Effects of Medium Agitation and Wetting Agents on Oxidation of Sulphur by Thiobacillus thiooxidans

It is shown that there exists in the autotrophic bacterium Thiobacillus thiooxidans a measurable oxygen uptake in the absence of the specific nutrient (sulfur). This respiration is shown to be due to the utilization of organic materials which must have been previously synthesized by the chemosynthetic process, providing evidence that autotrophic bacteria contain a dissimilatory process which involves the breakdown of organic materials and furnishes energy for the maintenance of the cell during periods in which the specific nutrient is absent. This is entirely in accord with the work of Bömeke (1939), who provided similar types of proof for Nitrosomonas and Nitrobacter. One may conclude, therefore, that autotrophic bacteria possess an endogenous respiration which involves the utilization of previously synthesized organic materials.

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Some Experiments with Wetting Agents.

The Journal of Physical Chemistry ◽

10.1021/j150350a004 ◽

1933 ◽

Vol 37 (8) ◽

pp. 1001-1008 ◽

Cited By ~ 15

Author(s):

Harvey A. Neville ◽

Charles A. Jeanson

Keyword(s):

Wetting Agents

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Phytotoxicity of Wetting Agents on Lychee1

Journal of Economic Entomology ◽

10.1093/jee/54.6.1074 ◽

1961 ◽

Vol 54 (6) ◽

pp. 1074-1076 ◽

Cited By ~ 2

Author(s):

S. Nakata ◽

Y. Tanada

Keyword(s):

Wetting Agents

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Conductometric Assay of Inorganic Salt in Presence of Wetting Agents

Industrial & Engineering Chemistry Analytical Edition ◽

10.1021/i560102a023 ◽

1942 ◽

Vol 14 (2) ◽

pp. 151-153 ◽

Cited By ~ 2

Author(s):

J Percy ◽

C Arrowsmith

Keyword(s):

Inorganic Salt ◽

Wetting Agents

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Copolymerization of Acrylic Monomers and Silane Group Containing Titanium Carbide Nanoparticles for Application to Ophthalmic Lens Materials

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19432 ◽

2021 ◽

Vol 21 (8) ◽

pp. 4388-4393

Author(s):

Min-Jae Lee ◽

A-Young Sung

Keyword(s):

Ethylene Glycol ◽

Titanium Carbide ◽

Oxygen Permeability ◽

Synergy Effect ◽

Poly Ethylene Glycol ◽

Propyl Methacrylate ◽

Acrylic Monomers ◽

Wetting Agents ◽

Poly Ethylene ◽

Glycol Methyl Ether

This research was conducted to synthesis and application for high oxygen permeable ophthalmic lens materials. 2-(Trimethylsiloxy)ethyl methacrylate (2T), 3-[Tris(trimethylsiloxy)silyl]propyl methacrylate (3T), [(1,1-Dimethyl-2-propynyl)oxy]trimethylsilane (TMS), Poly(ethylene glycol) methyl ether methacrylate (PEGMA), N-vinyl-2-pyrrolidone (NVP) and titanium carbide nanoparticles were used as additives for the basic combination of synthesized silicone monomer (SiD) and N,N-Dimethylacetamide (DMA). And also, the materials were copolymerized with ethylene glycol dimethacrylate (EGDMA) as the cross-linking agent, azobisisobutyronitrile (AIBN) as the initiator. The copolymerization with a small amount of silane of about 1% increased the oxygen permeability to 30.3˜33.52(cm2/sec)·(mlO2/ml·mm Hg)·10−11, and in particular, the addition of titanium carbide nanoparticles was found to increase to 46.38 (cm2/sec)·(ml O2/ml·mm Hg)·10−11. Surface modification was possible with various wetting agents. Especially, simultaneous use with titanium carbide nanoparticles increased the wettability while maintaining water content. These materials are considered to make synergy effect each other, so it can be used in functional hydrogel ophthalmic lenses.

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Effect of postharvest dipping in insecticides on the vase life of Geraldton waxflower

Australian Journal of Experimental Agriculture ◽

10.1071/ea9960373 ◽

1996 ◽

Vol 36 (3) ◽

pp. 373 ◽

Cited By ~ 2

Author(s):

KA Seaton ◽

DC Joyce

Keyword(s):

Wetting Agent ◽

Vase Life ◽

Ambient Temperatures ◽

Application Rates ◽

Wetting Agents ◽

Chamelaucium Uncinatum

In postharvest dipping treatment of Geraldton waxflower (Chamelaucium uncinatum), 13 insecticides tested at recommended application rates caused no visual injury, but some reduced vase life. Flowers of cv. Purple Pride were more sensitive to insecticides than leaves. There was no loss of vase life of flowers following dipping in chlorpyrifos, dimethoate or permethrin. Following dipping in deltamethrin, carbaryl, dichlorvos, cypermethrin, endosulfan or fenvalerate there was 31-49% loss of vase life. No loss of vase life was observed for cv. Alba, after dipping in carbaryl, fenvalerate or dimethoate. Insecticide dips containing wetting agent and a fungicide (e.g. a combination of deltamenthrin, Aqua and benomyl) was a suitable dip for Geraldton waxflower. Wetting agents varied in their effect on vase life. Aqua shortened vase life less than Agral, and D-CTrate less than D-C-Tron. Stems rapidly lost weight when held out of water following dipping, and vase life was reduced when ambient temperatures were above 30�C or drying times exceeded 60 min. It was concluded that flowers should be kept cool and well hydrated following dipping treatment.

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