Altered white matter integrity in individuals with cognitive vulnerability to depression: a tract-based spatial statistics study

The microstructure of white matter in patients with major depressive disorder (MDD) has been demonstrated to be abnormal. However, it remains unclear whether these changes exist prior to the onset of disease. In this study, diffusion tensor imaging was used to evaluate white matter integrity in individuals who exhibited cognitive vulnerability to depression (CVD), MDD, and healthy controls (HC). Compared with the HC, MDD exhibited a lower fractional anisotropy (FA) in ten brain regions: the cerebral peduncle, the anterior and posterior limbs of the internal capsule (ALIC and PLIC), the external capsule, the retrolenticular part of the internal capsule (RLIC), the body and splenium of the corpus callosum, the superior and posterior corona radiata, and the cingulum. Moreover, CVD had significantly lower FA in the ALIC, the PLIC, the external capsule, the RLIC, the cerebral peduncle, and the superior corona radiata than did the HC. However, the white matter integrity was not significantly different between the CVD and MDD. These preliminary results indicate that alterations in the white matter observed in CVD may be a marker of vulnerability to MDD and that these alterations may exist prior to the onset of depression

A new method of improving height accuracy of airborne photogrammetry using a multi-camera system

Height accuracy is one of the most important requirements of stereo mapping. In order to improve the height accuracy of airborne photogrammetry, a new method using a multi-camera system was developed. This method collects multiple groups of stereo images with 60% overlap between adjacent stations, and with 90% overlap between simultaneous images. In this way, redundant stereo images are acquired to improve the height accuracy of ground points. This paper presents the principle of this method and a validation experiment conduced in the geometric test field in Hebei province, China The experimental results reveal that the height accuracy of a four-camera system is better than result of a single camera. Therefore, the proposed method provides a new way for improving the height accuracy of airborne photogrammetry.Engineering, Electrical & ElectronicGeosciences, MultidisciplinaryRemote SensingEICPCI-S(ISTP)

Applied behavior analytic intervention services for children with autism spectrum disorders: an investigation of Chinese parents

IntroductionApplied behavior analysis (ABA)-based interventions have been used worldwide for several decades to improve socially significant behaviors of individuals with autism. However, as the utilization of the ABA-based interventions in the Chinese mainland is relatively new, it remains unclear about some fundamental aspects of using these interventions in this region.MethodThis study investigated the use of ABA-based interventions in Beijing and surrounding areas by using a quantitative survey (N = 85) and a qualitative semi-structured interview (N = 10) to collect data from parents of children with autism.ResultsThis study found that (a) the ABA-based intervention service was the most popular one chosen by parents, and the majority of these parents reported improvements in children’s behaviors and gave positive evaluations for the work of professionals; (b) this service was mainly delivered at autism organizations (i.e. autism clinics/schools) or children’s homes, but rarely used in mainstream school settings; (c) the high cost of ABA interventions was a financial burden for families; and (d) a high proportion of parents were involved in interventions as assistant therapists. Furthermore, some aspects of the use of this service varied with families’ socioeconomic levels. The qualitative interviews expounded upon motivations for parents’ choices and evaluations for this service.ConclusionThese findings provided valuable insights for service providers, policymakers, and researchers to optimize ABA-based intervention services for Chinese children with autism

Application of Molecular Marker Technology in the Study of Forest Tree Species

Due to its unique advantages, molecular marker technology is widely applied in the research of forest tree species. This paper reviewed the application of molecular marker technology in tree species resource diversity, germplasm identification, genetic map construction, gene mapping and marker-assisted selection (MAS) breeding. In addition, it elaborated the great significance of molecular marker technology to promote the sustainable development of forestry production in China

Morphological and genetic differences in legs of a polygamous beetle between sexes, Glenea cantor (Coleopter: Cerambycidae: Lamiinae).

The legs of insects play an important role in their daily behaviour, especially reproduction. Entomologists have performed much research on the role of the leg in different behaviours of beetles, an important group in the insect family, but relatively little has been done to study the ultrastructure and transcriptome of their legs. Hence, we systematically studied the ultrastructure and gene expression of the leg of G. cantor, a polygynous beetle, and compared its male and female diversity. In this study, we found the fore-leg, mid-leg and hind-leg of the female were significantly longer than those of the male. From the perspective of intuitive structural differences, we also compared the ultrastructures of the adhesion structure (tarsal) of males and females. The tarsal functional structure of the adult leg mainly includes sensilla and an adhesion structure. The sensilla on the tarsal joint mainly include sensilla chaetica (SCh II, SCh III) and sensilla trichodea (ST II). The adhesion structure includes disc-shaped bristles (di), lanceolate bristles (la), serrated bristles (se), spatula-shaped bristles (spl) and mushroom-shaped bristles (mus). Although there was no significant difference in sensillum distribution or type between males and females, there were significant differences in the distribution and species of adhesion structures between the fore-leg, mid-leg, and hind-leg of the same sex and between males and females. Therefore, different adhesion structures play different roles in various behaviours of beetles. On the other hand, the transcriptome results of male and female legs were screened for a subset of olfaction- and mechanics-related genes. We discovered that the male leg showed upregulation of 1 odorant binding protein (OBP), 2 Olfactory receptors (ORs) and 2 Chemosensory proteins (CSPs). Meanwhile, the female leg showed upregulation of 3 OBPs, 1 OR, 1 Gustatory receptor (GR) and 3 Mechanosensitive proteins (MSPs). An in-depth examination of the ultrastructure and molecular composition of the legs can elucidate its function in the reproductive behavior of G. cantor. Moremore, this investigation will serve as a cornerstone for subsequent research into the underlying behavioral mechanisms

Carbon Dots Derived from the Maillard Reaction for pH Sensors and Cr (VI) Detection

The Maillard reaction involves a series of complex reactions; fluorescent compounds have been considered as vital intermediate products of the reaction. In this article, carbon dots (CDs) based on the Maillard reaction (MR-CDs) were prepared with L-tryptophan and D-glucose, and they had excellent photoluminescence stability. MR-CDs showed stable pH-dependence behavior and exhibited an excellent linear response to pH in the range of 4.0–7.5 and 7.5–13.0, respectively. Under the masking effect of sodium fluoride for Fe(III), MR-CDs showed excellent selectivity and sensitivity for Cr (VI). The linear range of Cr(VI) was 0.2–50 μM and the limit of detection was 20 nM. (S/N ≥ 3). Furthermore, MR-CDs were used to detect Cr(VI) in tap water samples. The recoveries were between 95.8% and 98.94%, and RSDs were less than 3.17%

Polystyrene Nanoplastics-Enhanced Contaminant Transport: Role of Irreversible Adsorption in Glassy Polymeric Domain

Nanoplastics (NPs) are becoming an emerging pollutant of global concern. A potential risk is that NPs may serve as carriers to increase the spreading of coexisting contaminants. In this study, we examined the effects of polystyrene nanoplastics (PSNPs, 100 nm), used as a model NP, on the transport of five organic contaminants of different polarity in saturated soil. The presence of low concentrations of PSNPs significantly enhanced the transport of nonpolar (pyrene) and weakly polar (2,2′,4,4′-tetrabromodiphenyl ether) compounds, but had essentially no effects on the transport of three polar compounds (bisphenol A, bisphenol F, and 4-nonylphenol). The strikingly different effects of NPs on the transport of nonpolar/weakly polar versus polar contaminants could not be explained with different adsorption affinities, but was consistent with the polarity-dependent extents of desorption hysteresis. Notably, desorption hysteresis was only observed for nonpolar/weakly polar contaminants, likely because nonpolar compounds tended to adsorb in the inner matrices of glassy polymeric structure of polystyrene (resulting in physical entrapment of adsorbates), whereas polar compounds favored surface adsorption. This hypothesis was verified with supplemental adsorption and desorption experiments of pyrene and 4-nonylphenol using a dense, glassy polystyrene polymer and a flexible, rubbery polyethylene polymer. Overall, the findings of this study underscore the potentially significant environmental implication of NPs as contaminant carriers

Ultrastructure of the tarsus of the hind-leg of adult <i>G</i>. <i>cantor</i>.

A, Lateral view of the tarsus of the hind-leg of a female; B, Venter view of the 3rd tarsus of the hind-leg of a female; C, Lateral view of the 1st tarsus of the hind-leg of a female; D, The femur of the hind-leg of a female; E, Lateral view of the tarsus of the hind-leg of a male; F, A discoid bristle on the 3rd tarsus of the hind-leg of a male; G, The junction of the 2nd-3rd tarsi of the hind-leg of a male; H, The femur of the hind-leg of a male. Scale bars: A, E, H = 500 μm; D, a = 300 μm; e = 100 μm; B, C, F, G = 50 μm; f = 10 μm.</p