scholarly journals Metabolism of the nucleic acids of rumen bacteria by preruminant and ruminant lambs

1981 ◽  
Vol 45 (3) ◽  
pp. 517-527 ◽  
Author(s):  
M. A. Razzaque ◽  
J. H. Topps ◽  
R. N. B. Kay ◽  
J. M. Brockway

1. A rumen bacterial culture containing specifically labelled nucleic acids was prepared using [8-14C]adenine.2. The labelled preparation was given in a liquid diet to two preruminant lambs and via a rumen tube to two ruminant lambs. The radioactivity excreted in exhaled gases, faeces and urine and that incorporated into tissues was determined.3 The preruminant lambs absorbed 58.3% of the total radioactivity measured after 24 h and the ruminant lambs 66.6% of the total activity measured after 48 h.4. Of the total radioactivity absorbed the preruminant lambs exhaled 38%, excreted 34% in urine and retained 29% in tissues. The corresponding values for the ruminant lambs were 12,41 and 47% respectively.5. There was a close relationship between total nucleic acid content and radioactivity per g of tissues of both preruminant and ruminant lambs.6. Of the radioactivity in the urine, the ruminant and one preruminant lamb excreted most in the fraction containing allantoin, while the other lamb excreted most activity in the uric acid fraction.7. The salvaging of the breakdown products of bacterial nucleic acids to make tissue nucleic acids appears to be an important synthesis in preruminant and ruminant lambs and of the likely precursors the purine base may be more important than the nucleoside.

1980 ◽  
Vol 95 (2) ◽  
pp. 395-400 ◽  
Author(s):  
Anna M. Antoniewicz ◽  
W. W. Heinemann ◽  
E. M. Hanks

SUMMARYThree ewes were intraduodenally infused with yeast RNA (15, 20 and 30 g/day) or control solutions for 3 days and the net changes in urinary allantoin excretion determined. Four mature wethers fitted with a re-entrant cannula in the proximal duodenum were fed two levels (0·66 and 1 × maintenance) of pelleted lucerne hay. Allantoin excretion was compared with total nucleic acid (NA) flow in the small intestine.The average proportion of the recovery of the infused RNA-N dose as urinary allantoin–N amounted to 0·119 ± 0·0046. The values of the net increase of allantoin-N (Y, g/day) above control levels were highly significantly correlated (n = 12, r = 0·98) with amounts of RNA-N infused (X, g/day): y = 0·1185 (± 0·0086) X–0·004 (P < 0·001). The average ratio of urinary allantoin-N to NA-N passing the duodenum during 24 h was 0·173. A difference between the two conversion factors is discussed in relation to endogenous allantoin excretion and purine base composition of yeast and bacterial RNA.


2020 ◽  
Vol 2 ◽  
pp. 37-49
Author(s):  
Marcel Henrique Rodrigues

Little has been discussed in academia about the close relationship between the Renaissance of the 16th century and melancholy humor, and esoteric elements arising mainly from Florentine Neoplatonism. The link between melancholy and esotericism becomes very clear when we analyze the gravure “Melencolia I” by Albrecht Dürer (1471-1528), composed of a significant number of symbols that refer to an esoteric religious culture that then emerged. Renaissance melancholy gained several nuances. On the one hand, it was considered a sin, a despicable mood characteristic of witches; on the other hand, a deep sense of inspiration typical of men of “genius”. This ambivalence also occurred in the firmament, as the melancholic people were guided by the dark planet Saturn, according to astrological belief. We also have the cultural scenario of the 16th century, especially in Dürer's Germany, which contributed to strengthening the melancholy issues.


1972 ◽  
Vol 6 ◽  
pp. 6-14

Horace was writing hisEpodes1at the same time as he was writingSatires. The nameEpodesis derived from the metrical term ό ἐπῳδός (і.е. στίχος) which signifies the second and shorter line of a couplet, but Horace himself referred to them asiambi(soEpod. 14. 7,Epist. i. 19. 23). The collection is titledLiber Epodonin the MSS. and the title was used by grammarians of the fourth and fifth centuries. Butiambigives a better idea of their basic inspiration. Horace says of them(Epist. i. 19. 21-5):So he claims(a)originality,(b)Archilochus as a model,(c)that he was the first Roman to use Archilochus as a model, and(d)that he discarded the vicious personal invective of Archilochus. The judgement disregards Catullus, who had writteniambibefore Horace, but whose similarity to Archilochus did not extend far beyond metre and invective. There is a consistency in Horace’s poetic career: he began by recreating the poetry of Archilochus in hisEpodes, and his later—and greatest— work was the recreation in hisOdesof the lyric poetry of poets like Sappho, Alcaeus, and Pindar. There is a similarly close relationship between theSatiresand theEpistles;and, furthermore, all of his writing uses an autobiographical technique. There is another sort of consistency too, for basicallyEpodesandSatiresexpress a similar attitude of mind: anger, contempt, and amusement are the fundamental emotions (though he often transcends these emotions in both works), and a plausible case can be made out for regarding this as a sign of a young man of low social status, unsure of himself and his talent, and already finding ways of expressing a personality that were not too self-revealing. TheOdesandEpistles, on the other hand, express a more meditative, more philosophical, more humane attitude, yet ultimately no more self-revealing.


2005 ◽  
Vol 25 (2) ◽  
pp. 179-186 ◽  
Author(s):  
Michael Schredl ◽  
Arthur Funkhouser ◽  
Nicole Arn

Empirical studies largely support the continuity hypothesis of dreaming. The present study investigated the frequency and emotional tone of dreams of truck drivers. On the one hand, the findings of the present study partly support the continuity regarding the time spent with driving/being in the truck and driving dreams and, on the other hand, a close relationship was found between daytime mood (feelings of stress, job satisfaction) and dream emotions, i.e., different dream characteristics were affected by different aspects of daytime activity. The results, thus, indicate that it is necessary to define very clearly how this continuity is to be conceptualized. The approach of formulating a mathematical model (cf. [1]) should be adopted in future studies in order to specify the factors and their magnitude in the relationship between waking and dreaming.


1963 ◽  
Vol 43 (3) ◽  
pp. 462-468 ◽  
Author(s):  
M. C. Shelesnyak ◽  
Liliane Tic

ABSTRACT The uteri of pseudopregnant rats show a peak of metabolic activity on the 4th and 5th day of leucocytic smear. After the administration of 20 mg of pyrathiazine Cl on the 4th day of pseudopregnancy (L4) in order to induce decidualization of the progestational endometrium, the metabolic activity of the uterus becomes intensified. The amount of synthesis, estimated by determinations of uterine weight, and amount of protein and nucleic acids, was considered as being related to an oestrogen surge occurring on the 3rd day. The present work was undertaken to confirm the relation between the oestrogen surge and the metabolic activity found in the uterus thereafter by using an antioestrogenic substance: ethanoxytriphetol (MER-25). The experiments were performed in pseudopregnant as well as in decidualizing animals. MER-25 was injected on the 3rd day of leucocytic vaginal smear of pseudopregnancy. Analyses of the uterine components 24, 48, 72, 96 h after the injection of the antioestrogen showed a definite inhibition of the synthetic processes in the uterus of the otherwise untreated pseudopregnant rat as well as in decidualizing uterus. The results, confirm the role of oestrogen surge in the processes of decidualization and the close relationship between the oestrogen surge, increase of metabolism and decidualization.


Zootaxa ◽  
2021 ◽  
Vol 5051 (1) ◽  
pp. 346-386
Author(s):  
SÜPHAN KARAYTUĞ ◽  
SERDAR SAK ◽  
ALP ALPER ◽  
SERDAR SÖNMEZ

An attempt was made to test if Lourinia armata (Claus, 1866)—as it is currently diagnosed—represents a species complex. Detailed examination and comparisons of several specimens collected from different localities suggest that L. armata indeed represents a complex of four closely related morphospecies that can be differentiated from one another by only detailed observations. One of the four species is identified as Lourinia aff. armata and the other three species are described as new to science and named as Lourinia wellsi sp. nov., L. gocmeni sp. nov., and L. aldabraensis sp. nov. Detailed review of previous species records indicates that the genus Lourinia Wilson, 1924 is distributed worldwide. Ceyloniella nicobarica Sewell, 1940, originally described from Nicobar Island and previously considered a junior subjective synonym of L. armata is reinstated as Lourinia nicobarica (Sewell, 1940) comb. nov. on the basis of the unique paddle-shaped caudal ramus seta V. It is postulated that almost all of these records are unreliable in terms of representing true Lourinia aff. armata described herein. On the other hand, the comparative evaluation of the illustrations and descriptions in the published literature indicates the presence of several new species waiting to be discovered in the genus Lourinia.                 It has been determined that, according to updated modern keys, the recent inclusion of the monotypic genus Archeolourinia Corgosinho & Schizas, 2013 in the Louriniidae is not justified since Archeolourinia shermani Corgosinho & Schizas, 2013 does not belong to this family but should be assigned to the Canthocamptidae. On the other hand, it has been argued that the exact phylogenetic position of the Louriniidae still remains problematic since none of the diagnostic characters supports the monophyly of the family within the Oligoarthra. It has also been argued that the close relationship between Louriniidae and Canthocamptidae is supported since both families share the homologous sexual dimorphism (apophysis) on P3 endopod. The most important characteristic that can possibly be used to define Louriniidae is the reduction of maxilliped.  


This book focuses from various perspectives on the striking similarities (as well as the concomitant differences) between early Greek and early Indian thought. In both cultures there occurred at about the same time the birth of 'philosophy', the idea of the universe as an intelligible order in which personal deity is (at most) marginal and the inner self is at the centre of attention. The similarities include a pentadic structure of narrative and cosmology, a basic conception of cosmic order or harmony, a close relationship between universe and inner self, techniques of soteriological inwardness and self-immortalisation, the selflessness of theory, envisaging the inner self as a chariot, the interiorisation of ritual, and ethicised reincarnation. Explanations for the similarites are a shared Indo-European origin, parallel socio-economic development, and influence in one direction or the other.


2018 ◽  
Author(s):  
Alberto Zava

Writings by three Italian journalist-authors provide an evocative picture of the Soviet Union during the ’50s and ’60s, interpreted through different personal styles, analytical systems and reporting techniques. In close relationship with the many-sided reality of the Soviet landscape, the meeting with the ‘other’ (geographically, culturally and in personal terms) allows Enrico Emanuelli, Carlo Levi and Guido Piovene to realise individual volumes of reportage (Emanuelli and Levi) or newspaper articles (Piovene) poised between travel literature and the informative-journalistic dimension.


Author(s):  
Stannard John E ◽  
Capper David

This chapter discusses the nature of termination for breach. Termination for breach can be seen both as a process and as a remedy. Traditionally, the topic has been dealt with under the broader umbrella of ‘discharge’, alongside such topics as performance, frustration, and agreement. Problems arise, however, when the notion of discharge is pressed too far; in particular, the idea of the contract ‘coming to an end’ can be a misleading one, and has given rise to various errors and misconceptions. For this and other reasons, more emphasis is now given to termination in the context of remedies. Termination can be one of the most useful weapons in the armoury for the victim of a breach of contract, not least because, unlike many other remedies, it does not require recourse to the courts. However, this notion of termination as a remedy should not obscure the close relationship between termination and the other modes of discharge, most notably frustration. The chapter then looks at the problems in this area of the law, including problems of terminology, the different ways in which common law and equity have approached the question, and the relationship between discharge and damages. It also considers the most important aspects of the right to terminate, including the right to refuse performance.


Author(s):  
Neil Walker

This chapter pays tribute to the concerns that animate Sadurski’s work by examining one of the more intractable sets of reasons why liberty—and liberalism—demand eternal vigilance. The immediate political context of the liberal regime is typically the sovereign nation state. Equally, the immediate political context of the illiberal regime is also the sovereign nation state. This is no coincidence. Liberalism and illiberalism alike identify sovereignty and nationalism as important enabling conditions, and there is sufficient overlap in the manner in which and the consequences with which enabling operates in these ostensibly contrasting regimes that there is inevitable seepage from one to the other. Illiberalism, then, should be considered as the shadow and temptation of liberalism, as much as a reaction against it. The chapter assesses and compares the apparently rising prospects of populist illiberalism today in both Central and Western European states, keeping that close relationship in mind.


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