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DOD喷码机功能不断延伸——访科诺华麦修斯电子技术(北京)有限公司麦修斯标识部经理高建国
大字符喷码机,业内通常称之为DOD喷码机,由于其喷印字符较大,因此在食品行业广泛应用于食品外包装的批号,生产日期,有效日期及条形码的喷印.麦修斯国际成立于1850年,长期专注于大字符喷码机的研发和制造.自上世纪70年代研制出世界上第一台大字符喷码机以来,产品在全球大字符喷码机市场一直保持占有率第一的位置.
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Objective. To investigate the association of carotid arterial intima media thickness (IMT) with principal cardiovascular risk factors in the elderly. Methods. Carotid arterial IMT was measured by high resolution B mode ultrasound in 94 elderly subjects (old aged group), and compared with subjects aged < 60 (middle-aged group). Results. In comparison with the middle-aged group, the prevalence of coronary heart disease, cerebral vascular disease, hypertension and diabetes mellitus was significantly higher, and serum cholesterol and systolic blood pressure were also significantly higher in old aged group. Although there was no obvious difference in IMT between the two groups, carotid plaque and carotid wall thickening were more frequently found in old aged group. Age, systolic blood pressure and serum cholesterol were shown as the independent determinants for carotid IMT in the total participants, whereas no such independent relation was found in old-aged group. Conclusion. Age is the major risk factor for carotid atherosclerosis in the elderly. In other words, the occurrence of carotid atherosclerosis is the result of advancing age combined with the effect of multiple cardiovascular risk factors.
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Fast Growth of Eucommia Antifungal Protein(EAFP) Crystals Observed by Atomic Force Microscopy
The eucommia antifungal protein (briefly named as EAFP) is an antifungal protein extracted from the barkes of the eucommia ulmoides Oliv[1]. It is involved in the defense mechanism of plants and plays an important role against the pathogenic attacks. EAFP has 41 residues distinctly with five disulfide bridges. It has been crystallized in a monoclinic form( P21 ) with the unit cell parameters a = 19. 085, b = 23. 225, c = 30. 854?, β = 98.64[2]. EAFP crystals grow much faster than most of other macromolecular crystals. It takes only several hours to grow perfect crystals big enough for x - ray diffraction at very high resolution( about 0.8?). Therefore it is very interesting to know the mechanism of the fast growth process of EAFP crystals.Here we report step growth rates measured from images by in situ Atomic Force Microscopy(AFM).
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肺部弥漫性病变的高分辨率CT诊断
肺部弥漫性病变(diffuse lung disease,DLD)是较为复杂的一组病变总称,其广泛累及肺实质和(或)间质,以后者为主.