Physiological and ecological studies on the oestrogenic isoflavones in subterranean clover (T. subterraneum L.) III. Effects of light

1967 ◽  
Vol 18 (1) ◽  
pp. 23 ◽  
Author(s):  
RC Rossiter ◽  
AB Beck

Isoflavone levels in subterranean clover leaves were higher in 13 hr days of natural daylight than in 6 hr days, but length of photoperiod per se had no substantial effect on these levels. In the field, reduction of light intensity (by shading) to 40% daylight caused no decline in isoflavone levels compared with full daylight; even at 24% daylight the reduction in levels was ill defined. On the other hand, in young seedlings there was a marked fall in isoflavone content, especially in the unifoliate leaf, as light intensity fell from 950 to 320 f.c. However, appreciable isoflavone formation was found in dark-grown clover seedlings. Possible light reactions connected with the promotion of isoflavone synthesis are discussed. Changes in isoflavone levels resulting from variation in the natural light environment are unlikely to be sufficient to affect "clover disease".

PEDIATRICS ◽  
1995 ◽  
Vol 95 (5) ◽  
pp. 681-681

Decisive interventions, like vaccines, can be quite inexpensive. But commercial organizations make money by selling commodities; they cannot produce and sell "health" per se. The most profitable commodities are those embodying the "half-way" technologies, for those with the means to pay for them-again and again and again. Vaccines, on the other hand, "may never prove as enticing as drugs for pharmaceutical makers. They can be quite expensive to develop, and they produce less income-repeated refills not required ... "


Author(s):  
António Pedro Mesquita ◽  

Predication is a complex entity in Aristotelian thought. The aim of the present essay is to account for this complexity, making explicit the diverse forms it assumes. To this end, we tum to a crucial chapter of the Posterior Analytics (1 22), where, in the most complete and developed manner within the corpus, Aristotle proceeds to systematize this topic. From the analysis, it will become apparent that predication can assume, generically, five forms: 1) the predication of essence (τὸ αύτᾢ εἶναι κατηγορεἲσθαι), that is of the genus and the specific difference; 2) essential predication (τὸ αύτᾢ εἶναι κατηγορεἲσθαι), that is either of the genus or of the differences (or their genera); 3) the predication of accidents per se 4) and of simple accidents (ώς συμβεβηκότα κατηγορεἲσθαι); and 5) accidental predication (κατἁ συμβεβηκός κατηγορεἲσθαι). However, only types 2-4 are forms of strict predication (άπλὢς). In effect, the “predication” of essence is not a genuine predication, but a formula for identity, constituting, technically, the statement of the essence of the subject (or its definition). On the other hand, accidental “predication” can only be conceived of as such equivocally, since it results from a linguistic accident through which the ontological subject of the attribution suffers a displacement to the syntactic position of the predicate, which is not, by nature, its own. In neither case does the phrase bring about any legitimate predication. The study concludes with a discussion of Aristotle’s thesis according to which no substance can be a predicate, which is implied by its notion of accidental predication, a thesis which has been - and in our opinion wrongly so - challenged in modem times.


1969 ◽  
Vol 20 (6) ◽  
pp. 1043 ◽  
Author(s):  
RC Rossiter

In experiments with young plants of the Dwalganup strain of subterranean clover, nitrogen deficiency was associated with increased concentrations of isoflavones in the expanded leaves and cotyledons. In the first trifoliate leaves the concentration of total isoflavones (formononetin+genistein+ biochanin A) was approximately doubled at low nitrogen supply. Biochanin A was much less affected than the other two isoflavones. The increase in isoflavone contents of nitrogen-deficient leaves was associated with decreased protein synthesis, but not always with increased sugar contents. The supply of carbon substrates for isoflavone synthesis may depend on starch as well as sugar contents. Practical implications of the results are considered briefly.


2014 ◽  
Vol 32 (No. 6) ◽  
pp. 570-577 ◽  
Author(s):  
T. Dropa ◽  
J. Hajšlová ◽  
K. Lancová ◽  
I. Burešová

The fate of trichothecene mycotoxins deoxynivalenol (DON), T-2 and HT-2 toxins during the bread preparation and baking was investigated in order to obtain information about the influence of processing conditions on the levels of these toxins in final products. Highly artificially contaminated wheat was used to obtain flours with three contamination levels (DON 1615–398, T-2 toxin 927–160, and HT-2 toxin 258–38 μg/kg). Method for Test Baking of Wheat Flours (ICC Standard No.131) was used within the experiments for bread sample preparation. Various combinations of dough fermentation, proofing and baking times were used to prepare test breads. For determination of toxin levels in all tested matrices, HPLC–MS/MS method was employed. No substantial effect on DON levels was observed as a result of various conditions used for bread preparation and baking; maximum DON decrease 10%, compared to contaminated flour. On the other hand, significant changes in T-2/HT-2 toxin contents were found in experimental bread compared to contaminated flour; reduction of T-2 toxin concentration (30–50%) and increase of HT-2 toxin concentration (10–70%), respectively.  


Author(s):  
Matus Porubjak
Keyword(s):  
Per Se ◽  

The paper deals with the so-called “Theognidean dilemma” in Plato’s Meno. The author tries to answer the question, if aretê is a matter of teaching or a natural human endowment from the view point of the Theognidea collection. First, he tries to identify both the ‘eugenic’ and the ‘didactic’ tendencies of the Theognidea and compare them. Then, he turns to the role of Kyrnos’ character in the collection. The author concludes that neither Kyrnos nor Theognis are historical personalities per se; primarily they are models, like the characters of Socratic dialogues. On the one hand, we have the moderate Theognis, the poet, master and erômenos with a sense of measure and justice, and on the other hand the erratic Kyrnos, the handsome and gifted erastês with a tendency to intemperance and hubris. Like Kyrnos, Meno in Plato’s dialogue is able to improve his skills and became moderate, but eventually, he fails in life. By choosing Theognis, Plato seems to reflect this similarity. From the viewpoint of the Theognidea, there is no contradiction in the verses quoted by Socrates in Meno. The position seems to be clear and “eugenic” in principle. Low-borns will never become good, but good high-borns often fail. The riddle of high-born failure is present in the works of many authors of the 5th and 4th centuries. All they are asking is how those who are destined to rule and be ex-cellent by birth and education can fail so much, as well as how society can be saved from ‘bastardization’. This issue links the Theognidea with Meno, and the quoted verses beautifully fit the topic of the dialogue.


2016 ◽  
Vol 4 (2) ◽  
pp. 286-310
Author(s):  
Anna Dolazza

The versatility of the aulos is passed on to the musician, who in turn is transformed into a physical representation of the instrument’s sound. With the precious aid of book iv of Pollux’s Onomasticon it is possible to reconstruct the special set of vocabulary linked to the sound of the aulos. If it could already in itself be considered as ἐπαγωγόν, the additional effect of the movements, gestures, and facial expressions of the aulete resulted in a strong visual, as well as emotional, impact. Nor can we forget, on the other hand, the less than favorable judgments, abundant in philosophical texts, that arose in regard to auletic performances: just as certain physiognomic traits of the aulos are to blame, so too are certain bodily movements of the aulete: almost as if the negative characteristics are passed reciprocally from instrument to musician in a sort of circular breathing. La versatilità dell’aulos si trasmette all’esecutore, che durante la performance diviene così immagine fisica e concreta del suono percepito. Con il prezioso ausilio del libro iv dell’Onomasticon di Giulio Polluce è possibile ricostruire il campo semantico legato alla produzione del suono auletico. Se esso poteva già di per sé essere avvertito come ἐπαγωγόν, inoltre, i movimenti, i gesti e le espressioni facciali dell’auleta risultavano di forte impatto visivo, oltre che emotivo. Non ci si può dimenticare, d’altro canto, dei giudizi poco benigni, affioranti soprattutto dai testi filosofici, in merito alla pratica auletica: come alcuni tratti della fisionomia dell’aulos, così anche alcuni atteggiamenti del corpo dell’auleta sono biasimevoli, quasi che le caratteristiche negative passino vicendevolmente da strumento a esecutore in una sorta di respirazione circolare. This article is in Italian.


1969 ◽  
Vol 20 (1) ◽  
pp. 25 ◽  
Author(s):  
RC Rossiter

The effects of defoliating plants of different ages in different ways on the isoflavone content of the remaining leaves were investigated. When the fully expanded leaves were removed from 3-month-old plants, formononetin and genistein were reduced and brochanin A was unaffected in leaves which expanded during the subsequent 10 days. In seedlings, all three isoflavones were reduced in concentration following defoliation. But when young leaves were removed from seedlings, the isoflavones in the older remaining leaves were increased. It is suggested that severe defoliation affects soluble carbohydrate levels which in turn affect the synthesis of the isoflavones. Continuous grazing with 3–7 breeding ewes per acre had little wffect on isoflavone levels in fully expanded clover leaves.


1959 ◽  
Vol 10 (1) ◽  
pp. 1 ◽  
Author(s):  
LT Evans

The influence of various temperature and photoperiod regimes on flower initiation and flowering in eight strains of T. subterraneum has been examined, using the controlled environment facilities of the Earhart Laboratory. Flower initiation in subterranean clover appears to be under the control of three interacting partial processes, two of which are synergistic and promotive while the third is inhibitory. The promotive processes are possibly both light-independent, one being favoured by high temperatures and the other (the vernalization process) by low temperatures. The inhibitory process, on the other hand, is restricted to the diurnal dark period and is favoured by high temperatures. The interaction between the vernalization and dark inhibitory processes is such that in the absence of dark inhibition no vernalization is required by any strain, while on. the other hand sufficient vernalization can apparently overcome all dark inhibitory effects. Treatment with gibberellic acid eliminates the need for vernalization by plants of at least one early-flowering strain when. grown in short days at high temperatures. The strains of subterranean clover differ markedly in their responses to the three partial processes. In their response to the dark inhibitory process two strains are more affected by night temperature than by night length, while in two other strains the opposite is the case, which suggests that the dark inhibitory process could be resolved into more than one component.


2021 ◽  
Author(s):  
Stefano Gagliarducci ◽  
M Daniele Paserman

Abstract This paper uses data on bill cosponsorship in the U.S. House of Representatives to estimate gender differences in cooperative behaviour. We find that among Democrats there is no significant gender gap in the number of cosponsors recruited, but women-sponsored bills tend to have fewer cosponsors from the opposite party. On the other hand, we find robust evidence that Republican women recruit more cosponsors and attract more bipartisan support on the bills that they sponsor. We interpret these results as evidence that cooperation is mostly driven by a commonality of interest, rather than gender per se.


1972 ◽  
Vol 23 (3) ◽  
pp. 411 ◽  
Author(s):  
RC Rossiter ◽  
NJ Barrow

The results of field and glasshouse experiments showed that sulphur deficiency increased isoflavone concentrations in clover leaves. Severe deficiency almost doubled the concentration of total isoflavones (formononetin + genistein f biochanin A). Usually formononetin was affected as much as, or more than, either of the other two isoflavones. Four clover strains—Dwalganup, Geraldton, Daliak, and Yarloop—which differed widely in their isoflavone concentrations did not differ significantly in their proportionate increases in isoflavone concentrations due to severe sulphur deficiency. Practical implications of the results are considered briefly. __________________ *Part VIII, Aust. J. Agric. Res., 21: 593 (1970).


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