Showing papers by "University College Cork published in 1971"
TL;DR: In this article, the effect of NaCl on the proteolysis of β-casein was investigated in Cheddar cheese and it was shown that 5−10% NaCl significantly inhibited the rate of α-scasein hydrolysates.
Abstract: 1. Proteolysis of β-casein by rennin and by pepsin was completely inhibited in the presence of 10% NaCl and was very significantly reduced by 5% NaCl. The rate of proteolysis of αs-casein was maximal in the presence of 5–10% NaCl. 2. The inhibitory effect of NaCl on the proteolysis of β-casein was independent of pH and incubation temperature. 3. The effectiveness of NaCl in controlling the development of bitter flavour in Cheddar cheese may be due to its inhibitory effect on the proteolysis of β-casein. 4. Rennin hydrolysates of β-casein were bitter in flavour whereas those of αs-casein were not.
126 citations
TL;DR: Group VIA metal complexes of triphenylphosphonium cyclopentadienylide have been studied as internally stabilised analogues of tricarbonyl anions and the influence of intramolecular metal-phosphorus interaction on the reactivity of the metal centre has been examined as mentioned in this paper.
37 citations
TL;DR: The total protein level is reduced and the electrophoretic pattern of the serum is changed in trout Salmo trutta L. infected with UDN, as in the Atlantic salmon, but these changes are not as characteristic as those in salmon and thus are of very limited use in diagnosis of outbreaks of this disease among trout.
Abstract: The total protein level is reduced and the electrophoretic pattern of the serum is changed in trout Salmo trutta L infected with UDN, as in the Atlantic salmon However, the changes in the trout are not as characteristic as those in salmon and thus are of very limited use in diagnosis of outbreaks of this disease among trout
33 citations
TL;DR: The results indicate that continuous cultivation should not be done above c.
Abstract: Summary.
As a preliminary to producing continuous cultures of lactic streptococci, several parameters affecting growth rate in broth culture were studied. The optimum pH for growth of 3 strains was c. 6.4. The results indicate that continuous cultivation should not be done above c. 27° and that, in the case of Streptococcus lactis C10, excessive aeration should be avoided. Sparging with CO2 was unnecessary and with N2 was deleterious to growth.
18 citations
TL;DR: The percentage of ether extractable fat in cream direct from a mechanical separator increased with increasing fat content as mentioned in this paper, and the effect of re-pasteurization was not a temperature effect, but was rather the consequence of the shearing forces to which the cream was exposed during the process.
Abstract: SUMMARY
The percentage of ether extractable fat in cream direct from a mechanical separator increased with increasing fat content. Centrifugal and positive rotary pumping of cream increased the extractable fat values. The amount of ether extractable fat was influenced by the head pressure on the pump, the presence of air and the cream temperature, and may also be increased during cooling and chilling, the extent depending on the method used. Re-pasteurization of cream delivered from branch to central creameries lowered the emulsion stability. The effect of re-pasteurization was not a temperature effect, but was rather the consequence of the shearing forces to which the cream was exposed during the process.
14 citations
TL;DR: Using constant flow perfusion with Tyrode solution, the response of an isolated canine saphenous vein segment to pervienous nerve stimulation and to drugs was studied, suggesting that the perivenous nerves were noradrenergic.
Abstract: USING constant flow perfusion with Tyrode solution, the response of an isolated canine saphenous vein segment to pervienous nerve stimulation and to drugs was studied. The preparation was arranged so that drugs could be applied either to the luminal surface or the adventitial surface. Pharmacological evidence suggests that the perivenous nerves were noradrenergic. A maximal constrictor response to electrical stimulation was obtained at a frequency of 20 Hz. Little change in response to electrical stimulation occurred over a temperature range from 36-20°C. The constrictor effect of noradrenaline applied to the intimal surface was greater than the effect of this amine applied adventitially. This difference persisted when the vein segment was cocainised. It is suggested that this difference in response cannot be explained solely on the basis of the noradrenergic uptake machanism. Isoprenaline relaxed the venous segment constricted by noradrenaline. This effect appeared to be due to the action of isoprenaline on beta receptors in the vein wall. Acetylcholine had a constrictor effect on this vein segment but angiotensin in the concentrations employed was without effect.
11 citations
9 citations
TL;DR: In this paper, the rate of removal of oxide films from platinized platinum electrodes immersed in 1 M phosphoric acid containing various reducing agents was investigated using cathodic stripping techniques to determine the amounts of oxide remaining on the surface after various periods of reaction.
9 citations
8 citations
5 citations
TL;DR: Limestone pavement patterns on the island of Inishmore co. Galway as discussed by the authors have been studied extensively in the last few decades, and they have been used extensively in Ireland.
Abstract: (1971). Limestone pavement patterns on the Island of Inishmore co. galway. Irish Geography: Vol. 6, No. 3, pp. 282-293.
TL;DR: It is shown that there is a lower limit to A for holomyonemes; and that the range of p for this type of fibre is limited.
Abstract: MYONEMES (muscle fibres) are classed as holomyonemes or tendomyonemes, the latter having tendon at one or both ends Four quantitative factors are defined: the partition ration (p) of a myoneme, the proportion (t) of tendon in it, the contractility ratio (a) of its fleshy part and the angle (A) through which a bone is swung around an articular axis when the myoneme is fully contracted Equations connecting these quantities are derived It is shown that there is a lower limit to A for holomyonemes; and that the range of p for this type of fibre is limited Tendon is needed if A is to be less than its holomyonemic limit and also if the range of p is increased The pennate arrangement of myonemes is particularly suitable for small movements, this being its primary function Some observational results are given
TL;DR: In this article, the size of the vortex core was predicted by balancing the pair-wise force versus the centrifugal force due to the core rotation, and the predicted value of the core size was derived from the number of rotating molecules in the core.
TL;DR: In this paper, the authors used the cell theory of liquids and the partition function approach to predict the surface tension of liquid argon for a range of temperatures and the resulting variation is very similar to that observed experimentally.
TL;DR: In this article, the design and performance of an experimental in-line harmonic tripler using a D5047 varactor diode is described and the effects of reverse bias voltage and fundamental input power at 8-8 GHZ on the third harmonic output power and the conversion efficiency are analyzed.
Abstract: The design and performance of an experimental in-line harmonic tripler using a D5047 varactor diode are described. Details of the varactor waveguide mount fabrication and of the filter for harmonic power extraction are given. Results are presented of the effects of reverse bias voltage and fundamental input power at 8-8 GHZ on the third harmonic output power and the conversion efficiency.
TL;DR: The first-order kinetics of the reaction of the substrates (I) with bromine were measured in 10% aqueous acetic acid containing OlM KBr using the electrochemical techniques described in this article.