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Use of dry yeast cells as a cheap nitrogen source for lactic acid production by thermophilic

Kim Yng Ooi, Jin Chuan Wu

《化学科学与工程前沿（英文）》 2015年 第9卷 第3期   页码 381-385 doi: 10.1007/s11705-015-1534-2

摘要： Dry yeast cells (DYC) were used as a cheap nitrogen source to replace expensive yeast extract (YE) for L-lactic acid production by thermophilic . Cassava starch (200 g·L ) was converted to L-lactic acid by simultaneous saccharification and fermentation using WCP10-4 at 50 °C in the presence of 20 g·L of DYC, giving 148.1 g·L of L-lactic acid at 27 h with a productivity of 5.5 g·L ·h and a yield of 92%. In contrast, 154.4 g·L of lactic acid was produced at 24 h with a productivity of 6.4 g·L ·h and a yield of 96% when equal amount of YE was used under the same conditions. Use of pre-autolyzed DYC at 50 °C for overnight slightly improved the lactic acid titer (154.5 g·L ) and productivity (7.7 g·L ·h ) but gave the same yield (96%).

关键词： L-lactic acid     thermophilic strain     Bacillus coagulans     dry yeast cells     autolysis     fermentation    

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Roles of acid-producing bacteria in anaerobic digestion of waste activated sludge

Sijia Ai, Hongyu Liu, Mengjie Wu, Guangming Zeng, Chunping Yang

《环境科学与工程前沿（英文）》 2018年 第12卷 第6期 doi: 10.1007/s11783-018-1050-y

摘要：

Three acid-producing strains were isolated and identified.

The isolated bacteria accelerated the anaerobic digestion processes.

Bacillus coagulans improved TCOD removal, VS removal and biogas production.

The optimal inoculum concentration of Bacillus coagulans AFB-1 was 30%.

关键词： Anaerobic digestion     Waste activated sludge     Acid-producing bacteria     Bacillus coagulans    

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A meta-analysis of randomized trials of maintenance bacillus Calmette-Guerin instillation efficacy against

PAN Jiangang, ZHOU Xing, CHEN Zhiguang, HAN Ruifa

《医学前沿（英文）》 2008年 第2卷 第3期   页码 259-263 doi: 10.1007/s11684-008-0049-3

摘要： Meta-analysis was used to determine whether maintenance intravesical bacillus Calmette-Guerin (BCG) could reduce recurrence after transurethral resection of tumor 1 grade 3 (T1G3) superficial bladder cancer. All available published data of randomized clinical trials comparing transurethral resection plus intravesical BCG to either resection alone or resection plus another treatment on the treatment results in patients with superficial bladder cancer of T1G3 were selected for analysis. Both the fixed effects model and random effects model were applied, and the odds ratio () with its 95% confidence interval (CI) was used as the effect size estimate. Sensitivity analysis and publication bias determination were performed by funnel plots and comparing s of different models. Within the follow-up period, 375 of 915 (41.0%) BCG-treated patients and 332 of 733 (45.3%) non-BCG-treated patients developed tumor recurrence. In the combined results, a statistically significant difference in the s for tumor recurrence between the two treatment groups was found (randomized model combined effect 0.58, 95% CI 0.41 to 0.83, = 0.003). The stratified meta-analysis did not show any statistically significant confounding effects on the results when stratified by BCG strains. The randomized model combined effect of Pasteur F and other strains were 0.50 (95% CI 0.26 to 0.95, = 0.04) and 0.63 (95% CI 0.40 to 0.99, = 0.04), respectively. Therefore, we came to the conclusion that adjuvant maintenance instillation BCG combined with transurethral resection of bladder tumor (TURBT) is an effective conservative treatment for preventing recurrence of T1G3 bladder cancer.
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Can intravesical bacillus Calmette-Guérin reduce recurrence in patients with non-muscle invasive bladder

null

《医学前沿（英文）》 2014年 第8卷 第2期   页码 241-249 doi: 10.1007/s11684-014-0328-0

摘要：

Approximately 70% of newly diagnosed bladder tumors are non-muscle invasive bladder cancer (NMIBC). NMIBC accounts for approximately 80% of total bladder cancer cases. Bacillus Calmette-Guérin (BCG) instillation and maintenance is considered as the standard adjuvant treatment for superficial bladder cancer. A number of randomized studies have focused on the benefit of maintenance therapy following initial BCG induction. To provide further insights into the effect of intravesical instillation on recurrence in patients with NMIBC, we analyzed this relationship by conducting an updated detailed meta-analysis. Evidence suggested that adjuvant intravesical BCG with maintenance treatment is significantly effective for the prophylaxis of tumor recurrence in patients with NMIBC.

关键词： non-muscle invasive bladder cancer     bacillus Calmette-Guérin (BCG)     meta-analysis    

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Characterization of Bacillus amyloliquefacien contaminating 75% alcohol disinfectant

ZHANG Wanming, YUAN Yuesha, BIAN Cangli, TU Xianyu, ZHANG Wen, HUANG Huqiang, WANG Lan

《医学前沿（英文）》 2008年 第2卷 第1期   页码 113-116 doi: 10.1007/s11684-008-0021-2

摘要： The clinical characterization of Bacillus amyloliquefacien contaminating 75% alcohol disinfectants were studied. The bacteria were cultured and observed by using bacterial examination under the hospital infection monitor. According to the regulations, the resistance of bacterial to physical and chemical factors was tested. Drug sensitivity tests for 20 commonly used medicines were carried out using a K-B method. The bacterial plasmids were analyzed using the Birnboim method. The bacteria were found after being cultured in the clinically-used 75% alcohol disinfectant fluid. Their total number was more than 800 cfu/mL and they were identified as Bacillus amyloliquefacien. The bacteria were also found to be resistant to boiling for 5 min. It grew well in 95% alcohol disinfectant and was insensitive to 84 disinfectant fluids containing chlorine (1000 mg/L) and such disinfectants as ozone. They were able to be sterilized better through routine ultraviolet exposure for 30 min or gas pressure. The bacteria contained a 2.5 kb plasmid and were sensitive to 13 drugs and insensitive to 7 drugs of the 20 drugs tested. It was suggested that alcohol disinfectant fluid was easily contaminated by Bacillus amyloliquefacien, and the bacteria was resistant to disinfectant fluids such as alcohol and 84 disinfectants
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Testing of tuberculosis infection among Chinese adolescents born after terminating the Bacillus Calmette

null

《医学前沿（英文）》 2017年 第11卷 第4期   页码 528-535 doi: 10.1007/s11684-017-0573-0

摘要：

The prevalence of tuberculosis infection among adolescents born after terminating the Bacillus Calmette–Guérin (BCG) booster vaccination in China was estimated using tuberculin skin testing (TST) and QuantiFERON-TB Gold assay (QFT) to investigate the influence of neonatal BCG vaccination on the performance of TST. Data analysis was conducted for 2831 eligible participants aged 5–15 years from the baseline survey of a population-based multi-center prospective study. The prevalence rates of TST (induration≥10 mm) and QFT positivity were 9.3% (264/2827) and 2.5% (71/2831), respectively. The rate of QFT indeterminate result was 2.2% (62/2831). The overall agreement between TST and QFT was low (concordance= 88.0%; κ coefficient= 0.125). Only TST was positively associated with BCG vaccination with an adjusted odds ratio of 1.71 [95% confidence interval, 1.26–2.31]. A history of close contact with patients of active TB was significantly associated with positivity for TST and QFT. Our results suggested that BCG neonatal vaccination still affects TST performance, and a two-step approach might be considered for TB infection testing among adolescents in China.

关键词： tuberculin skin test     interferon-γ release assays     adolescent     agreement    

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Chromium phytoextraction and physiological responses of the hyperaccumulator Swartz to plant growth-promoting rhizobacterium inoculation

《环境科学与工程前沿（英文）》 2023年 第17卷 第1期 doi: 10.1007/s11783-023-1609-0

摘要：

● Improved Cr phytoextration efficiency was achieved by B. cereus inoculation.

关键词： Hexavalent chromium     Hyperaccumulator     Rhizobacteria     Leersia hexandra Swartz     Bacillus cereus     Consortia    

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解淀粉芽孢杆菌发酵红小豆的理化特性和生物活性 Article

吴珊, 卢帅, 刘军, 杨绍青, 闫巧娟, 江正强

《工程（英文）》 2021年 第7卷 第2期   页码 219-225 doi: 10.1016/j.eng.2020.10.010

摘要：

本研究采用解淀粉芽孢杆菌发酵红小豆（Vigna umbellata）,并评价了发酵红小豆的理化特性和生物活性。以纤溶酶活性为指标优化了发酵条件，在最适发酵条件下，纤溶酶活性最高达78.0 FU∙g-1（4890 IU∙g-1，纤维蛋白平板法）。发酵红小豆中多肽含量（2.1~10.9 g∙100 g-1）、总酚含量（116.7~388.5 mg没食子酸∙100 g-1）、总黄酮含量（235.5~354.3 mg芦丁∙100 g-1）、花青素含量（20.1~47.1 mg∙100 g-1）和超氧化物歧化酶活性（55.3~263.6 U∙g-1）显著增加。红小豆经发酵后的2,2-二苯基-1-苦肼基（DPPH）和2,2-联氮双（3-乙基苯并噻唑啉-6-磺酸）二铵盐（ABTS）自由基清除活性和铁离子还原抗氧化能力（FRAP）较未发酵的红小豆提高1.9~4.8倍。此外，发酵红小豆的二肽基肽酶Ⅳ（DPP-Ⅳ）抑制活性、α-葡萄糖苷酶抑制活性和抗凝血活性显著提高。解淀粉芽孢杆菌发酵红小豆具有多种功能活性，对开发预防血栓性疾病的功能食品具有重要意义。

关键词： 固态发酵     红小豆     解淀粉芽孢杆菌     抗血栓活性     抗氧化活性     降血糖活性    

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Effect of calcium lactate on compressive strength and self-healing of cracks in microbial concrete

Kunamineni VIJAY, Meena MURMU

《结构与土木工程前沿（英文）》 2019年 第13卷 第3期   页码 515-525 doi: 10.1007/s11709-018-0494-2

摘要： This paper presents the effect on compressive strength and self-healing capability of bacterial concrete with the addition of calcium lactate. Compared to normal concrete, bacterial concrete possesses higher durability and engineering concrete properties. The production of calcium carbonate in bacterial concrete is limited to the calcium content in cement. Hence calcium lactate is externally added to be an additional source of calcium in the concrete. The influence of this addition on compressive strength, self-healing capability of cracks is highlighted in this study. The bacterium used in the study is and was added to both spore powder form and culture form to the concrete. spore powder of 2 million cfu/g concentration with 0.5% cement was mixed to concrete. Calcium lactates with concentrations of 0.5%, 1.0%, 1.5%, 2.0%, and 2.5% of cement, was added to the concrete mixes to test the effect on properties of concrete. In other samples, cultured with a concentration of 1×10 cells/mL was mixed with concrete, to study the effect of bacteria in the cultured form on the properties of concrete. Cubes of 100 mm×100 mm×100 mm were used for the study. These cubes were tested after a curing period of 7, 14 and 28 d. A maximum of 12% increase in compressive strength was observed with the addition of 0.5% of calcium lactate in concrete. Scanning electron microscope and energy dispersive X-ray spectroscopy examination showed the formation of ettringite in pores; calcium silicate hydrates and calcite which made the concrete denser. A statistical technique was applied to analyze the experimental data of the compressive strengths of cementations materials. Response surface methodology was adopted for optimizing the experimental data. The regression equation was yielded by the application of response surface methodology relating response variables to input parameters. This method aids in predicting the experimental results accurately with an acceptable range of error. Findings of this investigation indicated the influence of added calcium lactate in bio-concrete which is quite impressive for improving the compressive strength and self-healing properties of concrete.

关键词： calcium lactate     bacillus subtilis     compressive strength     self-healing of cracks    

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Genomic and metabolomic analysis of with enhanced poly--glutamic acid production through atmospheric and room temperature plasma mutagenesis

《化学科学与工程前沿（英文）》 2022年 第16卷 第12期   页码 1751-1760 doi: 10.1007/s11705-022-2211-x

摘要： Poly-γ-glutamic acid is an extracellular polymeric substance with various applications owing to its valuable properties of biodegradability, flocculating activity, water solubility, and nontoxicity. However, the ability of natural strains to produce poly-γ-glutamic acid is low. Atmospheric and room temperature plasma was applied in this study to conduct mutation breeding of Bacillus licheniformis CGMCC 2876, and a mutant strain M32 with an 11% increase in poly-γ-glutamic acid was obtained. Genome resequencing analysis identified 7 nonsynonymous mutations of ppsC encoding lipopeptide synthetase associated with poly-γ-glutamic acid metabolic pathways. From molecular docking, more binding sites and higher binding energy were speculated between the mutated plipastatin synthase subunit C and glutamate, which might contribute to the higher poly-γ-glutamic acid production. Moreover, the metabolic mechanism analysis revealed that the upregulated amino acids of M32 provided substrates for glutamate and promoted the conversion between L- and D-glutamate acids. In addition, the glycolytic pathway is enhanced, leading to a better capacity for using glucose. The maximum poly-γ-glutamic acid yield of 14.08 g·L–1 was finally reached with 30 g·L–1 glutamate.

关键词： ARTP mutagenesis     Bacillus licheniformis     poly-γ-glutamic acid     metabolomics    

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The biosorption of Cr(VI) ions by dried biomass obtained from a chromium-resistant bacterium

Paul Fabrice NGUEMA,Zejiao LUO,Jingjing LIAN

《化学科学与工程前沿（英文）》 2014年 第8卷 第4期   页码 454-464 doi: 10.1007/s11705-014-1456-4

摘要： The biosorption potential of many different kinds of biomaterials has been widely studied. However, there is little data on the biosorption mechanism of Cr(VI) by dried biomass. So the bio-removal of Cr(VI) ions from aqueous solutions was investigated using dried biomass from a chromium-resistant bacterium. The bacterium was isolated from dewatered sludge samples that were obtained from a sewage treatment plant. Equilibrium and kinetic experiments were performed at different metal concentrations, pH values, and biosorbents dosages. The biomass was characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The functional groups in the biomass which may play a role in the biosorption process were identified by Fourier transform infrared spectroscopy. The biosorption process was found to be highly pH dependent and the optimum pH for the adsorption of Cr(VI) was 2.0±0.3 at 30±2 °C. The experimental data fit well with Langmuir and Freundlich models as well as a pseudo-second order kinetic model. The mechanism for the biosorption was also studied by fitting the kinetic data with an intra-particle diffusion model and a Boyd plot. External mass transfer was found to be the rate-determining step for the adsorption process. Biosorption could be an alternative mechanism besides bio-oxidation and bio-reduction for the bioremediation of heavy metals.

关键词： Cr(VI)     biomass     Bacillus cereus Pf-1     biosorption capacity     biosorbents    

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Effect of pH on biologic degradation of

Hongjing LI, Mengli HAO, Jingxian LIU, Chen CHEN, Zhengqiu FAN, Xiangrong WANG

《环境科学与工程前沿（英文）》 2012年 第6卷 第2期   页码 224-230 doi: 10.1007/s11783-011-0314-6

摘要： In this paper, the effect of pH on biological degradation of by alga-lysing bacteria in laboratory-scale sequencing batch biofilm reactors (SBBRs) was investigated. After 10 d filming with waste activated sludge, the biological film could be formed, and the bioreactors in which laid polyolefin resin filler were used to treat algal culture. By comparing the removal efficiency of chlorophyll at different aerobic time, the optimum time was determined as 5 h. Under pH 6.5, 7.5, and 8.5 conditions, the removal rates of were respectively 75.9%, 83.6%, and 78.3% (in term of chlorophyll ), and that of Chemical Oxygen Demand (COD ) were 30.6%, 35.8%, and 33.5%. While the removal efficiencies of ammonia nitrogen ( ) were all 100%. It was observed that the sequence of the removal efficiencies of algae, and organic matter were pH 7.5>pH 8.5>pH 6.5. The results showed that the dominant alga-lysing bacteria in the SBBRs was strain HM-01, which was identified as sp. by Polymerase Chain Reaction (PCR) amplification of the 16S rRNA gene, Basic Local Alignment Search Tool (BLAST) analysis, and comparison with sequences in the GenBank nucleotide database. The algicidal activated substance which HM-01 strain excreted could withstand high temperature and pressure, also had better hydrophily and stronger polarity.

关键词： pH     biological degradation     alga-lysing bacteria     sequencing batch biofilm reactor (SBBR)     16S rRNA     Bacillus sp    

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Combination of ARTP mutagenesis and color-mediated high-throughput screening to enhance 1-naphthol yield from microbial oxidation of naphthalene in aqueous system

Chenggang Qiu, Alei Zhang, Sha Tao, Kang Li, Kequan Chen, Pingkai Ouyang

《化学科学与工程前沿（英文）》 2020年 第14卷 第5期   页码 793-801 doi: 10.1007/s11705-019-1876-2

摘要： Strain QCG of the aerobic bacteria is capable of producing 1-naphthol from naphthalene, this strain was first isolated and characterized in this study. Strain QCG was mutagenized to enhance 1-naphthol production, using atmospheric and room temperature plasma (ARTP) technology. Then, a microbial clone screening system was used to accelerate the operation. Meanwhile, a novel color-mediated high-throughput screening using 4-aminoantipyrine was performed to screen mutants. The optimal mutant strain QCG4 produced 19.58±0.34 mg∙L 1-naphthol from naphthalene that was 47.32% higher than that of the original strain (13.29±0.28 mg∙L ). In addition, the optimal conditions for 1-naphthol production via whole-cell catalysis of strain QCG4 were determined to be an OD of 40, 150 mg∙L naphthalene, and 7.5% dimethyl formamide as a co-solvent at pH 7.5 and 26°C for 3 h, resulting in 41.18±0.12 mg∙L 1-naphthol, i.e., the mutant strain produces a 2.1-fold higher yield compared to the original strain.

关键词： Bacillus cereus QCG     naphthalene     1-naphthol     ARTP mutagenesis     high-throughput screening     4-aminoantipyrine    

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重构异戊二烯焦磷酸代谢以促进萜类化合物的合成 Article

徐显皓, 吕雪芹, 崔世修, 刘延峰, 夏洪志, 李江华, 堵国成, 李兆丰, Rodrigo Ledesma-Amaro, 陈坚, 刘龙

《工程（英文）》 2023年 第28卷 第9期   页码 166-178 doi: 10.1016/j.eng.2023.03.019

摘要： 在本项研究中，我们发现在枯草芽孢杆菌（Bacillus subtilis）中，中心代谢和IPP供应之间的代谢通量分配不平衡阻碍了IPP的积累。

关键词： 萜类     基因回路     枯草芽孢杆菌     异戊二烯焦磷酸    

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标题 作者 时间 类型 操作

Use of dry yeast cells as a cheap nitrogen source for lactic acid production by thermophilic

Kim Yng Ooi, Jin Chuan Wu

期刊论文

Roles of acid-producing bacteria in anaerobic digestion of waste activated sludge

Sijia Ai, Hongyu Liu, Mengjie Wu, Guangming Zeng, Chunping Yang

期刊论文

A meta-analysis of randomized trials of maintenance bacillus Calmette-Guerin instillation efficacy against

PAN Jiangang, ZHOU Xing, CHEN Zhiguang, HAN Ruifa

期刊论文

Can intravesical bacillus Calmette-Guérin reduce recurrence in patients with non-muscle invasive bladder

null

期刊论文

Characterization of Bacillus amyloliquefacien contaminating 75% alcohol disinfectant

ZHANG Wanming, YUAN Yuesha, BIAN Cangli, TU Xianyu, ZHANG Wen, HUANG Huqiang, WANG Lan

期刊论文

Testing of tuberculosis infection among Chinese adolescents born after terminating the Bacillus Calmette

null

期刊论文

Chromium phytoextraction and physiological responses of the hyperaccumulator Swartz to plant growth-promoting rhizobacterium inoculation

期刊论文

解淀粉芽孢杆菌发酵红小豆的理化特性和生物活性

吴珊, 卢帅, 刘军, 杨绍青, 闫巧娟, 江正强

期刊论文

Effect of calcium lactate on compressive strength and self-healing of cracks in microbial concrete

Kunamineni VIJAY, Meena MURMU

期刊论文

Genomic and metabolomic analysis of with enhanced poly--glutamic acid production through atmospheric and room temperature plasma mutagenesis

期刊论文

The biosorption of Cr(VI) ions by dried biomass obtained from a chromium-resistant bacterium

Paul Fabrice NGUEMA,Zejiao LUO,Jingjing LIAN

期刊论文

Effect of pH on biologic degradation of

Hongjing LI, Mengli HAO, Jingxian LIU, Chen CHEN, Zhengqiu FAN, Xiangrong WANG

期刊论文

Combination of ARTP mutagenesis and color-mediated high-throughput screening to enhance 1-naphthol yield from microbial oxidation of naphthalene in aqueous system

Chenggang Qiu, Alei Zhang, Sha Tao, Kang Li, Kequan Chen, Pingkai Ouyang

期刊论文

重构异戊二烯焦磷酸代谢以促进萜类化合物的合成

徐显皓, 吕雪芹, 崔世修, 刘延峰, 夏洪志, 李江华, 堵国成, 李兆丰, Rodrigo Ledesma-Amaro, 陈坚, 刘龙

期刊论文