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Developing flexible and scalable methods for controlled assembly of nanomaterials remains a critical challenge in nanotechnology. In this article, we review the progress in assembly of nanostructures with a focus on the recently reported method utilizing a bubble expansion process to align one-dimensional nanostructures embedded in blown bubble films. This approach is general and enables efficient assembly of a variety of nanomaterials over large areas on both rigid and flexible substrates, with good control on the orientation and density. The basic blown bubble film process, generality, mechanism, unique characteristics, and potential applications are discussed.
Ultra hCG device capable of detecting physiologically relevant concentrations of hCGcf, ultimately reducing the likelihood of false-negative results.However, it is disturbing that the other 2 OSOM devices (OSOM Combo and OSOM Card) are still marketed for use.The package inserts of the OSOM Combo and OSOM Card devices state: "This assay is capable of detecting only whole molecule (intact) hCG, which is the predominant form of hCG in early pregnancy.It cannot detect the presence of hCG fragments or free subunits.In later term pregnancies (generally beyond the first trimester), occasionally urine samples can contain very high levels of hCG fragments.Therefore, the OSOM Pregnancy test is most effective when used for the detection of pregnancy in earlier stages."However, concentrations of hCGcf are known to be increased as early as week 7 of pregnancy (3 ), and there is no warning about the potential for false-negative results because of high hCGcf, only that these fragments will not be detected.We applaud the manufacturer for the addition of the OSOM Ultra device to its menu.However, we urge the manufacturer to either remove the other devices from the market or include cautionary information about the potential for false-negative results in women beyond 7 weeks of gestation.
Background: It has been suggested earlier that parental loss could be an important risk factor for alcoholism in adulthood. We e‐plored the association between different types of childhood families with later alcohol‐related problems of the offspring, in particular drunk driving. Methods: We used a large, prospectively collected general population birth cohort database ( n = 10,934), the Northern Finland 1966 Birth Cohort. Linked with the National crime register, it provided information on drunk driving offenses known to the police that involved persons 15 to 32 years of age ( n = 432). Type of family was categorized into five subgroups: two‐parent family and four types of single‐parent families (single‐parent all the time, single‐parent at birth, parental death, parental divorce). The information about family type was obtained from questionnaires given to the mothers during mid‐pregnancy and at the time of the 14‐year follow‐up. Results: Single‐parent family during childhood significantly increased the risk of drunk driving in adulthood among both males and females. Males who were born in single‐mother families were at the highest risk of drunk driving offenses in adulthood (adjusted OR 2.4; 95% CI 1.4–4.2). The association between single‐parent family and drunk driving among males was seen in all types of single‐parent families e‐cept for parental death. Conclusions: Results suggest that growing up in a single‐parent family is a potentially powerful predictor of adult alcohol‐related problems, i.e., early‐onset, late‐onset, and recidivistic drunk driving.
No abstract is provided for this article.
Abstract The interfacial properties of organic materials are of critical importance in many applications, especially the control of wettability, adhesion, tribology, and corrosion. The relationships between the microscopic structure of an organic surface and its macroscopic physical properties are, however, only poorly understood. This short review presents a model system that has the ease of preparation and the structural definition required to provide a firm understanding of interfacial phenomena. Long‐chain thiols, HS(CH 2 ) n X, adsorb from solution onto gold and form densely packed, oriented monolayers. By varying the terminal functional group, X, of the thiol, organic surfaces can be created having a wide range of structures and properties. More, complex systems can be constructed by coadsorbing two or more thiols with different terminal functional groups or with different chain lengths onto a common gold substrate. By these techniques, controlled degrees of disorder can be introduced into model surfaces. We have used these systems to explore the relationships between the microscopic structure of the monolayers on a molecular and supramolecular scale and their macroscopic properties. Wettability is a macroscopic interfacial property that has proven of particular interest.