scholarly journals Quantitative distribution of human exhaled particles in a ventilation room

2021 ◽  
Author(s):  
Zhijian Liu ◽  
Hangyao Zhu ◽  
Yangfan Song ◽  
Guoqing Cao
Keyword(s):  
Quantitative Distribution

ACCUMULATION OF PLASTIC FRAGMENTS AND MICROPLASTICS ON THE BEACHES IN THE SOUTH-EAST BALTIC SEA

2017 ◽  
Author(s):  
Lilia Khatmullina ◽  
Lilia Khatmullina ◽  
Elena Esiukova ◽  
Elena Esiukova
Keyword(s):  
Baltic Sea ◽  
Size Range ◽  
Anthropogenic Pollution ◽  
The South ◽  
The Baltic Sea ◽  
Quantitative Distribution ◽  
Sediment Sampling ◽  
Beach Sediments ◽  
Kaliningrad Region ◽  
The Baltic

The sediment sampling from different areas of the beaches in the south-eastern part of the Baltic Sea (in Kaliningrad region) was executed for the purpose of studying the quantitative and qualitative composition of the microplastics particles (range 0.5-5 mm). Preference is given to those beaches that are exposed to maximum anthropogenic pollution. From June, 2015 to January, 2016, there were 14 expeditions along the coastline of the Baltic Sea (in Kaliningrad region) to collect experimental materials. The majority of samples were collected on the most recent flotsam deposited at “wracklines”, in the supralittoral zone. The primary examination of those samples revealed the presence of abundant microplastic particles of the required size range (0.5-5 mm). Quantitative distribution of microplastics in beach sediments was obtained in milligrams per gram of sediment and milligrams per m2: on average 0.05-2.89 (mg per gram of sediment) and 370-7330 (mg per m2), accordingly.

scholarly journals PATHOGENESIS OF COXSACKIE VIRUS INFECTION

1951 ◽  
Vol 93 (3) ◽  
pp. 247-266 ◽  
Author(s):  
Joseph L. Melnick ◽  
Gabriel C. Godman
Keyword(s):  
Virus Infection ◽  
Striated Muscle ◽  
Virus Titer ◽  
Coxsackie Virus ◽  
Quantitative Distribution ◽  
Virus Level ◽  
Coxsackie Virus Infection ◽  
Muscle Necrosis ◽  
Old Mice ◽  
Different Tissues

The quantitative distribution of the Conn.-5 strain of Coxsackie virus in different tissues was determined by serial titration at intervals after inoculation of 4 to 5 day old mice. High titers were reached by the 2nd day in blood, heart, liver, muscle, intestine, and its contents, and these were maintained through the 8th day, except for the blood, in which the virus level fell earlier. In paralyzed mice, muscle and brain attained the highest titers and it was in these tissues alone that virus persisted through the 9th day of illness. The pathology of the infection has been briefly described. In particular, the evolution of morbid changes in striated muscle was correlated with the concentrations of virus in muscle. Acute muscle necrosis first occurred when there was a peak viral concentration (4th day), and reached maximal intensity on the 8th day. Scattered acute lesions continued to appear while the virus titer remained above 10–4, from the 9th to 12th day. With the decrease in the myositis, there was a concomitant decrease in the incidence of perceptible disease. Inflammation was found to follow upon the development of necrosis, and subsided slowly. Regeneration began very early, became exuberant, and led finally to restitution of the muscle.

The Qualitative and Quantitative Distribution of Plankton in the Strait of Georgia in Relation to Certain Oceanographic Factors

1957 ◽  
Vol 14 (4) ◽  
pp. 521-552 ◽  
Author(s):  
Joseph Eugène Henri Légaré
Keyword(s):  
Salinity Gradient ◽  
General Distribution ◽  
Fraser River ◽  
Strait Of Georgia ◽  
Quantitative Distribution ◽  
Qualitative And Quantitative ◽  
Chemical Factors ◽  
Physical And Chemical ◽  
Plankton Communities ◽  
Made In

In order to gain some picture of the seasonal variations in the plankton communities two cruises were made in the Strait of Georgia, one in June 1955, and the other in November 1955; 165 plankton collections were taken, also surface temperatures.The correlation of these data have resulted in a number of conclusions concerning the distribution of plankton in the Strait of Georgia. The chief factor affecting the general distribution of plankton is the salinity gradient. The inflow of fresh water from the Fraser River forms zones of varying properties, and leads to the development of different plankton communities. The extent to which physical and chemical factors may determine the presence or absence of certain organisms from the zones described is discussed.

scholarly journals The Humidity Behaviour of the Mealworm Beetle, Tenebrio Molitor L

1940 ◽  
Vol 17 (3) ◽  
pp. 295-306
Author(s):  
D. P. PIELOU
Keyword(s):  
Experimental Work ◽  
Tenebrio Molitor ◽  
Locomotory Activity ◽  
Gradual Reduction ◽  
Quantitative Distribution ◽  
Mealworm Beetle ◽  
Maxillary Palps ◽  
Humidity Reaction

1. Removal of both antennae of the mealworm beetle, Tenebrio molitor, completely abolishes the animal's reaction to humidity. Removal of both maxillary palps has no effect on the reaction. 2. The quantitative distribution of the five types of sensillae present along the eleven segments of the antenna is described. Two of these types occur also on the maxillary palps. 3. Progressive symmetrical amputation of antennal segments leads to a gradual reduction of the humidity reaction to zero; there is a reaction with four segments remaining on each side and no reaction when only three segments remain. 4. Asymmetrical amputation of the more basal segments shows that humidity receptors are nevertheless present on these and that a threshold number of sensillae must be left in action before a reaction occurs. 5. The experimental work, taken in combination with observations in the distribution of sensillae, shows that the pit peg organs are hygro-receptive. Either the peg organs or the bristles or both are hygro-receptive as well. It is, however, unlikely that the bristles are hygro-receptive. 6. Experimental work on the locomotory activity of this beetle shows that the conclusions are not invalidated by any general ill effects of amputation of antennae. 7. It is suggested that the hygro-receptors function hygroscopically.

scholarly journals Statistical diagnostics of postmortem artifacts for determination of ethanol concentration

2019 ◽  
Vol 4 (4) ◽  
pp. 58-62
Author(s):  
German V. Nedugov ◽  
Anatoliy P. Ardashkin ◽  
Vladimir G. Nedugov
Keyword(s):  
Ethanol Concentration ◽  
Alcohol Intoxication ◽  
Regression Equations ◽  
Acute Alcohol Intoxication ◽  
Quantitative Distribution ◽  
Physiological Limits ◽  
Automated Method ◽  
Computational Procedures ◽  
Bladder Urine

Objectives - statistical estimation of the physiological limits of the quantitative distribution of ethanol in cadaveric blood and bladder urine and development of an automated method for diagnosing postmortem artifacts of forensic medical examination of acute alcohol intoxication on the corpse. Material and methods. We performed a retrospective statistical analysis of the results of toxicological determination of ethanol concentration in a blood and in the urine in 2376 deaths from acute alcohol intoxication. Results. Regression equations have been developed that allow us to determine the physiological limits of the quantitative distribution of ethanol in blood and urine with any confidence probability for any degree of alcohol intoxication and phase of acute alcohol intoxication. The set of computational procedures is implemented in the format of the computer program "Alcohol calculator Z 3.0". Conclusion. If the concentrations of ethanol in the blood or in the urine are beyond their physiological limits, the results of toxicological analysis should be considered as a postmortem artifact.

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