Unusual Twist Research Articles

Unusual twist on quest for new ideas

In a rare move to access novel technology, H.B. Fuller plans to host up to six start-up companies in unused space at its R&D facility in Vadnais Heights, Minn., just outside of St, Paul. Usually it's state and local economic development agencies, universities, or, in some cases, venture capitalists that start-up companies turn to when in need of such facilities. Corporate-sponsored incubators are not the norm, admits Fuller's Steve Zitnick, who heads the team supervising the incubator, to be known as EntreGrow. The purpose is to gain access to technology outside our traditional business. It has to be technology whose synergy we can leverage, he says, but not necessarily related to Fuller's core businesses such as adhesives and coatings. Incubator companies will have access not only to hard-to-find wet lab space, but also to analytical instruments, physical testing equipment, pilot production facilities, project engineering services, patent consultation,and marketing help, Zitnick explains. In retu rn fo...

Women in the Underground Business of Eighteenth-Century Lyon

Women's work has often been portrayed as unskilled and lowpaid labor done for the benefit of others. But the role of female enterprise in eighteenth-century Lyon presents another dimension: non-guild women workers who secured control of raw materials, labor,and distribution networks within an underground economy. In an unusual twist of fortune,a small but significant number of women in the silk,hat-making, and button-making industries turned to their own benefit the advantages customarily provided to male entrepreneurs. These women workers stole materials from the guild workshops in which they were employed. Having learned the technology needed to manufacture silk,hats,and buttons from guild masters,they set up clandestine workshops and trained their own workers. Even in the face of official guild protest,their low prices and competent workmanship induced some masters to buy their goods to reduce the cost of their own products. The women used a set of capitalist practices to survive in a difficult transitional era of superficially regulated norms.

Titanium imido complexes with 1,3,5-triazacyclohexane ligands: syntheses, solution dynamics and solid state structures

The multi-gram scale syntheses of the first 1,3,5-triazacyclohexane imido complexes [Ti(NR)(R3′tach)Cl2] (R=But, C6H3Pr2i-2,6; R′=Me, But) are described together with the X-ray structures of [Ti(NBut)(Me3tach)Cl2] and [Ti(NBut)(Bu3ttach)Cl2]; the complexes of Me3tach exhibit dynamic NMR behaviour ia an unusual trigonal twist of the facially coordinated Me3tach ligand (Me3tach and Bu3ttach=1,3,5-trimethyl- and tri-tert-butyl-1,3,5-triazacyclohexane, respectively).

Binary interactions between polar lows

In this study, the movement of polar lows is addressed from a novel and perspicuous viewpoint. The usual assumption has been that these mesoscale systems are, to a first approximation, advected by the larger scale flow in which they are embedded. However, when there are two or more polar lows in the same vicinity, binary interactions between pairs of polar lows can cause a cyclonic co-rotation of the pair. In geographic coordinates these interactions can appear as unusual loops, twists and turns in the low tracks, due to the interplay between the cyclonic co-rotation and the translation of the binary pair by the ambient flow. However when the tracks are replotted in centroid relative coordinates, a mutual rotation is unmistakable. Satellite imagery from several case studies has been examined to accurately determine the polar low tracks, and thus the co-rotations. Using surface wind observations, a theoretical rotation rate can be estimated, based on barotropic vortex dynamics. There is a good correspondence between the observed and calculated rotation rates. Recognizing the existence of binary interactions between polar lows emphasises the connection between polar lows and tropical cyclones, where binary interactions have been described in several studies. Indeed, in the cases studied here, binary interactions are strongest during the secondary (convective) stage of polar low development where the lows are somewhat analogous to arctic hurricanes.

Memories of Sexual Violence: An Interview with Jennifer Montgomery

Research Article| December 01 1996 Memories of Sexual Violence: An Interview with Jennifer Montgomery George Paul Csicsery, George Paul Csicsery Search for other works by this author on: This Site PubMed Google Scholar Jennifer Montgomery Jennifer Montgomery Search for other works by this author on: This Site PubMed Google Scholar Film Quarterly (1996) 50 (2): 2–10. https://doi.org/10.2307/1213418 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation George Paul Csicsery, Jennifer Montgomery; Memories of Sexual Violence: An Interview with Jennifer Montgomery. Film Quarterly 1 December 1996; 50 (2): 2–10. doi: https://doi.org/10.2307/1213418 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentFilm Quarterly Search This content is only available via PDF. Copyright 1997 The Regents of the University of California Article PDF first page preview Close Modal You do not currently have access to this content.

1-(R)-{2-[1-(R)-(N,N-Dimethylamino)ethyl]-1,1'-(S,S)-biferrocen-2'-yl}ethyl-N,N-dimethylammonium Trichloro(dimethyl sulfoxide-S)platinate(II)

The structure of title compound, C28H37Fe2N2+·C2H6Cl3OPtS−, reveals an unusual twisting of the ferrocenyl moieties in the monoprotonated bis-amine with respect to the inter­ferrocenyl C-C bond. This deformation can be ascribed to hydrogen bonding between the amine proton and the unprotonated amine residue. The absolute configuration at each of the chiral C atoms is shown to be R while the metallocene chiralities are S.

New $\frac{3}{4}$-Approximation Algorithms for the Maximum Satisfiability Problem

Yannakakis recently presented the first $\frac{3}{4}$-approximation algorithm for the Maximum Satisfiability Problem (MAX SAT). His algorithm makes nontrivial use of solutions to maximum flow problems. New, simple $\frac{3}{4}$-approximation algorithms that apply the probabilistic method/randomized rounding to the solution to a linear programming relaxation of MAX SAT are presented. It is shown that although standard randomized rounding does not give a good approximate result, the best solution of the two given by randomized rounding and a well-known algorithm of Johnson is always within $\frac{3}{4}$ of the optimal solution. It is further shown that an unusual twist on randomized rounding also yields 4-approximation algorithms. As a by-product of the analysis, a tight worst-case analysis of the relative duality gap of the linear programming relaxation is obtained.

A new clinical disorder of twisted and rolled body hairs with multiple, large knots

We present a new hair disorder characterized by an unusual twisting and matting of body hairs. This disorder may occur as an acquired or, possibly, an inherited trait. Our purpose was to analyze the clinical features of three patients and report the changes revealed by light microscopy and scanning electron microscopy. We examined two unrelated adults with acquired multiple large knots of body hairs and a newborn infant with a familial history of the same entity. In the two adults the hairs were rolled and knotted together, and twisting of body hairs occurred in areas where rubbing was frequent. In the familial type, which was suggestive of an autosomal dominant inheritance pattern, no mechanical explanation could be found. Light microscopy confirmed the clinical impression of twisted and felted hairs, and scanning electron microscopy revealed sticking of at least 20 hairs. No underlying skin disease or deeper process was found. Multiple twisted and rolled body hairs that may develop into multiple, large knots may appear as a minor variant of hair matting or felting. Scanning electron microscopy shows multiple hairs that originate from different hair follicles and roll and stick together centrally.

An unusual twist in the synthesis and hydrolysis of the 23,24-epoxide of 22,23-dihydroavermectin B 1a

Treatment of 4″,5-di-O-tert-butyldimethylsilyl(or phenoxyacetyl)-7-O-trimethylsilyl-avermectin B 2a ( 1a,b) with diethylaminosulfur trifluoride (DAST) at 20ÁC in dichloromethane resulted in net elimination of water to yield 65% of the 23,24-olefin ( 2a,b), 5–10% 23-fluoroavermectin derivative ( 3a,b), and 20–25% of two rearranged products ( 4a,b:5a,b in a 2:1 ratio). The trisubstituted 23,24-olefin ( 2a,b) was selectively epoxidized with m-chloroperbenzoic acid to give a mixture of alpha ( 6a,b major) and beta ( 7a,b minor) 23,24-epoxides in 64% yield. The acid catalyzed hydrolysis of epoxide 6a,b unexpectedly afforded hemiketal 9a,b as the major product (60%) and the usual 23,24-diol 10a,b as the minor product (6%). Subsequent Ley perruthenate oxidation of 9b produced lactone 13b in 15% yield. Lead tetracetate oxidation of 10a produced the desired cleavage product 14a in 40–50% yield.

Fictive Foundations: National Romances and Subaltern Ethnicity in Latin America

Miguel Taimal, former governor and local historian of the indigenous community of Cumbal, Colombia, once shared with me his version of Columbus' arrival in America.' Columbus ventured across the ocean in search of territory, he told me, because Spain was suffering a land shortage. After six months of sailing, the land-starved sailors threatened mutiny. Suddenly, they saw a light shining: their ship had reached land. Columbus' crew first set foot on American soil with Law 89 of 1890 in hand; that is, they arrived carrying copies of the post-Independence law that specifies the nature of indigenous landholdings in Colombia.2 Hardly a version of the Spanish invasion as we would tell it, don Miguel's tale compresses time and space, inserting such known quantities as turn-of-the-century Indian law and Colombian national territory into a story that should have taken place several centuries before, in the distant Caribbean. The storyteller thus reintroduces indigenous people into national history, seeking the roots of nationality in the colonial period, instead of the nineteenth century. Don Miguel's account is reminiscent of the history told by many of his Cumbal neighbors.3 Like them, he conflates recent legislation and the colonial-era documentation that legitimizes indigenous communal landholdings and provides evidence for indigenous historians. But in an unusual twist, his Spaniards are ambiguous characters who, like today's Indians, are starved for land; his Columbus has the unlikely honour of granting Colombian Indians protectionist legislation. The narratives of don Miguel and others like him provide subject matter for local historical writing. One example is a mimeographed magazine, the Chasqui Cumbe or Cumbe Post that was written in 1986 by two young political activists, Efr&n Tarapues and HelI Valenzuela.4 The first (and only) issue of the magazine was historical in focus, calling for the elucidation of data hidden in archives:

At Law: In Re Helga Wanglie

In this issue, At Law returns as a regular feature of Report under authorship of Alexander Morgan Capron, Henry W. Bruce Professor of Law and Medicine at University of Southern California. A distinguished legal scholar, Prof. Capron served as executive director of President's Commission for StudY of Ethical Problems in Medicine and Biomedical and Behavioral Research and has written extensively on issues in bioethics. Helga Wanglie was an active, well-educated woman of eighty-five when on 14 December 1989 she tripped over a rug and broke her hip. With that injury she began successive treatments at a series of acute care, rehabilitation, and nursing facilities, during which she had several cardiopulmonary arrests. For more than a year-from 23 May 1990, when she suffered severe anoxia, until 4 July 1991, when she died-Mrs. Wanglie lay unconscious in a persistent vegetative state (PVS), her breathing sustained by a respirator and her nutrition supplied through a tube. This sort of extended dying has regrettably become an all-too-familiar tale in our courtrooms. Many judges have been called upon to approve decisions of seriously ill patients' next of kin to withdraw life-sustaining procedures. Helga Wanglie's dying also became a court case, but with an unusual twist: when Mrs. Wanglie's husband of fifty-three years refused to consent to withdrawal of her treatment, a Minnesota district court judge was asked to name another guardian in his place. The petition to replace guardian was filed by Steven B. Miles, a gerontologist who served as an ethical consultant to Mrs. Wanglie's physicians at Hennepin County Medical Center (HCMC). On 1 july, judge Patricia L. Belois ruled that Miles has offered no evidence that Oliver Wanglie is incompetent to discharge trust as Conservator of Person of his wife. Belois therefore denied Dr. Miles's petition and granted petition filed by Mr. Wanglie, who judge found was the most suitable and best qualified among available guardians. The narrow, fact-based nature of Judge Belois's decision, coupled with Mrs. Wanglie's death three days later, might seem to render case of interest only to those directly involved. Yet dramatic statement by physicians, when they first announced their intention to go to court, that they did not want to give medical care they describe as futile,(1) secured dispute a lasting niche in bioethics lore as case that made medical futility front-page news. Since issues implicated will survive longer than Helga Wanglie did after court ruled in her husband's favor, it is important to be clear about what really was-and wasn't-involved. The case turns out to be a murky glass for viewing issue of futility. What Did She Want? Before futility emerged as a full-blown issue at Helga Wanglie's bedside, another issue was in dispute: what views had she held about life-prolonging treatment under circumstances? Physicians at HCMC have asserted that prior to December 1990, when they pressed Mr. Wanglie to allow treatment to be withdrawn, he told hospital staff that his wife had not discussed these issues, and that her wishes were a 'black box.(2) The implication is clear. Oliver Wanglie knowingly or unknowingly prevaricated; continuing life-support was merely his wish, not a view his wife ever voiced.(3) The astonishing aspect of this case-especially insinuation from HCMC physicians that their uncertainty about Helga Wanglie's wishes was her husband's fault-is that she was still competent while being treated at HCMC for first four months of 1990. If attending physicians at a leading hospital like HCMG-with a long-standing ethics committee and several nationally known ethicists on staff-fail to engage patients like Mrs. Wanglie in discussions about their treatment wishes, then one clear implication of case is that Patient SelfDetermination Act may indeed be beneficial. …

Synthesis, crystal, and molecular structures and conformations of naphthot[1,8- [formula omitted], [formula omitted]]-1,5-dithiocin-1,1-dioxide,-1,5-dioxide,-1,1,5-trioxide and -1.1,5,5-Tetraoxide

Chemoselective oxidation of the known naphtho[1,8,- b, c-1,5-dithiocin, dithioether 1, to the corresponding -1,1-dioxide: monosulfone 3, 1,5-dioxide: cis-disulfoxide 4, or -1,1,5,5-tetraoxide: disulfone 6 can be accomplished with potassium permanganate and a phase transfer catalyst in a two phase system in 66% yield, with sodium metaperiodate in aqueous methanol in 95% yield, or ruthenium tetraoxide in 70% yield, respectively. Oxidation of the known monosulfoxide 2 with potassium permanganate and a phase transfer catalyst in a two phase system also gave monosulfone 3 in 73% yield. The corresponding -1,1,5-trioxide: sulfoxide-sulfone 5 was selectively prepared in quantitative yield by oxidation of the monosulfone 3 with sodium metaperiodate in aqueous methanol. The crystal and molecular structures, and conformations of naphtho[1,8- b, c]-1,5-dithiocin-1,1-dioxide ( 3), -1,5-dioxide ( 4), -1,1,5-trioxide ( 5), and -1,1,5,5-tetraoxide ( 6) were determined by single crystal X-ray analysis. These compounds crystallize in the monoclinic space group P2 1/c with a=13.184(4)Å, b=13.182(5)Å, c=7.106(l)Å, β=104.14(5)°, and Z=4, the orthorhombic space group P bca, with a=17.931(2)Å, b=13.108(3)Å, c=20.280(4)Å, and Z=16, the monoclinic space group P2 1/n with a=9.298(1)Å, b=10.264 (2)Å, c=13.396(2)Å, β=110.06(1)°, and Z=4, and the orthorhombic space group P bca with a=12.258(3)Å, b=9.997Å, C=20.168Å, and 2-8, respectively. The structures were solved by direct methods. Full-matrix least-squares refinement led to conventional R factors of 0.034, 0.046, 0.041, and 0.049, respectively. The conformations of the molecules in the solid state were distorted boat, boat with cis-dlequatorial sulfoxide; boat with equatorial sulfoxide, and the unusual twist conformer, respectively.

Dihydrazidophosphoric Acid Derivatives as Starting Materials for Inorganic Heterocycles with Unusual Ring Conformations

Abstract Reported are synthetic routes to inorganic heterocycles of different ring size, containing phosphorus, hydrazine, silicon and other elements as ring components. Steric effects that cause saturated sixmembered rings to adopt an unusual twist conformation are discussed (temperature dependent NMR-spectra, X-ray structures).

An unusual twist to umbilical artery catheterization.

An unusual twist to umbilical artery catheterization.

Stereochemistry of rings. V . γ-lactone derivatives : Part 3. The X-ray crystal structure of 3,3-diphenyl-2-butyrolactone

Crystals of the title compound are monoclinic with a = 7.599(2), b = 15.558(3), c = 13.591(3) Å, β = 126.93(0.09)°, Z = 4 and space group C c. The structure was solved by direct methods and refined by least-squares full cycles to a final R of 0.082 for 1193 independent reflections. The lactone ring is not planar but has an unusual twist conformation. A significant difference in length between the two formally single C-O bonds is observed.

Ruptured Baker's Cyst Simulating Thrombophlebitis

To the Editor.— We read with great interest the recent article by Kilcoyne and associates entitled Ruptured Baker's Cyst Simulating Acute Thrombophlebitis (240:1517, 1978) because we recently encountered an unusual twist to a case of a patient with a ruptured Baker's cyst. Report of a Case.— A 27-year-old man came to the Bethany Medical Center emergency room complaining of pain and swelling over the posterior aspect of his left calf. The patient had just returned from a 480-km automobile trip but denied a previous history of trauma or swelling to the left leg or knee. Physical examination disclosed swelling, tenderness, and redness of the left calf, with an abnormal Homans' sign. The patient's diagnosis was deep venous thrombophlebitis, and he was admitted to the hospital after initiation of heparin sodium therapy. We were consulted for management of the patient's heparin therapy; however, further examination showed not only the leg findings

Limited proteolysis of potato virus X by trypsin and plant proteases

The effect of method of purification and incubation with trypsin on the amino acid composition and molecular weight of potato virus X (PVX) protein was determined. PVX was prepared by four methods, two of which included incubation of unclarified plant sap at room temperature for 24 hr before addition of organic solvents. The molecular weights of the proteins of PVX determined by SDS polyacrylamide electrophoresis prepared by all four methods was approximately 29,000. The amino acid composition of the proteins of PVX prepared by these methods were similar to previously published compositions of PVX. Upon incubation with trypsin 19 amino acid residues were cleaved from the virus protein without disassembly of the virus. The resulting protein had a molecular weight of 27,000 and a distinctive amino acid composition. Evidence for the action of plant proteases on PVX was found when protein prepared from virus purified by a fifth method showed two components in SDS polyacrylamide gel electrophoresis. The major and minor components had molecular weights of 27,000 and 29,000, respectively. The amino acid composition of this preparation was similar to that of PVX protein obtained after trypsin action. Electron microscopy of some trypsin-treated PVX preparations showed an unusual twisting of particles around each other.

Steroids and Spontaneous Tendon Rupture

To the Editor:— In September, 1962, the author, a 39-year-old physician, ruptured his left Achilles tendon while playing competitive table tennis. It was presumed likely, because of the circumstances, that there was some relationship between the incident and the steroids which were being administered for eczematoid dermatitis. Steroids had been used for several months in doses of 20 to 40 mg of prednisone daily, with the development of severe Cushingoid manifestations. I implicate steroids because of the extensive metabolic aberrations that are known to occur and because the action that precipitated the rupture was seemingly innocuous. An ordinary maneuver, springing forward, caused a complete severance of all the fibers of the Achilles tendon at the attachment to the calf muscles. There were no precipitating factors such as slippery floors or unusual twisting maneuvers, nor was this an initial match played under poor warm-up conditions. It was a typical action performed

Thematic Ambiguity in The Mayor of Casterbridge

fortunately, this plain and straightforward narrative is not sustained, and in the succeeding chapters we become involved in an extremely elaborate and complicated plot. The personalities of the characters are perfectly consistent throughout and, on this plane, we are never subjected to surprises. Nevertheless, it is impossible to predict the probable fate of any of the characters because the series of unlikely events and unusual twists of circumstance which compose the plo t are constantly working against the expectations of the reader. Joseph Warren Beach, generalizing upon this Hardy weakness, comments as follows: