Experimental studies on the early stages of secondary succession

Vegetatio ◽  
1982 ◽  
Vol 48 (2) ◽  
pp. 141-149 ◽  
Author(s):  
M. Numata
Keyword(s):  
Secondary Succession ◽  
Experimental Studies ◽  
Early Stages

scholarly journals Mechanisms of aortic valve calcification: the LDL-density-radius theory: a translation from cell signaling to physiology

2010 ◽  
Vol 298 (1) ◽  
pp. H5-H15 ◽  
Author(s):  
Nalini M. Rajamannan
Keyword(s):  
Risk Factors ◽  
Severe Aortic Stenosis ◽  
Elevated Serum ◽  
Experimental Studies ◽  
Atherosclerotic Lesion ◽  
Disease Process ◽  
Prognostic Indicator ◽  
Epidemiologic Studies ◽  
Factors Associated ◽  
Early Stages

Recent epidemiologic studies have revealed the risk factors associated for vascular atherosclerosis, including the male sex, smoking, hypertension, and elevated serum cholesterol, similar to the risk factors associated with the development of AV stenosis. An increasing number of models of experimental hypercholesterolemia demonstrate features of atherosclerosis in the AV, which are similar to the early stages of vascular atherosclerotic lesions. Experimental and clinical studies demonstrate that the hypercholesterolemic AV develops an atherosclerotic lesion which is proliferative and expresses high levels of osteoblast bone markers which mineralize over time to form bone. Calcification, the end-stage process of the disease, is necessary to understand as a prognostic indicator in the modification of this cellular process before it is too late. In summary, these findings suggest that medical therapies may have a potential role in patients in the early stages of this disease process to slow the progression to severe aortic stenosis and to delay the timing of the need for surgery. The translation of these experimental studies to clinical practice will be important to understand the potential for medical therapy for this disease process.

scholarly journals Ecology of Pioneer Species of Early Stages in Secondary Succession II

1968 ◽  
Vol 81 (956) ◽  
pp. 55-66 ◽  
Author(s):  
Ichiroku HAYASHI ◽  
Makoto NUMATA
Keyword(s):  
Secondary Succession ◽  
Pioneer Species ◽  
Early Stages

Experimental Studies on Dibothriocephalus latus in Man

1924 ◽  
Vol 2 (4) ◽  
pp. 151-166 ◽  
Author(s):  
G. Z. L. Le Bas
Keyword(s):  
Sexual Maturity ◽  
Experimental Studies ◽  
Early Stages

1. Infection with Dibothriocephalus latus for as long a period as nine months or with as many as three worms, apart from diarrhoea in the early stages does not necessarily give rise to any symptoms which would suggest the presence of the parasite.2. In these experimental cases a definite train of symptoms, i.e., constipation for a period of one or more days followed by diarrhcua marked the onset of complete sexual maturity of the parasite.3. No appreciable anaemia was produced, nor was there a definite diminution of erythrocytes.

scholarly journals Do heavy-metal grassland species survive under a Scots pine canopy during early stages of secondary succession?

2015 ◽  
Vol 50 (4) ◽  
pp. 317-329 ◽  
Author(s):  
Paweł Kapusta ◽  
Grażyna Szarek-Łukaszewska ◽  
Monika Jędrzejczyk-Korycińska ◽  
Monika Zagórna
Keyword(s):  
Heavy Metal ◽  
Scots Pine ◽  
Secondary Succession ◽  
Grassland Species ◽  
Early Stages

C10-polyacetylenes as allelopathic substances in dominants in early stages of secondary succession

1980 ◽  
Vol 6 (1) ◽  
pp. 119-131 ◽  
Author(s):  
Akio Kobayashi ◽  
Shigeo Morimoto ◽  
Yoshiari Shibata ◽  
Kyohei Yamashita ◽  
Makoto Numata
Keyword(s):  
Secondary Succession ◽  
Early Stages

An experimental approach to the development of the ear capsule in the turtle, Chelydra serpentina

Development ◽  
1965 ◽  
Vol 13 (2) ◽  
pp. 141-149
Author(s):  
M. J. Toerien
Keyword(s):  
Recent Work ◽  
Experimental Approach ◽  
Experimental Studies ◽  
Chelydra Serpentina ◽  
Medial Aspect ◽  
Early Stages ◽  
Otic Placode ◽  
Auditory Region

The effects of the elimination of the otic placode or otocyst on the development of the cartilaginous ear capsule and columella auris have been observed in several fishes, amphibians and birds and are summarized by de Beer (1937), Yntema (1955) and Benoit (1957). More recent work includes that of Benoit (1960) and Toerien (1963). Except in the fish Acipenser (Filatow, 1930) the development of a cartilaginous ear capsule is completely suppressed following the removal of the otocyst. The effect of the operation on the development of the columella is not so clear and the resultant deficiency in the medial aspect has been interpreted in various ways. Yntema's (1965) method for using turtle eggs has made the early stages of reptilian embryos available for experimental studies. The purpose of the present investigation, therefore, is to study the effect of the removal of the placode on the development of the auditory region in yet another vertebrate class

Experimental studies on early stages of the development of pulmonary silicosis in pups

1971 ◽  
Vol 4 (3) ◽  
pp. 243-252 ◽  
Author(s):  
S.H. Zaidi ◽  
Ravi Shanker ◽  
R.K.S. Dogra
Keyword(s):  
Experimental Studies ◽  
Early Stages

Language lateralization in adult bilinguals

1982 ◽  
Vol 4 (2) ◽  
pp. 153-169 ◽  
Author(s):  
Marjorie B. Wesche ◽  
Eta I. Schneiderman
Keyword(s):  
Second Language ◽  
Second Language Acquisition ◽  
Language Acquisition ◽  
Dichotic Listening ◽  
Right Hemisphere ◽  
Experimental Studies ◽  
Unified Theory ◽  
Single Word ◽  
Early Stages ◽  
Verbal Tasks

Recent experimental studies of bilinguals have provided evidence of less left lateralization (i.e. greater right hemisphere participation) for verbal tasks in the second language than in the first. Other clinical and experimental studies of adults suggest that the normal adult right hemisphere has certain residual language-related capacities and that it plays a role in the early stages of both child and adult language acquisition. These findings lead us to postulate a link between right hemisphere involvement in the early stages of first and second language acquisition.Two studies were designed to investigate this issue. The subjects of the studies were adult French-English bilinguals, with one group dominant in English and a second in French. A single word dichotic listening paradigm was employed in both studies. Following Obler (1981), the hypotheses were 1) that the second language dichotic task would show less left lateralization (greater right hemisphere involvement) than the first and 2) that greater proficiency in the second language would correlate with a higher degree of left lateralization (less right hemisphere involvement) on the dichotic test in that language. The studies provide some support for these hypotheses and thus, indirectly, for a unified theory of first and second language acquisition.

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