scholarly journals Performance of Eucalyptus Clones in Auto and Allocompetition

2014 ◽  
Vol 63 (1-6) ◽  
pp. 9-14 ◽  
Author(s):  
Gustavo Salgado Martins ◽  
G. P. L. Moura ◽  
M. A. P. Ramalho ◽  
F. M. A. Gonçalves
Keyword(s):  
Competitive Ability ◽  
Minas Gerais ◽  
Point Of View ◽  
Diallel Crosses ◽  
Mean Values ◽  
Total Height ◽  
Breast Height ◽  
The Mean ◽  
Per Se

Abstract This study was performed to estimate the abilities of eucalyptus clones to exercise as well as to tolerate competition and to compare their behaviors under auto- or allocompetition. Six commercial clones, belonging to PLANTAR S/A enterprise were evaluated for breast height circumference (BHC), total height (TH) and volume (VOL). At three locations of Minas Gerais, Brazil (two in Curvelo and one in Felixlândia) the clones were planted in two spaces. At 36 months of age each clone was evaluated for exercising and toleration competition amongst each other. The design for each experiment was similar to that of the nine-hole system; the center clone being under competition and the eight surrounding the center clone exercising competition. Each clone under competition was repeated eight times; therefore, for each spacing and location, six contiguous experiments were conducted. From the mean values; the parameters of ability to exercise competition (ci), ability to tolerate competition (tj), the specific competitive ability (sij) and the performance per se of the clones (aj) were estimated using a model similar to that of diallel crosses. The clones differed as to their ci, tj and aj. No one clone exhibited high and positive ci and tj. Regardless of location, spacing, or clone, the performance of autocompetition is similar to that of allocompetition. This indicates that a mixture of clones, if advantageous from the management or industrial point of view, may be performed without harm to the volume of wood produced.

Site Index Curves for Norway Spruce in Southern Ontario1

1989 ◽  
Vol 6 (1) ◽  
pp. 23-26 ◽  
Author(s):  
Andrew M. Gordon ◽  
Peter A. Williams ◽  
Edward P. Taylor
Keyword(s):  
Norway Spruce ◽  
Soil Texture ◽  
Sandy Soils ◽  
Site Index ◽  
Height Growth ◽  
Stem Analysis ◽  
Mean Values ◽  
Breast Height ◽  
Drainage Class ◽  
The Mean

Abstract Four dominant or codominant Norway spruce trees from each of 55 sites were destructively sampled and the annual height growth determined by stem analysis. The sampled sites were stratified by soil textural class (coarse, medium, and fine) and depth to distinct mottling (0-16, 16-40, and 40 in.). Two sets of an-amorphic site index curves were constructed using a total age of 30 years (SI30), and breast height age of 25 years (SIBH25) as base ages. The mean SI30 from Ontario (53 ft) was found to be 17.8% higher than the mean values published from Vermont (45 ft) and currently used in Ontario. SIBH25 values had a range of 34.6 to 74.8 ft with a mean of 55.3 ft. Analysis of variance showed significant differences in SIBH25 due to soil texture and drainage class, and in years to breast height (BH) due to drainage class. SIBH25 was highest on sites with loamy soils and distinct mottling at 16-40 in. It took an average of 6.5 years for seedlings to reach BH with a range of 3 to 12 years. Years to BH was lowest on sites with sandy soils and those with distinct mottling below 40 in. North. J. Appl. For. 6(1):23-26, March 1989.

Tactile Sensibility of Natural Teeth and Osseointegrated Dental Implants to Loading

2015 ◽  
Vol 15 (1) ◽  
pp. 58-62
Author(s):  
Linards Grieznis ◽  
Peteris Apse ◽  
Leons Blumfelds
Keyword(s):  
Dental Implants ◽  
Vertical Axis ◽  
Point Of View ◽  
Endodontically Treated Teeth ◽  
Tactile Sensibility ◽  
Mean Values ◽  
Osseointegrated Implants ◽  
Tactile Threshold ◽  
Natural Teeth ◽  
The Mean

SummaryIntroduction. Dental implant therapy has become a popular method of replacing one or more missing teeth. Osseointegrated dental implants have been studied from histological, microbiologic and biomechanical point of view, but the neurophysiologic integration of the implants and the supported prostheses has received less attention. The sensory mechanism of dental implants is qualitatively different from that of natural teeth. Psychophysiological tests are used to determine the tactile sensibility perceived with the implants and teeth.Aim of the study. The purpose of this study was to compare tactile sensibility of natural teeth and osseointegrated dental implants.Material and methods. Forty-three patients were included in the study. Natural teeth were divided into two groups: non endodontically treated teeth (NETT) and endodontically treated teeth (ETT). Load tests were done by a computer-controlled pressure sensitive device („Power Lab“ Data Acquisition System - model 4/25T, sensor - model MLT003/D; ADInstruments), specially modified for intraoral use. Pushing forces were applied parallel to the vertical axis of teeth and implants. The patient held a signal button which he/she activated as soon as touch was sensed. At this moment the computer registered passive absolute tactile threshold - measured in Newtons. The mean values of passive absolute tactile threshold for natural teeth and dental implants were calculated. Comparison of the mean values was performed by the means of t-test.Results. Passive absolute tactile threshold for osseointegrated dental implants was 2.39 N (SD=1.92), and for teeth - 0.67 N (SD=0.72), for non endodontically treated teeth it was 0.63 N (SD=0.72) and for endodontically treated teeth - 0.73 N (SD=0.69). The differences in mean values were statistically significant (p<0,0001) except for mean values of NETT vs. ETT.Conclusion. This study shows that patients with osseointegrated implants subjectively feel “touch” sensation when greater force is applied compared with natural teeth.

scholarly journals On the occurrence, origin, and intake of the nuclides, 210Po and 210Pb, in sclerotia of Wolfiporia cocos collected in China

2022 ◽  
Author(s):  
Dagmara Strumińska-Parulska ◽  
Jerzy Falandysz ◽  
Aleksandra Moniakowska
Keyword(s):  
Dry Weight ◽  
Point Of View ◽  
Raw Material ◽  
Radiological Protection ◽  
Radiation Doses ◽  
Mean Values ◽  
Medicinal Value ◽  
In The Wild ◽  
The Mean ◽  
Effective Radiation

Abstract The dried sclerotium of the fungus Wolfiporia cocos is edible and has medicinal value. This study aimed to understand the accumulation of radioactivity arising from the alpha 210Po, and beta-emitting 210Pb, in the sclerotium’s shell and core and assess a potential effective dose for consumers. Sclerotia were collected in the wild and from cultivars in China’s Anhui and Yunnan provinces. The mean values of 210Po activity concentration levels were 0.36 Bq kg−1 dry weight in the core and 12.0 Bq kg−1 dw in the shell; 210Pb activities were 0.43 and 9.84 Bq kg−1 dw, respectively. The potential effective radiation doses from core layers (as a major raw material of the sclerotium) ranged from 0.13 to 3.43 µSv kg−1 dw from 210Po decay and from 0.11 to 1.52 µSv kg−1 dw from 210Pb decay. Corresponding values for shell ranged from 0.80 to 42.4 for 210Po and from 0.53 to 13.6 µSv kg−1 dw for 210Pb. In general, the intake of W. cocos sclerotia varies between consumers, but this would not significantly change the effective radiation doses from 210Po and 210Pb isotopes. The consumption thus appears to be safe from a radiological protection point of view. Graphical abstract

scholarly journals A Comparative Biometric Study of Albino and Coloured Guinea-pigs from the point of view of their Suitability for Experimental Use

1930 ◽  
Vol 30 (3) ◽  
pp. 311-330 ◽  
Author(s):  
G. W. Dunkin ◽  
P. Hartley ◽  
E. Lewis-Faning ◽  
W. T. Russell
Keyword(s):  
Guinea Pigs ◽  
Normal Weight ◽  
Point Of View ◽  
Reverse Direction ◽  
Mean Values ◽  
The Mean ◽  
The Difference ◽  
Experimental Use ◽  
Rates Of Growth ◽  
Apparent Influence

1. The average number of guinea-pigs born in albino litters is 3·000 as against 3·097 in the case of the mixed group, but the difference between the mean values is not statistically significant. Hence, it will be seen that there is little or no relationship between the colour of guinea-pigs and the number of their progeny.2. It may be said that there is a relationship between fertility and the period of the year. There is a tendency for fewer litters to be born during the quarter, January to March, and likewise for the fertility to be lowest during this period, as the mean number of births per litter is 2·65 for albino guineapigs and 2·67 for the mixed class, both values being significantly below the mean for the whole period.3. The mean weight of the albino guinea-pigs at birth is 81·2 ± 0·36 grm., the corresponding value for the cream, cream and white class is 82·6 ± 0·43, but the difference is of no statistical importance. Hence we conclude that the weight of a guinea-pig at birth is not affected by its colour. Once again attention is centred on the January–March quarter as the most unfavourable period, since there is a tendency for guinea-pigs of either colour born in these months to be below the normal weight.4. When allowance was made for the effects of selection on our data, there was no material difference between the rates of growth for the two types of guinea-pigs and, furthermore, the period of the year at which littering occurred exercised no apparent influence.5. The rate of mortality during the first thirteen days of life amongst albino guinea-pigs is 5·58 per 1000 per day, and amongst cream, cream and white guinea-pigs 4·73 per 1000 per day, but the difference probably represents nothing fundamental because, when the mortality is studied according to the size of the litter, the rates are sometimes in the reverse direction.6. Finally, there is, in the present data, nothing to suggest that albino guinea-pigs are as regards fertility, growth and mortality, significantly different from cream, cream and white guinea-pigs.

scholarly journals CERRADO RUPESTRE DO ESPINHAÇO: diversidade genética de espécie endêmica

2020 ◽  
Vol 18 (01) ◽  
pp. 300-330
Author(s):  
Leonardo Ferreira da Silva ◽  
Afrânio Farias de Melo Júnior ◽  
Dario Alves de Oliveira ◽  
Elytania Veiga de Menezes ◽  
Vanessa de Andrade Royo ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Gene Flow ◽  
Mean Value ◽  
Minas Gerais ◽  
Shannon Index ◽  
Mountain Range ◽  
Campos Rupestres ◽  
Mean Values ◽  
El Alto ◽  
The Mean

O objetivo do trabalho foi de caracterizar a diversidade e a estrutura genética de 82 indivíduos de P. adamantinum, espécie de campos rupestres e de altitude do Cerrado brasileiro, na região central de Minas Gerais, divididos em 02 populações de 41 indivíduos. Foram utilizados 08 primers ISSR que amplificaram 135 locos, com 108 (80%) locos polimórficos entre as populações e média de 16,9 locos por primer. O valor médio de PIC foi de 0,375. Os valores médios do índice de Shannon (I) e da diversidade genética de Nei (He) foram de 0,491 e 0,341, respectivamente. O índice da proporção da diversidade genética (GST = 0,047) demonstrou que a variabilidade entre e dentro das populações contribuiu com 4,7% e 95,3% da heterozigosidade total (HT), respectivamente. O fluxo gênico observado foi alto (Nm = 10,213), o que contrapõe os efeitos da deriva genética. Foi observada a ocorrência de baixa estruturação genética espacial (EGE) (Sp= 0,058) e coancestria positiva nas duas populações (Fij = 0,016; P < 0,123 em POP01 e Fij = 0,018; P < 0,057 em POP02), ambas avaliadas até a segunda classe de distância. Mesmo com a presença de fatores favoráveis à endogamia, P. adamantinum apresentou altos índices de diversidade genética. O elevado fluxo gênico registrado pode terr amenizado os efeitos do acasalamento de indivíduos aparentados. Palavras-chave: ISSR. Fluxo Gênico. Cerrado. Espécie Endêmica. Estrutura Espacial.   THE CAMPOS RUPESTRES OF ESPINHAÇO: mountain range: genetic diversity of endemic species ABSTRACT The objective of the study was to characterize the diversity and genetic structure of 82 individuals of P. adamantinum, divided into 02 populations of 41 individuals. We used 08 ISSR primers that amplified 135 loci, with 108 (80%) polymorphic loci between the populations and a mean of 16.9 loci per primer. The mean value of PIC was 0.375. The mean values ​​of the Shannon index (I) and the genetic diversity of Nei (He) were 0.491 and 0.341, respectively. The genetic diversity ratio index (GST = 0.047) showed that the variability between and within the populations contributed with 4.7% and 95.3% of the total heterozygosity (HT), respectively. The observed gene flow was high (Nm = 10,213), which contrasts the effects of genetic drift. The occurrence of low spatial genetic structuration (EGE) (Sp = 0.058) and positive coancestry in both populations (Fij = 0.0161; P < 0.123 in POP01 and Fij = 0.018; P < 0, 057 in POP02), both evaluated up to the second distance class. Even with the presence of factors favorable to inbreeding, P. adamantinum presented high levels of genetic diversity. The high recorded gene flow was responsible for mitigating the effects of mating of related individuals Keywords: ISSR. Gene Flow. Cerrado. Endemic Specie. Spatial Structure.   CERRADO RUPESTRE DEL ESPINHAÇO: diversidad genética de especie endémica RESUMEN El objetivo del estudio fue caracterizar la diversidad y la estructura genética de 82 individuos de P. adamantinum, una especie típica del Cerrado brasileño, en la región central de Minas Gerais, dividida en 02 poblaciones de 41 individuos. Se utilizaron 08 cebadores ISSR que amplificaron 135 loci, con 108 (80%) loci polimórficos entre poblaciones y un promedio de 16.9 loci por cebador. El valor medio de PIC fue 0.375. Los valores medios del índice de Shannon (I) y la diversidad genética de Nei (He) fueron 0.491 y 0.341, respectivamente. El índice de la proporción de diversidad genética (GST = 0.047) demostró que la variabilidad entre y dentro de las poblaciones contribuyó con 4.7% y 95.3% de la heterocigosidad total (HT), respectivamente. El flujo de genes observado fue alto (Nm = 10.213), lo que se opone a los efectos de la deriva genética. Se observó la ocurrencia de baja estructura genética espacial (EGE) (Sp = 0.058) y coancestria positivo en ambas poblaciones (Fij = 0.016; P <0.123 en POP01 y Fij = 0.018; P <0.057 en POP02), ambos evaluados hasta el segundo clase de distancia. Incluso con la presencia de factores favorables a la endogamia, P. adamantinum mostró altas tasas de diversidad genética. El alto flujo de genes registrado fue responsable de mitigar los efectos del apareamiento de individuos relacionados. Palabras clave: ISSR. Flujo de genes. Cerrado. Especies endêmicas. Estructura espacial.

Comparaison de différentes approches, modèles et tailles d'échantillons pour l'établissement de relations hauteur-diamètre locales

1995 ◽  
Vol 25 (8) ◽  
pp. 1303-1312 ◽  
Author(s):  
Jean Bégin ◽  
Frédéric Raulier
Keyword(s):  
Sample Size ◽  
Residual Variance ◽  
Sample Plot ◽  
Sample Sizes ◽  
Total Height ◽  
Breast Height ◽  
Mean Diameter ◽  
The Mean ◽  
The Individual ◽  
Model Approach

This study compares the predictability of 3 approaches, 4 models, and 10 different sample sizes to determine local relationships between total height and diameter at breast height in balsam fir stands less than 50 years old. The results show that a system of height–diameter curves based on the mean diameter and mean height of the sampled trees (approach 3) gives the most precise estimations in comparison with curves resulting from pooling all sampled trees in a single height–diameter model (approach 1) and with those resulting from the application of a height–diameter model for each of the combinations of sample plot–measurement periods (approach 2). Depending on the sample size, the residual variance of the total height or the total volume is reduced 2 to 2.5 times for the individual stems and 2 to 15 times for the mean stem, when using approach 3 instead of approach 1. Approach 3 is more precise than approach 2 for sample sizes that vary between three and five sampled trees per plot. However, this gain in precision becomes negligible when the sample size approaches 10 sampled trees per plot.

scholarly journals Functional optimality of personal the meaning of the profession

2020 ◽  
Vol 13 (1) ◽  
pp. 171-183 ◽  
Author(s):  
K.V. Karpinskii ◽  
T.V. Gizhuk ◽  
N.V. Kiselnikova
Keyword(s):  
Pearson Correlation ◽  
Statistical Processing ◽  
Point Of View ◽  
Personal Meaning ◽  
Mean Values ◽  
Correlation Criterion ◽  
The Mean ◽  
Scheffe Method ◽  
Post Hoc ◽  
Regulatory Functions

The purpose of this study was to determine the functional potential of various types of personal meaning of the profession. The article describes the results of an empirical study that involved a sample of 647 subjects. As methods of mathematical-statistical processing were used: the Pearson correlation criterion, one-way analysis of variance, followed by post hoc comparison of the mean values of groups by the Scheffe method, the criterion GT-Vegeliusa. The analysis made it possible to identify the optimal, suboptimal and pessimistic personal meaning of the profession from the point of view of its regulatory functions.

Platelet Activation in Muscle Contraction Headache and Migraine

Cephalalgia ◽  
1987 ◽  
Vol 7 (4) ◽  
pp. 239-243 ◽  
Author(s):  
Takao Takeshima ◽  
Tokio Shimomura ◽  
Kazuro Takahashi
Keyword(s):  
Muscle Contraction ◽  
Platelet Activation ◽  
Mean Value ◽  
Point Of View ◽  
Healthy Controls ◽  
Platelet Factor ◽  
Mean Values ◽  
Migraine Group ◽  
The Mean

In migraine, the role of platelets is regarded as an important factor. We investigated plasma beta-thromboglobulin (BTG), platelet factor 4 (PF4), and 5-hydroxytryptamine (5-HT) in migraine patients and muscle contraction headache (MCH) patients during headache-free periods. The mean values of the plasma BTG, PF4, and 5-HT concentrations in the migraine group and the MCH group were significantly higher than those in healthy controls. The mean value of the plasma BTG concentration was significantly higher in the migraine group than in the MCH group, but the differences in the mean plasma PF4 and 5-HT concentrations between the two groups were not significant. Continuous platelet activation exists in both MCH patients and migraine patients. From the biochemical point of view, we have provided evidence for a similarity between migraine and MCH.

Articulatory Behavior Pre and Post Full-Mouth Tooth Extraction and Alveoloplasty

1980 ◽  
Vol 23 (3) ◽  
pp. 630-645 ◽  
Author(s):  
Gerald Zimmermann ◽  
J.A. Scott Kelso ◽  
Larry Lander
Keyword(s):  
Control Subject ◽  
High Speed ◽  
Tooth Extraction ◽  
Kinematic Parameters ◽  
Experimental Conditions ◽  
Mean Values ◽  
Articulatory Movements ◽  
The Mean ◽  
Experimental Subjects ◽  
Normal Speech

High speed cinefluorography was used to track articulatory movements preceding and following full-mouth tooth extraction and alveoloplasty in two subjects. Films also were made of a control subject on two separate days. The purpose of the study was to determine the effects of dramatically altering the structural dimensions of the oral cavity on the kinematic parameters of speech. The results showed that the experimental subjects performed differently pre and postoperatively though the changes were in different directions for the two subjects. Differences in both means and variabilities of kinematic parameters were larger between days for the experimental (operated) subjects than for the control subject. The results for the Control subject also showed significant differences in the mean values of kinematic variables between days though these day-to-day differences could not account for the effects found pre- and postoperatively. The results of the kinematic analysis, particularly the finding that transition time was most stable over the experimental conditions for the operated subjects, are used to speculate about the coordination of normal speech.

Comparative Study of Intranasal, Subcutaneous and Intravenous Administration of Desamino-D-Arginine Vasopressin (DDAVP)

1986 ◽  
Vol 55 (01) ◽  
pp. 108-111 ◽  
Author(s):  
M Köhler ◽  
P Hellstern ◽  
C Miyashita ◽  
G von Blohn ◽  
E Wenzel
Keyword(s):  
Factor Viii ◽  
Von Willebrand Factor ◽  
Factor Xii ◽  
Additional Advantage ◽  
Mean Values ◽  
Routes Of Administration ◽  
The Mean ◽  
Von Willebrand ◽  
Willebrand Factor ◽  
Factor Antigen

SummaryThis study was performed to evaluate the influence of different routes of administration on the efficacy of DDAVP treatment. Ten healthy volunteers received DDAVP intranasally (i.n.), subcutaneously (s.c.) and intravenously (i.v.) in a randomized cross-over trial. Factor XII and high molecular weight (HMW)-kininogen levels increased only slightly after DDAVP administration. The mean increase of factor VIII: C was 3.1 (i. v.), 2.3 (s. c.), and 1.3 (i.n.) - fold over baseline. Ristocetin cofactor (von Willebrand factor antigen) increased 3.1 (2.5), 2.0 (2.3) and 1.2 (1.2) - fold over baseline mean values after i.v., s.c. and i.n. DDAVP, respectively. The half-disappearance time of factor VIII and von Willebrand factor (vWF) after DDAVP ranged from five (factor VIII: C) to eight hours (vWF). The mean increase of fibrinolytic activity was more pronounced after i.v. DDAVP. The antidiuretic effect was moderate with no apparent differences between the routes of application. This study provides further evidence that both i.v. and s.c. DDAVP administration result in an appropriate and reliable stimulation of haemostasis. An additional advantage of s. c. administration is its suitability for home treatment.

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