Diagnostic model of saliva protein finger print analysis of patients with gastric cancer

AIM:To explore the method for early diagnosis of gastric cancer by screening the expression spectrum of saliva protein in gastric cancer patients using mass spectrometry for proteomics.METHODS:Proportional peptide mass fingerprints were obtained by analysis based on proteomics matrix-assisted laser desorption ionization time-of-flight/mass spectrometry.A diagnosis model was established using weak cation exchange magnetic beads to test saliva specimens from gastric cancer patients and healthy subjects.RESULTS:Significant differences were observed in the mass to charge ratio(m/z) peaks of four proteins(1472.78 Da,2936.49 Da,6556.81 Da and 7081.17 Da) between gastric cancer patients and healthy subjects.CONCLUSION:The finger print mass spectrum of saliva protein in patients with gastric cancer can be established using gastric cancer proteomics.A diagnostic model for distinguishing protein expression mass spectra of gastric cancer from non-gastric-cancer saliva can be established according to the different expression of proteins 1472.78 Da,2936.49 Da,6556.81 Da and 7081.17 Da.The method for early diagnosis of gastric cancer is of certain value for screening special biological markers.

Chromatographic finger print analysis of anti-inflammatory active extract fractions of aerial parts of Tribulus terrestris by HPTLC technique

Objective:To develop HPTLC fingerprint profile of anti-inflammatory active extract fractions of Tribulus terrestris(family Zygophyllaceae).Methods:The anti-inflammatory activity was tested for the methanol and its fractions(chloroform,ethyl acetate,n-butanol and aqueous)and chloroform extract of Tribulus terrestris(aerial parts)by injecting different groups of rats(6 each)with carrageenan in hind paw and measuring the edema volume before and 1,2 and 3 h after carrageenan injection.Control group received saline i.p.The extracts treatment was injected i.p.in doses of 200 mg/kg 1 h before carrageenan administration.Indomethacin(30 mg/kg)was used as standard.HPTLC studies were carried out using CAMAG HPTLC system equipped with Linomat IV applicator.TLC scanner 3.Reprostar 3,CAMAG ADC 2 and WIN CATS-4 software for the active fractions of chloroform fraction of methanol extract.Results:The methanol extract showed good antiedematous effect with percentage of inhibition more than 72%,indicating its ability to inhibit the inflammatory mediators.The methanol extract was re-dissolved in 100 mL of distilled water and fractionated with chloroform,ethyl acetate and n-butanol.The four fractions(chloroform,ethyl acetate,n-butanol and aqueous)were subjected to anti-inflammatory activity.Chloroform fraction showed good anti-inflammatory activity at dose of 200 mg/kg.Chloroform fraction was then subjected to normal phase silica gel column chromatography and eluted with petroleum ether-chloroform,chloroform-ethyl acetate mixtures of increasing polarity which produced 15 fractions(F1-F15).Only fractions F1,F2,F4,F5,F7,F9,F11 and F14 were found to be active,hence these were analyzed with HPTLC to develop their finger print profile.These fractions showed different spots with different R_f values.Conclusions:The different chloroform fractions F1,F2,F4,F5,F7,F9,F11 and F14 revealed 4,7,7,8,9,7,7 and 6 major spots,respectively.The results obtained in this experiment strongly support and validate the traditional uses of this Sudanese medicinal plant.

Tunnel personnel positioning method based on TOA and modified location-fingerprint positioning

To position personnel in mines, the study discussed in this paper built on the tunnel personnel positioning method on the basis of both TOA and location-finger print(LFP) positioning. Given non-line of sight(NLOS) time delay in signal transmission caused by facilities and equipment shielding in tunnels and TOA measurement errors in both LFP database data and real-time data, this paper puts forth a database data de-noising algorithm based on distance threshold limitation and modified mean filtering(MMF), as well as a real-time data suppression algorithm based on speed threshold limitation and MMF.On this basis, a nearest neighboring data matching algorithm based on historical location and the speed threshold limitation is used to estimate personnel location and realize accurate personnel positioning.The results from both simulation and the experiment suggest that: compared with the basic LFP positioning method and the method that only suppresses real-time data error, the tunnel personnel positioning methods based on TOA and modified LFP positioning permits effectively eliminating error in TOA measurement, making the measured data close to the true positional data, and dropping the positioning error:the maximal positioning error in measurements from experiment drops by 9 and 3 m, respectively, and the positioning accuracy of 3 m is achievable in the condition used in the experiment.

DNA fingerprinting of Bacillus cereus from diverse sources by restriction fragment length polymorphism analysis

Bacillus cereus is an opportunistic pathogen causing food poisoning manifested by diarrhoeal or emetic syndrome. It is closely related to animal and human pathogens Bacillus anthracis and the insect pathogen Bacillus thuringiensis. In the present study, antibiotic resistance, heavy metal tolerance &molecular typing of Bacillus cereus from diverse sources such as soil, sewage water, air, fresh water, sea water and milk were studied. Bacillus cereus resistant to Penicillin (10 units/ml) and Amoxycillin (10 µg/ml);sensitive to Cobalt and Mercury even at 1 mM concentration were determined. All the isolate had plasmid ranging in number from 3-5 and their molecular weight ranged from 3.0 kb-2.0 kb. Plasmid DNA band specific to 6,557 bp has been found in Bacillus cereus isolated from sewage water, air, fresh water, sea water and milk.

HPLC Finger-print Study of Marchantia convoluta in Guangxi

[Objectives]To establish HPLC finger-print of Marchantia convolute Gao et Chang,and to control the quality of medicinal materials. [Methods] Agilent ZORBAX SB-C18 chromatographic column( 4. 6 mm × 250 mm,5μm) was adopted,acetonitrile( B)-0. 1% phosphoric solution( D) was used as the mobile phase( gradient elution),and the detection was conducted at the wavelength of 230 nm and at the column temperature of 25℃. HPLC finger-print of herb materials in the upland-field was established,and 8 lots of medicinal materials were used for the similarity assessment to establish the finger-print. [Results] Theprecision,repeatability and stability RSD of HPLC finger-prints of the 8 lots of Marchantia convoluta Gao et Chang were all less than 3%,and their similarities were all greater than 0. 75; 6 common peaks were observed,and the control finger-print was also established. [Conclusions] With reliable data and simple and efficient manipulations,HPLC finger-print analysis can provide references for the quality assessment of Marchantia convoluta Gao et Chang.

Local Binary Patterns and Its Variants for Finger Knuckle Print Recognition in Multi-Resolution Domain

Finger Knuckle Print biometric plays a vital role in establishing security for real-time environments. The success of human authentication depends on high speed and accuracy. This paper proposed an integrated approach of personal authentication using texture based Finger Knuckle Print (FKP) recognition in multiresolution domain. FKP images are rich in texture patterns. Recently, many texture patterns are proposed for biometric feature extraction. Hence, it is essential to review whether Local Binary Patterns or its variants perform well for FKP recognition. In this paper, Local Directional Pattern (LDP), Local Derivative Ternary Pattern (LDTP) and Local Texture Description Framework based Modified Local Directional Pattern (LTDF_MLDN) based feature extraction in multiresolution domain are experimented with Nearest Neighbor and Extreme Learning Machine (ELM) Classifier for FKP recognition. Experiments were conducted on PolYU database. The result shows that LDTP in Contourlet domain achieves a promising performance. It also proves that Soft classifier performs better than the hard classifier.

六君子汤中理气药陈皮挥发性成分与胃肠动力调节关联性研究

目的从胃动力调节角度分析理气药陈皮挥发性成分在补气方剂六君子汤中的理气作用,比较不同陈化年份的陈皮挥发性成分对脾虚大鼠胃排空和小肠推进的影响,进而挖掘六君子汤中理气药陈皮挥发性成分与调节脾虚大鼠胃肠动力的关联性成分。方法采用GC构建15批不同陈化年份的陈皮药材挥发油类成分的指纹图谱,以胃排空和小肠推进为指标评价陈皮挥发性成分改善胃肠动力作用,采用偏最小二乘回归分析以及灰度分析法分析指纹图谱与调节脾虚大鼠胃肠动力相关性。结果陈皮挥发油成分均可促进胃排空及小肠推进,其在六君子汤中的增益作用强度以5、10年最佳。在15批不同陈化年份的陈皮药材挥发油类成分的GC图谱中,峰3、峰4、峰9为发挥胃肠道调节作用的可能药效成分。结论六君子汤中理气药陈皮挥发性成分通过增益脾虚大鼠胃动力达到理气补气之效,此增益作用为多种有效成分共同起效的结果。该研究初步揭示了六君子汤中理气药陈皮挥发性成分的理气作用与脾虚胃动力调节的关联性,为探索补气方剂六君子汤中陈皮理气作用的物质基础提供一种新思路。

^(60)Co-γ射线辐照灭菌对牡丹皮质量影响的多元评价研究

为考察^(60)Co-γ射线辐照灭菌对牡丹皮质量的影响,本研究采用不同吸收剂量(0、5、10、20、30 kGy)^(60)Co-γ射线辐照处理试验样品,比较辐照前后样品微生物负载变化、高效液相色谱(HPLC)指纹图谱相似度、水提物抑菌活性的变化,并建立牡丹皮近红外光谱一致性评价模型。结果表明,当吸收剂量为5 kGy时即可让微生物负载超标样品中的需氧菌总数、霉菌和酵母菌总数及耐胆盐革兰阴性菌数量降至标准规定(《美国药典》USP-NF2023)以下;随着吸收剂量的增加,牡丹皮样品指纹图谱相似度呈下降趋势;辐照后样品水提物对金黄色葡萄球菌的抑菌圈直径与未辐照相比无显著差异(P>0.05);采用近红外光谱一致性评价模型能够较好地区分辐照与未辐照样品。鉴于不适宜的^(60)Co-γ射线辐照剂量可能会对牡丹皮质量造成一定影响,建议牡丹皮的辐照吸收剂量不超过5 kGy。本研究结果可为牡丹皮辐照灭菌吸收剂量的选取提供参考依据。

鼠曲草抗慢性阻塞性肺疾病的质量标志物筛选

目的筛选鼠曲草抗慢性阻塞性肺疾病(COPD)的质量标志物并测定其含量。方法通过网络药理学以“鼠曲草”为检索条件预测其抗COPD的有效成分及靶点。采用《中药色谱指纹图谱相似度评价系统(2012年版)》建立10批鼠曲草药材(S1~S10)的高效液相色谱(HPLC)指纹图谱,指认共有峰,进行相似度评价;并进行聚类分析、主成分分析和正交偏最小二乘-判别分析,以变量重要性投影(VIP)>1为标准筛选影响鼠曲草质量的差异性成分作为质量标志物。采用同一HPLC法测定10批样品中上述差异性成分的含量。结果网络药理学检索得到槲皮素、木犀草素、绿原酸等黄酮类和有机酸类共10种主要活性成分,与抗COPD密切相关的靶点有91个。10批样品中共指认出9个共有峰,相似度均大于0.90,其中绿原酸、咖啡酸、1,3-O-二咖啡酰基奎尼酸、芹菜素7-O-β-D-吡喃葡萄糖苷为差异性成分;S3、S4、S6、S7、S10聚为一类,S2、S5、S8、S9聚为一类,S1聚为一类。10批鼠曲草药材中绿原酸、咖啡酸、1,3-O-二咖啡酰基奎尼酸、芹菜素7-O-β-D-吡喃葡萄糖苷的含量分别为0.070~7.653、0.010~0.097、0.001~0.036、0.508~6.627mg/g。结论绿原酸、咖啡酸、1,3-O-二咖啡酰基奎尼酸、芹菜素7-O-β-D-吡喃葡萄糖苷可作为鼠曲草的潜在质量标志物,其中绿原酸成分含量以江西吉安产鼠曲草最高,咖啡酸成分含量以江西吉安与福建三明产鼠曲草最高,后两种成分含量以广东潮汕产鼠曲草最高。

HPLC-FP法同时测定新品富硒竹笋中10种核苷类成分的含量

目的:建立同时测定不同品种富硒竹笋中胞嘧啶、尿嘧啶、胞苷、次黄嘌呤、尿苷、胸腺嘧啶、腺嘌呤、鸟苷、胸苷、腺苷10种核苷类化合物含量的方法。方法:运用HPLC法同时测定21种不同品种竹笋的核苷类化合物含量,色谱柱为InertsilODS-3C_(18),流动相为乙腈-水(梯度洗脱),检测波长为260nm,流速为0.8 mL·min~(-1),柱温为30℃,进样量为20μL。绘制21种富硒竹笋的指纹图谱进行相似度评价,确定共有峰,并用主成分分析、相关性分析和聚类分析对21种不同富硒竹笋的核苷类化合物含量测定结果进行分析。结果:10种核苷类成分在30 min内达到分离,线性关系良好(R2≥0.9990),精密度、稳定性、重复性、准确度试验RSD均小于2%。不同品种富硒竹笋中10种核苷类成分含量与结构比差异明显,并且核苷类化合物成分指标互相间存在着不同程度的相关性。通过主成分分析,提取了4个主成分,并确定了胸苷、胸腺嘧啶、腺苷、鸟苷为4项核心指标,可用于评价不同品种富硒竹笋的品质;通过相关性分析,得出尿嘧啶与胞苷、鸟苷与胸苷、胸苷与腺苷等指标间相关性较高,指标之间的含量会互相影响;通过聚类分析,得出新品富硒竹笋主要集中为一类,市场上常见的富硒竹笋主要分为两类。结论:该实验方法操作快速、简便,重现性好,可用于21种富硒竹笋中10种核苷类化合物的含量测定。同时,测定结果为竹笋的后期高效开发和利用提供理论依据。

超高频RFID多标签目标位置感知方法研究

精确的室内定位方法是发展工业4.0时代的重要基础。然而,精准的定位往往需要大量的基础投入。本文探索基于超高频RFID的多标签室内定位方法,希望在定位精度和成本上取得平衡。传统RSSI信号指纹定位方法在实际应用中较为复杂,研究利用多标签简化地图信号指纹数据库的算法,降低构建的时间成本,并在实验中取得平均定位误差优于RSSI传统定位的结果,满足了室内定位的精度要求,具有定位成本低、定位精度高、抗干扰能力强等特点。

干燥方式对麦门冬汤浸膏粉超高效液相色谱及物理指纹图谱的影响

目的:考察不同干燥方式对麦门冬汤浸膏粉超高效液相色谱(UPLC)及物理指纹图谱的影响。方法:分别采用喷雾干燥、真空干燥、鼓风干燥、冷冻干燥4种干燥方式制备麦门冬汤浸膏粉,建立UPLC指纹图谱,并以5个一级指标和9个二级指标构建物理指纹图谱,采用相似度评价、聚类分析和主成分分析分别比较UPLC指纹图谱和物理指纹图谱的差异,通过计算可压性参数比较4种麦门冬汤浸膏粉的压缩成型性。结果:4种麦门冬汤浸膏粉的UPLC指纹图谱相似度均大于0.95,物理指纹图谱的相似度分别为0.955、0.888、0.987、0.941;UPLC指纹图谱和物理指纹图谱的聚类分析均将4种麦门冬汤浸膏粉分为2类;主成分分析分别提取出3个和2个主成分,分别包含了原始数据100%和90.03%的信息;喷雾干燥粉的压缩成型性最优。结论:不同干燥方式对麦门冬汤浸膏粉的UPLC指纹图谱影响不大,对其物理指纹图谱影响较明显。

一种手指关节康复训练器械的设计与动力学仿真分析

针对指伸肌麻痹、手指及腕挛缩无力等手指功能障碍患者康复设计了一种可穿戴式康复训练器械。整体器械与上肢固定护具结构基于逆向工程个性化定制。通过推导其位形运动学,求解训练器械的各个关节运动参数与指节的位置姿态之间的关系,探究康复训练过程。使用ADAMS对手指关节康复训练器械做动力学仿真分析,验证了手指康复训练器械设计方案的正确性。按照该方案3D打印制作出物理样机,开展试验对比和优化设计,为实现个性化上肢关节康复训练器械的研制提供重要技术支持。

环草石斛的~1H-NMR指纹图谱解析

目的:对环草石斛Dendrobium loddigesii的1H-NMR指纹图谱进行解析。方法:应用硅胶柱色谱法分离环草石斛SCEA的化学成分,鉴定单体化合物的结构并对其进行1H-NMR研究,从而实现环草石斛的1H-NMR指纹图谱解析。结果:不同来源的环草石斛样品,其1H-NMR指纹图谱有很好的重现性和高度的特征性。从其SCEA中分得4个主要成分,经光谱分析鉴定了其结构,分别为moscatilin(1),moscatin(2),gigantol(3)和十八碳二烯酸单甘油酯(4)。结论:环草石斛的1H-NMR指纹图谱可用于其基源鉴定,并主要显示了以上4个化合物的特征共振信号;化合物3和4为首次从环草石斛分离鉴定。

一种提高RAPD技术扩增效率的有效方法

RAPD技术是由Williams等于1990年首先创立的一种DNA分子标记技术。但是由于低的退火温度和短的引物序列等原因 ,常常使得RAPD技术的分辨率和可重复性低。本文介绍一种通过延长从退火到延伸的ramp时间 ,提高RAPD产物的分辨率和产量 ,由此提高RAPD技术的扩增效率的有效方法。

苦皮藤根皮的~1HN MR指纹图解析

目的 对苦皮藤的1HNMR指纹图进行解析。方法 用硅胶柱色谱法分离苦皮藤根皮CGEA的化学成分 ,鉴定单体化合物的结构并对其进行1HNMR研究 ,从而实现苦皮藤根皮的1HNMR指纹图解析。结果 不同来源的苦皮藤样品 ,其1HNMR指纹图有很好的重现性和高度的特征性。从其CGEA中分得 3个主要成分 ,经光谱分析鉴定其结构 ,分别为 :angulatinA ( 1) ,angulatinB ( 2 )和angulatinC ( 3 )。 结论 苦皮藤根皮的1HNMR指纹图可用于其基源鉴定 ,并主要显示了以上 3个化合物的特征共振信号 ;化合物 3为新化合物 ,化合物

利用ISSR分析技术鉴定贵州枇杷新种质的研究

为探索枇杷新种质的鉴定方法,利用ISSR标记,构建了贵州18个枇杷栽培品种及课题组选育的7个优良新种质的DNA指纹图谱,并分析其相互间的亲缘关系。结果表明:以筛选出的15条引物进行PCR扩增,获得清晰、重复性好的谱带172条,其中多态性谱带157条,多态性比例为91.3%;应用3个引物825、834和848的组合,构建了25份枇杷品种(系)的ISSR指纹图谱,可以有效区分所有供试材料;聚类分析显示,在相似性系数为0.60时,可将供试种质分成2大类:一类主要为原产于浙江的品种(系),另一类主要为原产于四川的品种及选育的新种质;因此,ISSR标记能有效地用于枇杷栽培种及新种质的分子鉴定及其亲缘关系的解析。

灰色系统理论在中药色谱指纹图谱模式识别中的应用研究

建立了基于灰色系统理论的中药色谱指纹图谱模式识别模型。运用基于范数与信息熵赋权法的灰色关联分析,求出各待比较图谱特征变量数据序列与理想图谱特征变量数据序列之间的灰色关联度,并依据模糊匹配中的"最大匹配度"原则进行判断,从而达到品种识别和质量评价的目的。该模型在56批次不同品种化橘红药材样品的高效液相色谱分析中取得较满意的结果:熵权与范数的灰色关联分析均能准确识别出毛橘红与光橘红两个品种,克服了传统相似度或灰色关联在化橘红色谱指纹图谱分析中的误判问题;对药材中化学成分的种类与含量十分接近的毛橘红不同栽培品种的识别率超过92.85%。此外,该模型计算量较少,整个模式识别过程通过计算机编程实现,操作简单。实验结果显示,灰色系统理论在中药色谱指纹图谱模式识别中有良好的适应性。

虎杖,何首乌和掌叶大黄,唐古特大黄的^1HNMR指纹图解析

目的：对中药材虎杖、何首乌和掌叶大黄、唐古特大黄的１ＨＮＭＲ 指纹图进行解析研究，并比较蓼属与大黄属植物１ＨＮＭＲ 指纹图的差别。方法：应用硅胶柱色谱法和结晶法分离特征化学成分，对单体化合物进行１ＨＮＭＲ研究，从而实现中药材１ＨＮＭＲ 指纹图的解析。结果：从虎杖和何首乌特征总提物Ａ 中均分离出大黄素甲醚，其１ＨＮＭＲ 指纹图均主要显示大黄素甲醚的特征共振峰，两者既有相似性，又有一定的差别。从两种大黄属植物特征总提物Ａ中均分离出大黄酚和大黄素甲醚，其特征总提物Ａ 的１ＨＮＭＲ指纹图均主要显示大黄酚和大黄素甲醚的特征共振峰。蓼属与大黄属植物的１ＨＮＭＲ 指纹图既存在相同的部分，又有本质区别。结论：１ＨＮＭＲ 指纹图可用于虎杖和何首乌、掌叶大黄和唐古特大黄的品种鉴别及蓼属和大黄属植物的分类鉴别。

五味子药材不同提取方法的HPLC指纹图谱分析

五味子药材分别经氯仿、甲醇、乙醇、50%乙醇、水提取和CO2超临界萃取(SFE)后得6种供试品,采用高效液相色谱(HPLC)法对其进行测定,并对4种木脂素成分进行了定量分析.结果表明该分析方法的精密度、重现性、稳定性较好,可用于五味子药材的指纹图谱测定,为其原料药材和实际应用提供质量控制依据,也为不同提取方法提供参考.