Study on Extraction of Oolong Tea Assisted by Ultrasonic Wave and 4C Technique and Its Application

[Objectives]The extraction conditions of formula oolong tea were investigated by an orthogonal experiment.[Methods]The technical conditions were optimized by the 4C method,and the application of formula oolong tea extract in cigarettes was studied.[Results]①In the experimental range,the best sensory evaluation effect of formula oolong tea extract was obtained with extraction conditions of 70%ethanol as extraction solvent,extraction time h,extraction temperature 25℃,and ultrasonic frequency 80 kHz,and follow-up low-temperature concentration,low-temperature sedimentation and low-temperature centrifugation.②The effects of different centrifugal speeds on the quality of formula oolong tea extract were explored.The formula oolong tea extract obtained under the conditions of 3000 r/min and centrifugal time of 10 min showed the best evaluation effect with soft and delicate smoke,rich smoke fragrance,good comfort and refreshing mouthfeel.③The effective aroma components in the formula oolong tea extract were qualitatively analyzed by GC-MS.[Conclusions]This study provides high-quality raw materials and a theoretical basis for the research of independent flavor blending in cigarette industry enterprises.

Effects of the combined application of organic and chemical nitrogen fertilizer on soil aggregate carbon and nitrogen:A 30-year study

To understand the long-term effects of combined organic and chemical nitrogen fertilization on soil organic C(SOC) and total N(TN), we conducted a 30-year field experiment with a wheat–maize rotation system on the Huang-HuaiHai Plain during 1990–2019. The experimental treatments consisted of five fertilizer regimes: no fertilizer(control), chemical fertilizer only(NPK), chemical fertilizer with straw(NPKS), chemical fertilizer with manure(NPKM), and 1.5 times the rate of NPKM(1.5NPKM). The NPK, NPKS, and NPKM treatments had equal N inputs. The crop yields were measured over the whole experimental duration. Soil samples were collected from the topsoil(0–10 and 10–20 cm) and subsoil(20–40 cm) layers for assessing soil aggregates and taking SOC and TN measurements. Compared with the NPK treatment, the SOC and TN contents increased significantly in both the topsoil(24.1–44.4% for SOC and 22.8–47.7% for TN) and subsoil layers(22.0–47.9% for SOC and 19.8–41.8% for TN) for the organically amended treatments(NPKS, NPKM and 1.5NPKM) after 30 years, while no significant differences were found for the average annual crop yields over the 30 years of the experiment. The 0–10 cm layer of the NPKS treatment and the 20–40 cm layer of the NPKM treatment had significantly higher macroaggregate fraction mass proportions(19.8 and 27.0%) than the NPK treatment. However, the 0–10 and 20–40 cm layers of the 1.5NPKM treatment had significantly lower macroaggregate fraction mass proportions(–19.2 and –29.1%) than the control. The analysis showed that the higher SOC and TN in the soil of organically amended treatments compared to the NPK treatment were related to the increases in SOC and TN protected in the stable fractions(i.e., free microaggregates and microaggregates within macroaggregates), in which the contributions of the stable fractions were 81.1–91.7% of the increase in SOC and 83.3–94.0% of the increase in TN, respectively. The relationships between average C inputs and both stable SOC and TN stocks were significantly positive with R2 values of 0.74 and 0.72(P<0.01) for the whole 40 cm soil profile, which indicates the importance of N for soil C storage. The results of our study provide key evidence that long-term combined organic and chemical nitrogen fertilization, while maintaining reasonable total N inputs, benefited soil C and N storage in both the topsoil and subsoil layers.

Posterior scleral application of a mitomycin C-soaked sponge during trabeculectomy

AIM:To evaluate the safety and efficacy of posterior scleral application(a modified technique)of an antimetabolite mitomycin C-soaked sponge in trabeculectomy for patients with glaucoma.METHODS:This retrospective study included 101 patients(115 eyes)with glaucoma(aged 12–83y)who underwent trabeculectomy using a modified mitomycin C-soaked sponge placement method.A piece of 3.5×10 mm2 sponge was placed vertically and posteriorly with the long side perpendicular to the limbus.The mitomycin C concentration and exposure time were 0.2–0.5 mg/m L and 1–5min,respectively.Intraocular pressure,bestcorrected visual acuity,and hypotensive medications were recorded at baseline and at the final visit.Complications,interventions required,and bleb morphology were recorded postoperatively.The primary outcome was trabeculectomy safety,including complications and bleb morphology;the secondary outcome was the trabeculectomy success rate.RESULTS:At the final follow-up[median 28mo,range 7–67mo and interquartile range(IQR)13mo],the qualified(cumulative)success rate was 93.0%and the complete success rate was 60.0%.No bleb-related complications were observed.The mean height,extent,and vascularity grades were 0.6±0.9,1.1±0.4,and 2.4±0.9,respectively.All Seidel tests were negative.The mean posteriority grade was 0.8±0.4.CONCLUSION:Trabeculectomy with the long side of a mitomycin C-soaked sponge placed perpendicular to the corneal limbus is safe and effective.

Effect of Combined Application of Organic Farming Aid (OFA) and Inorganic Fertilizers on the Growth and Yield of Maize and Soil Microbial Properties in the Guinea Savannah Agro-Ecological Zone of Ghana

The aim of the study was to evaluate the effect of different rates of organic farming aid (OFA) and inorganic fertilizer on the productivity of maize, chemical and microbial properties of soil for higher economic value. Field experiments were conducted during the 2020 and 2021 cropping seasons at the research fields of CSIR-Savanna Agricultural Research Institute located at Nyankpala in the Guinea savannah agroecology of Ghana. The study consisted of five treatment combinations: full rate of OFA, full rate of NPK, 1/2 OFA + 1/2 NPK, full OFA + 1/2 NPK and a control (no OFA and no NPK) which were arranged in a randomized complete block design with four replications. Analysis of variance indicated significant (P 0.05) treatment and year interaction effect for all the growth parameters except for plant height, leaf area and leaf area index. Apart from hundred seed weight, treatment and year interaction effect for all the yield and yield components was significant (P 0.05). Application of full rate of NPK (90:60:60) resulted in the highest grain yield of 4960 kg·ha-1, however it was statistically similar to those obtained by the combined application of full rate of OFA (250 ml·ha-1) + 1/2 NPK and 1/2 OFA + 1/2 NPK with grain yield of 4856 kg·ha-1 and 4639 kg·ha-1 respectively. There was also a yield advantage of 197. 5%, 191.3%, 178.3 and 79.1% over the control for full NPK rate, full OFA rate + 1/2 NPK rate, 1/2 OFA rate + 1/2 NPK and full OFA rate respectively. Application of full OFA rate + 1/2 NPK enhanced soil basal respiration (evolved CO2) and mineralizable C, implying that, combination of full OFA rate and NPK fertilizer would be necessary to boost soil microbial activity and soil labile nutrient pool (labile C pool). This suggests that combined use of full OFA rate + 1/2 NPK fertilizer can be a better strategic tool for improving soil quality. The highest benefit cost ratios (BCR) of 2.58 and 3.77 were obtained following the application of full OFA rate + 1/2 NPK and 1/2 OFA rate + 1/2 NPK respectively. Hence, it could be concluded that complementary use of OFA and NPK is more profitable than using single inputs (either OFA or NPK). Thus, in promoting technology packages to farmers, development practitioners must carefully consider the complementary of inputs that are cost-effective but economically rewarding.

The English Subtitle Translation of Quanzhou’s World Heritage Application Documentary: A Frame Theory Perspective

Based on Fillmore’s frame theory, this paper examines the translator’s cognitive frame operation in the English subtitle translation of Quanzhou’s World Heritage application documentary. It analyzes and discusses how the translator maximizes translation effect between the source language and the target language, so as to enhance the readability of documentary subtitles and promote the spread of traditional Chinese culture. The findings are as follows: Firstly, in the translation process, the frame operations used by the translator include frame correspondence, intra-frame operations, frame replacement, frame perspective shift and frame transplantation. Secondly, cultural documentaries are full of culture-loaded words, for which the translator usually uses frame transplantation. Thirdly, due to the instantaneous nature of subtitles, intra-frame operations and frame replacement are applied in terms of cultural background of the target language audience. Besides, in order to enhance the audience’s reading experience, there may be some changes of narrative perspective in the English translation of cultural documentaries.

妊娠糖尿病患者蛋白C、蛋白S和抗凝血酶Ⅲ水平及其与孕周的关系

目的探讨妊娠糖尿病(GDM)患者蛋白C(PC)、蛋白S(PS)和抗凝血酶Ⅲ(ATⅢ)水平及其与孕周的关系。方法选择2019年1月至2023年3月在医院就诊的232例GDM孕妇作为观察组,同时随机选取同期在医院进行孕检的268例正常孕妇作为对照组,比较两组一般资料和PC、PS和ATⅢ水平;按孕周将观察组和对照组分为孕中期和孕晚期,分别比较孕中期和孕晚期观察组和对照组PC、PS和ATⅢ水平。通过相关性分析,分析PC、PS和ATⅢ水平与孕周的相关性。结果与对照组相比,观察组PS和PC水平降低(P<0.05),但ATⅢ水平差异无统计学意义(P>0.05)。GDM患者PC和ATⅢ水平与孕周呈负相关(r=-0.156、-0.134,P<0.05)。结论GDM患者PS和PC水平降低,且随孕周增大,PC、PS和ATⅢ水平降低,应尽早进行干预,以减少血栓形成的风险。

基于C/S架构和物联网技术的可移动医疗设备共享调配系统的设计与应用

目的 设计一个可移动医疗设备高效管理与临床科室共享调配相结合的医疗设备共享管理平台,实现可移动医疗设备使用的全过程管理。方法 基于C/S架构,利用物联网技术优化整合现有医疗设备大数据资源,结合医院需求,构建可移动医疗设备共享调配系统,实现医疗设备共享管理、预约借用、统计分析等核心功能。通过比较系统上线前后呼吸机调配次数、平均调配时间、呼吸机使用率、单台呼吸机日均收入4个指标,分析系统应用效果。结果 系统上线后,呼吸机调配次数明显增加、平均调配时间明显降低,呼吸机使用率、单台呼吸机日均收入明显升高,且差异均有统计学意义(P﹤0.05),表明系统对提高呼吸机调配效率与使用效率有促进作用。结论 可移动医疗设备共享调配系统优化了医院设备管理流程,实现了医疗资源的统一调配,有效满足临床紧急抢救时医疗设备调配使用的相关需求,提高了医疗设备周转率以及设备管理人员的工作效率,有助于医院节约人员成本、降低采购费用,为医院管理者制定相关决策提供数据支撑。

miR29c下调S100A4蛋白表达参与人胃癌细胞增殖促进凋亡

目的探讨miR-29c对人胃腺癌细胞增殖、凋亡的影响及其与转移相关蛋白S100A4的关系。方法采用细胞培养人胃癌细胞系BGC-823、SGC-7901和人正常胃粘膜上皮GES-1细胞,应用qRT-PCR检测各株细胞miR29c的表达。用hsamiR29c-mimics类似物(miR29c组),hsa-miR29c-inhibitor(阴性对照组)分别转染BGC-823细胞,空白对照组加入转染液,用CCK8及MTT法检测细胞增殖,流式细胞术检测细胞凋亡,Western blot检测S100A4相关肿瘤相关蛋白的表达。结果与正常胃粘膜上皮细胞GES-1表达率(1.131±0.069)相比,MiR-29c在胃癌细胞BGC823(0.254±0.025),SGC-7901(0.466±0.057)(F=57.5,P<0.05)。BGC823细胞转染miR29c模拟物后MiR-29c的表达量为:4.126±0.231,0.405±0.174,0.557±0.102,差异具有统计学意义(F=850.1,P<0.05)。转染24h、48h、72h后,MiR-29c组细胞的OD450值分别为:1.074±0.127、1.609±0.178、2.008±0.104;阴性对照组为:0.419±0.169、0.477±0.092、0.738±0.153,空白对照组为:0.830±0.305。其中,转染48h、72h后,MiR-29c组明显高于对照组(F=59.46,P<0.05)。细胞转染24h后,miR29c组细胞凋亡率分别是(6.900±0.414)%、(4.490±0.316)%、(3.850±0.243)%,,阴性对照组凋亡率分别是(10.830±0.231)%、(11.940±0.279)%、(13.530±0.941)%,空白对照组凋亡率分别是:(10.190±0.188)%、(11.76±0.569)%、(13.260±0.987),(P<0.001).各组S100A4蛋白的表达分别为0.770±0.028、1.109±0.083、1.024±0.042,(P=0.0021)。结论miR29c在胃癌细胞系中表达降低,通过抑制S100A4抑制人胃癌细胞增殖并促进胃癌细胞凋亡。

NOTCH3基因C260S位点突变导致CADASIL的临床和影像学特征分析

目的探讨NOTCH3基因第5外显子C260S位点突变导致的伴有皮层下梗死和白质脑病的常染色体显性遗传性脑动脉病(cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy,CADASIL)家系的临床和影像学特征。方法选取2021年12月首都医科大学附属北京同仁医院来自同一家庭的CADASIL患者,对所有患者进行NOTCH3基因测序,回顾性分析患者的临床表现和头颅影像学特征。复习既往文献报道的导致同一位置氨基酸改变的其他突变类型的临床及影像学特征。结果4名家庭成员中,包括先证者(46岁,女)及其两个姐姐(分别为48岁和50岁)和女儿(18岁)。先证者及其父亲、两个姐姐都有偏头痛病史,其中大姐有记忆力减退;先证者患有脑梗死及伴有视觉先兆的偏头痛;先证者女儿体健;先证者父亲因脑梗死去世。4名家庭成员均存在C260S位点的NOTCH3基因突变。既往文献无此位点突变的报道,先证者头颅MRI示右侧脑桥亚急性梗死,颞叶、脑室周围及脑干异常高信号改变,其大姐脑桥可见腔隙性梗死灶。结论NOTCH3基因第5外显子c.778T>A(p.C260S)的罕见突变导致的CADASIL发病时间早,早期会出现认知障碍。合并偏头痛的脑干梗死患者,需警惕CADASIL的可能。

基于STC12C5A60S2单片机显示模块的实验研究

以常用的STC12C5A60S2单片机为主控芯片,以实验室单片机平台为载体,分别对数码管、LCD1602、LCD12864、OLED以及TFT五种显示屏进行DS18B20温度传感器采集与显示实验。实验测试结果表明五种显示模块均能有效采集并显示当前温度值,对比分析各种显示模块的性能,为不同应用场景下的显示需求提供了参考和借鉴,具有重要的实际应用价值。

纳米C-S-H/PCE对蒸养UHPC力学性能增强机理研究

目前超高性能混凝土(UHPC)制品的力学性能有待进一步提升,采用纳米C-S-H/PCE对UHPC进行增强在理论上是一种可行的技术途径。本文研究了蒸养条件下掺入以聚羧酸(PCE)为分散剂的纳米水化硅酸钙(C-S-H/PCE)对UHPC力学性能的影响,通过测试水化热、水化产物、微观形貌和孔结构等对其机理进行了分析。结果表明,掺入3.0%(质量分数)纳米C-S-H/PCE可以显著提高蒸养UHPC的抗压强度和抗折强度。掺入纳米C-S-H/PCE可以促进UHPC的早期水化,生成更多的水化硅酸钙(C-S-H)凝胶,使水化放热温峰增高,并缩短达到水化温峰的时间。掺入纳米C-S-H/PCE可有效改善蒸养UHPC的孔结构,在掺量为3.0%(质量分数)时总孔隙率最小,有害孔比例最低。该研究可为纳米C-S-H/PCE在蒸养UHPC中的应用提供参考。

基于STC12C5A60S2的温湿度控制系统设计

文章针对环境温湿度对纺织生产影响很大的情况,设计温湿度控制系统。系统采用STC12C5A60S2为控制核心,由DHT11进行数据采集,并且采用直观的1602LCD数字显示模块,以实现温度和湿度实时显示,高温时启动外部负载降温,低温时外部负载停止工作的控制,以将温湿度控制在一定的范围内,可以帮助纺织厂生产区域控制环境温湿度,确保纺织厂的温湿度符合要求。

基于剩余电流和不平衡电流突变向量比的TN-C-S系统漏电故障检测方法

TN-C-S系统在我国应用广泛,但由于固有剩余电流大,无法区分负荷投切和故障引起的剩余电流变化,漏电总保和中保无法投运,存在安全隐患。针对该问题,提出一种基于剩余电流和不平衡电流突变量之比的漏电故障保护方法。首先,分析剩余电流回路,剩余电流和不平衡电流突变量之比在单相接地故障发生时刻突变,在负荷投切时不变。其次,基于中性线阻抗和接地阻抗不会发生突变的特征,计算故障电流突变量幅值,以故障电流突变量幅值越限作为故障判别依据,实现漏电故障检测。仿真及试验证明,所提方法可有效区分负荷投切和漏电故障,实现大幅值固有剩余电流下的漏电故障检测,在单支路和多支路系统中的检测灵敏度分别为70、150 mA,满足TN-C-S系统多级漏电保护的灵敏度要求。

10℃条件下纳米C-S-H掺量对水泥早期水化的影响

目的探究10℃条件下不同掺量纳米C-S-H对水泥早期水化进程及强度发展的影响,并分析其早强剂作用机理。方法通过溶液共沉淀法制备纳米C-S-H悬浮液,将其掺入到普通硅酸盐水泥中,在10℃条件下进行养护,分析其对水泥凝结时间、抗折强度、抗压强度的影响;通过XRD、TG等检测手段分析水泥的水化进程及对水化产物的影响。结果掺入0.05%纳米C-S-H,可使水泥初凝时间缩短9.9%,终凝时间缩短10.4%;24 h时抗折强度和抗压强度分别提高了34%和33.5%。纳米C-S-H的掺入造成水泥3 d抗折强度略有降低。水化产物中Ca(OH)2质量分数在12 h、16 h和24 h时较参比样分别提高了17.6%、21.3%和29.6%。结论在10℃条件下,纳米C-S-H的加入能够有效促进C 3S和C 2S的水化过程,形成更多的水化产物,从而缩短水泥凝结时间,提高24 h内水泥砂浆强度,28 d强度没有显著降低。

补体C1s对食管鳞状细胞癌生物学行为的影响

目的:探究补体分子C1s对食管鳞状细胞癌(ESCC)细胞增殖、迁移、黏附以及裸鼠移植瘤生长的影响。方法:利用NCBI-GEO数据库分析ESCC组织和癌旁正常组织(ANTs)中C1S mRNA的表达;采用RT-qPCR和Western blot检测ESCC细胞系中C1s的表达;利用C1s小干扰RNA(siRNA)、C1s短发夹RNA(shRNA)或C1s过表达慢病毒对ESCC细胞进行C1s的敲低或过表达,CCK-8法检测细胞增殖,细胞划痕实验检测细胞迁移,细胞-基质黏附实验检测细胞黏附能力;Western blot检测基质金属蛋白酶MMP1和MMP13表达;裸鼠皮下成瘤实验检测C1s对裸鼠移植瘤生长的影响,免疫组织化学法检测移植瘤中CD34表达,分析肿瘤微血管的形成。结果:ESCC组织中C1S mRNA表达明显高于ANTs,敲低C1s可明显抑制ESCC细胞的增殖、迁移、细胞-基质黏附以及裸鼠移植瘤的生长,而过表达C1S则具有相反的效果;C1s敲低的ESCC细胞TE-1中MMP1和MMP13的表达降低;与对照组相比,C1s过表达组移植瘤中的微血管更加丰富。结论:C1s在ESCC组织中显著上调,并促进ESCC细胞的增殖、迁移、细胞-基质黏附以及裸鼠移植瘤的生长。C1s可能在ESCC发生发展中发挥重要作用。

感应加热温度对滚珠丝杠用S55C钢微观组织及力学性能的影响

为了优化感应淬火工艺参数,改善滚珠丝杠表面硬度和力学性能,研究了滚珠丝杠用S55C钢的感应淬火工艺.利用自行设计的感应加热工装对滚珠丝杠用S55C钢试样进行感应淬火处理,使用光学显微镜和扫描电子显微镜进行微观结构表征,并采用拉伸试验、金相实验和显微硬度测试,分析了感应加热温度对试样的微观组织、显微硬度和断口形貌等方面的影响.结果表明:油冷时,当试样加热至960℃左右,微观组织为均匀细小马氏体,维氏硬度约为750,抗拉强度约为1200 MPa;水冷时,当试样加热至860℃左右,微观组织也为均匀细小马氏体,维氏硬度约为800,抗拉强度约为780 MPa;油冷试样和水冷试样在室温拉伸时所展现的断裂方式均为脆性断裂,油冷试样多表现出解理断裂特征,而水冷试样沿晶断裂特征更明显,并出现明显的冰糖状断裂形貌.该研究结果可为滚珠丝杠用S55C钢感应淬火工艺的设计提供理论依据和技术指导.

血清CysC、α-Syn联合MRI对帕金森病病情评估及诊断的意义

目的 探讨血清胱抑素C(CysC)、α-突触核蛋白(α-Syn)联合磁共振成像(MRI)对帕金森病(PD)病情评估及诊断的意义。方法 将2019年4月至2021年4月于河北省沧州中西医结合医院(下称该院)治疗的PD患者87例纳入研究作为PD组。根据Hoehn-Yahr(H-Y)分期,将PD患者分为Ⅰ~Ⅱ期13例,Ⅲ~Ⅳ期45例,Ⅴ期29例。另外,选取同期于该院进行体检的健康志愿者87例作为对照组。比较各组血清CysC、α-Syn水平,分析血清CysC、α-Syn联合MRI对PD的诊断效能。结果 PD组血清CysC、α-Syn水平均高于对照组,差异有统计学意义(P<0.05);血清CysC、α-Syn水平随着H-Y分期递增升高(P<0.05)。PD组MRI各相位值与对照组比较,黑质致密带、苍白球、壳核、尾状核相位值均降低(P<0.05);不同H-Y分期的PD患者黑质致密带、苍白球、壳核相位值比较,差异均有统计学意义(P<0.05)。CysC、α-Syn单独诊断PD的AUC分别为0.786、0.767,灵敏度分别为58.62%、64.37%,特异度分别为88.51%、87.36%;与MRI、血清CysC、α-Syn单独诊断相比,三项联合诊断PD的灵敏度和准确度较高同,差异有统计学意义(P<0.05)。结论 血清CysC、α-Syn联合MRI对PD诊断效能较高,能为评估PD病情严重程度和早期诊断提供依据。

基于外部气相沉积的S+C+L波段低色散斜率大有效面积非零色散位移光纤的设计与制备

针对现有光纤无法满足宽带光密集波分复用系统传输和S+C+L波段粗波分复用的要求,设计了一种具有中心凹陷的三角形芯+环形的折射率剖面,利用外部气相沉积工艺制备了一种非零色散位移光纤,并通过调整第一芯层的相对折射率和第二芯层与第一芯层的半径比,探究了其对光纤衰减、色散斜率和有效面积等参数的影响。研究发现,当第一芯层的相对折射率逐渐增大且第二芯层与第一芯层半径比逐渐减小时,零色散波长和有效面积逐渐减小。当第一芯层的相对折射率在0.52%~0.53%,芯层半径比在2.6~2.7时,光纤的有效面积接近70μm^(2),零色散波长在1420 nm附近,在1550 nm波段的色散系数大于8 ps·nm^(-1)·km^(-1),色散斜率为0.059 ps·nm^(-2)·km^(-1),可以较好地抑制传输过程中光非线性效应,满足长途干线网与城域网的使用要求。

Gut microbiota dysbiosis contributes toα-synuclein-related pathology associated with C/EBPβ/AEP signaling activation in a mouse model of Parkinson’s disease

Parkinson’s disease is a neurodegenerative disease characterized by motor and gastrointestinal dysfunction.Gastrointestinal dysfunction can precede the onset of motor symptoms by several years.Gut microbiota dysbiosis is involved in the pathogenesis of Parkinson’s disease,whether it plays a causal role in motor dysfunction,and the mechanism underlying this potential effect,remain unknown.CCAAT/enhancer binding proteinβ/asparagine endopeptidase(C/EBPβ/AEP)signaling,activated by bacterial endotoxin,can promoteα-synuclein transcription,thereby contributing to Parkinson’s disease pathology.In this study,we aimed to investigate the role of the gut microbiota in C/EBPβ/AEP signaling,α-synuclein-related pathology,and motor symptoms using a rotenone-induced mouse model of Parkinson’s disease combined with antibiotic-induced microbiome depletion and fecal microbiota transplantation.We found that rotenone administration resulted in gut microbiota dysbiosis and perturbation of the intestinal barrier,as well as activation of the C/EBP/AEP pathway,α-synuclein aggregation,and tyrosine hydroxylase-positive neuron loss in the substantia nigra in mice with motor deficits.However,treatment with rotenone did not have any of these adverse effects in mice whose gut microbiota was depleted by pretreatment with antibiotics.Importantly,we found that transplanting gut microbiota derived from mice treated with rotenone induced motor deficits,intestinal inflammation,and endotoxemia.Transplantation of fecal microbiota from healthy control mice alleviated rotenone-induced motor deficits,intestinal inflammation,endotoxemia,and intestinal barrier impairment.These results highlight the vital role that gut microbiota dysbiosis plays in inducing motor deficits,C/EBPβ/AEP signaling activation,andα-synuclein-related pathology in a rotenone-induced mouse model of Parkinson’s disease.Additionally,our findings suggest that supplementing with healthy microbiota may be a safe and effective treatment that could help ameliorate the progression of motor deficits in patients with Parkinson’s disease.

南秦岭柞水-山阳矿集区金盆梁金矿床成因——来自流体包裹体及C-H-O-S-Pb同位素的制约

金盆梁是南秦岭柞水-山阳矿集区勘查的一处微细浸染型金矿床,矿床成因与成矿机制尚不清楚。矿体产于上泥盆统桐峪寺组粉砂质板岩和钙质板岩中,以浸染状、脉状金锑矿化为主,成矿过程可划分为3个阶段:毒砂-黄铁矿-硅化阶段(Ⅰ)、石英-辉锑矿-白铁矿±锑氧化物阶段(Ⅱ)和方解石-石英阶段(Ⅲ)。流体包裹体及C-H-O-S-Pb同位素研究结果显示,Ⅱ阶段主要为金锑矿化,以H_(2)O-NaCl两相包裹体占绝对优势,成矿流体属于中温(200~290℃)、低盐度(w(NaCl_(eq))为0~6.0%)、低密度(0.64~0.99 g/cm^(3))的H_(2)O-NaCl±CO_(2)体系,以循环大气降水为主。无矿化的Ⅲ阶段主要发育H_(2)O-NaCl两相包裹体,含少量CO_(2)-H_(2)O-NaCl±CH_(4)、纯CO_(2)±CH_(4)及含子晶多相包裹体,流体以中低温(140~280℃)、低盐度(w(NaCl_(eq))为2.0%~8.0%)、低密度(0.68~1.02 g/cm^(3))的富CO_(2)-H_(2)O-NaCl±CH_(4)体系为主,或存在少量高温、高盐度、高密度H_(2)O-NaCl体系的岩浆热液混入。硫化物δ^(34)S值为较大负值(−12.50‰~−10.20‰),Pb同位素组成具上地壳源铅特征,成矿物质主要来源于围岩地层。综合研究表明,金盆梁金矿的成因类型属于卡林型金矿,水-岩反应(围岩硫化作用)是金富集沉淀的主要机制。