光子嫩肤技术在皮肤美容临床应用中的价值分析

目的:从光子嫩肤技术在皮肤美容临床应用中的具体体现,以临床观察的形式探讨其应用价值。方法:选取156名临床患者,将他们分为色斑组、毛细血管扩张组和胶原纤维蜕变组等单组,通过使用光子嫩肤仪器进行分组治疗并观察其临床疗效与美容满意度,观察周期为1个疗程。结果:三组患者的治疗效率差异值不明显(P0.05),证明光子嫩肤技术无论是对光损伤、毛细血管扩张还是光老化患者都具有十分明显的美容效果。三组的临床治疗效果及满意度差异值也不明显(P0.05),说明光子嫩肤技术值得客户信赖。结论:光子嫩肤在皮肤美容临床上的应用应当进行推广。     

美白祛斑药物对强脉冲光作用下的鼠皮黑色素的影响

观察美白祛斑药物对强脉冲光(intensive pulse light, IPL)作用下的鼠皮黑色素的影响,探讨IPL作用下,皮肤的黑色素的增生和美白药物之间的作用关系,以期探寻美白药物在减少光子嫩肤术并发症的作用机制.以小白鼠作为研究对象,用IPL在一定的波长及能量密度照射活体小鼠皮肤, 在照射后15 min涂抹低浓度的维A酸霜,分别在照射后的4 h、5 d,用显微镜观察涂霜剂、没涂霜剂的皮肤黑色素及其周边组织的变化情况;在照射后的1 d用多光子显微镜观察涂霜剂、没涂霜剂皮肤组织的变化.讨论了美白祛斑药物在光子嫩肤过程中抑制黑色素生成的过程,为如何减少光子嫩肤术并发症提供参考和借鉴.     

超脉冲CO2点阵激光联合光子嫩肤治疗凹陷性痤疮瘢痕的疗效及影响因素分析

摘要 目的：探讨超脉冲CO₂点阵激光联合光子嫩肤治疗凹陷性痤疮瘢痕的疗效并分析其影响因素。方法：选取2018年7月到2020年8月于本院进行治疗的凹陷性痤疮瘢痕患者共计98例作为研究对象,所有患者均采用超脉冲CO₂点阵激光联合光子嫩肤进行治疗,对患者治疗前后的症状积分以及瘢痕面积进行分析,同时根据患者治疗后的治疗效果将患者分为有效组以及对照组,利用二元Logistic回归分析超脉冲CO₂点阵激光联合光子嫩肤治疗凹陷性痤疮瘢痕疗效的影响因素。结果：患者经过超脉冲CO₂点阵激光联合光子嫩肤治疗后,症状积分以及瘢痕面积明显减小（P<0.05）,治疗后3个月的总有效率达到79.59%。将治疗有效的患者作为有效组（n=78）,将治疗无效的患者作为对照组（n=20）,单因素分析结果表明,有效组患者的年龄、抑郁自评量表评分、焦虑自评量表评分以及病程明显低于对照组患者（P<0.05）,有效组患者合并其它皮肤疾病的比例明显少于对照组患者（P<0.05）;二元Logistic回归分析结果显示：患者的年龄（OR=18.225,95%CI：6.805～31.589）、抑郁自评量表评分（OR=7.090,95%CI：2.430～21.148）、焦虑自评量表评分（OR=1.022,95%CI：1.008～1.036）、病程（OR=3.049,95%CI：1.346～6.184）以及合并其它皮肤疾病（OR=14.318,95%CI：5.234～18.595）为疗效的影响因素（P<0.05）。结论：采用超脉冲CO₂点阵激光联合光子嫩肤对凹陷性痤疮瘢痕进行治疗,能够有效改善患者的症状,临床效果显著,患者的年龄、心理状态、病程以及合并其它皮肤疾病会影响超脉冲CO₂点阵激光联合光子嫩肤对凹陷性痤疮瘢痕的治疗效果。     

植物叶片的延迟发光光谱特性

实验采用滤光片及ＩＣＣＤ图像探测系统对白菜叶及其叶绿体的超弱发光光谱进行了研究。实验方法 :选取 2 1片窄带滤光片 (波长范围 :4 70～ 75 4ｎｍ ,带宽小于 15ｎｍ) ,白光照射样品 2分钟 ,延迟 2 0秒后连续采集 6幅图像 ,每幅曝光时间为 10秒 ,每换一片滤光片都进行同样记录。数据处理结果发现 ,叶绿体与叶片的光诱导的延迟发光光谱为相似 ,二者在 5 91ｎｍ、6 35ｎｍ等处均存在较强的峰值。这证实植物的超弱发光主要来自叶绿体。另外 ,延迟发光的光谱特征不随延迟时间的增长而变化。这似乎意味着诱导的延迟发光与植物自发的超弱发光的…     

在线检测用发酵液透析分离器的研究

设计了一种膜透析分离器,以期用于发酵液中葡萄糖浓度的在线检测。对两种膜材料进行了比较,研究了压差、流速、温度和载流液种类对透析分离的影响。在给定的条件下,葡萄糖浓度在10－70mmol／L范围内透过率约为12％。透过率随操作压差、温度而变化,重现性好。Cv<4％,对酵母发酵液进行透析分离,葡萄糖透过率至少稳定48h。用于发酵过程在线检测,结果与离线检测相吻合,相关系数r=O．985。     

生物光子场的光谱分布特性研究

改装设计了分光谱段测试生物光子场辐射强度的装置;用此装置实验证明生物系统的超微弱光子辐射（ＵＰＥ）存在于从紫外－可见到红外的宽光谱范围内,而且其ｆ（λ）≌常数。此结果对于证实生物光子场的相干特性具有一定意义。     

不同光波长下大光金鱼花叶片超微弱发光的光子计数统计

用生物超微弱发光探测技术,对植物叶片的超微弱发光透过滤波片进行测量,并用量子光学中的光子计数分布统计方法得到的结果表明,不同波长下,大光金鱼花叶片的光子计数分布不同,但幼叶和老叶的光子计数分布的规律基本相同,而成熟叶片光子计数分布的规律比较紊乱。     

强脉冲光光子美容技术的回顾与进展

强脉冲光(intense pulsed light,WL)是一种高强度的,多光谱的,非相干的光源,它的波长范围在500nm～1200nm,这些特性使强脉冲光在以皮肤组织对不同波长的光具有选择性吸收并产生光热解效应的原理为基础的无损伤性皮肤美容治疗中具有较广泛的应用。同时,与传统的治疗皮肤光损伤与光老化的方法比较,强脉冲光光子美容技术具有治疗效果好以及病人恢复时问较快等优点。文中回顾了强光光子嫩肤技术的产生及近年来的研究进展,说明强脉冲光光子美容技术是一种新颖的、有效的、非损伤性的治疗皮肤光损伤、光老化的方法,具有良好的美容医疗应用前景。     

乌梢蛇的人工孵化试验

目的为了提高乌梢蛇的人工繁殖率,更好地保护和利用乌梢蛇的自然资源。方法采用重复实验法、观察法和对比法等方法对乌梢蛇卵进行了人工孵化的研究。结果每年的7月中旬至8月上旬为乌梢蛇的产卵高峰期,每次产卵数量为7～16枚(平均为11枚);最佳孵化温度为28～32℃,孵化环境的相对湿度为70％～85％,乌梢蛇的人工孵化率为75%6～100％,平均为83．84％。结论只要能满足乌梢蛇卵孵化温度和孵化环境的相对湿度等条件,就能够使乌梢蛇的人工孵化率平均达到80％以上。     

SSR和STS标记在花生栽培品种鉴定中的应用研究

采用10份花生品种材料,对通过数据库查询设计合成的SSR引物和其他作者发表的SSR引物及STS引物进行了评估,并基于品种间简单匹配系数做了聚类分析。获得62个能产生多态性片段的SSR和STS引物对,总共获得427条带,其中291条（68．1％）为多态性带。平均每对引物产生6．88条带,4．69条为多态性带;多态性条带比率为16.7％～100％,PIC值为0．254～0．952,平均为0．760。9对SSR／STS引物,即Lec-1、Ah4-26、Ah4-4、SsS14、SHPAL-1、PG71、PG43、PM36、PG22,对所采用的10份花生品种区分率达到10096。说明SSR和STS标记应用于花生品种鉴定有效。     

Restriction endonuclease mapping by crossed contact hybridization: the ribosomal RNA genes of Achlya ambisexualis.

A rapid, convenient and economical method for the hybridization of electrophoretically resolved RNA to DNA restriction fragments immobilized on nitrocellulose filters is described. DNA was digested, electrophoresed on agarose gels in a wide band and transferred to a nitrocellulose filter. The filter was then placed on the surface of a second gel containing radioactively labeled RNA electrophoresed under denaturing conditions in a similar way. The filter and gel were oriented so that the DNA and RNA bands were perpendicular to one another and the RNA was transferred from the gel through the filter under conditions which promote RNA-DNA hybridization. Following washing, the filter was autoradiographed. RNA-DNA sequence relationships could be conveniently determined from the spots produced at regions of intersection of homologous nucleic acids. The two dimensional array formed in this procedure fascilitates the rapid ordering of DNA restriction fragments. An example of its use for this purpose is presented.     

空间频率通道中噪声对体视匹配的影响

本工作希望了解噪声在各空间频率通道中对体视的影响.产生从5%至35%每隔5%的七个等级的随机点噪声图象,参照Wilson四通道模型的频率分别用两种不同滤波器对随机点立体图对(RDS)及噪声图象进行滤波,然后在各通道图对中加入不同通道噪声进行匹配观察.得到:1.高频通道的体视抗干扰能力高于低频通道.2.Gabor函数滤波后图对的体视抗干扰能力高于Butterworth滤波器滤波后的,但均低于未滤波的.3.当噪声大于15%时,低频噪声对低频图对及高频噪声对高、低频图对的体视匹配有抑制作用,而低频噪声对高频图对则影响很小.4.未滤波及各通道图对的最大噪声容限均不超过25%.     

A Monoclonal Antibody to Rabbit Brain GABA Transaminase

A monoclonal antibody of class IgG (subclass IgG1) has been prepared to rabbit brain GABA transaminase (GABA-T). This antibody reveals a single band of molecular weight 52,000 on a nitrocellulose filter blotted with purified GABA-T. On a filter blotted with unfractionated rabbit brain supernatant a major band of molecular weight 58,000 is revealed. An immunoaffinity column was prepared by coupling proteins from ascites fluid containing anti-rabbit GABA-T antibody to Bio-Rad Affi-Gel 15. This column bound purified GABA-T and extracted from unfractionated rabbit brain supernatant a protein of molecular weight 58,000, which was almost homogeneous and which had GABA-T enzyme activity. Using immunoaffinity chromatography, therefore, a high degree of purification of GABA-T may be achieved in a single step. Further, this technique may preserve an authentic form of the enzyme that is lost during the conventional purification procedure. The antibody inhibits GABA-T enzyme activity, up to a maximum of 35%.     

A filtration method for measuring cellular uptake of [14C]methylamine and other highly permeant solutes

A filtration technique has been developed for study of the uptake of [14C]methylamine by Azotobacter vinelandii. This dual filter arrangement requires a precision microporous polycarbonate film which overlays a paper filter. Cellular uptake of radioactivity is terminated by vacuum filtration of the reaction mixture onto the polycarbonate filter without dilution or washing. Filtration was complete in 0.7 s with retention of less than 0.2% of the extracellular radioactivity. The dual filter method gave 20-fold higher levels for intracellular methylamine than filtration followed by washing. Without washing, nitrocellulose filters retained 18 times more extracellular [3H]sorbitol and 80 times more extracellular [14C]methylamine than polycarbonate filters. Use of an underlying paper filter did not significantly improve the performance of nitrocellulose filters. However, addition of a paper filter reduced extracellular methylamine and sorbitol retention on polycarbonate filters by 77 and 86%, respectively. This method is generally applicable to measurement of the uptake of highly permeant molecules by cells and subcellular organelles.     

<Emphasis Type="Bold">A Research of Magnetic Control Ferrite Photonic Crystal Filter</Emphasis>

In this article, an anisotropic magnetized ferrite photonic crystal model is analyzed by using the finite-difference time-domain method. The electromagnetic wave propagates in anisotropic ferrite material and forms two kinds of Eigen propagation mode: left-hand circular polarization (LCP) mode and right-hand circular polarization (RCP) mode. Therefore, the ferrite material is used to produce photonic crystal and wave polarized by these two kinds of polarization modes can be obtained. Because the electromagnetic properties of the ferrite material are greatly influenced by the bias magnetic field, the ferrite photonic crystal band gap can be controlled by adjusting the intensity of the bias magnetic field, and then a magnetron photonic crystal filter is formed. The results show that the magnetic photonic crystal with the bias magnetic field to the LCP/RCP wave forms different pass band and band gap, which can obtain different forms of polarized wave.     

Investigations of boron uptake at the cellular level

The efficiency of recovery of P by iron oxide-impregnated filter paper, as used in the new P_i test for soil phosphorus, was found to depend on the method used for impregnating the paper with iron oxide and could range from as little as 28% to more than 98%. The greatest efficiency of recovery was obtained with filter papers which had been washed with deionised water following iron oxide-impregnation. These filter papers were also found to give the most reproducible results. ei]{gnB E}{fnClothier}     

Ion–protein interactions of a potassium ion channel studied by attenuated total reflection Fourier transform infrared spectroscopy

An understanding of ion–protein interactions is key to a better understanding of the molecular mechanisms of proteins, such as enzymes, ion channels, and ion pumps. A potassium ion channel, KcsA, has been extensively studied in terms of ion selectivity. Alkali metal cations in the selectivity filter were visualized by X-ray crystallography. Infrared spectroscopy has an intrinsically higher structural sensitivity due to frequency changes in molecular vibrations interacting with different ions. In this review article, I attempt to summarize ion-exchange-induced differences in Fourier transform infrared spectroscopy, as applied to KcsA, to explain how this method can be utilized to study ion–protein interactions in the KcsA selectivity filter. A band at 1680 cm^?1 in the amide I region would be a marker band for the ion occupancy of K⁺, Rb⁺, and Cs⁺ in the filter. The band at 1627 cm^?1 observed in both Na⁺ and Li⁺ conditions suggests that the selectivity filter similarly interacts with these ions. In addition to the structural information, the results show that the titration of K⁺ ions provides quantitative information on the ion affinity of the selectivity filter.     

Non-destructive analysis of the moisture content in shiitake mushrooms (Lentinula edodes) using near-infrared imaging at 1450 nm

Moisture content (MC) is an important factor in the freshness of shiitake mushrooms (Lentinula edodes). In this study, we developed a simple prediction method for MC of shiitake mushrooms using near-infrared (NIR) imaging at 1450 nm, as the band at 1450 nm is strongly correlated with OH groups. First, a NIR image was captured by an InGaAs sensor with a bandpass filter of 1450 nm; the captured image was then calibrated using an image taken at 1100 nm to remove shade and shape effects of mushrooms. The actual MC of shiitake mushrooms was measured using an oven-drying method, and a calibration curve was obtained for the cap surface and the gill side, respectively. The correlation coefficient reached more than 0.85, and the standard error of calibration ranged from 3.1% to 8.2%. Non-destructive MC images were quantified using the constructed calibration curves, and the experimental results showed that differences in the water-holding property can be visualized over 6 h for each side using our method.     

One-lane sequence analysis of oligodeoxyribonucleotides

Treatment of 5'-end 32P-labeled oligodeoxyribonucleotides with 0.4 M aqueous piperidinium formate, pH 2, at 37 degrees C for 6 h, followed by treatment with 1 M aqueous piperidine at 90 degrees C for 6 h, produces, after electrophoresis through 27% polyacrylamide sequencing gels, one-dimensional distributions of radioactivity from which the base sequences can be deduced. The order of intensities for the bands signaling the various bases is G greater than A greater than C greater than T. The spacing from a given band to the next higher band in the ladder was base characteristic, the order of band spacings being G greater than T greater than or equal to A greater than C. In contrast to the one-cleavage one-lane DNA sequencing method reported earlier (B. J. B. Ambrose and R. C. Pless, 1985, Biochemistry 24, 6194-6200), which was based on treatment of end-labeled DNA with hot aqueous piperidine in the presence of sodium chloride, the present method produces a salt-free hydrolysate, thus minimizing electrophoretic irregularities in the fastest moving bands.     

Compatibility of Temperature Sensor and Polarization Filter Based on Au Film and Glycerin Selectively Infilling Photonic Crystal Fibers

The Au film and glycerin selectively infilling photonic crystal fibers are analyzed by the finite element method. One cladding air hole is coated with Au film and infiltrated with glycerin to form a defect core. The simulation results show that both of the defect core modes formed on the glycerin and Au film can inspire resonance with core modes. The maximum sensitivity can reach to 2.50 nm/ ^°C in x polarized direction and 2.00 nm/ ^°C in y polarized direction for the temperature sensor, respectively. Furthermore, we obtain that the confinement losses of the photonic crystal fibers (PCFs) can meet with 321.442 dB/cm and 445.958 dB/cm at a short wavelength band (1460 ～1530 nm) and an extended wavelengths band (1360 ～1460 nm) for x polarized direction and y polarized direction respectively, which can be applied in many polarization filter devices as well. The compatibility of temperature sensor and polarization filter based on an identical structure can be realized at different wavelengths.