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Swelling of Valonia cellulose microfibrils in amine oxide systems (1).(Report)
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Abstract: Cellulose microfibrils from Valonia ventricosa cell-wall fragments were immersed into molten N-methylmorpholine-N-oxide monohydrate (NMMO*[H.sub.2]O), stabilized with n-propyl gallate and kept at 80 [degrees]C. The resulting ultrastructural modifications, which were followed by transmission electron microscopy and electron diffraction analysis, showed that within minutes the solvent slowly penetrated inside the crystalline microfibrils and progressed as a wedge in between the cellulose chains without cutting them. Prior to dissolution, a longitudinal subfibrillation ...
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Amethyst, Agate, and Calcite "Skunks" from Uruguay.
Magazine article from: Rocks & Minerals
; ...from India, I reasoned that adding amethyst to my inventory would not increase my...levels. If you want to buy a lot of amethyst, the obvious and intelligent thing to do is to go where the amethyst is found. Well, of course, everyone...
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Amethyst. (Jewel of the Month).(Brief Article)
Magazine article from: Jewelers Circular Keystone
; ...the holidays fast approaching its time to focus on amethyst Amethyst is purple quartz the majestic-colored siblings to...orange atrip-quartz. You probably sell most of your amethyst because it happens to be the birthstone for those...
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Amethyst.
Magazine article from: The Mineralogical Record
; ...and scientific. The current volume, Amethyst, is no exception. It is clear that...composed, graded layout in shades of amethyst, and the cloth cover itself is a rich...introduction, a section on the mineralogy of amethyst, and a description of amethyst occurrences...
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AMETHYST ADVOCATE PLANNING MEETINGS SET
News Wire article from: US Fed News Service, Including US State News
; ...news release: Western Illinois University Amethyst Advocates, someone who encourages safe drinking...those students interested in becoming an Amethyst Advocate - are invited to attend an Amethyst Advocate Planning Meeting tomorrow or March...
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The rebuilding of Amethyst House: healing from internal strife
Magazine article from: Herizons
; Acknowledgments Amethyst Women's Addiction Centre in Ottawa...feminist agency run for and by women. Amethyst offers a full range of day treatment...groups and programs for children of Amethyst clients. Amethyst's aim is to support...
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THE JACKSON'S CROSSROADS AMETHYST DEPOSIT WILKES COUNTY, GEORGIA
Magazine article from: Mineralogical Record
; ...recently produced some of the finest amethyst ever found in the United States. Rich...Wilkes County Jewels" world-class amethyst specimens. Mining continues at the site...long been known to produce finequality amethyst. In northwestern Wilkes County, about...
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The Jackson's Crossroads amethyst deposit: Wilkes County, Georgia.
Magazine article from: The Mineralogical Record
; ...recently produced some of the finest amethyst ever found in the United States. Rich...Wilkes County Jewels" world-class amethyst specimens. Mining continues at the site...been known to produce fine-quality amethyst. In northwestern Wilkes County, about...
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Amethyst industry seeking help to promote high-quality product. (Industry Overview)
Magazine article from: Northern Ontario Business
; The amethyst industry in Thunder Bay is slowly becoming...tags or stickers which would identify amethyst products as being made in Thunder Bay...consolidating existing research on the amethyst industry for more than a year. According...
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E-fulfilment -- 'Pay as you go', no-risk, from Amethyst Group; Focus on fulfilment as key to achieving customer connectivity goal.
M2 Presswire
; M2 PRESSWIRE-10 April 2003-Amethyst Group: E-fulfilment -- 'Pay as you go', no-risk, from Amethyst Group; Focus on fulfilment as key to...COMMUNICATIONS LTD RDATE:04102003 "For Amethyst, the key to success is to ensure that...
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Pink quartz: alias for amethyst.(GEM PROFILE)
Magazine article from: Modern Jeweler
; ...difference between boom and bust. Take pink amethyst. Thanks to a new alias, this gem may...small selection of what it called pink amethyst jewelry. Although very affordably priced...jewelry buyers. "When you think of amethyst, you think more of purple than pink...
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