Investigation of the enzymatic characteristics of thermotolerant xylanase McXyn0243 derived from Malbranchea cinnamomea, and its application in the degradation of three agricultural residues for the production of xylooligosaccharides.

Malbranchea cinnamomea produces enzymes essential for degrading lignocellulosic materials, converting agricultural waste into high-value compounds like xylooligosaccharides (XOSs). In this study, we cloned and expressed an endo-1,4-β-xylanase, McXyn0243, from M. cinnamomea and investigated its enzymatic properties and application in agricultural wastes degradation.

Characterization and Mechanism Study of a Novel Ethanol Acetyltransferase from (EatH) with Good Thermostability, pH Stability, and Broad Alcohol Substrate Specificity.

Ethyl acetate, one of the most essential industrial compounds, has a broad range of applications, including flavors, fragrances, pharmaceuticals, cosmetics, and green solvents. Eat1 is accountable for bulk ethyl acetate production in yeasts, yet its properties and molecular mechanism are not well characterized. In this study, an gene from was obtained through gene mining.

Identification of Yeast Strain YA176 for Bio-Purification of Soy Molasses to Produce Raffinose Family Oligosaccharides and Optimization of Fermentation Conditions.

Soybean molasses, which contains high levels of raffinose family oligosaccharides (RFOs) such as stachyose and raffinose, is subjected to a process of bio-purification to remove sucrose while maintaining the RFOs, consequently increasing its value. This study employed morphological observation, physiological and biochemical studies, and molecular biology techniques to identify YA176, a yeast strain renowned for its effective bio-purification of soy molasses. Through single-factor and orthogonal experiments, optimal bio-purification conditions were established.

Screening of a Strain with High 3-Methylthio-1-Propanol Yield and Optimization of Its Fermentation Conditions.

3-Methylthio-1-propanol (3-Met) is an important flavor compound in various alcoholic beverages such as and . To maintain the content of 3-Met in these alcoholic beverages, it is necessary to screen a micro-organism with high yield of 3-Met from the brewing environment. In this study, the ability of yeast strains from the brewing to produce 3-Met was analyzed, aiming to obtain yeast with high-yield 3-Met, and its fermentation conditions were optimized.

Screening, Identification, and Fermentation Condition Optimization of a High-Yield 3-Methylthiopropanol Yeast and Its Aroma-Producing Characteristics.

A high-yield 3-methylthiopropanol (3-Met) yeast Y1402 was obtained from sesame-flavored Daqu, and it was identified as . Y1402 showed a broad range of growth temperatures and pH, as well as the maximum tolerance to glucose, NaCl, nicotine, and 3-Met at 50% (/), 15% (/), 1.2 g/L, and 18 g/L, respectively.

Silicon-based high-power traveling wave photodetector with inductive gain peaking.

We demonstrate Ge/Si high-power and high-speed distributed traveling wave photodetectors (TWPD) by using the inductive gain peaking technique. Input terminals of TW electrodes are open to enhance RF output efficiencies to output loads. Furthermore, optimized on-chip spiral inductors are incorporated at output terminals of TW electrodes to alleviate bandwidth degradations caused by the absences of matching impedances.

High linearity silicon DC Kerr modulator enhanced by slow light for 112 Gbit/s PAM4 over 2 km single mode fiber transmission.

We demonstrate a high efficiency, high linearity and high-speed silicon Mach-Zehnder modulator based on the DC Kerr effect enhanced by slow light. The two modulation arms based on 500-µm-long grating waveguides are embedded with PN and PIN junctions, respectively. A comprehensive comparison between the two modulation arms reveals that insertion loss, bandwidth and modulation linearity are improved significantly after employing the DC Kerr effect.

BJN0001, a potentially new species isolated from the cellar mud of Chinese strong-flavor baijiu, produces ethanol, acetic acid and butyric acid from glucose.

Unlabelled: A novel strain, designated BJN0001, was isolated from the cellar mud of Chinese strong-flavor baijiu. The complete genome of strain BJN0001 was 2,688,791 bp and annotated with 2610 genes. Whole-genome similarity metrics such as average nucleotide identity (ANI) of BJN0001 with reference genomes reveals clear species boundaries of < 95% ANI value for species.

Ultra-compact silicon mode (de)multiplexer based on directional couplers with subwavelength sidewall corrugations.

Asymmetrical directional couplers aided with subwavelength sidewall corrugations are used to realize ultra-compact silicon mode (de)multiplexers at C-band. Three mode (de)multiplexers with ultra-short coupling lengths of 5.6/6.

Biochemical characterization of a novel feruloyl esterase from B1213 and its application for hydrolyzing wheat bran.

Unlabelled: In this study, a novel feruloyl esterase (BpFae) from B1213 was purified, biochemically characterized, and applied in releasing ferulic acid from wheat bran. The molecular mass of BpFae was approximately 60 kDa by SDS-PAGE, and the enzyme was a homomultimer in solution. BpFae displayed maximum activity at pH 4.

Correlation between microbial communities and flavor compounds during the fifth and sixth rounds of sauce-flavor baijiu fermentation.

Sauce-flavor baijiu is a representative of Chinese traditional fermented baijiu using grains as the raw materials through the co-fermentation of microorganisms. The whole manufacturing process includes 7 times of distillation and generates 7 kinds of base baijius. The final product is a mixture of the 7 kinds of base baijius.

Polarization-independent fiber-chip grating couplers optimized by the adaptive genetic algorithm.

One-dimensional polarization-independent grating couplers are demonstrated with the aid of the adaptive genetic algorithm optimization. By adjusting the relative weight between the coupling efficiency and the bandwidth of the polarization-dependent loss (PDL), we control the evolution direction and customize the final performance of the device. Two specific designs are generated by giving more weight to the coupling efficiency and the PDL bandwidth, respectively.

Application of in Simulated Solid-State Fermentation for Production: Changes of Microbial Community Structure and Flavor Metabolism.

is conducive to the synthesis of ester compounds in brewing the Chinese liquor ; esters are crucial for the quality of . In this study, simulated solid-state fermentation for production was used to explore whether artificial addition of could improve the flavor substance in , and the underlying mechanisms. Two experimental groups were studied, in which Y3604 (Group A) and YF1503 (Group B) were added, respectively; in the control group (Group C), no was added.

Optimized soluble expression of a novel endoglucanase from in .

B1213, a novel microbe isolated from a -producing environment, displayed strong cellulolytic activity on agar plates with glucan as the carbon source and had an activity of 674.5 U/mL after culturing with barley. Genome annotation of identificated a single endoglucanase (EG)-encoding gene, designated as .

High linearity silicon modulator capable of actively compensating input distortion.

In this Letter, we demonstrate an ultra-high linearity silicon carrier-depletion-based modulator by integrating a dual-parallel Mach-Zehnder modulator (DP-MZM) with a 1×2 thermo-optical switch. The operation principle is to manipulate power distributions of RF and optical signals among the two sub-MZMs, so their third-order nonlinearities can cancel each other. Spurious-free dynamic ranges (SFDRs) for the third-order intermodulation distortion (IMD3) are measured to be 123/120⋅ at 1/10 GHz, which represents a record-high linearity achieved with silicon-based modulators.

Screening of yeasts isolated from environments for 2-phenylethanol production and optimization of production conditions.

2-Phenylethanol (2-PE) with a pleasant rose-like odor is a valuable aroma compound used in many fields. 2-PE production by yeast is considered a promising alternative to chemical synthesis and extraction from natural materials. In this report, the strain YF1702 produced a significantly higher level of 2-PE when compared with other strains isolated from -producing environments.

Hitless and gridless reconfigurable optical add drop (de)multiplexer based on looped waveguide sidewall Bragg gratings on silicon.

Reconfigurable optical add-drop filters in future intelligent and software controllable wavelength division multiplexing networks should support hitless wavelength switching and gridless bandwidth tuning. The hitless switching implies that the central wavelength of one channel can be shifted without disturbing data transmissions of other channels, while the gridless tuning means that the filter bandwidth can be adjusted continuously. Despite a lot of efforts, very few integrated optical filters simultaneously support the hitless switching of central wavelength and the gridless tuning of bandwidth.

Optimization of fermentation conditions for the production of recombinant feruloyl esterase from B1213.

Statistical experimental designs were used to optimize conditions for recombinant feruloyl esterase (BpFae) production in bacteria under lactose induction. After optimization by single factor design, Plackett-Burman design, steepest ascent design and the response surface method, the optimal conditions for BpFae production were: 6 g/L lactose, pH 5.5, pre-induced period 5 h, 23 °C, shaker rotational speed of 240 rpm, medium volume of 50 mL/250 mL, inoculum size 0.

Effects of aging on the quality of roasted sesame-like flavor Daqu.

Background: Daqu, the saccharification, fermentation, and aroma-producing agents for Baijiu brewing, is prepared using a complex process. Aging is important for improving the quality of Daqu, but its impact has rarely been studied. This study investigated changes in the physicochemical properties, flavor compounds, and microbial communities during aging of Daqu with a roasted sesame-like flavor.

High-performance silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm.

Graphene has attracted much attention for the realization of high-speed photodetection for silicon photonics over a wide wavelength range. However, the reported fast graphene photodetectors mainly operate in the 1.55 μm wavelength band.

Effects of fortification of Daqu with various yeasts on microbial community structure and flavor metabolism.

Fortification of Daqu with isolated functional strains can influence the metabolic activity of the microbial community, and thus alter the flavors of the Baijiu produced with Daqu as a fermentation starter. Here, we analyzed the microbial community dynamics of, and volatile compound production by, Daqu fortified respectively with three high-yield ethyl caproate-producing yeasts (Saccharomyces cerevisiae Y7#09, Hyphopichia burtonii F12507 and Clavispora lusitaniae YX3307), or with a mixture of these three strains, during the fermentation of Baijiu. The microbial community was investigated using Illumina HiSeq technology.

Silicon dual-series Mach-Zehnder modulator with high linearity.

In this Letter, we demonstrate a highly linear silicon modulator based on the dual-series Mach-Zehnder modulator (MZM) architecture. The two sub-MZMs are biased at quadrature points of opposite polarities. A proper power-splitting ratio of the driving RF signal on the two sub-MZMs enables the suppression of the third order intermodulation distortion (IMD3).

High-power traveling-wave photodetector based on an aperiodically loaded open-circuit electrode.

We demonstrate a four-stage silicon distributed traveling-wave photodetector (TWPD) whose input terminal is open-circuit so as to enhance the radio-frequency (RF) output power. In order to mitigate the bandwidth drop caused by the RF reflection at the open input terminal, photodetector (PD) units are aperiodically loaded on the TW electrode. With the aid of an equivalent circuit model, we optimize spacings between PD units and then improve the 3 dB bandwidth from 7 to 10 GHz.