Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2012

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 8131 - 8160 of 22937

Full-Text Articles in Entire DC Network

Effects Of Salinity On Growth, Oxygen Consumption Rate And Ion Regulation In Two Ages Of Alligator Gar Atractosteus Spatula, Daniel Edwin Schwarz May 2012

Effects Of Salinity On Growth, Oxygen Consumption Rate And Ion Regulation In Two Ages Of Alligator Gar Atractosteus Spatula, Daniel Edwin Schwarz

Theses and Dissertations

The alligator gar Atractosteus spatula is a euryhaline fish found in the Gulf of Mexico and surrounding drainages. However, the extent of its hypo-osmotic abilities are not well understood. To determine effect of salinity on growth, metabolic rate, and osmoregulation abilities the following question was developed: when does the alligator gar have the osmoregulatory capabilities to survive in hyperosmotic environments? To answer this question, two different age groups (60 and 330 days after hatch [DAH]) of juvenile alligator gar were exposed to 4 different salinities (0, 8, 16, and 24 ppt) for a 30-day period. Specific growth rate, oxygen consumption …

Go to article

Efficacy And Biodegradability Of Pentachlorophenol In Conventional And Biodiesel Amended Carriers, Saeed Keshani Langroodi May 2012

Efficacy And Biodegradability Of Pentachlorophenol In Conventional And Biodiesel Amended Carriers, Saeed Keshani Langroodi

Theses and Dissertations

Pentachlorophenol (PCP) is widely used as a wood preservative for wood products. It has been proposed that a modified PCP carrier system based on a diesel/biodiesel mixture should be used in place of the conventional diesel/KB3 carrier, but there is some question as to whether or not this modified carrier system can provide the same service life for wood products treated with PCP. The main objectives of this research were to evaluate: 1) the comparative biodegradability of PCP in soil containing either diesel/KB3 or diesel/biodiesel, and 2) the comparative decay resistance of wood treated with formulations containing either diesel/KB3 or …

Go to article

Enhancement And Evaluation Of A Rainfall-Runoff Single Event Model, Germania Salazar Mejia May 2012

Enhancement And Evaluation Of A Rainfall-Runoff Single Event Model, Germania Salazar Mejia

Theses and Dissertations

Planning and design of stormwater facilities (including best management practices and low impact development) involve the calculation of peak flows and runoff volumes. Rainfall-runoff models are frequently utilized to estimate this information. A userriendly rainfall-runoff tool (LIDIA) was developed using Visual Basic for Applications in Microsoft Office Excel. This research showed comprehensive guidelines on how to setup a model in LIDIA and reported the first evaluation of LIDIA using field data. LIDIA hydrologic module was tested using 10-minute rainfall, land cover, soil series, land cover management, and runoff data from two small watersheds in North Mississippi. Eleven storm events, over …

Go to article

Evaluating A Vegetated Filter Strip In An Agricultural Field, Alina Fay Young May 2012

Evaluating A Vegetated Filter Strip In An Agricultural Field, Alina Fay Young

Theses and Dissertations

The use of best management practices has become common in recent years, leading to the need for hydrologic models to predict their behavior and effectiveness. A vegetated filter strip at Mississippi State University was used to test two models: the Hydrologic Simulation Program-FORTRAN Best Management Practices Editor (HSPF BMPrac) and the System for Urban Stormwater Treatment and Analysis Integration (SUSTAIN). Water samples were taken during the Spring of 2011 and tested for sediments and nutrients; HSPF was used for computing flows, sediments, and nutrients. The filter strip was not effective at pollutant removal with removal efficiency rates of 68.1, 91.7, …

Go to article

Evaluating The Mechanism Of Oxalate Synthesis Of Fibroporia Radiculosa Isolates Adapting To Copper-Tolerance, Katie Marie Jenkins May 2012

Evaluating The Mechanism Of Oxalate Synthesis Of Fibroporia Radiculosa Isolates Adapting To Copper-Tolerance, Katie Marie Jenkins

Theses and Dissertations

Four Fibroporia radiculosa isolates undergoing decay of untreated and 1.2% ammoniacal copper citrate treated wood were evaluated for differential expression of citrate synthase (CS), isocitrate lyase (ICL), glyoxylate dehydrogenase (GLOXDH), succinate/fumarate antiporter (ANTI), and a copper resistance-associated ATPase pump (ATPase). Samples were analyzed at 2, 4, 6, and 8 weeks for oxalate and protein production, enzyme activities, and gene expression. ATPase pump expression was increased in the presence of copper when initial oxalate concentrations were low, suggesting it functions in helping the fungus adapt to the copper-rich environment by pumping toxic copper ions out of the cell. A connection in …

Go to article

An Approach For Communities To Assess Stormwater Application And Detention Requirements For Overall Watershed Health, Katherine Therese Lunstrum May 2012

An Approach For Communities To Assess Stormwater Application And Detention Requirements For Overall Watershed Health, Katherine Therese Lunstrum

Theses and Dissertations

One of the many issues communities will face when trying to protect their local watershed is the lack of background their policy makers have in environmental protection and watershed health. The purpose of this study is to test a range of on-site stormwater management policies against a selection of new development projects from a specific small city of the United States in order to determine what combination of policies works best in a particular urban environment. Three policies were selected to test the range of stormwater approaches being used in the United States. These policies were then measured in a …

Go to article

An Assessment Of Student Performance In Career And Technical Education Programs And On Core Academic Subject Areas, Annie Jeanette Snow May 2012

An Assessment Of Student Performance In Career And Technical Education Programs And On Core Academic Subject Areas, Annie Jeanette Snow

Theses and Dissertations

The purpose of this study was to examine the quality of career and technical education programs on high school students. Specifically, the study addressed the percentage of CTE completers meeting Carl Perkins’ placement indicators in the areas of post secondary education, employment in the field trained or related field, and the military. The study examined whether the percentage of dropout for CTE students was reduced between 2006 and 2010. The study examined whether significant differences existed between CTE participants and non-CTE participants (regular high school students) based on their scores in United States History, English II Writing, English II Multiple …

Go to article

An Empirical Analysis Of Factors That Affect Student Non-Attendance At Mississippi State Volleyball, Kurt Charles Mayer May 2012

An Empirical Analysis Of Factors That Affect Student Non-Attendance At Mississippi State Volleyball, Kurt Charles Mayer

Theses and Dissertations

The purpose of this study was to examine which factors were influences in students choosing to not attend women’s volleyball games at Mississippi State University during the 2011 season. A survey was utilized to measure the impact of 41 factors on non-attendance of 620 students in the constructs of non-venue structural constraints (Leisure Activities, Other Sport Entertainment, Financial Cost, Social Commitments, Game On Radio/TV, Work/School/Church Commitments), internal constraints (Lack of Knowledge, Lack of Someone to Attend With, Lack of Success, No Interest from Others) and external constraints (Arena Location and Parking). The results of a chi-square analysis indicated there were …

Go to article

Biomechanical Evaluation Of Locking Compression Plate/Rod Constructs And Limited Contact-Dynamic Compression Plate/Rod Constructs In A Gap Model, Wilburn Maret Maxwell May 2012

Biomechanical Evaluation Of Locking Compression Plate/Rod Constructs And Limited Contact-Dynamic Compression Plate/Rod Constructs In A Gap Model, Wilburn Maret Maxwell

Theses and Dissertations

Fractures occur commonly in veterinary medicine and are usually the result of vehicular trauma. Traditionally, comminuted mid-diaphyseal fractures are repaired with an interlocking nail, dynamic compression plate, or combination of a bone plate with an intramedullary pin. In recent years, the locking compression plate has gained popularity in human orthopedics due to its biomechanical characteristics and stability in osteoporotic or periprosthetic bone. In addition, the plate may be applied in a percutaneous manner, thereby allowing for biological osteosynthesis. This study evaluates the combination of a locking compression plate and an intramedullary pin in a Delrin rod gap model. Modalities tested …

Go to article

Answers In Diagenesis: Assessing Mussel Shell Diagenesis In The Modern Vadose Zone At Lyon's Bluff (22ok520), Northeast Mississippi, Joe Dan Collins May 2012

Answers In Diagenesis: Assessing Mussel Shell Diagenesis In The Modern Vadose Zone At Lyon's Bluff (22ok520), Northeast Mississippi, Joe Dan Collins

Theses and Dissertations

This study considers the chemical alteration of archaeological freshwater shell above the water table at Lyon's Bluff, located in east-central Mississippi, changes in trace element concentrations between unfired and fired shell, and the effect bacteria have on archaeological freshwater shell. Thin-section petrography, X-ray diffraction, cathodoluminescence, and scanning electron microscopy were conducted on archaeological shell from four layers from Unit 20N20W, with a depth of 80 cm spanning 450 years. ICP-MS analysis was also conducted on a modern freshwater shell. Results of the microscopy indicate pristine crystal structure. ICP-MS data show that certain trace elements within the shell maintain their concentration …

Go to article

Aortic Valve Endothelial Cells And Adhesion Molecules: Implications For A Tissue Engineered Heart Valve, Chelsea Tiller Mcintosh May 2012

Aortic Valve Endothelial Cells And Adhesion Molecules: Implications For A Tissue Engineered Heart Valve, Chelsea Tiller Mcintosh

Theses and Dissertations

Children with congenital heart defects and patients with faulty or failing valves have the need for a suitable aortic heart valve replacement. Current treatment options have several downfalls and heavy investigation is being done into the design of an engineered valve to find an alternative that would alleviate many of these issues. Understanding the physiology of how cells interact in vivo is crucial to the construction of such valve. This study investigates the effect of cyclic strain in aortic valve endothelial cells on the adhesion molecules, PECAM-1, ƒÒ1-Integrin, VE-Cadherin and Vinculin. Experiments found that cyclic strain plays a role in …

Go to article

Validation Of Bioluminescent Escherichia Coli O157:H7 For Use As A Pre-Harvest Food Safety Model, Heather Ann Duoss May 2012

Validation Of Bioluminescent Escherichia Coli O157:H7 For Use As A Pre-Harvest Food Safety Model, Heather Ann Duoss

Theses and Dissertations

Cattle are naturally colonized by enterohemorrhagic Escherichia coli within the gastrointestinal tract. The most notorious of the enterohemorrhagic E. coli is E. coli O157:H7, which can cause serious illness to humans if ingested. To ensure that the United States has a safe food supply, research is ongoing in pre-harvest food safety and pathogen intervention strategies. While advances in pre-harvest intervention strategies are encouraging, no method has proven to completely eliminate and/or control O157:H7. A key limitation to successful pathogen intervention strategies is the inability to track and monitor pathogens in a real-time fashion. Through the use of bioluminescent plasmids harboring …

Go to article

Stress Responses And Attachment Of Listeria Monocytogenes In Food, Dongryeoul Bae May 2012

Stress Responses And Attachment Of Listeria Monocytogenes In Food, Dongryeoul Bae

Theses and Dissertations

The rates of the US hospitalization and mortality caused by Listeria monocytogenes was estimated to be the highest of 31 food-borne pathogens including Salmonella, Escherichia coli, Campylobacter, and Clostridium. This pathogen has an ability to survive under extreme conditions widely found in the natural environment and food. Among 13 serovars L. monocytogenes serovar 4b, 1/2a and 1/2b are mainly associated with human listeriosis outbreaks. The deadliest outbreaks of human listeriosis and massive product recalls in multi-states were associated with ready-to-eat (RTE) food products such as mexican-style cheese, turkey deli meat, cabbage, and cantaloupes contaminated with the bacterium. Thus, contamination of …

Go to article

The Biology And Management Of Phytophagous Stink Bugs (Pentatomidae) In Mississippi Soybean Production Systems, James Wesley Mcpherson May 2012

The Biology And Management Of Phytophagous Stink Bugs (Pentatomidae) In Mississippi Soybean Production Systems, James Wesley Mcpherson

Theses and Dissertations

Stink bugs are the most economically important insect pest of soybeans in Mississippi. This study focused on several aspects of stink bug biology and management. One study examined the residual activity of certain insecticides. Rain was shown to reduce residual activity and after three days most insecticides provided very little control of stink bugs. Stink bugs complete at least one generation a year on early season hosts before moving into soybeans. A study of these early season hosts found that rice stink bug was more prevalent on grasses than the other hosts sampled. Brown stink bug was found on all …

Go to article

The Biology And Management Of Tarnished Plant Bug Lygus Lineolaris (Palisot De Beauvois), In Cotton, Gossypium Hirsutum (L.), In The Mississippi Delta, Brian Patrick Adams May 2012

The Biology And Management Of Tarnished Plant Bug Lygus Lineolaris (Palisot De Beauvois), In Cotton, Gossypium Hirsutum (L.), In The Mississippi Delta, Brian Patrick Adams

Theses and Dissertations

In field experiments, managing for earliness through planting date and varietal maturity reduced tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), densities, insecticide applications, and yield loss. A second experiment highlighted the importance of timely insecticide applications for managing tarnished plant bugs. Differences in fitness parameters were observed between tarnished plant bug populations collected from the Hills and Delta regions of Mississippi. Populations from the Delta region laid more eggs and produced more viable offspring than populations from the Hills. Populations from the Delta reared on cotton developed significantly faster to each life stage than those reared on diet or …

Go to article

The Comparative Effects Of Arginine Vasotocin On Reproduction In The Boreal (Bufo Boreas Boreas) And Fowler's (Bufo Fowleri) Toad, Tricia Marie Rowlison May 2012

The Comparative Effects Of Arginine Vasotocin On Reproduction In The Boreal (Bufo Boreas Boreas) And Fowler's (Bufo Fowleri) Toad, Tricia Marie Rowlison

Theses and Dissertations

The aim of this study was to compare the effects of arginine vasotocin (AVT) administration in the endangered boreal toad (Bufo boreas boreas) and common Fowler’s toad (Bufo fowleri). The objectives of this study were to determine if AVT could elicit: 1) calling, and 2) amplexus behaviors. Toads were paired into single male:female groups and administered AVT at varying concentrations: 0.1, 1.0, 5.0, 10.0 and 25.0 μg/g and in different combinations: 1) only male was treated; 2) only female was treated, and 3) both male and female treated. AVT failed to stimulate any breeding behavior in the boreal toad, but …

Go to article

The Association Between Emotional Intelligence And Sexual Risk Behavior Among Undergraduate College Students In The Greater Los Angeles, Deborah E. Ortiz May 2012

The Association Between Emotional Intelligence And Sexual Risk Behavior Among Undergraduate College Students In The Greater Los Angeles, Deborah E. Ortiz

Scripps Senior Theses

Sexual risk behaviors pose a major public health problem. However, sufficient research has not been done on the relationship between health risk behaviors and emotional intelligence. The purpose of this study was to examine the relationship between emotional intelligence, and sexual, smoking, and alcohol behavior among young adults. As well as explore the relationship between health risk behaviors. Emotional intelligence and sexual, alcohol, and smoking behavior of undergraduate college students from the greater Los Angeles area was assessed through an anonymous online questionnaire (n=80). There was no significant difference found in emotional intelligence between college students engaging in risk behaviors …

Go to article

Investigation Of A Possible Association Between Pon1 Polymorphisms L55m And Q192r With Coronary Artery Disease And Type 2 Diabetes Patients Within A Southern Population, Chiquita Yvette Mcdaniel May 2012

Investigation Of A Possible Association Between Pon1 Polymorphisms L55m And Q192r With Coronary Artery Disease And Type 2 Diabetes Patients Within A Southern Population, Chiquita Yvette Mcdaniel

Theses and Dissertations

Mississippi has a very high prevalence of coronary artery disease (CAD) and type 2 diabetes (T2D), especially among African Americans compared to Caucasians. This project determined the L55M genotypes of paraoxonase 1 (PON1) in 187 people and evaluated associations of PON1 single nucleotide polymorphisms (SNPs), Q192R and L55M, with CAD and T2D in a Mississippian (southern) population. Significant associations were found with PON1 SNPs and race: genotypes LL, LM, QR, and RR showed significant associations with race (p values 0.0000955, 0.0024, 0.00001244, and 0.00001676, respectively), and combined genotypes LMQQ and LMRR were significantly associated with race (p values = 0.0001013 …

Go to article

Lipid Accumulation In Synthetic Wastewater-Grown Oleaginous Microorganisms, Andrew Thompson Ford May 2012

Lipid Accumulation In Synthetic Wastewater-Grown Oleaginous Microorganisms, Andrew Thompson Ford

Theses and Dissertations

Wastewater has been shown to contain the necessary nutritive requirements for the growth of microorganisms. The term, oleaginous, has been given to a classification of microorganisms know to produce up to twenty percent of the weight as oil. This study is designed to examine the potential accumulation of lipids within an oleaginous consortium grown on synthetic wastewater. Potential of the fluorescent stain, Nile red, as a lipid detector is also emphasized. Percentages of extractables greater than thirtyive percent were achieved within the oleaginous consortium using a nitrogen-limited medium. Low pH was found to increase the percentages of extractables. Xylose was …

Go to article

Modeling Effects Of Climatological Variability And Management Practices On Conservation Of Groundwater From The Mississippi River Valley Shallow Alluvial Aquifer In The Mississippi Delta Region, Robert Frank Thornton May 2012

Modeling Effects Of Climatological Variability And Management Practices On Conservation Of Groundwater From The Mississippi River Valley Shallow Alluvial Aquifer In The Mississippi Delta Region, Robert Frank Thornton

Theses and Dissertations

Ninety-eight percent of water taken from the Mississippi River Shallow Alluvial Aquifer, hereafter referred to as “the aquifer” or “MRVA,” is used by the agricultural industry for irrigation. Mississippi Delta agriculture is increasingly using more water from the MRVA and the aquifer has been losing about 300,000 acreeet per year. This research expands on previous work in which a model was developed that simulates the effects of climatic variability, crop acreage changes, and specific irrigation methods on consequent variations in the water volume of the MRVA. This study corrects an identified problem by replacing total growing season precipitation with an …

Go to article

Grain Bag Storage Systems: Monitoring, Analysis, And Effects, Jason Kellam Ward May 2012

Grain Bag Storage Systems: Monitoring, Analysis, And Effects, Jason Kellam Ward

Theses and Dissertations

Grain production in the Mid-South US has exceeded traditional grain bin storage capacity in recent years. Alternative grain storage methods were adopted. One method was grain bag storage. This system has been used for silage and high moisture corn storage for decades and has been employed for dry grain in other regions of the world, but little research was available to describe the internal environment of the grain bags and its effects on grain quality. Weather conditions, agricultural methods, and cultural practices vary; therefore further research was required to assess this storage practice and describe best management practices for the …

Go to article

Growth And Swimming Endurance Of Juvenile Channel Catfish In High Temperature Environments, Michael B. Arnold May 2012

Growth And Swimming Endurance Of Juvenile Channel Catfish In High Temperature Environments, Michael B. Arnold

Theses and Dissertations

Channel catfish (Ictalurus punctatus) are important to aquaculture and natural ecosystems, however little is known regarding effects of high summer temperatures, which are predicted to increase with climate change. Therefore, two studies were conducted to examine physiological effects of high temperatures on juvenile channel catfish. The first examined effects of three cycling thermal regimes (23-27°C, 27-31°C, and 31-35°C) characteristic of culture environments in Mississippi on growth, food consumption, feed conversion ratio, specific growth rate, and activity. The second study measured active and resting metabolic rates and swimming endurance at constant temperatures (27, 31, and 35°C). The best growth and feed …

Go to article

Identification And Characterization Of C-Type Lectin Genes In Reniform Nematode, Satish Ganji May 2012

Identification And Characterization Of C-Type Lectin Genes In Reniform Nematode, Satish Ganji

Theses and Dissertations

Reniform nematode, Rotylenchulus reniformis is a semi-endoparasitic nematode infecting over 300 plant species including important fiber crops like cotton. Introgression of reniform nematode resistance from a distantly-related resistant species Gossypium longicalyx into cultivated upland species Gossypium hirsutum has been a challenge. An approach towards achieving nematode resistance in crop plants has been to identify candidate parasitism genes expressed in the nematode facilitating infection of host plant species, and silencing the same through reverse genetic approaches like RNAi. A cDNA library constructed from the sedentary female stage of reniform nematode revealed an EST coding for C-type lectins and occurring in high …

Go to article

Impact And Management Of Twospotted Spider Mite In Pre-Flowering Cotton, William Sidney Scott May 2012

Impact And Management Of Twospotted Spider Mite In Pre-Flowering Cotton, William Sidney Scott

Theses and Dissertations

Experiments were conducted to determine the impact of twospotted spider mite, Tetranychus urticae Koch, on cotton injury and yield. Artificial infestations were initiated at the three leaf stage of cotton growth and removed after specified durations of infestation. Yields were reduced for durations of infestation 21 days or greater. In a second experiment, the interactions between twospotted spider mite, thrips, at-planting insecticides, and foliar insecticides were studied to determine their impact on cotton yields. Twospotted spider mites and thrips reduced cotton yield. In a third experiment, twospotted spider mites were released from a central point in 0.024 hectare blocks of …

Go to article

Statistical Approaches To Philippine Literature, Jose Nilo Binongo, M.W.A. Smith May 2012

Statistical Approaches To Philippine Literature, Jose Nilo Binongo, M.W.A. Smith

Philippine Studies: Historical and Ethnographic Viewpoints

No abstract provided.

Go to article

Intuitive Tip Of The Tongue Judgments Predict Subsequent Problem Solving One Day Later, Azurii K. Collier, Mark Beeman May 2012

Intuitive Tip Of The Tongue Judgments Predict Subsequent Problem Solving One Day Later, Azurii K. Collier, Mark Beeman

The Journal of Problem Solving

Often when failing to solve problems, individuals report some idea of the solution, but cannot explicitly access the idea. We investigated whether such intuition would relate to improvements in solving and to the manner in which a problem was solved after a 24- hour delay. On Day 1, participants attempted to solve Compound Remote Associate problems, for which they viewed three problem words (crab, sauce, pine) and tried to generate one solution word (apple) that could form a compound word with each problem word (crabapple, applesauce, pineapple). For problems they failed to solve, participants reported whether they had an intuitive …

Go to article

Visual Attention Modulates Insight Versus Analytic Solving Of Verbal Problems, Ezra Wegbreit, Satoru Suzuki, Marcia Grabowecky, John Kounios, Mark Beeman May 2012

Visual Attention Modulates Insight Versus Analytic Solving Of Verbal Problems, Ezra Wegbreit, Satoru Suzuki, Marcia Grabowecky, John Kounios, Mark Beeman

The Journal of Problem Solving

Behavioral and neuroimaging findings indicate that distinct cognitive and neural processes underlie solving problems with sudden insight. Moreover, people with less focused attention sometimes perform better on tests of insight and creative problem solving. However, it remains unclear whether different states of attention, within individuals, influence the likelihood of solving problems with insight or with analysis. In this experiment, participants (N = 40) performed a baseline block of verbal problems, then performed one of two visual tasks, each emphasizing a distinct aspect of visual attention, followed by a second block of verbal problems to assess change in performance. After participants …

Go to article

Marine Sponges As Bioindicators Of Nitrogen Within Estuaries On The Oregon Coast, Amy Hammerquist, Stacia Cowgill, Matthew Creech May 2012

Marine Sponges As Bioindicators Of Nitrogen Within Estuaries On The Oregon Coast, Amy Hammerquist, Stacia Cowgill, Matthew Creech

Science and Social Sciences

As filter feeders, sponges are highly integrated with their environment. Many sponges also host diverse communities of bacteria, including many that are hypothesized to carry out a variety of nitrogen transformations. The presence of these bacteria makes sponges an integral part of the nitrogen cycle in their habitats and suggests that sponges are an excellent bioindicator of environmental conditions. To test these hypotheses, we collected sponge tissue from two Oregon estuaries and extracted microbial DNA from these samples. To assess bacterial diversity, we performed Denaturing Gradient Gel Electrophoresis (DGGE) on a fragment of the 16S gene. We also examined nitrogen …

Go to article

Surface-Enhanced Raman Spectroscopy Of Peptides Adsorbed On Silver And Gold Nanoparticles In Aqueous Solutions, Stephanie L. Stovall May 2012

Surface-Enhanced Raman Spectroscopy Of Peptides Adsorbed On Silver And Gold Nanoparticles In Aqueous Solutions, Stephanie L. Stovall

Science and Social Sciences

Distinguished from standard techniques of bioanalysis, the high specificity of Raman spectroscopy provides information on a molecular level without tagging the biomolecule. Surface-enhanced Raman spectroscopy (SERS) is a surface-sensitive technique that enhances Raman scattering by a factor up to 1011, increasing sensitivity when molecules are adsorbed to silver (Ag) and gold (Au) nanoparticles. To characterize the physical and chemical properties of di- and tri-peptides, SERS spectra of Gly-Tyr, Phe-Gly-Gly and Val-Tyr-Val were obtained by adsorbing the peptides to Ag and Au nanoparticles in aqueous solutions. The predominance of vibrations and dominant peaks originating in individual amino acid residues …

Go to article

Surface-Enhanced Raman Scattering Of Invertase On Silver Nanoparticles, Kathryn L. Corp, Brian D. Gilbert May 2012

Surface-Enhanced Raman Scattering Of Invertase On Silver Nanoparticles, Kathryn L. Corp, Brian D. Gilbert

Science and Social Sciences

Surface-enhanced Raman spectroscopy (SERS) is a highly sensitive technique to characterize molecules. Proteins have been a key substrate in recent studies with SERS because of their ability to bind strongly and distinctively to other molecules. In this study, the SERS spectrum of β-fructofuranosidase (invertase) was characterized on silver colloids and silver nanoparticle surfaces. Aromatic amino acid and cystine vibrations dominate the SERS spectrum of most proteins, including invertase. Specifically peaks at 812 (tyr), 962 (trp, tyr), 1092 (trp W14, tyr), 1159 (trp W12), 1294 (tyr), 1327 (trp, tyr), 1555 (tyr, trp W3), and 1613 (phe F8a, tyr Y8a, trp W1) …

Go to article

First Prev Next Last