میلاد با سعادت امام علی (ع)

میلاد با سعادت مولای متقیان علی (ع) و روز پدر را به تمام پدران و مردان تبریک و تهنیت عرض می کنیم
Dilemma between economic development and energy conservation Energy[]

Dilemma between economic development and energy conservation: Energy rebound effect in China

Promoting technological development to improve energy efficiency has been the primary method of energy conservation in China. However, the existence of energy rebound effect will impose negative effects on the final result of energy saving. In this article, we adopt the Malmquist index approach to estimate the contribution of technological progress to economic growth. We also employ Logarithmic mean weight Divisia index (LMDI) to measure the impact of technological improvement on the energy intensity. Based on the above, we set up a model to estimate the technology-based energy rebound effect in China. The results show that, over 1981e2009, energy rebound effect amounts averagely to 53.2%, implying that China cannot simply rely on technical means to reduce energy consumption and emission. Economic instruments should also be applied as supplements to ensure results of energy conservation and emission reduction
Dry reforming of CH4 over solid solutions of LaNi1xCoxO3[]

Dry reforming of CH4 over solid solutions of LaNi1xCoxO3

LaNi1xCoxO3 perovskite-type oxides were synthesized by the sol–gel resin method and used as catalysts precursors in the dry reforming of methane to syngas between 600 and 800 8C at atmospheric pressure, the reaction was studied under continuous flow using an mixture of CH4:CO2 = 1:1. The solids were characterized by X-ray diffraction (XRD), BET specific surface area and temperature-programmed reduction (TPR). XRD analysis of the solids shows LaNiO3 and/or LaCoO3 as the main phases present on the solids depending on the degree of substitution. The more intense peaks and cell parameters showed formation of Ni-Co solid solutions. The as-synthesized solids were reduce during catalytic tests to form Ni0, Co0 and La2O2CO3 as the active phases which remain during the reaction and are responsible for the high activity shown by the solids inhibiting carbon formation, with CH4 and CO2 equilibrium conversions near 100%, except for LaCoO3 that showed a poor activity
From Nanotechnology to Nanomedicine Applications to Cancer[]

From Nanotechnology to Nanomedicine: Applications to Cancer Research

Scientific advances have significantly improved the practice of medicine by providing objective and quantitative means for exploring the human body and disease states. These innovative technologies have already profoundly improved disease detection, imaging, treatment and patient follow-up. Today’s analytical limits are at the nanoscale level (one-billionth of a meter) enabling a detailed exploration at the level of DNA, RNA, proteins and metabolites which are in fact nano-objects. This translational review aims at integrating some recent advances from micro- and nano-technologies with high potential for improving daily oncology practice
Alzheimer's disease synaptic dysfunction and Aβ[]

Alzheimer's disease: synaptic dysfunction and Aβ

Synapse loss is an early and invariant feature of Alzheimer's disease (AD) and there is a strong correlation between the extent of synapse loss and the severity of dementia. Accordingly, it has been proposed that synapse loss underlies the memory impairment evident in the early phase of AD and that since plasticity is important for neuronal viability, persistent disruption of plasticity may account for the frank cell loss typical of later phases of the disease. Extensive multi-disciplinary research has implicated the amyloid β-protein (Aβ) in the aetiology of AD and here we review the evidence that non-fibrillar soluble forms of Aβ are mediators of synaptic compromise. We also discuss the possible mechanisms of Aβ synaptotoxicity and potential targets for therapeutic intervention

تبریک سال نو

باسلام و احترامنوروز سال 1397 را به همه ی مردم ایران زمین و علی الخصوص همراهان سایت تعلیم تبریک و تهنیت عرض می کنیم . امیدواریم در سال جدید سرویس های بهتری بتوانیم ارائه بدهیم و کماکان از همراهی شما عزیزان سپاسگزاریم.…
Developing Maximal Neuromuscular[]

Developing Maximal Neuromuscular Power

This series of reviews focuses on the most important neuromuscular function in many sport performances: the ability to generate maximal muscular power
Growth Hormone and Bone[]

Auxiliary-Carrier Load-Shift Keying for Reverse Data Telemetry from Biomedical Implants

This paper introduces a new approach for data telemetry from biomedical implantable devices to the external world (also known as reverse data telemetry). In the proposed approach, while power (and perhaps data) is transferred to the implant using a main carrier, a second carrier is also sent to the implant through the same link. The second carrier, which is of higher frequency and smaller amplitude, is envisioned for reverse data telemetry by load-shift keying. In this work, the wireless link is realized with two resonant frequencies using closely-coupled printed spiral coils and LC matching networks. The main and auxiliary carrier frequencies are 1MHz and 10MHz with 5V and 1V peak amplitudes, respectively. While the link is capable of continuously supplying unregulated power of up to 80mW at 4V(peak) to a 100-Ω resistive load, data telemetry at a rate of 100 kbps is successfully tested in the reverse direction
Growth Hormone and Bone[]

Growth Hormone and Bone

GH AFFECTS several tissues including liver, muscle, kidney, and bone. GH effects on muscle and kidney have recently been extensively reviewed in Endocrine Reviews by Florini et al. (1) and Feld and Hirschberg (2). Since GH has important effects on skeletal tissues, our focus in this article will be on our current understanding of GH effects on bone. A large increase in bone mass occurs during childhood and puberty via endochondral bone formation. A gradual increase in bone mass is then seen until peak bone mass is reached at 20–30 yr of age. Subsequently, bone mass decreases with an accelerated bone loss seen in females after menopause. Bone remodeling is regulated by a balance between bone resorption and bone formation. In this process GH is known to play a role (3–7). A net gain of skeletal mass due to new bone formation caused by GH was first shownin adult mongrel dogs (8). After treatment with GH for 3 months a 2% increase in cortical bone mass, as assessed by histomorphometry, was found

Psoriasis: Evolving treatment for a complex disease

The cutaneous manifestations of psoriasis can vary in morphology and severity, and therapy should be tailored accordingly. Biologic agents are important new options for treating patients with the most severe forms of the disease. All physicians should be aware that severe psoriasis may increase cardiovascular morbidity and the risk of death, and preventive strategies for patients with severe disease should be considered