A Supplementary Note on Fruit Spraying With A Glyoxalidine Preparation in 1948     

R. W. Marsh 《The Journal of Horticultural Science and Biotechnology》2013,88(4):284-287

An instrument is described for measuring the compression of tomatoes under a known weight. This has been used to study the effect of some of the many factors likely to influence the firmness of tomatoes. The measurements of compression were made along the axis from the calyx to the stylar scar.

The compressibility of the fruit increased threefold during ripening from the mature green to the fully red condition. The firmness of the fruits of two varieties increased with the number of locules per fruit.

Comparison of the fruits of eight varieties showed marked differences in firmness; the even-ripening form of Potentate (Potella) was the firmest variety tested, and Harbinger the softest. The compression readings were significantly and negatively correlated with the percentage of walls and placentae, and with the thickness of the fruit as measured along the axis of compression. Fruit size and the percentage of walls were themselves positively correlated.

Both lime and potash significantly increased the firmness of the fruit of variety Moneymaker. Phosphate had a slight beneficial effect, but no significant response was found to nitrogenous fertilizer.

Tomatoes of two varieties, grown with different combinations of shading, day temperature and watering, were examined. Fruits grown at a day temperature of 85° F. (29-5° C.) were 30% softer than those grown at 65° F. (18-3° C.). Some evidence was obtained that heavy watering softened the fruit, particularly under hot, shaded conditions.

Freshly-picked tomatoes of three varieties approaching the fully red condition continued to soften rapidly during storage (74° F.), the effect being highly significant even within three days.

The effect of fruit size on the compression readings, and on percentage compression, is discussed.  相似文献   

The effect of physical ageing on torque in worsted spun yarns     

David Phillips  Jan Hair  Julia Marsh  Laurie Staynes 《Fibers and Polymers》2009,10(2):266-271

The intrinsic torque of freshly spun wool yarns is affected by ageing of wool roving prior to spinning as well as the storage time of the yarn after spinning. The effect of physical ageing of roving on yarn torque properties has not been observed before and this study shows that the yarn intrinsic torque increases with ageing of the roving and decreases or relaxes with the yarn storage time. The dependency of the intrinsic torque on the roving ageing time and the yarn storage time after spinning show a simple double-logarithmic shift factor of 0.42 compared with the value of 1 found generally for amorphous polymeric materials. The self-plying twist of the yarns used in this study shows a close link to the intrinsic torque and both are affected by the history of the roving prior to spinning. Significant reductions in the self-plying twist were obtained when deaged rovings were used in spinning. When self-plying twist is used as a predictor of fabric spirality the roving and yarn history needs to be considered. This study shows that low intrinsic torque yarns can be produced by deageing of the roving prior to spinning.  相似文献   

Parasitemia due to Sarcocystis neurona‐like infection in a clinically ill domestic cat          下载免费PDF全文

Nina C. Zitzer  Antoinette E. Marsh  Mary Jo Burkhard  M. Judith Radin  Maxey L. Wellman  Maria Jugan  Valerie Parker 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2017,46(3):526-532

An 8‐year‐old, 6‐kg, male neutered Domestic Shorthair cat was presented to The Ohio State University Veterinary Medical Center (OSU‐VMC) for difficulty breathing. Physical examination and thoracic radiographs indicated pneumonia, a soft‐tissue mass in the left caudal lung lobe, and diffuse pleural effusion. The effusion was classified as modified transudate. Rare extracellular elongated (~5–7 μm × 1–2 μm) zoites with a central round to oval‐shaped purple to deep purple vesicular nucleus with coarsely stippled chromatin and light blue cytoplasm were seen on a peripheral blood smear. Serum IgG and IgM were positive for Sarcocystis sp. antibodies and negative for Toxoplasma gondii antibodies, suggesting that the infection was acute rather than a recrudescence of prior infection. This organism was most consistent with either Sarcocystis neurona or Sarcocystis dasypi based on DNA sequence analysis of PCR products using COC ssRNA, ITS‐1, snSAG2, and JNB25/JD396 primer sets. This is the first report to visualize by light microscopy circulating Sarcocystis sp. merozoites in the peripheral blood of a domestic cat. Therefore, Sarcocystis should be considered as a differential diagnosis in cats with suspected systemic protozoal infection.  相似文献   

EFFECT OF SOME GREEN-CROP-DRYING PROCESSES ON THE DIGESTIBILITY AND VOLUNTARY INTAKE OF HERBAGE BY SHEEP     

R. Marsh  J. C. Murdoch 《Grass and Forage Science》1975,30(1):9-15

The effect of artificial drying under commercial conditions on the digestibility and voluntary intake of herbage by sheep was studied, using either van den Broek (900°C inlet temperature) or Swiss Combi (1100°C inlet temperature) triple-pass drum-type driers. Organic-matter digestibility of chopped dried herbage was 8·3, 5·8 and 5·3% lower than that of fresh herbage in Experiments 1, 2 and 3, respectively. Packaging chopped dried grass into ‘cobs’ caused a further reduction in OM digestibility of up to 2·8%. Pre-milling plus packaging (i.e. ‘pelleting’) depressed OM digesti bility of chopped dried grass by 5 to 6 percentage units. Digestibility of dried grass in its various physical forms was further reduced when offered ad lib.; the greatest fall (9·4%) occurred with pellets and the smallest fall (0·8?1·3%) with loose chopped material; cobs were intermediate at 4·3?7·0%.  相似文献   

EFFECT OF HIGH FERTILIZER NITROGEN AND STOCKING RATES ON LIVEWEIGHT GAIN PER ANIMAL AND PER HECTARE     

R. Marsh  J. C. Murdoch 《Grass and Forage Science》1974,29(4):305-313

The effect of increasing annual fertilizer N application rate from 400 to 800 kg/ha (357 to 714 lb N/ac) and stocking rate from 5.0 to 7.5 animals per forage ha (2.02 to 3.04 animals per forage ac) on herbage availability, digestible OM intake and live weight gain was investigated in a grazing experiment repeated in 3 consecutive years. A 21×1 day rotational paddock grazing system was used in which the grazing area was increased in the ratio of 1:1.5:3 on two predetermined occasions. Increasing the fertilizer N application rate increased herbage availability by 12% but failed to increase live weight gain. Increasing stocking rate decreased herbage availability per ha and per animal, and also live weight gain per animal, but increased live weight gain per forage ha by 17.6%.  相似文献   

The food and farm policies of the European community: Harris,Simon, Swinbank,Alan and Wilkinson,Guy. John Wiley & Sons,Chichester, 1983. xii + 354pp. Price: £12·50     

John S. Marsh 《Agricultural Systems》1984,14(3):194-195

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Effect of alachlor on Avena seedlings: Inhibition of growth and interaction with gibberellic acid and indoleacetic acid     

T.C. Chang  H.V. Marsh  P.H. Jennings 《Pesticide biochemistry and physiology》1975,5(4):323-329

The growth of Avena seedlings grown in sand was found to be inhibited by alachlor with the time of onset of inhibition after treatment being a function of herbicide concentration. There was a 12 hr lag period following a subirrigation with 2.5 × 10^?4M alachlor before growth inhibition could be detected. This lag period may be due to uptake and translocation of alachlor from the roots to the site of inhibition or to the exhaustion of certain growth-limiting substance(s) whose biosynthesis is inhibited by alachlor. Additions of gibberellic acid by subirrigation simultaneously with alachlor or after alachlor treatment did not prevent growth inhibition. However, treatment with 10^?3M gibberellic acid 24 hr prior to alachlor treatment overcame the alachlor inhibition. On the other hand, in contrast to gibberellic acid, indoleacetic acid did not prevent inhibition by alachlor.  相似文献   

A contribution to the psychology of the polar bear (Ursus maritimus Lin.)     

Marsh JP 《Science (New York, N.Y.)》1886,8(186):187-188

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THE FUR SEAL MORTALITY OF THE PRIBILOF ROOKERIES IN THE ABSENCE OF PELAGIC SEALING     

Marsh MC 《Science (New York, N.Y.)》1912,36(939):897-898

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Vertical patellar position in large-breed dogs with clinically normal stifles and large-breed dogs with medial patellar luxation   总被引：1，自引：0，他引：1  

Johnson AL  Broaddus KD  Hauptman JG  Marsh S  Monsere J  Sepulveda G 《Veterinary surgery : VS》2006,35(1):78-81

OBJECTIVE: To further define vertical patellar position, as measured by the ratio of patellar ligament length to patellar length (L:P), in large-breed dogs with clinically normal stifles and compare that to the L:P of large-breed dogs with medial patellar luxation (MPL). STUDY DESIGN: Retrospective study. SAMPLE POPULATION: Large-breed dogs (n = 50) with clinically normal stifle joints and 30 large-breed dogs with MPL. METHODS: Large-breed dogs with clinically normal stifle joints or MPL were identified and divided into groups (NORM and MPL, respectively). L:P values were determined for each dog by 4 observers from single lateral stifle radiographs. L:P was compared between NORM and MPL groups and 95% confidence intervals (CIs) were calculated. RESULTS: All 4 observers found a significantly higher L:P (more proximally positioned patella) for the MPL group compared with the NORM group. Overall mean (+/-SEM) L:P were: NORM, 1.71+/-0.020 and MPL, 1.87+/-0.025. The 95% CI was determined to be 1.45-1.97 for the NORM group and 1.57-2.17 for the MPL group. CONCLUSIONS: Large-breed dogs with MPL had a significantly more proximal vertical patellar position compared with large-breed dogs with clinically normal stifles. Large-breed dogs with L:P values >1.97 are considered to have patella alta. CLINICAL RELEVANCE: Proximal displacement of the patella within the femoral trochlear groove may play a role in MPL in large-breed dogs.  相似文献