نتایج جستجو برای: natural depletion
تعداد نتایج: 540977 فیلتر نتایج به سال:
Naturally fractured carbonate reservoirs (NFCRs) comprise the majority of the oil and gas reservoirs around the Persian Gulf. Many of these reservoirs have a long history of exploitation, but vast amounts of oil remain in place. A major redevelopment process for light oil based NFRs will likely be the use of horizontal wells combined with gravity drainage at constant pressure based on voidage...
Tumor-infiltrating myeloid-derived suppressor cells (MDSC) are a heterogeneous and immunosuppressive cell subset that blocks the proliferation and the activity of both T and natural killer (NK) cells and promotes tumor vasculogenesis and progression. Recent evidences demonstrate that the recruitment of MDSCs in tumors also blocks senescence induced by chemotherapy promoting chemoresistance. Hen...
O'-Alkylguanine-DNA alkyltransferase (ATase) levels were measured in peripheral blood lymphocytes of 13 patients with advanced malignant melanoma treated with sequential dacarbazine (DTIC) and fotemustine. \Yide interindividual variation in the pretreatment levels and in depletion and regeneration of ATase activity was noted. Depletion of ATase was seen within the first h after DTIC administrat...
This paper attempts to provide a unified framework that takes into account various aspects of the oil and natural gas exploratory process such as the depletion of the resource base with time, uncertainty in drilling, changing economic incentives and the joint product aspects of the oil and gas exploration. The equilibrium in the market for oil and natural gas prospects is first described and th...
Introduction Protein–energy malnutrition (PEM) can be defined as the state of decreased body pools of protein with or without fat depletion that is caused at least in part by inadequate nutrient intake relative to nutrient demand that is needed to ensure growth and maintenance [1,2]. Protein energy malnutrition affects approximately one third of children worldwide and is frequently located in l...
Several reports have shown that prophylactic depletion of regulatory T cells (Treg) using various monoclonal antibodies (mAb) in mice can stimulate potent antitumor immune responses and prevent tumor development. These same depletion methods do not significantly suppress tumor growth in a therapeutic setting. Although different strategies to deplete FoxP3(+) Treg have been used, no study has sy...
The risk of resource depletion for future generations humanity is often cited as an important issue. choice impact categories and characterization models extraction in LCA no more precise than other models. This means that discussion needed on the use resources. In this article, potential Boron minerals (Colemanite, Ulexite, Tincal) are studied. These have a big role world Turkey; however, limi...
Anti-CD20 antibody immunotherapy effectively treats non-Hodgkin's lymphoma and autoimmune disease. However, the cellular and molecular pathways for B cell depletion remain undefined because human mechanistic studies are limited. Proposed mechanisms include antibody-, effector cell-, and complement-dependent cytotoxicity, the disruption of CD20 signaling pathways, and the induction of apoptosis....
In recent years the household compressor manufacturers have reduced the energy losses inside the compressors resulting in a positive effect on the energy consumption in the cabinets. In the following, N-butane, which is a natural and non ozone depletion refrigerant, is compared to refrigerants presently used in household compressors.
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