scholarly journals Bark necrotic disease in a beech thicket

2019 ◽  
Vol 55 (No. 3) ◽  
pp. 181-190
Author(s):  
Milan Barna ◽  
Ivan Mihál
Keyword(s):  
Health Status ◽  
Linear Correlation ◽  
Western Carpathians ◽  
Regenerative Capacity ◽  
Lateral Shoot ◽  
Disease Characteristics ◽  
Negative Linear Correlation ◽  
Research Experiment ◽  
Terminal Shoot

Symptoms of non-specific bark necroses in beech trees of all ages have lately been described. We investigated the occurrence of bark necrotic disease in beech thicket and health status of the trees. Our objective was to examine how bark necrotic wounds persist and the regenerative potential of young beech thicket. The research experiment was carried out at two isolated localities in the Western Carpathians in the period 2015–2017. A terminal shoot (stem) and a lateral shoot (branch) of each of the 30 sampled beech trees were examined. Young beech stands were affected by the necrotic disease in 87–94% cases (stems 69–83%, branches 33–56%). Shoot diameter and age had a significantly negative linear correlation (P < 0.05) with the development of all analysed disease characteristics on the beech bark. The encouraging finding is a positive regenerative capacity of young beech trees. Over the same period more annual shoots were healed in comparison with those that were newly infected (10.8% on stems and 0.6% on branches). 

Analysis of the Flagellar Beat Pattern of Male Ectocarpus Siliculosus Gametes (Phaeophyta) in Relation to Chemotactic Stimulation by Female Cells

1981 ◽  
Vol 92 (1) ◽  
pp. 53-66
Author(s):  
ANNETTE GELLER ◽  
DIETER G. MÜLLER
Keyword(s):  
Linear Correlation ◽  
Mode Of Action ◽  
High Speed ◽  
Sex Attractant ◽  
Cell Axis ◽  
Ectocarpus Siliculosus ◽  
Bending Waves ◽  
Flagellar Beat ◽  
Beat Pattern ◽  
Negative Linear Correlation

Heterocontic male Ectocarpus siliculosus gametes respond to the sex-attractant ectocarpen by changing their locomotive behaviour. However, the mode of action of the flagella is not changed by the presence of ectocarpen. High-speed cinemicrography shows that gametes moving close to a coverglass perform planar bending waves with their front flagellum. Straight or slightly curved swimming paths are generated by enhanced upward bends of the front flagellum to compensate for the asymmetrical insertion of both flagella. Narrower curves are connected with increasing downward bends of the front flagellum. There is a negative linear correlation between the average deflexion of the front flagellum (μm) from the cell axis and the radius of track (correlation coefficient 0.94). Additionally, freely swimming gametes exhibit elliptical and rotary wave motions, suggesting a relationship between thigmotaxis and mode of action of the front flagellum. The rigid hind flagellum performs one rapid sideward beat when the gametes swim in narrow curves. This appears to provide a steering function.

Clonal susceptibility and the influence of shade trees on the incidence of Glyptotermes dilatatus (Bugnion & Popoff) (Isoptera: Kalotermitidae) in tea

1980 ◽  
Vol 70 (1) ◽  
pp. 145-149 ◽  
Author(s):  
P. Sivapalan ◽  
A. A. C. Karunaratne ◽  
D. G. S. Jayatilleke
Keyword(s):  
Sri Lanka ◽  
Linear Correlation ◽  
Gliricidia Sepium ◽  
Percentage Change ◽  
Shade Trees ◽  
Steep Increase ◽  
Negative Linear Correlation ◽  
Termite Attack ◽  
The Mean ◽  
Criteria For Selection

AbstractAmongst 20 tea clones tested in Sri Lanka for susceptibility to Glyptotermes dilatatus (Bugnion & Popoff), five of the high-yielding soft-wooded clones, including the currently recommended and popular TRI 2023 and TRI 2026, were found very susceptible and to suffer a severe net loss in yield. A highly significant negative linear correlation was observed between the mean infestation percentage of clone with an infestation of over 30% and the mean percentage change in yield. In general, the high-yielding clones with soft-wooded sappy frames were particularly susceptible to termite attack. Since yield is one of the important criteria for selection, it is suggested that in areas prone to termite infestation, replanting should be limited to the high-yielding resistant clones such as GMT 9, KEN 16/3 and DG 39. The provision of shade with Gliricidia sepium may have prevented a steep increase in the incidence of infestation in the susceptible clones.

Population dynamics of Xyleborus fornicatus Eichhoff (Coleoptera: Scoly-tidae) in relation to yield trends in tea

1977 ◽  
Vol 67 (2) ◽  
pp. 329-335 ◽  
Author(s):  
P. Sivapalan
Keyword(s):  
Linear Correlation ◽  
Inverse Relationship ◽  
Direct Relationship ◽  
Critical Factor ◽  
Cambial Activity ◽  
Crop Size ◽  
Negative Linear Correlation ◽  
Weather Parameters ◽  
Yield Trends ◽  
Tea Plants

AbstractA highly significant negative linear correlation (r=– 0·911, P=0·001) was observed between Xyleborus fornicatus Eichh. population levels in tea plants and the crop size in the preceding month. A highly significant negative linear correlation (r=– 0·858, P=0·001) was also observed between Xyleborus population levels and the percentage of healed galleries of the respective samples. Cambial activity, which has a direct relationship with crop size, determines the rate of healing of brood galleries, and this seems to be the critical factor that regulates population size within a pruning cycle. Since the population has an inverse relationship to crop size and as the latter could be predicted in advance using weather parameters, it should be possible to predict population levels of Xyleborus in advance.

scholarly journals 067 SHOOT ORIENTATION AFFECTS PEACH SHOOT AND FRUIT GROWTH

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 437e-437
Author(s):  
Paula M. Gross ◽  
Stephen C. Myers
Keyword(s):  
Prunus Persica ◽  
Fruit Size ◽  
Initial Orientation ◽  
Color Intensity ◽  
Lateral Shoot ◽  
Color Development ◽  
Naturally Occurring ◽  
Red Color ◽  
Terminal Shoot ◽  
One Year

One-year old fruiting shoots averaging 50 cm in length were tagged according to naturally-occurring orientations ranging from vertical to horizontal throughout the canopies of dormant `Encore' peach (Prunus persica L Batsch) trees. Following fruit set, tagged shoots were thinned to two or three fruit per shoot. Fruit diameter, terminal shoot extension, and shoot orientation were measured at intervals throughout the season. Fruit were harvested at uniform maturity based on ground color for assessment of fresh weight, diameter, percent red blush, and red color intensity. A linear relationship (p=.001) was found between final fruit size and initial orientation, with fruit diameters 6 percent larger on shoots initially oriented horizontally than those initially vertical. Fruit size differences were not detected until the last two to three weeks of growth. Fruit size response to orientation was found to be independent of light. Red color development was not influenced, probably due to fairly uniform light environments within the canopies. Terminal shoot length was linearly related to initial orientation, with shoots initially oriented horizontally having the least terminal shoot extension. Development of lateral shoot growth in relation to shoot orientation will be discussed.

scholarly journals Spatial-temporal pattern of tuberculosis in adolescents

2020 ◽  
Vol 14 ◽  
Author(s):  
Paula Daniella de Abreu ◽  
Firley Poliana da Silva Lúcio ◽  
Mariana Rayane Emidio Bezerra ◽  
Ednaldo Cavalcante de Araújo ◽  
Eliane Maria Ribeiro de Vasconcelos ◽  
...  
Keyword(s):  
Linear Correlation ◽  
Temporal Pattern ◽  
Spatial Association ◽  
Age Groups ◽  
Temporal Correlation ◽  
Nursing Intervention ◽  
Incidence Rates ◽  
Negative Linear Correlation ◽  
Intervention Planning ◽  
Los Grupos

Objetivo: analisar o padrão espaço-temporal dos casos notificados de tuberculose em adolescentes. Método: trata-se de um estudo ecológico desenvolvido a partir dos casos de tuberculose em adolescentes. Obtiveram-se a correlação temporal entre as taxas brutas de incidência da tuberculose e o ano de ocorrência segundo o coeficiente de correlação linear de Pearson e a autocorrelação espacial pelo índice de Moran. Realizou-se a análise no programa TerraView, versão 4.2.2. Resultados: revela-se que o Índice de Moran apresentou associação espacial. Levantaram-se correlação linear negativa moderada e baixa entre as variáveis representadas pelas taxas brutas e ano de ocorrência, segundo faixas etárias, dos dez aos 14 e dos 15 aos 19 anos, respectivamente. Conclusão: indica-se, pela autocorrelação espacial, a existência de municípios prioritários para intervenção e planejamento de ações da Enfermagem. Descritores: Tuberculose; Educação em Saúde; Análise Espacial; Adolescente; Enfermagem; Doenças Negligenciadas.AbstractObjective: to analyze the spatial-temporal pattern of notified cases of tuberculosis in adolescents. Method: this is an ecological study developed from tuberculosis cases in adolescents. The temporal correlation between the crude tuberculosis incidence rates and the year of occurrence was obtained according to Pearson's linear correlation coefficient and the spatial autocorrelation by the Moran index. The analysis was performed using the TerraView program, version 4.2.2. Results: it is revealed that the Moran Index showed a spatial association. A moderate and low negative linear correlation was found between the variables represented by the gross rates and year of occurrence, according to age groups, from 10 to 14 and from 15 to 19 years, respectively. Conclusion: the existence of priority municipalities for nursing intervention planning and actions is indicated by spatial autocorrelation.Descriptors: Tuberculosis; Health Education; Spatial Analysis; Adolescent; Nursing; Neglected Diseases.ResumenObjetivo: analizar el patrón espacio-temporal de casos notificados de tuberculosis en adolescentes. Método: estudio ecológico, desarrollado a partir de casos de tuberculosis en adolescentes. La correlación temporal entre las tasas brutas de incidencia de tuberculosis y el año de ocurrencia se obtuvo de acuerdo con el coeficiente de correlación lineal de Pearson y la autocorrelación espacial utilizando el índice de Moran. El análisis se realizó con el programa TerraView, versión 4.2.2. Resultados: el Índice de Moran mostró una asociación espacial. Se obtuvo una correlación lineal negativa moderada y baja entre las variables representadas por las tasas brutas y el año de ocurrencia, según los grupos de edad, 10 a 14 y 15 a 19 años, respectivamente. Conclusión: la autocorrelación espacial indica la existencia de municipios prioritarios para la intervención y la planificación de acciones de enfermería. Descriptores: Tuberculosis; Educación en Salud; Análisis Espacial; Adolescente; Enfermería; Enfermedades Desatendidas.

Effect of daylength and temperature on introduced legumes and grasses for the tropics and subtropics of coastal Australia. 2. N-concentration, estimated digestibility and leafiness

1975 ◽  
Vol 15 (73) ◽  
pp. 256 ◽  
Author(s):  
Mannetje L t
Keyword(s):  
Linear Correlation ◽  
Linear Relation ◽  
Dry Matter Digestibility ◽  
N Concentration ◽  
Whole Plant ◽  
Tropical Legumes ◽  
Negative Linear Correlation ◽  
Positive Linear Correlation ◽  
Varied Response ◽  
The Tropics

Twelve legumes and eight grasses were grown from seed in controlled environment rooms at 14 hours daylength and daylnight temperatures of 32�/24�C. After 35 days the plants were cut and the following regimes were imposed-I : 14 hours, 32�/24�C ; 2 : 14 hours, 26�/15�C ; 3 : 11 hours, 26�/15�C; 4: 11 hours, 20�/6�C. Regimes 1 and 4 represent approximate summer and winter conditions in coastal Queensland, excluding frosts. A complete nutrient application, except nitrogen, was made to the legumes. Three regrowth harvests were obtained at 28 day intervals. There were few differences between primary growth and regrowth in N-concentration and estimated dry matter digestibility (DMD) of whole plant tops. The N-concentration and DMD of regrowth of all grasses increased as the conditions became less tropical. The legumes had a varied response, but there was little regime effect on N and DMD in Trifolium repens and T. semipilosum. Many of the tropical legumes made little or no regrowth in regime 4, but differences in N and DMD were small and inconsistent between other regimes. The legumes showed a general trend towards increased leafiness as conditions became less tropical, but in the grasses there was no consistent response, although nearly all had a higher percentage leaves in regime 4 than in 1. N concentration of the leaves of all legumes and of most grasses was higher than that of stems, but DMD of stems was higher than that of leaves in T. repens, T. semipilosum and Pennisetum clandestinum. N concentration of legume leaves was little affected by regime, but that of grasses was much higher in regime 4 than in the others. Stems of legumes showed a varied response in N and DMD, as did DMD of grass stems, but the latter generally tended to increase in N with decreasing temperature and daylength. N-concentration and DMD of the grasses had a negative linear correlation with DM yield, and most grasses a positive linear correlation between DMD and N-concentration. Of the legumes only M. sativa and Pueraria phaseoloides had a negative linear relation between DMD and DM yield and M. sativa a positive linear relation between DMD and N.

Mineralogical and Geochemistry Study of Darnah Formation in Wadi Al Kharsha, Northeast Libya

2021 ◽  
pp. 98-108
Author(s):  
Ali M. Elfeituri ◽  
Ibrahim M. Abou El Leil ◽  
Salah S. El-Elkhfifi
Keyword(s):  
Correlation Coefficient ◽  
Linear Correlation ◽  
Significant Relationship ◽  
Strong Correlation ◽  
Mineralogical Composition ◽  
Raw Material ◽  
Average Value ◽  
Negative Linear Correlation ◽  
Cement Manufacture ◽  
The Relationship

This paper has been carried out to determine the mineralogical and geochemical characteristics of Eocene Darnah limestone which outcrops at Wadi Al Kharsha as an example of the Darnah Formation. The most conspicuous phenomenon is the upward increase of the dolomitization process, whereas, the dolomite content ranges from 4.34 to 15.48 % with an average value of 8.99%. The lime (CaO) represents the major predominant with a high content (48.08%), it can be blend with other carbonates to improve its quality to meet the specifications of raw material for cement manufacture. The relationship between calcium (CaO) and magnesium (MgO) exhibits a significantly strong negative linear correlation coefficient (R2 = 0.967), which emphasizes the dolomitization process, while the relationship between SiO2 and Al2O3 is a positive linear significant relationship with a strong correlation coefficient (R2 = 0.98), whereas, the SiO2 increases with increasing of Al2O3. The calculated mineralogical composition revealed that halite, gypsum, and hematite are considered to be minor constituents, almost less than 1.0%. Keywords: Limestone; Darnah Formation; Mineralogy; Geochemistry; Dolomitization; Characterizations; Cement

The Optimal Extraction Path of Exhaustible Resource with Environment Cost

2013 ◽  
Vol 807-809 ◽  
pp. 873-879
Author(s):  
Shu Zhi Yao ◽  
Xiao Xia Yan ◽  
Jin Suo Zhang
Keyword(s):  
Optimal Control ◽  
Linear Correlation ◽  
Optimal Control Theory ◽  
Environmental Cost ◽  
Exhaustible Resource ◽  
Negative Linear Correlation ◽  
The Social ◽  
Positive Linear Correlation ◽  
Environment Cost ◽  
Special Case

Assuming in the perfectly competitive market, using the optimal control theory and making the social welfare as the maximization target, the paper studies on environment cost which impacts the optimal extraction path of exhaustible resource. The special case result shows that: the time of optimal exhaustion increases with the addition of marginal environmental cost, the price has negative linear correlation with the marginal environmental cost, and the optimal extraction has positive linear correlation with the marginal environmental cost.

Enzymatic and bactericidal activity of myeloperoxidase in conditions of halogenative stress

2018 ◽  
Vol 96 (5) ◽  
pp. 580-591 ◽  
Author(s):  
Tatyana V. Vakhrusheva ◽  
Daria V. Grigorieva ◽  
Irina V. Gorudko ◽  
Alexey V. Sokolov ◽  
Valeria A. Kostevich ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bactericidal Activity ◽  
Linear Correlation ◽  
Secondary Products ◽  
Primary Products ◽  
Heme Degradation ◽  
Halogenative Stress ◽  
Negative Linear Correlation ◽  
Reactive Halogen Species ◽  
Halogen Species

Myeloperoxidase (MPO), found mainly in neutrophils, is released in inflammation. MPO produces reactive halogen species (RHS), which are bactericidal agents. However, RHS overproduction, i.e., halogenative stress, can also damage host biomolecules, and MPO itself may be targeted by RHS. Therefore, we examined the susceptibility of MPO to inactivation by its primary products (HOCl, HOBr, HOSCN) and secondary products such as taurine monochloramine (TauCl) and taurine monobromamine (TauBr). MPO was dose-dependently inhibited up to complete inactivity by treatment with HOCl or HOBr. TauBr diminished the activity but did not eliminate it. TauCl had no effect. MPO became inactivated when producing HOCl or HOBr but not HOSCN. Taurine protected MPO against inactivation when MPO was catalyzing oxidation of Cl− to HOCl, whereas taurine failed to prevent inactivation when MPO was working with Br−, either alone or in combination with Cl−. SCN− interfered with HOCl-mediated MPO inhibition. UV–vis spectra showed that heme degradation is involved in HOCl- and HOBr-mediated MPO inactivation. A negative linear correlation between the remaining chlorinating activity of HOCl- or HOBr-modified MPO and Escherichia coli survival upon incubation with MPO/H2O2/Cl− was found. This study elucidated the possibility of MPO downregulation by MPO-derived RHS, which could counteract halogenative stress.

Liver heat production and temperature regulation in the anesthetized dog

1979 ◽  
Vol 237 (5) ◽  
pp. R334-R339 ◽  
Author(s):  
P. Baconnier ◽  
G. Benchetrit ◽  
M. Tanche
Keyword(s):  
Ambient Temperature ◽  
Heat Production ◽  
Linear Correlation ◽  
Temperature Regulation ◽  
Thermal Conditions ◽  
Calorimetric Method ◽  
Ambient Temperatures ◽  
Blood Flows ◽  
Physiological Range ◽  
Negative Linear Correlation

Liver heat production (LHP) was measured in the anesthetized dog by a new calorimetric method. Blood flows and temperatures were measured at the same points. The method avoided damage of liver innervation and vascularization. Changes of LHP were investigated under different thermal conditions. Measurements at controlled arterial temperatures within the physiological range showed changes of LHP when arterial temperature was randomly increased or decreased. When measured LHP was compared in experiments carried out at different ambient temperatures, a negative linear correlation was found between LHP and the ambient temperature. It was concluded that liver heat production may be a factor in temperature regulation.

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