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Acidithiobacillus caldus is one of the dominant sulfur-oxidizing bacteria in bioleaching reactors. It plays the essential role in maintaining the high acidity and oxidation of reduced inorganic sulfur compounds during bioleaching process. In this report, the complete genome sequence of A. caldus SM-1 is presented. The genome is composed of one chromosome(More)
In this study, a recently sequenced 9.8-kb plasmid, pLAtc1, from Acidithiobacillus caldus strain SM-1 was characterized and developed into an expression vector. The pLAtc1 backbone carried an oriV, three rep genes, five mob genes, a Nic site, and an addiction system. Multilocus sequence analysis indicated that pLAtc1 was phylogenetically more related to the(More)
A novel pyrene-degrading, Gram-negative bacterium, designated strain P-4(T), was isolated from a polycyclic aromatic hydrocarbon-degrading enrichment of polluted soils from a coking chemical plant. Cells of strain P-4(T) were non-motile rods. Strain P-4(T) grew at 15-45 °C (optimum, 37 °C), pH 6.0-10.0 (optimum, pH 8.5) and 0-4 % (w/v) NaCl. Analysis of the(More)
OBJECTIVES To evaluate the clinical response and adverse effects of Photofrin photodynamic therapy (PDT) in patients with relapse nasal pharyngeal cancer. METHODS Thirty patients with relapse nasal pharyngeal cancer were randomly divided into PDT group and chemotherapy group. In PDT group, patients received intravenous administration of Photofrin (2mg/kg(More)
OBJECTIVE To evaluate the clinical efficacy and adverse effects of Photofrin photodynamic therapy (PDT) in patients with advanced cancers. METHODS Forty patients with advanced cancers in stage IV with lumen obstruction, who failed to respond positively to other treatment regimens, received intravenous administration of Photofrin as the photosensitizer at(More)
We propose and demonstrate a method to generate ultrawideband (UWB) signals in the optical domain based on the chaotic dynamics of an optically injected semiconductor laser with optical feedback. The chaotic-UWB pulses with a fractional bandwidth of 116% and central frequency of 6.88 GHz are experimentally generated by controlling the injection strength and(More)
We propose and theoretically demonstrate an all-optical method for directly generating all-optical random numbers from pulse amplitude chaos produced by a mode-locked fiber ring laser. Under an appropriate pump intensity, the mode-locked laser can experience a quasi-periodic route to chaos. Such a chaos consists of a stream of pulses with a fixed repetition(More)
We propose and demonstrate an approach to the generation of an ultrawideband (UWB) pulse utilizing the nonlinear dynamics of a semiconductor laser (SL). The output UWB chaotic optical pulses generated by the SL with optical feedback can be controlled when the feedback strength and driving current of the SL are tuned. Our experiment proves that the spectrum(More)
OBJECTIVE To explore the possibility of evaluating the short-term therapeulic effect of radiofrequency ablation (RFA) in cancer treatment by positron emission tomography. METHODS The radioactivity intensity of the tumor was detected by PET before and after RFA. RESULTS Radioactivity blank was observed in all 33 cases with 54 lesions, indicating the(More)
A UWB microwave-photonic chaotic radar system for remote ranging is proposed and demonstrated. The chaotic detection signal is transmitted by an ultra-wideband transmitting antenna after a 24 km single-mode fiber transmission to a remote antenna unit. The received signal is converted into the corresponding optical signal through directly modulating and(More)