A chronic gavage study on rats and mice carried out by the US National Toxicology Program found that 2-mercaptobenzothiazole (MBT) produced some evidence of carcinogenic activity in male and female rats.' A chronic feeding study with mice provided no evidence for involvement of MBT in the neoplastic process.2 The relevance of these findings to workers exposed at work to MBT (or its derivatives)...

Over the centuries, rubber latex gained its popularity in machinery application due to its unique thermal properties, high elasticity and excellent impact resistance. It is widely accepted in food industry as rubber has good resistance to chemicals, including acids, alkalis and salts. For instance, rubber components comprise of couplings, shields, dust covers, gaskets and seals exist as group o...

Scheduling problems play a big role in manufacturing and planning the production for increasing the production efficiency and assigning the resources to operations. Furthermore, in many manufacturing systems there is a physical space between stages that called intermediate buffers. In this study, a model is proposed for minimizing the makespan of a hybrid flow shop scheduling problem with inter...

using the cluster approach aims to increase cooperation in the competition to small and medium units, the use of knowledge and innovation was emphasized and more attention. this study compares the innovation performance with the mediation of knowledge management in industrial clusters rubber parts rosen and rubber parts manufacturing companies that formed clusters have left the hamedan province...

Spontaneous abortions in hospitals were analysed from two sources-membership files of the Union of Rubber and Leather Workers (about 10000 women) and records of the personnel of a rubber factory (about 1600 women). Two frequencies of spontaneous abortions were calculated for each population analysed: rate (No spontaneous abortions x 100/No pregnancies) and ratio (No spontaneous abortions x 100/...

In this article, we report the development of a flexible, 3D printable piezoresistive pressure sensor capable of measuring force and detecting the location of the force. The multilayer sensor comprises of an ionic liquid-based piezoresistive intermediate layer in between carbon nanotube (CNT)-based stretchable electrodes. A sensor containing an array of different sensing units was embedded on t...

This study aimed to assess the relationship between shift working and occupational exposure to noise with blood pressure (BP). The study was carried out in a rubber manufacturing company in 2010. Demographic, medical and occupational information for carrying out the study were collected through direct interview. All 331 under study workers were divided into four groups according to work shift a...

BACKGROUND Contact dermatitis is one of the common work-related dermatoses. Among bricklayers, cement can cause both allergic contact dermatitis and primary contact irritative dermatitis. The personal protective equipment (rubber gloves) may favor the development of allergic contact dermatitis. OBJECTIVES 1) to evaluate the frequency of allergic contact dermatitis among construction workers b...