About Requirements to Protection of Equipment from Explosion during Gas-Rescuing Work

Богач; V. Bogach;  Никулин; V. Nikulin;  Потапкин; V. Potapkin

doi:10.12737/1576

About Requirements to Protection of Equipment from Explosion during Gas-Rescuing Work

Safety in Technosphere ◽

10.12737/1576 ◽

2013 ◽

Vol 2 (5) ◽

pp. 31-34

Author(s):

Богач ◽

V. Bogach ◽

Никулин ◽

V. Nikulin ◽

Потапкин ◽

...

Keyword(s):

Analytical Control ◽

Control Data ◽

Protection Level ◽

Class Definition ◽

Explosion Protection ◽

Accident Conditions

The problem of explosive zones’ class definition during gas-rescuing work, as well as requirements related to applied equipment explosion protection have been considered in this paper. It is established that explosive zones in accident conditions belong to class 0 or 1. In the absence of data on an accident source and explosive substances’ leakage nature it is necessary to accept 0 class of an explosive zone and apply the equipment conforming to requirements of special explosion protection during gas-rescuing work. Liquidation of accident consequences after elimination of continuous leak sources can be made with use of explosionproof equipment according to 1 level. The equipment of increased explosion reliability isn´t applied during gas-rescuing work in conditions of explosive mixes formation. It is recommended to accept 2 class related to zones of placement of gas-rescuing works’ command point and gas-rescuing base (inside these zones’ limits the equipment of increased explosion reliability (2Ех) or with IP 54 cover protection level should be used) in case of their location at a distance less than 5 m from external borders of 1 class zone. The recommended sizes related to explosive zones of various classes have been specified subject to existence or absence of gas-analytical control data related to a content of explosive vapors and gases in the atmosphere.

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Studies of Suloctidil in Experimental Thrombosis in Baboons

Thrombosis and Haemostasis ◽

10.1055/s-0038-1661329 ◽

1985 ◽

Vol 53 (03) ◽

pp. 423-427 ◽

Cited By ~ 15

Author(s):

Stephen R Hanson ◽

Laurence A Harker

Keyword(s):

Oral Administration ◽

Thrombus Formation ◽

Vascular Grafts ◽

Scintillation Camera ◽

Control Data ◽

Experimental Thrombosis ◽

Arteriovenous Shunts ◽

Platelet Deposition ◽

Heparin Anticoagulation ◽

Antithrombotic Efficacy

SummarySuloctidil has been evaluated in the baboon for its antithrombotic efficacy using models of both acute and chronic arterial thrombogenesis. Acute thrombus formation was initiated by Dacron vascular grafts inserted as extension segments into chronic arteriovenous shunts. 111In-platelet deposition was measured by scintillation camera imaging for one hour. The results after oral administration of suloctidil (100 mg/kg/d in two divided doses) were not different from control studies. Moreover, concurrent heparin anticoagulation did not affect 111In-platelet deposition compared with control data. In contrast, ticlopidine (20 mg/ kg/d) significantly decreased platelet deposition that was reduced further by the addition of heparin.Chronic arterial-thromboembolism was initiated by segments of polyurethane (Biomer) cannula introduced into chronic arteriovenous shunts. Thrombus formation by the polyurethane cannula was measured as 111In-platelet turnover (corrected for removal of senescent platelets). Cannula platelet consumption was unaffected by suloctidil (20 mg/kg/d given in two divided doses for two days preceding and throughout the period of platelet survival measurement). In contrast, dipyridamole (10 mg/ kg/d) and sulfinpyrazone (100 mg/kg/d) completely interrupted cannula platelet consumption.We conclude that suloctidil probably has little or no effect on platelet-dependent thrombus formation.

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