Narrow-Cut Petroleum Fractions of Naphthenic and Paraffinic Composition for Control of Citrus Red Mite and Citrus Bud Mite1

1953 ◽  
Vol 46 (6) ◽  
pp. 1014-1020 ◽  
Author(s):  
L. A. Riehl ◽  
L. R. Jeppson
Keyword(s):  
Citrus Red Mite ◽  
Petroleum Fractions

Structure and composition of metal particles in Pt-Sn/Al2O3 bimetallic catalysts

1990 ◽  
Vol 48 (4) ◽  
pp. 278-279
Author(s):  
A. Sachdev ◽  
J. Schwank
Keyword(s):  
Bimetallic Catalysts ◽  
Bimetallic Catalyst ◽  
Size Structure ◽  
High Surface ◽  
High Surface Area ◽  
Metal Particles ◽  
Alloy Formation ◽  
Particle Size Range ◽  
Oxide Supports ◽  
Petroleum Fractions

Platinum - tin bimetallic catalysts have been primarily utilized in the chemical industry in the catalytic reforming of petroleum fractions. In this process the naphtha feedstock is converted to hydrocarbons with higher octane numbers and high anti-knock qualities. Most of these catalysts contain small metal particles or crystallites supported on high surface area insulating oxide supports. The determination of the structure and composition of these particles is crucial to the understanding of the catalytic behavior. In a bimetallic catalyst it is important to know how the two metals are distributed within the particle size range and in what way the addition of a second metal affects the size, structure and composition of the metal particles. An added complication in the Pt-Sn system is the possibility of alloy formation between the two elements for all atomic ratios.

Relationship between sensitization to citrus red mite (Panonychus citri ) and the prevalence of atopic diseases in adolescents living near citrus orchards

2002 ◽  
Vol 32 (7) ◽  
pp. 1054-1058 ◽  
Author(s):  
S. -H. Kim ◽  
Y. -K. Kim ◽  
M. -H. Lee ◽  
S. -C. Hong ◽  
J. -M. Bae ◽  
...  
Keyword(s):  
Atopic Diseases ◽  
Panonychus Citri ◽  
Citrus Red Mite ◽  
Citrus Orchards

Evaluation of boiling process on the basis of electrical resistance of petroleum fractions

1987 ◽  
Vol 23 (8) ◽  
pp. 393-395
Author(s):  
B. A. Zimin ◽  
I. I. Stolonogov ◽  
M. A. Gusev ◽  
A. N. Nesterov
Keyword(s):  
Electrical Resistance ◽  
Petroleum Fractions ◽  
Boiling Process

Preparation of coloured pigments for surface coating from petroleum fractions

1984 ◽  
Vol 13 (8) ◽  
pp. 4-17 ◽  
Author(s):  
Saad Amin Fam ◽  
Fawzia F. Abdel‐Mohsen
Keyword(s):  
Surface Coating ◽  
Petroleum Fractions

Isolation and study of polycyclic naphthenes from high-boiling petroleum fractions

1980 ◽  
Vol 20 (3) ◽  
pp. 155-161
Author(s):  
S SERGIYENKO ◽  
A POLYAKOVA ◽  
A AIDOGDYYEV ◽  
Y TALALAYEV ◽  
B NIYAZOV ◽  
...  
Keyword(s):  
Petroleum Fractions

Influence of Drilling Muds on the Primary Chemosensory Neurons in Walking Legs of the Lobster, Homarus americanus

1981 ◽  
Vol 38 (3) ◽  
pp. 268-274 ◽  
Author(s):  
Charles D. Derby ◽  
Jelle Atema
Keyword(s):  
Feeding Behavior ◽  
Homarus Americanus ◽  
Normal Activity ◽  
Drilling Mud ◽  
Behavioral Deficits ◽  
Chemosensory Neurons ◽  
Petroleum Fractions ◽  
Food Odors ◽  
Normal Feeding ◽  
Drilling Muds

The effects of whole drilling muds on the normal activity of walking leg chemosensory neurons of the lobster, Homarus americanus, were examined using extracellular neurophysiological recording techniques. Exposure of legs for 3–5 min to 10 mg/L drilling mud suspended in seawater altered responses to food odors of 29% of the chemoreceptors examined (data pooled for the two drilling muds tested); similar exposure to 100 mg/L drilling mud resulted in interference with 44% of all receptors studied. The effects of both of these concentrations are statistically significant, although they are not different from each other. Interference was usually manifested as a marked reduction in the number of action potentials in a response. In one preparation, the exposure to drilling mud caused a change in the temporal pattern of the spikes without affecting the total number of spikes. Other chemosensory neurons were excited by 10 mg/L drilling mud itself. However, not all chemoreceptors are inhibited by these drilling muds since responses to feeding stimuli were recorded from the legs of lobsters that had been exposed to drilling mud for 4–8 d before the neurophysiological experiments.Antennular and leg chemoreceptors are important in eliciting normal feeding behavior in lobsters. Although behavioral assays have demonstrated that feeding behavior is altered following exposure to drilling muds and petroleum fractions, there is no conclusive proof for a causal relationship between chemoreceptor interference and behavioral deficits. The two techniques complement each other as pollution detection assays, perhaps reflecting a common interference mechanism.Key words: chemoreception, drilling mud, feeding behavior, lobster, pollution, neurophysiology

Analysis of Light Petroleum Fractions

1937 ◽  
Vol 9 (1) ◽  
pp. 21-25 ◽  
Author(s):  
S. S. Kurtz ◽  
C. E. Headington
Keyword(s):  
Light Petroleum ◽  
Petroleum Fractions

Panonychus citri. [Distribution map].

1964 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
New Zealand ◽  
Central America ◽  
West Indies ◽  
Pacific Islands ◽  
Distribution Map ◽  
Panonychus Citri ◽  
Citrus Red Mite ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Panonychus citri (McG.) (Acarina, Tetranychidae) (Citrus Red Mite). Hosts: Citrus spp., deciduous fruits, ornamentals, etc. Information is given on the geographical distribution in EUROPE (excl. USSR), Yugoslavia, ASIA (excl. USSR), Ceylon, China, India, Iran, Japan, Lebanon, Turkey, Vietnam, USSR, AFRICA, Republic of South Africa, Tunisia, AUSTRALASIA, and PACIFIC ISLANDS, Australia, Hawaii, New Zealand, NORTH AMERICA, U.S.A., CENTRAL AMERICA and WEST INDIES, West Indies, SOUTH AMERICA, Argentina, Brazil, Chile, Colombia, Peru.

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