Coherent control of biomolecules

Savolainen, Janne

doi:10.3990/1.9789036526715

Cited by 3 publications

(3 citation statements)

References 143 publications

(286 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This presentation considers backpacking as "way of life" in the context of everyday life information seeking (Savolainen, 1995) and focuses on the search for tourist information by backpackers. Backpackers need to search for information before, during, and even after traveling, in order to make their trip worthy in terms of their money and time.…”

Section: Shan-ju Changmentioning

confidence: 99%

Taking leisure seriously: Information realities in leisure time

Hartel

Stebbins

Fulton

et al. 2006

Proc of Assoc for Info

View full text Add to dashboard Cite

To introduce serious leisure, a concept that serves as a unifying umbrella and theoretical frame for such work, and 2.To showcase fruitful international collaboration underway betwee n leisure 3. science and information studies Background A meaningful area of life is leisure. For many people, leisure is a source of joy, happiness, and physical health (Argyle, 1996, p. 6). In communities leisure creates a sense of fraternity and vitality, it is ". . . the space of friendship, of much parenting and nurture, of community interaction and of the family itself" (Kelly, 1983, p. 23). Moreso than any point in history, leisure is a significant component of everyday life (Argyle, 1996, p. 1;Robinson and Godbey, 1997; Stebbins, 2001, pp. 147-149).To varying degrees all forms of leisure involve information seeking and use (ISU).Enthusiasts take steps to discover what leisure opportunities are available, and to know where, when, and how to participate. The notion of ISU in leisure is proposed in theory and confirmed in empirical research. Savolainen identifies pleasantries, interests, and hobbies as factors in a "way of life" sustained through information seeking (1995, p. 262-265). Information institutions such as the library and Internet are resources for leisure materials, information, and experiences. Surveys report that 87% of library visits are for entertainment (Vavrek, 2001); and the internet is most often a resource for hobbies or fun (Pew, 2005).While leisure involves ISU through outlets like libraries and the Internet, the matter has not been systematically investigated by information researchers. Little is known about the acquisition and use of information in leisure. Instead, 95% of the 3,000 ISU studies since 1966 have focused on scholarly or professional environments (Harris & Dewdney, 1994, p. 9). Since such work settings differ in nature from leisure, it is a mistake to consider extant theories and insights about ISU to pertain to leisure contexts, or be useful in guiding leisure information provision.In response to the relative neglect of leisure as a research subject, and in some cases out of sheer curiosity, scholars of ISU are beginning to explore information phenomena in free time. A landmark study of pleasure reading (Ross, 1999) came to the unexpected conclusion that pleasure readers find information without seeking, confirming that leisure contains unique information phenomena. Subsequently, there have been inquiries into ISU in sex (Spink, Ozmutlu, & Lorence, 2004), the paranormal (Kari, 2001), genealogy (Yakel, 2005), outdoor recreation (Ernest, Level, Culbertson, n.d.) and gourmet cooking (Hartel, 2003). It is premature to attempt a synthesis of this work, since there is great methodological diversity.Several researchers of leisure ISU have come to consensus that serious leisure is an ideal approach for studying ISU in leisure. Serious leisure is a grounded descriptive framework that maps the landscape of leisure and points to its most information-intensive forms. Serious leisure operationaliz...

show abstract

Section: Shan-ju Changmentioning

confidence: 99%

Taking leisure seriously: Information realities in leisure time

Hartel

Stebbins

Fulton

et al. 2006

Proc of Assoc for Info

View full text Add to dashboard Cite

show abstract

“…All measurements are performed on aerated sample at room temperature. Both ZnPc and DMSO are purchased from SigmaAldrich and used without further purification [6,19] . A non-collinear optical parametric amplifier (NOPA) produces the excitation light for ZnPc, so-called pump pulses.…”

Section: Methodsmentioning

confidence: 99%

A new paradigm for photodynamic therapy: coherent control

et al. 2009

Self Cite

View full text Add to dashboard Cite

Photodynamic therapy (PDT) is a treatment based on the interaction of light, photosensitizing agents and tissue oxygen. The light delivery in PDT is usually optimized by controlling the intensity, the spectrum, and/or the dosage of excitation light. In this paper, we introduce a novel method that aims to improve the efficiency of PDT by controlling the phase of the excitation light, an important and so far neglected parameter. This coherent control approach utilizes the coherence properties of light-matter interaction and aims to manipulate the quantum interferences between various available reaction pathways. In general, an outcome of a photochemical reaction can be optimized by enhancing the desired reaction pathways and suppressing other unwanted pathways. Such optimizations can be done by appropriate tailoring of the electric field profile of a broadband coherent excitation light, i.e. ultrafast laser pulse. Here, we used a femtosecond laser source with adaptive pulse shaping together with a molecular feedback in a learning loop to search for and synthesize such 'smart' laser pulses. Our control objective is to enhance the triplet yield of a model photosensitizer zinc phthalocyanine (ZnPc), which then leads to enhancement of the overall PDT process. We use two coherent control schemes where we optimize the ratio between the excited singlet state (S) and triplet state (T) ZnPc molecules both ways (S/T and T/S). We demonstrate a control of 15% over the triplet yield between the found best and the worst pulse shapes. Our preliminary results show that phase shaping can indeed be used in manipulating photosensitizer photophysics and correspondingly the yield of singlet oxygen.

show abstract

“…With this setup, a short laser pulse can be converted into an arbitrary shape in the time domain by changing properties of light in the spectral domain. [13].…”

Section: Introduction To This Thesismentioning

confidence: 99%

Spectral phase shaping for non-linear spectroscopy and imaging

Postma

View full text Add to dashboard Cite

Coherent control of biomolecules

Cited by 3 publications

References 143 publications

Taking leisure seriously: Information realities in leisure time

Taking leisure seriously: Information realities in leisure time

A new paradigm for photodynamic therapy: coherent control

Spectral phase shaping for non-linear spectroscopy and imaging

Contact Info

Product

Resources

About