1,269 research outputs found
Supporting Data for Incorporating Polar Oxazolidinones into Polycyclooctadiene via Frontal Ring-Opening Metathesis Polymerization
No full textA full description can be found in the README.txt file. The files below include raw data used in the corresponding manuscript including: nuclear magnetic resonance (NMR) data, size exclusion chromatography (SEC) data, thermal gravimetric analysis (TGA) data, differential scanning calorimetry (DSC) data, attenuated total reflectance Infrared (IR) data, front velocity data, and front temperature data. The ChemDraw schemes and photos of tensile samples are included as .jpg files. The videos recorded to calculate front velocity are included as .mp4 files. NMR data are included as .fid files and can be opened in any NMR analysis software (e.g. MestReNova). All other raw data was converted to .csv or .txt files for simplicity and can be opened using a spreadsheet editor such as Microsoft Excel.Frontal ring-opening metathesis polymerization (FROMP) is a rapid, facile method that requires little energy input by utilizing the polymerization exotherm to self-propagate. Although FROMP is efficient, its scope has been limited to highly strained monomers to provide enough energy to drive the polymerization front. Copolymerization has been a viable strategy to introduce more diverse monomers to make polar-functionalized dicyclopentadiene-based thermosets. In contrast, analagous FROMP copolymerizations to produce soluble thermoplastics containing polar repeat units have yet to be explored. Herein, we report the frontal copolymerization of cyclooctadiene (COD) with 1–5 mol % of a lower ring-strain oxazolidinone-fused cyclooctene (Oxa) to synthesize polybutadiene-based copolymers. As expected, as the Oxa loading increased, the front velocity decreased by up to 50% and maximum front temperature decreased by ~16 °C compared to pCOD homopolymer. While the degradation and glass transition temperatures were minimally affected, the polar Oxa units greatly influenced crystallization and tensile properties of the resulting materials. In particular, the ductility dramatically increased from 220% strain at break for pCOD to 1900% for copolymers with 5 mol % Oxa. This study provides an easy method to incorporate polar functionality into ubiquitous polyolefins and further demonstrates the impact of dipoles on material properties towards future applications.National Science Foundation (NSF) Center for Sustainable Polymers (CSP) (CHE-1901635)3M Non-Tenured Faculty AwardUniversity of Minnesota (UMN)Minnesota NMR Center: National Institutes of Health (NIH, S10OD011952)American Association for the Advancement of Science (AAAS) Marion Milligan Mason Award for Women in the Chemical SciencesLester C. and Joan M. Krogh Excellence FellowshipUMN Polymer Processing and Characterization Facility: NSF Materials Research Science and Engineering Center (MRSEC) (DMR-2011401)Aguilar-Romero, Jazmin E; Rogan, Elizabeth G; Wong, Allison R; Hosford, Brandon M; Mosconi, Angela L; Lamb, Jessica R. (2025). Supporting Data for Incorporating Polar Oxazolidinones into Polycyclooctadiene via Frontal Ring-Opening Metathesis Polymerization. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/7fxw-6g59
Histological, physical, and chemical factors of various lamb muscles
No full textMuscles (n = 18) were dissected from each side of twenty lamb carcasses. Muscles from the right sides of the carcasses were used to determine weight, length, width, minimum and maximum thickness, objective color measurements, water-holding capacity (WHC), pH, total collagen content, sarcomere length, and fat and moisture content. Muscles from the left sides of the carcasses were aged for seven days and used to determine percent cook loss, and Warner-Bratzler shear force values. The M. teres major was lightest (P < 0.05) in weight and smallest in surface area, while the M. longissimus lumborum was heaviest (P < 0.05) in weight, and the M. serratus ventralis was largest in surface area. M. adductor and M. semimembranosus were found to be the darkest in color (P < 0.05), while the M. latissimus dorsi and M. tensor fasciae latae were the lightest (P < 0.05). M. triceps brachii had the highest WHC and the M. longissimus lumborum the lowest. The M. teres major and M. serratus ventralis had the highest (P < 0.05) pH values. The M. infraspinatus was found to have the highest collagen content (9.00 mg/g) and the M. psoas major revealed the longest sarcomere lengths (3.06 ��m). M. serratus ventralis possessed the highest (P < 0.05) percent fat and the lowest moisture content. M. serratus ventralis had the lowest cook loss (17.1%) and M. supraspinatus had the highest (25.6%). Of the muscles sampled, the M. serratus ventralis was found to have the lowest shear force value (21.8 newtons) and the M. semimembranosus had the highest (42.6 newtons).
Based on the findings of these data, it is likely to conclude that certain muscles may be suitable for individual muscle applications while others may not be suitable or may pose certain palatability problems
Further data on the genus Neuropogon
No full textThe author expands his taxonomic research on the genus Neuropogon (Lichenes, Usneaceae), incorporating the results of his observations on some species in a living state as well as the study of such a large material preserved in different herbaria. The following new entities are described: N. rohmederi M. Lamb, N. rohmederi f. ushuaiensis M. Lamb, N. melaxanthus f. fibrillifer M. Lamb. and N. trachycarpus f. elatior M. Lamb
Snap Cotton Crusher and Separator
No full textPatent for a machine designed for crushing, separating, and cleaning bolls of cotton. Illustrations included
Lamb Production, Lamb Mortality Rates in the Vaseux Band of California Bighorn Sheep
No full textWildland RecreationThis report contains the results of a telemetry project which began on April 25, 1988 and involved locating sheep and determining their lamb production and mortality rates. The objectives of this project were as follows: to monitor radio-tagged and collared ewes to determine the location of lambing sites, to determine lambing and mortality rates by observing sheep, and to describe habitat types used for lambing
Bur-Cotton Thresher, Cleaner and Storage Unloader
No full textPatent for a pneumatic cotton thresher, cleaner, and storage unloader for use in cotton gins
Judicial Restraint Reappraised
No full textThis article is a revised version of the author\u27s chapter in the forthcoming book, S. Halpern & C. Lamb, eds., Supreme Court Activism and Restraint. (Lexington Books, D.C. Heath and Company)
Seed-Cotton Cleaning Machine
No full textPatent for a machine to clean seed cotton. This invention elevates and distributes cotton in the machine for beating, cleaning, and separating all matter from seed cotton on its way to the cotton gins. Illustrations included
The 'true use of reading' : Sarah Fielding and mid eighteenth-century literary strategies.
No full textPhDThe aim of this thesis is to explore, by examining her life and
works, how Sarah Fielding (1710-68) established her identity as an author.
The definition of her role involves her notions of the functions of
writing and reading.
Sarah Fielding attempts to invite readers to form a sense of ties
by tacit understanding of her messages. As she believes that a work
of literature is produced through collaboration between the writer and
the reader, it is an important task in her view to show her attentiveness
toward reading practice. In her consideration of reading, she has two
distinct, even opposite views of her audience: on the one hand a familiar
and limited circle of readers with shared moral and cultural values and
on the other potential readers among the unknown mass of people. The
dual targets direct her to devise various strategies. She tries to
appeal to those who can endorse and appreciate her moral values as well
as her learning. Her writings and letters testify that she is sensitive
to the demands of the literary market, trying to lead the taste of readers
by inventing new forms.
The thesis opens with an overview of Sarah Fielding's career,
followed by a consideration of her critical attention to the roles of
reading. I go on to examine the narrative structures and strategies
she deploys, with a particular emphasis on her use of the epistolary
method. The following chapter deals with her attention to the reading
of the moral message tangibly embodied in her educational writing. It
is followed by an analysis of the activity which earned her a reputation
as a learned woman. Various as the forms of her works are, they invariably
reflect her attempt to balance herself between the two demands of
inventiveness and familiarity
INFRARED-RADIOFREQUENCY TWO-PHOTON LAMB DIP SPECTROSCOPY OF AND
No full text S.M. Freund and T. Oka, Appl. Phys. Lett. 21, 60 (1972).Author Institution: Division of Physics, National Research Council of CanadaThe two-photon Lamb dip technique previously applied to ammonia using infrared and microwave is now extended to the radio-frequency region. If a rotational level of a symmetric top molecule with has double parity, a radiofrequency photon can be ``added” directly to an infrared laser photon using the non-linearlity of the molecular transition process. The two-photon Lamb dips observed are listed below. [FIGURE] The observation gives the difference between the laser lines and molecular absorptions with an accuracy of about 0.5 MHz. Precision molecular constants which supplement recent laser-Stark spectroscopy on are obtained. M. R\”omheld was the holder of a German Academic Exchange Service Fellowship
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