Synthesis of Nanostructured sawdust-BF3: An efficient reagent for synthesis of 2,3,5-substituted-2H-pyrazole derivatives

Nanostructured sawdust-BF3 has been prepared and shown to efficiently catalyse the one-pot reaction of 1,3-diketones and hydrazines under solvent-free conditions, to afford the corresponding 2,3,5-substituted-2H-pyrazole derivatives in excellent yields

Synthesis of spirooxindoles with three component reaction between β-ketoesters, malononitrile and isatin derivatives in the presence of Alum.SiO2 nanoparticles as a new nano catalyst

In this reseaech, some of the spirooxindole derivaties were prepared via β-ketoesters, malonoitrile and isatin derivatives in the presenceAlum.SiO2 NPs as an effective, recyclable and inexpensive catalyst. The products were identified by IR, 1HNMR, 13C NMR spectr a, andmelting point. The size of nanoparticles characterized by SEM and TEM techniques. A novel multicomponent synthesis of a series ofspirooxindol derivatives is described. The procedures was carried out applying Alum/SiO2 supported on NPS as the novel cataly st givingrise to high to excellent yielded synthetic route of spirooxindol compounds. The major advantages of this protocol are short reaction time,good yields , simple procedure work up as well as friendly synthesis. In this work, some of the spirooxindole derivaties wer e prepared via β-ketoesters, malononitrile and isatin derivatives in the presence Alum.SiO2 NPs as an effective, recyclable and inexpensive catalyst. Theproducts were identified by IR,1HNMR,13CNMR spectra, and melting point. The size of nanoparticles characterized by SEM and TEMtechniques.(scheme 1

Synthesis of spirooxindoles with three component reaction between β-ketoesters, malononitrile and isatin derivatives in the presence of Alum.SiO2 nanoparticles as a new nano catalyst

In this reseaech, some of the spirooxindole derivaties were prepared via β-ketoesters, malonoitrile and isatin derivatives in the presenceAlum.SiO2 NPs as an effective, recyclable and inexpensive catalyst. The products were identified by IR, 1HNMR, 13C NMR spectr a, andmelting point. The size of nanoparticles characterized by SEM and TEM techniques. A novel multicomponent synthesis of a series ofspirooxindol derivatives is described. The procedures was carried out applying Alum/SiO2 supported on NPS as the novel cataly st givingrise to high to excellent yielded synthetic route of spirooxindol compounds. The major advantages of this protocol are short reaction time,good yields , simple procedure work up as well as friendly synthesis. In this work, some of the spirooxindole derivaties wer e prepared via β-ketoesters, malononitrile and isatin derivatives in the presence Alum.SiO2 NPs as an effective, recyclable and inexpensive catalyst. Theproducts were identified by IR,1HNMR,13CNMR spectra, and melting point. The size of nanoparticles characterized by SEM and TEMtechniques.(scheme 1

The immediate effects of pelvic compression belt with a textured sacral pad on the sacroiliac function in pregnant women with lumbopelvic pain: A cross-over study

Background: Pelvic belt is being used to alleviate the symptoms of lumbopelvic pain. Objective: To investigate the immediate effects of a pelvic belt with a textured sacral pad in pregnant women with lumbopelvic pain. Methods: Twenty-eight pregnant women participated in a randomized crossover study. Hip joint position sense, maximum hip flexion force, and perceived effort during the active straight leg raising test were measured in twenty-eight pregnant women with lumbopelvic pain. Outcomes were measured in three randomized conditions including no pelvic belt (control), with a pelvic belt, and while a sacral pad was used with the pelvic belt. Data were analyzed using a one-way repeated measures analysis of variance for each variable. Results: Improvements in all study outcomes have been shown with a pelvic belt compared with the control condition. The addition of a textured sacral pad to the pelvic belt improved all study outcomes compared with the pelvic belt: hip joint position sense (p <0.001; 95% confidence interval:1.3to2.3), perceived effort (p ¼0.003; 95% confidence interval: 0.35 to 1.86), and maximum flexion force (p <0.001; 95% confidence inter-val:2.77to6.47) in the active straight leg raising. Conclusion: Further improvements were noted with the addition of the textured pad for all outcome measures. This finding may inform new benefits in adding a textured sacral pad to pelvic compression belts

Evaluation of In-vitro Antimicrobial Activity of some Newly Synthe-sized2-amino-3-phenylsulfonyl-4-aryl-4H-benzo[h]chromens Derivatives

In this study, some chromens derivatives were synthesized as mentioned in our previous report.The synthesized compounds were evaluated for their antibacterial effect against three different bacterial species, using Disk Diffusion Agar test and microdilution broth (MIC) method against the S. aureus, E. coli, P. aeruginosabacterias according to the National Committee for Clinical Laboratory Standards (NCCLS) recommendations. The results indicated that 4-nitro compound has considerable antibacterial activity against S. aureusbacteria. Moreover, compound 3-chloro has antibacterial properties  againstE. coli standard strain and none of 4H-Chromens derivatives have antibacterial effect on P. aeruginosa  strains

Dissociative Symptoms and Self-Reported Childhood and Current Trauma in Male Incarcerated People with Borderline Personality Disorder - Results from a Small Cross-Sectional Study in Iran

There is evidence that incarcerated people show higher rates of symptoms of psychopathology. In the present study, we assessed male Iranian incarcerated people with borderline personality disorders (BPD) and investigated the occurrence of past and current trauma and their associations with dissociative experiences.; A total of 69 male Iranian incarcerated people (mean age: 33.76 years) diagnosed with PBD completed questionnaires covering sociodemographic information, dissociative experiences, and past and current traumatic events.; Participants reporting the occurrence of childhood trauma also reported the occurrence of adulthood trauma. Dissociation and adulthood trauma were associated in a U-shaped, non-linear fashion: Low and high adulthood trauma were associated with higher dissociation. Younger age, the presence of childhood trauma, and being single or divorced predicted adulthood trauma.; The pattern of results suggests that both childhood and adulthood trauma are highly prevalent among male incarcerated people, while the association between adulthood trauma and dissociation appeared to be more complex. When treating male incarcerated people, a complex interplay between past and current traumas and dissociation should be considered

Architecture and Algorithms for Scalable Mobile QoS

Masters ThesisWe develop a simple analytical model to study the system and illustrate several key components of the approach. We formulate the problem of how to group the cells to form the virtual system as an optimization problem and propose a heuristic adaptive clustering algorithm as its solution. Finally, we perform simulations in a two-dimensional network to compare the performance obtained with VBC and adaptive clustering with alternate schemes, including the optimal offline algorithm

MAC for real-time applications over random-access time-varying channels

This thesis introduces mechanisms for support of real-time applications in high-density random-access networks. Random-access Wireless LANs are increasingly being used to support real-time applications such as voice over IP. Providing service to real-time applications requires not only efficient utilization of the scarce physical resource, i.e., bandwidth, but also incorporation of precise knowledge of network parameters and characteristics in mechanisms for proper dimensioning and/or admission control. The contribution of this thesis is two fold. First, Opportunistic Auto Rate (OAR), a multi-rate media access protocol, is devised which exploits the inherent variations in channel conditions to increase the throughput while maintaining long-term temporal fairness. The key mechanism of the OAR protocol is to opportunistically send multiple back-to-back data packets whenever the channel quality is good. As channel coherence time typically exceeds multiple packet transmission times for both mobile and non-mobile users, OAR achieves significant throughput gains as compared to state-of-the-art auto-rate adaptation mechanisms. Moreover, over longer time scales, OAR ensures that all nodes are granted channel access for the same time-shares as achieved by single-rate IEEE 802.11. The thesis describes mechanisms to implement OAR on top of any existing auto-rate adaptation scheme in a nearly IEEE 802.11 compliant manner. It also analytically studies OAR and characterizes its gains in throughput as a function of the channel condition. An extensive set of ns-2 simulations is performed to study the impact of such factors as node velocity and channel conditions on the throughput of OAR. Second, the thesis presents a delay analysis of CSMA/CA that yields the media access delay distribution of a multi-rate system as a function of key performance factors such as network load and channel condition. The model is developed under assumption of fixed probability of collision in the network. The accuracy of the model is validated by comparing the numerical results with those obtained via ns-2 simulations. By linear approximation of the computed distribution over the small-delay regime, a computationally simple result applicable to on-line admission control is achieved. This admission control mechanism along with the devised opportunistic multi-rate MAC protocol enables support of real-time applications in the CSMA/CA networks