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تعداد نتایج: 9529700 فیلتر نتایج به سال:
in this thesis a calibration transfer method is used to achieve bilinearity for augmented first order kinetic data. first, the proposed method is investigated using simulated data and next the concept is applied to experimental data. the experimental data consists of spectroscopic monitoring of the first order degradation reaction of carbaryl. this component is used for control of pests in frui...
a one dimensional dynamic model for a riser reactor in a fluidized bed catalytic cracking unit (fccu) for gasoil feed has been developed in two distinct conditions, one for industrial fccu and another for fccu using various frequencies of microwave energy spaced at the height of the riser reactor (fccu-mw). in addition, in order to increase the accuracy of component and bulk diffusion, instanta...
objective: the present research was conducted to study the effect of play therapy on reducing behavioral problems of children with oppositional defiant disorder. method: using multistage cluster sampling, regions 6, 7, and 8 in tehran were selected. among kindergartens of these areas, 3 kindergartens which were supported by the welfare organization were randomly selected. of all the pre-school ...
این پژوهش، یک مطالعه نیمه تجربی (quasi- experimental)بصورت قبل و بعد می باشد که با هدف بررسی تاثیر آموزش بهداشت بر کیفیت زندگی زنان در دوران یائسگی در منطقه شهرستان ری، شهر تهران اجرا گردید. ابزار گردآوری اطلاعات در این تحقیق شامل پرسشنامه های آگاهی، نگرش، پرسشنامه کیفیت زندگی خاص دوران یائسگی و برگه بسامد خوراک بود که در دو مرحله قبل و بعد از آموزش در اختیار افراد مورد مطالعه قرار گرفت. پژ...
abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...
conclusions the application of dn produces an improvement in ilf and clf can be prescribed for subjects with mtp in ut muscles. results statistical analysis (paired t-test) revealed significant increase in neck lateral flexion range of motion in contra-lateral side after treatment sessions in control and experimental group compared with pre-treatment score (p < 0.05). however, only dry needling...
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
We study in the laboratory a variant of the house allocation with existing tenants problem where subjects are partitioned into tiers with hierarchical privileges, and they know their position in the priority queue before making their decision. We evaluate the performance of the modified versions of three well-known mechanisms: Top Trading Cycle, Gale-Shapley and Random Serial Dictatorship with ...
OBJECTIVE To evaluate the effects that administering dexamethasone before the induction of ventilator-induced lung injury (VILI) has on the temporal evolution of that injury. METHODS Wistar rats were allocated to one of three groups: pre-VILI administration of dexamethasone (dexamethasone group); pre-VILI administration of saline (control group); or ventilation only (sham group). The VILI was...
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