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Development of morphogenetic agents in insect control. 昆虫防治中形态发生剂的研制。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509435837
J J Menn, F M Pallow

Chemicals which interfere with the growth and development of insects (morphogenetic agents) have been receiving major attention as potential means of selective insect control. Major advances in this field resulted from the identification of Juvenile Hormones -1, -2, and -3, and the discovery that various terpenoid and sesquiterpenoid derivatives were more potent morphogenetic agents than the three known Juvenile Hormones. Several highly active compounds have emerged from these research programs. Their field performance, problems, and prospects in selective insect control are considered here.

干扰昆虫生长发育的化学物质(形态发生剂)作为昆虫选择性防治的潜在手段受到了广泛关注。该领域的主要进展是鉴定了幼代激素-1、-2和-3，并发现各种萜类和倍半萜类衍生物比三种已知的幼代激素更有效的形态发生剂。从这些研究项目中已经发现了几种高活性化合物。本文介绍了它们在昆虫选择性防治中的应用现状、存在的问题和前景。
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引用次数: 10
Formation of trihalomethanes by chlorination of surface water. 地表水氯化作用下三卤甲烷的形成。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509435822
W W Bunn, B B Haas, E R Deane, R D Kleopfer

Chloroform, bromodichloromethane, dibromochloromethane, bromoform, and dichloroiodomethane have been found in chlorinated drinking water. In addition to these five compounds, the other possible trihalomethanes (chlorodiiodomethane, bromochloroiodomethane, dibromoiodomethane, bromodiiodomethane, and iodoform) can also be formed by chlorination of surface water containing bromides and iodides. Mass spectra for each of these ten compounds were obtained.

氯仿、溴二氯甲烷、二溴氯甲烷、溴仿和二氯碘甲烷已在氯化饮用水中被发现。除了这五种化合物外，其他可能的三卤甲烷(氯二碘甲烷、溴氯碘甲烷、二溴碘甲烷、溴碘甲烷和碘仿)也可以通过氯化处理含有溴化物和碘化物的地表水而形成。得到了这10种化合物的质谱。
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引用次数: 77
On the effect of iron-citrate on the growth of the Flordia red-tide organism, Gymnodinium breve. 柠檬酸铁对Flordia赤潮生物Gymnodinium breve生长的影响。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509437456
Y S Kim, D F Martin
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引用次数: 0
Further remarks on red tide models. 关于红潮模型的进一步说明。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509435849
T Wyatt

Vertical migration as an accumulation mechanism in the formation of red tide models is discussed with reference to extant mathematical models. Its relationship to other biological and physical factors such as population density changes, tidal rhythms, nutrient limitation and light intensity is evaluated in terms of its possible causal role in red tides.

参考现有的数学模型，讨论了垂直迁移作为赤潮模式形成的积累机制。它与其他生物和物理因素(如人口密度变化、潮汐节奏、营养限制和光照强度)的关系被评估为红潮的可能原因。
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引用次数: 3
Charged aerosol particles and air pollution. 带电气溶胶粒子与空气污染。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509435808
J R Brock, W H Marlow

Possible environmental effects and the importance of charged aerosol particles are examined. Some calculations of the evolution of the charge distribution of the atmospheric aerosol are presented. Several possible environmental effects of particle charge are noted including effects on particle coagulation, dry deposition, and deposition in the lung. Finally some problems in aerosol charging are reviewed as they pertain to various technical operations in air pollution control.

研究了可能的环境影响和带电气溶胶粒子的重要性。本文给出了大气气溶胶电荷分布演变的一些计算方法。注意到微粒电荷的几种可能的环境影响，包括对微粒凝结、干沉积和肺沉积的影响。最后，就大气污染治理中各种技术操作中涉及到的气溶胶充电问题进行了综述。
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引用次数: 10
Poisonous red tide organisms. 有毒的红潮生物。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509435851
E J Schantz
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引用次数: 9
Effects of polluted and non-polluted sediments on the growth of Gonyaulax tamarensis. 污染与未污染沉积物对塔玛菌生长的影响。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509437454
S Hanson, E S Gilfillan

Cultures of Gonyaulax tamarensis were grown on Hastings medium based on 100%, 10%, 1%, 0.1% and 0% (control) of seawater elutrients of bottom sediments. Both "clean" and heavily polluted sediments were used. Very low concentrations of polluted elutrients (0.01% v/v) slightly enhanced the growth of Gonvaulax tamarensis; greater concentrations of polluted elutrient depressed growth. Elutrient from "clean" sediments did not enhance growth; the depression of growth at any given elutrient concentrate was not as great as that seen with the polluted elutrients.

在100%、10%、1%、0.1%和0%(对照)的黑斯廷斯培养基上培养塔玛氏Gonyaulax tamarensis。“干净”和严重污染的沉积物都被使用。极低浓度(0.01% v/v)污染的淋洗液能轻微促进塔玛菌的生长;受污染的养分浓度越高，生长就越慢。来自“干净”沉积物的养分不能促进生长;在任何给定的浓缩营养液中，对生长的抑制都没有污染营养液中看到的那么大。
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引用次数: 1
Electron capture gas chromatographic methodology for the quantitation of polychlorinated biphenyls: survey and compromise. 多氯联苯定量的电子捕获气相色谱方法:调查和妥协。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509437423
A S Chau, R C Sampson

A uniform approach to quantitation of environmental PCB residues was sought. There exists a requirement for a reasonable compromise between accurate analysis and the ability to handle large numbers of samples. An international survey of electron-capture gas chromatographic methods utilized by laboratories currently analyzing for PCB was conducted from the Canada Centre for Inland Waters. Subsequent evaluation of the methods received has led to adoption of a uniform basic procedure which fulfils the objectives and demonstrates a wide general applicability.

寻求一种统一的方法来定量环境中多氯联苯残留。在准确的分析和处理大量样品的能力之间有一个合理的折衷的要求。加拿大内陆水域中心对目前分析多氯联苯的实验室使用的电子捕获气相色谱方法进行了一项国际调查。随后对所收到的方法进行的评价导致通过了一项统一的基本程序，该程序实现了各项目标并显示出广泛的普遍适用性。
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引用次数: 13
Alternate methods of insect control to improve environmental quality. Introduction. 防治昆虫的替代方法，以改善环境质量。介绍。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509435832
M Jacobson
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引用次数: 0
Conformational isomerism in Na3[Co(NO2)6]. Na3[Co(NO2)6]的构象异构。
Environmental letters
Pub Date : 1975-01-01 DOI: 10.1080/00139307509437425
D A Johnson, K A Pashman
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引用次数: 1
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