Role of Acacia Spp. In Nutrient Balance and Cycling in Regenerating Eucalyptus regnans F. Muell. Forests. I. Temporal Changes in Biomass and Nutrient Content

1984 ◽  
Vol 32 (2) ◽  
pp. 205 ◽  
Author(s):  
MA Adams ◽  
PM Attiwill
Keyword(s):  
Nutrient Balance ◽  
Nutrient Content ◽  
N Fixation ◽  
Eucalyptus Regnans ◽  
Acacia Species ◽  
Large Numbers ◽  
Calcium Magnesium ◽  
Slash Burning ◽  
Nutrient Conservation

Following severe fire in high-rainfall Eucalyptus regnans forests, several Acacia species may germinate in large numbers. Large amounts of nitrogen, calcium, magnesium and potassium are immobilized in the Acacia biomass, much of which is returned to the soil after canopy closure. Within 3 years of a regeneration burn, 280 kg N ha-1 was in the above-ground Acacia biomass and litter layer. The relative abundance of nitrogen in Acacia spp. is a result of N fixation. The probable rate of N fixation appears significant in relation to losses of nitrogen associated with slash-burning. It is concluded that the Acacia spp. may be important in the secondary succession through nutrient conservation, replacement and redistribution.

Role of Acacia Spp. In Nutrient Balance and Cycling in Regenerating Eucalyptus regnans F. Muell. Forests. II. Field Studies of Acetylene Reduction

1984 ◽  
Vol 32 (2) ◽  
pp. 217 ◽  
Author(s):  
MA Adams ◽  
PM Attiwill
Keyword(s):  
N2 Fixation ◽  
Nutrient Balance ◽  
Sampling Period ◽  
Climatic Conditions ◽  
Severe Drought ◽  
Fresh Weight ◽  
Eucalyptus Regnans ◽  
Acacia Dealbata ◽  
C2h2 Reduction

Rates of C2H2 reduction by nodules of Acacia dealbata growing in 2-year-old Eucalyptus regnans regeneration were determined at monthly intervals for 1 year under field conditions. Intact soil cores containing roots and nodules showed maximum values of 7.1 μmol h-1 g-1 fresh weight of nodules with a mean value of 4.4 μmol h-1 g-1 fresh weight. Nodule mass was clearly related to climatic conditions, being greatest when both temperature and moisture levels were favourable, and was probably depressed during the sampling period by the prevailing severe drought. From the measured rates of C2H2 reduction, estimated N2 fixation was 12-32 kg ha-1 year-1. Rates of N2 fixation as high as this confirm the role of acacias as fast-growing pioneer species important in maintaining the nitrogen pool of the forest ecosystem.

Localization of Intracisternal a Particle Antigens in Neoplastic Cells and Preimplantation Mouse Embryos

1980 ◽  
Vol 38 ◽  
pp. 696-697
Author(s):  
Thomas T.F. Huang ◽  
Patricia G. Calarco
Keyword(s):  
Endoplasmic Reticulum ◽  
Normal Development ◽  
Mouse Embryos ◽  
Neoplastic Cells ◽  
Large Numbers ◽  
Preimplantation Mouse Embryos ◽  
Preimplantation Mouse ◽  
Intracisternal A Particle ◽  
Normal Feature

The stage specific appearance of a retravirus, termed the Intracisternal A particle (IAP) is a normal feature of early preimplantation development. To date, all feral and laboratory strains of Mus musculus and even Asian species such as Mus cervicolor and Mus pahari express the particles during the 2-8 cell stages. IAP form by budding into the endoplasmic reticulum and appear singly or as groups of donut-shaped particles within the cisternae (fig. 1). IAP are also produced in large numbers in several neoplastic cells such as certain plasmacytomas and rhabdomyosarcomas. The role of IAP, either in normal development or in neoplastic behavior, is unknown.

The role of serum calcium, magnesium, and zinc in pregnancy induced hypertension

2019 ◽  
Vol 9 (3) ◽  
pp. 68-72
Author(s):  
Sasikalai Kumari ◽  
◽  
Andal M ◽  
Keyword(s):  
Serum Calcium ◽  
Pregnancy Induced Hypertension ◽  
Induced Hypertension ◽  
Calcium Magnesium ◽  
In Pregnancy

scholarly journals Characterizing Highly Benefited Patients in Randomized Clinical Trials

2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Vivek Charu ◽  
Paul B. Rosenberg ◽  
Lon S. Schneider ◽  
Lea T. Drye ◽  
Lisa Rein ◽  
...  
Keyword(s):  
Randomized Clinical Trials ◽  
Controlled Trial ◽  
New Method ◽  
Usual Model ◽  
Randomized Controlled ◽  
Working Model ◽  
Large Numbers ◽  
High Benefit ◽  
Two Stages

AbstractPhysicians and patients may choose a certain treatment only if it is predicted to have a large effect for the profile of that patient. We consider randomized controlled trials in which the clinical goal is to identify as many patients as possible that can highly benefit from the treatment. This is challenging with large numbers of covariate profiles, first, because the theoretical, exact method is not feasible, and, second, because usual model-based methods typically give incorrect results. Better, more recent methods use a two-stage approach, where a first stage estimates a working model to produce a scalar predictor of the treatment effect for each covariate profile; and a second stage estimates empirically a high-benefit group based on the first-stage predictor. The problem with these methods is that each of the two stages is usually agnostic about the role of the other one in addressing the clinical goal. We propose a method that characterizes highly benefited patients by linking model estimation directly to the particular clinical goal. It is shown that the new method has the following two key properties in comparison with existing approaches: first, the meaning of the solution with regard to the clinical goal is the same, and second, the value of the solution is the best that can be achieved when using the working model as a predictor, even if that model is incorrect. In the Citalopram for Agitation in Alzheimer’s Disease (CitAD) randomized controlled trial, the new method identifies substantially larger groups of highly benefited patients, many of whom are missed by the standard method.

scholarly journals Precipitation of Calcium, Magnesium, Strontium and Barium in Tissues of Four Acacia Species (Leguminosae: Mimosoideae)

PLoS ONE ◽  
2012 ◽  
Vol 7 (7) ◽  
pp. e41563 ◽  
Author(s):  
Honghua He ◽  
Timothy M. Bleby ◽  
Erik J. Veneklaas ◽  
Hans Lambers ◽  
John Kuo
Keyword(s):  
Acacia Species ◽  
Calcium Magnesium

Beta-Blocker Attenuates Cardiotoxicity Related Anthracycline Usage

2021 ◽  
Vol 104 (8) ◽  
pp. 1389-1392
Keyword(s):  
Side Effects ◽  
Cancer Therapy ◽  
Mortality Rate ◽  
Cancer Patients ◽  
Beta Blocker ◽  
The Other ◽  
Large Numbers ◽  
Therapy Effectiveness ◽  
Chemotherapy Agents

To summarize the recent trials and studies of the role of beta-blocker on the treatment for cancer patients treated with anthracycline to decrease morbidity and mortality rate. Good management of cancer will result in large numbers of cancer survivors. On the other hand, cancer therapy also has side effects, one of which is cardiotoxicity. Cardiotoxicity could reduce therapy effectiveness, hence, increase disease progression and mortality rate. Anthracyclines is one of the chemotherapy agents with cardiotoxicity as a side effect. Beta-blocker has the ability to reduce cardiotoxicity due to anthracyclines usage. Keywords: Beta-blocker; Cardiotoxicity; Anthracyclines

Protozoa abundance, growth, and bacterivory in the water column, on sedimenting particles, and in the sediment of Halifax Harbor

1990 ◽  
Vol 36 (12) ◽  
pp. 859-863 ◽  
Author(s):  
James A. Novitsky
Keyword(s):  
Bacterial Community ◽  
Water Column ◽  
Sediment Surface ◽  
Metabolic Inhibitor ◽  
Optimum Conditions ◽  
Bacterial Populations ◽  
Protozoan Grazing ◽  
Large Numbers ◽  
Doubling Times

The role of protozoan grazing in controlling bacterial populations was examined in four microbial habitats in Halifax Harbor, Canada: the water column, setting particles, the sediment–water interface, and the sediment. Large numbers of protozoans were found in all habitats although most (>56%) were small (<5 μm) flagellates. Protozoans larger than 10 μm were rarely observed; protozoans >20 μm were never observed. Protozoans were also observed to a depth of 9 cm below the sediment surface although efforts to culture viable protozoa failed except for the top 1 cm. The use of the metabolic inhibitor cycloheximide with and without colchicine to selectively inhibit eucaryotic metabolism was shown to severely affect procaryotic metabolism in sediment (and presumably particle and water) samples. Using fluorescently labelled bacteria as food, and under optimum conditions, up to 42% of the Protozoa population exhibited active grazing within 7 h. Using protozoan and bacterial community sizes and doubling times, it was calculated that each protozoan in Halifax Harbor would have to consume 13–118 bacteria per hour for the enumerated nanoplanktonic (<20 μm) Protozoa to be the sole control of the size of the bacterial community. Key words: marine, Protozoa, bacterivory, particles, bacteria.

The Role of Calcium, Magnesium, and Zinc in Carcinogenesis

1986 ◽  
pp. 497-515 ◽  
Author(s):  
Kazimierz S. Kasprzak ◽  
Michael P. Waalkes
Keyword(s):  
Calcium Magnesium

Illness and Mortality

2017 ◽  
Author(s):  
Golfo Alexopoulos
Keyword(s):  
Health Data ◽  
Large Numbers ◽  
Reported Health

This chapter discusses the role of the Gulag medical-sanitation department. Their task was not necessarily to keep prisoners healthy, but to maximize exploitation and minimize “labor losses.” The Gulag routinely reported health data under the heading “illness and lost labor.” Inmate health was only relevant as it impacted production. The Stalinist leadership established quotas on illnesses and deaths, and would not tolerate large numbers of non-working prisoners. The Stalinist leadership called this “labor therapy,” and believed in work as the key to convalescence. Although sickness, emaciation, and disability were widespread, Gulag officials concealed their existence. In the Gulag, illness was widespread, yet it remained largely untreated, concealed, and even criminalized.

scholarly journals COMPORTAMENTO ESPACIAL DA FUSARIOSE E DOS ATRIBUTOS DO SOLO NO CULTIVO DA PIMENTA-DO-REINO

Nativa ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 113
Author(s):  
Carla Da Penha Simon ◽  
Ana Carolina Lyra Brumat ◽  
Marcelo Barreto Da Silva ◽  
Bernardo Torres Olmo ◽  
Edney Leandro da Vitória ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Texture ◽  
Fusarium Solani ◽  
Nutrient Content ◽  
Black Pepper ◽  
Irregular Sampling ◽  
Piper Nigrum ◽  
Soil Attributes ◽  
Calcium Magnesium ◽  
Chemical Attributes

A pimenta-do-reino é a especiaria mais consumida no mundo e o Brasil destaca-se como um dos maiores produtores. Um dos grandes limitantes no seu cultivo é a fusariose (Fusarium solani f. sp. piperis). Objetivou-se com a realização deste estudo caracterizar a variabilidade espacial da fusariose em pimenta-do-reino, verificando a existência de relação com os atributos físicos e químicos do solo. O estudo foi desenvolvido em uma lavoura localizada no município de São Mateus-ES, na qual foi estabelecida uma malha amostral irregular com 79 pontos, abrangendo uma área de um hectare.  Para a amostragem da fusariose foi realizado um levantamento, onde uma planta por ponto da malha amostral foi classificada em sadia, doente ou morta.  Os atributos do solo amostrados foram: pH em H2O, matéria orgânica, cálcio, magnésio, potássio e textura do solo. Os dados foram analisados através da estatística descritiva e ferramentas da geoestatística. Os semivariogramas ajustados apresentaram uma forte dependência espacial para as variáveis intensidade da fusariose, altimetria, matéria orgânica, textura do solo, pH, cálcio, magnésio potássio (89, 94, 92, 94, 93, 91, 100 e 85 % respectivamente). Os mapas gerados indicam que não há relação da intensidade da fusariose com os atributos do solo estudados no experimento.Palavra-chave: epidemiologia, Fusarium solani f. sp. piperis, geoestatística, Piper nigrum L. SPATIAL ANALYSIS OF FUSARIOSE AND SOIL ATTRIBUTES IN THE BLACK PEPPER CULTIVATION  ABSTRACT:Black pepper is the most consumed spice in the world, Brazil stands out as one of the largest producers. One of the major constraints in cultivation is fusariosis (Fusarium solani f. Piperis). The objective of this study was characterize the spatial variability of fusariosis in black pepper and verify the relationship of chemical attributes of the soil. The study was developed in a tillage located in the municipality of São Mateus - ES, which exist an irregular sampling network was established with 79 points, covering an area of one hectare. For the sampling of fusariosis intensity, the survey was performed, where one plant per point of the sample mesh was classified as healthy, symptomatic or dead. The attributes of the soil sampled were: pH in H2O, organic matter, nutrient content (calcium, magnesium, potassium) and soil texture. Data were analyzed through descriptive statistics and geostatistics tools. The adjusted semivariograms indicated a strong spatial dependence for the variables intensity of fusariosis, altimetry, organic matter, soil texture, pH, calcium, potassium magnesium (89, 94, 92, 94, 93, 91, 100 and 85%, respectively). The generated maps indicate that there is no relation between the incidence of fusariosis and the soil attributes studied in the experiment.Keywords: epidemiology, Fusarium solani f. sp. piperis, geostatistics, Piper nigrum L. DOI:

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