Biological traits and life table parameters A and B biotype of Bemisia tabaci (Genn.) on cotton and rapeseed

The aim of this work was to construct life table of Bemisia tabaci (Gen.) A and B (silverleaf whitefly B. argentifolii Bellows and Perring) biotype (Hem.: Aleyrodidae) on two host plants; cotton, (Gossypium hirsutum L.) and rapeseed, (Brassica napus L.). Experiments were conducted in a growth chamber under 24 ± 2ºC, 55±3% RH and 16:8 (L:D) h photoperiod on caged plants of cotton G. hirsutum L. (Varamin 76 variety) and rapeseed B. napus L. (global variety. The intrinsic rate of natural increase (rm), net reproductive rate (R0) and mean generation time (T) for B. tabaci A biotype was 0.1010 females per female per day, 18.4075 females per female and 30.079 day (d) on cotton; 0.1286, 30.6760 and 26.77 d on rapeseed; and for B biotype (B. argentifolii) those above respective parameters averaged 0.1033, 27.8426 and 32.74 d on cotton and 0.1750, 40.75 and 21.27 d on rapeseed. The total survival of A and B biotype from the egg to adult on cotton was 22.08 and 22.25, respectively. The results showed significant differences between the two biotype reared on either host plant for gross reproductive rate (GRR), net reproductive rate (R0 or NRR), intrinsic rates of increase (rm), finite rate of increase (λ), doubling time (DT) and mean generation times (Tc). To obtain a better understanding of the biology of these biotypes, Stable age distribution (Cx) and some other aspects of life history related to their hosts were also studied. Based upon the results, both biotypes showed a greater reproduction capacity on rapeseed than on cotton. Thus, rapeseed was more suitable host than cotton for two biotypes and this was an important factor in host plant selection for optimizing the control strategies of these major pests.Mohammad Amin Samih, Mehdi Zarabi, Maryam Yazdani and Mohammad Rouhani

Storing, caring and sharing : examining organisational practices around material stuff in the home

Homes are a much discussed, but little empirically examined resource for action. Material stuff at home offer resources for social, organisational and individual activities that we routinely encounter and use on an everyday basis. Yet their purposes, storing and sharing practices of use and roles in social and organisational actions are hardly touched upon within Human Computer Interaction (HCI) and Computer Supported Cooperative Work (CSCW) academic literature. As a consequence of this, there are critical gaps in understanding home organisation and management methods as a means of informing the design of novel technologies. This thesis is an examination of everyday routines in home, paying particular attention to tidying, storing, retrieving and sharing practices. To examine these practices at home, this thesis presents a combination of two qualitative studies using ethnographically oriented methods. Study one (Home’s Tidying up, Storing and Retrieving) concerns the topic of home storage in practice; investigating how householders create and use domestic storage practices and the methods used to manage their storage at home. Study two (Social Interaction around Shared Resources) concerns social interaction around shared resources, and the methods used to manage sharing practices at home. Semi-structured interviews, fieldwork observation, tour around a home, and a photo diary were undertaken to produce a ‘rich’ description of how householders collaborate in storing and sharing set of practices to manage their everyday routines. Several key finding emerged from the research, that are used to identify important implications for design of home organisational technologies, for example to support effective lightweight interactions, providing user controlled mechanism to make different levels of privacy protection for family members, offering effective awareness of family communications and notifications of the activities of other people around these organisation systems, and making available a range of flexible options for family members to access a shared resource. The thesis make the case that flexible systems should be designed allowing people to categorise things in different ways, and have the values of home asserted in technologies, considering factors such as emotion around the use of space in home organisation to make homes become the unique places that they are understood to be.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Adult urinary bladder tumors with rabdomyosarcomatous differentiation: Clinical, pathological and immunohistochemical studies

Adult rhabdomyosarcoma (RMS) in the urinary bladder is rare, and is the subject of case reports and small series. It consists of sheets of small round blue cells with high nuclear cytoplasmic ratio, brisk mitosis and apoptosis. In this study, we reported one case of pure rhabdomyosarcoma and two cases of urothelial carcinomas with extensive rhabdomyosarcomatous differentiation. In addition, their immunohistochemical profile was compared to that of small cell carcinoma of the bladder. Our study showed that sufficient sampling was critical for the diagnosis of urothelial carcinoma with extensive rhabdomyosarcomatous differentiation. As adult RMS in the bladder and urothelial carcinoma with rhabdomyosarcomatous differentiation shared morphological features with small cell carcinoma of the bladder, appropriate immunohistochemical stains were necessary in the differential diagnosis. We showed both rhabdomyosarcoma and rhabdomyosarcomatous areas of the urothelial carcinoma were positive for myogenin, negative for cytokeratin and chromogranin stains. In contrast, small cell carcinoma was positive for cytokeratin, and 7 out of 9 cases were also positive for chromogranin. Both rhabdomyosarcoma and small cell carcinoma could be positive for synaptophysin, a potential pitfall to avoid. In addition, all of the tumors with rhabdomyosarcomatous differentiation were negative for FKHR rearrangement

Absolutely continuous invariant measures for random non-uniformly expanding maps

We prove existence of (at most denumerable many) absolutely continuous invariant probability measures for random one-dimensional dynamical systems with asymptotic expansion. If the rate of expansion (Lyapunov exponents) is bounded away from zero, we obtain finitely many ergodic absolutely continuous invariant probability measures, describing the asymptotics of almost every point. We also prove a similar result for higher-dimensional random non-uniformly expanding dynamical systems. The results are consequences of the construction of such measures for skew-products with essentially arbitrary base dynamics and asymptotic expansion along the fibers. In both cases our method deals with either critical or singular points for the random maps.Comment: 30 pages; 2 figures. Keywords: non-uniform expansion, random dynamics, slow recurrence, singular and critical set, absolutely continuous invariant measures, skew-product. To appear in Math Z, 201

Amygdala circuitry mediating reversible and bidirectional control of anxiety

Anxiety—a sustained state of heightened apprehension in the absence of immediate threat—becomes severely debilitating in disease states. Anxiety disorders represent the most common of psychiatric diseases (28% lifetime prevalence) and contribute to the aetiology of major depression and substance abuse. Although it has been proposed that the amygdala, a brain region important for emotional processing, has a role in anxiety, the neural mechanisms that control anxiety remain unclear. Here we explore the neural circuits underlying anxiety-related behaviours by using optogenetics with two-photon microscopy, anxiety assays in freely moving mice, and electrophysiology. With the capability of optogenetics to control not only cell types but also specific connections between cells, we observed that temporally precise optogenetic stimulation of basolateral amygdala (BLA) terminals in the central nucleus of the amygdala (CeA)—achieved by viral transduction of the BLA with a codon-optimized channelrhodopsin followed by restricted illumination in the downstream CeA—exerted an acute, reversible anxiolytic effect. Conversely, selective optogenetic inhibition of the same projection with a third-generation halorhodopsin (eNpHR3.0) increased anxiety-related behaviours. Importantly, these effects were not observed with direct optogenetic control of BLA somata, possibly owing to recruitment of antagonistic downstream structures. Together, these results implicate specific BLA–CeA projections as critical circuit elements for acute anxiety control in the mammalian brain, and demonstrate the importance of optogenetically targeting defined projections, beyond simply targeting cell types, in the study of circuit function relevant to neuropsychiatric disease

The Effect of Mummy on Some Indices of Wound Healing in Mice

Abstract: Introduction: Mummy was used in traditional medicine as a remedy for inflammation, articular injuries, rheumatism, bone fractures, wounds, and back pains. In a previous research, the healing effects of mummy on rabbit’s tibial fracture were studied and the results approved its efficacy. Considering some natives’ claim and suggestions of traditional medicine in regard to the effectiveness of mummy on wound healing, the present study was aimed to investigate the effects of mummy on some healing indices of wound. Method: In this experimental study performed on 56 mice, a vertical incision on the back of mice cutting through the complete thickness of skin was performed. The test groups (mummy), and the control groups (normal saline), were compared for some tissue indices of wound healing and the amount of tension needed to tear the cut by using the tensiometer after 3,7,14 , and 21 days. Results: Although the average tissue indices of wound healing differed in test and control groups, these differences were not statistically significant. The average of the tensions needed to tear the healed wound in test groups was significantly greater than that in the control groups. Conclusion: The difference between mean number of histological variables and mean necessary tension to tear open the healed wound between the test and control groups indicated the effectiveness of mummy in tensile stretch of wound healing process but its negligible effectiveness on histological indices of wound healing. Keywords: Mummy, Wound healing, Healing indices, Tensile stretch, Histopatholog

Dispenser ion emitters

The development of a dispenser type of ion emitter is described. This type of ion emitter has been used successfully for obtaining lead, aluminum, and tin ions

Role of silicon carbide/mercury interface in ignitrons

A new model of ignition in an ignitron, based on the electrical breakdown of the junction between the ignitor (semiconductor) and the mercury (metal) is proposed. A method of evaluating some of the ignition characteristics is also developed. The paper gives a critical summary of the various characteristics of the ignition process. The new model is stated and used to explain all the ignition characteristics. The experiments conducted in support of the various aspects of this model are also given