gebhart/patrepeval huggingface dataset:
BUTANOL PRODUCTION FROM GLYCEROL BY Clostridium pasteurianum IN DEFINED CULTURE MEDIA- A PHENOTYPIC APPROACH. (2009)

Title of Document: BUTANOL PRODUCTION FROM GLYCEROL BY Clostridium pasteurianum IN DEFINED CULTURE MEDIAA PHENOTYPIC APPROACH. David Leonardo Ramos Sanchez, Master of Science, 2009 Directed By: Associate Professor Nam Sun Wang Department of Chemical and Biomolecular Engineering ABSTRACT The fluctuations in oil prices have stimulated the production of renewable biofuels, in particular the production of bioethanol and biodiesel. The production of biodiesel has expanded almost six fold in the past years. The ten wt% of the biodiesel process results in crude glycerol. Once a valuable product, nowadays glycerol is considered a waste and a surplus material. Its current low price makes it an attractive substrate for a fermentation process. Molecular genetics have unveiled new insights about solvent production in Clostridia. It has been recognized that endospore development and solvent formation share a regulatory mechanism. The solvent production, particularly the butanol fermentation of glycerol by Clostridium pasteurianum was studied. Taking advantage of the characteristics of the sporulation phenotype, the study of the butanol fermentationThe fluctuations in oil prices have stimulated the production of renewable biofuels, in particular the production of bioethanol and biodiesel. The production of biodiesel has expanded almost six fold in the past years. The ten wt% of the biodiesel process results in crude glycerol. Once a valuable product, nowadays glycerol is considered a waste and a surplus material. Its current low price makes it an attractive substrate for a fermentation process. Molecular genetics have unveiled new insights about solvent production in Clostridia. It has been recognized that endospore development and solvent formation share a regulatory mechanism. The solvent production, particularly the butanol fermentation of glycerol by Clostridium pasteurianum was studied. Taking advantage of the characteristics of the sporulation phenotype, the study of the butanol fermentation was approached. A relation between spore formation and butanol production was found in C. pasteurianum by applying molecular genetics concepts.
Louisiana Oncologist Describes Working through Hurricane Katrina (2005)

DALLAS—Originally scheduled for New Orleans, the Southwest Oncology Group's Annual Fall Meeting was moved to Texas only at the last moment when Hurricane Katrina's route through Louisiana was certain. So it was fitting in a way that a Louisiana State University (LSU) oncologist was invited to speak at the meeting, to try to convey a sense of the enormity of the damage to the city's medical institutions.Figure: Jill Gilbert, MD, principal investigator of SWOG trials at LSU-New Orleans: “When Katrina is no longer in the headlines in your newspapers, [let it] remain a headline in your mind. More than ever we need help from established institutions to reinstitute a health care system that has taken a terrible blow.”Jill Gilbert, MD, Assistant Professor at the LSU Health Sciences Center's Division of Hematology and Oncology and principal investigator of the National Cancer Institute's Minority-Based Community Clinical Oncology Program there, said this was the first time in 300 years that Orleans Parish had zero bed hospital capacity. “The entire [medical center] area was ground zero for Hurricane Katrina,” Dr. Gilbert said. “It was an unbelievable sight.” She illustrated her talk with photographs taken after the worst of the flooding. As those waters receded, New Orleans hospitals and care providers began facing the challenge of treating an already vulnerable population. “The city's statistics were sobering even before the hurricane, with 28 percent of people living at or below the poverty level,” she said.Figure: Dr. Jill Gilbert spoke at the SWOG meeting about working in a M*A*S*H-style emergency and chronic care medical unit on the LSU-Baton Rouge campus following Hurricane Katrina. Among the many photos she showed, all taken by Vince Cataldo, MD, LSU Chief Medical Resident, were these: (1) Outside Charity Hospital: The Medical Center of Louisiana is composed of the University and Charity Hospitals, approximately two blocks from each other. (2) Flood waters in the medical district: On the left is the parking building adjacent to Charity Hospital, on the right the VA Hospital. (3) Floodwaters two days after the hurricane around the LSU Outpatient Clinic building on the right and the Medical Library on the left, next to University Hospital. (4) The LSU School of Nursing.Dr. Gilbert urged the oncology community to keep New Orleans in their minds. “When Katrina is no longer in the headlines in your newspapers, [let it] remain a headline in your mind,” she said. “More than ever we need help from established institutions to reinstitute a health care system that has taken a terrible blow.”
Kdm6a overexpression improves the development of cloned mouse embryos (2017)

Somatic cell nuclear transfer (SCNT) is an important technique for life science research. However, most SCNT embryos fail to develop to term due to undefined reprogramming defects. Here, we show that abnormal Xi occurs in somatic cell NT blastocysts, whereas in female blastocysts derived from cumulus cell nuclear transfer, both X chromosomes were inactive. H3K27me3 removal by Kdm6a mRNA overexpression could significantly improve preimplantation development of NT embryos, and even reached a 70.2% blastocyst rate of cleaved embryos compared with the 38.5% rate of the control. H3K27me3 levels were significantly reduced in blastomeres from cloned blastocysts after overexpression of Kdm6a. qPCR indicated that rDNA transcription increased in both NT embryos and 293T cells after overexpression of Kdm6a. Our findings demonstrate that overexpression of Kdm6a improved the development of cloned mouse embryos by reducing H3K27me3 and increasing rDNA transcription.
In situ deformation of thin films on substrates (2009)

Metallic thin-film plasticity has been widely studied by using the difference between the coefficients of thermal expansion of the film and the underlying substrate to induce stress. This approach is commonly known as the wafer curvature technique, based on the Stoney equation, which has shown that thinner films have higher yield stresses. The linear increase of the film strength as a function of the reciprocal film thickness, down to a couple hundred nanometers, has been rationalized in terms of threading and interfacial dislocations. Polycrystalline films also show this kind of dependence when the grain size is larger than or comparable to the film thickness. In situ TEM performed on plan-view or cross-section specimens faithfully reproduces the stress state and the small strain levels seen by the metallic film during wafer curvature experiments and simultaneously follows the change in its microstructure. Although plan-view experiments are restricted to thinner films, cross-sectional samples where the film is reduced to a strip (or nanowire) on its substrate are a more versatile configuration. In situ thermal cycling experiments revealed that the dislocation/interface interaction could be either attractive or repulsive depending on the interfacial structure. Incoherent interfaces clearly act as dislocation sinks, resulting in a dislocation density drop during thermal cycles. In dislocation-depleted films (initially thin or annealed), grain boundaries can compensate for the absence of dislocations by either shearing the film similarly to threading dislocations or through fast diffusion processes. Conversely, dislocations are confined inside the film by image forces in the cases of epitaxial interfaces on hard substrates. To increase the amount of strain seen by a film, and to decouple the effects of stress and temperature, compliant substrates can also be used as support for the metallic film. The composite can be stretched at a given temperature using heating/cooling straining holders. Other in situ TEM methods that served to reveal scaling effects are also reviewed. Finally, an alternate method, based on a novel bending holder that can stretch metallic films on rigid substrates, is presented.
Polar modulators for 1 and 2 GHz power amplifier correction (2002)

Modern RF power amplifiers face increasingly stringent demands on their distortion, cost and power consumption. The use of correction techniques can help, and many of these techniques require polar modulators. Polar modulators are described which operate at 1 GHz and 2 GHz, and allow 20 dB of magnitude variation and 360 deg of phase variation. Shutdown and phase swapping controls are also described. OIP3s are +20 dBm at 1 GHz and +17 dBm at 2 GHz, and group delays are below 2 ns. The parts are implemented in a 65 GHz f/sub T/ SiGe bipolar process.
Characterization of polymer thin films with small‐angle X‐ray scattering under grazing incidence (GISAXS) (2002)

(2002). Characterization of polymer thin films with small‐angle X‐ray scattering under grazing incidence (GISAXS) Synchrotron Radiation News: Vol. 15, No. 5, pp. 35-42.
A data-driven neuromuscular model of walking and its application to prosthesis control (2013)

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2013.
Electron Spin Echo Envelope Modulation (ESEEM) Spectroscopy (2024)

The first volume devoted entirely to Electron Spin Echo Envelope Modulation (ESEEM) SpectroscopyThis valuable book provides an introduction and broad survey of topics in ESEEM spectroscopy, including the theory, instrumentation, peculiarities of ESE experiments, and analysis of experimental data with particular emphasis on orientationally disordered systems. Applications of ESEEM spectroscopy to study chemically and biologically important paramagnetic centers in single crystals, amorphous solids, and powders are discussed as well. Electron Spin Echo Envelope Modulation (ESEEM) Spectroscopy will benefit specialists in magnetic resonance spectroscopy, physicists, chemists, and biologists who use magnetic resonance in their research.
Management of esophageal anomalies. (1965)

Esophageal anomalies continue to present a challenge to the pediatrician, the surgeon, and the nursing staff. The rocky road to recovery is fought with a multitude of life-threatening complications demanding immediate attention and requiring all of the services of a specialized institution designed and equipped for the care of infants. In our series, for the past seven years, we can report a 100% recovery following surgical correction of the anomaly for 37 consecutive infants with a birth weight greater than 2,000 gm. One additional infant died before the anomaly could be corrected. Therefore, 97% of all infants admitted with a weight of over 2,000 gm have survived. For those with a birth weight of less than 2,000 gm, the outlook is most dismal, with only 2 survivors out of 11 infants. An emergency gastrostomy was performed with local anesthesia on each infant as soon as the diagnosis was confirmed. The definitive operation was then delayed for from 3 to 21 days for treatment of pneumonia, hyperbilirubinemia, or other anomalies of a more urgent nature. The over-all recovery rate for the last seven years has been 80% for 49 infants.
Data gathering in wireless sensor networks with mobile collectors (2008)

In this paper, we propose a new data gathering mechanism for large scale wireless sensor networks by introducing mobility into the network. A mobile data collector, or for convenience called M-collector in this paper, could be a mobile robot or a vehicle equipped with a powerful transceiver and battery, works like a mobile base station and gathers data while moving through the field. An M-collector starts the data gathering tour periodically from the static data sink, polls each sensor while traversing the transmission range of the sensor, then collects data directly from the sensor without relay (i.e., in a single hop), finally returns and uploads data to the data sink. Since data packets are gathered directly without relay and collision, the lifetime of sensors is expected to be prolonged, and sensors can be made very simple and inexpensive. We focus on the problem of minimizing the length of each data gathering tour and refer to this problem as the single-hop data gathering problem, or SHDGP for short. We first formalize the SHDGP problem into a mixed integer program and prove its NP-hardness. We then present a heuristic tour-planning algorithm for a single M-collector. For the applications with a strict distance/time constraint for each data gathering tour, we also utilize multiple M-collectors to traverse through several shorter sub-tours concurrently to satisfy the distance/time constraint. Our single-hop data gathering scheme will improve the scalability and solve intrinsic problems of large scale homogeneous networks, and can be used in both connected networks and disconnected networks. The simulation results demonstrate that the new data gathering algorithm can greatly reduce the moving distance of the collectors compared to the covering line approximation algorithm, and is close to the optimal algorithm in small networks. In addition, the proposed data gathering scheme can prolong the network lifetime significantly compared to a network which has only a static data collector, or a network in which the mobile collector can only move along straight lines.
Polynomial methods for allocating complex components (1999)

Methods for performing component matching by expressing an arithmetic specification and a bit-level description of an implementation as word-level polynomials have been demonstrated for combinational circuits. This representation allows the functionality of a specification and existing implementation to be compared. We present extensions to this basic method that allow polynomial models to be constructed for circuits that employ sequential elements as well as feedback. Furthermore, we derive a means of approximating the functionality of non polynomial functions and determining a bound on the error of this approximation. These methods are used to synthesize an Infinite Impulse Response filter from a library of potential implementations.
Ion beam deposition and structural characterization of GMR spin valves (1997)

NiO exchange-biased "bottom" spin valves of the type NiO/NiFe/Co/Cu/Co/NiFe and FeMn exchange-biased "top" spin valves of the type NiFe/Co/Cu/Co/NiFe/FeMn were deposited by ion-beam deposition (except the NiO layer). Their magnetic properties, magneto-transport, and microstructures are characterized and compared with corresponding GMR spin valves deposited by dc magnetron sputtering. High-resolution cross-sectional transmission electron microscopy and X-ray diffraction reveal microstructural differences between ion-beam-deposited and dc magnetron sputtered spin valves. In particular, film texture, surface morphology, GMR ratio, exchange bias, interlayer coupling strength, and coercivity vary widely, but property-structure-processing correlation can be identified. A GMR ratio of /spl sim/9.7% was obtained on random textured NiO exchange-biased bottom spin valves by ion-beam deposition.
Investigating the interrelatedness of clinical and non-clinical parameters affecting outcomes in COVID-19 patients: a retrospective study (2022)

The COVID-19 pandemic has affected millions globally. Several studies have been carried out to uncover factors affecting the severity of the resulting infection. Available location-specific data concerning the affective demographics as well as clinical aspect of the disease remains limited. In this study, a number of non-clinical as well as the clinical parameters were investigated for their role in adverse progression of the disease in patients admitted to intensive care unit (ICU) in a private tertiary hospital in Peshawar. The prevalence of comorbidities hypertension and diabetes as well as mortality was higher in age group of 70-79 years. Dyspnea was significantly linked to sepsis, invasive ventilation, and mortality; its late presentation, i.e. 15 to 20 days was significantly associated with mortality (p-value < 0.02). Acute kidney injury and acute respiratory distress syndrome were found to be the most strongly associated with sepsis and septic shock. Neither remdesivir nor tocilizumab was effective in preventing the infection-related complications, invasive ventilation, and mortality. Overall, dyspnea was found to be an indicator of the worst progression of the disease. Furthermore, while some parameters were closely linked, others were not.
Development of linseed oil based polyesteramide without organic solvent at lower temperature (2007)

Abstract Linseed oil based polyesteramide was synthesized at lower temperature in the absence of organic solvent through condensation polymerization reaction [Sf‐LPEA]. In this reaction N , N ‐bis(2‐hydroxyethyl) linseed oil fatty amide and phthalic anhydride were heated at temperature lower than their onset of melting points and the by‐product, such as water was removed by application of vacuum technique. This approach was employed to overcome the use of volatile organic solvents used during processing and application of resin, which are ecologically harmful. The solubility of Sf‐LPEA was checked in different polar and nonpolar solvents. The FTIR, 1 H NMR, and 13 C NMR spectral techniques were used to confirm the structure of Sf‐LPEA. The physicochemical, physicomechanical, and chemical resistance properties of the resin were investigated by standard methods. DSC and TGA were used to determine, respectively, the curing behavior and thermal stability of the resin. The comparative study of these properties of Sf‐LPEA with reported polyesteramide [LPEA], which are normally synthesized at higher temperature in organic solvent, was done. It was found that Sf‐LPEA exhibited improved physicomechanical, chemical resistance properties, and higher thermal stability compared with LPEA, and hence can find application as corrosion protective coating. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1143–1148, 2007
Fortgeschrittene Programmiertechniken (1997)

In der Programmiersprache C müssen die Variablen grundsätzlich „vereinbart“ werden (vgl. Abschnitt 3.16). Eine „implizite Vereinbarung“ wie z. B. in Fortran ist nicht vorgesehen. Bei der Verwendung des deutschen Wortes „Vereinbarung“ wird nicht deutlich, daß genau zwischen „Definition“ und „Deklaration“ unterschieden werden muß: Bei der einer Variablen wird ein Typ vereinbart, und der dafür erforderliche wird bereitgestellt (das „Objekt wird erzeugt“), einen Wert braucht die Variable dabei nicht zu bekommen. Bei einer werden festgelegt (wie z. B. bei den Parametern im Kopf einer Funktions-Definition). Analog dazu werden die beiden Begriffe auch für Funktionen verwendet, die definiert werden müssen (das Funktionsprogramm wird mit allen Anweisungen geschrieben, „das Objekt wird erzeugt“) und deklariert werden können (als Prototypen).
Electropolishing of Platinum Foils at −35°C for Transmission Electron Microscopy (1967)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation C. T. J. Ahlers, R. W. Balluffi; Electropolishing of Platinum Foils at −35°C for Transmission Electron Microscopy. J. Appl. Phys. 1 February 1967; 38 (2): 910–911. https://doi.org/10.1063/1.1709456 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioJournal of Applied Physics Search Advanced Search |Citation Search
Overexpression of Metallothionein Reduces Diabetic Cardiomyopathy (2002)

Many diabetic patients suffer from cardiomyopathy, even in the absence of vascular disease. This diabetic cardiomyopathy predisposes patients to heart failure and mortality from myocardial infarction. Evidence from animal models suggests that reactive oxygen species play an important role in the development of diabetic cardiomyopathy. Our laboratory previously developed a transgenic mouse model with targeted overexpression of the antioxidant protein metallothionein (MT) in the heart. In this study we used MT-transgenic mice to test whether an antioxidant protein can reduce cardiomyopathy in the OVE26 transgenic model of diabetes. OVE26 diabetic mice exhibited cardiomyopathy characterized by significantly altered mRNA expression, clear morphological abnormalities, and reduced contractility under ischemic conditions. Diabetic hearts appeared to be under oxidative stress because they had significantly elevated oxidized glutathione (GSSG). Diabetic mice with elevated cardiac MT (called OVE26MT mice) were obtained by crossing OVE26 transgenic mice with MT transgenic mice. Hyperglycemia in OVE26MT mice was indistinguishable from hyperglycemia in OVE26 mice. Despite this, the MT transgene significantly reduced cardiomyopathy in diabetic mice: OVE26MT hearts showed more normal levels of mRNA and GSSG. Typically, OVE26MT hearts were found to be morphologically normal, and elevated MT improved the impaired ischemic contractility seen in diabetic hearts. These results demonstrate that cardiomyocyte-specific expression of an antioxidant protein reduces damage to the diabetic heart.
Scalable network-based buffer overflow attack detection (2006)

Buffer overflow attack is the main attack method that most if not all existing malicious worms use to propagate themselves from machine to machine. Although a great deal of research has been invested in defense mechanisms against buffer overflow attack, most of them require modifications to the network applications and/or the platforms that host them. Being an extension work of CTCP, this paper presents a network-based low performance overhead buffer overflow attack detection system called Nebula 1 NEtwork-based BUffer overfLow Attack detection, which can detect both known and zero-day buffer overflow attacks based solely on the packets observed without requiring any modifications to the end hosts. Moreover, instead of deriving a specific signature for each individual buffer overflow attack instance, Nebula uses a generalized signature that can capture all known variants of buffer overflow attacks while reducing the number of false positives to a negligible level. In addition, Nebula is built on a centralized TCP/IP architecture that effectively defeats all existing NIDS evasion techniques. Finally, Nebula incorporates a payload type identification mechanism that reduces further the false positive rate and scales the proposed buffer overflow attack detection scheme to gigabit network links.
CHEMICAL COMPOSITION OF THE PEPPER FRUIT EXTRACTS OF HOT CULTIVARS Capsicum annuum L. (2011)

Hot pepper fruits contain the chemical group of alkaloid compounds called capsaicinoids, which are responsible for the pungency of the Capsicum species. The aim of our study was to determine the chemical composition as well as the content of capsaicinoids in pepper fruits (Capsicum annuum L.) cultivars ‘Adorno’ and ‘Etna’, which were grown in the north-western Poland in 2009. Capsaicinoids were extracted from dry pepper fruits by solvents (acetone and hexane) and analyzed by GC/MS. The analysis revealed that the major components of the extracts are capsaicin, dihydrocapsaicin and nonivamide (pelargonic acid vanillylamide).
Trap-depth measurements using ultracold collisions (1996)

We measure the depth of an optical atom trap using repulsive trap-loss collisions. These collisions involve excitation by a laser tuned to a frequency above the atomic resonance. Simple conservation of energy considerations give direct quantitative measurements of the trap depth. Further analysis allows measurement of the escape probability as a function of energy. We apply the methods to Rb traps, and use the results to form conclusions about ground-state hyperfine-changing collisions.