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Keith J. Stine
University of Missouri–St. Louis
LangmuirOrganic chemistryChemistryNanoporousMonolayer
85Publications
21H-index
1,837Citations
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Publications 95
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#1Jay K. Bhattarai (UMSL: University of Missouri–St. Louis)H-Index: 6
#2Dharmendra Neupane (UMSL: University of Missouri–St. Louis)H-Index: 1
Last. Keith J. Stine (UMSL: University of Missouri–St. Louis)H-Index: 21
view all 6 authors...
Abstract The use of a metallic adhesion layer between plasmonic-active nanostructures and a solid supported is known to dampen the plasmonic response. To overcome this problem, organic adhesion layers have been introduced, which in turn can undermine the stability of the film. Moreover, both types of layers limit the regeneration of the nanostructures for multiple uses. Here we report a quick and simple approach to prepare intermediate adhesion layer-free binding of nanostructured films of gold ...
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#1Mithila D. Bandara (MU: University of Missouri)H-Index: 1
#1Mithila D. Bandara (MU: University of Missouri)
Last. Alexei V. DemchenkoH-Index: 31
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The first chemical synthesis of lacto-N-neohexaose (LNnH) has been completed using a convergent synthetic strategy. The reac-tion conditions and donor-acceptor combinations have been carefully refined to minimize side reactions and achieve high yields in all glycosylation steps. Lacto-N-neotetraose, another common human milk oligosaccharide, was also synthesized en route to the target LNnH
1 CitationsSource
#1Matteo Panza (UMSL: University of Missouri–St. Louis)H-Index: 1
#2Keith J. Stine (UMSL: University of Missouri–St. Louis)H-Index: 21
Last. Alexei V. Demchenko (UMSL: University of Missouri–St. Louis)H-Index: 31
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Reported herein is the development of a user-friendly platform for simple and transformative automation based on standard HPLC equipment. We showcase how the improved platform works in application to the completely automated, a “press of the button,” synthesis of various glycan sequences. The preparative autosampler is used for delivering all glycosyl donors and all reagents for all steps. The two-way split valve can direct the flow from the discharge to the product collection mode without the o...
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#1Jay K. BhattaraiH-Index: 6
#2Helal Uddin MarufH-Index: 1
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Plasmonic-active nanomaterials are of high interest to scientists because of their expanding applications in the field for medicine and energy. Chemical and biological sensors based on plasmonic nanomaterials are well-established and commercially available, but the role of plasmonic nanomaterials on photothermal therapeutics, solar cells, super-resolution imaging, organic synthesis, etc. is still emerging. The effectiveness of the plasmonic materials on these technologies depends on their stabil...
1 CitationsSource
#1Palak SondhiH-Index: 1
#2Helal Uddin MarufH-Index: 1
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Lipopolysaccharides (LPS) are endotoxins, hazardous and toxic inflammatory stimulators released from the outer membrane of Gram-negative bacteria, and are the major cause of septic shock giving rise to millions of fatal illnesses worldwide. There is an urgent need to identify and detect these molecules selectively and rapidly. Pathogen detection has been done by traditional as well as biosensor-based methods. Nanomaterial based biosensors can assist in achieving these goals and have tremendous p...
2 CitationsSource
#1Mithila D. Bandara (UMSL: University of Missouri–St. Louis)H-Index: 3
#2Keith J. Stine (UMSL: University of Missouri–St. Louis)H-Index: 21
Last. Alexei V. Demchenko (UMSL: University of Missouri–St. Louis)H-Index: 31
view all 3 authors...
The first synthesis of lacto-N-hexaose (LNH) has been completed using a convergent strategy. The donor–acceptor protecting–leaving group combinations were found to be of paramount significance for achieving successful glycosylations and minimizing side reactions. Lacto-N-tetraose, another common human milk oligosaccharide, was also obtained en route to the target LNH.
1 CitationsSource
#1Mithila D. Bandara (UMSL: University of Missouri–St. Louis)H-Index: 3
#2Keith J. Stine (UMSL: University of Missouri–St. Louis)H-Index: 21
Last. Alexei V. Demchenko (UMSL: University of Missouri–St. Louis)H-Index: 15
view all 3 authors...
Abstract The total chemical synthesis of lacto-N-tetraose (LNT) has been completed using both convergent and linear strategies. Similarly to that of our previous HMO syntheses, the donor-acceptor protecting-leaving group combinations were found to be of paramount significance to achieving successful glycosylations and minimizing side reactions.
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#1Bishal NepalH-Index: 1
#2Keith J. StineH-Index: 21
The glycoalkaloids which are secondary metabolites from plants have proven to be of significant interest for their biological properties both in terms of their roles in plant biology and the effects they exhibit when ingested by humans. The main feature of the action of glycoalkaloids is their strong binding to 3β-hydroxysterols, such as cholesterol, to form complexes with the consequence that membrane structure is significantly perturbed, and leakage or release of contents inside cells or lipos...
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The field of nanomaterials continues to expand with the discovery of new nanostructures opening up new possibilities for both the study of unique physical properties and new applications [...]
1 CitationsSource
#1Salvatore G. Pistorio (UMSL: University of Missouri–St. Louis)H-Index: 4
#2Scott A. Geringer (UMSL: University of Missouri–St. Louis)H-Index: 1
Last. Alexei V. Demchenko (UMSL: University of Missouri–St. Louis)H-Index: 15
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Presented herein are two complementary approaches to the synthesis of the core N-glycan pentasaccharide. The first, a traditional manual approach in solution, makes use of the H-bond-mediated aglycone delivery method for the highly diastereoselective introduction of the β-mannosidic linkage at room temperature. The synthesis of the core pentasaccharide was also accomplished using an high-performance liquid chromatography-assisted automated approach. The overall assembly was swift (8 h) and effic...
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