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Author(s): 

ایرجی فریبا

Issue Info: 
  • Year: 

    0
  • Volume: 

    1
  • Issue: 

    1
  • Pages: 

    32-37
Measures: 
  • Citations: 

    1
  • Views: 

    189
  • Downloads: 

    0
Keywords: 
Abstract: 

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 189

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Issue Info: 
  • Year: 

    0
  • Volume: 

    1
  • Issue: 

    1
  • Pages: 

    45-58
Measures: 
  • Citations: 

    1
  • Views: 

    269
  • Downloads: 

    0
Keywords: 
Abstract: 

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 269

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Issue Info: 
  • Year: 

    1375
  • Volume: 

    4
  • Issue: 

    1
  • Pages: 

    0-0
Measures: 
  • Citations: 

    1
  • Views: 

    344
  • Downloads: 

    0
Keywords: 
Abstract: 

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 344

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Journal: 

ریخته گری

Issue Info: 
  • Year: 

    1378
  • Volume: 

    -
  • Issue: 

    62
  • Pages: 

    5-11
Measures: 
  • Citations: 

    1
  • Views: 

    147
  • Downloads: 

    0
Keywords: 
Abstract: 

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 147

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Author(s): 

SHAMSIPOUR R.

Issue Info: 
  • Year: 

    2000
  • Volume: 

    13
  • Issue: 

    1
  • Pages: 

    125-142
Measures: 
  • Citations: 

    0
  • Views: 

    1523
  • Downloads: 

    0
Keywords: 
Abstract: 

Pateyar antimony ore deposit is located 13 km northeast of Anarak. From geological aspect the ore deposit is part of the upper Anarak metamorphic cover ling Chah - Gorbeh and Morghab complexes.These rocks have Late Proterozoic age. The ore deposit is composed of metamorphic, igneous and sedimentary rocks.This area is tectonically very active. The antimony minerals associated with quartz (as a gaunge), are concentrated as vein in fault contact zones.Arsenic, gold, Silver, copper and molybdenum are associated with antimony study in this paper.A high correlation is observed between antimony and arsenic elements. Based on geochemical studies and fabric evidences, pateyar antimony deposit is formed in two stages. At first stage, ore minerals associated with detrital sediments is precipitated and in the second stage, mobile elements from country rock during metamorphic activities are concentrated in faults and open spaces and is enriched by ore minerals.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: 

علوم زمین

Issue Info: 
  • Year: 

    1379
  • Volume: 

    10
  • Issue: 

    38-37
  • Pages: 

    2-23
Measures: 
  • Citations: 

    0
  • Views: 

    2035
  • Downloads: 

    0
Abstract: 

کانسار آنتیموان - آرسنیک - طلای داشکسن در باختر ایران و 42 کیلومتری شمال خاوری شهرستان قروه واقع گردیده است. این کانسار از دیدگاه تقسیمات زمین ساختی، در زون دگرگونی - ماگمایی سنندج - سیرجان قرار می گیرد. بر پایه مشاهدات زمین شناسی، کهن ترین سنگ های منطقه را اسلیت، فیلیت و کوارتزیت های ژوراسیک و جوانترین آن ها را کنگلومرای ولکانو کلاسیک نئوژن و جریان های بازالتی، گدازه های بلوکی و آگلومرای کواترنری تشکیل می دهد. سنگ های نفوذی منطقه مورد بررسی را یک توده نیمه عمیق میکروگرانیتی - میکروگرانودیوریتی با ماهیت کالکو آلکالن و بافت میکروگرانولار - پورفیری به سن نئوژن (احتمالا پلیوسن؟) تشکیل می دهد که در بخش های فوقانی به صورت گنبد (Dome) های داسیتی - ریوداسیتی (آق داغ و ساری داغ) رخنمون پیدا کرده است. کانه زایی در کانسار داشکسن از نوع رگه ای و زون های سیلیسی - سولفیدی طلادار است که بوضوح توسط ساختارهای گسلی کنترل می شود. سنگ میزبان رگه ها و زون های کانه دار را سنگ های نفوذی نیمه عمیق و سنگهای داسیتی - ریوداسیتی سازنده گنبدهای آق داغ و ساری داغ تشکیل می دهند که با انواع دگرسانی هیدروترمال بویژه آرژیلی و سیلیسی شدن همراهی می گردند. کانی شناسی رگه ها شامل: کوارتز، استیبنیت، پیریت، رآلگار، ارپیمان، پیروتیت - کالکوپیریت، بورنیت، گالن، بولانژریت، آروستیبیت (؟)، طلا، استیبکونیت، کرمزیت و هیدروکسیدهای آهن می باشد. عیار طلا در رگه های کانه دار از 55 تا 266 پی پی ام و در زون های سیلیسی سولفیدی از 10 تا 18 پی پی ام تغییر می کند. طلا در ابعاد 10 تا 150 میکرون بیشتر بهمراه کوارتز و در اندازه های کوچکتر در داخل کانیهای پیریت اکسیده مشاهده می شود. مطالعات میکروپروب الکترونی (SEM) مقادیری از عناصر آنتیموان، نقره و جیوه را در درون ذرات طلا نشان میدهد. نتایج آزمایشگاهی نمونه های شش مقطع لیتوژئوشیمیایی عمود بر روند رگه های اصلی استیبینیت در نواحی آق داغ و ساری داغ نشانگر آن است که مقادیر بالای طلا محدود به رگه های استیبنیت و همچنین زونهای دگرسانی سیلیسی - پیریتی است. مطالعات میکروترمومتری سیالات درگیر معرف دمای هموژنیزاسیون بین 255- 183 درجه سانتیگراد و درجه شوری از 8.3 تا 18.8 معادل درصد وزنی کلرید سدیم برای سیالات درگیر اولیه است. در نهایت مجموعه بررسیهای صحرایی، میکروسکپی، سیالات درگیر و سایر شواهد و داده های موجود نشان از رابطه نزدیک بین کانی سازی آنتیموان - آرسنیک - طلا و محلولهای سیلیسی مربوط به توده ساب ولکانیک در ناحیه داشته و حاکی از آن است که کانسار داشکسن بیشترین شباهت را با کانسارهای تیپ اپی ترمال، بویژه نوع اسید - سولفات دارد.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2000
  • Volume: 

    7
  • Issue: 

    4
  • Pages: 

    161-166
Measures: 
  • Citations: 

    0
  • Views: 

    1199
  • Downloads: 

    0
Abstract: 

Acute cutaneous Leishmaniasis (ACL) is an endemic disease in developing countries. The first line drug for treatment of ACL, according to WHO recommendation, is the pentavalent antimony compounds such as meglumine antimonite (Glucantime [sb]). High cost, side effects, multiple injections and incomplete efficacy are limitations of this therapy. We evaluated the efficacy of intralesional (IL) injection of Zinc sulfate 2% in treatment of ACL and compared that with efficacy of IL injection of Glucantime (sb). This prospective double-blind case control clinical trial was performed on 104 patients with typical lesions of ACL and positive direct smear. These patients were treated by IL injection of contents of one of two similar vials A or B. The vials were coded by an independent physician. The patients were seen in two weeks intervals and injection was repeated when required. Improvement was evaluated by clinical examination and direct smear. Follow-up period was six weeks. 66 patients were followed until 6 weeks (35 patients from A group and 31 from B group). After 6 weeks, the cure rates were 60% for A solution and 83.87% for B solution. After 2,4 and 6 weeks of treatment, the responses to therapy with A solution were respectively 3.5±1.14, 3.68±1.11 and 3.8±1.05 versus 3.84±1.11, 4.6±1.25, 3.85±1.24 for B solution. After second and forth weeks, the efficacy of treatment with B solution was higher than A solution (P<0.01), but after six weeks no significant differences were observed between two groups (P>0.05). After only one injection of B solution, cure rate was 54.84%. Reinjection significantly increased efficacy of A, but not of the B solution. A solution was Glucantime and B solution was Zinc sulfat 2%. On the basis of this trial, treatment of ACL by intralesional injection of Zinc sulfate 2% maybe effective.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

MAANIJOU M. | ALIANI F.

Issue Info: 
  • Year: 

    2000
  • Volume: 

    8
  • Issue: 

    1
  • Pages: 

    57-70
Measures: 
  • Citations: 

    1
  • Views: 

    1497
  • Downloads: 

    0
Abstract: 

Abstract: Antimony mineralization occured in Hamedan district (Faghireh) which is related to Alvand Granitoids. The mineralization occured as a series of veins. Thickness of veins are variable and reach up to 0.7m. The veins are emplaced along high angle faults. These faults acted as a pathway for migration of ore fluids. Veins are composed of stibnite, pyrite, realgar and orpiment with quartz as a gangue. The textures of veins are open space filling, however brecciations also occured. Monzogranites, which formed the main part of Alvand pluton, is the host of quartz - stibnite veins. Monzogranites are composed of quartz, sodium plagioclase (oligoclase), orthoclase, biotite and sometimes muscovite.The veins are composed of 30.5% antimony, 0.83 ppm gold and 498 ppm arsenic. Based on geochemical studies, Sb, Au, AS, Ag, Hg, Sn, Ni, Co and Cr contents of host rocks are much higher than the world's average monzograniets and have probably anomalies. Spiderdiagrams show an identical pattern for host rocks and veins, which strongly suggests that these veins are cogenetic with the intrusive rocks (monzogranite).In summary, with all geological evidences in the region, it can be concluded that the mineralization is probably occured in the epithermal type.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 1497

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Issue Info: 
  • Year: 

    2003
  • Volume: 

    -
  • Issue: 

    28
  • Pages: 

    0-0
Measures: 
  • Citations: 

    0
  • Views: 

    1032
  • Downloads: 

    0
Abstract: 

Thin film thermopiles are widely used as small size sensors, in particular to sense infra-red thermal radiations. In this paper a method for designing and fabrication of thin films Bi-Cu thermopiles in linear array of 8 and 11 elements in series and mono-layer is introduced. Also, fabrication of Bi-Sb and Bi-Cu thin film thermopiles, which are used as IR radiation sensors, made in multilayer form with 100 series junctions in circular shape are presented. The samples are fabricated on a PCB board with double-sided copper laminated as a substrate. The results of our measurements show that the output voltage produced due to temperature difference between junctions, is very sensitive and linear to temperature difference

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 1032

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Issue Info: 
  • Year: 

    2003
  • Volume: 

    6
  • Issue: 

    2
  • Pages: 

    20-24
Measures: 
  • Citations: 

    1
  • Views: 

    827
  • Downloads: 

    0
Abstract: 

Background: Different local and systemic modalities are suggested in the treatment of cutaneous leishmaniasis (CL), but the pentavalent antimony compounds are still considered as the first line of treatment. Regarding to increase in clinical drug resistance, adverse and low effects compliance of patients, efforts for finding a more effective and safer drug continue. Objectives: To evaluate the efficacy of oral zinc sulfate in the treatment of acute dry CL. Patients Methods: 31 patients with & clinical diagnosis of acute, dry CL and positive direct smear for leishman bodies were included in the trial. Patients were treated with 10 mg/kg/day oral zinc sulfate for 45 days and evaluated every 3 weeks during the period of treatment and also 1.5 months after cessation of it. Results: 22 patients completed the course of treatment.At the end of 45 days of treatment, only two cases (9%) were cured and the remaining did not show satisfactory response. Conclusion: Oral zinc sulfate has limited therapeutic value in the treatment of dry CL.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 827

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