Observations on Some Pacific Diatoms as the Food of Copepods and Fishes

1937 ◽  
Vol 3 (1) ◽  
pp. 12-19 ◽  
Author(s):  
Charles W. Lowe
Keyword(s):  
Chum Salmon ◽  
Oncorhynchus Keta ◽  
Food Chains ◽  
Pacific Herring ◽  
Ophiodon Elongatus ◽  
Platichthys Stellatus ◽  
The Common ◽  
Almost All ◽  
Parophrys Vetulus ◽  
Ling Cod

An investigation to determine what species of diatoms are used as food by different species of copepods: Calanus tonsus, Euchaeta japonica, Metridia lucens, Harpacticus uniremis, and Diosaccus spinatus. Also to determine the food chains between diatoms, copepods, and the following fish: Pacific herring, Clupea pallasii; chum salmon, Oncorhynchus keta; spring salmon, O. tschawytscha; dogfish, Squalus suckleyi; ling cod, Ophiodon elongatus; rockfish, Sebastodes caurinus; starry flounder, Platichthys stellatus; lemon sole, Parophrys vetulus; yellow-finned surffish, Damalichthys vacca; blue perch, Taeniotoca lateralis, and yellow shiner, Cymatogaster aggregatus. Stomach, intestines, and excreta were examined for the presence of diatoms. Almost all the common diatoms were found to be used as food by the copepods. The copepods and herring were found to be important links in the food chains between diatoms and the larger fishes.

Artificial Transmission to and Susceptibility of Puget Sound Fish to Viral Erythrocytic Necrosis (VEN)

1979 ◽  
Vol 36 (9) ◽  
pp. 1097-1101 ◽  
Author(s):  
John R. MacMillan ◽  
Dan Mulcahy
Keyword(s):  
Disease Transmission ◽  
Intraperitoneal Injection ◽  
Brook Trout ◽  
Chum Salmon ◽  
Puget Sound ◽  
Clupea Harengus ◽  
Oncorhynchus Keta ◽  
Pacific Herring ◽  
Fish Disease ◽  
Clupea Harengus Pallasi

In Puget Sound, Wash., the incidence of viral erythrocytic necrosis (VEN) varied geographically from 0 to 17% in chum salmon (Oncorhynchus keta) and from 4 to 59% in Pacific herring (Clupea harengus pallasi). The disease was experimentally transmitted by intraperitoneal injection to chum, pink (O. gorbuscha), coho (O. kisutch), chinook (O. tshawytscha), sockeye (O. nerka), and Atlantic (Salmo salar) salmon, and rainbow (S. gairdneri), brown (S. trutta), and brook (Salvelinus fontinalis) trout. The disease was transmitted to chum salmon and brook trout by waterborne virus. Virus obtained from herring was experimentally transmitted into chum salmon by intraperitoneal injection. Key words: viral erythrocytic necrosis, fish disease, transmission

Fibrinolytic Activity of the Arterial Wall

1969 ◽  
Vol 21 (01) ◽  
pp. 001-011 ◽  
Author(s):  
K Onoyama ◽  
K Tanaka
Keyword(s):  
Carotid Artery ◽  
Fibrinolytic Activity ◽  
Arterial Wall ◽  
Aortic Wall ◽  
Internal Carotid ◽  
Atheromatous Plaque ◽  
Human Fibrinogen ◽  
The Media ◽  
The Common ◽  
Almost All

SummaryThe tissue fibrinolysis was studied in 550 specimens of 7 kinds of arteries from 80 fresh cadavers, using Astrup’s biochemical method and Todd’s histochemical method with human fibrinogen.In the microscopically normal aortic wall, almost all specimens had the fibrinolytic activity which was the strongest in the adventitia and the weakest in the media.The fibrinolytic activity seemed to be localized in the endothelium.The stronger activity lay in the adventitia of the aorta and the pulmonary artery and all layers of the cerebral artery.The activity of the intima and media of the macroscopically normal areas seemed to be stronger in the internal carotid artery than in the common carotid artery.Mean fibrinolytic activity of the macroscopically normal areas seemed to decrease with age in the intima and the media of the thoracic aorta and seemed to be low in the cases with a high atherosclerotic index.The fibrinolytic activities of all three layers of the fibrous thickened aorta seemed to decrease, and those of the media and the adventitia of the atheromatous plaque to increase.The fibrinolytic activity of the arterial wall might play some role in the progress of atherosclerosis.

scholarly journals Some 'Philosophicall Scribbles' attributed to Robert Hooke

1980 ◽  
Vol 35 (1) ◽  
pp. 17-32 ◽  
Keyword(s):  
Common Sense ◽  
Trinity College ◽  
Robert Hooke ◽  
Separate Sheet ◽  
The World ◽  
The Common ◽  
Almost All

Among the Hooke manuscripts held in the Library of Trinity College, Cambridge, is an undated document of four pages, entitled (on a separate sheet): XVI Philosophicall Scribbles’. We shall offer here an edition of this hitherto unpublished document; its contents will be discussed and compared with Hooke’s published theories of the soul, mind action and memory in his ‘Lectures of light’ (I); and some consideration will be given to the general adequacy of Hooke’s epistemology, as revealed in the ‘Scribbles’ and the ‘Lectures of light’, and its place in history. A transcription of the ‘Philosophicall scribbles’ reads as follows: It has pleased y e al wise contriuer of y e Universe to send man into the world almost/ready tempered,/like a peice of soft wax to receiue those impressions and stamps, which he has though[t] it most conuenient to receiue, though altogether unfit for/some/other perhaps, which his infinite wisdom saw good to w th hold. Those stamps are only of five kinds. And are generally comprisd under one name, to wit The Objects of Sense, /and this ? is calld the common sense,/But this is only that passiue facully [ sic ] w ch this lump or mass of bodys come furnished w th all, w ch is much y e same w th what y e bodys of almost all animalls are as well if not in a better manner endowed.

Epicuticular waxes of the genus Hordeum: a survey of their chemical composition and ultrastructure

1989 ◽  
Vol 67 (11) ◽  
pp. 3219-3226 ◽  
Author(s):  
Bernard R. Baum ◽  
A. Pat Tulloch ◽  
L. Grant Bailey
Keyword(s):  
Chemical Composition ◽  
Discriminant Analysis ◽  
Alcohol Content ◽  
Total Absence ◽  
Average Alcohol ◽  
The Common ◽  
Group 2 ◽  
Whole Plants ◽  
Almost All ◽  
Group 1

This study was based on 148 accessions representing 39 species of Hordeum. SEM ultrastructural morphology of waxes was based on individual spikelets, whereas waxes' chemical composition was assessed from whole plants. When all the data, in the form of individual accessions, were subjected to various cluster analyses methods, no groupings were revealed. But when the data were first summarized by species and then subjected to clustering, two polythetic groups of species were detected. Group 1 is characterized by species with 40–60% average alcohol content and by the common presence of diketones, whereas group 2 is characterized by species with 61 – 80% average alcohol content, by the total absence of hydroxy-β-diketone, and almost all species without β-diketone. The chemical data were then subjected to classificatory discriminant analysis to assess if a single previously unclassified accession could be identified into one of the two groupings. The nature of the differences between the two groupings was described by means of a canonical discriminant analysis. Mostly only plates and filaments were detected, and in many accessions the filaments were widened, appeared platelike, and were characteristic for one group. Presence of β-diketone varied within species. Hordeum violaceum was found to be unique in chemical composition.

Känslans platser. Topikerna för pathos i Aristoteles Retoriken

2018 ◽  
Vol 22 (78) ◽  
pp. 63-74
Author(s):  
Janne Lindqvist
Keyword(s):  
Significant Part ◽  
Starting Point ◽  
The Common ◽  
Almost All

Our understanding of Aristotle’s Rhetoric is still incomplete and distorted. This is especially true concerning his analysis of the specific topics of pathos that make up a significant part of the second book of the text. Even though this part of the text is almost twice as long as the analysis of the common topics, the discussion has attracted surprisingly small scholarly interest, at least as viewed as an example of a list of topics, as the researchers that have aspired to an understanding of “the topics” as such have almost all ignored this part of the text. The purpose of this essay is to lay out the grounds for such a study. The result of the essay is firstly a distinction between two kinds of specific topics, here somewhat ponderously labeled schematic and concrete specific topics. With these as a starting point it is possible to make a further distinction between three general specific topics here named subject, stimulus and agent. These three schematic topics could, it is finally suggested, be as useful in the 21:st century as they were in an Athens of the 4th century BCE

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