Population studies of the citrus psylla,trioza erytreae: factors influencing dispersal

1991 ◽  
Vol 19 (4) ◽  
pp. 283-289 ◽  
Author(s):  
M. A. Van Den Berg ◽  
Susan H. Anderson ◽  
Valerie E. Deacon
Keyword(s):  
Population Studies ◽  
Factors Influencing ◽  
Trioza Erytreae ◽  
Citrus Psylla

Population studies of the citrus psylla,Trioza erytreae: Factors influencing population size

1991 ◽  
Vol 19 (3) ◽  
pp. 183-193 ◽  
Author(s):  
M. A. van den Berg ◽  
Susan H. Anderson ◽  
Valerie E. Deacon
Keyword(s):  
Population Size ◽  
Population Studies ◽  
Factors Influencing ◽  
Trioza Erytreae ◽  
Citrus Psylla

Interactions between citrus psylla,Trioza erytreae (Hem. Triozidae), and spiders in an unsprayed citrus orchard in the transvaal lowveld

Entomophaga ◽  
1992 ◽  
Vol 37 (4) ◽  
pp. 599-608 ◽  
Author(s):  
M. A. Berg ◽  
Ansie S. Dippenaar-Shoeman ◽  
Valerie E. Deacon ◽  
Susan H. Anderson
Keyword(s):  
Citrus Orchard ◽  
Trioza Erytreae ◽  
Citrus Psylla

A bibliography of the citrus psylla,Trioza Erytreae (Del Guercio) (Hemiptera: Triozidae), up to 1987

1988 ◽  
Vol 16 (1) ◽  
pp. 47-61 ◽  
Author(s):  
M. A. Van Den Berg ◽  
Cecelia D. Fletcher
Keyword(s):  
Trioza Erytreae ◽  
Citrus Psylla

Trioza erytreae. [Distribution map].

1967 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
Geographical Distribution ◽  
Host Plants ◽  
Distribution Map ◽  
Trioza Erytreae ◽  
St Helena ◽  
Citrus Psylla ◽  
New Distribution

Abstract A new distribution map is provided for Trioza erytreae (Del G.) (Homopt., Psyllidae) (Citrus Psylla). Host Plants: Citrus spp. Information is given on the geographical distribution in AFRICA, Cameroun, Congo (Kinshasa), Eritrea, Ethiopia, Kenya, Madagascar, Malawi, Mauritius, Rhodesia, Rwanda, St. Helena, Sudan, South Africa, Tanzania, Uganda, Zambia.

Factors influencing adhesive bonding at the bone/implant interface

1992 ◽  
Vol 50 (2) ◽  
pp. 1114-1115
Author(s):  
Julie A. Martini ◽  
Robert H. Doremus
Keyword(s):  
Electron Microscopy ◽  
Adhesive Bonding ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Bone Implant ◽  
Factors Influencing ◽  
Lr White ◽  
Transmission Electron ◽  
New Zealand White Rabbits ◽  
Scanning Electron

Tracy and Doremus have demonstrated chemical bonding between bone and hydroxylapatite with transmission electron microscopy. Now researchers ponder how to improve upon this bond in turn improving the life expectancy and biocompatibility of implantable orthopedic devices.This report focuses on a study of the- chemical influences on the interfacial integrity and strength. Pure hydroxylapatite (HAP), magnesium doped HAP, strontium doped HAP, bioglass and medical grade titanium cylinders were implanted into the tibial cortices of New Zealand white rabbits. After 12 weeks, the implants were retrieved for a scanning electron microscopy study coupled with energy dispersive spectroscopy.Following sacrifice and careful retrieval, the samples were dehydrated through a graduated series starting with 50% ethanol and continuing through 60, 70, 80, 90, 95, and 100% ethanol over a period of two days. The samples were embedded in LR White. Again a graduated series was used with solutions of 50, 75 and 100% LR White diluted in ethanol.

Factors Influencing Electrophysiologic Responsivity in Normal Adults

1965 ◽  
Vol 8 (4) ◽  
pp. 323-347
Author(s):  
Robert Goldstein ◽  
Benjamin RosenblÜt
Keyword(s):  
Conditioned Stimulus ◽  
White Light ◽  
Pure Tone ◽  
Alpha Rhythm ◽  
White Women ◽  
White Men ◽  
Inverse Relation ◽  
Factors Influencing ◽  
Electrodermal Responses ◽  
Normal Adults

Electrodermal and electroencephalic responsivity to sound and to light was studied in 96 normal-hearing adults in three separate sessions. The subjects were subdivided into equal groups of white men, white women, colored men, and colored women. A 1 000 cps pure tone was the conditioned stimulus in two sessions and white light was used in a third session. Heat was the unconditioned stimulus in all sessions. Previously, an inverse relation had been found in white men between the prominence of alpha rhythm in the EEG and the ease with which electrodermal responses could be elicited. This relation did not hold true for white women. The main purpose of the present study was to answer the following questions: (1) are the previous findings on white subjects applicable to colored subjects? (2) are subjects who are most (or least) responsive electrophysiologically on one day equally responsive (or unresponsive) on another day? and (3) are subjects who are most (or least) responsive to sound equally responsive (or unresponsive) to light? In general, each question was answered affirmatively. Other factors influencing responsivity were also studied.

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