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Operetta The Melting Pot
No full textScene from the operetta The Melting Pot. Pictured are 5 students kneeling on the stage in pilgrim costumes, reading from books. Behind them stands a large pot on a fire as the backdrop. The back is labeled: The Puritans - Pioneers. Horace Mann Laboratory School, Kansas State Teachers College, Pittsburg, Kansas. Mrs. Edwina Fowler, Supervisor of Music. Dr. Jane M. Carroll, Director.https://digitalcommons.pittstate.edu/unihistoryphotos/1174/thumbnail.jp
Children on Horace Mann stage
No full textMany children sit and stand in costume on Horace Mann\u27s stage. Labeled: Childrens [choir fun?]https://digitalcommons.pittstate.edu/unihistoryphotos/1197/thumbnail.jp
Wonderment
No full textAn image of an elderly woman\u27s face being studied and touched and carefully studied by a young toddler.https://digitalcommons.pittstate.edu/wideopenspace/1014/thumbnail.jp
Bowyer, Lawrence L., Collection, 1949
Get PDFThe collection contains a typewriter that belonged to Lawrence L. Bowyer, a resident of Pittsburg, Kansas.https://digitalcommons.pittstate.edu/fa/1433/thumbnail.jp
Effect of Halide in Ammonium Salts in the Addition of Benzoic Acid to Styrene Oxide
Get PDFNucleophilic additions to epoxides are an important class of reactions in organic chemistry which have found use in material science, as intermediates, and in the synthesis of biologically important compounds. Many nucleophiles add to epoxides via a SN2 mechanism at the least substituted carbon. However, under acidic conditions addition is at the most substituted carbon via a SN1 mechanism. Included within this class of reactions is the addition of carboxylic acids to epoxides using tetrabutylammonium bromide as the catalyst. These reactions are straight forward and give high yields of the product. However, previous work in our lab using phthalimide as the nucleophile showed a faster reaction rate with tetrabutylammonium fluoride. Due to this result, we were interested in studying the effect of halide on the addition of benzoic acid to styrene oxide. To better understand this reaction and the role of the catalyst, the halide of the ammonium salt was varied (F-, Cl-. Br‑, and I‑). Reaction times were determined by IR spectroscopy and the product ratio was determined using proton NMR spectroscopy. The results, reaction times and ratio of products, of these studies will be reported
Toward Utilization of Agricultural Wastes: Development of a Novel Keratin Reinforced Soybean Meal-based Adhesive
Get PDFThe development of low-cost bio-based formaldehyde-free adhesives has aroused widespread interest in the wood adhesive industry. In this study, a series of aldehyde-free adhesives were prepared from soybean meal (SM) and chicken feather (CF), which were both largely produced from agricultural wastes. The incorporation of 10 wt % of keratin and calcium phosphate oligomer (CPO) significantly reinforced the performance of the fabricated adhesive material (namely, SMK10-CPO10). The dry and wet bonding strength of SMK10-CPO10 improved to 3.01 and 1.46 MPa, which was 1.75 and 2.15 times that of the adhesive made with SM alone (1.72 and 0.68 MPa), respectively. Meanwhile, the viscosity of the adhesive decreased from 40.77 (SM alone) to 22.32Pa·s (SMK10-CPO10), which apparently improved the fluidity and wettability of the protein-based adhesive. This work not only put forward a novel method to prepare the green high-performance bio-based adhesive but also opened up a new way for the utilization of waste resources and a new strategy for the design and synthesis of advanced structural and functional materials
Biobased Polyester Composites with Improved Antibacterial Characteristics Are Made By Integrating a Thermally Treated Waste Scallop Shell Modifier
Get PDFNew antibacterial properties of a composite made from thermally treated white scallop shell powder (TWWSSP) and modified polylactide (MPLA) are described. The carbonate waste was calcined at 1000 °C to produce calcium oxide (CaO) and calcium hydroxide (Ca(OH)2). The content and structure of the calcined product were examined using energy dispersive spectrometry, Fourier transform infrared spectroscopy and X-ray diffraction. TWWSSP was tested to establish its efficacy as a bactericidal component when combined with MPLA to produce composites. Infrared spectroscopy, tensile, and morphological research revealed that TWWSSP and PLA adhered better to composites and were more compatible than PLA/WWSSP composites. The results of the MTT assay and cell adhesion test of composites revealed that the relative growth rate of Mus dunni fibroblast (MDFB) cells rose with increasing TWWSSP concentration in the composites, indicating that the composites were not cytotoxic. Aside from that, MPLA composites including TWWSSP demonstrated significantly increased antibacterial activity of TWWSSP and MPLA, with the highest results obtained with MPLA and TWWSSP. MPLA/TWWSSP and PLA/WWSSP composites have excellent antibacterial and biodegradable qualities, making them ideal for a wide range of applications, particularly food packaging and biomedical products
Controlled Branching by Step-Growth Polymerization of Xylitol and Succinic Acid via Microwave Irradiation
Get PDFCopolymerization of xylitol usually yields crosslinked materials. In this work, microwave-assisted polyesterification of xylitol and succinic acid produced materials with diverse molecular weights and different branching degrees, and more importantly, no cross-linking was observed, as supported by the solubility behaviour and spectroscopic data. Reactions were carried out for short times, less than 20 min, which is not common for production of industrial polyesters. Control over the branching degree was achieved by tuning the reaction conditions, such as temperature, time of exposure, and monomer ratio, during microwave irradiation. No solvent or catalyst was employed during the step-growth polymerization
James Anderson Yates Portrait
No full textPortrait of James Anderson Yates hanging inside of Yates Hallhttps://digitalcommons.pittstate.edu/unihistoryphotos/1249/thumbnail.jp
Yates from Grubbs
No full textColor photograph of Yates Hall and the Kelce Planetarium as seen from across the street at Grubbs Hall.https://digitalcommons.pittstate.edu/unihistoryphotos/1256/thumbnail.jp