The genus Mycobacterium is commonly associated with diseases such as leprosy, tuberculosis and other pulmonary infections. Mycobacterium avium is increasingly identified as a cause of disseminated disease in AIDS patients. A need for a better understa . . .

Two syrphine flies (Diptera: Syrphidae) were studied to measure the possible difference in the abdominal color pattern variation of sternites 2-5. Toxomerus marginatus, a non-mimetic syrphine, shows much more variation in its abdominal color pattern t . . .

Paralabrax clathratus, commonly known as the kelp bass, is an important sportfish to the Southern California angler, ranking among the top sportfish on commercial passenger fishing vessels since the 1950's. They commonly occur in a patchy distribution . . .

Clusterin is a multi-functional protein that was initially isolated from ram testis. It was first identified for its ability to promote aggregation of cells, hence the name clusterin (Fritz et al., 1983). Subsequent research has identified clusterin i . . .

Cell surface properties play an important role in embryonic morphogenesis and in malignant invasion. Cell surface sugar chains extend away from the cell membrane and are believed to be involved in cellular migration and adhesiveness. Some of these sug . . .

Ammonia, glutamate, or glutamine can be utilized as sole source of nitrogen by Sporosarcina ureae. The growth rate is proportional to the concentration of ammonia up to a set value of 0.6 div./h at 84 mM, but concentration independent for glutamate at . . .

Many studies have examined the effects of free lectins such as Concanavalin-A (Con-A) on sea urchin development and suggested that lectin binding ligands play a role in embryonic cellular interactions. In this study, the effects of immobilized Con-A o . . .

The sea urchin is the material of choice for studying many early developmental events. Methods to extend the viability of sea urchin gametes have not received much attention, but it is well known that the eggs are easily damaged by freezing (4). This . . .

Cell adhesion has been studied for almost a century beginning with H.V. Wilson's classic studies on sponge cell aggregation. Cell adhesion plays an important role in morphogenesis and malignancy, but its molecular basis is poorly understood. As the ce . . .

Iranian Jews constitute a growing minority in metropolitan cities around the United States. They are part of a close-knit community, with strong family and cultural values. Prevailing negative attitudes in the Iranian Jewish society towards disease an . . .

The purpose of this study is to determine whether the level of folic acid (FA) in human blood serum affects the number of fragile sites observed in cultured T-lymphocytes. Private practice patients (Internal Medicine) who evidenced no symptoms of sign . . .

The homocystinurias are a group of autosomal recessive disorders which are caused by various inborn errors of metabolism. Tnese disorders are characterized by high plasma and urinary ieveis of homocysteine and methionine, and low levels of cysteine. T . . .

A variety of models of cell adhesion have been proposed by previous investigators; each depended heavily on details of the biochemistry of cell surface sugars. In this study, Lytechinus pictus sea urchin embryos were used to study the molecular mechan . . .

Applications of a low-speed centrifuge rotor designed to separate whole cells at very low g-forces in partially reoriented, shallow density gradients are presented. The particle separation chamber was fabricated using Lucite so that gradient behavior . . .

Habitat fragmentation plays a major role in species extinction and the loss of biodiversity around the globe. When fragmentation occurs, the initial loss of overall habitat alone causes species extirpation. However, species that survive this initial l . . .

The susceptibility of ecosystems to the introduction of non-native species has increased drastically with the development of advanced transportation technologies. It is now quite common for organisms to be easily transported by humans across physiolog . . .

In sea urchin eggs the hexose monophosphate shunt is the main glycolytic pathway before and after fertilization, and glucose-6-phosphate dehydrogenase (G6PD) is the main regulatory enzyme of the pathway. Activity of the enzyme increases with fertiliza . . .

Invasive plants threaten native biodiversity and ecosystem function. Non-native plants can out-compete native plants for resources, reducing population sizes. For rare species, this can increase the chances of extinction. Pentachaeta lyonii is an enda . . .

The growth in length and weight of immature fruit and seed of carob (Caratonia siliqua L.) was studied over a period of seven months. During the early periods of development, seed and fruit growth follow a parallel course; however, the seed continue t . . .

Quantifying the effects of bacterial communities and temperature on coral-associated endosymbionts adds to our understanding of coral health. Genetic variation in endosymbionts may increase the fitness of the holobiont - coral and associated microbes . . .

Hereditary Inclusion Body Myopathy (HIBM) is a homozygous recessive disorder characterized by the M712T mutation. Humans who inherit this disorder develop skeletal muscle wasting, which is largely attributed to a sialic acid deficiency. In order to de . . .

The oceans have absorbed excess carbon dioxide (CO2) resulting from anthropogenic activities such as the burning of fossil fuels and deforestation. As a result, seawater chemistry has shifted causing an increase in bicarbonate ions (HCO32-) and hydrog . . .

The electrophoresis of whole cellular DNA from the non-photosynthetic alga Polytomella parva revealed a distinct 3.7 kb band. This band of DNA was isolated from the agarose gel and used to construct a non-radioactive probe utilizing Photobiotin. Cellu . . .

Investigation into the acclimation patterns of Embryonic Limax flavus clearly suggests that heart rate, when measured over a period of time or throughout a temperature range) shows compensatory response patterns similar to those described for oxygen c . . .

Nostoc punctiforme is a filamentous cyanobacterium capable of multiple cellular differentiation from vegetative cells into akinetes, heterocysts and hormogonia. In order to control this differentiation, tight regulation of gene expression is required. . . .

Conidiation in N. crassa can be either induced or suppressed by altering the growth media. When grown in standing cultures, strain Lind+ forms about 105 conidia per ml of medium. This conidial production occurs during the second to fifth day. The leve . . .

The purpose of this investigation was to study the metabolism of three species of young and adult Peromyscus by means of oxygen consumption. Young Peromyscus were used to determine the timing of the onset of homeotherapy and to ascertain whether age o . . .

A variety of models of cell adhesion have been proposed by previous investigators; each depended heavily on details of the biochemistry of cell surface sugars. In this study, Lytechinus pictus sea urchin embryos were used to study the molecular mechan . . .

Cultures of a serine auxotroph of Neurospora crassa, ser (JBM 4-13), demonstrate a high frequency of spontaneous reversion to prototrophy. This study examines two questions: First, whether the phenomenon of spontaneous reversion occurs in all vegetati . . .

Motivated by the growing number of studies reporting inter-specific differences for the effects of OA on calcifying taxa, this study tested the hypothesis that taxonomically diverse calcifying cnidarians show differential responses to OA. Phylogenetic . . .

Metastatic breast cancers carry a 5-year survival prognosis of less than 20%. Thus, it is highly desirable to identify therapeutic strategies that specifically target both primary and metastatic tumors. It is generally accepted that epithelial-mesench . . .

The human gut is home to trillions of microbial cells whose functions are essential for normal human physiology. However, quantitative linkages between diet and gut microbiome composition are lacking, particularly in post-weaned, pre-pubescent childre . . .

The feeding behavior of five species of tellinaceans was studied in four locations in California, USA. The organisms were studied in areas where they occurred sympatrically with other tellinaceans and in other areas where no other tellinaceans were pr . . .

Recent studies suggest that species identity is of great importance in determining how herbivores structure coral reef communities. This study provides evidence that echinoid species differentially shape the community through unique feeding strategies . . .

Applications of a low-speed centrifuge rotor designed to separate whole cells at very low g-forces in partially reoriented, shallow density gradients are presented. The particle separation chamber was fabricated using Lucite so that gradient behavior . . .

Scleractinian abundance has declined over the last few decades on most coral reefs. This reduction in scleractinian cover is associated with multiple types of disturbances including outbreaks of predators and diseases, mass coral bleaching, storms and . . .

Phorid fly parasitoids of ants are capable of decapitating their host during development and have been used as attempted biological control agents for imported fire ants. Little is known about the interactions between the native Velvety Tree Ant host, . . .

The effects of the telomere, centromere, and centric heterochromatin on recombination were assessed using two paracentric inversions, scute-4 (sc4) and scute-8 (sc8) in both homozygous and heterozygous combination. The centromere effect was verified b . . .

Mitochondrial differentiation and development within Fucus sperm is characterized by a series of internal rearrangements and mass acquisitions relating to overall form and organelle disposition within the mature sperm cell. Moreover, it seems clear th . . .

Bone marrow transplantations for leukemia patients are currently limited because Hematopoietic stem cell (HSC) ex vivo expansion is constrained. We investigated a cell surface marker, GPI80, which isolates for a purified population of human HSC in the . . .

The cranial osteology of the genus Uma is described in detail, interspecific variation is analyzed, and the natural selective forces which produced this variation are discussed. The variation is interpreted with respect to the phylogeny and biogeograp . . .

A cell line of Polytomella parva resistant to the metabolic inhibitor antimycin A was isolated. These cells are resistant at a concentration of 2 X 10-5M. Studies on the growth of this resistant cell line (designated P. parva 17-9AA) showed significan . . .

In the dimorphic aquatic bacterium Caulobacter crescentus, genes are transcribed immediately before their protein products are required. Groups of genes, or genetic modules, are temporally controlled by oscillating master regulators. Oscillation is dr . . .

Santa Catalina Island, twenty-two miles off the southern California coast, Has the site of a study on the ecology of feral house. cats (Felis domestica). Observation of behavior physical characteristics and capture sites were used to determine whether . . .

Background: In this study, we assessed the ability of human neural progenitor cells (hNPC) to repair and restore the function of dying neurons within the spastic Han-Wistar rat (sHW), the mutant variant of a normal Han-Wistar. The sHW rat suffers from . . .

In benthic associated fish species, the time an individual spends in the larval phase until settlement to a benthic substratum is a vulnerable and critical period determining survival. In many species, the length of this period can strongly influence . . .

The breeding biology of Western Gulls (Larus occidentalis) on Santa Barbara Island is strongly influenced by the distribution and abundance of certain forms of cover, especially the shrub, Suaeda californica (seablite). Early in the breeding season, n . . .

In the spring, adult toads move several hundred meters from the surrounding hills to the breeding site in Seminole Lake to spawn, commonly swimming more than 80 m across the lake to the breeding congress. When artificially displaced from the breeding . . .

Sporosarcina ureae is an aerobic, motile, spore-forming Gram-positive cocci that was originally isolated in the early 20th century from soil enrichments with elevated levels of urea. The species is unique in that it is the only known spore-forming coc . . .

Fourteen phenolic compounds and three related nonphenolic compounds were tested for their ability to inhibit GA 3 -induced growth of dwarf pea seedlings. Test concentrations of 10:1, 100:1, and 1000:1 (phenolic or related nonphenolic to GA3 ) by weigh . . .