Gregory Stock

Gregory Stock
University of Applied and Sciences · Engineering

About

58
Publications
16,638
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446
Citations

Publications

Publications (58)
Article
Polycaprolactone/polyvinyl alcohol (PCL/PVA) core-shell nanofibers with pH-responsive properties were successfully prepared by coaxial electrospinning, in which PCL and PVA constituted the core and shell, respectively. The nanofibers can be effectively degraded under acidic or neutral condition. Additionally, the as-prepared PCL/PVA fibers can be u...
Article
Fe-doped TiO2 hollow microspheres were prepared by the hydrothermal method and characterized by the X-ray diffraction (XRD), the Scanning Electronic Microscopy (SEM), the Energy Dispersive X-Ray (EDX), the Brunauer-Emmett-Teller (BET), and the UV-visible diffuse-reflectance spectrum (UV-Vis). The as-prepared samples were evaluated for photocatalyt...
Article
The reactivity and catalytic performance of cuprous oxide (Cu 2 O) particles rely on the size and morphology of the Cu 2 O crystals. In this study, a facile and mild hydrothermal route is applied to generate novel uniform cuprous oxide microcrystals, using non-toxic and low-cost carboxylic acids (O,O-type) and amino acids (N,O-type) as structure di...
Article
Thermal oxidation is a simple and cost-effective method that allows the production for large-scale of ZnO microstructures. By modifying the etching conditions (with HNO 3) of the precursor, the morphology of the as-oxidized samples can be controlled, giving way to needle-and cross-linked ZnO microstructures Electron microscopy results revealed that...
Article
Silica-doped tetragonal zirconia nanoparticles (SiO2-ZrO2) catalysts were synthesized with the addition of ZrO2 prior to SiO2 by the microwave-assisted method and compared with a different sequence of ZrO2 and SiO2 (ZrO2-SiO2). The catalysts were characterized by X-ray diffraction, nitrogen adsorption-desorption, transmission electron microscopy, F...
Article
Facile methods for detection of micro voids in the early stages of ductile fracture in structural alloys do not exist. In this work an application of Quantum Dot Luminescence (QDL) for detection of micro-voids from sub-micro-meter levels in an Al-Mg alloy is reported for the first time. The ability of QDL with fluorescence microscopy for extended d...
Book
Full-text available
Design and Futures is a major collection of essays, manifestos, interviews and peer-reviewed articles, edited by Stuart Candy (Carnegie Mellon University) and Cher Potter (Victoria and Albert Museum), documenting 'design futures' discourse and practice around the world. First published as back-to-back volumes in the open access Journal of Futures S...
Article
This article provides a first-hand account of the design, execution, and outcomes of a course in experiential futures, featuring perspectives from the instructor and all 6 students. These reflections are personal and conversational in tone, but are synthesized in the conclusion to draw out more general insights for teachers and practitioners. The m...
Book
Toward a Preemptive Social Enterprise is a manifesto and collection of essays inspiring a new generation of social entrepreneurs and nonprofit leaders to move from a founding principle that is informed by reaction to one that is driven by strategic foresight.
Article
Background: Clinical laboratory tests are now being prescribed and made directly available to consumers through retail outlets in the USA. Concerns with these test have been raised regarding the uncertainty of testing methods used in these venues and a lack of open, scientific validation of the technical accuracy and clinical equivalency of result...
Article
Students share their impressions of and experiences working with science fiction prototyping at the California College of the Arts. The Web extra at http://youtu.be/c4uYbiH72sI is an audio interview in which Science Fiction Prototyping editor Brian David Johnson talks with California College of the Arts student Gregory Stock about his experience wi...
Article
In the middle of the 1980s and 1990s, drug research underwent a significant change. With new knowledge gained from molecular medicine, it became possible to understand the development and course of many diseases in much more detail. As a consequence, truly new therapies were developed on the basis of natural sciences. Progress in medicine is not on...
Article
In der Arzneimittelforschung hat sich Mitte der 1980er- und 1990er-Jahre eine gravierende Wandlung vollzogen. Mit dem Erkenntnisfortschritt der molekularen Medizin wurde es möglich, das Entstehen und Fortschreiten vieler Krankheiten wesentlich tiefer zu durchleuchten, sodass sich ganz neue Therapien auf naturwissenschaftlich rationaler Basis entwic...
Chapter
As advances in genomics and in vitro fertilization unite to bring us such technologies as germline manipulation and in-depth embryo diagnosis, must there be a battle over their use? Policymakers might, after all, acknowledge the arrival of these technologies, accept that people differ in their attitudes toward them, realize that society will adjust...
Article
The objectives of this prospective clinical study were to evaluate the quality of treatment outcomes achieved with a complex orthodontic finishing protocol involving serpentine wires and a tooth positioner, and to compare it with the outcomes of a standard finishing protocol involving archwire bends used to detail the occlusion near the end of acti...
Article
BACKGROUND The majority of women 40–49 years of age need an effective method of contraception because the decline in fertility with age is an insufficient protection against unwanted pregnancy. Although pregnancy is less likely after the age of 40 years, the clinical and social consequences of an unexpected pregnancy are potentially detrimental. No...
Article
Full-text available
In 1997, the Rockefeller Foundation and the Ernst Schering Research Foundation (a subsidiary of Schering AG, Germany, on a non-profit basis) mounted a multi-year global collaborative effort, involving a network of top-level research institutions to intensify research on the regulation of the male reproductive system with special emphasis on post-te...
Article
Extent of Late Quaternary glaciers in the Upper Soča River Region (Southern Julian Alps, SE Europe) has been analyzed using a combination of geological mapping, glaciological modeling, and sediment dating (radiocarbon, U/Th series and Infrared Stimulated Luminescence-IRSL). Field investigations focused mainly on relatively well preserved Quaternary...
Article
The merger of HEW, Veag, Laubag and Bewag to form Vatten-fall Europe meant that administrative and technical upheavals in the optimum use of power stations for producing both electricity and district heat and in streamlining the electricity trading portfolio had to be overcome. It was also possible to restructure the company within a tight time fra...
Article
To support the planning, to optimize the collaboration with the electricity suppliers, and to improve the disposition of energy, the Stadtwerke München has procured the Bofit energy management system. The software puts the supplier in the situation to provide energy in the economically most advantageous way with consideration of all essential preva...
Article
Decentralized power generation systems will be crucial factors in the future optimization of combination systems. A realistic scenario is considered, using the example of an electrical utility with existing centralized generating capacity. Through this example, a distinction is made between unplanned feed-in of electricity and controllable feed-in...
Article
This report addresses the balance of benefits and risks from changes in ovarian and endometrial function from hormonal contraception. The main mode of action of hormonal contraception is inhibition of ovulation, due chiefly to the dose of oestrogen in combined oral contraceptives. With 20 mug dosages of ethinyl oestradiol follicular activity is mor...
Chapter
Our health care system is facing major challenges today and in the years to come — so is the pharmaceutical industry.
Article
End-stage renal disease (ESRD) is one of the most significant complications of systemic lupus erythematosus (SLE). Previous investigators have evaluated the morbidity and mortality of different renal replacement treatment modalities in these patients. Earlier reports have suggested that the systemic manifestations of SLE diminish, or "burn out," on...
Chapter
Drugs such as pinacidil, nicorandil, minoxidil sulphate and cromakalim effect vasodilatation by membrane hyperpolarization of the vascular smooth muscle cells, which in some tissues raises the membrane potential to a value close to the K+ equilibrium potential [35]. Different K+ channels are usually subdivided according to their mode of activation....
Article
K+ channel opening causing membrane hyperpolarization in vascular smooth muscle and thereby vasodilatation, cannot be rated as the ‘newly discovered’ action principle of certain pharmacological substances but as an ubiquitous physiological mechanism for the relaxation in smooth muscle. Acidification of the serum-pH-value is such an effector influen...
Article
The authors studied the effect of lovastatin on five hypercholesterolemic CAPD patients with high risk of atherosclerotic cardiovascular disease. Patients took lovastatin 20 mg once daily for a mean period of 4.5 months. Pre- and post-treatment values of LDL and VLDL totals (325 mg/dl and 292 mg/dl, respectively) and of HDL (42 mg/dl and 43 mg/dl,...
Chapter
Wie in einem früheren Referat ausgeführt (zur Hausen, 1989), ist die Übertragung wissenschaftlicher Ergebnisse in die Klinik und der Einsatz von Laboratoriumsverfahren zur Vorbeugung, Diagnostik und Therapie abhängig von der Beobachtung, Prüfung und Auswertung solcher Erfahrungen, die ihrerseits wieder Rückwirkungen auf die Laboratoriumsarbeit habe...
Article
1) Numerous compounds and changes in physical state functions shift the membrane potential of vascular smooth muscle to more negative values. The consequence is a vasodilatation because Ca2+ channels are closed. K+ channel opening frequently causes the hyperpolarization. 2) Acidification of the blood substitute solution, a fall in O2 partial pressu...
Chapter
A variety of local or systemic influences regulate peripheral organ perfusion, e.g. K+ ions, pH value, noradrenaline, prostacyclin, endothelial factors (1). With the multiplicity of effectors, and since several can be changed at the same time, the question of mechanism arises. To refer to Sherrington (2), it is important to find the “final common p...
Article
A CO2 high-power laser was used for laser-driven boron and phosphorus diffusion in solid phase from silicate glass layers into silicon. This technique allows the formation of shallow (<0.1 μm) and flat profile junctions with a concentration of about 1019 cm-3. SIMS, SEM and spreading resistance methods were used for sample characterization.
Chapter
Eine kürzlich entdeckte Klasse von Verbindungen, die durch Öffnung von K+-Kanälen wirkt, signalisiert eine ganz neue Richtung in der Pharmakologie der lonenkanäle, die sich bis heute fast ausschließlich auf kanalblockende Agenzien beschränkte [1, 8, 11, 13]. Pharmaka wie Pinacidil, Nicorandil, Minoxidilsulfat und BRL 34915 rufen Gefäßerweiterung üb...
Article
The present contribution deals with the electro- and tracerphysiological correlations to vasodilatation observed under prostacyclin or O2 deficiency. Because of the extreme chemical instability of native PGI2, we used iloprost, a stable carbacyclin analogue. At concentrations between 10(-9) and 10(-6) mol/l, iloprost hyperpolarized the resting memb...
Article
In arterial smooth muscle with normal tone or predepolarized and precontracted by noradrenaline, prostacyclin (10(-9) to 10(-6) M) effects a dose-dependent hyperpolarization and relaxation. The hyperpolarization is due to K+ channel opening. In this hyperpolarized portion of the stationary, sigmoid activation curve, vasodilation can be explained by...
Article
In arterial smooth muscle with normal tone or predepolarized and precontracted by noradrenaline, prostacyclin (10(-9) to 10(-6) M) effects a dose-dependent hyperpolarization and relaxation. The hyperpolarization is due to K+ channel opening. In hypoxic vasodilatation, which is likewise induced by membrane hyperpolarization, a share of 20% falls to...
Article
An integrated-optic chip containing two acousto-optic frequency shifters and a TE-pass polariser is presented. All the elements needed for a fibre-optic gyroscope using the frequency-shift method are realised on one LiNbO<sub>3</sub> chip
Conference Paper
TM losses up to 55 dB at λ=633 nm and λ=780 nm were obtained with integrated optical polarizers. The samples had various metal claddings (Au, Al, or Ti) using continuous and multi-section electrode masks, respectively
Article
TE-pass polarisers with MgO buffer layer and various metal claddings (Al, Au and Ti) have been realised. For λ=780 nm the samples showed an extinction ratio up to 55 dB and a TM attenuation of 250 dB/cm using Al cladding
Article
An integrated-optical device is presented which performs absorption of both polarisations. Measurements show relative insertion losses of up to 50 (95) dB/cm for TE (TM) polarisation at ¿ = 780 nm for Y-cut Ti :LiNbO3, using Ti as metal cladding.
Chapter
Prostacyclin (PGI2), the main but unstable metabolite of arachidonic acid in vascular tissue, has potent cardiocirculatory properties [4, 8, 16]. Besides being the most effective platelet anti-aggregating substance, PGI2 has been reported to relax a variety of vascular preparations [4, 5, 10,15, 17], to reduce myogenic activity [10], and to inhibit...
Article
A pilot test of microemulsion flooding was conducted in a single five-spot pattern in the Chateaurenard field in France. The test had to accommodate a 40-mPa·s (40-cp) oil viscosity and a regional pressure gradient across the pattern. A very clear oil bank was observed, resulting in a substantial increase in oil production. Introduction Société Na...
Article
The microemulsion/polymer flooding pilot project described is operated by Elf Aquitaine in the Chateaurenard Field, located in the Paris Basin. The reservoir contains a relatively viscous (40 cp) paraffinic oil. The microemulsion slug was formulated and sized using bench tests and linear core flood, and its performance was confirmed in a 2-m x 2-m...
Article
Typescript. Thesis (Ph.D.)--University of California, Santa Cruz, 2004. Includes bibliographical references (p.228-245) Photocopy.

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