Results 211 to 220 of about 1,761,173 (265)

Chemical Control of Moulting in Arthropods

Nature, 1968
INSECTS are the only group of arthropods in which the control of moulting is well understood. A group of steroids—the ecdysones, thought to be produced by the prothoracic or ecdysial glands—cause moulting in almost all insect groups in which they have been tested1.
A, Krishnakumaran, H A, Schneiderman
openaire   +2 more sources

Controlling Chemical Reactivity with Antibodies

Science, 1993
The remarkable specificity of an antibody molecule has been used to accomplish highly selective functional group transformations not attainable by current chemical methods. An antibody raised against an amine-oxide hapten catalyzes the reduction of a diketone to a hydroxyketone with greater than 75:1 regioselectivity for one of two nearly equivalent ...
Hsieh-Wilson, Linda C., Yonkovich, Shirlee, Kochersperger, Lynn, Schultz, Peter G.   +3 more
openaire   +3 more sources

CONTROL IN A CHEMICAL ENGINEERING COURSE

IFAC Proceedings Volumes, 1988
Abstract The requirements of a course in control for Chemical Engineers are discussed and the place of traditional control theory in such a course questioned. A syllabus for a short course is presented which should provide a basic level of understanding for the non specialist. The lecture, tutorial and practical content is chosen to maintain interest
C. McDermott, A. Johnson
openaire   +1 more source

Chemical Control System of Epigenetics

The Chemical Record, 2018
Abstract Epigenetics represents the inheritable changes to the chemical control system governing the gene expression with no ensuing changes to the underlying DNA sequence. Environment‐mediated modification of the natural epigenetic interactions can perturb the cellular homeostasis and drive cells to a diseased state by switching ...
Thangavel, Vaijayanthi, Ganesh N, Pandian, Hiroshi, Sugiyama   +2 more
openaire   +2 more sources

The Chemical Control of Preoperative Anxiety

Psychophysiology, 1975
ABSTRACTThe effect of a psychoactive chemical. diazepam, on reducing physiologically disruptive anxiety in young female patients about to undergo operation was investigated. In a double‐blind study preoperative anxiety was measured by the Skin Conductance Anxiety Test (SCAT) after patients had been given either intravenous diazepam or placebo.
J G, Williams, J R, Jones, B, Williams
openaire   +2 more sources

HARMONIZING CONTROLS FOR CHEMICALS AND RADIONUCLIDES

Health Physics, 2001
Risk harmonization means more than harmonizing the way that the risk from ionizing radiation is managed by regulatory agencies. It also means bringing a common language and approach to the management of all environmental carcinogens. If this goal is accomplished, it can result in better communication between radiation and chemical risk managers and a ...
openaire   +2 more sources

Chemical control of feeding behavior

Comparative Biochemistry and Physiology Part A: Physiology, 1971
Abstract 1. 1. Chemical control of some aspects of feeding behavior is of widespread occurrence. 2. 2. A new classification of chemical effectors of feeding behavior is proposed. 3. 3. Specific chemical effectors of feeding behavior in many species are discussed. 4. 4.
openaire   +2 more sources

Biomimetic Control of Chemical Selectivity

Accounts of Chemical Research, 1980
Enzyme mimics and artificial enzymes have been designed to imitate several different aspects of enzyme catalysis. For instance, mimics have been constructed to imitate an enzymatic mechanism, using the same catalytic groups which the enzyme uses and examining the question of whether a proposed mechanism for the enzymatic process is reasonable or ...
openaire   +1 more source

Chemical Control of Starfish

Science, 1938
V L, Loosanoff, J B, Engle
openaire   +2 more sources

Analytical Chemical Control of Phthalates in Toys:Analytical Chemical Control of Chemical Substances and Products

2002
The content of phthalates in toys and other articles for children up to 3 years of age is regulated by the Statutory Order of Danish Ministry of Environment and Energy, No. 151 of 15th March 1999. In the present investigation, 35 products (toys and other articles for children up to 3 years of age) were analysed for the content of phthalates on the ...
Rastogi, S. C., Jensen, G. H., Worsøe, I. M.   +2 more
openaire   +1 more source