Device facilitates centering of workpieces in lathe chuck

Spring loaded device used in conjunction with a standard dial indicator facilitates centering a workpiece in an independent four-jaw lathe chuck

Analysis of organochlorine and organophosphate pesticide residues in cabbage

Compounds present in cabbage (Cruciferae, family, genus Brassica, genus Brassica, variety capitata) which interfere with pesticide analysis by an electron capture detector on a gas liquid chromatograph were investigated. The interfering compounds were found to be present throughout various segments of the cabbage head as well as in cabbage grown in different geographical areas under different growing condition. During storage of the cabbage up to 40 days at 2°C prior to analysis, the interfering compounds decreased in concentration. After 16 days storage, some compounds disappeared while other compounds appeared; however, some interference remained up to 40 days of storage. Various treatments which did not remove the interference included: heat, and different clean-up methods by florisil columns, and acid-celite column, and an ion-exchange column. Mass spectrometry of interference from cabbage indicated the presence of N-octadecane, the existence of long chain hydrocarbon waxes, and the existence of alkyl substituted benzene rings. Mass spectrometry showed that volatiles which are a part of cabbage flavor (sulfur containing) or various pesticides were not the interfering compounds. Recovery studies of organochlorine and organophosphate pesticides in which 2 to 16 ug were added to cabbage samples showed recoveries of 101 to 120% at 2 to 4 ug for α-BHC and 2 to 8 ug for lindane and β-BHC, and recoveries of 95 to 116% for p,p\u27-000 and p,p\u27-OOT at 8 to 16 ug. Heptachlor, phorate, and methyl trithion showed low recoveries which increased to 67 to 76% recovery at 16 ug added. Other pesticides (aldrin, p,p\u27-DDE, dieldrin, o,p\u27-DDD, o,p\u27-DDT, diazinon, and malathion) showed from 140-318% recovery, indicating more research is needed on the quantitation of these pesticides in cabbage by GLC-ECD using an internal standard

Aging in Urban Communities, Neighborhood Senior Attachment and Youth Offending: New Roles and New Goals

Indiana University-Purdue University Indianapolis (IUPUI)Relationships among neighbors contribute to the well-being and outcomes of all who live within a neighborhood. Existing literature provides us with a wealth of information on individual seniors’ isolation but does not seem to consider how neighborhood factors add to the attachment of seniors. Given the increasing number of seniors in our society who have the ability to remain living in their neighborhoods as they age, this study focuses on understanding neighborhood attachment to seniors living in the community. Furthermore, emphasis was placed on the potential impact that senior attachment could have on youth as one subset life stage who reside in a neighborhood. This thesis describes the characteristics of neighborhoods that foster low, normal, and high levels of senior attachment in urban areas and explores the relationship this attachment has to neighborhood youth outcomes. This research opens the door for other scholars to begin to place greater emphasis on the understanding of neighborhood dynamics, intergenerational ties to seniors, and the well being of residents across the life course

Insertion loss and noise-temperature contribution of high-temperature superconducting bandpass filters centered at 2.3 and 8.45 GHz

Two superconducting Tl-Ca-Cu-Ba-O bandpass filters were fabricated for JPL by Superconductor Technologies Incorporated, Santa Barbara, California. The filters were designed to operate at 2.3 GHz (S-band) with a 0.5-dB bandwidth of 60 MHz and at 8.45 GHz (X-band) with a 0.5-dB bandwidth of 150 MHz. The structure selected for both filters incorporates half-wavelength thin-film resonators in a stripline configuration. The S-band filter uses an edge-coupled interdigital design and the X-band filter uses an end-coupled design. The insertion loss and the noise-temperature contribution were measured at 12 K for both filters

Brief Note: Fishes of the Upper Portage River, Ohio, 1973-1975

Author Institution: Aqua Tech Environmental Consultants, Inc. ; Bowling Green State University, Department of Biological Sciences ; Aqua Tech Environmental Consultants, Inc

Physiological factors affecting ovine uterine estrogen and progesterone receptor concentrations

Two experiments were conducted to determine whether in ewes uterine concentrations of estrogen and progesterone receptors are affected by the presence of a conceptus or by the hormonal milieu associated with extremes in photoperiod to which ewes are exposed. In Exp.1, nine mature ewes were unilaterally ovariectomized by removing an ovary bearing the corpus luteum (CL). The ipsilateral uterine horn was ligated at the external bifurcation and a portion of the anterior ipsilateral uterine horn was removed and assayed for endometrial nuclear and cytosolic concentrations of estrogen receptor (ER) and progesterone receptor (PR) by exchange assays. After a recovery estrous cycle, ewes were bred to a fertile ram. On day 18 of gestation a 10 ml jugular blood sample was collected for measurement of serum concentrations of estradiol -17β (E₂) and progesterone by radioimmunoassay. Ewes were relaparotomized on day 18 and the remaining uterine tissue was removed. Endometrium from both the pregnant and nonpregnant uterine horn was assayed for nuclear and cytosolic ER and PR concentrations. Nuclear and cytosolic ER concentrations on day 10 of the cycle were greater than in endometrium of gravid and nongravid uterine horns on day 18 of gestation (p<.01). Endometrial nuclear PR levels were also greater on day 10 of the cycle than in the pregnant (p<.05) and nonpregnant horn (p<.01) on day 18 of gestation. There were no differences in nuclear and cytosolic ER and PR concentrations between the pregnant and nonpregnant uterine horn on day 18. Serum levels of E₂ and progesterone on day 18 of gestation were 16.56 ± 2.43 pg/ml and 1.74 ± 0.57 ng/ml, respectively. These data suggest that duration of exposure of the uterus to progesterone and(or) the presence of the conceptus causes a reduction in uterine concentrations of ER and PR. Further, an effect of the conceptus, if any, is exerted via a systemic route. In Exp. 2, ten mature ewes were bilaterally ovariectomized in early October. During the onset of the winter solstice (late December), a 10 ml blood sample was collected from five ewes for analysis of serum levels of E₂ and progesterone. Ewes were then laparotomized and approximately one-third to one-half of a uterine horn was removed and assayed for endometrial nuclear and cytosolic ER. The contralateral horn was ligated at the external bifurcation and 10 μg of E₂ in 3 ml of physiological saline was injected into the uterine lumen of the ligated horn. After 48 h, a jugular blood sample was collected for steroid analysis and a section of the E₂ treated horn was removed and assayed for endometrial cytosolic and nuclear ER. This procedure was repeated on the remaining five ewes during the height of the summer solstice (late June). Endometrial nuclear and cytosolic concentrations of ER prior to and after exogenous E₂ stimulation were similar during the winter and summer solstice (p>.05). However, treatment with E₂ increased endometrial nuclear and cytosolic concentrations of ER compared with those of the nonstimulated uterine horn during the winter and summer solstice (p<.05 for each). Serum levels of E₂ prior to luminal treatment of ewes with E₂ during the winter and summer solstice did not differ (16.55 ± 4.05 vs 16.00 ± 3.0 pg/ml, respectively, p>.05). Serum levels of E₂ 48 h after administration of E₂ did not differ among ewes at the winter and summer solstice (18.75 ± 2.4 vs 18.65 ± 1.65 pg/ml, respectively, p>.05). Serum levels of progesterone were basal (<0.10 ng/ml) and did not differ in ewes prior to and after E₂ treatment at the winter and summer solstice (p>.05). These data indicate that physiological factors and(or) hormones such as prolactin and melatonin secreted in response to extremes in photoperiod do not appear to influence uterine concentrations of ER in ovariectomized ewes

Pay More for a Good Beef Herd Bull.

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