Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 51 for “"Tanning"”.
-
Mineral tanning mechanisms: a fundamental study
A review across the periodic table of tanning effects of simple inorganic compounds reveals that many elements are capable of being used to make leather. But, if the practical criteria of effectiveness, availability, toxicity and cost are applied, the useflul options reduce to chromium ([III) the …
-
Rapid vegetable tanning of heavy leather
Thesis: M.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1936
-
Fundamental aspects of the chrome tanning reaction
… in the secondary structure of collagen during tanning. Complete breakdown of chrome tanned collagen was achieved by the use of a cocktail of proteolytic enzymes: this allowed an analysis of the isolated crosslinks, which indicated preferred reaction at aspartate sidechain carboxyls. This is …
-
Phenolic reactions for leather tanning and dyeing
… polymerisation products were used for tanning collagen. The denaturation (shrinkage) temperature of collagen was raised to 80°C through hydrogen bonding interactions between the polymers and the protein. For dyeing of hide powder, the lignin degradation products were reacted with …
-
An application of work simplification to the tanning industry
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Business and Engineering Administration, 1941.
-
Use of reactive chrome-complexes for the tanning of leather
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1953
-
The recovery of acetic acid from wastes of tanning extract manufacture
The tannin extract industry disposes of large volumes of condensate liquors evolved during concentration of weak leach liquors obtained by extraction of wood chips. The liquors are highly corrosive due to acetic acid contained therein along with lesser quantities of other organic substances common …
-
Psychosocial Predictors of High School Adolescents' Sun-tanning and Sun-protective Behaviors
… PREDICTORS OF HIGH SCHOOL ADOLESCENTS' SUN-TANNING AND SUN-PROTECTIVE BEHAVIORS MAJOR PROFESSOR: Dr. Roberta Ogletree Background: The incidence of skin cancer among adolescents and young adults is increasing in the United States (American Cancer Society, 2014). Ultraviolet radiation (UVR) …
-
Investigating the Role of Appearance-Based Factors in Predicting Sunbathing and Tanning Salon Use
… the motives for sunbathing and indoor tanning is an extremely important public health issue. UV exposure via sunbathing and utilization of sun lamps and tanning beds are considered important risk factors for the development of skin cancer. Psychosocial models of UV exposure are often …
-
Artificial Tanning Salon Behaviors, Intentions, and Attitudes in Terms of Sensuousness and Sensation Seeking.
… and sensation seeking to individuals' tanning salon behaviors, intentions, and attitudes among undergraduates at a Southeastern university.</p> <p>Females, high sensation seekers, those high in warmth sensuousness, and those with darker skin types were more likely to tan. Females were …
-
Investigations on Dry Beans (Phaseolus Vulgaris L.): Microstructure, Processing, and Antinutrients (Phytic Acid, Tanning, Enzyme Inhibitors)
The role of microstructure in processing and effects of several processing methods on antinutrients of dry beans were investigated. Proximate composition of whole beans showed minor differences among the ten varieties investigated. Most correlations between selected chemical constituents and …
-
The nature of a constituent of quebracho tannin.
Tanning is defined as a process of skin treatment whereby the hot water shrinkage point of the skin is raised, the fibres of the skin substance are prevented from mutually adhering on drying, and the skin substance is protected from putrefaction under ordinary conditions in air. There are various …
-
Biodegradation of leather solid waste
… as well as process efficiency. However, tanning agents that prolong the lifetime of leather goods have a negative impact on biodegradation and this needs to be addressed before efficient treatment can occur. To drive the agenda this research has the aims of • Highlighting the effects of …
-
Enzymatic polymerisation in situ of depolymerised mimosa tannin applied to stabilisation of collagen
Vegetable tannins used in tanning of hides and skins are limited to surface reactions by their large molecular weights. The molecular weight reduces penetration into the skin and lowers the thermal stability or tanning effect. Investigation into the utilisation of small phenolic compounds such as …
-
The impact of the leather manufacturing process on bacterial growth
… conditions present during a conventional tanning process due to hazardous chemicals may prevent the growth of bacteria present on hides/skins. On the other hand, partial or total replacement of the hazardous chemicals with non-hazardous chemicals, during a best available technologies (BAT) …
-
Studies on the hydro-thermal and viscoelastic properties of leather
… of collagen molecules. It is also shown that tanning agents act as plasticisers and depress the glass transition temperature to a lower temperature. Thus the tanning process itself may be viewed as a plasticisation of the collagen molecule. In this event, tanning molecules interpose themselves …
-
Art and Becoming-Animal: Reconceptualizing the Animal Imagery in Dorothea Tanning's Post-1955 Paintings
In 1955, American artist Dorothea Tanning abandoned her figurative Surrealist renderings of dream-like scenarios in favor of a complexly abstract and fragmented style of painting. With few exceptions, the ways in which Tanning’s later works function independently of her earlier paintings tends to …
-
Attitudes and Behaviors of Adolescents toward Sunbathing and Sunscreen Use.
… to be more likely to engage in intentional suntanning efforts, to stay in the sun for a longer duration, and to be more likely to use sunscreen yet to report higher incidence of sunburns. Those with a healthy lifestyle attitude are as likely to engage in intentional tanning, although they are …
-
The influence of power ultrasound on leather processing
… kHz, 1.3 W cm2) on the dyeing, fatliquoring and tanning of leather have been investigated and the mechanisms whereby ultrasound influences these processes were elucidated. Compared with a conventional process, ultrasonic dyeing can either shorten the dyeing time by 40-70% or facilitate low …
-
Preventing Skin Cancer in Adolescent Girls Through Intervention with Their Mothers
<p>Indoor tanning (IT) before the age of 35 increases one’s risk for melanoma by 75%, and epidemiological data show a 6.1% annual increase in the incidence of melanomas in white women younger than age 44 in the US. Population-based studies reveal that 15% of adolescents and 8% to 14% of their …
Page 1 of 3