long and medium bivalents only, the three small bivalents continuing to form a single chiasma under all conditions. Since the chromosomes of this species, though all telocentric, do not respond in the same way, it seemed worth while extending the study to another grasshopper species, Chorthippus brunneus (Thunb.)—one which includes metacentric as well as telocentric elements in its complement.
TL;DR: Standard assay conditions for measuring ATP sulfurylase by sulfate-dependent pyrophosphate exchange are described and some properties of the enzyme (measured in crude dialyzed extracts) are reported.
Abstract: The sulfate-dependent pyrophosphate exchange reaction has been re-examined and confirmed. Standard assay conditions for measuring ATP sulfurylase by sulfate-dependent pyrophosphate exchange are described and some properties of the enzyme (measured in crude dialyzed extracts) are reported. This method has many advantages over the well established molybdate method.
TL;DR: A quadrupole mass spectrometer, in conjunction with a small digital computer, has been used to study electron-impact excitation and subsequent auto-ionization of the outer S electrons for the rare gases neon, argon, krypton and xenon.
TL;DR: In this article, the authors draw attention to the fact that the dispersion effect of electromagnetic waves in a plasma is indistinguishable in form from that due to assigning a non-zero rest-mass to the photon.