Substance

2019 ◽  
pp. 30-52
Author(s):  
Martin Lin
Keyword(s):  
Substance P ◽  
Historical Context ◽  
Vicious Regress

One of Spinoza’s most surprising claims about substance is that it pertains to the nature of a substance to exist. What does this mean and why does Spinoza’ believe it? This chapter begins by situating Spinoza’s concept of substance in historical context by explaining the Aristotelian and Cartesian concepts of substance. Next, Spinoza’s argument for the claim that it pertains to the nature of a substance to exist is reconstructed and discussed step by step. Particular attention is paid to the connection that Spinoza sees between causation and similarity: one thing causes another only if they are similar to each other (that is, they share an attribute). Other issues considered in detail include Spinoza’s claim that no two substances can share an attribute and whether a world devoid of substance would involve a vicious regress with respect to being.

Mast cell-nerve fiber interaction: Ultrastructural studies

1990 ◽  
Vol 48 (3) ◽  
pp. 428-429
Author(s):  
E.Y. Chi ◽  
M.L. Su ◽  
Y.T. Tien ◽  
W.R. Henderson
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Substance P ◽  
Nerve Fiber ◽  
Sensory Nerves ◽  
Ultrastructural Studies ◽  
Morphological Studies ◽  
Granulocyte Infiltration ◽  
Intracutaneous Injection ◽  
Recent Attention

Recent attention has been directed to the interaction of the nerve and immune systems. The neuropeptide substance P, a tachykinnin which is a neurotransmitter in the central and peripheral nervous systems produces tissue swelling, augemntation of intersitial fibrin deposition and leukocyte infiltration after intracutaneous injection. There is a direct correlation reported between the extent of mast cell degranulation at the sites of injection and the tissue swelling or granulocyte infiltration. It has previously been demonstrated that antidromic electrical stimulation of sensory nerves induces degranulation of cutaneous mast cells, cutaneous vasodilation and augmented vascular permeability. Morphological studies have documented a close anatiomical association between mast cells and nonmyelinated nerves, that contain substance P and other neuropeptides. However, the presence of mast cells within nerve fasicles has not been previously examined ultrastructurally. In this study, we examined ultrastructurally the distribution of mast cells in the nerve fiber bundles located in the muscular connective tissue of rat tongues (n=20).

Elevated levels of substance P in tears of patients with allergic conjunctivitis and vernal keratoconjunctivitis

1997 ◽  
Vol 27 (4) ◽  
pp. 372-378 ◽  
Author(s):  
H. FUJISHIMA ◽  
M. TAKEYAMA ◽  
T. TAKEUCHI ◽  
I. SAITO ◽  
K. TSUBOTA
Keyword(s):  
Substance P ◽  
Allergic Conjunctivitis ◽  
Vernal Keratoconjunctivitis

Psychology as a Profession and a Science

2011 ◽  
Vol 16 (2) ◽  
pp. 111-117 ◽  
Author(s):  
Ype H. Poortinga ◽  
Ingrid Lunt
Keyword(s):  
European Association ◽  
Historical Context ◽  
Professional Psychologists

The European Association of Psychologists’ Associations (EFPA) was created in 1981 as the European Association of Professional Psychologists’ Associations (EFPPA). We show that Shakespeare’s dictum “What’s in a name?” does not apply here and that the loss of the “first P” (the adjectival “professional”) was resisted for almost two decades and experienced by many as a serious loss. We recount some of the deliberations preceding the change and place these in a broader historical context by drawing parallels with similar developments elsewhere. Much of the argument will refer to an underlying controversy between psychology as a science and the practice of psychology, a controversy that is stronger than in most other sciences, but nevertheless needs to be resolved.

Historical Context for Psychology, Moral Context for Historians

1997 ◽  
Vol 42 (11) ◽  
pp. 990-991
Author(s):  
Isaac Prilleltensky
Keyword(s):  
Historical Context ◽  
Moral Context
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