نتایج جستجو برای: canal lubricants

تعداد نتایج: 35567  

Journal: :Environmental science & technology 2008
Andres F Clarens Julie B Zimmerman Greg A Keoleian Kim F Hayes Steven J Skerlos

A number of environmentally adapted lubricants have been proposed in response to the environmental and health impacts of metalworking fluids (MWFs). The alternatives typically substitute petroleum with vegetable-based components and/or deliver minimum quantities of lubricant in gas rather than water, with the former strategy being more prevalent than the latter. A comparative life cycle assessm...

Journal: :The Journal of general and applied microbiology 2012
Jirapat Chanthamalee Ekawan Luepromchai

Boat lubricants are continuously released into the marine environment and thereby cause chronic oil pollution. This study aims to isolate lubricant-degrading microorganisms from Thai coastal areas as well as to apply a selected strain for removal of boat lubricants. Ten microorganisms in the genera of Gordonia, Microbacterium, Acinetobacter, Pseudomonas, Brucella, Enterococcus and Candida were ...

Journal: :The Journal of family practice 2012
Nicole VandenBerg Shailendra Prasad

Until now, we’ve only evaluated gel’s impact on test results Studies comparing lubricating gel and water have conclusively shown that a small amount of gel, used on the outside of the speculum blades, does not interfere with either Pap testing or detection of Chlamydia trachomatis. One liquid-based cytology manufacturer, however, discourages the use of lubricants with “carbomers” or “carbopol p...

Journal: :Nature 1920

Journal: :Drug delivery 2007
D Desai H Zia A Quadir

The primary objective of this study was to compare the lubrication properties of micronized poloxamer 188 (Lmicrotrol micro 68) and micronized poloxamer 407 (Lmicrotrol micro 127) with certain conventional lubricants such as magnesium stearate and stearic acid. The secondary objective was to use these micronized poloxamers as water-soluble tablet lubricants in preparation of effervecsent tablet...

Journal: :The Annals of otology, rhinology, and laryngology 1997
L H Mens T F Oostendorp G C Hombergen P den Broek

Hyaluronic acid (Healon), oxycellulose (hydroxypropyl methylcellulose), and glycerin are lubricants used in cochlear implant surgery for atraumatic deep insertion of the electrode array into the scala tympani. The electrical impedances of these three lubricants were measured to assess possible effects on intraoperative evoked response measurements, such as the electrically evoked stapedius refl...

2013
S. M. Alves E. Moura

This work studied the development of vegetable based lubricants and the addition of oxides nanoparticles (ZnO and CuO) as additive for extreme pressure (EP), exploring the EP and oil base influence in tribological behavior. The results showed that with the addition of nanoparticles to conventional lubricant, the tribological properties can be significantly improved. A smoother and more compact ...

Journal: :BMJ 2016

Dry eye disease (also called keratoconjunctivitis sicca) is a common condition, with a prevalence ranging from 8 to 34%, depending on the criteria used. It becomes more common with increasing age and affects more women than men. Artificial tears and ocular lubricants are considered the mainstay of treatment, and there is a very wide range of these products available. In England in 2014, over 6....

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2010
W Li X H Kong M Ruan F M Ma Y F Jiang M Z Liu Y Chen X H Zuo

General characteristics of waxes, adhesives and lubricants as well as the recent fundamental investigations on their physical and mechanical behaviour are introduced. The current R&D status for new type/generation of waxes, adhesives and lubricants from natural products is reviewed, with an emphasis on their tribological applications. In particular, some crucial issues and challenges relating t...

2015
Liwen Mu Yijun Shi Xiaojing Guo Tuo Ji Long Chen Ruixia Yuan Logan Brisbin Huaiyuan Wang Jiahua Zhu

A series of novel green lubricants with dissolved lignin in [choline][amino acid] ([CH][AA]) ionic liquids (ILs) have been synthesized in this work. The effect of lignin on the thermal and tribological properties of the lignin/[CH][AA] lubricants was systematically investigated by means of thermogravimetric analysis, differential scanning calorimetry, and a friction and wear tester. The lignin ...

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