1,727,163 research outputs found
Dan LeVan Folder
No full text10 pages of family history documents containing and related to Dan Hastings LeVan; Prince of Pines; Persis Dee; Wanda LeVan - including: Story recollections by Dan LeVan Junio
[Letter from Geo. W. LeVan to T. N. Carswell - June 17, 1954]
No full textA letter written to Mr. T. N. Carswell, Abilene, Texas, from Geo. W. LeVan, Division Head, Humble Oil & Refining Company, Houston 1, Texas, dated June 17, 1954. LeVan confirms the execution of a Division Order by Carswell covering oil purchased from the LUCY M. COLEMAN tract and advises of an enclosed amended Division Order to be executed and returned promptly to avoid delay in the settlements for June oil
Annotated checklist of Georgian oribatid mites-II
No full textMurvanidze, Maka, Todria, Nino, Maraun, Mark, Mumladze, Levan (2023): Annotated checklist of Georgian oribatid mites-II. Zootaxa 5227 (1): 50-62, DOI: https://doi.org/10.11646/zootaxa.5227.1.
W.S. LeVan of Ross Packing Company letter to Senator Wesley Jones regarding prohibition, January 6, 1932
No full textW.S. LeVan of Ross Packing Company writes to Washington State Senator Wesley Jones to express his disapproval of prohibition. LeVan asks why prohibition is still in effect when it "is not enforceable." He also tells a story of a trip to Canada in which he was able to purchase liquor but did not witness any displays of public drinking, and that he was "astonished at the peaceful appearance of...these cities, and the apparent respect the people have for the laws." He then asks, "If Canada can control her liquor business, why on earth can we not do likewise?"Prohibition in the United States was ratified under the 18th Amendment in 1919 and officially established in 1920, making the transport, sale, and production of alcohol illegal. The National Prohibition Act, commonly referred to as the Volstead Act, was subsequently passed to establish methods of enforcing the law. Washington State passed a statewide prohibition law in 1914, then became the 22nd state to ratify the national bill in 1919. Prohibition became hugely popular due to the efforts of organizations such as the Prohibition Party, Anti-Saloon League, and the Women’s Christian Temperance Union, who championed the movement on health and moral grounds. Due to the inefficient enforcement of the law and increasing crime rates from black market sales of alcohol the 18th Amendment was repealed in 1933 with the passing of the 21st Amendment.
Wesley Livsey Jones was a Republican Senator from Washington State, serving from 1909 to 1932. During his time in the Senate, Jones champ
Consumers' Willingness to Pay for Animal Welfare Attributes in Dairy Products: Evidence From Experimental Auctions
No full textConsumer/Household Economics, Demand and Price Analysis, Livestock Production/Industries,
Levan Center Emerging Technologies
No full textAbstract Nova Southeastern University, Inc., on behalf of its Alan B. Levan | NSU Broward Center of Innovation (Levan Center), proposes Levan Center Emerging Technologies to acquire equipment that will be used to develop and train individuals in emerging technologies such as augmented and virtual realities, artificial intelligence, volumetric capture studio equipment, development software, and high-performance computers. The technologies will be accessed by entrepreneurs, founders, and individuals looking to develop products using the technologies or are seeking to know more about emerging technologies. Most of the technology will be housed in the Levan Center Technology Makerspace and serve entrepreneurs from various fields such as aviation/aerospace, financial services, global logistics, life sciences, manufacturing, marine, and others. The Levan Center will build the volumetric capture studio in a space near its technology makerspace, and will work with partners like PeakActivity, Unity, and Microsoft to develop training programs, policies and procedures for use by entrepreneurs. Having the technology available at the Levan Center of Innovation will ensure accessibility by individuals who normally would not have access to the latest technologies. The Levan Center will work with local governments, community-based organizations, and other state colleges nearby to conduct outreach activities as a way to increase awareness of career paths within the emerging technologies. Expected outcomes include breakthrough ideation, development of new technologies, talent skills pipeline, job creation, new company formation, and the scaling of early-stage and young companies
Bioactivity of levan based surfaces
No full textLEVAN TEMELLİ YÜZEYLERİN BİYOAKTİVİTESİ Polisakkaritler, yapıları gereği pek çok biyolojik aktiviteye sahiptirler. Günümüzde, mevcut antikoangülanlara ve biyouyumlu malzemelere benzer, biyouyumluluk gösteren, antikanser aktiviteye sahip antikoagülasyon özelliği yüksek doğal veya kimyasal olarak modifiye edilmiş polisakkaritlere olan ilgi artmaktadır. Doğal veya kimyasal olarak değiştirilerek elde edilen sülfatlanmış polisakkaritler, antikoagülan (pıhtı önleyici) etkinlik gösteren biyoaktif maddelerdir. Heparin, hayvansal kaynaklı ve kendiliğinden sülfatlı bir polisakkarit olup en çok kullanılan antikoagülandır. Heparini elde etmenin zorlukları, heparinin yapısal heterojenitesi, kontaminasyon riski ve kullanımında yol açtığı ciddi sağlık sorunları nedeniyle heparin benzeri yeni antikoagülan maddelerin geliştirilmesine yönelik kapsamlı araştırmalar yapılmaktadır. Levan, fruktoz monomerlerinden oluşan fruktan tipi bir doğrusal polimerdir. Suda çözünebilir, güçlü yapışkan ve film oluşturabilir bir ekzopolisakkarit (EPS) olması sebebiyle işlevsel bir biyopolimer olarak medikal ve kimyasal endüstrilerinde gittikçe yükselen bir popülariteye sahiptir. Heparin benzeri alternatiflere olan ihtiyacın yanında levan temelli biyomateryallerin potansiyel biyomedikal uygulamaları da göz önüne alınarak başlatılmış olan çalışmalarda, levan türevlerinin antikoagülan madde olarak kullanım potansiyelinin aydınlatılması hedeflenmiştir. Bu amaçla halofilik Halomonas smyrnensis AAD6T bakterisi tarafından üretilen levan polimeri, yapısına sülfat grupları katılacak şekilde kimyasal olarak değiştirilmiştir. Daha sonra, sentezlenen levan sülfat polimerlerinin antikoagülasyon aktivitelerinin hangi mekanizma üzerinden gerçekleştiğini açıklamak üzere çeşitli koagülasyon testleri (PT, APTT, TT ve Heptest) gerçekleştirilmiştir. Sonuçlar, sülfatlanmış levanın, kan pıhtılaşma mekanizması üzerinde, hem dozaj hem de izlediği yol bakımından heparin benzeri bir antikoagülan etkiye sahip olduğunu göstermiştir. Bu çalışmalara parallel olarak, bu tez kapsamında, sülfatlanmış levan polimerinin antikanser aktivitesi ve biyouyumluluğu araştırılmıştır. Aynı zamanda, lazer ile direkt yazma teknolojileri (LDW) kullanılarak sülfatlanmış levan polimerinin ince film kaplamaları elde edilip yüzeylerin biyouyumluluğu test edilmiştir. Levan sulfatın MCF-7 (insan göğüs adenokarsinoma) hücreleri üzerine antikanser aktivitesi yeterli derecede değilken L929 (mürin fibroblast) hücreleri üzerinde yüksek biyouyumluluk göstermiştir. Hücreler en yüksek dozla inkübe edilmesine ramen %61 canlılık göstermiştir.Polysaccharides have biological activities due to their structural features. Nowadays, there is an increased interest in natural or chemically modified polymers with high anticoagulant activity, biocompatibility and anticancer activities which have similar activities to anticoagulants and biocompatible implants in present. Natural or modified sulfated polysaccharides are bioactive substances which exhibit anticoagulant (clot inhibitor) activity. Heparin, which is an animal sourced and naturally sulfated polysaccharide, is the most frequently used anticoagulant. Due to the difficulties in obtaining heparin, contamination risks and its structural heterogenity as well as serious health problems associated with its use, considerable research has been directed towards the development of new anticoagulant agents that could mimic heparin. Levan is a linear, fructan-type homopolymer of fructose residues. It is a water soluble, strongly adhesive and film forming exopolysaccharide (EPS), which is gaining escalating popularity as a functional biopolymer with diverse applications in medical and chemical industries. Considering the potential biomedical applications of levan- based biomaterials as well as the urgent need for heparin-mimetic alternatives, studies were initiated to elucidate the potential use of levan derivatives as anticoagulation agents in various applications. For this, levan polysaccharide produced by halophilic Halomonas smyrnensis AAD6T bacteria were chemically modified to integrate sulfate groups to its structure and the sulfated levans were shown to exhibit similar anticoagulant effect to heparin on blood clotting mechanism in terms of both dosage and inhibition pathway. As part of these ongoing studies, within the scope of this thesis, biological activities such as biocompatibility and anticancer activity of levan sulfate polymer were investigated. Moreover, levan sulfate thin film coatings were deposited with the use of Laser direct writing (LDW) Technologies and the biocompatibility of the surfaces were investigated with in vitro cell culture tests. Though the anticancer activity of levan sulfate against MCF-7 (human breast adenocarcinoma) cells was not at significant levels, biocompatibility of the levan sulfate polymer against L929 cell line was very high such that cell viability was about 61% even when cells were treated with the highest concentration
Levan and Levan/Pullulan Blend Films: AFM and FTIR Spectroscopy Characterization
No full textThe numerous naturally occurring biopolymeric materials are used as edible films and coatings (lipids, proteins, and polysaccharides). Microbial levan and pullulan have been already considered as biopolymers in food industry. The aim of this work was to obtain the levan and levan/pullulan blend films and compare them using the Atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). Two different films compositions were prepared by casting method: levan and levan/pullulan in the proportions 1:1. AFM measurements showed that levan film had a smoother surface and, consequently, a lower degree of roughness comparing to the levan/pullulan blend films. FTIR spectra showed peaks, which corresponded to all components of the obtained films.Poster: [https://cer.ihtm.bg.ac.rs/handle/123456789/3984
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