To ensure that the welded steel pipe in the winter welding perfect follow the following steps:First, increase the welding current welding, slow down the welding speed, the appropriate increase in the cross-sectional area and length of the weld, if necessary, preheat.Second, not outside the groove on the base metal to start arc, arc extinction to be filled when the pit.Third, as far as possible not in low temperature conditions for bending, correction and assembly weldments.Fourth, preheating before welding, welding process to strictly maintain the interlayer temperature should not be lower than the preheating temperature of coating steel pipe.Fifth, the use of low hydrogen or ultra-low hydrogen welding materials.Six, the entire weld should be finished as far as possible to avoid interruption.
3 Geographically Suitable Cars for a Smooth Ride in Oregon
Buying a car is a difficult process. The deciding factors of any car buying process are the available financing options, price of the car and the geographical fit of the car. To ensure a perfect geographical fit, you should buy a car after considering your geographical region.
Cars that are Suitable for the Residents of Oregon
Oregon is a state with diverse landscapes; such as mountains, beaches and forests. Additionally, Oregon is the ninth largest state in America. With such a diverse landscape and an area of 98,000 square miles, it often becomes difficult to select a car that is geographically suitable to drive in Oregon. Thus, the following cars can pose as suitable options for buying your next car in Oregon.
1. Jeep Renegade Sport
The state of Oregon is home to at least 50 mountain ranges. Some of the prominent mountain ranges of Oregon include the Cascade Ranges, Mount Hood and the Buck Mountains. Keeping the geography in mind, Jeep Renegade Sport is the ideal choice for driving in the mountainous regions of Oregon. It has a four-cylinder engine and six-speed manual shifter. Its features make it easier to navigate through mountainous regions. Therefore, if you are interested in a race on the dirt track of the mountains or adventure drives, a Jeep Renegade Sport is a good option to consider while buying a car in Oregon.
2. BMW 4 Series
The wide coastline of Oregon has over 45 beaches; such as the Cannon Beach and the Arcadia Beach. In order to enjoy the beach, a convertible car is the best option. The BMW 4 Series contains a turbocharged four-cylinder engine along with enough space that ensures comfortable legroom. The car is comfortable and a smooth ride for a day out on the beach. Thus, if you want to buy a car for frequent outdoor beach visits in Oregon, BMW 4 Series tops the list for the best convertible car.
3. Ford F-150
The total land base of Oregon accounts for 63 million acres, out of which approximately 30 million acres is the forest region. With such a huge part of the state covered in forests, a pick-up truck will be of help in moving around the forests quickly. The Ford F-150 has a six-speed automatic engine and a maximum capacity limit of 12,200 pounds that it can carry easily. Additionally, the requirement of a car with well-built exterior is met by Ford F-150 as it contains an aluminum body. Therefore, the car is the ultimate pick-up truck for driving across the forest regions of Oregon.
Due to the diverse landscapes of Oregon, it can become a difficult task to choose a car that matches with the geography of the state. However, you can make a decision by considering your geographical factors to buy a car that ensures a smooth ride.
Medical Enzymes Will Become a New Bright Spot in the International Pharmaceutical Market
With the advent of more and more new enzyme preparations, medical enzymes will become a new bright spot in the international pharmaceutical market. There are only a few varieties of domestic medical enzymes such as multi-enzyme tablets. Enzyme is a general term for important protein and biochemical substances. Enzymes exist in plants and animals.
As early as more than 100 years ago, Western scientists have isolated trypsin with physiological effects from animal digestive tract fluids. This substance can break down various proteins into amino acids in test tubes. Because of its extensive participation in various physiological activities, enzymes have become more and more widely used in medicine. Due to the small demand for industrial enzymes, the fermentation method for industrial production of enzymes, namely the fermentation method, did not come out until the 1950s.
Although there are at least thousands of enzymes discovered by scientists at present, there are only dozens of enzymes that are actually put into industrial production, and some enzymes are directly extracted from plants or prepared by bioengineering technology. Enzyme is an ecological and efficient catalyst, and has a strong specificity that one enzyme can only catalyze and transform one substance. At present, the global total production of industrial enzymes has exceeded 1 million tons, and China’s annual production of enzymes accounts for about 1/3 of the world’s total output.
It is estimated that in 2007, the total global market sales of enzymes reached 5 billion to 6 billion US dollars. The most important uses of enzymes are concentrated in the food industry. In addition, they are also widely used in the pharmaceutical industry, feed and other industries. In terms of consumption, the food industry consumes about two-thirds of the world’s total enzyme production, and the total consumption of enzymes in other industries accounts for the remaining one-third.
It plays an important role in the production of β-lactam antibiotics. The application of enzymes in the pharmaceutical industry began in the early 1980s. With the advent of cephalosporin β-lactam antibiotics, the serious environmental pollution caused during the production of cephalosporin products is worrying. At that time, British and Dutch scientists first reformed the chemical lysis method that has been used for many years into a clean and efficient “enzymatic lysis”-the enzyme used was penicillin lyase and cephalosporin lyase, thereby eliminating the production of semi-synthetic penicillin or cephalosporin Environmental pollution caused by bacteriocin products. These two enzymes can be used to prepare a series of semi-synthetic penicillins such as ampicillin and amoxicillin and other key raw materials for cephalosporins. With the implementation of the enzymatic cracking process, antibiotic production has entered a brand new “enzymatic production era”.
In recent years, some newly developed therapeutic enzyme preparations abroad such as antibacterial enzymes, fibrinolytic enzymes, mucolytic enzymes, analgesic enzymes, antitumor enzymes, immune activator enzymes, etc. In addition, Western researchers have also found that protease preparations compatible use with existing antibiotics such as ampicillin, tetracycline, SMP-CO and fluoroquinolones can greatly improve the antimicrobial effect of these drugs and reduce the drug resistance of bacteria.
According to reports, some hospitals have combined enzyme preparations with antibiotic preparations to achieve good results in the treatment of refractory urinary tract infections. These new clinical uses have laid a solid foundation for the medical market for enzyme preparations. Medical enzyme preparations have become a new breed of therapeutic agents. With the advent of more and more new enzyme preparations, medical enzymes such as diagnostic enzymes will become a new bright spot in the international pharmaceutical market. The enzymes produced now are mainly concentrated in the food industry, accounting for about 96% of the domestic enzyme production value, and there are very few varieties for treatment. At present, there are only a few varieties such as multi-enzyme tablets and lumbrokinase. It is believed that, driven by the new trend of international drug use, domestic development of new medical enzyme production will have broad market prospects.