桑椹果酒酵母筛选及发酵性能

从桑椹成熟果实、桑叶以及桑果园的土壤采样，进行桑椹果酒专用酵母的筛选，得到一株在性能上优于对照菌葡萄酒干酵母的酵母菌Y11。该菌起酵快，从第2天开始糖度大幅度下降，酒精度快速上升，发酵第4天酒精体积分数即可达到10％以上。发酵过程pH值变化趋势比较平缓，发酵结束后高级醇量符合要求。综合发酵性能及感官评定，表明该菌能代替葡萄酒干酵母用于桑椹果酒的生产。     

Three-dimensional magnetic resonance myocardial motion tracking from a single image plane.

Three-dimensional imaging for the quantification of myocardial motion is a key step in the evaluation of cardiac disease. A tagged magnetic resonance imaging method that automatically tracks myocardial displacement in three dimensions is presented. Unlike other techniques, this method tracks both in-plane and through-plane motion from a single image plane without affecting the duration of image acquisition. A small z-encoding gradient is subsequently added to the refocusing lobe of the slice-selection gradient pulse in a slice following CSPAMM acquisition. An opposite polarity z-encoding gradient is added to the orthogonal tag direction. The additional z-gradients encode the instantaneous through plane position of the slice. The vertical and horizontal tags are used to resolve in-plane motion, while the added z-gradients is used to resolve through-plane motion. Postprocessing automatically decodes the acquired data and tracks the three-dimensional displacement of every material point within the image plane for each cine frame. Experiments include both a phantom and in vivo human validation. These studies demonstrate that the simultaneous extraction of both in-plane and through-plane displacements and pathlines from tagged images is achievable. This capability should open up new avenues for the automatic quantification of cardiac motion and strain for scientific and clinical purposes.     

阿弗菌素产生菌SIPI-AV-99081的选育

阿弗菌素链霉菌SIPI-AV-99081采用UV和NTG进行诱变处理。选育得到一高产菌株和几个典型的突变株。高产菌株AV-h-360的阿弗菌素B1的生产能力较出发菌株提高了3倍，AV-m-486和AV-m-796为阿弗菌素合成阻断突变株，它们都不能产生天然的阿弗菌素。     

耐磷酸盐土霉素菌株选育和发酵的研究

以土霉素生产菌株138^#为出发菌株，经饥饿培养、5-FU、UV、咖啡因复合诱变处理，再用含高磷酸盐的培养基定向筛选，得到高产突变菌株100^#。该突变株遗传特性稳定，代谢特性优于出发菌株，经57m^3发酵罐生产验证，生产稳定，低效价罐批减少59．5％，在磷酸盐浓度提高到0.04％～0.05％时，统计一年的正常罐批平均发酵效价比对照菌株提高5．76％。     

Relations between upper limb soft tissue disorders and repetitive movements at work

To make a preliminary assessment of whether upper limb soft tissue disorders might be associated with activities at work, we have conducted a case-control study of subjects attending orthopedic clinics in three cities. All subjects between the ages of 16 and 65 years, in whom defined soft tissue conditions of the upper limb were diagnosed by the participating orthopedic surgeons, were invited to take part. Controls were subjects attending the same clinics within the same age range whose clinical diagnosis did not include disease of the upper limb, cervical or thoracic spine. Information concerning repetitive movements of the upper limbs at work was elicited by questionnaire. Five hundred eighty cases and 996 controls were studied, representing 96% and 93%, respectively, of those invited to participate. The diagnoses of the cases included soft tissue conditions affecting the shoulder, elbow, forearm, wrist, thumb, hand, and fingers. The diagnoses of the controls included traumatic, degenerative, and inflammatory conditions, mostly of the legs and lower back. Women predominated among the cases (70%) and men among the controls (56%). Of 221 female cases with injury to the wrist and forearm, 32 were cleaner/domestics (14.5%) compared to 35 of 439 controls (8%), a difference statistically significant at the 2 1/2% level. Other jobs significantly overrepresented (5% level) among female cases with injuries at various anatomical sites included hairdressers, secretary/temps, assembly line workers, and machine operators (type unspecified). Among male cases, electricians were significantly overrepresented (5% level). Jobs for which there was a suggestion (p < 0.1) of overrepresentation among cases included butchers and teacher/ lecturers (both males only) and the combined job groups (chosen a priori for analysis) of keyboard operators, machine operators, and music teachers (all three jobs, females only).     

日本血吸虫亲免素基因的扩增及序列分析

[目的]研究日本血吸虫亲免素基因编码序列的结构及进行初步的功能预测.[方法]用5'端和3'端锚定PCR从尾蚴文库中扩增,以获取日本血吸虫中国大陆株亲免素基因完整的开放阅读框(open readingframe,ORF);用生物信息学技术确认其是否为亲免素编码基因并进行结构功能的初步分析和预测.[结果]用5'端和3'端锚定PCR从尾蚴文库中获得了亲免素基因5'端和3'端所缺序列,得到的亲免素基因cDNA的总序列长为1 438 bp,其ORF长1 296 bp,编码431个氨基酸.利用生物信息学技术鉴定其为日本血吸虫亲免素基因的完整cDNA序列.并用RT-PCR从日本血吸虫尾蚴mRNA扩增出亲免素基因的ORF.[结论]成功获得了日本血吸虫亲免素编码基因的全长cDNA,为进一步的功能研究打下了基础.     

不同状态人体牙槽骨的弹性性质

人体下颌牙槽骨皮质骨是各向异性复合生物材料,组织结构上类似于胶原羟磷灰石纤维增强的单向纤维增强复合材料。本文应用电测法测试了不同状态人体下颌牙槽骨皮质骨在平面应力状态下的各向异性弹性常数。     

Non-nociceptive capsaicin-sensitive nerve terminal stimulation allows for an original vasodilatory reflex in the human skin

A significant increase of cutaneous laser Doppler flowmetry was found before blood flow decreases with increasing pressure during a 5 mmHg min⁻¹ increase of pressure strain on the finger. Pre-treatment with a local anaesthetic or chronically applied capsaicin, resulted in the disappearance of the vasodilatory response. These results suggest an original vasodilatory axon reflex response to non-noxious pressure strain which is initiated by capsaicin-sensitive nerve terminals in the human skin.     

电阻应变式传感器在下肢牵引手术中的应用

目的 研究电阻应变式传感器（RSS）在不同下肢骨折类型手术中的应用。方法 选择2020年10月—2022年8月中国科学技术大学附属第一医院收治的外伤性下肢骨折患者99例,按照骨折类型分为股骨粗隆间骨折组79例、股骨干骨折组15例、股骨颈骨折组5例。患者均在牵引床上行闭合复位内固定术,使用RSS测量3组不同骨折类型手术中的初始牵引力、牵引时长、松解牵引力。记录手术时间、术中出血量,术后评分及3组不同骨折类型手术前后血色素变化及输血情况;比较使用不同内固定方式（长髓内钉、短髓内钉、空心钉）的术中牵引力和手术出血量、手术时间;比较长髓内钉固定患者和短髓内钉固定患者时下肢旋转角度。结果 3组不同骨折类型初始牵引力、牵引时长、松解牵引力、手术时长、术中出血量、术后评分比较,差异均有统计学意义（P <0.05）。3组不同骨折类型术前、术后血红蛋白、红细胞压积比较,差异均有统计学意义（P <0.05）。3组术中输血情况比较,差异有统计学意义（P <0.05）,术后输血情况比较,差异无统计学意义（P>0.05）。使用不同内固定方式的患者牵引总时长、年龄、术中出血量、手术时间比较...     

Restriction endonuclease analysis of varicella-zoster vaccine virus and wild-type DNAs

The DNA from several clinical isolates of varicella-zoster virus (VZV) were compared with the DNA from the vaccine strain VZV using three restriction endonucleases: BamHI, BgII, and HpaI. When electrophoresed through an agarose gel, the vaccine DNA digestion pattern was significantly different from the digestion patterns of the wild-type DNAs. Variations in the digestion pattern of the separate clinical isolates were also observed.