Consistency, of nature

The aerodynamic wheel cover of claim 3, wherein 50 said adhesive means comprises an adhesive selected from a group consisting of natural or synthetic thermoplastics, and thermosets. 

Rubber and Synthetic Elastomers. For many years nondecorative coated fabrics consisted of natural mbber on cotton cloth. Natural mbber is possibly the best all-purpose mbber but some characteristics, such as poor resistance to oxygen and ozone attack, reversion and poor weathering, and low oil and heat resistance, limit its use to special appHcation areas (see Elastomers, synthetic Rubber, natural). 

Airflow around buildings consists of natural winds chat travel around and possibly through buildings. Airflow around buildings has two influences on industrial ventilation ... 

Compared to synthetic catalysts, enzymes have many advantages. First of all, being natural products, they are environmentally benign and therefore their use does not meet pubhc opposition. Enzymes act at atmospheric pressure, ambient temperature, and at pH between 4 and 9, thus avoiding extreme conditions, which might result in undesired side reactions. Enzymes are extremely selective (see below). There are also, of course, some drawbacks of biocatalysts. For example, enzymes are known in only one enantiomeric form, as they consist of natural enantiomeric (homochiral) amino acids their possible modifications are difficult to achieve (see Section 5.3.2) they are prone to deactivation owing to inappropriate operation parameters and to inhibition phenomena. 

In 1994, the worldwide consumption of rubber was approximately 14.5 million tons a year, of which about 40% consisted of natural rubber. Natural rubber is produced as latex by tropical rubber trees (Hevea brasiliensis). It is processed locally and therefore the quality of natural rubber fluctuates remarkably [ 140]. Due to increasing demand for rubbers, combined with a decreasing production capacity in Asia and a vast increase in labor costs, the price of natural rubber is still rising sharply. In 1990-1994, the average price of natural rubber was about 0.38 /lb, while in 1996 it was already over 0.80 /lb. The remaining 60% of the articles were manufactured from synthetic petroleum-based rubbers such as isoprene rubber, styrene-butadiene rubber, chloroprene rubber and polyurethanes. The quality of synthetic rubbers is constant, and their price varies between 2 and 5 US per kilogram [137-140]. 

Although pyrethroids consist of natural pyrethrins and many photostable synthetic pyrethroids, they must be discriminated when discussing cross-resistance. 

Paper products (newsprint, tissue, packaging, etc.) are made from pulps that consist of natural fibers derived from vascular plants such as trees, sugar cane, bamboo, and grass. The vascular fiber walls are composed of bundles of cellulose polymeric filaments. This long, linear glucose polymer is what paper is made from. The polymer has the structure shown in Scheme 8.18. 

The production of modern car tyres uses more than 100 raw materials, most of which are based on petroleum products. Tyres consist of natural and synthetic mbber, typically styrene-butadiene (SBR) reinforcing fillers (e.g., carbon black, silica, clay, calcium carbonate) reinforcing fibres... 

A pressure-sensitive self-adhesive composition capable of compensating for substrate unevennesses was prepared by Massow et al. (2) and consisted of natural rubber and tackiher resins. 

Peptide-like compounds raise the further significant issue of chirality control. When all the chiral fragments consist of natural amino acids, the chiral sources are natural amino acids themselves. However, when chiral non-natural amino acids are used as bioisosteres of amino acid residues to construct peptide mimetic compounds, the chirality needs to be constructed as efficiently as possible. Multi-step or low-yielding processes resulting from the necessity to control chirality often lead to the potential risk of large amounts of waste and a high environmental burden. 

The third group consists of naturally occurring and synthetic peptides with opioid-like properties. The opioid peptides were discovered during the search for endogenous ligands of the opioid receptors and share the same action and side-effect profile as the non-peptidic compounds... 

These peptides were characterized in vitro and found to be powerful opioid agonists in the mouse vas deferens (MVD) and guinea pig ileum (GPI) assay. In vivo (rat tail-flick) they are only active when administered directly to the brain - a general limitation of simple linear peptides consisting of natural L-amino acids - but with less potency and shorter duration of action than morphine (Casy and Parfitt, 1986). 

Simple linear peptides consisting of natural L-amino acids are rapidly broken down in vivo (and in many in vitro systems) by ubiquitously occurring aminopeptidases... 

In addition to traditional medications, consumers have access to many substances that are not considered a part of conventional or mainstream pharmacothera-peutics. These substances often consist of natural products such as herbal preparations, vitamins, minerals, and other nutritional substances that are taken to promote optimal health or to treat various conditions. These products are usually classified as dietary supplements by the Food and Drug Administration (FDA), and are therefore not subjected to the rigorous testing and scrutiny required for prescription drugs and many over-the-counter medications. 

Before our investigation on the inclusion phenomena of the dipeptide (1) and its related compounds, it had been reported that water, methanol, dimethyl sulfoxide etc. were included by crystalline dipeptides that consist of naturally occurring a-amino acids such as alanine, valine, and leucine, but their phenomena have not... 

The experimental measurement of some of the parameters that describe the operation of a real PFIEBR consisting of natural sodium clinoptilolite ion-exchange columns for removing Pb2+, Ni2+, Co2+ and Cu2+ from water solutions (see Figure 7.13a through d) was carried out. 

Human-type protein analog consisting of natural amino acid Human-type protein analog containing nonnatural amino acid Bioconjugate of human-type protein and other protein Bioconjugate of human-type protein and organic linker... 

Metabolism Study The degradation of a protein to peptides and an amino acid moiety is commonly expected as a representative metabolic pattern. Therefore conventional biotransformation studies are not needed for biopharmaceuticals consisting of natural amino acids. However, metabolism studies of biopharmaceuticals containing nonnatural amino acid may provide useful information. In such cases radiolabeled proteins should be prepared to trace the pharmacokinetic behavior of the nonnatural amino acid fragments. 

Medicated chewing gums are gums made with a tasteless masticatory gum base that consists of natural or synthetic elastomers [25]. They include excipients such as fillers, softeners, and sweetening and flavoring agents. Natural gum bases include chicle and smoked natural rubber and are permitted in formulations by the FDA, but modem gum bases are mostly synthetic in origin and approved bases include... 

It is important to further develop the concept of structure-activity relationships to precisely define the structural requirements of glutathione action. Thus, this section introduces the design, synthesis, and screening of a peptide combinatorial library to obtain multiple glutathione analogs. Combinatorial libraries will be composed of mixtures of peptides (consisting of natural or noncoded amino acids) on solid support. After cleavage from the resin, the mixtures of the peptides will be screened directly in different specific assays. 

Chanical pesticides can be divicbd into two main groups the inorganic and organic compounds. As we will see, a third group of pesticides consists of natural disease-causing agents. 

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