Browsing Life and Environmental Sciences by Issue Date
Now showing items 1-20 of 646
-
Anomalies In Blood Groups
(1933-04-01)Before being able to sot forth the atypical reactions and conditions which have been noted in the human blood groups, it will be necessary to show briefly the manner in which human blood is classified and the typical ... -
The Theories Of The Inheritance Of The Iso-Agglutinogens In The Blood
(1933-04-01)There has been of late a great deal of interest in and investigation of blood grouping from a genetic standpoint. It is the purpose of this paper to give and discuss the present status of the theories regarding the ... -
The Bacteriophage: Its Phenomenon, Nature, And Behavior
(1934-04-01)In introducing the phenomenon of the bacteriophage, we shall first consider the circumstances which offered a veiled suggestion that such a phenomenon existed. The first instance in which this action was observed was in ... -
Biological Backgrounds Of Sterilization
(1934-04-01)The question, or rather, the problem of sterilization of the unfit has been very forcibly carried into the minds of the people in the past few years. With 400,000 Germans eligible for sterilization under the law, the ... -
The Action Of Antiseptics And Disinfectants On Pathogenic Organisms Under Various Conditions And In Different Strengths
(1937-04-01)Since the beginning of history it has been known that the use of certain agents applied to wounds aided in their healing. Spices and arsenicals, which we now know to have antiseptic properties, were applied in diseases of ... -
A Survey Of Contemporary Knowledge Of Blood Grouping And Its Importance In Blood Transfusion
(1938-04-01)Blood grouping has emerged from an obscure position to one of foremost importance to medical science. At the same time it has become of practical usefulness in ethnological study, in the determination of parentage, and ... -
Effect Of Minor Respiratory Infections On The Blood Count
(1940-04-01)Common colds, as so often stated, are one disease which doctors know they know little about, but the average layman thinks he knows all about. Although colds outnumber any other disease 25 to 1, no one has ever died from ... -
A Study Of The Quantitative Determination Of Escherichia Coli As An Index Of Stream Pollution
(1940-04-01)In 1885 Escherichia coli (Bacterium coli) was isolated from the feces of a cholera patient by Escherich. Subsequently it was found to be the normal inhabitant of the intestinal tract of humans and of many animals. Because ... -
The Osteological Preparation, Disarticulation, And Mounting Of A Typical Mammal, Felis Domestica
(1944-04-01)A grey Persian cat with a crippled left hind foot was obtained for use in this preparation. The cat was killed by placing it in an air tight box with a piece of cotton saturated with chloroform. The tight wood box used was ... -
An Investigation Of The Bacteriological Flora Of The Lower Intestine Of The White Mouse
(1944-04-01)The lower region of the mammalian intestinal tract presents almost ideal conditions for the growth of a diversity of microorganisms. Indeed, investigations carried on by various research workers on experimental animals ... -
The Osteological Preparation And Construction Of A Mammalian Demonstration Model
(1944-04-01)A likely specimen, one of comparatively large size and complete development, was first obtained. Size, age, and development are important for the assurance of hardened bones and well developed teeth which are essential for ... -
An Investigation Into The Inhibitory Powers Of Saliva Against Bacterial Growth
(1947-04-01)From the beginning of modern medical knowledge, medical specialists in the area of the mouth have noticed that the tissues of the mouth were highly resistant to infection. And, with the advent of more thorough bacterial ... -
A Study Of Anaphylaxis And Its Laboratory Production In The Guinea Pig
(1947-04-01)In 1902 Richet and Fortier observed that dogs, which had recovered from the toxic effects of a sublethal dose of actinocongestin, a substance present in the tenacles of Actinaria, succumbed to a second infection of the ... -
The Anatomy Of The Cat Photographically Illustrated
(1948-04-01)The common practice of most anatomy and physiology books is to present sketches and diagrams of the organs and systems of the body. It is my aim to present a similar set of illustrations as they are actually seen through ... -
Preparing And Embedding Chicken-Embryos In Bio-Plastic
(1949-04-01)Manyfold have been the experiments and the methods, of the various interested experimenters, for embedding biological specimens, embryos and fetuses as well as adults, In plastic. Regarding the practicality of this technique ... -
The Construction Of A Shatter-Proof Anatomical Mount
(1949-04-01)The use of models in the study of all biological sciences has proved most helpful, especially in Embryology. Without models, a student of Embryology cannot easily visualize the third dimension of a subject as small as an ... -
The Natural Filtration Effects Of Fine Soil Upon Some Intestinal Bacteria Introduced From External Environmental Influences
(1949-04-01)Recently, the natural filtration effects of the soil upon some intestinal bacteria have not been studied from the viewpoint of determining their number and kind present as a result of external environmental influence. In ... -
Techniques Used In Imbedding Of Embryonic Specimens In A Plastic Monomer
(1950-04-01)The educational value of Bio-plastic has become more and more apparent in the last few years as the method used to imbed biological specimens have improved and the plastic used in imbedding became cheaper and easier to ... -
The Technique Of Embedding Embryos In Bio-Plastic
(1950-04-01)Not until the last few years have the advantages of plastic embedding become available to the student in the preparation of biological specimens. Through the advancements made by the Ward Natural Science Establishment, ... -
The Bacteriostatic Properties Of Garlic Juice Upon Staphylococcus Albus And Streptococcus Hemolyticus
(1950-04-01)In considering the bacteriostatic properties of garlic juice, the investigation of antibiotic substances should be viewed. Such substances have been known for many years, the first work being done on them was in 1860, ...