Report of the Higher Education Study Commission [to the Governor and the General Assembly of Virginia]

This 1965 Report of the Higher Education Commission, appointed by Governor Albertis S. Harrison, Jr., was created to review higher education in Virginia to be used as a basis for long-range planning by the Commonwealth of Virginia. The Commission was led by Senator Lloyd C. Bird and supported by the staff of the State Council for Higher Education. Divided into eleven sections, this 200-page report details information including geographical location of students, library services, and different instructional services.https://scholarscompass.vcu.edu/vcu_books/1005/thumbnail.jp

Mercury Selective Electrode

The present invention is an apparatus for laboratory and field use in detecting and measuring Hg.sup.+ and Hg.sup.2+ in sample. A selective mercury binding agent, such as a chelating agent or clathrating agent, is covalently bound in a copolymer and deposited as an electrode layer. To prepare the preferred apparatus of the invention, thiophene, or other, similar monomer, is derivatized by covalent attachment thereto of Kryptofix-21.TM. (1,4,10-trioxa-7,13-diazacyclopentadecane) in the 3-position. The thiophene monomer and Kryptofix-21.TM. are co-polymerized and electrodeposited by known techniques onto a conductive substrate, such as platinum or glassy carbon, to obtain a multi-layer polymer coating of desired thickness. The resulting coated electrode has selective coordination sites for mercury of the order of K.sub.f =10.sup.16, compared to K.sub.f =10.sup.3 for cadmium, K.sub.f =10.sup.5 for lead and K.sub.f =10.sup.5 for silver. Therefore, the resulting probe is very selective for mercury, compared to cadmium, lead and silver

Varying the Abundance of O Antigen in \u3cem\u3eRhizobium etli\u3c/em\u3e and Its Effect on Symbiosis with \u3cem\u3ePhaseolus vulgaris\u3c/em\u3e

Judged by migration of its lipopolysaccharide (LPS) in gel electrophoresis, the O antigen of Rhizobium etli mutant strain CE166 was apparently of normal size. However, its LPS sugar composition and staining of the LPS bands after electrophoresis indicated that the proportion of its LPS molecules that possessed O antigen was only 40% of the wild-type value. Its LPS also differed from the wild type by lacking quinovosamine (2-amino-2,6-dideoxyglucose). Both of these defects were due to a single genetic locus carrying a Tn5 insertion. The deficiency in O-antigen amount, but not the absence of quinovosamine, was suppressed by transferring into this strain recombinant plasmids that shared a 7.8-kb stretch of the R. etli CE3 lps genetic region α, even though this suppressing DNA did not carry the genetic region mutated in strain CE166. Strain CE166 gave rise to pseudonodules on legume host Phaseolus vulgaris, whereas the mutant suppressed by DNA from lps region α elicited nitrogen-fixing nodules. However, the nodules in the latter case developed slowly and were widely dispersed. Two other R. etli mutants that had one-half or less of the normal amount of O antigen also gave rise to pseudonodules on P. vulgaris. The latter strains were mutated in lps region α and could be restored to normal LPS content and normal symbiosis by complementation with wild-type DNA from this region. Hence, the symbiotic role of LPS requires near-normal abundance of O antigen and may require a structural feature conferred by quinovosamin

Intracranial mobility in mosasaurs

Mosasaurs are an extinct family of large marine lizards which have been found abundantly in, and are apparently restricted to, sediments deposited in shallow epicontinental seaways during late Cretaceous time…

The 18th century western Cree and their neighbours : identity and territory

The eighteenth century historical documents fail to support the accepted view, advanced by David Mandelbaum and others, that the Cree and Assiniboin invaded the west after 1690 as a result of the introduction of the fur trade. This view, seemingly supported by nineteenth century authorities, has its only source in several brief ambiguous statements published in 1801 by Alexander Mackenzie. The western limits of the Cree and Assiniboin in the early 1700s remain unclear. Their marauding activities against members of the Blackfoot Confederacy occurred only in the late 1700s, almost fifty years after they were documented as peacefully living in central Alberta. In the mid-1700s, six major Cree groups inhabited the western parklands, plains and boreal forest: the Susuhana, Sturgeon, Pegogamaw, Keskachewan/Beaver, Athabasca and Missinipi. These groups were all obliterated by the smallpox epidemic of 1781, and it was the resultant population shifts which were noted by nineteenth century observers

Response of giant ragweed, jimsonweed, common lambsquarters, tall morningglory, and velvetleaf in soybeans to various overtop postemergence herbicides

Many broadleaf weeds in soybeans [Glycine max (L.)] are not adequate-ly controlled by currently available preemergence herbicides. Recent studies have shown that several postemergence herbicides, such as bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-(4)3H-one 2,2-dioxide], chloroxuron [3-[p-(p-chlorophenoxy) phenyl]-1,1-dimethylurea], dinoseb [2-sec-butyl- 4,6-dinitrophenol] plus naptalam [N-1-naphthylphthalamic acid], 2,4-DB [4- (2,4-dichlorophenoxy) butyric acid], and RH-6201 [sodium 5-2-chloro-4- (trifluoromethyl)-phenoxy-2-nitrobenzoate], can be applied overtop of soybeans without causing severe injury. The objective of this 1977 study was to determine the efficacy of these herbicides, when applied at different stages of growth, for control of tall morningglory [Ipomoea purpurea (L.) Roth], jimsonweed [Datura stramonium (L.)], giant ragweed [Ambrosia trifida (L.)], common lambsquarters [Chenopodium album (L.)], and velvetleaf [Abutilon theophrasti (Medic.)] in soybeans. The experiment was conducted on sites where natural infestations of jimsonweed, tall morningglory, common lambsquarters, and velvetleaf occurred. The giant ragweed experiment was seeded. Alachlor [2,-chloro- 2\u27,6\u27-diethyl-N-(methoxymethyl) acetanilide] was applied as a preemergence herbicide over each experimental area to control annual grasses. Herbicides were applied overtop of soybeans in late spring and early summer of 1977 as the weeds reached various plant heights, i.e., 3 to 5, 10 to 15, 20 to 25, and 38+ cm. tall. Bentazon effectively controlled giant ragweed less than 15 cm, tall, common lambsquarters less than 10 cm. tall, and velvetleaf less than 30 cm. tall. It did not control tall morningglory but controlled jimsonweed through the 38+ cm. height. Chloroxuron effectively controlled common lambsquarters less than 10 cm. tall, velvetleaf less than 15 cm. tall, jimsonweed less than 15 cm. tall, and tall morningglory less than 5 cm. long. Dinoseb plus naptalam effectively controlled giant ragweed less than 15 cm. tall, tall morningglory less than 5 cm. long, velvetleaf less than 15 cm. tall, and jimsonweed at all stages of growth. It did not control common lambsquarters. Giant ragweed less than 30 cm. tall was effectively controlled by 2,4-DB. Common lambsquarters (less than 5 cm. tall) and velvetleaf (less than 15 cm. tall) were also controlled by 2,4-DB. Jimsonweed and tall morningglory (Spring Hill experiment only) were susceptible to 2,4-DB at all stages of growth used in this study, and tall morningglory (Knoxville experiment only) less than 15 cm. in length was also susceptible. The herbicide RH-6201 effectively controlled giant ragweed less than 15 cm. tall, common lambsquarters less than 5 cm. tall, tall morningglory less than 5 cm. in length, velvetleaf less than 5 cm. tall and jimsonweed at all stages of growth

Systematics and morphology of American mosasaurs (Reptilia, Sauria)

Mosasaurs were large, marine platynotan lizards which became abundant and diversified during the latter half of Cretaceous time, but disappeared at the close of the period….https://elischolar.library.yale.edu/peabody_museum_natural_history_bulletin/1022/thumbnail.jp