A QUANTITATIVE STUDY OF SPERMATOGENESIS IN RATS BEARING HYPOTHALAMIC LESIONS OF MAMMILLARY AND SUPRA-CHIASMATIC NUCLEI

1969 ◽  
Vol 60 (2) ◽  
pp. 276-280
Author(s):  
Bernard A. Rüedi
Keyword(s):  
Quantitative Analysis ◽  
Quantitative Study ◽  
Germinal Cell ◽  
Suprachiasmatic Nuclei ◽  
Hypothalamic Lesions ◽  
Cell Counts ◽  
Significant Change ◽  
Bilateral Lesions ◽  
Made In

ABSTRACT A quantitative analysis of spermatogenesis has been made in rats bearing bilateral lesions of the lateral mammillary nuclei or of the suprachiasmatic nuclei of the hypothalamus. There was no significant change in the germinal cell counts in lesioned rats as compared either with normal or with sham operated rats.

THE EFFECT OF HYPOTHALAMIC LESIONS ON REPRODUCTIVE ACTIVITY IN SHEEP

1967 ◽  
Vol 39 (3) ◽  
pp. 415-NP ◽  
Author(s):  
H. M. RADFORD
Keyword(s):  
Median Eminence ◽  
Reproductive Activity ◽  
Mammillary Body ◽  
Optic Chiasma ◽  
Hypothalamic Lesions ◽  
Apparent Change ◽  
Electrolytic Lesions ◽  
Releasing Factors ◽  
Bilateral Lesions ◽  
Made In

SUMMARY Electrolytic lesions were made in the hypothalamus of 41 Merino ewes which were subsequently observed for 2–16 months. Ovarian inactivity resulted from bilateral medial and ventral lesions placed immediately posterior to the optic chiasma (four ewes) or immediately anterior to the mammillary body (five ewes). Failure to show oestrus while apparently still ovulating regularly was a feature in another four ewes in which bilateral medial and ventral lesions were placed between the sites already described. Small bilateral lesions in these ventral regions led initially to ovarian inactivity, but final re-establishment of apparently normal reproductive activity in three ewes. Bilateral lesions in regions other than those described above resulted in no apparent change in reproductive activity (eight ewes). Similarly, unilateral or asymmetrical lesions in the remaining 17 ewes failed to affect their reproductive activity. The results are consistent with the hypothesis that in sheep a region of the median eminence responsible for the production of gonadotrophin-releasing factors requires neural inputs traversing both anterior and posterior hypothalamic areas.

scholarly journals Structural analysis of Nicholas II's speeches

2017 ◽  
Vol 4 (3) ◽  
pp. 35-52
Author(s):  
E.V. Kuzmina
Keyword(s):  
Quantitative Analysis ◽  
Structural Analysis ◽  
Significant Change ◽  
Made In

A quantitative analysis of the structure of Nicholas II's speeches was made in the period 1894-1906, in comparison with his speeches, presented in the journal Niva in 1916. The basis for the analysis is the total number of words in the sentences that make up the analyzed speech. A significant change in the total number of words in sentences pertaining to the dates considered has been revealed.

New insight into the molecular switch mechanism of human Rho family proteins: shifting a paradigm

2013 ◽  
Vol 394 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Mamta Jaiswal ◽  
Eyad Kalawy Fansa ◽  
Radovan Dvorsky ◽  
Mohammad Reza Ahmadian
Keyword(s):  
Quantitative Analysis ◽  
Bound State ◽  
Molecular Switch ◽  
Nucleotide Exchange ◽  
Gtp Binding ◽  
Switch Mechanism ◽  
Rho Family ◽  
Rho Family Proteins ◽  
Insight Into ◽  
Made In

Abstract Major advances have been made in understanding the structure, function and regulation of the small GTP-binding proteins of the Rho family and their involvement in multiple cellular process and disorders. However, intrinsic nucleotide exchange and hydrolysis reactions, which are known to be fundamental to Rho family proteins, have been partially investigated in the case of RhoA, Rac1 and Cdc42, but for others not at all. Here we present a comprehensive and quantitative analysis of the molecular switch functions of 15 members of the Rho family that enabled us to propose an active GTP-bound state for the rather uncharacterized isoforms RhoD and Rif under equilibrium and quiescent conditions.

Bilateral Lesions of the Suprachiasmatic Nuclei Alter the Nocturnal Melatonin Secretion in Sheep

1995 ◽  
Vol 7 (2) ◽  
pp. 145-152 ◽  
Author(s):  
A. Tessonneaud ◽  
A. Locatelli ◽  
M. Caldani ◽  
M. C. Viguier-Martinez
Keyword(s):  
Suprachiasmatic Nuclei ◽  
Melatonin Secretion ◽  
Bilateral Lesions

scholarly journals N.M.R. studies of ligand exchange on acetylacetonatotrimethylplatinum(IV)

1975 ◽  
Vol 28 (4) ◽  
pp. 759 ◽  
Author(s):  
NS Ham ◽  
JR Hall ◽  
GA Swile
Keyword(s):  
Activation Energy ◽  
Quantitative Analysis ◽  
Ligand Exchange ◽  
Variable Temperature ◽  
Order Reaction ◽  
First Order Reaction ◽  
First Order ◽  
Cdcl3 Solution ◽  
Made In

A quantitative analysis of the variable-temperature 1H N.M.R. spectra of acetylacetonatotrimethyl-platinum(IV) has been made. In CDCl3 solution the exchange of acetylacetonate ligands is a first-order reaction and proceeds predominantly by dissociation of the dimer into two separated five-coordinate activated complexes. The activation energy is 61.5 � 0.8 kJ mol-1.

Evaluation of Recurrent Pediatric Syncope: Role of Tilt Table Testing

PEDIATRICS ◽  
1994 ◽  
Vol 93 (4) ◽  
pp. 660-662
Author(s):  
Margaret J. Strieper ◽  
Debbie O. Auld ◽  
J. Edward Hulse ◽  
Robert M. Campbell
Keyword(s):  
Pediatric Patients ◽  
Neurocardiogenic Syncope ◽  
Tilt Table ◽  
Conversion Reaction ◽  
Cell Counts ◽  
Group I ◽  
Tilt Table Testing ◽  
Group Ii ◽  
Made In

Objective. To determine the current practice and effectiveness of evaluating recurrent syncope in pediatric patients, and to establish the role of tilt table testing in the evaluation. Design. Retrospective analysis of 54 pediatric patients with the history of syncope referred to cardiologists. Group I consisted of 27 patients examined without tilt table testing group II consisted of 27 patients whose examination included tilt table testing. Results. Group I had an average of 5.4 studies and group II, 6.6 studies performed per patient. Studies included chest radiograph (16 vs 13), electrocardiogram (24 vs 27), echocardiography (21 vs 27), 24-hour electrocardiogram (14 vs 16), transtelephonic monitor (7 vs 8), electrophysiology study (1 vs 3), complete blood cell counts (11 vs 12), chemistries (10 vs 11), thyroid function test (3 vs 3), neurology consult (12 vs 6), electroencephalogram (12 vs 5), and head computed tomographic scan (5 vs 3). Of the 298 non-tilt studies, the results of only 5 (1.6%) were abnormal. Diagnoses were made in 5 (18.5%) of 27 group I patients (Wolff-Parkinson-White syndrome, 1; conversion reaction, 2; hyperventilation, 1; migraines, 1), whereas diagnosis was made in 27 (100%) of 27 group II patients (neurocardiogenic syncope, 25; conversion reaction, 2). Conclusion. An extensive workup is not routinely indicated in syncopal patients with a history consistent with neurocardiogenic syncope. Tilt table testing performed early in the evaluation will increase the probability of a diagnosis, and will often prevent the need for further extensive, expensive anxiety-producing tests.

scholarly journals A CORPUS-BASED QUANTITATIVE ANALYSIS OF SEVEN ENGLISH VERSIONS OF "SHU DAO NAN" CONCERNING THE HARMONY-GUIDED THREE-LEVEL POETRY TRANSLATION CRITERIA

2020 ◽  
Vol 5 (4) ◽  
Author(s):  
Ying Ting ◽  
Wang Feng
Keyword(s):  
Quantitative Analysis ◽  
Comparative Study ◽  
Quantitative Study ◽  
Poetry Translation ◽  
The Comparative Study

<p>This paper makes a comparative study of seven English versions of "<em>Shu Dao Nan</em>" at the lexical, syntactic and textual levels. It carries out an objective quantitative study on the theory, Harmony-Guided Three-Level Poetry Translation Criteria -- "Harmony-Resemblance in Style, Sense and Poetic Conception-Eight Beauties" criteria, to reveal the styles of different translated versions and to provide reference and inspiration for the comparative study of poetry translation.</p><p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0629/a.php" alt="Hit counter" /></p>

URINARY 17-HYDROXYCORTICOSTEROID EXCRETION IN GUINEA-PIGS WITH HYPOTHALAMIC LESIONS

1966 ◽  
Vol 53 (3) ◽  
pp. 369-381 ◽  
Author(s):  
Bryant Benson
Keyword(s):  
Guinea Pig ◽  
Cold Exposure ◽  
Guinea Pigs ◽  
Insulin Injection ◽  
Self Control ◽  
Base Line ◽  
Acth Secretion ◽  
Anatomic Site ◽  
Hypothalamic Lesions ◽  
Bilateral Lesions

ABSTRACT An attempt was made to localize an anatomic site in the hypothalamus where mechanisms are to be found for the control of pituitary adrenocorticotrophin (ACTH) secretion in the adult male guinea-pig. Daily urinary 17-hydroxycorticosteroid (17-OHCS) excretion and the effects of cold exposure and insulin on base-line 17-OHCS excretion levels were determined preoperatively. Each animal acted as a self control. Bilateral electrolytic coagulation lesions were placed in a variety of hypothalamic sites in sixty-eight animals, and base-line 17-OHCS excretion levels and the 17-OHCS response to cold exposure and insulin injection were again determined. Preoperative and postoperative values were compared and the ablated anatomic sites noted. Animals with bilateral lesions in the ventromedian and dorsomedian nuclei displayed a significant reduction in daily 17-OHCS excretion, and 17-OHCS responses to cold exposure and insulin injection. Animals with posterior hypothalamic lesions and sham operated animals had postoperative daily 17-OHCS values and 17-OHCS responses to cold and to insulin that were above or equal to the preoperative values. It was postulated that in the guinea-pig the hypothalamic mechanisms in control of ACTH are to be found in the middle and anterior hypothalamus, in the neuropil associated with the ventromedian and dorsomedian nuclei.

Quantitative Analysis of the Camera Market Based on the Integrated Application Of game-Theoretic and Econometric Approaches

2021 ◽  
pp. 15-22
Author(s):  
Dmitriy Vlasov ◽  
P. Karasev ◽  
Aleksandr Sinchukov
Keyword(s):  
Risk Factor ◽  
Quantitative Analysis ◽  
Marketing Strategies ◽  
Game Model ◽  
Managerial Decisions ◽  
Game Theoretic ◽  
Dynamic Series ◽  
Basic Game ◽  
Made In

This article contains a quantitative analysis of the camera market and discloses the possibilities of comprehensive application of quantitative analysis and theoretical game modeling in the practice of making decisions in the field of the photo industry. It is noted that almost any phenomenon in the financial and economic sphere requires a thorough and comprehensive assessment, and the method of analyzing data in the form of dynamic series and theoretical and game models is most in demand in the conditions of actualization of risks of various nature. It is shown that the analysis of the dynamic series allows you to evaluate and predict the development of the economic situation, to form recommendations for making managerial decisions. Particular attention is paid to the construction and analysis of the basic game model of the manufacturer's choice of camera equipment for the time of launch of products to the market, taking into account projected demand. The inclusion of the risk factor in the process of quantitative analysis of the camera market helps to improve the quality of decisions made, in particular when choosing marketing strategies.

SKIN HEPARIN LEVELS AND POSTHEPARIN PLASMA CLEARING FACTOR LIPASE LEVELS IN IRRADIATED ADRENALECTOMIZED AND CORTISONE-TREATED RATS

1963 ◽  
Vol 41 (1) ◽  
pp. 1901-1906
Author(s):  
Frank C. Monkhouse ◽  
Donald G. Baker
Keyword(s):  
Mast Cell ◽  
Plasma Levels ◽  
Peritoneal Mast Cell ◽  
Rat Tissues ◽  
Cell Counts ◽  
X Irradiation ◽  
Mast Cell Count ◽  
Significant Change ◽  
Total Body ◽  
Adrenalectomized Rats

Experiments were carried out to determine whether changes in endogenous heparin in rat tissues were related to changes in plasma levels of clearing factor lipase (CFL). Skin heparin levels, postheparin plasma CFL levels, and peritoneal mast cell counts were measured in normal, adrenalectomized, cortisone-treated, and X-irradiated rats. Total body X-irradiation in doses of 400 r to 600 r decreased skin heparin levels. The postheparin CFL levels of irradiated rats remained high while that of pair-fed controls dropped significantly. Cortisone treatment for 6 days caused an increase in plasma CFL levels in both intact and adrenalectomized rats but no significant change in skin heparin levels or mast cell count. Adrenalectomy caused no significant change in either postheparin CFL or skin heparin levels.

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