The Scientific World Journal

https://www.hindawi.com/journals/tswj/

List of Papers (Total 472)

Why Homeodynamics, Not Homeostasis?

Ideas of homeostasis derive from the concept of the organism as an open system. These ideas can be traced back to Heraclitus. Hopkins, Bernard, Hill, Cannon, Weiner and von Bertalanffy developed further the mechanistic basis of turnover of biological components, and Schoenheimer and Rittenberg were pioneers of experimental approaches to the problems of measuring pool sizes and...

Atmospheric Deposition of Nitrogen and Sulphur Compounds in the Czech Republic

Estimates of dry and wet deposition of nitrogen and sulphur compounds in the Czech Republic for the years 1994 and 1998 are presented. Deposition has been estimated from monitored and modeled concentrations in the atmosphere and in precipitation, where the most important acidifying compounds are sulphur diOxide, nitrogen Oxides, ammonia, and their reaction products. Measured...

Evaluating Nitrogen Management Options for Reducing Nitrate Leaching from Northeast U.S. Pastures

Substantial amounts of nitrate nitrogen NO3-N can leach from intensively grazed pasture in the northeast U.S. where there is about 30 cm of groundwater recharge, annually. Management options for reducing NO3-N leaching were evaluated for this environment using the Cornell Net Carbohydrate and Protein System Model and a recently developed nitrogen leaching index. Management...

Indicators of AEI Applied to the Delaware Estuary

We evaluated the impacts of entrainment and impingement at the Salem Generating Station on fish populations and communities in the Delaware Estuary. In the absence of an agreed-upon regulatory definition of “adverse environmental impact” (AEI), we developed three independent benchmarks of AEI based on observed or predicted changes that could threaten the sustainability of a...

Measurement Error Affects Risk Estimates for Recruitment to the Hudson River Stock of Striped Bass

We examined the consequences of ignoring the distinction between measurement error and natural variability in an assessment of risk to the Hudson River stock of striped bass posed by entrainment at the Bowline Point, Indian Point, and Roseton power plants. Risk was defined as the probability that recruitment of age-1+ striped bass would decline by 80% or more, relative to the...

An Update on Blood Pressure Short-Term Variability

This article summarizes current achievements of computer-based methodologies in identifying the constituting components of short-term blood pressure variability and the underlying regulatory mechanisms. It emphasizes the contribution of spectral methodologies in early diagnosis of blood pressure deregulations. Moreover, the effects of antihypertensive drugs, as well as of new...

P2 Receptors and Platelet Activation

Adenosine diphosphate (ADP) plays a crucial role in hemostasis and thrombosis by activating platelets. In platelets, the classical P2T receptor is now resolved into three P2 receptor subtypes: the P2Y1, the P2Y12, and the P2X1 receptors. Both pharmacological and molecular biological approaches have confirmed the role of the P2Y1 and P2Y12 receptors in the ADP-induced platelet...

Isolation of Human Platelets (Thrombocytes)

Platelets from human blood can be isolated in high yield by centrifugation of whole blood over an iodixanol density barrier of 1.063 g/ml. The separation from all of the blood cells (which form a pellet) is based on the slower sedimentation velocity of the smaller platelets.

Induction of Glutathione Synthesis and Glutathione Reductase Activity by Abiotic Stresses in Maize and Wheat

The effect of different abiotic stresses (extreme temperatures and osmotic stress) on the synthesis of glutathione and hydroxymethylglutathione, on the ratio of the reduced to oxidised forms of these thiols (GSH/GSSG, hmGSH/hmGSSG), and on the glutathione reductase (GR) activity was studied in maize and wheat genotypes having different sensitivity to low temperature stress. Cold...

Synthesis of Platinum Complexes from N-Benzyl-2-Aminoethanethiol Derivatives

Twelve new platinum(II) complexes, analogs of cisplatin, containing a 2-aminoethanethiol N-substituted by several benzyl groups have been prepared and characterized in good yields. The ligands were obtained by reaction between 2-aminoethanethiol hydrochloride and different benzyl halides

The Use of Plants for Remediation of Metal-Contaminated Soils

The use of green plants to remove, contain, inactivate, or degrade harmful environmental contaminants (generally termed phytoremediation) is an emerging technology. In this paper, an overview is given of existing information concerning the use of plants for the remediation of metal-contaminated soils. Both site decontamination (phytoextraction) and stabilization techniques...

The Use of Developmental Rehabilitation Services. Comparison between Bedouins and Jews in the South of Israel

Some communities have peripheral zones inhabited by persons with a different culture than the majority of the general population, such as the Aboriginals in Australia, the Native Americans in the U.S. and Canada, the Eskimos in Lapland, and the Bedouins in Israel. These citizens are not receiving the same medical or rehabilitation services as the citizens of the metropolitan...

Physical Fitness and Functional Ability of Children with Intellectual Disability: Effects of a Short-Term Daily Treadmill Intervention

Persons with intellectual disability (ID) and associated multiple disabilities have been found by many researchers to be a population with deficient physical fitness measures, which can be explained by an inactive lifestyle, a result of lack of awareness of the positive physical effects of physical exercise, or lack of motivation for any motor activity. Various plans for physical...

Ruptured Left Gastric Artery Aneurysm Successfully Treated by Thrombin Injection: Case Report and Literature Review

This short report describes the successful use of a new minimally invasive technique for the treatment of acute gastric artery aneurysm rupture. It emphasises the importance of persistence and multiple imaging modalities in the presence of gastrointestinal bleeding. The photographs and case history clearly illustrate the nonoperative management and highlight learning points for...

Clinical Microbiological Aspects of Epileptic Seizures in the Tropical Countries with Specific Focus on Nigeria

Epilepsy is a common neurological disorder; however, in Nigeria and other tropical regions, the causes of epileptic seizures differ greatly in etiology. This paper is an attempt to highlight some possible microbiological aspects of epileptic seizures. A literature review was carried out to identify the extent to which microbial infections were involved in the elicitation of...

A Reassessment of the SIDS Back to Sleep Campaign

The Back to Sleep Campaign was initiated in 1994 to implement the American Academy of Pediatrics

Quality of Life and Events in the First Year of Life. Results from the Prospective Copenhagen Birth Cohort 1959?61

The objective of this paper was to explore the association between diverse factors occurring during the first year of a child?s life and the quality of life later as an adult. The design was a prospective cohort study based on material from the Copenhagen Birth Cohort 1959–61 with 7,222 participants and two sets of questionnaires used: one by a physician during the child's first...