Positive Result

The following work of drilling the final holes for the injection and ventilation was carried out by manual labours according to the orders described above. The owner returned a positive result for this operation, especially the orientation of the ducts in the building being ab.solutly vertical, henceforth the proposed procedure succeeded. 

The positive results and savings due to use of NDT and TD are hundred times grater than made investments. This is the main reason why the philosophy of safety management was changed, i.e. from the philosophy to react and correcf to the principle to predict and reduce the losses . The use of NDT and TD allows to foresee the results of economic-technical activity, to make mostly efficient decisions, to reduce the risks, to simulate mutual processes relations in technogenic, ecological and social-economical fields. 

On the basis of positive results of the procedure attestation the statement about the possibility for use of the developed procedure is issued and approved in prescribed manner. 

In our implementation of SMD, modified versions of VMD and Sigma communicate with each other using a customized, lightweight protocol. Sigma sends atomic positions resulting from each molecular dynamics time step to VMD for display. When the user specifies restraints on parts of the displayed model, VMD sends them to Sigma, where they are converted into potential-well restraints added to the force field [21]. 

The acetals RCH(OR )j are so readily hydrolysed by acids that they may give a positive result in the above test ... 

Not-Strike may have seen. But what Dr. Quack did that SWINS did not was use the bisulfite test with positive results. What does that mean It means that some doublebonded oxygen was formed, unless Dr. Quack was fibbing to us, It cannot have been a propiophenone (don t ask) because propiophenones cannot form the bisulfite addition product. Could an aldehyde have formed (don t ask) Maybe. But highly unlikely considering the mechanism of the reaction. 

Ref. 295 unless otherwise noted. SW = surface water GW = ground water. Positive results/number of tests. 

The advantage of this test is that it is quick and easy to do, and gives an indication of biodegradation potential. However, the test is not definitive, because any impurities in the plastic, such as plasticizers and solvents, may interfere with the test by promoting growth, and thus give false positive results. 

One standard test used to determine the presence of the coliform group is called the multiple-tube fermentation technique (sometimes called the presumptive test). If this test indicates the presence of these bacteria, then a confirmed test must be done. If only negative colonies or no colonies develop during this test, it is considered negative otherwise, a completed test must be undertaken. Positive results obtained in the completed test are evidence for the presence of coliform bacteria. Testing methods have been given by the APHA, and the detailed procedures contained therein should be consulted (20). 

Several agents deUvered via toothpaste inhibit the accumulation of dental calculus. Pyrophosphate salts, with or without a methoxyethylene—maleic acid copolymer, and zinc salts have given positive results in clinical trials (5). Pyrophosphates were added as potassium or sodium pyrophosphate or mixtures at a level of about 2—6%. The zinc salt was zinc citrate [546-46-3] (0.5—2.0%) or zinc chloride [7646-85-7] (2.0%). The products all contained fluoride in addition to the calculus inhibitor. The anticaries activity of the fluoride was not compromised (6). 

Dentifrices are also vehicles for agents that alleviate dentinal hypersensitivity. Among the materials that have given positive results in clinical tests are potassium nitrate [7757-79-1] (5%) and strontium chloride [10476-85-4] (10%). 

Many compounds capable of chelation have been tested for antimicrobial properties. Those showing positive results include saHcylaldoxime [94-67-7] l-nitroso-2-naphthol [131-91-9] mercaptobenzothiazol [149-30-4], dimethylglyoxime [95-45-4], saHcylaldehyde [90-02-8], cupferron [135-20-6], phenanthroline [66-71-7], isoniazid [54-85-3], thiosemicarbazones, the sulfur analogue of oxine, and numerous antibiotics (qv) including tetracyclines. Whether these compounds function exclusively, partially, or at all by virtue of their abiHty to chelate is open to debate. 

Surprisingly, there are very few examples of successful fV-oxidation of pyrazoles. Simple fV-alkylpyrazoles generally do not react with peracids (B-76MI40402,77JCS(P1)672). The only two positive results are the peracetic acid (hydrogen peroxide in acetic acid) transformation of 1-methylpyrazoIe into 1-methylpyrazole 2-oxide (268) in moderate yield and the peroxy-trifluoroacetic acid (90% hydrogen peroxide in trifluoroacetic acid) transformation of 5-amino-l-methylpyrazoIe into l-methyl-5-nitropyrazoIe 2-oxide (269). 

The ability to identify and quantify cyanobacterial toxins in animal and human clinical material following (suspected) intoxications or illnesses associated with contact with toxic cyanobacteria is an increasing requirement. The recoveries of anatoxin-a from animal stomach material and of microcystins from sheep rumen contents are relatively straightforward. However, the recovery of microcystin from liver and tissue samples cannot be expected to be complete without the application of proteolytic digestion and extraction procedures. This is likely because microcystins bind covalently to a cysteine residue in protein phosphatase. Unless an effective procedure is applied for the extraction of covalently bound microcystins (and nodiilarins), then a negative result in analysis cannot be taken to indicate the absence of toxins in clinical specimens. Furthermore, any positive result may be an underestimate of the true amount of microcystin in the material and would only represent free toxin, not bound to the protein phosphatases. Optimized procedures for the extraction of bound microcystins and nodiilarins from organ and tissue samples are needed. 

Remember that the failure position of a valve refers to its failure mode if there is a utility failure. A valve can mechanically fail in any position it is possible for a fail closed valve to get stuck in the open position. When doing a process hazard analysis it is important to consider all possible failure positions of a valve, and not only the failure position resulting from utility failure. 

FIGURE 24.3 (a) A duct at the junction of the pancreas and duodenum secretes pancreatic juice into the duodenum, the first portion of the small intestine, (b) Hydrolysis of triacylglycerols by pancreatic and intestinal lipases. Pancreatic lipases cleave fatty acids at the C-1 and C-3 positions. Resulting monoacylglycerols with fatty acids at C-2 are hydrolyzed by intestinal lipases. Fatty acids and monoacylglycerols are absorbed through the intestinal wall and assembled into lipoprotein aggregates termed chylomicrons (discussed in Chapter 25). 

In general, 2-substituted allylic alcohols are epoxidized in good enantioselectivity. Like glycidol, however, the product epoxides are susceptible to ring opening via nucleophilic attack at the C-3 position. Results of the AE reaction on 2-methyl-2-propene-l-ol followed by derivatization of the resulting epoxy alcohol are shown in Table 1.6.1. Other examples are shown below. 

Hartwig and Whaley also demonstrated that increasing the size of the alkyl side chain off the 3-position, resulted in low yields of expected product. In fact, when Ri is larger than a propyl group, the expected products were not isolated (n-butyl gave a 1% of the corresponding isoquinoline ). Furthermore, isoquinolines were formed more... 

The reaction of 1,2,4-triazine 4-oxides 8 bearing substituents at the 3, 5, and 6 positions with peroxyacetic acid proceeds as an N-oxidation process exclusively at the 1 position, resulting in 1,2,4-triazine 1,4-dioxides 14. Oxidation of 1,2,4-triazine 4-oxides 8 unsubstituted at the 5 position leads to 5-hydroxy-1,2,4-triazine 4-oxides 15 (76LA153). 

If the pH level of drilling fluid drops and the hydrogen sulfide test result is negative, there is a good possibility that carbon dioxide will be present. Positive results of microbial activity tests (described later) also indicate the possibility of carbon dioxide presence. Carbon dioxide meters are also available commercially and can be used. 

---